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 | 81 | (SCM setting), |
dc7fa443 MG |
82 | "Option interface for the read options. Instead of using\n" |
83 | "this procedure directly, use the procedures @code{read-enable},\n" | |
84 | "@code{read-disable}, @code{read-set!} and @var{read-options}.") | |
1bbd0b84 | 85 | #define FUNC_NAME s_scm_read_options |
a16f6fe7 | 86 | { |
b7ff98dd MD |
87 | SCM ans = scm_options (setting, |
88 | scm_read_opts, | |
89 | SCM_N_READ_OPTIONS, | |
1bbd0b84 | 90 | FUNC_NAME); |
b7ff98dd MD |
91 | if (SCM_COPY_SOURCE_P) |
92 | SCM_RECORD_POSITIONS_P = 1; | |
a16f6fe7 MD |
93 | return ans; |
94 | } | |
1bbd0b84 | 95 | #undef FUNC_NAME |
a16f6fe7 | 96 | |
14de3b42 GH |
97 | /* An association list mapping extra hash characters to procedures. */ |
98 | static SCM *scm_read_hash_procedures; | |
deca31e1 | 99 | |
a1ec6916 | 100 | SCM_DEFINE (scm_read, "read", 0, 1, 0, |
1bbd0b84 | 101 | (SCM port), |
dc7fa443 MG |
102 | "Read an s-expression from the input port @var{port}, or from\n" |
103 | "the current input port if @var{port} is not specified.\n" | |
104 | "Any whitespace before the next token is discarded.") | |
1bbd0b84 | 105 | #define FUNC_NAME s_scm_read |
0f2d19dd JB |
106 | { |
107 | int c; | |
09a4f039 | 108 | SCM tok_buf, copy; |
0f2d19dd JB |
109 | |
110 | if (SCM_UNBNDP (port)) | |
111 | port = scm_cur_inp; | |
3b3b36dd | 112 | SCM_VALIDATE_OPINPORT (1,port); |
0f2d19dd | 113 | |
0f2d19dd JB |
114 | c = scm_flush_ws (port, (char *) NULL); |
115 | if (EOF == c) | |
116 | return SCM_EOF_VAL; | |
b7f3516f | 117 | scm_ungetc (c, port); |
0f2d19dd JB |
118 | |
119 | tok_buf = scm_makstr (30L, 0); | |
deca31e1 | 120 | return scm_lreadr (&tok_buf, port, ©); |
0f2d19dd | 121 | } |
1bbd0b84 | 122 | #undef FUNC_NAME |
0f2d19dd JB |
123 | |
124 | ||
1cc91f1b | 125 | |
0f2d19dd | 126 | char * |
6e8d25a6 | 127 | scm_grow_tok_buf (SCM *tok_buf) |
0f2d19dd | 128 | { |
94115ae3 DH |
129 | unsigned long int oldlen = SCM_STRING_LENGTH (*tok_buf); |
130 | SCM newstr = scm_makstr (2 * oldlen, 0); | |
131 | unsigned long int i; | |
132 | ||
133 | for (i = 0; i != oldlen; ++i) | |
134 | SCM_STRING_CHARS (newstr) [i] = SCM_STRING_CHARS (*tok_buf) [i]; | |
135 | ||
136 | *tok_buf = newstr; | |
137 | return SCM_STRING_CHARS (newstr); | |
0f2d19dd JB |
138 | } |
139 | ||
140 | ||
1cc91f1b | 141 | |
0f2d19dd | 142 | int |
6e8d25a6 | 143 | scm_flush_ws (SCM port, const char *eoferr) |
0f2d19dd JB |
144 | { |
145 | register int c; | |
146 | while (1) | |
b7f3516f | 147 | switch (c = scm_getc (port)) |
0f2d19dd JB |
148 | { |
149 | case EOF: | |
150 | goteof: | |
151 | if (eoferr) | |
d156d3b7 | 152 | { |
d1ca2c64 | 153 | if (!SCM_FALSEP (SCM_FILENAME (port))) |
d156d3b7 MV |
154 | scm_misc_error (eoferr, |
155 | "end of file in ~A", | |
156 | SCM_LIST1 (SCM_FILENAME (port))); | |
157 | else | |
158 | scm_misc_error (eoferr, "end of file", SCM_EOL); | |
159 | } | |
0f2d19dd JB |
160 | return c; |
161 | case ';': | |
162 | lp: | |
b7f3516f | 163 | switch (c = scm_getc (port)) |
0f2d19dd JB |
164 | { |
165 | case EOF: | |
166 | goto goteof; | |
167 | default: | |
