Commit | Line | Data |
---|---|---|
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 | ||
73 | /* Structures used to store macros. | |
74 | ||
75 | Each macro knows its name and included text. It gets built with a | |
76 | list of formal arguments, and also keeps a hash table which points | |
77 | into the list to speed up formal search. Each formal knows its | |
78 | name and its default value. Each time the macro is expanded, the | |
79 | formals get the actual values attatched to them. */ | |
80 | ||
81 | /* describe the formal arguments to a macro */ | |
82 | ||
83 | typedef struct formal_struct | |
84 | { | |
85 | struct formal_struct *next; /* next formal in list */ | |
86 | sb name; /* name of the formal */ | |
87 | sb def; /* the default value */ | |
88 | sb actual; /* the actual argument (changed on each expansion) */ | |
89 | int index; /* the index of the formal 0..formal_count-1 */ | |
90 | } | |
91 | formal_entry; | |
92 | ||
93 | /* Other values found in the index field of a formal_entry. */ | |
94 | #define QUAL_INDEX (-1) | |
95 | #define NARG_INDEX (-2) | |
96 | #define LOCAL_INDEX (-3) | |
97 | ||
98 | /* describe the macro. */ | |
99 | ||
100 | typedef struct macro_struct | |
101 | { | |
102 | sb sub; /* substitution text. */ | |
103 | int formal_count; /* number of formal args. */ | |
104 | formal_entry *formals; /* pointer to list of formal_structs */ | |
105 | struct hash_control *formal_hash; /* hash table of formals. */ | |
106 | } | |
107 | macro_entry; | |
108 | ||
109 | /* Internal functions. */ | |
110 | ||
111 | static int get_token PARAMS ((int, sb *, sb *)); | |
112 | static int getstring PARAMS ((int, sb *, sb *)); | |
113 | static int get_any_string PARAMS ((int, sb *, sb *, int, int)); | |
114 | static int do_formals PARAMS ((macro_entry *, int, sb *)); | |
115 | static int get_apost_token PARAMS ((int, sb *, sb *, int)); | |
116 | static int sub_actual | |
117 | PARAMS ((int, sb *, sb *, struct hash_control *, int, sb *, int)); | |
118 | static const char *macro_expand_body | |
119 | PARAMS ((sb *, sb *, formal_entry *, struct hash_control *, int, int)); | |
120 | static const char *macro_expand PARAMS ((int, sb *, macro_entry *, sb *, int)); | |
121 | ||
122 | #define ISWHITE(x) ((x) == ' ' || (x) == '\t') | |
123 | ||
124 | #define ISSEP(x) \ | |
125 | ((x) == ' ' || (x) == '\t' || (x) == ',' || (x) == '"' || (x) == ';' \ | |
126 | || (x) == ')' || (x) == '(' \ | |
127 | || ((macro_alternate || macro_mri) && ((x) == '<' || (x) == '>'))) | |
128 | ||
129 | #define ISBASE(x) \ | |
130 | ((x) == 'b' || (x) == 'B' \ | |
131 | || (x) == 'q' || (x) == 'Q' \ | |
132 | || (x) == 'h' || (x) == 'H' \ | |
133 | || (x) == 'd' || (x) == 'D') | |
134 | ||
135 | /* The macro hash table. */ | |
136 | ||
137 | static struct hash_control *macro_hash; | |
138 | ||
139 | /* Whether any macros have been defined. */ | |
140 | ||
141 | int macro_defined; | |
142 | ||
143 | /* Whether we are in GASP alternate mode. */ | |
144 | ||
145 | static int macro_alternate; | |
146 | ||
147 | /* Whether we are in MRI mode. */ | |
148 | ||
149 | static int macro_mri; | |
150 | ||
151 | /* Whether we should strip '@' characters. */ | |
152 | ||
153 | static int macro_strip_at; | |
154 | ||
155 | /* Function to use to parse an expression. */ | |
156 | ||
157 | static int (*macro_expr) PARAMS ((const char *, int, sb *, int *)); | |
158 | ||
159 | /* Number of macro expansions that have been done. */ | |
160 | ||
161 | static int macro_number; | |
162 | ||
163 | /* Initialize macro processing. */ | |
164 | ||
165 | void | |
166 | macro_init (alternate, mri, strip_at, expr) | |
167 | int alternate; | |
168 | int mri; | |
169 | int strip_at; | |
170 | int (*expr) PARAMS ((const char *, int, sb *, int *)); | |
171 | { | |
172 | macro_hash = hash_new (); | |
173 | macro_defined = 0; | |
174 | macro_alternate = alternate; | |
175 | macro_mri = mri; | |
176 | macro_strip_at = strip_at; | |
177 | macro_expr = expr; | |
178 | } | |
179 | ||
180 | /* Switch in and out of MRI mode on the fly. */ | |
181 | ||
182 | void | |
183 | macro_mri_mode (mri) | |
184 | int mri; | |
185 | { | |
186 | macro_mri = mri; | |
187 | } | |
188 | ||
189 | /* Read input lines till we get to a TO string. | |
190 | Increase nesting depth if we get a FROM string. | |
191 | Put the results into sb at PTR. | |
192 | Add a new input line to an sb using GET_LINE. | |
