| 1 | /* Lisp parsing and input streams. |
| 2 | Copyright (C) 1985, 1986, 1987, 1988, 1989, |
| 3 | 1993, 1994, 1995 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 | |
| 23 | #include <config.h> |
| 24 | #include <stdio.h> |
| 25 | #include <sys/types.h> |
| 26 | #include <sys/stat.h> |
| 27 | #include <sys/file.h> |
| 28 | #include <errno.h> |
| 29 | #include "lisp.h" |
| 30 | |
| 31 | #ifndef standalone |
| 32 | #include "buffer.h" |
| 33 | #include <paths.h> |
| 34 | #include "commands.h" |
| 35 | #include "keyboard.h" |
| 36 | #include "termhooks.h" |
| 37 | #endif |
| 38 | |
| 39 | #ifdef lint |
| 40 | #include <sys/inode.h> |
| 41 | #endif /* lint */ |
| 42 | |
| 43 | #ifdef MSDOS |
| 44 | #if __DJGPP__ < 2 |
| 45 | #include <unistd.h> /* to get X_OK */ |
| 46 | #endif |
| 47 | #include "msdos.h" |
| 48 | #endif |
| 49 | |
| 50 | #ifndef X_OK |
| 51 | #define X_OK 01 |
| 52 | #endif |
| 53 | |
| 54 | #ifdef LISP_FLOAT_TYPE |
| 55 | #ifdef STDC_HEADERS |
| 56 | #include <stdlib.h> |
| 57 | #endif |
| 58 | |
| 59 | #include <math.h> |
| 60 | #endif /* LISP_FLOAT_TYPE */ |
| 61 | |
| 62 | #ifdef HAVE_SETLOCALE |
| 63 | #include <locale.h> |
| 64 | #endif /* HAVE_SETLOCALE */ |
| 65 | |
| 66 | #ifndef O_RDONLY |
| 67 | #define O_RDONLY 0 |
| 68 | #endif |
| 69 | |
| 70 | extern int errno; |
| 71 | |
| 72 | Lisp_Object Qread_char, Qget_file_char, Qstandard_input, Qcurrent_load_list; |
| 73 | Lisp_Object Qvariable_documentation, Vvalues, Vstandard_input, Vafter_load_alist; |
| 74 | Lisp_Object Qascii_character, Qload, Qload_file_name; |
| 75 | Lisp_Object Qbackquote, Qcomma, Qcomma_at, Qcomma_dot, Qfunction; |
| 76 | |
| 77 | extern Lisp_Object Qevent_symbol_element_mask; |
| 78 | |
| 79 | /* non-zero if inside `load' */ |
| 80 | int load_in_progress; |
| 81 | |
| 82 | /* Directory in which the sources were found. */ |
| 83 | Lisp_Object Vsource_directory; |
| 84 | |
| 85 | /* Search path for files to be loaded. */ |
| 86 | Lisp_Object Vload_path; |
| 87 | |
| 88 | /* This is the user-visible association list that maps features to |
| 89 | lists of defs in their load files. */ |
| 90 | Lisp_Object Vload_history; |
| 91 | |
| 92 | /* This is used to build the load history. */ |
| 93 | Lisp_Object Vcurrent_load_list; |
| 94 | |
| 95 | /* Name of file actually being read by `load'. */ |
| 96 | Lisp_Object Vload_file_name; |
| 97 | |
| 98 | /* Function to use for reading, in `load' and friends. */ |
| 99 | Lisp_Object Vload_read_function; |
| 100 | |
| 101 | /* Nonzero means load should forcibly load all dynamic doc strings. */ |
| 102 | static int load_force_doc_strings; |
| 103 | |
| 104 | /* List of descriptors now open for Fload. */ |
| 105 | static Lisp_Object load_descriptor_list; |
| 106 | |
| 107 | /* File for get_file_char to read from. Use by load. */ |
| 108 | static FILE *instream; |
| 109 | |
| 110 | /* When nonzero, read conses in pure space */ |
| 111 | static int read_pure; |
| 112 | |
| 113 | /* For use within read-from-string (this reader is non-reentrant!!) */ |
| 114 | static int read_from_string_index; |
| 115 | static int read_from_string_limit; |
| 116 | |
| 117 | /* This contains the last string skipped with #@. */ |
| 118 | static char *saved_doc_string; |
| 119 | /* Length of buffer allocated in saved_doc_string. */ |
| 120 | static int saved_doc_string_size; |
| 121 | /* Length of actual data in saved_doc_string. */ |
| 122 | static int saved_doc_string_length; |
| 123 | /* This is the file position that string came from. */ |
| 124 | static int saved_doc_string_position; |
| 125 | |
| 126 | /* Nonzero means inside a new-style backquote |
| 127 | with no surrounding parentheses. |
| 128 | Fread initializes this to zero, so we need not specbind it |
| 129 | or worry about what happens to it when there is an error. */ |
| 130 | static int new_backquote_flag; |
| 131 | \f |
| 132 | /* Handle unreading and rereading of characters. |
| 133 | Write READCHAR to read a character, |
| 134 | UNREAD(c) to unread c to be read again. */ |
| 135 | |
| 136 | #define READCHAR readchar (readcharfun) |
| 137 | #define UNREAD(c) unreadchar (readcharfun, c) |
| 138 | |
| 139 | static int |
| 140 | readchar (readcharfun) |
| 141 | Lisp_Object readcharfun; |
| 142 | { |
| 143 | Lisp_Object tem; |
| 144 | register struct buffer *inbuffer; |
| 145 | register int c, mpos; |
| 146 | |
| 147 | if (BUFFERP (readcharfun)) |
| 148 | { |
| 149 | inbuffer = XBUFFER (readcharfun); |
| 150 | |
| 151 | if (BUF_PT (inbuffer) >= BUF_ZV (inbuffer)) |
| 152 | return -1; |
| 153 | c = *(unsigned char *) BUF_CHAR_ADDRESS (inbuffer, BUF_PT (inbuffer)); |
| 154 | SET_BUF_PT (inbuffer, BUF_PT (inbuffer) + 1); |
| 155 | |
| 156 | return c; |
| 157 | } |
| 158 | if (MARKERP (readcharfun)) |
| 159 | { |
| 160 | inbuffer = XMARKER (readcharfun)->buffer; |
| 161 | |
| 162 | mpos = marker_position (readcharfun); |
| 163 | |
| 164 | if (mpos > BUF_ZV (inbuffer) - 1) |
| 165 | return -1; |
| 166 | c = *(unsigned char *) BUF_CHAR_ADDRESS (inbuffer, mpos); |
| 167 | if (mpos != BUF_GPT (inbuffer)) |
| 168 | XMARKER (readcharfun)->bufpos++; |
| 169 | else |
| 170 | Fset_marker (readcharfun, make_number (mpos + 1), |
| 171 | Fmarker_buffer (readcharfun)); |
| 172 | return c; |
| 173 | } |
| 174 | if (EQ (readcharfun, Qget_file_char)) |
| 175 | { |
| 176 | c = getc (instream); |
| 177 | #ifdef EINTR |
| 178 | /* Interrupted reads have been observed while reading over the network */ |
| 179 | while (c == EOF && ferror (instream) && errno == EINTR) |
| 180 | { |
| 181 | clearerr (instream); |
| 182 | c = getc (instream); |
| 183 | } |
| 184 | #endif |
| 185 | return c; |
| 186 | } |
| 187 | |
| 188 | if (STRINGP (readcharfun)) |
| 189 | { |
| 190 | register int c; |
| 191 | /* This used to be return of a conditional expression, |
| 192 | but that truncated -1 to a char on VMS. */ |
| 193 | if (read_from_string_index < read_from_string_limit) |
| 194 | c = XSTRING (readcharfun)->data[read_from_string_index++]; |
| 195 | else |
| 196 | c = -1; |
| 197 | return c; |
| 198 | } |
| 199 | |
| 200 | tem = call0 (readcharfun); |
| 201 | |
| 202 | if (NILP (tem)) |
| 203 | return -1; |
| 204 | return XINT (tem); |
| 205 | } |
| 206 | |
| 207 | /* Unread the character C in the way appropriate for the stream READCHARFUN. |
| 208 | If the stream is a user function, call it with the char as argument. */ |
| 209 | |
| 210 | static void |
| 211 | unreadchar (readcharfun, c) |
| 212 | Lisp_Object readcharfun; |
| 213 | int c; |
| 214 | { |
| 215 | if (c == -1) |
| 216 | /* Don't back up the pointer if we're unreading the end-of-input mark, |
| 217 | since readchar didn't advance it when we read it. */ |
| 218 | ; |
| 219 | else if (BUFFERP (readcharfun)) |
| 220 | { |
| 221 | if (XBUFFER (readcharfun) == current_buffer) |
| 222 | SET_PT (point - 1); |
| 223 | else |
| 224 | SET_BUF_PT (XBUFFER (readcharfun), BUF_PT (XBUFFER (readcharfun)) - 1); |
| 225 | } |
| 226 | else if (MARKERP (readcharfun)) |
| 227 | XMARKER (readcharfun)->bufpos--; |
| 228 | else if (STRINGP (readcharfun)) |
| 229 | read_from_string_index--; |
| 230 | else if (EQ (readcharfun, Qget_file_char)) |
| 231 | ungetc (c, instream); |
| 232 | else |
| 233 | call1 (readcharfun, make_number (c)); |
| 234 | } |
| 235 | |
| 236 | static Lisp_Object read0 (), read1 (), read_list (), read_vector (); |
| 237 | \f |
| 238 | /* get a character from the tty */ |
| 239 | |
| 240 | extern Lisp_Object read_char (); |
| 241 | |
| 242 | /* Read input events until we get one that's acceptable for our purposes. |
| 243 | |
| 244 | If NO_SWITCH_FRAME is non-zero, switch-frame events are stashed |
| 245 | until we get a character we like, and then stuffed into |
| 246 | unread_switch_frame. |
| 247 | |
| 248 | If ASCII_REQUIRED is non-zero, we check function key events to see |
| 249 | if the unmodified version of the symbol has a Qascii_character |
| 250 | property, and use that character, if present. |
| 251 | |
| 252 | If ERROR_NONASCII is non-zero, we signal an error if the input we |
| 253 | get isn't an ASCII character with modifiers. If it's zero but |
| 254 | ASCII_REQUIRED is non-zero, we just re-read until we get an ASCII |
| 255 | character. */ |
| 256 | |
| 257 | Lisp_Object |
| 258 | read_filtered_event (no_switch_frame, ascii_required, error_nonascii) |
| 259 | int no_switch_frame, ascii_required, error_nonascii; |
| 260 | { |
| 261 | #ifdef standalone |
| 262 | return make_number (getchar ()); |
| 263 | #else |
| 264 | register Lisp_Object val, delayed_switch_frame; |
| 265 | |
| 266 | delayed_switch_frame = Qnil; |
| 267 | |
| 268 | /* Read until we get an acceptable event. */ |
| 269 | retry: |
| 270 | val = read_char (0, 0, 0, Qnil, 0); |
| 271 | |
| 272 | if (BUFFERP (val)) |
| 273 | goto retry; |
| 274 | |
| 275 | /* switch-frame events are put off until after the next ASCII |
| 276 | character. This is better than signaling an error just because |
| 277 | the last characters were typed to a separate minibuffer frame, |
| 278 | for example. Eventually, some code which can deal with |
| 279 | switch-frame events will read it and process it. */ |
| 280 | if (no_switch_frame |
| 281 | && EVENT_HAS_PARAMETERS (val) |
| 282 | && EQ (EVENT_HEAD (val), Qswitch_frame)) |
| 283 | { |
| 284 | delayed_switch_frame = val; |
| 285 | goto retry; |
| 286 | } |
| 287 | |
| 288 | if (ascii_required) |
| 289 | { |
| 290 | /* Convert certain symbols to their ASCII equivalents. */ |
| 291 | if (SYMBOLP (val)) |
| 292 | { |
| 293 | Lisp_Object tem, tem1, tem2; |
| 294 | tem = Fget (val, Qevent_symbol_element_mask); |
| 295 | if (!NILP (tem)) |
| 296 | { |
| 297 | tem1 = Fget (Fcar (tem), Qascii_character); |
| 298 | /* Merge this symbol's modifier bits |
| 299 | with the ASCII equivalent of its basic code. */ |
| 300 | if (!NILP (tem1)) |
| 301 | XSETFASTINT (val, XINT (tem1) | XINT (Fcar (Fcdr (tem)))); |
| 302 | } |
| 303 | } |
| 304 | |
| 305 | /* If we don't have a character now, deal with it appropriately. */ |
| 306 | if (!INTEGERP (val)) |
| 307 | { |
| 308 | if (error_nonascii) |
| 309 | { |
| 310 | Vunread_command_events = Fcons (val, Qnil); |
| 311 | error ("Non-character input-event"); |
| 312 | } |
| 313 | else |
| 314 | goto retry; |
| 315 | } |
| 316 | } |
| 317 | |
| 318 | if (! NILP (delayed_switch_frame)) |
| 319 | unread_switch_frame = delayed_switch_frame; |
| 320 | |
| 321 | return val; |
