Commit | Line | Data |
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f2c9fcb0 | 1 | /* Copyright (C) 1995,1996,1997, 1999, 2000 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 | 47 | #include <stdio.h> |
a0599745 MD |
48 | #include "libguile/_scm.h" |
49 | #include "libguile/chars.h" | |
50 | #include "libguile/eval.h" | |
51 | #include "libguile/unif.h" | |
52 | #include "libguile/keywords.h" | |
53 | #include "libguile/alist.h" | |
54 | #include "libguile/srcprop.h" | |
55 | #include "libguile/hashtab.h" | |
56 | #include "libguile/hash.h" | |
57 | #include "libguile/ports.h" | |
58 | #include "libguile/root.h" | |
59 | #include "libguile/strings.h" | |
60 | #include "libguile/vectors.h" | |
61 | ||
62 | #include "libguile/validate.h" | |
63 | #include "libguile/read.h" | |
0f2d19dd JB |
64 | |
65 | \f | |
66 | ||
c7733771 GH |
67 | SCM_SYMBOL (scm_keyword_prefix, "prefix"); |
68 | ||
a16f6fe7 | 69 | scm_option scm_read_opts[] = { |
b7ff98dd MD |
70 | { SCM_OPTION_BOOLEAN, "copy", 0, |
71 | "Copy source code expressions." }, | |
ac74fc22 | 72 | { SCM_OPTION_BOOLEAN, "positions", 0, |
deca31e1 GH |
73 | "Record positions of source code expressions." }, |
74 | { SCM_OPTION_BOOLEAN, "case-insensitive", 0, | |
c7733771 | 75 | "Convert symbols to lower case."}, |
f1267706 | 76 | { SCM_OPTION_SCM, "keywords", SCM_UNPACK (SCM_BOOL_F), |
c7733771 | 77 | "Style of keyword recognition: #f or 'prefix"} |
a16f6fe7 MD |
78 | }; |
79 | ||
a1ec6916 | 80 | SCM_DEFINE (scm_read_options, "read-options-interface", 0, 1, 0, |
1bbd0b84 GB |
81 | (SCM setting), |
82 | "") | |
83 | #define FUNC_NAME s_scm_read_options | |
a16f6fe7 | 84 | { |
b7ff98dd MD |
85 | SCM ans = scm_options (setting, |
86 | scm_read_opts, | |
87 | SCM_N_READ_OPTIONS, | |
1bbd0b84 | 88 | FUNC_NAME); |
b7ff98dd MD |
89 | if (SCM_COPY_SOURCE_P) |
90 | SCM_RECORD_POSITIONS_P = 1; | |
a16f6fe7 MD |
91 | return ans; |
92 | } | |
1bbd0b84 | 93 | #undef FUNC_NAME |
a16f6fe7 | 94 | |
14de3b42 GH |
95 | /* An association list mapping extra hash characters to procedures. */ |
96 | static SCM *scm_read_hash_procedures; | |
deca31e1 | 97 | |
a1ec6916 | 98 | SCM_DEFINE (scm_read, "read", 0, 1, 0, |
1bbd0b84 GB |
99 | (SCM port), |
100 | "") | |
101 | #define FUNC_NAME s_scm_read | |
0f2d19dd JB |
102 | { |
103 | int c; | |
09a4f039 | 104 | SCM tok_buf, copy; |
0f2d19dd JB |
105 | |
106 | if (SCM_UNBNDP (port)) | |
107 | port = scm_cur_inp; | |
3b3b36dd | 108 | SCM_VALIDATE_OPINPORT (1,port); |
0f2d19dd | 109 | |
0f2d19dd JB |
110 | c = scm_flush_ws (port, (char *) NULL); |
111 | if (EOF == c) | |
112 | return SCM_EOF_VAL; | |
b7f3516f | 113 | scm_ungetc (c, port); |
0f2d19dd JB |
114 | |
115 | tok_buf = scm_makstr (30L, 0); | |
deca31e1 | 116 | return scm_lreadr (&tok_buf, port, ©); |
0f2d19dd | 117 | } |
1bbd0b84 | 118 | #undef FUNC_NAME |
0f2d19dd JB |
119 | |
120 | ||
1cc91f1b | 121 | |
0f2d19dd | 122 | char * |
