Commit | Line | Data |
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252b5132 | 1 | /* macro.c - macro support for gas and gasp |
f7e42eb4 | 2 | Copyright 1994, 1995, 1996, 1997, 1998, 1999, 2000 |
29f8404c | 3 | Free Software Foundation, Inc. |
252b5132 RH |
4 | |
5 | Written by Steve and Judy Chamberlain of Cygnus Support, | |
6 | sac@cygnus.com | |
7 | ||
8 | This file is part of GAS, the GNU Assembler. | |
9 | ||
10 | GAS is free software; you can redistribute it and/or modify | |
11 | it under the terms of the GNU General Public License as published by | |
12 | the Free Software Foundation; either version 2, or (at your option) | |
13 | any later version. | |
14 | ||
15 | GAS is distributed in the hope that it will be useful, | |
16 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
17 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
18 | GNU General Public License for more details. | |
19 | ||
20 | You should have received a copy of the GNU General Public License | |
21 | along with GAS; see the file COPYING. If not, write to the Free | |
22 | Software Foundation, 59 Temple Place - Suite 330, Boston, MA | |
29f8404c | 23 | 02111-1307, USA. */ |
252b5132 RH |
24 | |
25 | #include "config.h" | |
26 | ||
27 | /* AIX requires this to be the first thing in the file. */ | |
28 | #ifdef __GNUC__ | |
29 | # ifndef alloca | |
30 | # ifdef __STDC__ | |
31 | extern void *alloca (); | |
32 | # else | |
33 | extern char *alloca (); | |
34 | # endif | |
35 | # endif | |
36 | #else | |
37 | # if HAVE_ALLOCA_H | |
38 | # include <alloca.h> | |
39 | # else | |
40 | # ifdef _AIX | |
41 | #pragma alloca | |
42 | # else | |
43 | # ifndef alloca /* predefined by HP cc +Olibcalls */ | |
44 | # if !defined (__STDC__) && !defined (__hpux) | |
45 | extern char *alloca (); | |
46 | # else | |
47 | extern void *alloca (); | |
48 | # endif /* __STDC__, __hpux */ | |
49 | # endif /* alloca */ | |
50 | # endif /* _AIX */ | |
51 | # endif /* HAVE_ALLOCA_H */ | |
52 | #endif | |
53 | ||
54 | #include <stdio.h> | |
55 | #ifdef HAVE_STRING_H | |
56 | #include <string.h> | |
57 | #else | |
58 | #include <strings.h> | |
59 | #endif | |
60 | #include <ctype.h> | |
61 | #ifdef HAVE_STDLIB_H | |
62 | #include <stdlib.h> | |
63 | #endif | |
64 | #include "libiberty.h" | |
65 | #include "sb.h" | |
66 | #include "hash.h" | |
67 | #include "macro.h" | |
68 | ||
69 | #include "asintl.h" | |
70 | ||
71 | /* The routines in this file handle macro definition and expansion. | |
72 | They are called by both gasp and gas. */ | |
73 | ||
252b5132 RH |
74 | /* Internal functions. */ |
75 | ||
76 | static int get_token PARAMS ((int, sb *, sb *)); | |
77 | static int getstring PARAMS ((int, sb *, sb *)); | |
78 | static int get_any_string PARAMS ((int, sb *, sb *, int, int)); | |
79 | static int do_formals PARAMS ((macro_entry *, int, sb *)); | |
80 | static int get_apost_token PARAMS ((int, sb *, sb *, int)); | |
81 | static int sub_actual | |
82 | PARAMS ((int, sb *, sb *, struct hash_control *, int, sb *, int)); | |
83 | static const char *macro_expand_body | |
84 | PARAMS ((sb *, sb *, formal_entry *, struct hash_control *, int, int)); | |
85 | static const char *macro_expand PARAMS ((int, sb *, macro_entry *, sb *, int)); | |
86 | ||
87 | #define ISWHITE(x) ((x) == ' ' || (x) == '\t') | |
88 | ||
89 | #define ISSEP(x) \ | |
90 | ((x) == ' ' || (x) == '\t' || (x) == ',' || (x) == '"' || (x) == ';' \ | |
91 | || (x) == ')' || (x) == '(' \ | |
92 | || ((macro_alternate || macro_mri) && ((x) == '<' || (x) == '>'))) | |
93 | ||
94 | #define ISBASE(x) \ | |
95 | ((x) == 'b' || (x) == 'B' \ | |
96 | || (x) == 'q' || (x) == 'Q' \ | |
97 | || (x) == 'h' || (x) == 'H' \ | |
98 | || (x) == 'd' || (x) == 'D') | |
99 | ||
100 | /* The macro hash table. */ | |
101 | ||
102 | static struct hash_control *macro_hash; | |
103 | ||
104 | /* Whether any macros have been defined. */ | |
105 | ||
106 | int macro_defined; | |
107 | ||
108 | /* Whether we are in GASP alternate mode. */ | |
109 | ||
110 | static int macro_alternate; | |
111 | ||
112 | /* Whether we are in MRI mode. */ | |
113 | ||
114 | static int macro_mri; | |
115 | ||
116 | /* Whether we should strip '@' characters. */ | |
117 | ||
118 | static int macro_strip_at; | |
119 | ||
120 | /* Function to use to parse an expression. */ | |
121 | ||
122 | static int (*macro_expr) PARAMS ((const char *, int, sb *, int *)); | |
123 | ||
124 | /* Number of macro expansions that have been done. */ | |
125 | ||
126 | static int macro_number; | |
127 | ||
128 | /* Initialize macro processing. */ | |
129 | ||
130 | void | |
131 | macro_init (alternate, mri, strip_at, expr) | |
132 | int alternate; | |
133 | int mri; | |
134 | int strip_at; | |
135 | int (*expr) PARAMS ((const char *, int, sb *, int *)); | |
