Commit | Line | Data |
---|---|---|
1e598865 | 1 | /* Copyright (C) 1995,1996,1997 Free Software Foundation, Inc. |
0f2d19dd JB |
2 | * |
3 | * This program is free software; you can redistribute it and/or modify | |
4 | * it under the terms of the GNU General Public License as published by | |
5 | * the Free Software Foundation; either version 2, or (at your option) | |
6 | * any later version. | |
7 | * | |
8 | * This program is distributed in the hope that it will be useful, | |
9 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
11 | * GNU General Public License for more details. | |
12 | * | |
13 | * You should have received a copy of the GNU General Public License | |
14 | * along with this software; see the file COPYING. If not, write to | |
82892bed JB |
15 | * the Free Software Foundation, Inc., 59 Temple Place, Suite 330, |
16 | * Boston, MA 02111-1307 USA | |
0f2d19dd JB |
17 | * |
18 | * As a special exception, the Free Software Foundation gives permission | |
19 | * for additional uses of the text contained in its release of GUILE. | |
20 | * | |
21 | * The exception is that, if you link the GUILE library with other files | |
22 | * to produce an executable, this does not by itself cause the | |
23 | * resulting executable to be covered by the GNU General Public License. | |
24 | * Your use of that executable is in no way restricted on account of | |
25 | * linking the GUILE library code into it. | |
26 | * | |
27 | * This exception does not however invalidate any other reasons why | |
28 | * the executable file might be covered by the GNU General Public License. | |
29 | * | |
30 | * This exception applies only to the code released by the | |
31 | * Free Software Foundation under the name GUILE. If you copy | |
32 | * code from other Free Software Foundation releases into a copy of | |
33 | * GUILE, as the General Public License permits, the exception does | |
34 | * not apply to the code that you add in this way. To avoid misleading | |
35 | * anyone as to the status of such modified files, you must delete | |
36 | * this exception notice from them. | |
37 | * | |
38 | * If you write modifications of your own for GUILE, it is your choice | |
39 | * whether to permit this exception to apply to your modifications. | |
82892bed | 40 | * If you do not wish that, delete this exception notice. */ |
0f2d19dd JB |
41 | \f |
42 | ||
0f2d19dd JB |
43 | #include <stdio.h> |
44 | #include "_scm.h" | |
20e6290e JB |
45 | #include "chars.h" |
46 | #include "genio.h" | |
47 | #include "eval.h" | |
48 | #include "unif.h" | |
547e65b5 | 49 | #include "keywords.h" |
20e6290e | 50 | #include "alist.h" |
09a4f039 MD |
51 | #include "srcprop.h" |
52 | #include "hashtab.h" | |
53 | #include "hash.h" | |
20e6290e | 54 | |
0f2d19dd JB |
55 | #include "read.h" |
56 | ||
57 | \f | |
58 | ||
c7733771 GH |
59 | SCM_SYMBOL (scm_keyword_prefix, "prefix"); |
60 | ||
a16f6fe7 | 61 | scm_option scm_read_opts[] = { |
b7ff98dd MD |
62 | { SCM_OPTION_BOOLEAN, "copy", 0, |
63 | "Copy source code expressions." }, | |
ac74fc22 | 64 | { SCM_OPTION_BOOLEAN, "positions", 0, |
deca31e1 GH |
65 | "Record positions of source code expressions." }, |
66 | { SCM_OPTION_BOOLEAN, "case-insensitive", 0, | |
c7733771 GH |
67 | "Convert symbols to lower case."}, |