| 322 | #endif |
| 323 | } |
| 324 | |
| 325 | DEFUN ("read-char", Fread_char, Sread_char, 0, 0, 0, |
| 326 | "Read a character from the command input (keyboard or macro).\n\ |
| 327 | It is returned as a number.\n\ |
| 328 | If the user generates an event which is not a character (i.e. a mouse\n\ |
| 329 | click or function key event), `read-char' signals an error. As an\n\ |
| 330 | exception, switch-frame events are put off until non-ASCII events can\n\ |
| 331 | be read.\n\ |
| 332 | If you want to read non-character events, or ignore them, call\n\ |
| 333 | `read-event' or `read-char-exclusive' instead.") |
| 334 | () |
| 335 | { |
| 336 | return read_filtered_event (1, 1, 1); |
| 337 | } |
| 338 | |
| 339 | DEFUN ("read-event", Fread_event, Sread_event, 0, 0, 0, |
| 340 | "Read an event object from the input stream.") |
| 341 | () |
| 342 | { |
| 343 | return read_filtered_event (0, 0, 0); |
| 344 | } |
| 345 | |
| 346 | DEFUN ("read-char-exclusive", Fread_char_exclusive, Sread_char_exclusive, 0, 0, 0, |
| 347 | "Read a character from the command input (keyboard or macro).\n\ |
| 348 | It is returned as a number. Non-character events are ignored.") |
| 349 | () |
| 350 | { |
| 351 | return read_filtered_event (1, 1, 0); |
| 352 | } |
| 353 | |
| 354 | DEFUN ("get-file-char", Fget_file_char, Sget_file_char, 0, 0, 0, |
| 355 | "Don't use this yourself.") |
| 356 | () |
| 357 | { |
| 358 | register Lisp_Object val; |
| 359 | XSETINT (val, getc (instream)); |
| 360 | return val; |
| 361 | } |
| 362 | \f |
| 363 | static void readevalloop (); |
| 364 | static Lisp_Object load_unwind (); |
| 365 | static Lisp_Object load_descriptor_unwind (); |
| 366 | |
| 367 | DEFUN ("load", Fload, Sload, 1, 4, 0, |
| 368 | "Execute a file of Lisp code named FILE.\n\ |
| 369 | First try FILE with `.elc' appended, then try with `.el',\n\ |
| 370 | then try FILE unmodified.\n\ |
| 371 | This function searches the directories in `load-path'.\n\ |
| 372 | If optional second arg NOERROR is non-nil,\n\ |
| 373 | report no error if FILE doesn't exist.\n\ |
| 374 | Print messages at start and end of loading unless\n\ |
| 375 | optional third arg NOMESSAGE is non-nil.\n\ |
| 376 | If optional fourth arg NOSUFFIX is non-nil, don't try adding\n\ |
| 377 | suffixes `.elc' or `.el' to the specified name FILE.\n\ |
| 378 | Return t if file exists.") |
| 379 | (file, noerror, nomessage, nosuffix) |
| 380 | Lisp_Object file, noerror, nomessage, nosuffix; |
| 381 | { |
| 382 | register FILE *stream; |
| 383 | register int fd = -1; |
| 384 | register Lisp_Object lispstream; |
| 385 | int count = specpdl_ptr - specpdl; |
| 386 | Lisp_Object temp; |
| 387 | struct gcpro gcpro1; |
| 388 | Lisp_Object found; |
| 389 | /* 1 means inhibit the message at the beginning. */ |
| 390 | int nomessage1 = 0; |
| 391 | Lisp_Object handler; |
| 392 | #ifdef DOS_NT |
| 393 | char *dosmode = "rt"; |
| 394 | #endif /* DOS_NT */ |
| 395 | |
| 396 | CHECK_STRING (file, 0); |
| 397 | |
| 398 | /* If file name is magic, call the handler. */ |
| 399 | handler = Ffind_file_name_handler (file, Qload); |
| 400 | if (!NILP (handler)) |
| 401 | return call5 (handler, Qload, file, noerror, nomessage, nosuffix); |
| 402 | |
| 403 | /* Do this after the handler to avoid |
| 404 | the need to gcpro noerror, nomessage and nosuffix. |
| 405 | (Below here, we care only whether they are nil or not.) */ |
| 406 | file = Fsubstitute_in_file_name (file); |
| 407 | |
| 408 | /* Avoid weird lossage with null string as arg, |
| 409 | since it would try to load a directory as a Lisp file */ |
| 410 | if (XSTRING (file)->size > 0) |
| 411 | { |
| 412 | GCPRO1 (file); |
| 413 | fd = openp (Vload_path, file, !NILP (nosuffix) ? "" : ".elc:.el:", |
| 414 | &found, 0); |
| 415 | UNGCPRO; |
| 416 | } |
| 417 | |
| 418 | if (fd < 0) |
| 419 | { |
| 420 | if (NILP (noerror)) |
| 421 | while (1) |
| 422 | Fsignal (Qfile_error, Fcons (build_string ("Cannot open load file"), |
| 423 | Fcons (file, Qnil))); |
| 424 | else |
| 425 | return Qnil; |
| 426 | } |
| 427 | |
| 428 | if (!bcmp (&(XSTRING (found)->data[XSTRING (found)->size - 4]), |
| 429 | ".elc", 4)) |
| 430 | { |
| 431 | struct stat s1, s2; |
| 432 | int result; |
| 433 | |
| 434 | #ifdef DOS_NT |
| 435 | dosmode = "rb"; |
| 436 | #endif /* DOS_NT */ |
| 437 | stat ((char *)XSTRING (found)->data, &s1); |
| 438 | XSTRING (found)->data[XSTRING (found)->size - 1] = 0; |
| 439 | result = stat ((char *)XSTRING (found)->data, &s2); |
| 440 | if (result >= 0 && (unsigned) s1.st_mtime < (unsigned) s2.st_mtime) |
| 441 | { |
| 442 | message ("Source file `%s' newer than byte-compiled file", |
| 443 | XSTRING (found)->data); |
| 444 | /* Don't immediately overwrite this message. */ |
| 445 | if (!noninteractive) |
| 446 | nomessage1 = 1; |
| 447 | } |
| 448 | XSTRING (found)->data[XSTRING (found)->size - 1] = 'c'; |
| 449 | } |
| 450 | |
| 451 | #ifdef DOS_NT |
| 452 | close (fd); |
| 453 | stream = fopen ((char *) XSTRING (found)->data, dosmode); |
| 454 | #else /* not DOS_NT */ |
| 455 | stream = fdopen (fd, "r"); |
| 456 | #endif /* not DOS_NT */ |
| 457 | if (stream == 0) |
| 458 | { |
| 459 | close (fd); |
| 460 | error ("Failure to create stdio stream for %s", XSTRING (file)->data); |
| 461 | } |
| 462 | |
| 463 | if (NILP (nomessage) && !nomessage1) |
| 464 | message ("Loading %s...", XSTRING (file)->data); |
| 465 | |
| 466 | GCPRO1 (file); |
| 467 | lispstream = Fcons (Qnil, Qnil); |
| 468 | XSETFASTINT (XCONS (lispstream)->car, (EMACS_UINT)stream >> 16); |
| 469 | XSETFASTINT (XCONS (lispstream)->cdr, (EMACS_UINT)stream & 0xffff); |
| 470 | record_unwind_protect (load_unwind, lispstream); |
| 471 | record_unwind_protect (load_descriptor_unwind, load_descriptor_list); |
| 472 | specbind (Qload_file_name, found); |
| 473 | load_descriptor_list |
| 474 | = Fcons (make_number (fileno (stream)), load_descriptor_list); |
| 475 | load_in_progress++; |
| 476 | readevalloop (Qget_file_char, stream, file, Feval, 0); |
| 477 | unbind_to (count, Qnil); |
| 478 | |
| 479 | /* Run any load-hooks for this file. */ |
| 480 | temp = Fassoc (file, Vafter_load_alist); |
| 481 | if (!NILP (temp)) |
| 482 | Fprogn (Fcdr (temp)); |
| 483 | UNGCPRO; |
| 484 | |
| 485 | if (saved_doc_string) |
| 486 | free (saved_doc_string); |
| 487 | saved_doc_string = 0; |
| 488 | saved_doc_string_size = 0; |
| 489 | |
| 490 | if (!noninteractive && NILP (nomessage)) |
| 491 | message ("Loading %s...done", XSTRING (file)->data); |
| 492 | return Qt; |
| 493 | } |
| 494 | |
| 495 | static Lisp_Object |
| 496 | load_unwind (stream) /* used as unwind-protect function in load */ |
| 497 | Lisp_Object stream; |
| 498 | { |
| 499 | fclose ((FILE *) (XFASTINT (XCONS (stream)->car) << 16 |
| 500 | | XFASTINT (XCONS (stream)->cdr))); |
| 501 | if (--load_in_progress < 0) load_in_progress = 0; |
| 502 | return Qnil; |
| 503 | } |
| 504 | |
| 505 | static Lisp_Object |
| 506 | load_descriptor_unwind (oldlist) |
| 507 | Lisp_Object oldlist; |
| 508 | { |
| 509 | load_descriptor_list = oldlist; |
| 510 | return Qnil; |
| 511 | } |
| 512 | |
| 513 | /* Close all descriptors in use for Floads. |
| 514 | This is used when starting a subprocess. */ |
| 515 | |
| 516 | void |
| 517 | close_load_descs () |
| 518 | { |
| 519 | Lisp_Object tail; |
| 520 | for (tail = load_descriptor_list; !NILP (tail); tail = XCONS (tail)->cdr) |
| 521 | close (XFASTINT (XCONS (tail)->car)); |
| 522 | } |
| 523 | \f |
| 524 | static int |
| 525 | complete_filename_p (pathname) |
| 526 | Lisp_Object pathname; |
| 527 | { |
| 528 | register unsigned char *s = XSTRING (pathname)->data; |
| 529 | return (IS_DIRECTORY_SEP (s[0]) |
| 530 | || (XSTRING (pathname)->size > 2 |
| 531 | && IS_DEVICE_SEP (s[1]) && IS_DIRECTORY_SEP (s[2])) |
| 532 | #ifdef ALTOS |
| 533 | || *s == '@' |
| 534 | #endif |
| 535 | #ifdef VMS |
| 536 | || index (s, ':') |
| 537 | #endif /* VMS */ |
| 538 | ); |
| 539 | } |
| 540 | |
| 541 | /* Search for a file whose name is STR, looking in directories |
| 542 | in the Lisp list PATH, and trying suffixes from SUFFIX. |
| 543 | SUFFIX is a string containing possible suffixes separated by colons. |
| 544 | On success, returns a file descriptor. On failure, returns -1. |
| 545 | |
| 546 | EXEC_ONLY nonzero means don't open the files, |
| 547 | just look for one that is executable. In this case, |
| 548 | returns 1 on success. |
| 549 | |
| 550 | If STOREPTR is nonzero, it points to a slot where the name of |
| 551 | the file actually found should be stored as a Lisp string. |
| 552 | Nil is stored there on failure. */ |
| 553 | |
| 554 | int |
| 555 | openp (path, str, suffix, storeptr, exec_only) |
| 556 | Lisp_Object path, str; |
| 557 | char *suffix; |
| 558 | Lisp_Object *storeptr; |
| 559 | int exec_only; |
| 560 | { |
| 561 | register int fd; |
| 562 | int fn_size = 100; |
| 563 | char buf[100]; |
| 564 | register char *fn = buf; |
| 565 | int absolute = 0; |
| 566 | int want_size; |
| 567 | register Lisp_Object filename; |
| 568 | struct stat st; |
| 569 | struct gcpro gcpro1; |
| 570 | |
| 571 | GCPRO1 (str); |
| 572 | if (storeptr) |
| 573 | *storeptr = Qnil; |
| 574 | |
| 575 | if (complete_filename_p (str)) |
| 576 | absolute = 1; |
| 577 | |
| 578 | for (; !NILP (path); path = Fcdr (path)) |
| 579 | { |
| 580 | char *nsuffix; |
| 581 | |
| 582 | filename = Fexpand_file_name (str, Fcar (path)); |
| 583 | if (!complete_filename_p (filename)) |
| 584 | /* If there are non-absolute elts in PATH (eg ".") */ |
| 585 | /* Of course, this could conceivably lose if luser sets |
| 586 | default-directory to be something non-absolute... */ |
| 587 | { |
| 588 | filename = Fexpand_file_name (filename, current_buffer->directory); |
| 589 | if (!complete_filename_p (filename)) |
| 590 | /* Give up on this path element! */ |
| 591 | continue; |
| 592 | } |
| 593 | |
| 594 | /* Calculate maximum size of any filename made from |
| 595 | this path element/specified file name and any possible suffix. */ |
| 596 | want_size = strlen (suffix) + XSTRING (filename)->size + 1; |
| 597 | if (fn_size < want_size) |
| 598 | fn = (char *) alloca (fn_size = 100 + want_size); |
| 599 | |
| 600 | nsuffix = suffix; |
| 601 | |
| 602 | /* Loop over suffixes. */ |
| 603 | while (1) |
| 604 | { |
| 605 | char *esuffix = (char *) index (nsuffix, ':'); |
| 606 | int lsuffix = esuffix ? esuffix - nsuffix : strlen (nsuffix); |
