| 1 | /* Random utility Lisp functions. |
| 2 | Copyright (C) 1985, 1986, 1987, 1993, 1994, 1995, 1997, 1998, 1999, 2000, |
| 3 | 2001, 2002, 2003, 2004, 2005 Free Software Foundation, Inc. |
| 4 | |
| 5 | This file is part of GNU Emacs. |
| 6 | |
| 7 | GNU Emacs is free software; you can redistribute it and/or modify |
| 8 | it under the terms of the GNU General Public License as published by |
| 9 | the Free Software Foundation; either version 2, or (at your option) |
| 10 | any later version. |
| 11 | |
| 12 | GNU Emacs is distributed in the hope that it will be useful, |
| 13 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 15 | GNU General Public License for more details. |
| 16 | |
| 17 | You should have received a copy of the GNU General Public License |
| 18 | along with GNU Emacs; see the file COPYING. If not, write to |
| 19 | the Free Software Foundation, Inc., 59 Temple Place - Suite 330, |
| 20 | Boston, MA 02111-1307, USA. */ |
| 21 | |
| 22 | #include <config.h> |
| 23 | |
| 24 | #ifdef HAVE_UNISTD_H |
| 25 | #include <unistd.h> |
| 26 | #endif |
| 27 | #include <time.h> |
| 28 | |
| 29 | #ifndef MAC_OS |
| 30 | /* On Mac OS, defining this conflicts with precompiled headers. */ |
| 31 | |
| 32 | /* Note on some machines this defines `vector' as a typedef, |
| 33 | so make sure we don't use that name in this file. */ |
| 34 | #undef vector |
| 35 | #define vector ***** |
| 36 | |
| 37 | #endif /* ! MAC_OSX */ |
| 38 | |
| 39 | #include "lisp.h" |
| 40 | #include "commands.h" |
| 41 | #include "charset.h" |
| 42 | #include "coding.h" |
| 43 | #include "buffer.h" |
| 44 | #include "keyboard.h" |
| 45 | #include "keymap.h" |
| 46 | #include "intervals.h" |
| 47 | #include "frame.h" |
| 48 | #include "window.h" |
| 49 | #include "blockinput.h" |
| 50 | #if defined (HAVE_MENUS) && defined (HAVE_X_WINDOWS) |
| 51 | #include "xterm.h" |
| 52 | #endif |
| 53 | |
| 54 | #ifndef NULL |
| 55 | #define NULL ((POINTER_TYPE *)0) |
| 56 | #endif |
| 57 | |
| 58 | /* Nonzero enables use of dialog boxes for questions |
| 59 | asked by mouse commands. */ |
| 60 | int use_dialog_box; |
| 61 | |
| 62 | /* Nonzero enables use of a file dialog for file name |
| 63 | questions asked by mouse commands. */ |
| 64 | int use_file_dialog; |
| 65 | |
| 66 | extern int minibuffer_auto_raise; |
| 67 | extern Lisp_Object minibuf_window; |
| 68 | extern Lisp_Object Vlocale_coding_system; |
| 69 | extern Lisp_Object Vloads_in_progress; |
| 70 | |
| 71 | Lisp_Object Qstring_lessp, Qprovide, Qrequire; |
| 72 | Lisp_Object Qyes_or_no_p_history; |
| 73 | Lisp_Object Qcursor_in_echo_area; |
| 74 | Lisp_Object Qwidget_type; |
| 75 | Lisp_Object Qcodeset, Qdays, Qmonths, Qpaper; |
| 76 | |
| 77 | extern Lisp_Object Qinput_method_function; |
| 78 | |
| 79 | static int internal_equal (); |
| 80 | |
| 81 | extern long get_random (); |
| 82 | extern void seed_random (); |
| 83 | |
| 84 | #ifndef HAVE_UNISTD_H |
| 85 | extern long time (); |
| 86 | #endif |
| 87 | \f |
| 88 | DEFUN ("identity", Fidentity, Sidentity, 1, 1, 0, |
| 89 | doc: /* Return the argument unchanged. */) |
| 90 | (arg) |
| 91 | Lisp_Object arg; |
| 92 | { |
| 93 | return arg; |
| 94 | } |
| 95 | |
| 96 | DEFUN ("random", Frandom, Srandom, 0, 1, 0, |
| 97 | doc: /* Return a pseudo-random number. |
| 98 | All integers representable in Lisp are equally likely. |
| 99 | On most systems, this is 29 bits' worth. |
| 100 | With positive integer argument N, return random number in interval [0,N). |
| 101 | With argument t, set the random number seed from the current time and pid. */) |
| 102 | (n) |
| 103 | Lisp_Object n; |
| 104 | { |
| 105 | EMACS_INT val; |
| 106 | Lisp_Object lispy_val; |
| 107 | unsigned long denominator; |
| 108 | |
| 109 | if (EQ (n, Qt)) |
| 110 | seed_random (getpid () + time (NULL)); |
| 111 | if (NATNUMP (n) && XFASTINT (n) != 0) |
| 112 | { |
| 113 | /* Try to take our random number from the higher bits of VAL, |
| 114 | not the lower, since (says Gentzel) the low bits of `random' |
| 115 | are less random than the higher ones. We do this by using the |
| 116 | quotient rather than the remainder. At the high end of the RNG |
| 117 | it's possible to get a quotient larger than n; discarding |
| 118 | these values eliminates the bias that would otherwise appear |
| 119 | when using a large n. */ |
| 120 | denominator = ((unsigned long)1 << VALBITS) / XFASTINT (n); |
| 121 | do |
| 122 | val = get_random () / denominator; |
| 123 | while (val >= XFASTINT (n)); |
| 124 | } |
| 125 | else |
| 126 | val = get_random (); |
| 127 | XSETINT (lispy_val, val); |
| 128 | return lispy_val; |
| 129 | } |
| 130 | \f |
| 131 | /* Random data-structure functions */ |
| 132 | |
| 133 | DEFUN ("length", Flength, Slength, 1, 1, 0, |
| 134 | doc: /* Return the length of vector, list or string SEQUENCE. |
| 135 | A byte-code function object is also allowed. |
| 136 | If the string contains multibyte characters, this is not necessarily |
| 137 | the number of bytes in the string; it is the number of characters. |
| 138 | To get the number of bytes, use `string-bytes'. */) |
| 139 | (sequence) |
| 140 | register Lisp_Object sequence; |
| 141 | { |
| 142 | register Lisp_Object val; |
| 143 | register int i; |
| 144 | |
| 145 | retry: |
| 146 | if (STRINGP (sequence)) |
| 147 | XSETFASTINT (val, SCHARS (sequence)); |
| 148 | else if (VECTORP (sequence)) |
| 149 | XSETFASTINT (val, XVECTOR (sequence)->size); |
| 150 | else if (SUB_CHAR_TABLE_P (sequence)) |
| 151 | XSETFASTINT (val, SUB_CHAR_TABLE_ORDINARY_SLOTS); |
| 152 | else if (CHAR_TABLE_P (sequence)) |
| 153 | XSETFASTINT (val, MAX_CHAR); |
| 154 | else if (BOOL_VECTOR_P (sequence)) |
| 155 | XSETFASTINT (val, XBOOL_VECTOR (sequence)->size); |
| 156 | else if (COMPILEDP (sequence)) |
| 157 | XSETFASTINT (val, XVECTOR (sequence)->size & PSEUDOVECTOR_SIZE_MASK); |
| 158 | else if (CONSP (sequence)) |
| 159 | { |
| 160 | i = 0; |
| 161 | while (CONSP (sequence)) |
| 162 | { |
| 163 | sequence = XCDR (sequence); |
| 164 | ++i; |
| 165 | |
| 166 | if (!CONSP (sequence)) |
| 167 | break; |
| 168 | |
| 169 | sequence = XCDR (sequence); |
| 170 | ++i; |
| 171 | QUIT; |
| 172 | } |
| 173 | |
| 174 | if (!NILP (sequence)) |
| 175 | wrong_type_argument (Qlistp, sequence); |
| 176 | |
| 177 | val = make_number (i); |
| 178 | } |
| 179 | else if (NILP (sequence)) |
| 180 | XSETFASTINT (val, 0); |
| 181 | else |
| 182 | { |
| 183 | sequence = wrong_type_argument (Qsequencep, sequence); |
| 184 | goto retry; |
| 185 | } |
| 186 | return val; |
| 187 | } |
| 188 | |
| 189 | /* This does not check for quits. That is safe |
| 190 | since it must terminate. */ |
| 191 | |
| 192 | DEFUN ("safe-length", Fsafe_length, Ssafe_length, 1, 1, 0, |
| 193 | doc: /* Return the length of a list, but avoid error or infinite loop. |
| 194 | This function never gets an error. If LIST is not really a list, |
| 195 | it returns 0. If LIST is circular, it returns a finite value |
| 196 | which is at least the number of distinct elements. */) |
| 197 | (list) |
| 198 | Lisp_Object list; |
| 199 | { |
| 200 | Lisp_Object tail, halftail, length; |
| 201 | int len = 0; |
| 202 | |
| 203 | /* halftail is used to detect circular lists. */ |
| 204 | halftail = list; |
| 205 | for (tail = list; CONSP (tail); tail = XCDR (tail)) |
| 206 | { |
| 207 | if (EQ (tail, halftail) && len != 0) |
| 208 | break; |
| 209 | len++; |
| 210 | if ((len & 1) == 0) |
| 211 | halftail = XCDR (halftail); |
| 212 | } |
| 213 | |
| 214 | XSETINT (length, len); |
| 215 | return length; |
| 216 | } |
| 217 | |
| 218 | DEFUN ("string-bytes", Fstring_bytes, Sstring_bytes, 1, 1, 0, |
| 219 | doc: /* Return the number of bytes in STRING. |
| 220 | If STRING is a multibyte string, this is greater than the length of STRING. */) |
| 221 | (string) |
| 222 | Lisp_Object string; |
| 223 | { |
| 224 | CHECK_STRING (string); |
| 225 | return make_number (SBYTES (string)); |
| 226 | } |
| 227 | |
| 228 | DEFUN ("string-equal", Fstring_equal, Sstring_equal, 2, 2, 0, |
| 229 | doc: /* Return t if two strings have identical contents. |
| 230 | Case is significant, but text properties are ignored. |
| 231 | Symbols are also allowed; their print names are used instead. */) |
| 232 | (s1, s2) |
| 233 | register Lisp_Object s1, s2; |
| 234 | { |
| 235 | if (SYMBOLP (s1)) |
| 236 | s1 = SYMBOL_NAME (s1); |
| 237 | if (SYMBOLP (s2)) |
| 238 | s2 = SYMBOL_NAME (s2); |
| 239 | CHECK_STRING (s1); |
| 240 | CHECK_STRING (s2); |
| 241 | |
| 242 | if (SCHARS (s1) != SCHARS (s2) |
| 243 | || SBYTES (s1) != SBYTES (s2) |
| 244 | || bcmp (SDATA (s1), SDATA (s2), SBYTES (s1))) |
| 245 | return Qnil; |
| 246 | return Qt; |
| 247 | } |
| 248 | |
| 249 | DEFUN ("compare-strings", Fcompare_strings, |
| 250 | Scompare_strings, 6, 7, 0, |
| 251 | doc: /* Compare the contents of two strings, converting to multibyte if needed. |
| 252 | In string STR1, skip the first START1 characters and stop at END1. |
| 253 | In string STR2, skip the first START2 characters and stop at END2. |
| 254 | END1 and END2 default to the full lengths of the respective strings. |
| 255 | |
| 256 | Case is significant in this comparison if IGNORE-CASE is nil. |
| 257 | Unibyte strings are converted to multibyte for comparison. |
| 258 | |
| 259 | The value is t if the strings (or specified portions) match. |
| 260 | If string STR1 is less, the value is a negative number N; |
| 261 | - 1 - N is the number of characters that match at the beginning. |
| 262 | If string STR1 is greater, the value is a positive number N; |
| 263 | N - 1 is the number of characters that match at the beginning. */) |
| 264 | (str1, start1, end1, str2, start2, end2, ignore_case) |
| 265 | Lisp_Object str1, start1, end1, start2, str2, end2, ignore_case; |
| 266 | { |
| 267 | register int end1_char, end2_char; |
| 268 | register int i1, i1_byte, i2, i2_byte; |
| 269 | |
| 270 | CHECK_STRING (str1); |
| 271 | CHECK_STRING (str2); |
| 272 | if (NILP (start1)) |
| 273 | start1 = make_number (0); |
| 274 | if (NILP (start2)) |
| 275 | start2 = make_number (0); |
| 276 | CHECK_NATNUM (start1); |
| 277 | CHECK_NATNUM (start2); |
| 278 | if (! NILP (end1)) |
| 279 | CHECK_NATNUM (end1); |
| 280 | if (! NILP (end2)) |
| 281 | CHECK_NATNUM (end2); |
| 282 | |
| 283 | i1 = XINT (start1); |
| 284 | i2 = XINT (start2); |
| 285 | |
| 286 | i1_byte = string_char_to_byte (str1, i1); |
| 287 | i2_byte = string_char_to_byte (str2, i2); |
| 288 | |
| 289 | end1_char = SCHARS (str1); |
| 290 | if (! NILP (end1) && end1_char > XINT (end1)) |
| 291 | end1_char = XINT (end1); |
| 292 | |
| 293 | end2_char = SCHARS (str2); |
| 294 | if (! NILP (end2) && end2_char > XINT (end2)) |
| 295 | end2_char = XINT (end2); |
| 296 | |
| 297 | while (i1 < end1_char && i2 < end2_char) |
| 298 | { |
| 299 | /* When we find a mismatch, we must compare the |
| 300 | characters, not just the bytes. */ |
| 301 | int c1, c2; |
| 302 | |
| 303 | if (STRING_MULTIBYTE (str1)) |
| 304 | FETCH_STRING_CHAR_ADVANCE_NO_CHECK (c1, str1, i1, i1_byte); |
| 305 | else |
| 306 | { |
| 307 | c1 = SREF (str1, i1++); |
| 308 | c1 = unibyte_char_to_multibyte (c1); |
| 309 | } |
| 310 | |
| 311 | if (STRING_MULTIBYTE (str2)) |
| 312 | FETCH_STRING_CHAR_ADVANCE_NO_CHECK (c2, str2, i2, i2_byte); |
| 313 | else |
| 314 | { |
| 315 | c2 = SREF (str2, i2++); |
| 316 | c2 = unibyte_char_to_multibyte (c2); |
| 317 | } |
| 318 | |
| 319 | if (c1 == c2) |
| 320 | continue; |
| 321 | |
| 322 | if (! NILP (ignore_case)) |
| 323 | { |
| 324 | Lisp_Object tem; |
| 325 | |
| 326 | tem = Fupcase (make_number (c1)); |
| 327 | c1 = XINT (tem); |
| 328 | tem = Fupcase (make_number (c2)); |
| 329 | c2 = XINT (tem); |
| 330 | } |
| 331 | |
| 332 | if (c1 == c2) |
| 333 | continue; |
| 334 | |
| 335 | /* Note that I1 has already been incremented |
| 336 | past the character that we are comparing; |
| 337 | hence we don't add or subtract 1 here. */ |
| 338 | if (c1 < c2) |
| 339 | return make_number (- i1 + XINT (start1)); |
| 340 | else |
| 341 | return make_number (i1 - XINT (start1)); |
| 342 | } |
| 343 | |
| 344 | if (i1 < end1_char) |
| 345 | return make_number (i1 - XINT (start1) + 1); |
| 346 | if (i2 < end2_char) |
| 347 | return make_number (- i1 + XINT (start1) - 1); |
| 348 | |
| 349 | return Qt; |
| 350 | } |
| 351 | |
| 352 | DEFUN ("string-lessp", Fstring_lessp, Sstring_lessp, 2, 2, 0, |
| 353 | doc: /* Return t if first arg string is less than second in lexicographic order. |
| 354 | Case is significant. |
| 355 | Symbols are also allowed; their print names are used instead. */) |
| 356 | (s1, s2) |
| 357 | register Lisp_Object s1, s2; |
| 358 | { |
| 359 | register int end; |
| 360 | register int i1, i1_byte, i2, i2_byte; |
| 361 | |
| 362 | if (SYMBOLP (s1)) |
| 363 | s1 = SYMBOL_NAME (s1); |
| 364 | if (SYMBOLP (s2)) |
| 365 | s2 = SYMBOL_NAME (s2); |
| 366 | CHECK_STRING (s1); |
| 367 | CHECK_STRING (s2); |
| 368 | |
| 369 | i1 = i1_byte = i2 = i2_byte = 0; |
| 370 | |
| 371 | end = SCHARS (s1); |
| 372 | if (end > SCHARS (s2)) |
| 373 | end = SCHARS (s2); |
| 374 | |
| 375 | while (i1 < end) |
| 376 | { |
| 377 | /* When we find a mismatch, we must compare the |
| 378 | characters, not just the bytes. */ |
| 379 | int c1, c2; |
| 380 | |
| 381 | FETCH_STRING_CHAR_ADVANCE (c1, s1, i1, i1_byte); |
| 382 | FETCH_STRING_CHAR_ADVANCE (c2, s2, i2, i2_byte); |
| 383 | |
| 384 | if (c1 != c2) |
| 385 | return c1 < c2 ? Qt : Qnil; |
| 386 | } |
| 387 | return i1 < SCHARS (s2) ? Qt : Qnil; |
| 388 | } |
| 389 | \f |
| 390 | static Lisp_Object concat (); |
| 391 | |
| 392 | /* ARGSUSED */ |
| 393 | Lisp_Object |
| 394 | concat2 (s1, s2) |
| 395 | Lisp_Object s1, s2; |
| 396 | { |
| 397 | #ifdef NO_ARG_ARRAY |
| 398 | Lisp_Object args[2]; |
| 399 | args[0] = s1; |
| 400 | args[1] = s2; |
| 401 | return concat (2, args, Lisp_String, 0); |
| 402 | #else |
| 403 | return concat (2, &s1, Lisp_String, 0); |
| 404 | #endif /* NO_ARG_ARRAY */ |
| 405 | } |
| 406 | |
| 407 | /* ARGSUSED */ |
| 408 | Lisp_Object |
| 409 | concat3 (s1, s2, s3) |
| 410 | Lisp_Object s1, s2, s3; |
| 411 | { |
| 412 | #ifdef NO_ARG_ARRAY |
| 413 | Lisp_Object args[3]; |
| 414 | args[0] = s1; |
| 415 | args[1] = s2; |
| 416 | args[2] = s3; |
| 417 | return concat (3, args, Lisp_String, 0); |
| 418 | #else |
| 419 | return concat (3, &s1, Lisp_String, 0); |
| 420 | #endif /* NO_ARG_ARRAY */ |
| 421 | } |
| 422 | |
| 423 | DEFUN ("append", Fappend, Sappend, 0, MANY, 0, |
| 424 | doc: /* Concatenate all the arguments and make the result a list. |
| 425 | The result is a list whose elements are the elements of all the arguments. |
| 426 | Each argument may be a list, vector or string. |
| 427 | The last argument is not copied, just used as the tail of the new list. |
| 428 | usage: (append &rest SEQUENCES) */) |
| 429 | (nargs, args) |
| 430 | int nargs; |
| 431 | Lisp_Object *args; |
| 432 | { |
| 433 | return concat (nargs, args, Lisp_Cons, 1); |
| 434 | } |
| 435 | |
| 436 | DEFUN ("concat", Fconcat, Sconcat, 0, MANY, 0, |
| 437 | doc: /* Concatenate all the arguments and make the result a string. |
| 438 | The result is a string whose elements are the elements of all the arguments. |
| 439 | Each argument may be a string or a list or vector of characters (integers). |
| 440 | usage: (concat &rest SEQUENCES) */) |
| 441 | (nargs, args) |
| 442 | int nargs; |
| 443 | Lisp_Object *args; |
| 444 | { |
| 445 | return concat (nargs, args, Lisp_String, 0); |
| 446 | } |
| 447 | |
| 448 | DEFUN ("vconcat", Fvconcat, Svconcat, 0, MANY, 0, |
| 449 | doc: /* Concatenate all the arguments and make the result a vector. |
| 450 | The result is a vector whose elements are the elements of all the arguments. |
| 451 | Each argument may be a list, vector or string. |
| 452 | usage: (vconcat &rest SEQUENCES) */) |
| 453 | (nargs, args) |
| 454 | int nargs; |
| 455 | Lisp_Object *args; |
| 456 | { |
| 457 | return concat (nargs, args, Lisp_Vectorlike, 0); |
| 458 | } |
| 459 | |
| 460 | /* Return a copy of a sub char table ARG. The elements except for a |
| 461 | nested sub char table are not copied. */ |
| 462 | static Lisp_Object |
| 463 | copy_sub_char_table (arg) |
| 464 | Lisp_Object arg; |
| 465 | { |
| 466 | Lisp_Object copy = make_sub_char_table (XCHAR_TABLE (arg)->defalt); |
| 467 | int i; |
| 468 | |
| 469 | /* Copy all the contents. */ |
| 470 | bcopy (XCHAR_TABLE (arg)->contents, XCHAR_TABLE (copy)->contents, |
| 471 | SUB_CHAR_TABLE_ORDINARY_SLOTS * sizeof (Lisp_Object)); |
| 472 | /* Recursively copy any sub char-tables in the ordinary slots. */ |
| 473 | for (i = 32; i < SUB_CHAR_TABLE_ORDINARY_SLOTS; i++) |
| 474 | if (SUB_CHAR_TABLE_P (XCHAR_TABLE (arg)->contents[i])) |
| 475 | XCHAR_TABLE (copy)->contents[i] |
| 476 | = copy_sub_char_table (XCHAR_TABLE (copy)->contents[i]); |
| 477 | |
| 478 | return copy; |
| 479 | } |
| 480 | |
| 481 | |
| 482 | DEFUN ("copy-sequence", Fcopy_sequence, Scopy_sequence, 1, 1, 0, |
| 483 | doc: /* Return a copy of a list, vector, string or char-table. |
| 484 | The elements of a list or vector are not copied; they are shared |
| 485 | with the original. */) |
| 486 | (arg) |
| 487 | Lisp_Object arg; |
| 488 | { |
| 489 | if (NILP (arg)) return arg; |
| 490 | |
| 491 | if (CHAR_TABLE_P (arg)) |
| 492 | { |
| 493 | int i; |
| 494 | Lisp_Object copy; |
| 495 | |
| 496 | copy = Fmake_char_table (XCHAR_TABLE (arg)->purpose, Qnil); |
| 497 | /* Copy all the slots, including the extra ones. */ |
| 498 | bcopy (XVECTOR (arg)->contents, XVECTOR (copy)->contents, |
| 499 | ((XCHAR_TABLE (arg)->size & PSEUDOVECTOR_SIZE_MASK) |
| 500 | * sizeof (Lisp_Object))); |
| 501 | |
| 502 | /* Recursively copy any sub char tables in the ordinary slots |
| 503 | for multibyte characters. */ |
| 504 | for (i = CHAR_TABLE_SINGLE_BYTE_SLOTS; |
| 505 | i < CHAR_TABLE_ORDINARY_SLOTS; i++) |
| 506 | if (SUB_CHAR_TABLE_P (XCHAR_TABLE (arg)->contents[i])) |
| 507 | XCHAR_TABLE (copy)->contents[i] |
| 508 | = copy_sub_char_table (XCHAR_TABLE (copy)->contents[i]); |
| 509 | |
| 510 | return copy; |
| 511 | } |
| 512 | |
| 513 | if (BOOL_VECTOR_P (arg)) |
| 514 | { |
| 515 | Lisp_Object val; |
| 516 | int size_in_chars |
| 517 | = ((XBOOL_VECTOR (arg)->size + BOOL_VECTOR_BITS_PER_CHAR - 1) |
| 518 | / BOOL_VECTOR_BITS_PER_CHAR); |
| 519 | |
| 520 | val = Fmake_bool_vector (Flength (arg), Qnil); |
| 521 | bcopy (XBOOL_VECTOR (arg)->data, XBOOL_VECTOR (val)->data, |
| 522 | size_in_chars); |
| 523 | return val; |
| 524 | } |
| 525 | |
| 526 | if (!CONSP (arg) && !VECTORP (arg) && !STRINGP (arg)) |
| 527 | arg = wrong_type_argument (Qsequencep, arg); |
| 528 | return concat (1, &arg, CONSP (arg) ? Lisp_Cons : XTYPE (arg), 0); |
| 529 | } |
| 530 | |
| 531 | /* This structure holds information of an argument of `concat' that is |
| 532 | a string and has text properties to be copied. */ |
| 533 | struct textprop_rec |
| 534 | { |
| 535 | int argnum; /* refer to ARGS (arguments of `concat') */ |
| 536 | int from; /* refer to ARGS[argnum] (argument string) */ |
| 537 | int to; /* refer to VAL (the target string) */ |
| 538 | }; |
| 539 | |
| 540 | static Lisp_Object |
| 541 | concat (nargs, args, target_type, last_special) |
| 542 | int nargs; |
| 543 | Lisp_Object *args; |
| 544 | enum Lisp_Type target_type; |
| 545 | int last_special; |
| 546 | { |
| 547 | Lisp_Object val; |
| 548 | register Lisp_Object tail; |
| 549 | register Lisp_Object this; |
| 550 | int toindex; |
| 551 | int toindex_byte = 0; |
| 552 | register int result_len; |
| 553 | register int result_len_byte; |
| 554 | register int argnum; |
| 555 | Lisp_Object last_tail; |
| 556 | Lisp_Object prev; |
| 557 | int some_multibyte; |
| 558 | /* When we make a multibyte string, we can't copy text properties |
| 559 | while concatinating each string because the length of resulting |
| 560 | string can't be decided until we finish the whole concatination. |
| 561 | So, we record strings that have text properties to be copied |
| 562 | here, and copy the text properties after the concatination. */ |
| 563 | struct textprop_rec *textprops = NULL; |
| 564 | /* Number of elments in textprops. */ |
| 565 | int num_textprops = 0; |
| 566 | USE_SAFE_ALLOCA; |
| 567 | |
| 568 | tail = Qnil; |
| 569 | |
| 570 | /* In append, the last arg isn't treated like the others */ |
| 571 | if (last_special && nargs > 0) |
| 572 | { |
| 573 | nargs--; |
| 574 | last_tail = args[nargs]; |
| 575 | } |
| 576 | else |
| 577 | last_tail = Qnil; |
| 578 | |
| 579 | /* Canonicalize each argument. */ |
| 580 | for (argnum = 0; argnum < nargs; argnum++) |
| 581 | { |
| 582 | this = args[argnum]; |
| 583 | if (!(CONSP (this) || NILP (this) || VECTORP (this) || STRINGP (this) |
| 584 | || COMPILEDP (this) || BOOL_VECTOR_P (this))) |
| 585 | { |
| 586 | args[argnum] = wrong_type_argument (Qsequencep, this); |
| 587 | } |
| 588 | } |
| 589 | |
| 590 | /* Compute total length in chars of arguments in RESULT_LEN. |
| 591 | If desired output is a string, also compute length in bytes |
| 592 | in RESULT_LEN_BYTE, and determine in SOME_MULTIBYTE |
| 593 | whether the result should be a multibyte string. */ |
| 594 | result_len_byte = 0; |
| 595 | result_len = 0; |
| 596 | some_multibyte = 0; |
| 597 | for (argnum = 0; argnum < nargs; argnum++) |
| 598 | { |
| 599 | int len; |
| 600 | this = args[argnum]; |
| 601 | len = XFASTINT (Flength (this)); |
| 602 | if (target_type == Lisp_String) |
| 603 | { |
| 604 | /* We must count the number of bytes needed in the string |
| 605 | as well as the number of characters. */ |
| 606 | int i; |
| 607 | Lisp_Object ch; |
| 608 | int this_len_byte; |
| 609 | |
| 610 | if (VECTORP (this)) |
| 611 | for (i = 0; i < len; i++) |
| 612 | { |
| 613 | ch = XVECTOR (this)->contents[i]; |
| 614 | if (! INTEGERP (ch)) |
| 615 | wrong_type_argument (Qintegerp, ch); |
| 616 | this_len_byte = CHAR_BYTES (XINT (ch)); |
| 617 | result_len_byte += this_len_byte; |
| 618 | if (!SINGLE_BYTE_CHAR_P (XINT (ch))) |
| 619 | some_multibyte = 1; |
| 620 | } |
| 621 | else if (BOOL_VECTOR_P (this) && XBOOL_VECTOR (this)->size > 0) |
| 622 | wrong_type_argument (Qintegerp, Faref (this, make_number (0))); |
| 623 | else if (CONSP (this)) |
| 624 | for (; CONSP (this); this = XCDR (this)) |
| 625 | { |
| 626 | ch = XCAR (this); |
| 627 | if (! INTEGERP (ch)) |
| 628 | wrong_type_argument (Qintegerp, ch); |
| 629 | this_len_byte = CHAR_BYTES (XINT (ch)); |
| 630 | result_len_byte += this_len_byte; |
| 631 | if (!SINGLE_BYTE_CHAR_P (XINT (ch))) |
| 632 | some_multibyte = 1; |
| 633 | } |
| 634 | else if (STRINGP (this)) |
| 635 | { |
| 636 | if (STRING_MULTIBYTE (this)) |
| 637 | { |
| 638 | some_multibyte = 1; |
| 639 | result_len_byte += SBYTES (this); |
| 640 | } |
| 641 | else |
| 642 | result_len_byte += count_size_as_multibyte (SDATA (this), |
| 643 | SCHARS (this)); |
| 644 | } |
| 645 | } |
| 646 | |
| 647 | result_len += len; |
| 648 | } |
| 649 | |
| 650 | if (! some_multibyte) |
| 651 | result_len_byte = result_len; |
| 652 | |
| 653 | /* Create the output object. */ |
| 654 | if (target_type == Lisp_Cons) |
| 655 | val = Fmake_list (make_number (result_len), Qnil); |
| 656 | else if (target_type == Lisp_Vectorlike) |
| 657 | val = Fmake_vector (make_number (result_len), Qnil); |
| 658 | else if (some_multibyte) |
| 659 | val = make_uninit_multibyte_string (result_len, result_len_byte); |
| 660 | else |
| 661 | val = make_uninit_string (result_len); |
| 662 | |
| 663 | /* In `append', if all but last arg are nil, return last arg. */ |
| 664 | if (target_type == Lisp_Cons && EQ (val, Qnil)) |
| 665 | return last_tail; |
| 666 | |
| 667 | /* Copy the contents of the args into the result. */ |
| 668 | if (CONSP (val)) |
| 669 | tail = val, toindex = -1; /* -1 in toindex is flag we are making a list */ |
| 670 | else |
| 671 | toindex = 0, toindex_byte = 0; |
| 672 | |
| 673 | prev = Qnil; |
| 674 | if (STRINGP (val)) |
| 675 | SAFE_ALLOCA (textprops, struct textprop_rec *, sizeof (struct textprop_rec) * nargs); |
| 676 | |
| 677 | for (argnum = 0; argnum < nargs; argnum++) |
| 678 | { |
| 679 | Lisp_Object thislen; |
| 680 | int thisleni = 0; |
| 681 | register unsigned int thisindex = 0; |
| 682 | register unsigned int thisindex_byte = 0; |
| 683 | |
| 684 | this = args[argnum]; |
| 685 | if (!CONSP (this)) |
| 686 | thislen = Flength (this), thisleni = XINT (thislen); |
| 687 | |
| 688 | /* Between strings of the same kind, copy fast. */ |
| 689 | if (STRINGP (this) && STRINGP (val) |
| 690 | && STRING_MULTIBYTE (this) == some_multibyte) |
| 691 | { |
| 692 | int thislen_byte = SBYTES (this); |
| 693 | |
| 694 | bcopy (SDATA (this), SDATA (val) + toindex_byte, |
| 695 | SBYTES (this)); |
| 696 | if (! NULL_INTERVAL_P (STRING_INTERVALS (this))) |
| 697 | { |
| 698 | textprops[num_textprops].argnum = argnum; |
| 699 | textprops[num_textprops].from = 0; |
| 700 | textprops[num_textprops++].to = toindex; |
| 701 | } |
| 702 | toindex_byte += thislen_byte; |
| 703 | toindex += thisleni; |
| 704 | STRING_SET_CHARS (val, SCHARS (val)); |
| 705 | } |
| 706 | /* Copy a single-byte string to a multibyte string. */ |
| 707 | else if (STRINGP (this) && STRINGP (val)) |
| 708 | { |
| 709 | if (! NULL_INTERVAL_P (STRING_INTERVALS (this))) |
| 710 | { |
| 711 | textprops[num_textprops].argnum = argnum; |
| 712 | textprops[num_textprops].from = 0; |
| 713 | textprops[num_textprops++].to = toindex; |
| 714 | } |
| 715 | toindex_byte += copy_text (SDATA (this), |