168 | goto lp; | |
169 | case SCM_LINE_INCREMENTORS: | |
170 | break; | |
171 | } | |
172 | break; | |
173 | case SCM_LINE_INCREMENTORS: | |
0f2d19dd | 174 | case SCM_SINGLE_SPACES: |
0f2d19dd | 175 | case '\t': |
0f2d19dd JB |
176 | break; |
177 | default: | |
178 | return c; | |
179 | } | |
180 | } | |
181 | ||
182 | ||
1cc91f1b | 183 | |
0f2d19dd | 184 | int |
6e8d25a6 | 185 | scm_casei_streq (char *s1, char *s2) |
0f2d19dd JB |
186 | { |
187 | while (*s1 && *s2) | |
188 | if (scm_downcase((int)*s1) != scm_downcase((int)*s2)) | |
189 | return 0; | |
190 | else | |
191 | { | |
192 | ++s1; | |
193 | ++s2; | |
194 | } | |
195 | return !(*s1 || *s2); | |
196 | } | |
197 | ||
198 | ||
09a4f039 MD |
199 | /* recsexpr is used when recording expressions |
200 | * constructed by read:sharp. | |
201 | */ | |
604d4dd9 JB |
202 | #ifndef DEBUG_EXTENSIONS |
203 | #define recsexpr(obj, line, column, filename) (obj) | |
204 | #else | |
09a4f039 | 205 | static SCM |
1bbd0b84 | 206 | recsexpr (SCM obj,int line,int column,SCM filename) |
09a4f039 | 207 | { |
fee7ef83 | 208 | if (!SCM_CONSP(obj)) { |
09a4f039 | 209 | return obj; |
fee7ef83 | 210 | } else { |
09a4f039 MD |
211 | SCM tmp = obj, copy; |
212 | /* If this sexpr is visible in the read:sharp source, we want to | |
213 | keep that information, so only record non-constant cons cells | |
214 | which haven't previously been read by the reader. */ | |
215 | if (SCM_FALSEP (scm_whash_lookup (scm_source_whash, obj))) | |
216 | { | |
217 | if (SCM_COPY_SOURCE_P) | |
218 | { | |
219 | copy = scm_cons (recsexpr (SCM_CAR (obj), line, column, filename), | |
220 | SCM_UNDEFINED); | |
0c95b57d | 221 | while ((tmp = SCM_CDR (tmp)) && SCM_CONSP (tmp)) |
a6c64c3c MD |
222 | { |
223 | SCM_SETCDR (copy, scm_cons (recsexpr (SCM_CAR (tmp), | |
224 | line, | |
225 | column, | |
226 | filename), | |
227 | SCM_UNDEFINED)); | |
228 | copy = SCM_CDR (copy); | |
229 | } | |
230 | SCM_SETCDR (copy, tmp); | |
09a4f039 MD |
231 | } |
232 | else | |
233 | { | |
234 | recsexpr (SCM_CAR (obj), line, column, filename); | |
0c95b57d | 235 | while ((tmp = SCM_CDR (tmp)) && SCM_CONSP (tmp)) |
09a4f039 MD |
236 | recsexpr (SCM_CAR (tmp), line, column, filename); |
237 | copy = SCM_UNDEFINED; | |
238 | } | |
239 | scm_whash_insert (scm_source_whash, | |
240 | obj, | |
241 | scm_make_srcprops (line, | |
242 | column, | |
243 | filename, | |
244 | copy, | |
245 | SCM_EOL)); | |
246 | } | |
247 | return obj; | |
248 | } | |
249 | } | |
604d4dd9 | 250 | #endif |
f9c68a47 JB |
251 | |
252 | /* Consume an SCSH-style block comment. Assume that we've already | |
f9731264 JB |
253 | read the initial `#!', and eat characters until we get a |
254 | newline/exclamation-point/sharp-sign/newline sequence. */ | |
f9c68a47 JB |
255 | |
256 | static void | |
6e8d25a6 | 257 | skip_scsh_block_comment (SCM port) |
db4b4ca6 | 258 | #define FUNC_NAME "skip_scsh_block_comment" |
f9c68a47 | 259 | { |
f9731264 JB |
260 | /* Is this portable? Dear God, spare me from the non-eight-bit |
261 | characters. But is it tasteful? */ | |
262 | long history = 0; | |
f9c68a47 JB |
263 | |
