Commit | Line | Data |
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fea17916 | 1 | /* macro.c - macro support for gas |
1c53c80d | 2 | Copyright 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003 |
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 | ||
fa6e9318 | 27 | #ifndef __GNUC__ |
252b5132 RH |
28 | # if HAVE_ALLOCA_H |
29 | # include <alloca.h> | |
30 | # else | |
31 | # ifdef _AIX | |
fa6e9318 AM |
32 | /* Indented so that pre-ansi C compilers will ignore it, rather than |
33 | choke on it. Some versions of AIX require this to be the first | |
34 | thing in the file. */ | |
252b5132 RH |
35 | #pragma alloca |
36 | # else | |
37 | # ifndef alloca /* predefined by HP cc +Olibcalls */ | |
38 | # if !defined (__STDC__) && !defined (__hpux) | |
39 | extern char *alloca (); | |
40 | # else | |
41 | extern void *alloca (); | |
42 | # endif /* __STDC__, __hpux */ | |
43 | # endif /* alloca */ | |
44 | # endif /* _AIX */ | |
45 | # endif /* HAVE_ALLOCA_H */ | |
fa6e9318 | 46 | #endif /* __GNUC__ */ |
252b5132 RH |
47 | |
48 | #include <stdio.h> | |
49 | #ifdef HAVE_STRING_H | |
50 | #include <string.h> | |
51 | #else | |
52 | #include <strings.h> | |
53 | #endif | |
252b5132 RH |
54 | #ifdef HAVE_STDLIB_H |
55 | #include <stdlib.h> | |
56 | #endif | |
57 | #include "libiberty.h" | |
3882b010 | 58 | #include "safe-ctype.h" |
252b5132 RH |
59 | #include "sb.h" |
60 | #include "hash.h" | |
61 | #include "macro.h" | |
62 | ||
63 | #include "asintl.h" | |
64 | ||
65 | /* The routines in this file handle macro definition and expansion. | |
fea17916 | 66 | They are called by gas. */ |
252b5132 | 67 | |
252b5132 RH |
68 | /* Internal functions. */ |
69 | ||
254d758c KH |
70 | static int get_token (int, sb *, sb *); |
71 | static int getstring (int, sb *, sb *); | |
72 | static int get_any_string (int, sb *, sb *, int, int); | |
73 | static int do_formals (macro_entry *, int, sb *); | |
74 | static int get_apost_token (int, sb *, sb *, int); | |
75 | static int sub_actual (int, sb *, sb *, struct hash_control *, int, sb *, int); | |
252b5132 | 76 | static const char *macro_expand_body |
254d758c KH |
77 | (sb *, sb *, formal_entry *, struct hash_control *, int); |
78 | static const char *macro_expand (int, sb *, macro_entry *, sb *); | |
252b5132 RH |
79 | |
80 | #define ISWHITE(x) ((x) == ' ' || (x) == '\t') | |
81 | ||
82 | #define ISSEP(x) \ | |
83 | ((x) == ' ' || (x) == '\t' || (x) == ',' || (x) == '"' || (x) == ';' \ | |
84 | || (x) == ')' || (x) == '(' \ | |
85 | || ((macro_alternate || macro_mri) && ((x) == '<' || (x) == '>'))) | |
86 | ||
87 | #define ISBASE(x) \ | |
88 | ((x) == 'b' || (x) == 'B' \ | |
89 | || (x) == 'q' || (x) == 'Q' \ | |
90 | || (x) == 'h' || (x) == 'H' \ | |
91 | || (x) == 'd' || (x) == 'D') | |
92 | ||
93 | /* The macro hash table. */ | |
94 | ||
1c53c80d | 95 | struct hash_control *macro_hash; |
252b5132 RH |
96 | |
97 | /* Whether any macros have been defined. */ | |
98 | ||
99 | int macro_defined; | |
100 | ||
fea17916 | 101 | /* Whether we are in alternate syntax mode. */ |
252b5132 RH |
102 | |
103 | static int macro_alternate; | |
104 | ||
105 | /* Whether we are in MRI mode. */ | |
106 | ||
107 | static int macro_mri; | |
108 | ||
109 | /* Whether we should strip '@' characters. */ | |
110 | ||
111 | static int macro_strip_at; | |
112 | ||
113 | /* Function to use to parse an expression. */ | |
114 | ||
254d758c | 115 | static int (*macro_expr) (const char *, int, sb *, int *); |
252b5132 RH |
116 | |
117 | /* Number of macro expansions that have been done. */ | |
118 | ||
119 | static int macro_number; | |
120 | ||
121 | /* Initialize macro processing. */ | |
122 | ||
123 | void | |
254d758c KH |
124 | macro_init (int alternate, int mri, int strip_at, |
125 | int (*expr) (const char *, int, sb *, int *)) | |
252b5132 RH |
126 | { |
127 | macro_hash = hash_new (); | |
128 | macro_defined = 0; | |
129 | macro_alternate = alternate; | |
130 | macro_mri = mri; | |
131 | macro_strip_at = strip_at; | |
132 | macro_expr = expr; | |
133 | } | |
134 | ||
135 | /* Switch in and out of MRI mode on the fly. */ | |
136 | ||
137 | void | |
254d758c | 138 | macro_mri_mode (int mri) |
252b5132 RH |
139 | { |
140 | macro_mri = mri; | |
141 | } | |
142 | ||
143 | /* Read input lines till we get to a TO string. | |
144 | Increase nesting depth if we get a FROM string. | |
145 | Put the results into sb at PTR. | |
146 | Add a new input line to an sb using GET_LINE. | |
147 | Return 1 on success, 0 on unexpected EOF. */ | |
