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252b5132 | 1 | /* macro.c - macro support for gas and gasp |
1af6dcd2 | 2 | Copyright (C) 1994, 95, 96, 97, 98, 1999 Free Software Foundation, Inc. |
252b5132 RH |
3 | |
4 | Written by Steve and Judy Chamberlain of Cygnus Support, | |
5 | sac@cygnus.com | |
6 | ||
7 | This file is part of GAS, the GNU Assembler. | |
8 | ||
9 | GAS is free software; you can redistribute it and/or modify | |
10 | it under the terms of the GNU General Public License as published by | |
11 | the Free Software Foundation; either version 2, or (at your option) | |
12 | any later version. | |
13 | ||
14 | GAS is distributed in the hope that it will be useful, | |
15 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | GNU General Public License for more details. | |
18 | ||
19 | You should have received a copy of the GNU General Public License | |
20 | along with GAS; see the file COPYING. If not, write to the Free | |
21 | Software Foundation, 59 Temple Place - Suite 330, Boston, MA | |
22 | 02111-1307, USA. */ | |
23 | ||
24 | #include "config.h" | |
25 | ||
26 | /* AIX requires this to be the first thing in the file. */ | |
27 | #ifdef __GNUC__ | |
28 | # ifndef alloca | |
29 | # ifdef __STDC__ | |
30 | extern void *alloca (); | |
31 | # else | |
32 | extern char *alloca (); | |
33 | # endif | |
34 | # endif | |
35 | #else | |
36 | # if HAVE_ALLOCA_H | |
37 | # include <alloca.h> | |
38 | # else | |
39 | # ifdef _AIX | |
40 | #pragma alloca | |
41 | # else | |
42 | # ifndef alloca /* predefined by HP cc +Olibcalls */ | |
43 | # if !defined (__STDC__) && !defined (__hpux) | |
44 | extern char *alloca (); | |
45 | # else | |
46 | extern void *alloca (); | |
47 | # endif /* __STDC__, __hpux */ | |
48 | # endif /* alloca */ | |
49 | # endif /* _AIX */ | |
50 | # endif /* HAVE_ALLOCA_H */ | |
51 | #endif | |
52 | ||
53 | #include <stdio.h> | |
54 | #ifdef HAVE_STRING_H | |
55 | #include <string.h> | |
56 | #else | |
57 | #include <strings.h> | |
58 | #endif | |
59 | #include <ctype.h> | |
60 | #ifdef HAVE_STDLIB_H | |
61 | #include <stdlib.h> | |
62 | #endif | |
63 | #include "libiberty.h" | |
64 | #include "sb.h" | |
65 | #include "hash.h" | |
66 | #include "macro.h" | |
67 | ||
68 | #include "asintl.h" | |
69 | ||
70 | /* The routines in this file handle macro definition and expansion. | |
71 | They are called by both gasp and gas. */ | |
72 | ||
252b5132 RH |
73 | /* Internal functions. */ |
74 | ||
75 | static int get_token PARAMS ((int, sb *, sb *)); | |
76 | static int getstring PARAMS ((int, sb *, sb *)); | |
77 | static int get_any_string PARAMS ((int, sb *, sb *, int, int)); | |
78 | static int do_formals PARAMS ((macro_entry *, int, sb *)); | |
79 | static int get_apost_token PARAMS ((int, sb *, sb *, int)); | |
80 | static int sub_actual | |
81 | PARAMS ((int, sb *, sb *, struct hash_control *, int, sb *, int)); | |
82 | static const char *macro_expand_body | |
83 | PARAMS ((sb *, sb *, formal_entry *, struct hash_control *, int, int)); | |
84 | static const char *macro_expand PARAMS ((int, sb *, macro_entry *, sb *, int)); | |
85 | ||
86 | #define ISWHITE(x) ((x) == ' ' || (x) == '\t') | |
87 | ||
88 | #define ISSEP(x) \ | |
89 | ((x) == ' ' || (x) == '\t' || (x) == ',' || (x) == '"' || (x) == ';' \ | |
90 | || (x) == ')' || (x) == '(' \ | |
91 | || ((macro_alternate || macro_mri) && ((x) == '<' || (x) == '>'))) | |
92 | ||
93 | #define ISBASE(x) \ | |
94 | ((x) == 'b' || (x) == 'B' \ | |
95 | || (x) == 'q' || (x) == 'Q' \ | |
96 | || (x) == 'h' || (x) == 'H' \ | |
97 | || (x) == 'd' || (x) == 'D') | |
98 | ||
99 | /* The macro hash table. */ | |
100 | ||
101 | static struct hash_control *macro_hash; | |
102 | ||
103 | /* Whether any macros have been defined. */ | |
104 | ||
105 | int macro_defined; | |
106 | ||
107 | /* Whether we are in GASP alternate mode. */ | |
108 | ||
109 | static int macro_alternate; | |
110 | ||
111 | /* Whether we are in MRI mode. */ | |
112 | ||
113 | static int macro_mri; | |
114 | ||
115 | /* Whether we should strip '@' characters. */ | |
116 | ||
117 | static int macro_strip_at; | |
118 | ||
119 | /* Function to use to parse an expression. */ | |
120 | ||
121 | static int (*macro_expr) PARAMS ((const char *, int, sb *, int *)); | |
122 | ||
123 | /* Number of macro expansions that have been done. */ | |
124 | ||
125 | static int macro_number; | |
126 | ||
127 | /* Initialize macro processing. */ | |
128 | ||
129 | void | |
130 | macro_init (alternate, mri, strip_at, expr) | |
131 | int alternate; | |