68 | { SCM_OPTION_SCM, "keywords", SCM_BOOL_F, | |
69 | "Style of keyword recognition: #f or 'prefix"} | |
a16f6fe7 MD |
70 | }; |
71 | ||
b7ff98dd | 72 | SCM_PROC (s_read_options, "read-options-interface", 0, 1, 0, scm_read_options); |
1cc91f1b | 73 | |
a16f6fe7 | 74 | SCM |
b7ff98dd MD |
75 | scm_read_options (setting) |
76 | SCM setting; | |
a16f6fe7 | 77 | { |
b7ff98dd MD |
78 | SCM ans = scm_options (setting, |
79 | scm_read_opts, | |
80 | SCM_N_READ_OPTIONS, | |
81 | s_read_options); | |
82 | if (SCM_COPY_SOURCE_P) | |
83 | SCM_RECORD_POSITIONS_P = 1; | |
a16f6fe7 MD |
84 | return ans; |
85 | } | |
a16f6fe7 | 86 | |
14de3b42 GH |
87 | /* An association list mapping extra hash characters to procedures. */ |
88 | static SCM *scm_read_hash_procedures; | |
deca31e1 GH |
89 | |
90 | SCM_PROC (s_read, "read", 0, 1, 0, scm_read); | |
1cc91f1b | 91 | |
0f2d19dd | 92 | SCM |
deca31e1 | 93 | scm_read (port) |
0f2d19dd | 94 | SCM port; |
0f2d19dd JB |
95 | { |
96 | int c; | |
09a4f039 | 97 | SCM tok_buf, copy; |
0f2d19dd JB |
98 | |
99 | if (SCM_UNBNDP (port)) | |
100 | port = scm_cur_inp; | |
101 | else | |
09a4f039 MD |
102 | SCM_ASSERT (SCM_NIMP (port) && SCM_OPINPORTP (port), |
103 | port, | |
104 | SCM_ARG1, | |
105 | s_read); | |
0f2d19dd | 106 | |
0f2d19dd JB |
107 | c = scm_flush_ws (port, (char *) NULL); |
108 | if (EOF == c) | |
109 | return SCM_EOF_VAL; | |
b7f3516f | 110 | scm_ungetc (c, port); |
0f2d19dd JB |
111 | |
112 | tok_buf = scm_makstr (30L, 0); | |
deca31e1 | 113 | return scm_lreadr (&tok_buf, port, ©); |
0f2d19dd JB |
114 | } |
115 | ||
116 | ||
1cc91f1b | 117 | |
0f2d19dd JB |
118 | char * |
119 | scm_grow_tok_buf (tok_buf) | |
120 | SCM * tok_buf; | |
0f2d19dd | 121 | { |
85ab9947 | 122 | scm_vector_set_length_x (*tok_buf, SCM_MAKINUM (2 * SCM_LENGTH (*tok_buf))); |
0f2d19dd JB |
123 | return SCM_CHARS (*tok_buf); |
124 | } | |
125 | ||
126 | ||
1cc91f1b | 127 | |
0f2d19dd JB |
128 | int |
129 | scm_flush_ws (port, eoferr) | |
130 | SCM port; | |
3eeba8d4 | 131 | const char *eoferr; |
0f2d19dd JB |
132 | { |
133 | register int c; | |
134 | while (1) | |
b7f3516f | 135 | switch (c = scm_getc (port)) |
0f2d19dd JB |
136 | { |
137 | case EOF: | |
138 | goteof: | |
139 | if (eoferr) | |
140 | scm_wta (SCM_UNDEFINED, "end of file in ", eoferr); | |
141 | return c; | |
142 | case ';': | |
143 | lp: | |
b7f3516f | 144 | switch (c = scm_getc (port)) |
0f2d19dd JB |
145 | { |
146 | case EOF: | |
147 | goto goteof; | |
148 | default: | |
149 | goto lp; | |
150 | case SCM_LINE_INCREMENTORS: | |
151 | break; | |
152 | } | |
153 | break; | |
154 | case SCM_LINE_INCREMENTORS: | |
0f2d19dd | 155 | case SCM_SINGLE_SPACES: |
0f2d19dd | 156 | case '\t': |
0f2d19dd JB |
157 | break; |
158 | default: | |
159 | return c; | |
160 | } | |
161 | } | |
162 | ||
163 | ||
1cc91f1b | 164 | |
0f2d19dd JB |
165 | int |
166 | scm_casei_streq (s1, s2) | |
167 | char * s1; | |
168 | char * s2; | |
0f2d19dd JB |
169 | { |
170 | while (*s1 && *s2) | |
171 | if (scm_downcase((int)*s1) != scm_downcase((int)*s2)) | |
172 | return 0; | |
173 | else | |
174 | { | |
175 | ++s1; | |
176 | ++s2; | |
177 | } | |
178 | return !(*s1 || *s2); | |
179 | } | |
180 | ||
181 | ||
09a4f039 MD |
182 | /* recsexpr is used when recording expressions |