193 | Return 1 on success, 0 on unexpected EOF. */ | |
194 | ||
195 | int | |
196 | buffer_and_nest (from, to, ptr, get_line) | |
197 | const char *from; | |
198 | const char *to; | |
199 | sb *ptr; | |
200 | int (*get_line) PARAMS ((sb *)); | |
201 | { | |
202 | int from_len = strlen (from); | |
203 | int to_len = strlen (to); | |
204 | int depth = 1; | |
205 | int line_start = ptr->len; | |
206 | ||
207 | int more = get_line (ptr); | |
208 | ||
209 | while (more) | |
210 | { | |
211 | /* Try and find the first pseudo op on the line */ | |
212 | int i = line_start; | |
213 | ||
214 | if (! macro_alternate && ! macro_mri) | |
215 | { | |
216 | /* With normal syntax we can suck what we want till we get | |
217 | to the dot. With the alternate, labels have to start in | |
218 | the first column, since we cant tell what's a label and | |
219 | whats a pseudoop */ | |
220 | ||
221 | /* Skip leading whitespace */ | |
222 | while (i < ptr->len && ISWHITE (ptr->ptr[i])) | |
223 | i++; | |
224 | ||
225 | /* Skip over a label */ | |
226 | while (i < ptr->len | |
227 | && (isalnum ((unsigned char) ptr->ptr[i]) | |
228 | || ptr->ptr[i] == '_' | |
229 | || ptr->ptr[i] == '$')) | |
230 | i++; | |
231 | ||
232 | /* And a colon */ | |
233 | if (i < ptr->len | |
234 | && ptr->ptr[i] == ':') | |
235 | i++; | |
236 | ||
237 | } | |
238 | /* Skip trailing whitespace */ | |
239 | while (i < ptr->len && ISWHITE (ptr->ptr[i])) | |
240 | i++; | |
241 | ||
242 | if (i < ptr->len && (ptr->ptr[i] == '.' | |
243 | || macro_alternate | |
244 | || macro_mri)) | |
245 | { | |
246 | if (ptr->ptr[i] == '.') | |
247 | i++; | |
248 | if (strncasecmp (ptr->ptr + i, from, from_len) == 0) | |
249 | depth++; | |
250 | if (strncasecmp (ptr->ptr + i, to, to_len) == 0) | |
251 | { | |
252 | depth--; | |
253 | if (depth == 0) | |
254 | { | |
255 | /* Reset the string to not include the ending rune */ | |
256 | ptr->len = line_start; | |
257 | break; | |
258 | } | |
259 | } | |
260 | } | |
261 | ||
262 | /* Add a CR to the end and keep running */ | |
263 | sb_add_char (ptr, '\n'); | |
264 | line_start = ptr->len; | |
265 | more = get_line (ptr); | |
266 | } | |
267 | ||
268 | /* Return 1 on success, 0 on unexpected EOF. */ | |
269 | return depth == 0; | |
270 | } | |
271 | ||
272 | /* Pick up a token. */ | |
273 | ||
274 | static int | |
275 | get_token (idx, in, name) | |
276 | int idx; | |
277 | sb *in; | |
278 | sb *name; | |
279 | { | |
280 | if (idx < in->len | |
281 | && (isalpha ((unsigned char) in->ptr[idx]) | |
282 | || in->ptr[idx] == '_' | |
283 | || in->ptr[idx] == '$')) | |
284 | { | |
285 | sb_add_char (name, in->ptr[idx++]); | |
286 | while (idx < in->len | |
287 | && (isalnum ((unsigned char) in->ptr[idx]) | |
288 | || in->ptr[idx] == '_' | |
289 | || in->ptr[idx] == '$')) | |
290 | { | |
291 | sb_add_char (name, in->ptr[idx++]); | |
292 | } | |
293 | } | |
294 | /* Ignore trailing & */ | |
295 | if (macro_alternate && idx < in->len && in->ptr[idx] == '&') | |
296 | idx++; | |
297 | return idx; | |
298 | } | |
299 | ||
300 | /* Pick up a string. */ | |
301 | ||
302 | static int | |
303 | getstring (idx, in, acc) | |
304 | int idx; | |
305 | sb *in; | |
306 | sb *acc; | |
307 | { | |
308 | idx = sb_skip_white (idx, in); | |
309 | ||
310 | while (idx < in->len | |
311 | && (in->ptr[idx] == '"' | |
312 | || (in->ptr[idx] == '<' && (macro_alternate || macro_mri)) | |
313 | || (in->ptr[idx] == '\'' && macro_alternate))) | |
314 | { | |
315 | if (in->ptr[idx] == '<') | |
316 | { | |
317 | int nest = 0; | |
318 | idx++; | |
319 | while ((in->ptr[idx] != '>' || nest) | |
320 | && idx < in->len) | |
321 | { | |
322 | if (in->ptr[idx] == '!') | |
323 | { | |
324 | idx++ ; | |
325 | sb_add_char (acc, in->ptr[idx++]); | |
326 | } | |
327 | else | |
328 | { | |
329 | if (in->ptr[idx] == '>') | |
330 | nest--; | |
331 | if (in->ptr[idx] == '<') | |
332 | nest++; | |
333 | sb_add_char (acc, in->ptr[idx++]); | |
334 | } | |
335 | } | |
336 | idx++; | |
337 | } | |
338 | else if (in->ptr[idx] == '"' || in->ptr[idx] == '\'') | |
339 | { | |
340 | char tchar = in->ptr[idx]; | |
341 | idx++; | |
342 | while (idx < in->len) | |
343 | { | |
344 | if (macro_alternate && in->ptr[idx] == '!') | |
345 | { | |
346 | idx++ ; | |
347 | sb_add_char (acc, in->ptr[idx++]); | |
348 | } | |
349 | else | |
350 | { | |
351 | if (in->ptr[idx] == tchar) | |