136 | { | |
137 | macro_hash = hash_new (); | |
138 | macro_defined = 0; | |
139 | macro_alternate = alternate; | |
140 | macro_mri = mri; | |
141 | macro_strip_at = strip_at; | |
142 | macro_expr = expr; | |
143 | } | |
144 | ||
145 | /* Switch in and out of MRI mode on the fly. */ | |
146 | ||
147 | void | |
148 | macro_mri_mode (mri) | |
149 | int mri; | |
150 | { | |
151 | macro_mri = mri; | |
152 | } | |
153 | ||
154 | /* Read input lines till we get to a TO string. | |
155 | Increase nesting depth if we get a FROM string. | |
156 | Put the results into sb at PTR. | |
157 | Add a new input line to an sb using GET_LINE. | |
158 | Return 1 on success, 0 on unexpected EOF. */ | |
159 | ||
160 | int | |
161 | buffer_and_nest (from, to, ptr, get_line) | |
162 | const char *from; | |
163 | const char *to; | |
164 | sb *ptr; | |
165 | int (*get_line) PARAMS ((sb *)); | |
166 | { | |
167 | int from_len = strlen (from); | |
168 | int to_len = strlen (to); | |
169 | int depth = 1; | |
170 | int line_start = ptr->len; | |
171 | ||
172 | int more = get_line (ptr); | |
173 | ||
174 | while (more) | |
175 | { | |
29f8404c | 176 | /* Try and find the first pseudo op on the line. */ |
252b5132 RH |
177 | int i = line_start; |
178 | ||
179 | if (! macro_alternate && ! macro_mri) | |
180 | { | |
181 | /* With normal syntax we can suck what we want till we get | |
182 | to the dot. With the alternate, labels have to start in | |
183 | the first column, since we cant tell what's a label and | |
29f8404c | 184 | whats a pseudoop. */ |
252b5132 | 185 | |
29f8404c | 186 | /* Skip leading whitespace. */ |
252b5132 RH |
187 | while (i < ptr->len && ISWHITE (ptr->ptr[i])) |
188 | i++; | |
189 | ||
29f8404c | 190 | /* Skip over a label. */ |
252b5132 RH |
191 | while (i < ptr->len |
192 | && (isalnum ((unsigned char) ptr->ptr[i]) | |
193 | || ptr->ptr[i] == '_' | |
194 | || ptr->ptr[i] == '$')) | |
195 | i++; | |
196 | ||
29f8404c | 197 | /* And a colon. */ |
252b5132 RH |
198 | if (i < ptr->len |
199 | && ptr->ptr[i] == ':') | |
200 | i++; | |
201 | ||
202 | } | |
29f8404c | 203 | /* Skip trailing whitespace. */ |
252b5132 RH |
204 | while (i < ptr->len && ISWHITE (ptr->ptr[i])) |
205 | i++; | |
206 | ||
207 | if (i < ptr->len && (ptr->ptr[i] == '.' | |
208 | || macro_alternate | |
209 | || macro_mri)) | |
210 | { | |
211 | if (ptr->ptr[i] == '.') | |
29f8404c | 212 | i++; |
c1eae114 | 213 | if (strncasecmp (ptr->ptr + i, from, from_len) == 0 |
29f8404c KH |
214 | && (ptr->len == (i + from_len) |
215 | || ! isalnum (ptr->ptr[i + from_len]))) | |
252b5132 | 216 | depth++; |
c1eae114 | 217 | if (strncasecmp (ptr->ptr + i, to, to_len) == 0 |
29f8404c KH |
218 | && (ptr->len == (i + to_len) |
219 | || ! isalnum (ptr->ptr[i + to_len]))) | |
252b5132 RH |
220 | { |
221 | depth--; | |
222 | if (depth == 0) | |
223 | { | |
29f8404c | 224 | /* Reset the string to not include the ending rune. */ |
252b5132 RH |
225 | ptr->len = line_start; |
226 | break; | |
227 | } | |
228 | } | |
229 | } | |
230 | ||
29f8404c | 231 | /* Add a CR to the end and keep running. */ |
252b5132 RH |
232 | sb_add_char (ptr, '\n'); |
233 | line_start = ptr->len; | |
234 | more = get_line (ptr); | |
235 | } | |
236 | ||
237 | /* Return 1 on success, 0 on unexpected EOF. */ | |
238 | return depth == 0; | |
239 | } | |
240 | ||
241 | /* Pick up a token. */ | |
242 | ||
243 | static int | |
244 | get_token (idx, in, name) | |
245 | int idx; | |
246 | sb *in; | |
247 | sb *name; | |
248 | { | |
249 | if (idx < in->len | |
250 | && (isalpha ((unsigned char) in->ptr[idx]) | |
251 | || in->ptr[idx] == '_' | |
252 | || in->ptr[idx] == '$')) | |
253 | { | |
254 | sb_add_char (name, in->ptr[idx++]); | |
255 | while (idx < in->len | |
256 | && (isalnum ((unsigned char) in->ptr[idx]) | |
257 | || in->ptr[idx] == '_' | |
258 | || in->ptr[idx] == '$')) | |
259 | { | |
260 | sb_add_char (name, in->ptr[idx++]); | |
261 | } | |
262 | } | |
29f8404c | 263 | /* Ignore trailing &. */ |
252b5132 RH |
264 | if (macro_alternate && idx < in->len && in->ptr[idx] == '&') |
265 | idx++; | |
266 | return idx; | |
267 | } | |
268 | ||
269 | /* Pick up a string. */ | |
270 | ||
271 | static int | |
272 | getstring (idx, in, acc) | |
273 | int idx; | |
274 | sb *in; | |
275 | sb *acc; | |
276 | { | |
277 | idx = sb_skip_white (idx, in); | |
278 | ||
279 | while (idx < in->len | |
29f8404c | 280 | && (in->ptr[idx] == '"' |
252b5132 RH |
281 | || (in->ptr[idx] == '<' && (macro_alternate || macro_mri)) |
282 | || (in->ptr[idx] == '\'' && macro_alternate))) | |
283 | { | |
284 | if (in->ptr[idx] == '<') | |
285 | { | |
286 | int nest = 0; | |
287 | idx++; | |
288 | while ((in->ptr[idx] != '>' || nest) | |
289 | && idx < in->len) | |
290 | { | |
