Commit | Line | Data |
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0f2d19dd JB |
1 | /* Copyright (C) 1995,1996 Free Software Foundation, Inc. |
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 | |
15 | * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. | |
16 | * | |
17 | * As a special exception, the Free Software Foundation gives permission | |
18 | * for additional uses of the text contained in its release of GUILE. | |
19 | * | |
20 | * The exception is that, if you link the GUILE library with other files | |
21 | * to produce an executable, this does not by itself cause the | |
22 | * resulting executable to be covered by the GNU General Public License. | |
23 | * Your use of that executable is in no way restricted on account of | |
24 | * linking the GUILE library code into it. | |
25 | * | |
26 | * This exception does not however invalidate any other reasons why | |
27 | * the executable file might be covered by the GNU General Public License. | |
28 | * | |
29 | * This exception applies only to the code released by the | |
30 | * Free Software Foundation under the name GUILE. If you copy | |
31 | * code from other Free Software Foundation releases into a copy of | |
32 | * GUILE, as the General Public License permits, the exception does | |
33 | * not apply to the code that you add in this way. To avoid misleading | |
34 | * anyone as to the status of such modified files, you must delete | |
35 | * this exception notice from them. | |
36 | * | |
37 | * If you write modifications of your own for GUILE, it is your choice | |
38 | * whether to permit this exception to apply to your modifications. | |
39 | * If you do not wish that, delete this exception notice. | |
40 | */ | |
41 | \f | |
42 | ||
43 | #include "extchrs.h" | |
44 | #include <stdio.h> | |
45 | #include "_scm.h" | |
20e6290e JB |
46 | #include "chars.h" |
47 | #include "genio.h" | |
48 | #include "eval.h" | |
49 | #include "unif.h" | |
50 | #include "mbstrings.h" | |
51 | #include "kw.h" | |
52 | #include "alist.h" | |
09a4f039 MD |
53 | #include "srcprop.h" |
54 | #include "hashtab.h" | |
55 | #include "hash.h" | |
20e6290e | 56 | |
0f2d19dd JB |
57 | #include "read.h" |
58 | ||
59 | \f | |
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, | |
67 | "Convert symbols to lower case."} | |
a16f6fe7 MD |
68 | }; |
69 | ||
b7ff98dd | 70 | SCM_PROC (s_read_options, "read-options-interface", 0, 1, 0, scm_read_options); |
1cc91f1b | 71 | |
a16f6fe7 | 72 | SCM |
b7ff98dd MD |
73 | scm_read_options (setting) |
74 | SCM setting; | |
a16f6fe7 | 75 | { |
b7ff98dd MD |
76 | SCM ans = scm_options (setting, |
77 | scm_read_opts, | |
78 | SCM_N_READ_OPTIONS, | |
79 | s_read_options); | |
80 | if (SCM_COPY_SOURCE_P) | |
81 | SCM_RECORD_POSITIONS_P = 1; | |
a16f6fe7 MD |
82 | return ans; |
83 | } | |
a16f6fe7 | 84 | |
fed9c9a2 GH |
85 | /* CDR contains an association list mapping extra hash characters to |
86 | procedures. */ | |
87 | static SCM scm_read_hash_procedures; | |
deca31e1 GH |
88 | |
89 | SCM_PROC (s_read, "read", 0, 1, 0, scm_read); | |
1cc91f1b | 90 | |
0f2d19dd | 91 | SCM |
deca31e1 | 92 | scm_read (port) |
