Commit | Line | Data |
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4cc81ec6 | 1 | /* Copyright (C) 1995,1996,1997, 1999 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. */ |
1bbd0b84 GB |
41 | |
42 | /* Software engineering face-lift by Greg J. Badros, 11-Dec-1999, | |
43 | gjb@cs.washington.edu, http://www.cs.washington.edu/homes/gjb */ | |
44 | ||
0f2d19dd JB |
45 | \f |
46 | ||
0f2d19dd JB |
47 | #include <stdio.h> |
48 | #include "_scm.h" | |
20e6290e JB |
49 | #include "chars.h" |
50 | #include "genio.h" | |
51 | #include "eval.h" | |
52 | #include "unif.h" | |
547e65b5 | 53 | #include "keywords.h" |
20e6290e | 54 | #include "alist.h" |
09a4f039 MD |
55 | #include "srcprop.h" |
56 | #include "hashtab.h" | |
57 | #include "hash.h" | |
20e6290e | 58 | |
1bbd0b84 | 59 | #include "scm_validate.h" |
0f2d19dd JB |
60 | #include "read.h" |
61 | ||
62 | \f | |
63 | ||
c7733771 GH |
64 | SCM_SYMBOL (scm_keyword_prefix, "prefix"); |
65 | ||
a16f6fe7 | 66 | scm_option scm_read_opts[] = { |
b7ff98dd MD |
67 | { SCM_OPTION_BOOLEAN, "copy", 0, |
68 | "Copy source code expressions." }, | |
ac74fc22 | 69 | { SCM_OPTION_BOOLEAN, "positions", 0, |
deca31e1 GH |
70 | "Record positions of source code expressions." }, |
71 | { SCM_OPTION_BOOLEAN, "case-insensitive", 0, | |
c7733771 GH |
72 | "Convert symbols to lower case."}, |
73 | { SCM_OPTION_SCM, "keywords", SCM_BOOL_F, | |
74 | "Style of keyword recognition: #f or 'prefix"} | |
a16f6fe7 MD |
75 | }; |
76 | ||
1bbd0b84 GB |
77 | GUILE_PROC (scm_read_options, "read-options-interface", 0, 1, 0, |
78 | (SCM setting), | |
79 | "") | |
80 | #define FUNC_NAME s_scm_read_options | |
a16f6fe7 | 81 | { |
b7ff98dd MD |
82 | SCM ans = scm_options (setting, |
83 | scm_read_opts, | |
84 | SCM_N_READ_OPTIONS, | |
1bbd0b84 | 85 | FUNC_NAME); |
b7ff98dd MD |
86 | if (SCM_COPY_SOURCE_P) |
87 | SCM_RECORD_POSITIONS_P = 1; | |
a16f6fe7 MD |
88 | return ans; |
89 | } | |
1bbd0b84 | 90 | #undef FUNC_NAME |
a16f6fe7 | 91 | |
14de3b42 GH |
92 | /* An association list mapping extra hash characters to procedures. */ |
93 | static SCM *scm_read_hash_procedures; | |
deca31e1 | 94 | |
1bbd0b84 GB |
95 | GUILE_PROC (scm_read, "read", 0, 1, 0, |
96 | (SCM port), | |
97 | "") | |
98 | #define FUNC_NAME s_scm_read | |
0f2d19dd JB |
99 | { |
100 | int c; | |
09a4f039 | 101 | SCM tok_buf, copy; |
0f2d19dd JB |
102 | |
103 | if (SCM_UNBNDP (port)) | |
104 | port = scm_cur_inp; | |
1bbd0b84 | 105 | SCM_VALIDATE_OPINPORT(1,port); |
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 | 114 | } |
1bbd0b84 | 115 | #undef FUNC_NAME |
0f2d19dd JB |
116 | |
117 | ||
1cc91f1b | 118 | |
0f2d19dd | 119 | char * |
6e8d25a6 | 120 | scm_grow_tok_buf (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 | 128 | int |
6e8d25a6 | 129 | scm_flush_ws (SCM port, const char *eoferr) |
0f2d19dd JB |
130 | { |
131 | register int c; | |
132 | while (1) | |
b7f3516f | 133 | switch (c = scm_getc (port)) |