| 716 | SDATA (val) + toindex_byte, |
| 717 | SCHARS (this), 0, 1); |
| 718 | toindex += thisleni; |
| 719 | } |
| 720 | else |
| 721 | /* Copy element by element. */ |
| 722 | while (1) |
| 723 | { |
| 724 | register Lisp_Object elt; |
| 725 | |
| 726 | /* Fetch next element of `this' arg into `elt', or break if |
| 727 | `this' is exhausted. */ |
| 728 | if (NILP (this)) break; |
| 729 | if (CONSP (this)) |
| 730 | elt = XCAR (this), this = XCDR (this); |
| 731 | else if (thisindex >= thisleni) |
| 732 | break; |
| 733 | else if (STRINGP (this)) |
| 734 | { |
| 735 | int c; |
| 736 | if (STRING_MULTIBYTE (this)) |
| 737 | { |
| 738 | FETCH_STRING_CHAR_ADVANCE_NO_CHECK (c, this, |
| 739 | thisindex, |
| 740 | thisindex_byte); |
| 741 | XSETFASTINT (elt, c); |
| 742 | } |
| 743 | else |
| 744 | { |
| 745 | XSETFASTINT (elt, SREF (this, thisindex)); thisindex++; |
| 746 | if (some_multibyte |
| 747 | && (XINT (elt) >= 0240 |
| 748 | || (XINT (elt) >= 0200 |
| 749 | && ! NILP (Vnonascii_translation_table))) |
| 750 | && XINT (elt) < 0400) |
| 751 | { |
| 752 | c = unibyte_char_to_multibyte (XINT (elt)); |
| 753 | XSETINT (elt, c); |
| 754 | } |
| 755 | } |
| 756 | } |
| 757 | else if (BOOL_VECTOR_P (this)) |
| 758 | { |
| 759 | int byte; |
| 760 | byte = XBOOL_VECTOR (this)->data[thisindex / BOOL_VECTOR_BITS_PER_CHAR]; |
| 761 | if (byte & (1 << (thisindex % BOOL_VECTOR_BITS_PER_CHAR))) |
| 762 | elt = Qt; |
| 763 | else |
| 764 | elt = Qnil; |
| 765 | thisindex++; |
| 766 | } |
| 767 | else |
| 768 | elt = XVECTOR (this)->contents[thisindex++]; |
| 769 | |
| 770 | /* Store this element into the result. */ |
| 771 | if (toindex < 0) |
| 772 | { |
| 773 | XSETCAR (tail, elt); |
| 774 | prev = tail; |
| 775 | tail = XCDR (tail); |
| 776 | } |
| 777 | else if (VECTORP (val)) |
| 778 | XVECTOR (val)->contents[toindex++] = elt; |
| 779 | else |
| 780 | { |
| 781 | CHECK_NUMBER (elt); |
| 782 | if (SINGLE_BYTE_CHAR_P (XINT (elt))) |
| 783 | { |
| 784 | if (some_multibyte) |
| 785 | toindex_byte |
| 786 | += CHAR_STRING (XINT (elt), |
| 787 | SDATA (val) + toindex_byte); |
| 788 | else |
| 789 | SSET (val, toindex_byte++, XINT (elt)); |
| 790 | toindex++; |
| 791 | } |
| 792 | else |
| 793 | /* If we have any multibyte characters, |
| 794 | we already decided to make a multibyte string. */ |
| 795 | { |
| 796 | int c = XINT (elt); |
| 797 | /* P exists as a variable |
| 798 | to avoid a bug on the Masscomp C compiler. */ |
| 799 | unsigned char *p = SDATA (val) + toindex_byte; |
| 800 | |
| 801 | toindex_byte += CHAR_STRING (c, p); |
| 802 | toindex++; |
| 803 | } |
| 804 | } |
| 805 | } |
| 806 | } |
| 807 | if (!NILP (prev)) |
| 808 | XSETCDR (prev, last_tail); |
| 809 | |
| 810 | if (num_textprops > 0) |
| 811 | { |
| 812 | Lisp_Object props; |
| 813 | int last_to_end = -1; |
| 814 | |
| 815 | for (argnum = 0; argnum < num_textprops; argnum++) |
| 816 | { |
| 817 | this = args[textprops[argnum].argnum]; |
| 818 | props = text_property_list (this, |
| 819 | make_number (0), |
| 820 | make_number (SCHARS (this)), |
| 821 | Qnil); |
| 822 | /* If successive arguments have properites, be sure that the |
| 823 | value of `composition' property be the copy. */ |
| 824 | if (last_to_end == textprops[argnum].to) |
| 825 | make_composition_value_copy (props); |
| 826 | add_text_properties_from_list (val, props, |
| 827 | make_number (textprops[argnum].to)); |
| 828 | last_to_end = textprops[argnum].to + SCHARS (this); |
| 829 | } |
| 830 | } |
| 831 | |
| 832 | SAFE_FREE (); |
| 833 | return val; |
| 834 | } |
| 835 | \f |
| 836 | static Lisp_Object string_char_byte_cache_string; |
| 837 | static int string_char_byte_cache_charpos; |
| 838 | static int string_char_byte_cache_bytepos; |
| 839 | |
| 840 | void |
| 841 | clear_string_char_byte_cache () |
| 842 | { |
| 843 | string_char_byte_cache_string = Qnil; |
| 844 | } |
| 845 | |
| 846 | /* Return the character index corresponding to CHAR_INDEX in STRING. */ |
| 847 | |
| 848 | int |
| 849 | string_char_to_byte (string, char_index) |
| 850 | Lisp_Object string; |
| 851 | int char_index; |
| 852 | { |
| 853 | int i, i_byte; |
| 854 | int best_below, best_below_byte; |
| 855 | int best_above, best_above_byte; |
| 856 | |
| 857 | best_below = best_below_byte = 0; |
| 858 | best_above = SCHARS (string); |
| 859 | best_above_byte = SBYTES (string); |
| 860 | if (best_above == best_above_byte) |
| 861 | return char_index; |
| 862 | |
| 863 | if (EQ (string, string_char_byte_cache_string)) |
| 864 | { |
| 865 | if (string_char_byte_cache_charpos < char_index) |
| 866 | { |
| 867 | best_below = string_char_byte_cache_charpos; |
| 868 | best_below_byte = string_char_byte_cache_bytepos; |
| 869 | } |
| 870 | else |
| 871 | { |
| 872 | best_above = string_char_byte_cache_charpos; |
| 873 | best_above_byte = string_char_byte_cache_bytepos; |
| 874 | } |
| 875 | } |
| 876 | |
| 877 | if (char_index - best_below < best_above - char_index) |
| 878 | { |
| 879 | while (best_below < char_index) |
| 880 | { |
| 881 | int c; |
| 882 | FETCH_STRING_CHAR_ADVANCE_NO_CHECK (c, string, |
| 883 | best_below, best_below_byte); |
| 884 | } |
| 885 | i = best_below; |
| 886 | i_byte = best_below_byte; |
| 887 | } |
| 888 | else |
| 889 | { |
| 890 | while (best_above > char_index) |
| 891 | { |
| 892 | unsigned char *pend = SDATA (string) + best_above_byte; |
| 893 | unsigned char *pbeg = pend - best_above_byte; |
| 894 | unsigned char *p = pend - 1; |
| 895 | int bytes; |
| 896 | |
| 897 | while (p > pbeg && !CHAR_HEAD_P (*p)) p--; |
| 898 | PARSE_MULTIBYTE_SEQ (p, pend - p, bytes); |
| 899 | if (bytes == pend - p) |
| 900 | best_above_byte -= bytes; |
| 901 | else if (bytes > pend - p) |
| 902 | best_above_byte -= (pend - p); |
| 903 | else |
| 904 | best_above_byte--; |
| 905 | best_above--; |
| 906 | } |
| 907 | i = best_above; |
| 908 | i_byte = best_above_byte; |
| 909 | } |
| 910 | |
| 911 | string_char_byte_cache_bytepos = i_byte; |
| 912 | string_char_byte_cache_charpos = i; |
| 913 | string_char_byte_cache_string = string; |
| 914 | |
| 915 | return i_byte; |
| 916 | } |
| 917 | \f |
| 918 | /* Return the character index corresponding to BYTE_INDEX in STRING. */ |
| 919 | |
| 920 | int |
| 921 | string_byte_to_char (string, byte_index) |
| 922 | Lisp_Object string; |
| 923 | int byte_index; |
| 924 | { |
| 925 | int i, i_byte; |
| 926 | int best_below, best_below_byte; |
| 927 | int best_above, best_above_byte; |
| 928 | |
| 929 | best_below = best_below_byte = 0; |
| 930 | best_above = SCHARS (string); |
| 931 | best_above_byte = SBYTES (string); |
| 932 | if (best_above == best_above_byte) |
| 933 | return byte_index; |
| 934 | |
| 935 | if (EQ (string, string_char_byte_cache_string)) |
| 936 | { |
| 937 | if (string_char_byte_cache_bytepos < byte_index) |
| 938 | { |
| 939 | best_below = string_char_byte_cache_charpos; |
| 940 | best_below_byte = string_char_byte_cache_bytepos; |
| 941 | } |
| 942 | else |
| 943 | { |
| 944 | best_above = string_char_byte_cache_charpos; |
| 945 | best_above_byte = string_char_byte_cache_bytepos; |
| 946 | } |
| 947 | } |
| 948 | |
| 949 | if (byte_index - best_below_byte < best_above_byte - byte_index) |
| 950 | { |
| 951 | while (best_below_byte < byte_index) |
| 952 | { |
| 953 | int c; |
| 954 | FETCH_STRING_CHAR_ADVANCE_NO_CHECK (c, string, |
| 955 | best_below, best_below_byte); |
| 956 | } |
| 957 | i = best_below; |
| 958 | i_byte = best_below_byte; |
| 959 | } |
| 960 | else |
| 961 | { |
| 962 | while (best_above_byte > byte_index) |
| 963 | { |
| 964 | unsigned char *pend = SDATA (string) + best_above_byte; |
| 965 | unsigned char *pbeg = pend - best_above_byte; |
| 966 | unsigned char *p = pend - 1; |
| 967 | int bytes; |
| 968 | |
| 969 | while (p > pbeg && !CHAR_HEAD_P (*p)) p--; |
| 970 | PARSE_MULTIBYTE_SEQ (p, pend - p, bytes); |
| 971 | if (bytes == pend - p) |
| 972 | best_above_byte -= bytes; |
| 973 | else if (bytes > pend - p) |
| 974 | best_above_byte -= (pend - p); |
| 975 | else |
| 976 | best_above_byte--; |
| 977 | best_above--; |
| 978 | } |
| 979 | i = best_above; |
| 980 | i_byte = best_above_byte; |
| 981 | } |
| 982 | |
| 983 | string_char_byte_cache_bytepos = i_byte; |
| 984 | string_char_byte_cache_charpos = i; |
| 985 | string_char_byte_cache_string = string; |
| 986 | |
| 987 | return i; |
| 988 | } |
| 989 | \f |
| 990 | /* Convert STRING to a multibyte string. |
| 991 | Single-byte characters 0240 through 0377 are converted |
| 992 | by adding nonascii_insert_offset to each. */ |
| 993 | |
| 994 | Lisp_Object |
| 995 | string_make_multibyte (string) |
| 996 | Lisp_Object string; |
| 997 | { |
| 998 | unsigned char *buf; |
| 999 | int nbytes; |
| 1000 | Lisp_Object ret; |
| 1001 | USE_SAFE_ALLOCA; |
| 1002 | |
| 1003 | if (STRING_MULTIBYTE (string)) |
| 1004 | return string; |
| 1005 | |
| 1006 | nbytes = count_size_as_multibyte (SDATA (string), |
| 1007 | SCHARS (string)); |
| 1008 | /* If all the chars are ASCII, they won't need any more bytes |
| 1009 | once converted. In that case, we can return STRING itself. */ |
| 1010 | if (nbytes == SBYTES (string)) |
| 1011 | return string; |
| 1012 | |
| 1013 | SAFE_ALLOCA (buf, unsigned char *, nbytes); |
| 1014 | copy_text (SDATA (string), buf, SBYTES (string), |
| 1015 | 0, 1); |
| 1016 | |
| 1017 | ret = make_multibyte_string (buf, SCHARS (string), nbytes); |
| 1018 | SAFE_FREE (); |
| 1019 | |
| 1020 | return ret; |
| 1021 | } |
| 1022 | |
| 1023 | |
| 1024 | /* Convert STRING to a multibyte string without changing each |
| 1025 | character codes. Thus, characters 0200 trough 0237 are converted |
| 1026 | to eight-bit-control characters, and characters 0240 through 0377 |
| 1027 | are converted eight-bit-graphic characters. */ |
| 1028 | |
| 1029 | Lisp_Object |
| 1030 | string_to_multibyte (string) |
| 1031 | Lisp_Object string; |
| 1032 | { |
| 1033 | unsigned char *buf; |
| 1034 | int nbytes; |
| 1035 | Lisp_Object ret; |
| 1036 | USE_SAFE_ALLOCA; |
| 1037 | |
| 1038 | if (STRING_MULTIBYTE (string)) |
| 1039 | return string; |
| 1040 | |
| 1041 | nbytes = parse_str_to_multibyte (SDATA (string), SBYTES (string)); |
| 1042 | /* If all the chars are ASCII or eight-bit-graphic, they won't need |
| 1043 | any more bytes once converted. */ |
| 1044 | if (nbytes == SBYTES (string)) |
| 1045 | return make_multibyte_string (SDATA (string), nbytes, nbytes); |
| 1046 | |
| 1047 | SAFE_ALLOCA (buf, unsigned char *, nbytes); |
| 1048 | bcopy (SDATA (string), buf, SBYTES (string)); |
| 1049 | str_to_multibyte (buf, nbytes, SBYTES (string)); |
| 1050 | |
| 1051 | ret = make_multibyte_string (buf, SCHARS (string), nbytes); |
| 1052 | SAFE_FREE (); |
| 1053 | |
| 1054 | return ret; |
| 1055 | } |
| 1056 | |
| 1057 | |
| 1058 | /* Convert STRING to a single-byte string. */ |
| 1059 | |
| 1060 | Lisp_Object |
| 1061 | string_make_unibyte (string) |
| 1062 | Lisp_Object string; |
| 1063 | { |
| 1064 | int nchars; |
| 1065 | unsigned char *buf; |
| 1066 | Lisp_Object ret; |
| 1067 | USE_SAFE_ALLOCA; |
| 1068 | |
| 1069 | if (! STRING_MULTIBYTE (string)) |
| 1070 | return string; |
| 1071 | |
| 1072 | nchars = SCHARS (string); |
| 1073 | |
| 1074 | SAFE_ALLOCA (buf, unsigned char *, nchars); |
| 1075 | copy_text (SDATA (string), buf, SBYTES (string), |
| 1076 | 1, 0); |
| 1077 | |
| 1078 | ret = make_unibyte_string (buf, nchars); |
| 1079 | SAFE_FREE (); |
| 1080 | |
| 1081 | return ret; |
| 1082 | } |
| 1083 | |
| 1084 | DEFUN ("string-make-multibyte", Fstring_make_multibyte, Sstring_make_multibyte, |
| 1085 | 1, 1, 0, |
| 1086 | doc: /* Return the multibyte equivalent of STRING. |
| 1087 | If STRING is unibyte and contains non-ASCII characters, the function |
| 1088 | `unibyte-char-to-multibyte' is used to convert each unibyte character |
| 1089 | to a multibyte character. In this case, the returned string is a |
| 1090 | newly created string with no text properties. If STRING is multibyte |
| 1091 | or entirely ASCII, it is returned unchanged. In particular, when |
| 1092 | STRING is unibyte and entirely ASCII, the returned string is unibyte. |
| 1093 | \(When the characters are all ASCII, Emacs primitives will treat the |
| 1094 | string the same way whether it is unibyte or multibyte.) */) |
| 1095 | (string) |
| 1096 | Lisp_Object string; |
| 1097 | { |
| 1098 | CHECK_STRING (string); |
| 1099 | |
| 1100 | return string_make_multibyte (string); |
| 1101 | } |
| 1102 | |
| 1103 | DEFUN ("string-make-unibyte", Fstring_make_unibyte, Sstring_make_unibyte, |
| 1104 | 1, 1, 0, |
| 1105 | doc: /* Return the unibyte equivalent of STRING. |
| 1106 | Multibyte character codes are converted to unibyte according to |
| 1107 | `nonascii-translation-table' or, if that is nil, `nonascii-insert-offset'. |
| 1108 | If the lookup in the translation table fails, this function takes just |
| 1109 | the low 8 bits of each character. */) |
| 1110 | (string) |
| 1111 | Lisp_Object string; |
| 1112 | { |
| 1113 | CHECK_STRING (string); |
| 1114 | |
| 1115 | return string_make_unibyte (string); |
| 1116 | } |
| 1117 | |
| 1118 | DEFUN ("string-as-unibyte", Fstring_as_unibyte, Sstring_as_unibyte, |
| 1119 | 1, 1, 0, |
| 1120 | doc: /* Return a unibyte string with the same individual bytes as STRING. |
| 1121 | If STRING is unibyte, the result is STRING itself. |
| 1122 | Otherwise it is a newly created string, with no text properties. |
| 1123 | If STRING is multibyte and contains a character of charset |
| 1124 | `eight-bit-control' or `eight-bit-graphic', it is converted to the |
| 1125 | corresponding single byte. */) |
| 1126 | (string) |
| 1127 | Lisp_Object string; |
| 1128 | { |
| 1129 | CHECK_STRING (string); |
| 1130 | |
| 1131 | if (STRING_MULTIBYTE (string)) |
| 1132 | { |
| 1133 | int bytes = SBYTES (string); |
| 1134 | unsigned char *str = (unsigned char *) xmalloc (bytes); |
| 1135 | |
| 1136 | bcopy (SDATA (string), str, bytes); |
| 1137 | bytes = str_as_unibyte (str, bytes); |
| 1138 | string = make_unibyte_string (str, bytes); |
| 1139 | xfree (str); |
| 1140 | } |
| 1141 | return string; |
| 1142 | } |
| 1143 | |
| 1144 | DEFUN ("string-as-multibyte", Fstring_as_multibyte, Sstring_as_multibyte, |
| 1145 | 1, 1, 0, |
| 1146 | doc: /* Return a multibyte string with the same individual bytes as STRING. |
| 1147 | If STRING is multibyte, the result is STRING itself. |
| 1148 | Otherwise it is a newly created string, with no text properties. |
| 1149 | If STRING is unibyte and contains an individual 8-bit byte (i.e. not |
| 1150 | part of a multibyte form), it is converted to the corresponding |
| 1151 | multibyte character of charset `eight-bit-control' or `eight-bit-graphic'. |
| 1152 | Beware, this often doesn't really do what you think it does. |
| 1153 | It is similar to (decode-coding-string STRING 'emacs-mule-unix). |
| 1154 | If you're not sure, whether to use `string-as-multibyte' or |
| 1155 | `string-to-multibyte', use `string-to-multibyte'. Beware: |
| 1156 | (aref (string-as-multibyte "\201") 0) -> 129 (aka ?\201) |
| 1157 | (aref (string-as-multibyte "\300") 0) -> 192 (aka ?\300) |
| 1158 | (aref (string-as-multibyte "\300\201") 0) -> 192 (aka ?\300) |
| 1159 | (aref (string-as-multibyte "\300\201") 1) -> 129 (aka ?\201) |
| 1160 | but |
| 1161 | (aref (string-as-multibyte "\201\300") 0) -> 2240 |
| 1162 | (aref (string-as-multibyte "\201\300") 1) -> <error> */) |
| 1163 | (string) |
| 1164 | Lisp_Object string; |
| 1165 | { |
| 1166 | CHECK_STRING (string); |
| 1167 | |
| 1168 | if (! STRING_MULTIBYTE (string)) |
| 1169 | { |
| 1170 | Lisp_Object new_string; |
| 1171 | int nchars, nbytes; |
| 1172 | |
| 1173 | parse_str_as_multibyte (SDATA (string), |
| 1174 | SBYTES (string), |
| 1175 | &nchars, &nbytes); |
| 1176 | new_string = make_uninit_multibyte_string (nchars, nbytes); |
| 1177 | bcopy (SDATA (string), SDATA (new_string), |
| 1178 | SBYTES (string)); |
| 1179 | if (nbytes != SBYTES (string)) |
| 1180 | str_as_multibyte (SDATA (new_string), nbytes, |
| 1181 | SBYTES (string), NULL); |
| 1182 | string = new_string; |
| 1183 | STRING_SET_INTERVALS (string, NULL_INTERVAL); |
| 1184 | } |
| 1185 | return string; |
| 1186 | } |
| 1187 | |
| 1188 | DEFUN ("string-to-multibyte", Fstring_to_multibyte, Sstring_to_multibyte, |
| 1189 | 1, 1, 0, |
| 1190 | doc: /* Return a multibyte string with the same individual chars as STRING. |
| 1191 | If STRING is multibyte, the result is STRING itself. |
| 1192 | Otherwise it is a newly created string, with no text properties. |
| 1193 | Characters 0200 through 0237 are converted to eight-bit-control |
| 1194 | characters of the same character code. Characters 0240 through 0377 |
| 1195 | are converted to eight-bit-graphic characters of the same character |
| 1196 | codes. |
| 1197 | This is similar to (decode-coding-string STRING 'binary) */) |
| 1198 | (string) |
| 1199 | Lisp_Object string; |
| 1200 | { |
| 1201 | CHECK_STRING (string); |
| 1202 | |
| 1203 | return string_to_multibyte (string); |
| 1204 | } |
| 1205 | |
| 1206 | \f |
| 1207 | DEFUN ("copy-alist", Fcopy_alist, Scopy_alist, 1, 1, 0, |
| 1208 | doc: /* Return a copy of ALIST. |
| 1209 | This is an alist which represents the same mapping from objects to objects, |
| 1210 | but does not share the alist structure with ALIST. |
| 1211 | The objects mapped (cars and cdrs of elements of the alist) |
| 1212 | are shared, however. |
| 1213 | Elements of ALIST that are not conses are also shared. */) |
| 1214 | (alist) |
| 1215 | Lisp_Object alist; |
| 1216 | { |
| 1217 | register Lisp_Object tem; |
| 1218 | |
| 1219 | CHECK_LIST (alist); |
| 1220 | if (NILP (alist)) |
| 1221 | return alist; |
| 1222 | alist = concat (1, &alist, Lisp_Cons, 0); |
| 1223 | for (tem = alist; CONSP (tem); tem = XCDR (tem)) |
| 1224 | { |
| 1225 | register Lisp_Object car; |
| 1226 | car = XCAR (tem); |
| 1227 | |
| 1228 | if (CONSP (car)) |
| 1229 | XSETCAR (tem, Fcons (XCAR (car), XCDR (car))); |
| 1230 | } |
| 1231 | return alist; |
| 1232 | } |
| 1233 | |
| 1234 | DEFUN ("substring", Fsubstring, Ssubstring, 2, 3, 0, |
| 1235 | doc: /* Return a substring of STRING, starting at index FROM and ending before TO. |
| 1236 | TO may be nil or omitted; then the substring runs to the end of STRING. |
| 1237 | FROM and TO start at 0. If either is negative, it counts from the end. |
| 1238 | |
| 1239 | This function allows vectors as well as strings. */) |
| 1240 | (string, from, to) |
| 1241 | Lisp_Object string; |
| 1242 | register Lisp_Object from, to; |
| 1243 | { |
| 1244 | Lisp_Object res; |
| 1245 | int size; |
| 1246 | int size_byte = 0; |
| 1247 | int from_char, to_char; |
| 1248 | int from_byte = 0, to_byte = 0; |
| 1249 | |
| 1250 | if (! (STRINGP (string) || VECTORP (string))) |
| 1251 | wrong_type_argument (Qarrayp, string); |
| 1252 | |
| 1253 | CHECK_NUMBER (from); |
| 1254 | |
| 1255 | if (STRINGP (string)) |
| 1256 | { |
| 1257 | size = SCHARS (string); |
| 1258 | size_byte = SBYTES (string); |
| 1259 | } |
| 1260 | else |
| 1261 | size = XVECTOR (string)->size; |
| 1262 | |
| 1263 | if (NILP (to)) |
| 1264 | { |
| 1265 | to_char = size; |
| 1266 | to_byte = size_byte; |
| 1267 | } |
| 1268 | else |
| 1269 | { |
| 1270 | CHECK_NUMBER (to); |
| 1271 | |
| 1272 | to_char = XINT (to); |
| 1273 | if (to_char < 0) |
| 1274 | to_char += size; |
| 1275 | |
| 1276 | if (STRINGP (string)) |
| 1277 | to_byte = string_char_to_byte (string, to_char); |
| 1278 | } |
| 1279 | |
| 1280 | from_char = XINT (from); |
| 1281 | if (from_char < 0) |
| 1282 | from_char += size; |
| 1283 | if (STRINGP (string)) |
| 1284 | from_byte = string_char_to_byte (string, from_char); |
| 1285 | |
| 1286 | if (!(0 <= from_char && from_char <= to_char && to_char <= size)) |
| 1287 | args_out_of_range_3 (string, make_number (from_char), |
| 1288 | make_number (to_char)); |
| 1289 | |
| 1290 | if (STRINGP (string)) |
| 1291 | { |
| 1292 | res = make_specified_string (SDATA (string) + from_byte, |
| 1293 | to_char - from_char, to_byte - from_byte, |
| 1294 | STRING_MULTIBYTE (string)); |
| 1295 | copy_text_properties (make_number (from_char), make_number (to_char), |
| 1296 | string, make_number (0), res, Qnil); |
| 1297 | } |
| 1298 | else |
| 1299 | res = Fvector (to_char - from_char, |
| 1300 | XVECTOR (string)->contents + from_char); |
| 1301 | |
| 1302 | return res; |
| 1303 | } |
| 1304 | |
| 1305 | |
| 1306 | DEFUN ("substring-no-properties", Fsubstring_no_properties, Ssubstring_no_properties, 1, 3, 0, |
| 1307 | doc: /* Return a substring of STRING, without text properties. |
| 1308 | It starts at index FROM and ending before TO. |
| 1309 | TO may be nil or omitted; then the substring runs to the end of STRING. |
| 1310 | If FROM is nil or omitted, the substring starts at the beginning of STRING. |
| 1311 | If FROM or TO is negative, it counts from the end. |
| 1312 | |
| 1313 | With one argument, just copy STRING without its properties. */) |
| 1314 | (string, from, to) |
| 1315 | Lisp_Object string; |
| 1316 | register Lisp_Object from, to; |
| 1317 | { |
| 1318 | int size, size_byte; |
| 1319 | int from_char, to_char; |
| 1320 | int from_byte, to_byte; |
| 1321 | |
| 1322 | CHECK_STRING (string); |
| 1323 | |
| 1324 | size = SCHARS (string); |
| 1325 | size_byte = SBYTES (string); |
| 1326 | |
| 1327 | if (NILP (from)) |
| 1328 | from_char = from_byte = 0; |
| 1329 | else |
| 1330 | { |
| 1331 | CHECK_NUMBER (from); |
| 1332 | from_char = XINT (from); |
| 1333 | if (from_char < 0) |
| 1334 | from_char += size; |
| 1335 | |
| 1336 | from_byte = string_char_to_byte (string, from_char); |
| 1337 | } |
| 1338 | |
| 1339 | if (NILP (to)) |
| 1340 | { |
| 1341 | to_char = size; |
| 1342 | to_byte = size_byte; |
| 1343 | } |
| 1344 | else |
| 1345 | { |
| 1346 | CHECK_NUMBER (to); |
| 1347 | |
| 1348 | to_char = XINT (to); |
| 1349 | if (to_char < 0) |
| 1350 | to_char += size; |
| 1351 | |
| 1352 | to_byte = string_char_to_byte (string, to_char); |
| 1353 | } |
| 1354 | |
| 1355 | if (!(0 <= from_char && from_char <= to_char && to_char <= size)) |
| 1356 | args_out_of_range_3 (string, make_number (from_char), |
| 1357 | make_number (to_char)); |
| 1358 | |
| 1359 | return make_specified_string (SDATA (string) + from_byte, |
| 1360 | to_char - from_char, to_byte - from_byte, |
| 1361 | STRING_MULTIBYTE (string)); |
| 1362 | } |
| 1363 | |
| 1364 | /* Extract a substring of STRING, giving start and end positions |
| 1365 | both in characters and in bytes. */ |
| 1366 | |
| 1367 | Lisp_Object |
| 1368 | substring_both (string, from, from_byte, to, to_byte) |
| 1369 | Lisp_Object string; |
| 1370 | int from, from_byte, to, to_byte; |
| 1371 | { |
| 1372 | Lisp_Object res; |
| 1373 | int size; |
| 1374 | int size_byte; |
| 1375 | |
| 1376 | if (! (STRINGP (string) || VECTORP (string))) |
| 1377 | wrong_type_argument (Qarrayp, string); |
| 1378 | |
| 1379 | if (STRINGP (string)) |
| 1380 | { |
| 1381 | size = SCHARS (string); |
| 1382 | size_byte = SBYTES (string); |
| 1383 | } |
| 1384 | else |
| 1385 | size = XVECTOR (string)->size; |
| 1386 | |
| 1387 | if (!(0 <= from && from <= to && to <= size)) |
| 1388 | args_out_of_range_3 (string, make_number (from), make_number (to)); |
| 1389 | |
| 1390 | if (STRINGP (string)) |
| 1391 | { |
| 1392 | res = make_specified_string (SDATA (string) + from_byte, |
| 1393 | to - from, to_byte - from_byte, |
| 1394 | STRING_MULTIBYTE (string)); |
| 1395 | copy_text_properties (make_number (from), make_number (to), |
| 1396 | string, make_number (0), res, Qnil); |
| 1397 | } |
| 1398 | else |
| 1399 | res = Fvector (to - from, |
| 1400 | XVECTOR (string)->contents + from); |
| 1401 | |
| 1402 | return res; |
| 1403 | } |
| 1404 | \f |
| 1405 | DEFUN ("nthcdr", Fnthcdr, Snthcdr, 2, 2, 0, |
| 1406 | doc: /* Take cdr N times on LIST, returns the result. */) |
| 1407 | (n, list) |
| 1408 | Lisp_Object n; |
| 1409 | register Lisp_Object list; |
| 1410 | { |
| 1411 | register int i, num; |
| 1412 | CHECK_NUMBER (n); |
| 1413 | num = XINT (n); |
| 1414 | for (i = 0; i < num && !NILP (list); i++) |
| 1415 | { |
| 1416 | QUIT; |
| 1417 | if (! CONSP (list)) |
| 1418 | wrong_type_argument (Qlistp, list); |
| 1419 | list = XCDR (list); |
| 1420 | } |
| 1421 | return list; |
| 1422 | } |
| 1423 | |
| 1424 | DEFUN ("nth", Fnth, Snth, 2, 2, 0, |
| 1425 | doc: /* Return the Nth element of LIST. |
| 1426 | N counts from zero. If LIST is not that long, nil is returned. */) |
| 1427 | (n, list) |
| 1428 | Lisp_Object n, list; |
| 1429 | { |
| 1430 | return Fcar (Fnthcdr (n, list)); |
| 1431 | } |
| 1432 | |
| 1433 | DEFUN ("elt", Felt, Selt, 2, 2, 0, |
| 1434 | doc: /* Return element of SEQUENCE at index N. */) |
| 1435 | (sequence, n) |
| 1436 | register Lisp_Object sequence, n; |
| 1437 | { |
| 1438 | CHECK_NUMBER (n); |
| 1439 | while (1) |
| 1440 | { |
| 1441 | if (CONSP (sequence) || NILP (sequence)) |
| 1442 | return Fcar (Fnthcdr (n, sequence)); |
| 1443 | else if (STRINGP (sequence) || VECTORP (sequence) |
| 1444 | || BOOL_VECTOR_P (sequence) || CHAR_TABLE_P (sequence)) |
| 1445 | return Faref (sequence, n); |
| 1446 | else |
| 1447 | sequence = wrong_type_argument (Qsequencep, sequence); |
| 1448 | } |
| 1449 | } |
| 1450 | |
| 1451 | DEFUN ("member", Fmember, Smember, 2, 2, 0, |
| 1452 | doc: /* Return non-nil if ELT is an element of LIST. Comparison done with `equal'. |
| 1453 | The value is actually the tail of LIST whose car is ELT. */) |
| 1454 | (elt, list) |
| 1455 | register Lisp_Object elt; |
