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10692477 | 1 | /* MD reader for GCC. |
818ab71a | 2 | Copyright (C) 1987-2016 Free Software Foundation, Inc. |
10692477 RS |
3 | |
4 | This file is part of GCC. | |
5 | ||
6 | GCC is free software; you can redistribute it and/or modify it under | |
7 | the terms of the GNU General Public License as published by the Free | |
8 | Software Foundation; either version 3, or (at your option) any later | |
9 | version. | |
10 | ||
11 | GCC is distributed in the hope that it will be useful, but WITHOUT ANY | |
12 | WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
13 | FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
14 | for more details. | |
15 | ||
16 | You should have received a copy of the GNU General Public License | |
17 | along with GCC; see the file COPYING3. If not see | |
18 | <http://www.gnu.org/licenses/>. */ | |
19 | ||
20 | #include "bconfig.h" | |
21 | #include "system.h" | |
22 | #include "coretypes.h" | |
bb933490 | 23 | #include "errors.h" |
b78027d1 DM |
24 | #include "statistics.h" |
25 | #include "vec.h" | |
10692477 RS |
26 | #include "read-md.h" |
27 | ||
28 | /* Associates PTR (which can be a string, etc.) with the file location | |
29 | specified by FILENAME and LINENO. */ | |
30 | struct ptr_loc { | |
31 | const void *ptr; | |
32 | const char *filename; | |
33 | int lineno; | |
34 | }; | |
35 | ||
600ab3fc RS |
36 | /* This callback will be invoked whenever an md include directive is |
37 | processed. To be used for creation of the dependency file. */ | |
38 | void (*include_callback) (const char *); | |
39 | ||
812b1403 DM |
40 | /* Global singleton. */ |
41 | ||
42 | rtx_reader *rtx_reader_ptr; | |
600ab3fc | 43 | |
9f418533 RS |
44 | /* Given an object that starts with a char * name field, return a hash |
45 | code for its name. */ | |
46 | ||
47 | hashval_t | |
48 | leading_string_hash (const void *def) | |
49 | { | |
50 | return htab_hash_string (*(const char *const *) def); | |
51 | } | |
52 | ||
53 | /* Given two objects that start with char * name fields, return true if | |
54 | they have the same name. */ | |
55 | ||
56 | int | |
57 | leading_string_eq_p (const void *def1, const void *def2) | |
58 | { | |
59 | return strcmp (*(const char *const *) def1, | |
60 | *(const char *const *) def2) == 0; | |
61 | } | |
62 | ||
10692477 RS |
63 | /* Return a hash value for the pointer pointed to by DEF. */ |
64 | ||
65 | static hashval_t | |
66 | leading_ptr_hash (const void *def) | |
67 | { | |
68 | return htab_hash_pointer (*(const void *const *) def); | |
69 | } | |
70 | ||
71 | /* Return true if DEF1 and DEF2 are pointers to the same pointer. */ | |
72 | ||
73 | static int | |
74 | leading_ptr_eq_p (const void *def1, const void *def2) | |
75 | { | |
76 | return *(const void *const *) def1 == *(const void *const *) def2; | |
77 | } | |
78 | ||
79 | /* Associate PTR with the file position given by FILENAME and LINENO. */ | |
80 | ||
b78027d1 DM |
81 | void |
82 | rtx_reader::set_md_ptr_loc (const void *ptr, const char *filename, int lineno) | |
10692477 RS |
83 | { |
84 | struct ptr_loc *loc; | |
85 | ||
b78027d1 | 86 | loc = (struct ptr_loc *) obstack_alloc (&m_ptr_loc_obstack, |
10692477 RS |
87 | sizeof (struct ptr_loc)); |
88 | loc->ptr = ptr; | |
89 | loc->filename = filename; | |
90 | loc->lineno = lineno; | |
b78027d1 | 91 | *htab_find_slot (m_ptr_locs, loc, INSERT) = loc; |
10692477 RS |
92 | } |
93 | ||
94 | /* Return the position associated with pointer PTR. Return null if no | |
95 | position was set. */ | |
96 | ||
b78027d1 DM |
97 | const struct ptr_loc * |
98 | rtx_reader::get_md_ptr_loc (const void *ptr) | |
10692477 | 99 | { |
b78027d1 | 100 | return (const struct ptr_loc *) htab_find (m_ptr_locs, &ptr); |
10692477 RS |
101 | } |
102 | ||
103 | /* Associate NEW_PTR with the same file position as OLD_PTR. */ | |
104 | ||
105 | void | |
b78027d1 | 106 | rtx_reader::copy_md_ptr_loc (const void *new_ptr, const void *old_ptr) |
10692477 | 107 | { |
d2a3ce4e | 108 | const struct ptr_loc *loc = get_md_ptr_loc (old_ptr); |
10692477 | 109 | if (loc != 0) |
d2a3ce4e | 110 | set_md_ptr_loc (new_ptr, loc->filename, loc->lineno); |
10692477 RS |
111 | } |
112 | ||
113 | /* If PTR is associated with a known file position, print a #line | |
41723253 | 114 | directive for it to OUTF. */ |
10692477 RS |
115 | |
116 | void | |
b78027d1 | 117 | rtx_reader::fprint_md_ptr_loc (FILE *outf, const void *ptr) |
10692477 | 118 | { |
d2a3ce4e | 119 | const struct ptr_loc *loc = get_md_ptr_loc (ptr); |
10692477 | 120 | if (loc != 0) |
41723253 SB |
121 | fprintf (outf, "#line %d \"%s\"\n", loc->lineno, loc->filename); |
122 | } | |
123 | ||
124 | /* Special fprint_md_ptr_loc for writing to STDOUT. */ | |
125 | void | |
b78027d1 | 126 | rtx_reader::print_md_ptr_loc (const void *ptr) |
41723253 SB |
127 | { |
128 | fprint_md_ptr_loc (stdout, ptr); | |
10692477 RS |
129 | } |
130 | ||
131 | /* Return a condition that satisfies both COND1 and COND2. Either string | |
132 | may be null or empty. */ | |
133 | ||
134 | const char * | |
b78027d1 | 135 | rtx_reader::join_c_conditions (const char *cond1, const char *cond2) |
10692477 RS |
136 | { |
137 | char *result; | |
138 | const void **entry; | |
139 | ||
140 | if (cond1 == 0 || cond1[0] == 0) | |
