| 1 | /* Lisp functions pertaining to editing. |
| 2 | Copyright (C) 1985,86,87,89,93,94 Free Software Foundation, Inc. |
| 3 | |
| 4 | This file is part of GNU Emacs. |
| 5 | |
| 6 | GNU Emacs is free software; you can redistribute it and/or modify |
| 7 | it under the terms of the GNU General Public License as published by |
| 8 | the Free Software Foundation; either version 1, or (at your option) |
| 9 | any later version. |
| 10 | |
| 11 | GNU Emacs is distributed in the hope that it will be useful, |
| 12 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 14 | GNU General Public License for more details. |
| 15 | |
| 16 | You should have received a copy of the GNU General Public License |
| 17 | along with GNU Emacs; see the file COPYING. If not, write to |
| 18 | the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */ |
| 19 | |
| 20 | |
| 21 | #include <sys/types.h> |
| 22 | |
| 23 | #include <config.h> |
| 24 | |
| 25 | #ifdef VMS |
| 26 | #include "vms-pwd.h" |
| 27 | #else |
| 28 | #include <pwd.h> |
| 29 | #endif |
| 30 | |
| 31 | #include "lisp.h" |
| 32 | #include "intervals.h" |
| 33 | #include "buffer.h" |
| 34 | #include "window.h" |
| 35 | |
| 36 | #include "systime.h" |
| 37 | |
| 38 | #define min(a, b) ((a) < (b) ? (a) : (b)) |
| 39 | #define max(a, b) ((a) > (b) ? (a) : (b)) |
| 40 | |
| 41 | /* Some static data, and a function to initialize it for each run */ |
| 42 | |
| 43 | Lisp_Object Vsystem_name; |
| 44 | Lisp_Object Vuser_real_name; /* login name of current user ID */ |
| 45 | Lisp_Object Vuser_full_name; /* full name of current user */ |
| 46 | Lisp_Object Vuser_name; /* user name from LOGNAME or USER */ |
| 47 | |
| 48 | void |
| 49 | init_editfns () |
| 50 | { |
| 51 | char *user_name; |
| 52 | register unsigned char *p, *q, *r; |
| 53 | struct passwd *pw; /* password entry for the current user */ |
| 54 | extern char *index (); |
| 55 | Lisp_Object tem; |
| 56 | |
| 57 | /* Set up system_name even when dumping. */ |
| 58 | init_system_name (); |
| 59 | |
| 60 | #ifndef CANNOT_DUMP |
| 61 | /* Don't bother with this on initial start when just dumping out */ |
| 62 | if (!initialized) |
| 63 | return; |
| 64 | #endif /* not CANNOT_DUMP */ |
| 65 | |
| 66 | pw = (struct passwd *) getpwuid (getuid ()); |
| 67 | Vuser_real_name = build_string (pw ? pw->pw_name : "unknown"); |
| 68 | |
| 69 | /* Get the effective user name, by consulting environment variables, |
| 70 | or the effective uid if those are unset. */ |
| 71 | user_name = (char *) getenv ("LOGNAME"); |
| 72 | if (!user_name) |
| 73 | user_name = (char *) getenv ("USER"); |
| 74 | if (!user_name) |
| 75 | { |
| 76 | pw = (struct passwd *) getpwuid (geteuid ()); |
| 77 | user_name = (char *) (pw ? pw->pw_name : "unknown"); |
| 78 | } |
| 79 | Vuser_name = build_string (user_name); |
| 80 | |
| 81 | /* If the user name claimed in the environment vars differs from |
| 82 | the real uid, use the claimed name to find the full name. */ |
| 83 | tem = Fstring_equal (Vuser_name, Vuser_real_name); |
| 84 | if (NILP (tem)) |
| 85 | pw = (struct passwd *) getpwnam (XSTRING (Vuser_name)->data); |
| 86 | |
| 87 | p = (unsigned char *) (pw ? USER_FULL_NAME : "unknown"); |
| 88 | q = (unsigned char *) index (p, ','); |
| 89 | Vuser_full_name = make_string (p, q ? q - p : strlen (p)); |
| 90 | |
| 91 | #ifdef AMPERSAND_FULL_NAME |
| 92 | p = XSTRING (Vuser_full_name)->data; |
| 93 | q = (char *) index (p, '&'); |
| 94 | /* Substitute the login name for the &, upcasing the first character. */ |
| 95 | if (q) |
| 96 | { |
| 97 | r = (char *) alloca (strlen (p) + XSTRING (Vuser_name)->size + 1); |
| 98 | bcopy (p, r, q - p); |
| 99 | r[q - p] = 0; |
| 100 | strcat (r, XSTRING (Vuser_name)->data); |
| 101 | r[q - p] = UPCASE (r[q - p]); |
| 102 | strcat (r, q + 1); |
| 103 | Vuser_full_name = build_string (r); |
| 104 | } |
| 105 | #endif /* AMPERSAND_FULL_NAME */ |
| 106 | } |
| 107 | \f |
| 108 | DEFUN ("char-to-string", Fchar_to_string, Schar_to_string, 1, 1, 0, |
| 109 | "Convert arg CHAR to a one-character string containing that character.") |
| 110 | (n) |
| 111 | Lisp_Object n; |
| 112 | { |
| 113 | char c; |
| 114 | CHECK_NUMBER (n, 0); |
| 115 | |
| 116 | c = XINT (n); |
| 117 | return make_string (&c, 1); |
| 118 | } |
| 119 | |
| 120 | DEFUN ("string-to-char", Fstring_to_char, Sstring_to_char, 1, 1, 0, |
| 121 | "Convert arg STRING to a character, the first character of that string.") |
| 122 | (str) |
| 123 | register Lisp_Object str; |
| 124 | { |
| 125 | register Lisp_Object val; |
| 126 | register struct Lisp_String *p; |
| 127 | CHECK_STRING (str, 0); |
| 128 | |
| 129 | p = XSTRING (str); |
| 130 | if (p->size) |
| 131 | XFASTINT (val) = ((unsigned char *) p->data)[0]; |
| 132 | else |
| 133 | XFASTINT (val) = 0; |
| 134 | return val; |
| 135 | } |
| 136 | \f |
| 137 | static Lisp_Object |
| 138 | buildmark (val) |
| 139 | int val; |
| 140 | { |
| 141 | register Lisp_Object mark; |
| 142 | mark = Fmake_marker (); |
| 143 | Fset_marker (mark, make_number (val), Qnil); |
| 144 | return mark; |
| 145 | } |
| 146 | |
| 147 | DEFUN ("point", Fpoint, Spoint, 0, 0, 0, |
| 148 | "Return value of point, as an integer.\n\ |
| 149 | Beginning of buffer is position (point-min)") |
| 150 | () |
| 151 | { |
| 152 | Lisp_Object temp; |
| 153 | XFASTINT (temp) = point; |
| 154 | return temp; |
| 155 | } |
| 156 | |
| 157 | DEFUN ("point-marker", Fpoint_marker, Spoint_marker, 0, 0, 0, |
| 158 | "Return value of point, as a marker object.") |
| 159 | () |
| 160 | { |
| 161 | return buildmark (point); |
| 162 | } |
| 163 | |
| 164 | int |
| 165 | clip_to_bounds (lower, num, upper) |
| 166 | int lower, num, upper; |
| 167 | { |
| 168 | if (num < lower) |
| 169 | return lower; |
| 170 | else if (num > upper) |
| 171 | return upper; |
| 172 | else |
| 173 | return num; |
| 174 | } |
| 175 | |
| 176 | DEFUN ("goto-char", Fgoto_char, Sgoto_char, 1, 1, "NGoto char: ", |
| 177 | "Set point to POSITION, a number or marker.\n\ |
| 178 | Beginning of buffer is position (point-min), end is (point-max).") |
| 179 | (n) |
| 180 | register Lisp_Object n; |
| 181 | { |
| 182 | CHECK_NUMBER_COERCE_MARKER (n, 0); |
| 183 | |
| 184 | SET_PT (clip_to_bounds (BEGV, XINT (n), ZV)); |
| 185 | return n; |
| 186 | } |
| 187 | |
| 188 | static Lisp_Object |
| 189 | region_limit (beginningp) |
| 190 | int beginningp; |
| 191 | { |
| 192 | extern Lisp_Object Vmark_even_if_inactive; /* Defined in callint.c. */ |
| 193 | register Lisp_Object m; |
| 194 | if (!NILP (Vtransient_mark_mode) && NILP (Vmark_even_if_inactive) |
| 195 | && NILP (current_buffer->mark_active)) |
| 196 | Fsignal (Qmark_inactive, Qnil); |
| 197 | m = Fmarker_position (current_buffer->mark); |
| 198 | if (NILP (m)) error ("There is no region now"); |
| 199 | if ((point < XFASTINT (m)) == beginningp) |
| 200 | return (make_number (point)); |
| 201 | else |
| 202 | return (m); |
| 203 | } |
| 204 | |
| 205 | DEFUN ("region-beginning", Fregion_beginning, Sregion_beginning, 0, 0, 0, |
| 206 | "Return position of beginning of region, as an integer.") |
| 207 | () |
| 208 | { |
| 209 | return (region_limit (1)); |
| 210 | } |
| 211 | |
| 212 | DEFUN ("region-end", Fregion_end, Sregion_end, 0, 0, 0, |
| 213 | "Return position of end of region, as an integer.") |
| 214 | () |
| 215 | { |
| 216 | return (region_limit (0)); |
| 217 | } |
| 218 | |
| 219 | #if 0 /* now in lisp code */ |
| 220 | DEFUN ("mark", Fmark, Smark, 0, 0, 0, |
| 221 | "Return this buffer's mark value as integer, or nil if no mark.\n\ |
| 222 | If you are using this in an editing command, you are most likely making\n\ |
| 223 | a mistake; see the documentation of `set-mark'.") |
| 224 | () |
| 225 | { |
| 226 | return Fmarker_position (current_buffer->mark); |
| 227 | } |
| 228 | #endif /* commented out code */ |
| 229 | |
| 230 | DEFUN ("mark-marker", Fmark_marker, Smark_marker, 0, 0, 0, |
| 231 | "Return this buffer's mark, as a marker object.\n\ |
| 232 | Watch out! Moving this marker changes the mark position.\n\ |
| 233 | If you set the marker not to point anywhere, the buffer will have no mark.") |
| 234 | () |
| 235 | { |
| 236 | return current_buffer->mark; |
| 237 | } |
| 238 | |
| 239 | #if 0 /* this is now in lisp code */ |
| 240 | DEFUN ("set-mark", Fset_mark, Sset_mark, 1, 1, 0, |
| 241 | "Set this buffer's mark to POS. Don't use this function!\n\ |
| 242 | That is to say, don't use this function unless you want\n\ |
| 243 | the user to see that the mark has moved, and you want the previous\n\ |
| 244 | mark position to be lost.\n\ |
| 245 | \n\ |
| 246 | Normally, when a new mark is set, the old one should go on the stack.\n\ |
| 247 | This is why most applications should use push-mark, not set-mark.\n\ |
| 248 | \n\ |
| 249 | Novice programmers often try to use the mark for the wrong purposes.\n\ |
| 250 | The mark saves a location for the user's convenience.\n\ |
| 251 | Most editing commands should not alter the mark.\n\ |
| 252 | To remember a location for internal use in the Lisp program,\n\ |
| 253 | store it in a Lisp variable. Example:\n\ |
| 254 | \n\ |
| 255 | (let ((beg (point))) (forward-line 1) (delete-region beg (point))).") |
| 256 | (pos) |
| 257 | Lisp_Object pos; |
| 258 | { |
| 259 | if (NILP (pos)) |
| 260 | { |
| 261 | current_buffer->mark = Qnil; |