| 1456 | Lisp_Object list; |
| 1457 | { |
| 1458 | register Lisp_Object tail; |
| 1459 | for (tail = list; !NILP (tail); tail = XCDR (tail)) |
| 1460 | { |
| 1461 | register Lisp_Object tem; |
| 1462 | if (! CONSP (tail)) |
| 1463 | wrong_type_argument (Qlistp, list); |
| 1464 | tem = XCAR (tail); |
| 1465 | if (! NILP (Fequal (elt, tem))) |
| 1466 | return tail; |
| 1467 | QUIT; |
| 1468 | } |
| 1469 | return Qnil; |
| 1470 | } |
| 1471 | |
| 1472 | DEFUN ("memq", Fmemq, Smemq, 2, 2, 0, |
| 1473 | doc: /* Return non-nil if ELT is an element of LIST. |
| 1474 | Comparison done with EQ. The value is actually the tail of LIST |
| 1475 | whose car is ELT. */) |
| 1476 | (elt, list) |
| 1477 | Lisp_Object elt, list; |
| 1478 | { |
| 1479 | while (1) |
| 1480 | { |
| 1481 | if (!CONSP (list) || EQ (XCAR (list), elt)) |
| 1482 | break; |
| 1483 | |
| 1484 | list = XCDR (list); |
| 1485 | if (!CONSP (list) || EQ (XCAR (list), elt)) |
| 1486 | break; |
| 1487 | |
| 1488 | list = XCDR (list); |
| 1489 | if (!CONSP (list) || EQ (XCAR (list), elt)) |
| 1490 | break; |
| 1491 | |
| 1492 | list = XCDR (list); |
| 1493 | QUIT; |
| 1494 | } |
| 1495 | |
| 1496 | if (!CONSP (list) && !NILP (list)) |
| 1497 | list = wrong_type_argument (Qlistp, list); |
| 1498 | |
| 1499 | return list; |
| 1500 | } |
| 1501 | |
| 1502 | DEFUN ("assq", Fassq, Sassq, 2, 2, 0, |
| 1503 | doc: /* Return non-nil if KEY is `eq' to the car of an element of LIST. |
| 1504 | The value is actually the first element of LIST whose car is KEY. |
| 1505 | Elements of LIST that are not conses are ignored. */) |
| 1506 | (key, list) |
| 1507 | Lisp_Object key, list; |
| 1508 | { |
| 1509 | Lisp_Object result; |
| 1510 | |
| 1511 | while (1) |
| 1512 | { |
| 1513 | if (!CONSP (list) |
| 1514 | || (CONSP (XCAR (list)) |
| 1515 | && EQ (XCAR (XCAR (list)), key))) |
| 1516 | break; |
| 1517 | |
| 1518 | list = XCDR (list); |
| 1519 | if (!CONSP (list) |
| 1520 | || (CONSP (XCAR (list)) |
| 1521 | && EQ (XCAR (XCAR (list)), key))) |
| 1522 | break; |
| 1523 | |
| 1524 | list = XCDR (list); |
| 1525 | if (!CONSP (list) |
| 1526 | || (CONSP (XCAR (list)) |
| 1527 | && EQ (XCAR (XCAR (list)), key))) |
| 1528 | break; |
| 1529 | |
| 1530 | list = XCDR (list); |
| 1531 | QUIT; |
| 1532 | } |
| 1533 | |
| 1534 | if (CONSP (list)) |
| 1535 | result = XCAR (list); |
| 1536 | else if (NILP (list)) |
| 1537 | result = Qnil; |
| 1538 | else |
| 1539 | result = wrong_type_argument (Qlistp, list); |
| 1540 | |
| 1541 | return result; |
| 1542 | } |
| 1543 | |
| 1544 | /* Like Fassq but never report an error and do not allow quits. |
| 1545 | Use only on lists known never to be circular. */ |
| 1546 | |
| 1547 | Lisp_Object |
| 1548 | assq_no_quit (key, list) |
| 1549 | Lisp_Object key, list; |
| 1550 | { |
| 1551 | while (CONSP (list) |
| 1552 | && (!CONSP (XCAR (list)) |
| 1553 | || !EQ (XCAR (XCAR (list)), key))) |
| 1554 | list = XCDR (list); |
| 1555 | |
| 1556 | return CONSP (list) ? XCAR (list) : Qnil; |
| 1557 | } |
| 1558 | |
| 1559 | DEFUN ("assoc", Fassoc, Sassoc, 2, 2, 0, |
| 1560 | doc: /* Return non-nil if KEY is `equal' to the car of an element of LIST. |
| 1561 | The value is actually the first element of LIST whose car equals KEY. */) |
| 1562 | (key, list) |
| 1563 | Lisp_Object key, list; |
| 1564 | { |
| 1565 | Lisp_Object result, car; |
| 1566 | |
| 1567 | while (1) |
| 1568 | { |
| 1569 | if (!CONSP (list) |
| 1570 | || (CONSP (XCAR (list)) |
| 1571 | && (car = XCAR (XCAR (list)), |
| 1572 | EQ (car, key) || !NILP (Fequal (car, key))))) |
| 1573 | break; |
| 1574 | |
| 1575 | list = XCDR (list); |
| 1576 | if (!CONSP (list) |
| 1577 | || (CONSP (XCAR (list)) |
| 1578 | && (car = XCAR (XCAR (list)), |
| 1579 | EQ (car, key) || !NILP (Fequal (car, key))))) |
| 1580 | break; |
| 1581 | |
| 1582 | list = XCDR (list); |
| 1583 | if (!CONSP (list) |
| 1584 | || (CONSP (XCAR (list)) |
| 1585 | && (car = XCAR (XCAR (list)), |
| 1586 | EQ (car, key) || !NILP (Fequal (car, key))))) |
| 1587 | break; |
| 1588 | |
| 1589 | list = XCDR (list); |
| 1590 | QUIT; |
| 1591 | } |
| 1592 | |
| 1593 | if (CONSP (list)) |
| 1594 | result = XCAR (list); |
| 1595 | else if (NILP (list)) |
| 1596 | result = Qnil; |
| 1597 | else |
| 1598 | result = wrong_type_argument (Qlistp, list); |
| 1599 | |
| 1600 | return result; |
| 1601 | } |
| 1602 | |
| 1603 | DEFUN ("rassq", Frassq, Srassq, 2, 2, 0, |
| 1604 | doc: /* Return non-nil if KEY is `eq' to the cdr of an element of LIST. |
| 1605 | The value is actually the first element of LIST whose cdr is KEY. */) |
| 1606 | (key, list) |
| 1607 | register Lisp_Object key; |
| 1608 | Lisp_Object list; |
| 1609 | { |
| 1610 | Lisp_Object result; |
| 1611 | |
| 1612 | while (1) |
| 1613 | { |
| 1614 | if (!CONSP (list) |
| 1615 | || (CONSP (XCAR (list)) |
| 1616 | && EQ (XCDR (XCAR (list)), key))) |
| 1617 | break; |
| 1618 | |
| 1619 | list = XCDR (list); |
| 1620 | if (!CONSP (list) |
| 1621 | || (CONSP (XCAR (list)) |
| 1622 | && EQ (XCDR (XCAR (list)), key))) |
| 1623 | break; |
| 1624 | |
| 1625 | list = XCDR (list); |
| 1626 | if (!CONSP (list) |
| 1627 | || (CONSP (XCAR (list)) |
| 1628 | && EQ (XCDR (XCAR (list)), key))) |
| 1629 | break; |
| 1630 | |
| 1631 | list = XCDR (list); |
| 1632 | QUIT; |
| 1633 | } |
| 1634 | |
| 1635 | if (NILP (list)) |
| 1636 | result = Qnil; |
| 1637 | else if (CONSP (list)) |
| 1638 | result = XCAR (list); |
| 1639 | else |
| 1640 | result = wrong_type_argument (Qlistp, list); |
| 1641 | |
| 1642 | return result; |
| 1643 | } |
| 1644 | |
| 1645 | DEFUN ("rassoc", Frassoc, Srassoc, 2, 2, 0, |
| 1646 | doc: /* Return non-nil if KEY is `equal' to the cdr of an element of LIST. |
| 1647 | The value is actually the first element of LIST whose cdr equals KEY. */) |
| 1648 | (key, list) |
| 1649 | Lisp_Object key, list; |
| 1650 | { |
| 1651 | Lisp_Object result, cdr; |
| 1652 | |
| 1653 | while (1) |
| 1654 | { |
| 1655 | if (!CONSP (list) |
| 1656 | || (CONSP (XCAR (list)) |
| 1657 | && (cdr = XCDR (XCAR (list)), |
| 1658 | EQ (cdr, key) || !NILP (Fequal (cdr, key))))) |
| 1659 | break; |
| 1660 | |
| 1661 | list = XCDR (list); |
| 1662 | if (!CONSP (list) |
| 1663 | || (CONSP (XCAR (list)) |
| 1664 | && (cdr = XCDR (XCAR (list)), |
| 1665 | EQ (cdr, key) || !NILP (Fequal (cdr, key))))) |
| 1666 | break; |
| 1667 | |
| 1668 | list = XCDR (list); |
| 1669 | if (!CONSP (list) |
| 1670 | || (CONSP (XCAR (list)) |
| 1671 | && (cdr = XCDR (XCAR (list)), |
| 1672 | EQ (cdr, key) || !NILP (Fequal (cdr, key))))) |
| 1673 | break; |
| 1674 | |
| 1675 | list = XCDR (list); |
| 1676 | QUIT; |
| 1677 | } |
| 1678 | |
| 1679 | if (CONSP (list)) |
| 1680 | result = XCAR (list); |
| 1681 | else if (NILP (list)) |
| 1682 | result = Qnil; |
| 1683 | else |
| 1684 | result = wrong_type_argument (Qlistp, list); |
| 1685 | |
| 1686 | return result; |
| 1687 | } |
| 1688 | \f |
| 1689 | DEFUN ("delq", Fdelq, Sdelq, 2, 2, 0, |
| 1690 | doc: /* Delete by side effect any occurrences of ELT as a member of LIST. |
| 1691 | The modified LIST is returned. Comparison is done with `eq'. |
| 1692 | If the first member of LIST is ELT, there is no way to remove it by side effect; |
| 1693 | therefore, write `(setq foo (delq element foo))' |
| 1694 | to be sure of changing the value of `foo'. */) |
| 1695 | (elt, list) |
| 1696 | register Lisp_Object elt; |
| 1697 | Lisp_Object list; |
| 1698 | { |
| 1699 | register Lisp_Object tail, prev; |
| 1700 | register Lisp_Object tem; |
| 1701 | |
| 1702 | tail = list; |
| 1703 | prev = Qnil; |
| 1704 | while (!NILP (tail)) |
| 1705 | { |
| 1706 | if (! CONSP (tail)) |
| 1707 | wrong_type_argument (Qlistp, list); |
| 1708 | tem = XCAR (tail); |
| 1709 | if (EQ (elt, tem)) |
| 1710 | { |
| 1711 | if (NILP (prev)) |
| 1712 | list = XCDR (tail); |
| 1713 | else |
| 1714 | Fsetcdr (prev, XCDR (tail)); |
| 1715 | } |
| 1716 | else |
| 1717 | prev = tail; |
| 1718 | tail = XCDR (tail); |
| 1719 | QUIT; |
| 1720 | } |
| 1721 | return list; |
| 1722 | } |
| 1723 | |
| 1724 | DEFUN ("delete", Fdelete, Sdelete, 2, 2, 0, |
| 1725 | doc: /* Delete by side effect any occurrences of ELT as a member of SEQ. |
| 1726 | SEQ must be a list, a vector, or a string. |
| 1727 | The modified SEQ is returned. Comparison is done with `equal'. |
| 1728 | If SEQ is not a list, or the first member of SEQ is ELT, deleting it |
| 1729 | is not a side effect; it is simply using a different sequence. |
| 1730 | Therefore, write `(setq foo (delete element foo))' |
| 1731 | to be sure of changing the value of `foo'. */) |
| 1732 | (elt, seq) |
| 1733 | Lisp_Object elt, seq; |
| 1734 | { |
| 1735 | if (VECTORP (seq)) |
| 1736 | { |
| 1737 | EMACS_INT i, n; |
| 1738 | |
| 1739 | for (i = n = 0; i < ASIZE (seq); ++i) |
| 1740 | if (NILP (Fequal (AREF (seq, i), elt))) |
| 1741 | ++n; |
| 1742 | |
| 1743 | if (n != ASIZE (seq)) |
| 1744 | { |
| 1745 | struct Lisp_Vector *p = allocate_vector (n); |
| 1746 | |
| 1747 | for (i = n = 0; i < ASIZE (seq); ++i) |
| 1748 | if (NILP (Fequal (AREF (seq, i), elt))) |
| 1749 | p->contents[n++] = AREF (seq, i); |
| 1750 | |
| 1751 | XSETVECTOR (seq, p); |
| 1752 | } |
| 1753 | } |
| 1754 | else if (STRINGP (seq)) |
| 1755 | { |
| 1756 | EMACS_INT i, ibyte, nchars, nbytes, cbytes; |
| 1757 | int c; |
| 1758 | |
| 1759 | for (i = nchars = nbytes = ibyte = 0; |
| 1760 | i < SCHARS (seq); |
| 1761 | ++i, ibyte += cbytes) |
| 1762 | { |
| 1763 | if (STRING_MULTIBYTE (seq)) |
| 1764 | { |
| 1765 | c = STRING_CHAR (SDATA (seq) + ibyte, |
| 1766 | SBYTES (seq) - ibyte); |
| 1767 | cbytes = CHAR_BYTES (c); |
| 1768 | } |
| 1769 | else |
| 1770 | { |
| 1771 | c = SREF (seq, i); |
| 1772 | cbytes = 1; |
| 1773 | } |
| 1774 | |
| 1775 | if (!INTEGERP (elt) || c != XINT (elt)) |
| 1776 | { |
| 1777 | ++nchars; |
| 1778 | nbytes += cbytes; |
| 1779 | } |
| 1780 | } |
| 1781 | |
| 1782 | if (nchars != SCHARS (seq)) |
| 1783 | { |
| 1784 | Lisp_Object tem; |
| 1785 | |
| 1786 | tem = make_uninit_multibyte_string (nchars, nbytes); |
| 1787 | if (!STRING_MULTIBYTE (seq)) |
| 1788 | STRING_SET_UNIBYTE (tem); |
| 1789 | |
| 1790 | for (i = nchars = nbytes = ibyte = 0; |
| 1791 | i < SCHARS (seq); |
| 1792 | ++i, ibyte += cbytes) |
| 1793 | { |
| 1794 | if (STRING_MULTIBYTE (seq)) |
| 1795 | { |
| 1796 | c = STRING_CHAR (SDATA (seq) + ibyte, |
| 1797 | SBYTES (seq) - ibyte); |
| 1798 | cbytes = CHAR_BYTES (c); |
| 1799 | } |
| 1800 | else |
| 1801 | { |
| 1802 | c = SREF (seq, i); |
| 1803 | cbytes = 1; |
| 1804 | } |
| 1805 | |
| 1806 | if (!INTEGERP (elt) || c != XINT (elt)) |
| 1807 | { |
| 1808 | unsigned char *from = SDATA (seq) + ibyte; |
| 1809 | unsigned char *to = SDATA (tem) + nbytes; |
| 1810 | EMACS_INT n; |
| 1811 | |
| 1812 | ++nchars; |
| 1813 | nbytes += cbytes; |
| 1814 | |
| 1815 | for (n = cbytes; n--; ) |
| 1816 | *to++ = *from++; |
| 1817 | } |
| 1818 | } |
| 1819 | |
| 1820 | seq = tem; |
| 1821 | } |
| 1822 | } |
| 1823 | else |
| 1824 | { |
| 1825 | Lisp_Object tail, prev; |
| 1826 | |
| 1827 | for (tail = seq, prev = Qnil; !NILP (tail); tail = XCDR (tail)) |
| 1828 | { |
| 1829 | if (!CONSP (tail)) |
| 1830 | wrong_type_argument (Qlistp, seq); |
| 1831 | |
| 1832 | if (!NILP (Fequal (elt, XCAR (tail)))) |
| 1833 | { |
| 1834 | if (NILP (prev)) |
| 1835 | seq = XCDR (tail); |
| 1836 | else |
| 1837 | Fsetcdr (prev, XCDR (tail)); |
| 1838 | } |
| 1839 | else |
| 1840 | prev = tail; |
| 1841 | QUIT; |
| 1842 | } |
| 1843 | } |
| 1844 | |
| 1845 | return seq; |
| 1846 | } |
| 1847 | |
| 1848 | DEFUN ("nreverse", Fnreverse, Snreverse, 1, 1, 0, |
| 1849 | doc: /* Reverse LIST by modifying cdr pointers. |
| 1850 | Return the reversed list. */) |
| 1851 | (list) |
| 1852 | Lisp_Object list; |
| 1853 | { |
| 1854 | register Lisp_Object prev, tail, next; |
| 1855 | |
| 1856 | if (NILP (list)) return list; |
| 1857 | prev = Qnil; |
| 1858 | tail = list; |
| 1859 | while (!NILP (tail)) |
| 1860 | { |
| 1861 | QUIT; |
| 1862 | if (! CONSP (tail)) |
| 1863 | wrong_type_argument (Qlistp, list); |
| 1864 | next = XCDR (tail); |
| 1865 | Fsetcdr (tail, prev); |
| 1866 | prev = tail; |
| 1867 | tail = next; |
| 1868 | } |
| 1869 | return prev; |
| 1870 | } |
| 1871 | |
| 1872 | DEFUN ("reverse", Freverse, Sreverse, 1, 1, 0, |
| 1873 | doc: /* Reverse LIST, copying. Return the reversed list. |
| 1874 | See also the function `nreverse', which is used more often. */) |
| 1875 | (list) |
| 1876 | Lisp_Object list; |
| 1877 | { |
| 1878 | Lisp_Object new; |
| 1879 | |
| 1880 | for (new = Qnil; CONSP (list); list = XCDR (list)) |
| 1881 | { |
| 1882 | QUIT; |
| 1883 | new = Fcons (XCAR (list), new); |
| 1884 | } |
| 1885 | if (!NILP (list)) |
| 1886 | wrong_type_argument (Qconsp, list); |
| 1887 | return new; |
| 1888 | } |
| 1889 | \f |
| 1890 | Lisp_Object merge (); |
| 1891 | |
| 1892 | DEFUN ("sort", Fsort, Ssort, 2, 2, 0, |
| 1893 | doc: /* Sort LIST, stably, comparing elements using PREDICATE. |
| 1894 | Returns the sorted list. LIST is modified by side effects. |
| 1895 | PREDICATE is called with two elements of LIST, and should return t |
| 1896 | if the first element is "less" than the second. */) |
| 1897 | (list, predicate) |
| 1898 | Lisp_Object list, predicate; |
| 1899 | { |
| 1900 | Lisp_Object front, back; |
| 1901 | register Lisp_Object len, tem; |
| 1902 | struct gcpro gcpro1, gcpro2; |
| 1903 | register int length; |
| 1904 | |
| 1905 | front = list; |
| 1906 | len = Flength (list); |
| 1907 | length = XINT (len); |
| 1908 | if (length < 2) |
| 1909 | return list; |
| 1910 | |
| 1911 | XSETINT (len, (length / 2) - 1); |
| 1912 | tem = Fnthcdr (len, list); |
| 1913 | back = Fcdr (tem); |
| 1914 | Fsetcdr (tem, Qnil); |
| 1915 | |
| 1916 | GCPRO2 (front, back); |
| 1917 | front = Fsort (front, predicate); |
| 1918 | back = Fsort (back, predicate); |
| 1919 | UNGCPRO; |
| 1920 | return merge (front, back, predicate); |
| 1921 | } |
| 1922 | |
| 1923 | Lisp_Object |
| 1924 | merge (org_l1, org_l2, pred) |
| 1925 | Lisp_Object org_l1, org_l2; |
| 1926 | Lisp_Object pred; |
| 1927 | { |
| 1928 | Lisp_Object value; |
| 1929 | register Lisp_Object tail; |
| 1930 | Lisp_Object tem; |
| 1931 | register Lisp_Object l1, l2; |
| 1932 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4; |
| 1933 | |
| 1934 | l1 = org_l1; |
| 1935 | l2 = org_l2; |
| 1936 | tail = Qnil; |
| 1937 | value = Qnil; |
| 1938 | |
| 1939 | /* It is sufficient to protect org_l1 and org_l2. |
| 1940 | When l1 and l2 are updated, we copy the new values |
| 1941 | back into the org_ vars. */ |
| 1942 | GCPRO4 (org_l1, org_l2, pred, value); |
| 1943 | |
| 1944 | while (1) |
| 1945 | { |
| 1946 | if (NILP (l1)) |
| 1947 | { |
| 1948 | UNGCPRO; |
| 1949 | if (NILP (tail)) |
| 1950 | return l2; |
| 1951 | Fsetcdr (tail, l2); |
| 1952 | return value; |
| 1953 | } |
| 1954 | if (NILP (l2)) |
| 1955 | { |
| 1956 | UNGCPRO; |
| 1957 | if (NILP (tail)) |
| 1958 | return l1; |
| 1959 | Fsetcdr (tail, l1); |
| 1960 | return value; |
| 1961 | } |
| 1962 | tem = call2 (pred, Fcar (l2), Fcar (l1)); |
| 1963 | if (NILP (tem)) |
| 1964 | { |
| 1965 | tem = l1; |
| 1966 | l1 = Fcdr (l1); |
| 1967 | org_l1 = l1; |
| 1968 | } |
| 1969 | else |
| 1970 | { |
| 1971 | tem = l2; |
| 1972 | l2 = Fcdr (l2); |
| 1973 | org_l2 = l2; |
| 1974 | } |
| 1975 | if (NILP (tail)) |
| 1976 | value = tem; |
| 1977 | else |
| 1978 | Fsetcdr (tail, tem); |
| 1979 | tail = tem; |
| 1980 | } |
| 1981 | } |
| 1982 | |
| 1983 | \f |
| 1984 | DEFUN ("plist-get", Fplist_get, Splist_get, 2, 2, 0, |
| 1985 | doc: /* Extract a value from a property list. |
| 1986 | PLIST is a property list, which is a list of the form |
| 1987 | \(PROP1 VALUE1 PROP2 VALUE2...). This function returns the value |
| 1988 | corresponding to the given PROP, or nil if PROP is not |
| 1989 | one of the properties on the list. */) |
| 1990 | (plist, prop) |
| 1991 | Lisp_Object plist; |
| 1992 | Lisp_Object prop; |
| 1993 | { |
| 1994 | Lisp_Object tail; |
| 1995 | |
| 1996 | for (tail = plist; |
| 1997 | CONSP (tail) && CONSP (XCDR (tail)); |
| 1998 | tail = XCDR (XCDR (tail))) |
| 1999 | { |
| 2000 | if (EQ (prop, XCAR (tail))) |
| 2001 | return XCAR (XCDR (tail)); |
| 2002 | |
| 2003 | /* This function can be called asynchronously |
| 2004 | (setup_coding_system). Don't QUIT in that case. */ |
| 2005 | if (!interrupt_input_blocked) |
| 2006 | QUIT; |
| 2007 | } |
| 2008 | |
| 2009 | if (!NILP (tail)) |
| 2010 | wrong_type_argument (Qlistp, prop); |
| 2011 | |
| 2012 | return Qnil; |
| 2013 | } |
| 2014 | |
| 2015 | DEFUN ("safe-plist-get", Fsafe_plist_get, Ssafe_plist_get, 2, 2, 0, |
| 2016 | doc: /* Extract a value from a property list. |
| 2017 | PLIST is a property list, which is a list of the form |
| 2018 | \(PROP1 VALUE1 PROP2 VALUE2...). This function returns the value |
| 2019 | corresponding to the given PROP, or nil if PROP is not |
| 2020 | one of the properties on the list. |
| 2021 | This function never signals an error. */) |
| 2022 | (plist, prop) |
| 2023 | Lisp_Object plist; |
| 2024 | Lisp_Object prop; |
| 2025 | { |
| 2026 | Lisp_Object tail, halftail; |
| 2027 | |
| 2028 | /* halftail is used to detect circular lists. */ |
| 2029 | tail = halftail = plist; |
| 2030 | while (CONSP (tail) && CONSP (XCDR (tail))) |
| 2031 | { |
| 2032 | if (EQ (prop, XCAR (tail))) |
| 2033 | return XCAR (XCDR (tail)); |
| 2034 | |
| 2035 | tail = XCDR (XCDR (tail)); |
| 2036 | halftail = XCDR (halftail); |
| 2037 | if (EQ (tail, halftail)) |
| 2038 | break; |
| 2039 | } |
| 2040 | |
| 2041 | return Qnil; |
| 2042 | } |
| 2043 | |
| 2044 | DEFUN ("get", Fget, Sget, 2, 2, 0, |
| 2045 | doc: /* Return the value of SYMBOL's PROPNAME property. |
| 2046 | This is the last value stored with `(put SYMBOL PROPNAME VALUE)'. */) |
| 2047 | (symbol, propname) |
| 2048 | Lisp_Object symbol, propname; |
| 2049 | { |
| 2050 | CHECK_SYMBOL (symbol); |
| 2051 | return Fplist_get (XSYMBOL (symbol)->plist, propname); |
| 2052 | } |
| 2053 | |
| 2054 | DEFUN ("plist-put", Fplist_put, Splist_put, 3, 3, 0, |
| 2055 | doc: /* Change value in PLIST of PROP to VAL. |
| 2056 | PLIST is a property list, which is a list of the form |
| 2057 | \(PROP1 VALUE1 PROP2 VALUE2 ...). PROP is a symbol and VAL is any object. |
| 2058 | If PROP is already a property on the list, its value is set to VAL, |
| 2059 | otherwise the new PROP VAL pair is added. The new plist is returned; |
| 2060 | use `(setq x (plist-put x prop val))' to be sure to use the new value. |
| 2061 | The PLIST is modified by side effects. */) |
| 2062 | (plist, prop, val) |
| 2063 | Lisp_Object plist; |
| 2064 | register Lisp_Object prop; |
| 2065 | Lisp_Object val; |
| 2066 | { |
| 2067 | register Lisp_Object tail, prev; |
| 2068 | Lisp_Object newcell; |
| 2069 | prev = Qnil; |
| 2070 | for (tail = plist; CONSP (tail) && CONSP (XCDR (tail)); |
| 2071 | tail = XCDR (XCDR (tail))) |
| 2072 | { |
| 2073 | if (EQ (prop, XCAR (tail))) |
| 2074 | { |
| 2075 | Fsetcar (XCDR (tail), val); |
| 2076 | return plist; |
| 2077 | } |
| 2078 | |
| 2079 | prev = tail; |
| 2080 | QUIT; |
| 2081 | } |
| 2082 | newcell = Fcons (prop, Fcons (val, Qnil)); |
| 2083 | if (NILP (prev)) |
| 2084 | return newcell; |
| 2085 | else |
| 2086 | Fsetcdr (XCDR (prev), newcell); |
| 2087 | return plist; |
| 2088 | } |
| 2089 | |
| 2090 | DEFUN ("put", Fput, Sput, 3, 3, 0, |
| 2091 | doc: /* Store SYMBOL's PROPNAME property with value VALUE. |
| 2092 | It can be retrieved with `(get SYMBOL PROPNAME)'. */) |
| 2093 | (symbol, propname, value) |
| 2094 | Lisp_Object symbol, propname, value; |
| 2095 | { |
| 2096 | CHECK_SYMBOL (symbol); |
| 2097 | XSYMBOL (symbol)->plist |
| 2098 | = Fplist_put (XSYMBOL (symbol)->plist, propname, value); |
| 2099 | return value; |
| 2100 | } |
| 2101 | \f |
| 2102 | DEFUN ("lax-plist-get", Flax_plist_get, Slax_plist_get, 2, 2, 0, |
| 2103 | doc: /* Extract a value from a property list, comparing with `equal'. |
| 2104 | PLIST is a property list, which is a list of the form |
| 2105 | \(PROP1 VALUE1 PROP2 VALUE2...). This function returns the value |
| 2106 | corresponding to the given PROP, or nil if PROP is not |
| 2107 | one of the properties on the list. */) |
| 2108 | (plist, prop) |
| 2109 | Lisp_Object plist; |
| 2110 | Lisp_Object prop; |
| 2111 | { |
| 2112 | Lisp_Object tail; |
| 2113 | |
| 2114 | for (tail = plist; |
| 2115 | CONSP (tail) && CONSP (XCDR (tail)); |
| 2116 | tail = XCDR (XCDR (tail))) |
| 2117 | { |
| 2118 | if (! NILP (Fequal (prop, XCAR (tail)))) |
| 2119 | return XCAR (XCDR (tail)); |
| 2120 | |
| 2121 | QUIT; |
| 2122 | } |
| 2123 | |
| 2124 | if (!NILP (tail)) |
| 2125 | wrong_type_argument (Qlistp, prop); |
| 2126 | |
| 2127 | return Qnil; |
| 2128 | } |
| 2129 | |
| 2130 | DEFUN ("lax-plist-put", Flax_plist_put, Slax_plist_put, 3, 3, 0, |
| 2131 | doc: /* Change value in PLIST of PROP to VAL, comparing with `equal'. |
| 2132 | PLIST is a property list, which is a list of the form |
| 2133 | \(PROP1 VALUE1 PROP2 VALUE2 ...). PROP and VAL are any objects. |
| 2134 | If PROP is already a property on the list, its value is set to VAL, |
| 2135 | otherwise the new PROP VAL pair is added. The new plist is returned; |
| 2136 | use `(setq x (lax-plist-put x prop val))' to be sure to use the new value. |
| 2137 | The PLIST is modified by side effects. */) |
| 2138 | (plist, prop, val) |
| 2139 | Lisp_Object plist; |
| 2140 | register Lisp_Object prop; |
| 2141 | Lisp_Object val; |
| 2142 | { |
| 2143 | register Lisp_Object tail, prev; |
| 2144 | Lisp_Object newcell; |
| 2145 | prev = Qnil; |
| 2146 | for (tail = plist; CONSP (tail) && CONSP (XCDR (tail)); |
| 2147 | tail = XCDR (XCDR (tail))) |
| 2148 | { |
| 2149 | if (! NILP (Fequal (prop, XCAR (tail)))) |
| 2150 | { |
| 2151 | Fsetcar (XCDR (tail), val); |
| 2152 | return plist; |
| 2153 | } |
| 2154 | |
| 2155 | prev = tail; |
| 2156 | QUIT; |
| 2157 | } |
| 2158 | newcell = Fcons (prop, Fcons (val, Qnil)); |
| 2159 | if (NILP (prev)) |
| 2160 | return newcell; |
| 2161 | else |
| 2162 | Fsetcdr (XCDR (prev), newcell); |
| 2163 | return plist; |
| 2164 | } |
| 2165 | \f |
| 2166 | DEFUN ("eql", Feql, Seql, 2, 2, 0, |
| 2167 | doc: /* Return t if the two args are the same Lisp object. |
| 2168 | Floating-point numbers of equal value are `eql', but they may not be `eq'. */) |
| 2169 | (obj1, obj2) |
| 2170 | Lisp_Object obj1, obj2; |
| 2171 | { |
| 2172 | if (FLOATP (obj1)) |
| 2173 | return internal_equal (obj1, obj2, 0, 0) ? Qt : Qnil; |
| 2174 | else |
| 2175 | return EQ (obj1, obj2) ? Qt : Qnil; |
| 2176 | } |
| 2177 | |
| 2178 | DEFUN ("equal", Fequal, Sequal, 2, 2, 0, |
| 2179 | doc: /* Return t if two Lisp objects have similar structure and contents. |
| 2180 | They must have the same data type. |
| 2181 | Conses are compared by comparing the cars and the cdrs. |
| 2182 | Vectors and strings are compared element by element. |
| 2183 | Numbers are compared by value, but integers cannot equal floats. |
| 2184 | (Use `=' if you want integers and floats to be able to be equal.) |
| 2185 | Symbols must match exactly. */) |
| 2186 | (o1, o2) |
| 2187 | register Lisp_Object o1, o2; |
| 2188 | { |
| 2189 | return internal_equal (o1, o2, 0, 0) ? Qt : Qnil; |
| 2190 | } |
| 2191 | |
| 2192 | DEFUN ("equal-including-properties", Fequal_including_properties, Sequal_including_properties, 2, 2, 0, |
| 2193 | doc: /* Return t if two Lisp objects have similar structure and contents. |
| 2194 | This is like `equal' except that it compares the text properties |
| 2195 | of strings. (`equal' ignores text properties.) */) |
| 2196 | (o1, o2) |
| 2197 | register Lisp_Object o1, o2; |
| 2198 | { |
| 2199 | return internal_equal (o1, o2, 0, 1) ? Qt : Qnil; |
| 2200 | } |
| 2201 | |
| 2202 | /* DEPTH is current depth of recursion. Signal an error if it |
| 2203 | gets too deep. |
| 2204 | PROPS, if non-nil, means compare string text properties too. */ |
| 2205 | |
| 2206 | static int |
| 2207 | internal_equal (o1, o2, depth, props) |
| 2208 | register Lisp_Object o1, o2; |
| 2209 | int depth, props; |
| 2210 | { |
| 2211 | if (depth > 200) |
| 2212 | error ("Stack overflow in equal"); |
| 2213 | |
| 2214 | tail_recurse: |
| 2215 | QUIT; |
| 2216 | if (EQ (o1, o2)) |
| 2217 | return 1; |
| 2218 | if (XTYPE (o1) != XTYPE (o2)) |
| 2219 | return 0; |
| 2220 | |
| 2221 | switch (XTYPE (o1)) |
| 2222 | { |
| 2223 | case Lisp_Float: |
| 2224 | { |
| 2225 | double d1, d2; |
| 2226 | |
| 2227 | d1 = extract_float (o1); |
| 2228 | d2 = extract_float (o2); |
| 2229 | /* If d is a NaN, then d != d. Two NaNs should be `equal' even |
| 2230 | though they are not =. */ |
| 2231 | return d1 == d2 || (d1 != d1 && d2 != d2); |
| 2232 | } |
| 2233 | |
| 2234 | case Lisp_Cons: |
| 2235 | if (!internal_equal (XCAR (o1), XCAR (o2), depth + 1, props)) |
| 2236 | return 0; |
| 2237 | o1 = XCDR (o1); |
| 2238 | o2 = XCDR (o2); |
| 2239 | goto tail_recurse; |
| 2240 | |
| 2241 | case Lisp_Misc: |
| 2242 | if (XMISCTYPE (o1) != XMISCTYPE (o2)) |
| 2243 | return 0; |
| 2244 | if (OVERLAYP (o1)) |
| 2245 | { |
| 2246 | if (!internal_equal (OVERLAY_START (o1), OVERLAY_START (o2), |
| 2247 | depth + 1, props) |
| 2248 | || !internal_equal (OVERLAY_END (o1), OVERLAY_END (o2), |
| 2249 | depth + 1)) |
| 2250 | return 0; |
| 2251 | o1 = XOVERLAY (o1)->plist; |
| 2252 | o2 = XOVERLAY (o2)->plist; |
| 2253 | goto tail_recurse; |
| 2254 | } |
| 2255 | if (MARKERP (o1)) |
| 2256 | { |
| 2257 | return (XMARKER (o1)->buffer == XMARKER (o2)->buffer |