264 | for (;;) | |
265 | { | |
b7f3516f | 266 | int c = scm_getc (port); |
f9c68a47 JB |
267 | |
268 | if (c == EOF) | |
db4b4ca6 | 269 | SCM_MISC_ERROR ("unterminated `#! ... !#' comment", SCM_EOL); |
f9731264 | 270 | history = ((history << 8) | (c & 0xff)) & 0xffffffff; |
f9c68a47 | 271 | |
f9731264 JB |
272 | /* Were the last four characters read "\n!#\n"? */ |
273 | if (history == (('\n' << 24) | ('!' << 16) | ('#' << 8) | '\n')) | |
274 | return; | |
f9c68a47 JB |
275 | } |
276 | } | |
db4b4ca6 DH |
277 | #undef FUNC_NAME |
278 | ||
f9c68a47 | 279 | |
1bbd0b84 | 280 | static SCM scm_get_hash_procedure(int c); |
f9c68a47 | 281 | |
09a4f039 | 282 | static char s_list[]="list"; |
1cc91f1b | 283 | |
0f2d19dd | 284 | SCM |
1bbd0b84 | 285 | scm_lreadr (SCM *tok_buf,SCM port,SCM *copy) |
db4b4ca6 | 286 | #define FUNC_NAME "scm_lreadr" |
0f2d19dd JB |
287 | { |
288 | int c; | |
289 | scm_sizet j; | |
290 | SCM p; | |
deca31e1 | 291 | |
0f2d19dd | 292 | tryagain: |
1bbd0b84 | 293 | c = scm_flush_ws (port, s_scm_read); |
b6356af7 | 294 | tryagain_no_flush_ws: |
0f2d19dd JB |
295 | switch (c) |
296 | { | |
297 | case EOF: | |
298 | return SCM_EOF_VAL; | |
299 | ||
300 | case '(': | |
09a4f039 | 301 | return SCM_RECORD_POSITIONS_P |
deca31e1 GH |
302 | ? scm_lreadrecparen (tok_buf, port, s_list, copy) |
303 | : scm_lreadparen (tok_buf, port, s_list, copy); | |
0f2d19dd | 304 | case ')': |
db4b4ca6 | 305 | SCM_MISC_ERROR ("unexpected \")\"", SCM_EOL); |
0f2d19dd JB |
306 | goto tryagain; |
307 | ||
308 | case '\'': | |
92e5aa0e | 309 | p = scm_sym_quote; |
09a4f039 | 310 | goto recquote; |
0f2d19dd | 311 | case '`': |
92e5aa0e | 312 | p = scm_sym_quasiquote; |
09a4f039 | 313 | goto recquote; |
0f2d19dd | 314 | case ',': |
b7f3516f | 315 | c = scm_getc (port); |
0f2d19dd | 316 | if ('@' == c) |
92e5aa0e | 317 | p = scm_sym_uq_splicing; |
0f2d19dd JB |
318 | else |
319 | { | |
b7f3516f | 320 | scm_ungetc (c, port); |
92e5aa0e | 321 | p = scm_sym_unquote; |
0f2d19dd | 322 | } |
09a4f039 MD |
323 | recquote: |
324 | p = scm_cons2 (p, | |
deca31e1 | 325 | scm_lreadr (tok_buf, port, copy), |
09a4f039 MD |
326 | SCM_EOL); |
327 | if (SCM_RECORD_POSITIONS_P) | |
328 | scm_whash_insert (scm_source_whash, | |
329 | p, | |
330 | scm_make_srcprops (SCM_LINUM (port), | |
331 | SCM_COL (port) - 1, | |
332 | SCM_FILENAME (port), | |
333 | SCM_COPY_SOURCE_P | |
334 | ? (*copy = scm_cons2 (SCM_CAR (p), | |
335 | SCM_CAR (SCM_CDR (p)), | |
336 | SCM_EOL)) | |
337 | : SCM_UNDEFINED, | |
338 | SCM_EOL)); | |
339 | return p; | |
0f2d19dd | 340 | case '#': |
b7f3516f | 341 | c = scm_getc (port); |
0f2d19dd JB |
342 | switch (c) |
343 | { | |
344 | case '(': | |
deca31e1 | 345 | p = scm_lreadparen (tok_buf, port, "vector", copy); |
0f2d19dd JB |
346 | return SCM_NULLP (p) ? scm_nullvect : scm_vector (p); |
347 | ||
348 | case 't': | |
349 | case 'T': | |
350 | return SCM_BOOL_T; | |
351 | case 'f': | |
352 | case 'F': | |
353 | return SCM_BOOL_F; | |
354 | ||
355 | case 'b': | |
356 | case 'B': | |
357 | case 'o': | |
358 | case 'O': | |
359 | case 'd': | |
360 | case 'D': | |
361 | case 'x': | |