352 | { | |
353 | idx++; | |
354 | if (idx >= in->len || in->ptr[idx] != tchar) | |
355 | break; | |
356 | } | |
357 | sb_add_char (acc, in->ptr[idx]); | |
358 | idx++; | |
359 | } | |
360 | } | |
361 | } | |
362 | } | |
363 | ||
364 | return idx; | |
365 | } | |
366 | ||
367 | /* Fetch string from the input stream, | |
368 | rules: | |
369 | 'Bxyx<whitespace> -> return 'Bxyza | |
370 | %<char> -> return string of decimal value of x | |
371 | "<string>" -> return string | |
372 | xyx<whitespace> -> return xyz | |
373 | */ | |
374 | ||
375 | static int | |
376 | get_any_string (idx, in, out, expand, pretend_quoted) | |
377 | int idx; | |
378 | sb *in; | |
379 | sb *out; | |
380 | int expand; | |
381 | int pretend_quoted; | |
382 | { | |
383 | sb_reset (out); | |
384 | idx = sb_skip_white (idx, in); | |
385 | ||
386 | if (idx < in->len) | |
387 | { | |
388 | if (in->len > 2 && in->ptr[idx+1] == '\'' && ISBASE (in->ptr[idx])) | |
389 | { | |
390 | while (!ISSEP (in->ptr[idx])) | |
391 | sb_add_char (out, in->ptr[idx++]); | |
392 | } | |
393 | else if (in->ptr[idx] == '%' | |
394 | && macro_alternate | |
395 | && expand) | |
396 | { | |
397 | int val; | |
398 | char buf[20]; | |
399 | /* Turns the next expression into a string */ | |
400 | idx = (*macro_expr) (_("% operator needs absolute expression"), | |
401 | idx + 1, | |
402 | in, | |
403 | &val); | |
404 | sprintf(buf, "%d", val); | |
405 | sb_add_string (out, buf); | |
406 | } | |
407 | else if (in->ptr[idx] == '"' | |
408 | || (in->ptr[idx] == '<' && (macro_alternate || macro_mri)) | |
409 | || (macro_alternate && in->ptr[idx] == '\'')) | |
410 | { | |
411 | if (macro_alternate | |
412 | && ! macro_strip_at | |
413 | && expand) | |
414 | { | |
415 | /* Keep the quotes */ | |
416 | sb_add_char (out, '\"'); | |
417 | ||
418 | idx = getstring (idx, in, out); | |
419 | sb_add_char (out, '\"'); | |
420 | } | |
421 | else | |
422 | { | |
423 | idx = getstring (idx, in, out); | |
424 | } | |
425 | } | |
426 | else | |
427 | { | |
428 | while (idx < in->len | |
429 | && (in->ptr[idx] == '"' | |
430 | || in->ptr[idx] == '\'' | |
431 | || pretend_quoted | |
432 | || (in->ptr[idx] != ' ' | |
433 | && in->ptr[idx] != '\t' | |
434 | && in->ptr[idx] != ',' | |
435 | && (in->ptr[idx] != '<' | |
436 | || (! macro_alternate && ! macro_mri))))) | |
437 | { | |
438 | if (in->ptr[idx] == '"' | |
439 | || in->ptr[idx] == '\'') | |
440 | { | |
441 | char tchar = in->ptr[idx]; | |
442 | sb_add_char (out, in->ptr[idx++]); | |
443 | while (idx < in->len | |
444 | && in->ptr[idx] != tchar) | |
445 | sb_add_char (out, in->ptr[idx++]); | |
446 | if (idx == in->len) | |
447 | return idx; | |
448 | } | |
449 | sb_add_char (out, in->ptr[idx++]); | |
450 | } | |
451 | } | |
452 | } | |
453 | ||
454 | return idx; | |
455 | } | |
456 | ||
457 | /* Pick up the formal parameters of a macro definition. */ | |
458 | ||
459 | static int | |
460 | do_formals (macro, idx, in) | |
461 | macro_entry *macro; | |
462 | int idx; | |
463 | sb *in; | |
464 | { | |
465 | formal_entry **p = ¯o->formals; | |
466 | ||
467 | macro->formal_count = 0; | |
468 | macro->formal_hash = hash_new (); | |
469 | while (idx < in->len) | |
470 | { | |
471 | formal_entry *formal; | |
472 | ||
473 | formal = (formal_entry *) xmalloc (sizeof (formal_entry)); | |
474 | ||
475 | sb_new (&formal->name); | |
476 | sb_new (&formal->def); | |
477 | sb_new (&formal->actual); | |
478 | ||
479 | idx = sb_skip_white (idx, in); | |
480 | idx = get_token (idx, in, &formal->name); | |
481 | if (formal->name.len == 0) | |
482 | break; | |
483 | idx = sb_skip_white (idx, in); | |
484 | if (formal->name.len) | |
485 | { | |
486 | /* This is a formal */ | |
487 | if (idx < in->len && in->ptr[idx] == '=') | |
488 | { | |
489 | /* Got a default */ | |
490 | idx = get_any_string (idx + 1, in, &formal->def, 1, 0); | |
491 | } | |
492 | } | |
493 | ||
494 | /* Add to macro's hash table */ | |
495 | hash_jam (macro->formal_hash, sb_terminate (&formal->name), formal); | |
496 | ||
497 | formal->index = macro->formal_count; | |
498 | idx = sb_skip_comma (idx, in); | |
499 | macro->formal_count++; | |
500 | *p = formal; | |
501 | p = &formal->next; | |
502 | *p = NULL; | |
503 | } | |
504 | ||
505 | if (macro_mri) | |
506 | { | |
507 | formal_entry *formal; | |
508 | const char *name; | |
509 | ||
510 | /* Add a special NARG formal, which macro_expand will set to the | |