| 262 | return Qnil; |
| 263 | } |
| 264 | CHECK_NUMBER_COERCE_MARKER (pos, 0); |
| 265 | |
| 266 | if (NILP (current_buffer->mark)) |
| 267 | current_buffer->mark = Fmake_marker (); |
| 268 | |
| 269 | Fset_marker (current_buffer->mark, pos, Qnil); |
| 270 | return pos; |
| 271 | } |
| 272 | #endif /* commented-out code */ |
| 273 | |
| 274 | Lisp_Object |
| 275 | save_excursion_save () |
| 276 | { |
| 277 | register int visible = (XBUFFER (XWINDOW (selected_window)->buffer) |
| 278 | == current_buffer); |
| 279 | |
| 280 | return Fcons (Fpoint_marker (), |
| 281 | Fcons (Fcopy_marker (current_buffer->mark), |
| 282 | Fcons (visible ? Qt : Qnil, |
| 283 | current_buffer->mark_active))); |
| 284 | } |
| 285 | |
| 286 | Lisp_Object |
| 287 | save_excursion_restore (info) |
| 288 | register Lisp_Object info; |
| 289 | { |
| 290 | register Lisp_Object tem, tem1, omark, nmark; |
| 291 | |
| 292 | tem = Fmarker_buffer (Fcar (info)); |
| 293 | /* If buffer being returned to is now deleted, avoid error */ |
| 294 | /* Otherwise could get error here while unwinding to top level |
| 295 | and crash */ |
| 296 | /* In that case, Fmarker_buffer returns nil now. */ |
| 297 | if (NILP (tem)) |
| 298 | return Qnil; |
| 299 | Fset_buffer (tem); |
| 300 | tem = Fcar (info); |
| 301 | Fgoto_char (tem); |
| 302 | unchain_marker (tem); |
| 303 | tem = Fcar (Fcdr (info)); |
| 304 | omark = Fmarker_position (current_buffer->mark); |
| 305 | Fset_marker (current_buffer->mark, tem, Fcurrent_buffer ()); |
| 306 | nmark = Fmarker_position (tem); |
| 307 | unchain_marker (tem); |
| 308 | tem = Fcdr (Fcdr (info)); |
| 309 | #if 0 /* We used to make the current buffer visible in the selected window |
| 310 | if that was true previously. That avoids some anomalies. |
| 311 | But it creates others, and it wasn't documented, and it is simpler |
| 312 | and cleaner never to alter the window/buffer connections. */ |
| 313 | tem1 = Fcar (tem); |
| 314 | if (!NILP (tem1) |
| 315 | && current_buffer != XBUFFER (XWINDOW (selected_window)->buffer)) |
| 316 | Fswitch_to_buffer (Fcurrent_buffer (), Qnil); |
| 317 | #endif /* 0 */ |
| 318 | |
| 319 | tem1 = current_buffer->mark_active; |
| 320 | current_buffer->mark_active = Fcdr (tem); |
| 321 | if (!NILP (Vrun_hooks)) |
| 322 | { |
| 323 | /* If mark is active now, and either was not active |
| 324 | or was at a different place, run the activate hook. */ |
| 325 | if (! NILP (current_buffer->mark_active)) |
| 326 | { |
| 327 | if (! EQ (omark, nmark)) |
| 328 | call1 (Vrun_hooks, intern ("activate-mark-hook")); |
| 329 | } |
| 330 | /* If mark has ceased to be active, run deactivate hook. */ |
| 331 | else if (! NILP (tem1)) |
| 332 | call1 (Vrun_hooks, intern ("deactivate-mark-hook")); |
| 333 | } |
| 334 | return Qnil; |
| 335 | } |
| 336 | |
| 337 | DEFUN ("save-excursion", Fsave_excursion, Ssave_excursion, 0, UNEVALLED, 0, |
| 338 | "Save point, mark, and current buffer; execute BODY; restore those things.\n\ |
| 339 | Executes BODY just like `progn'.\n\ |
| 340 | The values of point, mark and the current buffer are restored\n\ |
| 341 | even in case of abnormal exit (throw or error).\n\ |
| 342 | The state of activation of the mark is also restored.") |
| 343 | (args) |
| 344 | Lisp_Object args; |
| 345 | { |
| 346 | register Lisp_Object val; |
| 347 | int count = specpdl_ptr - specpdl; |
| 348 | |
| 349 | record_unwind_protect (save_excursion_restore, save_excursion_save ()); |
| 350 | |
| 351 | val = Fprogn (args); |
| 352 | return unbind_to (count, val); |
| 353 | } |
| 354 | \f |
| 355 | DEFUN ("buffer-size", Fbufsize, Sbufsize, 0, 0, 0, |
| 356 | "Return the number of characters in the current buffer.") |
| 357 | () |
| 358 | { |
| 359 | Lisp_Object temp; |
| 360 | XFASTINT (temp) = Z - BEG; |
| 361 | return temp; |
| 362 | } |
| 363 | |
| 364 | DEFUN ("point-min", Fpoint_min, Spoint_min, 0, 0, 0, |
| 365 | "Return the minimum permissible value of point in the current buffer.\n\ |
| 366 | This is 1, unless narrowing (a buffer restriction) is in effect.") |
| 367 | () |
| 368 | { |
| 369 | Lisp_Object temp; |
| 370 | XFASTINT (temp) = BEGV; |
| 371 | return temp; |
| 372 | } |
| 373 | |
| 374 | DEFUN ("point-min-marker", Fpoint_min_marker, Spoint_min_marker, 0, 0, 0, |
| 375 | "Return a marker to the minimum permissible value of point in this buffer.\n\ |
| 376 | This is the beginning, unless narrowing (a buffer restriction) is in effect.") |
| 377 | () |
| 378 | { |
| 379 | return buildmark (BEGV); |
| 380 | } |
| 381 | |
| 382 | DEFUN ("point-max", Fpoint_max, Spoint_max, 0, 0, 0, |
| 383 | "Return the maximum permissible value of point in the current buffer.\n\ |
| 384 | This is (1+ (buffer-size)), unless narrowing (a buffer restriction)\n\ |
| 385 | is in effect, in which case it is less.") |
| 386 | () |
| 387 | { |
| 388 | Lisp_Object temp; |
| 389 | XFASTINT (temp) = ZV; |
| 390 | return temp; |
| 391 | } |
| 392 | |
| 393 | DEFUN ("point-max-marker", Fpoint_max_marker, Spoint_max_marker, 0, 0, 0, |
| 394 | "Return a marker to the maximum permissible value of point in this buffer.\n\ |
| 395 | This is (1+ (buffer-size)), unless narrowing (a buffer restriction)\n\ |
| 396 | is in effect, in which case it is less.") |
| 397 | () |
| 398 | { |
| 399 | return buildmark (ZV); |
| 400 | } |
| 401 | |
| 402 | DEFUN ("following-char", Ffollowing_char, Sfollowing_char, 0, 0, 0, |
| 403 | "Return the character following point, as a number.\n\ |
| 404 | At the end of the buffer or accessible region, return 0.") |
| 405 | () |
| 406 | { |
| 407 | Lisp_Object temp; |
| 408 | if (point >= ZV) |
| 409 | XFASTINT (temp) = 0; |
| 410 | else |
| 411 | XFASTINT (temp) = FETCH_CHAR (point); |
| 412 | return temp; |
| 413 | } |
| 414 | |
| 415 | DEFUN ("preceding-char", Fprevious_char, Sprevious_char, 0, 0, 0, |
| 416 | "Return the character preceding point, as a number.\n\ |
| 417 | At the beginning of the buffer or accessible region, return 0.") |
| 418 | () |
| 419 | { |
| 420 | Lisp_Object temp; |
| 421 | if (point <= BEGV) |
| 422 | XFASTINT (temp) = 0; |
| 423 | else |
| 424 | XFASTINT (temp) = FETCH_CHAR (point - 1); |
| 425 | return temp; |
| 426 | } |
| 427 | |
| 428 | DEFUN ("bobp", Fbobp, Sbobp, 0, 0, 0, |
| 429 | "Return T if point is at the beginning of the buffer.\n\ |
| 430 | If the buffer is narrowed, this means the beginning of the narrowed part.") |
| 431 | () |
| 432 | { |
| 433 | if (point == BEGV) |
| 434 | return Qt; |
| 435 | return Qnil; |
| 436 | } |
| 437 | |
| 438 | DEFUN ("eobp", Feobp, Seobp, 0, 0, 0, |
| 439 | "Return T if point is at the end of the buffer.\n\ |
| 440 | If the buffer is narrowed, this means the end of the narrowed part.") |
| 441 | () |
| 442 | { |
| 443 | if (point == ZV) |
| 444 | return Qt; |
| 445 | return Qnil; |
| 446 | } |
| 447 | |
| 448 | DEFUN ("bolp", Fbolp, Sbolp, 0, 0, 0, |
| 449 | "Return T if point is at the beginning of a line.") |
| 450 | () |
| 451 | { |
| 452 | if (point == BEGV || FETCH_CHAR (point - 1) == '\n') |
| 453 | return Qt; |
| 454 | return Qnil; |
| 455 | } |
| 456 | |
| 457 | DEFUN ("eolp", Feolp, Seolp, 0, 0, 0, |
| 458 | "Return T if point is at the end of a line.\n\ |
| 459 | `End of a line' includes point being at the end of the buffer.") |
| 460 | () |
| 461 | { |
| 462 | if (point == ZV || FETCH_CHAR (point) == '\n') |
| 463 | return Qt; |
| 464 | return Qnil; |
| 465 | } |
| 466 | |
| 467 | DEFUN ("char-after", Fchar_after, Schar_after, 1, 1, 0, |
| 468 | "Return character in current buffer at position POS.\n\ |
| 469 | POS is an integer or a buffer pointer.\n\ |
| 470 | If POS is out of range, the value is nil.") |
| 471 | (pos) |
| 472 | Lisp_Object pos; |
| 473 | { |
| 474 | register Lisp_Object val; |
| 475 | register int n; |
| 476 | |
| 477 | CHECK_NUMBER_COERCE_MARKER (pos, 0); |
| 478 | |
| 479 | n = XINT (pos); |
| 480 | if (n < BEGV || n >= ZV) return Qnil; |
| 481 | |
| 482 | XFASTINT (val) = FETCH_CHAR (n); |
| 483 | return val; |
| 484 | } |
| 485 | \f |
| 486 | DEFUN ("user-login-name", Fuser_login_name, Suser_login_name, 0, 0, 0, |
| 487 | "Return the name under which the user logged in, as a string.\n\ |
| 488 | This is based on the effective uid, not the real uid.\n\ |
| 489 | Also, if the environment variable LOGNAME or USER is set,\n\ |
| 490 | that determines the value of this function.") |
| 491 | () |
| 492 | { |
| 493 | return Vuser_name; |
| 494 | } |
| 495 | |
| 496 | DEFUN ("user-real-login-name", Fuser_real_login_name, Suser_real_login_name, |
| 497 | 0, 0, 0, |
| 498 | "Return the name of the user's real uid, as a string.\n\ |
| 499 | This ignores the environment variables LOGNAME and USER, so it differs from\n\ |
| 500 | `user-login-name' when running under `su'.") |
| 501 | () |
| 502 | { |
| 503 | return Vuser_real_name; |
| 504 | } |
| 505 | |
| 506 | DEFUN ("user-uid", Fuser_uid, Suser_uid, 0, 0, 0, |
| 507 | "Return the effective uid of Emacs, as an integer.") |
| 508 | () |
| 509 | { |
| 510 | return make_number (geteuid ()); |
| 511 | } |
| 512 | |
| 513 | DEFUN ("user-real-uid", Fuser_real_uid, Suser_real_uid, 0, 0, 0, |
| 514 | "Return the real uid of Emacs, as an integer.") |
| 515 | () |
| 516 | { |
| 517 | return make_number (getuid ()); |
| 518 | } |
| 519 | |
| 520 | DEFUN ("user-full-name", Fuser_full_name, Suser_full_name, 0, 0, 0, |
