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e1929140 RR |
1 | /* ansi2knr.c */ |
2 | /* Convert ANSI C function definitions to K&R ("traditional C") syntax */ | |
3 | ||
4 | /* | |
5 | ansi2knr is distributed in the hope that it will be useful, but WITHOUT ANY | |
6 | WARRANTY. No author or distributor accepts responsibility to anyone for the | |
7 | consequences of using it or for whether it serves any particular purpose or | |
8 | works at all, unless he says so in writing. Refer to the GNU General Public | |
9 | License (the "GPL") for full details. | |
10 | ||
11 | Everyone is granted permission to copy, modify and redistribute ansi2knr, | |
12 | but only under the conditions described in the GPL. A copy of this license | |
13 | is supposed to have been given to you along with ansi2knr so you can know | |
14 | your rights and responsibilities. It should be in a file named COPYLEFT. | |
15 | [In the IJG distribution, the GPL appears below, not in a separate file.] | |
16 | Among other things, the copyright notice and this notice must be preserved | |
17 | on all copies. | |
18 | ||
19 | We explicitly state here what we believe is already implied by the GPL: if | |
20 | the ansi2knr program is distributed as a separate set of sources and a | |
21 | separate executable file which are aggregated on a storage medium together | |
22 | with another program, this in itself does not bring the other program under | |
23 | the GPL, nor does the mere fact that such a program or the procedures for | |
24 | constructing it invoke the ansi2knr executable bring any other part of the | |
25 | program under the GPL. | |
26 | */ | |
27 | ||
28 | /* | |
29 | ---------- Here is the GNU GPL file COPYLEFT, referred to above ---------- | |
30 | ----- These terms do NOT apply to the JPEG software itself; see README ------ | |
31 | ||
32 | GHOSTSCRIPT GENERAL PUBLIC LICENSE | |
33 | (Clarified 11 Feb 1988) | |
34 | ||
35 | Copyright (C) 1988 Richard M. Stallman | |
36 | Everyone is permitted to copy and distribute verbatim copies of this | |
37 | license, but changing it is not allowed. You can also use this wording | |
38 | to make the terms for other programs. | |
39 | ||
40 | The license agreements of most software companies keep you at the | |
41 | mercy of those companies. By contrast, our general public license is | |
42 | intended to give everyone the right to share Ghostscript. To make sure | |
43 | that you get the rights we want you to have, we need to make | |
44 | restrictions that forbid anyone to deny you these rights or to ask you | |
45 | to surrender the rights. Hence this license agreement. | |
46 | ||
47 | Specifically, we want to make sure that you have the right to give | |
48 | away copies of Ghostscript, that you receive source code or else can get | |
49 | it if you want it, that you can change Ghostscript or use pieces of it | |
50 | in new free programs, and that you know you can do these things. | |
51 | ||
52 | To make sure that everyone has such rights, we have to forbid you to | |
53 | deprive anyone else of these rights. For example, if you distribute | |
54 | copies of Ghostscript, you must give the recipients all the rights that | |
55 | you have. You must make sure that they, too, receive or can get the | |
56 | source code. And you must tell them their rights. | |
57 | ||
58 | Also, for our own protection, we must make certain that everyone finds | |