362 | case 'X': | |
363 | case 'i': | |
364 | case 'I': | |
365 | case 'e': | |
366 | case 'E': | |
b7f3516f | 367 | scm_ungetc (c, port); |
0f2d19dd JB |
368 | c = '#'; |
369 | goto num; | |
370 | ||
f9c68a47 JB |
371 | case '!': |
372 | /* start of a shell script. Parse as a block comment, | |
373 | terminated by !#, just like SCSH. */ | |
374 | skip_scsh_block_comment (port); | |
b6356af7 MV |
375 | /* EOF is not an error here */ |
376 | c = scm_flush_ws (port, (char *)NULL); | |
377 | goto tryagain_no_flush_ws; | |
f9c68a47 | 378 | |
afe5177e | 379 | #ifdef HAVE_ARRAYS |
0f2d19dd | 380 | case '*': |
deca31e1 | 381 | j = scm_read_token (c, tok_buf, port, 0); |
405aaef9 | 382 | p = scm_istr2bve (SCM_STRING_CHARS (*tok_buf) + 1, (long) (j - 1)); |
0f2d19dd JB |
383 | if (SCM_NFALSEP (p)) |
384 | return p; | |
385 | else | |
386 | goto unkshrp; | |
afe5177e | 387 | #endif |
0f2d19dd JB |
388 | |
389 | case '{': | |
deca31e1 | 390 | j = scm_read_token (c, tok_buf, port, 1); |
38ae064c | 391 | return scm_mem2symbol (SCM_STRING_CHARS (*tok_buf), j); |
0f2d19dd JB |
392 | |
393 | case '\\': | |
b7f3516f | 394 | c = scm_getc (port); |
deca31e1 | 395 | j = scm_read_token (c, tok_buf, port, 0); |
0f2d19dd | 396 | if (j == 1) |
7866a09b | 397 | return SCM_MAKE_CHAR (c); |
0f2d19dd JB |
398 | if (c >= '0' && c < '8') |
399 | { | |
405aaef9 | 400 | p = scm_istr2int (SCM_STRING_CHARS (*tok_buf), (long) j, 8); |
0f2d19dd | 401 | if (SCM_NFALSEP (p)) |
7866a09b | 402 | return SCM_MAKE_CHAR (SCM_INUM (p)); |
0f2d19dd JB |
403 | } |
404 | for (c = 0; c < scm_n_charnames; c++) | |
405 | if (scm_charnames[c] | |
405aaef9 | 406 | && (scm_casei_streq (scm_charnames[c], SCM_STRING_CHARS (*tok_buf)))) |
7866a09b | 407 | return SCM_MAKE_CHAR (scm_charnums[c]); |
db4b4ca6 | 408 | SCM_MISC_ERROR ("unknown # object", SCM_EOL); |
0f2d19dd | 409 | |
50a095f1 JB |
410 | /* #:SYMBOL is a syntax for keywords supported in all contexts. */ |
411 | case ':': | |
412 | j = scm_read_token ('-', tok_buf, port, 0); | |
38ae064c DH |
413 | p = scm_mem2symbol (SCM_STRING_CHARS (*tok_buf), j); |
414 | return scm_make_keyword_from_dash_symbol (p); | |
0f2d19dd JB |
415 | |
416 | default: | |
417 | callshrp: | |
deca31e1 GH |
418 | { |
419 | SCM sharp = scm_get_hash_procedure (c); | |
420 | ||
421 | if (SCM_NIMP (sharp)) | |
422 | { | |
423 | int line = SCM_LINUM (port); | |
424 | int column = SCM_COL (port) - 2; | |
425 | SCM got; | |
426 | ||
427 | got = scm_apply (sharp, | |
7866a09b | 428 | SCM_MAKE_CHAR (c), |
deca31e1 | 429 | scm_acons (port, SCM_EOL, SCM_EOL)); |
54778cd3 | 430 | if (SCM_EQ_P (got, SCM_UNSPECIFIED)) |
deca31e1 GH |
431 | goto unkshrp; |
432 | if (SCM_RECORD_POSITIONS_P) | |
433 | return *copy = recsexpr (got, line, column, | |
434 | SCM_FILENAME (port)); | |
435 | else | |
436 | return got; | |
437 | } | |
438 | } | |
03bc4386 | 439 | unkshrp: |
70d63753 | 440 | scm_misc_error (s_scm_read, "Unknown # object: ~S", |
e0c08f17 | 441 | SCM_LIST1 (SCM_MAKE_CHAR (c))); |
0f2d19dd JB |
442 | } |
443 | ||
444 | case '"': | |
445 | j = 0; | |
b7f3516f | 446 | while ('"' != (c = scm_getc (port))) |