291 | if (in->ptr[idx] == '!') | |
292 | { | |
29f8404c | 293 | idx++; |
252b5132 RH |
294 | sb_add_char (acc, in->ptr[idx++]); |
295 | } | |
296 | else | |
297 | { | |
298 | if (in->ptr[idx] == '>') | |
299 | nest--; | |
300 | if (in->ptr[idx] == '<') | |
301 | nest++; | |
302 | sb_add_char (acc, in->ptr[idx++]); | |
303 | } | |
304 | } | |
305 | idx++; | |
306 | } | |
307 | else if (in->ptr[idx] == '"' || in->ptr[idx] == '\'') | |
308 | { | |
309 | char tchar = in->ptr[idx]; | |
c06ae4f2 | 310 | int escaped = 0; |
29f8404c | 311 | |
252b5132 | 312 | idx++; |
29f8404c | 313 | |
252b5132 RH |
314 | while (idx < in->len) |
315 | { | |
29f8404c | 316 | if (in->ptr[idx - 1] == '\\') |
c06ae4f2 UC |
317 | escaped ^= 1; |
318 | else | |
319 | escaped = 0; | |
320 | ||
252b5132 RH |
321 | if (macro_alternate && in->ptr[idx] == '!') |
322 | { | |
e972090a | 323 | idx ++; |
29f8404c | 324 | |
1994a7c7 NC |
325 | sb_add_char (acc, in->ptr[idx]); |
326 | ||
e972090a | 327 | idx ++; |
252b5132 | 328 | } |
c06ae4f2 UC |
329 | else if (escaped && in->ptr[idx] == tchar) |
330 | { | |
331 | sb_add_char (acc, tchar); | |
e972090a | 332 | idx ++; |
c06ae4f2 | 333 | } |
252b5132 RH |
334 | else |
335 | { | |
336 | if (in->ptr[idx] == tchar) | |
337 | { | |
e972090a | 338 | idx ++; |
29f8404c | 339 | |
252b5132 RH |
340 | if (idx >= in->len || in->ptr[idx] != tchar) |
341 | break; | |
342 | } | |
29f8404c | 343 | |
252b5132 | 344 | sb_add_char (acc, in->ptr[idx]); |
e972090a | 345 | idx ++; |
252b5132 RH |
346 | } |
347 | } | |
348 | } | |
349 | } | |
29f8404c | 350 | |
252b5132 RH |
351 | return idx; |
352 | } | |
353 | ||
354 | /* Fetch string from the input stream, | |
355 | rules: | |
356 | 'Bxyx<whitespace> -> return 'Bxyza | |
357 | %<char> -> return string of decimal value of x | |
358 | "<string>" -> return string | |
359 | xyx<whitespace> -> return xyz | |
360 | */ | |
361 | ||
362 | static int | |
363 | get_any_string (idx, in, out, expand, pretend_quoted) | |
364 | int idx; | |
365 | sb *in; | |
366 | sb *out; | |
367 | int expand; | |
368 | int pretend_quoted; | |
369 | { | |
370 | sb_reset (out); | |
371 | idx = sb_skip_white (idx, in); | |
372 | ||
373 | if (idx < in->len) | |
374 | { | |
29f8404c | 375 | if (in->len > 2 && in->ptr[idx + 1] == '\'' && ISBASE (in->ptr[idx])) |
252b5132 RH |
376 | { |
377 | while (!ISSEP (in->ptr[idx])) | |
378 | sb_add_char (out, in->ptr[idx++]); | |
379 | } | |
380 | else if (in->ptr[idx] == '%' | |
381 | && macro_alternate | |
382 | && expand) | |
383 | { | |
384 | int val; | |
385 | char buf[20]; | |
29f8404c | 386 | /* Turns the next expression into a string. */ |
252b5132 RH |
387 | idx = (*macro_expr) (_("% operator needs absolute expression"), |
388 | idx + 1, | |
389 | in, | |
390 | &val); | |
391 | sprintf(buf, "%d", val); | |
392 | sb_add_string (out, buf); | |
393 | } | |
394 | else if (in->ptr[idx] == '"' | |
395 | || (in->ptr[idx] == '<' && (macro_alternate || macro_mri)) | |
396 | || (macro_alternate && in->ptr[idx] == '\'')) | |
397 | { | |
398 | if (macro_alternate | |
399 | && ! macro_strip_at | |
400 | && expand) | |
401 | { | |
29f8404c KH |
402 | /* Keep the quotes. */ |
403 | sb_add_char (out, '\"'); | |
252b5132 RH |
404 | |
405 | idx = getstring (idx, in, out); | |
29f8404c | 406 | sb_add_char (out, '\"'); |
252b5132 RH |
407 | } |
408 | else | |
409 | { | |
410 | idx = getstring (idx, in, out); | |
411 | } | |
412 | } | |
29f8404c | 413 | else |
252b5132 | 414 | { |
29f8404c | 415 | while (idx < in->len |
252b5132 RH |
416 | && (in->ptr[idx] == '"' |
417 | || in->ptr[idx] == '\'' | |
29f8404c | 418 | || pretend_quoted |
252b5132 RH |
419 | || (in->ptr[idx] != ' ' |
420 | && in->ptr[idx] != '\t' | |
421 | && in->ptr[idx] != ',' | |
422 | && (in->ptr[idx] != '<' | |
423 | || (! macro_alternate && ! macro_mri))))) | |
424 | { | |
29f8404c | 425 | if (in->ptr[idx] == '"' |
252b5132 RH |
426 | || in->ptr[idx] == '\'') |
427 | { | |
428 | char tchar = in->ptr[idx]; | |
429 | sb_add_char (out, in->ptr[idx++]); | |
430 | while (idx < in->len | |
431 | && in->ptr[idx] != tchar) | |
29f8404c | 432 | sb_add_char (out, in->ptr[idx++]); |
252b5132 | 433 | if (idx == in->len) |
29f8404c | 434 | return idx; |
252b5132 RH |
435 | } |
436 | sb_add_char (out, in->ptr[idx++]); | |
437 | } | |
438 | } | |
439 | } | |
440 | ||
441 | return idx; | |
442 | } | |
443 | ||
444 | /* Pick up the formal parameters of a macro definition. */ | |
445 | ||
446 | static int | |
447 | do_formals (macro, idx, in) | |
448 | macro_entry *macro; | |
449 | int idx; | |
450 | sb *in; | |
451 | { | |
452 | formal_entry **p = ¯o->formals; | |
453 | ||
454 | macro->formal_count = 0; | |
455 | macro->formal_hash = hash_new (); | |
456 | while (idx < in->len) | |
457 | { | |