59 | out that there is no warranty for Ghostscript. If Ghostscript is | |
60 | modified by someone else and passed on, we want its recipients to know | |
61 | that what they have is not what we distributed, so that any problems | |
62 | introduced by others will not reflect on our reputation. | |
63 | ||
64 | Therefore we (Richard M. Stallman and the Free Software Foundation, | |
65 | Inc.) make the following terms which say what you must do to be allowed | |
66 | to distribute or change Ghostscript. | |
67 | ||
68 | ||
69 | COPYING POLICIES | |
70 | ||
71 | 1. You may copy and distribute verbatim copies of Ghostscript source | |
72 | code as you receive it, in any medium, provided that you conspicuously | |
73 | and appropriately publish on each copy a valid copyright and license | |
74 | notice "Copyright (C) 1989 Aladdin Enterprises. All rights reserved. | |
75 | Distributed by Free Software Foundation, Inc." (or with whatever year is | |
76 | appropriate); keep intact the notices on all files that refer to this | |
77 | License Agreement and to the absence of any warranty; and give any other | |
78 | recipients of the Ghostscript program a copy of this License Agreement | |
79 | along with the program. You may charge a distribution fee for the | |
80 | physical act of transferring a copy. | |
81 | ||
82 | 2. You may modify your copy or copies of Ghostscript or any portion of | |
83 | it, and copy and distribute such modifications under the terms of | |
84 | Paragraph 1 above, provided that you also do the following: | |
85 | ||
86 | a) cause the modified files to carry prominent notices stating | |
87 | that you changed the files and the date of any change; and | |
88 | ||
89 | b) cause the whole of any work that you distribute or publish, | |
90 | that in whole or in part contains or is a derivative of Ghostscript | |
91 | or any part thereof, to be licensed at no charge to all third | |
92 | parties on terms identical to those contained in this License | |
93 | Agreement (except that you may choose to grant more extensive | |
94 | warranty protection to some or all third parties, at your option). | |
95 | ||
96 | c) You may charge a distribution fee for the physical act of | |
97 | transferring a copy, and you may at your option offer warranty | |
98 | protection in exchange for a fee. | |
99 | ||
100 | Mere aggregation of another unrelated program with this program (or its | |
101 | derivative) on a volume of a storage or distribution medium does not bring | |
102 | the other program under the scope of these terms. | |
103 | ||
104 | 3. You may copy and distribute Ghostscript (or a portion or derivative | |
105 | of it, under Paragraph 2) in object code or executable form under the | |
106 | terms of Paragraphs 1 and 2 above provided that you also do one of the | |
107 | following: | |
108 | ||
109 | a) accompany it with the complete corresponding machine-readable | |
110 | source code, which must be distributed under the terms of | |
111 | Paragraphs 1 and 2 above; or, | |
112 | ||
113 | b) accompany it with a written offer, valid for at least three | |
114 | years, to give any third party free (except for a nominal | |
115 | shipping charge) a complete machine-readable copy of the | |
116 | corresponding source code, to be distributed under the terms of | |
117 | Paragraphs 1 and 2 above; or, | |
118 | ||
119 | c) accompany it with the information you received as to where the | |
120 | corresponding source code may be obtained. (This alternative is | |