148 | ||
149 | int | |
254d758c KH |
150 | buffer_and_nest (const char *from, const char *to, sb *ptr, |
151 | int (*get_line) (sb *)) | |
252b5132 RH |
152 | { |
153 | int from_len = strlen (from); | |
154 | int to_len = strlen (to); | |
155 | int depth = 1; | |
156 | int line_start = ptr->len; | |
157 | ||
158 | int more = get_line (ptr); | |
159 | ||
160 | while (more) | |
161 | { | |
29f8404c | 162 | /* Try and find the first pseudo op on the line. */ |
252b5132 RH |
163 | int i = line_start; |
164 | ||
165 | if (! macro_alternate && ! macro_mri) | |
166 | { | |
167 | /* With normal syntax we can suck what we want till we get | |
168 | to the dot. With the alternate, labels have to start in | |
169 | the first column, since we cant tell what's a label and | |
29f8404c | 170 | whats a pseudoop. */ |
252b5132 | 171 | |
29f8404c | 172 | /* Skip leading whitespace. */ |
252b5132 RH |
173 | while (i < ptr->len && ISWHITE (ptr->ptr[i])) |
174 | i++; | |
175 | ||
29f8404c | 176 | /* Skip over a label. */ |
252b5132 | 177 | while (i < ptr->len |
3882b010 | 178 | && (ISALNUM (ptr->ptr[i]) |
252b5132 RH |
179 | || ptr->ptr[i] == '_' |
180 | || ptr->ptr[i] == '$')) | |
181 | i++; | |
182 | ||
29f8404c | 183 | /* And a colon. */ |
252b5132 RH |
184 | if (i < ptr->len |
185 | && ptr->ptr[i] == ':') | |
186 | i++; | |
187 | ||
188 | } | |
29f8404c | 189 | /* Skip trailing whitespace. */ |
252b5132 RH |
190 | while (i < ptr->len && ISWHITE (ptr->ptr[i])) |
191 | i++; | |
192 | ||
193 | if (i < ptr->len && (ptr->ptr[i] == '.' | |
194 | || macro_alternate | |
195 | || macro_mri)) | |
196 | { | |
197 | if (ptr->ptr[i] == '.') | |
29f8404c | 198 | i++; |
c1eae114 | 199 | if (strncasecmp (ptr->ptr + i, from, from_len) == 0 |
29f8404c | 200 | && (ptr->len == (i + from_len) |
3882b010 | 201 | || ! ISALNUM (ptr->ptr[i + from_len]))) |
252b5132 | 202 | depth++; |
c1eae114 | 203 | if (strncasecmp (ptr->ptr + i, to, to_len) == 0 |
29f8404c | 204 | && (ptr->len == (i + to_len) |
3882b010 | 205 | || ! ISALNUM (ptr->ptr[i + to_len]))) |
252b5132 RH |
206 | { |
207 | depth--; | |
208 | if (depth == 0) | |
209 | { | |
29f8404c | 210 | /* Reset the string to not include the ending rune. */ |
252b5132 RH |
211 | ptr->len = line_start; |
212 | break; | |
213 | } | |
214 | } | |
215 | } | |
216 | ||
0822d075 NC |
217 | /* Add the original end-of-line char to the end and keep running. */ |
218 | sb_add_char (ptr, more); | |
252b5132 RH |
219 | line_start = ptr->len; |
220 | more = get_line (ptr); | |
221 | } | |
222 | ||
223 | /* Return 1 on success, 0 on unexpected EOF. */ | |
224 | return depth == 0; | |
225 | } | |
226 | ||
227 | /* Pick up a token. */ | |
228 | ||
229 | static int | |
254d758c | 230 | get_token (int idx, sb *in, sb *name) |
252b5132 RH |
231 | { |
232 | if (idx < in->len | |
3882b010 | 233 | && (ISALPHA (in->ptr[idx]) |
252b5132 RH |
234 | || in->ptr[idx] == '_' |
235 | || in->ptr[idx] == '$')) | |
236 | { | |
237 | sb_add_char (name, in->ptr[idx++]); | |
238 | while (idx < in->len | |
3882b010 | 239 | && (ISALNUM (in->ptr[idx]) |
252b5132 RH |
240 | || in->ptr[idx] == '_' |
241 | || in->ptr[idx] == '$')) | |
242 | { | |
243 | sb_add_char (name, in->ptr[idx++]); | |
244 | } | |
245 | } | |
29f8404c | 246 | /* Ignore trailing &. */ |
252b5132 RH |
247 | if (macro_alternate && idx < in->len && in->ptr[idx] == '&') |
248 | idx++; | |
249 | return idx; | |
250 | } | |
251 | ||
252 | /* Pick up a string. */ | |
253 | ||
254 | static int | |
254d758c | 255 | getstring (int idx, sb *in, sb *acc) |
252b5132 RH |
256 | { |
257 | idx = sb_skip_white (idx, in); | |
258 | ||
259 | while (idx < in->len | |
29f8404c | 260 | && (in->ptr[idx] == '"' |
252b5132 RH |
261 | || (in->ptr[idx] == '<' && (macro_alternate || macro_mri)) |
262 | || (in->ptr[idx] == '\'' && macro_alternate))) | |
263 | { | |
264 | if (in->ptr[idx] == '<') | |
265 | { | |
266 | int nest = 0; | |
267 | idx++; | |
268 | while ((in->ptr[idx] != '>' || nest) | |
269 | && idx < in->len) | |
270 | { | |
271 | if (in->ptr[idx] == '!') | |
272 | { | |
29f8404c | 273 | idx++; |
252b5132 RH |
274 | sb_add_char (acc, in->ptr[idx++]); |
275 | } | |
276 | else | |
277 | { | |
278 | if (in->ptr[idx] == '>') | |
279 | nest--; | |
280 | if (in->ptr[idx] == '<') | |
281 | nest++; | |
282 | sb_add_char (acc, in->ptr[idx++]); | |
283 | } | |
284 | } | |
285 | idx++; | |
286 | } | |
287 | else if (in->ptr[idx] == '"' || in->ptr[idx] == '\'') | |
288 | { | |
289 | char tchar = in->ptr[idx]; | |