132 | int mri; | |
133 | int strip_at; | |
134 | int (*expr) PARAMS ((const char *, int, sb *, int *)); | |
135 | { | |
136 | macro_hash = hash_new (); | |
137 | macro_defined = 0; | |
138 | macro_alternate = alternate; | |
139 | macro_mri = mri; | |
140 | macro_strip_at = strip_at; | |
141 | macro_expr = expr; | |
142 | } | |
143 | ||
144 | /* Switch in and out of MRI mode on the fly. */ | |
145 | ||
146 | void | |
147 | macro_mri_mode (mri) | |
148 | int mri; | |
149 | { | |
150 | macro_mri = mri; | |
151 | } | |
152 | ||
153 | /* Read input lines till we get to a TO string. | |
154 | Increase nesting depth if we get a FROM string. | |
155 | Put the results into sb at PTR. | |
156 | Add a new input line to an sb using GET_LINE. | |
157 | Return 1 on success, 0 on unexpected EOF. */ | |
158 | ||
159 | int | |
160 | buffer_and_nest (from, to, ptr, get_line) | |
161 | const char *from; | |
162 | const char *to; | |
163 | sb *ptr; | |
164 | int (*get_line) PARAMS ((sb *)); | |
165 | { | |
166 | int from_len = strlen (from); | |
167 | int to_len = strlen (to); | |
168 | int depth = 1; | |
169 | int line_start = ptr->len; | |
170 | ||
171 | int more = get_line (ptr); | |
172 | ||
173 | while (more) | |
174 | { | |
175 | /* Try and find the first pseudo op on the line */ | |
176 | int i = line_start; | |
177 | ||
178 | if (! macro_alternate && ! macro_mri) | |
179 | { | |
180 | /* With normal syntax we can suck what we want till we get | |
181 | to the dot. With the alternate, labels have to start in | |
182 | the first column, since we cant tell what's a label and | |
183 | whats a pseudoop */ | |
184 | ||
185 | /* Skip leading whitespace */ | |
186 | while (i < ptr->len && ISWHITE (ptr->ptr[i])) | |
187 | i++; | |
188 | ||
189 | /* Skip over a label */ | |
190 | while (i < ptr->len | |
191 | && (isalnum ((unsigned char) ptr->ptr[i]) | |
192 | || ptr->ptr[i] == '_' | |
193 | || ptr->ptr[i] == '$')) | |
194 | i++; | |
195 | ||
196 | /* And a colon */ | |
197 | if (i < ptr->len | |
198 | && ptr->ptr[i] == ':') | |
199 | i++; | |
200 | ||
201 | } | |
202 | /* Skip trailing whitespace */ | |
203 | while (i < ptr->len && ISWHITE (ptr->ptr[i])) | |
204 | i++; | |
205 | ||
206 | if (i < ptr->len && (ptr->ptr[i] == '.' | |
207 | || macro_alternate | |
208 | || macro_mri)) | |
209 | { | |
210 | if (ptr->ptr[i] == '.') | |
211 | i++; | |
c1eae114 | 212 | if (strncasecmp (ptr->ptr + i, from, from_len) == 0 |
92fa3950 | 213 | && (ptr->len == (i + from_len) || ! isalnum (ptr->ptr[i + from_len]))) |
252b5132 | 214 | depth++; |
c1eae114 | 215 | if (strncasecmp (ptr->ptr + i, to, to_len) == 0 |
035349a4 | 216 | && (ptr->len == (i + to_len) || ! isalnum (ptr->ptr[i + to_len]))) |
252b5132 RH |
217 | { |
218 | depth--; | |
219 | if (depth == 0) | |
220 | { | |
221 | /* Reset the string to not include the ending rune */ | |
222 | ptr->len = line_start; | |
223 | break; | |
224 | } | |
225 | } | |
226 | } | |
227 | ||
228 | /* Add a CR to the end and keep running */ | |
229 | sb_add_char (ptr, '\n'); | |
230 | line_start = ptr->len; | |
231 | more = get_line (ptr); | |
232 | } | |
233 | ||
234 | /* Return 1 on success, 0 on unexpected EOF. */ | |
235 | return depth == 0; | |
236 | } | |
237 | ||
238 | /* Pick up a token. */ | |
239 | ||
240 | static int | |
241 | get_token (idx, in, name) | |
242 | int idx; | |
243 | sb *in; | |
244 | sb *name; | |
245 | { | |
246 | if (idx < in->len | |
247 | && (isalpha ((unsigned char) in->ptr[idx]) | |
248 | || in->ptr[idx] == '_' | |
249 | || in->ptr[idx] == '$')) | |
250 | { | |
251 | sb_add_char (name, in->ptr[idx++]); | |
252 | while (idx < in->len | |
253 | && (isalnum ((unsigned char) in->ptr[idx]) | |
254 | || in->ptr[idx] == '_' | |
255 | || in->ptr[idx] == '$')) | |
256 | { | |
257 | sb_add_char (name, in->ptr[idx++]); | |
258 | } | |
259 | } | |
260 | /* Ignore trailing & */ | |
261 | if (macro_alternate && idx < in->len && in->ptr[idx] == '&') | |
262 | idx++; | |
263 | return idx; | |
264 | } | |
265 | ||
266 | /* Pick up a string. */ | |
267 | ||
268 | static int | |
269 | getstring (idx, in, acc) | |
270 | int idx; | |
271 | sb *in; | |
272 | sb *acc; | |
273 | { | |
274 | idx = sb_skip_white (idx, in); | |
275 | ||
276 | while (idx < in->len | |
277 | && (in->ptr[idx] == '"' | |
278 | || (in->ptr[idx] == '<' && (macro_alternate || macro_mri)) | |
279 | || (in->ptr[idx] == '\'' && macro_alternate))) | |
280 | { | |
281 | if (in->ptr[idx] == '<') | |
282 | { | |
283 | int nest = 0; | |
284 | idx++; | |
285 | while ((in->ptr[idx] != '>' || nest) | |