121 | allowed only for noncommercial distribution and only if you | |
122 | received the program in object code or executable form alone.) | |
123 | ||
124 | For an executable file, complete source code means all the source code for | |
125 | all modules it contains; but, as a special exception, it need not include | |
126 | source code for modules which are standard libraries that accompany the | |
127 | operating system on which the executable file runs. | |
128 | ||
129 | 4. You may not copy, sublicense, distribute or transfer Ghostscript | |
130 | except as expressly provided under this License Agreement. Any attempt | |
131 | otherwise to copy, sublicense, distribute or transfer Ghostscript is | |
132 | void and your rights to use the program under this License agreement | |
133 | shall be automatically terminated. However, parties who have received | |
134 | computer software programs from you with this License Agreement will not | |
135 | have their licenses terminated so long as such parties remain in full | |
136 | compliance. | |
137 | ||
138 | 5. If you wish to incorporate parts of Ghostscript into other free | |
139 | programs whose distribution conditions are different, write to the Free | |
140 | Software Foundation at 675 Mass Ave, Cambridge, MA 02139. We have not | |
141 | yet worked out a simple rule that can be stated here, but we will often | |
142 | permit this. We will be guided by the two goals of preserving the free | |
143 | status of all derivatives of our free software and of promoting the | |
144 | sharing and reuse of software. | |
145 | ||
146 | Your comments and suggestions about our licensing policies and our | |
147 | software are welcome! Please contact the Free Software Foundation, | |
148 | Inc., 675 Mass Ave, Cambridge, MA 02139, or call (617) 876-3296. | |
149 | ||
150 | NO WARRANTY | |
151 | ||
152 | BECAUSE GHOSTSCRIPT IS LICENSED FREE OF CHARGE, WE PROVIDE ABSOLUTELY | |
153 | NO WARRANTY, TO THE EXTENT PERMITTED BY APPLICABLE STATE LAW. EXCEPT | |
154 | WHEN OTHERWISE STATED IN WRITING, FREE SOFTWARE FOUNDATION, INC, RICHARD | |
155 | M. STALLMAN, ALADDIN ENTERPRISES, L. PETER DEUTSCH, AND/OR OTHER PARTIES | |
156 | PROVIDE GHOSTSCRIPT "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER | |
157 | EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED | |
158 | WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE | |
159 | ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF GHOSTSCRIPT IS WITH | |
160 | YOU. SHOULD GHOSTSCRIPT PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL | |
161 | NECESSARY SERVICING, REPAIR OR CORRECTION. | |
162 | ||
163 | IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW WILL RICHARD M. | |
164 | STALLMAN, THE FREE SOFTWARE FOUNDATION, INC., L. PETER DEUTSCH, ALADDIN | |
165 | ENTERPRISES, AND/OR ANY OTHER PARTY WHO MAY MODIFY AND REDISTRIBUTE | |
166 | GHOSTSCRIPT AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING | |
167 | ANY LOST PROFITS, LOST MONIES, OR OTHER SPECIAL, INCIDENTAL OR | |
168 | CONSEQUENTIAL DAMAGES ARISING OUT OF THE USE OR INABILITY TO USE | |
169 | (INCLUDING BUT NOT LIMITED TO LOSS OF DATA OR DATA BEING RENDERED | |
170 | INACCURATE OR LOSSES SUSTAINED BY THIRD PARTIES OR A FAILURE OF THE | |
171 | PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS) GHOSTSCRIPT, EVEN IF YOU | |
172 | HAVE BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES, OR FOR ANY CLAIM | |