c06ae4f2 | 290 | int escaped = 0; |
29f8404c | 291 | |
252b5132 | 292 | idx++; |
29f8404c | 293 | |
252b5132 RH |
294 | while (idx < in->len) |
295 | { | |
29f8404c | 296 | if (in->ptr[idx - 1] == '\\') |
c06ae4f2 UC |
297 | escaped ^= 1; |
298 | else | |
299 | escaped = 0; | |
300 | ||
252b5132 RH |
301 | if (macro_alternate && in->ptr[idx] == '!') |
302 | { | |
e972090a | 303 | idx ++; |
29f8404c | 304 | |
1994a7c7 NC |
305 | sb_add_char (acc, in->ptr[idx]); |
306 | ||
e972090a | 307 | idx ++; |
252b5132 | 308 | } |
c06ae4f2 UC |
309 | else if (escaped && in->ptr[idx] == tchar) |
310 | { | |
311 | sb_add_char (acc, tchar); | |
e972090a | 312 | idx ++; |
c06ae4f2 | 313 | } |
252b5132 RH |
314 | else |
315 | { | |
316 | if (in->ptr[idx] == tchar) | |
317 | { | |
e972090a | 318 | idx ++; |
29f8404c | 319 | |
252b5132 RH |
320 | if (idx >= in->len || in->ptr[idx] != tchar) |
321 | break; | |
322 | } | |
29f8404c | 323 | |
252b5132 | 324 | sb_add_char (acc, in->ptr[idx]); |
e972090a | 325 | idx ++; |
252b5132 RH |
326 | } |
327 | } | |
328 | } | |
329 | } | |
29f8404c | 330 | |
252b5132 RH |
331 | return idx; |
332 | } | |
333 | ||
334 | /* Fetch string from the input stream, | |
335 | rules: | |
336 | 'Bxyx<whitespace> -> return 'Bxyza | |
337 | %<char> -> return string of decimal value of x | |
338 | "<string>" -> return string | |
339 | xyx<whitespace> -> return xyz | |
340 | */ | |
341 | ||
342 | static int | |
254d758c | 343 | get_any_string (int idx, sb *in, sb *out, int expand, int pretend_quoted) |
252b5132 RH |
344 | { |
345 | sb_reset (out); | |
346 | idx = sb_skip_white (idx, in); | |
347 | ||
348 | if (idx < in->len) | |
349 | { | |
9df59bba | 350 | if (in->len > idx + 2 && in->ptr[idx + 1] == '\'' && ISBASE (in->ptr[idx])) |
252b5132 RH |
351 | { |
352 | while (!ISSEP (in->ptr[idx])) | |
353 | sb_add_char (out, in->ptr[idx++]); | |
354 | } | |
355 | else if (in->ptr[idx] == '%' | |
356 | && macro_alternate | |
357 | && expand) | |
358 | { | |
359 | int val; | |
360 | char buf[20]; | |
29f8404c | 361 | /* Turns the next expression into a string. */ |
06f030db | 362 | /* xgettext: no-c-format */ |
252b5132 RH |
363 | idx = (*macro_expr) (_("% operator needs absolute expression"), |
364 | idx + 1, | |
365 | in, | |
366 | &val); | |
d1a6c242 | 367 | sprintf (buf, "%d", val); |
252b5132 RH |
368 | sb_add_string (out, buf); |
369 | } | |
370 | else if (in->ptr[idx] == '"' | |
371 | || (in->ptr[idx] == '<' && (macro_alternate || macro_mri)) | |
372 | || (macro_alternate && in->ptr[idx] == '\'')) | |
373 | { | |
374 | if (macro_alternate | |
375 | && ! macro_strip_at | |
376 | && expand) | |
377 | { | |
29f8404c KH |
378 | /* Keep the quotes. */ |
379 | sb_add_char (out, '\"'); | |
252b5132 RH |
380 | |
381 | idx = getstring (idx, in, out); | |
29f8404c | 382 | sb_add_char (out, '\"'); |
252b5132 RH |
383 | } |
384 | else | |
385 | { | |
386 | idx = getstring (idx, in, out); | |
387 | } | |
388 | } | |
29f8404c | 389 | else |
252b5132 | 390 | { |
29f8404c | 391 | while (idx < in->len |
252b5132 RH |
392 | && (in->ptr[idx] == '"' |
393 | || in->ptr[idx] == '\'' | |
29f8404c | 394 | || pretend_quoted |
252b5132 RH |
395 | || (in->ptr[idx] != ' ' |
396 | && in->ptr[idx] != '\t' | |
397 | && in->ptr[idx] != ',' | |
398 | && (in->ptr[idx] != '<' | |
399 | || (! macro_alternate && ! macro_mri))))) | |
400 | { | |
29f8404c | 401 | if (in->ptr[idx] == '"' |
252b5132 RH |
402 | || in->ptr[idx] == '\'') |
403 | { | |
404 | char tchar = in->ptr[idx]; | |
405 | sb_add_char (out, in->ptr[idx++]); | |
406 | while (idx < in->len | |
407 | && in->ptr[idx] != tchar) | |
29f8404c | 408 | sb_add_char (out, in->ptr[idx++]); |
252b5132 | 409 | if (idx == in->len) |
29f8404c | 410 | return idx; |
252b5132 RH |
411 | } |
412 | sb_add_char (out, in->ptr[idx++]); | |
413 | } | |
414 | } | |
415 | } | |
416 | ||
417 | return idx; | |
418 | } | |
419 | ||
420 | /* Pick up the formal parameters of a macro definition. */ | |
421 | ||
422 | static int | |
254d758c | 423 | do_formals (macro_entry *macro, int idx, sb *in) |
252b5132 RH |
424 | { |
425 | formal_entry **p = ¯o->formals; | |
426 | ||
427 | macro->formal_count = 0; | |
428 | macro->formal_hash = hash_new (); | |
429 | while (idx < in->len) | |
430 | { | |
431 | formal_entry *formal; | |
432 | ||
433 | formal = (formal_entry *) xmalloc (sizeof (formal_entry)); | |
434 | ||
435 | sb_new (&formal->name); | |
436 | sb_new (&formal->def); | |
437 | sb_new (&formal->actual); | |
438 | ||