286 | && idx < in->len) | |
287 | { | |
288 | if (in->ptr[idx] == '!') | |
289 | { | |
290 | idx++ ; | |
291 | sb_add_char (acc, in->ptr[idx++]); | |
292 | } | |
293 | else | |
294 | { | |
295 | if (in->ptr[idx] == '>') | |
296 | nest--; | |
297 | if (in->ptr[idx] == '<') | |
298 | nest++; | |
299 | sb_add_char (acc, in->ptr[idx++]); | |
300 | } | |
301 | } | |
302 | idx++; | |
303 | } | |
304 | else if (in->ptr[idx] == '"' || in->ptr[idx] == '\'') | |
305 | { | |
306 | char tchar = in->ptr[idx]; | |
307 | idx++; | |
308 | while (idx < in->len) | |
309 | { | |
310 | if (macro_alternate && in->ptr[idx] == '!') | |
311 | { | |
312 | idx++ ; | |
313 | sb_add_char (acc, in->ptr[idx++]); | |
314 | } | |
315 | else | |
316 | { | |
317 | if (in->ptr[idx] == tchar) | |
318 | { | |
319 | idx++; | |
320 | if (idx >= in->len || in->ptr[idx] != tchar) | |
321 | break; | |
322 | } | |
323 | sb_add_char (acc, in->ptr[idx]); | |
324 | idx++; | |
325 | } | |
326 | } | |
327 | } | |
328 | } | |
329 | ||
330 | return idx; | |
331 | } | |
332 | ||
333 | /* Fetch string from the input stream, | |
334 | rules: | |
335 | 'Bxyx<whitespace> -> return 'Bxyza | |
336 | %<char> -> return string of decimal value of x | |
337 | "<string>" -> return string | |
338 | xyx<whitespace> -> return xyz | |
339 | */ | |
340 | ||
341 | static int | |
342 | get_any_string (idx, in, out, expand, pretend_quoted) | |
343 | int idx; | |
344 | sb *in; | |
345 | sb *out; | |
346 | int expand; | |
347 | int pretend_quoted; | |
348 | { | |
349 | sb_reset (out); | |
350 | idx = sb_skip_white (idx, in); | |
351 | ||
352 | if (idx < in->len) | |
353 | { | |
354 | if (in->len > 2 && in->ptr[idx+1] == '\'' && ISBASE (in->ptr[idx])) | |
355 | { | |
356 | while (!ISSEP (in->ptr[idx])) | |
357 | sb_add_char (out, in->ptr[idx++]); | |
358 | } | |
359 | else if (in->ptr[idx] == '%' | |
360 | && macro_alternate | |
361 | && expand) | |
362 | { | |
363 | int val; | |
364 | char buf[20]; | |
365 | /* Turns the next expression into a string */ | |
366 | idx = (*macro_expr) (_("% operator needs absolute expression"), | |
367 | idx + 1, | |
368 | in, | |
369 | &val); | |
370 | sprintf(buf, "%d", val); | |
371 | sb_add_string (out, buf); | |
372 | } | |
373 | else if (in->ptr[idx] == '"' | |
374 | || (in->ptr[idx] == '<' && (macro_alternate || macro_mri)) | |
375 | || (macro_alternate && in->ptr[idx] == '\'')) | |
376 | { | |
377 | if (macro_alternate | |
378 | && ! macro_strip_at | |
379 | && expand) | |
380 | { | |
381 | /* Keep the quotes */ | |
382 | sb_add_char (out, '\"'); | |
383 | ||
384 | idx = getstring (idx, in, out); | |
385 | sb_add_char (out, '\"'); | |
386 | } | |
387 | else | |
388 | { | |
389 | idx = getstring (idx, in, out); | |
390 | } | |
391 | } | |
392 | else | |
393 | { | |
394 | while (idx < in->len | |
395 | && (in->ptr[idx] == '"' | |
396 | || in->ptr[idx] == '\'' | |
397 | || pretend_quoted | |
398 | || (in->ptr[idx] != ' ' | |
399 | && in->ptr[idx] != '\t' | |
400 | && in->ptr[idx] != ',' | |
401 | && (in->ptr[idx] != '<' | |
402 | || (! macro_alternate && ! macro_mri))))) | |
403 | { | |
404 | if (in->ptr[idx] == '"' | |
405 | || in->ptr[idx] == '\'') | |
406 | { | |
407 | char tchar = in->ptr[idx]; | |
408 | sb_add_char (out, in->ptr[idx++]); | |
409 | while (idx < in->len | |
410 | && in->ptr[idx] != tchar) | |
411 | sb_add_char (out, in->ptr[idx++]); | |
412 | if (idx == in->len) | |
413 | return idx; | |
414 | } | |
415 | sb_add_char (out, in->ptr[idx++]); | |
416 | } | |
417 | } | |
418 | } | |
419 | ||
420 | return idx; | |
421 | } | |
422 | ||
423 | /* Pick up the formal parameters of a macro definition. */ | |
424 | ||
425 | static int | |
426 | do_formals (macro, idx, in) | |
427 | macro_entry *macro; | |
428 | int idx; | |
429 | sb *in; | |
430 | { | |
431 | formal_entry **p = ¯o->formals; | |
432 | ||
433 | macro->formal_count = 0; | |
434 | macro->formal_hash = hash_new (); | |
435 | while (idx < in->len) | |
436 | { | |
437 | formal_entry *formal; | |
438 | ||
439 | formal = (formal_entry *) xmalloc (sizeof (formal_entry)); | |
440 | ||
441 | sb_new (&formal->name); | |
442 | sb_new (&formal->def); | |
443 | sb_new (&formal->actual); | |
444 | ||
445 | idx = sb_skip_white (idx, in); | |
446 | idx = get_token (idx, in, &formal->name); | |
447 | if (formal->name.len == 0) | |
448 | break; | |
449 | idx = sb_skip_white (idx, in); | |
450 | if (formal->name.len) | |
451 | { | |
452 | /* This is a formal */ | |
453 | if (idx < in->len && in->ptr[idx] == '=') | |
454 | { | |
455 | /* Got a default */ | |