183 | * constructed by read:sharp. | |
184 | */ | |
604d4dd9 JB |
185 | #ifndef DEBUG_EXTENSIONS |
186 | #define recsexpr(obj, line, column, filename) (obj) | |
187 | #else | |
1cc91f1b JB |
188 | static SCM recsexpr SCM_P ((SCM obj, int line, int column, SCM filename)); |
189 | ||
09a4f039 MD |
190 | static SCM |
191 | recsexpr (obj, line, column, filename) | |
192 | SCM obj; | |
193 | int line; | |
194 | int column; | |
195 | SCM filename; | |
09a4f039 MD |
196 | { |
197 | if (SCM_IMP (obj) || SCM_NCONSP(obj)) | |
198 | return obj; | |
199 | { | |
200 | SCM tmp = obj, copy; | |
201 | /* If this sexpr is visible in the read:sharp source, we want to | |
202 | keep that information, so only record non-constant cons cells | |
203 | which haven't previously been read by the reader. */ | |
204 | if (SCM_FALSEP (scm_whash_lookup (scm_source_whash, obj))) | |
205 | { | |
206 | if (SCM_COPY_SOURCE_P) | |
207 | { | |
208 | copy = scm_cons (recsexpr (SCM_CAR (obj), line, column, filename), | |
209 | SCM_UNDEFINED); | |
210 | while (SCM_NIMP (tmp = SCM_CDR (tmp)) && SCM_CONSP (tmp)) | |
a6c64c3c MD |
211 | { |
212 | SCM_SETCDR (copy, scm_cons (recsexpr (SCM_CAR (tmp), | |
213 | line, | |
214 | column, | |
215 | filename), | |
216 | SCM_UNDEFINED)); | |
217 | copy = SCM_CDR (copy); | |
218 | } | |
219 | SCM_SETCDR (copy, tmp); | |
09a4f039 MD |
220 | } |
221 | else | |
222 | { | |
223 | recsexpr (SCM_CAR (obj), line, column, filename); | |
224 | while (SCM_NIMP (tmp = SCM_CDR (tmp)) && SCM_CONSP (tmp)) | |
225 | recsexpr (SCM_CAR (tmp), line, column, filename); | |
226 | copy = SCM_UNDEFINED; | |
227 | } | |
228 | scm_whash_insert (scm_source_whash, | |
229 | obj, | |
230 | scm_make_srcprops (line, | |
231 | column, | |
232 | filename, | |
233 | copy, | |
234 | SCM_EOL)); | |
235 | } | |
236 | return obj; | |
237 | } | |
238 | } | |
604d4dd9 | 239 | #endif |
f9c68a47 JB |
240 | |
241 | /* Consume an SCSH-style block comment. Assume that we've already | |
f9731264 JB |
242 | read the initial `#!', and eat characters until we get a |
243 | newline/exclamation-point/sharp-sign/newline sequence. */ | |
f9c68a47 JB |
244 | |
245 | static void | |
246 | skip_scsh_block_comment (port) | |
247 | SCM port; | |
248 | { | |
f9731264 JB |
249 | /* Is this portable? Dear God, spare me from the non-eight-bit |
250 | characters. But is it tasteful? */ | |
251 | long history = 0; | |
f9c68a47 JB |
252 | |
253 | for (;;) | |
254 | { | |
b7f3516f | 255 | int c = scm_getc (port); |
f9c68a47 JB |
256 | |
257 | if (c == EOF) | |
258 | scm_wta (SCM_UNDEFINED, | |
259 | "unterminated `#! ... !#' comment", "read"); | |
f9731264 | 260 | history = ((history << 8) | (c & 0xff)) & 0xffffffff; |
f9c68a47 | 261 | |
f9731264 JB |
262 | /* Were the last four characters read "\n!#\n"? */ |
263 | if (history == (('\n' << 24) | ('!' << 16) | ('#' << 8) | '\n')) | |
264 | return; | |
f9c68a47 JB |
265 | } |
266 | } | |
267 | ||
deca31e1 GH |
268 | static SCM |
269 | scm_get_hash_procedure SCM_P ((int c)); | |
f9c68a47 | 270 | |
09a4f039 | 271 | static char s_list[]="list"; |
1cc91f1b | 272 | |
0f2d19dd | 273 | SCM |
deca31e1 | 274 | scm_lreadr (tok_buf, port, copy) |
09a4f039 | 275 | SCM *tok_buf; |
0f2d19dd | 276 | SCM port; |
09a4f039 | 277 | SCM *copy; |
0f2d19dd JB |
278 | { |
279 | int c; | |