6e8d25a6 | 123 | scm_grow_tok_buf (SCM *tok_buf) |
0f2d19dd | 124 | { |
94115ae3 DH |
125 | unsigned long int oldlen = SCM_STRING_LENGTH (*tok_buf); |
126 | SCM newstr = scm_makstr (2 * oldlen, 0); | |
127 | unsigned long int i; | |
128 | ||
129 | for (i = 0; i != oldlen; ++i) | |
130 | SCM_STRING_CHARS (newstr) [i] = SCM_STRING_CHARS (*tok_buf) [i]; | |
131 | ||
132 | *tok_buf = newstr; | |
133 | return SCM_STRING_CHARS (newstr); | |
0f2d19dd JB |
134 | } |
135 | ||
136 | ||
1cc91f1b | 137 | |
0f2d19dd | 138 | int |
6e8d25a6 | 139 | scm_flush_ws (SCM port, const char *eoferr) |
0f2d19dd JB |
140 | { |
141 | register int c; | |
142 | while (1) | |
b7f3516f | 143 | switch (c = scm_getc (port)) |
0f2d19dd JB |
144 | { |
145 | case EOF: | |
146 | goteof: | |
147 | if (eoferr) | |
d156d3b7 MV |
148 | { |
149 | if (SCM_FILENAME (port) != SCM_BOOL_F) | |
150 | scm_misc_error (eoferr, | |
151 | "end of file in ~A", | |
152 | SCM_LIST1 (SCM_FILENAME (port))); | |
153 | else | |
154 | scm_misc_error (eoferr, "end of file", SCM_EOL); | |
155 | } | |
0f2d19dd JB |
156 | return c; |
157 | case ';': | |
158 | lp: | |
b7f3516f | 159 | switch (c = scm_getc (port)) |
0f2d19dd JB |
160 | { |
161 | case EOF: | |
162 | goto goteof; | |
163 | default: | |
164 | goto lp; | |
165 | case SCM_LINE_INCREMENTORS: | |
166 | break; | |
167 | } | |
168 | break; | |
169 | case SCM_LINE_INCREMENTORS: | |
0f2d19dd | 170 | case SCM_SINGLE_SPACES: |
0f2d19dd | 171 | case '\t': |
0f2d19dd JB |
172 | break; |
173 | default: | |
174 | return c; | |
175 | } | |
176 | } | |
177 | ||
178 | ||
1cc91f1b | 179 | |
0f2d19dd | 180 | int |
6e8d25a6 | 181 | scm_casei_streq (char *s1, char *s2) |
0f2d19dd JB |
182 | { |
183 | while (*s1 && *s2) | |
184 | if (scm_downcase((int)*s1) != scm_downcase((int)*s2)) | |
185 | return 0; | |
186 | else | |
187 | { | |
188 | ++s1; | |
189 | ++s2; | |
190 | } | |
191 | return !(*s1 || *s2); | |
192 | } | |
193 | ||
194 | ||
09a4f039 MD |
195 | /* recsexpr is used when recording expressions |
196 | * constructed by read:sharp. | |
197 | */ | |
604d4dd9 JB |
198 | #ifndef DEBUG_EXTENSIONS |
199 | #define recsexpr(obj, line, column, filename) (obj) | |
200 | #else | |
09a4f039 | 201 | static SCM |
1bbd0b84 | 202 | recsexpr (SCM obj,int line,int column,SCM filename) |
09a4f039 | 203 | { |
fee7ef83 | 204 | if (!SCM_CONSP(obj)) { |
09a4f039 | 205 | return obj; |
fee7ef83 | 206 | } else { |
09a4f039 MD |
207 | SCM tmp = obj, copy; |
208 | /* If this sexpr is visible in the read:sharp source, we want to | |
209 | keep that information, so only record non-constant cons cells | |
210 | which haven't previously been read by the reader. */ | |
211 | if (SCM_FALSEP (scm_whash_lookup (scm_source_whash, obj))) | |
212 | { | |
213 | if (SCM_COPY_SOURCE_P) | |
214 | { | |
215 | copy = scm_cons (recsexpr (SCM_CAR (obj), line, column, filename), | |
216 | SCM_UNDEFINED); | |
0c95b57d | 217 | while ((tmp = SCM_CDR (tmp)) && SCM_CONSP (tmp)) |