456 | idx = get_any_string (idx + 1, in, &formal->def, 1, 0); | |
457 | } | |
458 | } | |
459 | ||
460 | /* Add to macro's hash table */ | |
461 | hash_jam (macro->formal_hash, sb_terminate (&formal->name), formal); | |
462 | ||
463 | formal->index = macro->formal_count; | |
464 | idx = sb_skip_comma (idx, in); | |
465 | macro->formal_count++; | |
466 | *p = formal; | |
467 | p = &formal->next; | |
468 | *p = NULL; | |
469 | } | |
470 | ||
471 | if (macro_mri) | |
472 | { | |
473 | formal_entry *formal; | |
474 | const char *name; | |
475 | ||
476 | /* Add a special NARG formal, which macro_expand will set to the | |
477 | number of arguments. */ | |
478 | formal = (formal_entry *) xmalloc (sizeof (formal_entry)); | |
479 | ||
480 | sb_new (&formal->name); | |
481 | sb_new (&formal->def); | |
482 | sb_new (&formal->actual); | |
483 | ||
484 | /* The same MRI assemblers which treat '@' characters also use | |
485 | the name $NARG. At least until we find an exception. */ | |
486 | if (macro_strip_at) | |
487 | name = "$NARG"; | |
488 | else | |
489 | name = "NARG"; | |
490 | ||
491 | sb_add_string (&formal->name, name); | |
492 | ||
493 | /* Add to macro's hash table */ | |
494 | hash_jam (macro->formal_hash, name, formal); | |
495 | ||
496 | formal->index = NARG_INDEX; | |
497 | *p = formal; | |
498 | formal->next = NULL; | |
499 | } | |
500 | ||
501 | return idx; | |
502 | } | |
503 | ||
504 | /* Define a new macro. Returns NULL on success, otherwise returns an | |
505 | error message. If NAMEP is not NULL, *NAMEP is set to the name of | |
506 | the macro which was defined. */ | |
507 | ||
508 | const char * | |
509 | define_macro (idx, in, label, get_line, namep) | |
510 | int idx; | |
511 | sb *in; | |
512 | sb *label; | |
513 | int (*get_line) PARAMS ((sb *)); | |
514 | const char **namep; | |
515 | { | |
516 | macro_entry *macro; | |
517 | sb name; | |
518 | const char *namestr; | |
519 | ||
520 | macro = (macro_entry *) xmalloc (sizeof (macro_entry)); | |
521 | sb_new (¯o->sub); | |
522 | sb_new (&name); | |
523 | ||
524 | macro->formal_count = 0; | |
525 | macro->formals = 0; | |
526 | ||
527 | idx = sb_skip_white (idx, in); | |
528 | if (! buffer_and_nest ("MACRO", "ENDM", ¯o->sub, get_line)) | |
529 | return _("unexpected end of file in macro definition"); | |
530 | if (label != NULL && label->len != 0) | |
531 | { | |
532 | sb_add_sb (&name, label); | |
533 | if (idx < in->len && in->ptr[idx] == '(') | |
534 | { | |
535 | /* It's the label: MACRO (formals,...) sort */ | |
536 | idx = do_formals (macro, idx + 1, in); | |
537 | if (in->ptr[idx] != ')') | |
538 | return _("missing ) after formals"); | |
539 | } | |
540 | else | |
541 | { | |
542 | /* It's the label: MACRO formals,... sort */ | |
543 | idx = do_formals (macro, idx, in); | |
544 | } | |
545 | } | |
546 | else | |
547 | { | |
548 | idx = get_token (idx, in, &name); | |
549 | idx = sb_skip_comma (idx, in); | |
550 | idx = do_formals (macro, idx, in); | |
551 | } | |
552 | ||
553 | /* and stick it in the macro hash table */ | |
554 | for (idx = 0; idx < name.len; idx++) | |
555 | if (isupper ((unsigned char) name.ptr[idx])) | |
556 | name.ptr[idx] = tolower (name.ptr[idx]); | |
557 | namestr = sb_terminate (&name); | |
558 | hash_jam (macro_hash, namestr, (PTR) macro); | |
559 | ||
560 | macro_defined = 1; | |
561 | ||
562 | if (namep != NULL) | |
563 | *namep = namestr; | |
564 | ||
565 | return NULL; | |
566 | } | |
567 | ||
568 | /* Scan a token, and then skip KIND. */ | |
569 | ||
570 | static int | |
571 | get_apost_token (idx, in, name, kind) | |
572 | int idx; | |
573 | sb *in; | |
574 | sb *name; | |
575 | int kind; | |
576 | { | |
577 | idx = get_token (idx, in, name); | |
578 | if (idx < in->len | |
579 | && in->ptr[idx] == kind | |
580 | && (! macro_mri || macro_strip_at) | |
581 | && (! macro_strip_at || kind == '@')) | |
582 | idx++; | |
583 | return idx; | |
584 | } | |
585 | ||
586 | /* Substitute the actual value for a formal parameter. */ | |
587 | ||
588 | static int | |
589 | sub_actual (start, in, t, formal_hash, kind, out, copyifnotthere) | |
590 | int start; | |
591 | sb *in; | |
592 | sb *t; | |
593 | struct hash_control *formal_hash; | |
594 | int kind; | |
595 | sb *out; | |
596 | int copyifnotthere; | |
597 | { | |
598 | int src; | |
599 | formal_entry *ptr; | |
600 | ||
601 | src = get_apost_token (start, in, t, kind); | |
602 | /* See if it's in the macro's hash table, unless this is | |
603 | macro_strip_at and kind is '@' and the token did not end in '@'. */ | |