0f2d19dd | 93 | SCM port; |
0f2d19dd JB |
94 | { |
95 | int c; | |
09a4f039 | 96 | SCM tok_buf, copy; |
0f2d19dd JB |
97 | |
98 | if (SCM_UNBNDP (port)) | |
99 | port = scm_cur_inp; | |
100 | else | |
09a4f039 MD |
101 | SCM_ASSERT (SCM_NIMP (port) && SCM_OPINPORTP (port), |
102 | port, | |
103 | SCM_ARG1, | |
104 | s_read); | |
0f2d19dd | 105 | |
0f2d19dd JB |
106 | c = scm_flush_ws (port, (char *) NULL); |
107 | if (EOF == c) | |
108 | return SCM_EOF_VAL; | |
109 | scm_gen_ungetc (c, port); | |
110 | ||
111 | tok_buf = scm_makstr (30L, 0); | |
deca31e1 | 112 | return scm_lreadr (&tok_buf, port, ©); |
0f2d19dd JB |
113 | } |
114 | ||
115 | ||
1cc91f1b | 116 | |
0f2d19dd JB |
117 | char * |
118 | scm_grow_tok_buf (tok_buf) | |
119 | SCM * tok_buf; | |
0f2d19dd | 120 | { |
85ab9947 | 121 | scm_vector_set_length_x (*tok_buf, SCM_MAKINUM (2 * SCM_LENGTH (*tok_buf))); |
0f2d19dd JB |
122 | return SCM_CHARS (*tok_buf); |
123 | } | |
124 | ||
125 | ||
1cc91f1b | 126 | |
0f2d19dd JB |
127 | int |
128 | scm_flush_ws (port, eoferr) | |
129 | SCM port; | |
130 | char *eoferr; | |
0f2d19dd JB |
131 | { |
132 | register int c; | |
133 | while (1) | |
134 | switch (c = scm_gen_getc (port)) | |
135 | { | |
136 | case EOF: | |
137 | goteof: | |
138 | if (eoferr) | |
139 | scm_wta (SCM_UNDEFINED, "end of file in ", eoferr); | |
140 | return c; | |
141 | case ';': | |
142 | lp: | |
143 | switch (c = scm_gen_getc (port)) | |
144 | { | |
145 | case EOF: | |
146 | goto goteof; | |
147 | default: | |
148 | goto lp; | |
149 | case SCM_LINE_INCREMENTORS: | |
150 | break; | |
151 | } | |
152 | break; | |
153 | case SCM_LINE_INCREMENTORS: | |
0f2d19dd | 154 | case SCM_SINGLE_SPACES: |
0f2d19dd | 155 | case '\t': |
0f2d19dd JB |
156 | break; |
157 | default: | |
158 | return c; | |
159 | } | |
160 | } | |
161 | ||
162 | ||
1cc91f1b | 163 | |
0f2d19dd JB |
164 | int |
165 | scm_casei_streq (s1, s2) | |
166 | char * s1; | |
167 | char * s2; | |
0f2d19dd JB |
168 | { |
169 | while (*s1 && *s2) | |
170 | if (scm_downcase((int)*s1) != scm_downcase((int)*s2)) | |
171 | return 0; | |
172 | else | |
173 | { | |
174 | ++s1; | |
175 | ++s2; | |
176 | } | |
177 | return !(*s1 || *s2); | |
178 | } | |
179 | ||
180 | ||
09a4f039 MD |
181 | /* recsexpr is used when recording expressions |
182 | * constructed by read:sharp. | |
183 | */ | |
1cc91f1b JB |
184 | |
185 | static SCM recsexpr SCM_P ((SCM obj, int line, int column, SCM filename)); | |
186 | ||
09a4f039 MD |
187 | static SCM |
188 | recsexpr (obj, line, column, filename) | |
189 | SCM obj; | |
190 | int line; | |
191 | int column; | |
192 | SCM filename; | |
09a4f039 MD |
193 | { |
194 | if (SCM_IMP (obj) || SCM_NCONSP(obj)) | |
195 | return obj; | |
196 | { | |
197 | SCM tmp = obj, copy; | |
198 | /* If this sexpr is visible in the read:sharp source, we want to | |
199 | keep that information, so only record non-constant cons cells | |
200 | which haven't previously been read by the reader. */ | |
201 | if (SCM_FALSEP (scm_whash_lookup (scm_source_whash, obj))) | |
202 | { | |
203 | if (SCM_COPY_SOURCE_P) | |
204 | { | |