a6c64c3c MD |
218 | { |
219 | SCM_SETCDR (copy, scm_cons (recsexpr (SCM_CAR (tmp), | |
220 | line, | |
221 | column, | |
222 | filename), | |
223 | SCM_UNDEFINED)); | |
224 | copy = SCM_CDR (copy); | |
225 | } | |
226 | SCM_SETCDR (copy, tmp); | |
09a4f039 MD |
227 | } |
228 | else | |
229 | { | |
230 | recsexpr (SCM_CAR (obj), line, column, filename); | |
0c95b57d | 231 | while ((tmp = SCM_CDR (tmp)) && SCM_CONSP (tmp)) |
09a4f039 MD |
232 | recsexpr (SCM_CAR (tmp), line, column, filename); |
233 | copy = SCM_UNDEFINED; | |
234 | } | |
235 | scm_whash_insert (scm_source_whash, | |
236 | obj, | |
237 | scm_make_srcprops (line, | |
238 | column, | |
239 | filename, | |
240 | copy, | |
241 | SCM_EOL)); | |
242 | } | |
243 | return obj; | |
244 | } | |
245 | } | |
604d4dd9 | 246 | #endif |
f9c68a47 JB |
247 | |
248 | /* Consume an SCSH-style block comment. Assume that we've already | |
f9731264 JB |
249 | read the initial `#!', and eat characters until we get a |
250 | newline/exclamation-point/sharp-sign/newline sequence. */ | |
f9c68a47 JB |
251 | |
252 | static void | |
6e8d25a6 | 253 | skip_scsh_block_comment (SCM port) |
f9c68a47 | 254 | { |
f9731264 JB |
255 | /* Is this portable? Dear God, spare me from the non-eight-bit |
256 | characters. But is it tasteful? */ | |
257 | long history = 0; | |
f9c68a47 JB |
258 | |
259 | for (;;) | |
260 | { | |
b7f3516f | 261 | int c = scm_getc (port); |
f9c68a47 JB |
262 | |
263 | if (c == EOF) | |
264 | scm_wta (SCM_UNDEFINED, | |
265 | "unterminated `#! ... !#' comment", "read"); | |
f9731264 | 266 | history = ((history << 8) | (c & 0xff)) & 0xffffffff; |
f9c68a47 | 267 | |
f9731264 JB |
268 | /* Were the last four characters read "\n!#\n"? */ |
269 | if (history == (('\n' << 24) | ('!' << 16) | ('#' << 8) | '\n')) | |
270 | return; | |
f9c68a47 JB |
271 | } |
272 | } | |
273 | ||
1bbd0b84 | 274 | static SCM scm_get_hash_procedure(int c); |
f9c68a47 | 275 | |
09a4f039 | 276 | static char s_list[]="list"; |
1cc91f1b | 277 | |
0f2d19dd | 278 | SCM |
1bbd0b84 | 279 | scm_lreadr (SCM *tok_buf,SCM port,SCM *copy) |
0f2d19dd JB |
280 | { |
281 | int c; | |
282 | scm_sizet j; | |
283 | SCM p; | |
deca31e1 | 284 | |
0f2d19dd | 285 | tryagain: |
1bbd0b84 | 286 | c = scm_flush_ws (port, s_scm_read); |
b6356af7 | 287 | tryagain_no_flush_ws: |
0f2d19dd JB |
288 | switch (c) |
289 | { | |
290 | case EOF: | |
291 | return SCM_EOF_VAL; | |
292 | ||
293 | case '(': | |
09a4f039 | 294 | return SCM_RECORD_POSITIONS_P |
deca31e1 GH |
295 | ? scm_lreadrecparen (tok_buf, port, s_list, copy) |
296 | : scm_lreadparen (tok_buf, port, s_list, copy); | |
0f2d19dd JB |
297 | case ')': |
298 | scm_wta (SCM_UNDEFINED, "unexpected \")\"", "read"); | |
299 | goto tryagain; | |
300 | ||
301 | case '\'': | |
92e5aa0e | 302 | p = scm_sym_quote; |
09a4f039 | 303 | goto recquote; |
0f2d19dd | 304 | case '`': |
92e5aa0e | 305 | p = scm_sym_quasiquote; |