604 | if (macro_strip_at | |
605 | && kind == '@' | |
606 | && (src == start || in->ptr[src - 1] != '@')) | |
607 | ptr = NULL; | |
608 | else | |
609 | ptr = (formal_entry *) hash_find (formal_hash, sb_terminate (t)); | |
610 | if (ptr) | |
611 | { | |
612 | if (ptr->actual.len) | |
613 | { | |
614 | sb_add_sb (out, &ptr->actual); | |
615 | } | |
616 | else | |
617 | { | |
618 | sb_add_sb (out, &ptr->def); | |
619 | } | |
620 | } | |
621 | else if (kind == '&') | |
622 | { | |
623 | /* Doing this permits people to use & in macro bodies. */ | |
624 | sb_add_char (out, '&'); | |
625 | } | |
626 | else if (copyifnotthere) | |
627 | { | |
628 | sb_add_sb (out, t); | |
629 | } | |
630 | else | |
631 | { | |
632 | sb_add_char (out, '\\'); | |
633 | sb_add_sb (out, t); | |
634 | } | |
635 | return src; | |
636 | } | |
637 | ||
638 | /* Expand the body of a macro. */ | |
639 | ||
640 | static const char * | |
641 | macro_expand_body (in, out, formals, formal_hash, comment_char, locals) | |
642 | sb *in; | |
643 | sb *out; | |
644 | formal_entry *formals; | |
645 | struct hash_control *formal_hash; | |
646 | int comment_char; | |
647 | int locals; | |
648 | { | |
649 | sb t; | |
650 | int src = 0; | |
651 | int inquote = 0; | |
652 | formal_entry *loclist = NULL; | |
653 | ||
654 | sb_new (&t); | |
655 | ||
656 | while (src < in->len) | |
657 | { | |
658 | if (in->ptr[src] == '&') | |
659 | { | |
660 | sb_reset (&t); | |
661 | if (macro_mri) | |
662 | { | |
663 | if (src + 1 < in->len && in->ptr[src + 1] == '&') | |
664 | src = sub_actual (src + 2, in, &t, formal_hash, '\'', out, 1); | |
665 | else | |
666 | sb_add_char (out, in->ptr[src++]); | |
667 | } | |
668 | else | |
669 | { | |
670 | /* FIXME: Why do we do this? */ | |
671 | src = sub_actual (src + 1, in, &t, formal_hash, '&', out, 0); | |
672 | } | |
673 | } | |
674 | else if (in->ptr[src] == '\\') | |
675 | { | |
676 | src++; | |
677 | if (in->ptr[src] == comment_char && comment_char != '\0') | |
678 | { | |
679 | /* This is a comment, just drop the rest of the line */ | |
680 | while (src < in->len | |
681 | && in->ptr[src] != '\n') | |
682 | src++; | |
683 | } | |
684 | else if (in->ptr[src] == '(') | |
685 | { | |
686 | /* Sub in till the next ')' literally */ | |
687 | src++; | |
688 | while (src < in->len && in->ptr[src] != ')') | |
689 | { | |
690 | sb_add_char (out, in->ptr[src++]); | |
691 | } | |
692 | if (in->ptr[src] == ')') | |
693 | src++; | |
694 | else | |
695 | return _("missplaced )"); | |
696 | } | |
697 | else if (in->ptr[src] == '@') | |
698 | { | |
699 | /* Sub in the macro invocation number */ | |
700 | ||
701 | char buffer[10]; | |
702 | src++; | |
703 | sprintf (buffer, "%05d", macro_number); | |
704 | sb_add_string (out, buffer); | |
705 | } | |
706 | else if (in->ptr[src] == '&') | |
707 | { | |
708 | /* This is a preprocessor variable name, we don't do them | |
709 | here */ | |
710 | sb_add_char (out, '\\'); | |
711 | sb_add_char (out, '&'); | |
712 | src++; | |
713 | } | |
714 | else if (macro_mri | |
715 | && isalnum ((unsigned char) in->ptr[src])) | |
716 | { | |
717 | int ind; | |
718 | formal_entry *f; | |
719 | ||
720 | if (isdigit ((unsigned char) in->ptr[src])) | |
721 | ind = in->ptr[src] - '0'; | |
722 | else if (isupper ((unsigned char) in->ptr[src])) | |
723 | ind = in->ptr[src] - 'A' + 10; | |
724 | else | |
725 | ind = in->ptr[src] - 'a' + 10; | |
726 | ++src; | |
727 | for (f = formals; f != NULL; f = f->next) | |
728 | { | |
729 | if (f->index == ind - 1) | |
730 | { | |
731 | if (f->actual.len != 0) | |
732 | sb_add_sb (out, &f->actual); | |
733 | else | |
734 | sb_add_sb (out, &f->def); | |
735 | break; | |
736 | } | |
737 | } | |
738 | } | |
739 | else | |
740 | { | |
741 | sb_reset (&t); | |
742 | src = sub_actual (src, in, &t, formal_hash, '\'', out, 0); | |
743 | } | |
744 | } | |
745 | else if ((macro_alternate || macro_mri) | |
746 | && (isalpha ((unsigned char) in->ptr[src]) | |
747 | || in->ptr[src] == '_' | |
748 | || in->ptr[src] == '$') | |
749 | && (! inquote | |
750 | || ! macro_strip_at | |
751 | || (src > 0 && in->ptr[src - 1] == '@'))) | |
752 | { | |
753 | if (! locals | |
754 | || src + 5 >= in->len | |
755 | || strncasecmp (in->ptr + src, "LOCAL", 5) != 0 | |
756 | || ! ISWHITE (in->ptr[src + 5])) | |
757 | { | |
758 | sb_reset (&t); | |
759 | src = sub_actual (src, in, &t, formal_hash, | |
760 | (macro_strip_at && inquote) ? '@' : '\'', | |
761 | out, 1); | |
762 | } | |
763 | else | |
764 | { | |
765 | formal_entry *f; | |
766 | ||
767 | src = sb_skip_white (src + 5, in); | |