511 | number of arguments. */ | |
512 | formal = (formal_entry *) xmalloc (sizeof (formal_entry)); | |
513 | ||
514 | sb_new (&formal->name); | |
515 | sb_new (&formal->def); | |
516 | sb_new (&formal->actual); | |
517 | ||
518 | /* The same MRI assemblers which treat '@' characters also use | |
519 | the name $NARG. At least until we find an exception. */ | |
520 | if (macro_strip_at) | |
521 | name = "$NARG"; | |
522 | else | |
523 | name = "NARG"; | |
524 | ||
525 | sb_add_string (&formal->name, name); | |
526 | ||
527 | /* Add to macro's hash table */ | |
528 | hash_jam (macro->formal_hash, name, formal); | |
529 | ||
530 | formal->index = NARG_INDEX; | |
531 | *p = formal; | |
532 | formal->next = NULL; | |
533 | } | |
534 | ||
535 | return idx; | |
536 | } | |
537 | ||
538 | /* Define a new macro. Returns NULL on success, otherwise returns an | |
539 | error message. If NAMEP is not NULL, *NAMEP is set to the name of | |
540 | the macro which was defined. */ | |
541 | ||
542 | const char * | |
543 | define_macro (idx, in, label, get_line, namep) | |
544 | int idx; | |
545 | sb *in; | |
546 | sb *label; | |
547 | int (*get_line) PARAMS ((sb *)); | |
548 | const char **namep; | |
549 | { | |
550 | macro_entry *macro; | |
551 | sb name; | |
552 | const char *namestr; | |
553 | ||
554 | macro = (macro_entry *) xmalloc (sizeof (macro_entry)); | |
555 | sb_new (¯o->sub); | |
556 | sb_new (&name); | |
557 | ||
558 | macro->formal_count = 0; | |
559 | macro->formals = 0; | |
560 | ||
561 | idx = sb_skip_white (idx, in); | |
562 | if (! buffer_and_nest ("MACRO", "ENDM", ¯o->sub, get_line)) | |
563 | return _("unexpected end of file in macro definition"); | |
564 | if (label != NULL && label->len != 0) | |
565 | { | |
566 | sb_add_sb (&name, label); | |
567 | if (idx < in->len && in->ptr[idx] == '(') | |
568 | { | |
569 | /* It's the label: MACRO (formals,...) sort */ | |
570 | idx = do_formals (macro, idx + 1, in); | |
571 | if (in->ptr[idx] != ')') | |
572 | return _("missing ) after formals"); | |
573 | } | |
574 | else | |
575 | { | |
576 | /* It's the label: MACRO formals,... sort */ | |
577 | idx = do_formals (macro, idx, in); | |
578 | } | |
579 | } | |
580 | else | |
581 | { | |
582 | idx = get_token (idx, in, &name); | |
583 | idx = sb_skip_comma (idx, in); | |
584 | idx = do_formals (macro, idx, in); | |
585 | } | |
586 | ||
587 | /* and stick it in the macro hash table */ | |
588 | for (idx = 0; idx < name.len; idx++) | |
589 | if (isupper ((unsigned char) name.ptr[idx])) | |
590 | name.ptr[idx] = tolower (name.ptr[idx]); | |
591 | namestr = sb_terminate (&name); | |
592 | hash_jam (macro_hash, namestr, (PTR) macro); | |
593 | ||
594 | macro_defined = 1; | |
595 | ||
596 | if (namep != NULL) | |
597 | *namep = namestr; | |
598 | ||
599 | return NULL; | |
600 | } | |
601 | ||
602 | /* Scan a token, and then skip KIND. */ | |
603 | ||
604 | static int | |
605 | get_apost_token (idx, in, name, kind) | |
606 | int idx; | |
607 | sb *in; | |
608 | sb *name; | |
609 | int kind; | |
610 | { | |
611 | idx = get_token (idx, in, name); | |
612 | if (idx < in->len | |
613 | && in->ptr[idx] == kind | |
614 | && (! macro_mri || macro_strip_at) | |
615 | && (! macro_strip_at || kind == '@')) | |
616 | idx++; | |
617 | return idx; | |
618 | } | |
619 | ||
620 | /* Substitute the actual value for a formal parameter. */ | |
621 | ||
622 | static int | |
623 | sub_actual (start, in, t, formal_hash, kind, out, copyifnotthere) | |
624 | int start; | |
625 | sb *in; | |
626 | sb *t; | |
627 | struct hash_control *formal_hash; | |
628 | int kind; | |
629 | sb *out; | |
630 | int copyifnotthere; | |
631 | { | |
632 | int src; | |
633 | formal_entry *ptr; | |
634 | ||
635 | src = get_apost_token (start, in, t, kind); | |
636 | /* See if it's in the macro's hash table, unless this is | |
637 | macro_strip_at and kind is '@' and the token did not end in '@'. */ | |
638 | if (macro_strip_at | |
639 | && kind == '@' | |
640 | && (src == start || in->ptr[src - 1] != '@')) | |
641 | ptr = NULL; | |
642 | else | |
643 | ptr = (formal_entry *) hash_find (formal_hash, sb_terminate (t)); | |
644 | if (ptr) | |
645 | { | |
646 | if (ptr->actual.len) | |
647 | { | |
648 | sb_add_sb (out, &ptr->actual); | |
649 | } | |
650 | else | |
651 | { | |
652 | sb_add_sb (out, &ptr->def); | |
653 | } | |
654 | } | |
655 | else if (kind == '&') | |