| 607 | |
| 608 | /* Concatenate path element/specified name with the suffix. */ |
| 609 | strncpy (fn, XSTRING (filename)->data, XSTRING (filename)->size); |
| 610 | fn[XSTRING (filename)->size] = 0; |
| 611 | if (lsuffix != 0) /* Bug happens on CCI if lsuffix is 0. */ |
| 612 | strncat (fn, nsuffix, lsuffix); |
| 613 | |
| 614 | /* Ignore file if it's a directory. */ |
| 615 | if (stat (fn, &st) >= 0 |
| 616 | && (st.st_mode & S_IFMT) != S_IFDIR) |
| 617 | { |
| 618 | /* Check that we can access or open it. */ |
| 619 | if (exec_only) |
| 620 | fd = (access (fn, X_OK) == 0) ? 1 : -1; |
| 621 | else |
| 622 | fd = open (fn, O_RDONLY, 0); |
| 623 | |
| 624 | if (fd >= 0) |
| 625 | { |
| 626 | /* We succeeded; return this descriptor and filename. */ |
| 627 | if (storeptr) |
| 628 | *storeptr = build_string (fn); |
| 629 | UNGCPRO; |
| 630 | return fd; |
| 631 | } |
| 632 | } |
| 633 | |
| 634 | /* Advance to next suffix. */ |
| 635 | if (esuffix == 0) |
| 636 | break; |
| 637 | nsuffix += lsuffix + 1; |
| 638 | } |
| 639 | if (absolute) |
| 640 | break; |
| 641 | } |
| 642 | |
| 643 | UNGCPRO; |
| 644 | return -1; |
| 645 | } |
| 646 | |
| 647 | \f |
| 648 | /* Merge the list we've accumulated of globals from the current input source |
| 649 | into the load_history variable. The details depend on whether |
| 650 | the source has an associated file name or not. */ |
| 651 | |
| 652 | static void |
| 653 | build_load_history (stream, source) |
| 654 | FILE *stream; |
| 655 | Lisp_Object source; |
| 656 | { |
| 657 | register Lisp_Object tail, prev, newelt; |
| 658 | register Lisp_Object tem, tem2; |
| 659 | register int foundit, loading; |
| 660 | |
| 661 | /* Don't bother recording anything for preloaded files. */ |
| 662 | if (!NILP (Vpurify_flag)) |
| 663 | return; |
| 664 | |
| 665 | loading = stream || !NARROWED; |
| 666 | |
| 667 | tail = Vload_history; |
| 668 | prev = Qnil; |
| 669 | foundit = 0; |
| 670 | while (!NILP (tail)) |
| 671 | { |
| 672 | tem = Fcar (tail); |
| 673 | |
| 674 | /* Find the feature's previous assoc list... */ |
| 675 | if (!NILP (Fequal (source, Fcar (tem)))) |
| 676 | { |
| 677 | foundit = 1; |
| 678 | |
| 679 | /* If we're loading, remove it. */ |
| 680 | if (loading) |
| 681 | { |
| 682 | if (NILP (prev)) |
| 683 | Vload_history = Fcdr (tail); |
| 684 | else |
| 685 | Fsetcdr (prev, Fcdr (tail)); |
| 686 | } |
| 687 | |
| 688 | /* Otherwise, cons on new symbols that are not already members. */ |
| 689 | else |
| 690 | { |
| 691 | tem2 = Vcurrent_load_list; |
| 692 | |
| 693 | while (CONSP (tem2)) |
| 694 | { |
| 695 | newelt = Fcar (tem2); |
| 696 | |
| 697 | if (NILP (Fmemq (newelt, tem))) |
| 698 | Fsetcar (tail, Fcons (Fcar (tem), |
| 699 | Fcons (newelt, Fcdr (tem)))); |
| 700 | |
| 701 | tem2 = Fcdr (tem2); |
| 702 | QUIT; |
| 703 | } |
| 704 | } |
| 705 | } |
| 706 | else |
| 707 | prev = tail; |
| 708 | tail = Fcdr (tail); |
| 709 | QUIT; |
| 710 | } |
| 711 | |
| 712 | /* If we're loading, cons the new assoc onto the front of load-history, |
| 713 | the most-recently-loaded position. Also do this if we didn't find |
| 714 | an existing member for the current source. */ |
| 715 | if (loading || !foundit) |
| 716 | Vload_history = Fcons (Fnreverse (Vcurrent_load_list), |
| 717 | Vload_history); |
| 718 | } |
| 719 | |
| 720 | Lisp_Object |
| 721 | unreadpure () /* Used as unwind-protect function in readevalloop */ |
| 722 | { |
| 723 | read_pure = 0; |
| 724 | return Qnil; |
| 725 | } |
| 726 | |
| 727 | static void |
| 728 | readevalloop (readcharfun, stream, sourcename, evalfun, printflag) |
| 729 | Lisp_Object readcharfun; |
| 730 | FILE *stream; |
| 731 | Lisp_Object sourcename; |
| 732 | Lisp_Object (*evalfun) (); |
| 733 | int printflag; |
| 734 | { |
| 735 | register int c; |
| 736 | register Lisp_Object val; |
| 737 | int count = specpdl_ptr - specpdl; |
| 738 | struct gcpro gcpro1; |
| 739 | struct buffer *b = 0; |
| 740 | |
| 741 | if (BUFFERP (readcharfun)) |
| 742 | b = XBUFFER (readcharfun); |
| 743 | else if (MARKERP (readcharfun)) |
| 744 | b = XMARKER (readcharfun)->buffer; |
| 745 | |
| 746 | specbind (Qstandard_input, readcharfun); |
| 747 | specbind (Qcurrent_load_list, Qnil); |
| 748 | |
| 749 | GCPRO1 (sourcename); |
| 750 | |
| 751 | LOADHIST_ATTACH (sourcename); |
| 752 | |
| 753 | while (1) |
| 754 | { |
| 755 | if (b != 0 && NILP (b->name)) |
| 756 | error ("Reading from killed buffer"); |
| 757 | |
| 758 | instream = stream; |
| 759 | c = READCHAR; |
| 760 | if (c == ';') |
| 761 | { |
| 762 | while ((c = READCHAR) != '\n' && c != -1); |
| 763 | continue; |
| 764 | } |
| 765 | if (c < 0) break; |
| 766 | |
| 767 | /* Ignore whitespace here, so we can detect eof. */ |
| 768 | if (c == ' ' || c == '\t' || c == '\n' || c == '\f' || c == '\r') |
| 769 | continue; |
| 770 | |
| 771 | if (!NILP (Vpurify_flag) && c == '(') |
| 772 | { |
| 773 | int count1 = specpdl_ptr - specpdl; |
| 774 | record_unwind_protect (unreadpure, Qnil); |
| 775 | val = read_list (-1, readcharfun); |
| 776 | unbind_to (count1, Qnil); |
| 777 | } |
| 778 | else |
| 779 | { |
| 780 | UNREAD (c); |
| 781 | if (NILP (Vload_read_function)) |
| 782 | val = read0 (readcharfun); |
| 783 | else |
| 784 | val = call1 (Vload_read_function, readcharfun); |
| 785 | } |
| 786 | |
| 787 | val = (*evalfun) (val); |
| 788 | if (printflag) |
| 789 | { |
| 790 | Vvalues = Fcons (val, Vvalues); |
| 791 | if (EQ (Vstandard_output, Qt)) |
| 792 | Fprin1 (val, Qnil); |
| 793 | else |
| 794 | Fprint (val, Qnil); |
| 795 | } |
| 796 | } |
| 797 | |
| 798 | build_load_history (stream, sourcename); |
| 799 | UNGCPRO; |
| 800 | |
| 801 | unbind_to (count, Qnil); |
| 802 | } |
| 803 | |
| 804 | #ifndef standalone |
| 805 | |
| 806 | DEFUN ("eval-buffer", Feval_buffer, Seval_buffer, 0, 2, "", |
| 807 | "Execute the current buffer as Lisp code.\n\ |
| 808 | Programs can pass two arguments, BUFFER and PRINTFLAG.\n\ |
| 809 | BUFFER is the buffer to evaluate (nil means use current buffer).\n\ |
| 810 | PRINTFLAG controls printing of output:\n\ |
| 811 | nil means discard it; anything else is stream for print.\n\ |
| 812 | \n\ |
| 813 | If there is no error, point does not move. If there is an error,\n\ |
| 814 | point remains at the end of the last character read from the buffer.") |
| 815 | (buffer, printflag) |
| 816 | Lisp_Object buffer, printflag; |
| 817 | { |
| 818 | int count = specpdl_ptr - specpdl; |
| 819 | Lisp_Object tem, buf; |
| 820 | |
| 821 | if (NILP (buffer)) |
| 822 | buf = Fcurrent_buffer (); |
| 823 | else |
| 824 | buf = Fget_buffer (buffer); |
| 825 | if (NILP (buf)) |
| 826 | error ("No such buffer."); |
| 827 | |
| 828 | if (NILP (printflag)) |
| 829 | tem = Qsymbolp; |
| 830 | else |
| 831 | tem = printflag; |
| 832 | specbind (Qstandard_output, tem); |
| 833 | record_unwind_protect (save_excursion_restore, save_excursion_save ()); |
| 834 | BUF_SET_PT (XBUFFER (buf), BUF_BEGV (XBUFFER (buf))); |
| 835 | readevalloop (buf, 0, XBUFFER (buf)->filename, Feval, !NILP (printflag)); |
| 836 | unbind_to (count, Qnil); |
| 837 | |
| 838 | return Qnil; |
| 839 | } |
| 840 | |
| 841 | #if 0 |
| 842 | DEFUN ("eval-current-buffer", Feval_current_buffer, Seval_current_buffer, 0, 1, "", |
| 843 | "Execute the current buffer as Lisp code.\n\ |
| 844 | Programs can pass argument PRINTFLAG which controls printing of output:\n\ |
| 845 | nil means discard it; anything else is stream for print.\n\ |
| 846 | \n\ |
| 847 | If there is no error, point does not move. If there is an error,\n\ |
| 848 | point remains at the end of the last character read from the buffer.") |
| 849 | (printflag) |
| 850 | Lisp_Object printflag; |
| 851 | { |
| 852 | int count = specpdl_ptr - specpdl; |
| 853 | Lisp_Object tem, cbuf; |
| 854 | |
| 855 | cbuf = Fcurrent_buffer () |
| 856 | |
| 857 | if (NILP (printflag)) |
| 858 | tem = Qsymbolp; |
| 859 | else |
| 860 | tem = printflag; |
| 861 | specbind (Qstandard_output, tem); |
| 862 | record_unwind_protect (save_excursion_restore, save_excursion_save ()); |
| 863 | SET_PT (BEGV); |
| 864 | readevalloop (cbuf, 0, XBUFFER (cbuf)->filename, Feval, !NILP (printflag)); |
| 865 | return unbind_to (count, Qnil); |
| 866 | } |
| 867 | #endif |
| 868 | |
| 869 | DEFUN ("eval-region", Feval_region, Seval_region, 2, 3, "r", |
| 870 | "Execute the region as Lisp code.\n\ |
| 871 | When called from programs, expects two arguments,\n\ |
| 872 | giving starting and ending indices in the current buffer\n\ |
| 873 | of the text to be executed.\n\ |
| 874 | Programs can pass third argument PRINTFLAG which controls output:\n\ |
| 875 | nil means discard it; anything else is stream for printing it.\n\ |
| 876 | \n\ |
| 877 | If there is no error, point does not move. If there is an error,\n\ |
| 878 | point remains at the end of the last character read from the buffer.") |
| 879 | (start, end, printflag) |
| 880 | Lisp_Object start, end, printflag; |
| 881 | { |
| 882 | int count = specpdl_ptr - specpdl; |
| 883 | Lisp_Object tem, cbuf; |
| 884 | |
| 885 | cbuf = Fcurrent_buffer (); |
| 886 | |
| 887 | if (NILP (printflag)) |
| 888 | tem = Qsymbolp; |
| 889 | else |
| 890 | tem = printflag; |
| 891 | specbind (Qstandard_output, tem); |
| 892 | |
| 893 | if (NILP (printflag)) |
| 894 | record_unwind_protect (save_excursion_restore, save_excursion_save ()); |
| 895 | record_unwind_protect (save_restriction_restore, save_restriction_save ()); |
| 896 | |
| 897 | /* This both uses start and checks its type. */ |
| 898 | Fgoto_char (start); |
| 899 | Fnarrow_to_region (make_number (BEGV), end); |
| 900 | readevalloop (cbuf, 0, XBUFFER (cbuf)->filename, Feval, !NILP (printflag)); |
| 901 | |
| 902 | return unbind_to (count, Qnil); |
| 903 | } |
| 904 | |
| 905 | #endif /* standalone */ |
| 906 | \f |
| 907 | DEFUN ("read", Fread, Sread, 0, 1, 0, |
| 908 | "Read one Lisp expression as text from STREAM, return as Lisp object.\n\ |
| 909 | If STREAM is nil, use the value of `standard-input' (which see).\n\ |
| 910 | STREAM or the value of `standard-input' may be:\n\ |
| 911 | a buffer (read from point and advance it)\n\ |
| 912 | a marker (read from where it points and advance it)\n\ |
| 913 | a function (call it with no arguments for each character,\n\ |
| 914 | call it with a char as argument to push a char back)\n\ |
| 915 | a string (takes text from string, starting at the beginning)\n\ |