768 | while (in->ptr[src] != '\n' && in->ptr[src] != comment_char) | |
769 | { | |
770 | static int loccnt; | |
771 | char buf[20]; | |
772 | const char *err; | |
773 | ||
774 | f = (formal_entry *) xmalloc (sizeof (formal_entry)); | |
775 | sb_new (&f->name); | |
776 | sb_new (&f->def); | |
777 | sb_new (&f->actual); | |
778 | f->index = LOCAL_INDEX; | |
779 | f->next = loclist; | |
780 | loclist = f; | |
781 | ||
782 | src = get_token (src, in, &f->name); | |
783 | ++loccnt; | |
784 | sprintf (buf, "LL%04x", loccnt); | |
785 | sb_add_string (&f->actual, buf); | |
786 | ||
787 | err = hash_jam (formal_hash, sb_terminate (&f->name), f); | |
788 | if (err != NULL) | |
789 | return err; | |
790 | ||
791 | src = sb_skip_comma (src, in); | |
792 | } | |
793 | } | |
794 | } | |
795 | else if (comment_char != '\0' | |
796 | && in->ptr[src] == comment_char | |
797 | && src + 1 < in->len | |
798 | && in->ptr[src + 1] == comment_char | |
799 | && !inquote) | |
800 | { | |
801 | /* Two comment chars in a row cause the rest of the line to | |
802 | be dropped. */ | |
803 | while (src < in->len && in->ptr[src] != '\n') | |
804 | src++; | |
805 | } | |
806 | else if (in->ptr[src] == '"' | |
807 | || (macro_mri && in->ptr[src] == '\'')) | |
808 | { | |
809 | inquote = !inquote; | |
810 | sb_add_char (out, in->ptr[src++]); | |
811 | } | |
812 | else if (in->ptr[src] == '@' && macro_strip_at) | |
813 | { | |
814 | ++src; | |
815 | if (src < in->len | |
816 | && in->ptr[src] == '@') | |
817 | { | |
818 | sb_add_char (out, '@'); | |
819 | ++src; | |
820 | } | |
821 | } | |
822 | else if (macro_mri | |
823 | && in->ptr[src] == '=' | |
824 | && src + 1 < in->len | |
825 | && in->ptr[src + 1] == '=') | |
826 | { | |
827 | formal_entry *ptr; | |
828 | ||
829 | sb_reset (&t); | |
830 | src = get_token (src + 2, in, &t); | |
831 | ptr = (formal_entry *) hash_find (formal_hash, sb_terminate (&t)); | |
832 | if (ptr == NULL) | |
833 | { | |
834 | /* FIXME: We should really return a warning string here, | |
835 | but we can't, because the == might be in the MRI | |
836 | comment field, and, since the nature of the MRI | |
837 | comment field depends upon the exact instruction | |
838 | being used, we don't have enough information here to | |
839 | figure out whether it is or not. Instead, we leave | |
840 | the == in place, which should cause a syntax error if | |
841 | it is not in a comment. */ | |
842 | sb_add_char (out, '='); | |
843 | sb_add_char (out, '='); | |
844 | sb_add_sb (out, &t); | |
845 | } | |
846 | else | |
847 | { | |
848 | if (ptr->actual.len) | |
849 | { | |
850 | sb_add_string (out, "-1"); | |
851 | } | |
852 | else | |
853 | { | |
854 | sb_add_char (out, '0'); | |
855 | } | |
856 | } | |
857 | } | |
858 | else | |
859 | { | |
860 | sb_add_char (out, in->ptr[src++]); | |
861 | } | |
862 | } | |
863 | ||
864 | sb_kill (&t); | |
865 | ||
866 | while (loclist != NULL) | |
867 | { | |
868 | formal_entry *f; | |
869 | ||
870 | f = loclist->next; | |
1af6dcd2 ILT |
871 | /* Setting the value to NULL effectively deletes the entry. We |
872 | avoid calling hash_delete because it doesn't reclaim memory. */ | |
873 | hash_jam (formal_hash, sb_terminate (&loclist->name), NULL); | |
252b5132 RH |
874 | sb_kill (&loclist->name); |
875 | sb_kill (&loclist->def); | |
876 | sb_kill (&loclist->actual); | |
877 | free (loclist); | |
878 | loclist = f; | |
879 | } | |
880 | ||
881 | return NULL; | |
882 | } | |
883 | ||
884 | /* Assign values to the formal parameters of a macro, and expand the | |
885 | body. */ | |
886 | ||
887 | static const char * | |
888 | macro_expand (idx, in, m, out, comment_char) | |
889 | int idx; | |
890 | sb *in; | |
891 | macro_entry *m; | |
892 | sb *out; | |
893 | int comment_char; | |
894 | { | |
895 | sb t; | |
896 | formal_entry *ptr; | |
897 | formal_entry *f; | |
898 | int is_positional = 0; | |
899 | int is_keyword = 0; | |
900 | int narg = 0; | |
901 | const char *err; | |
902 | ||
903 | sb_new (&t); | |
904 | ||
905 | /* Reset any old value the actuals may have */ | |
906 | for (f = m->formals; f; f = f->next) | |
907 | sb_reset (&f->actual); | |
908 | f = m->formals; | |
909 | while (f != NULL && f->index < 0) | |
910 | f = f->next; | |
911 | ||
912 | if (macro_mri) | |
913 | { | |
914 | /* The macro may be called with an optional qualifier, which may | |
915 | be referred to in the macro body as \0. */ | |
916 | if (idx < in->len && in->ptr[idx] == '.') | |
917 | { | |
918 | formal_entry *n; | |
919 | ||