439 | idx = sb_skip_white (idx, in); | |
440 | idx = get_token (idx, in, &formal->name); | |
441 | if (formal->name.len == 0) | |
442 | break; | |
443 | idx = sb_skip_white (idx, in); | |
444 | if (formal->name.len) | |
445 | { | |
29f8404c | 446 | /* This is a formal. */ |
252b5132 RH |
447 | if (idx < in->len && in->ptr[idx] == '=') |
448 | { | |
29f8404c | 449 | /* Got a default. */ |
252b5132 RH |
450 | idx = get_any_string (idx + 1, in, &formal->def, 1, 0); |
451 | } | |
452 | } | |
453 | ||
29f8404c | 454 | /* Add to macro's hash table. */ |
252b5132 RH |
455 | hash_jam (macro->formal_hash, sb_terminate (&formal->name), formal); |
456 | ||
457 | formal->index = macro->formal_count; | |
458 | idx = sb_skip_comma (idx, in); | |
459 | macro->formal_count++; | |
460 | *p = formal; | |
461 | p = &formal->next; | |
462 | *p = NULL; | |
463 | } | |
464 | ||
465 | if (macro_mri) | |
466 | { | |
467 | formal_entry *formal; | |
468 | const char *name; | |
469 | ||
470 | /* Add a special NARG formal, which macro_expand will set to the | |
471 | number of arguments. */ | |
472 | formal = (formal_entry *) xmalloc (sizeof (formal_entry)); | |
473 | ||
474 | sb_new (&formal->name); | |
475 | sb_new (&formal->def); | |
476 | sb_new (&formal->actual); | |
477 | ||
478 | /* The same MRI assemblers which treat '@' characters also use | |
479 | the name $NARG. At least until we find an exception. */ | |
480 | if (macro_strip_at) | |
481 | name = "$NARG"; | |
482 | else | |
483 | name = "NARG"; | |
484 | ||
485 | sb_add_string (&formal->name, name); | |
486 | ||
29f8404c | 487 | /* Add to macro's hash table. */ |
252b5132 RH |
488 | hash_jam (macro->formal_hash, name, formal); |
489 | ||
490 | formal->index = NARG_INDEX; | |
491 | *p = formal; | |
492 | formal->next = NULL; | |
493 | } | |
494 | ||
495 | return idx; | |
496 | } | |
497 | ||
498 | /* Define a new macro. Returns NULL on success, otherwise returns an | |
499 | error message. If NAMEP is not NULL, *NAMEP is set to the name of | |
500 | the macro which was defined. */ | |
501 | ||
502 | const char * | |
254d758c KH |
503 | define_macro (int idx, sb *in, sb *label, |
504 | int (*get_line) (sb *), const char **namep) | |
252b5132 RH |
505 | { |
506 | macro_entry *macro; | |
507 | sb name; | |
508 | const char *namestr; | |
509 | ||
510 | macro = (macro_entry *) xmalloc (sizeof (macro_entry)); | |
511 | sb_new (¯o->sub); | |
512 | sb_new (&name); | |
513 | ||
514 | macro->formal_count = 0; | |
515 | macro->formals = 0; | |
516 | ||
517 | idx = sb_skip_white (idx, in); | |
518 | if (! buffer_and_nest ("MACRO", "ENDM", ¯o->sub, get_line)) | |
519 | return _("unexpected end of file in macro definition"); | |
520 | if (label != NULL && label->len != 0) | |
521 | { | |
522 | sb_add_sb (&name, label); | |
523 | if (idx < in->len && in->ptr[idx] == '(') | |
524 | { | |
29f8404c | 525 | /* It's the label: MACRO (formals,...) sort */ |
252b5132 RH |
526 | idx = do_formals (macro, idx + 1, in); |
527 | if (in->ptr[idx] != ')') | |
528 | return _("missing ) after formals"); | |
529 | } | |
530 | else | |
531 | { | |
29f8404c | 532 | /* It's the label: MACRO formals,... sort */ |
252b5132 RH |
533 | idx = do_formals (macro, idx, in); |
534 | } | |
535 | } | |
536 | else | |
537 | { | |
538 | idx = get_token (idx, in, &name); | |
539 | idx = sb_skip_comma (idx, in); | |
540 | idx = do_formals (macro, idx, in); | |
541 | } | |
542 | ||
29f8404c | 543 | /* And stick it in the macro hash table. */ |
252b5132 | 544 | for (idx = 0; idx < name.len; idx++) |
3882b010 | 545 | name.ptr[idx] = TOLOWER (name.ptr[idx]); |
252b5132 RH |
546 | namestr = sb_terminate (&name); |
547 | hash_jam (macro_hash, namestr, (PTR) macro); | |
548 | ||
549 | macro_defined = 1; | |
550 | ||
551 | if (namep != NULL) | |
552 | *namep = namestr; | |
553 | ||
554 | return NULL; | |
555 | } | |
556 | ||
557 | /* Scan a token, and then skip KIND. */ | |
558 | ||
559 | static int | |
254d758c | 560 | get_apost_token (int idx, sb *in, sb *name, int kind) |
252b5132 RH |
561 | { |
562 | idx = get_token (idx, in, name); | |
563 | if (idx < in->len | |
564 | && in->ptr[idx] == kind | |
565 | && (! macro_mri || macro_strip_at) | |
566 | && (! macro_strip_at || kind == '@')) | |
567 | idx++; | |
568 | return idx; | |
569 | } | |
570 | ||
571 | /* Substitute the actual value for a formal parameter. */ | |
572 | ||
573 | static int | |
254d758c KH |
574 | sub_actual (int start, sb *in, sb *t, struct hash_control *formal_hash, |