173 | BY ANY OTHER PARTY. | |
174 | ||
175 | -------------------- End of file COPYLEFT ------------------------------ | |
176 | */ | |
177 | ||
178 | /* | |
179 | * Usage: | |
180 | ansi2knr input_file [output_file] | |
181 | * If no output_file is supplied, output goes to stdout. | |
182 | * There are no error messages. | |
183 | * | |
184 | * ansi2knr recognizes function definitions by seeing a non-keyword | |
185 | * identifier at the left margin, followed by a left parenthesis, | |
186 | * with a right parenthesis as the last character on the line, | |
187 | * and with a left brace as the first token on the following line | |
188 | * (ignoring possible intervening comments). | |
189 | * It will recognize a multi-line header provided that no intervening | |
190 | * line ends with a left or right brace or a semicolon. | |
191 | * These algorithms ignore whitespace and comments, except that | |
192 | * the function name must be the first thing on the line. | |
193 | * The following constructs will confuse it: | |
194 | * - Any other construct that starts at the left margin and | |
195 | * follows the above syntax (such as a macro or function call). | |
196 | * - Some macros that tinker with the syntax of the function header. | |
197 | */ | |
198 | ||
199 | /* | |
200 | * The original and principal author of ansi2knr is L. Peter Deutsch | |
201 | * <ghost@aladdin.com>. Other authors are noted in the change history | |
202 | * that follows (in reverse chronological order): | |
203 | lpd 96-01-21 added code to cope with not HAVE_CONFIG_H and with | |
204 | compilers that don't understand void, as suggested by | |
205 | Tom Lane | |
206 | lpd 96-01-15 changed to require that the first non-comment token | |
207 | on the line following a function header be a left brace, | |
208 | to reduce sensitivity to macros, as suggested by Tom Lane | |
209 | <tgl@sss.pgh.pa.us> | |
210 | lpd 95-06-22 removed #ifndefs whose sole purpose was to define | |
211 | undefined preprocessor symbols as 0; changed all #ifdefs | |
212 | for configuration symbols to #ifs | |
213 | lpd 95-04-05 changed copyright notice to make it clear that | |
214 | including ansi2knr in a program does not bring the entire | |
215 | program under the GPL | |
216 | lpd 94-12-18 added conditionals for systems where ctype macros | |
217 | don't handle 8-bit characters properly, suggested by | |
218 | Francois Pinard <pinard@iro.umontreal.ca>; | |
219 | removed --varargs switch (this is now the default) | |
220 | lpd 94-10-10 removed CONFIG_BROKETS conditional | |
221 | lpd 94-07-16 added some conditionals to help GNU `configure', | |
222 | suggested by Francois Pinard <pinard@iro.umontreal.ca>; | |
223 | properly erase prototype args in function parameters, | |
224 | contributed by Jim Avera <jima@netcom.com>; | |
225 | correct error in writeblanks (it shouldn't erase EOLs) | |
226 | lpd 89-xx-xx original version | |
227 | */ | |
228 | ||
229 | /* Most of the conditionals here are to make ansi2knr work with */ | |
230 | /* or without the GNU configure machinery. */ | |
231 | ||
232 | #if HAVE_CONFIG_H | |
233 | # include <config.h> | |
234 | #endif | |
235 | ||
236 | #include <stdio.h> | |
237 | #include <ctype.h> | |
238 | ||
239 | #if HAVE_CONFIG_H | |
240 | ||
241 | /* | |
242 | For properly autoconfiguring ansi2knr, use AC_CONFIG_HEADER(config.h). | |
243 | This will define HAVE_CONFIG_H and so, activate the following lines. | |