0f2d19dd JB |
134 | { |
135 | case EOF: | |
136 | goteof: | |
137 | if (eoferr) | |
138 | scm_wta (SCM_UNDEFINED, "end of file in ", eoferr); | |
139 | return c; | |
140 | case ';': | |
141 | lp: | |
b7f3516f | 142 | switch (c = scm_getc (port)) |
0f2d19dd JB |
143 | { |
144 | case EOF: | |
145 | goto goteof; | |
146 | default: | |
147 | goto lp; | |
148 | case SCM_LINE_INCREMENTORS: | |
149 | break; | |
150 | } | |
151 | break; | |
152 | case SCM_LINE_INCREMENTORS: | |
0f2d19dd | 153 | case SCM_SINGLE_SPACES: |
0f2d19dd | 154 | case '\t': |
0f2d19dd JB |
155 | break; |
156 | default: | |
157 | return c; | |
158 | } | |
159 | } | |
160 | ||
161 | ||
1cc91f1b | 162 | |
0f2d19dd | 163 | int |
6e8d25a6 | 164 | scm_casei_streq (char *s1, char *s2) |
0f2d19dd JB |
165 | { |
166 | while (*s1 && *s2) | |
167 | if (scm_downcase((int)*s1) != scm_downcase((int)*s2)) | |
168 | return 0; | |
169 | else | |
170 | { | |
171 | ++s1; | |
172 | ++s2; | |
173 | } | |
174 | return !(*s1 || *s2); | |
175 | } | |
176 | ||
177 | ||
09a4f039 MD |
178 | /* recsexpr is used when recording expressions |
179 | * constructed by read:sharp. | |
180 | */ | |
604d4dd9 JB |
181 | #ifndef DEBUG_EXTENSIONS |
182 | #define recsexpr(obj, line, column, filename) (obj) | |
183 | #else | |
09a4f039 | 184 | static SCM |
1bbd0b84 | 185 | recsexpr (SCM obj,int line,int column,SCM filename) |
09a4f039 MD |
186 | { |
187 | if (SCM_IMP (obj) || SCM_NCONSP(obj)) | |
188 | return obj; | |
189 | { | |
190 | SCM tmp = obj, copy; | |
191 | /* If this sexpr is visible in the read:sharp source, we want to | |
192 | keep that information, so only record non-constant cons cells | |
193 | which haven't previously been read by the reader. */ | |
194 | if (SCM_FALSEP (scm_whash_lookup (scm_source_whash, obj))) | |
195 | { | |
196 | if (SCM_COPY_SOURCE_P) | |
197 | { | |
198 | copy = scm_cons (recsexpr (SCM_CAR (obj), line, column, filename), | |
199 | SCM_UNDEFINED); | |
0c95b57d | 200 | while ((tmp = SCM_CDR (tmp)) && SCM_CONSP (tmp)) |
a6c64c3c MD |
201 | { |
202 | SCM_SETCDR (copy, scm_cons (recsexpr (SCM_CAR (tmp), | |
203 | line, | |
204 | column, | |
205 | filename), | |
206 | SCM_UNDEFINED)); | |
207 | copy = SCM_CDR (copy); | |
208 | } | |
209 | SCM_SETCDR (copy, tmp); | |
09a4f039 MD |
210 | } |
211 | else | |
212 | { | |
213 | recsexpr (SCM_CAR (obj), line, column, filename); | |
0c95b57d | 214 | while ((tmp = SCM_CDR (tmp)) && SCM_CONSP (tmp)) |
09a4f039 MD |
215 | recsexpr (SCM_CAR (tmp), line, column, filename); |
216 | copy = SCM_UNDEFINED; | |
217 | } | |
218 | scm_whash_insert (scm_source_whash, | |
219 | obj, | |
220 | scm_make_srcprops (line, | |
221 | column, | |
222 | filename, | |
223 | copy, | |
224 | SCM_EOL)); | |
225 | } | |
226 | return obj; | |
227 | } | |
228 | } | |
604d4dd9 | 229 | #endif |
f9c68a47 JB |
230 | |
231 | /* Consume an SCSH-style block comment. Assume that we've already | |