205 | copy = scm_cons (recsexpr (SCM_CAR (obj), line, column, filename), | |
206 | SCM_UNDEFINED); | |
207 | while (SCM_NIMP (tmp = SCM_CDR (tmp)) && SCM_CONSP (tmp)) | |
a6c64c3c MD |
208 | { |
209 | SCM_SETCDR (copy, scm_cons (recsexpr (SCM_CAR (tmp), | |
210 | line, | |
211 | column, | |
212 | filename), | |
213 | SCM_UNDEFINED)); | |
214 | copy = SCM_CDR (copy); | |
215 | } | |
216 | SCM_SETCDR (copy, tmp); | |
09a4f039 MD |
217 | } |
218 | else | |
219 | { | |
220 | recsexpr (SCM_CAR (obj), line, column, filename); | |
221 | while (SCM_NIMP (tmp = SCM_CDR (tmp)) && SCM_CONSP (tmp)) | |
222 | recsexpr (SCM_CAR (tmp), line, column, filename); | |
223 | copy = SCM_UNDEFINED; | |
224 | } | |
225 | scm_whash_insert (scm_source_whash, | |
226 | obj, | |
227 | scm_make_srcprops (line, | |
228 | column, | |
229 | filename, | |
230 | copy, | |
231 | SCM_EOL)); | |
232 | } | |
233 | return obj; | |
234 | } | |
235 | } | |
236 | ||
f9c68a47 JB |
237 | |
238 | /* Consume an SCSH-style block comment. Assume that we've already | |
239 | read the initial `#!', and eat characters until the matching `!#'. */ | |
240 | ||
241 | static void | |
242 | skip_scsh_block_comment (port) | |
243 | SCM port; | |
244 | { | |
245 | char last_c = '\0'; | |
246 | ||
247 | for (;;) | |
248 | { | |
249 | int c = scm_gen_getc (port); | |
250 | ||
251 | if (c == EOF) | |
252 | scm_wta (SCM_UNDEFINED, | |
253 | "unterminated `#! ... !#' comment", "read"); | |
254 | else if (c == '#' && last_c == '!') | |
255 | return; | |
256 | ||
257 | last_c = c; | |
258 | } | |
259 | } | |
260 | ||
deca31e1 GH |
261 | static SCM |
262 | scm_get_hash_procedure SCM_P ((int c)); | |
f9c68a47 | 263 | |
09a4f039 | 264 | static char s_list[]="list"; |
1cc91f1b | 265 | |
0f2d19dd | 266 | SCM |
deca31e1 | 267 | scm_lreadr (tok_buf, port, copy) |
09a4f039 | 268 | SCM *tok_buf; |
0f2d19dd | 269 | SCM port; |
09a4f039 | 270 | SCM *copy; |
0f2d19dd JB |
271 | { |
272 | int c; | |
273 | scm_sizet j; | |
274 | SCM p; | |
deca31e1 | 275 | |
0f2d19dd JB |
276 | tryagain: |
277 | c = scm_flush_ws (port, s_read); | |
b6356af7 | 278 | tryagain_no_flush_ws: |
0f2d19dd JB |
279 | switch (c) |
280 | { | |
281 | case EOF: | |
282 | return SCM_EOF_VAL; | |
283 | ||
284 | case '(': | |
09a4f039 | 285 | return SCM_RECORD_POSITIONS_P |
deca31e1 GH |
286 | ? scm_lreadrecparen (tok_buf, port, s_list, copy) |
287 | : scm_lreadparen (tok_buf, port, s_list, copy); | |
0f2d19dd JB |
288 | case ')': |
289 | scm_wta (SCM_UNDEFINED, "unexpected \")\"", "read"); | |
290 | goto tryagain; | |
291 | ||
292 | case '\'': | |
09a4f039 MD |
293 | p = scm_i_quote; |
294 | goto recquote; | |
0f2d19dd | 295 | case '`': |
09a4f039 MD |
296 | p = scm_i_quasiquote; |
297 | goto recquote; | |
0f2d19dd JB |
298 | case ',': |
299 | c = scm_gen_getc (port); | |
300 | if ('@' == c) | |
301 | p = scm_i_uq_splicing; | |
302 | else | |
303 | { | |
304 | scm_gen_ungetc (c, port); | |
305 | p = scm_i_unquote; | |
306 | } | |
09a4f039 MD |
307 | recquote: |
308 | p = scm_cons2 (p, | |
deca31e1 | 309 | scm_lreadr (tok_buf, port, copy), |
09a4f039 MD |
310 | SCM_EOL); |
311 | if (SCM_RECORD_POSITIONS_P) | |
312 | scm_whash_insert (scm_source_whash, | |