920 | n = (formal_entry *) xmalloc (sizeof (formal_entry)); | |
921 | sb_new (&n->name); | |
922 | sb_new (&n->def); | |
923 | sb_new (&n->actual); | |
924 | n->index = QUAL_INDEX; | |
925 | ||
926 | n->next = m->formals; | |
927 | m->formals = n; | |
928 | ||
929 | idx = get_any_string (idx + 1, in, &n->actual, 1, 0); | |
930 | } | |
931 | } | |
932 | ||
933 | /* Peel off the actuals and store them away in the hash tables' actuals */ | |
934 | idx = sb_skip_white (idx, in); | |
935 | while (idx < in->len && in->ptr[idx] != comment_char) | |
936 | { | |
937 | int scan; | |
938 | ||
939 | /* Look and see if it's a positional or keyword arg */ | |
940 | scan = idx; | |
941 | while (scan < in->len | |
942 | && !ISSEP (in->ptr[scan]) | |
943 | && !(macro_mri && in->ptr[scan] == '\'') | |
944 | && (!macro_alternate && in->ptr[scan] != '=')) | |
945 | scan++; | |
946 | if (scan < in->len && !macro_alternate && in->ptr[scan] == '=') | |
947 | { | |
948 | is_keyword = 1; | |
949 | ||
950 | /* It's OK to go from positional to keyword. */ | |
951 | ||
952 | /* This is a keyword arg, fetch the formal name and | |
953 | then the actual stuff */ | |
954 | sb_reset (&t); | |
955 | idx = get_token (idx, in, &t); | |
956 | if (in->ptr[idx] != '=') | |
957 | return _("confusion in formal parameters"); | |
958 | ||
959 | /* Lookup the formal in the macro's list */ | |
960 | ptr = (formal_entry *) hash_find (m->formal_hash, sb_terminate (&t)); | |
961 | if (!ptr) | |
962 | return _("macro formal argument does not exist"); | |
963 | else | |
964 | { | |
965 | /* Insert this value into the right place */ | |
966 | sb_reset (&ptr->actual); | |
967 | idx = get_any_string (idx + 1, in, &ptr->actual, 0, 0); | |
968 | if (ptr->actual.len > 0) | |
969 | ++narg; | |
970 | } | |
971 | } | |
972 | else | |
973 | { | |
974 | /* This is a positional arg */ | |
975 | is_positional = 1; | |
976 | if (is_keyword) | |
977 | return _("can't mix positional and keyword arguments"); | |
978 | ||
979 | if (!f) | |
980 | { | |
981 | formal_entry **pf; | |
982 | int c; | |
983 | ||
984 | if (!macro_mri) | |
985 | return _("too many positional arguments"); | |
986 | ||
987 | f = (formal_entry *) xmalloc (sizeof (formal_entry)); | |
988 | sb_new (&f->name); | |
989 | sb_new (&f->def); | |
990 | sb_new (&f->actual); | |
991 | f->next = NULL; | |
992 | ||
993 | c = -1; | |
994 | for (pf = &m->formals; *pf != NULL; pf = &(*pf)->next) | |
995 | if ((*pf)->index >= c) | |
996 | c = (*pf)->index + 1; | |
997 | if (c == -1) | |
998 | c = 0; | |
999 | *pf = f; | |
1000 | f->index = c; | |
1001 | } | |
1002 | ||
1003 | sb_reset (&f->actual); | |
1004 | idx = get_any_string (idx, in, &f->actual, 1, 0); | |
1005 | if (f->actual.len > 0) | |
1006 | ++narg; | |
1007 | do | |
1008 | { | |
1009 | f = f->next; | |
1010 | } | |
1011 | while (f != NULL && f->index < 0); | |
1012 | } | |
1013 | ||
1014 | if (! macro_mri) | |
1015 | idx = sb_skip_comma (idx, in); | |
1016 | else | |
1017 | { | |
1018 | if (in->ptr[idx] == ',') | |
1019 | ++idx; | |
1020 | if (ISWHITE (in->ptr[idx])) | |
1021 | break; | |
1022 | } | |
1023 | } | |
1024 | ||
1025 | if (macro_mri) | |
1026 | { | |
1027 | char buffer[20]; | |
1028 | ||
1029 | sb_reset (&t); | |
1030 | sb_add_string (&t, macro_strip_at ? "$NARG" : "NARG"); | |
1031 | ptr = (formal_entry *) hash_find (m->formal_hash, sb_terminate (&t)); | |
1032 | sb_reset (&ptr->actual); | |
1033 | sprintf (buffer, "%d", narg); | |
1034 | sb_add_string (&ptr->actual, buffer); | |
1035 | } | |
1036 | ||
1037 | err = macro_expand_body (&m->sub, out, m->formals, m->formal_hash, | |
1038 | comment_char, 1); | |
1039 | if (err != NULL) | |
1040 | return err; | |
1041 | ||
1042 | /* Discard any unnamed formal arguments. */ | |
1043 | if (macro_mri) | |
1044 | { | |
1045 | formal_entry **pf; | |
1046 | ||
1047 | pf = &m->formals; | |
1048 | while (*pf != NULL) | |
1049 | { | |
1050 | if ((*pf)->name.len != 0) | |
1051 | pf = &(*pf)->next; | |
1052 | else | |
1053 | { | |
1054 | sb_kill (&(*pf)->name); | |
1055 | sb_kill (&(*pf)->def); | |
1056 | sb_kill (&(*pf)->actual); | |
1057 | f = (*pf)->next; | |
1058 | free (*pf); | |
1059 | *pf = f; | |
1060 | } | |
1061 | } | |
1062 | } | |
1063 | ||
1064 | sb_kill (&t); | |
1065 | macro_number++; | |
1066 | ||
1067 | return NULL; | |
1068 | } | |
1069 | ||
1070 | /* Check for a macro. If one is found, put the expansion into | |
1071 | *EXPAND. COMMENT_CHAR is the comment character--this is used by | |
1072 | gasp. Return 1 if a macro is found, 0 otherwise. */ | |
1073 | ||
1074 | int | |