09a4f039 | 306 | goto recquote; |
0f2d19dd | 307 | case ',': |
b7f3516f | 308 | c = scm_getc (port); |
0f2d19dd | 309 | if ('@' == c) |
92e5aa0e | 310 | p = scm_sym_uq_splicing; |
0f2d19dd JB |
311 | else |
312 | { | |
b7f3516f | 313 | scm_ungetc (c, port); |
92e5aa0e | 314 | p = scm_sym_unquote; |
0f2d19dd | 315 | } |
09a4f039 MD |
316 | recquote: |
317 | p = scm_cons2 (p, | |
deca31e1 | 318 | scm_lreadr (tok_buf, port, copy), |
09a4f039 MD |
319 | SCM_EOL); |
320 | if (SCM_RECORD_POSITIONS_P) | |
321 | scm_whash_insert (scm_source_whash, | |
322 | p, | |
323 | scm_make_srcprops (SCM_LINUM (port), | |
324 | SCM_COL (port) - 1, | |
325 | SCM_FILENAME (port), | |
326 | SCM_COPY_SOURCE_P | |
327 | ? (*copy = scm_cons2 (SCM_CAR (p), | |
328 | SCM_CAR (SCM_CDR (p)), | |
329 | SCM_EOL)) | |
330 | : SCM_UNDEFINED, | |
331 | SCM_EOL)); | |
332 | return p; | |
0f2d19dd | 333 | case '#': |
b7f3516f | 334 | c = scm_getc (port); |
0f2d19dd JB |
335 | switch (c) |
336 | { | |
337 | case '(': | |
deca31e1 | 338 | p = scm_lreadparen (tok_buf, port, "vector", copy); |
0f2d19dd JB |
339 | return SCM_NULLP (p) ? scm_nullvect : scm_vector (p); |
340 | ||
341 | case 't': | |
342 | case 'T': | |
343 | return SCM_BOOL_T; | |
344 | case 'f': | |
345 | case 'F': | |
346 | return SCM_BOOL_F; | |
347 | ||
348 | case 'b': | |
349 | case 'B': | |
350 | case 'o': | |
351 | case 'O': | |
352 | case 'd': | |
353 | case 'D': | |
354 | case 'x': | |
355 | case 'X': | |
356 | case 'i': | |
357 | case 'I': | |
358 | case 'e': | |
359 | case 'E': | |
b7f3516f | 360 | scm_ungetc (c, port); |
0f2d19dd JB |
361 | c = '#'; |
362 | goto num; | |
363 | ||
f9c68a47 JB |
364 | case '!': |
365 | /* start of a shell script. Parse as a block comment, | |
366 | terminated by !#, just like SCSH. */ | |
367 | skip_scsh_block_comment (port); | |
b6356af7 MV |
368 | /* EOF is not an error here */ |
369 | c = scm_flush_ws (port, (char *)NULL); | |
370 | goto tryagain_no_flush_ws; | |
f9c68a47 | 371 | |
afe5177e | 372 | #ifdef HAVE_ARRAYS |
0f2d19dd | 373 | case '*': |
deca31e1 | 374 | j = scm_read_token (c, tok_buf, port, 0); |
405aaef9 | 375 | p = scm_istr2bve (SCM_STRING_CHARS (*tok_buf) + 1, (long) (j - 1)); |
0f2d19dd JB |
376 | if (SCM_NFALSEP (p)) |
377 | return p; | |
378 | else | |
379 | goto unkshrp; | |
afe5177e | 380 | #endif |
0f2d19dd JB |
381 | |
382 | case '{': | |
deca31e1 | 383 | j = scm_read_token (c, tok_buf, port, 1); |
405aaef9 | 384 | p = scm_intern (SCM_STRING_CHARS (*tok_buf), j); |
0f2d19dd JB |
385 | return SCM_CAR (p); |
386 | ||
387 | case '\\': | |
b7f3516f | 388 | c = scm_getc (port); |
deca31e1 | 389 | j = scm_read_token (c, tok_buf, port, 0); |
0f2d19dd | 390 | if (j == 1) |
7866a09b | 391 | return SCM_MAKE_CHAR (c); |
0f2d19dd JB |
392 | if (c >= '0' && c < '8') |
393 | { | |
405aaef9 | 394 | p = scm_istr2int (SCM_STRING_CHARS (*tok_buf), (long) j, 8); |
0f2d19dd | 395 | if (SCM_NFALSEP (p)) |