313 | p, | |
314 | scm_make_srcprops (SCM_LINUM (port), | |
315 | SCM_COL (port) - 1, | |
316 | SCM_FILENAME (port), | |
317 | SCM_COPY_SOURCE_P | |
318 | ? (*copy = scm_cons2 (SCM_CAR (p), | |
319 | SCM_CAR (SCM_CDR (p)), | |
320 | SCM_EOL)) | |
321 | : SCM_UNDEFINED, | |
322 | SCM_EOL)); | |
323 | return p; | |
0f2d19dd JB |
324 | case '#': |
325 | c = scm_gen_getc (port); | |
326 | switch (c) | |
327 | { | |
328 | case '(': | |
deca31e1 | 329 | p = scm_lreadparen (tok_buf, port, "vector", copy); |
0f2d19dd JB |
330 | return SCM_NULLP (p) ? scm_nullvect : scm_vector (p); |
331 | ||
332 | case 't': | |
333 | case 'T': | |
334 | return SCM_BOOL_T; | |
335 | case 'f': | |
336 | case 'F': | |
337 | return SCM_BOOL_F; | |
338 | ||
339 | case 'b': | |
340 | case 'B': | |
341 | case 'o': | |
342 | case 'O': | |
343 | case 'd': | |
344 | case 'D': | |
345 | case 'x': | |
346 | case 'X': | |
347 | case 'i': | |
348 | case 'I': | |
349 | case 'e': | |
350 | case 'E': | |
351 | scm_gen_ungetc (c, port); | |
352 | c = '#'; | |
353 | goto num; | |
354 | ||
f9c68a47 JB |
355 | case '!': |
356 | /* start of a shell script. Parse as a block comment, | |
357 | terminated by !#, just like SCSH. */ | |
358 | skip_scsh_block_comment (port); | |
b6356af7 MV |
359 | /* EOF is not an error here */ |
360 | c = scm_flush_ws (port, (char *)NULL); | |
361 | goto tryagain_no_flush_ws; | |
f9c68a47 | 362 | |
0f2d19dd | 363 | case '*': |
deca31e1 | 364 | j = scm_read_token (c, tok_buf, port, 0); |
0f2d19dd JB |
365 | p = scm_istr2bve (SCM_CHARS (*tok_buf) + 1, (long) (j - 1)); |
366 | if (SCM_NFALSEP (p)) | |
367 | return p; | |
368 | else | |
369 | goto unkshrp; | |
370 | ||
371 | case '{': | |
deca31e1 | 372 | j = scm_read_token (c, tok_buf, port, 1); |
0f2d19dd JB |
373 | p = scm_intern (SCM_CHARS (*tok_buf), j); |
374 | if (SCM_PORT_REPRESENTATION (port) != scm_regular_port) | |
375 | scm_set_symbol_multi_byte_x (SCM_CAR (p), SCM_BOOL_T); | |
376 | return SCM_CAR (p); | |
377 | ||
378 | case '\\': | |
379 | c = scm_gen_getc (port); | |
deca31e1 | 380 | j = scm_read_token (c, tok_buf, port, 0); |
0f2d19dd JB |
381 | if (j == 1) |
382 | return SCM_MAKICHR (c); | |
383 | if (c >= '0' && c < '8') | |
384 | { | |
385 | p = scm_istr2int (SCM_CHARS (*tok_buf), (long) j, 8); | |
386 | if (SCM_NFALSEP (p)) | |
387 | return SCM_MAKICHR (SCM_INUM (p)); | |
388 | } | |
389 | for (c = 0; c < scm_n_charnames; c++) | |
390 | if (scm_charnames[c] | |
391 | && (scm_casei_streq (scm_charnames[c], SCM_CHARS (*tok_buf)))) | |
392 | return SCM_MAKICHR (scm_charnums[c]); | |
393 | scm_wta (SCM_UNDEFINED, "unknown # object: #\\", SCM_CHARS (*tok_buf)); | |
394 | ||
395 | ||
396 | default: | |
397 | callshrp: | |
deca31e1 GH |
398 | { |
399 | SCM sharp = scm_get_hash_procedure (c); | |
400 | ||
401 | if (SCM_NIMP (sharp)) | |
402 | { | |
403 | int line = SCM_LINUM (port); | |
404 | int column = SCM_COL (port) - 2; | |
405 | SCM got; | |
406 | ||
407 | got = scm_apply (sharp, | |
408 | SCM_MAKICHR (c), | |
409 | scm_acons (port, SCM_EOL, SCM_EOL)); | |
410 | if (SCM_UNSPECIFIED == got) | |
411 | goto unkshrp; | |