0f2d19dd | 447 | { |
b3fcac34 DH |
448 | if (c == EOF) |
449 | SCM_MISC_ERROR ("end of file in string constant", SCM_EOL); | |
0f2d19dd | 450 | |
94115ae3 | 451 | while (j + 2 >= SCM_STRING_LENGTH (*tok_buf)) |
0f2d19dd JB |
452 | scm_grow_tok_buf (tok_buf); |
453 | ||
454 | if (c == '\\') | |
b7f3516f | 455 | switch (c = scm_getc (port)) |
0f2d19dd JB |
456 | { |
457 | case '\n': | |
458 | continue; | |
459 | case '0': | |
460 | c = '\0'; | |
461 | break; | |
462 | case 'f': | |
463 | c = '\f'; | |
464 | break; | |
465 | case 'n': | |
466 | c = '\n'; | |
467 | break; | |
468 | case 'r': | |
469 | c = '\r'; | |
470 | break; | |
471 | case 't': | |
472 | c = '\t'; | |
473 | break; | |
474 | case 'a': | |
475 | c = '\007'; | |
476 | break; | |
477 | case 'v': | |
478 | c = '\v'; | |
479 | break; | |
480 | } | |
405aaef9 | 481 | SCM_STRING_CHARS (*tok_buf)[j] = c; |
b7f3516f | 482 | ++j; |
0f2d19dd JB |
483 | } |
484 | if (j == 0) | |
485 | return scm_nullstr; | |
405aaef9 | 486 | SCM_STRING_CHARS (*tok_buf)[j] = 0; |
0f2d19dd JB |
487 | { |
488 | SCM str; | |
405aaef9 | 489 | str = scm_makfromstr (SCM_STRING_CHARS (*tok_buf), j, 0); |
0f2d19dd JB |
490 | return str; |
491 | } | |
492 | ||
493 | case'0':case '1':case '2':case '3':case '4': | |
494 | case '5':case '6':case '7':case '8':case '9': | |
495 | case '.': | |
496 | case '-': | |
497 | case '+': | |
498 | num: | |
deca31e1 | 499 | j = scm_read_token (c, tok_buf, port, 0); |
405aaef9 | 500 | p = scm_istring2number (SCM_STRING_CHARS (*tok_buf), (long) j, 10L); |
0f2d19dd JB |
501 | if (SCM_NFALSEP (p)) |
502 | return p; | |
503 | if (c == '#') | |
504 | { | |
b7f3516f | 505 | if ((j == 2) && (scm_getc (port) == '(')) |
0f2d19dd | 506 | { |
b7f3516f | 507 | scm_ungetc ('(', port); |
405aaef9 | 508 | c = SCM_STRING_CHARS (*tok_buf)[1]; |
0f2d19dd JB |
509 | goto callshrp; |
510 | } | |
db4b4ca6 | 511 | SCM_MISC_ERROR ("unknown # object", SCM_EOL); |
0f2d19dd JB |
512 | } |
513 | goto tok; | |
514 | ||
515 | case ':': | |
fee7ef83 | 516 | if (SCM_EQ_P (SCM_PACK (SCM_KEYWORD_STYLE), scm_keyword_prefix)) |
c7733771 GH |
517 | { |
518 | j = scm_read_token ('-', tok_buf, port, 0); | |
38ae064c DH |
519 | p = scm_mem2symbol (SCM_STRING_CHARS (*tok_buf), j); |
520 | return scm_make_keyword_from_dash_symbol (p); | |
c7733771 GH |
521 | } |
522 | /* fallthrough */ | |
0f2d19dd | 523 | default: |
deca31e1 | 524 | j = scm_read_token (c, tok_buf, port, 0); |
0f2d19dd JB |
525 | /* fallthrough */ |
526 | ||
527 | tok: | |
38ae064c | 528 | return scm_mem2symbol (SCM_STRING_CHARS (*tok_buf), j); |
0f2d19dd JB |
529 | } |
530 | } | |
db4b4ca6 DH |
531 | #undef FUNC_NAME |
532 | ||
0f2d19dd JB |
533 | |
534 | #ifdef _UNICOS | |
535 | _Pragma ("noopt"); /* # pragma _CRI noopt */ | |
536 | #endif | |
1cc91f1b | 537 | |
0f2d19dd | 538 | scm_sizet |
6e8d25a6 | 539 | scm_read_token (int ic, SCM *tok_buf, SCM port, int weird) |
0f2d19dd JB |
540 | { |
541 | register scm_sizet j; | |
542 | register int c; | |
543 | register char *p; | |
544 | ||
deca31e1 | 545 | c = (SCM_CASE_INSENSITIVE_P ? scm_downcase(ic) : ic); |
405aaef9 | 546 | p = SCM_STRING_CHARS (*tok_buf); |