7866a09b | 396 | return SCM_MAKE_CHAR (SCM_INUM (p)); |
0f2d19dd JB |
397 | } |
398 | for (c = 0; c < scm_n_charnames; c++) | |
399 | if (scm_charnames[c] | |
405aaef9 | 400 | && (scm_casei_streq (scm_charnames[c], SCM_STRING_CHARS (*tok_buf)))) |
7866a09b | 401 | return SCM_MAKE_CHAR (scm_charnums[c]); |
405aaef9 | 402 | scm_wta (SCM_UNDEFINED, "unknown # object: #\\", SCM_STRING_CHARS (*tok_buf)); |
0f2d19dd | 403 | |
50a095f1 JB |
404 | /* #:SYMBOL is a syntax for keywords supported in all contexts. */ |
405 | case ':': | |
406 | j = scm_read_token ('-', tok_buf, port, 0); | |
405aaef9 | 407 | p = scm_intern (SCM_STRING_CHARS (*tok_buf), j); |
50a095f1 | 408 | return scm_make_keyword_from_dash_symbol (SCM_CAR (p)); |
0f2d19dd JB |
409 | |
410 | default: | |
411 | callshrp: | |
deca31e1 GH |
412 | { |
413 | SCM sharp = scm_get_hash_procedure (c); | |
414 | ||
415 | if (SCM_NIMP (sharp)) | |
416 | { | |
417 | int line = SCM_LINUM (port); | |
418 | int column = SCM_COL (port) - 2; | |
419 | SCM got; | |
420 | ||
421 | got = scm_apply (sharp, | |
7866a09b | 422 | SCM_MAKE_CHAR (c), |
deca31e1 | 423 | scm_acons (port, SCM_EOL, SCM_EOL)); |
54778cd3 | 424 | if (SCM_EQ_P (got, SCM_UNSPECIFIED)) |
deca31e1 GH |
425 | goto unkshrp; |
426 | if (SCM_RECORD_POSITIONS_P) | |
427 | return *copy = recsexpr (got, line, column, | |
428 | SCM_FILENAME (port)); | |
429 | else | |
430 | return got; | |
431 | } | |
432 | } | |
03bc4386 | 433 | unkshrp: |
70d63753 | 434 | scm_misc_error (s_scm_read, "Unknown # object: ~S", |
7866a09b | 435 | scm_listify (SCM_MAKE_CHAR (c), SCM_UNDEFINED)); |
0f2d19dd JB |
436 | } |
437 | ||
438 | case '"': | |
439 | j = 0; | |
b7f3516f | 440 | while ('"' != (c = scm_getc (port))) |
0f2d19dd JB |
441 | { |
442 | SCM_ASSERT (EOF != c, SCM_UNDEFINED, "end of file in ", "string"); | |
443 | ||
94115ae3 | 444 | while (j + 2 >= SCM_STRING_LENGTH (*tok_buf)) |
0f2d19dd JB |
445 | scm_grow_tok_buf (tok_buf); |
446 | ||
447 | if (c == '\\') | |
b7f3516f | 448 | switch (c = scm_getc (port)) |
0f2d19dd JB |
449 | { |
450 | case '\n': | |
451 | continue; | |
452 | case '0': | |
453 | c = '\0'; | |
454 | break; | |
455 | case 'f': | |
456 | c = '\f'; | |
457 | break; | |
458 | case 'n': | |
459 | c = '\n'; | |
460 | break; | |
461 | case 'r': | |
462 | c = '\r'; | |
463 | break; | |
464 | case 't': | |
465 | c = '\t'; | |
466 | break; | |
467 | case 'a': | |
468 | c = '\007'; | |
469 | break; | |
470 | case 'v': | |
471 | c = '\v'; | |
472 | break; | |
473 | } | |
405aaef9 | 474 | SCM_STRING_CHARS (*tok_buf)[j] = c; |
b7f3516f | 475 | ++j; |
0f2d19dd JB |
476 | } |
477 | if (j == 0) | |
478 | return scm_nullstr; | |
405aaef9 | 479 | SCM_STRING_CHARS (*tok_buf)[j] = 0; |
0f2d19dd JB |
480 | { |
481 | SCM str; | |
405aaef9 | 482 | str = scm_makfromstr (SCM_STRING_CHARS (*tok_buf), j, 0); |
0f2d19dd JB |
483 | return str; |
484 | } | |
485 | ||
486 | case'0':case '1':case '2':case '3':case '4': | |