412 | if (SCM_RECORD_POSITIONS_P) | |
413 | return *copy = recsexpr (got, line, column, | |
414 | SCM_FILENAME (port)); | |
415 | else | |
416 | return got; | |
417 | } | |
418 | } | |
03bc4386 GH |
419 | unkshrp: |
420 | scm_misc_error (s_read, "Unknown # object: %S", | |
421 | scm_listify (SCM_MAKICHR (c), SCM_UNDEFINED)); | |
0f2d19dd JB |
422 | } |
423 | ||
424 | case '"': | |
425 | j = 0; | |
426 | while ('"' != (c = scm_gen_getc (port))) | |
427 | { | |
428 | SCM_ASSERT (EOF != c, SCM_UNDEFINED, "end of file in ", "string"); | |
429 | ||
430 | while (j + sizeof(xwchar_t) + XMB_CUR_MAX >= SCM_LENGTH (*tok_buf)) | |
431 | scm_grow_tok_buf (tok_buf); | |
432 | ||
433 | if (c == '\\') | |
434 | switch (c = scm_gen_getc (port)) | |
435 | { | |
436 | case '\n': | |
437 | continue; | |
438 | case '0': | |
439 | c = '\0'; | |
440 | break; | |
441 | case 'f': | |
442 | c = '\f'; | |
443 | break; | |
444 | case 'n': | |
445 | c = '\n'; | |
446 | break; | |
447 | case 'r': | |
448 | c = '\r'; | |
449 | break; | |
450 | case 't': | |
451 | c = '\t'; | |
452 | break; | |
453 | case 'a': | |
454 | c = '\007'; | |
455 | break; | |
456 | case 'v': | |
457 | c = '\v'; | |
458 | break; | |
459 | } | |
460 | if (SCM_PORT_REPRESENTATION(port) == scm_regular_port) | |
461 | { | |
462 | SCM_CHARS (*tok_buf)[j] = c; | |
463 | ++j; | |
464 | } | |
465 | else | |
466 | { | |
467 | int len; | |
468 | len = xwctomb (SCM_CHARS (*tok_buf) + j, c); | |
469 | if (len == 0) | |
470 | len = 1; | |
471 | SCM_ASSERT (len > 0, SCM_MAKINUM (c), "bogus char", "read"); | |
472 | j += len; | |
473 | } | |
474 | } | |
475 | if (j == 0) | |
476 | return scm_nullstr; | |
477 | SCM_CHARS (*tok_buf)[j] = 0; | |
478 | { | |
479 | SCM str; | |
480 | str = scm_makfromstr (SCM_CHARS (*tok_buf), j, 0); | |
481 | if (SCM_PORT_REPRESENTATION(port) != scm_regular_port) | |
482 | { | |
483 | SCM_SETLENGTH (str, SCM_LENGTH (str), scm_tc7_mb_string); | |
484 | } | |
485 | return str; | |
486 | } | |
487 | ||
488 | case'0':case '1':case '2':case '3':case '4': | |
489 | case '5':case '6':case '7':case '8':case '9': | |
490 | case '.': | |
491 | case '-': | |
492 | case '+': | |
493 | num: | |
deca31e1 | 494 | j = scm_read_token (c, tok_buf, port, 0); |
0f2d19dd JB |
495 | p = scm_istring2number (SCM_CHARS (*tok_buf), (long) j, 10L); |
496 | if (SCM_NFALSEP (p)) | |
497 | return p; | |
498 | if (c == '#') | |
499 | { | |
500 | if ((j == 2) && (scm_gen_getc (port) == '(')) | |
501 | { | |
502 | scm_gen_ungetc ('(', port); | |
503 | c = SCM_CHARS (*tok_buf)[1]; | |
504 | goto callshrp; | |
505 | } | |
506 | scm_wta (SCM_UNDEFINED, "unknown # object", SCM_CHARS (*tok_buf)); | |
507 | } | |
508 | goto tok; | |
509 | ||
510 | case ':': | |
deca31e1 | 511 | j = scm_read_token ('-', tok_buf, port, 0); |
0f2d19dd JB |
512 | p = scm_intern (SCM_CHARS (*tok_buf), j); |
513 | if (SCM_PORT_REPRESENTATION (port) != scm_regular_port) | |
514 | scm_set_symbol_multi_byte_x (SCM_CAR (p), SCM_BOOL_T); | |
515 | return scm_make_keyword_from_dash_symbol (SCM_CAR (p)); | |
516 | ||
517 | default: | |
deca31e1 | 518 | j = scm_read_token (c, tok_buf, port, 0); |