244 | */ | |
245 | ||
246 | # if STDC_HEADERS || HAVE_STRING_H | |
247 | # include <string.h> | |
248 | # else | |
249 | # include <strings.h> | |
250 | # endif | |
251 | ||
252 | #else /* not HAVE_CONFIG_H */ | |
253 | ||
254 | /* Otherwise do it the hard way */ | |
255 | ||
256 | # ifdef BSD | |
257 | # include <strings.h> | |
258 | # else | |
259 | # ifdef VMS | |
260 | extern int strlen(), strncmp(); | |
261 | # else | |
262 | # include <string.h> | |
263 | # endif | |
264 | # endif | |
265 | ||
266 | #endif /* not HAVE_CONFIG_H */ | |
267 | ||
268 | #if STDC_HEADERS | |
269 | # include <stdlib.h> | |
270 | #else | |
271 | /* | |
272 | malloc and free should be declared in stdlib.h, | |
273 | but if you've got a K&R compiler, they probably aren't. | |
274 | */ | |
275 | # ifdef MSDOS | |
276 | # include <malloc.h> | |
277 | # else | |
278 | # ifdef VMS | |
279 | extern char *malloc(); | |
280 | extern void free(); | |
281 | # else | |
282 | extern char *malloc(); | |
283 | extern int free(); | |
284 | # endif | |
285 | # endif | |
286 | ||
287 | #endif | |
288 | ||
289 | /* | |
290 | * The ctype macros don't always handle 8-bit characters correctly. | |
291 | * Compensate for this here. | |
292 | */ | |
293 | #ifdef isascii | |
294 | # undef HAVE_ISASCII /* just in case */ | |
295 | # define HAVE_ISASCII 1 | |
296 | #else | |
297 | #endif | |
298 | #if STDC_HEADERS || !HAVE_ISASCII | |
299 | # define is_ascii(c) 1 | |
300 | #else | |
301 | # define is_ascii(c) isascii(c) | |
302 | #endif | |
303 | ||
304 | #define is_space(c) (is_ascii(c) && isspace(c)) | |
305 | #define is_alpha(c) (is_ascii(c) && isalpha(c)) | |
306 | #define is_alnum(c) (is_ascii(c) && isalnum(c)) | |
307 | ||
308 | /* Scanning macros */ | |
309 | #define isidchar(ch) (is_alnum(ch) || (ch) == '_') | |
310 | #define isidfirstchar(ch) (is_alpha(ch) || (ch) == '_') | |
311 | ||
312 | /* Forward references */ | |
313 | char *skipspace(); | |
314 | int writeblanks(); | |
315 | int test1(); | |
316 | int convert1(); | |
317 | ||
318 | /* The main program */ | |
319 | int | |
320 | main(argc, argv) | |
321 | int argc; | |
322 | char *argv[]; | |
323 | { FILE *in, *out; | |
324 | #define bufsize 5000 /* arbitrary size */ | |
325 | char *buf; | |
326 | char *line; | |
327 | char *more; | |
328 | /* | |
329 | * In previous versions, ansi2knr recognized a --varargs switch. | |
330 | * If this switch was supplied, ansi2knr would attempt to convert | |
331 | * a ... argument to va_alist and va_dcl; if this switch was not | |
332 | * supplied, ansi2knr would simply drop any such arguments. | |
333 | * Now, ansi2knr always does this conversion, and we only | |
334 | * check for this switch for backward compatibility. | |
335 | */ | |
336 | int convert_varargs = 1; | |
337 | ||
338 | if ( argc > 1 && argv[1][0] == '-' ) | |
339 | { if ( !strcmp(argv[1], "--varargs") ) | |
340 | { convert_varargs = 1; | |
341 | argc--; | |
342 | argv++; | |
343 | } | |
344 | else | |
345 | { fprintf(stderr, "Unrecognized switch: %s\n", argv[1]); | |
346 | exit(1); | |
347 | } | |
348 | } | |
349 | switch ( argc ) | |
350 | { | |
351 | default: | |
352 | printf("Usage: ansi2knr input_file [output_file]\n"); | |
353 | exit(0); | |
354 | case 2: | |
355 | out = stdout; | |
356 | break; | |
357 | case 3: | |
358 | out = fopen(argv[2], "w"); | |
359 | if ( out == NULL ) | |
360 | { fprintf(stderr, "Cannot open output file %s\n", argv[2]); | |
361 | exit(1); | |