| 521 | "Return the full name of the user logged in, as a string.") |
| 522 | () |
| 523 | { |
| 524 | return Vuser_full_name; |
| 525 | } |
| 526 | |
| 527 | DEFUN ("system-name", Fsystem_name, Ssystem_name, 0, 0, 0, |
| 528 | "Return the name of the machine you are running on, as a string.") |
| 529 | () |
| 530 | { |
| 531 | return Vsystem_name; |
| 532 | } |
| 533 | |
| 534 | /* For the benefit of callers who don't want to include lisp.h */ |
| 535 | char * |
| 536 | get_system_name () |
| 537 | { |
| 538 | return (char *) XSTRING (Vsystem_name)->data; |
| 539 | } |
| 540 | |
| 541 | DEFUN ("emacs-pid", Femacs_pid, Semacs_pid, 0, 0, 0, |
| 542 | "Return the process ID of Emacs, as an integer.") |
| 543 | () |
| 544 | { |
| 545 | return make_number (getpid ()); |
| 546 | } |
| 547 | |
| 548 | DEFUN ("current-time", Fcurrent_time, Scurrent_time, 0, 0, 0, |
| 549 | "Return the current time, as the number of seconds since 12:00 AM January 1970.\n\ |
| 550 | The time is returned as a list of three integers. The first has the\n\ |
| 551 | most significant 16 bits of the seconds, while the second has the\n\ |
| 552 | least significant 16 bits. The third integer gives the microsecond\n\ |
| 553 | count.\n\ |
| 554 | \n\ |
| 555 | The microsecond count is zero on systems that do not provide\n\ |
| 556 | resolution finer than a second.") |
| 557 | () |
| 558 | { |
| 559 | EMACS_TIME t; |
| 560 | Lisp_Object result[3]; |
| 561 | |
| 562 | EMACS_GET_TIME (t); |
| 563 | XSET (result[0], Lisp_Int, (EMACS_SECS (t) >> 16) & 0xffff); |
| 564 | XSET (result[1], Lisp_Int, (EMACS_SECS (t) >> 0) & 0xffff); |
| 565 | XSET (result[2], Lisp_Int, EMACS_USECS (t)); |
| 566 | |
| 567 | return Flist (3, result); |
| 568 | } |
| 569 | \f |
| 570 | |
| 571 | static int |
| 572 | lisp_time_argument (specified_time, result) |
| 573 | Lisp_Object specified_time; |
| 574 | time_t *result; |
| 575 | { |
| 576 | if (NILP (specified_time)) |
| 577 | return time (result) != -1; |
| 578 | else |
| 579 | { |
| 580 | Lisp_Object high, low; |
| 581 | high = Fcar (specified_time); |
| 582 | CHECK_NUMBER (high, 0); |
| 583 | low = Fcdr (specified_time); |
| 584 | if (XTYPE (low) == Lisp_Cons) |
| 585 | low = Fcar (low); |
| 586 | CHECK_NUMBER (low, 0); |
| 587 | *result = (XINT (high) << 16) + (XINT (low) & 0xffff); |
| 588 | return *result >> 16 == XINT (high); |
| 589 | } |
| 590 | } |
| 591 | |
| 592 | DEFUN ("current-time-string", Fcurrent_time_string, Scurrent_time_string, 0, 1, 0, |
| 593 | "Return the current time, as a human-readable string.\n\ |
| 594 | Programs can use this function to decode a time,\n\ |
| 595 | since the number of columns in each field is fixed.\n\ |
| 596 | The format is `Sun Sep 16 01:03:52 1973'.\n\ |
| 597 | If an argument is given, it specifies a time to format\n\ |
| 598 | instead of the current time. The argument should have the form:\n\ |
| 599 | (HIGH . LOW)\n\ |
| 600 | or the form:\n\ |
| 601 | (HIGH LOW . IGNORED).\n\ |
| 602 | Thus, you can use times obtained from `current-time'\n\ |
| 603 | and from `file-attributes'.") |
| 604 | (specified_time) |
| 605 | Lisp_Object specified_time; |
| 606 | { |
| 607 | time_t value; |
| 608 | char buf[30]; |
| 609 | register char *tem; |
| 610 | |
| 611 | if (! lisp_time_argument (specified_time, &value)) |
| 612 | value = -1; |
| 613 | tem = (char *) ctime (&value); |
| 614 | |
| 615 | strncpy (buf, tem, 24); |
| 616 | buf[24] = 0; |
| 617 | |
| 618 | return build_string (buf); |
| 619 | } |
| 620 | |
| 621 | #define TM_YEAR_ORIGIN 1900 |
| 622 | |
| 623 | /* Yield A - B, measured in seconds. */ |
| 624 | static long |
| 625 | difftm (a, b) |
| 626 | struct tm *a, *b; |
| 627 | { |
| 628 | int ay = a->tm_year + (TM_YEAR_ORIGIN - 1); |
| 629 | int by = b->tm_year + (TM_YEAR_ORIGIN - 1); |
| 630 | /* Some compilers can't handle this as a single return statement. */ |
| 631 | long days = ( |
| 632 | /* difference in day of year */ |
| 633 | a->tm_yday - b->tm_yday |
| 634 | /* + intervening leap days */ |
| 635 | + ((ay >> 2) - (by >> 2)) |
| 636 | - (ay/100 - by/100) |
| 637 | + ((ay/100 >> 2) - (by/100 >> 2)) |
| 638 | /* + difference in years * 365 */ |
| 639 | + (long)(ay-by) * 365 |
| 640 | ); |
| 641 | return (60*(60*(24*days + (a->tm_hour - b->tm_hour)) |
| 642 | + (a->tm_min - b->tm_min)) |
| 643 | + (a->tm_sec - b->tm_sec)); |
| 644 | } |
| 645 | |
| 646 | DEFUN ("current-time-zone", Fcurrent_time_zone, Scurrent_time_zone, 0, 1, 0, |
| 647 | "Return the offset and name for the local time zone.\n\ |
| 648 | This returns a list of the form (OFFSET NAME).\n\ |
| 649 | OFFSET is an integer number of seconds ahead of UTC (east of Greenwich).\n\ |
| 650 | A negative value means west of Greenwich.\n\ |
| 651 | NAME is a string giving the name of the time zone.\n\ |
| 652 | If an argument is given, it specifies when the time zone offset is determined\n\ |
| 653 | instead of using the current time. The argument should have the form:\n\ |
| 654 | (HIGH . LOW)\n\ |
| 655 | or the form:\n\ |
| 656 | (HIGH LOW . IGNORED).\n\ |
| 657 | Thus, you can use times obtained from `current-time'\n\ |
| 658 | and from `file-attributes'.\n\ |
| 659 | \n\ |
| 660 | Some operating systems cannot provide all this information to Emacs;\n\ |
| 661 | in this case, `current-time-zone' returns a list containing nil for\n\ |
| 662 | the data it can't find.") |
| 663 | (specified_time) |
| 664 | Lisp_Object specified_time; |
| 665 | { |
| 666 | time_t value; |
| 667 | struct tm *t; |
| 668 | |
| 669 | if (lisp_time_argument (specified_time, &value) |
| 670 | && (t = gmtime (&value)) != 0) |
| 671 | { |
| 672 | struct tm gmt; |
| 673 | long offset; |
| 674 | char *s, buf[6]; |
| 675 | |
| 676 | gmt = *t; /* Make a copy, in case localtime modifies *t. */ |
| 677 | t = localtime (&value); |
| 678 | offset = difftm (t, &gmt); |
| 679 | s = 0; |
| 680 | #ifdef HAVE_TM_ZONE |
| 681 | if (t->tm_zone) |
| 682 | s = (char *)t->tm_zone; |
| 683 | #else /* not HAVE_TM_ZONE */ |
| 684 | #ifdef HAVE_TZNAME |
| 685 | if (t->tm_isdst == 0 || t->tm_isdst == 1) |
| 686 | s = tzname[t->tm_isdst]; |
| 687 | #endif |
| 688 | #endif /* not HAVE_TM_ZONE */ |
| 689 | if (!s) |
| 690 | { |
| 691 | /* No local time zone name is available; use "+-NNNN" instead. */ |
| 692 | int am = (offset < 0 ? -offset : offset) / 60; |
| 693 | sprintf (buf, "%c%02d%02d", (offset < 0 ? '-' : '+'), am/60, am%60); |
| 694 | s = buf; |
| 695 | } |
| 696 | return Fcons (make_number (offset), Fcons (build_string (s), Qnil)); |
| 697 | } |
| 698 | else |
| 699 | return Fmake_list (2, Qnil); |
| 700 | } |
| 701 | |
| 702 | \f |
| 703 | void |
| 704 | insert1 (arg) |
| 705 | Lisp_Object arg; |
| 706 | { |
| 707 | Finsert (1, &arg); |
| 708 | } |
| 709 | |
| 710 | |
| 711 | /* Callers passing one argument to Finsert need not gcpro the |
| 712 | argument "array", since the only element of the array will |
| 713 | not be used after calling insert or insert_from_string, so |
| 714 | we don't care if it gets trashed. */ |
| 715 | |
| 716 | DEFUN ("insert", Finsert, Sinsert, 0, MANY, 0, |
| 717 | "Insert the arguments, either strings or characters, at point.\n\ |
| 718 | Point moves forward so that it ends up after the inserted text.\n\ |
| 719 | Any other markers at the point of insertion remain before the text.") |
| 720 | (nargs, args) |
| 721 | int nargs; |
| 722 | register Lisp_Object *args; |
| 723 | { |
| 724 | register int argnum; |
| 725 | register Lisp_Object tem; |
| 726 | char str[1]; |
| 727 | |
| 728 | for (argnum = 0; argnum < nargs; argnum++) |
| 729 | { |
| 730 | tem = args[argnum]; |
| 731 | retry: |
| 732 | if (XTYPE (tem) == Lisp_Int) |
| 733 | { |
| 734 | str[0] = XINT (tem); |
| 735 | insert (str, 1); |
| 736 | } |
| 737 | else if (XTYPE (tem) == Lisp_String) |
| 738 | { |
| 739 | insert_from_string (tem, 0, XSTRING (tem)->size, 0); |
| 740 | } |
| 741 | else |
| 742 | { |
| 743 | tem = wrong_type_argument (Qchar_or_string_p, tem); |
| 744 | goto retry; |
| 745 | } |
| 746 | } |
| 747 | |
| 748 | return Qnil; |
| 749 | } |
| 750 | |
| 751 | DEFUN ("insert-and-inherit", Finsert_and_inherit, Sinsert_and_inherit, |
| 752 | 0, MANY, 0, |
| 753 | "Insert the arguments at point, inheriting properties from adjoining text.\n\ |
| 754 | Point moves forward so that it ends up after the inserted text.\n\ |
| 755 | Any other markers at the point of insertion remain before the text.") |
| 756 | (nargs, args) |
| 757 | int nargs; |
| 758 | register Lisp_Object *args; |
| 759 | { |
| 760 | register int argnum; |
| 761 | register Lisp_Object tem; |
| 762 | char str[1]; |
| 763 | |
| 764 | for (argnum = 0; argnum < nargs; argnum++) |
| 765 | { |
| 766 | tem = args[argnum]; |
| 767 | retry: |
| 768 | if (XTYPE (tem) == Lisp_Int) |
| 769 | { |
| 770 | str[0] = XINT (tem); |
| 771 | insert_and_inherit (str, 1); |
| 772 | } |
| 773 | else if (XTYPE (tem) == Lisp_String) |
| 774 | { |
| 775 | insert_from_string (tem, 0, XSTRING (tem)->size, 1); |
| 776 | } |
| 777 | else |
| 778 | { |
| 779 | tem = wrong_type_argument (Qchar_or_string_p, tem); |
| 780 | goto retry; |
| 781 | } |
| 782 | } |
| 783 | |
| 784 | return Qnil; |
| 785 | } |
| 786 | |
| 787 | DEFUN ("insert-before-markers", Finsert_before_markers, Sinsert_before_markers, 0, MANY, 0, |
| 788 | "Insert strings or characters at point, relocating markers after the text.\n\ |