280 | scm_sizet j; | |
281 | SCM p; | |
deca31e1 | 282 | |
0f2d19dd JB |
283 | tryagain: |
284 | c = scm_flush_ws (port, s_read); | |
b6356af7 | 285 | tryagain_no_flush_ws: |
0f2d19dd JB |
286 | switch (c) |
287 | { | |
288 | case EOF: | |
289 | return SCM_EOF_VAL; | |
290 | ||
291 | case '(': | |
09a4f039 | 292 | return SCM_RECORD_POSITIONS_P |
deca31e1 GH |
293 | ? scm_lreadrecparen (tok_buf, port, s_list, copy) |
294 | : scm_lreadparen (tok_buf, port, s_list, copy); | |
0f2d19dd JB |
295 | case ')': |
296 | scm_wta (SCM_UNDEFINED, "unexpected \")\"", "read"); | |
297 | goto tryagain; | |
298 | ||
299 | case '\'': | |
09a4f039 MD |
300 | p = scm_i_quote; |
301 | goto recquote; | |
0f2d19dd | 302 | case '`': |
09a4f039 MD |
303 | p = scm_i_quasiquote; |
304 | goto recquote; | |
0f2d19dd | 305 | case ',': |
b7f3516f | 306 | c = scm_getc (port); |
0f2d19dd JB |
307 | if ('@' == c) |
308 | p = scm_i_uq_splicing; | |
309 | else | |
310 | { | |
b7f3516f | 311 | scm_ungetc (c, port); |
0f2d19dd JB |
312 | p = scm_i_unquote; |
313 | } | |
09a4f039 MD |
314 | recquote: |
315 | p = scm_cons2 (p, | |
deca31e1 | 316 | scm_lreadr (tok_buf, port, copy), |
09a4f039 MD |
317 | SCM_EOL); |
318 | if (SCM_RECORD_POSITIONS_P) | |
319 | scm_whash_insert (scm_source_whash, | |
320 | p, | |
321 | scm_make_srcprops (SCM_LINUM (port), | |
322 | SCM_COL (port) - 1, | |
323 | SCM_FILENAME (port), | |
324 | SCM_COPY_SOURCE_P | |
325 | ? (*copy = scm_cons2 (SCM_CAR (p), | |
326 | SCM_CAR (SCM_CDR (p)), | |
327 | SCM_EOL)) | |
328 | : SCM_UNDEFINED, | |
329 | SCM_EOL)); | |
330 | return p; | |
0f2d19dd | 331 | case '#': |
b7f3516f | 332 | c = scm_getc (port); |
0f2d19dd JB |
333 | switch (c) |
334 | { | |
335 | case '(': | |
deca31e1 | 336 | p = scm_lreadparen (tok_buf, port, "vector", copy); |
0f2d19dd JB |
337 | return SCM_NULLP (p) ? scm_nullvect : scm_vector (p); |
338 | ||
339 | case 't': | |
340 | case 'T': | |
341 | return SCM_BOOL_T; | |
342 | case 'f': | |
343 | case 'F': | |
344 | return SCM_BOOL_F; | |
345 | ||
346 | case 'b': | |
347 | case 'B': | |
348 | case 'o': | |
349 | case 'O': | |
350 | case 'd': | |
351 | case 'D': | |
352 | case 'x': | |
353 | case 'X': | |
354 | case 'i': | |
355 | case 'I': | |
356 | case 'e': | |
357 | case 'E': | |
b7f3516f | 358 | scm_ungetc (c, port); |
0f2d19dd JB |
359 | c = '#'; |
360 | goto num; | |
361 | ||
f9c68a47 JB |
362 | case '!': |
363 | /* start of a shell script. Parse as a block comment, | |
364 | terminated by !#, just like SCSH. */ | |
365 | skip_scsh_block_comment (port); | |
b6356af7 MV |
366 | /* EOF is not an error here */ |
367 | c = scm_flush_ws (port, (char *)NULL); | |
368 | goto tryagain_no_flush_ws; | |
f9c68a47 | 369 | |
0f2d19dd | 370 | case '*': |
deca31e1 | 371 | j = scm_read_token (c, tok_buf, port, 0); |
0f2d19dd JB |
372 | p = scm_istr2bve (SCM_CHARS (*tok_buf) + 1, (long) (j - 1)); |
373 | if (SCM_NFALSEP (p)) | |
374 | return p; | |
375 | else | |
376 | goto unkshrp; | |
377 | ||
378 | case '{': | |
deca31e1 | 379 | j = scm_read_token (c, tok_buf, port, 1); |
0f2d19dd | 380 | p = scm_intern (SCM_CHARS (*tok_buf), j); |
0f2d19dd JB |
381 | return SCM_CAR (p); |
382 | ||
383 | case '\\': | |
b7f3516f | 384 | c = scm_getc (port); |
deca31e1 | 385 | j = scm_read_token (c, tok_buf, port, 0); |