458 | formal_entry *formal; | |
459 | ||
460 | formal = (formal_entry *) xmalloc (sizeof (formal_entry)); | |
461 | ||
462 | sb_new (&formal->name); | |
463 | sb_new (&formal->def); | |
464 | sb_new (&formal->actual); | |
465 | ||
466 | idx = sb_skip_white (idx, in); | |
467 | idx = get_token (idx, in, &formal->name); | |
468 | if (formal->name.len == 0) | |
469 | break; | |
470 | idx = sb_skip_white (idx, in); | |
471 | if (formal->name.len) | |
472 | { | |
29f8404c | 473 | /* This is a formal. */ |
252b5132 RH |
474 | if (idx < in->len && in->ptr[idx] == '=') |
475 | { | |
29f8404c | 476 | /* Got a default. */ |
252b5132 RH |
477 | idx = get_any_string (idx + 1, in, &formal->def, 1, 0); |
478 | } | |
479 | } | |
480 | ||
29f8404c | 481 | /* Add to macro's hash table. */ |
252b5132 RH |
482 | hash_jam (macro->formal_hash, sb_terminate (&formal->name), formal); |
483 | ||
484 | formal->index = macro->formal_count; | |
485 | idx = sb_skip_comma (idx, in); | |
486 | macro->formal_count++; | |
487 | *p = formal; | |
488 | p = &formal->next; | |
489 | *p = NULL; | |
490 | } | |
491 | ||
492 | if (macro_mri) | |
493 | { | |
494 | formal_entry *formal; | |
495 | const char *name; | |
496 | ||
497 | /* Add a special NARG formal, which macro_expand will set to the | |
498 | number of arguments. */ | |
499 | formal = (formal_entry *) xmalloc (sizeof (formal_entry)); | |
500 | ||
501 | sb_new (&formal->name); | |
502 | sb_new (&formal->def); | |
503 | sb_new (&formal->actual); | |
504 | ||
505 | /* The same MRI assemblers which treat '@' characters also use | |
506 | the name $NARG. At least until we find an exception. */ | |
507 | if (macro_strip_at) | |
508 | name = "$NARG"; | |
509 | else | |
510 | name = "NARG"; | |
511 | ||
512 | sb_add_string (&formal->name, name); | |
513 | ||
29f8404c | 514 | /* Add to macro's hash table. */ |
252b5132 RH |
515 | hash_jam (macro->formal_hash, name, formal); |
516 | ||
517 | formal->index = NARG_INDEX; | |
518 | *p = formal; | |
519 | formal->next = NULL; | |
520 | } | |
521 | ||
522 | return idx; | |
523 | } | |
524 | ||
525 | /* Define a new macro. Returns NULL on success, otherwise returns an | |
526 | error message. If NAMEP is not NULL, *NAMEP is set to the name of | |
527 | the macro which was defined. */ | |
528 | ||
529 | const char * | |
530 | define_macro (idx, in, label, get_line, namep) | |
531 | int idx; | |
532 | sb *in; | |
533 | sb *label; | |
534 | int (*get_line) PARAMS ((sb *)); | |
535 | const char **namep; | |
536 | { | |
537 | macro_entry *macro; | |
538 | sb name; | |
539 | const char *namestr; | |
540 | ||
541 | macro = (macro_entry *) xmalloc (sizeof (macro_entry)); | |
542 | sb_new (¯o->sub); | |
543 | sb_new (&name); | |
544 | ||
545 | macro->formal_count = 0; | |
546 | macro->formals = 0; | |
547 | ||
548 | idx = sb_skip_white (idx, in); | |
549 | if (! buffer_and_nest ("MACRO", "ENDM", ¯o->sub, get_line)) | |
550 | return _("unexpected end of file in macro definition"); | |
551 | if (label != NULL && label->len != 0) | |
552 | { | |
553 | sb_add_sb (&name, label); | |
554 | if (idx < in->len && in->ptr[idx] == '(') | |
555 | { | |
29f8404c | 556 | /* It's the label: MACRO (formals,...) sort */ |
252b5132 RH |
557 | idx = do_formals (macro, idx + 1, in); |
558 | if (in->ptr[idx] != ')') | |
559 | return _("missing ) after formals"); | |
560 | } | |
561 | else | |
562 | { | |
29f8404c | 563 | /* It's the label: MACRO formals,... sort */ |
252b5132 RH |
564 | idx = do_formals (macro, idx, in); |
565 | } | |
566 | } | |
567 | else | |
568 | { | |
569 | idx = get_token (idx, in, &name); | |
570 | idx = sb_skip_comma (idx, in); | |
571 | idx = do_formals (macro, idx, in); | |
572 | } | |
573 | ||
29f8404c | 574 | /* And stick it in the macro hash table. */ |
252b5132 RH |
575 | for (idx = 0; idx < name.len; idx++) |
576 | if (isupper ((unsigned char) name.ptr[idx])) | |
577 | name.ptr[idx] = tolower (name.ptr[idx]); | |
578 | namestr = sb_terminate (&name); | |
579 | hash_jam (macro_hash, namestr, (PTR) macro); | |
580 | ||
581 | macro_defined = 1; | |
582 | ||
583 | if (namep != NULL) | |
584 | *namep = namestr; | |
585 | ||
586 | return NULL; | |
587 | } | |
588 | ||
589 | /* Scan a token, and then skip KIND. */ | |
590 | ||
591 | static int | |
592 | get_apost_token (idx, in, name, kind) | |
593 | int idx; | |
594 | sb *in; | |
595 | sb *name; | |
596 | int kind; | |
597 | { | |
598 | idx = get_token (idx, in, name); | |
599 | if (idx < in->len | |
600 | && in->ptr[idx] == kind | |
601 | && (! macro_mri || macro_strip_at) | |
602 | && (! macro_strip_at || kind == '@')) | |
603 | idx++; | |
604 | return idx; | |
605 | } | |
606 | ||
607 | /* Substitute the actual value for a formal parameter. */ | |
608 | ||
609 | static int | |