| 789 | Point moves forward so that it ends up after the inserted text.\n\ |
| 790 | Any other markers at the point of insertion also end up after the text.") |
| 791 | (nargs, args) |
| 792 | int nargs; |
| 793 | register Lisp_Object *args; |
| 794 | { |
| 795 | register int argnum; |
| 796 | register Lisp_Object tem; |
| 797 | char str[1]; |
| 798 | |
| 799 | for (argnum = 0; argnum < nargs; argnum++) |
| 800 | { |
| 801 | tem = args[argnum]; |
| 802 | retry: |
| 803 | if (XTYPE (tem) == Lisp_Int) |
| 804 | { |
| 805 | str[0] = XINT (tem); |
| 806 | insert_before_markers (str, 1); |
| 807 | } |
| 808 | else if (XTYPE (tem) == Lisp_String) |
| 809 | { |
| 810 | insert_from_string_before_markers (tem, 0, XSTRING (tem)->size, 0); |
| 811 | } |
| 812 | else |
| 813 | { |
| 814 | tem = wrong_type_argument (Qchar_or_string_p, tem); |
| 815 | goto retry; |
| 816 | } |
| 817 | } |
| 818 | |
| 819 | return Qnil; |
| 820 | } |
| 821 | |
| 822 | DEFUN ("insert-before-markers-and-inherit", |
| 823 | Finsert_and_inherit_before_markers, Sinsert_and_inherit_before_markers, |
| 824 | 0, MANY, 0, |
| 825 | "Insert text at point, relocating markers and inheriting properties.\n\ |
| 826 | Point moves forward so that it ends up after the inserted text.\n\ |
| 827 | Any other markers at the point of insertion also end up after the text.") |
| 828 | (nargs, args) |
| 829 | int nargs; |
| 830 | register Lisp_Object *args; |
| 831 | { |
| 832 | register int argnum; |
| 833 | register Lisp_Object tem; |
| 834 | char str[1]; |
| 835 | |
| 836 | for (argnum = 0; argnum < nargs; argnum++) |
| 837 | { |
| 838 | tem = args[argnum]; |
| 839 | retry: |
| 840 | if (XTYPE (tem) == Lisp_Int) |
| 841 | { |
| 842 | str[0] = XINT (tem); |
| 843 | insert_before_markers_and_inherit (str, 1); |
| 844 | } |
| 845 | else if (XTYPE (tem) == Lisp_String) |
| 846 | { |
| 847 | insert_from_string_before_markers (tem, 0, XSTRING (tem)->size, 1); |
| 848 | } |
| 849 | else |
| 850 | { |
| 851 | tem = wrong_type_argument (Qchar_or_string_p, tem); |
| 852 | goto retry; |
| 853 | } |
| 854 | } |
| 855 | |
| 856 | return Qnil; |
| 857 | } |
| 858 | \f |
| 859 | DEFUN ("insert-char", Finsert_char, Sinsert_char, 2, 3, 0, |
| 860 | "Insert COUNT (second arg) copies of CHAR (first arg).\n\ |
| 861 | Point and all markers are affected as in the function `insert'.\n\ |
| 862 | Both arguments are required.\n\ |
| 863 | The optional third arg INHERIT, if non-nil, says to inherit text properties\n\ |
| 864 | from adjoining text, if those properties are sticky.") |
| 865 | (chr, count, inherit) |
| 866 | Lisp_Object chr, count, inherit; |
| 867 | { |
| 868 | register unsigned char *string; |
| 869 | register int strlen; |
| 870 | register int i, n; |
| 871 | |
| 872 | CHECK_NUMBER (chr, 0); |
| 873 | CHECK_NUMBER (count, 1); |
| 874 | |
| 875 | n = XINT (count); |
| 876 | if (n <= 0) |
| 877 | return Qnil; |
| 878 | strlen = min (n, 256); |
| 879 | string = (unsigned char *) alloca (strlen); |
| 880 | for (i = 0; i < strlen; i++) |
| 881 | string[i] = XFASTINT (chr); |
| 882 | while (n >= strlen) |
| 883 | { |
| 884 | if (!NILP (inherit)) |
| 885 | insert_and_inherit (string, strlen); |
| 886 | else |
| 887 | insert (string, strlen); |
| 888 | n -= strlen; |
| 889 | } |
| 890 | if (n > 0) |
| 891 | insert (string, n); |
| 892 | return Qnil; |
| 893 | } |
| 894 | |
| 895 | \f |
| 896 | /* Making strings from buffer contents. */ |
| 897 | |
| 898 | /* Return a Lisp_String containing the text of the current buffer from |
| 899 | START to END. If text properties are in use and the current buffer |
| 900 | has properties in the range specified, the resulting string will also |
| 901 | have them. |
| 902 | |
| 903 | We don't want to use plain old make_string here, because it calls |
| 904 | make_uninit_string, which can cause the buffer arena to be |
| 905 | compacted. make_string has no way of knowing that the data has |
| 906 | been moved, and thus copies the wrong data into the string. This |
| 907 | doesn't effect most of the other users of make_string, so it should |
| 908 | be left as is. But we should use this function when conjuring |
| 909 | buffer substrings. */ |
| 910 | |
| 911 | Lisp_Object |
| 912 | make_buffer_string (start, end) |
| 913 | int start, end; |
| 914 | { |
| 915 | Lisp_Object result, tem, tem1; |
| 916 | |
| 917 | if (start < GPT && GPT < end) |
| 918 | move_gap (start); |
| 919 | |
| 920 | result = make_uninit_string (end - start); |
| 921 | bcopy (&FETCH_CHAR (start), XSTRING (result)->data, end - start); |
| 922 | |
| 923 | tem = Fnext_property_change (make_number (start), Qnil, make_number (end)); |
| 924 | tem1 = Ftext_properties_at (make_number (start), Qnil); |
| 925 | |
| 926 | #ifdef USE_TEXT_PROPERTIES |
| 927 | if (XINT (tem) != end || !NILP (tem1)) |
| 928 | copy_intervals_to_string (result, current_buffer, start, end - start); |
| 929 | #endif |
| 930 | |
| 931 | return result; |
| 932 | } |
| 933 | |
| 934 | DEFUN ("buffer-substring", Fbuffer_substring, Sbuffer_substring, 2, 2, 0, |
| 935 | "Return the contents of part of the current buffer as a string.\n\ |
| 936 | The two arguments START and END are character positions;\n\ |
| 937 | they can be in either order.") |
| 938 | (b, e) |
| 939 | Lisp_Object b, e; |
| 940 | { |
| 941 | register int beg, end; |
| 942 | |
| 943 | validate_region (&b, &e); |
| 944 | beg = XINT (b); |
| 945 | end = XINT (e); |
| 946 | |
| 947 | return make_buffer_string (beg, end); |
| 948 | } |
| 949 | |
| 950 | DEFUN ("buffer-string", Fbuffer_string, Sbuffer_string, 0, 0, 0, |
| 951 | "Return the contents of the current buffer as a string.") |
| 952 | () |
| 953 | { |
| 954 | return make_buffer_string (BEGV, ZV); |
| 955 | } |
| 956 | |
| 957 | DEFUN ("insert-buffer-substring", Finsert_buffer_substring, Sinsert_buffer_substring, |
| 958 | 1, 3, 0, |
| 959 | "Insert before point a substring of the contents of buffer BUFFER.\n\ |
| 960 | BUFFER may be a buffer or a buffer name.\n\ |
| 961 | Arguments START and END are character numbers specifying the substring.\n\ |
| 962 | They default to the beginning and the end of BUFFER.") |
| 963 | (buf, b, e) |
| 964 | Lisp_Object buf, b, e; |
| 965 | { |
| 966 | register int beg, end, temp, len, opoint, start; |
| 967 | register struct buffer *bp; |
| 968 | Lisp_Object buffer; |
| 969 | |
| 970 | buffer = Fget_buffer (buf); |
| 971 | if (NILP (buffer)) |
| 972 | nsberror (buf); |
| 973 | bp = XBUFFER (buffer); |
| 974 | |
| 975 | if (NILP (b)) |
| 976 | beg = BUF_BEGV (bp); |
| 977 | else |
| 978 | { |
| 979 | CHECK_NUMBER_COERCE_MARKER (b, 0); |
| 980 | beg = XINT (b); |
| 981 | } |
| 982 | if (NILP (e)) |
| 983 | end = BUF_ZV (bp); |
| 984 | else |
| 985 | { |
| 986 | CHECK_NUMBER_COERCE_MARKER (e, 1); |
| 987 | end = XINT (e); |
| 988 | } |
| 989 | |
| 990 | if (beg > end) |
| 991 | temp = beg, beg = end, end = temp; |
| 992 | |
| 993 | /* Move the gap or create enough gap in the current buffer. */ |
| 994 | |
| 995 | if (point != GPT) |
| 996 | move_gap (point); |
| 997 | if (GAP_SIZE < end - beg) |
| 998 | make_gap (end - beg - GAP_SIZE); |
| 999 | |
| 1000 | len = end - beg; |
| 1001 | start = beg; |
| 1002 | opoint = point; |
| 1003 | |
| 1004 | if (!(BUF_BEGV (bp) <= beg |
| 1005 | && beg <= end |
| 1006 | && end <= BUF_ZV (bp))) |
| 1007 | args_out_of_range (b, e); |
| 1008 | |
| 1009 | /* Now the actual insertion will not do any gap motion, |
| 1010 | so it matters not if BUF is the current buffer. */ |
| 1011 | if (beg < BUF_GPT (bp)) |
| 1012 | { |
| 1013 | insert (BUF_CHAR_ADDRESS (bp, beg), min (end, BUF_GPT (bp)) - beg); |
| 1014 | beg = min (end, BUF_GPT (bp)); |
| 1015 | } |
| 1016 | if (beg < end) |
| 1017 | insert (BUF_CHAR_ADDRESS (bp, beg), end - beg); |
| 1018 | |
| 1019 | /* Only defined if Emacs is compiled with USE_TEXT_PROPERTIES */ |
| 1020 | graft_intervals_into_buffer (copy_intervals (bp->intervals, start, len), |
| 1021 | opoint, len, current_buffer, 0); |
| 1022 | |
| 1023 | return Qnil; |
| 1024 | } |
| 1025 | |
| 1026 | DEFUN ("compare-buffer-substrings", Fcompare_buffer_substrings, Scompare_buffer_substrings, |
| 1027 | 6, 6, 0, |
| 1028 | "Compare two substrings of two buffers; return result as number.\n\ |
| 1029 | the value is -N if first string is less after N-1 chars,\n\ |
| 1030 | +N if first string is greater after N-1 chars, or 0 if strings match.\n\ |
| 1031 | Each substring is represented as three arguments: BUFFER, START and END.\n\ |
| 1032 | That makes six args in all, three for each substring.\n\n\ |
| 1033 | The value of `case-fold-search' in the current buffer\n\ |
| 1034 | determines whether case is significant or ignored.") |
| 1035 | (buffer1, start1, end1, buffer2, start2, end2) |
| 1036 | Lisp_Object buffer1, start1, end1, buffer2, start2, end2; |
| 1037 | { |
| 1038 | register int begp1, endp1, begp2, endp2, temp, len1, len2, length, i; |
| 1039 | register struct buffer *bp1, *bp2; |
| 1040 | register unsigned char *trt |
| 1041 | = (!NILP (current_buffer->case_fold_search) |
| 1042 | ? XSTRING (current_buffer->case_canon_table)->data : 0); |
| 1043 | |
| 1044 | /* Find the first buffer and its substring. */ |
| 1045 | |
| 1046 | if (NILP (buffer1)) |
| 1047 | bp1 = current_buffer; |
| 1048 | else |
| 1049 | { |
| 1050 | Lisp_Object buf1; |