| 916 | t (read text line using minibuffer and use it).") |
| 917 | (stream) |
| 918 | Lisp_Object stream; |
| 919 | { |
| 920 | extern Lisp_Object Fread_minibuffer (); |
| 921 | |
| 922 | if (NILP (stream)) |
| 923 | stream = Vstandard_input; |
| 924 | if (EQ (stream, Qt)) |
| 925 | stream = Qread_char; |
| 926 | |
| 927 | new_backquote_flag = 0; |
| 928 | |
| 929 | #ifndef standalone |
| 930 | if (EQ (stream, Qread_char)) |
| 931 | return Fread_minibuffer (build_string ("Lisp expression: "), Qnil); |
| 932 | #endif |
| 933 | |
| 934 | if (STRINGP (stream)) |
| 935 | return Fcar (Fread_from_string (stream, Qnil, Qnil)); |
| 936 | |
| 937 | return read0 (stream); |
| 938 | } |
| 939 | |
| 940 | DEFUN ("read-from-string", Fread_from_string, Sread_from_string, 1, 3, 0, |
| 941 | "Read one Lisp expression which is represented as text by STRING.\n\ |
| 942 | Returns a cons: (OBJECT-READ . FINAL-STRING-INDEX).\n\ |
| 943 | START and END optionally delimit a substring of STRING from which to read;\n\ |
| 944 | they default to 0 and (length STRING) respectively.") |
| 945 | (string, start, end) |
| 946 | Lisp_Object string, start, end; |
| 947 | { |
| 948 | int startval, endval; |
| 949 | Lisp_Object tem; |
| 950 | |
| 951 | CHECK_STRING (string,0); |
| 952 | |
| 953 | if (NILP (end)) |
| 954 | endval = XSTRING (string)->size; |
| 955 | else |
| 956 | { CHECK_NUMBER (end,2); |
| 957 | endval = XINT (end); |
| 958 | if (endval < 0 || endval > XSTRING (string)->size) |
| 959 | args_out_of_range (string, end); |
| 960 | } |
| 961 | |
| 962 | if (NILP (start)) |
| 963 | startval = 0; |
| 964 | else |
| 965 | { CHECK_NUMBER (start,1); |
| 966 | startval = XINT (start); |
| 967 | if (startval < 0 || startval > endval) |
| 968 | args_out_of_range (string, start); |
| 969 | } |
| 970 | |
| 971 | read_from_string_index = startval; |
| 972 | read_from_string_limit = endval; |
| 973 | |
| 974 | new_backquote_flag = 0; |
| 975 | |
| 976 | tem = read0 (string); |
| 977 | return Fcons (tem, make_number (read_from_string_index)); |
| 978 | } |
| 979 | \f |
| 980 | /* Use this for recursive reads, in contexts where internal tokens |
| 981 | are not allowed. */ |
| 982 | static Lisp_Object |
| 983 | read0 (readcharfun) |
| 984 | Lisp_Object readcharfun; |
| 985 | { |
| 986 | register Lisp_Object val; |
| 987 | char c; |
| 988 | |
| 989 | val = read1 (readcharfun, &c, 0); |
| 990 | if (c) |
| 991 | Fsignal (Qinvalid_read_syntax, Fcons (make_string (&c, 1), Qnil)); |
| 992 | |
| 993 | return val; |
| 994 | } |
| 995 | \f |
| 996 | static int read_buffer_size; |
| 997 | static char *read_buffer; |
| 998 | |
| 999 | static int |
| 1000 | read_escape (readcharfun) |
| 1001 | Lisp_Object readcharfun; |
| 1002 | { |
| 1003 | register int c = READCHAR; |
| 1004 | switch (c) |
| 1005 | { |
| 1006 | case 'a': |
| 1007 | return '\007'; |
| 1008 | case 'b': |
| 1009 | return '\b'; |
| 1010 | case 'd': |
| 1011 | return 0177; |
| 1012 | case 'e': |
| 1013 | return 033; |
| 1014 | case 'f': |
| 1015 | return '\f'; |
| 1016 | case 'n': |
| 1017 | return '\n'; |
| 1018 | case 'r': |
| 1019 | return '\r'; |
| 1020 | case 't': |
| 1021 | return '\t'; |
| 1022 | case 'v': |
| 1023 | return '\v'; |
| 1024 | case '\n': |
| 1025 | return -1; |
| 1026 | |
| 1027 | case 'M': |
| 1028 | c = READCHAR; |
| 1029 | if (c != '-') |
| 1030 | error ("Invalid escape character syntax"); |
| 1031 | c = READCHAR; |
| 1032 | if (c == '\\') |
| 1033 | c = read_escape (readcharfun); |
| 1034 | return c | meta_modifier; |
| 1035 | |
| 1036 | case 'S': |
| 1037 | c = READCHAR; |
| 1038 | if (c != '-') |
| 1039 | error ("Invalid escape character syntax"); |
| 1040 | c = READCHAR; |
| 1041 | if (c == '\\') |
| 1042 | c = read_escape (readcharfun); |
| 1043 | return c | shift_modifier; |
| 1044 | |
| 1045 | case 'H': |
| 1046 | c = READCHAR; |
| 1047 | if (c != '-') |
| 1048 | error ("Invalid escape character syntax"); |
| 1049 | c = READCHAR; |
| 1050 | if (c == '\\') |
| 1051 | c = read_escape (readcharfun); |
| 1052 | return c | hyper_modifier; |
| 1053 | |
| 1054 | case 'A': |
| 1055 | c = READCHAR; |
| 1056 | if (c != '-') |
| 1057 | error ("Invalid escape character syntax"); |
| 1058 | c = READCHAR; |
| 1059 | if (c == '\\') |
| 1060 | c = read_escape (readcharfun); |
| 1061 | return c | alt_modifier; |
| 1062 | |
| 1063 | case 's': |
| 1064 | c = READCHAR; |
| 1065 | if (c != '-') |
| 1066 | error ("Invalid escape character syntax"); |
| 1067 | c = READCHAR; |
| 1068 | if (c == '\\') |
| 1069 | c = read_escape (readcharfun); |
| 1070 | return c | super_modifier; |
| 1071 | |
| 1072 | case 'C': |
| 1073 | c = READCHAR; |
| 1074 | if (c != '-') |
| 1075 | error ("Invalid escape character syntax"); |
| 1076 | case '^': |
| 1077 | c = READCHAR; |
| 1078 | if (c == '\\') |
| 1079 | c = read_escape (readcharfun); |
| 1080 | if ((c & 0177) == '?') |
| 1081 | return 0177 | c; |
| 1082 | /* ASCII control chars are made from letters (both cases), |
| 1083 | as well as the non-letters within 0100...0137. */ |
| 1084 | else if ((c & 0137) >= 0101 && (c & 0137) <= 0132) |
| 1085 | return (c & (037 | ~0177)); |
| 1086 | else if ((c & 0177) >= 0100 && (c & 0177) <= 0137) |
| 1087 | return (c & (037 | ~0177)); |
| 1088 | else |
| 1089 | return c | ctrl_modifier; |
| 1090 | |
| 1091 | case '0': |
| 1092 | case '1': |
| 1093 | case '2': |
| 1094 | case '3': |
| 1095 | case '4': |
| 1096 | case '5': |
| 1097 | case '6': |
| 1098 | case '7': |
| 1099 | /* An octal escape, as in ANSI C. */ |
| 1100 | { |
| 1101 | register int i = c - '0'; |
| 1102 | register int count = 0; |
| 1103 | while (++count < 3) |
| 1104 | { |
| 1105 | if ((c = READCHAR) >= '0' && c <= '7') |
| 1106 | { |
| 1107 | i *= 8; |
| 1108 | i += c - '0'; |
| 1109 | } |
| 1110 | else |
| 1111 | { |
| 1112 | UNREAD (c); |
| 1113 | break; |
| 1114 | } |
| 1115 | } |
| 1116 | return i; |
| 1117 | } |
| 1118 | |
| 1119 | case 'x': |
| 1120 | /* A hex escape, as in ANSI C. */ |
| 1121 | { |
| 1122 | int i = 0; |
| 1123 | while (1) |
| 1124 | { |
| 1125 | c = READCHAR; |
| 1126 | if (c >= '0' && c <= '9') |
| 1127 | { |
| 1128 | i *= 16; |
| 1129 | i += c - '0'; |
| 1130 | } |
| 1131 | else if ((c >= 'a' && c <= 'f') |
| 1132 | || (c >= 'A' && c <= 'F')) |
| 1133 | { |
| 1134 | i *= 16; |
| 1135 | if (c >= 'a' && c <= 'f') |
| 1136 | i += c - 'a' + 10; |
| 1137 | else |
| 1138 | i += c - 'A' + 10; |
| 1139 | } |
| 1140 | else |
| 1141 | { |
| 1142 | UNREAD (c); |
| 1143 | break; |
| 1144 | } |
| 1145 | } |
| 1146 | return i; |
| 1147 | } |
| 1148 | |
| 1149 | default: |
| 1150 | return c; |
| 1151 | } |
| 1152 | } |
| 1153 | |
| 1154 | /* If the next token is ')' or ']' or '.', we store that character |
| 1155 | in *PCH and the return value is not interesting. Else, we store |
| 1156 | zero in *PCH and we read and return one lisp object. |
| 1157 | |
| 1158 | FIRST_IN_LIST is nonzero if this is the first element of a list. */ |
| 1159 | |
| 1160 | static Lisp_Object |
| 1161 | read1 (readcharfun, pch, first_in_list) |
| 1162 | register Lisp_Object readcharfun; |
| 1163 | char *pch; |
| 1164 | int first_in_list; |
| 1165 | { |
| 1166 | register int c; |
| 1167 | *pch = 0; |
| 1168 | |
| 1169 | retry: |
| 1170 | |
| 1171 | c = READCHAR; |
| 1172 | if (c < 0) return Fsignal (Qend_of_file, Qnil); |
| 1173 | |
| 1174 | switch (c) |
| 1175 | { |
| 1176 | case '(': |
| 1177 | return read_list (0, readcharfun); |
| 1178 | |
| 1179 | case '[': |
| 1180 | return read_vector (readcharfun); |
| 1181 | |
| 1182 | case ')': |
| 1183 | case ']': |
| 1184 | { |
| 1185 | *pch = c; |
| 1186 | return Qnil; |
| 1187 | } |
| 1188 | |
| 1189 | case '#': |
| 1190 | c = READCHAR; |
| 1191 | if (c == '^') |
| 1192 | { |
| 1193 | c = READCHAR; |
| 1194 | if (c == '[') |
| 1195 | { |
| 1196 | Lisp_Object tmp; |
| 1197 | tmp = read_vector (readcharfun); |
| 1198 | if (XVECTOR (tmp)->size < CHAR_TABLE_STANDARD_SLOTS |
| 1199 | || XVECTOR (tmp)->size > CHAR_TABLE_STANDARD_SLOTS + 10) |
| 1200 | error ("Invalid size char-table"); |
| 1201 | XSETCHAR_TABLE (tmp, XCHAR_TABLE (tmp)); |
| 1202 | return tmp; |
| 1203 | } |
| 1204 | Fsignal (Qinvalid_read_syntax, Fcons (make_string ("#^", 2), Qnil)); |
| 1205 | } |
| 1206 | if (c == '&') |
| 1207 | { |
| 1208 | Lisp_Object length; |
| 1209 | length = read1 (readcharfun, pch, first_in_list); |
| 1210 | c = READCHAR; |
| 1211 | if (c == '"') |
| 1212 | { |
| 1213 | Lisp_Object tmp, val; |
| 1214 | int size_in_chars = ((XFASTINT (length) + BITS_PER_CHAR) |
| 1215 | / BITS_PER_CHAR); |
| 1216 | |
| 1217 | UNREAD (c); |
| 1218 | tmp = read1 (readcharfun, pch, first_in_list); |
| 1219 | if (size_in_chars != XSTRING (tmp)->size) |
| 1220 | Fsignal (Qinvalid_read_syntax, |
| 1221 | Fcons (make_string ("#&", 2), Qnil)); |
| 1222 | |
| 1223 | val = Fmake_bool_vector (length, Qnil); |
| 1224 | bcopy (XSTRING (tmp)->data, XBOOL_VECTOR (val)->data, |
| 1225 | size_in_chars); |
| 1226 | return val; |
| 1227 | } |
| 1228 | Fsignal (Qinvalid_read_syntax, Fcons (make_string ("#&", 2), Qnil)); |
| 1229 | } |
| 1230 | if (c == '[') |
| 1231 | { |
| 1232 | /* Accept compiled functions at read-time so that we don't have to |
| 1233 | build them using function calls. */ |
| 1234 | Lisp_Object tmp; |
| 1235 | tmp = read_vector (readcharfun); |
| 1236 | return Fmake_byte_code (XVECTOR (tmp)->size, |
| 1237 | XVECTOR (tmp)->contents); |
| 1238 | } |
| 1239 | #ifdef USE_TEXT_PROPERTIES |
| 1240 | if (c == '(') |
| 1241 | { |
| 1242 | Lisp_Object tmp; |
| 1243 | struct gcpro gcpro1; |
| 1244 | char ch; |
| 1245 | |
| 1246 | /* Read the string itself. */ |
| 1247 | tmp = read1 (readcharfun, &ch, 0); |
| 1248 | if (ch != 0 || !STRINGP (tmp)) |
| 1249 | Fsignal (Qinvalid_read_syntax, Fcons (make_string ("#", 1), Qnil)); |
| 1250 | GCPRO1 (tmp); |
| 1251 | /* Read the intervals and their properties. */ |
| 1252 | while (1) |
| 1253 | { |
| 1254 | Lisp_Object beg, end, plist; |
| 1255 | |
| 1256 | beg = read1 (readcharfun, &ch, 0); |
| 1257 | if (ch == ')') |
| 1258 | break; |
| 1259 | if (ch == 0) |
| 1260 | end = read1 (readcharfun, &ch, 0); |
| 1261 | if (ch == 0) |
| 1262 | plist = read1 (readcharfun, &ch, 0); |
| 1263 | if (ch) |
| 1264 | Fsignal (Qinvalid_read_syntax, |
| 1265 | Fcons (build_string ("invalid string property list"), |
| 1266 | Qnil)); |
| 1267 | Fset_text_properties (beg, end, plist, tmp); |
| 1268 | } |