610 | sub_actual (start, in, t, formal_hash, kind, out, copyifnotthere) | |
611 | int start; | |
612 | sb *in; | |
613 | sb *t; | |
614 | struct hash_control *formal_hash; | |
615 | int kind; | |
616 | sb *out; | |
617 | int copyifnotthere; | |
618 | { | |
619 | int src; | |
620 | formal_entry *ptr; | |
621 | ||
622 | src = get_apost_token (start, in, t, kind); | |
623 | /* See if it's in the macro's hash table, unless this is | |
624 | macro_strip_at and kind is '@' and the token did not end in '@'. */ | |
625 | if (macro_strip_at | |
626 | && kind == '@' | |
627 | && (src == start || in->ptr[src - 1] != '@')) | |
628 | ptr = NULL; | |
629 | else | |
630 | ptr = (formal_entry *) hash_find (formal_hash, sb_terminate (t)); | |
631 | if (ptr) | |
632 | { | |
633 | if (ptr->actual.len) | |
634 | { | |
635 | sb_add_sb (out, &ptr->actual); | |
636 | } | |
637 | else | |
638 | { | |
639 | sb_add_sb (out, &ptr->def); | |
640 | } | |
641 | } | |
642 | else if (kind == '&') | |
643 | { | |
644 | /* Doing this permits people to use & in macro bodies. */ | |
645 | sb_add_char (out, '&'); | |
646 | } | |
647 | else if (copyifnotthere) | |
648 | { | |
649 | sb_add_sb (out, t); | |
650 | } | |
29f8404c | 651 | else |
252b5132 RH |
652 | { |
653 | sb_add_char (out, '\\'); | |
654 | sb_add_sb (out, t); | |
655 | } | |
656 | return src; | |
657 | } | |
658 | ||
659 | /* Expand the body of a macro. */ | |
660 | ||
661 | static const char * | |
662 | macro_expand_body (in, out, formals, formal_hash, comment_char, locals) | |
663 | sb *in; | |
664 | sb *out; | |
665 | formal_entry *formals; | |
666 | struct hash_control *formal_hash; | |
667 | int comment_char; | |
668 | int locals; | |
669 | { | |
670 | sb t; | |
671 | int src = 0; | |
672 | int inquote = 0; | |
673 | formal_entry *loclist = NULL; | |
674 | ||
675 | sb_new (&t); | |
676 | ||
677 | while (src < in->len) | |
678 | { | |
679 | if (in->ptr[src] == '&') | |
680 | { | |
681 | sb_reset (&t); | |
682 | if (macro_mri) | |
683 | { | |
684 | if (src + 1 < in->len && in->ptr[src + 1] == '&') | |
685 | src = sub_actual (src + 2, in, &t, formal_hash, '\'', out, 1); | |
686 | else | |
687 | sb_add_char (out, in->ptr[src++]); | |
688 | } | |
689 | else | |
690 | { | |
691 | /* FIXME: Why do we do this? */ | |
692 | src = sub_actual (src + 1, in, &t, formal_hash, '&', out, 0); | |
693 | } | |
694 | } | |
695 | else if (in->ptr[src] == '\\') | |
696 | { | |
697 | src++; | |
698 | if (in->ptr[src] == comment_char && comment_char != '\0') | |
699 | { | |
29f8404c | 700 | /* This is a comment, just drop the rest of the line. */ |
252b5132 RH |
701 | while (src < in->len |
702 | && in->ptr[src] != '\n') | |
703 | src++; | |
704 | } | |
705 | else if (in->ptr[src] == '(') | |
706 | { | |
29f8404c | 707 | /* Sub in till the next ')' literally. */ |
252b5132 RH |
708 | src++; |
709 | while (src < in->len && in->ptr[src] != ')') | |
710 | { | |
711 | sb_add_char (out, in->ptr[src++]); | |
712 | } | |
713 | if (in->ptr[src] == ')') | |
714 | src++; | |
715 | else | |
716 | return _("missplaced )"); | |
717 | } | |
718 | else if (in->ptr[src] == '@') | |
719 | { | |
29f8404c | 720 | /* Sub in the macro invocation number. */ |
252b5132 RH |
721 | |
722 | char buffer[10]; | |
723 | src++; | |
a2984248 | 724 | sprintf (buffer, "%d", macro_number); |
252b5132 RH |
725 | sb_add_string (out, buffer); |
726 | } | |
727 | else if (in->ptr[src] == '&') | |
728 | { | |
729 | /* This is a preprocessor variable name, we don't do them | |
29f8404c | 730 | here. */ |
252b5132 RH |
731 | sb_add_char (out, '\\'); |
732 | sb_add_char (out, '&'); | |
733 | src++; | |
734 | } | |
735 | else if (macro_mri | |
736 | && isalnum ((unsigned char) in->ptr[src])) | |
737 | { | |
738 | int ind; | |
739 | formal_entry *f; | |
740 | ||
741 | if (isdigit ((unsigned char) in->ptr[src])) | |
742 | ind = in->ptr[src] - '0'; | |
743 | else if (isupper ((unsigned char) in->ptr[src])) | |
744 | ind = in->ptr[src] - 'A' + 10; | |
745 | else | |
746 | ind = in->ptr[src] - 'a' + 10; | |
747 | ++src; | |
748 | for (f = formals; f != NULL; f = f->next) | |
749 | { | |
750 | if (f->index == ind - 1) | |
751 | { | |
752 | if (f->actual.len != 0) | |
753 | sb_add_sb (out, &f->actual); | |
754 | else | |
755 | sb_add_sb (out, &f->def); | |
756 | break; | |
757 | } | |
758 | } | |
759 | } | |
760 | else | |
761 | { | |
762 | sb_reset (&t); | |
763 | src = sub_actual (src, in, &t, formal_hash, '\'', out, 0); | |
764 | } | |
765 | } | |
766 | else if ((macro_alternate || macro_mri) | |
767 | && (isalpha ((unsigned char) in->ptr[src]) | |
768 | || in->ptr[src] == '_' | |
769 | || in->ptr[src] == '$') | |
770 | && (! inquote | |
771 | || ! macro_strip_at | |
772 | || (src > 0 && in->ptr[src - 1] == '@'))) | |
773 | { | |