362 | } | |
363 | } | |
364 | in = fopen(argv[1], "r"); | |
365 | if ( in == NULL ) | |
366 | { fprintf(stderr, "Cannot open input file %s\n", argv[1]); | |
367 | exit(1); | |
368 | } | |
369 | fprintf(out, "#line 1 \"%s\"\n", argv[1]); | |
370 | buf = malloc(bufsize); | |
371 | line = buf; | |
372 | while ( fgets(line, (unsigned)(buf + bufsize - line), in) != NULL ) | |
373 | { | |
374 | test: line += strlen(line); | |
375 | switch ( test1(buf) ) | |
376 | { | |
377 | case 2: /* a function header */ | |
378 | convert1(buf, out, 1, convert_varargs); | |
379 | break; | |
380 | case 1: /* a function */ | |
381 | /* Check for a { at the start of the next line. */ | |
382 | more = ++line; | |
383 | f: if ( line >= buf + (bufsize - 1) ) /* overflow check */ | |
384 | goto wl; | |
385 | if ( fgets(line, (unsigned)(buf + bufsize - line), in) == NULL ) | |
386 | goto wl; | |
387 | switch ( *skipspace(more, 1) ) | |
388 | { | |
389 | case '{': | |
390 | /* Definitely a function header. */ | |
391 | convert1(buf, out, 0, convert_varargs); | |
392 | fputs(more, out); | |
393 | break; | |
394 | case 0: | |
395 | /* The next line was blank or a comment: */ | |
396 | /* keep scanning for a non-comment. */ | |
397 | line += strlen(line); | |
398 | goto f; | |
399 | default: | |
400 | /* buf isn't a function header, but */ | |
401 | /* more might be. */ | |
402 | fputs(buf, out); | |
403 | strcpy(buf, more); | |
404 | line = buf; | |
405 | goto test; | |
406 | } | |
407 | break; | |
408 | case -1: /* maybe the start of a function */ | |
409 | if ( line != buf + (bufsize - 1) ) /* overflow check */ | |
410 | continue; | |
411 | /* falls through */ | |
412 | default: /* not a function */ | |
413 | wl: fputs(buf, out); | |
414 | break; | |
415 | } | |
416 | line = buf; | |
417 | } | |
418 | if ( line != buf ) | |
419 | fputs(buf, out); | |
420 | free(buf); | |
421 | fclose(out); | |
422 | fclose(in); | |
423 | return 0; | |
424 | } | |
425 | ||
426 | /* Skip over space and comments, in either direction. */ | |
427 | char * | |
428 | skipspace(p, dir) | |
429 | register char *p; | |
430 | register int dir; /* 1 for forward, -1 for backward */ | |
431 | { for ( ; ; ) | |
432 | { while ( is_space(*p) ) | |
433 | p += dir; | |
434 | if ( !(*p == '/' && p[dir] == '*') ) | |
435 | break; | |
436 | p += dir; p += dir; | |
437 | while ( !(*p == '*' && p[dir] == '/') ) | |
438 | { if ( *p == 0 ) | |
439 | return p; /* multi-line comment?? */ | |
440 | p += dir; | |
441 | } | |
442 | p += dir; p += dir; | |
443 | } | |
444 | return p; | |
445 | } | |
446 | ||
447 | /* | |
448 | * Write blanks over part of a string. | |
449 | * Don't overwrite end-of-line characters. | |
450 | */ | |
451 | int | |
452 | writeblanks(start, end) | |
453 | char *start; | |
454 | char *end; | |
455 | { char *p; | |
456 | for ( p = start; p < end; p++ ) | |
457 | if ( *p != '\r' && *p != '\n' ) | |
458 | *p = ' '; | |
459 | return 0; | |
460 | } | |
461 | ||
462 | /* | |
463 | * Test whether the string in buf is a function definition. | |
464 | * The string may contain and/or end with a newline. | |
465 | * Return as follows: | |
466 | * 0 - definitely not a function definition; | |
467 | * 1 - definitely a function definition; | |
468 | * 2 - definitely a function prototype (NOT USED); | |
469 | * -1 - may be the beginning of a function definition, | |
470 | * append another line and look again. | |
471 | * The reason we don't attempt to convert function prototypes is that | |