| 1051 | buf1 = Fget_buffer (buffer1); |
| 1052 | if (NILP (buf1)) |
| 1053 | nsberror (buffer1); |
| 1054 | bp1 = XBUFFER (buf1); |
| 1055 | } |
| 1056 | |
| 1057 | if (NILP (start1)) |
| 1058 | begp1 = BUF_BEGV (bp1); |
| 1059 | else |
| 1060 | { |
| 1061 | CHECK_NUMBER_COERCE_MARKER (start1, 1); |
| 1062 | begp1 = XINT (start1); |
| 1063 | } |
| 1064 | if (NILP (end1)) |
| 1065 | endp1 = BUF_ZV (bp1); |
| 1066 | else |
| 1067 | { |
| 1068 | CHECK_NUMBER_COERCE_MARKER (end1, 2); |
| 1069 | endp1 = XINT (end1); |
| 1070 | } |
| 1071 | |
| 1072 | if (begp1 > endp1) |
| 1073 | temp = begp1, begp1 = endp1, endp1 = temp; |
| 1074 | |
| 1075 | if (!(BUF_BEGV (bp1) <= begp1 |
| 1076 | && begp1 <= endp1 |
| 1077 | && endp1 <= BUF_ZV (bp1))) |
| 1078 | args_out_of_range (start1, end1); |
| 1079 | |
| 1080 | /* Likewise for second substring. */ |
| 1081 | |
| 1082 | if (NILP (buffer2)) |
| 1083 | bp2 = current_buffer; |
| 1084 | else |
| 1085 | { |
| 1086 | Lisp_Object buf2; |
| 1087 | buf2 = Fget_buffer (buffer2); |
| 1088 | if (NILP (buf2)) |
| 1089 | nsberror (buffer2); |
| 1090 | bp2 = XBUFFER (buffer2); |
| 1091 | } |
| 1092 | |
| 1093 | if (NILP (start2)) |
| 1094 | begp2 = BUF_BEGV (bp2); |
| 1095 | else |
| 1096 | { |
| 1097 | CHECK_NUMBER_COERCE_MARKER (start2, 4); |
| 1098 | begp2 = XINT (start2); |
| 1099 | } |
| 1100 | if (NILP (end2)) |
| 1101 | endp2 = BUF_ZV (bp2); |
| 1102 | else |
| 1103 | { |
| 1104 | CHECK_NUMBER_COERCE_MARKER (end2, 5); |
| 1105 | endp2 = XINT (end2); |
| 1106 | } |
| 1107 | |
| 1108 | if (begp2 > endp2) |
| 1109 | temp = begp2, begp2 = endp2, endp2 = temp; |
| 1110 | |
| 1111 | if (!(BUF_BEGV (bp2) <= begp2 |
| 1112 | && begp2 <= endp2 |
| 1113 | && endp2 <= BUF_ZV (bp2))) |
| 1114 | args_out_of_range (start2, end2); |
| 1115 | |
| 1116 | len1 = endp1 - begp1; |
| 1117 | len2 = endp2 - begp2; |
| 1118 | length = len1; |
| 1119 | if (len2 < length) |
| 1120 | length = len2; |
| 1121 | |
| 1122 | for (i = 0; i < length; i++) |
| 1123 | { |
| 1124 | int c1 = *BUF_CHAR_ADDRESS (bp1, begp1 + i); |
| 1125 | int c2 = *BUF_CHAR_ADDRESS (bp2, begp2 + i); |
| 1126 | if (trt) |
| 1127 | { |
| 1128 | c1 = trt[c1]; |
| 1129 | c2 = trt[c2]; |
| 1130 | } |
| 1131 | if (c1 < c2) |
| 1132 | return make_number (- 1 - i); |
| 1133 | if (c1 > c2) |
| 1134 | return make_number (i + 1); |
| 1135 | } |
| 1136 | |
| 1137 | /* The strings match as far as they go. |
| 1138 | If one is shorter, that one is less. */ |
| 1139 | if (length < len1) |
| 1140 | return make_number (length + 1); |
| 1141 | else if (length < len2) |
| 1142 | return make_number (- length - 1); |
| 1143 | |
| 1144 | /* Same length too => they are equal. */ |
| 1145 | return make_number (0); |
| 1146 | } |
| 1147 | \f |
| 1148 | DEFUN ("subst-char-in-region", Fsubst_char_in_region, |
| 1149 | Ssubst_char_in_region, 4, 5, 0, |
| 1150 | "From START to END, replace FROMCHAR with TOCHAR each time it occurs.\n\ |
| 1151 | If optional arg NOUNDO is non-nil, don't record this change for undo\n\ |
| 1152 | and don't mark the buffer as really changed.") |
| 1153 | (start, end, fromchar, tochar, noundo) |
| 1154 | Lisp_Object start, end, fromchar, tochar, noundo; |
| 1155 | { |
| 1156 | register int pos, stop, look; |
| 1157 | int changed = 0; |
| 1158 | |
| 1159 | validate_region (&start, &end); |
| 1160 | CHECK_NUMBER (fromchar, 2); |
| 1161 | CHECK_NUMBER (tochar, 3); |
| 1162 | |
| 1163 | pos = XINT (start); |
| 1164 | stop = XINT (end); |
| 1165 | look = XINT (fromchar); |
| 1166 | |
| 1167 | while (pos < stop) |
| 1168 | { |
| 1169 | if (FETCH_CHAR (pos) == look) |
| 1170 | { |
| 1171 | if (! changed) |
| 1172 | { |
| 1173 | modify_region (current_buffer, XINT (start), stop); |
| 1174 | |
| 1175 | if (! NILP (noundo)) |
| 1176 | { |
| 1177 | if (MODIFF - 1 == current_buffer->save_modified) |
| 1178 | current_buffer->save_modified++; |
| 1179 | if (MODIFF - 1 == current_buffer->auto_save_modified) |
| 1180 | current_buffer->auto_save_modified++; |
| 1181 | } |
| 1182 | |
| 1183 | changed = 1; |
| 1184 | } |
| 1185 | |
| 1186 | if (NILP (noundo)) |
| 1187 | record_change (pos, 1); |
| 1188 | FETCH_CHAR (pos) = XINT (tochar); |
| 1189 | } |
| 1190 | pos++; |
| 1191 | } |
| 1192 | |
| 1193 | if (changed) |
| 1194 | signal_after_change (XINT (start), |
| 1195 | stop - XINT (start), stop - XINT (start)); |
| 1196 | |
| 1197 | return Qnil; |
| 1198 | } |
| 1199 | |
| 1200 | DEFUN ("translate-region", Ftranslate_region, Stranslate_region, 3, 3, 0, |
| 1201 | "From START to END, translate characters according to TABLE.\n\ |
| 1202 | TABLE is a string; the Nth character in it is the mapping\n\ |
| 1203 | for the character with code N. Returns the number of characters changed.") |
| 1204 | (start, end, table) |
| 1205 | Lisp_Object start; |
| 1206 | Lisp_Object end; |
| 1207 | register Lisp_Object table; |
| 1208 | { |
| 1209 | register int pos, stop; /* Limits of the region. */ |
| 1210 | register unsigned char *tt; /* Trans table. */ |
| 1211 | register int oc; /* Old character. */ |
| 1212 | register int nc; /* New character. */ |
| 1213 | int cnt; /* Number of changes made. */ |
| 1214 | Lisp_Object z; /* Return. */ |
| 1215 | int size; /* Size of translate table. */ |
| 1216 | |
| 1217 | validate_region (&start, &end); |
| 1218 | CHECK_STRING (table, 2); |
| 1219 | |
| 1220 | size = XSTRING (table)->size; |
| 1221 | tt = XSTRING (table)->data; |
| 1222 | |
| 1223 | pos = XINT (start); |
| 1224 | stop = XINT (end); |
| 1225 | modify_region (current_buffer, pos, stop); |
| 1226 | |
| 1227 | cnt = 0; |
| 1228 | for (; pos < stop; ++pos) |
| 1229 | { |
| 1230 | oc = FETCH_CHAR (pos); |
| 1231 | if (oc < size) |
| 1232 | { |
| 1233 | nc = tt[oc]; |
| 1234 | if (nc != oc) |
| 1235 | { |
| 1236 | record_change (pos, 1); |
| 1237 | FETCH_CHAR (pos) = nc; |
| 1238 | signal_after_change (pos, 1, 1); |
| 1239 | ++cnt; |
| 1240 | } |
| 1241 | } |
| 1242 | } |
| 1243 | |
| 1244 | XFASTINT (z) = cnt; |
| 1245 | return (z); |
| 1246 | } |
| 1247 | |
| 1248 | DEFUN ("delete-region", Fdelete_region, Sdelete_region, 2, 2, "r", |
| 1249 | "Delete the text between point and mark.\n\ |
| 1250 | When called from a program, expects two arguments,\n\ |
| 1251 | positions (integers or markers) specifying the stretch to be deleted.") |
| 1252 | (b, e) |
| 1253 | Lisp_Object b, e; |
| 1254 | { |
| 1255 | validate_region (&b, &e); |
| 1256 | del_range (XINT (b), XINT (e)); |
| 1257 | return Qnil; |
| 1258 | } |
| 1259 | \f |
| 1260 | DEFUN ("widen", Fwiden, Swiden, 0, 0, "", |
| 1261 | "Remove restrictions (narrowing) from current buffer.\n\ |
| 1262 | This allows the buffer's full text to be seen and edited.") |
| 1263 | () |
| 1264 | { |
| 1265 | BEGV = BEG; |
| 1266 | SET_BUF_ZV (current_buffer, Z); |
| 1267 | clip_changed = 1; |
| 1268 | /* Changing the buffer bounds invalidates any recorded current column. */ |
| 1269 | invalidate_current_column (); |
| 1270 | return Qnil; |
| 1271 | } |
| 1272 | |
| 1273 | DEFUN ("narrow-to-region", Fnarrow_to_region, Snarrow_to_region, 2, 2, "r", |
| 1274 | "Restrict editing in this buffer to the current region.\n\ |
| 1275 | The rest of the text becomes temporarily invisible and untouchable\n\ |
| 1276 | but is not deleted; if you save the buffer in a file, the invisible\n\ |
| 1277 | text is included in the file. \\[widen] makes all visible again.\n\ |
| 1278 | See also `save-restriction'.\n\ |
| 1279 | \n\ |
| 1280 | When calling from a program, pass two arguments; positions (integers\n\ |
| 1281 | or markers) bounding the text that should remain visible.") |
| 1282 | (b, e) |
| 1283 | register Lisp_Object b, e; |
| 1284 | { |
| 1285 | register int i; |
| 1286 | |
| 1287 | CHECK_NUMBER_COERCE_MARKER (b, 0); |
| 1288 | CHECK_NUMBER_COERCE_MARKER (e, 1); |
| 1289 | |
| 1290 | if (XINT (b) > XINT (e)) |
| 1291 | { |
| 1292 | i = XFASTINT (b); |
| 1293 | b = e; |
| 1294 | XFASTINT (e) = i; |
| 1295 | } |
| 1296 | |
| 1297 | if (!(BEG <= XINT (b) && XINT (b) <= XINT (e) && XINT (e) <= Z)) |
| 1298 | args_out_of_range (b, e); |
| 1299 | |
| 1300 | BEGV = XFASTINT (b); |
| 1301 | SET_BUF_ZV (current_buffer, XFASTINT (e)); |
| 1302 | if (point < XFASTINT (b)) |
| 1303 | SET_PT (XFASTINT (b)); |
| 1304 | if (point > XFASTINT (e)) |
| 1305 | SET_PT (XFASTINT (e)); |
| 1306 | clip_changed = 1; |
| 1307 | /* Changing the buffer bounds invalidates any recorded current column. */ |
| 1308 | invalidate_current_column (); |
| 1309 | return Qnil; |
| 1310 | } |
| 1311 | |
| 1312 | Lisp_Object |
| 1313 | save_restriction_save () |
| 1314 | { |
| 1315 | register Lisp_Object bottom, top; |
| 1316 | /* Note: I tried using markers here, but it does not win |
| 1317 | because insertion at the end of the saved region |
| 1318 | does not advance mh and is considered "outside" the saved region. */ |
| 1319 | XFASTINT (bottom) = BEGV - BEG; |
| 1320 | XFASTINT (top) = Z - ZV; |
| 1321 | |
| 1322 | return Fcons (Fcurrent_buffer (), Fcons (bottom, top)); |
| 1323 | } |
| 1324 | |
| 1325 | Lisp_Object |
| 1326 | save_restriction_restore (data) |
| 1327 | Lisp_Object data; |
| 1328 | { |
| 1329 | register struct buffer *buf; |
| 1330 | register int newhead, newtail; |
| 1331 | register Lisp_Object tem; |
| 1332 | |
| 1333 | buf = XBUFFER (XCONS (data)->car); |
| 1334 | |
| 1335 | data = XCONS (data)->cdr; |
| 1336 | |