f9731264 JB |
232 | read the initial `#!', and eat characters until we get a |
233 | newline/exclamation-point/sharp-sign/newline sequence. */ | |
f9c68a47 JB |
234 | |
235 | static void | |
6e8d25a6 | 236 | skip_scsh_block_comment (SCM port) |
f9c68a47 | 237 | { |
f9731264 JB |
238 | /* Is this portable? Dear God, spare me from the non-eight-bit |
239 | characters. But is it tasteful? */ | |
240 | long history = 0; | |
f9c68a47 JB |
241 | |
242 | for (;;) | |
243 | { | |
b7f3516f | 244 | int c = scm_getc (port); |
f9c68a47 JB |
245 | |
246 | if (c == EOF) | |
247 | scm_wta (SCM_UNDEFINED, | |
248 | "unterminated `#! ... !#' comment", "read"); | |
f9731264 | 249 | history = ((history << 8) | (c & 0xff)) & 0xffffffff; |
f9c68a47 | 250 | |
f9731264 JB |
251 | /* Were the last four characters read "\n!#\n"? */ |
252 | if (history == (('\n' << 24) | ('!' << 16) | ('#' << 8) | '\n')) | |
253 | return; | |
f9c68a47 JB |
254 | } |
255 | } | |
256 | ||
1bbd0b84 | 257 | static SCM scm_get_hash_procedure(int c); |
f9c68a47 | 258 | |
09a4f039 | 259 | static char s_list[]="list"; |
1cc91f1b | 260 | |
0f2d19dd | 261 | SCM |
1bbd0b84 | 262 | scm_lreadr (SCM *tok_buf,SCM port,SCM *copy) |
0f2d19dd JB |
263 | { |
264 | int c; | |
265 | scm_sizet j; | |
266 | SCM p; | |
deca31e1 | 267 | |
0f2d19dd | 268 | tryagain: |
1bbd0b84 | 269 | c = scm_flush_ws (port, s_scm_read); |
b6356af7 | 270 | tryagain_no_flush_ws: |
0f2d19dd JB |
271 | switch (c) |
272 | { | |
273 | case EOF: | |
274 | return SCM_EOF_VAL; | |
275 | ||
276 | case '(': | |
09a4f039 | 277 | return SCM_RECORD_POSITIONS_P |
deca31e1 GH |
278 | ? scm_lreadrecparen (tok_buf, port, s_list, copy) |
279 | : scm_lreadparen (tok_buf, port, s_list, copy); | |
0f2d19dd JB |
280 | case ')': |
281 | scm_wta (SCM_UNDEFINED, "unexpected \")\"", "read"); | |
282 | goto tryagain; | |
283 | ||
284 | case '\'': | |
92e5aa0e | 285 | p = scm_sym_quote; |
09a4f039 | 286 | goto recquote; |
0f2d19dd | 287 | case '`': |
92e5aa0e | 288 | p = scm_sym_quasiquote; |
09a4f039 | 289 | goto recquote; |
0f2d19dd | 290 | case ',': |
b7f3516f | 291 | c = scm_getc (port); |
0f2d19dd | 292 | if ('@' == c) |
92e5aa0e | 293 | p = scm_sym_uq_splicing; |
0f2d19dd JB |
294 | else |
295 | { | |
b7f3516f | 296 | scm_ungetc (c, port); |
92e5aa0e | 297 | p = scm_sym_unquote; |
0f2d19dd | 298 | } |
09a4f039 MD |
299 | recquote: |
300 | p = scm_cons2 (p, | |
deca31e1 | 301 | scm_lreadr (tok_buf, port, copy), |
09a4f039 MD |
302 | SCM_EOL); |
303 | if (SCM_RECORD_POSITIONS_P) | |
304 | scm_whash_insert (scm_source_whash, | |
305 | p, | |
306 | scm_make_srcprops (SCM_LINUM (port), | |
307 | SCM_COL (port) - 1, | |
308 | SCM_FILENAME (port), | |
309 | SCM_COPY_SOURCE_P | |
310 | ? (*copy = scm_cons2 (SCM_CAR (p), | |
311 | SCM_CAR (SCM_CDR (p)), | |
312 | SCM_EOL)) | |
313 | : SCM_UNDEFINED, | |
314 | SCM_EOL)); | |
315 | return p; | |
0f2d19dd | 316 | case '#': |