774 | if (! locals | |
775 | || src + 5 >= in->len | |
776 | || strncasecmp (in->ptr + src, "LOCAL", 5) != 0 | |
777 | || ! ISWHITE (in->ptr[src + 5])) | |
778 | { | |
779 | sb_reset (&t); | |
780 | src = sub_actual (src, in, &t, formal_hash, | |
781 | (macro_strip_at && inquote) ? '@' : '\'', | |
782 | out, 1); | |
783 | } | |
784 | else | |
785 | { | |
786 | formal_entry *f; | |
787 | ||
788 | src = sb_skip_white (src + 5, in); | |
789 | while (in->ptr[src] != '\n' && in->ptr[src] != comment_char) | |
790 | { | |
791 | static int loccnt; | |
792 | char buf[20]; | |
793 | const char *err; | |
794 | ||
795 | f = (formal_entry *) xmalloc (sizeof (formal_entry)); | |
796 | sb_new (&f->name); | |
797 | sb_new (&f->def); | |
798 | sb_new (&f->actual); | |
799 | f->index = LOCAL_INDEX; | |
800 | f->next = loclist; | |
801 | loclist = f; | |
802 | ||
803 | src = get_token (src, in, &f->name); | |
804 | ++loccnt; | |
805 | sprintf (buf, "LL%04x", loccnt); | |
806 | sb_add_string (&f->actual, buf); | |
807 | ||
808 | err = hash_jam (formal_hash, sb_terminate (&f->name), f); | |
809 | if (err != NULL) | |
810 | return err; | |
811 | ||
812 | src = sb_skip_comma (src, in); | |
813 | } | |
814 | } | |
815 | } | |
816 | else if (comment_char != '\0' | |
817 | && in->ptr[src] == comment_char | |
818 | && src + 1 < in->len | |
819 | && in->ptr[src + 1] == comment_char | |
820 | && !inquote) | |
821 | { | |
822 | /* Two comment chars in a row cause the rest of the line to | |
823 | be dropped. */ | |
824 | while (src < in->len && in->ptr[src] != '\n') | |
825 | src++; | |
826 | } | |
827 | else if (in->ptr[src] == '"' | |
828 | || (macro_mri && in->ptr[src] == '\'')) | |
829 | { | |
830 | inquote = !inquote; | |
831 | sb_add_char (out, in->ptr[src++]); | |
832 | } | |
833 | else if (in->ptr[src] == '@' && macro_strip_at) | |
834 | { | |
835 | ++src; | |
836 | if (src < in->len | |
837 | && in->ptr[src] == '@') | |
838 | { | |
839 | sb_add_char (out, '@'); | |
840 | ++src; | |
841 | } | |
842 | } | |
843 | else if (macro_mri | |
844 | && in->ptr[src] == '=' | |
845 | && src + 1 < in->len | |
846 | && in->ptr[src + 1] == '=') | |
847 | { | |
848 | formal_entry *ptr; | |
849 | ||
850 | sb_reset (&t); | |
851 | src = get_token (src + 2, in, &t); | |
852 | ptr = (formal_entry *) hash_find (formal_hash, sb_terminate (&t)); | |
853 | if (ptr == NULL) | |
854 | { | |
855 | /* FIXME: We should really return a warning string here, | |
856 | but we can't, because the == might be in the MRI | |
857 | comment field, and, since the nature of the MRI | |
858 | comment field depends upon the exact instruction | |
859 | being used, we don't have enough information here to | |
860 | figure out whether it is or not. Instead, we leave | |
861 | the == in place, which should cause a syntax error if | |
862 | it is not in a comment. */ | |
863 | sb_add_char (out, '='); | |
864 | sb_add_char (out, '='); | |
865 | sb_add_sb (out, &t); | |
866 | } | |
867 | else | |
868 | { | |
869 | if (ptr->actual.len) | |
870 | { | |
871 | sb_add_string (out, "-1"); | |
872 | } | |
873 | else | |
874 | { | |
875 | sb_add_char (out, '0'); | |
876 | } | |
877 | } | |
878 | } | |
879 | else | |
880 | { | |
881 | sb_add_char (out, in->ptr[src++]); | |
882 | } | |
883 | } | |
884 | ||
885 | sb_kill (&t); | |
886 | ||
887 | while (loclist != NULL) | |
888 | { | |
889 | formal_entry *f; | |
890 | ||
891 | f = loclist->next; | |
1af6dcd2 ILT |
892 | /* Setting the value to NULL effectively deletes the entry. We |
893 | avoid calling hash_delete because it doesn't reclaim memory. */ | |
894 | hash_jam (formal_hash, sb_terminate (&loclist->name), NULL); | |
252b5132 RH |
895 | sb_kill (&loclist->name); |
896 | sb_kill (&loclist->def); | |
897 | sb_kill (&loclist->actual); | |
898 | free (loclist); | |
899 | loclist = f; | |
900 | } | |
901 | ||
902 | return NULL; | |
903 | } | |
904 | ||
905 | /* Assign values to the formal parameters of a macro, and expand the | |
906 | body. */ | |
907 | ||
908 | static const char * | |
909 | macro_expand (idx, in, m, out, comment_char) | |
910 | int idx; | |
911 | sb *in; | |
912 | macro_entry *m; | |
913 | sb *out; | |
914 | int comment_char; | |
915 | { | |
916 | sb t; | |
917 | formal_entry *ptr; | |
918 | formal_entry *f; | |
919 | int is_positional = 0; | |
920 | int is_keyword = 0; | |
921 | int narg = 0; | |
922 | const char *err; | |
923 | ||
924 | sb_new (&t); | |
29f8404c KH |
925 | |
926 | /* Reset any old value the actuals may have. */ | |
252b5132 | 927 | for (f = m->formals; f; f = f->next) |
29f8404c | 928 | sb_reset (&f->actual); |
252b5132 RH |
929 | f = m->formals; |
930 | while (f != NULL && f->index < 0) | |
931 | f = f->next; | |
932 | ||
933 | if (macro_mri) | |
934 | { | |