| 2258 | && (XMARKER (o1)->buffer == 0 |
| 2259 | || XMARKER (o1)->bytepos == XMARKER (o2)->bytepos)); |
| 2260 | } |
| 2261 | break; |
| 2262 | |
| 2263 | case Lisp_Vectorlike: |
| 2264 | { |
| 2265 | register int i; |
| 2266 | EMACS_INT size = XVECTOR (o1)->size; |
| 2267 | /* Pseudovectors have the type encoded in the size field, so this test |
| 2268 | actually checks that the objects have the same type as well as the |
| 2269 | same size. */ |
| 2270 | if (XVECTOR (o2)->size != size) |
| 2271 | return 0; |
| 2272 | /* Boolvectors are compared much like strings. */ |
| 2273 | if (BOOL_VECTOR_P (o1)) |
| 2274 | { |
| 2275 | int size_in_chars |
| 2276 | = ((XBOOL_VECTOR (o1)->size + BOOL_VECTOR_BITS_PER_CHAR - 1) |
| 2277 | / BOOL_VECTOR_BITS_PER_CHAR); |
| 2278 | |
| 2279 | if (XBOOL_VECTOR (o1)->size != XBOOL_VECTOR (o2)->size) |
| 2280 | return 0; |
| 2281 | if (bcmp (XBOOL_VECTOR (o1)->data, XBOOL_VECTOR (o2)->data, |
| 2282 | size_in_chars)) |
| 2283 | return 0; |
| 2284 | return 1; |
| 2285 | } |
| 2286 | if (WINDOW_CONFIGURATIONP (o1)) |
| 2287 | return compare_window_configurations (o1, o2, 0); |
| 2288 | |
| 2289 | /* Aside from them, only true vectors, char-tables, and compiled |
| 2290 | functions are sensible to compare, so eliminate the others now. */ |
| 2291 | if (size & PSEUDOVECTOR_FLAG) |
| 2292 | { |
| 2293 | if (!(size & (PVEC_COMPILED | PVEC_CHAR_TABLE))) |
| 2294 | return 0; |
| 2295 | size &= PSEUDOVECTOR_SIZE_MASK; |
| 2296 | } |
| 2297 | for (i = 0; i < size; i++) |
| 2298 | { |
| 2299 | Lisp_Object v1, v2; |
| 2300 | v1 = XVECTOR (o1)->contents [i]; |
| 2301 | v2 = XVECTOR (o2)->contents [i]; |
| 2302 | if (!internal_equal (v1, v2, depth + 1, props)) |
| 2303 | return 0; |
| 2304 | } |
| 2305 | return 1; |
| 2306 | } |
| 2307 | break; |
| 2308 | |
| 2309 | case Lisp_String: |
| 2310 | if (SCHARS (o1) != SCHARS (o2)) |
| 2311 | return 0; |
| 2312 | if (SBYTES (o1) != SBYTES (o2)) |
| 2313 | return 0; |
| 2314 | if (bcmp (SDATA (o1), SDATA (o2), |
| 2315 | SBYTES (o1))) |
| 2316 | return 0; |
| 2317 | if (props && !compare_string_intervals (o1, o2)) |
| 2318 | return 0; |
| 2319 | return 1; |
| 2320 | |
| 2321 | case Lisp_Int: |
| 2322 | case Lisp_Symbol: |
| 2323 | case Lisp_Type_Limit: |
| 2324 | break; |
| 2325 | } |
| 2326 | |
| 2327 | return 0; |
| 2328 | } |
| 2329 | \f |
| 2330 | extern Lisp_Object Fmake_char_internal (); |
| 2331 | |
| 2332 | DEFUN ("fillarray", Ffillarray, Sfillarray, 2, 2, 0, |
| 2333 | doc: /* Store each element of ARRAY with ITEM. |
| 2334 | ARRAY is a vector, string, char-table, or bool-vector. */) |
| 2335 | (array, item) |
| 2336 | Lisp_Object array, item; |
| 2337 | { |
| 2338 | register int size, index, charval; |
| 2339 | retry: |
| 2340 | if (VECTORP (array)) |
| 2341 | { |
| 2342 | register Lisp_Object *p = XVECTOR (array)->contents; |
| 2343 | size = XVECTOR (array)->size; |
| 2344 | for (index = 0; index < size; index++) |
| 2345 | p[index] = item; |
| 2346 | } |
| 2347 | else if (CHAR_TABLE_P (array)) |
| 2348 | { |
| 2349 | register Lisp_Object *p = XCHAR_TABLE (array)->contents; |
| 2350 | size = CHAR_TABLE_ORDINARY_SLOTS; |
| 2351 | for (index = 0; index < size; index++) |
| 2352 | p[index] = item; |
| 2353 | XCHAR_TABLE (array)->defalt = Qnil; |
| 2354 | } |
| 2355 | else if (STRINGP (array)) |
| 2356 | { |
| 2357 | register unsigned char *p = SDATA (array); |
| 2358 | CHECK_NUMBER (item); |
| 2359 | charval = XINT (item); |
| 2360 | size = SCHARS (array); |
| 2361 | if (STRING_MULTIBYTE (array)) |
| 2362 | { |
| 2363 | unsigned char str[MAX_MULTIBYTE_LENGTH]; |
| 2364 | int len = CHAR_STRING (charval, str); |
| 2365 | int size_byte = SBYTES (array); |
| 2366 | unsigned char *p1 = p, *endp = p + size_byte; |
| 2367 | int i; |
| 2368 | |
| 2369 | if (size != size_byte) |
| 2370 | while (p1 < endp) |
| 2371 | { |
| 2372 | int this_len = MULTIBYTE_FORM_LENGTH (p1, endp - p1); |
| 2373 | if (len != this_len) |
| 2374 | error ("Attempt to change byte length of a string"); |
| 2375 | p1 += this_len; |
| 2376 | } |
| 2377 | for (i = 0; i < size_byte; i++) |
| 2378 | *p++ = str[i % len]; |
| 2379 | } |
| 2380 | else |
| 2381 | for (index = 0; index < size; index++) |
| 2382 | p[index] = charval; |
| 2383 | } |
| 2384 | else if (BOOL_VECTOR_P (array)) |
| 2385 | { |
| 2386 | register unsigned char *p = XBOOL_VECTOR (array)->data; |
| 2387 | int size_in_chars |
| 2388 | = ((XBOOL_VECTOR (array)->size + BOOL_VECTOR_BITS_PER_CHAR - 1) |
| 2389 | / BOOL_VECTOR_BITS_PER_CHAR); |
| 2390 | |
| 2391 | charval = (! NILP (item) ? -1 : 0); |
| 2392 | for (index = 0; index < size_in_chars - 1; index++) |
| 2393 | p[index] = charval; |
| 2394 | if (index < size_in_chars) |
| 2395 | { |
| 2396 | /* Mask out bits beyond the vector size. */ |
| 2397 | if (XBOOL_VECTOR (array)->size % BOOL_VECTOR_BITS_PER_CHAR) |
| 2398 | charval &= (1 << (XBOOL_VECTOR (array)->size % BOOL_VECTOR_BITS_PER_CHAR)) - 1; |
| 2399 | p[index] = charval; |
| 2400 | } |
| 2401 | } |
| 2402 | else |
| 2403 | { |
| 2404 | array = wrong_type_argument (Qarrayp, array); |
| 2405 | goto retry; |
| 2406 | } |
| 2407 | return array; |
| 2408 | } |
| 2409 | |
| 2410 | DEFUN ("clear-string", Fclear_string, Sclear_string, |
| 2411 | 1, 1, 0, |
| 2412 | doc: /* Clear the contents of STRING. |
| 2413 | This makes STRING unibyte and may change its length. */) |
| 2414 | (string) |
| 2415 | Lisp_Object string; |
| 2416 | { |
| 2417 | int len; |
| 2418 | CHECK_STRING (string); |
| 2419 | len = SBYTES (string); |
| 2420 | bzero (SDATA (string), len); |
| 2421 | STRING_SET_CHARS (string, len); |
| 2422 | STRING_SET_UNIBYTE (string); |
| 2423 | return Qnil; |
| 2424 | } |
| 2425 | \f |
| 2426 | DEFUN ("char-table-subtype", Fchar_table_subtype, Schar_table_subtype, |
| 2427 | 1, 1, 0, |
| 2428 | doc: /* Return the subtype of char-table CHAR-TABLE. The value is a symbol. */) |
| 2429 | (char_table) |
| 2430 | Lisp_Object char_table; |
| 2431 | { |
| 2432 | CHECK_CHAR_TABLE (char_table); |
| 2433 | |
| 2434 | return XCHAR_TABLE (char_table)->purpose; |
| 2435 | } |
| 2436 | |
| 2437 | DEFUN ("char-table-parent", Fchar_table_parent, Schar_table_parent, |
| 2438 | 1, 1, 0, |
| 2439 | doc: /* Return the parent char-table of CHAR-TABLE. |
| 2440 | The value is either nil or another char-table. |
| 2441 | If CHAR-TABLE holds nil for a given character, |
| 2442 | then the actual applicable value is inherited from the parent char-table |
| 2443 | \(or from its parents, if necessary). */) |
| 2444 | (char_table) |
| 2445 | Lisp_Object char_table; |
| 2446 | { |
| 2447 | CHECK_CHAR_TABLE (char_table); |
| 2448 | |
| 2449 | return XCHAR_TABLE (char_table)->parent; |
| 2450 | } |
| 2451 | |
| 2452 | DEFUN ("set-char-table-parent", Fset_char_table_parent, Sset_char_table_parent, |
| 2453 | 2, 2, 0, |
| 2454 | doc: /* Set the parent char-table of CHAR-TABLE to PARENT. |
| 2455 | Return PARENT. PARENT must be either nil or another char-table. */) |
| 2456 | (char_table, parent) |
| 2457 | Lisp_Object char_table, parent; |
| 2458 | { |
| 2459 | Lisp_Object temp; |
| 2460 | |
| 2461 | CHECK_CHAR_TABLE (char_table); |
| 2462 | |
| 2463 | if (!NILP (parent)) |
| 2464 | { |
| 2465 | CHECK_CHAR_TABLE (parent); |
| 2466 | |
| 2467 | for (temp = parent; !NILP (temp); temp = XCHAR_TABLE (temp)->parent) |
| 2468 | if (EQ (temp, char_table)) |
| 2469 | error ("Attempt to make a chartable be its own parent"); |
| 2470 | } |
| 2471 | |
| 2472 | XCHAR_TABLE (char_table)->parent = parent; |
| 2473 | |
| 2474 | return parent; |
| 2475 | } |
| 2476 | |
| 2477 | DEFUN ("char-table-extra-slot", Fchar_table_extra_slot, Schar_table_extra_slot, |
| 2478 | 2, 2, 0, |
| 2479 | doc: /* Return the value of CHAR-TABLE's extra-slot number N. */) |
| 2480 | (char_table, n) |
| 2481 | Lisp_Object char_table, n; |
| 2482 | { |
| 2483 | CHECK_CHAR_TABLE (char_table); |
| 2484 | CHECK_NUMBER (n); |
| 2485 | if (XINT (n) < 0 |
| 2486 | || XINT (n) >= CHAR_TABLE_EXTRA_SLOTS (XCHAR_TABLE (char_table))) |
| 2487 | args_out_of_range (char_table, n); |
| 2488 | |
| 2489 | return XCHAR_TABLE (char_table)->extras[XINT (n)]; |
| 2490 | } |
| 2491 | |
| 2492 | DEFUN ("set-char-table-extra-slot", Fset_char_table_extra_slot, |
| 2493 | Sset_char_table_extra_slot, |
| 2494 | 3, 3, 0, |
| 2495 | doc: /* Set CHAR-TABLE's extra-slot number N to VALUE. */) |
| 2496 | (char_table, n, value) |
| 2497 | Lisp_Object char_table, n, value; |
| 2498 | { |
| 2499 | CHECK_CHAR_TABLE (char_table); |
| 2500 | CHECK_NUMBER (n); |
| 2501 | if (XINT (n) < 0 |
| 2502 | || XINT (n) >= CHAR_TABLE_EXTRA_SLOTS (XCHAR_TABLE (char_table))) |
| 2503 | args_out_of_range (char_table, n); |
| 2504 | |
| 2505 | return XCHAR_TABLE (char_table)->extras[XINT (n)] = value; |
| 2506 | } |
| 2507 | \f |
| 2508 | DEFUN ("char-table-range", Fchar_table_range, Schar_table_range, |
| 2509 | 2, 2, 0, |
| 2510 | doc: /* Return the value in CHAR-TABLE for a range of characters RANGE. |
| 2511 | RANGE should be nil (for the default value) |
| 2512 | a vector which identifies a character set or a row of a character set, |
| 2513 | a character set name, or a character code. */) |
| 2514 | (char_table, range) |
| 2515 | Lisp_Object char_table, range; |
| 2516 | { |
| 2517 | CHECK_CHAR_TABLE (char_table); |
| 2518 | |
| 2519 | if (EQ (range, Qnil)) |
| 2520 | return XCHAR_TABLE (char_table)->defalt; |
| 2521 | else if (INTEGERP (range)) |
| 2522 | return Faref (char_table, range); |
| 2523 | else if (SYMBOLP (range)) |
| 2524 | { |
| 2525 | Lisp_Object charset_info; |
| 2526 | |
| 2527 | charset_info = Fget (range, Qcharset); |
| 2528 | CHECK_VECTOR (charset_info); |
| 2529 | |
| 2530 | return Faref (char_table, |
| 2531 | make_number (XINT (XVECTOR (charset_info)->contents[0]) |
| 2532 | + 128)); |
| 2533 | } |
| 2534 | else if (VECTORP (range)) |
| 2535 | { |
| 2536 | if (XVECTOR (range)->size == 1) |
| 2537 | return Faref (char_table, |
| 2538 | make_number (XINT (XVECTOR (range)->contents[0]) + 128)); |
| 2539 | else |
| 2540 | { |
| 2541 | int size = XVECTOR (range)->size; |
| 2542 | Lisp_Object *val = XVECTOR (range)->contents; |
| 2543 | Lisp_Object ch = Fmake_char_internal (size <= 0 ? Qnil : val[0], |
| 2544 | size <= 1 ? Qnil : val[1], |
| 2545 | size <= 2 ? Qnil : val[2]); |
| 2546 | return Faref (char_table, ch); |
| 2547 | } |
| 2548 | } |
| 2549 | else |
| 2550 | error ("Invalid RANGE argument to `char-table-range'"); |
| 2551 | return Qt; |
| 2552 | } |
| 2553 | |
| 2554 | DEFUN ("set-char-table-range", Fset_char_table_range, Sset_char_table_range, |
| 2555 | 3, 3, 0, |
| 2556 | doc: /* Set the value in CHAR-TABLE for a range of characters RANGE to VALUE. |
| 2557 | RANGE should be t (for all characters), nil (for the default value), |
| 2558 | a character set, a vector which identifies a character set, a row of a |
| 2559 | character set, or a character code. Return VALUE. */) |
| 2560 | (char_table, range, value) |
| 2561 | Lisp_Object char_table, range, value; |
| 2562 | { |
| 2563 | int i; |
| 2564 | |
| 2565 | CHECK_CHAR_TABLE (char_table); |
| 2566 | |
| 2567 | if (EQ (range, Qt)) |
| 2568 | for (i = 0; i < CHAR_TABLE_ORDINARY_SLOTS; i++) |
| 2569 | XCHAR_TABLE (char_table)->contents[i] = value; |
| 2570 | else if (EQ (range, Qnil)) |
| 2571 | XCHAR_TABLE (char_table)->defalt = value; |
| 2572 | else if (SYMBOLP (range)) |
| 2573 | { |
| 2574 | Lisp_Object charset_info; |
| 2575 | int charset_id; |
| 2576 | |
| 2577 | charset_info = Fget (range, Qcharset); |
| 2578 | if (! VECTORP (charset_info) |
| 2579 | || ! NATNUMP (AREF (charset_info, 0)) |
| 2580 | || (charset_id = XINT (AREF (charset_info, 0)), |
| 2581 | ! CHARSET_DEFINED_P (charset_id))) |
| 2582 | error ("Invalid charset: %s", SDATA (SYMBOL_NAME (range))); |
| 2583 | |
| 2584 | if (charset_id == CHARSET_ASCII) |
| 2585 | for (i = 0; i < 128; i++) |
| 2586 | XCHAR_TABLE (char_table)->contents[i] = value; |
| 2587 | else if (charset_id == CHARSET_8_BIT_CONTROL) |
| 2588 | for (i = 128; i < 160; i++) |
| 2589 | XCHAR_TABLE (char_table)->contents[i] = value; |
| 2590 | else if (charset_id == CHARSET_8_BIT_GRAPHIC) |
| 2591 | for (i = 160; i < 256; i++) |
| 2592 | XCHAR_TABLE (char_table)->contents[i] = value; |
| 2593 | else |
| 2594 | XCHAR_TABLE (char_table)->contents[charset_id + 128] = value; |
| 2595 | } |
| 2596 | else if (INTEGERP (range)) |
| 2597 | Faset (char_table, range, value); |
| 2598 | else if (VECTORP (range)) |
| 2599 | { |
| 2600 | if (XVECTOR (range)->size == 1) |
| 2601 | return Faset (char_table, |
| 2602 | make_number (XINT (XVECTOR (range)->contents[0]) + 128), |
| 2603 | value); |
| 2604 | else |
| 2605 | { |
| 2606 | int size = XVECTOR (range)->size; |
| 2607 | Lisp_Object *val = XVECTOR (range)->contents; |
| 2608 | Lisp_Object ch = Fmake_char_internal (size <= 0 ? Qnil : val[0], |
| 2609 | size <= 1 ? Qnil : val[1], |
| 2610 | size <= 2 ? Qnil : val[2]); |
| 2611 | return Faset (char_table, ch, value); |
| 2612 | } |
| 2613 | } |
| 2614 | else |
| 2615 | error ("Invalid RANGE argument to `set-char-table-range'"); |
| 2616 | |
| 2617 | return value; |
| 2618 | } |
| 2619 | |
| 2620 | DEFUN ("set-char-table-default", Fset_char_table_default, |
| 2621 | Sset_char_table_default, 3, 3, 0, |
| 2622 | doc: /* Set the default value in CHAR-TABLE for generic character CH to VALUE. |
| 2623 | The generic character specifies the group of characters. |
| 2624 | See also the documentation of `make-char'. */) |
| 2625 | (char_table, ch, value) |
| 2626 | Lisp_Object char_table, ch, value; |
| 2627 | { |
| 2628 | int c, charset, code1, code2; |
| 2629 | Lisp_Object temp; |
| 2630 | |
| 2631 | CHECK_CHAR_TABLE (char_table); |
| 2632 | CHECK_NUMBER (ch); |
| 2633 | |
| 2634 | c = XINT (ch); |
| 2635 | SPLIT_CHAR (c, charset, code1, code2); |
| 2636 | |
| 2637 | /* Since we may want to set the default value for a character set |
| 2638 | not yet defined, we check only if the character set is in the |
| 2639 | valid range or not, instead of it is already defined or not. */ |
| 2640 | if (! CHARSET_VALID_P (charset)) |
| 2641 | invalid_character (c); |
| 2642 | |
| 2643 | if (charset == CHARSET_ASCII) |
| 2644 | return (XCHAR_TABLE (char_table)->defalt = value); |
| 2645 | |
| 2646 | /* Even if C is not a generic char, we had better behave as if a |
| 2647 | generic char is specified. */ |
| 2648 | if (!CHARSET_DEFINED_P (charset) || CHARSET_DIMENSION (charset) == 1) |
| 2649 | code1 = 0; |
| 2650 | temp = XCHAR_TABLE (char_table)->contents[charset + 128]; |
| 2651 | if (!code1) |
| 2652 | { |
| 2653 | if (SUB_CHAR_TABLE_P (temp)) |
| 2654 | XCHAR_TABLE (temp)->defalt = value; |
| 2655 | else |
| 2656 | XCHAR_TABLE (char_table)->contents[charset + 128] = value; |
| 2657 | return value; |
| 2658 | } |
| 2659 | if (SUB_CHAR_TABLE_P (temp)) |
| 2660 | char_table = temp; |
| 2661 | else |
| 2662 | char_table = (XCHAR_TABLE (char_table)->contents[charset + 128] |
| 2663 | = make_sub_char_table (temp)); |
| 2664 | temp = XCHAR_TABLE (char_table)->contents[code1]; |
| 2665 | if (SUB_CHAR_TABLE_P (temp)) |
| 2666 | XCHAR_TABLE (temp)->defalt = value; |
| 2667 | else |
| 2668 | XCHAR_TABLE (char_table)->contents[code1] = value; |
| 2669 | return value; |
| 2670 | } |
| 2671 | |
| 2672 | /* Look up the element in TABLE at index CH, |
| 2673 | and return it as an integer. |
| 2674 | If the element is nil, return CH itself. |
| 2675 | (Actually we do that for any non-integer.) */ |
| 2676 | |
| 2677 | int |
| 2678 | char_table_translate (table, ch) |
| 2679 | Lisp_Object table; |
| 2680 | int ch; |
| 2681 | { |
| 2682 | Lisp_Object value; |
| 2683 | value = Faref (table, make_number (ch)); |
| 2684 | if (! INTEGERP (value)) |
| 2685 | return ch; |
| 2686 | return XINT (value); |
| 2687 | } |
| 2688 | |
| 2689 | static void |
| 2690 | optimize_sub_char_table (table, chars) |
| 2691 | Lisp_Object *table; |
| 2692 | int chars; |
| 2693 | { |
| 2694 | Lisp_Object elt; |
| 2695 | int from, to; |
| 2696 | |
| 2697 | if (chars == 94) |
| 2698 | from = 33, to = 127; |
| 2699 | else |
| 2700 | from = 32, to = 128; |
| 2701 | |
| 2702 | if (!SUB_CHAR_TABLE_P (*table)) |
| 2703 | return; |
| 2704 | elt = XCHAR_TABLE (*table)->contents[from++]; |
| 2705 | for (; from < to; from++) |
| 2706 | if (NILP (Fequal (elt, XCHAR_TABLE (*table)->contents[from]))) |
| 2707 | return; |
| 2708 | *table = elt; |
| 2709 | } |
| 2710 | |
| 2711 | DEFUN ("optimize-char-table", Foptimize_char_table, Soptimize_char_table, |
| 2712 | 1, 1, 0, doc: /* Optimize char table TABLE. */) |
| 2713 | (table) |
| 2714 | Lisp_Object table; |
| 2715 | { |
| 2716 | Lisp_Object elt; |
| 2717 | int dim; |
| 2718 | int i, j; |
| 2719 | |
| 2720 | CHECK_CHAR_TABLE (table); |
| 2721 | |
| 2722 | for (i = CHAR_TABLE_SINGLE_BYTE_SLOTS; i < CHAR_TABLE_ORDINARY_SLOTS; i++) |
| 2723 | { |
| 2724 | elt = XCHAR_TABLE (table)->contents[i]; |
| 2725 | if (!SUB_CHAR_TABLE_P (elt)) |
| 2726 | continue; |
| 2727 | dim = CHARSET_DIMENSION (i - 128); |
| 2728 | if (dim == 2) |
| 2729 | for (j = 32; j < SUB_CHAR_TABLE_ORDINARY_SLOTS; j++) |
| 2730 | optimize_sub_char_table (XCHAR_TABLE (elt)->contents + j, dim); |
| 2731 | optimize_sub_char_table (XCHAR_TABLE (table)->contents + i, dim); |
| 2732 | } |
| 2733 | return Qnil; |
| 2734 | } |
| 2735 | |
| 2736 | \f |
| 2737 | /* Map C_FUNCTION or FUNCTION over SUBTABLE, calling it for each |
| 2738 | character or group of characters that share a value. |
| 2739 | DEPTH is the current depth in the originally specified |
| 2740 | chartable, and INDICES contains the vector indices |
| 2741 | for the levels our callers have descended. |
| 2742 | |
| 2743 | ARG is passed to C_FUNCTION when that is called. */ |
| 2744 | |
| 2745 | void |
| 2746 | map_char_table (c_function, function, table, subtable, arg, depth, indices) |
| 2747 | void (*c_function) P_ ((Lisp_Object, Lisp_Object, Lisp_Object)); |
| 2748 | Lisp_Object function, table, subtable, arg, *indices; |
| 2749 | int depth; |
| 2750 | { |
| 2751 | int i, to; |
| 2752 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4; |
| 2753 | |
| 2754 | GCPRO4 (arg, table, subtable, function); |
| 2755 | |
| 2756 | if (depth == 0) |
| 2757 | { |
| 2758 | /* At first, handle ASCII and 8-bit European characters. */ |
| 2759 | for (i = 0; i < CHAR_TABLE_SINGLE_BYTE_SLOTS; i++) |
| 2760 | { |
| 2761 | Lisp_Object elt= XCHAR_TABLE (subtable)->contents[i]; |
| 2762 | if (NILP (elt)) |
| 2763 | elt = XCHAR_TABLE (subtable)->defalt; |
| 2764 | if (NILP (elt)) |
| 2765 | elt = Faref (subtable, make_number (i)); |
| 2766 | if (c_function) |
| 2767 | (*c_function) (arg, make_number (i), elt); |
| 2768 | else |
| 2769 | call2 (function, make_number (i), elt); |
| 2770 | } |
| 2771 | #if 0 /* If the char table has entries for higher characters, |
| 2772 | we should report them. */ |
| 2773 | if (NILP (current_buffer->enable_multibyte_characters)) |
| 2774 | { |
| 2775 | UNGCPRO; |
| 2776 | return; |
| 2777 | } |
| 2778 | #endif |
| 2779 | to = CHAR_TABLE_ORDINARY_SLOTS; |
| 2780 | } |
| 2781 | else |
| 2782 | { |
| 2783 | int charset = XFASTINT (indices[0]) - 128; |
| 2784 | |
| 2785 | i = 32; |
| 2786 | to = SUB_CHAR_TABLE_ORDINARY_SLOTS; |
| 2787 | if (CHARSET_CHARS (charset) == 94) |
| 2788 | i++, to--; |
| 2789 | } |
| 2790 | |
| 2791 | for (; i < to; i++) |
| 2792 | { |
| 2793 | Lisp_Object elt; |
| 2794 | int charset; |
| 2795 | |
| 2796 | elt = XCHAR_TABLE (subtable)->contents[i]; |
| 2797 | XSETFASTINT (indices[depth], i); |
| 2798 | charset = XFASTINT (indices[0]) - 128; |
| 2799 | if (depth == 0 |
| 2800 | && (!CHARSET_DEFINED_P (charset) |
| 2801 | || charset == CHARSET_8_BIT_CONTROL |
| 2802 | || charset == CHARSET_8_BIT_GRAPHIC)) |
| 2803 | continue; |
| 2804 | |
| 2805 | if (SUB_CHAR_TABLE_P (elt)) |
| 2806 | { |
| 2807 | if (depth >= 3) |
| 2808 | error ("Too deep char table"); |
| 2809 | map_char_table (c_function, function, table, elt, arg, depth + 1, indices); |
| 2810 | } |
| 2811 | else |
| 2812 | { |
| 2813 | int c1, c2, c; |
| 2814 | |
| 2815 | c1 = depth >= 1 ? XFASTINT (indices[1]) : 0; |
| 2816 | c2 = depth >= 2 ? XFASTINT (indices[2]) : 0; |
| 2817 | c = MAKE_CHAR (charset, c1, c2); |
| 2818 | |
| 2819 | if (NILP (elt)) |
| 2820 | elt = XCHAR_TABLE (subtable)->defalt; |
| 2821 | if (NILP (elt)) |
| 2822 | elt = Faref (table, make_number (c)); |
| 2823 | |
| 2824 | if (c_function) |
| 2825 | (*c_function) (arg, make_number (c), elt); |
| 2826 | else |
| 2827 | call2 (function, make_number (c), elt); |
| 2828 | } |
| 2829 | } |
| 2830 | UNGCPRO; |
| 2831 | } |
| 2832 | |
| 2833 | static void void_call2 P_ ((Lisp_Object a, Lisp_Object b, Lisp_Object c)); |
| 2834 | static void |
| 2835 | void_call2 (a, b, c) |
| 2836 | Lisp_Object a, b, c; |
| 2837 | { |
| 2838 | call2 (a, b, c); |
| 2839 | } |
| 2840 | |
| 2841 | DEFUN ("map-char-table", Fmap_char_table, Smap_char_table, |
| 2842 | 2, 2, 0, |
| 2843 | doc: /* Call FUNCTION for each (normal and generic) characters in CHAR-TABLE. |
| 2844 | FUNCTION is called with two arguments--a key and a value. |
| 2845 | The key is always a possible IDX argument to `aref'. */) |
| 2846 | (function, char_table) |
| 2847 | Lisp_Object function, char_table; |
| 2848 | { |
| 2849 | /* The depth of char table is at most 3. */ |
| 2850 | Lisp_Object indices[3]; |
| 2851 | |
| 2852 | CHECK_CHAR_TABLE (char_table); |
| 2853 | |
| 2854 | /* When Lisp_Object is represented as a union, `call2' cannot directly |
| 2855 | be passed to map_char_table because it returns a Lisp_Object rather |
| 2856 | than returning nothing. |
| 2857 | Casting leads to crashes on some architectures. -stef */ |
| 2858 | map_char_table (void_call2, Qnil, char_table, char_table, function, 0, indices); |
| 2859 | return Qnil; |
| 2860 | } |
| 2861 | |
| 2862 | /* Return a value for character C in char-table TABLE. Store the |
| 2863 | actual index for that value in *IDX. Ignore the default value of |
| 2864 | TABLE. */ |
| 2865 | |
| 2866 | Lisp_Object |
| 2867 | char_table_ref_and_index (table, c, idx) |
| 2868 | Lisp_Object table; |
| 2869 | int c, *idx; |
| 2870 | { |
| 2871 | int charset, c1, c2; |
| 2872 | Lisp_Object elt; |
| 2873 | |
| 2874 | if (SINGLE_BYTE_CHAR_P (c)) |
| 2875 | { |
| 2876 | *idx = c; |
| 2877 | return XCHAR_TABLE (table)->contents[c]; |
| 2878 | } |
| 2879 | SPLIT_CHAR (c, charset, c1, c2); |
| 2880 | elt = XCHAR_TABLE (table)->contents[charset + 128]; |
| 2881 | *idx = MAKE_CHAR (charset, 0, 0); |
| 2882 | if (!SUB_CHAR_TABLE_P (elt)) |
| 2883 | return elt; |
| 2884 | if (c1 < 32 || NILP (XCHAR_TABLE (elt)->contents[c1])) |
| 2885 | return XCHAR_TABLE (elt)->defalt; |
| 2886 | elt = XCHAR_TABLE (elt)->contents[c1]; |
| 2887 | *idx = MAKE_CHAR (charset, c1, 0); |
| 2888 | if (!SUB_CHAR_TABLE_P (elt)) |
| 2889 | return elt; |
| 2890 | if (c2 < 32 || NILP (XCHAR_TABLE (elt)->contents[c2])) |
| 2891 | return XCHAR_TABLE (elt)->defalt; |
| 2892 | *idx = c; |
| 2893 | return XCHAR_TABLE (elt)->contents[c2]; |
| 2894 | } |
| 2895 | |
| 2896 | \f |
| 2897 | /* ARGSUSED */ |
| 2898 | Lisp_Object |
| 2899 | nconc2 (s1, s2) |
| 2900 | Lisp_Object s1, s2; |
| 2901 | { |
| 2902 | #ifdef NO_ARG_ARRAY |
| 2903 | Lisp_Object args[2]; |
| 2904 | args[0] = s1; |
| 2905 | args[1] = s2; |
| 2906 | return Fnconc (2, args); |
| 2907 | #else |
| 2908 | return Fnconc (2, &s1); |
| 2909 | #endif /* NO_ARG_ARRAY */ |
| 2910 | } |
| 2911 | |
| 2912 | DEFUN ("nconc", Fnconc, Snconc, 0, MANY, 0, |
| 2913 | doc: /* Concatenate any number of lists by altering them. |
| 2914 | Only the last argument is not altered, and need not be a list. |
| 2915 | usage: (nconc &rest LISTS) */) |
| 2916 | (nargs, args) |
| 2917 | int nargs; |
| 2918 | Lisp_Object *args; |
| 2919 | { |
| 2920 | register int argnum; |
| 2921 | register Lisp_Object tail, tem, val; |
| 2922 | |
| 2923 | val = tail = Qnil; |
| 2924 | |
| 2925 | for (argnum = 0; argnum < nargs; argnum++) |
| 2926 | { |
| 2927 | tem = args[argnum]; |
| 2928 | if (NILP (tem)) continue; |
| 2929 | |
| 2930 | if (NILP (val)) |
| 2931 | val = tem; |
| 2932 | |
| 2933 | if (argnum + 1 == nargs) break; |
| 2934 | |
| 2935 | if (!CONSP (tem)) |
| 2936 | tem = wrong_type_argument (Qlistp, tem); |
| 2937 | |
| 2938 | while (CONSP (tem)) |
| 2939 | { |
| 2940 | tail = tem; |
| 2941 | tem = XCDR (tail); |
| 2942 | QUIT; |
| 2943 | } |
| 2944 | |
| 2945 | tem = args[argnum + 1]; |
| 2946 | Fsetcdr (tail, tem); |
| 2947 | if (NILP (tem)) |
| 2948 | args[argnum + 1] = tail; |
| 2949 | } |
| 2950 | |
| 2951 | return val; |
| 2952 | } |
| 2953 | \f |
| 2954 | /* This is the guts of all mapping functions. |
| 2955 | Apply FN to each element of SEQ, one by one, |
| 2956 | storing the results into elements of VALS, a C vector of Lisp_Objects. |
| 2957 | LENI is the length of VALS, which should also be the length of SEQ. */ |
| 2958 | |
| 2959 | static void |
| 2960 | mapcar1 (leni, vals, fn, seq) |
| 2961 | int leni; |
| 2962 | Lisp_Object *vals; |
| 2963 | Lisp_Object fn, seq; |
| 2964 | { |
| 2965 | register Lisp_Object tail; |
| 2966 | Lisp_Object dummy; |
| 2967 | register int i; |
| 2968 | struct gcpro gcpro1, gcpro2, gcpro3; |
| 2969 | |
| 2970 | if (vals) |
| 2971 | { |
| 2972 | /* Don't let vals contain any garbage when GC happens. */ |
| 2973 | for (i = 0; i < leni; i++) |
| 2974 | vals[i] = Qnil; |
| 2975 | |
| 2976 | GCPRO3 (dummy, fn, seq); |
| 2977 | gcpro1.var = vals; |
| 2978 | gcpro1.nvars = leni; |
| 2979 | } |
| 2980 | else |
| 2981 | GCPRO2 (fn, seq); |