0f2d19dd JB |
519 | /* fallthrough */ |
520 | ||
521 | tok: | |
522 | p = scm_intern (SCM_CHARS (*tok_buf), j); | |
523 | if (SCM_PORT_REPRESENTATION (port) != scm_regular_port) | |
524 | scm_set_symbol_multi_byte_x (SCM_CAR (p), SCM_BOOL_T); | |
525 | return SCM_CAR (p); | |
526 | } | |
527 | } | |
528 | ||
529 | #ifdef _UNICOS | |
530 | _Pragma ("noopt"); /* # pragma _CRI noopt */ | |
531 | #endif | |
1cc91f1b | 532 | |
0f2d19dd | 533 | scm_sizet |
deca31e1 | 534 | scm_read_token (ic, tok_buf, port, weird) |
0f2d19dd JB |
535 | int ic; |
536 | SCM *tok_buf; | |
537 | SCM port; | |
0f2d19dd | 538 | int weird; |
0f2d19dd JB |
539 | { |
540 | register scm_sizet j; | |
541 | register int c; | |
542 | register char *p; | |
543 | ||
deca31e1 | 544 | c = (SCM_CASE_INSENSITIVE_P ? scm_downcase(ic) : ic); |
0f2d19dd JB |
545 | p = SCM_CHARS (*tok_buf); |
546 | ||
547 | if (weird) | |
548 | j = 0; | |
549 | else | |
550 | { | |
551 | j = 0; | |
552 | while (j + sizeof(xwchar_t) + XMB_CUR_MAX >= SCM_LENGTH (*tok_buf)) | |
553 | p = scm_grow_tok_buf (tok_buf); | |
554 | if (SCM_PORT_REPRESENTATION(port) == scm_regular_port) | |
555 | { | |
556 | p[j] = c; | |
557 | ++j; | |
558 | } | |
559 | else | |
560 | { | |
561 | int len; | |
562 | len = xwctomb (p + j, c); | |
563 | if (len == 0) | |
564 | len = 1; | |
565 | SCM_ASSERT (len > 0, SCM_MAKINUM (c), "bogus char", "read"); | |
566 | j += len; | |
567 | } | |
568 | } | |
569 | ||
570 | while (1) | |
571 | { | |
572 | while (j + sizeof(xwchar_t) + XMB_CUR_MAX >= SCM_LENGTH (*tok_buf)) | |
573 | p = scm_grow_tok_buf (tok_buf); | |
574 | c = scm_gen_getc (port); | |
575 | switch (c) | |
576 | { | |
577 | case '(': | |
578 | case ')': | |
579 | case '"': | |
580 | case ';': | |
581 | case SCM_WHITE_SPACES: | |
582 | case SCM_LINE_INCREMENTORS: | |
583 | if (weird) | |
584 | goto default_case; | |
585 | ||
586 | scm_gen_ungetc (c, port); | |
587 | case EOF: | |
588 | eof_case: | |
589 | p[j] = 0; | |
590 | return j; | |
591 | case '\\': | |
592 | if (!weird) | |
593 | goto default_case; | |
594 | else | |
595 | { | |
596 | c = scm_gen_getc (port); | |
597 | if (c == EOF) | |
598 | goto eof_case; | |
599 | else | |
600 | goto default_case; | |
601 | } | |
602 | case '}': | |
603 | if (!weird) | |
604 | goto default_case; | |
605 | ||
606 | c = scm_gen_getc (port); | |
607 | if (c == '#') | |
608 | { | |
609 | p[j] = 0; | |
610 | return j; | |
611 | } | |
612 | else | |
613 | { | |
614 | scm_gen_ungetc (c, port); | |
615 | c = '}'; | |
616 | goto default_case; | |
617 | } | |
618 | ||
619 | default: | |
620 | default_case: | |
621 | { | |
deca31e1 | 622 | c = (SCM_CASE_INSENSITIVE_P ? scm_downcase(c) : c); |
0f2d19dd JB |
623 | if (SCM_PORT_REPRESENTATION(port) == scm_regular_port) |
624 | { | |
625 | p[j] = c; | |
626 | ++j; | |
627 | } | |
628 | else | |
629 | { | |
630 | int len; | |
631 | len = xwctomb (p + j, c); | |
632 | if (len == 0) | |
633 | len = 1; | |
634 | SCM_ASSERT (len > 0, SCM_MAKINUM (c), "bogus char", "read"); | |
635 | j += len; | |
636 | } | |
637 | } | |
638 | ||
639 | } | |
640 | } | |
641 | } | |
1cc91f1b | 642 | |
0f2d19dd JB |