487 | case '5':case '6':case '7':case '8':case '9': | |
488 | case '.': | |
489 | case '-': | |
490 | case '+': | |
491 | num: | |
deca31e1 | 492 | j = scm_read_token (c, tok_buf, port, 0); |
405aaef9 | 493 | p = scm_istring2number (SCM_STRING_CHARS (*tok_buf), (long) j, 10L); |
0f2d19dd JB |
494 | if (SCM_NFALSEP (p)) |
495 | return p; | |
496 | if (c == '#') | |
497 | { | |
b7f3516f | 498 | if ((j == 2) && (scm_getc (port) == '(')) |
0f2d19dd | 499 | { |
b7f3516f | 500 | scm_ungetc ('(', port); |
405aaef9 | 501 | c = SCM_STRING_CHARS (*tok_buf)[1]; |
0f2d19dd JB |
502 | goto callshrp; |
503 | } | |
405aaef9 | 504 | scm_wta (SCM_UNDEFINED, "unknown # object", SCM_STRING_CHARS (*tok_buf)); |
0f2d19dd JB |
505 | } |
506 | goto tok; | |
507 | ||
508 | case ':': | |
fee7ef83 | 509 | if (SCM_EQ_P (SCM_PACK (SCM_KEYWORD_STYLE), scm_keyword_prefix)) |
c7733771 GH |
510 | { |
511 | j = scm_read_token ('-', tok_buf, port, 0); | |
405aaef9 | 512 | p = scm_intern (SCM_STRING_CHARS (*tok_buf), j); |
c7733771 GH |
513 | return scm_make_keyword_from_dash_symbol (SCM_CAR (p)); |
514 | } | |
515 | /* fallthrough */ | |
0f2d19dd | 516 | default: |
deca31e1 | 517 | j = scm_read_token (c, tok_buf, port, 0); |
0f2d19dd JB |
518 | /* fallthrough */ |
519 | ||
520 | tok: | |
405aaef9 | 521 | p = scm_intern (SCM_STRING_CHARS (*tok_buf), j); |
0f2d19dd JB |
522 | return SCM_CAR (p); |
523 | } | |
524 | } | |
525 | ||
526 | #ifdef _UNICOS | |
527 | _Pragma ("noopt"); /* # pragma _CRI noopt */ | |
528 | #endif | |
1cc91f1b | 529 | |
0f2d19dd | 530 | scm_sizet |
6e8d25a6 | 531 | scm_read_token (int ic, SCM *tok_buf, SCM port, 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); |
405aaef9 | 538 | p = SCM_STRING_CHARS (*tok_buf); |
0f2d19dd JB |
539 | |
540 | if (weird) | |
541 | j = 0; | |
542 | else | |
543 | { | |
544 | j = 0; | |
94115ae3 | 545 | while (j + 2 >= SCM_STRING_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 | { | |
94115ae3 | 553 | while (j + 2 >= SCM_STRING_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 |
6e8d25a6 | 617 | scm_lreadparen (SCM *tok_buf, SCM port, char *name, SCM *copy) |
0f2d19dd JB |
618 | { |
619 | SCM tmp; | |
620 | SCM tl; | |
621 | SCM ans; | |
622 | int c; | |
623 | ||
624 | c = scm_flush_ws (port, name); | |
625 | if (')' == c) | |
626 | return SCM_EOL; | |
b7f3516f | 627 | scm_ungetc (c, port); |
54778cd3 | 628 | if (SCM_EQ_P (scm_sym_dot, (tmp = scm_lreadr (tok_buf, port, copy)))) |
0f2d19dd | 629 | { |
deca31e1 | 630 | ans = scm_lreadr (tok_buf, port, copy); |
0f2d19dd JB |
631 | closeit: |
632 | if (')' != (c = scm_flush_ws (port, name))) | |
633 | scm_wta (SCM_UNDEFINED, "missing close paren", ""); | |
634 | return ans; | |
635 | } | |
636 | ans = tl = scm_cons (tmp, SCM_EOL); | |
637 | while (')' != (c = scm_flush_ws (port, name))) | |
638 | { | |
b7f3516f | 639 | scm_ungetc (c, port); |
54778cd3 | 640 | if (SCM_EQ_P (scm_sym_dot, (tmp = scm_lreadr (tok_buf, port, copy)))) |