| 2982 | /* We need not explicitly protect `tail' because it is used only on lists, and |
| 2983 | 1) lists are not relocated and 2) the list is marked via `seq' so will not be freed */ |
| 2984 | |
| 2985 | if (VECTORP (seq)) |
| 2986 | { |
| 2987 | for (i = 0; i < leni; i++) |
| 2988 | { |
| 2989 | dummy = XVECTOR (seq)->contents[i]; |
| 2990 | dummy = call1 (fn, dummy); |
| 2991 | if (vals) |
| 2992 | vals[i] = dummy; |
| 2993 | } |
| 2994 | } |
| 2995 | else if (BOOL_VECTOR_P (seq)) |
| 2996 | { |
| 2997 | for (i = 0; i < leni; i++) |
| 2998 | { |
| 2999 | int byte; |
| 3000 | byte = XBOOL_VECTOR (seq)->data[i / BOOL_VECTOR_BITS_PER_CHAR]; |
| 3001 | if (byte & (1 << (i % BOOL_VECTOR_BITS_PER_CHAR))) |
| 3002 | dummy = Qt; |
| 3003 | else |
| 3004 | dummy = Qnil; |
| 3005 | |
| 3006 | dummy = call1 (fn, dummy); |
| 3007 | if (vals) |
| 3008 | vals[i] = dummy; |
| 3009 | } |
| 3010 | } |
| 3011 | else if (STRINGP (seq)) |
| 3012 | { |
| 3013 | int i_byte; |
| 3014 | |
| 3015 | for (i = 0, i_byte = 0; i < leni;) |
| 3016 | { |
| 3017 | int c; |
| 3018 | int i_before = i; |
| 3019 | |
| 3020 | FETCH_STRING_CHAR_ADVANCE (c, seq, i, i_byte); |
| 3021 | XSETFASTINT (dummy, c); |
| 3022 | dummy = call1 (fn, dummy); |
| 3023 | if (vals) |
| 3024 | vals[i_before] = dummy; |
| 3025 | } |
| 3026 | } |
| 3027 | else /* Must be a list, since Flength did not get an error */ |
| 3028 | { |
| 3029 | tail = seq; |
| 3030 | for (i = 0; i < leni; i++) |
| 3031 | { |
| 3032 | dummy = call1 (fn, Fcar (tail)); |
| 3033 | if (vals) |
| 3034 | vals[i] = dummy; |
| 3035 | tail = XCDR (tail); |
| 3036 | } |
| 3037 | } |
| 3038 | |
| 3039 | UNGCPRO; |
| 3040 | } |
| 3041 | |
| 3042 | DEFUN ("mapconcat", Fmapconcat, Smapconcat, 3, 3, 0, |
| 3043 | doc: /* Apply FUNCTION to each element of SEQUENCE, and concat the results as strings. |
| 3044 | In between each pair of results, stick in SEPARATOR. Thus, " " as |
| 3045 | SEPARATOR results in spaces between the values returned by FUNCTION. |
| 3046 | SEQUENCE may be a list, a vector, a bool-vector, or a string. */) |
| 3047 | (function, sequence, separator) |
| 3048 | Lisp_Object function, sequence, separator; |
| 3049 | { |
| 3050 | Lisp_Object len; |
| 3051 | register int leni; |
| 3052 | int nargs; |
| 3053 | register Lisp_Object *args; |
| 3054 | register int i; |
| 3055 | struct gcpro gcpro1; |
| 3056 | Lisp_Object ret; |
| 3057 | USE_SAFE_ALLOCA; |
| 3058 | |
| 3059 | len = Flength (sequence); |
| 3060 | leni = XINT (len); |
| 3061 | nargs = leni + leni - 1; |
| 3062 | if (nargs < 0) return build_string (""); |
| 3063 | |
| 3064 | SAFE_ALLOCA_LISP (args, nargs); |
| 3065 | |
| 3066 | GCPRO1 (separator); |
| 3067 | mapcar1 (leni, args, function, sequence); |
| 3068 | UNGCPRO; |
| 3069 | |
| 3070 | for (i = leni - 1; i >= 0; i--) |
| 3071 | args[i + i] = args[i]; |
| 3072 | |
| 3073 | for (i = 1; i < nargs; i += 2) |
| 3074 | args[i] = separator; |
| 3075 | |
| 3076 | ret = Fconcat (nargs, args); |
| 3077 | SAFE_FREE (); |
| 3078 | |
| 3079 | return ret; |
| 3080 | } |
| 3081 | |
| 3082 | DEFUN ("mapcar", Fmapcar, Smapcar, 2, 2, 0, |
| 3083 | doc: /* Apply FUNCTION to each element of SEQUENCE, and make a list of the results. |
| 3084 | The result is a list just as long as SEQUENCE. |
| 3085 | SEQUENCE may be a list, a vector, a bool-vector, or a string. */) |
| 3086 | (function, sequence) |
| 3087 | Lisp_Object function, sequence; |
| 3088 | { |
| 3089 | register Lisp_Object len; |
| 3090 | register int leni; |
| 3091 | register Lisp_Object *args; |
| 3092 | Lisp_Object ret; |
| 3093 | USE_SAFE_ALLOCA; |
| 3094 | |
| 3095 | len = Flength (sequence); |
| 3096 | leni = XFASTINT (len); |
| 3097 | |
| 3098 | SAFE_ALLOCA_LISP (args, leni); |
| 3099 | |
| 3100 | mapcar1 (leni, args, function, sequence); |
| 3101 | |
| 3102 | ret = Flist (leni, args); |
| 3103 | SAFE_FREE (); |
| 3104 | |
| 3105 | return ret; |
| 3106 | } |
| 3107 | |
| 3108 | DEFUN ("mapc", Fmapc, Smapc, 2, 2, 0, |
| 3109 | doc: /* Apply FUNCTION to each element of SEQUENCE for side effects only. |
| 3110 | Unlike `mapcar', don't accumulate the results. Return SEQUENCE. |
| 3111 | SEQUENCE may be a list, a vector, a bool-vector, or a string. */) |
| 3112 | (function, sequence) |
| 3113 | Lisp_Object function, sequence; |
| 3114 | { |
| 3115 | register int leni; |
| 3116 | |
| 3117 | leni = XFASTINT (Flength (sequence)); |
| 3118 | mapcar1 (leni, 0, function, sequence); |
| 3119 | |
| 3120 | return sequence; |
| 3121 | } |
| 3122 | \f |
| 3123 | /* Anything that calls this function must protect from GC! */ |
| 3124 | |
| 3125 | DEFUN ("y-or-n-p", Fy_or_n_p, Sy_or_n_p, 1, 1, 0, |
| 3126 | doc: /* Ask user a "y or n" question. Return t if answer is "y". |
| 3127 | Takes one argument, which is the string to display to ask the question. |
| 3128 | It should end in a space; `y-or-n-p' adds `(y or n) ' to it. |
| 3129 | No confirmation of the answer is requested; a single character is enough. |
| 3130 | Also accepts Space to mean yes, or Delete to mean no. \(Actually, it uses |
| 3131 | the bindings in `query-replace-map'; see the documentation of that variable |
| 3132 | for more information. In this case, the useful bindings are `act', `skip', |
| 3133 | `recenter', and `quit'.\) |
| 3134 | |
| 3135 | Under a windowing system a dialog box will be used if `last-nonmenu-event' |
| 3136 | is nil and `use-dialog-box' is non-nil. */) |
| 3137 | (prompt) |
| 3138 | Lisp_Object prompt; |
| 3139 | { |
| 3140 | register Lisp_Object obj, key, def, map; |
| 3141 | register int answer; |
| 3142 | Lisp_Object xprompt; |
| 3143 | Lisp_Object args[2]; |
| 3144 | struct gcpro gcpro1, gcpro2; |
| 3145 | int count = SPECPDL_INDEX (); |
| 3146 | |
| 3147 | specbind (Qcursor_in_echo_area, Qt); |
| 3148 | |
| 3149 | map = Fsymbol_value (intern ("query-replace-map")); |
| 3150 | |
| 3151 | CHECK_STRING (prompt); |
| 3152 | xprompt = prompt; |
| 3153 | GCPRO2 (prompt, xprompt); |
| 3154 | |
| 3155 | #ifdef HAVE_X_WINDOWS |
| 3156 | if (display_hourglass_p) |
| 3157 | cancel_hourglass (); |
| 3158 | #endif |
| 3159 | |
| 3160 | while (1) |
| 3161 | { |
| 3162 | |
| 3163 | #ifdef HAVE_MENUS |
| 3164 | if ((NILP (last_nonmenu_event) || CONSP (last_nonmenu_event)) |
| 3165 | && use_dialog_box |
| 3166 | && have_menus_p ()) |
| 3167 | { |
| 3168 | Lisp_Object pane, menu; |
| 3169 | redisplay_preserve_echo_area (3); |
| 3170 | pane = Fcons (Fcons (build_string ("Yes"), Qt), |
| 3171 | Fcons (Fcons (build_string ("No"), Qnil), |
| 3172 | Qnil)); |
| 3173 | menu = Fcons (prompt, pane); |
| 3174 | obj = Fx_popup_dialog (Qt, menu); |
| 3175 | answer = !NILP (obj); |
| 3176 | break; |
| 3177 | } |
| 3178 | #endif /* HAVE_MENUS */ |
| 3179 | cursor_in_echo_area = 1; |
| 3180 | choose_minibuf_frame (); |
| 3181 | |
| 3182 | { |
| 3183 | Lisp_Object pargs[3]; |
| 3184 | |
| 3185 | /* Colorize prompt according to `minibuffer-prompt' face. */ |
| 3186 | pargs[0] = build_string ("%s(y or n) "); |
| 3187 | pargs[1] = intern ("face"); |
| 3188 | pargs[2] = intern ("minibuffer-prompt"); |
| 3189 | args[0] = Fpropertize (3, pargs); |
| 3190 | args[1] = xprompt; |
| 3191 | Fmessage (2, args); |
| 3192 | } |
| 3193 | |
| 3194 | if (minibuffer_auto_raise) |
| 3195 | { |
| 3196 | Lisp_Object mini_frame; |
| 3197 | |
| 3198 | mini_frame = WINDOW_FRAME (XWINDOW (minibuf_window)); |
| 3199 | |
| 3200 | Fraise_frame (mini_frame); |
| 3201 | } |
| 3202 | |
| 3203 | obj = read_filtered_event (1, 0, 0, 0); |
| 3204 | cursor_in_echo_area = 0; |
| 3205 | /* If we need to quit, quit with cursor_in_echo_area = 0. */ |
| 3206 | QUIT; |
| 3207 | |
| 3208 | key = Fmake_vector (make_number (1), obj); |
| 3209 | def = Flookup_key (map, key, Qt); |
| 3210 | |
| 3211 | if (EQ (def, intern ("skip"))) |
| 3212 | { |
| 3213 | answer = 0; |
| 3214 | break; |
| 3215 | } |
| 3216 | else if (EQ (def, intern ("act"))) |
| 3217 | { |
| 3218 | answer = 1; |
| 3219 | break; |
| 3220 | } |
| 3221 | else if (EQ (def, intern ("recenter"))) |
| 3222 | { |
| 3223 | Frecenter (Qnil); |
| 3224 | xprompt = prompt; |
| 3225 | continue; |
| 3226 | } |
| 3227 | else if (EQ (def, intern ("quit"))) |
| 3228 | Vquit_flag = Qt; |
| 3229 | /* We want to exit this command for exit-prefix, |
| 3230 | and this is the only way to do it. */ |
| 3231 | else if (EQ (def, intern ("exit-prefix"))) |
| 3232 | Vquit_flag = Qt; |
| 3233 | |
| 3234 | QUIT; |
| 3235 | |
| 3236 | /* If we don't clear this, then the next call to read_char will |
| 3237 | return quit_char again, and we'll enter an infinite loop. */ |
| 3238 | Vquit_flag = Qnil; |
| 3239 | |
| 3240 | Fding (Qnil); |
| 3241 | Fdiscard_input (); |
| 3242 | if (EQ (xprompt, prompt)) |
| 3243 | { |
| 3244 | args[0] = build_string ("Please answer y or n. "); |
| 3245 | args[1] = prompt; |
| 3246 | xprompt = Fconcat (2, args); |
| 3247 | } |
| 3248 | } |
| 3249 | UNGCPRO; |
| 3250 | |
| 3251 | if (! noninteractive) |
| 3252 | { |
| 3253 | cursor_in_echo_area = -1; |
| 3254 | message_with_string (answer ? "%s(y or n) y" : "%s(y or n) n", |
| 3255 | xprompt, 0); |
| 3256 | } |
| 3257 | |
| 3258 | unbind_to (count, Qnil); |
| 3259 | return answer ? Qt : Qnil; |
| 3260 | } |
| 3261 | \f |
| 3262 | /* This is how C code calls `yes-or-no-p' and allows the user |
| 3263 | to redefined it. |
| 3264 | |
| 3265 | Anything that calls this function must protect from GC! */ |
| 3266 | |
| 3267 | Lisp_Object |
| 3268 | do_yes_or_no_p (prompt) |
| 3269 | Lisp_Object prompt; |
| 3270 | { |
| 3271 | return call1 (intern ("yes-or-no-p"), prompt); |
| 3272 | } |
| 3273 | |
| 3274 | /* Anything that calls this function must protect from GC! */ |
| 3275 | |
| 3276 | DEFUN ("yes-or-no-p", Fyes_or_no_p, Syes_or_no_p, 1, 1, 0, |
| 3277 | doc: /* Ask user a yes-or-no question. Return t if answer is yes. |
| 3278 | Takes one argument, which is the string to display to ask the question. |
| 3279 | It should end in a space; `yes-or-no-p' adds `(yes or no) ' to it. |
| 3280 | The user must confirm the answer with RET, |
| 3281 | and can edit it until it has been confirmed. |
| 3282 | |
| 3283 | Under a windowing system a dialog box will be used if `last-nonmenu-event' |
| 3284 | is nil, and `use-dialog-box' is non-nil. */) |
| 3285 | (prompt) |
| 3286 | Lisp_Object prompt; |
| 3287 | { |
| 3288 | register Lisp_Object ans; |
| 3289 | Lisp_Object args[2]; |
| 3290 | struct gcpro gcpro1; |
| 3291 | |
| 3292 | CHECK_STRING (prompt); |
| 3293 | |
| 3294 | #ifdef HAVE_MENUS |
| 3295 | if ((NILP (last_nonmenu_event) || CONSP (last_nonmenu_event)) |
| 3296 | && use_dialog_box |
| 3297 | && have_menus_p ()) |
| 3298 | { |
| 3299 | Lisp_Object pane, menu, obj; |
| 3300 | redisplay_preserve_echo_area (4); |
| 3301 | pane = Fcons (Fcons (build_string ("Yes"), Qt), |
| 3302 | Fcons (Fcons (build_string ("No"), Qnil), |
| 3303 | Qnil)); |
| 3304 | GCPRO1 (pane); |
| 3305 | menu = Fcons (prompt, pane); |
| 3306 | obj = Fx_popup_dialog (Qt, menu); |
| 3307 | UNGCPRO; |
| 3308 | return obj; |
| 3309 | } |
| 3310 | #endif /* HAVE_MENUS */ |
| 3311 | |
| 3312 | args[0] = prompt; |
| 3313 | args[1] = build_string ("(yes or no) "); |
| 3314 | prompt = Fconcat (2, args); |
| 3315 | |
| 3316 | GCPRO1 (prompt); |
| 3317 | |
| 3318 | while (1) |
| 3319 | { |
| 3320 | ans = Fdowncase (Fread_from_minibuffer (prompt, Qnil, Qnil, Qnil, |
| 3321 | Qyes_or_no_p_history, Qnil, |
| 3322 | Qnil, Qnil)); |
| 3323 | if (SCHARS (ans) == 3 && !strcmp (SDATA (ans), "yes")) |
| 3324 | { |
| 3325 | UNGCPRO; |
| 3326 | return Qt; |
| 3327 | } |
| 3328 | if (SCHARS (ans) == 2 && !strcmp (SDATA (ans), "no")) |
| 3329 | { |
| 3330 | UNGCPRO; |
| 3331 | return Qnil; |
| 3332 | } |
| 3333 | |
| 3334 | Fding (Qnil); |
| 3335 | Fdiscard_input (); |
| 3336 | message ("Please answer yes or no."); |
| 3337 | Fsleep_for (make_number (2), Qnil); |
| 3338 | } |
| 3339 | } |
| 3340 | \f |
| 3341 | DEFUN ("load-average", Fload_average, Sload_average, 0, 1, 0, |
| 3342 | doc: /* Return list of 1 minute, 5 minute and 15 minute load averages. |
| 3343 | |
| 3344 | Each of the three load averages is multiplied by 100, then converted |
| 3345 | to integer. |
| 3346 | |
| 3347 | When USE-FLOATS is non-nil, floats will be used instead of integers. |
| 3348 | These floats are not multiplied by 100. |
| 3349 | |
| 3350 | If the 5-minute or 15-minute load averages are not available, return a |
| 3351 | shortened list, containing only those averages which are available. |
| 3352 | |
| 3353 | An error is thrown if the load average can't be obtained. In some |
| 3354 | cases making it work would require Emacs being installed setuid or |
| 3355 | setgid so that it can read kernel information, and that usually isn't |
| 3356 | advisable. */) |
| 3357 | (use_floats) |
| 3358 | Lisp_Object use_floats; |
| 3359 | { |
| 3360 | double load_ave[3]; |
| 3361 | int loads = getloadavg (load_ave, 3); |
| 3362 | Lisp_Object ret = Qnil; |
| 3363 | |
| 3364 | if (loads < 0) |
| 3365 | error ("load-average not implemented for this operating system"); |
| 3366 | |
| 3367 | while (loads-- > 0) |
| 3368 | { |
| 3369 | Lisp_Object load = (NILP (use_floats) ? |
| 3370 | make_number ((int) (100.0 * load_ave[loads])) |
| 3371 | : make_float (load_ave[loads])); |
| 3372 | ret = Fcons (load, ret); |
| 3373 | } |
| 3374 | |
| 3375 | return ret; |
| 3376 | } |
| 3377 | \f |
| 3378 | Lisp_Object Vfeatures, Qsubfeatures; |
| 3379 | extern Lisp_Object Vafter_load_alist; |
| 3380 | |
| 3381 | DEFUN ("featurep", Ffeaturep, Sfeaturep, 1, 2, 0, |
| 3382 | doc: /* Returns t if FEATURE is present in this Emacs. |
| 3383 | |
| 3384 | Use this to conditionalize execution of lisp code based on the |
| 3385 | presence or absence of emacs or environment extensions. |
| 3386 | Use `provide' to declare that a feature is available. This function |
| 3387 | looks at the value of the variable `features'. The optional argument |
| 3388 | SUBFEATURE can be used to check a specific subfeature of FEATURE. */) |
| 3389 | (feature, subfeature) |
| 3390 | Lisp_Object feature, subfeature; |
| 3391 | { |
| 3392 | register Lisp_Object tem; |
| 3393 | CHECK_SYMBOL (feature); |
| 3394 | tem = Fmemq (feature, Vfeatures); |
| 3395 | if (!NILP (tem) && !NILP (subfeature)) |
| 3396 | tem = Fmember (subfeature, Fget (feature, Qsubfeatures)); |
| 3397 | return (NILP (tem)) ? Qnil : Qt; |
| 3398 | } |
| 3399 | |
| 3400 | DEFUN ("provide", Fprovide, Sprovide, 1, 2, 0, |
| 3401 | doc: /* Announce that FEATURE is a feature of the current Emacs. |
| 3402 | The optional argument SUBFEATURES should be a list of symbols listing |
| 3403 | particular subfeatures supported in this version of FEATURE. */) |
| 3404 | (feature, subfeatures) |
| 3405 | Lisp_Object feature, subfeatures; |
| 3406 | { |
| 3407 | register Lisp_Object tem; |
| 3408 | CHECK_SYMBOL (feature); |
| 3409 | CHECK_LIST (subfeatures); |
| 3410 | if (!NILP (Vautoload_queue)) |
| 3411 | Vautoload_queue = Fcons (Fcons (Vfeatures, Qnil), Vautoload_queue); |
| 3412 | tem = Fmemq (feature, Vfeatures); |
| 3413 | if (NILP (tem)) |
| 3414 | Vfeatures = Fcons (feature, Vfeatures); |
| 3415 | if (!NILP (subfeatures)) |
| 3416 | Fput (feature, Qsubfeatures, subfeatures); |
| 3417 | LOADHIST_ATTACH (Fcons (Qprovide, feature)); |
| 3418 | |
| 3419 | /* Run any load-hooks for this file. */ |
| 3420 | tem = Fassq (feature, Vafter_load_alist); |
| 3421 | if (CONSP (tem)) |
| 3422 | Fprogn (XCDR (tem)); |
| 3423 | |
| 3424 | return feature; |
| 3425 | } |
| 3426 | \f |
| 3427 | /* `require' and its subroutines. */ |
| 3428 | |
| 3429 | /* List of features currently being require'd, innermost first. */ |
| 3430 | |
| 3431 | Lisp_Object require_nesting_list; |
| 3432 | |
| 3433 | Lisp_Object |
| 3434 | require_unwind (old_value) |
| 3435 | Lisp_Object old_value; |
| 3436 | { |
| 3437 | return require_nesting_list = old_value; |
| 3438 | } |
| 3439 | |
| 3440 | DEFUN ("require", Frequire, Srequire, 1, 3, 0, |
| 3441 | doc: /* If feature FEATURE is not loaded, load it from FILENAME. |
| 3442 | If FEATURE is not a member of the list `features', then the feature |
| 3443 | is not loaded; so load the file FILENAME. |
| 3444 | If FILENAME is omitted, the printname of FEATURE is used as the file name, |
| 3445 | and `load' will try to load this name appended with the suffix `.elc' or |
| 3446 | `.el', in that order. The name without appended suffix will not be used. |
| 3447 | If the optional third argument NOERROR is non-nil, |
| 3448 | then return nil if the file is not found instead of signaling an error. |
| 3449 | Normally the return value is FEATURE. |
| 3450 | The normal messages at start and end of loading FILENAME are suppressed. */) |
| 3451 | (feature, filename, noerror) |
| 3452 | Lisp_Object feature, filename, noerror; |
| 3453 | { |
| 3454 | register Lisp_Object tem; |
| 3455 | struct gcpro gcpro1, gcpro2; |
| 3456 | |
| 3457 | CHECK_SYMBOL (feature); |
| 3458 | |
| 3459 | /* Record the presence of `require' in this file |
| 3460 | even if the feature specified is already loaded. |
| 3461 | But not more than once in any file, |
| 3462 | and not when we aren't loading a file. */ |
| 3463 | if (! NILP (Vloads_in_progress)) |
| 3464 | { |
| 3465 | tem = Fcons (Qrequire, feature); |
| 3466 | if (NILP (Fmember (tem, Vcurrent_load_list))) |
| 3467 | LOADHIST_ATTACH (tem); |
| 3468 | } |
| 3469 | tem = Fmemq (feature, Vfeatures); |
| 3470 | |
| 3471 | if (NILP (tem)) |
| 3472 | { |
| 3473 | int count = SPECPDL_INDEX (); |
| 3474 | int nesting = 0; |
| 3475 | |
| 3476 | /* This is to make sure that loadup.el gives a clear picture |
| 3477 | of what files are preloaded and when. */ |
| 3478 | if (! NILP (Vpurify_flag)) |
| 3479 | error ("(require %s) while preparing to dump", |
| 3480 | SDATA (SYMBOL_NAME (feature))); |
| 3481 | |
| 3482 | /* A certain amount of recursive `require' is legitimate, |
| 3483 | but if we require the same feature recursively 3 times, |
| 3484 | signal an error. */ |
| 3485 | tem = require_nesting_list; |
| 3486 | while (! NILP (tem)) |
| 3487 | { |
| 3488 | if (! NILP (Fequal (feature, XCAR (tem)))) |
| 3489 | nesting++; |
| 3490 | tem = XCDR (tem); |
| 3491 | } |
| 3492 | if (nesting > 3) |
| 3493 | error ("Recursive `require' for feature `%s'", |
| 3494 | SDATA (SYMBOL_NAME (feature))); |
| 3495 | |
| 3496 | /* Update the list for any nested `require's that occur. */ |
| 3497 | record_unwind_protect (require_unwind, require_nesting_list); |
| 3498 | require_nesting_list = Fcons (feature, require_nesting_list); |
| 3499 | |
| 3500 | /* Value saved here is to be restored into Vautoload_queue */ |
| 3501 | record_unwind_protect (un_autoload, Vautoload_queue); |
| 3502 | Vautoload_queue = Qt; |
| 3503 | |
| 3504 | /* Load the file. */ |
| 3505 | GCPRO2 (feature, filename); |
| 3506 | tem = Fload (NILP (filename) ? Fsymbol_name (feature) : filename, |
| 3507 | noerror, Qt, Qnil, (NILP (filename) ? Qt : Qnil)); |
| 3508 | UNGCPRO; |
| 3509 | |
| 3510 | /* If load failed entirely, return nil. */ |
| 3511 | if (NILP (tem)) |
| 3512 | return unbind_to (count, Qnil); |
| 3513 | |
| 3514 | tem = Fmemq (feature, Vfeatures); |
| 3515 | if (NILP (tem)) |
| 3516 | error ("Required feature `%s' was not provided", |
| 3517 | SDATA (SYMBOL_NAME (feature))); |
| 3518 | |
| 3519 | /* Once loading finishes, don't undo it. */ |
| 3520 | Vautoload_queue = Qt; |
| 3521 | feature = unbind_to (count, feature); |
| 3522 | } |
| 3523 | |
| 3524 | return feature; |
| 3525 | } |
| 3526 | \f |
| 3527 | /* Primitives for work of the "widget" library. |
| 3528 | In an ideal world, this section would not have been necessary. |
| 3529 | However, lisp function calls being as slow as they are, it turns |
| 3530 | out that some functions in the widget library (wid-edit.el) are the |
| 3531 | bottleneck of Widget operation. Here is their translation to C, |
| 3532 | for the sole reason of efficiency. */ |
| 3533 | |
| 3534 | DEFUN ("plist-member", Fplist_member, Splist_member, 2, 2, 0, |
| 3535 | doc: /* Return non-nil if PLIST has the property PROP. |
| 3536 | PLIST is a property list, which is a list of the form |
| 3537 | \(PROP1 VALUE1 PROP2 VALUE2 ...\). PROP is a symbol. |
| 3538 | Unlike `plist-get', this allows you to distinguish between a missing |
| 3539 | property and a property with the value nil. |
| 3540 | The value is actually the tail of PLIST whose car is PROP. */) |
| 3541 | (plist, prop) |
| 3542 | Lisp_Object plist, prop; |
| 3543 | { |
| 3544 | while (CONSP (plist) && !EQ (XCAR (plist), prop)) |
| 3545 | { |
| 3546 | QUIT; |
| 3547 | plist = XCDR (plist); |
| 3548 | plist = CDR (plist); |
| 3549 | } |
| 3550 | return plist; |
| 3551 | } |
| 3552 | |
| 3553 | DEFUN ("widget-put", Fwidget_put, Swidget_put, 3, 3, 0, |
| 3554 | doc: /* In WIDGET, set PROPERTY to VALUE. |
| 3555 | The value can later be retrieved with `widget-get'. */) |
| 3556 | (widget, property, value) |
| 3557 | Lisp_Object widget, property, value; |
| 3558 | { |
| 3559 | CHECK_CONS (widget); |
| 3560 | XSETCDR (widget, Fplist_put (XCDR (widget), property, value)); |
| 3561 | return value; |
| 3562 | } |
| 3563 | |
| 3564 | DEFUN ("widget-get", Fwidget_get, Swidget_get, 2, 2, 0, |
| 3565 | doc: /* In WIDGET, get the value of PROPERTY. |
| 3566 | The value could either be specified when the widget was created, or |
| 3567 | later with `widget-put'. */) |
| 3568 | (widget, property) |
| 3569 | Lisp_Object widget, property; |
| 3570 | { |
| 3571 | Lisp_Object tmp; |
| 3572 | |
| 3573 | while (1) |
| 3574 | { |
| 3575 | if (NILP (widget)) |
| 3576 | return Qnil; |
| 3577 | CHECK_CONS (widget); |
| 3578 | tmp = Fplist_member (XCDR (widget), property); |
| 3579 | if (CONSP (tmp)) |
| 3580 | { |
| 3581 | tmp = XCDR (tmp); |
| 3582 | return CAR (tmp); |
| 3583 | } |
| 3584 | tmp = XCAR (widget); |
| 3585 | if (NILP (tmp)) |
| 3586 | return Qnil; |
| 3587 | widget = Fget (tmp, Qwidget_type); |
| 3588 | } |
| 3589 | } |
| 3590 | |
| 3591 | DEFUN ("widget-apply", Fwidget_apply, Swidget_apply, 2, MANY, 0, |
| 3592 | doc: /* Apply the value of WIDGET's PROPERTY to the widget itself. |
| 3593 | ARGS are passed as extra arguments to the function. |
| 3594 | usage: (widget-apply WIDGET PROPERTY &rest ARGS) */) |
| 3595 | (nargs, args) |
| 3596 | int nargs; |
| 3597 | Lisp_Object *args; |
| 3598 | { |
| 3599 | /* This function can GC. */ |
| 3600 | Lisp_Object newargs[3]; |
| 3601 | struct gcpro gcpro1, gcpro2; |
| 3602 | Lisp_Object result; |
| 3603 | |
| 3604 | newargs[0] = Fwidget_get (args[0], args[1]); |
| 3605 | newargs[1] = args[0]; |
| 3606 | newargs[2] = Flist (nargs - 2, args + 2); |
| 3607 | GCPRO2 (newargs[0], newargs[2]); |
| 3608 | result = Fapply (3, newargs); |
| 3609 | UNGCPRO; |
| 3610 | return result; |
| 3611 | } |
| 3612 | |
| 3613 | #ifdef HAVE_LANGINFO_CODESET |
| 3614 | #include <langinfo.h> |
| 3615 | #endif |
| 3616 | |
| 3617 | DEFUN ("locale-info", Flocale_info, Slocale_info, 1, 1, 0, |
| 3618 | doc: /* Access locale data ITEM for the current C locale, if available. |
| 3619 | ITEM should be one of the following: |
| 3620 | |
| 3621 | `codeset', returning the character set as a string (locale item CODESET); |
| 3622 | |
| 3623 | `days', returning a 7-element vector of day names (locale items DAY_n); |
| 3624 | |
| 3625 | `months', returning a 12-element vector of month names (locale items MON_n); |
| 3626 | |
| 3627 | `paper', returning a list (WIDTH HEIGHT) for the default paper size, |
| 3628 | both measured in milimeters (locale items PAPER_WIDTH, PAPER_HEIGHT). |
| 3629 | |
| 3630 | If the system can't provide such information through a call to |
| 3631 | `nl_langinfo', or if ITEM isn't from the list above, return nil. |
| 3632 | |
| 3633 | See also Info node `(libc)Locales'. |
| 3634 | |
| 3635 | The data read from the system are decoded using `locale-coding-system'. */) |
| 3636 | (item) |
| 3637 | Lisp_Object item; |
| 3638 | { |
| 3639 | char *str = NULL; |
| 3640 | #ifdef HAVE_LANGINFO_CODESET |
| 3641 | Lisp_Object val; |
| 3642 | if (EQ (item, Qcodeset)) |
| 3643 | { |
| 3644 | str = nl_langinfo (CODESET); |
| 3645 | return build_string (str); |
| 3646 | } |
| 3647 | #ifdef DAY_1 |
| 3648 | else if (EQ (item, Qdays)) /* e.g. for calendar-day-name-array */ |
| 3649 | { |
| 3650 | Lisp_Object v = Fmake_vector (make_number (7), Qnil); |
| 3651 | int days[7] = {DAY_1, DAY_2, DAY_3, DAY_4, DAY_5, DAY_6, DAY_7}; |
| 3652 | int i; |
| 3653 | synchronize_system_time_locale (); |
| 3654 | for (i = 0; i < 7; i++) |
| 3655 | { |
| 3656 | str = nl_langinfo (days[i]); |
| 3657 | val = make_unibyte_string (str, strlen (str)); |
| 3658 | /* Fixme: Is this coding system necessarily right, even if |
| 3659 | it is consistent with CODESET? If not, what to do? */ |
| 3660 | Faset (v, make_number (i), |
| 3661 | code_convert_string_norecord (val, Vlocale_coding_system, |
| 3662 | 0)); |
| 3663 | } |
| 3664 | return v; |
| 3665 | } |
| 3666 | #endif /* DAY_1 */ |
| 3667 | #ifdef MON_1 |
| 3668 | else if (EQ (item, Qmonths)) /* e.g. for calendar-month-name-array */ |
| 3669 | { |
| 3670 | struct Lisp_Vector *p = allocate_vector (12); |
| 3671 | int months[12] = {MON_1, MON_2, MON_3, MON_4, MON_5, MON_6, MON_7, |
| 3672 | MON_8, MON_9, MON_10, MON_11, MON_12}; |
| 3673 | int i; |
| 3674 | synchronize_system_time_locale (); |
| 3675 | for (i = 0; i < 12; i++) |
| 3676 | { |
| 3677 | str = nl_langinfo (months[i]); |
| 3678 | val = make_unibyte_string (str, strlen (str)); |
| 3679 | p->contents[i] = |
| 3680 | code_convert_string_norecord (val, Vlocale_coding_system, 0); |