| 1269 | UNGCPRO; |
| 1270 | return tmp; |
| 1271 | } |
| 1272 | #endif |
| 1273 | /* #@NUMBER is used to skip NUMBER following characters. |
| 1274 | That's used in .elc files to skip over doc strings |
| 1275 | and function definitions. */ |
| 1276 | if (c == '@') |
| 1277 | { |
| 1278 | int i, nskip = 0; |
| 1279 | |
| 1280 | /* Read a decimal integer. */ |
| 1281 | while ((c = READCHAR) >= 0 |
| 1282 | && c >= '0' && c <= '9') |
| 1283 | { |
| 1284 | nskip *= 10; |
| 1285 | nskip += c - '0'; |
| 1286 | } |
| 1287 | if (c >= 0) |
| 1288 | UNREAD (c); |
| 1289 | |
| 1290 | #ifndef DOS_NT /* I don't know if filepos works right on MSDOS and Windoze. */ |
| 1291 | if (load_force_doc_strings && EQ (readcharfun, Qget_file_char)) |
| 1292 | { |
| 1293 | /* If we are supposed to force doc strings into core right now, |
| 1294 | record the last string that we skipped, |
| 1295 | and record where in the file it comes from. */ |
| 1296 | if (saved_doc_string_size == 0) |
| 1297 | { |
| 1298 | saved_doc_string_size = nskip + 100; |
| 1299 | saved_doc_string = (char *) xmalloc (saved_doc_string_size); |
| 1300 | } |
| 1301 | if (nskip > saved_doc_string_size) |
| 1302 | { |
| 1303 | saved_doc_string_size = nskip + 100; |
| 1304 | saved_doc_string = (char *) xrealloc (saved_doc_string, |
| 1305 | saved_doc_string_size); |
| 1306 | } |
| 1307 | |
| 1308 | saved_doc_string_position = ftell (instream); |
| 1309 | |
| 1310 | /* Copy that many characters into saved_doc_string. */ |
| 1311 | for (i = 0; i < nskip && c >= 0; i++) |
| 1312 | saved_doc_string[i] = c = READCHAR; |
| 1313 | |
| 1314 | saved_doc_string_length = i; |
| 1315 | } |
| 1316 | else |
| 1317 | #endif /* not DOS_NT */ |
| 1318 | { |
| 1319 | /* Skip that many characters. */ |
| 1320 | for (i = 0; i < nskip && c >= 0; i++) |
| 1321 | c = READCHAR; |
| 1322 | } |
| 1323 | goto retry; |
| 1324 | } |
| 1325 | if (c == '$') |
| 1326 | return Vload_file_name; |
| 1327 | if (c == '\'') |
| 1328 | return Fcons (Qfunction, Fcons (read0 (readcharfun), Qnil)); |
| 1329 | |
| 1330 | |
| 1331 | UNREAD (c); |
| 1332 | Fsignal (Qinvalid_read_syntax, Fcons (make_string ("#", 1), Qnil)); |
| 1333 | |
| 1334 | case ';': |
| 1335 | while ((c = READCHAR) >= 0 && c != '\n'); |
| 1336 | goto retry; |
| 1337 | |
| 1338 | case '\'': |
| 1339 | { |
| 1340 | return Fcons (Qquote, Fcons (read0 (readcharfun), Qnil)); |
| 1341 | } |
| 1342 | |
| 1343 | case '`': |
| 1344 | if (first_in_list) |
| 1345 | goto default_label; |
| 1346 | else |
| 1347 | { |
| 1348 | Lisp_Object value; |
| 1349 | |
| 1350 | new_backquote_flag = 1; |
| 1351 | value = read0 (readcharfun); |
| 1352 | new_backquote_flag = 0; |
| 1353 | |
| 1354 | return Fcons (Qbackquote, Fcons (value, Qnil)); |
| 1355 | } |
| 1356 | |
| 1357 | case ',': |
| 1358 | if (new_backquote_flag) |
| 1359 | { |
| 1360 | Lisp_Object comma_type = Qnil; |
| 1361 | Lisp_Object value; |
| 1362 | int ch = READCHAR; |
| 1363 | |
| 1364 | if (ch == '@') |
| 1365 | comma_type = Qcomma_at; |
| 1366 | else if (ch == '.') |
| 1367 | comma_type = Qcomma_dot; |
| 1368 | else |
| 1369 | { |
| 1370 | if (ch >= 0) UNREAD (ch); |
| 1371 | comma_type = Qcomma; |
| 1372 | } |
| 1373 | |
| 1374 | new_backquote_flag = 0; |
| 1375 | value = read0 (readcharfun); |
| 1376 | new_backquote_flag = 1; |
| 1377 | return Fcons (comma_type, Fcons (value, Qnil)); |
| 1378 | } |
| 1379 | else |
| 1380 | goto default_label; |
| 1381 | |
| 1382 | case '?': |
| 1383 | { |
| 1384 | register Lisp_Object val; |
| 1385 | |
| 1386 | c = READCHAR; |
| 1387 | if (c < 0) return Fsignal (Qend_of_file, Qnil); |
| 1388 | |
| 1389 | if (c == '\\') |
| 1390 | XSETINT (val, read_escape (readcharfun)); |
| 1391 | else |
| 1392 | XSETINT (val, c); |
| 1393 | |
| 1394 | return val; |
| 1395 | } |
| 1396 | |
| 1397 | case '\"': |
| 1398 | { |
| 1399 | register char *p = read_buffer; |
| 1400 | register char *end = read_buffer + read_buffer_size; |
| 1401 | register int c; |
| 1402 | int cancel = 0; |
| 1403 | |
| 1404 | while ((c = READCHAR) >= 0 |
| 1405 | && c != '\"') |
| 1406 | { |
| 1407 | if (p == end) |
| 1408 | { |
| 1409 | char *new = (char *) xrealloc (read_buffer, read_buffer_size *= 2); |
| 1410 | p += new - read_buffer; |
| 1411 | read_buffer += new - read_buffer; |
| 1412 | end = read_buffer + read_buffer_size; |
| 1413 | } |
| 1414 | if (c == '\\') |
| 1415 | c = read_escape (readcharfun); |
| 1416 | /* c is -1 if \ newline has just been seen */ |
| 1417 | if (c == -1) |
| 1418 | { |
| 1419 | if (p == read_buffer) |
| 1420 | cancel = 1; |
| 1421 | } |
| 1422 | else |
| 1423 | { |
| 1424 | /* Allow `\C- ' and `\C-?'. */ |
| 1425 | if (c == (CHAR_CTL | ' ')) |
| 1426 | c = 0; |
| 1427 | else if (c == (CHAR_CTL | '?')) |
| 1428 | c = 127; |
| 1429 | |
| 1430 | if (c & CHAR_META) |
| 1431 | /* Move the meta bit to the right place for a string. */ |
| 1432 | c = (c & ~CHAR_META) | 0x80; |
| 1433 | if (c & ~0xff) |
| 1434 | error ("Invalid modifier in string"); |
| 1435 | *p++ = c; |
| 1436 | } |
| 1437 | } |
| 1438 | if (c < 0) return Fsignal (Qend_of_file, Qnil); |
| 1439 | |
| 1440 | /* If purifying, and string starts with \ newline, |
| 1441 | return zero instead. This is for doc strings |
| 1442 | that we are really going to find in etc/DOC.nn.nn */ |
| 1443 | if (!NILP (Vpurify_flag) && NILP (Vdoc_file_name) && cancel) |
| 1444 | return make_number (0); |
| 1445 | |
| 1446 | if (read_pure) |
| 1447 | return make_pure_string (read_buffer, p - read_buffer); |
| 1448 | else |
| 1449 | return make_string (read_buffer, p - read_buffer); |
| 1450 | } |
| 1451 | |
| 1452 | case '.': |
| 1453 | { |
| 1454 | #ifdef LISP_FLOAT_TYPE |
| 1455 | /* If a period is followed by a number, then we should read it |
| 1456 | as a floating point number. Otherwise, it denotes a dotted |
| 1457 | pair. */ |
| 1458 | int next_char = READCHAR; |
| 1459 | UNREAD (next_char); |
| 1460 | |
| 1461 | if (! (next_char >= '0' && next_char <= '9')) |
| 1462 | #endif |
| 1463 | { |
| 1464 | *pch = c; |
| 1465 | return Qnil; |
| 1466 | } |
| 1467 | |
| 1468 | /* Otherwise, we fall through! Note that the atom-reading loop |
| 1469 | below will now loop at least once, assuring that we will not |
| 1470 | try to UNREAD two characters in a row. */ |
| 1471 | } |
| 1472 | default: |
| 1473 | default_label: |
| 1474 | if (c <= 040) goto retry; |
| 1475 | { |
| 1476 | register char *p = read_buffer; |
| 1477 | int quoted = 0; |
| 1478 | |
| 1479 | { |
| 1480 | register char *end = read_buffer + read_buffer_size; |
| 1481 | |
| 1482 | while (c > 040 && |
| 1483 | !(c == '\"' || c == '\'' || c == ';' || c == '?' |
| 1484 | || c == '(' || c == ')' |
| 1485 | #ifndef LISP_FLOAT_TYPE |
| 1486 | /* If we have floating-point support, then we need |
| 1487 | to allow <digits><dot><digits>. */ |
| 1488 | || c =='.' |
| 1489 | #endif /* not LISP_FLOAT_TYPE */ |
| 1490 | || c == '[' || c == ']' || c == '#' |
| 1491 | )) |
| 1492 | { |
| 1493 | if (p == end) |
| 1494 | { |
| 1495 | register char *new = (char *) xrealloc (read_buffer, read_buffer_size *= 2); |
| 1496 | p += new - read_buffer; |
| 1497 | read_buffer += new - read_buffer; |
| 1498 | end = read_buffer + read_buffer_size; |
| 1499 | } |
| 1500 | if (c == '\\') |
| 1501 | { |
| 1502 | c = READCHAR; |
| 1503 | quoted = 1; |
| 1504 | } |
| 1505 | *p++ = c; |
| 1506 | c = READCHAR; |
| 1507 | } |
| 1508 | |
| 1509 | if (p == end) |
| 1510 | { |
| 1511 | char *new = (char *) xrealloc (read_buffer, read_buffer_size *= 2); |
| 1512 | p += new - read_buffer; |
| 1513 | read_buffer += new - read_buffer; |
| 1514 | /* end = read_buffer + read_buffer_size; */ |
| 1515 | } |
| 1516 | *p = 0; |
| 1517 | if (c >= 0) |
| 1518 | UNREAD (c); |
| 1519 | } |
| 1520 | |
| 1521 | if (!quoted) |
| 1522 | { |
| 1523 | register char *p1; |
| 1524 | register Lisp_Object val; |
| 1525 | p1 = read_buffer; |
| 1526 | if (*p1 == '+' || *p1 == '-') p1++; |
| 1527 | /* Is it an integer? */ |
| 1528 | if (p1 != p) |
| 1529 | { |
| 1530 | while (p1 != p && (c = *p1) >= '0' && c <= '9') p1++; |
| 1531 | #ifdef LISP_FLOAT_TYPE |
| 1532 | /* Integers can have trailing decimal points. */ |
| 1533 | if (p1 > read_buffer && p1 < p && *p1 == '.') p1++; |
| 1534 | #endif |
| 1535 | if (p1 == p) |
| 1536 | /* It is an integer. */ |
| 1537 | { |
| 1538 | #ifdef LISP_FLOAT_TYPE |
| 1539 | if (p1[-1] == '.') |
| 1540 | p1[-1] = '\0'; |
| 1541 | #endif |
| 1542 | if (sizeof (int) == sizeof (EMACS_INT)) |
| 1543 | XSETINT (val, atoi (read_buffer)); |
| 1544 | else if (sizeof (long) == sizeof (EMACS_INT)) |
| 1545 | XSETINT (val, atol (read_buffer)); |
| 1546 | else |
| 1547 | abort (); |
| 1548 | return val; |
| 1549 | } |
| 1550 | } |
| 1551 | #ifdef LISP_FLOAT_TYPE |
| 1552 | if (isfloat_string (read_buffer)) |
| 1553 | return make_float (atof (read_buffer)); |
| 1554 | #endif |
| 1555 | } |
| 1556 | |
| 1557 | return intern (read_buffer); |
| 1558 | } |
| 1559 | } |
| 1560 | } |
| 1561 | \f |
| 1562 | #ifdef LISP_FLOAT_TYPE |
| 1563 | |
| 1564 | #define LEAD_INT 1 |
| 1565 | #define DOT_CHAR 2 |
| 1566 | #define TRAIL_INT 4 |
| 1567 | #define E_CHAR 8 |
| 1568 | #define EXP_INT 16 |
| 1569 | |
| 1570 | int |
| 1571 | isfloat_string (cp) |
| 1572 | register char *cp; |
| 1573 | { |
| 1574 | register state; |
| 1575 | |
| 1576 | state = 0; |
| 1577 | if (*cp == '+' || *cp == '-') |
| 1578 | cp++; |
| 1579 | |
| 1580 | if (*cp >= '0' && *cp <= '9') |
| 1581 | { |
| 1582 | state |= LEAD_INT; |
| 1583 | while (*cp >= '0' && *cp <= '9') |
| 1584 | cp++; |
| 1585 | } |
| 1586 | if (*cp == '.') |
| 1587 | { |
| 1588 | state |= DOT_CHAR; |
| 1589 | cp++; |
| 1590 | } |
| 1591 | if (*cp >= '0' && *cp <= '9') |
| 1592 | { |
| 1593 | state |= TRAIL_INT; |
| 1594 | while (*cp >= '0' && *cp <= '9') |
| 1595 | cp++; |
| 1596 | } |
| 1597 | if (*cp == 'e') |
| 1598 | { |
| 1599 | state |= E_CHAR; |
| 1600 | cp++; |
| 1601 | if (*cp == '+' || *cp == '-') |
| 1602 | cp++; |
| 1603 | } |
| 1604 | |
| 1605 | if (*cp >= '0' && *cp <= '9') |
| 1606 | { |
| 1607 | state |= EXP_INT; |
| 1608 | while (*cp >= '0' && *cp <= '9') |
| 1609 | cp++; |
| 1610 | } |
| 1611 | return (((*cp == 0) || (*cp == ' ') || (*cp == '\t') || (*cp == '\n') || (*cp == '\r') || (*cp == '\f')) |
| 1612 | && (state == (LEAD_INT|DOT_CHAR|TRAIL_INT) |
| 1613 | || state == (DOT_CHAR|TRAIL_INT) |
| 1614 | || state == (LEAD_INT|E_CHAR|EXP_INT) |