472 | * Ghostscript's declaration-generating macros look too much like | |
473 | * prototypes, and confuse the algorithms. | |
474 | */ | |
475 | int | |
476 | test1(buf) | |
477 | char *buf; | |
478 | { register char *p = buf; | |
479 | char *bend; | |
480 | char *endfn; | |
481 | int contin; | |
482 | ||
483 | if ( !isidfirstchar(*p) ) | |
484 | return 0; /* no name at left margin */ | |
485 | bend = skipspace(buf + strlen(buf) - 1, -1); | |
486 | switch ( *bend ) | |
487 | { | |
488 | case ';': contin = 0 /*2*/; break; | |
489 | case ')': contin = 1; break; | |
490 | case '{': return 0; /* not a function */ | |
491 | case '}': return 0; /* not a function */ | |
492 | default: contin = -1; | |
493 | } | |
494 | while ( isidchar(*p) ) | |
495 | p++; | |
496 | endfn = p; | |
497 | p = skipspace(p, 1); | |
498 | if ( *p++ != '(' ) | |
499 | return 0; /* not a function */ | |
500 | p = skipspace(p, 1); | |
501 | if ( *p == ')' ) | |
502 | return 0; /* no parameters */ | |
503 | /* Check that the apparent function name isn't a keyword. */ | |
504 | /* We only need to check for keywords that could be followed */ | |
505 | /* by a left parenthesis (which, unfortunately, is most of them). */ | |
506 | { static char *words[] = | |
507 | { "asm", "auto", "case", "char", "const", "double", | |
508 | "extern", "float", "for", "if", "int", "long", | |
509 | "register", "return", "short", "signed", "sizeof", | |
510 | "static", "switch", "typedef", "unsigned", | |
511 | "void", "volatile", "while", 0 | |
512 | }; | |
513 | char **key = words; | |
514 | char *kp; | |
515 | int len = endfn - buf; | |
516 | ||
517 | while ( (kp = *key) != 0 ) | |
518 | { if ( strlen(kp) == len && !strncmp(kp, buf, len) ) | |
519 | return 0; /* name is a keyword */ | |
520 | key++; | |
521 | } | |
522 | } | |
523 | return contin; | |
524 | } | |
525 | ||
526 | /* Convert a recognized function definition or header to K&R syntax. */ | |
527 | int | |
528 | convert1(buf, out, header, convert_varargs) | |
529 | char *buf; | |
530 | FILE *out; | |
531 | int header; /* Boolean */ | |
532 | int convert_varargs; /* Boolean */ | |
533 | { char *endfn; | |
534 | register char *p; | |
535 | char **breaks; | |
536 | unsigned num_breaks = 2; /* for testing */ | |
537 | char **btop; | |
538 | char **bp; | |
539 | char **ap; | |
540 | char *vararg = 0; | |
541 | ||
542 | /* Pre-ANSI implementations don't agree on whether strchr */ | |
543 | /* is called strchr or index, so we open-code it here. */ | |
544 | for ( endfn = buf; *(endfn++) != '('; ) | |
545 | ; | |
546 | top: p = endfn; | |
547 | breaks = (char **)malloc(sizeof(char *) * num_breaks * 2); | |
548 | if ( breaks == 0 ) | |
549 | { /* Couldn't allocate break table, give up */ | |
550 | fprintf(stderr, "Unable to allocate break table!\n"); | |
551 | fputs(buf, out); | |
552 | return -1; | |
553 | } | |
554 | btop = breaks + num_breaks * 2 - 2; | |
555 | bp = breaks; | |
556 | /* Parse the argument list */ | |
557 | do | |
558 | { int level = 0; | |
559 | char *lp = NULL; | |
560 | char *rp; | |
561 | char *end = NULL; | |
562 | ||
563 | if ( bp >= btop ) | |
564 | { /* Filled up break table. */ | |
565 | /* Allocate a bigger one and start over. */ | |
566 | free((char *)breaks); | |
567 | num_breaks <<= 1; | |
568 | goto top; | |
569 | } | |
570 | *bp++ = p; | |
571 | /* Find the end of the argument */ | |
572 | for ( ; end == NULL; p++ ) | |
573 | { switch(*p) | |