656 | { | |
657 | /* Doing this permits people to use & in macro bodies. */ | |
658 | sb_add_char (out, '&'); | |
659 | } | |
660 | else if (copyifnotthere) | |
661 | { | |
662 | sb_add_sb (out, t); | |
663 | } | |
664 | else | |
665 | { | |
666 | sb_add_char (out, '\\'); | |
667 | sb_add_sb (out, t); | |
668 | } | |
669 | return src; | |
670 | } | |
671 | ||
672 | /* Expand the body of a macro. */ | |
673 | ||
674 | static const char * | |
675 | macro_expand_body (in, out, formals, formal_hash, comment_char, locals) | |
676 | sb *in; | |
677 | sb *out; | |
678 | formal_entry *formals; | |
679 | struct hash_control *formal_hash; | |
680 | int comment_char; | |
681 | int locals; | |
682 | { | |
683 | sb t; | |
684 | int src = 0; | |
685 | int inquote = 0; | |
686 | formal_entry *loclist = NULL; | |
687 | ||
688 | sb_new (&t); | |
689 | ||
690 | while (src < in->len) | |
691 | { | |
692 | if (in->ptr[src] == '&') | |
693 | { | |
694 | sb_reset (&t); | |
695 | if (macro_mri) | |
696 | { | |
697 | if (src + 1 < in->len && in->ptr[src + 1] == '&') | |
698 | src = sub_actual (src + 2, in, &t, formal_hash, '\'', out, 1); | |
699 | else | |
700 | sb_add_char (out, in->ptr[src++]); | |
701 | } | |
702 | else | |
703 | { | |
704 | /* FIXME: Why do we do this? */ | |
705 | src = sub_actual (src + 1, in, &t, formal_hash, '&', out, 0); | |
706 | } | |
707 | } | |
708 | else if (in->ptr[src] == '\\') | |
709 | { | |
710 | src++; | |
711 | if (in->ptr[src] == comment_char && comment_char != '\0') | |
712 | { | |
713 | /* This is a comment, just drop the rest of the line */ | |
714 | while (src < in->len | |
715 | && in->ptr[src] != '\n') | |
716 | src++; | |
717 | } | |
718 | else if (in->ptr[src] == '(') | |
719 | { | |
720 | /* Sub in till the next ')' literally */ | |
721 | src++; | |
722 | while (src < in->len && in->ptr[src] != ')') | |
723 | { | |
724 | sb_add_char (out, in->ptr[src++]); | |
725 | } | |
726 | if (in->ptr[src] == ')') | |
727 | src++; | |
728 | else | |
729 | return _("missplaced )"); | |
730 | } | |
731 | else if (in->ptr[src] == '@') | |
732 | { | |
733 | /* Sub in the macro invocation number */ | |
734 | ||
735 | char buffer[10]; | |
736 | src++; | |
737 | sprintf (buffer, "%05d", macro_number); | |
738 | sb_add_string (out, buffer); | |
739 | } | |
740 | else if (in->ptr[src] == '&') | |
741 | { | |
742 | /* This is a preprocessor variable name, we don't do them | |
743 | here */ | |
744 | sb_add_char (out, '\\'); | |
745 | sb_add_char (out, '&'); | |
746 | src++; | |
747 | } | |
748 | else if (macro_mri | |
749 | && isalnum ((unsigned char) in->ptr[src])) | |
750 | { | |
751 | int ind; | |
752 | formal_entry *f; | |
753 | ||
754 | if (isdigit ((unsigned char) in->ptr[src])) | |
755 | ind = in->ptr[src] - '0'; | |
756 | else if (isupper ((unsigned char) in->ptr[src])) | |
757 | ind = in->ptr[src] - 'A' + 10; | |
758 | else | |
759 | ind = in->ptr[src] - 'a' + 10; | |
760 | ++src; | |
761 | for (f = formals; f != NULL; f = f->next) | |
762 | { | |
763 | if (f->index == ind - 1) | |
764 | { | |
765 | if (f->actual.len != 0) | |
766 | sb_add_sb (out, &f->actual); | |
767 | else | |
768 | sb_add_sb (out, &f->def); | |
769 | break; | |
770 | } | |
771 | } | |
772 | } | |
773 | else | |
774 | { | |
775 | sb_reset (&t); | |
776 | src = sub_actual (src, in, &t, formal_hash, '\'', out, 0); | |
777 | } | |
778 | } | |
779 | else if ((macro_alternate || macro_mri) | |
780 | && (isalpha ((unsigned char) in->ptr[src]) | |
781 | || in->ptr[src] == '_' | |
782 | || in->ptr[src] == '$') | |
783 | && (! inquote | |
784 | || ! macro_strip_at | |
785 | || (src > 0 && in->ptr[src - 1] == '@'))) | |
786 | { | |
787 | if (! locals | |
788 | || src + 5 >= in->len | |
789 | || strncasecmp (in->ptr + src, "LOCAL", 5) != 0 | |
790 | || ! ISWHITE (in->ptr[src + 5])) | |
791 | { | |
792 | sb_reset (&t); | |
793 | src = sub_actual (src, in, &t, formal_hash, | |
794 | (macro_strip_at && inquote) ? '@' : '\'', | |
795 | out, 1); | |
796 | } | |
797 | else | |
798 | { | |
799 | formal_entry *f; | |
800 | ||
801 | src = sb_skip_white (src + 5, in); | |
802 | while (in->ptr[src] != '\n' && in->ptr[src] != comment_char) | |
803 | { | |
804 | static int loccnt; | |
805 | char buf[20]; | |
806 | const char *err; | |
807 | ||
808 | f = (formal_entry *) xmalloc (sizeof (formal_entry)); | |
809 | sb_new (&f->name); | |