9f10757c | 1075 | check_macro (line, expand, comment_char, error, info) |
252b5132 RH |
1076 | const char *line; |
1077 | sb *expand; | |
1078 | int comment_char; | |
1079 | const char **error; | |
9f10757c | 1080 | macro_entry **info; |
252b5132 RH |
1081 | { |
1082 | const char *s; | |
1083 | char *copy, *cs; | |
1084 | macro_entry *macro; | |
1085 | sb line_sb; | |
1086 | ||
1087 | if (! isalpha ((unsigned char) *line) | |
1088 | && *line != '_' | |
1089 | && *line != '$' | |
1090 | && (! macro_mri || *line != '.')) | |
1091 | return 0; | |
1092 | ||
1093 | s = line + 1; | |
1094 | while (isalnum ((unsigned char) *s) | |
1095 | || *s == '_' | |
1096 | || *s == '$') | |
1097 | ++s; | |
1098 | ||
1099 | copy = (char *) alloca (s - line + 1); | |
1100 | memcpy (copy, line, s - line); | |
1101 | copy[s - line] = '\0'; | |
1102 | for (cs = copy; *cs != '\0'; cs++) | |
1103 | if (isupper ((unsigned char) *cs)) | |
1104 | *cs = tolower (*cs); | |
1105 | ||
1106 | macro = (macro_entry *) hash_find (macro_hash, copy); | |
1107 | ||
1108 | if (macro == NULL) | |
1109 | return 0; | |
1110 | ||
1111 | /* Wrap the line up in an sb. */ | |
1112 | sb_new (&line_sb); | |
1113 | while (*s != '\0' && *s != '\n' && *s != '\r') | |
1114 | sb_add_char (&line_sb, *s++); | |
1115 | ||
1116 | sb_new (expand); | |
1117 | *error = macro_expand (0, &line_sb, macro, expand, comment_char); | |
1118 | ||
1119 | sb_kill (&line_sb); | |
1120 | ||
9f10757c TW |
1121 | /* export the macro information if requested */ |
1122 | if (info) | |
1123 | *info = macro; | |
1124 | ||
252b5132 RH |
1125 | return 1; |
1126 | } | |
1127 | ||
1128 | /* Delete a macro. */ | |
1129 | ||
1130 | void | |
1131 | delete_macro (name) | |
1132 | const char *name; | |
1133 | { | |
1134 | hash_delete (macro_hash, name); | |
1135 | } | |
1136 | ||
1137 | /* Handle the MRI IRP and IRPC pseudo-ops. These are handled as a | |
1138 | combined macro definition and execution. This returns NULL on | |
1139 | success, or an error message otherwise. */ | |
1140 | ||
1141 | const char * | |
1142 | expand_irp (irpc, idx, in, out, get_line, comment_char) | |
1143 | int irpc; | |
1144 | int idx; | |
1145 | sb *in; | |
1146 | sb *out; | |
1147 | int (*get_line) PARAMS ((sb *)); | |
1148 | int comment_char; | |
1149 | { | |
1150 | const char *mn; | |
1151 | sb sub; | |
1152 | formal_entry f; | |
1153 | struct hash_control *h; | |
1154 | const char *err; | |
1155 | ||
1156 | if (irpc) | |
1157 | mn = "IRPC"; | |
1158 | else | |
1159 | mn = "IRP"; | |
1160 | ||
1161 | idx = sb_skip_white (idx, in); | |
1162 | ||
1163 | sb_new (&sub); | |
1164 | if (! buffer_and_nest (mn, "ENDR", &sub, get_line)) | |
1165 | return _("unexpected end of file in irp or irpc"); | |
1166 | ||
1167 | sb_new (&f.name); | |
1168 | sb_new (&f.def); | |
1169 | sb_new (&f.actual); | |
1170 | ||
1171 | idx = get_token (idx, in, &f.name); | |
1172 | if (f.name.len == 0) | |
1173 | return _("missing model parameter"); | |
1174 | ||
1175 | h = hash_new (); | |
1176 | err = hash_jam (h, sb_terminate (&f.name), &f); | |
1177 | if (err != NULL) | |
1178 | return err; | |
1179 | ||
1180 | f.index = 1; | |
1181 | f.next = NULL; | |
1182 | ||
1183 | sb_reset (out); | |
1184 | ||
1185 | idx = sb_skip_comma (idx, in); | |
1186 | if (idx >= in->len || in->ptr[idx] == comment_char) | |
1187 | { | |
1188 | /* Expand once with a null string. */ | |
1189 | err = macro_expand_body (&sub, out, &f, h, comment_char, 0); | |
1190 | if (err != NULL) | |
1191 | return err; | |
1192 | } | |
1193 | else | |
1194 | { | |
1195 | if (irpc && in->ptr[idx] == '"') | |
1196 | ++idx; | |
1197 | while (idx < in->len && in->ptr[idx] != comment_char) | |
1198 | { | |
1199 | if (!irpc) | |
1200 | idx = get_any_string (idx, in, &f.actual, 1, 0); | |
1201 | else | |
1202 | { | |
1203 | if (in->ptr[idx] == '"') | |
1204 | { | |
1205 | int nxt; | |
1206 | ||
1207 | nxt = sb_skip_white (idx + 1, in); | |
1208 | if (nxt >= in->len || in->ptr[nxt] == comment_char) | |
1209 | { | |
1210 | idx = nxt; | |
1211 | break; | |
1212 | } | |
1213 | } | |
1214 | sb_reset (&f.actual); | |
1215 | sb_add_char (&f.actual, in->ptr[idx]); | |
1216 | ++idx; | |
1217 | } | |
1218 | err = macro_expand_body (&sub, out, &f, h, comment_char, 0); | |
1219 | if (err != NULL) | |
1220 | return err; | |
1221 | if (!irpc) | |
1222 | idx = sb_skip_comma (idx, in); | |
1223 | else | |
1224 | idx = sb_skip_white (idx, in); | |
1225 | } | |
1226 | } | |
1227 | ||
1228 | hash_die (h); | |
1229 | sb_kill (&sub); | |
1230 | ||
1231 | return NULL; | |
1232 | } |