575 | int kind, sb *out, int copyifnotthere) | |
252b5132 RH |
576 | { |
577 | int src; | |
578 | formal_entry *ptr; | |
579 | ||
580 | src = get_apost_token (start, in, t, kind); | |
581 | /* See if it's in the macro's hash table, unless this is | |
582 | macro_strip_at and kind is '@' and the token did not end in '@'. */ | |
583 | if (macro_strip_at | |
584 | && kind == '@' | |
585 | && (src == start || in->ptr[src - 1] != '@')) | |
586 | ptr = NULL; | |
587 | else | |
588 | ptr = (formal_entry *) hash_find (formal_hash, sb_terminate (t)); | |
589 | if (ptr) | |
590 | { | |
591 | if (ptr->actual.len) | |
592 | { | |
593 | sb_add_sb (out, &ptr->actual); | |
594 | } | |
595 | else | |
596 | { | |
597 | sb_add_sb (out, &ptr->def); | |
598 | } | |
599 | } | |
600 | else if (kind == '&') | |
601 | { | |
602 | /* Doing this permits people to use & in macro bodies. */ | |
603 | sb_add_char (out, '&'); | |
c1ed1235 | 604 | sb_add_sb (out, t); |
252b5132 RH |
605 | } |
606 | else if (copyifnotthere) | |
607 | { | |
608 | sb_add_sb (out, t); | |
609 | } | |
29f8404c | 610 | else |
252b5132 RH |
611 | { |
612 | sb_add_char (out, '\\'); | |
613 | sb_add_sb (out, t); | |
614 | } | |
615 | return src; | |
616 | } | |
617 | ||
618 | /* Expand the body of a macro. */ | |
619 | ||
620 | static const char * | |
254d758c KH |
621 | macro_expand_body (sb *in, sb *out, formal_entry *formals, |
622 | struct hash_control *formal_hash, int locals) | |
252b5132 RH |
623 | { |
624 | sb t; | |
625 | int src = 0; | |
626 | int inquote = 0; | |
627 | formal_entry *loclist = NULL; | |
628 | ||
629 | sb_new (&t); | |
630 | ||
631 | while (src < in->len) | |
632 | { | |
633 | if (in->ptr[src] == '&') | |
634 | { | |
635 | sb_reset (&t); | |
636 | if (macro_mri) | |
637 | { | |
638 | if (src + 1 < in->len && in->ptr[src + 1] == '&') | |
639 | src = sub_actual (src + 2, in, &t, formal_hash, '\'', out, 1); | |
640 | else | |
641 | sb_add_char (out, in->ptr[src++]); | |
642 | } | |
643 | else | |
644 | { | |
645 | /* FIXME: Why do we do this? */ | |
646 | src = sub_actual (src + 1, in, &t, formal_hash, '&', out, 0); | |
647 | } | |
648 | } | |
649 | else if (in->ptr[src] == '\\') | |
650 | { | |
651 | src++; | |
fea17916 | 652 | if (in->ptr[src] == '(') |
252b5132 | 653 | { |
29f8404c | 654 | /* Sub in till the next ')' literally. */ |
252b5132 RH |
655 | src++; |
656 | while (src < in->len && in->ptr[src] != ')') | |
657 | { | |
658 | sb_add_char (out, in->ptr[src++]); | |
659 | } | |
660 | if (in->ptr[src] == ')') | |
661 | src++; | |
662 | else | |
663 | return _("missplaced )"); | |
664 | } | |
665 | else if (in->ptr[src] == '@') | |
666 | { | |
29f8404c | 667 | /* Sub in the macro invocation number. */ |
252b5132 RH |
668 | |
669 | char buffer[10]; | |
670 | src++; | |
a2984248 | 671 | sprintf (buffer, "%d", macro_number); |
252b5132 RH |
672 | sb_add_string (out, buffer); |
673 | } | |
674 | else if (in->ptr[src] == '&') | |
675 | { | |
676 | /* This is a preprocessor variable name, we don't do them | |
29f8404c | 677 | here. */ |
252b5132 RH |
678 | sb_add_char (out, '\\'); |
679 | sb_add_char (out, '&'); | |
680 | src++; | |
681 | } | |
3882b010 | 682 | else if (macro_mri && ISALNUM (in->ptr[src])) |
252b5132 RH |
683 | { |
684 | int ind; | |
685 | formal_entry *f; | |
686 | ||
3882b010 | 687 | if (ISDIGIT (in->ptr[src])) |
252b5132 | 688 | ind = in->ptr[src] - '0'; |
3882b010 | 689 | else if (ISUPPER (in->ptr[src])) |
252b5132 RH |
690 | ind = in->ptr[src] - 'A' + 10; |
691 | else | |
692 | ind = in->ptr[src] - 'a' + 10; | |
693 | ++src; | |
694 | for (f = formals; f != NULL; f = f->next) | |
695 | { | |
696 | if (f->index == ind - 1) | |
697 | { | |
698 | if (f->actual.len != 0) | |
699 | sb_add_sb (out, &f->actual); | |
700 | else | |
701 | sb_add_sb (out, &f->def); | |
702 | break; | |
703 | } | |
704 | } | |
705 | } | |
706 | else | |
707 | { | |
708 | sb_reset (&t); | |
709 | src = sub_actual (src, in, &t, formal_hash, '\'', out, 0); | |
710 | } | |
711 | } | |
712 | else if ((macro_alternate || macro_mri) | |
3882b010 | 713 | && (ISALPHA (in->ptr[src]) |
252b5132 RH |
714 | || in->ptr[src] == '_' |
715 | || in->ptr[src] == '$') | |
716 | && (! inquote | |
717 | || ! macro_strip_at | |
718 | || (src > 0 && in->ptr[src - 1] == '@'))) | |
719 | { | |
720 | if (! locals | |
721 | || src + 5 >= in->len | |
722 | || strncasecmp (in->ptr + src, "LOCAL", 5) != 0 | |
723 | || ! ISWHITE (in->ptr[src + 5])) | |
724 | { | |
725 | sb_reset (&t); | |
726 | src = sub_actual (src, in, &t, formal_hash, | |