141 | return cond2; | |
142 | ||
143 | if (cond2 == 0 || cond2[0] == 0) | |
144 | return cond1; | |
145 | ||
146 | if (strcmp (cond1, cond2) == 0) | |
147 | return cond1; | |
148 | ||
149 | result = concat ("(", cond1, ") && (", cond2, ")", NULL); | |
b78027d1 DM |
150 | obstack_ptr_grow (&m_joined_conditions_obstack, result); |
151 | obstack_ptr_grow (&m_joined_conditions_obstack, cond1); | |
152 | obstack_ptr_grow (&m_joined_conditions_obstack, cond2); | |
153 | entry = XOBFINISH (&m_joined_conditions_obstack, const void **); | |
154 | *htab_find_slot (m_joined_conditions, entry, INSERT) = entry; | |
10692477 RS |
155 | return result; |
156 | } | |
157 | ||
41723253 SB |
158 | /* Print condition COND to OUTF, wrapped in brackets. If COND was created |
159 | by join_c_conditions, recursively invoke this function for the original | |
10692477 RS |
160 | conditions and join the result with "&&". Otherwise print a #line |
161 | directive for COND if its original file position is known. */ | |
162 | ||
163 | void | |
b78027d1 | 164 | rtx_reader::fprint_c_condition (FILE *outf, const char *cond) |
10692477 | 165 | { |
b78027d1 | 166 | const char **halves = (const char **) htab_find (m_joined_conditions, &cond); |
10692477 RS |
167 | if (halves != 0) |
168 | { | |
41723253 SB |
169 | fprintf (outf, "("); |
170 | fprint_c_condition (outf, halves[1]); | |
171 | fprintf (outf, " && "); | |
172 | fprint_c_condition (outf, halves[2]); | |
173 | fprintf (outf, ")"); | |
10692477 RS |
174 | } |
175 | else | |
176 | { | |
41723253 SB |
177 | fputc ('\n', outf); |
178 | fprint_md_ptr_loc (outf, cond); | |
179 | fprintf (outf, "(%s)", cond); | |
10692477 RS |
180 | } |
181 | } | |
182 | ||
41723253 SB |
183 | /* Special fprint_c_condition for writing to STDOUT. */ |
184 | ||
185 | void | |
b78027d1 | 186 | rtx_reader::print_c_condition (const char *cond) |
41723253 SB |
187 | { |
188 | fprint_c_condition (stdout, cond); | |
189 | } | |
190 | ||
bb933490 RS |
191 | /* A vfprintf-like function for reporting an error against line LINENO |
192 | of the current MD file. */ | |
193 | ||
194 | static void ATTRIBUTE_PRINTF(2,0) | |
cc472607 | 195 | message_at_1 (file_location loc, const char *msg, va_list ap) |
bb933490 | 196 | { |
3814e880 | 197 | fprintf (stderr, "%s:%d:%d: ", loc.filename, loc.lineno, loc.colno); |
bb933490 RS |
198 | vfprintf (stderr, msg, ap); |
199 | fputc ('\n', stderr); | |
200 | } | |
201 | ||
cc472607 RS |
202 | /* A printf-like function for reporting a message against location LOC. */ |
203 | ||
204 | void | |
205 | message_at (file_location loc, const char *msg, ...) | |
206 | { | |
207 | va_list ap; | |
208 | ||
209 | va_start (ap, msg); | |
210 | message_at_1 (loc, msg, ap); | |
211 | va_end (ap); | |
212 | } | |
213 | ||
214 | /* Like message_at, but treat the condition as an error. */ | |
215 | ||
216 | void | |
217 | error_at (file_location loc, const char *msg, ...) | |
218 | { | |
219 | va_list ap; | |
220 | ||
221 | va_start (ap, msg); | |
222 | message_at_1 (loc, msg, ap); | |
223 | va_end (ap); | |
224 | have_error = 1; | |
225 | } | |
226 | ||
8f246310 RS |
227 | /* Like message_at, but treat the condition as a fatal error. */ |
228 | ||
229 | void | |
230 | fatal_at (file_location loc, const char *msg, ...) | |
231 | { | |
232 | va_list ap; | |
233 | ||
234 | va_start (ap, msg); | |
235 | message_at_1 (loc, msg, ap); | |
236 | va_end (ap); | |
237 | exit (1); | |
238 | } | |
239 | ||
10692477 | 240 | /* A printf-like function for reporting an error against the current |
c5e88b39 | 241 | position in the MD file. */ |
10692477 RS |
242 | |
243 | void | |
c5e88b39 | 244 | fatal_with_file_and_line (const char *msg, ...) |
10692477 RS |
245 | { |
246 | char context[64]; | |
247 | size_t i; | |
248 | int c; | |
249 | va_list ap; | |
250 | ||
251 | va_start (ap, msg); | |
252 | ||
3814e880 DM |
253 | fprintf (stderr, "%s:%d:%d: error: ", rtx_reader_ptr->get_filename (), |
254 | rtx_reader_ptr->get_lineno (), rtx_reader_ptr->get_colno ()); | |
10692477 RS |
255 | vfprintf (stderr, msg, ap); |
256 | putc ('\n', stderr); | |
257 | ||
258 | /* Gather some following context. */ | |
259 | for (i = 0; i < sizeof (context)-1; ++i) | |
260 | { | |
c5e88b39 | 261 | c = read_char (); |
10692477 RS |
262 | if (c == EOF) |
263 | break; | |
264 | if (c == '\r' || c == '\n') | |
7f7c467f RS |
265 | { |
266 | unread_char (c); | |
267 | break; | |
268 | } | |
10692477 RS |
269 | context[i] = c; |
270 | } | |
271 | context[i] = '\0'; | |
272 | ||
3814e880 | 273 | fprintf (stderr, "%s:%d:%d: note: following context is `%s'\n", |
812b1403 | 274 | rtx_reader_ptr->get_filename (), rtx_reader_ptr->get_lineno (), |
3814e880 | 275 | rtx_reader_ptr->get_colno (), context); |
10692477 RS |
276 | |
277 | va_end (ap); | |
278 | exit (1); | |
279 | } | |
280 | ||
281 | /* Report that we found character ACTUAL when we expected to find | |
c5e88b39 | 282 | character EXPECTED. */ |
10692477 RS |
283 | |
284 | void | |
c5e88b39 | 285 | fatal_expected_char (int expected, int actual) |
10692477 RS |
286 | { |
287 | if (actual == EOF) | |
c5e88b39 | 288 | fatal_with_file_and_line ("expected character `%c', found EOF", |
10692477 RS |
289 | expected); |
290 | else | |
c5e88b39 | 291 | fatal_with_file_and_line ("expected character `%c', found `%c'", |