b7f3516f | 317 | c = scm_getc (port); |
0f2d19dd JB |
318 | switch (c) |
319 | { | |
320 | case '(': | |
deca31e1 | 321 | p = scm_lreadparen (tok_buf, port, "vector", copy); |
0f2d19dd JB |
322 | return SCM_NULLP (p) ? scm_nullvect : scm_vector (p); |
323 | ||
324 | case 't': | |
325 | case 'T': | |
326 | return SCM_BOOL_T; | |
327 | case 'f': | |
328 | case 'F': | |
329 | return SCM_BOOL_F; | |
330 | ||
331 | case 'b': | |
332 | case 'B': | |
333 | case 'o': | |
334 | case 'O': | |
335 | case 'd': | |
336 | case 'D': | |
337 | case 'x': | |
338 | case 'X': | |
339 | case 'i': | |
340 | case 'I': | |
341 | case 'e': | |
342 | case 'E': | |
b7f3516f | 343 | scm_ungetc (c, port); |
0f2d19dd JB |
344 | c = '#'; |
345 | goto num; | |
346 | ||
f9c68a47 JB |
347 | case '!': |
348 | /* start of a shell script. Parse as a block comment, | |
349 | terminated by !#, just like SCSH. */ | |
350 | skip_scsh_block_comment (port); | |
b6356af7 MV |
351 | /* EOF is not an error here */ |
352 | c = scm_flush_ws (port, (char *)NULL); | |
353 | goto tryagain_no_flush_ws; | |
f9c68a47 | 354 | |
afe5177e | 355 | #ifdef HAVE_ARRAYS |
0f2d19dd | 356 | case '*': |
deca31e1 | 357 | j = scm_read_token (c, tok_buf, port, 0); |
0f2d19dd JB |
358 | p = scm_istr2bve (SCM_CHARS (*tok_buf) + 1, (long) (j - 1)); |
359 | if (SCM_NFALSEP (p)) | |
360 | return p; | |
361 | else | |
362 | goto unkshrp; | |
afe5177e | 363 | #endif |
0f2d19dd JB |
364 | |
365 | case '{': | |
deca31e1 | 366 | j = scm_read_token (c, tok_buf, port, 1); |
0f2d19dd | 367 | p = scm_intern (SCM_CHARS (*tok_buf), j); |
0f2d19dd JB |
368 | return SCM_CAR (p); |
369 | ||
370 | case '\\': | |
b7f3516f | 371 | c = scm_getc (port); |
deca31e1 | 372 | j = scm_read_token (c, tok_buf, port, 0); |
0f2d19dd JB |
373 | if (j == 1) |
374 | return SCM_MAKICHR (c); | |
375 | if (c >= '0' && c < '8') | |
376 | { | |
377 | p = scm_istr2int (SCM_CHARS (*tok_buf), (long) j, 8); | |
378 | if (SCM_NFALSEP (p)) | |
379 | return SCM_MAKICHR (SCM_INUM (p)); | |
380 | } | |
381 | for (c = 0; c < scm_n_charnames; c++) | |
382 | if (scm_charnames[c] | |
383 | && (scm_casei_streq (scm_charnames[c], SCM_CHARS (*tok_buf)))) | |
384 | return SCM_MAKICHR (scm_charnums[c]); | |
385 | scm_wta (SCM_UNDEFINED, "unknown # object: #\\", SCM_CHARS (*tok_buf)); | |
386 | ||
50a095f1 JB |
387 | /* #:SYMBOL is a syntax for keywords supported in all contexts. */ |
388 | case ':': | |
389 | j = scm_read_token ('-', tok_buf, port, 0); | |
390 | p = scm_intern (SCM_CHARS (*tok_buf), j); | |
50a095f1 | 391 | return scm_make_keyword_from_dash_symbol (SCM_CAR (p)); |
0f2d19dd JB |
392 | |
393 | default: | |
394 | callshrp: | |
deca31e1 GH |
395 | { |
396 | SCM sharp = scm_get_hash_procedure (c); | |
397 | ||
398 | if (SCM_NIMP (sharp)) | |
399 | { | |
400 | int line = SCM_LINUM (port); | |
401 | int column = SCM_COL (port) - 2; | |
402 | SCM got; | |
403 | ||
404 | got = scm_apply (sharp, | |