727 | (macro_strip_at && inquote) ? '@' : '\'', | |
728 | out, 1); | |
729 | } | |
730 | else | |
731 | { | |
732 | formal_entry *f; | |
733 | ||
734 | src = sb_skip_white (src + 5, in); | |
fea17916 | 735 | while (in->ptr[src] != '\n') |
252b5132 RH |
736 | { |
737 | static int loccnt; | |
738 | char buf[20]; | |
739 | const char *err; | |
740 | ||
741 | f = (formal_entry *) xmalloc (sizeof (formal_entry)); | |
742 | sb_new (&f->name); | |
743 | sb_new (&f->def); | |
744 | sb_new (&f->actual); | |
745 | f->index = LOCAL_INDEX; | |
746 | f->next = loclist; | |
747 | loclist = f; | |
748 | ||
749 | src = get_token (src, in, &f->name); | |
750 | ++loccnt; | |
751 | sprintf (buf, "LL%04x", loccnt); | |
752 | sb_add_string (&f->actual, buf); | |
753 | ||
754 | err = hash_jam (formal_hash, sb_terminate (&f->name), f); | |
755 | if (err != NULL) | |
756 | return err; | |
757 | ||
758 | src = sb_skip_comma (src, in); | |
759 | } | |
760 | } | |
761 | } | |
252b5132 RH |
762 | else if (in->ptr[src] == '"' |
763 | || (macro_mri && in->ptr[src] == '\'')) | |
764 | { | |
765 | inquote = !inquote; | |
766 | sb_add_char (out, in->ptr[src++]); | |
767 | } | |
768 | else if (in->ptr[src] == '@' && macro_strip_at) | |
769 | { | |
770 | ++src; | |
771 | if (src < in->len | |
772 | && in->ptr[src] == '@') | |
773 | { | |
774 | sb_add_char (out, '@'); | |
775 | ++src; | |
776 | } | |
777 | } | |
778 | else if (macro_mri | |
779 | && in->ptr[src] == '=' | |
780 | && src + 1 < in->len | |
781 | && in->ptr[src + 1] == '=') | |
782 | { | |
783 | formal_entry *ptr; | |
784 | ||
785 | sb_reset (&t); | |
786 | src = get_token (src + 2, in, &t); | |
787 | ptr = (formal_entry *) hash_find (formal_hash, sb_terminate (&t)); | |
788 | if (ptr == NULL) | |
789 | { | |
790 | /* FIXME: We should really return a warning string here, | |
791 | but we can't, because the == might be in the MRI | |
792 | comment field, and, since the nature of the MRI | |
793 | comment field depends upon the exact instruction | |
794 | being used, we don't have enough information here to | |
795 | figure out whether it is or not. Instead, we leave | |
796 | the == in place, which should cause a syntax error if | |
797 | it is not in a comment. */ | |
798 | sb_add_char (out, '='); | |
799 | sb_add_char (out, '='); | |
800 | sb_add_sb (out, &t); | |
801 | } | |
802 | else | |
803 | { | |
804 | if (ptr->actual.len) | |
805 | { | |
806 | sb_add_string (out, "-1"); | |
807 | } | |
808 | else | |
809 | { | |
810 | sb_add_char (out, '0'); | |
811 | } | |
812 | } | |
813 | } | |
814 | else | |
815 | { | |
816 | sb_add_char (out, in->ptr[src++]); | |
817 | } | |
818 | } | |
819 | ||
820 | sb_kill (&t); | |
821 | ||
822 | while (loclist != NULL) | |
823 | { | |
824 | formal_entry *f; | |
825 | ||
826 | f = loclist->next; | |
1af6dcd2 ILT |
827 | /* Setting the value to NULL effectively deletes the entry. We |
828 | avoid calling hash_delete because it doesn't reclaim memory. */ | |
829 | hash_jam (formal_hash, sb_terminate (&loclist->name), NULL); | |
252b5132 RH |
830 | sb_kill (&loclist->name); |
831 | sb_kill (&loclist->def); | |
832 | sb_kill (&loclist->actual); | |
833 | free (loclist); | |
834 | loclist = f; | |
835 | } | |
836 | ||
837 | return NULL; | |
838 | } | |
839 | ||
840 | /* Assign values to the formal parameters of a macro, and expand the | |
841 | body. */ | |
842 | ||
843 | static const char * | |
254d758c | 844 | macro_expand (int idx, sb *in, macro_entry *m, sb *out) |
252b5132 RH |
845 | { |
846 | sb t; | |
847 | formal_entry *ptr; | |
848 | formal_entry *f; | |
849 | int is_positional = 0; | |
850 | int is_keyword = 0; | |
851 | int narg = 0; | |
852 | const char *err; | |
853 | ||
854 | sb_new (&t); | |
29f8404c KH |
855 | |
856 | /* Reset any old value the actuals may have. */ | |
252b5132 | 857 | for (f = m->formals; f; f = f->next) |
29f8404c | 858 | sb_reset (&f->actual); |
252b5132 RH |
859 | f = m->formals; |
860 | while (f != NULL && f->index < 0) | |
861 | f = f->next; | |
862 | ||
863 | if (macro_mri) | |
864 | { | |
865 | /* The macro may be called with an optional qualifier, which may | |
866 | be referred to in the macro body as \0. */ | |
867 | if (idx < in->len && in->ptr[idx] == '.') | |
d1a6c242 KH |
868 | { |
869 | /* The Microtec assembler ignores this if followed by a white space. | |
870 | (Macro invocation with empty extension) */ | |
871 | idx++; | |
872 | if ( idx < in->len | |
873 | && in->ptr[idx] != ' ' | |