| 1615 | || state == (LEAD_INT|DOT_CHAR|TRAIL_INT|E_CHAR|EXP_INT) |
| 1616 | || state == (DOT_CHAR|TRAIL_INT|E_CHAR|EXP_INT))); |
| 1617 | } |
| 1618 | #endif /* LISP_FLOAT_TYPE */ |
| 1619 | \f |
| 1620 | static Lisp_Object |
| 1621 | read_vector (readcharfun) |
| 1622 | Lisp_Object readcharfun; |
| 1623 | { |
| 1624 | register int i; |
| 1625 | register int size; |
| 1626 | register Lisp_Object *ptr; |
| 1627 | register Lisp_Object tem, vector; |
| 1628 | register struct Lisp_Cons *otem; |
| 1629 | Lisp_Object len; |
| 1630 | |
| 1631 | tem = read_list (1, readcharfun); |
| 1632 | len = Flength (tem); |
| 1633 | vector = (read_pure ? make_pure_vector (XINT (len)) : Fmake_vector (len, Qnil)); |
| 1634 | |
| 1635 | |
| 1636 | size = XVECTOR (vector)->size; |
| 1637 | ptr = XVECTOR (vector)->contents; |
| 1638 | for (i = 0; i < size; i++) |
| 1639 | { |
| 1640 | ptr[i] = read_pure ? Fpurecopy (Fcar (tem)) : Fcar (tem); |
| 1641 | otem = XCONS (tem); |
| 1642 | tem = Fcdr (tem); |
| 1643 | free_cons (otem); |
| 1644 | } |
| 1645 | return vector; |
| 1646 | } |
| 1647 | |
| 1648 | /* flag = 1 means check for ] to terminate rather than ) and . |
| 1649 | flag = -1 means check for starting with defun |
| 1650 | and make structure pure. */ |
| 1651 | |
| 1652 | static Lisp_Object |
| 1653 | read_list (flag, readcharfun) |
| 1654 | int flag; |
| 1655 | register Lisp_Object readcharfun; |
| 1656 | { |
| 1657 | /* -1 means check next element for defun, |
| 1658 | 0 means don't check, |
| 1659 | 1 means already checked and found defun. */ |
| 1660 | int defunflag = flag < 0 ? -1 : 0; |
| 1661 | Lisp_Object val, tail; |
| 1662 | register Lisp_Object elt, tem; |
| 1663 | struct gcpro gcpro1, gcpro2; |
| 1664 | /* 0 is the normal case. |
| 1665 | 1 means this list is a doc reference; replace it with the number 0. |
| 1666 | 2 means this list is a doc reference; replace it with the doc string. */ |
| 1667 | int doc_reference = 0; |
| 1668 | |
| 1669 | /* Initialize this to 1 if we are reading a list. */ |
| 1670 | int first_in_list = flag <= 0; |
| 1671 | |
| 1672 | val = Qnil; |
| 1673 | tail = Qnil; |
| 1674 | |
| 1675 | while (1) |
| 1676 | { |
| 1677 | char ch; |
| 1678 | GCPRO2 (val, tail); |
| 1679 | elt = read1 (readcharfun, &ch, first_in_list); |
| 1680 | UNGCPRO; |
| 1681 | |
| 1682 | first_in_list = 0; |
| 1683 | |
| 1684 | /* While building, if the list starts with #$, treat it specially. */ |
| 1685 | if (EQ (elt, Vload_file_name) |
| 1686 | && !NILP (Vpurify_flag)) |
| 1687 | { |
| 1688 | if (NILP (Vdoc_file_name)) |
| 1689 | /* We have not yet called Snarf-documentation, so assume |
| 1690 | this file is described in the DOC-MM.NN file |
| 1691 | and Snarf-documentation will fill in the right value later. |
| 1692 | For now, replace the whole list with 0. */ |
| 1693 | doc_reference = 1; |
| 1694 | else |
| 1695 | /* We have already called Snarf-documentation, so make a relative |
| 1696 | file name for this file, so it can be found properly |
| 1697 | in the installed Lisp directory. |
| 1698 | We don't use Fexpand_file_name because that would make |
| 1699 | the directory absolute now. */ |
| 1700 | elt = concat2 (build_string ("../lisp/"), |
| 1701 | Ffile_name_nondirectory (elt)); |
| 1702 | } |
| 1703 | else if (EQ (elt, Vload_file_name) |
| 1704 | && load_force_doc_strings) |
| 1705 | doc_reference = 2; |
| 1706 | |
| 1707 | if (ch) |
| 1708 | { |
| 1709 | if (flag > 0) |
| 1710 | { |
| 1711 | if (ch == ']') |
| 1712 | return val; |
| 1713 | Fsignal (Qinvalid_read_syntax, |
| 1714 | Fcons (make_string (") or . in a vector", 18), Qnil)); |
| 1715 | } |
| 1716 | if (ch == ')') |
| 1717 | return val; |
| 1718 | if (ch == '.') |
| 1719 | { |
| 1720 | GCPRO2 (val, tail); |
| 1721 | if (!NILP (tail)) |
| 1722 | XCONS (tail)->cdr = read0 (readcharfun); |
| 1723 | else |
| 1724 | val = read0 (readcharfun); |
| 1725 | read1 (readcharfun, &ch, 0); |
| 1726 | UNGCPRO; |
| 1727 | if (ch == ')') |
| 1728 | { |
| 1729 | if (doc_reference == 1) |
| 1730 | return make_number (0); |
| 1731 | if (doc_reference == 2) |
| 1732 | { |
| 1733 | /* Get a doc string from the file we are loading. |
| 1734 | If it's in saved_doc_string, get it from there. */ |
| 1735 | int pos = XINT (XCONS (val)->cdr); |
| 1736 | if (pos >= saved_doc_string_position |
| 1737 | && pos < (saved_doc_string_position |
| 1738 | + saved_doc_string_length)) |
| 1739 | { |
| 1740 | int start = pos - saved_doc_string_position; |
| 1741 | int from, to; |
| 1742 | |
| 1743 | /* Process quoting with ^A, |
| 1744 | and find the end of the string, |
| 1745 | which is marked with ^_ (037). */ |
| 1746 | for (from = start, to = start; |
| 1747 | saved_doc_string[from] != 037;) |
| 1748 | { |
| 1749 | int c = saved_doc_string[from++]; |
| 1750 | if (c == 1) |
| 1751 | { |
| 1752 | c = saved_doc_string[from++]; |
| 1753 | if (c == 1) |
| 1754 | saved_doc_string[to++] = c; |
| 1755 | else if (c == '0') |
| 1756 | saved_doc_string[to++] = 0; |
| 1757 | else if (c == '_') |
| 1758 | saved_doc_string[to++] = 037; |
| 1759 | } |
| 1760 | else |
| 1761 | saved_doc_string[to++] = c; |
| 1762 | } |
| 1763 | |
| 1764 | return make_string (saved_doc_string + start, |
| 1765 | to - start); |
| 1766 | } |
| 1767 | else |
| 1768 | return read_doc_string (val); |
| 1769 | } |
| 1770 | |
| 1771 | return val; |
| 1772 | } |
| 1773 | return Fsignal (Qinvalid_read_syntax, Fcons (make_string (". in wrong context", 18), Qnil)); |
| 1774 | } |
| 1775 | return Fsignal (Qinvalid_read_syntax, Fcons (make_string ("] in a list", 11), Qnil)); |
| 1776 | } |
| 1777 | tem = (read_pure && flag <= 0 |
| 1778 | ? pure_cons (elt, Qnil) |
| 1779 | : Fcons (elt, Qnil)); |
| 1780 | if (!NILP (tail)) |
| 1781 | XCONS (tail)->cdr = tem; |
| 1782 | else |
| 1783 | val = tem; |
| 1784 | tail = tem; |
| 1785 | if (defunflag < 0) |
| 1786 | defunflag = EQ (elt, Qdefun); |
| 1787 | else if (defunflag > 0) |
| 1788 | read_pure = 1; |
| 1789 | } |
| 1790 | } |
| 1791 | \f |
| 1792 | Lisp_Object Vobarray; |
| 1793 | Lisp_Object initial_obarray; |
| 1794 | |
| 1795 | /* oblookup stores the bucket number here, for the sake of Funintern. */ |
| 1796 | |
| 1797 | int oblookup_last_bucket_number; |
| 1798 | |
| 1799 | static int hash_string (); |
| 1800 | Lisp_Object oblookup (); |
| 1801 | |
| 1802 | /* Get an error if OBARRAY is not an obarray. |
| 1803 | If it is one, return it. */ |
| 1804 | |
| 1805 | Lisp_Object |
| 1806 | check_obarray (obarray) |
| 1807 | Lisp_Object obarray; |
| 1808 | { |
| 1809 | while (!VECTORP (obarray) || XVECTOR (obarray)->size == 0) |
| 1810 | { |
| 1811 | /* If Vobarray is now invalid, force it to be valid. */ |
| 1812 | if (EQ (Vobarray, obarray)) Vobarray = initial_obarray; |
| 1813 | |
| 1814 | obarray = wrong_type_argument (Qvectorp, obarray); |
| 1815 | } |
| 1816 | return obarray; |
| 1817 | } |
| 1818 | |
| 1819 | /* Intern the C string STR: return a symbol with that name, |
| 1820 | interned in the current obarray. */ |
| 1821 | |
| 1822 | Lisp_Object |
| 1823 | intern (str) |
| 1824 | char *str; |
| 1825 | { |
| 1826 | Lisp_Object tem; |
| 1827 | int len = strlen (str); |
| 1828 | Lisp_Object obarray; |
| 1829 | |
| 1830 | obarray = Vobarray; |
| 1831 | if (!VECTORP (obarray) || XVECTOR (obarray)->size == 0) |
| 1832 | obarray = check_obarray (obarray); |
| 1833 | tem = oblookup (obarray, str, len); |
| 1834 | if (SYMBOLP (tem)) |
| 1835 | return tem; |
| 1836 | return Fintern ((!NILP (Vpurify_flag) |
| 1837 | ? make_pure_string (str, len) |
| 1838 | : make_string (str, len)), |
| 1839 | obarray); |
| 1840 | } |
| 1841 | \f |
| 1842 | DEFUN ("intern", Fintern, Sintern, 1, 2, 0, |
| 1843 | "Return the canonical symbol whose name is STRING.\n\ |
| 1844 | If there is none, one is created by this function and returned.\n\ |
| 1845 | A second optional argument specifies the obarray to use;\n\ |
| 1846 | it defaults to the value of `obarray'.") |
| 1847 | (string, obarray) |
| 1848 | Lisp_Object string, obarray; |
| 1849 | { |
| 1850 | register Lisp_Object tem, sym, *ptr; |
| 1851 | |
| 1852 | if (NILP (obarray)) obarray = Vobarray; |
| 1853 | obarray = check_obarray (obarray); |
| 1854 | |
| 1855 | CHECK_STRING (string, 0); |
| 1856 | |
| 1857 | tem = oblookup (obarray, XSTRING (string)->data, XSTRING (string)->size); |
| 1858 | if (!INTEGERP (tem)) |
| 1859 | return tem; |
| 1860 | |
| 1861 | if (!NILP (Vpurify_flag)) |
| 1862 | string = Fpurecopy (string); |
| 1863 | sym = Fmake_symbol (string); |
| 1864 | |
| 1865 | ptr = &XVECTOR (obarray)->contents[XINT (tem)]; |
| 1866 | if (SYMBOLP (*ptr)) |
| 1867 | XSYMBOL (sym)->next = XSYMBOL (*ptr); |
| 1868 | else |
| 1869 | XSYMBOL (sym)->next = 0; |
| 1870 | *ptr = sym; |
| 1871 | return sym; |
| 1872 | } |
| 1873 | |
| 1874 | DEFUN ("intern-soft", Fintern_soft, Sintern_soft, 1, 2, 0, |
| 1875 | "Return the canonical symbol whose name is STRING, or nil if none exists.\n\ |
| 1876 | A second optional argument specifies the obarray to use;\n\ |
| 1877 | it defaults to the value of `obarray'.") |
| 1878 | (string, obarray) |
| 1879 | Lisp_Object string, obarray; |
| 1880 | { |
| 1881 | register Lisp_Object tem; |
| 1882 | |
| 1883 | if (NILP (obarray)) obarray = Vobarray; |
| 1884 | obarray = check_obarray (obarray); |
| 1885 | |
| 1886 | CHECK_STRING (string, 0); |
| 1887 | |
| 1888 | tem = oblookup (obarray, XSTRING (string)->data, XSTRING (string)->size); |
| 1889 | if (!INTEGERP (tem)) |
| 1890 | return tem; |
| 1891 | return Qnil; |
| 1892 | } |
| 1893 | \f |
| 1894 | DEFUN ("unintern", Funintern, Sunintern, 1, 2, 0, |
| 1895 | "Delete the symbol named NAME, if any, from OBARRAY.\n\ |
| 1896 | The value is t if a symbol was found and deleted, nil otherwise.\n\ |
| 1897 | NAME may be a string or a symbol. If it is a symbol, that symbol\n\ |
| 1898 | is deleted, if it belongs to OBARRAY--no other symbol is deleted.\n\ |
| 1899 | OBARRAY defaults to the value of the variable `obarray'.") |
| 1900 | (name, obarray) |
| 1901 | Lisp_Object name, obarray; |
| 1902 | { |
| 1903 | register Lisp_Object string, tem; |
| 1904 | int hash; |
| 1905 | |
| 1906 | if (NILP (obarray)) obarray = Vobarray; |
| 1907 | obarray = check_obarray (obarray); |
| 1908 | |
| 1909 | if (SYMBOLP (name)) |
| 1910 | XSETSTRING (string, XSYMBOL (name)->name); |
| 1911 | else |
| 1912 | { |
| 1913 | CHECK_STRING (name, 0); |
| 1914 | string = name; |
| 1915 | } |