| 3681 | } |
| 3682 | XSETVECTOR (val, p); |
| 3683 | return val; |
| 3684 | } |
| 3685 | #endif /* MON_1 */ |
| 3686 | /* LC_PAPER stuff isn't defined as accessible in glibc as of 2.3.1, |
| 3687 | but is in the locale files. This could be used by ps-print. */ |
| 3688 | #ifdef PAPER_WIDTH |
| 3689 | else if (EQ (item, Qpaper)) |
| 3690 | { |
| 3691 | return list2 (make_number (nl_langinfo (PAPER_WIDTH)), |
| 3692 | make_number (nl_langinfo (PAPER_HEIGHT))); |
| 3693 | } |
| 3694 | #endif /* PAPER_WIDTH */ |
| 3695 | #endif /* HAVE_LANGINFO_CODESET*/ |
| 3696 | return Qnil; |
| 3697 | } |
| 3698 | \f |
| 3699 | /* base64 encode/decode functions (RFC 2045). |
| 3700 | Based on code from GNU recode. */ |
| 3701 | |
| 3702 | #define MIME_LINE_LENGTH 76 |
| 3703 | |
| 3704 | #define IS_ASCII(Character) \ |
| 3705 | ((Character) < 128) |
| 3706 | #define IS_BASE64(Character) \ |
| 3707 | (IS_ASCII (Character) && base64_char_to_value[Character] >= 0) |
| 3708 | #define IS_BASE64_IGNORABLE(Character) \ |
| 3709 | ((Character) == ' ' || (Character) == '\t' || (Character) == '\n' \ |
| 3710 | || (Character) == '\f' || (Character) == '\r') |
| 3711 | |
| 3712 | /* Used by base64_decode_1 to retrieve a non-base64-ignorable |
| 3713 | character or return retval if there are no characters left to |
| 3714 | process. */ |
| 3715 | #define READ_QUADRUPLET_BYTE(retval) \ |
| 3716 | do \ |
| 3717 | { \ |
| 3718 | if (i == length) \ |
| 3719 | { \ |
| 3720 | if (nchars_return) \ |
| 3721 | *nchars_return = nchars; \ |
| 3722 | return (retval); \ |
| 3723 | } \ |
| 3724 | c = from[i++]; \ |
| 3725 | } \ |
| 3726 | while (IS_BASE64_IGNORABLE (c)) |
| 3727 | |
| 3728 | /* Table of characters coding the 64 values. */ |
| 3729 | static char base64_value_to_char[64] = |
| 3730 | { |
| 3731 | 'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', /* 0- 9 */ |
| 3732 | 'K', 'L', 'M', 'N', 'O', 'P', 'Q', 'R', 'S', 'T', /* 10-19 */ |
| 3733 | 'U', 'V', 'W', 'X', 'Y', 'Z', 'a', 'b', 'c', 'd', /* 20-29 */ |
| 3734 | 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n', /* 30-39 */ |
| 3735 | 'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', /* 40-49 */ |
| 3736 | 'y', 'z', '0', '1', '2', '3', '4', '5', '6', '7', /* 50-59 */ |
| 3737 | '8', '9', '+', '/' /* 60-63 */ |
| 3738 | }; |
| 3739 | |
| 3740 | /* Table of base64 values for first 128 characters. */ |
| 3741 | static short base64_char_to_value[128] = |
| 3742 | { |
| 3743 | -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, /* 0- 9 */ |
| 3744 | -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, /* 10- 19 */ |
| 3745 | -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, /* 20- 29 */ |
| 3746 | -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, /* 30- 39 */ |
| 3747 | -1, -1, -1, 62, -1, -1, -1, 63, 52, 53, /* 40- 49 */ |
| 3748 | 54, 55, 56, 57, 58, 59, 60, 61, -1, -1, /* 50- 59 */ |
| 3749 | -1, -1, -1, -1, -1, 0, 1, 2, 3, 4, /* 60- 69 */ |
| 3750 | 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, /* 70- 79 */ |
| 3751 | 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, /* 80- 89 */ |
| 3752 | 25, -1, -1, -1, -1, -1, -1, 26, 27, 28, /* 90- 99 */ |
| 3753 | 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, /* 100-109 */ |
| 3754 | 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, /* 110-119 */ |
| 3755 | 49, 50, 51, -1, -1, -1, -1, -1 /* 120-127 */ |
| 3756 | }; |
| 3757 | |
| 3758 | /* The following diagram shows the logical steps by which three octets |
| 3759 | get transformed into four base64 characters. |
| 3760 | |
| 3761 | .--------. .--------. .--------. |
| 3762 | |aaaaaabb| |bbbbcccc| |ccdddddd| |
| 3763 | `--------' `--------' `--------' |
| 3764 | 6 2 4 4 2 6 |
| 3765 | .--------+--------+--------+--------. |
| 3766 | |00aaaaaa|00bbbbbb|00cccccc|00dddddd| |
| 3767 | `--------+--------+--------+--------' |
| 3768 | |
| 3769 | .--------+--------+--------+--------. |
| 3770 | |AAAAAAAA|BBBBBBBB|CCCCCCCC|DDDDDDDD| |
| 3771 | `--------+--------+--------+--------' |
| 3772 | |
| 3773 | The octets are divided into 6 bit chunks, which are then encoded into |
| 3774 | base64 characters. */ |
| 3775 | |
| 3776 | |
| 3777 | static int base64_encode_1 P_ ((const char *, char *, int, int, int)); |
| 3778 | static int base64_decode_1 P_ ((const char *, char *, int, int, int *)); |
| 3779 | |
| 3780 | DEFUN ("base64-encode-region", Fbase64_encode_region, Sbase64_encode_region, |
| 3781 | 2, 3, "r", |
| 3782 | doc: /* Base64-encode the region between BEG and END. |
| 3783 | Return the length of the encoded text. |
| 3784 | Optional third argument NO-LINE-BREAK means do not break long lines |
| 3785 | into shorter lines. */) |
| 3786 | (beg, end, no_line_break) |
| 3787 | Lisp_Object beg, end, no_line_break; |
| 3788 | { |
| 3789 | char *encoded; |
| 3790 | int allength, length; |
| 3791 | int ibeg, iend, encoded_length; |
| 3792 | int old_pos = PT; |
| 3793 | USE_SAFE_ALLOCA; |
| 3794 | |
| 3795 | validate_region (&beg, &end); |
| 3796 | |
| 3797 | ibeg = CHAR_TO_BYTE (XFASTINT (beg)); |
| 3798 | iend = CHAR_TO_BYTE (XFASTINT (end)); |
| 3799 | move_gap_both (XFASTINT (beg), ibeg); |
| 3800 | |
| 3801 | /* We need to allocate enough room for encoding the text. |
| 3802 | We need 33 1/3% more space, plus a newline every 76 |
| 3803 | characters, and then we round up. */ |
| 3804 | length = iend - ibeg; |
| 3805 | allength = length + length/3 + 1; |
| 3806 | allength += allength / MIME_LINE_LENGTH + 1 + 6; |
| 3807 | |
| 3808 | SAFE_ALLOCA (encoded, char *, allength); |
| 3809 | encoded_length = base64_encode_1 (BYTE_POS_ADDR (ibeg), encoded, length, |
| 3810 | NILP (no_line_break), |
| 3811 | !NILP (current_buffer->enable_multibyte_characters)); |
| 3812 | if (encoded_length > allength) |
| 3813 | abort (); |
| 3814 | |
| 3815 | if (encoded_length < 0) |
| 3816 | { |
| 3817 | /* The encoding wasn't possible. */ |
| 3818 | SAFE_FREE (); |
| 3819 | error ("Multibyte character in data for base64 encoding"); |
| 3820 | } |
| 3821 | |
| 3822 | /* Now we have encoded the region, so we insert the new contents |
| 3823 | and delete the old. (Insert first in order to preserve markers.) */ |
| 3824 | SET_PT_BOTH (XFASTINT (beg), ibeg); |
| 3825 | insert (encoded, encoded_length); |
| 3826 | SAFE_FREE (); |
| 3827 | del_range_byte (ibeg + encoded_length, iend + encoded_length, 1); |
| 3828 | |
| 3829 | /* If point was outside of the region, restore it exactly; else just |
| 3830 | move to the beginning of the region. */ |
| 3831 | if (old_pos >= XFASTINT (end)) |
| 3832 | old_pos += encoded_length - (XFASTINT (end) - XFASTINT (beg)); |
| 3833 | else if (old_pos > XFASTINT (beg)) |
| 3834 | old_pos = XFASTINT (beg); |
| 3835 | SET_PT (old_pos); |
| 3836 | |
| 3837 | /* We return the length of the encoded text. */ |
| 3838 | return make_number (encoded_length); |
| 3839 | } |
| 3840 | |
| 3841 | DEFUN ("base64-encode-string", Fbase64_encode_string, Sbase64_encode_string, |
| 3842 | 1, 2, 0, |
| 3843 | doc: /* Base64-encode STRING and return the result. |
| 3844 | Optional second argument NO-LINE-BREAK means do not break long lines |
| 3845 | into shorter lines. */) |
| 3846 | (string, no_line_break) |
| 3847 | Lisp_Object string, no_line_break; |
| 3848 | { |
| 3849 | int allength, length, encoded_length; |
| 3850 | char *encoded; |
| 3851 | Lisp_Object encoded_string; |
| 3852 | USE_SAFE_ALLOCA; |
| 3853 | |
| 3854 | CHECK_STRING (string); |
| 3855 | |
| 3856 | /* We need to allocate enough room for encoding the text. |
| 3857 | We need 33 1/3% more space, plus a newline every 76 |
| 3858 | characters, and then we round up. */ |
| 3859 | length = SBYTES (string); |
| 3860 | allength = length + length/3 + 1; |
| 3861 | allength += allength / MIME_LINE_LENGTH + 1 + 6; |
| 3862 | |
| 3863 | /* We need to allocate enough room for decoding the text. */ |
| 3864 | SAFE_ALLOCA (encoded, char *, allength); |
| 3865 | |
| 3866 | encoded_length = base64_encode_1 (SDATA (string), |
| 3867 | encoded, length, NILP (no_line_break), |
| 3868 | STRING_MULTIBYTE (string)); |
| 3869 | if (encoded_length > allength) |
| 3870 | abort (); |
| 3871 | |
| 3872 | if (encoded_length < 0) |
| 3873 | { |
| 3874 | /* The encoding wasn't possible. */ |
| 3875 | SAFE_FREE (); |
| 3876 | error ("Multibyte character in data for base64 encoding"); |
| 3877 | } |
| 3878 | |
| 3879 | encoded_string = make_unibyte_string (encoded, encoded_length); |
| 3880 | SAFE_FREE (); |
| 3881 | |
| 3882 | return encoded_string; |
| 3883 | } |
| 3884 | |
| 3885 | static int |
| 3886 | base64_encode_1 (from, to, length, line_break, multibyte) |
| 3887 | const char *from; |
| 3888 | char *to; |
| 3889 | int length; |
| 3890 | int line_break; |
| 3891 | int multibyte; |
| 3892 | { |
| 3893 | int counter = 0, i = 0; |
| 3894 | char *e = to; |
| 3895 | int c; |
| 3896 | unsigned int value; |
| 3897 | int bytes; |
| 3898 | |
| 3899 | while (i < length) |
| 3900 | { |
| 3901 | if (multibyte) |
| 3902 | { |
| 3903 | c = STRING_CHAR_AND_LENGTH (from + i, length - i, bytes); |
| 3904 | if (c >= 256) |
| 3905 | return -1; |
| 3906 | i += bytes; |
| 3907 | } |
| 3908 | else |
| 3909 | c = from[i++]; |
| 3910 | |
| 3911 | /* Wrap line every 76 characters. */ |
| 3912 | |
| 3913 | if (line_break) |
| 3914 | { |
| 3915 | if (counter < MIME_LINE_LENGTH / 4) |
| 3916 | counter++; |
| 3917 | else |
| 3918 | { |
| 3919 | *e++ = '\n'; |
| 3920 | counter = 1; |
| 3921 | } |
| 3922 | } |
| 3923 | |
| 3924 | /* Process first byte of a triplet. */ |
| 3925 | |
| 3926 | *e++ = base64_value_to_char[0x3f & c >> 2]; |
| 3927 | value = (0x03 & c) << 4; |
| 3928 | |
| 3929 | /* Process second byte of a triplet. */ |
| 3930 | |
| 3931 | if (i == length) |
| 3932 | { |
| 3933 | *e++ = base64_value_to_char[value]; |
| 3934 | *e++ = '='; |
| 3935 | *e++ = '='; |
| 3936 | break; |
| 3937 | } |
| 3938 | |
| 3939 | if (multibyte) |
| 3940 | { |
| 3941 | c = STRING_CHAR_AND_LENGTH (from + i, length - i, bytes); |
| 3942 | if (c >= 256) |
| 3943 | return -1; |
| 3944 | i += bytes; |
| 3945 | } |
| 3946 | else |
| 3947 | c = from[i++]; |
| 3948 | |
| 3949 | *e++ = base64_value_to_char[value | (0x0f & c >> 4)]; |
| 3950 | value = (0x0f & c) << 2; |
| 3951 | |
| 3952 | /* Process third byte of a triplet. */ |
| 3953 | |
| 3954 | if (i == length) |
| 3955 | { |
| 3956 | *e++ = base64_value_to_char[value]; |
| 3957 | *e++ = '='; |
| 3958 | break; |
| 3959 | } |
| 3960 | |
| 3961 | if (multibyte) |
| 3962 | { |
| 3963 | c = STRING_CHAR_AND_LENGTH (from + i, length - i, bytes); |
| 3964 | if (c >= 256) |
| 3965 | return -1; |
| 3966 | i += bytes; |
| 3967 | } |
| 3968 | else |
| 3969 | c = from[i++]; |
| 3970 | |
| 3971 | *e++ = base64_value_to_char[value | (0x03 & c >> 6)]; |
| 3972 | *e++ = base64_value_to_char[0x3f & c]; |
| 3973 | } |
| 3974 | |
| 3975 | return e - to; |
| 3976 | } |
| 3977 | |
| 3978 | |
| 3979 | DEFUN ("base64-decode-region", Fbase64_decode_region, Sbase64_decode_region, |
| 3980 | 2, 2, "r", |
| 3981 | doc: /* Base64-decode the region between BEG and END. |
| 3982 | Return the length of the decoded text. |
| 3983 | If the region can't be decoded, signal an error and don't modify the buffer. */) |
| 3984 | (beg, end) |
| 3985 | Lisp_Object beg, end; |
| 3986 | { |
| 3987 | int ibeg, iend, length, allength; |
| 3988 | char *decoded; |
| 3989 | int old_pos = PT; |
| 3990 | int decoded_length; |
| 3991 | int inserted_chars; |
| 3992 | int multibyte = !NILP (current_buffer->enable_multibyte_characters); |
| 3993 | USE_SAFE_ALLOCA; |
| 3994 | |
| 3995 | validate_region (&beg, &end); |
| 3996 | |
| 3997 | ibeg = CHAR_TO_BYTE (XFASTINT (beg)); |
| 3998 | iend = CHAR_TO_BYTE (XFASTINT (end)); |
| 3999 | |
| 4000 | length = iend - ibeg; |
| 4001 | |
| 4002 | /* We need to allocate enough room for decoding the text. If we are |
| 4003 | working on a multibyte buffer, each decoded code may occupy at |
| 4004 | most two bytes. */ |
| 4005 | allength = multibyte ? length * 2 : length; |
| 4006 | SAFE_ALLOCA (decoded, char *, allength); |
| 4007 | |
| 4008 | move_gap_both (XFASTINT (beg), ibeg); |
| 4009 | decoded_length = base64_decode_1 (BYTE_POS_ADDR (ibeg), decoded, length, |
| 4010 | multibyte, &inserted_chars); |
| 4011 | if (decoded_length > allength) |
| 4012 | abort (); |
| 4013 | |
| 4014 | if (decoded_length < 0) |
| 4015 | { |
| 4016 | /* The decoding wasn't possible. */ |
| 4017 | SAFE_FREE (); |
| 4018 | error ("Invalid base64 data"); |
| 4019 | } |
| 4020 | |
| 4021 | /* Now we have decoded the region, so we insert the new contents |
| 4022 | and delete the old. (Insert first in order to preserve markers.) */ |
| 4023 | TEMP_SET_PT_BOTH (XFASTINT (beg), ibeg); |
| 4024 | insert_1_both (decoded, inserted_chars, decoded_length, 0, 1, 0); |
| 4025 | SAFE_FREE (); |
| 4026 | |
| 4027 | /* Delete the original text. */ |
| 4028 | del_range_both (PT, PT_BYTE, XFASTINT (end) + inserted_chars, |
| 4029 | iend + decoded_length, 1); |
| 4030 | |
| 4031 | /* If point was outside of the region, restore it exactly; else just |
| 4032 | move to the beginning of the region. */ |
| 4033 | if (old_pos >= XFASTINT (end)) |
| 4034 | old_pos += inserted_chars - (XFASTINT (end) - XFASTINT (beg)); |
| 4035 | else if (old_pos > XFASTINT (beg)) |
| 4036 | old_pos = XFASTINT (beg); |
| 4037 | SET_PT (old_pos > ZV ? ZV : old_pos); |
| 4038 | |
| 4039 | return make_number (inserted_chars); |
| 4040 | } |
| 4041 | |
| 4042 | DEFUN ("base64-decode-string", Fbase64_decode_string, Sbase64_decode_string, |
| 4043 | 1, 1, 0, |
| 4044 | doc: /* Base64-decode STRING and return the result. */) |
| 4045 | (string) |
| 4046 | Lisp_Object string; |
| 4047 | { |
| 4048 | char *decoded; |
| 4049 | int length, decoded_length; |
| 4050 | Lisp_Object decoded_string; |
| 4051 | USE_SAFE_ALLOCA; |
| 4052 | |
| 4053 | CHECK_STRING (string); |
| 4054 | |
| 4055 | length = SBYTES (string); |
| 4056 | /* We need to allocate enough room for decoding the text. */ |
| 4057 | SAFE_ALLOCA (decoded, char *, length); |
| 4058 | |
| 4059 | /* The decoded result should be unibyte. */ |
| 4060 | decoded_length = base64_decode_1 (SDATA (string), decoded, length, |
| 4061 | 0, NULL); |
| 4062 | if (decoded_length > length) |
| 4063 | abort (); |
| 4064 | else if (decoded_length >= 0) |
| 4065 | decoded_string = make_unibyte_string (decoded, decoded_length); |
| 4066 | else |
| 4067 | decoded_string = Qnil; |
| 4068 | |
| 4069 | SAFE_FREE (); |
| 4070 | if (!STRINGP (decoded_string)) |
| 4071 | error ("Invalid base64 data"); |
| 4072 | |
| 4073 | return decoded_string; |
| 4074 | } |
| 4075 | |
| 4076 | /* Base64-decode the data at FROM of LENGHT bytes into TO. If |
| 4077 | MULTIBYTE is nonzero, the decoded result should be in multibyte |
| 4078 | form. If NCHARS_RETRUN is not NULL, store the number of produced |
| 4079 | characters in *NCHARS_RETURN. */ |
| 4080 | |
| 4081 | static int |
| 4082 | base64_decode_1 (from, to, length, multibyte, nchars_return) |
| 4083 | const char *from; |
| 4084 | char *to; |
| 4085 | int length; |
| 4086 | int multibyte; |
| 4087 | int *nchars_return; |
| 4088 | { |
| 4089 | int i = 0; |
| 4090 | char *e = to; |
| 4091 | unsigned char c; |
| 4092 | unsigned long value; |
| 4093 | int nchars = 0; |
| 4094 | |
| 4095 | while (1) |
| 4096 | { |
| 4097 | /* Process first byte of a quadruplet. */ |
| 4098 | |
| 4099 | READ_QUADRUPLET_BYTE (e-to); |
| 4100 | |
| 4101 | if (!IS_BASE64 (c)) |
| 4102 | return -1; |
| 4103 | value = base64_char_to_value[c] << 18; |
| 4104 | |
| 4105 | /* Process second byte of a quadruplet. */ |
| 4106 | |
| 4107 | READ_QUADRUPLET_BYTE (-1); |
| 4108 | |
| 4109 | if (!IS_BASE64 (c)) |
| 4110 | return -1; |
| 4111 | value |= base64_char_to_value[c] << 12; |
| 4112 | |
| 4113 | c = (unsigned char) (value >> 16); |
| 4114 | if (multibyte) |
| 4115 | e += CHAR_STRING (c, e); |
| 4116 | else |
| 4117 | *e++ = c; |
| 4118 | nchars++; |
| 4119 | |
| 4120 | /* Process third byte of a quadruplet. */ |
| 4121 | |
| 4122 | READ_QUADRUPLET_BYTE (-1); |
| 4123 | |
| 4124 | if (c == '=') |
| 4125 | { |
| 4126 | READ_QUADRUPLET_BYTE (-1); |
| 4127 | |
| 4128 | if (c != '=') |
| 4129 | return -1; |
| 4130 | continue; |
| 4131 | } |
| 4132 | |
| 4133 | if (!IS_BASE64 (c)) |
| 4134 | return -1; |
| 4135 | value |= base64_char_to_value[c] << 6; |
| 4136 | |
| 4137 | c = (unsigned char) (0xff & value >> 8); |
| 4138 | if (multibyte) |
| 4139 | e += CHAR_STRING (c, e); |
| 4140 | else |
| 4141 | *e++ = c; |
| 4142 | nchars++; |
| 4143 | |
| 4144 | /* Process fourth byte of a quadruplet. */ |
| 4145 | |
| 4146 | READ_QUADRUPLET_BYTE (-1); |
| 4147 | |
| 4148 | if (c == '=') |
| 4149 | continue; |
| 4150 | |
| 4151 | if (!IS_BASE64 (c)) |
| 4152 | return -1; |
| 4153 | value |= base64_char_to_value[c]; |
| 4154 | |
| 4155 | c = (unsigned char) (0xff & value); |
| 4156 | if (multibyte) |
| 4157 | e += CHAR_STRING (c, e); |
| 4158 | else |
| 4159 | *e++ = c; |
| 4160 | nchars++; |
| 4161 | } |
| 4162 | } |
| 4163 | |
| 4164 | |
| 4165 | \f |
| 4166 | /*********************************************************************** |
| 4167 | ***** ***** |
| 4168 | ***** Hash Tables ***** |
| 4169 | ***** ***** |
| 4170 | ***********************************************************************/ |
| 4171 | |
| 4172 | /* Implemented by gerd@gnu.org. This hash table implementation was |
| 4173 | inspired by CMUCL hash tables. */ |
| 4174 | |
| 4175 | /* Ideas: |
| 4176 | |
| 4177 | 1. For small tables, association lists are probably faster than |
| 4178 | hash tables because they have lower overhead. |
| 4179 | |
| 4180 | For uses of hash tables where the O(1) behavior of table |
| 4181 | operations is not a requirement, it might therefore be a good idea |
| 4182 | not to hash. Instead, we could just do a linear search in the |
| 4183 | key_and_value vector of the hash table. This could be done |
| 4184 | if a `:linear-search t' argument is given to make-hash-table. */ |
| 4185 | |
| 4186 | |
| 4187 | /* The list of all weak hash tables. Don't staticpro this one. */ |
| 4188 | |
| 4189 | Lisp_Object Vweak_hash_tables; |
| 4190 | |
| 4191 | /* Various symbols. */ |
| 4192 | |
| 4193 | Lisp_Object Qhash_table_p, Qeq, Qeql, Qequal, Qkey, Qvalue; |
| 4194 | Lisp_Object QCtest, QCsize, QCrehash_size, QCrehash_threshold, QCweakness; |
| 4195 | Lisp_Object Qhash_table_test, Qkey_or_value, Qkey_and_value; |
| 4196 | |
| 4197 | /* Function prototypes. */ |
| 4198 | |
| 4199 | static struct Lisp_Hash_Table *check_hash_table P_ ((Lisp_Object)); |
| 4200 | static int get_key_arg P_ ((Lisp_Object, int, Lisp_Object *, char *)); |
| 4201 | static void maybe_resize_hash_table P_ ((struct Lisp_Hash_Table *)); |
| 4202 | static int cmpfn_eql P_ ((struct Lisp_Hash_Table *, Lisp_Object, unsigned, |
| 4203 | Lisp_Object, unsigned)); |
| 4204 | static int cmpfn_equal P_ ((struct Lisp_Hash_Table *, Lisp_Object, unsigned, |
| 4205 | Lisp_Object, unsigned)); |
| 4206 | static int cmpfn_user_defined P_ ((struct Lisp_Hash_Table *, Lisp_Object, |
| 4207 | unsigned, Lisp_Object, unsigned)); |
| 4208 | static unsigned hashfn_eq P_ ((struct Lisp_Hash_Table *, Lisp_Object)); |
| 4209 | static unsigned hashfn_eql P_ ((struct Lisp_Hash_Table *, Lisp_Object)); |
| 4210 | static unsigned hashfn_equal P_ ((struct Lisp_Hash_Table *, Lisp_Object)); |
| 4211 | static unsigned hashfn_user_defined P_ ((struct Lisp_Hash_Table *, |
| 4212 | Lisp_Object)); |
| 4213 | static unsigned sxhash_string P_ ((unsigned char *, int)); |
| 4214 | static unsigned sxhash_list P_ ((Lisp_Object, int)); |
| 4215 | static unsigned sxhash_vector P_ ((Lisp_Object, int)); |
| 4216 | static unsigned sxhash_bool_vector P_ ((Lisp_Object)); |
| 4217 | static int sweep_weak_table P_ ((struct Lisp_Hash_Table *, int)); |
| 4218 | |
| 4219 | |
| 4220 | \f |
| 4221 | /*********************************************************************** |
| 4222 | Utilities |
| 4223 | ***********************************************************************/ |
| 4224 | |
| 4225 | /* If OBJ is a Lisp hash table, return a pointer to its struct |
| 4226 | Lisp_Hash_Table. Otherwise, signal an error. */ |
| 4227 | |
| 4228 | static struct Lisp_Hash_Table * |
| 4229 | check_hash_table (obj) |
| 4230 | Lisp_Object obj; |
| 4231 | { |
| 4232 | CHECK_HASH_TABLE (obj); |
| 4233 | return XHASH_TABLE (obj); |
| 4234 | } |
| 4235 | |
| 4236 | |
| 4237 | /* Value is the next integer I >= N, N >= 0 which is "almost" a prime |
| 4238 | number. */ |
| 4239 | |
| 4240 | int |
| 4241 | next_almost_prime (n) |
| 4242 | int n; |
| 4243 | { |
| 4244 | if (n % 2 == 0) |
| 4245 | n += 1; |
| 4246 | if (n % 3 == 0) |
| 4247 | n += 2; |
| 4248 | if (n % 7 == 0) |
| 4249 | n += 4; |
| 4250 | return n; |
| 4251 | } |
| 4252 | |
| 4253 | |
| 4254 | /* Find KEY in ARGS which has size NARGS. Don't consider indices for |
| 4255 | which USED[I] is non-zero. If found at index I in ARGS, set |
| 4256 | USED[I] and USED[I + 1] to 1, and return I + 1. Otherwise return |
| 4257 | -1. This function is used to extract a keyword/argument pair from |
| 4258 | a DEFUN parameter list. */ |
| 4259 | |
| 4260 | static int |
| 4261 | get_key_arg (key, nargs, args, used) |
| 4262 | Lisp_Object key; |
| 4263 | int nargs; |
| 4264 | Lisp_Object *args; |
| 4265 | char *used; |
| 4266 | { |
| 4267 | int i; |
| 4268 | |
| 4269 | for (i = 0; i < nargs - 1; ++i) |
| 4270 | if (!used[i] && EQ (args[i], key)) |
| 4271 | break; |
| 4272 | |
| 4273 | if (i >= nargs - 1) |
| 4274 | i = -1; |
| 4275 | else |
| 4276 | { |
| 4277 | used[i++] = 1; |
| 4278 | used[i] = 1; |
| 4279 | } |
| 4280 | |
| 4281 | return i; |
| 4282 | } |
| 4283 | |
| 4284 | |
| 4285 | /* Return a Lisp vector which has the same contents as VEC but has |
| 4286 | size NEW_SIZE, NEW_SIZE >= VEC->size. Entries in the resulting |
| 4287 | vector that are not copied from VEC are set to INIT. */ |
| 4288 | |
| 4289 | Lisp_Object |
| 4290 | larger_vector (vec, new_size, init) |
| 4291 | Lisp_Object vec; |
| 4292 | int new_size; |
| 4293 | Lisp_Object init; |
| 4294 | { |
| 4295 | struct Lisp_Vector *v; |
| 4296 | int i, old_size; |
| 4297 | |
| 4298 | xassert (VECTORP (vec)); |
| 4299 | old_size = XVECTOR (vec)->size; |
| 4300 | xassert (new_size >= old_size); |
| 4301 | |
| 4302 | v = allocate_vector (new_size); |
| 4303 | bcopy (XVECTOR (vec)->contents, v->contents, |
| 4304 | old_size * sizeof *v->contents); |
| 4305 | for (i = old_size; i < new_size; ++i) |
| 4306 | v->contents[i] = init; |
| 4307 | XSETVECTOR (vec, v); |
| 4308 | return vec; |
| 4309 | } |
| 4310 | |
| 4311 | |
| 4312 | /*********************************************************************** |
| 4313 | Low-level Functions |
| 4314 | ***********************************************************************/ |
| 4315 | |
| 4316 | /* Compare KEY1 which has hash code HASH1 and KEY2 with hash code |
| 4317 | HASH2 in hash table H using `eql'. Value is non-zero if KEY1 and |
| 4318 | KEY2 are the same. */ |
| 4319 | |
| 4320 | static int |
| 4321 | cmpfn_eql (h, key1, hash1, key2, hash2) |
| 4322 | struct Lisp_Hash_Table *h; |
| 4323 | Lisp_Object key1, key2; |
| 4324 | unsigned hash1, hash2; |
| 4325 | { |
| 4326 | return (FLOATP (key1) |
| 4327 | && FLOATP (key2) |
| 4328 | && XFLOAT_DATA (key1) == XFLOAT_DATA (key2)); |
| 4329 | } |
| 4330 | |
| 4331 | |
| 4332 | /* Compare KEY1 which has hash code HASH1 and KEY2 with hash code |
| 4333 | HASH2 in hash table H using `equal'. Value is non-zero if KEY1 and |
| 4334 | KEY2 are the same. */ |
| 4335 | |
| 4336 | static int |
| 4337 | cmpfn_equal (h, key1, hash1, key2, hash2) |
| 4338 | struct Lisp_Hash_Table *h; |
| 4339 | Lisp_Object key1, key2; |
| 4340 | unsigned hash1, hash2; |
| 4341 | { |
| 4342 | return hash1 == hash2 && !NILP (Fequal (key1, key2)); |
| 4343 | } |
| 4344 | |
| 4345 | |
| 4346 | /* Compare KEY1 which has hash code HASH1, and KEY2 with hash code |
| 4347 | HASH2 in hash table H using H->user_cmp_function. Value is non-zero |
| 4348 | if KEY1 and KEY2 are the same. */ |
| 4349 | |
| 4350 | static int |
| 4351 | cmpfn_user_defined (h, key1, hash1, key2, hash2) |
| 4352 | struct Lisp_Hash_Table *h; |
| 4353 | Lisp_Object key1, key2; |
| 4354 | unsigned hash1, hash2; |
| 4355 | { |
| 4356 | if (hash1 == hash2) |
| 4357 | { |
| 4358 | Lisp_Object args[3]; |
| 4359 | |
| 4360 | args[0] = h->user_cmp_function; |
| 4361 | args[1] = key1; |
| 4362 | args[2] = key2; |
| 4363 | return !NILP (Ffuncall (3, args)); |
| 4364 | } |
| 4365 | else |
| 4366 | return 0; |
| 4367 | } |
| 4368 | |
| 4369 | |
| 4370 | /* Value is a hash code for KEY for use in hash table H which uses |
| 4371 | `eq' to compare keys. The hash code returned is guaranteed to fit |
| 4372 | in a Lisp integer. */ |
| 4373 | |
| 4374 | static unsigned |
| 4375 | hashfn_eq (h, key) |
| 4376 | struct Lisp_Hash_Table *h; |
| 4377 | Lisp_Object key; |
| 4378 | { |
| 4379 | unsigned hash = XUINT (key) ^ XGCTYPE (key); |
| 4380 | xassert ((hash & ~INTMASK) == 0); |
| 4381 | return hash; |
| 4382 | } |
| 4383 | |
| 4384 | |
| 4385 | /* Value is a hash code for KEY for use in hash table H which uses |
| 4386 | `eql' to compare keys. The hash code returned is guaranteed to fit |
| 4387 | in a Lisp integer. */ |
| 4388 | |
| 4389 | static unsigned |
| 4390 | hashfn_eql (h, key) |
| 4391 | struct Lisp_Hash_Table *h; |
| 4392 | Lisp_Object key; |
| 4393 | { |
| 4394 | unsigned hash; |
| 4395 | if (FLOATP (key)) |
| 4396 | hash = sxhash (key, 0); |