0f2d19dd JB |
547 | |
548 | if (weird) | |
549 | j = 0; | |
550 | else | |
551 | { | |
552 | j = 0; | |
94115ae3 | 553 | while (j + 2 >= SCM_STRING_LENGTH (*tok_buf)) |
0f2d19dd | 554 | p = scm_grow_tok_buf (tok_buf); |
b7f3516f TT |
555 | p[j] = c; |
556 | ++j; | |
0f2d19dd JB |
557 | } |
558 | ||
559 | while (1) | |
560 | { | |
94115ae3 | 561 | while (j + 2 >= SCM_STRING_LENGTH (*tok_buf)) |
0f2d19dd | 562 | p = scm_grow_tok_buf (tok_buf); |
b7f3516f | 563 | c = scm_getc (port); |
0f2d19dd JB |
564 | switch (c) |
565 | { | |
566 | case '(': | |
567 | case ')': | |
568 | case '"': | |
569 | case ';': | |
570 | case SCM_WHITE_SPACES: | |
571 | case SCM_LINE_INCREMENTORS: | |
572 | if (weird) | |
573 | goto default_case; | |
574 | ||
b7f3516f | 575 | scm_ungetc (c, port); |
0f2d19dd JB |
576 | case EOF: |
577 | eof_case: | |
578 | p[j] = 0; | |
579 | return j; | |
580 | case '\\': | |
581 | if (!weird) | |
582 | goto default_case; | |
583 | else | |
584 | { | |
b7f3516f | 585 | c = scm_getc (port); |
0f2d19dd JB |
586 | if (c == EOF) |
587 | goto eof_case; | |
588 | else | |
589 | goto default_case; | |
590 | } | |
591 | case '}': | |
592 | if (!weird) | |
593 | goto default_case; | |
594 | ||
b7f3516f | 595 | c = scm_getc (port); |
0f2d19dd JB |
596 | if (c == '#') |
597 | { | |
598 | p[j] = 0; | |
599 | return j; | |
600 | } | |
601 | else | |
602 | { | |
b7f3516f | 603 | scm_ungetc (c, port); |
0f2d19dd JB |
604 | c = '}'; |
605 | goto default_case; | |
606 | } | |
607 | ||
608 | default: | |
609 | default_case: | |
610 | { | |
deca31e1 | 611 | c = (SCM_CASE_INSENSITIVE_P ? scm_downcase(c) : c); |
b7f3516f TT |
612 | p[j] = c; |
613 | ++j; | |
0f2d19dd JB |
614 | } |
615 | ||
616 | } | |
617 | } | |
618 | } | |
1cc91f1b | 619 | |
0f2d19dd JB |
620 | #ifdef _UNICOS |
621 | _Pragma ("opt"); /* # pragma _CRI opt */ | |
622 | #endif | |
623 | ||
0f2d19dd | 624 | SCM |
6e8d25a6 | 625 | scm_lreadparen (SCM *tok_buf, SCM port, char *name, SCM *copy) |
db4b4ca6 | 626 | #define FUNC_NAME "scm_lreadparen" |
0f2d19dd JB |
627 | { |
628 | SCM tmp; | |
629 | SCM tl; | |
630 | SCM ans; | |
631 | int c; | |
632 | ||
633 | c = scm_flush_ws (port, name); | |
634 | if (')' == c) | |
635 | return SCM_EOL; | |
b7f3516f | 636 | scm_ungetc (c, port); |
54778cd3 | 637 | if (SCM_EQ_P (scm_sym_dot, (tmp = scm_lreadr (tok_buf, port, copy)))) |
0f2d19dd | 638 | { |
deca31e1 | 639 | ans = scm_lreadr (tok_buf, port, copy); |
0f2d19dd JB |
640 | closeit: |
641 | if (')' != (c = scm_flush_ws (port, name))) | |
db4b4ca6 | 642 | SCM_MISC_ERROR ("missing close paren", SCM_EOL); |
0f2d19dd JB |
643 | return ans; |
644 | } | |
645 | ans = tl = scm_cons (tmp, SCM_EOL); | |
646 | while (')' != (c = scm_flush_ws (port, name))) | |
647 | { | |
b7f3516f | 648 | scm_ungetc (c, port); |
54778cd3 | 649 | if (SCM_EQ_P (scm_sym_dot, (tmp = scm_lreadr (tok_buf, port, copy)))) |
0f2d19dd | 650 | { |
deca31e1 | 651 | SCM_SETCDR (tl, scm_lreadr (tok_buf, port, copy)); |
0f2d19dd JB |
652 | goto closeit; |
653 | } | |
a6c64c3c MD |
654 | SCM_SETCDR (tl, scm_cons (tmp, SCM_EOL)); |
655 | tl = SCM_CDR (tl); | |