10692477 RS |
292 | expected, actual); |
293 | } | |
294 | ||
c5e88b39 | 295 | /* Read chars from the MD file until a non-whitespace char and return that. |
10692477 RS |
296 | Comments, both Lisp style and C style, are treated as whitespace. */ |
297 | ||
298 | int | |
c5e88b39 | 299 | read_skip_spaces (void) |
10692477 RS |
300 | { |
301 | int c; | |
302 | ||
303 | while (1) | |
304 | { | |
c5e88b39 | 305 | c = read_char (); |
10692477 RS |
306 | switch (c) |
307 | { | |
7f7c467f | 308 | case ' ': case '\t': case '\f': case '\r': case '\n': |
10692477 RS |
309 | break; |
310 | ||
311 | case ';': | |
312 | do | |
c5e88b39 | 313 | c = read_char (); |
10692477 | 314 | while (c != '\n' && c != EOF); |
10692477 RS |
315 | break; |
316 | ||
317 | case '/': | |
318 | { | |
319 | int prevc; | |
c5e88b39 | 320 | c = read_char (); |
10692477 | 321 | if (c != '*') |
7f7c467f RS |
322 | { |
323 | unread_char (c); | |
324 | fatal_with_file_and_line ("stray '/' in file"); | |
325 | } | |
10692477 RS |
326 | |
327 | prevc = 0; | |
c5e88b39 | 328 | while ((c = read_char ()) && c != EOF) |
10692477 | 329 | { |
7f7c467f | 330 | if (prevc == '*' && c == '/') |
10692477 RS |
331 | break; |
332 | prevc = c; | |
333 | } | |
334 | } | |
335 | break; | |
336 | ||
337 | default: | |
338 | return c; | |
339 | } | |
340 | } | |
341 | } | |
342 | ||
9c4e96eb DM |
343 | /* Consume the next character, issuing a fatal error if it is not |
344 | EXPECTED. */ | |
345 | ||
346 | void | |
347 | rtx_reader::require_char (char expected) | |
348 | { | |
349 | int ch = read_char (); | |
350 | if (ch != expected) | |
351 | fatal_expected_char (expected, ch); | |
352 | } | |
353 | ||
601070fc DM |
354 | /* Consume any whitespace, then consume the next non-whitespace |
355 | character, issuing a fatal error if it is not EXPECTED. */ | |
356 | ||
357 | void | |
9c4e96eb | 358 | rtx_reader::require_char_ws (char expected) |
601070fc DM |
359 | { |
360 | int ch = read_skip_spaces (); | |
361 | if (ch != expected) | |
362 | fatal_expected_char (expected, ch); | |
363 | } | |
364 | ||
9c4e96eb DM |
365 | /* Consume any whitespace, then consume the next word (as per read_name), |
366 | issuing a fatal error if it is not EXPECTED. */ | |
367 | ||
368 | void | |
369 | rtx_reader::require_word_ws (const char *expected) | |
370 | { | |
371 | struct md_name name; | |
372 | read_name (&name); | |
373 | if (strcmp (name.string, expected)) | |
374 | fatal_with_file_and_line ("missing '%s'", expected); | |
375 | } | |
376 | ||
812b1403 DM |
377 | /* Read the next character from the file. */ |
378 | ||
379 | int | |
380 | rtx_reader::read_char (void) | |
381 | { | |
382 | int ch; | |
383 | ||
384 | ch = getc (m_read_md_file); | |
385 | if (ch == '\n') | |
3814e880 DM |
386 | { |
387 | m_read_md_lineno++; | |
388 | m_last_line_colno = m_read_md_colno; | |
389 | m_read_md_colno = 0; | |
390 | } | |
391 | else | |
392 | m_read_md_colno++; | |
812b1403 DM |
393 | |
394 | return ch; | |
395 | } | |
396 | ||
397 | /* Put back CH, which was the last character read from the file. */ | |
398 | ||
399 | void | |
400 | rtx_reader::unread_char (int ch) | |
401 | { | |
402 | if (ch == '\n') | |
3814e880 DM |
403 | { |
404 | m_read_md_lineno--; | |
405 | m_read_md_colno = m_last_line_colno; | |
406 | } | |
407 | else | |
408 | m_read_md_colno--; | |
812b1403 DM |
409 | ungetc (ch, m_read_md_file); |
410 | } | |
411 | ||
9c4e96eb DM |
412 | /* Peek at the next character from the file without consuming it. */ |
413 | ||
414 | int | |
415 | rtx_reader::peek_char (void) | |
416 | { | |
417 | int ch = read_char (); | |
418 | unread_char (ch); | |
419 | return ch; | |
420 | } | |
421 | ||
9f418533 RS |
422 | /* Read an rtx code name into NAME. It is terminated by any of the |
423 | punctuation chars of rtx printed syntax. */ | |
424 | ||
425 | void | |
b78027d1 | 426 | rtx_reader::read_name (struct md_name *name) |
9f418533 RS |
427 | { |
428 | int c; | |
429 | size_t i; | |
4fe017f6 | 430 | int angle_bracket_depth; |
9f418533 RS |
431 | |
432 | c = read_skip_spaces (); | |
433 | ||
434 | i = 0; | |
4fe017f6 | 435 | angle_bracket_depth = 0; |
9f418533 RS |
436 | while (1) |
437 | { | |
4fe017f6 MC |
438 | if (c == '<') |
439 | angle_bracket_depth++; | |
440 | ||
441 | if ((c == '>') && (angle_bracket_depth > 0)) | |
442 | angle_bracket_depth--; | |
443 | ||
9f418533 RS |
444 | if (c == ' ' || c == '\n' || c == '\t' || c == '\f' || c == '\r' |
445 | || c == EOF) | |
446 | break; | |
4fe017f6 | 447 | if (angle_bracket_depth == 0) |
9f418533 | 448 | { |
4fe017f6 MC |
449 | if (c == ':' || c == ')' || c == ']' |
450 | || c == '"' || c == '/' || c == '(' || c == '[') | |
451 | { | |
452 | unread_char (c); | |
453 | break; | |
454 | } | |
9f418533 RS |
455 | } |
456 | ||
457 | if (i == sizeof (name->buffer) - 1) | |
458 | fatal_with_file_and_line ("name too long"); | |
459 | name->buffer[i++] = c; | |
460 | ||
461 | c = read_char (); | |
462 | } | |
463 | ||
464 | if (i == 0) | |
465 | fatal_with_file_and_line ("missing name or number"); | |
9f418533 RS |
466 | |
467 | name->buffer[i] = 0; | |
468 | name->string = name->buffer; | |
469 | ||
b78027d1 | 470 | if (m_md_constants) |
9f418533 RS |
471 | { |
472 | /* Do constant expansion. */ | |