810 | sb_new (&f->def); | |
811 | sb_new (&f->actual); | |
812 | f->index = LOCAL_INDEX; | |
813 | f->next = loclist; | |
814 | loclist = f; | |
815 | ||
816 | src = get_token (src, in, &f->name); | |
817 | ++loccnt; | |
818 | sprintf (buf, "LL%04x", loccnt); | |
819 | sb_add_string (&f->actual, buf); | |
820 | ||
821 | err = hash_jam (formal_hash, sb_terminate (&f->name), f); | |
822 | if (err != NULL) | |
823 | return err; | |
824 | ||
825 | src = sb_skip_comma (src, in); | |
826 | } | |
827 | } | |
828 | } | |
829 | else if (comment_char != '\0' | |
830 | && in->ptr[src] == comment_char | |
831 | && src + 1 < in->len | |
832 | && in->ptr[src + 1] == comment_char | |
833 | && !inquote) | |
834 | { | |
835 | /* Two comment chars in a row cause the rest of the line to | |
836 | be dropped. */ | |
837 | while (src < in->len && in->ptr[src] != '\n') | |
838 | src++; | |
839 | } | |
840 | else if (in->ptr[src] == '"' | |
841 | || (macro_mri && in->ptr[src] == '\'')) | |
842 | { | |
843 | inquote = !inquote; | |
844 | sb_add_char (out, in->ptr[src++]); | |
845 | } | |
846 | else if (in->ptr[src] == '@' && macro_strip_at) | |
847 | { | |
848 | ++src; | |
849 | if (src < in->len | |
850 | && in->ptr[src] == '@') | |
851 | { | |
852 | sb_add_char (out, '@'); | |
853 | ++src; | |
854 | } | |
855 | } | |
856 | else if (macro_mri | |
857 | && in->ptr[src] == '=' | |
858 | && src + 1 < in->len | |
859 | && in->ptr[src + 1] == '=') | |
860 | { | |
861 | formal_entry *ptr; | |
862 | ||
863 | sb_reset (&t); | |
864 | src = get_token (src + 2, in, &t); | |
865 | ptr = (formal_entry *) hash_find (formal_hash, sb_terminate (&t)); | |
866 | if (ptr == NULL) | |
867 | { | |
868 | /* FIXME: We should really return a warning string here, | |
869 | but we can't, because the == might be in the MRI | |
870 | comment field, and, since the nature of the MRI | |
871 | comment field depends upon the exact instruction | |
872 | being used, we don't have enough information here to | |
873 | figure out whether it is or not. Instead, we leave | |
874 | the == in place, which should cause a syntax error if | |
875 | it is not in a comment. */ | |
876 | sb_add_char (out, '='); | |
877 | sb_add_char (out, '='); | |
878 | sb_add_sb (out, &t); | |
879 | } | |
880 | else | |
881 | { | |
882 | if (ptr->actual.len) | |
883 | { | |
884 | sb_add_string (out, "-1"); | |
885 | } | |
886 | else | |
887 | { | |
888 | sb_add_char (out, '0'); | |
889 | } | |
890 | } | |
891 | } | |
892 | else | |
893 | { | |
894 | sb_add_char (out, in->ptr[src++]); | |
895 | } | |
896 | } | |
897 | ||
898 | sb_kill (&t); | |
899 | ||
900 | while (loclist != NULL) | |
901 | { | |
902 | formal_entry *f; | |
903 | ||
904 | f = loclist->next; | |
1af6dcd2 ILT |
905 | /* Setting the value to NULL effectively deletes the entry. We |
906 | avoid calling hash_delete because it doesn't reclaim memory. */ | |
907 | hash_jam (formal_hash, sb_terminate (&loclist->name), NULL); | |
252b5132 RH |
908 | sb_kill (&loclist->name); |
909 | sb_kill (&loclist->def); | |
910 | sb_kill (&loclist->actual); | |
911 | free (loclist); | |
912 | loclist = f; | |
913 | } | |
914 | ||
915 | return NULL; | |
916 | } | |
917 | ||
918 | /* Assign values to the formal parameters of a macro, and expand the | |
919 | body. */ | |
920 | ||
921 | static const char * | |
922 | macro_expand (idx, in, m, out, comment_char) | |
923 | int idx; | |
924 | sb *in; | |
925 | macro_entry *m; | |
926 | sb *out; | |
927 | int comment_char; | |
928 | { | |
929 | sb t; | |
930 | formal_entry *ptr; | |
931 | formal_entry *f; | |
932 | int is_positional = 0; | |
933 | int is_keyword = 0; | |
934 | int narg = 0; | |
935 | const char *err; | |
936 | ||
937 | sb_new (&t); | |
938 | ||
939 | /* Reset any old value the actuals may have */ | |
940 | for (f = m->formals; f; f = f->next) | |
941 | sb_reset (&f->actual); | |
942 | f = m->formals; | |
943 | while (f != NULL && f->index < 0) | |
944 | f = f->next; | |
945 | ||
946 | if (macro_mri) | |
947 | { | |
948 | /* The macro may be called with an optional qualifier, which may | |
949 | be referred to in the macro body as \0. */ | |
950 | if (idx < in->len && in->ptr[idx] == '.') | |
951 | { | |
952 | formal_entry *n; | |
953 | ||
954 | n = (formal_entry *) xmalloc (sizeof (formal_entry)); | |
955 | sb_new (&n->name); | |
956 | sb_new (&n->def); | |
957 | sb_new (&n->actual); | |