0f2d19dd JB |
386 | if (j == 1) |
387 | return SCM_MAKICHR (c); | |
388 | if (c >= '0' && c < '8') | |
389 | { | |
390 | p = scm_istr2int (SCM_CHARS (*tok_buf), (long) j, 8); | |
391 | if (SCM_NFALSEP (p)) | |
392 | return SCM_MAKICHR (SCM_INUM (p)); | |
393 | } | |
394 | for (c = 0; c < scm_n_charnames; c++) | |
395 | if (scm_charnames[c] | |
396 | && (scm_casei_streq (scm_charnames[c], SCM_CHARS (*tok_buf)))) | |
397 | return SCM_MAKICHR (scm_charnums[c]); | |
398 | scm_wta (SCM_UNDEFINED, "unknown # object: #\\", SCM_CHARS (*tok_buf)); | |
399 | ||
50a095f1 JB |
400 | /* #:SYMBOL is a syntax for keywords supported in all contexts. */ |
401 | case ':': | |
402 | j = scm_read_token ('-', tok_buf, port, 0); | |
403 | p = scm_intern (SCM_CHARS (*tok_buf), j); | |
50a095f1 | 404 | return scm_make_keyword_from_dash_symbol (SCM_CAR (p)); |
0f2d19dd JB |
405 | |
406 | default: | |
407 | callshrp: | |
deca31e1 GH |
408 | { |
409 | SCM sharp = scm_get_hash_procedure (c); | |
410 | ||
411 | if (SCM_NIMP (sharp)) | |
412 | { | |
413 | int line = SCM_LINUM (port); | |
414 | int column = SCM_COL (port) - 2; | |
415 | SCM got; | |
416 | ||
417 | got = scm_apply (sharp, | |
418 | SCM_MAKICHR (c), | |
419 | scm_acons (port, SCM_EOL, SCM_EOL)); | |
420 | if (SCM_UNSPECIFIED == got) | |
421 | goto unkshrp; | |
422 | if (SCM_RECORD_POSITIONS_P) | |
423 | return *copy = recsexpr (got, line, column, | |
424 | SCM_FILENAME (port)); | |
425 | else | |
426 | return got; | |
427 | } | |
428 | } | |
03bc4386 GH |
429 | unkshrp: |
430 | scm_misc_error (s_read, "Unknown # object: %S", | |
431 | scm_listify (SCM_MAKICHR (c), SCM_UNDEFINED)); | |
0f2d19dd JB |
432 | } |
433 | ||
434 | case '"': | |
435 | j = 0; | |
b7f3516f | 436 | while ('"' != (c = scm_getc (port))) |
0f2d19dd JB |
437 | { |
438 | SCM_ASSERT (EOF != c, SCM_UNDEFINED, "end of file in ", "string"); | |
439 | ||
b7f3516f | 440 | while (j + 2 >= SCM_LENGTH (*tok_buf)) |
0f2d19dd JB |
441 | scm_grow_tok_buf (tok_buf); |
442 | ||
443 | if (c == '\\') | |
b7f3516f | 444 | switch (c = scm_getc (port)) |
0f2d19dd JB |
445 | { |
446 | case '\n': | |
447 | continue; | |
448 | case '0': | |
449 | c = '\0'; | |
450 | break; | |
451 | case 'f': | |
452 | c = '\f'; | |
453 | break; | |
454 | case 'n': | |
455 | c = '\n'; | |
456 | break; | |
457 | case 'r': | |
458 | c = '\r'; | |
459 | break; | |
460 | case 't': | |
461 | c = '\t'; | |
462 | break; | |
463 | case 'a': | |
464 | c = '\007'; | |
465 | break; | |
466 | case 'v': | |
467 | c = '\v'; | |
468 | break; | |
469 | } | |
b7f3516f TT |
470 | SCM_CHARS (*tok_buf)[j] = c; |
471 | ++j; | |
0f2d19dd JB |
472 | } |
473 | if (j == 0) | |
474 | return scm_nullstr; | |
475 | SCM_CHARS (*tok_buf)[j] = 0; | |
476 | { | |
477 | SCM str; | |
478 | str = scm_makfromstr (SCM_CHARS (*tok_buf), j, 0); | |
0f2d19dd JB |
479 | return str; |
480 | } | |
481 | ||
482 | case'0':case '1':case '2':case '3':case '4': | |
483 | case '5':case '6':case '7':case '8':case '9': | |
484 | case '.': | |
485 | case '-': | |
486 | case '+': | |
487 | num: | |
deca31e1 | 488 | j = scm_read_token (c, tok_buf, port, 0); |
0f2d19dd JB |
489 | p = scm_istring2number (SCM_CHARS (*tok_buf), (long) j, 10L); |
490 | if (SCM_NFALSEP (p)) | |
491 | return p; | |
492 | if (c == '#') | |