473 | struct md_constant *def; | |
474 | ||
475 | do | |
476 | { | |
477 | struct md_constant tmp_def; | |
478 | ||
479 | tmp_def.name = name->string; | |
b78027d1 | 480 | def = (struct md_constant *) htab_find (m_md_constants, &tmp_def); |
9f418533 RS |
481 | if (def) |
482 | name->string = def->value; | |
483 | } | |
484 | while (def); | |
485 | } | |
486 | } | |
487 | ||
10692477 RS |
488 | /* Subroutine of the string readers. Handles backslash escapes. |
489 | Caller has read the backslash, but not placed it into the obstack. */ | |
490 | ||
b78027d1 DM |
491 | void |
492 | rtx_reader::read_escape () | |
10692477 | 493 | { |
c5e88b39 | 494 | int c = read_char (); |
10692477 RS |
495 | |
496 | switch (c) | |
497 | { | |
498 | /* Backslash-newline is replaced by nothing, as in C. */ | |
499 | case '\n': | |
10692477 RS |
500 | return; |
501 | ||
502 | /* \" \' \\ are replaced by the second character. */ | |
503 | case '\\': | |
504 | case '"': | |
505 | case '\'': | |
506 | break; | |
507 | ||
508 | /* Standard C string escapes: | |
509 | \a \b \f \n \r \t \v | |
510 | \[0-7] \x | |
511 | all are passed through to the output string unmolested. | |
512 | In normal use these wind up in a string constant processed | |
513 | by the C compiler, which will translate them appropriately. | |
514 | We do not bother checking that \[0-7] are followed by up to | |
515 | two octal digits, or that \x is followed by N hex digits. | |
516 | \? \u \U are left out because they are not in traditional C. */ | |
517 | case 'a': case 'b': case 'f': case 'n': case 'r': case 't': case 'v': | |
518 | case '0': case '1': case '2': case '3': case '4': case '5': case '6': | |
519 | case '7': case 'x': | |
b78027d1 | 520 | obstack_1grow (&m_string_obstack, '\\'); |
10692477 RS |
521 | break; |
522 | ||
523 | /* \; makes stuff for a C string constant containing | |
524 | newline and tab. */ | |
525 | case ';': | |
b78027d1 | 526 | obstack_grow (&m_string_obstack, "\\n\\t", 4); |
10692477 RS |
527 | return; |
528 | ||
529 | /* pass anything else through, but issue a warning. */ | |
530 | default: | |
531 | fprintf (stderr, "%s:%d: warning: unrecognized escape \\%c\n", | |
b78027d1 | 532 | get_filename (), get_lineno (), |
812b1403 | 533 | c); |
b78027d1 | 534 | obstack_1grow (&m_string_obstack, '\\'); |
10692477 RS |
535 | break; |
536 | } | |
537 | ||
b78027d1 | 538 | obstack_1grow (&m_string_obstack, c); |
10692477 RS |
539 | } |
540 | ||
541 | /* Read a double-quoted string onto the obstack. Caller has scanned | |
542 | the leading quote. */ | |
543 | ||
544 | char * | |
b78027d1 | 545 | rtx_reader::read_quoted_string () |
10692477 RS |
546 | { |
547 | int c; | |
548 | ||
549 | while (1) | |
550 | { | |
c5e88b39 | 551 | c = read_char (); /* Read the string */ |
7f7c467f | 552 | if (c == '\\') |
10692477 | 553 | { |
c5e88b39 | 554 | read_escape (); |
10692477 RS |
555 | continue; |
556 | } | |
557 | else if (c == '"' || c == EOF) | |
558 | break; | |
559 | ||
b78027d1 | 560 | obstack_1grow (&m_string_obstack, c); |
10692477 RS |
561 | } |
562 | ||
b78027d1 DM |
563 | obstack_1grow (&m_string_obstack, 0); |
564 | return XOBFINISH (&m_string_obstack, char *); | |
10692477 RS |
565 | } |
566 | ||
567 | /* Read a braced string (a la Tcl) onto the string obstack. Caller | |
568 | has scanned the leading brace. Note that unlike quoted strings, | |
569 | the outermost braces _are_ included in the string constant. */ | |
570 | ||
b78027d1 DM |
571 | char * |
572 | rtx_reader::read_braced_string () | |
10692477 RS |
573 | { |
574 | int c; | |
575 | int brace_depth = 1; /* caller-processed */ | |
b78027d1 | 576 | unsigned long starting_read_md_lineno = get_lineno (); |
10692477 | 577 | |
b78027d1 | 578 | obstack_1grow (&m_string_obstack, '{'); |
10692477 RS |
579 | while (brace_depth) |
580 | { | |
c5e88b39 | 581 | c = read_char (); /* Read the string */ |
10692477 | 582 | |
7f7c467f | 583 | if (c == '{') |
10692477 RS |
584 | brace_depth++; |
585 | else if (c == '}') | |
586 | brace_depth--; | |
587 | else if (c == '\\') | |
588 | { | |
c5e88b39 | 589 | read_escape (); |
10692477 RS |
590 | continue; |
591 | } | |
592 | else if (c == EOF) | |
593 | fatal_with_file_and_line | |
c5e88b39 | 594 | ("missing closing } for opening brace on line %lu", |
d2a3ce4e | 595 | starting_read_md_lineno); |
10692477 | 596 | |
b78027d1 | 597 | obstack_1grow (&m_string_obstack, c); |
10692477 RS |
598 | } |
599 | ||
b78027d1 DM |
600 | obstack_1grow (&m_string_obstack, 0); |
601 | return XOBFINISH (&m_string_obstack, char *); | |
10692477 RS |
602 | } |
603 | ||
604 | /* Read some kind of string constant. This is the high-level routine | |
605 | used by read_rtx. It handles surrounding parentheses, leading star, | |
606 | and dispatch to the appropriate string constant reader. */ | |
607 | ||
608 | char * | |
b78027d1 | 609 | rtx_reader::read_string (int star_if_braced) |
10692477 RS |
610 | { |
611 | char *stringbuf; | |
612 | int saw_paren = 0; | |
613 | int c, old_lineno; | |
614 | ||
c5e88b39 | 615 | c = read_skip_spaces (); |
10692477 RS |
616 | if (c == '(') |
617 | { | |
618 | saw_paren = 1; | |
c5e88b39 | 619 | c = read_skip_spaces (); |
10692477 RS |
620 | } |
621 | ||
b78027d1 | 622 | old_lineno = get_lineno (); |
10692477 | 623 | if (c == '"') |