0f2d19dd JB |
656 | } |
657 | return ans; | |
658 | } | |
db4b4ca6 | 659 | #undef FUNC_NAME |
0f2d19dd | 660 | |
1cc91f1b | 661 | |
09a4f039 | 662 | SCM |
6e8d25a6 | 663 | scm_lreadrecparen (SCM *tok_buf, SCM port, char *name, SCM *copy) |
db4b4ca6 | 664 | #define FUNC_NAME "scm_lreadrecparen" |
09a4f039 MD |
665 | { |
666 | register int c; | |
667 | register SCM tmp; | |
4dc2435a JB |
668 | register SCM tl, tl2 = SCM_EOL; |
669 | SCM ans, ans2 = SCM_EOL; | |
09a4f039 MD |
670 | /* Need to capture line and column numbers here. */ |
671 | int line = SCM_LINUM (port); | |
672 | int column = SCM_COL (port) - 1; | |
673 | ||
674 | c = scm_flush_ws (port, name); | |
675 | if (')' == c) | |
676 | return SCM_EOL; | |
b7f3516f | 677 | scm_ungetc (c, port); |
54778cd3 | 678 | if (SCM_EQ_P (scm_sym_dot, (tmp = scm_lreadr (tok_buf, port, copy)))) |
09a4f039 | 679 | { |
deca31e1 | 680 | ans = scm_lreadr (tok_buf, port, copy); |
09a4f039 | 681 | if (')' != (c = scm_flush_ws (port, name))) |
db4b4ca6 | 682 | SCM_MISC_ERROR ("missing close paren", SCM_EOL); |
09a4f039 MD |
683 | return ans; |
684 | } | |
685 | /* Build the head of the list structure. */ | |
686 | ans = tl = scm_cons (tmp, SCM_EOL); | |
687 | if (SCM_COPY_SOURCE_P) | |
0c95b57d | 688 | ans2 = tl2 = scm_cons (SCM_CONSP (tmp) |
09a4f039 MD |
689 | ? *copy |
690 | : tmp, | |
691 | SCM_EOL); | |
692 | while (')' != (c = scm_flush_ws (port, name))) | |
693 | { | |
62850ef3 DH |
694 | SCM new_tail; |
695 | ||
b7f3516f | 696 | scm_ungetc (c, port); |
54778cd3 | 697 | if (SCM_EQ_P (scm_sym_dot, (tmp = scm_lreadr (tok_buf, port, copy)))) |
09a4f039 | 698 | { |
deca31e1 | 699 | SCM_SETCDR (tl, tmp = scm_lreadr (tok_buf, port, copy)); |
09a4f039 | 700 | if (SCM_COPY_SOURCE_P) |
0c95b57d | 701 | SCM_SETCDR (tl2, scm_cons (SCM_CONSP (tmp) |
09a4f039 MD |
702 | ? *copy |
703 | : tmp, | |
704 | SCM_EOL)); | |
705 | if (')' != (c = scm_flush_ws (port, name))) | |
db4b4ca6 | 706 | SCM_MISC_ERROR ("missing close paren", SCM_EOL); |
09a4f039 MD |
707 | goto exit; |
708 | } | |
62850ef3 DH |
709 | |
710 | new_tail = scm_cons (tmp, SCM_EOL); | |
711 | SCM_SETCDR (tl, new_tail); | |
712 | tl = new_tail; | |
713 | ||
09a4f039 | 714 | if (SCM_COPY_SOURCE_P) |
62850ef3 DH |
715 | { |
716 | SCM new_tail2 = scm_cons (SCM_CONSP (tmp) ? *copy : tmp, SCM_EOL); | |
717 | SCM_SETCDR (tl2, new_tail2); | |
718 | tl2 = new_tail2; | |
719 | } | |
09a4f039 MD |
720 | } |
721 | exit: | |
722 | scm_whash_insert (scm_source_whash, | |
723 | ans, | |
724 | scm_make_srcprops (line, | |
725 | column, | |
726 | SCM_FILENAME (port), | |
727 | SCM_COPY_SOURCE_P | |
728 | ? *copy = ans2 | |
729 | : SCM_UNDEFINED, | |
730 | SCM_EOL)); | |
731 | return ans; | |
732 | } | |
db4b4ca6 | 733 | #undef FUNC_NAME |
09a4f039 | 734 | |
0f2d19dd JB |
735 | |
736 | \f | |
737 | ||
14de3b42 GH |
738 | /* Manipulate the read-hash-procedures alist. This could be written in |
739 | Scheme, but maybe it will also be used by C code during initialisation. */ | |
a1ec6916 | 740 | SCM_DEFINE (scm_read_hash_extend, "read-hash-extend", 2, 0, 0, |
1bbd0b84 | 741 | (SCM chr, SCM proc), |