0f2d19dd | 641 | { |
deca31e1 | 642 | SCM_SETCDR (tl, scm_lreadr (tok_buf, port, copy)); |
0f2d19dd JB |
643 | goto closeit; |
644 | } | |
a6c64c3c MD |
645 | SCM_SETCDR (tl, scm_cons (tmp, SCM_EOL)); |
646 | tl = SCM_CDR (tl); | |
0f2d19dd JB |
647 | } |
648 | return ans; | |
649 | } | |
650 | ||
1cc91f1b | 651 | |
09a4f039 | 652 | SCM |
6e8d25a6 | 653 | scm_lreadrecparen (SCM *tok_buf, SCM port, char *name, SCM *copy) |
09a4f039 MD |
654 | { |
655 | register int c; | |
656 | register SCM tmp; | |
4dc2435a JB |
657 | register SCM tl, tl2 = SCM_EOL; |
658 | SCM ans, ans2 = SCM_EOL; | |
09a4f039 MD |
659 | /* Need to capture line and column numbers here. */ |
660 | int line = SCM_LINUM (port); | |
661 | int column = SCM_COL (port) - 1; | |
662 | ||
663 | c = scm_flush_ws (port, name); | |
664 | if (')' == c) | |
665 | return SCM_EOL; | |
b7f3516f | 666 | scm_ungetc (c, port); |
54778cd3 | 667 | if (SCM_EQ_P (scm_sym_dot, (tmp = scm_lreadr (tok_buf, port, copy)))) |
09a4f039 | 668 | { |
deca31e1 | 669 | ans = scm_lreadr (tok_buf, port, copy); |
09a4f039 MD |
670 | if (')' != (c = scm_flush_ws (port, name))) |
671 | scm_wta (SCM_UNDEFINED, "missing close paren", ""); | |
672 | return ans; | |
673 | } | |
674 | /* Build the head of the list structure. */ | |
675 | ans = tl = scm_cons (tmp, SCM_EOL); | |
676 | if (SCM_COPY_SOURCE_P) | |
0c95b57d | 677 | ans2 = tl2 = scm_cons (SCM_CONSP (tmp) |
09a4f039 MD |
678 | ? *copy |
679 | : tmp, | |
680 | SCM_EOL); | |
681 | while (')' != (c = scm_flush_ws (port, name))) | |
682 | { | |
62850ef3 DH |
683 | SCM new_tail; |
684 | ||
b7f3516f | 685 | scm_ungetc (c, port); |
54778cd3 | 686 | if (SCM_EQ_P (scm_sym_dot, (tmp = scm_lreadr (tok_buf, port, copy)))) |
09a4f039 | 687 | { |
deca31e1 | 688 | SCM_SETCDR (tl, tmp = scm_lreadr (tok_buf, port, copy)); |
09a4f039 | 689 | if (SCM_COPY_SOURCE_P) |
0c95b57d | 690 | SCM_SETCDR (tl2, scm_cons (SCM_CONSP (tmp) |
09a4f039 MD |
691 | ? *copy |
692 | : tmp, | |
693 | SCM_EOL)); | |
694 | if (')' != (c = scm_flush_ws (port, name))) | |
695 | scm_wta (SCM_UNDEFINED, "missing close paren", ""); | |
696 | goto exit; | |
697 | } | |
62850ef3 DH |
698 | |
699 | new_tail = scm_cons (tmp, SCM_EOL); | |
700 | SCM_SETCDR (tl, new_tail); | |
701 | tl = new_tail; | |
702 | ||
09a4f039 | 703 | if (SCM_COPY_SOURCE_P) |
62850ef3 DH |
704 | { |
705 | SCM new_tail2 = scm_cons (SCM_CONSP (tmp) ? *copy : tmp, SCM_EOL); | |
706 | SCM_SETCDR (tl2, new_tail2); | |
707 | tl2 = new_tail2; | |
708 | } | |
09a4f039 MD |
709 | } |
710 | exit: | |
711 | scm_whash_insert (scm_source_whash, | |
712 | ans, | |
713 | scm_make_srcprops (line, | |
714 | column, | |
715 | SCM_FILENAME (port), | |
716 | SCM_COPY_SOURCE_P | |
717 | ? *copy = ans2 | |
718 | : SCM_UNDEFINED, | |
719 | SCM_EOL)); | |
720 | return ans; | |
721 | } | |
722 | ||
0f2d19dd JB |
723 | |
724 | \f | |
725 | ||
14de3b42 GH |