405 | SCM_MAKICHR (c), | |
406 | scm_acons (port, SCM_EOL, SCM_EOL)); | |
407 | if (SCM_UNSPECIFIED == got) | |
408 | goto unkshrp; | |
409 | if (SCM_RECORD_POSITIONS_P) | |
410 | return *copy = recsexpr (got, line, column, | |
411 | SCM_FILENAME (port)); | |
412 | else | |
413 | return got; | |
414 | } | |
415 | } | |
03bc4386 | 416 | unkshrp: |
1bbd0b84 | 417 | scm_misc_error (s_scm_read, "Unknown # object: %S", |
03bc4386 | 418 | scm_listify (SCM_MAKICHR (c), SCM_UNDEFINED)); |
0f2d19dd JB |
419 | } |
420 | ||
421 | case '"': | |
422 | j = 0; | |
b7f3516f | 423 | while ('"' != (c = scm_getc (port))) |
0f2d19dd JB |
424 | { |
425 | SCM_ASSERT (EOF != c, SCM_UNDEFINED, "end of file in ", "string"); | |
426 | ||
b7f3516f | 427 | while (j + 2 >= SCM_LENGTH (*tok_buf)) |
0f2d19dd JB |
428 | scm_grow_tok_buf (tok_buf); |
429 | ||
430 | if (c == '\\') | |
b7f3516f | 431 | switch (c = scm_getc (port)) |
0f2d19dd JB |
432 | { |
433 | case '\n': | |
434 | continue; | |
435 | case '0': | |
436 | c = '\0'; | |
437 | break; | |
438 | case 'f': | |
439 | c = '\f'; | |
440 | break; | |
441 | case 'n': | |
442 | c = '\n'; | |
443 | break; | |
444 | case 'r': | |
445 | c = '\r'; | |
446 | break; | |
447 | case 't': | |
448 | c = '\t'; | |
449 | break; | |
450 | case 'a': | |
451 | c = '\007'; | |
452 | break; | |
453 | case 'v': | |
454 | c = '\v'; | |
455 | break; | |
456 | } | |
b7f3516f TT |
457 | SCM_CHARS (*tok_buf)[j] = c; |
458 | ++j; | |
0f2d19dd JB |
459 | } |
460 | if (j == 0) | |
461 | return scm_nullstr; | |
462 | SCM_CHARS (*tok_buf)[j] = 0; | |
463 | { | |
464 | SCM str; | |
465 | str = scm_makfromstr (SCM_CHARS (*tok_buf), j, 0); | |
0f2d19dd JB |
466 | return str; |
467 | } | |
468 | ||
469 | case'0':case '1':case '2':case '3':case '4': | |
470 | case '5':case '6':case '7':case '8':case '9': | |
471 | case '.': | |
472 | case '-': | |
473 | case '+': | |
474 | num: | |
deca31e1 | 475 | j = scm_read_token (c, tok_buf, port, 0); |
0f2d19dd JB |
476 | p = scm_istring2number (SCM_CHARS (*tok_buf), (long) j, 10L); |
477 | if (SCM_NFALSEP (p)) | |
478 | return p; | |
479 | if (c == '#') | |
480 | { | |
b7f3516f | 481 | if ((j == 2) && (scm_getc (port) == '(')) |
0f2d19dd | 482 | { |
b7f3516f | 483 | scm_ungetc ('(', port); |
0f2d19dd JB |
484 | c = SCM_CHARS (*tok_buf)[1]; |
485 | goto callshrp; | |
486 | } | |
487 | scm_wta (SCM_UNDEFINED, "unknown # object", SCM_CHARS (*tok_buf)); | |
488 | } | |
489 | goto tok; | |
490 | ||
491 | case ':': | |
c7733771 GH |
492 | if (SCM_KEYWORD_STYLE == scm_keyword_prefix) |
493 | { | |
494 | j = scm_read_token ('-', tok_buf, port, 0); | |
495 | p = scm_intern (SCM_CHARS (*tok_buf), j); | |
c7733771 GH |
496 | return scm_make_keyword_from_dash_symbol (SCM_CAR (p)); |
497 | } | |
498 | /* fallthrough */ | |
0f2d19dd | 499 | default: |
deca31e1 | 500 | j = scm_read_token (c, tok_buf, port, 0); |
0f2d19dd JB |
501 | /* fallthrough */ |
502 | ||
503 | tok: | |