dc7fa443 MG |
742 | "Install the procedure @var{proc} for reading expressions\n" |
743 | "starting with the character sequence @code{#} and @var{chr}.\n" | |
744 | "@var{proc} will be called with two arguments: the character\n" | |
745 | "@var{chr} and the port to read further data from. The object\n" | |
746 | "returned will be the return value of @code{read}.") | |
1bbd0b84 | 747 | #define FUNC_NAME s_scm_read_hash_extend |
deca31e1 | 748 | { |
fed9c9a2 GH |
749 | SCM this; |
750 | SCM prev; | |
751 | ||
7866a09b | 752 | SCM_VALIDATE_CHAR (1,chr); |
fed9c9a2 | 753 | SCM_ASSERT (SCM_FALSEP (proc) || SCM_NIMP(proc), proc, SCM_ARG2, |
1bbd0b84 | 754 | FUNC_NAME); |
fed9c9a2 | 755 | |
14de3b42 GH |
756 | /* Check if chr is already in the alist. */ |
757 | this = *scm_read_hash_procedures; | |
758 | prev = SCM_BOOL_F; | |
fed9c9a2 GH |
759 | while (1) |
760 | { | |
761 | if (SCM_NULLP (this)) | |
762 | { | |
763 | /* not found, so add it to the beginning. */ | |
764 | if (SCM_NFALSEP (proc)) | |
765 | { | |
14de3b42 GH |
766 | *scm_read_hash_procedures = |
767 | scm_cons (scm_cons (chr, proc), *scm_read_hash_procedures); | |
fed9c9a2 GH |
768 | } |
769 | break; | |
770 | } | |
54778cd3 | 771 | if (SCM_EQ_P (chr, SCM_CAAR (this))) |
fed9c9a2 GH |
772 | { |
773 | /* already in the alist. */ | |
774 | if (SCM_FALSEP (proc)) | |
14de3b42 GH |
775 | { |
776 | /* remove it. */ | |
54778cd3 | 777 | if (SCM_FALSEP (prev)) |
14de3b42 GH |
778 | { |
779 | *scm_read_hash_procedures = | |
780 | SCM_CDR (*scm_read_hash_procedures); | |
781 | } | |
782 | else | |
783 | scm_set_cdr_x (prev, SCM_CDR (this)); | |
784 | } | |
fed9c9a2 | 785 | else |
14de3b42 GH |
786 | { |
787 | /* replace it. */ | |
788 | scm_set_cdr_x (SCM_CAR (this), proc); | |
789 | } | |
fed9c9a2 GH |
790 | break; |
791 | } | |
792 | prev = this; | |
793 | this = SCM_CDR (this); | |
794 | } | |
deca31e1 | 795 | |
deca31e1 GH |
796 | return SCM_UNSPECIFIED; |
797 | } | |
1bbd0b84 | 798 | #undef FUNC_NAME |
0f2d19dd | 799 | |
deca31e1 GH |
800 | /* Recover the read-hash procedure corresponding to char c. */ |
801 | static SCM | |
6e8d25a6 | 802 | scm_get_hash_procedure (int c) |
deca31e1 | 803 | { |
14de3b42 | 804 | SCM rest = *scm_read_hash_procedures; |
fed9c9a2 | 805 | |
deca31e1 GH |
806 | while (1) |
807 | { | |
808 | if (SCM_NULLP (rest)) | |
809 | return SCM_BOOL_F; | |
810 | ||
7866a09b | 811 | if (SCM_CHAR (SCM_CAAR (rest)) == c) |
deca31e1 GH |
812 | return SCM_CDAR (rest); |
813 | ||
814 | rest = SCM_CDR (rest); | |
815 | } | |
816 | } | |
1cc91f1b | 817 | |
0f2d19dd JB |
818 | void |
819 | scm_init_read () | |
0f2d19dd | 820 | { |
14de3b42 GH |
821 | scm_read_hash_procedures = |
822 | SCM_CDRLOC (scm_sysintern ("read-hash-procedures", SCM_EOL)); | |
fed9c9a2 | 823 | |
b7ff98dd | 824 | scm_init_opts (scm_read_options, scm_read_opts, SCM_N_READ_OPTIONS); |
8dc9439f | 825 | #ifndef SCM_MAGIC_SNARFER |
a0599745 | 826 | #include "libguile/read.x" |
8dc9439f | 827 | #endif |
0f2d19dd | 828 | } |
89e00824 ML |
829 | |
830 | /* | |
831 | Local Variables: | |
832 | c-file-style: "gnu" | |
833 | End: | |
834 | */ |