874 | && in->ptr[idx] != '\t') | |
875 | { | |
876 | formal_entry *n; | |
877 | ||
878 | n = (formal_entry *) xmalloc (sizeof (formal_entry)); | |
879 | sb_new (&n->name); | |
880 | sb_new (&n->def); | |
881 | sb_new (&n->actual); | |
882 | n->index = QUAL_INDEX; | |
883 | ||
884 | n->next = m->formals; | |
885 | m->formals = n; | |
886 | ||
887 | idx = get_any_string (idx, in, &n->actual, 1, 0); | |
888 | } | |
889 | } | |
890 | } | |
252b5132 | 891 | |
29f8404c | 892 | /* Peel off the actuals and store them away in the hash tables' actuals. */ |
252b5132 | 893 | idx = sb_skip_white (idx, in); |
fea17916 | 894 | while (idx < in->len) |
252b5132 RH |
895 | { |
896 | int scan; | |
897 | ||
29f8404c | 898 | /* Look and see if it's a positional or keyword arg. */ |
252b5132 RH |
899 | scan = idx; |
900 | while (scan < in->len | |
901 | && !ISSEP (in->ptr[scan]) | |
902 | && !(macro_mri && in->ptr[scan] == '\'') | |
903 | && (!macro_alternate && in->ptr[scan] != '=')) | |
904 | scan++; | |
905 | if (scan < in->len && !macro_alternate && in->ptr[scan] == '=') | |
906 | { | |
907 | is_keyword = 1; | |
908 | ||
909 | /* It's OK to go from positional to keyword. */ | |
910 | ||
911 | /* This is a keyword arg, fetch the formal name and | |
29f8404c | 912 | then the actual stuff. */ |
252b5132 RH |
913 | sb_reset (&t); |
914 | idx = get_token (idx, in, &t); | |
915 | if (in->ptr[idx] != '=') | |
916 | return _("confusion in formal parameters"); | |
917 | ||
29f8404c | 918 | /* Lookup the formal in the macro's list. */ |
252b5132 RH |
919 | ptr = (formal_entry *) hash_find (m->formal_hash, sb_terminate (&t)); |
920 | if (!ptr) | |
921 | return _("macro formal argument does not exist"); | |
922 | else | |
923 | { | |
29f8404c | 924 | /* Insert this value into the right place. */ |
252b5132 RH |
925 | sb_reset (&ptr->actual); |
926 | idx = get_any_string (idx + 1, in, &ptr->actual, 0, 0); | |
927 | if (ptr->actual.len > 0) | |
928 | ++narg; | |
929 | } | |
930 | } | |
931 | else | |
932 | { | |
29f8404c | 933 | /* This is a positional arg. */ |
252b5132 RH |
934 | is_positional = 1; |
935 | if (is_keyword) | |
936 | return _("can't mix positional and keyword arguments"); | |
937 | ||
938 | if (!f) | |
939 | { | |
940 | formal_entry **pf; | |
941 | int c; | |
942 | ||
943 | if (!macro_mri) | |
944 | return _("too many positional arguments"); | |
945 | ||
946 | f = (formal_entry *) xmalloc (sizeof (formal_entry)); | |
947 | sb_new (&f->name); | |
948 | sb_new (&f->def); | |
949 | sb_new (&f->actual); | |
950 | f->next = NULL; | |
951 | ||
952 | c = -1; | |
953 | for (pf = &m->formals; *pf != NULL; pf = &(*pf)->next) | |
954 | if ((*pf)->index >= c) | |
955 | c = (*pf)->index + 1; | |
956 | if (c == -1) | |
957 | c = 0; | |
958 | *pf = f; | |
959 | f->index = c; | |
960 | } | |
961 | ||
962 | sb_reset (&f->actual); | |
963 | idx = get_any_string (idx, in, &f->actual, 1, 0); | |
964 | if (f->actual.len > 0) | |
965 | ++narg; | |
966 | do | |
967 | { | |
968 | f = f->next; | |
969 | } | |
970 | while (f != NULL && f->index < 0); | |
971 | } | |
972 | ||
973 | if (! macro_mri) | |
974 | idx = sb_skip_comma (idx, in); | |
975 | else | |
976 | { | |
977 | if (in->ptr[idx] == ',') | |
978 | ++idx; | |
979 | if (ISWHITE (in->ptr[idx])) | |
980 | break; | |
981 | } | |
982 | } | |
983 | ||
984 | if (macro_mri) | |
985 | { | |
986 | char buffer[20]; | |
987 | ||
988 | sb_reset (&t); | |
989 | sb_add_string (&t, macro_strip_at ? "$NARG" : "NARG"); | |
990 | ptr = (formal_entry *) hash_find (m->formal_hash, sb_terminate (&t)); | |
991 | sb_reset (&ptr->actual); | |
992 | sprintf (buffer, "%d", narg); | |
993 | sb_add_string (&ptr->actual, buffer); | |
994 | } | |
995 | ||
fea17916 | 996 | err = macro_expand_body (&m->sub, out, m->formals, m->formal_hash, 1); |
252b5132 RH |
997 | if (err != NULL) |
998 | return err; | |
999 | ||
1000 | /* Discard any unnamed formal arguments. */ | |
1001 | if (macro_mri) | |
1002 | { | |
1003 | formal_entry **pf; | |
1004 | ||
1005 | pf = &m->formals; | |
1006 | while (*pf != NULL) | |
1007 | { | |
1008 | if ((*pf)->name.len != 0) | |
1009 | pf = &(*pf)->next; | |
1010 | else | |
1011 | { | |
1012 | sb_kill (&(*pf)->name); | |
1013 | sb_kill (&(*pf)->def); | |
1014 | sb_kill (&(*pf)->actual); | |
1015 | f = (*pf)->next; | |
1016 | free (*pf); | |
1017 | *pf = f; | |
1018 | } | |
1019 | } | |
1020 | } | |
1021 | ||
1022 | sb_kill (&t); | |
1023 | macro_number++; | |
1024 | ||
1025 | return NULL; | |
1026 | } | |
1027 | ||