c5e88b39 | 624 | stringbuf = read_quoted_string (); |
10692477 RS |
625 | else if (c == '{') |
626 | { | |
627 | if (star_if_braced) | |
b78027d1 | 628 | obstack_1grow (&m_string_obstack, '*'); |
c5e88b39 | 629 | stringbuf = read_braced_string (); |
10692477 RS |
630 | } |
631 | else | |
c5e88b39 | 632 | fatal_with_file_and_line ("expected `\"' or `{', found `%c'", c); |
10692477 RS |
633 | |
634 | if (saw_paren) | |
601070fc | 635 | require_char_ws (')'); |
10692477 | 636 | |
b78027d1 | 637 | set_md_ptr_loc (stringbuf, get_filename (), old_lineno); |
10692477 RS |
638 | return stringbuf; |
639 | } | |
640 | ||
9b68b6ea RS |
641 | /* Skip the rest of a construct that started at line LINENO and that |
642 | is currently nested by DEPTH levels of parentheses. */ | |
643 | ||
b78027d1 DM |
644 | void |
645 | rtx_reader::read_skip_construct (int depth, file_location loc) | |
9b68b6ea RS |
646 | { |
647 | struct md_name name; | |
648 | int c; | |
649 | ||
650 | do | |
651 | { | |
652 | c = read_skip_spaces (); | |
653 | if (c == EOF) | |
654 | { | |
cc472607 | 655 | error_at (loc, "unterminated construct"); |
9b68b6ea RS |
656 | exit (1); |
657 | } | |
658 | switch (c) | |
659 | { | |
660 | case '(': | |
661 | depth++; | |
662 | break; | |
663 | ||
664 | case ')': | |
665 | depth--; | |
666 | break; | |
667 | ||
668 | case ':': | |
669 | case '[': | |
670 | case ']': | |
671 | case '/': | |
672 | break; | |
673 | ||
674 | case '\"': | |
675 | case '{': | |
676 | unread_char (c); | |
677 | read_string (false); | |
678 | break; | |
679 | ||
680 | default: | |
681 | unread_char (c); | |
682 | read_name (&name); | |
683 | break; | |
684 | } | |
685 | } | |
686 | while (depth > 0); | |
687 | unread_char (c); | |
688 | } | |
689 | ||
10692477 RS |
690 | /* Given a string, return the number of comma-separated elements in it. |
691 | Return 0 for the null string. */ | |
692 | ||
693 | int | |
694 | n_comma_elts (const char *s) | |
695 | { | |
696 | int n; | |
697 | ||
698 | if (*s == '\0') | |
699 | return 0; | |
700 | ||
701 | for (n = 1; *s; s++) | |
702 | if (*s == ',') | |
703 | n++; | |
704 | ||
705 | return n; | |
706 | } | |
707 | ||
708 | /* Given a pointer to a (char *), return a pointer to the beginning of the | |
709 | next comma-separated element in the string. Advance the pointer given | |
710 | to the end of that element. Return NULL if at end of string. Caller | |
711 | is responsible for copying the string if necessary. White space between | |
712 | a comma and an element is ignored. */ | |
713 | ||
714 | const char * | |
715 | scan_comma_elt (const char **pstr) | |
716 | { | |
717 | const char *start; | |
718 | const char *p = *pstr; | |
719 | ||
720 | if (*p == ',') | |
721 | p++; | |
c3284718 | 722 | while (ISSPACE (*p)) |
10692477 RS |
723 | p++; |
724 | ||
725 | if (*p == '\0') | |
726 | return NULL; | |
727 | ||
728 | start = p; | |
729 | ||
730 | while (*p != ',' && *p != '\0') | |
731 | p++; | |
732 | ||
733 | *pstr = p; | |
734 | return start; | |
735 | } | |
736 | ||
24609606 RS |
737 | /* Convert STRING to uppercase. */ |
738 | ||
739 | void | |
740 | upcase_string (char *string) | |
741 | { | |
742 | int i; | |
743 | ||
744 | for (i = 0; string[i]; i++) | |
745 | string[i] = TOUPPER (string[i]); | |
746 | } | |
747 | ||
748 | /* Add a NAME = VALUE definition to md_constants-style hash table DEFS, | |
749 | where both NAME and VALUE are malloc()ed strings. PARENT_ENUM is the | |
750 | enum to which NAME belongs, or null if NAME is a stand-alone constant. */ | |
751 | ||
752 | static struct md_constant * | |
753 | add_constant (htab_t defs, char *name, char *value, | |
754 | struct enum_type *parent_enum) | |
755 | { | |
756 | struct md_constant *def, tmp_def; | |
757 | void **entry_ptr; | |
758 | ||
759 | tmp_def.name = name; | |
760 | entry_ptr = htab_find_slot (defs, &tmp_def, INSERT); | |
761 | if (*entry_ptr) | |
762 | { | |
763 | def = (struct md_constant *) *entry_ptr; | |
764 | if (strcmp (def->value, value) != 0) | |
765 | fatal_with_file_and_line ("redefinition of `%s', was `%s', now `%s'", | |
766 | def->name, def->value, value); | |
767 | else if (parent_enum || def->parent_enum) | |
768 | fatal_with_file_and_line ("redefinition of `%s'", def->name); | |
769 | free (name); | |
770 | free (value); | |
771 | } | |
772 | else | |
773 | { | |
774 | def = XNEW (struct md_constant); | |
775 | def->name = name; | |
776 | def->value = value; | |
777 | def->parent_enum = parent_enum; | |
778 | *entry_ptr = def; | |
779 | } | |
780 | return def; | |
781 | } | |
782 | ||
9f418533 RS |
783 | /* Process a define_constants directive, starting with the optional space |
784 | after the "define_constants". */ | |
785 | ||
b78027d1 DM |
786 | void |
787 | rtx_reader::handle_constants () | |
9f418533 RS |
788 | { |
789 | int c; | |
790 | htab_t defs; | |
791 | ||
601070fc | 792 | require_char_ws ('['); |
9f418533 RS |
793 | |
794 | /* Disable constant expansion during definition processing. */ | |
b78027d1 DM |
795 | defs = m_md_constants; |
796 | m_md_constants = 0; | |
9f418533 RS |
797 | while ( (c = read_skip_spaces ()) != ']') |
798 | { | |
799 | struct md_name name, value; | |
9f418533 RS |
800 | |
801 | if (c != '(') | |
802 | fatal_expected_char ('(', c); | |
803 | ||
804 | read_name (&name); | |