726 | /* Manipulate the read-hash-procedures alist. This could be written in |
727 | Scheme, but maybe it will also be used by C code during initialisation. */ | |
a1ec6916 | 728 | SCM_DEFINE (scm_read_hash_extend, "read-hash-extend", 2, 0, 0, |
1bbd0b84 GB |
729 | (SCM chr, SCM proc), |
730 | "") | |
731 | #define FUNC_NAME s_scm_read_hash_extend | |
deca31e1 | 732 | { |
fed9c9a2 GH |
733 | SCM this; |
734 | SCM prev; | |
735 | ||
7866a09b | 736 | SCM_VALIDATE_CHAR (1,chr); |
fed9c9a2 | 737 | SCM_ASSERT (SCM_FALSEP (proc) || SCM_NIMP(proc), proc, SCM_ARG2, |
1bbd0b84 | 738 | FUNC_NAME); |
fed9c9a2 | 739 | |
14de3b42 GH |
740 | /* Check if chr is already in the alist. */ |
741 | this = *scm_read_hash_procedures; | |
742 | prev = SCM_BOOL_F; | |
fed9c9a2 GH |
743 | while (1) |
744 | { | |
745 | if (SCM_NULLP (this)) | |
746 | { | |
747 | /* not found, so add it to the beginning. */ | |
748 | if (SCM_NFALSEP (proc)) | |
749 | { | |
14de3b42 GH |
750 | *scm_read_hash_procedures = |
751 | scm_cons (scm_cons (chr, proc), *scm_read_hash_procedures); | |
fed9c9a2 GH |
752 | } |
753 | break; | |
754 | } | |
54778cd3 | 755 | if (SCM_EQ_P (chr, SCM_CAAR (this))) |
fed9c9a2 GH |
756 | { |
757 | /* already in the alist. */ | |
758 | if (SCM_FALSEP (proc)) | |
14de3b42 GH |
759 | { |
760 | /* remove it. */ | |
54778cd3 | 761 | if (SCM_FALSEP (prev)) |
14de3b42 GH |
762 | { |
763 | *scm_read_hash_procedures = | |
764 | SCM_CDR (*scm_read_hash_procedures); | |
765 | } | |
766 | else | |
767 | scm_set_cdr_x (prev, SCM_CDR (this)); | |
768 | } | |
fed9c9a2 | 769 | else |
14de3b42 GH |
770 | { |
771 | /* replace it. */ | |
772 | scm_set_cdr_x (SCM_CAR (this), proc); | |
773 | } | |
fed9c9a2 GH |
774 | break; |
775 | } | |
776 | prev = this; | |
777 | this = SCM_CDR (this); | |
778 | } | |
deca31e1 | 779 | |
deca31e1 GH |
780 | return SCM_UNSPECIFIED; |
781 | } | |
1bbd0b84 | 782 | #undef FUNC_NAME |
0f2d19dd | 783 | |
deca31e1 GH |
784 | /* Recover the read-hash procedure corresponding to char c. */ |
785 | static SCM | |
6e8d25a6 | 786 | scm_get_hash_procedure (int c) |
deca31e1 | 787 | { |
14de3b42 | 788 | SCM rest = *scm_read_hash_procedures; |
fed9c9a2 | 789 | |
deca31e1 GH |
790 | while (1) |
791 | { | |
792 | if (SCM_NULLP (rest)) | |
793 | return SCM_BOOL_F; | |
794 | ||
7866a09b | 795 | if (SCM_CHAR (SCM_CAAR (rest)) == c) |
deca31e1 GH |
796 | return SCM_CDAR (rest); |
797 | ||
798 | rest = SCM_CDR (rest); | |
799 | } | |
800 | } | |
1cc91f1b | 801 | |
0f2d19dd JB |
802 | void |
803 | scm_init_read () | |
0f2d19dd | 804 | { |
14de3b42 GH |
805 | scm_read_hash_procedures = |
806 | SCM_CDRLOC (scm_sysintern ("read-hash-procedures", SCM_EOL)); | |
fed9c9a2 | 807 | |
b7ff98dd | 808 | scm_init_opts (scm_read_options, scm_read_opts, SCM_N_READ_OPTIONS); |
a0599745 | 809 | #include "libguile/read.x" |
0f2d19dd | 810 | } |
89e00824 ML |
811 | |
812 | /* | |
813 | Local Variables: | |
814 | c-file-style: "gnu" | |
815 | End: | |
816 | */ |