643 | #ifdef _UNICOS |
644 | _Pragma ("opt"); /* # pragma _CRI opt */ | |
645 | #endif | |
646 | ||
0f2d19dd | 647 | SCM |
deca31e1 | 648 | scm_lreadparen (tok_buf, port, name, copy) |
0f2d19dd JB |
649 | SCM *tok_buf; |
650 | SCM port; | |
651 | char *name; | |
1cc91f1b | 652 | SCM *copy; |
0f2d19dd JB |
653 | { |
654 | SCM tmp; | |
655 | SCM tl; | |
656 | SCM ans; | |
657 | int c; | |
658 | ||
659 | c = scm_flush_ws (port, name); | |
660 | if (')' == c) | |
661 | return SCM_EOL; | |
662 | scm_gen_ungetc (c, port); | |
deca31e1 | 663 | if (scm_i_dot == (tmp = scm_lreadr (tok_buf, port, copy))) |
0f2d19dd | 664 | { |
deca31e1 | 665 | ans = scm_lreadr (tok_buf, port, copy); |
0f2d19dd JB |
666 | closeit: |
667 | if (')' != (c = scm_flush_ws (port, name))) | |
668 | scm_wta (SCM_UNDEFINED, "missing close paren", ""); | |
669 | return ans; | |
670 | } | |
671 | ans = tl = scm_cons (tmp, SCM_EOL); | |
672 | while (')' != (c = scm_flush_ws (port, name))) | |
673 | { | |
674 | scm_gen_ungetc (c, port); | |
deca31e1 | 675 | if (scm_i_dot == (tmp = scm_lreadr (tok_buf, port, copy))) |
0f2d19dd | 676 | { |
deca31e1 | 677 | SCM_SETCDR (tl, scm_lreadr (tok_buf, port, copy)); |
0f2d19dd JB |
678 | goto closeit; |
679 | } | |
a6c64c3c MD |
680 | SCM_SETCDR (tl, scm_cons (tmp, SCM_EOL)); |
681 | tl = SCM_CDR (tl); | |
0f2d19dd JB |
682 | } |
683 | return ans; | |
684 | } | |
685 | ||
1cc91f1b | 686 | |
09a4f039 | 687 | SCM |
deca31e1 | 688 | scm_lreadrecparen (tok_buf, port, name, copy) |
09a4f039 MD |
689 | SCM *tok_buf; |
690 | SCM port; | |
691 | char *name; | |
09a4f039 | 692 | SCM *copy; |
09a4f039 MD |
693 | { |
694 | register int c; | |
695 | register SCM tmp; | |
4dc2435a JB |
696 | register SCM tl, tl2 = SCM_EOL; |
697 | SCM ans, ans2 = SCM_EOL; | |
09a4f039 MD |
698 | /* Need to capture line and column numbers here. */ |
699 | int line = SCM_LINUM (port); | |
700 | int column = SCM_COL (port) - 1; | |
701 | ||
702 | c = scm_flush_ws (port, name); | |
703 | if (')' == c) | |
704 | return SCM_EOL; | |
705 | scm_gen_ungetc (c, port); | |
deca31e1 | 706 | if (scm_i_dot == (tmp = scm_lreadr (tok_buf, port, copy))) |
09a4f039 | 707 | { |
deca31e1 | 708 | ans = scm_lreadr (tok_buf, port, copy); |
09a4f039 MD |
709 | if (')' != (c = scm_flush_ws (port, name))) |
710 | scm_wta (SCM_UNDEFINED, "missing close paren", ""); | |
711 | return ans; | |
712 | } | |
713 | /* Build the head of the list structure. */ | |
714 | ans = tl = scm_cons (tmp, SCM_EOL); | |
715 | if (SCM_COPY_SOURCE_P) | |
716 | ans2 = tl2 = scm_cons (SCM_NIMP (tmp) && SCM_CONSP (tmp) | |
717 | ? *copy | |
718 | : tmp, | |
719 | SCM_EOL); | |
720 | while (')' != (c = scm_flush_ws (port, name))) | |
721 | { | |
722 | scm_gen_ungetc (c, port); | |
deca31e1 | 723 | if (scm_i_dot == (tmp = scm_lreadr (tok_buf, port, copy))) |
09a4f039 | 724 | { |
deca31e1 | 725 | SCM_SETCDR (tl, tmp = scm_lreadr (tok_buf, port, copy)); |
09a4f039 MD |
726 | if (SCM_COPY_SOURCE_P) |
727 | SCM_SETCDR (tl2, scm_cons (SCM_NIMP (tmp) && SCM_CONSP (tmp) | |
728 | ? *copy | |
729 | : tmp, | |
730 | SCM_EOL)); | |
731 | if (')' != (c = scm_flush_ws (port, name))) | |