| 4397 | else |
| 4398 | hash = XUINT (key) ^ XGCTYPE (key); |
| 4399 | xassert ((hash & ~INTMASK) == 0); |
| 4400 | return hash; |
| 4401 | } |
| 4402 | |
| 4403 | |
| 4404 | /* Value is a hash code for KEY for use in hash table H which uses |
| 4405 | `equal' to compare keys. The hash code returned is guaranteed to fit |
| 4406 | in a Lisp integer. */ |
| 4407 | |
| 4408 | static unsigned |
| 4409 | hashfn_equal (h, key) |
| 4410 | struct Lisp_Hash_Table *h; |
| 4411 | Lisp_Object key; |
| 4412 | { |
| 4413 | unsigned hash = sxhash (key, 0); |
| 4414 | xassert ((hash & ~INTMASK) == 0); |
| 4415 | return hash; |
| 4416 | } |
| 4417 | |
| 4418 | |
| 4419 | /* Value is a hash code for KEY for use in hash table H which uses as |
| 4420 | user-defined function to compare keys. The hash code returned is |
| 4421 | guaranteed to fit in a Lisp integer. */ |
| 4422 | |
| 4423 | static unsigned |
| 4424 | hashfn_user_defined (h, key) |
| 4425 | struct Lisp_Hash_Table *h; |
| 4426 | Lisp_Object key; |
| 4427 | { |
| 4428 | Lisp_Object args[2], hash; |
| 4429 | |
| 4430 | args[0] = h->user_hash_function; |
| 4431 | args[1] = key; |
| 4432 | hash = Ffuncall (2, args); |
| 4433 | if (!INTEGERP (hash)) |
| 4434 | Fsignal (Qerror, |
| 4435 | list2 (build_string ("Invalid hash code returned from \ |
| 4436 | user-supplied hash function"), |
| 4437 | hash)); |
| 4438 | return XUINT (hash); |
| 4439 | } |
| 4440 | |
| 4441 | |
| 4442 | /* Create and initialize a new hash table. |
| 4443 | |
| 4444 | TEST specifies the test the hash table will use to compare keys. |
| 4445 | It must be either one of the predefined tests `eq', `eql' or |
| 4446 | `equal' or a symbol denoting a user-defined test named TEST with |
| 4447 | test and hash functions USER_TEST and USER_HASH. |
| 4448 | |
| 4449 | Give the table initial capacity SIZE, SIZE >= 0, an integer. |
| 4450 | |
| 4451 | If REHASH_SIZE is an integer, it must be > 0, and this hash table's |
| 4452 | new size when it becomes full is computed by adding REHASH_SIZE to |
| 4453 | its old size. If REHASH_SIZE is a float, it must be > 1.0, and the |
| 4454 | table's new size is computed by multiplying its old size with |
| 4455 | REHASH_SIZE. |
| 4456 | |
| 4457 | REHASH_THRESHOLD must be a float <= 1.0, and > 0. The table will |
| 4458 | be resized when the ratio of (number of entries in the table) / |
| 4459 | (table size) is >= REHASH_THRESHOLD. |
| 4460 | |
| 4461 | WEAK specifies the weakness of the table. If non-nil, it must be |
| 4462 | one of the symbols `key', `value', `key-or-value', or `key-and-value'. */ |
| 4463 | |
| 4464 | Lisp_Object |
| 4465 | make_hash_table (test, size, rehash_size, rehash_threshold, weak, |
| 4466 | user_test, user_hash) |
| 4467 | Lisp_Object test, size, rehash_size, rehash_threshold, weak; |
| 4468 | Lisp_Object user_test, user_hash; |
| 4469 | { |
| 4470 | struct Lisp_Hash_Table *h; |
| 4471 | Lisp_Object table; |
| 4472 | int index_size, i, sz; |
| 4473 | |
| 4474 | /* Preconditions. */ |
| 4475 | xassert (SYMBOLP (test)); |
| 4476 | xassert (INTEGERP (size) && XINT (size) >= 0); |
| 4477 | xassert ((INTEGERP (rehash_size) && XINT (rehash_size) > 0) |
| 4478 | || (FLOATP (rehash_size) && XFLOATINT (rehash_size) > 1.0)); |
| 4479 | xassert (FLOATP (rehash_threshold) |
| 4480 | && XFLOATINT (rehash_threshold) > 0 |
| 4481 | && XFLOATINT (rehash_threshold) <= 1.0); |
| 4482 | |
| 4483 | if (XFASTINT (size) == 0) |
| 4484 | size = make_number (1); |
| 4485 | |
| 4486 | /* Allocate a table and initialize it. */ |
| 4487 | h = allocate_hash_table (); |
| 4488 | |
| 4489 | /* Initialize hash table slots. */ |
| 4490 | sz = XFASTINT (size); |
| 4491 | |
| 4492 | h->test = test; |
| 4493 | if (EQ (test, Qeql)) |
| 4494 | { |
| 4495 | h->cmpfn = cmpfn_eql; |
| 4496 | h->hashfn = hashfn_eql; |
| 4497 | } |
| 4498 | else if (EQ (test, Qeq)) |
| 4499 | { |
| 4500 | h->cmpfn = NULL; |
| 4501 | h->hashfn = hashfn_eq; |
| 4502 | } |
| 4503 | else if (EQ (test, Qequal)) |
| 4504 | { |
| 4505 | h->cmpfn = cmpfn_equal; |
| 4506 | h->hashfn = hashfn_equal; |
| 4507 | } |
| 4508 | else |
| 4509 | { |
| 4510 | h->user_cmp_function = user_test; |
| 4511 | h->user_hash_function = user_hash; |
| 4512 | h->cmpfn = cmpfn_user_defined; |
| 4513 | h->hashfn = hashfn_user_defined; |
| 4514 | } |
| 4515 | |
| 4516 | h->weak = weak; |
| 4517 | h->rehash_threshold = rehash_threshold; |
| 4518 | h->rehash_size = rehash_size; |
| 4519 | h->count = make_number (0); |
| 4520 | h->key_and_value = Fmake_vector (make_number (2 * sz), Qnil); |
| 4521 | h->hash = Fmake_vector (size, Qnil); |
| 4522 | h->next = Fmake_vector (size, Qnil); |
| 4523 | /* Cast to int here avoids losing with gcc 2.95 on Tru64/Alpha... */ |
| 4524 | index_size = next_almost_prime ((int) (sz / XFLOATINT (rehash_threshold))); |
| 4525 | h->index = Fmake_vector (make_number (index_size), Qnil); |
| 4526 | |
| 4527 | /* Set up the free list. */ |
| 4528 | for (i = 0; i < sz - 1; ++i) |
| 4529 | HASH_NEXT (h, i) = make_number (i + 1); |
| 4530 | h->next_free = make_number (0); |
| 4531 | |
| 4532 | XSET_HASH_TABLE (table, h); |
| 4533 | xassert (HASH_TABLE_P (table)); |
| 4534 | xassert (XHASH_TABLE (table) == h); |
| 4535 | |
| 4536 | /* Maybe add this hash table to the list of all weak hash tables. */ |
| 4537 | if (NILP (h->weak)) |
| 4538 | h->next_weak = Qnil; |
| 4539 | else |
| 4540 | { |
| 4541 | h->next_weak = Vweak_hash_tables; |
| 4542 | Vweak_hash_tables = table; |
| 4543 | } |
| 4544 | |
| 4545 | return table; |
| 4546 | } |
| 4547 | |
| 4548 | |
| 4549 | /* Return a copy of hash table H1. Keys and values are not copied, |
| 4550 | only the table itself is. */ |
| 4551 | |
| 4552 | Lisp_Object |
| 4553 | copy_hash_table (h1) |
| 4554 | struct Lisp_Hash_Table *h1; |
| 4555 | { |
| 4556 | Lisp_Object table; |
| 4557 | struct Lisp_Hash_Table *h2; |
| 4558 | struct Lisp_Vector *next; |
| 4559 | |
| 4560 | h2 = allocate_hash_table (); |
| 4561 | next = h2->vec_next; |
| 4562 | bcopy (h1, h2, sizeof *h2); |
| 4563 | h2->vec_next = next; |
| 4564 | h2->key_and_value = Fcopy_sequence (h1->key_and_value); |
| 4565 | h2->hash = Fcopy_sequence (h1->hash); |
| 4566 | h2->next = Fcopy_sequence (h1->next); |
| 4567 | h2->index = Fcopy_sequence (h1->index); |
| 4568 | XSET_HASH_TABLE (table, h2); |
| 4569 | |
| 4570 | /* Maybe add this hash table to the list of all weak hash tables. */ |
| 4571 | if (!NILP (h2->weak)) |
| 4572 | { |
| 4573 | h2->next_weak = Vweak_hash_tables; |
| 4574 | Vweak_hash_tables = table; |
| 4575 | } |
| 4576 | |
| 4577 | return table; |
| 4578 | } |
| 4579 | |
| 4580 | |
| 4581 | /* Resize hash table H if it's too full. If H cannot be resized |
| 4582 | because it's already too large, throw an error. */ |
| 4583 | |
| 4584 | static INLINE void |
| 4585 | maybe_resize_hash_table (h) |
| 4586 | struct Lisp_Hash_Table *h; |
| 4587 | { |
| 4588 | if (NILP (h->next_free)) |
| 4589 | { |
| 4590 | int old_size = HASH_TABLE_SIZE (h); |
| 4591 | int i, new_size, index_size; |
| 4592 | |
| 4593 | if (INTEGERP (h->rehash_size)) |
| 4594 | new_size = old_size + XFASTINT (h->rehash_size); |
| 4595 | else |
| 4596 | new_size = old_size * XFLOATINT (h->rehash_size); |
| 4597 | new_size = max (old_size + 1, new_size); |
| 4598 | index_size = next_almost_prime ((int) |
| 4599 | (new_size |
| 4600 | / XFLOATINT (h->rehash_threshold))); |
| 4601 | if (max (index_size, 2 * new_size) > MOST_POSITIVE_FIXNUM) |
| 4602 | error ("Hash table too large to resize"); |
| 4603 | |
| 4604 | h->key_and_value = larger_vector (h->key_and_value, 2 * new_size, Qnil); |
| 4605 | h->next = larger_vector (h->next, new_size, Qnil); |
| 4606 | h->hash = larger_vector (h->hash, new_size, Qnil); |
| 4607 | h->index = Fmake_vector (make_number (index_size), Qnil); |
| 4608 | |
| 4609 | /* Update the free list. Do it so that new entries are added at |
| 4610 | the end of the free list. This makes some operations like |
| 4611 | maphash faster. */ |
| 4612 | for (i = old_size; i < new_size - 1; ++i) |
| 4613 | HASH_NEXT (h, i) = make_number (i + 1); |
| 4614 | |
| 4615 | if (!NILP (h->next_free)) |
| 4616 | { |
| 4617 | Lisp_Object last, next; |
| 4618 | |
| 4619 | last = h->next_free; |
| 4620 | while (next = HASH_NEXT (h, XFASTINT (last)), |
| 4621 | !NILP (next)) |
| 4622 | last = next; |
| 4623 | |
| 4624 | HASH_NEXT (h, XFASTINT (last)) = make_number (old_size); |
| 4625 | } |
| 4626 | else |
| 4627 | XSETFASTINT (h->next_free, old_size); |
| 4628 | |
| 4629 | /* Rehash. */ |
| 4630 | for (i = 0; i < old_size; ++i) |
| 4631 | if (!NILP (HASH_HASH (h, i))) |
| 4632 | { |
| 4633 | unsigned hash_code = XUINT (HASH_HASH (h, i)); |
| 4634 | int start_of_bucket = hash_code % XVECTOR (h->index)->size; |
| 4635 | HASH_NEXT (h, i) = HASH_INDEX (h, start_of_bucket); |
| 4636 | HASH_INDEX (h, start_of_bucket) = make_number (i); |
| 4637 | } |
| 4638 | } |
| 4639 | } |
| 4640 | |
| 4641 | |
| 4642 | /* Lookup KEY in hash table H. If HASH is non-null, return in *HASH |
| 4643 | the hash code of KEY. Value is the index of the entry in H |
| 4644 | matching KEY, or -1 if not found. */ |
| 4645 | |
| 4646 | int |
| 4647 | hash_lookup (h, key, hash) |
| 4648 | struct Lisp_Hash_Table *h; |
| 4649 | Lisp_Object key; |
| 4650 | unsigned *hash; |
| 4651 | { |
| 4652 | unsigned hash_code; |
| 4653 | int start_of_bucket; |
| 4654 | Lisp_Object idx; |
| 4655 | |
| 4656 | hash_code = h->hashfn (h, key); |
| 4657 | if (hash) |
| 4658 | *hash = hash_code; |
| 4659 | |
| 4660 | start_of_bucket = hash_code % XVECTOR (h->index)->size; |
| 4661 | idx = HASH_INDEX (h, start_of_bucket); |
| 4662 | |
| 4663 | /* We need not gcpro idx since it's either an integer or nil. */ |
| 4664 | while (!NILP (idx)) |
| 4665 | { |
| 4666 | int i = XFASTINT (idx); |
| 4667 | if (EQ (key, HASH_KEY (h, i)) |
| 4668 | || (h->cmpfn |
| 4669 | && h->cmpfn (h, key, hash_code, |
| 4670 | HASH_KEY (h, i), XUINT (HASH_HASH (h, i))))) |
| 4671 | break; |
| 4672 | idx = HASH_NEXT (h, i); |
| 4673 | } |
| 4674 | |
| 4675 | return NILP (idx) ? -1 : XFASTINT (idx); |
| 4676 | } |
| 4677 | |
| 4678 | |
| 4679 | /* Put an entry into hash table H that associates KEY with VALUE. |
| 4680 | HASH is a previously computed hash code of KEY. |
| 4681 | Value is the index of the entry in H matching KEY. */ |
| 4682 | |
| 4683 | int |
| 4684 | hash_put (h, key, value, hash) |
| 4685 | struct Lisp_Hash_Table *h; |
| 4686 | Lisp_Object key, value; |
| 4687 | unsigned hash; |
| 4688 | { |
| 4689 | int start_of_bucket, i; |
| 4690 | |
| 4691 | xassert ((hash & ~INTMASK) == 0); |
| 4692 | |
| 4693 | /* Increment count after resizing because resizing may fail. */ |
| 4694 | maybe_resize_hash_table (h); |
| 4695 | h->count = make_number (XFASTINT (h->count) + 1); |
| 4696 | |
| 4697 | /* Store key/value in the key_and_value vector. */ |
| 4698 | i = XFASTINT (h->next_free); |
| 4699 | h->next_free = HASH_NEXT (h, i); |
| 4700 | HASH_KEY (h, i) = key; |
| 4701 | HASH_VALUE (h, i) = value; |
| 4702 | |
| 4703 | /* Remember its hash code. */ |
| 4704 | HASH_HASH (h, i) = make_number (hash); |
| 4705 | |
| 4706 | /* Add new entry to its collision chain. */ |
| 4707 | start_of_bucket = hash % XVECTOR (h->index)->size; |
| 4708 | HASH_NEXT (h, i) = HASH_INDEX (h, start_of_bucket); |
| 4709 | HASH_INDEX (h, start_of_bucket) = make_number (i); |
| 4710 | return i; |
| 4711 | } |
| 4712 | |
| 4713 | |
| 4714 | /* Remove the entry matching KEY from hash table H, if there is one. */ |
| 4715 | |
| 4716 | void |
| 4717 | hash_remove (h, key) |
| 4718 | struct Lisp_Hash_Table *h; |
| 4719 | Lisp_Object key; |
| 4720 | { |
| 4721 | unsigned hash_code; |
| 4722 | int start_of_bucket; |
| 4723 | Lisp_Object idx, prev; |
| 4724 | |
| 4725 | hash_code = h->hashfn (h, key); |
| 4726 | start_of_bucket = hash_code % XVECTOR (h->index)->size; |
| 4727 | idx = HASH_INDEX (h, start_of_bucket); |
| 4728 | prev = Qnil; |
| 4729 | |
| 4730 | /* We need not gcpro idx, prev since they're either integers or nil. */ |
| 4731 | while (!NILP (idx)) |
| 4732 | { |
| 4733 | int i = XFASTINT (idx); |
| 4734 | |
| 4735 | if (EQ (key, HASH_KEY (h, i)) |
| 4736 | || (h->cmpfn |
| 4737 | && h->cmpfn (h, key, hash_code, |
| 4738 | HASH_KEY (h, i), XUINT (HASH_HASH (h, i))))) |
| 4739 | { |
| 4740 | /* Take entry out of collision chain. */ |
| 4741 | if (NILP (prev)) |
| 4742 | HASH_INDEX (h, start_of_bucket) = HASH_NEXT (h, i); |
| 4743 | else |
| 4744 | HASH_NEXT (h, XFASTINT (prev)) = HASH_NEXT (h, i); |
| 4745 | |
| 4746 | /* Clear slots in key_and_value and add the slots to |
| 4747 | the free list. */ |
| 4748 | HASH_KEY (h, i) = HASH_VALUE (h, i) = HASH_HASH (h, i) = Qnil; |
| 4749 | HASH_NEXT (h, i) = h->next_free; |
| 4750 | h->next_free = make_number (i); |
| 4751 | h->count = make_number (XFASTINT (h->count) - 1); |
| 4752 | xassert (XINT (h->count) >= 0); |
| 4753 | break; |
| 4754 | } |
| 4755 | else |
| 4756 | { |
| 4757 | prev = idx; |
| 4758 | idx = HASH_NEXT (h, i); |
| 4759 | } |
| 4760 | } |
| 4761 | } |
| 4762 | |
| 4763 | |
| 4764 | /* Clear hash table H. */ |
| 4765 | |
| 4766 | void |
| 4767 | hash_clear (h) |
| 4768 | struct Lisp_Hash_Table *h; |
| 4769 | { |
| 4770 | if (XFASTINT (h->count) > 0) |
| 4771 | { |
| 4772 | int i, size = HASH_TABLE_SIZE (h); |
| 4773 | |
| 4774 | for (i = 0; i < size; ++i) |
| 4775 | { |
| 4776 | HASH_NEXT (h, i) = i < size - 1 ? make_number (i + 1) : Qnil; |
| 4777 | HASH_KEY (h, i) = Qnil; |
| 4778 | HASH_VALUE (h, i) = Qnil; |
| 4779 | HASH_HASH (h, i) = Qnil; |
| 4780 | } |
| 4781 | |
| 4782 | for (i = 0; i < XVECTOR (h->index)->size; ++i) |
| 4783 | XVECTOR (h->index)->contents[i] = Qnil; |
| 4784 | |
| 4785 | h->next_free = make_number (0); |
| 4786 | h->count = make_number (0); |
| 4787 | } |
| 4788 | } |
| 4789 | |
| 4790 | |
| 4791 | \f |
| 4792 | /************************************************************************ |
| 4793 | Weak Hash Tables |
| 4794 | ************************************************************************/ |
| 4795 | |
| 4796 | /* Sweep weak hash table H. REMOVE_ENTRIES_P non-zero means remove |
| 4797 | entries from the table that don't survive the current GC. |
| 4798 | REMOVE_ENTRIES_P zero means mark entries that are in use. Value is |
| 4799 | non-zero if anything was marked. */ |
| 4800 | |
| 4801 | static int |
| 4802 | sweep_weak_table (h, remove_entries_p) |
| 4803 | struct Lisp_Hash_Table *h; |
| 4804 | int remove_entries_p; |
| 4805 | { |
| 4806 | int bucket, n, marked; |
| 4807 | |
| 4808 | n = XVECTOR (h->index)->size & ~ARRAY_MARK_FLAG; |
| 4809 | marked = 0; |
| 4810 | |
| 4811 | for (bucket = 0; bucket < n; ++bucket) |
| 4812 | { |
| 4813 | Lisp_Object idx, next, prev; |
| 4814 | |
| 4815 | /* Follow collision chain, removing entries that |
| 4816 | don't survive this garbage collection. */ |
| 4817 | prev = Qnil; |
| 4818 | for (idx = HASH_INDEX (h, bucket); !GC_NILP (idx); idx = next) |
| 4819 | { |
| 4820 | int i = XFASTINT (idx); |
| 4821 | int key_known_to_survive_p = survives_gc_p (HASH_KEY (h, i)); |
| 4822 | int value_known_to_survive_p = survives_gc_p (HASH_VALUE (h, i)); |
| 4823 | int remove_p; |
| 4824 | |
| 4825 | if (EQ (h->weak, Qkey)) |
| 4826 | remove_p = !key_known_to_survive_p; |
| 4827 | else if (EQ (h->weak, Qvalue)) |
| 4828 | remove_p = !value_known_to_survive_p; |
| 4829 | else if (EQ (h->weak, Qkey_or_value)) |
| 4830 | remove_p = !(key_known_to_survive_p || value_known_to_survive_p); |
| 4831 | else if (EQ (h->weak, Qkey_and_value)) |
| 4832 | remove_p = !(key_known_to_survive_p && value_known_to_survive_p); |
| 4833 | else |
| 4834 | abort (); |
| 4835 | |
| 4836 | next = HASH_NEXT (h, i); |
| 4837 | |
| 4838 | if (remove_entries_p) |
| 4839 | { |
| 4840 | if (remove_p) |
| 4841 | { |
| 4842 | /* Take out of collision chain. */ |
| 4843 | if (GC_NILP (prev)) |
| 4844 | HASH_INDEX (h, bucket) = next; |
| 4845 | else |
| 4846 | HASH_NEXT (h, XFASTINT (prev)) = next; |
| 4847 | |
| 4848 | /* Add to free list. */ |
| 4849 | HASH_NEXT (h, i) = h->next_free; |
| 4850 | h->next_free = idx; |
| 4851 | |
| 4852 | /* Clear key, value, and hash. */ |
| 4853 | HASH_KEY (h, i) = HASH_VALUE (h, i) = Qnil; |
| 4854 | HASH_HASH (h, i) = Qnil; |
| 4855 | |
| 4856 | h->count = make_number (XFASTINT (h->count) - 1); |
| 4857 | } |
| 4858 | else |
| 4859 | { |
| 4860 | prev = idx; |
| 4861 | } |
| 4862 | } |
| 4863 | else |
| 4864 | { |
| 4865 | if (!remove_p) |
| 4866 | { |
| 4867 | /* Make sure key and value survive. */ |
| 4868 | if (!key_known_to_survive_p) |
| 4869 | { |
| 4870 | mark_object (HASH_KEY (h, i)); |
| 4871 | marked = 1; |
| 4872 | } |
| 4873 | |
| 4874 | if (!value_known_to_survive_p) |
| 4875 | { |
| 4876 | mark_object (HASH_VALUE (h, i)); |
| 4877 | marked = 1; |
| 4878 | } |
| 4879 | } |
| 4880 | } |
| 4881 | } |
| 4882 | } |
| 4883 | |
| 4884 | return marked; |
| 4885 | } |
| 4886 | |
| 4887 | /* Remove elements from weak hash tables that don't survive the |
| 4888 | current garbage collection. Remove weak tables that don't survive |
| 4889 | from Vweak_hash_tables. Called from gc_sweep. */ |
| 4890 | |
| 4891 | void |
| 4892 | sweep_weak_hash_tables () |
| 4893 | { |
| 4894 | Lisp_Object table, used, next; |
| 4895 | struct Lisp_Hash_Table *h; |
| 4896 | int marked; |
| 4897 | |
| 4898 | /* Mark all keys and values that are in use. Keep on marking until |
| 4899 | there is no more change. This is necessary for cases like |
| 4900 | value-weak table A containing an entry X -> Y, where Y is used in a |
| 4901 | key-weak table B, Z -> Y. If B comes after A in the list of weak |
| 4902 | tables, X -> Y might be removed from A, although when looking at B |
| 4903 | one finds that it shouldn't. */ |
| 4904 | do |
| 4905 | { |
| 4906 | marked = 0; |
| 4907 | for (table = Vweak_hash_tables; !GC_NILP (table); table = h->next_weak) |
| 4908 | { |
| 4909 | h = XHASH_TABLE (table); |
| 4910 | if (h->size & ARRAY_MARK_FLAG) |
| 4911 | marked |= sweep_weak_table (h, 0); |
| 4912 | } |
| 4913 | } |
| 4914 | while (marked); |
| 4915 | |
| 4916 | /* Remove tables and entries that aren't used. */ |
| 4917 | for (table = Vweak_hash_tables, used = Qnil; !GC_NILP (table); table = next) |
| 4918 | { |
| 4919 | h = XHASH_TABLE (table); |
| 4920 | next = h->next_weak; |
| 4921 | |
| 4922 | if (h->size & ARRAY_MARK_FLAG) |
| 4923 | { |
| 4924 | /* TABLE is marked as used. Sweep its contents. */ |
| 4925 | if (XFASTINT (h->count) > 0) |
| 4926 | sweep_weak_table (h, 1); |
| 4927 | |
| 4928 | /* Add table to the list of used weak hash tables. */ |
| 4929 | h->next_weak = used; |
| 4930 | used = table; |
| 4931 | } |
| 4932 | } |
| 4933 | |
| 4934 | Vweak_hash_tables = used; |
| 4935 | } |
| 4936 | |
| 4937 | |
| 4938 | \f |
| 4939 | /*********************************************************************** |
| 4940 | Hash Code Computation |
| 4941 | ***********************************************************************/ |
| 4942 | |
| 4943 | /* Maximum depth up to which to dive into Lisp structures. */ |
| 4944 | |
| 4945 | #define SXHASH_MAX_DEPTH 3 |
| 4946 | |
| 4947 | /* Maximum length up to which to take list and vector elements into |
| 4948 | account. */ |
| 4949 | |
| 4950 | #define SXHASH_MAX_LEN 7 |
| 4951 | |
| 4952 | /* Combine two integers X and Y for hashing. */ |
| 4953 | |
| 4954 | #define SXHASH_COMBINE(X, Y) \ |
| 4955 | ((((unsigned)(X) << 4) + (((unsigned)(X) >> 24) & 0x0fffffff)) \ |
| 4956 | + (unsigned)(Y)) |
| 4957 | |
| 4958 | |
| 4959 | /* Return a hash for string PTR which has length LEN. The hash |
| 4960 | code returned is guaranteed to fit in a Lisp integer. */ |
| 4961 | |
| 4962 | static unsigned |
| 4963 | sxhash_string (ptr, len) |
| 4964 | unsigned char *ptr; |
| 4965 | int len; |
| 4966 | { |
| 4967 | unsigned char *p = ptr; |
| 4968 | unsigned char *end = p + len; |
| 4969 | unsigned char c; |
| 4970 | unsigned hash = 0; |
| 4971 | |
| 4972 | while (p != end) |
| 4973 | { |
| 4974 | c = *p++; |
| 4975 | if (c >= 0140) |
| 4976 | c -= 40; |
| 4977 | hash = ((hash << 3) + (hash >> 28) + c); |
| 4978 | } |
| 4979 | |
| 4980 | return hash & INTMASK; |
| 4981 | } |
| 4982 | |
| 4983 | |
| 4984 | /* Return a hash for list LIST. DEPTH is the current depth in the |
| 4985 | list. We don't recurse deeper than SXHASH_MAX_DEPTH in it. */ |
| 4986 | |
| 4987 | static unsigned |
| 4988 | sxhash_list (list, depth) |
| 4989 | Lisp_Object list; |
| 4990 | int depth; |
| 4991 | { |
| 4992 | unsigned hash = 0; |
| 4993 | int i; |
| 4994 | |
| 4995 | if (depth < SXHASH_MAX_DEPTH) |
| 4996 | for (i = 0; |
| 4997 | CONSP (list) && i < SXHASH_MAX_LEN; |
| 4998 | list = XCDR (list), ++i) |
| 4999 | { |
| 5000 | unsigned hash2 = sxhash (XCAR (list), depth + 1); |
| 5001 | hash = SXHASH_COMBINE (hash, hash2); |
| 5002 | } |
| 5003 | |
| 5004 | return hash; |
| 5005 | } |
| 5006 | |
| 5007 | |
| 5008 | /* Return a hash for vector VECTOR. DEPTH is the current depth in |
| 5009 | the Lisp structure. */ |
| 5010 | |
| 5011 | static unsigned |
| 5012 | sxhash_vector (vec, depth) |
| 5013 | Lisp_Object vec; |
| 5014 | int depth; |
| 5015 | { |
| 5016 | unsigned hash = XVECTOR (vec)->size; |
| 5017 | int i, n; |
| 5018 | |
| 5019 | n = min (SXHASH_MAX_LEN, XVECTOR (vec)->size); |
| 5020 | for (i = 0; i < n; ++i) |
| 5021 | { |
| 5022 | unsigned hash2 = sxhash (XVECTOR (vec)->contents[i], depth + 1); |
| 5023 | hash = SXHASH_COMBINE (hash, hash2); |
| 5024 | } |
| 5025 | |
| 5026 | return hash; |
| 5027 | } |
| 5028 | |
| 5029 | |
| 5030 | /* Return a hash for bool-vector VECTOR. */ |
| 5031 | |
| 5032 | static unsigned |
| 5033 | sxhash_bool_vector (vec) |
| 5034 | Lisp_Object vec; |
| 5035 | { |
| 5036 | unsigned hash = XBOOL_VECTOR (vec)->size; |
| 5037 | int i, n; |
| 5038 | |
| 5039 | n = min (SXHASH_MAX_LEN, XBOOL_VECTOR (vec)->vector_size); |
| 5040 | for (i = 0; i < n; ++i) |
| 5041 | hash = SXHASH_COMBINE (hash, XBOOL_VECTOR (vec)->data[i]); |
| 5042 | |
| 5043 | return hash; |
| 5044 | } |
| 5045 | |
| 5046 | |
| 5047 | /* Return a hash code for OBJ. DEPTH is the current depth in the Lisp |
| 5048 | structure. Value is an unsigned integer clipped to INTMASK. */ |
| 5049 | |
| 5050 | unsigned |
| 5051 | sxhash (obj, depth) |
| 5052 | Lisp_Object obj; |
| 5053 | int depth; |
| 5054 | { |
| 5055 | unsigned hash; |
| 5056 | |
| 5057 | if (depth > SXHASH_MAX_DEPTH) |
| 5058 | return 0; |
| 5059 | |
| 5060 | switch (XTYPE (obj)) |
| 5061 | { |
| 5062 | case Lisp_Int: |
| 5063 | hash = XUINT (obj); |
| 5064 | break; |
| 5065 | |
| 5066 | case Lisp_Misc: |
| 5067 | hash = XUINT (obj); |
| 5068 | break; |
| 5069 | |
| 5070 | case Lisp_Symbol: |
| 5071 | obj = SYMBOL_NAME (obj); |
| 5072 | /* Fall through. */ |
| 5073 | |
| 5074 | case Lisp_String: |
| 5075 | hash = sxhash_string (SDATA (obj), SCHARS (obj)); |
| 5076 | break; |
| 5077 | |
| 5078 | /* This can be everything from a vector to an overlay. */ |
| 5079 | case Lisp_Vectorlike: |
| 5080 | if (VECTORP (obj)) |
| 5081 | /* According to the CL HyperSpec, two arrays are equal only if |
| 5082 | they are `eq', except for strings and bit-vectors. In |
| 5083 | Emacs, this works differently. We have to compare element |
| 5084 | by element. */ |
| 5085 | hash = sxhash_vector (obj, depth); |
| 5086 | else if (BOOL_VECTOR_P (obj)) |
| 5087 | hash = sxhash_bool_vector (obj); |
| 5088 | else |
| 5089 | /* Others are `equal' if they are `eq', so let's take their |
| 5090 | address as hash. */ |
| 5091 | hash = XUINT (obj); |
| 5092 | break; |
| 5093 | |
| 5094 | case Lisp_Cons: |
| 5095 | hash = sxhash_list (obj, depth); |
| 5096 | break; |
| 5097 | |
| 5098 | case Lisp_Float: |
| 5099 | { |
| 5100 | unsigned char *p = (unsigned char *) &XFLOAT_DATA (obj); |
| 5101 | unsigned char *e = p + sizeof XFLOAT_DATA (obj); |
| 5102 | for (hash = 0; p < e; ++p) |
| 5103 | hash = SXHASH_COMBINE (hash, *p); |
| 5104 | break; |
| 5105 | } |
| 5106 | |
| 5107 | default: |
| 5108 | abort (); |
| 5109 | } |
| 5110 | |
| 5111 | return hash & INTMASK; |
| 5112 | } |
| 5113 | |
| 5114 | |
| 5115 | \f |
| 5116 | /*********************************************************************** |
| 5117 | Lisp Interface |
| 5118 | ***********************************************************************/ |
| 5119 | |
| 5120 | |
| 5121 | DEFUN ("sxhash", Fsxhash, Ssxhash, 1, 1, 0, |
| 5122 | doc: /* Compute a hash code for OBJ and return it as integer. */) |
| 5123 | (obj) |
| 5124 | Lisp_Object obj; |
| 5125 | { |
| 5126 | unsigned hash = sxhash (obj, 0);; |
| 5127 | return make_number (hash); |
| 5128 | } |
| 5129 | |
| 5130 | |
| 5131 | DEFUN ("make-hash-table", Fmake_hash_table, Smake_hash_table, 0, MANY, 0, |
| 5132 | doc: /* Create and return a new hash table. |
| 5133 | |
| 5134 | Arguments are specified as keyword/argument pairs. The following |
| 5135 | arguments are defined: |
| 5136 | |
| 5137 | :test TEST -- TEST must be a symbol that specifies how to compare |
| 5138 | keys. Default is `eql'. Predefined are the tests `eq', `eql', and |
| 5139 | `equal'. User-supplied test and hash functions can be specified via |
| 5140 | `define-hash-table-test'. |
| 5141 | |
| 5142 | :size SIZE -- A hint as to how many elements will be put in the table. |
| 5143 | Default is 65. |
| 5144 | |
| 5145 | :rehash-size REHASH-SIZE - Indicates how to expand the table when it |
| 5146 | fills up. If REHASH-SIZE is an integer, add that many space. If it |
| 5147 | is a float, it must be > 1.0, and the new size is computed by |