935 | /* The macro may be called with an optional qualifier, which may | |
936 | be referred to in the macro body as \0. */ | |
937 | if (idx < in->len && in->ptr[idx] == '.') | |
938 | { | |
939 | formal_entry *n; | |
940 | ||
941 | n = (formal_entry *) xmalloc (sizeof (formal_entry)); | |
942 | sb_new (&n->name); | |
943 | sb_new (&n->def); | |
944 | sb_new (&n->actual); | |
945 | n->index = QUAL_INDEX; | |
946 | ||
947 | n->next = m->formals; | |
948 | m->formals = n; | |
949 | ||
950 | idx = get_any_string (idx + 1, in, &n->actual, 1, 0); | |
951 | } | |
952 | } | |
953 | ||
29f8404c | 954 | /* Peel off the actuals and store them away in the hash tables' actuals. */ |
252b5132 RH |
955 | idx = sb_skip_white (idx, in); |
956 | while (idx < in->len && in->ptr[idx] != comment_char) | |
957 | { | |
958 | int scan; | |
959 | ||
29f8404c | 960 | /* Look and see if it's a positional or keyword arg. */ |
252b5132 RH |
961 | scan = idx; |
962 | while (scan < in->len | |
963 | && !ISSEP (in->ptr[scan]) | |
964 | && !(macro_mri && in->ptr[scan] == '\'') | |
965 | && (!macro_alternate && in->ptr[scan] != '=')) | |
966 | scan++; | |
967 | if (scan < in->len && !macro_alternate && in->ptr[scan] == '=') | |
968 | { | |
969 | is_keyword = 1; | |
970 | ||
971 | /* It's OK to go from positional to keyword. */ | |
972 | ||
973 | /* This is a keyword arg, fetch the formal name and | |
29f8404c | 974 | then the actual stuff. */ |
252b5132 RH |
975 | sb_reset (&t); |
976 | idx = get_token (idx, in, &t); | |
977 | if (in->ptr[idx] != '=') | |
978 | return _("confusion in formal parameters"); | |
979 | ||
29f8404c | 980 | /* Lookup the formal in the macro's list. */ |
252b5132 RH |
981 | ptr = (formal_entry *) hash_find (m->formal_hash, sb_terminate (&t)); |
982 | if (!ptr) | |
983 | return _("macro formal argument does not exist"); | |
984 | else | |
985 | { | |
29f8404c | 986 | /* Insert this value into the right place. */ |
252b5132 RH |
987 | sb_reset (&ptr->actual); |
988 | idx = get_any_string (idx + 1, in, &ptr->actual, 0, 0); | |
989 | if (ptr->actual.len > 0) | |
990 | ++narg; | |
991 | } | |
992 | } | |
993 | else | |
994 | { | |
29f8404c | 995 | /* This is a positional arg. */ |
252b5132 RH |
996 | is_positional = 1; |
997 | if (is_keyword) | |
998 | return _("can't mix positional and keyword arguments"); | |
999 | ||
1000 | if (!f) | |
1001 | { | |
1002 | formal_entry **pf; | |
1003 | int c; | |
1004 | ||
1005 | if (!macro_mri) | |
1006 | return _("too many positional arguments"); | |
1007 | ||
1008 | f = (formal_entry *) xmalloc (sizeof (formal_entry)); | |
1009 | sb_new (&f->name); | |
1010 | sb_new (&f->def); | |
1011 | sb_new (&f->actual); | |
1012 | f->next = NULL; | |
1013 | ||
1014 | c = -1; | |
1015 | for (pf = &m->formals; *pf != NULL; pf = &(*pf)->next) | |
1016 | if ((*pf)->index >= c) | |
1017 | c = (*pf)->index + 1; | |
1018 | if (c == -1) | |
1019 | c = 0; | |
1020 | *pf = f; | |
1021 | f->index = c; | |
1022 | } | |
1023 | ||
1024 | sb_reset (&f->actual); | |
1025 | idx = get_any_string (idx, in, &f->actual, 1, 0); | |
1026 | if (f->actual.len > 0) | |
1027 | ++narg; | |
1028 | do | |
1029 | { | |
1030 | f = f->next; | |
1031 | } | |
1032 | while (f != NULL && f->index < 0); | |
1033 | } | |
1034 | ||
1035 | if (! macro_mri) | |
1036 | idx = sb_skip_comma (idx, in); | |
1037 | else | |
1038 | { | |
1039 | if (in->ptr[idx] == ',') | |
1040 | ++idx; | |
1041 | if (ISWHITE (in->ptr[idx])) | |
1042 | break; | |
1043 | } | |
1044 | } | |
1045 | ||
1046 | if (macro_mri) | |
1047 | { | |
1048 | char buffer[20]; | |
1049 | ||
1050 | sb_reset (&t); | |
1051 | sb_add_string (&t, macro_strip_at ? "$NARG" : "NARG"); | |
1052 | ptr = (formal_entry *) hash_find (m->formal_hash, sb_terminate (&t)); | |
1053 | sb_reset (&ptr->actual); | |
1054 | sprintf (buffer, "%d", narg); | |
1055 | sb_add_string (&ptr->actual, buffer); | |
1056 | } | |
1057 | ||
1058 | err = macro_expand_body (&m->sub, out, m->formals, m->formal_hash, | |
1059 | comment_char, 1); | |
1060 | if (err != NULL) | |
1061 | return err; | |
1062 | ||
1063 | /* Discard any unnamed formal arguments. */ | |
1064 | if (macro_mri) | |
1065 | { | |
1066 | formal_entry **pf; | |
1067 | ||
1068 | pf = &m->formals; | |
1069 | while (*pf != NULL) | |
1070 | { | |
1071 | if ((*pf)->name.len != 0) | |
1072 | pf = &(*pf)->next; | |
1073 | else | |
1074 | { | |
1075 | sb_kill (&(*pf)->name); | |
1076 | sb_kill (&(*pf)->def); | |
1077 | sb_kill (&(*pf)->actual); | |
1078 | f = (*pf)->next; | |
1079 | free (*pf); | |
1080 | *pf = f; | |
1081 | } | |
1082 | } | |
1083 | } | |
1084 | ||
1085 | sb_kill (&t); | |
1086 | macro_number++; | |
1087 | ||
1088 | return NULL; | |
1089 | } | |
1090 | ||
1091 | /* Check for a macro. If one is found, put the expansion into | |