| 1337 | tem = XCONS (data)->car; |
| 1338 | newhead = XINT (tem); |
| 1339 | tem = XCONS (data)->cdr; |
| 1340 | newtail = XINT (tem); |
| 1341 | if (newhead + newtail > BUF_Z (buf) - BUF_BEG (buf)) |
| 1342 | { |
| 1343 | newhead = 0; |
| 1344 | newtail = 0; |
| 1345 | } |
| 1346 | BUF_BEGV (buf) = BUF_BEG (buf) + newhead; |
| 1347 | SET_BUF_ZV (buf, BUF_Z (buf) - newtail); |
| 1348 | clip_changed = 1; |
| 1349 | |
| 1350 | /* If point is outside the new visible range, move it inside. */ |
| 1351 | SET_BUF_PT (buf, |
| 1352 | clip_to_bounds (BUF_BEGV (buf), BUF_PT (buf), BUF_ZV (buf))); |
| 1353 | |
| 1354 | return Qnil; |
| 1355 | } |
| 1356 | |
| 1357 | DEFUN ("save-restriction", Fsave_restriction, Ssave_restriction, 0, UNEVALLED, 0, |
| 1358 | "Execute BODY, saving and restoring current buffer's restrictions.\n\ |
| 1359 | The buffer's restrictions make parts of the beginning and end invisible.\n\ |
| 1360 | \(They are set up with `narrow-to-region' and eliminated with `widen'.)\n\ |
| 1361 | This special form, `save-restriction', saves the current buffer's restrictions\n\ |
| 1362 | when it is entered, and restores them when it is exited.\n\ |
| 1363 | So any `narrow-to-region' within BODY lasts only until the end of the form.\n\ |
| 1364 | The old restrictions settings are restored\n\ |
| 1365 | even in case of abnormal exit (throw or error).\n\ |
| 1366 | \n\ |
| 1367 | The value returned is the value of the last form in BODY.\n\ |
| 1368 | \n\ |
| 1369 | `save-restriction' can get confused if, within the BODY, you widen\n\ |
| 1370 | and then make changes outside the area within the saved restrictions.\n\ |
| 1371 | \n\ |
| 1372 | Note: if you are using both `save-excursion' and `save-restriction',\n\ |
| 1373 | use `save-excursion' outermost:\n\ |
| 1374 | (save-excursion (save-restriction ...))") |
| 1375 | (body) |
| 1376 | Lisp_Object body; |
| 1377 | { |
| 1378 | register Lisp_Object val; |
| 1379 | int count = specpdl_ptr - specpdl; |
| 1380 | |
| 1381 | record_unwind_protect (save_restriction_restore, save_restriction_save ()); |
| 1382 | val = Fprogn (body); |
| 1383 | return unbind_to (count, val); |
| 1384 | } |
| 1385 | \f |
| 1386 | /* Buffer for the most recent text displayed by Fmessage. */ |
| 1387 | static char *message_text; |
| 1388 | |
| 1389 | /* Allocated length of that buffer. */ |
| 1390 | static int message_length; |
| 1391 | |
| 1392 | DEFUN ("message", Fmessage, Smessage, 1, MANY, 0, |
| 1393 | "Print a one-line message at the bottom of the screen.\n\ |
| 1394 | The first argument is a control string.\n\ |
| 1395 | It may contain %s or %d or %c to print successive following arguments.\n\ |
| 1396 | %s means print an argument as a string, %d means print as number in decimal,\n\ |
| 1397 | %c means print a number as a single character.\n\ |
| 1398 | The argument used by %s must be a string or a symbol;\n\ |
| 1399 | the argument used by %d or %c must be a number.\n\ |
| 1400 | If the first argument is nil, clear any existing message; let the\n\ |
| 1401 | minibuffer contents show.") |
| 1402 | (nargs, args) |
| 1403 | int nargs; |
| 1404 | Lisp_Object *args; |
| 1405 | { |
| 1406 | if (NILP (args[0])) |
| 1407 | { |
| 1408 | message (0); |
| 1409 | return Qnil; |
| 1410 | } |
| 1411 | else |
| 1412 | { |
| 1413 | register Lisp_Object val; |
| 1414 | val = Fformat (nargs, args); |
| 1415 | /* Copy the data so that it won't move when we GC. */ |
| 1416 | if (! message_text) |
| 1417 | { |
| 1418 | message_text = (char *)xmalloc (80); |
| 1419 | message_length = 80; |
| 1420 | } |
| 1421 | if (XSTRING (val)->size > message_length) |
| 1422 | { |
| 1423 | message_length = XSTRING (val)->size; |
| 1424 | message_text = (char *)xrealloc (message_text, message_length); |
| 1425 | } |
| 1426 | bcopy (XSTRING (val)->data, message_text, XSTRING (val)->size); |
| 1427 | message2 (message_text, XSTRING (val)->size); |
| 1428 | return val; |
| 1429 | } |
| 1430 | } |
| 1431 | |
| 1432 | DEFUN ("format", Fformat, Sformat, 1, MANY, 0, |
| 1433 | "Format a string out of a control-string and arguments.\n\ |
| 1434 | The first argument is a control string.\n\ |
| 1435 | The other arguments are substituted into it to make the result, a string.\n\ |
| 1436 | It may contain %-sequences meaning to substitute the next argument.\n\ |
| 1437 | %s means print a string argument. Actually, prints any object, with `princ'.\n\ |
| 1438 | %d means print as number in decimal (%o octal, %x hex).\n\ |
| 1439 | %c means print a number as a single character.\n\ |
| 1440 | %S means print any object as an s-expression (using prin1).\n\ |
| 1441 | The argument used for %d, %o, %x or %c must be a number.\n\ |
| 1442 | Use %% to put a single % into the output.") |
| 1443 | (nargs, args) |
| 1444 | int nargs; |
| 1445 | register Lisp_Object *args; |
| 1446 | { |
| 1447 | register int n; /* The number of the next arg to substitute */ |
| 1448 | register int total = 5; /* An estimate of the final length */ |
| 1449 | char *buf; |
| 1450 | register unsigned char *format, *end; |
| 1451 | int length; |
| 1452 | extern char *index (); |
| 1453 | /* It should not be necessary to GCPRO ARGS, because |
| 1454 | the caller in the interpreter should take care of that. */ |
| 1455 | |
| 1456 | CHECK_STRING (args[0], 0); |
| 1457 | format = XSTRING (args[0])->data; |
| 1458 | end = format + XSTRING (args[0])->size; |
| 1459 | |
| 1460 | n = 0; |
| 1461 | while (format != end) |
| 1462 | if (*format++ == '%') |
| 1463 | { |
| 1464 | int minlen; |
| 1465 | |
| 1466 | /* Process a numeric arg and skip it. */ |
| 1467 | minlen = atoi (format); |
| 1468 | if (minlen > 0) |
| 1469 | total += minlen; |
| 1470 | else |
| 1471 | total -= minlen; |
| 1472 | while ((*format >= '0' && *format <= '9') |
| 1473 | || *format == '-' || *format == ' ' || *format == '.') |
| 1474 | format++; |
| 1475 | |
| 1476 | if (*format == '%') |
| 1477 | format++; |
| 1478 | else if (++n >= nargs) |
| 1479 | error ("not enough arguments for format string"); |
| 1480 | else if (*format == 'S') |
| 1481 | { |
| 1482 | /* For `S', prin1 the argument and then treat like a string. */ |
| 1483 | register Lisp_Object tem; |
| 1484 | tem = Fprin1_to_string (args[n], Qnil); |
| 1485 | args[n] = tem; |
| 1486 | goto string; |
| 1487 | } |
| 1488 | else if (XTYPE (args[n]) == Lisp_Symbol) |
| 1489 | { |
| 1490 | XSET (args[n], Lisp_String, XSYMBOL (args[n])->name); |
| 1491 | goto string; |
| 1492 | } |
| 1493 | else if (XTYPE (args[n]) == Lisp_String) |
| 1494 | { |
| 1495 | string: |
| 1496 | if (*format != 's' && *format != 'S') |
| 1497 | error ("format specifier doesn't match argument type"); |
| 1498 | total += XSTRING (args[n])->size; |
| 1499 | } |
| 1500 | /* Would get MPV otherwise, since Lisp_Int's `point' to low memory. */ |
| 1501 | else if (XTYPE (args[n]) == Lisp_Int && *format != 's') |
| 1502 | { |
| 1503 | #ifdef LISP_FLOAT_TYPE |
| 1504 | /* The following loop assumes the Lisp type indicates |
| 1505 | the proper way to pass the argument. |
| 1506 | So make sure we have a flonum if the argument should |
| 1507 | be a double. */ |
| 1508 | if (*format == 'e' || *format == 'f' || *format == 'g') |
| 1509 | args[n] = Ffloat (args[n]); |
| 1510 | #endif |
| 1511 | total += 10; |
| 1512 | } |
| 1513 | #ifdef LISP_FLOAT_TYPE |
| 1514 | else if (XTYPE (args[n]) == Lisp_Float && *format != 's') |
| 1515 | { |
| 1516 | if (! (*format == 'e' || *format == 'f' || *format == 'g')) |
| 1517 | args[n] = Ftruncate (args[n]); |
| 1518 | total += 20; |
| 1519 | } |
| 1520 | #endif |
| 1521 | else |
| 1522 | { |
| 1523 | /* Anything but a string, convert to a string using princ. */ |
| 1524 | register Lisp_Object tem; |
| 1525 | tem = Fprin1_to_string (args[n], Qt); |
| 1526 | args[n] = tem; |
| 1527 | goto string; |
| 1528 | } |
| 1529 | } |
| 1530 | |
| 1531 | { |
| 1532 | register int nstrings = n + 1; |
| 1533 | |
| 1534 | /* Allocate twice as many strings as we have %-escapes; floats occupy |
| 1535 | two slots, and we're not sure how many of those we have. */ |
| 1536 | register unsigned char **strings |
| 1537 | = (unsigned char **) alloca (2 * nstrings * sizeof (unsigned char *)); |
| 1538 | int i; |
| 1539 | |
| 1540 | i = 0; |
| 1541 | for (n = 0; n < nstrings; n++) |
| 1542 | { |
| 1543 | if (n >= nargs) |
| 1544 | strings[i++] = (unsigned char *) ""; |
| 1545 | else if (XTYPE (args[n]) == Lisp_Int) |
| 1546 | /* We checked above that the corresponding format effector |
| 1547 | isn't %s, which would cause MPV. */ |
| 1548 | strings[i++] = (unsigned char *) XINT (args[n]); |
| 1549 | #ifdef LISP_FLOAT_TYPE |
| 1550 | else if (XTYPE (args[n]) == Lisp_Float) |
| 1551 | { |
| 1552 | union { double d; int half[2]; } u; |
| 1553 | |
| 1554 | u.d = XFLOAT (args[n])->data; |
| 1555 | strings[i++] = (unsigned char *) u.half[0]; |
| 1556 | strings[i++] = (unsigned char *) u.half[1]; |
| 1557 | } |
| 1558 | #endif |
| 1559 | else |
| 1560 | strings[i++] = XSTRING (args[n])->data; |
| 1561 | } |
| 1562 | |
| 1563 | /* Format it in bigger and bigger buf's until it all fits. */ |
| 1564 | while (1) |
| 1565 | { |
| 1566 | buf = (char *) alloca (total + 1); |
| 1567 | buf[total - 1] = 0; |
| 1568 | |
| 1569 | length = doprnt (buf, total + 1, strings[0], end, i-1, strings + 1); |
| 1570 | if (buf[total - 1] == 0) |
| 1571 | break; |
| 1572 | |