493 | { | |
b7f3516f | 494 | if ((j == 2) && (scm_getc (port) == '(')) |
0f2d19dd | 495 | { |
b7f3516f | 496 | scm_ungetc ('(', port); |
0f2d19dd JB |
497 | c = SCM_CHARS (*tok_buf)[1]; |
498 | goto callshrp; | |
499 | } | |
500 | scm_wta (SCM_UNDEFINED, "unknown # object", SCM_CHARS (*tok_buf)); | |
501 | } | |
502 | goto tok; | |
503 | ||
504 | case ':': | |
c7733771 GH |
505 | if (SCM_KEYWORD_STYLE == scm_keyword_prefix) |
506 | { | |
507 | j = scm_read_token ('-', tok_buf, port, 0); | |
508 | p = scm_intern (SCM_CHARS (*tok_buf), j); | |
c7733771 GH |
509 | return scm_make_keyword_from_dash_symbol (SCM_CAR (p)); |
510 | } | |
511 | /* fallthrough */ | |
0f2d19dd | 512 | default: |
deca31e1 | 513 | j = scm_read_token (c, tok_buf, port, 0); |
0f2d19dd JB |
514 | /* fallthrough */ |
515 | ||
516 | tok: | |
517 | p = scm_intern (SCM_CHARS (*tok_buf), j); | |
0f2d19dd JB |
518 | return SCM_CAR (p); |
519 | } | |
520 | } | |
521 | ||
522 | #ifdef _UNICOS | |
523 | _Pragma ("noopt"); /* # pragma _CRI noopt */ | |
524 | #endif | |
1cc91f1b | 525 | |
0f2d19dd | 526 | scm_sizet |
deca31e1 | 527 | scm_read_token (ic, tok_buf, port, weird) |
0f2d19dd JB |
528 | int ic; |
529 | SCM *tok_buf; | |
530 | SCM port; | |
0f2d19dd | 531 | int weird; |
0f2d19dd JB |
532 | { |
533 | register scm_sizet j; | |
534 | register int c; | |
535 | register char *p; | |
536 | ||
deca31e1 | 537 | c = (SCM_CASE_INSENSITIVE_P ? scm_downcase(ic) : ic); |
0f2d19dd JB |
538 | p = SCM_CHARS (*tok_buf); |
539 | ||
540 | if (weird) | |
541 | j = 0; | |
542 | else | |
543 | { | |
544 | j = 0; | |
b7f3516f | 545 | while (j + 2 >= SCM_LENGTH (*tok_buf)) |
0f2d19dd | 546 | p = scm_grow_tok_buf (tok_buf); |
b7f3516f TT |
547 | p[j] = c; |
548 | ++j; | |
0f2d19dd JB |
549 | } |
550 | ||
551 | while (1) | |
552 | { | |
b7f3516f | 553 | while (j + 2 >= SCM_LENGTH (*tok_buf)) |
0f2d19dd | 554 | p = scm_grow_tok_buf (tok_buf); |
b7f3516f | 555 | c = scm_getc (port); |
0f2d19dd JB |
556 | switch (c) |
557 | { | |
558 | case '(': | |
559 | case ')': | |
560 | case '"': | |
561 | case ';': | |
562 | case SCM_WHITE_SPACES: | |
563 | case SCM_LINE_INCREMENTORS: | |
564 | if (weird) | |
565 | goto default_case; | |
566 | ||
b7f3516f | 567 | scm_ungetc (c, port); |
0f2d19dd JB |
568 | case EOF: |
569 | eof_case: | |
570 | p[j] = 0; | |
571 | return j; | |
572 | case '\\': | |
573 | if (!weird) | |
574 | goto default_case; | |
575 | else | |
576 | { | |
b7f3516f | 577 | c = scm_getc (port); |
0f2d19dd JB |
578 | if (c == EOF) |
579 | goto eof_case; | |
580 | else | |
581 | goto default_case; | |
582 | } | |
583 | case '}': | |
584 | if (!weird) | |
585 | goto default_case; | |
586 | ||
b7f3516f | 587 | c = scm_getc (port); |
0f2d19dd JB |
588 | if (c == '#') |
589 | { | |
590 | p[j] = 0; | |
591 | return j; | |
592 | } | |
593 | else | |
594 | { | |
b7f3516f | 595 | scm_ungetc (c, port); |
0f2d19dd JB |
596 | c = '}'; |
597 | goto default_case; | |
598 | } | |
599 | ||
600 | default: | |
601 | default_case: | |
602 | { | |
deca31e1 | 603 | c = (SCM_CASE_INSENSITIVE_P ? scm_downcase(c) : c); |
b7f3516f TT |
604 | p[j] = c; |
605 | ++j; | |
0f2d19dd JB |
606 | } |
607 | ||
608 | } | |
609 | } | |
610 | } | |
1cc91f1b | 611 | |
0f2d19dd JB |
612 | #ifdef _UNICOS |