732 | scm_wta (SCM_UNDEFINED, "missing close paren", ""); | |
733 | goto exit; | |
734 | } | |
735 | tl = SCM_SETCDR (tl, scm_cons (tmp, SCM_EOL)); | |
736 | if (SCM_COPY_SOURCE_P) | |
737 | tl2 = SCM_SETCDR (tl2, scm_cons (SCM_NIMP (tmp) && SCM_CONSP (tmp) | |
738 | ? *copy | |
739 | : tmp, | |
740 | SCM_EOL)); | |
741 | } | |
742 | exit: | |
743 | scm_whash_insert (scm_source_whash, | |
744 | ans, | |
745 | scm_make_srcprops (line, | |
746 | column, | |
747 | SCM_FILENAME (port), | |
748 | SCM_COPY_SOURCE_P | |
749 | ? *copy = ans2 | |
750 | : SCM_UNDEFINED, | |
751 | SCM_EOL)); | |
752 | return ans; | |
753 | } | |
754 | ||
0f2d19dd JB |
755 | |
756 | \f | |
757 | ||
deca31e1 GH |
758 | /* Register a procedure for extended # object processing and the character |
759 | that will trigger it. */ | |
760 | SCM_PROC (s_read_hash_extend, "read-hash-extend", 2, 0, 0, scm_read_hash_extend); | |
761 | SCM | |
762 | scm_read_hash_extend (chr, proc) | |
763 | SCM chr; | |
764 | SCM proc; | |
765 | { | |
fed9c9a2 GH |
766 | SCM this; |
767 | SCM prev; | |
768 | ||
deca31e1 | 769 | SCM_ASSERT (SCM_ICHRP(chr), chr, SCM_ARG1, s_read_hash_extend); |
fed9c9a2 GH |
770 | SCM_ASSERT (SCM_FALSEP (proc) || SCM_NIMP(proc), proc, SCM_ARG2, |
771 | s_read_hash_extend); | |
772 | ||
773 | /* See it this chr is already in the alist. */ | |
774 | this = SCM_CDR (scm_read_hash_procedures); | |
775 | prev = scm_read_hash_procedures; | |
776 | while (1) | |
777 | { | |
778 | if (SCM_NULLP (this)) | |
779 | { | |
780 | /* not found, so add it to the beginning. */ | |
781 | if (SCM_NFALSEP (proc)) | |
782 | { | |
783 | scm_set_cdr_x (scm_read_hash_procedures, | |
784 | scm_cons (scm_cons (chr, proc), | |
785 | SCM_CDR (scm_read_hash_procedures))); | |
786 | } | |
787 | break; | |
788 | } | |
789 | if (chr == SCM_CAAR (this)) | |
790 | { | |
791 | /* already in the alist. */ | |
792 | if (SCM_FALSEP (proc)) | |
793 | scm_set_cdr_x (prev, SCM_CDR (this)); /* remove it. */ | |
794 | else | |
795 | scm_set_cdr_x (SCM_CAR (this), proc); /* replace it. */ | |
796 | break; | |
797 | } | |
798 | prev = this; | |
799 | this = SCM_CDR (this); | |
800 | } | |
deca31e1 | 801 | |
deca31e1 GH |
802 | return SCM_UNSPECIFIED; |
803 | } | |
0f2d19dd | 804 | |
deca31e1 GH |
805 | /* Recover the read-hash procedure corresponding to char c. */ |
806 | static SCM | |
807 | scm_get_hash_procedure (c) | |
808 | int c; | |
809 | { | |
fed9c9a2 GH |
810 | SCM rest = SCM_CDR (scm_read_hash_procedures); |
811 | ||
deca31e1 GH |
812 | while (1) |
813 | { | |
814 | if (SCM_NULLP (rest)) | |
815 | return SCM_BOOL_F; | |
816 | ||
817 | if (SCM_ICHR (SCM_CAAR (rest)) == c) | |
818 | return SCM_CDAR (rest); | |
819 | ||
820 | rest = SCM_CDR (rest); | |
821 | } | |
822 | } | |
1cc91f1b | 823 | |
0f2d19dd JB |
824 | void |
825 | scm_init_read () | |
0f2d19dd | 826 | { |
fed9c9a2 GH |
827 | scm_read_hash_procedures = scm_cons (SCM_BOOL_F, SCM_EOL); |
828 | scm_permanent_object (scm_read_hash_procedures); | |
829 | ||
b7ff98dd | 830 | scm_init_opts (scm_read_options, scm_read_opts, SCM_N_READ_OPTIONS); |
0f2d19dd JB |
831 | #include "read.x" |
832 | } |