805 | read_name (&value); | |
24609606 | 806 | add_constant (defs, xstrdup (name.string), xstrdup (value.string), 0); |
9f418533 | 807 | |
601070fc | 808 | require_char_ws (')'); |
9f418533 | 809 | } |
b78027d1 | 810 | m_md_constants = defs; |
9f418533 RS |
811 | } |
812 | ||
813 | /* For every constant definition, call CALLBACK with two arguments: | |
814 | a pointer a pointer to the constant definition and INFO. | |
815 | Stop when CALLBACK returns zero. */ | |
816 | ||
817 | void | |
b78027d1 | 818 | rtx_reader::traverse_md_constants (htab_trav callback, void *info) |
9f418533 | 819 | { |
b78027d1 | 820 | htab_traverse (get_md_constants (), callback, info); |
24609606 RS |
821 | } |
822 | ||
823 | /* Return a malloc()ed decimal string that represents number NUMBER. */ | |
824 | ||
825 | static char * | |
09e9c1e0 | 826 | md_decimal_string (int number) |
24609606 RS |
827 | { |
828 | /* A safe overestimate. +1 for sign, +1 for null terminator. */ | |
829 | char buffer[sizeof (int) * CHAR_BIT + 1 + 1]; | |
830 | ||
831 | sprintf (buffer, "%d", number); | |
832 | return xstrdup (buffer); | |
833 | } | |
834 | ||
835 | /* Process a define_enum or define_c_enum directive, starting with | |
836 | the optional space after the "define_enum". LINENO is the line | |
837 | number on which the directive started and MD_P is true if the | |
838 | directive is a define_enum rather than a define_c_enum. */ | |
839 | ||
b78027d1 DM |
840 | void |
841 | rtx_reader::handle_enum (file_location loc, bool md_p) | |
24609606 RS |
842 | { |
843 | char *enum_name, *value_name; | |
844 | struct md_name name; | |
845 | struct enum_type *def; | |
846 | struct enum_value *ev; | |
847 | void **slot; | |
848 | int c; | |
849 | ||
850 | enum_name = read_string (false); | |
b78027d1 | 851 | slot = htab_find_slot (m_enum_types, &enum_name, INSERT); |
24609606 RS |
852 | if (*slot) |
853 | { | |
854 | def = (struct enum_type *) *slot; | |
855 | if (def->md_p != md_p) | |
cc472607 RS |
856 | error_at (loc, "redefining `%s' as a different type of enum", |
857 | enum_name); | |
24609606 RS |
858 | } |
859 | else | |
860 | { | |
861 | def = XNEW (struct enum_type); | |
862 | def->name = enum_name; | |
863 | def->md_p = md_p; | |
864 | def->values = 0; | |
865 | def->tail_ptr = &def->values; | |
866 | def->num_values = 0; | |
867 | *slot = def; | |
868 | } | |
869 | ||
601070fc | 870 | require_char_ws ('['); |
24609606 RS |
871 | |
872 | while ((c = read_skip_spaces ()) != ']') | |
873 | { | |
874 | if (c == EOF) | |
875 | { | |
cc472607 | 876 | error_at (loc, "unterminated construct"); |
24609606 RS |
877 | exit (1); |
878 | } | |
879 | unread_char (c); | |
880 | read_name (&name); | |
881 | ||
882 | ev = XNEW (struct enum_value); | |
883 | ev->next = 0; | |
884 | if (md_p) | |
885 | { | |
886 | value_name = concat (def->name, "_", name.string, NULL); | |
887 | upcase_string (value_name); | |
888 | ev->name = xstrdup (name.string); | |
889 | } | |
890 | else | |
891 | { | |
892 | value_name = xstrdup (name.string); | |
893 | ev->name = value_name; | |
894 | } | |
b78027d1 | 895 | ev->def = add_constant (get_md_constants (), value_name, |
09e9c1e0 | 896 | md_decimal_string (def->num_values), def); |
24609606 RS |
897 | |
898 | *def->tail_ptr = ev; | |
899 | def->tail_ptr = &ev->next; | |
900 | def->num_values++; | |
901 | } | |
902 | } | |
903 | ||
8f4fe86c RS |
904 | /* Try to find the definition of the given enum. Return null on failure. */ |
905 | ||
906 | struct enum_type * | |
b78027d1 | 907 | rtx_reader::lookup_enum_type (const char *name) |
8f4fe86c | 908 | { |
b78027d1 | 909 | return (struct enum_type *) htab_find (m_enum_types, &name); |
8f4fe86c RS |
910 | } |
911 | ||
24609606 RS |
912 | /* For every enum definition, call CALLBACK with two arguments: |
913 | a pointer to the constant definition and INFO. Stop when CALLBACK | |
914 | returns zero. */ | |
915 | ||
916 | void | |
b78027d1 | 917 | rtx_reader::traverse_enum_types (htab_trav callback, void *info) |
24609606 | 918 | { |
b78027d1 | 919 | htab_traverse (m_enum_types, callback, info); |
9f418533 RS |
920 | } |
921 | ||
812b1403 DM |
922 | |
923 | /* Constructor for rtx_reader. */ | |
924 | ||
925 | rtx_reader::rtx_reader () | |
926 | : m_toplevel_fname (NULL), | |
927 | m_base_dir (NULL), | |
928 | m_read_md_file (NULL), | |
929 | m_read_md_filename (NULL), | |
930 | m_read_md_lineno (0), | |
3814e880 | 931 | m_read_md_colno (0), |
812b1403 DM |
932 | m_first_dir_md_include (NULL), |
933 | m_last_dir_md_include_ptr (&m_first_dir_md_include) | |
934 | { | |
935 | /* Set the global singleton pointer. */ | |
936 | rtx_reader_ptr = this; | |
b78027d1 DM |
937 | |
938 | obstack_init (&m_string_obstack); | |
939 | ||
940 | m_ptr_locs = htab_create (161, leading_ptr_hash, leading_ptr_eq_p, 0); | |
941 | obstack_init (&m_ptr_loc_obstack); | |
942 | ||
943 | m_joined_conditions = htab_create (161, leading_ptr_hash, leading_ptr_eq_p, 0); | |
944 | obstack_init (&m_joined_conditions_obstack); | |
945 | ||
946 | m_md_constants = htab_create (31, leading_string_hash, | |
947 | leading_string_eq_p, (htab_del) 0); | |
948 | ||
949 | m_enum_types = htab_create (31, leading_string_hash, | |
950 | leading_string_eq_p, (htab_del) 0); | |
951 | ||
952 | /* Unlock the stdio streams. */ | |