613 | _Pragma ("opt"); /* # pragma _CRI opt */ | |
614 | #endif | |
615 | ||
0f2d19dd | 616 | SCM |
deca31e1 | 617 | scm_lreadparen (tok_buf, port, name, copy) |
0f2d19dd JB |
618 | SCM *tok_buf; |
619 | SCM port; | |
620 | char *name; | |
1cc91f1b | 621 | SCM *copy; |
0f2d19dd JB |
622 | { |
623 | SCM tmp; | |
624 | SCM tl; | |
625 | SCM ans; | |
626 | int c; | |
627 | ||
628 | c = scm_flush_ws (port, name); | |
629 | if (')' == c) | |
630 | return SCM_EOL; | |
b7f3516f | 631 | scm_ungetc (c, port); |
deca31e1 | 632 | if (scm_i_dot == (tmp = scm_lreadr (tok_buf, port, copy))) |
0f2d19dd | 633 | { |
deca31e1 | 634 | ans = scm_lreadr (tok_buf, port, copy); |
0f2d19dd JB |
635 | closeit: |
636 | if (')' != (c = scm_flush_ws (port, name))) | |
637 | scm_wta (SCM_UNDEFINED, "missing close paren", ""); | |
638 | return ans; | |
639 | } | |
640 | ans = tl = scm_cons (tmp, SCM_EOL); | |
641 | while (')' != (c = scm_flush_ws (port, name))) | |
642 | { | |
b7f3516f | 643 | scm_ungetc (c, port); |
deca31e1 | 644 | if (scm_i_dot == (tmp = scm_lreadr (tok_buf, port, copy))) |
0f2d19dd | 645 | { |
deca31e1 | 646 | SCM_SETCDR (tl, scm_lreadr (tok_buf, port, copy)); |
0f2d19dd JB |
647 | goto closeit; |
648 | } | |
a6c64c3c MD |
649 | SCM_SETCDR (tl, scm_cons (tmp, SCM_EOL)); |
650 | tl = SCM_CDR (tl); | |
0f2d19dd JB |
651 | } |
652 | return ans; | |
653 | } | |
654 | ||
1cc91f1b | 655 | |
09a4f039 | 656 | SCM |
deca31e1 | 657 | scm_lreadrecparen (tok_buf, port, name, copy) |
09a4f039 MD |
658 | SCM *tok_buf; |
659 | SCM port; | |
660 | char *name; | |
09a4f039 | 661 | SCM *copy; |
09a4f039 MD |
662 | { |
663 | register int c; | |
664 | register SCM tmp; | |
4dc2435a JB |
665 | register SCM tl, tl2 = SCM_EOL; |
666 | SCM ans, ans2 = SCM_EOL; | |
09a4f039 MD |
667 | /* Need to capture line and column numbers here. */ |
668 | int line = SCM_LINUM (port); | |
669 | int column = SCM_COL (port) - 1; | |
670 | ||
671 | c = scm_flush_ws (port, name); | |
672 | if (')' == c) | |
673 | return SCM_EOL; | |
b7f3516f | 674 | scm_ungetc (c, port); |
deca31e1 | 675 | if (scm_i_dot == (tmp = scm_lreadr (tok_buf, port, copy))) |
09a4f039 | 676 | { |
deca31e1 | 677 | ans = scm_lreadr (tok_buf, port, copy); |
09a4f039 MD |
678 | if (')' != (c = scm_flush_ws (port, name))) |
679 | scm_wta (SCM_UNDEFINED, "missing close paren", ""); | |
680 | return ans; | |
681 | } | |
682 | /* Build the head of the list structure. */ | |
683 | ans = tl = scm_cons (tmp, SCM_EOL); | |
684 | if (SCM_COPY_SOURCE_P) | |
685 | ans2 = tl2 = scm_cons (SCM_NIMP (tmp) && SCM_CONSP (tmp) | |
686 | ? *copy | |
687 | : tmp, | |
688 | SCM_EOL); | |
689 | while (')' != (c = scm_flush_ws (port, name))) | |
690 | { | |
b7f3516f | 691 | scm_ungetc (c, port); |
deca31e1 | 692 | if (scm_i_dot == (tmp = scm_lreadr (tok_buf, port, copy))) |
09a4f039 | 693 | { |
deca31e1 | 694 | SCM_SETCDR (tl, tmp = scm_lreadr (tok_buf, port, copy)); |
09a4f039 MD |
695 | if (SCM_COPY_SOURCE_P) |
696 | SCM_SETCDR (tl2, scm_cons (SCM_NIMP (tmp) && SCM_CONSP (tmp) | |
697 | ? *copy | |
698 | : tmp, | |
699 | SCM_EOL)); | |
700 | if (')' != (c = scm_flush_ws (port, name))) | |
701 | scm_wta (SCM_UNDEFINED, "missing close paren", ""); | |
702 | goto exit; | |
703 | } | |
704 | tl = SCM_SETCDR (tl, scm_cons (tmp, SCM_EOL)); | |