1092 | *EXPAND. COMMENT_CHAR is the comment character--this is used by | |
1093 | gasp. Return 1 if a macro is found, 0 otherwise. */ | |
1094 | ||
1095 | int | |
9f10757c | 1096 | check_macro (line, expand, comment_char, error, info) |
252b5132 RH |
1097 | const char *line; |
1098 | sb *expand; | |
1099 | int comment_char; | |
1100 | const char **error; | |
9f10757c | 1101 | macro_entry **info; |
252b5132 RH |
1102 | { |
1103 | const char *s; | |
1104 | char *copy, *cs; | |
1105 | macro_entry *macro; | |
1106 | sb line_sb; | |
1107 | ||
1108 | if (! isalpha ((unsigned char) *line) | |
1109 | && *line != '_' | |
1110 | && *line != '$' | |
1111 | && (! macro_mri || *line != '.')) | |
1112 | return 0; | |
1113 | ||
1114 | s = line + 1; | |
1115 | while (isalnum ((unsigned char) *s) | |
1116 | || *s == '_' | |
1117 | || *s == '$') | |
1118 | ++s; | |
1119 | ||
1120 | copy = (char *) alloca (s - line + 1); | |
1121 | memcpy (copy, line, s - line); | |
1122 | copy[s - line] = '\0'; | |
1123 | for (cs = copy; *cs != '\0'; cs++) | |
1124 | if (isupper ((unsigned char) *cs)) | |
1125 | *cs = tolower (*cs); | |
1126 | ||
1127 | macro = (macro_entry *) hash_find (macro_hash, copy); | |
1128 | ||
1129 | if (macro == NULL) | |
1130 | return 0; | |
1131 | ||
1132 | /* Wrap the line up in an sb. */ | |
1133 | sb_new (&line_sb); | |
1134 | while (*s != '\0' && *s != '\n' && *s != '\r') | |
1135 | sb_add_char (&line_sb, *s++); | |
1136 | ||
1137 | sb_new (expand); | |
1138 | *error = macro_expand (0, &line_sb, macro, expand, comment_char); | |
1139 | ||
1140 | sb_kill (&line_sb); | |
1141 | ||
29f8404c | 1142 | /* Export the macro information if requested. */ |
9f10757c TW |
1143 | if (info) |
1144 | *info = macro; | |
1145 | ||
252b5132 RH |
1146 | return 1; |
1147 | } | |
1148 | ||
1149 | /* Delete a macro. */ | |
1150 | ||
1151 | void | |
1152 | delete_macro (name) | |
1153 | const char *name; | |
1154 | { | |
1155 | hash_delete (macro_hash, name); | |
1156 | } | |
1157 | ||
1158 | /* Handle the MRI IRP and IRPC pseudo-ops. These are handled as a | |
1159 | combined macro definition and execution. This returns NULL on | |
1160 | success, or an error message otherwise. */ | |
1161 | ||
1162 | const char * | |
1163 | expand_irp (irpc, idx, in, out, get_line, comment_char) | |
1164 | int irpc; | |
1165 | int idx; | |
1166 | sb *in; | |
1167 | sb *out; | |
1168 | int (*get_line) PARAMS ((sb *)); | |
1169 | int comment_char; | |
1170 | { | |
1171 | const char *mn; | |
1172 | sb sub; | |
1173 | formal_entry f; | |
1174 | struct hash_control *h; | |
1175 | const char *err; | |
1176 | ||
1177 | if (irpc) | |
1178 | mn = "IRPC"; | |
1179 | else | |
1180 | mn = "IRP"; | |
1181 | ||
1182 | idx = sb_skip_white (idx, in); | |
1183 | ||
1184 | sb_new (&sub); | |
1185 | if (! buffer_and_nest (mn, "ENDR", &sub, get_line)) | |
1186 | return _("unexpected end of file in irp or irpc"); | |
29f8404c | 1187 | |
252b5132 RH |
1188 | sb_new (&f.name); |
1189 | sb_new (&f.def); | |
1190 | sb_new (&f.actual); | |
1191 | ||
1192 | idx = get_token (idx, in, &f.name); | |
1193 | if (f.name.len == 0) | |
1194 | return _("missing model parameter"); | |
1195 | ||
1196 | h = hash_new (); | |
1197 | err = hash_jam (h, sb_terminate (&f.name), &f); | |
1198 | if (err != NULL) | |
1199 | return err; | |
1200 | ||
1201 | f.index = 1; | |
1202 | f.next = NULL; | |
1203 | ||
1204 | sb_reset (out); | |
1205 | ||
1206 | idx = sb_skip_comma (idx, in); | |
1207 | if (idx >= in->len || in->ptr[idx] == comment_char) | |
1208 | { | |
1209 | /* Expand once with a null string. */ | |
1210 | err = macro_expand_body (&sub, out, &f, h, comment_char, 0); | |
1211 | if (err != NULL) | |
1212 | return err; | |
1213 | } | |
1214 | else | |
1215 | { | |
1216 | if (irpc && in->ptr[idx] == '"') | |
1217 | ++idx; | |
1218 | while (idx < in->len && in->ptr[idx] != comment_char) | |
1219 | { | |
1220 | if (!irpc) | |
1221 | idx = get_any_string (idx, in, &f.actual, 1, 0); | |
1222 | else | |
1223 | { | |
1224 | if (in->ptr[idx] == '"') | |
1225 | { | |
1226 | int nxt; | |
1227 | ||
1228 | nxt = sb_skip_white (idx + 1, in); | |
1229 | if (nxt >= in->len || in->ptr[nxt] == comment_char) | |
1230 | { | |
1231 | idx = nxt; | |
1232 | break; | |
1233 | } | |
1234 | } | |
1235 | sb_reset (&f.actual); | |
1236 | sb_add_char (&f.actual, in->ptr[idx]); | |
1237 | ++idx; | |
1238 | } | |
1239 | err = macro_expand_body (&sub, out, &f, h, comment_char, 0); | |
1240 | if (err != NULL) | |
1241 | return err; | |
1242 | if (!irpc) | |
1243 | idx = sb_skip_comma (idx, in); | |
1244 | else | |
1245 | idx = sb_skip_white (idx, in); | |
1246 | } | |
1247 | } | |
1248 | ||
1249 | hash_die (h); | |
1250 | sb_kill (&sub); | |
1251 | ||
1252 | return NULL; | |
1253 | } |