953 | unlock_std_streams (); | |
812b1403 DM |
954 | } |
955 | ||
956 | /* rtx_reader's destructor. */ | |
957 | ||
958 | rtx_reader::~rtx_reader () | |
959 | { | |
b78027d1 DM |
960 | free (m_base_dir); |
961 | ||
962 | htab_delete (m_enum_types); | |
963 | ||
964 | htab_delete (m_md_constants); | |
965 | ||
966 | obstack_free (&m_joined_conditions_obstack, NULL); | |
967 | htab_delete (m_joined_conditions); | |
968 | ||
969 | obstack_free (&m_ptr_loc_obstack, NULL); | |
970 | htab_delete (m_ptr_locs); | |
971 | ||
972 | obstack_free (&m_string_obstack, NULL); | |
973 | ||
812b1403 DM |
974 | /* Clear the global singleton pointer. */ |
975 | rtx_reader_ptr = NULL; | |
976 | } | |
977 | ||
600ab3fc RS |
978 | /* Process an "include" directive, starting with the optional space |
979 | after the "include". Read in the file and use HANDLE_DIRECTIVE | |
980 | to process each unknown directive. LINENO is the line number on | |
1aa95df7 | 981 | which the "include" occurred. */ |
10692477 | 982 | |
812b1403 DM |
983 | void |
984 | rtx_reader::handle_include (file_location loc) | |
10692477 | 985 | { |
600ab3fc RS |
986 | const char *filename; |
987 | const char *old_filename; | |
3814e880 | 988 | int old_lineno, old_colno; |
600ab3fc RS |
989 | char *pathname; |
990 | FILE *input_file, *old_file; | |
991 | ||
992 | filename = read_string (false); | |
993 | input_file = NULL; | |
994 | ||
995 | /* If the specified file name is absolute, skip the include stack. */ | |
996 | if (!IS_ABSOLUTE_PATH (filename)) | |
997 | { | |
998 | struct file_name_list *stackp; | |
999 | ||
1000 | /* Search the directory path, trying to open the file. */ | |
812b1403 | 1001 | for (stackp = m_first_dir_md_include; stackp; stackp = stackp->next) |
600ab3fc RS |
1002 | { |
1003 | static const char sep[2] = { DIR_SEPARATOR, '\0' }; | |
1004 | ||
1005 | pathname = concat (stackp->fname, sep, filename, NULL); | |
1006 | input_file = fopen (pathname, "r"); | |
1007 | if (input_file != NULL) | |
1008 | break; | |
1009 | free (pathname); | |
1010 | } | |
1011 | } | |
1012 | ||
1013 | /* If we haven't managed to open the file yet, try combining the | |
1014 | filename with BASE_DIR. */ | |
1015 | if (input_file == NULL) | |
1016 | { | |
812b1403 DM |
1017 | if (m_base_dir) |
1018 | pathname = concat (m_base_dir, filename, NULL); | |
600ab3fc RS |
1019 | else |
1020 | pathname = xstrdup (filename); | |
1021 | input_file = fopen (pathname, "r"); | |
1022 | } | |
1023 | ||
1024 | if (input_file == NULL) | |
1025 | { | |
1026 | free (pathname); | |
cc472607 | 1027 | error_at (loc, "include file `%s' not found", filename); |
600ab3fc RS |
1028 | return; |
1029 | } | |
1030 | ||
1031 | /* Save the old cursor. Note that the LINENO argument to this | |
1032 | function is the beginning of the include statement, while | |
1033 | read_md_lineno has already been advanced. */ | |
812b1403 DM |
1034 | old_file = m_read_md_file; |
1035 | old_filename = m_read_md_filename; | |
1036 | old_lineno = m_read_md_lineno; | |
3814e880 | 1037 | old_colno = m_read_md_colno; |
600ab3fc RS |
1038 | |
1039 | if (include_callback) | |
1040 | include_callback (pathname); | |
1041 | ||
812b1403 DM |
1042 | m_read_md_file = input_file; |
1043 | m_read_md_filename = pathname; | |
1044 | ||
1045 | handle_file (); | |
600ab3fc RS |
1046 | |
1047 | /* Restore the old cursor. */ | |
812b1403 DM |
1048 | m_read_md_file = old_file; |
1049 | m_read_md_filename = old_filename; | |
1050 | m_read_md_lineno = old_lineno; | |
3814e880 | 1051 | m_read_md_colno = old_colno; |
600ab3fc RS |
1052 | |
1053 | /* Do not free the pathname. It is attached to the various rtx | |
1054 | queue elements. */ | |
1055 | } | |
1056 | ||
1057 | /* Process the current file, assuming that read_md_file and | |
1058 | read_md_filename are valid. Use HANDLE_DIRECTIVE to handle | |
1059 | unknown directives. */ | |
1060 | ||
812b1403 DM |
1061 | void |
1062 | rtx_reader::handle_file () | |
600ab3fc RS |
1063 | { |
1064 | struct md_name directive; | |
cc472607 | 1065 | int c; |
600ab3fc | 1066 | |
812b1403 | 1067 | m_read_md_lineno = 1; |
3814e880 | 1068 | m_read_md_colno = 0; |
600ab3fc RS |
1069 | while ((c = read_skip_spaces ()) != EOF) |
1070 | { | |
812b1403 | 1071 | file_location loc = get_current_location (); |
600ab3fc RS |
1072 | if (c != '(') |
1073 | fatal_expected_char ('(', c); | |
1074 | ||
1075 | read_name (&directive); | |
1076 | if (strcmp (directive.string, "define_constants") == 0) | |
1077 | handle_constants (); | |
24609606 | 1078 | else if (strcmp (directive.string, "define_enum") == 0) |
cc472607 | 1079 | handle_enum (loc, true); |
24609606 | 1080 | else if (strcmp (directive.string, "define_c_enum") == 0) |
cc472607 | 1081 | handle_enum (loc, false); |
600ab3fc | 1082 | else if (strcmp (directive.string, "include") == 0) |
812b1403 | 1083 | handle_include (loc); |
9b68b6ea | 1084 | else |
812b1403 | 1085 | handle_unknown_directive (loc, directive.string); |
600ab3fc | 1086 | |
601070fc | 1087 | require_char_ws (')'); |
600ab3fc | 1088 | } |
812b1403 | 1089 | fclose (m_read_md_file); |
600ab3fc RS |
1090 | } |
1091 | ||
812b1403 DM |
1092 | /* Like handle_file, but for top-level files. Set up m_toplevel_fname |
1093 | and m_base_dir accordingly. */ | |
600ab3fc | 1094 | |
812b1403 DM |
1095 | void |