| 1916 | |
| 1917 | tem = oblookup (obarray, XSTRING (string)->data, XSTRING (string)->size); |
| 1918 | if (INTEGERP (tem)) |
| 1919 | return Qnil; |
| 1920 | /* If arg was a symbol, don't delete anything but that symbol itself. */ |
| 1921 | if (SYMBOLP (name) && !EQ (name, tem)) |
| 1922 | return Qnil; |
| 1923 | |
| 1924 | hash = oblookup_last_bucket_number; |
| 1925 | |
| 1926 | if (EQ (XVECTOR (obarray)->contents[hash], tem)) |
| 1927 | { |
| 1928 | if (XSYMBOL (tem)->next) |
| 1929 | XSETSYMBOL (XVECTOR (obarray)->contents[hash], XSYMBOL (tem)->next); |
| 1930 | else |
| 1931 | XSETINT (XVECTOR (obarray)->contents[hash], 0); |
| 1932 | } |
| 1933 | else |
| 1934 | { |
| 1935 | Lisp_Object tail, following; |
| 1936 | |
| 1937 | for (tail = XVECTOR (obarray)->contents[hash]; |
| 1938 | XSYMBOL (tail)->next; |
| 1939 | tail = following) |
| 1940 | { |
| 1941 | XSETSYMBOL (following, XSYMBOL (tail)->next); |
| 1942 | if (EQ (following, tem)) |
| 1943 | { |
| 1944 | XSYMBOL (tail)->next = XSYMBOL (following)->next; |
| 1945 | break; |
| 1946 | } |
| 1947 | } |
| 1948 | } |
| 1949 | |
| 1950 | return Qt; |
| 1951 | } |
| 1952 | \f |
| 1953 | /* Return the symbol in OBARRAY whose names matches the string |
| 1954 | of SIZE characters at PTR. If there is no such symbol in OBARRAY, |
| 1955 | return nil. |
| 1956 | |
| 1957 | Also store the bucket number in oblookup_last_bucket_number. */ |
| 1958 | |
| 1959 | Lisp_Object |
| 1960 | oblookup (obarray, ptr, size) |
| 1961 | Lisp_Object obarray; |
| 1962 | register char *ptr; |
| 1963 | register int size; |
| 1964 | { |
| 1965 | int hash; |
| 1966 | int obsize; |
| 1967 | register Lisp_Object tail; |
| 1968 | Lisp_Object bucket, tem; |
| 1969 | |
| 1970 | if (!VECTORP (obarray) |
| 1971 | || (obsize = XVECTOR (obarray)->size) == 0) |
| 1972 | { |
| 1973 | obarray = check_obarray (obarray); |
| 1974 | obsize = XVECTOR (obarray)->size; |
| 1975 | } |
| 1976 | /* This is sometimes needed in the middle of GC. */ |
| 1977 | obsize &= ~ARRAY_MARK_FLAG; |
| 1978 | /* Combining next two lines breaks VMS C 2.3. */ |
| 1979 | hash = hash_string (ptr, size); |
| 1980 | hash %= obsize; |
| 1981 | bucket = XVECTOR (obarray)->contents[hash]; |
| 1982 | oblookup_last_bucket_number = hash; |
| 1983 | if (XFASTINT (bucket) == 0) |
| 1984 | ; |
| 1985 | else if (!SYMBOLP (bucket)) |
| 1986 | error ("Bad data in guts of obarray"); /* Like CADR error message */ |
| 1987 | else |
| 1988 | for (tail = bucket; ; XSETSYMBOL (tail, XSYMBOL (tail)->next)) |
| 1989 | { |
| 1990 | if (XSYMBOL (tail)->name->size == size |
| 1991 | && !bcmp (XSYMBOL (tail)->name->data, ptr, size)) |
| 1992 | return tail; |
| 1993 | else if (XSYMBOL (tail)->next == 0) |
| 1994 | break; |
| 1995 | } |
| 1996 | XSETINT (tem, hash); |
| 1997 | return tem; |
| 1998 | } |
| 1999 | |
| 2000 | static int |
| 2001 | hash_string (ptr, len) |
| 2002 | unsigned char *ptr; |
| 2003 | int len; |
| 2004 | { |
| 2005 | register unsigned char *p = ptr; |
| 2006 | register unsigned char *end = p + len; |
| 2007 | register unsigned char c; |
| 2008 | register int hash = 0; |
| 2009 | |
| 2010 | while (p != end) |
| 2011 | { |
| 2012 | c = *p++; |
| 2013 | if (c >= 0140) c -= 40; |
| 2014 | hash = ((hash<<3) + (hash>>28) + c); |
| 2015 | } |
| 2016 | return hash & 07777777777; |
| 2017 | } |
| 2018 | \f |
| 2019 | void |
| 2020 | map_obarray (obarray, fn, arg) |
| 2021 | Lisp_Object obarray; |
| 2022 | int (*fn) (); |
| 2023 | Lisp_Object arg; |
| 2024 | { |
| 2025 | register int i; |
| 2026 | register Lisp_Object tail; |
| 2027 | CHECK_VECTOR (obarray, 1); |
| 2028 | for (i = XVECTOR (obarray)->size - 1; i >= 0; i--) |
| 2029 | { |
| 2030 | tail = XVECTOR (obarray)->contents[i]; |
| 2031 | if (XFASTINT (tail) != 0) |
| 2032 | while (1) |
| 2033 | { |
| 2034 | (*fn) (tail, arg); |
| 2035 | if (XSYMBOL (tail)->next == 0) |
| 2036 | break; |
| 2037 | XSETSYMBOL (tail, XSYMBOL (tail)->next); |
| 2038 | } |
| 2039 | } |
| 2040 | } |
| 2041 | |
| 2042 | mapatoms_1 (sym, function) |
| 2043 | Lisp_Object sym, function; |
| 2044 | { |
| 2045 | call1 (function, sym); |
| 2046 | } |
| 2047 | |
| 2048 | DEFUN ("mapatoms", Fmapatoms, Smapatoms, 1, 2, 0, |
| 2049 | "Call FUNCTION on every symbol in OBARRAY.\n\ |
| 2050 | OBARRAY defaults to the value of `obarray'.") |
| 2051 | (function, obarray) |
| 2052 | Lisp_Object function, obarray; |
| 2053 | { |
| 2054 | Lisp_Object tem; |
| 2055 | |
| 2056 | if (NILP (obarray)) obarray = Vobarray; |
| 2057 | obarray = check_obarray (obarray); |
| 2058 | |
| 2059 | map_obarray (obarray, mapatoms_1, function); |
| 2060 | return Qnil; |
| 2061 | } |
| 2062 | |
| 2063 | #define OBARRAY_SIZE 1511 |
| 2064 | |
| 2065 | void |
| 2066 | init_obarray () |
| 2067 | { |
| 2068 | Lisp_Object oblength; |
| 2069 | int hash; |
| 2070 | Lisp_Object *tem; |
| 2071 | |
| 2072 | XSETFASTINT (oblength, OBARRAY_SIZE); |
| 2073 | |
| 2074 | Qnil = Fmake_symbol (make_pure_string ("nil", 3)); |
| 2075 | Vobarray = Fmake_vector (oblength, make_number (0)); |
| 2076 | initial_obarray = Vobarray; |
| 2077 | staticpro (&initial_obarray); |
| 2078 | /* Intern nil in the obarray */ |
| 2079 | /* These locals are to kludge around a pyramid compiler bug. */ |
| 2080 | hash = hash_string ("nil", 3); |
| 2081 | /* Separate statement here to avoid VAXC bug. */ |
| 2082 | hash %= OBARRAY_SIZE; |
| 2083 | tem = &XVECTOR (Vobarray)->contents[hash]; |
| 2084 | *tem = Qnil; |
| 2085 | |
| 2086 | Qunbound = Fmake_symbol (make_pure_string ("unbound", 7)); |
| 2087 | XSYMBOL (Qnil)->function = Qunbound; |
| 2088 | XSYMBOL (Qunbound)->value = Qunbound; |
| 2089 | XSYMBOL (Qunbound)->function = Qunbound; |
| 2090 | |
| 2091 | Qt = intern ("t"); |
| 2092 | XSYMBOL (Qnil)->value = Qnil; |
| 2093 | XSYMBOL (Qnil)->plist = Qnil; |
| 2094 | XSYMBOL (Qt)->value = Qt; |
| 2095 | |
| 2096 | /* Qt is correct even if CANNOT_DUMP. loadup.el will set to nil at end. */ |
| 2097 | Vpurify_flag = Qt; |
| 2098 | |
| 2099 | Qvariable_documentation = intern ("variable-documentation"); |
| 2100 | |
| 2101 | read_buffer_size = 100; |
| 2102 | read_buffer = (char *) malloc (read_buffer_size); |
| 2103 | } |
| 2104 | \f |
| 2105 | void |
| 2106 | defsubr (sname) |
| 2107 | struct Lisp_Subr *sname; |
| 2108 | { |
| 2109 | Lisp_Object sym; |
| 2110 | sym = intern (sname->symbol_name); |
| 2111 | XSETSUBR (XSYMBOL (sym)->function, sname); |
| 2112 | } |
| 2113 | |
| 2114 | #ifdef NOTDEF /* use fset in subr.el now */ |
| 2115 | void |
| 2116 | defalias (sname, string) |
| 2117 | struct Lisp_Subr *sname; |
| 2118 | char *string; |
| 2119 | { |
| 2120 | Lisp_Object sym; |
| 2121 | sym = intern (string); |
| 2122 | XSETSUBR (XSYMBOL (sym)->function, sname); |
| 2123 | } |
| 2124 | #endif /* NOTDEF */ |
| 2125 | |
| 2126 | /* Define an "integer variable"; a symbol whose value is forwarded |
| 2127 | to a C variable of type int. Sample call: */ |
| 2128 | /* DEFVAR_INT ("indent-tabs-mode", &indent_tabs_mode, "Documentation"); */ |
| 2129 | void |
| 2130 | defvar_int (namestring, address) |
| 2131 | char *namestring; |
| 2132 | int *address; |
| 2133 | { |
| 2134 | Lisp_Object sym, val; |
| 2135 | sym = intern (namestring); |
| 2136 | val = allocate_misc (); |
| 2137 | XMISCTYPE (val) = Lisp_Misc_Intfwd; |
| 2138 | XINTFWD (val)->intvar = address; |
| 2139 | XSYMBOL (sym)->value = val; |
| 2140 | } |
| 2141 | |
| 2142 | /* Similar but define a variable whose value is T if address contains 1, |
| 2143 | NIL if address contains 0 */ |
| 2144 | void |
| 2145 | defvar_bool (namestring, address) |
| 2146 | char *namestring; |
| 2147 | int *address; |
| 2148 | { |
| 2149 | Lisp_Object sym, val; |
| 2150 | sym = intern (namestring); |
| 2151 | val = allocate_misc (); |
| 2152 | XMISCTYPE (val) = Lisp_Misc_Boolfwd; |
| 2153 | XBOOLFWD (val)->boolvar = address; |
| 2154 | XSYMBOL (sym)->value = val; |
| 2155 | } |
| 2156 | |
| 2157 | /* Similar but define a variable whose value is the Lisp Object stored |
| 2158 | at address. Two versions: with and without gc-marking of the C |
| 2159 | variable. The nopro version is used when that variable will be |
| 2160 | gc-marked for some other reason, since marking the same slot twice |
| 2161 | can cause trouble with strings. */ |
| 2162 | void |
| 2163 | defvar_lisp_nopro (namestring, address) |
| 2164 | char *namestring; |
| 2165 | Lisp_Object *address; |
| 2166 | { |
| 2167 | Lisp_Object sym, val; |
| 2168 | sym = intern (namestring); |
| 2169 | val = allocate_misc (); |
| 2170 | XMISCTYPE (val) = Lisp_Misc_Objfwd; |
| 2171 | XOBJFWD (val)->objvar = address; |
| 2172 | XSYMBOL (sym)->value = val; |
| 2173 | } |
| 2174 | |
| 2175 | void |
| 2176 | defvar_lisp (namestring, address) |
| 2177 | char *namestring; |
| 2178 | Lisp_Object *address; |
| 2179 | { |
| 2180 | defvar_lisp_nopro (namestring, address); |
| 2181 | staticpro (address); |
| 2182 | } |
| 2183 | |
| 2184 | #ifndef standalone |
| 2185 | |
| 2186 | /* Similar but define a variable whose value is the Lisp Object stored in |
| 2187 | the current buffer. address is the address of the slot in the buffer |
| 2188 | that is current now. */ |
| 2189 | |
| 2190 | void |
| 2191 | defvar_per_buffer (namestring, address, type, doc) |
| 2192 | char *namestring; |
| 2193 | Lisp_Object *address; |
| 2194 | Lisp_Object type; |
| 2195 | char *doc; |
| 2196 | { |
| 2197 | Lisp_Object sym, val; |
| 2198 | int offset; |
| 2199 | extern struct buffer buffer_local_symbols; |
| 2200 | |
| 2201 | sym = intern (namestring); |
| 2202 | val = allocate_misc (); |
| 2203 | offset = (char *)address - (char *)current_buffer; |
| 2204 | |
| 2205 | XMISCTYPE (val) = Lisp_Misc_Buffer_Objfwd; |
| 2206 | XBUFFER_OBJFWD (val)->offset = offset; |
| 2207 | XSYMBOL (sym)->value = val; |
| 2208 | *(Lisp_Object *)(offset + (char *)&buffer_local_symbols) = sym; |
| 2209 | *(Lisp_Object *)(offset + (char *)&buffer_local_types) = type; |
| 2210 | if (XINT (*(Lisp_Object *)(offset + (char *)&buffer_local_flags)) == 0) |
| 2211 | /* Did a DEFVAR_PER_BUFFER without initializing the corresponding |
| 2212 | slot of buffer_local_flags */ |
| 2213 | abort (); |
| 2214 | } |
| 2215 | |
| 2216 | #endif /* standalone */ |
| 2217 | |
| 2218 | /* Similar but define a variable whose value is the Lisp Object stored |
| 2219 | at a particular offset in the current kboard object. */ |
| 2220 | |
| 2221 | void |
| 2222 | defvar_kboard (namestring, offset) |