1028 | /* Check for a macro. If one is found, put the expansion into | |
fea17916 | 1029 | *EXPAND. Return 1 if a macro is found, 0 otherwise. */ |
252b5132 RH |
1030 | |
1031 | int | |
254d758c KH |
1032 | check_macro (const char *line, sb *expand, |
1033 | const char **error, macro_entry **info) | |
252b5132 RH |
1034 | { |
1035 | const char *s; | |
1036 | char *copy, *cs; | |
1037 | macro_entry *macro; | |
1038 | sb line_sb; | |
1039 | ||
3882b010 | 1040 | if (! ISALPHA (*line) |
252b5132 RH |
1041 | && *line != '_' |
1042 | && *line != '$' | |
1043 | && (! macro_mri || *line != '.')) | |
1044 | return 0; | |
1045 | ||
1046 | s = line + 1; | |
3882b010 | 1047 | while (ISALNUM (*s) |
252b5132 RH |
1048 | || *s == '_' |
1049 | || *s == '$') | |
1050 | ++s; | |
1051 | ||
1052 | copy = (char *) alloca (s - line + 1); | |
1053 | memcpy (copy, line, s - line); | |
1054 | copy[s - line] = '\0'; | |
1055 | for (cs = copy; *cs != '\0'; cs++) | |
3882b010 | 1056 | *cs = TOLOWER (*cs); |
252b5132 RH |
1057 | |
1058 | macro = (macro_entry *) hash_find (macro_hash, copy); | |
1059 | ||
1060 | if (macro == NULL) | |
1061 | return 0; | |
1062 | ||
1063 | /* Wrap the line up in an sb. */ | |
1064 | sb_new (&line_sb); | |
1065 | while (*s != '\0' && *s != '\n' && *s != '\r') | |
1066 | sb_add_char (&line_sb, *s++); | |
1067 | ||
1068 | sb_new (expand); | |
fea17916 | 1069 | *error = macro_expand (0, &line_sb, macro, expand); |
252b5132 RH |
1070 | |
1071 | sb_kill (&line_sb); | |
1072 | ||
29f8404c | 1073 | /* Export the macro information if requested. */ |
9f10757c TW |
1074 | if (info) |
1075 | *info = macro; | |
1076 | ||
252b5132 RH |
1077 | return 1; |
1078 | } | |
1079 | ||
1080 | /* Delete a macro. */ | |
1081 | ||
1082 | void | |
254d758c | 1083 | delete_macro (const char *name) |
252b5132 RH |
1084 | { |
1085 | hash_delete (macro_hash, name); | |
1086 | } | |
1087 | ||
1088 | /* Handle the MRI IRP and IRPC pseudo-ops. These are handled as a | |
1089 | combined macro definition and execution. This returns NULL on | |
1090 | success, or an error message otherwise. */ | |
1091 | ||
1092 | const char * | |
254d758c | 1093 | expand_irp (int irpc, int idx, sb *in, sb *out, int (*get_line) (sb *)) |
252b5132 RH |
1094 | { |
1095 | const char *mn; | |
1096 | sb sub; | |
1097 | formal_entry f; | |
1098 | struct hash_control *h; | |
1099 | const char *err; | |
1100 | ||
1101 | if (irpc) | |
1102 | mn = "IRPC"; | |
1103 | else | |
1104 | mn = "IRP"; | |
1105 | ||
1106 | idx = sb_skip_white (idx, in); | |
1107 | ||
1108 | sb_new (&sub); | |
1109 | if (! buffer_and_nest (mn, "ENDR", &sub, get_line)) | |
1110 | return _("unexpected end of file in irp or irpc"); | |
29f8404c | 1111 | |
252b5132 RH |
1112 | sb_new (&f.name); |
1113 | sb_new (&f.def); | |
1114 | sb_new (&f.actual); | |
1115 | ||
1116 | idx = get_token (idx, in, &f.name); | |
1117 | if (f.name.len == 0) | |
1118 | return _("missing model parameter"); | |
1119 | ||
1120 | h = hash_new (); | |
1121 | err = hash_jam (h, sb_terminate (&f.name), &f); | |
1122 | if (err != NULL) | |
1123 | return err; | |
1124 | ||
1125 | f.index = 1; | |
1126 | f.next = NULL; | |
1127 | ||
1128 | sb_reset (out); | |
1129 | ||
1130 | idx = sb_skip_comma (idx, in); | |
fea17916 | 1131 | if (idx >= in->len) |
252b5132 RH |
1132 | { |
1133 | /* Expand once with a null string. */ | |
fea17916 | 1134 | err = macro_expand_body (&sub, out, &f, h, 0); |
252b5132 RH |
1135 | if (err != NULL) |
1136 | return err; | |
1137 | } | |
1138 | else | |
1139 | { | |
1140 | if (irpc && in->ptr[idx] == '"') | |
1141 | ++idx; | |
fea17916 | 1142 | while (idx < in->len) |
252b5132 RH |
1143 | { |
1144 | if (!irpc) | |
1145 | idx = get_any_string (idx, in, &f.actual, 1, 0); | |
1146 | else | |
1147 | { | |
1148 | if (in->ptr[idx] == '"') | |
1149 | { | |
1150 | int nxt; | |
1151 | ||
1152 | nxt = sb_skip_white (idx + 1, in); | |
fea17916 | 1153 | if (nxt >= in->len) |
252b5132 RH |
1154 | { |
1155 | idx = nxt; | |
1156 | break; | |
1157 | } | |
1158 | } | |
1159 | sb_reset (&f.actual); | |
1160 | sb_add_char (&f.actual, in->ptr[idx]); | |
1161 | ++idx; | |
1162 | } | |
fea17916 | 1163 | err = macro_expand_body (&sub, out, &f, h, 0); |
252b5132 RH |
1164 | if (err != NULL) |
1165 | return err; | |
1166 | if (!irpc) | |
1167 | idx = sb_skip_comma (idx, in); | |
1168 | else | |
1169 | idx = sb_skip_white (idx, in); | |
1170 | } | |
1171 | } | |
1172 | ||
1173 | hash_die (h); | |
1174 | sb_kill (&sub); | |
1175 | ||
1176 | return NULL; | |
1177 | } |