1096 | rtx_reader::handle_toplevel_file () | |
600ab3fc | 1097 | { |
ba78087b | 1098 | const char *base; |
600ab3fc | 1099 | |
812b1403 DM |
1100 | m_toplevel_fname = m_read_md_filename; |
1101 | base = lbasename (m_toplevel_fname); | |
1102 | if (base == m_toplevel_fname) | |
1103 | m_base_dir = NULL; | |
ba78087b | 1104 | else |
812b1403 DM |
1105 | m_base_dir = xstrndup (m_toplevel_fname, base - m_toplevel_fname); |
1106 | ||
1107 | handle_file (); | |
1108 | } | |
600ab3fc | 1109 | |
812b1403 DM |
1110 | file_location |
1111 | rtx_reader::get_current_location () const | |
1112 | { | |
3814e880 | 1113 | return file_location (m_read_md_filename, m_read_md_lineno, m_read_md_colno); |
600ab3fc RS |
1114 | } |
1115 | ||
1116 | /* Parse a -I option with argument ARG. */ | |
1117 | ||
812b1403 DM |
1118 | void |
1119 | rtx_reader::add_include_path (const char *arg) | |
600ab3fc RS |
1120 | { |
1121 | struct file_name_list *dirtmp; | |
1122 | ||
1123 | dirtmp = XNEW (struct file_name_list); | |
1124 | dirtmp->next = 0; | |
1125 | dirtmp->fname = arg; | |
812b1403 DM |
1126 | *m_last_dir_md_include_ptr = dirtmp; |
1127 | m_last_dir_md_include_ptr = &dirtmp->next; | |
600ab3fc RS |
1128 | } |
1129 | ||
1130 | /* The main routine for reading .md files. Try to process all the .md | |
1aa95df7 | 1131 | files specified on the command line and return true if no error occurred. |
600ab3fc RS |
1132 | |
1133 | ARGC and ARGV are the arguments to main. | |
1134 | ||
1135 | PARSE_OPT, if nonnull, is passed all unknown command-line arguments. | |
1136 | It should return true if it recognizes the argument or false if a | |
812b1403 | 1137 | generic error should be reported. */ |
600ab3fc RS |
1138 | |
1139 | bool | |
812b1403 DM |
1140 | rtx_reader::read_md_files (int argc, const char **argv, |
1141 | bool (*parse_opt) (const char *)) | |
600ab3fc RS |
1142 | { |
1143 | int i; | |
1144 | bool no_more_options; | |
1145 | bool already_read_stdin; | |
1146 | int num_files; | |
1147 | ||
600ab3fc RS |
1148 | /* First we loop over all the options. */ |
1149 | for (i = 1; i < argc; i++) | |
1150 | if (argv[i][0] == '-') | |
1151 | { | |
1152 | /* An argument consisting of exactly one dash is a request to | |
1153 | read stdin. This will be handled in the second loop. */ | |
1154 | if (argv[i][1] == '\0') | |
1155 | continue; | |
1156 | ||
1157 | /* An argument consisting of just two dashes causes option | |
1158 | parsing to cease. */ | |
1159 | if (argv[i][1] == '-' && argv[i][2] == '\0') | |
1160 | break; | |
1161 | ||
1162 | if (argv[i][1] == 'I') | |
1163 | { | |
1164 | if (argv[i][2] != '\0') | |
812b1403 | 1165 | add_include_path (argv[i] + 2); |
600ab3fc | 1166 | else if (++i < argc) |
812b1403 | 1167 | add_include_path (argv[i]); |
600ab3fc RS |
1168 | else |
1169 | fatal ("directory name missing after -I option"); | |
1170 | continue; | |
1171 | } | |
1172 | ||
1173 | /* The program may have provided a callback so it can | |
1174 | accept its own options. */ | |
1175 | if (parse_opt && parse_opt (argv[i])) | |
1176 | continue; | |
1177 | ||
1178 | fatal ("invalid option `%s'", argv[i]); | |
1179 | } | |
1180 | ||
1181 | /* Now loop over all input files. */ | |
1182 | num_files = 0; | |
1183 | no_more_options = false; | |
1184 | already_read_stdin = false; | |
1185 | for (i = 1; i < argc; i++) | |
1186 | { | |
1187 | if (argv[i][0] == '-') | |
1188 | { | |
1189 | if (argv[i][1] == '\0') | |
1190 | { | |
1191 | /* Read stdin. */ | |
1192 | if (already_read_stdin) | |
1193 | fatal ("cannot read standard input twice"); | |
1194 | ||
812b1403 DM |
1195 | m_read_md_file = stdin; |
1196 | m_read_md_filename = "<stdin>"; | |
1197 | handle_toplevel_file (); | |
600ab3fc RS |
1198 | already_read_stdin = true; |
1199 | continue; | |
1200 | } | |
1201 | else if (argv[i][1] == '-' && argv[i][2] == '\0') | |
1202 | { | |
1203 | /* No further arguments are to be treated as options. */ | |
1204 | no_more_options = true; | |
1205 | continue; | |
1206 | } | |
1207 | else if (!no_more_options) | |
1208 | continue; | |
1209 | } | |
1210 | ||
1211 | /* If we get here we are looking at a non-option argument, i.e. | |
1212 | a file to be processed. */ | |
812b1403 DM |
1213 | m_read_md_filename = argv[i]; |
1214 | m_read_md_file = fopen (m_read_md_filename, "r"); | |
1215 | if (m_read_md_file == 0) | |
600ab3fc | 1216 | { |
812b1403 | 1217 | perror (m_read_md_filename); |
600ab3fc RS |
1218 | return false; |
1219 | } | |
812b1403 | 1220 | handle_toplevel_file (); |
600ab3fc RS |
1221 | num_files++; |
1222 | } | |
1223 | ||
1224 | /* If we get to this point without having seen any files to process, | |
1225 | read the standard input now. */ | |
1226 | if (num_files == 0 && !already_read_stdin) | |
1227 | { | |
812b1403 DM |
1228 | m_read_md_file = stdin; |
1229 | m_read_md_filename = "<stdin>"; | |
1230 | handle_toplevel_file (); | |
600ab3fc RS |
1231 | } |
1232 | ||
1233 | return !have_error; | |
10692477 | 1234 | } |
812b1403 DM |
1235 | |
1236 | /* class noop_reader : public rtx_reader */ | |
1237 | ||
1238 | /* A dummy implementation which skips unknown directives. */ | |
1239 | void | |
1240 | noop_reader::handle_unknown_directive (file_location loc, const char *) | |
1241 | { | |
1242 | read_skip_construct (1, loc); | |
1243 | } |