| 2223 | char *namestring; |
| 2224 | int offset; |
| 2225 | { |
| 2226 | Lisp_Object sym, val; |
| 2227 | sym = intern (namestring); |
| 2228 | val = allocate_misc (); |
| 2229 | XMISCTYPE (val) = Lisp_Misc_Kboard_Objfwd; |
| 2230 | XKBOARD_OBJFWD (val)->offset = offset; |
| 2231 | XSYMBOL (sym)->value = val; |
| 2232 | } |
| 2233 | \f |
| 2234 | /* Record the value of load-path used at the start of dumping |
| 2235 | so we can see if the site changed it later during dumping. */ |
| 2236 | static Lisp_Object dump_path; |
| 2237 | |
| 2238 | init_lread () |
| 2239 | { |
| 2240 | char *normal; |
| 2241 | int turn_off_warning = 0; |
| 2242 | |
| 2243 | #ifdef HAVE_SETLOCALE |
| 2244 | /* Make sure numbers are parsed as we expect. */ |
| 2245 | setlocale (LC_NUMERIC, "C"); |
| 2246 | #endif /* HAVE_SETLOCALE */ |
| 2247 | |
| 2248 | /* Compute the default load-path. */ |
| 2249 | #ifdef CANNOT_DUMP |
| 2250 | normal = PATH_LOADSEARCH; |
| 2251 | Vload_path = decode_env_path (0, normal); |
| 2252 | #else |
| 2253 | if (NILP (Vpurify_flag)) |
| 2254 | normal = PATH_LOADSEARCH; |
| 2255 | else |
| 2256 | normal = PATH_DUMPLOADSEARCH; |
| 2257 | |
| 2258 | /* In a dumped Emacs, we normally have to reset the value of |
| 2259 | Vload_path from PATH_LOADSEARCH, since the value that was dumped |
| 2260 | uses ../lisp, instead of the path of the installed elisp |
| 2261 | libraries. However, if it appears that Vload_path was changed |
| 2262 | from the default before dumping, don't override that value. */ |
| 2263 | if (initialized) |
| 2264 | { |
| 2265 | if (! NILP (Fequal (dump_path, Vload_path))) |
| 2266 | { |
| 2267 | Vload_path = decode_env_path (0, normal); |
| 2268 | if (!NILP (Vinstallation_directory)) |
| 2269 | { |
| 2270 | /* Add to the path the lisp subdir of the |
| 2271 | installation dir, if it exists. */ |
| 2272 | Lisp_Object tem, tem1; |
| 2273 | tem = Fexpand_file_name (build_string ("lisp"), |
| 2274 | Vinstallation_directory); |
| 2275 | tem1 = Ffile_exists_p (tem); |
| 2276 | if (!NILP (tem1)) |
| 2277 | { |
| 2278 | if (NILP (Fmember (tem, Vload_path))) |
| 2279 | { |
| 2280 | turn_off_warning = 1; |
| 2281 | Vload_path = nconc2 (Vload_path, Fcons (tem, Qnil)); |
| 2282 | } |
| 2283 | } |
| 2284 | else |
| 2285 | /* That dir doesn't exist, so add the build-time |
| 2286 | Lisp dirs instead. */ |
| 2287 | Vload_path = nconc2 (Vload_path, dump_path); |
| 2288 | |
| 2289 | /* Add site-list under the installation dir, if it exists. */ |
| 2290 | tem = Fexpand_file_name (build_string ("site-lisp"), |
| 2291 | Vinstallation_directory); |
| 2292 | tem1 = Ffile_exists_p (tem); |
| 2293 | if (!NILP (tem1)) |
| 2294 | { |
| 2295 | if (NILP (Fmember (tem, Vload_path))) |
| 2296 | Vload_path = nconc2 (Vload_path, Fcons (tem, Qnil)); |
| 2297 | } |
| 2298 | } |
| 2299 | } |
| 2300 | } |
| 2301 | else |
| 2302 | { |
| 2303 | /* ../lisp refers to the build directory. |
| 2304 | NORMAL refers to the lisp dir in the source directory. */ |
| 2305 | Vload_path = Fcons (build_string ("../lisp"), |
| 2306 | decode_env_path (0, normal)); |
| 2307 | dump_path = Vload_path; |
| 2308 | } |
| 2309 | #endif |
| 2310 | |
| 2311 | #ifndef WINDOWSNT |
| 2312 | /* When Emacs is invoked over network shares on NT, PATH_LOADSEARCH is |
| 2313 | almost never correct, thereby causing a warning to be printed out that |
| 2314 | confuses users. Since PATH_LOADSEARCH is always overridden by the |
| 2315 | EMACSLOADPATH environment variable below, disable the warning on NT. */ |
| 2316 | |
| 2317 | /* Warn if dirs in the *standard* path don't exist. */ |
| 2318 | if (!turn_off_warning) |
| 2319 | { |
| 2320 | Lisp_Object path_tail; |
| 2321 | |
| 2322 | for (path_tail = Vload_path; |
| 2323 | !NILP (path_tail); |
| 2324 | path_tail = XCONS (path_tail)->cdr) |
| 2325 | { |
| 2326 | Lisp_Object dirfile; |
| 2327 | dirfile = Fcar (path_tail); |
| 2328 | if (STRINGP (dirfile)) |
| 2329 | { |
| 2330 | dirfile = Fdirectory_file_name (dirfile); |
| 2331 | if (access (XSTRING (dirfile)->data, 0) < 0) |
| 2332 | fprintf (stderr, |
| 2333 | "Warning: Lisp directory `%s' does not exist.\n", |
| 2334 | XSTRING (Fcar (path_tail))->data); |
| 2335 | } |
| 2336 | } |
| 2337 | } |
| 2338 | #endif /* WINDOWSNT */ |
| 2339 | |
| 2340 | /* If the EMACSLOADPATH environment variable is set, use its value. |
| 2341 | This doesn't apply if we're dumping. */ |
| 2342 | #ifndef CANNOT_DUMP |
| 2343 | if (NILP (Vpurify_flag) |
| 2344 | && egetenv ("EMACSLOADPATH")) |
| 2345 | #endif |
| 2346 | Vload_path = decode_env_path ("EMACSLOADPATH", normal); |
| 2347 | |
| 2348 | Vvalues = Qnil; |
| 2349 | |
| 2350 | load_in_progress = 0; |
| 2351 | |
| 2352 | load_descriptor_list = Qnil; |
| 2353 | } |
| 2354 | |
| 2355 | void |
| 2356 | syms_of_lread () |
| 2357 | { |
| 2358 | defsubr (&Sread); |
| 2359 | defsubr (&Sread_from_string); |
| 2360 | defsubr (&Sintern); |
| 2361 | defsubr (&Sintern_soft); |
| 2362 | defsubr (&Sunintern); |
| 2363 | defsubr (&Sload); |
| 2364 | defsubr (&Seval_buffer); |
| 2365 | defsubr (&Seval_region); |
| 2366 | defsubr (&Sread_char); |
| 2367 | defsubr (&Sread_char_exclusive); |
| 2368 | defsubr (&Sread_event); |
| 2369 | defsubr (&Sget_file_char); |
| 2370 | defsubr (&Smapatoms); |
| 2371 | |
| 2372 | DEFVAR_LISP ("obarray", &Vobarray, |
| 2373 | "Symbol table for use by `intern' and `read'.\n\ |
| 2374 | It is a vector whose length ought to be prime for best results.\n\ |
| 2375 | The vector's contents don't make sense if examined from Lisp programs;\n\ |
| 2376 | to find all the symbols in an obarray, use `mapatoms'."); |
| 2377 | |
| 2378 | DEFVAR_LISP ("values", &Vvalues, |
| 2379 | "List of values of all expressions which were read, evaluated and printed.\n\ |
| 2380 | Order is reverse chronological."); |
| 2381 | |
| 2382 | DEFVAR_LISP ("standard-input", &Vstandard_input, |
| 2383 | "Stream for read to get input from.\n\ |
| 2384 | See documentation of `read' for possible values."); |
| 2385 | Vstandard_input = Qt; |
| 2386 | |
| 2387 | DEFVAR_LISP ("load-path", &Vload_path, |
| 2388 | "*List of directories to search for files to load.\n\ |
| 2389 | Each element is a string (directory name) or nil (try default directory).\n\ |
| 2390 | Initialized based on EMACSLOADPATH environment variable, if any,\n\ |
| 2391 | otherwise to default specified by file `paths.h' when Emacs was built."); |
| 2392 | |
| 2393 | DEFVAR_BOOL ("load-in-progress", &load_in_progress, |
| 2394 | "Non-nil iff inside of `load'."); |
| 2395 | |
| 2396 | DEFVAR_LISP ("after-load-alist", &Vafter_load_alist, |
| 2397 | "An alist of expressions to be evalled when particular files are loaded.\n\ |
| 2398 | Each element looks like (FILENAME FORMS...).\n\ |
| 2399 | When `load' is run and the file-name argument is FILENAME,\n\ |
| 2400 | the FORMS in the corresponding element are executed at the end of loading.\n\n\ |
| 2401 | FILENAME must match exactly! Normally FILENAME is the name of a library,\n\ |
| 2402 | with no directory specified, since that is how `load' is normally called.\n\ |
| 2403 | An error in FORMS does not undo the load,\n\ |
| 2404 | but does prevent execution of the rest of the FORMS."); |
| 2405 | Vafter_load_alist = Qnil; |
| 2406 | |
| 2407 | DEFVAR_LISP ("load-history", &Vload_history, |
| 2408 | "Alist mapping source file names to symbols and features.\n\ |
| 2409 | Each alist element is a list that starts with a file name,\n\ |
| 2410 | except for one element (optional) that starts with nil and describes\n\ |
| 2411 | definitions evaluated from buffers not visiting files.\n\ |
| 2412 | The remaining elements of each list are symbols defined as functions\n\ |
| 2413 | or variables, and cons cells `(provide . FEATURE)' and `(require . FEATURE)'."); |
| 2414 | Vload_history = Qnil; |
| 2415 | |
| 2416 | DEFVAR_LISP ("load-file-name", &Vload_file_name, |
| 2417 | "Full name of file being loaded by `load'."); |
| 2418 | Vload_file_name = Qnil; |
| 2419 | |
| 2420 | DEFVAR_LISP ("current-load-list", &Vcurrent_load_list, |
| 2421 | "Used for internal purposes by `load'."); |
| 2422 | Vcurrent_load_list = Qnil; |
| 2423 | |
| 2424 | DEFVAR_LISP ("load-read-function", &Vload_read_function, |
| 2425 | "Function used by `load' and `eval-region' for reading expressions.\n\ |
| 2426 | The default is nil, which means use the function `read'."); |
| 2427 | Vload_read_function = Qnil; |
| 2428 | |
| 2429 | DEFVAR_BOOL ("load-force-doc-strings", &load_force_doc_strings, |
| 2430 | "Non-nil means `load' should force-load all dynamic doc strings.\n\ |
| 2431 | This is useful when the file being loaded is a temporary copy."); |
| 2432 | load_force_doc_strings = 0; |
| 2433 | |
| 2434 | DEFVAR_LISP ("source-directory", &Vsource_directory, |
| 2435 | "Directory in which Emacs sources were found when Emacs was built.\n\ |
| 2436 | You cannot count on them to still be there!"); |
| 2437 | Vsource_directory |
| 2438 | = Fexpand_file_name (build_string ("../"), |
| 2439 | Fcar (decode_env_path (0, PATH_DUMPLOADSEARCH))); |
| 2440 | |
| 2441 | /* Vsource_directory was initialized in init_lread. */ |
| 2442 | |
| 2443 | load_descriptor_list = Qnil; |
| 2444 | staticpro (&load_descriptor_list); |
| 2445 | |
| 2446 | Qcurrent_load_list = intern ("current-load-list"); |
| 2447 | staticpro (&Qcurrent_load_list); |
| 2448 | |
| 2449 | Qstandard_input = intern ("standard-input"); |
| 2450 | staticpro (&Qstandard_input); |
| 2451 | |
| 2452 | Qread_char = intern ("read-char"); |
| 2453 | staticpro (&Qread_char); |
| 2454 | |
| 2455 | Qget_file_char = intern ("get-file-char"); |
| 2456 | staticpro (&Qget_file_char); |
| 2457 | |
| 2458 | Qbackquote = intern ("`"); |
| 2459 | staticpro (&Qbackquote); |
| 2460 | Qcomma = intern (","); |
| 2461 | staticpro (&Qcomma); |
| 2462 | Qcomma_at = intern (",@"); |
| 2463 | staticpro (&Qcomma_at); |
| 2464 | Qcomma_dot = intern (",."); |
| 2465 | staticpro (&Qcomma_dot); |
| 2466 | |
| 2467 | Qascii_character = intern ("ascii-character"); |
| 2468 | staticpro (&Qascii_character); |
| 2469 | |
| 2470 | Qfunction = intern ("function"); |
| 2471 | staticpro (&Qfunction); |
| 2472 | |
| 2473 | Qload = intern ("load"); |
| 2474 | staticpro (&Qload); |
| 2475 | |
| 2476 | Qload_file_name = intern ("load-file-name"); |
| 2477 | staticpro (&Qload_file_name); |
| 2478 | |
| 2479 | staticpro (&dump_path); |
| 2480 | } |