705 | if (SCM_COPY_SOURCE_P) | |
706 | tl2 = SCM_SETCDR (tl2, scm_cons (SCM_NIMP (tmp) && SCM_CONSP (tmp) | |
707 | ? *copy | |
708 | : tmp, | |
709 | SCM_EOL)); | |
710 | } | |
711 | exit: | |
712 | scm_whash_insert (scm_source_whash, | |
713 | ans, | |
714 | scm_make_srcprops (line, | |
715 | column, | |
716 | SCM_FILENAME (port), | |
717 | SCM_COPY_SOURCE_P | |
718 | ? *copy = ans2 | |
719 | : SCM_UNDEFINED, | |
720 | SCM_EOL)); | |
721 | return ans; | |
722 | } | |
723 | ||
0f2d19dd JB |
724 | |
725 | \f | |
726 | ||
14de3b42 GH |
727 | /* Manipulate the read-hash-procedures alist. This could be written in |
728 | Scheme, but maybe it will also be used by C code during initialisation. */ | |
deca31e1 GH |
729 | SCM_PROC (s_read_hash_extend, "read-hash-extend", 2, 0, 0, scm_read_hash_extend); |
730 | SCM | |
731 | scm_read_hash_extend (chr, proc) | |
732 | SCM chr; | |
733 | SCM proc; | |
734 | { | |
fed9c9a2 GH |
735 | SCM this; |
736 | SCM prev; | |
737 | ||
deca31e1 | 738 | SCM_ASSERT (SCM_ICHRP(chr), chr, SCM_ARG1, s_read_hash_extend); |
fed9c9a2 GH |
739 | SCM_ASSERT (SCM_FALSEP (proc) || SCM_NIMP(proc), proc, SCM_ARG2, |
740 | s_read_hash_extend); | |
741 | ||
14de3b42 GH |
742 | /* Check if chr is already in the alist. */ |
743 | this = *scm_read_hash_procedures; | |
744 | prev = SCM_BOOL_F; | |
fed9c9a2 GH |
745 | while (1) |
746 | { | |
747 | if (SCM_NULLP (this)) | |
748 | { | |
749 | /* not found, so add it to the beginning. */ | |
750 | if (SCM_NFALSEP (proc)) | |
751 | { | |
14de3b42 GH |
752 | *scm_read_hash_procedures = |
753 | scm_cons (scm_cons (chr, proc), *scm_read_hash_procedures); | |
fed9c9a2 GH |
754 | } |
755 | break; | |
756 | } | |
757 | if (chr == SCM_CAAR (this)) | |
758 | { | |
759 | /* already in the alist. */ | |
760 | if (SCM_FALSEP (proc)) | |
14de3b42 GH |
761 | { |
762 | /* remove it. */ | |
763 | if (prev == SCM_BOOL_F) | |
764 | { | |
765 | *scm_read_hash_procedures = | |
766 | SCM_CDR (*scm_read_hash_procedures); | |
767 | } | |
768 | else | |
769 | scm_set_cdr_x (prev, SCM_CDR (this)); | |
770 | } | |
fed9c9a2 | 771 | else |
14de3b42 GH |
772 | { |
773 | /* replace it. */ | |
774 | scm_set_cdr_x (SCM_CAR (this), proc); | |
775 | } | |
fed9c9a2 GH |
776 | break; |
777 | } | |
778 | prev = this; | |
779 | this = SCM_CDR (this); | |
780 | } | |
deca31e1 | 781 | |
deca31e1 GH |
782 | return SCM_UNSPECIFIED; |
783 | } | |
0f2d19dd | 784 | |
deca31e1 GH |
785 | /* Recover the read-hash procedure corresponding to char c. */ |
786 | static SCM | |
787 | scm_get_hash_procedure (c) | |
788 | int c; | |
789 | { | |
14de3b42 | 790 | SCM rest = *scm_read_hash_procedures; |
fed9c9a2 | 791 | |
deca31e1 GH |
792 | while (1) |
793 | { | |
794 | if (SCM_NULLP (rest)) | |
795 | return SCM_BOOL_F; | |
796 | ||
797 | if (SCM_ICHR (SCM_CAAR (rest)) == c) | |
798 | return SCM_CDAR (rest); | |
799 | ||
800 | rest = SCM_CDR (rest); | |
801 | } | |
802 | } | |
1cc91f1b | 803 | |
0f2d19dd JB |
804 | void |
805 | scm_init_read () | |
0f2d19dd | 806 | { |
14de3b42 GH |
807 | scm_read_hash_procedures = |
808 | SCM_CDRLOC (scm_sysintern ("read-hash-procedures", SCM_EOL)); | |
fed9c9a2 | 809 | |
b7ff98dd | 810 | scm_init_opts (scm_read_options, scm_read_opts, SCM_N_READ_OPTIONS); |
0f2d19dd JB |
811 | #include "read.x" |
812 | } |