| 1573 | total *= 2; |
| 1574 | } |
| 1575 | } |
| 1576 | |
| 1577 | /* UNGCPRO; */ |
| 1578 | return make_string (buf, length); |
| 1579 | } |
| 1580 | |
| 1581 | /* VARARGS 1 */ |
| 1582 | Lisp_Object |
| 1583 | #ifdef NO_ARG_ARRAY |
| 1584 | format1 (string1, arg0, arg1, arg2, arg3, arg4) |
| 1585 | int arg0, arg1, arg2, arg3, arg4; |
| 1586 | #else |
| 1587 | format1 (string1) |
| 1588 | #endif |
| 1589 | char *string1; |
| 1590 | { |
| 1591 | char buf[100]; |
| 1592 | #ifdef NO_ARG_ARRAY |
| 1593 | int args[5]; |
| 1594 | args[0] = arg0; |
| 1595 | args[1] = arg1; |
| 1596 | args[2] = arg2; |
| 1597 | args[3] = arg3; |
| 1598 | args[4] = arg4; |
| 1599 | doprnt (buf, sizeof buf, string1, 0, 5, args); |
| 1600 | #else |
| 1601 | doprnt (buf, sizeof buf, string1, 0, 5, &string1 + 1); |
| 1602 | #endif |
| 1603 | return build_string (buf); |
| 1604 | } |
| 1605 | \f |
| 1606 | DEFUN ("char-equal", Fchar_equal, Schar_equal, 2, 2, 0, |
| 1607 | "Return t if two characters match, optionally ignoring case.\n\ |
| 1608 | Both arguments must be characters (i.e. integers).\n\ |
| 1609 | Case is ignored if `case-fold-search' is non-nil in the current buffer.") |
| 1610 | (c1, c2) |
| 1611 | register Lisp_Object c1, c2; |
| 1612 | { |
| 1613 | unsigned char *downcase = DOWNCASE_TABLE; |
| 1614 | CHECK_NUMBER (c1, 0); |
| 1615 | CHECK_NUMBER (c2, 1); |
| 1616 | |
| 1617 | if (!NILP (current_buffer->case_fold_search) |
| 1618 | ? (downcase[0xff & XFASTINT (c1)] == downcase[0xff & XFASTINT (c2)] |
| 1619 | && (XFASTINT (c1) & ~0xff) == (XFASTINT (c2) & ~0xff)) |
| 1620 | : XINT (c1) == XINT (c2)) |
| 1621 | return Qt; |
| 1622 | return Qnil; |
| 1623 | } |
| 1624 | \f |
| 1625 | /* Transpose the markers in two regions of the current buffer, and |
| 1626 | adjust the ones between them if necessary (i.e.: if the regions |
| 1627 | differ in size). |
| 1628 | |
| 1629 | Traverses the entire marker list of the buffer to do so, adding an |
| 1630 | appropriate amount to some, subtracting from some, and leaving the |
| 1631 | rest untouched. Most of this is copied from adjust_markers in insdel.c. |
| 1632 | |
| 1633 | It's the caller's job to see that (start1 <= end1 <= start2 <= end2). */ |
| 1634 | |
| 1635 | void |
| 1636 | transpose_markers (start1, end1, start2, end2) |
| 1637 | register int start1, end1, start2, end2; |
| 1638 | { |
| 1639 | register int amt1, amt2, diff, mpos; |
| 1640 | register Lisp_Object marker; |
| 1641 | |
| 1642 | /* Update point as if it were a marker. */ |
| 1643 | if (PT < start1) |
| 1644 | ; |
| 1645 | else if (PT < end1) |
| 1646 | TEMP_SET_PT (PT + (end2 - end1)); |
| 1647 | else if (PT < start2) |
| 1648 | TEMP_SET_PT (PT + (end2 - start2) - (end1 - start1)); |
| 1649 | else if (PT < end2) |
| 1650 | TEMP_SET_PT (PT - (start2 - start1)); |
| 1651 | |
| 1652 | /* We used to adjust the endpoints here to account for the gap, but that |
| 1653 | isn't good enough. Even if we assume the caller has tried to move the |
| 1654 | gap out of our way, it might still be at start1 exactly, for example; |
| 1655 | and that places it `inside' the interval, for our purposes. The amount |
| 1656 | of adjustment is nontrivial if there's a `denormalized' marker whose |
| 1657 | position is between GPT and GPT + GAP_SIZE, so it's simpler to leave |
| 1658 | the dirty work to Fmarker_position, below. */ |
| 1659 | |
| 1660 | /* The difference between the region's lengths */ |
| 1661 | diff = (end2 - start2) - (end1 - start1); |
| 1662 | |
| 1663 | /* For shifting each marker in a region by the length of the other |
| 1664 | * region plus the distance between the regions. |
| 1665 | */ |
| 1666 | amt1 = (end2 - start2) + (start2 - end1); |
| 1667 | amt2 = (end1 - start1) + (start2 - end1); |
| 1668 | |
| 1669 | for (marker = current_buffer->markers; !NILP (marker); |
| 1670 | marker = XMARKER (marker)->chain) |
| 1671 | { |
| 1672 | mpos = Fmarker_position (marker); |
| 1673 | if (mpos >= start1 && mpos < end2) |
| 1674 | { |
| 1675 | if (mpos < end1) |
| 1676 | mpos += amt1; |
| 1677 | else if (mpos < start2) |
| 1678 | mpos += diff; |
| 1679 | else |
| 1680 | mpos -= amt2; |
| 1681 | if (mpos > GPT) mpos += GAP_SIZE; |
| 1682 | XMARKER (marker)->bufpos = mpos; |
| 1683 | } |
| 1684 | } |
| 1685 | } |
| 1686 | |
| 1687 | DEFUN ("transpose-regions", Ftranspose_regions, Stranspose_regions, 4, 5, 0, |
| 1688 | "Transpose region START1 to END1 with START2 to END2.\n\ |
| 1689 | The regions may not be overlapping, because the size of the buffer is\n\ |
| 1690 | never changed in a transposition.\n\ |
| 1691 | \n\ |
| 1692 | Optional fifth arg LEAVE_MARKERS, if non-nil, means don't transpose\n\ |
| 1693 | any markers that happen to be located in the regions.\n\ |
| 1694 | \n\ |
| 1695 | Transposing beyond buffer boundaries is an error.") |
| 1696 | (startr1, endr1, startr2, endr2, leave_markers) |
| 1697 | Lisp_Object startr1, endr1, startr2, endr2, leave_markers; |
| 1698 | { |
| 1699 | register int start1, end1, start2, end2, |
| 1700 | gap, len1, len_mid, len2; |
| 1701 | unsigned char *start1_addr, *start2_addr, *temp; |
| 1702 | |
| 1703 | #ifdef USE_TEXT_PROPERTIES |
| 1704 | INTERVAL cur_intv, tmp_interval1, tmp_interval_mid, tmp_interval2; |
| 1705 | cur_intv = current_buffer->intervals; |
| 1706 | #endif /* USE_TEXT_PROPERTIES */ |
| 1707 | |
| 1708 | validate_region (&startr1, &endr1); |
| 1709 | validate_region (&startr2, &endr2); |
| 1710 | |
| 1711 | start1 = XFASTINT (startr1); |
| 1712 | end1 = XFASTINT (endr1); |
| 1713 | start2 = XFASTINT (startr2); |
| 1714 | end2 = XFASTINT (endr2); |
| 1715 | gap = GPT; |
| 1716 | |
| 1717 | /* Swap the regions if they're reversed. */ |
| 1718 | if (start2 < end1) |
| 1719 | { |
| 1720 | register int glumph = start1; |
| 1721 | start1 = start2; |
| 1722 | start2 = glumph; |
| 1723 | glumph = end1; |
| 1724 | end1 = end2; |
| 1725 | end2 = glumph; |
| 1726 | } |
| 1727 | |
| 1728 | len1 = end1 - start1; |
| 1729 | len2 = end2 - start2; |
| 1730 | |
| 1731 | if (start2 < end1) |
| 1732 | error ("transposed regions not properly ordered"); |
| 1733 | else if (start1 == end1 || start2 == end2) |
| 1734 | error ("transposed region may not be of length 0"); |
| 1735 | |
| 1736 | /* The possibilities are: |
| 1737 | 1. Adjacent (contiguous) regions, or separate but equal regions |
| 1738 | (no, really equal, in this case!), or |
| 1739 | 2. Separate regions of unequal size. |
| 1740 | |
| 1741 | The worst case is usually No. 2. It means that (aside from |
| 1742 | potential need for getting the gap out of the way), there also |
| 1743 | needs to be a shifting of the text between the two regions. So |
| 1744 | if they are spread far apart, we are that much slower... sigh. */ |
| 1745 | |
| 1746 | /* It must be pointed out that the really studly thing to do would |
| 1747 | be not to move the gap at all, but to leave it in place and work |
| 1748 | around it if necessary. This would be extremely efficient, |
| 1749 | especially considering that people are likely to do |
| 1750 | transpositions near where they are working interactively, which |
| 1751 | is exactly where the gap would be found. However, such code |
| 1752 | would be much harder to write and to read. So, if you are |
| 1753 | reading this comment and are feeling squirrely, by all means have |
| 1754 | a go! I just didn't feel like doing it, so I will simply move |
| 1755 | the gap the minimum distance to get it out of the way, and then |
| 1756 | deal with an unbroken array. */ |
| 1757 | |
| 1758 | /* Make sure the gap won't interfere, by moving it out of the text |
| 1759 | we will operate on. */ |
| 1760 | if (start1 < gap && gap < end2) |
| 1761 | { |
| 1762 | if (gap - start1 < end2 - gap) |
| 1763 | move_gap (start1); |
| 1764 | else |
| 1765 | move_gap (end2); |
| 1766 | } |
| 1767 | |
| 1768 | /* Hmmm... how about checking to see if the gap is large |
| 1769 | enough to use as the temporary storage? That would avoid an |
| 1770 | allocation... interesting. Later, don't fool with it now. */ |
| 1771 | |
| 1772 | /* Working without memmove, for portability (sigh), so must be |
| 1773 | careful of overlapping subsections of the array... */ |
| 1774 | |
| 1775 | if (end1 == start2) /* adjacent regions */ |
| 1776 | { |
| 1777 | modify_region (current_buffer, start1, end2); |
| 1778 | record_change (start1, len1 + len2); |
| 1779 | |
| 1780 | #ifdef USE_TEXT_PROPERTIES |
| 1781 | tmp_interval1 = copy_intervals (cur_intv, start1, len1); |
| 1782 | tmp_interval2 = copy_intervals (cur_intv, start2, len2); |
| 1783 | Fset_text_properties (start1, end2, Qnil, Qnil); |
| 1784 | #endif /* USE_TEXT_PROPERTIES */ |
| 1785 | |
| 1786 | /* First region smaller than second. */ |
| 1787 | if (len1 < len2) |
| 1788 | { |
| 1789 | /* We use alloca only if it is small, |
| 1790 | because we want to avoid stack overflow. */ |
| 1791 | if (len2 > 20000) |
| 1792 | temp = (unsigned char *) xmalloc (len2); |
| 1793 | else |
| 1794 | temp = (unsigned char *) alloca (len2); |
| 1795 | |
| 1796 | /* Don't precompute these addresses. We have to compute them |
| 1797 | at the last minute, because the relocating allocator might |
| 1798 | have moved the buffer around during the xmalloc. */ |
| 1799 | start1_addr = BUF_CHAR_ADDRESS (current_buffer, start1); |