| 5148 | multiplying the old size with that factor. Default is 1.5. |
| 5149 | |
| 5150 | :rehash-threshold THRESHOLD -- THRESHOLD must a float > 0, and <= 1.0. |
| 5151 | Resize the hash table when ratio of the number of entries in the |
| 5152 | table. Default is 0.8. |
| 5153 | |
| 5154 | :weakness WEAK -- WEAK must be one of nil, t, `key', `value', |
| 5155 | `key-or-value', or `key-and-value'. If WEAK is not nil, the table |
| 5156 | returned is a weak table. Key/value pairs are removed from a weak |
| 5157 | hash table when there are no non-weak references pointing to their |
| 5158 | key, value, one of key or value, or both key and value, depending on |
| 5159 | WEAK. WEAK t is equivalent to `key-and-value'. Default value of WEAK |
| 5160 | is nil. |
| 5161 | |
| 5162 | usage: (make-hash-table &rest KEYWORD-ARGS) */) |
| 5163 | (nargs, args) |
| 5164 | int nargs; |
| 5165 | Lisp_Object *args; |
| 5166 | { |
| 5167 | Lisp_Object test, size, rehash_size, rehash_threshold, weak; |
| 5168 | Lisp_Object user_test, user_hash; |
| 5169 | char *used; |
| 5170 | int i; |
| 5171 | |
| 5172 | /* The vector `used' is used to keep track of arguments that |
| 5173 | have been consumed. */ |
| 5174 | used = (char *) alloca (nargs * sizeof *used); |
| 5175 | bzero (used, nargs * sizeof *used); |
| 5176 | |
| 5177 | /* See if there's a `:test TEST' among the arguments. */ |
| 5178 | i = get_key_arg (QCtest, nargs, args, used); |
| 5179 | test = i < 0 ? Qeql : args[i]; |
| 5180 | if (!EQ (test, Qeq) && !EQ (test, Qeql) && !EQ (test, Qequal)) |
| 5181 | { |
| 5182 | /* See if it is a user-defined test. */ |
| 5183 | Lisp_Object prop; |
| 5184 | |
| 5185 | prop = Fget (test, Qhash_table_test); |
| 5186 | if (!CONSP (prop) || !CONSP (XCDR (prop))) |
| 5187 | Fsignal (Qerror, list2 (build_string ("Invalid hash table test"), |
| 5188 | test)); |
| 5189 | user_test = XCAR (prop); |
| 5190 | user_hash = XCAR (XCDR (prop)); |
| 5191 | } |
| 5192 | else |
| 5193 | user_test = user_hash = Qnil; |
| 5194 | |
| 5195 | /* See if there's a `:size SIZE' argument. */ |
| 5196 | i = get_key_arg (QCsize, nargs, args, used); |
| 5197 | size = i < 0 ? Qnil : args[i]; |
| 5198 | if (NILP (size)) |
| 5199 | size = make_number (DEFAULT_HASH_SIZE); |
| 5200 | else if (!INTEGERP (size) || XINT (size) < 0) |
| 5201 | Fsignal (Qerror, |
| 5202 | list2 (build_string ("Invalid hash table size"), |
| 5203 | size)); |
| 5204 | |
| 5205 | /* Look for `:rehash-size SIZE'. */ |
| 5206 | i = get_key_arg (QCrehash_size, nargs, args, used); |
| 5207 | rehash_size = i < 0 ? make_float (DEFAULT_REHASH_SIZE) : args[i]; |
| 5208 | if (!NUMBERP (rehash_size) |
| 5209 | || (INTEGERP (rehash_size) && XINT (rehash_size) <= 0) |
| 5210 | || XFLOATINT (rehash_size) <= 1.0) |
| 5211 | Fsignal (Qerror, |
| 5212 | list2 (build_string ("Invalid hash table rehash size"), |
| 5213 | rehash_size)); |
| 5214 | |
| 5215 | /* Look for `:rehash-threshold THRESHOLD'. */ |
| 5216 | i = get_key_arg (QCrehash_threshold, nargs, args, used); |
| 5217 | rehash_threshold = i < 0 ? make_float (DEFAULT_REHASH_THRESHOLD) : args[i]; |
| 5218 | if (!FLOATP (rehash_threshold) |
| 5219 | || XFLOATINT (rehash_threshold) <= 0.0 |
| 5220 | || XFLOATINT (rehash_threshold) > 1.0) |
| 5221 | Fsignal (Qerror, |
| 5222 | list2 (build_string ("Invalid hash table rehash threshold"), |
| 5223 | rehash_threshold)); |
| 5224 | |
| 5225 | /* Look for `:weakness WEAK'. */ |
| 5226 | i = get_key_arg (QCweakness, nargs, args, used); |
| 5227 | weak = i < 0 ? Qnil : args[i]; |
| 5228 | if (EQ (weak, Qt)) |
| 5229 | weak = Qkey_and_value; |
| 5230 | if (!NILP (weak) |
| 5231 | && !EQ (weak, Qkey) |
| 5232 | && !EQ (weak, Qvalue) |
| 5233 | && !EQ (weak, Qkey_or_value) |
| 5234 | && !EQ (weak, Qkey_and_value)) |
| 5235 | Fsignal (Qerror, list2 (build_string ("Invalid hash table weakness"), |
| 5236 | weak)); |
| 5237 | |
| 5238 | /* Now, all args should have been used up, or there's a problem. */ |
| 5239 | for (i = 0; i < nargs; ++i) |
| 5240 | if (!used[i]) |
| 5241 | Fsignal (Qerror, |
| 5242 | list2 (build_string ("Invalid argument list"), args[i])); |
| 5243 | |
| 5244 | return make_hash_table (test, size, rehash_size, rehash_threshold, weak, |
| 5245 | user_test, user_hash); |
| 5246 | } |
| 5247 | |
| 5248 | |
| 5249 | DEFUN ("copy-hash-table", Fcopy_hash_table, Scopy_hash_table, 1, 1, 0, |
| 5250 | doc: /* Return a copy of hash table TABLE. */) |
| 5251 | (table) |
| 5252 | Lisp_Object table; |
| 5253 | { |
| 5254 | return copy_hash_table (check_hash_table (table)); |
| 5255 | } |
| 5256 | |
| 5257 | |
| 5258 | DEFUN ("hash-table-count", Fhash_table_count, Shash_table_count, 1, 1, 0, |
| 5259 | doc: /* Return the number of elements in TABLE. */) |
| 5260 | (table) |
| 5261 | Lisp_Object table; |
| 5262 | { |
| 5263 | return check_hash_table (table)->count; |
| 5264 | } |
| 5265 | |
| 5266 | |
| 5267 | DEFUN ("hash-table-rehash-size", Fhash_table_rehash_size, |
| 5268 | Shash_table_rehash_size, 1, 1, 0, |
| 5269 | doc: /* Return the current rehash size of TABLE. */) |
| 5270 | (table) |
| 5271 | Lisp_Object table; |
| 5272 | { |
| 5273 | return check_hash_table (table)->rehash_size; |
| 5274 | } |
| 5275 | |
| 5276 | |
| 5277 | DEFUN ("hash-table-rehash-threshold", Fhash_table_rehash_threshold, |
| 5278 | Shash_table_rehash_threshold, 1, 1, 0, |
| 5279 | doc: /* Return the current rehash threshold of TABLE. */) |
| 5280 | (table) |
| 5281 | Lisp_Object table; |
| 5282 | { |
| 5283 | return check_hash_table (table)->rehash_threshold; |
| 5284 | } |
| 5285 | |
| 5286 | |
| 5287 | DEFUN ("hash-table-size", Fhash_table_size, Shash_table_size, 1, 1, 0, |
| 5288 | doc: /* Return the size of TABLE. |
| 5289 | The size can be used as an argument to `make-hash-table' to create |
| 5290 | a hash table than can hold as many elements of TABLE holds |
| 5291 | without need for resizing. */) |
| 5292 | (table) |
| 5293 | Lisp_Object table; |
| 5294 | { |
| 5295 | struct Lisp_Hash_Table *h = check_hash_table (table); |
| 5296 | return make_number (HASH_TABLE_SIZE (h)); |
| 5297 | } |
| 5298 | |
| 5299 | |
| 5300 | DEFUN ("hash-table-test", Fhash_table_test, Shash_table_test, 1, 1, 0, |
| 5301 | doc: /* Return the test TABLE uses. */) |
| 5302 | (table) |
| 5303 | Lisp_Object table; |
| 5304 | { |
| 5305 | return check_hash_table (table)->test; |
| 5306 | } |
| 5307 | |
| 5308 | |
| 5309 | DEFUN ("hash-table-weakness", Fhash_table_weakness, Shash_table_weakness, |
| 5310 | 1, 1, 0, |
| 5311 | doc: /* Return the weakness of TABLE. */) |
| 5312 | (table) |
| 5313 | Lisp_Object table; |
| 5314 | { |
| 5315 | return check_hash_table (table)->weak; |
| 5316 | } |
| 5317 | |
| 5318 | |
| 5319 | DEFUN ("hash-table-p", Fhash_table_p, Shash_table_p, 1, 1, 0, |
| 5320 | doc: /* Return t if OBJ is a Lisp hash table object. */) |
| 5321 | (obj) |
| 5322 | Lisp_Object obj; |
| 5323 | { |
| 5324 | return HASH_TABLE_P (obj) ? Qt : Qnil; |
| 5325 | } |
| 5326 | |
| 5327 | |
| 5328 | DEFUN ("clrhash", Fclrhash, Sclrhash, 1, 1, 0, |
| 5329 | doc: /* Clear hash table TABLE. */) |
| 5330 | (table) |
| 5331 | Lisp_Object table; |
| 5332 | { |
| 5333 | hash_clear (check_hash_table (table)); |
| 5334 | return Qnil; |
| 5335 | } |
| 5336 | |
| 5337 | |
| 5338 | DEFUN ("gethash", Fgethash, Sgethash, 2, 3, 0, |
| 5339 | doc: /* Look up KEY in TABLE and return its associated value. |
| 5340 | If KEY is not found, return DFLT which defaults to nil. */) |
| 5341 | (key, table, dflt) |
| 5342 | Lisp_Object key, table, dflt; |
| 5343 | { |
| 5344 | struct Lisp_Hash_Table *h = check_hash_table (table); |
| 5345 | int i = hash_lookup (h, key, NULL); |
| 5346 | return i >= 0 ? HASH_VALUE (h, i) : dflt; |
| 5347 | } |
| 5348 | |
| 5349 | |
| 5350 | DEFUN ("puthash", Fputhash, Sputhash, 3, 3, 0, |
| 5351 | doc: /* Associate KEY with VALUE in hash table TABLE. |
| 5352 | If KEY is already present in table, replace its current value with |
| 5353 | VALUE. */) |
| 5354 | (key, value, table) |
| 5355 | Lisp_Object key, value, table; |
| 5356 | { |
| 5357 | struct Lisp_Hash_Table *h = check_hash_table (table); |
| 5358 | int i; |
| 5359 | unsigned hash; |
| 5360 | |
| 5361 | i = hash_lookup (h, key, &hash); |
| 5362 | if (i >= 0) |
| 5363 | HASH_VALUE (h, i) = value; |
| 5364 | else |
| 5365 | hash_put (h, key, value, hash); |
| 5366 | |
| 5367 | return value; |
| 5368 | } |
| 5369 | |
| 5370 | |
| 5371 | DEFUN ("remhash", Fremhash, Sremhash, 2, 2, 0, |
| 5372 | doc: /* Remove KEY from TABLE. */) |
| 5373 | (key, table) |
| 5374 | Lisp_Object key, table; |
| 5375 | { |
| 5376 | struct Lisp_Hash_Table *h = check_hash_table (table); |
| 5377 | hash_remove (h, key); |
| 5378 | return Qnil; |
| 5379 | } |
| 5380 | |
| 5381 | |
| 5382 | DEFUN ("maphash", Fmaphash, Smaphash, 2, 2, 0, |
| 5383 | doc: /* Call FUNCTION for all entries in hash table TABLE. |
| 5384 | FUNCTION is called with 2 arguments KEY and VALUE. */) |
| 5385 | (function, table) |
| 5386 | Lisp_Object function, table; |
| 5387 | { |
| 5388 | struct Lisp_Hash_Table *h = check_hash_table (table); |
| 5389 | Lisp_Object args[3]; |
| 5390 | int i; |
| 5391 | |
| 5392 | for (i = 0; i < HASH_TABLE_SIZE (h); ++i) |
| 5393 | if (!NILP (HASH_HASH (h, i))) |
| 5394 | { |
| 5395 | args[0] = function; |
| 5396 | args[1] = HASH_KEY (h, i); |
| 5397 | args[2] = HASH_VALUE (h, i); |
| 5398 | Ffuncall (3, args); |
| 5399 | } |
| 5400 | |
| 5401 | return Qnil; |
| 5402 | } |
| 5403 | |
| 5404 | |
| 5405 | DEFUN ("define-hash-table-test", Fdefine_hash_table_test, |
| 5406 | Sdefine_hash_table_test, 3, 3, 0, |
| 5407 | doc: /* Define a new hash table test with name NAME, a symbol. |
| 5408 | |
| 5409 | In hash tables created with NAME specified as test, use TEST to |
| 5410 | compare keys, and HASH for computing hash codes of keys. |
| 5411 | |
| 5412 | TEST must be a function taking two arguments and returning non-nil if |
| 5413 | both arguments are the same. HASH must be a function taking one |
| 5414 | argument and return an integer that is the hash code of the argument. |
| 5415 | Hash code computation should use the whole value range of integers, |
| 5416 | including negative integers. */) |
| 5417 | (name, test, hash) |
| 5418 | Lisp_Object name, test, hash; |
| 5419 | { |
| 5420 | return Fput (name, Qhash_table_test, list2 (test, hash)); |
| 5421 | } |
| 5422 | |
| 5423 | |
| 5424 | \f |
| 5425 | /************************************************************************ |
| 5426 | MD5 |
| 5427 | ************************************************************************/ |
| 5428 | |
| 5429 | #include "md5.h" |
| 5430 | #include "coding.h" |
| 5431 | |
| 5432 | DEFUN ("md5", Fmd5, Smd5, 1, 5, 0, |
| 5433 | doc: /* Return MD5 message digest of OBJECT, a buffer or string. |
| 5434 | |
| 5435 | A message digest is a cryptographic checksum of a document, and the |
| 5436 | algorithm to calculate it is defined in RFC 1321. |
| 5437 | |
| 5438 | The two optional arguments START and END are character positions |
| 5439 | specifying for which part of OBJECT the message digest should be |
| 5440 | computed. If nil or omitted, the digest is computed for the whole |
| 5441 | OBJECT. |
| 5442 | |
| 5443 | The MD5 message digest is computed from the result of encoding the |
| 5444 | text in a coding system, not directly from the internal Emacs form of |
| 5445 | the text. The optional fourth argument CODING-SYSTEM specifies which |
| 5446 | coding system to encode the text with. It should be the same coding |
| 5447 | system that you used or will use when actually writing the text into a |
| 5448 | file. |
| 5449 | |
| 5450 | If CODING-SYSTEM is nil or omitted, the default depends on OBJECT. If |
| 5451 | OBJECT is a buffer, the default for CODING-SYSTEM is whatever coding |
| 5452 | system would be chosen by default for writing this text into a file. |
| 5453 | |
| 5454 | If OBJECT is a string, the most preferred coding system (see the |
| 5455 | command `prefer-coding-system') is used. |
| 5456 | |
| 5457 | If NOERROR is non-nil, silently assume the `raw-text' coding if the |
| 5458 | guesswork fails. Normally, an error is signaled in such case. */) |
| 5459 | (object, start, end, coding_system, noerror) |
| 5460 | Lisp_Object object, start, end, coding_system, noerror; |
| 5461 | { |
| 5462 | unsigned char digest[16]; |
| 5463 | unsigned char value[33]; |
| 5464 | int i; |
| 5465 | int size; |
| 5466 | int size_byte = 0; |
| 5467 | int start_char = 0, end_char = 0; |
| 5468 | int start_byte = 0, end_byte = 0; |
| 5469 | register int b, e; |
| 5470 | register struct buffer *bp; |
| 5471 | int temp; |
| 5472 | |
| 5473 | if (STRINGP (object)) |
| 5474 | { |
| 5475 | if (NILP (coding_system)) |
| 5476 | { |
| 5477 | /* Decide the coding-system to encode the data with. */ |
| 5478 | |
| 5479 | if (STRING_MULTIBYTE (object)) |
| 5480 | /* use default, we can't guess correct value */ |
| 5481 | coding_system = SYMBOL_VALUE (XCAR (Vcoding_category_list)); |
| 5482 | else |
| 5483 | coding_system = Qraw_text; |
| 5484 | } |
| 5485 | |
| 5486 | if (NILP (Fcoding_system_p (coding_system))) |
| 5487 | { |
| 5488 | /* Invalid coding system. */ |
| 5489 | |
| 5490 | if (!NILP (noerror)) |
| 5491 | coding_system = Qraw_text; |
| 5492 | else |
| 5493 | while (1) |
| 5494 | Fsignal (Qcoding_system_error, Fcons (coding_system, Qnil)); |
| 5495 | } |
| 5496 | |
| 5497 | if (STRING_MULTIBYTE (object)) |
| 5498 | object = code_convert_string1 (object, coding_system, Qnil, 1); |
| 5499 | |
| 5500 | size = SCHARS (object); |
| 5501 | size_byte = SBYTES (object); |
| 5502 | |
| 5503 | if (!NILP (start)) |
| 5504 | { |
| 5505 | CHECK_NUMBER (start); |
| 5506 | |
| 5507 | start_char = XINT (start); |
| 5508 | |
| 5509 | if (start_char < 0) |
| 5510 | start_char += size; |
| 5511 | |
| 5512 | start_byte = string_char_to_byte (object, start_char); |
| 5513 | } |
| 5514 | |
| 5515 | if (NILP (end)) |
| 5516 | { |
| 5517 | end_char = size; |
| 5518 | end_byte = size_byte; |
| 5519 | } |
| 5520 | else |
| 5521 | { |
| 5522 | CHECK_NUMBER (end); |
| 5523 | |
| 5524 | end_char = XINT (end); |
| 5525 | |
| 5526 | if (end_char < 0) |
| 5527 | end_char += size; |
| 5528 | |
| 5529 | end_byte = string_char_to_byte (object, end_char); |
| 5530 | } |
| 5531 | |
| 5532 | if (!(0 <= start_char && start_char <= end_char && end_char <= size)) |
| 5533 | args_out_of_range_3 (object, make_number (start_char), |
| 5534 | make_number (end_char)); |
| 5535 | } |
| 5536 | else |
| 5537 | { |
| 5538 | struct buffer *prev = current_buffer; |
| 5539 | |
| 5540 | record_unwind_protect (Fset_buffer, Fcurrent_buffer ()); |
| 5541 | |
| 5542 | CHECK_BUFFER (object); |
| 5543 | |
| 5544 | bp = XBUFFER (object); |
| 5545 | if (bp != current_buffer) |
| 5546 | set_buffer_internal (bp); |
| 5547 | |
| 5548 | if (NILP (start)) |
| 5549 | b = BEGV; |
| 5550 | else |
| 5551 | { |
| 5552 | CHECK_NUMBER_COERCE_MARKER (start); |
| 5553 | b = XINT (start); |
| 5554 | } |
| 5555 | |
| 5556 | if (NILP (end)) |
| 5557 | e = ZV; |
| 5558 | else |
| 5559 | { |
| 5560 | CHECK_NUMBER_COERCE_MARKER (end); |
| 5561 | e = XINT (end); |
| 5562 | } |
| 5563 | |
| 5564 | if (b > e) |
| 5565 | temp = b, b = e, e = temp; |
| 5566 | |
| 5567 | if (!(BEGV <= b && e <= ZV)) |
| 5568 | args_out_of_range (start, end); |
| 5569 | |
| 5570 | if (NILP (coding_system)) |
| 5571 | { |
| 5572 | /* Decide the coding-system to encode the data with. |
| 5573 | See fileio.c:Fwrite-region */ |
| 5574 | |
| 5575 | if (!NILP (Vcoding_system_for_write)) |
| 5576 | coding_system = Vcoding_system_for_write; |
| 5577 | else |
| 5578 | { |
| 5579 | int force_raw_text = 0; |
| 5580 | |
| 5581 | coding_system = XBUFFER (object)->buffer_file_coding_system; |
| 5582 | if (NILP (coding_system) |
| 5583 | || NILP (Flocal_variable_p (Qbuffer_file_coding_system, Qnil))) |
| 5584 | { |
| 5585 | coding_system = Qnil; |
| 5586 | if (NILP (current_buffer->enable_multibyte_characters)) |
| 5587 | force_raw_text = 1; |
| 5588 | } |
| 5589 | |
| 5590 | if (NILP (coding_system) && !NILP (Fbuffer_file_name(object))) |
| 5591 | { |
| 5592 | /* Check file-coding-system-alist. */ |
| 5593 | Lisp_Object args[4], val; |
| 5594 | |
| 5595 | args[0] = Qwrite_region; args[1] = start; args[2] = end; |
| 5596 | args[3] = Fbuffer_file_name(object); |
| 5597 | val = Ffind_operation_coding_system (4, args); |
| 5598 | if (CONSP (val) && !NILP (XCDR (val))) |
| 5599 | coding_system = XCDR (val); |
| 5600 | } |
| 5601 | |
| 5602 | if (NILP (coding_system) |
| 5603 | && !NILP (XBUFFER (object)->buffer_file_coding_system)) |
| 5604 | { |
| 5605 | /* If we still have not decided a coding system, use the |
| 5606 | default value of buffer-file-coding-system. */ |
| 5607 | coding_system = XBUFFER (object)->buffer_file_coding_system; |
| 5608 | } |
| 5609 | |
| 5610 | if (!force_raw_text |
| 5611 | && !NILP (Ffboundp (Vselect_safe_coding_system_function))) |
| 5612 | /* Confirm that VAL can surely encode the current region. */ |
| 5613 | coding_system = call4 (Vselect_safe_coding_system_function, |
| 5614 | make_number (b), make_number (e), |
| 5615 | coding_system, Qnil); |
| 5616 | |
| 5617 | if (force_raw_text) |
| 5618 | coding_system = Qraw_text; |
| 5619 | } |
| 5620 | |
| 5621 | if (NILP (Fcoding_system_p (coding_system))) |
| 5622 | { |
| 5623 | /* Invalid coding system. */ |
| 5624 | |
| 5625 | if (!NILP (noerror)) |
| 5626 | coding_system = Qraw_text; |
| 5627 | else |
| 5628 | while (1) |
| 5629 | Fsignal (Qcoding_system_error, Fcons (coding_system, Qnil)); |
| 5630 | } |
| 5631 | } |
| 5632 | |
| 5633 | object = make_buffer_string (b, e, 0); |
| 5634 | if (prev != current_buffer) |
| 5635 | set_buffer_internal (prev); |
| 5636 | /* Discard the unwind protect for recovering the current |
| 5637 | buffer. */ |
| 5638 | specpdl_ptr--; |
| 5639 | |
| 5640 | if (STRING_MULTIBYTE (object)) |
| 5641 | object = code_convert_string1 (object, coding_system, Qnil, 1); |
| 5642 | } |
| 5643 | |
| 5644 | md5_buffer (SDATA (object) + start_byte, |
| 5645 | SBYTES (object) - (size_byte - end_byte), |
| 5646 | digest); |
| 5647 | |
| 5648 | for (i = 0; i < 16; i++) |
| 5649 | sprintf (&value[2 * i], "%02x", digest[i]); |
| 5650 | value[32] = '\0'; |
| 5651 | |
| 5652 | return make_string (value, 32); |
| 5653 | } |
| 5654 | |
| 5655 | \f |
| 5656 | void |
| 5657 | syms_of_fns () |
| 5658 | { |
| 5659 | /* Hash table stuff. */ |
| 5660 | Qhash_table_p = intern ("hash-table-p"); |
| 5661 | staticpro (&Qhash_table_p); |
| 5662 | Qeq = intern ("eq"); |
| 5663 | staticpro (&Qeq); |
| 5664 | Qeql = intern ("eql"); |
| 5665 | staticpro (&Qeql); |
| 5666 | Qequal = intern ("equal"); |
| 5667 | staticpro (&Qequal); |
| 5668 | QCtest = intern (":test"); |
| 5669 | staticpro (&QCtest); |
| 5670 | QCsize = intern (":size"); |
| 5671 | staticpro (&QCsize); |
| 5672 | QCrehash_size = intern (":rehash-size"); |
| 5673 | staticpro (&QCrehash_size); |
| 5674 | QCrehash_threshold = intern (":rehash-threshold"); |
| 5675 | staticpro (&QCrehash_threshold); |
| 5676 | QCweakness = intern (":weakness"); |
| 5677 | staticpro (&QCweakness); |
| 5678 | Qkey = intern ("key"); |
| 5679 | staticpro (&Qkey); |
| 5680 | Qvalue = intern ("value"); |
| 5681 | staticpro (&Qvalue); |
| 5682 | Qhash_table_test = intern ("hash-table-test"); |
| 5683 | staticpro (&Qhash_table_test); |
| 5684 | Qkey_or_value = intern ("key-or-value"); |
| 5685 | staticpro (&Qkey_or_value); |
| 5686 | Qkey_and_value = intern ("key-and-value"); |
| 5687 | staticpro (&Qkey_and_value); |
| 5688 | |
| 5689 | defsubr (&Ssxhash); |
| 5690 | defsubr (&Smake_hash_table); |
| 5691 | defsubr (&Scopy_hash_table); |
| 5692 | defsubr (&Shash_table_count); |
| 5693 | defsubr (&Shash_table_rehash_size); |
| 5694 | defsubr (&Shash_table_rehash_threshold); |
| 5695 | defsubr (&Shash_table_size); |
| 5696 | defsubr (&Shash_table_test); |
| 5697 | defsubr (&Shash_table_weakness); |
| 5698 | defsubr (&Shash_table_p); |
| 5699 | defsubr (&Sclrhash); |
| 5700 | defsubr (&Sgethash); |
| 5701 | defsubr (&Sputhash); |
| 5702 | defsubr (&Sremhash); |
| 5703 | defsubr (&Smaphash); |
| 5704 | defsubr (&Sdefine_hash_table_test); |
| 5705 | |
| 5706 | Qstring_lessp = intern ("string-lessp"); |
| 5707 | staticpro (&Qstring_lessp); |
| 5708 | Qprovide = intern ("provide"); |
| 5709 | staticpro (&Qprovide); |
| 5710 | Qrequire = intern ("require"); |
| 5711 | staticpro (&Qrequire); |
| 5712 | Qyes_or_no_p_history = intern ("yes-or-no-p-history"); |
| 5713 | staticpro (&Qyes_or_no_p_history); |
| 5714 | Qcursor_in_echo_area = intern ("cursor-in-echo-area"); |
| 5715 | staticpro (&Qcursor_in_echo_area); |
| 5716 | Qwidget_type = intern ("widget-type"); |
| 5717 | staticpro (&Qwidget_type); |
| 5718 | |
| 5719 | staticpro (&string_char_byte_cache_string); |
| 5720 | string_char_byte_cache_string = Qnil; |
| 5721 | |
| 5722 | require_nesting_list = Qnil; |
| 5723 | staticpro (&require_nesting_list); |
| 5724 | |
| 5725 | Fset (Qyes_or_no_p_history, Qnil); |
| 5726 | |
| 5727 | DEFVAR_LISP ("features", &Vfeatures, |
| 5728 | doc: /* A list of symbols which are the features of the executing emacs. |
| 5729 | Used by `featurep' and `require', and altered by `provide'. */); |
| 5730 | Vfeatures = Qnil; |
| 5731 | Qsubfeatures = intern ("subfeatures"); |
| 5732 | staticpro (&Qsubfeatures); |
| 5733 | |
| 5734 | #ifdef HAVE_LANGINFO_CODESET |
| 5735 | Qcodeset = intern ("codeset"); |
| 5736 | staticpro (&Qcodeset); |
| 5737 | Qdays = intern ("days"); |
| 5738 | staticpro (&Qdays); |
| 5739 | Qmonths = intern ("months"); |
| 5740 | staticpro (&Qmonths); |
| 5741 | Qpaper = intern ("paper"); |
| 5742 | staticpro (&Qpaper); |
| 5743 | #endif /* HAVE_LANGINFO_CODESET */ |
| 5744 | |
| 5745 | DEFVAR_BOOL ("use-dialog-box", &use_dialog_box, |
| 5746 | doc: /* *Non-nil means mouse commands use dialog boxes to ask questions. |
| 5747 | This applies to `y-or-n-p' and `yes-or-no-p' questions asked by commands |
| 5748 | invoked by mouse clicks and mouse menu items. */); |
| 5749 | use_dialog_box = 1; |
| 5750 | |
| 5751 | DEFVAR_BOOL ("use-file-dialog", &use_file_dialog, |
| 5752 | doc: /* *Non-nil means mouse commands use a file dialog to ask for files. |
| 5753 | This applies to commands from menus and tool bar buttons. The value of |
| 5754 | `use-dialog-box' takes precedence over this variable, so a file dialog is only |
| 5755 | used if both `use-dialog-box' and this variable are non-nil. */); |
| 5756 | use_file_dialog = 1; |
| 5757 | |
| 5758 | defsubr (&Sidentity); |
| 5759 | defsubr (&Srandom); |
| 5760 | defsubr (&Slength); |
| 5761 | defsubr (&Ssafe_length); |
| 5762 | defsubr (&Sstring_bytes); |
| 5763 | defsubr (&Sstring_equal); |
| 5764 | defsubr (&Scompare_strings); |
| 5765 | defsubr (&Sstring_lessp); |
| 5766 | defsubr (&Sappend); |
| 5767 | defsubr (&Sconcat); |
| 5768 | defsubr (&Svconcat); |
| 5769 | defsubr (&Scopy_sequence); |
| 5770 | defsubr (&Sstring_make_multibyte); |
| 5771 | defsubr (&Sstring_make_unibyte); |
| 5772 | defsubr (&Sstring_as_multibyte); |
| 5773 | defsubr (&Sstring_as_unibyte); |
| 5774 | defsubr (&Sstring_to_multibyte); |
| 5775 | defsubr (&Scopy_alist); |
| 5776 | defsubr (&Ssubstring); |
| 5777 | defsubr (&Ssubstring_no_properties); |
| 5778 | defsubr (&Snthcdr); |
| 5779 | defsubr (&Snth); |
| 5780 | defsubr (&Selt); |
| 5781 | defsubr (&Smember); |
| 5782 | defsubr (&Smemq); |
| 5783 | defsubr (&Sassq); |
| 5784 | defsubr (&Sassoc); |
| 5785 | defsubr (&Srassq); |
| 5786 | defsubr (&Srassoc); |
| 5787 | defsubr (&Sdelq); |
| 5788 | defsubr (&Sdelete); |
| 5789 | defsubr (&Snreverse); |
| 5790 | defsubr (&Sreverse); |
| 5791 | defsubr (&Ssort); |
| 5792 | defsubr (&Splist_get); |
| 5793 | defsubr (&Ssafe_plist_get); |
| 5794 | defsubr (&Sget); |
| 5795 | defsubr (&Splist_put); |
| 5796 | defsubr (&Sput); |
| 5797 | defsubr (&Slax_plist_get); |
| 5798 | defsubr (&Slax_plist_put); |
| 5799 | defsubr (&Seql); |
| 5800 | defsubr (&Sequal); |
| 5801 | defsubr (&Sequal_including_properties); |
| 5802 | defsubr (&Sfillarray); |
| 5803 | defsubr (&Sclear_string); |
| 5804 | defsubr (&Schar_table_subtype); |
| 5805 | defsubr (&Schar_table_parent); |
| 5806 | defsubr (&Sset_char_table_parent); |
| 5807 | defsubr (&Schar_table_extra_slot); |
| 5808 | defsubr (&Sset_char_table_extra_slot); |
| 5809 | defsubr (&Schar_table_range); |
| 5810 | defsubr (&Sset_char_table_range); |
| 5811 | defsubr (&Sset_char_table_default); |
| 5812 | defsubr (&Soptimize_char_table); |
| 5813 | defsubr (&Smap_char_table); |
| 5814 | defsubr (&Snconc); |
| 5815 | defsubr (&Smapcar); |
| 5816 | defsubr (&Smapc); |
| 5817 | defsubr (&Smapconcat); |
| 5818 | defsubr (&Sy_or_n_p); |
| 5819 | defsubr (&Syes_or_no_p); |
| 5820 | defsubr (&Sload_average); |
| 5821 | defsubr (&Sfeaturep); |
| 5822 | defsubr (&Srequire); |
| 5823 | defsubr (&Sprovide); |
| 5824 | defsubr (&Splist_member); |
| 5825 | defsubr (&Swidget_put); |
| 5826 | defsubr (&Swidget_get); |
| 5827 | defsubr (&Swidget_apply); |
| 5828 | defsubr (&Sbase64_encode_region); |
| 5829 | defsubr (&Sbase64_decode_region); |
| 5830 | defsubr (&Sbase64_encode_string); |
| 5831 | defsubr (&Sbase64_decode_string); |
| 5832 | defsubr (&Smd5); |
| 5833 | defsubr (&Slocale_info); |
| 5834 | } |
| 5835 | |
| 5836 | |
| 5837 | void |
| 5838 | init_fns () |
| 5839 | { |
| 5840 | Vweak_hash_tables = Qnil; |
| 5841 | } |
| 5842 | |
| 5843 | /* arch-tag: 787f8219-5b74-46bd-8469-7e1cc475fa31 |
| 5844 | (do not change this comment) */ |