504 | p = scm_intern (SCM_CHARS (*tok_buf), j); | |
0f2d19dd JB |
505 | return SCM_CAR (p); |
506 | } | |
507 | } | |
508 | ||
509 | #ifdef _UNICOS | |
510 | _Pragma ("noopt"); /* # pragma _CRI noopt */ | |
511 | #endif | |
1cc91f1b | 512 | |
0f2d19dd | 513 | scm_sizet |
6e8d25a6 | 514 | scm_read_token (int ic, SCM *tok_buf, SCM port, int weird) |
0f2d19dd JB |
515 | { |
516 | register scm_sizet j; | |
517 | register int c; | |
518 | register char *p; | |
519 | ||
deca31e1 | 520 | c = (SCM_CASE_INSENSITIVE_P ? scm_downcase(ic) : ic); |
0f2d19dd JB |
521 | p = SCM_CHARS (*tok_buf); |
522 | ||
523 | if (weird) | |
524 | j = 0; | |
525 | else | |
526 | { | |
527 | j = 0; | |
b7f3516f | 528 | while (j + 2 >= SCM_LENGTH (*tok_buf)) |
0f2d19dd | 529 | p = scm_grow_tok_buf (tok_buf); |
b7f3516f TT |
530 | p[j] = c; |
531 | ++j; | |
0f2d19dd JB |
532 | } |
533 | ||
534 | while (1) | |
535 | { | |
b7f3516f | 536 | while (j + 2 >= SCM_LENGTH (*tok_buf)) |
0f2d19dd | 537 | p = scm_grow_tok_buf (tok_buf); |
b7f3516f | 538 | c = scm_getc (port); |
0f2d19dd JB |
539 | switch (c) |
540 | { | |
541 | case '(': | |
542 | case ')': | |
543 | case '"': | |
544 | case ';': | |
545 | case SCM_WHITE_SPACES: | |
546 | case SCM_LINE_INCREMENTORS: | |
547 | if (weird) | |
548 | goto default_case; | |
549 | ||
b7f3516f | 550 | scm_ungetc (c, port); |
0f2d19dd JB |
551 | case EOF: |
552 | eof_case: | |
553 | p[j] = 0; | |
554 | return j; | |
555 | case '\\': | |
556 | if (!weird) | |
557 | goto default_case; | |
558 | else | |
559 | { | |
b7f3516f | 560 | c = scm_getc (port); |
0f2d19dd JB |
561 | if (c == EOF) |
562 | goto eof_case; | |
563 | else | |
564 | goto default_case; | |
565 | } | |
566 | case '}': | |
567 | if (!weird) | |
568 | goto default_case; | |
569 | ||
b7f3516f | 570 | c = scm_getc (port); |
0f2d19dd JB |
571 | if (c == '#') |
572 | { | |
573 | p[j] = 0; | |
574 | return j; | |
575 | } | |
576 | else | |
577 | { | |
b7f3516f | 578 | scm_ungetc (c, port); |
0f2d19dd JB |
579 | c = '}'; |
580 | goto default_case; | |
581 | } | |
582 | ||
583 | default: | |
584 | default_case: | |
585 | { | |
deca31e1 | 586 | c = (SCM_CASE_INSENSITIVE_P ? scm_downcase(c) : c); |
b7f3516f TT |
587 | p[j] = c; |
588 | ++j; | |
0f2d19dd JB |
589 | } |
590 | ||
591 | } | |
592 | } | |
593 | } | |
1cc91f1b | 594 | |
0f2d19dd JB |
595 | #ifdef _UNICOS |
596 | _Pragma ("opt"); /* # pragma _CRI opt */ | |
597 | #endif | |
598 | ||
0f2d19dd | 599 | SCM |
6e8d25a6 | 600 | scm_lreadparen (SCM *tok_buf, SCM port, char *name, SCM *copy) |
0f2d19dd JB |
601 | { |
602 | SCM tmp; | |
603 | SCM tl; | |
604 | SCM ans; | |
605 | int c; | |
606 | ||
607 | c = scm_flush_ws (port, name); | |
608 | if (')' == c) | |
609 | return SCM_EOL; | |
b7f3516f | 610 | scm_ungetc (c, port); |
92e5aa0e | 611 | if (scm_sym_dot == (tmp = scm_lreadr (tok_buf, port, copy))) |
0f2d19dd | 612 | { |
deca31e1 | 613 | ans = scm_lreadr (tok_buf, port, copy); |