958 | n->index = QUAL_INDEX; | |
959 | ||
960 | n->next = m->formals; | |
961 | m->formals = n; | |
962 | ||
963 | idx = get_any_string (idx + 1, in, &n->actual, 1, 0); | |
964 | } | |
965 | } | |
966 | ||
967 | /* Peel off the actuals and store them away in the hash tables' actuals */ | |
968 | idx = sb_skip_white (idx, in); | |
969 | while (idx < in->len && in->ptr[idx] != comment_char) | |
970 | { | |
971 | int scan; | |
972 | ||
973 | /* Look and see if it's a positional or keyword arg */ | |
974 | scan = idx; | |
975 | while (scan < in->len | |
976 | && !ISSEP (in->ptr[scan]) | |
977 | && !(macro_mri && in->ptr[scan] == '\'') | |
978 | && (!macro_alternate && in->ptr[scan] != '=')) | |
979 | scan++; | |
980 | if (scan < in->len && !macro_alternate && in->ptr[scan] == '=') | |
981 | { | |
982 | is_keyword = 1; | |
983 | ||
984 | /* It's OK to go from positional to keyword. */ | |
985 | ||
986 | /* This is a keyword arg, fetch the formal name and | |
987 | then the actual stuff */ | |
988 | sb_reset (&t); | |
989 | idx = get_token (idx, in, &t); | |
990 | if (in->ptr[idx] != '=') | |
991 | return _("confusion in formal parameters"); | |
992 | ||
993 | /* Lookup the formal in the macro's list */ | |
994 | ptr = (formal_entry *) hash_find (m->formal_hash, sb_terminate (&t)); | |
995 | if (!ptr) | |
996 | return _("macro formal argument does not exist"); | |
997 | else | |
998 | { | |
999 | /* Insert this value into the right place */ | |
1000 | sb_reset (&ptr->actual); | |
1001 | idx = get_any_string (idx + 1, in, &ptr->actual, 0, 0); | |
1002 | if (ptr->actual.len > 0) | |
1003 | ++narg; | |
1004 | } | |
1005 | } | |
1006 | else | |
1007 | { | |
1008 | /* This is a positional arg */ | |
1009 | is_positional = 1; | |
1010 | if (is_keyword) | |
1011 | return _("can't mix positional and keyword arguments"); | |
1012 | ||
1013 | if (!f) | |
1014 | { | |
1015 | formal_entry **pf; | |
1016 | int c; | |
1017 | ||
1018 | if (!macro_mri) | |
1019 | return _("too many positional arguments"); | |
1020 | ||
1021 | f = (formal_entry *) xmalloc (sizeof (formal_entry)); | |
1022 | sb_new (&f->name); | |
1023 | sb_new (&f->def); | |
1024 | sb_new (&f->actual); | |
1025 | f->next = NULL; | |
1026 | ||
1027 | c = -1; | |
1028 | for (pf = &m->formals; *pf != NULL; pf = &(*pf)->next) | |
1029 | if ((*pf)->index >= c) | |
1030 | c = (*pf)->index + 1; | |
1031 | if (c == -1) | |
1032 | c = 0; | |
1033 | *pf = f; | |
1034 | f->index = c; | |
1035 | } | |
1036 | ||
1037 | sb_reset (&f->actual); | |
1038 | idx = get_any_string (idx, in, &f->actual, 1, 0); | |
1039 | if (f->actual.len > 0) | |
1040 | ++narg; | |
1041 | do | |
1042 | { | |
1043 | f = f->next; | |
1044 | } | |
1045 | while (f != NULL && f->index < 0); | |
1046 | } | |
1047 | ||
1048 | if (! macro_mri) | |
1049 | idx = sb_skip_comma (idx, in); | |
1050 | else | |
1051 | { | |
1052 | if (in->ptr[idx] == ',') | |
1053 | ++idx; | |
1054 | if (ISWHITE (in->ptr[idx])) | |
1055 | break; | |
1056 | } | |
1057 | } | |
1058 | ||
1059 | if (macro_mri) | |
1060 | { | |
1061 | char buffer[20]; | |
1062 | ||
1063 | sb_reset (&t); | |
1064 | sb_add_string (&t, macro_strip_at ? "$NARG" : "NARG"); | |
1065 | ptr = (formal_entry *) hash_find (m->formal_hash, sb_terminate (&t)); | |
1066 | sb_reset (&ptr->actual); | |
1067 | sprintf (buffer, "%d", narg); | |
1068 | sb_add_string (&ptr->actual, buffer); | |
1069 | } | |
1070 | ||
1071 | err = macro_expand_body (&m->sub, out, m->formals, m->formal_hash, | |
1072 | comment_char, 1); | |
1073 | if (err != NULL) | |
1074 | return err; | |
1075 | ||
1076 | /* Discard any unnamed formal arguments. */ | |
1077 | if (macro_mri) | |
1078 | { | |
1079 | formal_entry **pf; | |
1080 | ||
1081 | pf = &m->formals; | |
1082 | while (*pf != NULL) | |
1083 | { | |
1084 | if ((*pf)->name.len != 0) | |
1085 | pf = &(*pf)->next; | |
1086 | else | |
1087 | { | |
1088 | sb_kill (&(*pf)->name); | |
1089 | sb_kill (&(*pf)->def); | |
1090 | sb_kill (&(*pf)->actual); | |
1091 | f = (*pf)->next; | |
1092 | free (*pf); | |
1093 | *pf = f; | |
1094 | } | |
1095 | } | |
1096 | } | |
1097 | ||
1098 | sb_kill (&t); | |
1099 | macro_number++; | |
1100 | ||
1101 | return NULL; | |
1102 | } | |
1103 | ||
1104 | /* Check for a macro. If one is found, put the expansion into | |
1105 | *EXPAND. COMMENT_CHAR is the comment character--this is used by | |
1106 | gasp. Return 1 if a macro is found, 0 otherwise. */ | |