574 | { | |
575 | case ',': | |
576 | if ( !level ) end = p; | |
577 | break; | |
578 | case '(': | |
579 | if ( !level ) lp = p; | |
580 | level++; | |
581 | break; | |
582 | case ')': | |
583 | if ( --level < 0 ) end = p; | |
584 | else rp = p; | |
585 | break; | |
586 | case '/': | |
587 | p = skipspace(p, 1) - 1; | |
588 | break; | |
589 | default: | |
590 | ; | |
591 | } | |
592 | } | |
593 | /* Erase any embedded prototype parameters. */ | |
594 | if ( lp ) | |
595 | writeblanks(lp + 1, rp); | |
596 | p--; /* back up over terminator */ | |
597 | /* Find the name being declared. */ | |
598 | /* This is complicated because of procedure and */ | |
599 | /* array modifiers. */ | |
600 | for ( ; ; ) | |
601 | { p = skipspace(p - 1, -1); | |
602 | switch ( *p ) | |
603 | { | |
604 | case ']': /* skip array dimension(s) */ | |
605 | case ')': /* skip procedure args OR name */ | |
606 | { int level = 1; | |
607 | while ( level ) | |
608 | switch ( *--p ) | |
609 | { | |
610 | case ']': case ')': level++; break; | |
611 | case '[': case '(': level--; break; | |
612 | case '/': p = skipspace(p, -1) + 1; break; | |
613 | default: ; | |
614 | } | |
615 | } | |
616 | if ( *p == '(' && *skipspace(p + 1, 1) == '*' ) | |
617 | { /* We found the name being declared */ | |
618 | while ( !isidfirstchar(*p) ) | |
619 | p = skipspace(p, 1) + 1; | |
620 | goto found; | |
621 | } | |
622 | break; | |
623 | default: | |
624 | goto found; | |
625 | } | |
626 | } | |
627 | found: if ( *p == '.' && p[-1] == '.' && p[-2] == '.' ) | |
628 | { if ( convert_varargs ) | |
629 | { *bp++ = "va_alist"; | |
630 | vararg = p-2; | |
631 | } | |
632 | else | |
633 | { p++; | |
634 | if ( bp == breaks + 1 ) /* sole argument */ | |
635 | writeblanks(breaks[0], p); | |
636 | else | |
637 | writeblanks(bp[-1] - 1, p); | |
638 | bp--; | |
639 | } | |
640 | } | |
641 | else | |
642 | { while ( isidchar(*p) ) p--; | |
643 | *bp++ = p+1; | |
644 | } | |
645 | p = end; | |
646 | } | |
647 | while ( *p++ == ',' ); | |
648 | *bp = p; | |
649 | /* Make a special check for 'void' arglist */ | |
650 | if ( bp == breaks+2 ) | |
651 | { p = skipspace(breaks[0], 1); | |
652 | if ( !strncmp(p, "void", 4) ) | |
653 | { p = skipspace(p+4, 1); | |
654 | if ( p == breaks[2] - 1 ) | |
655 | { bp = breaks; /* yup, pretend arglist is empty */ | |
656 | writeblanks(breaks[0], p + 1); | |
657 | } | |
658 | } | |
659 | } | |
660 | /* Put out the function name and left parenthesis. */ | |
661 | p = buf; | |
662 | while ( p != endfn ) putc(*p, out), p++; | |
663 | /* Put out the declaration. */ | |
664 | if ( header ) | |
665 | { fputs(");", out); | |
666 | for ( p = breaks[0]; *p; p++ ) | |
667 | if ( *p == '\r' || *p == '\n' ) | |
668 | putc(*p, out); | |
669 | } | |
670 | else | |
671 | { for ( ap = breaks+1; ap < bp; ap += 2 ) | |
672 | { p = *ap; | |
673 | while ( isidchar(*p) ) | |
674 | putc(*p, out), p++; | |
675 | if ( ap < bp - 1 ) | |
676 | fputs(", ", out); | |
677 | } | |
678 | fputs(") ", out); | |
679 | /* Put out the argument declarations */ | |
680 | for ( ap = breaks+2; ap <= bp; ap += 2 ) | |
681 | (*ap)[-1] = ';'; | |
682 | if ( vararg != 0 ) | |
683 | { *vararg = 0; | |
684 | fputs(breaks[0], out); /* any prior args */ | |
685 | fputs("va_dcl", out); /* the final arg */ | |
686 | fputs(bp[0], out); | |
687 | } | |
688 | else | |
689 | fputs(breaks[0], out); | |
690 | } | |
691 | free((char *)breaks); | |
692 | return 0; | |
693 | } |