0f2d19dd JB |
614 | closeit: |
615 | if (')' != (c = scm_flush_ws (port, name))) | |
616 | scm_wta (SCM_UNDEFINED, "missing close paren", ""); | |
617 | return ans; | |
618 | } | |
619 | ans = tl = scm_cons (tmp, SCM_EOL); | |
620 | while (')' != (c = scm_flush_ws (port, name))) | |
621 | { | |
b7f3516f | 622 | scm_ungetc (c, port); |
92e5aa0e | 623 | if (scm_sym_dot == (tmp = scm_lreadr (tok_buf, port, copy))) |
0f2d19dd | 624 | { |
deca31e1 | 625 | SCM_SETCDR (tl, scm_lreadr (tok_buf, port, copy)); |
0f2d19dd JB |
626 | goto closeit; |
627 | } | |
a6c64c3c MD |
628 | SCM_SETCDR (tl, scm_cons (tmp, SCM_EOL)); |
629 | tl = SCM_CDR (tl); | |
0f2d19dd JB |
630 | } |
631 | return ans; | |
632 | } | |
633 | ||
1cc91f1b | 634 | |
09a4f039 | 635 | SCM |
6e8d25a6 | 636 | scm_lreadrecparen (SCM *tok_buf, SCM port, char *name, SCM *copy) |
09a4f039 MD |
637 | { |
638 | register int c; | |
639 | register SCM tmp; | |
4dc2435a JB |
640 | register SCM tl, tl2 = SCM_EOL; |
641 | SCM ans, ans2 = SCM_EOL; | |
09a4f039 MD |
642 | /* Need to capture line and column numbers here. */ |
643 | int line = SCM_LINUM (port); | |
644 | int column = SCM_COL (port) - 1; | |
645 | ||
646 | c = scm_flush_ws (port, name); | |
647 | if (')' == c) | |
648 | return SCM_EOL; | |
b7f3516f | 649 | scm_ungetc (c, port); |
92e5aa0e | 650 | if (scm_sym_dot == (tmp = scm_lreadr (tok_buf, port, copy))) |
09a4f039 | 651 | { |
deca31e1 | 652 | ans = scm_lreadr (tok_buf, port, copy); |
09a4f039 MD |
653 | if (')' != (c = scm_flush_ws (port, name))) |
654 | scm_wta (SCM_UNDEFINED, "missing close paren", ""); | |
655 | return ans; | |
656 | } | |
657 | /* Build the head of the list structure. */ | |
658 | ans = tl = scm_cons (tmp, SCM_EOL); | |
659 | if (SCM_COPY_SOURCE_P) | |
0c95b57d | 660 | ans2 = tl2 = scm_cons (SCM_CONSP (tmp) |
09a4f039 MD |
661 | ? *copy |
662 | : tmp, | |
663 | SCM_EOL); | |
664 | while (')' != (c = scm_flush_ws (port, name))) | |
665 | { | |
b7f3516f | 666 | scm_ungetc (c, port); |
92e5aa0e | 667 | if (scm_sym_dot == (tmp = scm_lreadr (tok_buf, port, copy))) |
09a4f039 | 668 | { |
deca31e1 | 669 | SCM_SETCDR (tl, tmp = scm_lreadr (tok_buf, port, copy)); |
09a4f039 | 670 | if (SCM_COPY_SOURCE_P) |
0c95b57d | 671 | SCM_SETCDR (tl2, scm_cons (SCM_CONSP (tmp) |
09a4f039 MD |
672 | ? *copy |
673 | : tmp, | |
674 | SCM_EOL)); | |
675 | if (')' != (c = scm_flush_ws (port, name))) | |
676 | scm_wta (SCM_UNDEFINED, "missing close paren", ""); | |
677 | goto exit; | |
678 | } | |
679 | tl = SCM_SETCDR (tl, scm_cons (tmp, SCM_EOL)); | |
680 | if (SCM_COPY_SOURCE_P) | |
0c95b57d | 681 | tl2 = SCM_SETCDR (tl2, scm_cons (SCM_CONSP (tmp) |
09a4f039 MD |
682 | ? *copy |
683 | : tmp, | |
684 | SCM_EOL)); | |
685 | } | |
686 | exit: | |
687 | scm_whash_insert (scm_source_whash, | |
688 | ans, | |
689 | scm_make_srcprops (line, | |
690 | column, | |
691 | SCM_FILENAME (port), | |
692 | SCM_COPY_SOURCE_P | |