1107 | ||
1108 | int | |
1109 | check_macro (line, expand, comment_char, error) | |
1110 | const char *line; | |
1111 | sb *expand; | |
1112 | int comment_char; | |
1113 | const char **error; | |
1114 | { | |
1115 | const char *s; | |
1116 | char *copy, *cs; | |
1117 | macro_entry *macro; | |
1118 | sb line_sb; | |
1119 | ||
1120 | if (! isalpha ((unsigned char) *line) | |
1121 | && *line != '_' | |
1122 | && *line != '$' | |
1123 | && (! macro_mri || *line != '.')) | |
1124 | return 0; | |
1125 | ||
1126 | s = line + 1; | |
1127 | while (isalnum ((unsigned char) *s) | |
1128 | || *s == '_' | |
1129 | || *s == '$') | |
1130 | ++s; | |
1131 | ||
1132 | copy = (char *) alloca (s - line + 1); | |
1133 | memcpy (copy, line, s - line); | |
1134 | copy[s - line] = '\0'; | |
1135 | for (cs = copy; *cs != '\0'; cs++) | |
1136 | if (isupper ((unsigned char) *cs)) | |
1137 | *cs = tolower (*cs); | |
1138 | ||
1139 | macro = (macro_entry *) hash_find (macro_hash, copy); | |
1140 | ||
1141 | if (macro == NULL) | |
1142 | return 0; | |
1143 | ||
1144 | /* Wrap the line up in an sb. */ | |
1145 | sb_new (&line_sb); | |
1146 | while (*s != '\0' && *s != '\n' && *s != '\r') | |
1147 | sb_add_char (&line_sb, *s++); | |
1148 | ||
1149 | sb_new (expand); | |
1150 | *error = macro_expand (0, &line_sb, macro, expand, comment_char); | |
1151 | ||
1152 | sb_kill (&line_sb); | |
1153 | ||
1154 | return 1; | |
1155 | } | |
1156 | ||
1157 | /* Delete a macro. */ | |
1158 | ||
1159 | void | |
1160 | delete_macro (name) | |
1161 | const char *name; | |
1162 | { | |
1163 | hash_delete (macro_hash, name); | |
1164 | } | |
1165 | ||
1166 | /* Handle the MRI IRP and IRPC pseudo-ops. These are handled as a | |
1167 | combined macro definition and execution. This returns NULL on | |
1168 | success, or an error message otherwise. */ | |
1169 | ||
1170 | const char * | |
1171 | expand_irp (irpc, idx, in, out, get_line, comment_char) | |
1172 | int irpc; | |
1173 | int idx; | |
1174 | sb *in; | |
1175 | sb *out; | |
1176 | int (*get_line) PARAMS ((sb *)); | |
1177 | int comment_char; | |
1178 | { | |
1179 | const char *mn; | |
1180 | sb sub; | |
1181 | formal_entry f; | |
1182 | struct hash_control *h; | |
1183 | const char *err; | |
1184 | ||
1185 | if (irpc) | |
1186 | mn = "IRPC"; | |
1187 | else | |
1188 | mn = "IRP"; | |
1189 | ||
1190 | idx = sb_skip_white (idx, in); | |
1191 | ||
1192 | sb_new (&sub); | |
1193 | if (! buffer_and_nest (mn, "ENDR", &sub, get_line)) | |
1194 | return _("unexpected end of file in irp or irpc"); | |
1195 | ||
1196 | sb_new (&f.name); | |
1197 | sb_new (&f.def); | |
1198 | sb_new (&f.actual); | |
1199 | ||
1200 | idx = get_token (idx, in, &f.name); | |
1201 | if (f.name.len == 0) | |
1202 | return _("missing model parameter"); | |
1203 | ||
1204 | h = hash_new (); | |
1205 | err = hash_jam (h, sb_terminate (&f.name), &f); | |
1206 | if (err != NULL) | |
1207 | return err; | |
1208 | ||
1209 | f.index = 1; | |
1210 | f.next = NULL; | |
1211 | ||
1212 | sb_reset (out); | |
1213 | ||
1214 | idx = sb_skip_comma (idx, in); | |
1215 | if (idx >= in->len || in->ptr[idx] == comment_char) | |
1216 | { | |
1217 | /* Expand once with a null string. */ | |
1218 | err = macro_expand_body (&sub, out, &f, h, comment_char, 0); | |
1219 | if (err != NULL) | |
1220 | return err; | |
1221 | } | |
1222 | else | |
1223 | { | |
1224 | if (irpc && in->ptr[idx] == '"') | |
1225 | ++idx; | |
1226 | while (idx < in->len && in->ptr[idx] != comment_char) | |
1227 | { | |
1228 | if (!irpc) | |
1229 | idx = get_any_string (idx, in, &f.actual, 1, 0); | |
1230 | else | |
1231 | { | |
1232 | if (in->ptr[idx] == '"') | |
1233 | { | |
1234 | int nxt; | |
1235 | ||
1236 | nxt = sb_skip_white (idx + 1, in); | |
1237 | if (nxt >= in->len || in->ptr[nxt] == comment_char) | |
1238 | { | |
1239 | idx = nxt; | |
1240 | break; | |
1241 | } | |
1242 | } | |
1243 | sb_reset (&f.actual); | |
1244 | sb_add_char (&f.actual, in->ptr[idx]); | |
1245 | ++idx; | |
1246 | } | |
1247 | err = macro_expand_body (&sub, out, &f, h, comment_char, 0); | |
1248 | if (err != NULL) | |
1249 | return err; | |
1250 | if (!irpc) | |
1251 | idx = sb_skip_comma (idx, in); | |
1252 | else | |
1253 | idx = sb_skip_white (idx, in); | |
1254 | } | |
1255 | } | |
1256 | ||
1257 | hash_die (h); | |
1258 | sb_kill (&sub); | |
1259 | ||
1260 | return NULL; | |
1261 | } |