| 1800 | start2_addr = BUF_CHAR_ADDRESS (current_buffer, start2); |
| 1801 | |
| 1802 | bcopy (start2_addr, temp, len2); |
| 1803 | bcopy (start1_addr, start1_addr + len2, len1); |
| 1804 | bcopy (temp, start1_addr, len2); |
| 1805 | if (len2 > 20000) |
| 1806 | free (temp); |
| 1807 | } |
| 1808 | else |
| 1809 | /* First region not smaller than second. */ |
| 1810 | { |
| 1811 | if (len1 > 20000) |
| 1812 | temp = (unsigned char *) xmalloc (len1); |
| 1813 | else |
| 1814 | temp = (unsigned char *) alloca (len1); |
| 1815 | start1_addr = BUF_CHAR_ADDRESS (current_buffer, start1); |
| 1816 | start2_addr = BUF_CHAR_ADDRESS (current_buffer, start2); |
| 1817 | bcopy (start1_addr, temp, len1); |
| 1818 | bcopy (start2_addr, start1_addr, len2); |
| 1819 | bcopy (temp, start1_addr + len2, len1); |
| 1820 | if (len1 > 20000) |
| 1821 | free (temp); |
| 1822 | } |
| 1823 | #ifdef USE_TEXT_PROPERTIES |
| 1824 | graft_intervals_into_buffer (tmp_interval1, start1 + len2, |
| 1825 | len1, current_buffer, 0); |
| 1826 | graft_intervals_into_buffer (tmp_interval2, start1, |
| 1827 | len2, current_buffer, 0); |
| 1828 | #endif /* USE_TEXT_PROPERTIES */ |
| 1829 | } |
| 1830 | /* Non-adjacent regions, because end1 != start2, bleagh... */ |
| 1831 | else |
| 1832 | { |
| 1833 | if (len1 == len2) |
| 1834 | /* Regions are same size, though, how nice. */ |
| 1835 | { |
| 1836 | modify_region (current_buffer, start1, end1); |
| 1837 | modify_region (current_buffer, start2, end2); |
| 1838 | record_change (start1, len1); |
| 1839 | record_change (start2, len2); |
| 1840 | #ifdef USE_TEXT_PROPERTIES |
| 1841 | tmp_interval1 = copy_intervals (cur_intv, start1, len1); |
| 1842 | tmp_interval2 = copy_intervals (cur_intv, start2, len2); |
| 1843 | Fset_text_properties (start1, end1, Qnil, Qnil); |
| 1844 | Fset_text_properties (start2, end2, Qnil, Qnil); |
| 1845 | #endif /* USE_TEXT_PROPERTIES */ |
| 1846 | |
| 1847 | if (len1 > 20000) |
| 1848 | temp = (unsigned char *) xmalloc (len1); |
| 1849 | else |
| 1850 | temp = (unsigned char *) alloca (len1); |
| 1851 | start1_addr = BUF_CHAR_ADDRESS (current_buffer, start1); |
| 1852 | start2_addr = BUF_CHAR_ADDRESS (current_buffer, start2); |
| 1853 | bcopy (start1_addr, temp, len1); |
| 1854 | bcopy (start2_addr, start1_addr, len2); |
| 1855 | bcopy (temp, start2_addr, len1); |
| 1856 | if (len1 > 20000) |
| 1857 | free (temp); |
| 1858 | #ifdef USE_TEXT_PROPERTIES |
| 1859 | graft_intervals_into_buffer (tmp_interval1, start2, |
| 1860 | len1, current_buffer, 0); |
| 1861 | graft_intervals_into_buffer (tmp_interval2, start1, |
| 1862 | len2, current_buffer, 0); |
| 1863 | #endif /* USE_TEXT_PROPERTIES */ |
| 1864 | } |
| 1865 | |
| 1866 | else if (len1 < len2) /* Second region larger than first */ |
| 1867 | /* Non-adjacent & unequal size, area between must also be shifted. */ |
| 1868 | { |
| 1869 | len_mid = start2 - end1; |
| 1870 | modify_region (current_buffer, start1, end2); |
| 1871 | record_change (start1, (end2 - start1)); |
| 1872 | #ifdef USE_TEXT_PROPERTIES |
| 1873 | tmp_interval1 = copy_intervals (cur_intv, start1, len1); |
| 1874 | tmp_interval_mid = copy_intervals (cur_intv, end1, len_mid); |
| 1875 | tmp_interval2 = copy_intervals (cur_intv, start2, len2); |
| 1876 | Fset_text_properties (start1, end2, Qnil, Qnil); |
| 1877 | #endif /* USE_TEXT_PROPERTIES */ |
| 1878 | |
| 1879 | /* holds region 2 */ |
| 1880 | if (len2 > 20000) |
| 1881 | temp = (unsigned char *) xmalloc (len2); |
| 1882 | else |
| 1883 | temp = (unsigned char *) alloca (len2); |
| 1884 | start1_addr = BUF_CHAR_ADDRESS (current_buffer, start1); |
| 1885 | start2_addr = BUF_CHAR_ADDRESS (current_buffer, start2); |
| 1886 | bcopy (start2_addr, temp, len2); |
| 1887 | bcopy (start1_addr, start1_addr + len_mid + len2, len1); |
| 1888 | safe_bcopy (start1_addr + len1, start1_addr + len2, len_mid); |
| 1889 | bcopy (temp, start1_addr, len2); |
| 1890 | if (len2 > 20000) |
| 1891 | free (temp); |
| 1892 | #ifdef USE_TEXT_PROPERTIES |
| 1893 | graft_intervals_into_buffer (tmp_interval1, end2 - len1, |
| 1894 | len1, current_buffer, 0); |
| 1895 | graft_intervals_into_buffer (tmp_interval_mid, start1 + len2, |
| 1896 | len_mid, current_buffer, 0); |
| 1897 | graft_intervals_into_buffer (tmp_interval2, start1, |
| 1898 | len2, current_buffer, 0); |
| 1899 | #endif /* USE_TEXT_PROPERTIES */ |
| 1900 | } |
| 1901 | else |
| 1902 | /* Second region smaller than first. */ |
| 1903 | { |
| 1904 | len_mid = start2 - end1; |
| 1905 | record_change (start1, (end2 - start1)); |
| 1906 | modify_region (current_buffer, start1, end2); |
| 1907 | |
| 1908 | #ifdef USE_TEXT_PROPERTIES |
| 1909 | tmp_interval1 = copy_intervals (cur_intv, start1, len1); |
| 1910 | tmp_interval_mid = copy_intervals (cur_intv, end1, len_mid); |
| 1911 | tmp_interval2 = copy_intervals (cur_intv, start2, len2); |
| 1912 | Fset_text_properties (start1, end2, Qnil, Qnil); |
| 1913 | #endif /* USE_TEXT_PROPERTIES */ |
| 1914 | |
| 1915 | /* holds region 1 */ |
| 1916 | if (len1 > 20000) |
| 1917 | temp = (unsigned char *) xmalloc (len1); |
| 1918 | else |
| 1919 | temp = (unsigned char *) alloca (len1); |
| 1920 | start1_addr = BUF_CHAR_ADDRESS (current_buffer, start1); |
| 1921 | start2_addr = BUF_CHAR_ADDRESS (current_buffer, start2); |
| 1922 | bcopy (start1_addr, temp, len1); |
| 1923 | bcopy (start2_addr, start1_addr, len2); |
| 1924 | bcopy (start1_addr + len1, start1_addr + len2, len_mid); |
| 1925 | bcopy (temp, start1_addr + len2 + len_mid, len1); |
| 1926 | if (len1 > 20000) |
| 1927 | free (temp); |
| 1928 | #ifdef USE_TEXT_PROPERTIES |
| 1929 | graft_intervals_into_buffer (tmp_interval1, end2 - len1, |
| 1930 | len1, current_buffer, 0); |
| 1931 | graft_intervals_into_buffer (tmp_interval_mid, start1 + len2, |
| 1932 | len_mid, current_buffer, 0); |
| 1933 | graft_intervals_into_buffer (tmp_interval2, start1, |
| 1934 | len2, current_buffer, 0); |
| 1935 | #endif /* USE_TEXT_PROPERTIES */ |
| 1936 | } |
| 1937 | } |
| 1938 | |
| 1939 | /* todo: this will be slow, because for every transposition, we |
| 1940 | traverse the whole friggin marker list. Possible solutions: |
| 1941 | somehow get a list of *all* the markers across multiple |
| 1942 | transpositions and do it all in one swell phoop. Or maybe modify |
| 1943 | Emacs' marker code to keep an ordered list or tree. This might |
| 1944 | be nicer, and more beneficial in the long run, but would be a |
| 1945 | bunch of work. Plus the way they're arranged now is nice. */ |
| 1946 | if (NILP (leave_markers)) |
| 1947 | { |
| 1948 | transpose_markers (start1, end1, start2, end2); |
| 1949 | fix_overlays_in_range (start1, end2); |
| 1950 | } |
| 1951 | |
| 1952 | return Qnil; |
| 1953 | } |
| 1954 | |
| 1955 | \f |
| 1956 | void |
| 1957 | syms_of_editfns () |
| 1958 | { |
| 1959 | DEFVAR_LISP ("system-name", &Vsystem_name, |
| 1960 | "The name of the machine Emacs is running on."); |
| 1961 | |
| 1962 | DEFVAR_LISP ("user-full-name", &Vuser_full_name, |
| 1963 | "The full name of the user logged in."); |
| 1964 | |
| 1965 | DEFVAR_LISP ("user-name", &Vuser_name, |
| 1966 | "The user's name, taken from environment variables if possible."); |
| 1967 | |
| 1968 | DEFVAR_LISP ("user-real-name", &Vuser_real_name, |
| 1969 | "The user's name, based upon the real uid only."); |
| 1970 | |
| 1971 | defsubr (&Schar_equal); |
| 1972 | defsubr (&Sgoto_char); |
| 1973 | defsubr (&Sstring_to_char); |
| 1974 | defsubr (&Schar_to_string); |
| 1975 | defsubr (&Sbuffer_substring); |
| 1976 | defsubr (&Sbuffer_string); |
| 1977 | |
| 1978 | defsubr (&Spoint_marker); |
| 1979 | defsubr (&Smark_marker); |
| 1980 | defsubr (&Spoint); |
| 1981 | defsubr (&Sregion_beginning); |
| 1982 | defsubr (&Sregion_end); |
| 1983 | /* defsubr (&Smark); */ |
| 1984 | /* defsubr (&Sset_mark); */ |
| 1985 | defsubr (&Ssave_excursion); |
| 1986 | |
| 1987 | defsubr (&Sbufsize); |
| 1988 | defsubr (&Spoint_max); |
| 1989 | defsubr (&Spoint_min); |
| 1990 | defsubr (&Spoint_min_marker); |
| 1991 | defsubr (&Spoint_max_marker); |
| 1992 | |
| 1993 | defsubr (&Sbobp); |
| 1994 | defsubr (&Seobp); |
| 1995 | defsubr (&Sbolp); |
| 1996 | defsubr (&Seolp); |
| 1997 | defsubr (&Sfollowing_char); |
| 1998 | defsubr (&Sprevious_char); |
| 1999 | defsubr (&Schar_after); |
| 2000 | defsubr (&Sinsert); |
| 2001 | defsubr (&Sinsert_before_markers); |
| 2002 | defsubr (&Sinsert_and_inherit); |
| 2003 | defsubr (&Sinsert_and_inherit_before_markers); |
| 2004 | defsubr (&Sinsert_char); |
| 2005 | |
| 2006 | defsubr (&Suser_login_name); |
| 2007 | defsubr (&Suser_real_login_name); |
| 2008 | defsubr (&Suser_uid); |
| 2009 | defsubr (&Suser_real_uid); |
| 2010 | defsubr (&Suser_full_name); |
| 2011 | defsubr (&Semacs_pid); |
| 2012 | defsubr (&Scurrent_time); |
| 2013 | defsubr (&Scurrent_time_string); |
| 2014 | defsubr (&Scurrent_time_zone); |
| 2015 | defsubr (&Ssystem_name); |
| 2016 | defsubr (&Smessage); |
| 2017 | defsubr (&Sformat); |
| 2018 | |
| 2019 | defsubr (&Sinsert_buffer_substring); |
| 2020 | defsubr (&Scompare_buffer_substrings); |
| 2021 | defsubr (&Ssubst_char_in_region); |
| 2022 | defsubr (&Stranslate_region); |
| 2023 | defsubr (&Sdelete_region); |
| 2024 | defsubr (&Swiden); |
| 2025 | defsubr (&Snarrow_to_region); |
| 2026 | defsubr (&Ssave_restriction); |
| 2027 | defsubr (&Stranspose_regions); |
| 2028 | } |