693 | ? *copy = ans2 | |
694 | : SCM_UNDEFINED, | |
695 | SCM_EOL)); | |
696 | return ans; | |
697 | } | |
698 | ||
0f2d19dd JB |
699 | |
700 | \f | |
701 | ||
14de3b42 GH |
702 | /* Manipulate the read-hash-procedures alist. This could be written in |
703 | Scheme, but maybe it will also be used by C code during initialisation. */ | |
1bbd0b84 GB |
704 | GUILE_PROC (scm_read_hash_extend, "read-hash-extend", 2, 0, 0, |
705 | (SCM chr, SCM proc), | |
706 | "") | |
707 | #define FUNC_NAME s_scm_read_hash_extend | |
deca31e1 | 708 | { |
fed9c9a2 GH |
709 | SCM this; |
710 | SCM prev; | |
711 | ||
1bbd0b84 | 712 | SCM_VALIDATE_CHAR(1,chr); |
fed9c9a2 | 713 | SCM_ASSERT (SCM_FALSEP (proc) || SCM_NIMP(proc), proc, SCM_ARG2, |
1bbd0b84 | 714 | FUNC_NAME); |
fed9c9a2 | 715 | |
14de3b42 GH |
716 | /* Check if chr is already in the alist. */ |
717 | this = *scm_read_hash_procedures; | |
718 | prev = SCM_BOOL_F; | |
fed9c9a2 GH |
719 | while (1) |
720 | { | |
721 | if (SCM_NULLP (this)) | |
722 | { | |
723 | /* not found, so add it to the beginning. */ | |
724 | if (SCM_NFALSEP (proc)) | |
725 | { | |
14de3b42 GH |
726 | *scm_read_hash_procedures = |
727 | scm_cons (scm_cons (chr, proc), *scm_read_hash_procedures); | |
fed9c9a2 GH |
728 | } |
729 | break; | |
730 | } | |
731 | if (chr == SCM_CAAR (this)) | |
732 | { | |
733 | /* already in the alist. */ | |
734 | if (SCM_FALSEP (proc)) | |
14de3b42 GH |
735 | { |
736 | /* remove it. */ | |
737 | if (prev == SCM_BOOL_F) | |
738 | { | |
739 | *scm_read_hash_procedures = | |
740 | SCM_CDR (*scm_read_hash_procedures); | |
741 | } | |
742 | else | |
743 | scm_set_cdr_x (prev, SCM_CDR (this)); | |
744 | } | |
fed9c9a2 | 745 | else |
14de3b42 GH |
746 | { |
747 | /* replace it. */ | |
748 | scm_set_cdr_x (SCM_CAR (this), proc); | |
749 | } | |
fed9c9a2 GH |
750 | break; |
751 | } | |
752 | prev = this; | |
753 | this = SCM_CDR (this); | |
754 | } | |
deca31e1 | 755 | |
deca31e1 GH |
756 | return SCM_UNSPECIFIED; |
757 | } | |
1bbd0b84 | 758 | #undef FUNC_NAME |
0f2d19dd | 759 | |
deca31e1 GH |
760 | /* Recover the read-hash procedure corresponding to char c. */ |
761 | static SCM | |
6e8d25a6 | 762 | scm_get_hash_procedure (int c) |
deca31e1 | 763 | { |
14de3b42 | 764 | SCM rest = *scm_read_hash_procedures; |
fed9c9a2 | 765 | |
deca31e1 GH |
766 | while (1) |
767 | { | |
768 | if (SCM_NULLP (rest)) | |
769 | return SCM_BOOL_F; | |
770 | ||
771 | if (SCM_ICHR (SCM_CAAR (rest)) == c) | |
772 | return SCM_CDAR (rest); | |
773 | ||
774 | rest = SCM_CDR (rest); | |
775 | } | |
776 | } | |
1cc91f1b | 777 | |
0f2d19dd JB |
778 | void |
779 | scm_init_read () | |
0f2d19dd | 780 | { |
14de3b42 GH |
781 | scm_read_hash_procedures = |
782 | SCM_CDRLOC (scm_sysintern ("read-hash-procedures", SCM_EOL)); | |
fed9c9a2 | 783 | |
b7ff98dd | 784 | scm_init_opts (scm_read_options, scm_read_opts, SCM_N_READ_OPTIONS); |
0f2d19dd JB |
785 | #include "read.x" |
786 | } |