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source: kBuild/trunk/src/kDepPre/kDepPre.c@ 583

Last change on this file since 583 was 393, checked in by bird, 19 years ago
  • src/kDepIDB/kDepIDB.c:

o Initial coding. (This is a VC++ dependency extractor.)

  • src/kDepPre/kDepPre.c, src/lib/kDep.h, src/lib/kDep.c, Config.kmk:

o Created a library for the dep*() functions.
o Removed the IDB hacks from kDepPre.
  • Property svn:eol-style set to native
  • Property svn:keywords set to Author Date Id Revision
File size: 13.1 KB
Line 
1/* $Id: kDepPre.c 393 2006-01-13 00:42:10Z bird $ */
2/** @file
3 *
4 * kDepPre - Dependency Generator using Precompiler output.
5 *
6 * Copyright (c) 2005-2006 knut st. osmundsen <[email protected]>
7 *
8 *
9 * This file is part of kBuild.
10 *
11 * kBuild is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License as published by
13 * the Free Software Foundation; either version 2 of the License, or
14 * (at your option) any later version.
15 *
16 * kBuild is distributed in the hope that it will be useful,
17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 * GNU General Public License for more details.
20 *
21 * You should have received a copy of the GNU General Public License
22 * along with kBuild; if not, write to the Free Software
23 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
24 *
25 */
26
27
28/*******************************************************************************
29* Header Files *
30*******************************************************************************/
31#include <stdio.h>
32#include <string.h>
33#include <ctype.h>
34#include "kDep.h"
35
36#ifdef HAVE_FGETC_UNLOCKED
37# define FGETC(s) getc_unlocked(s)
38#else
39# define FGETC(s) fgetc(s)
40#endif
41
42#ifdef NEED_ISBLANK
43# define isblank(ch) ( (unsigned char)(ch) == ' ' || (unsigned char)(ch) == '\t' )
44#endif
45
46
47
48
49/**
50 * Parses the output from a preprocessor of a C-style language.
51 *
52 * @returns 0 on success.
53 * @returns 1 or other approriate exit code on failure.
54 * @param pInput Input stream. (probably not seekable)
55 */
56static int ParseCPrecompiler(FILE *pInput)
57{
58 enum
59 {
60 C_DISCOVER = 0,
61 C_SKIP_LINE,
62 C_PARSE_FILENAME,
63 C_EOF
64 } enmMode = C_DISCOVER;
65 PDEP pDep = NULL;
66 int ch;
67 char szBuf[8192];
68
69 for (;;)
70 {
71 switch (enmMode)
72 {
73 /*
74 * Start of line, need to look for '#[[:space]]*line <num> "file"' and '# <num> "file"'.
75 */
76 case C_DISCOVER:
77 /* first find '#' */
78 while ((ch = FGETC(pInput)) != EOF)
79 if (!isblank(ch))
80 break;
81 if (ch == '#')
82 {
83 /* skip spaces */
84 while ((ch = FGETC(pInput)) != EOF)
85 if (!isblank(ch))
86 break;
87
88 /* check for "line" */
89 if (ch == 'l')
90 {
91 if ( (ch = FGETC(pInput)) == 'i'
92 && (ch = FGETC(pInput)) == 'n'
93 && (ch = FGETC(pInput)) == 'e')
94 {
95 ch = FGETC(pInput);
96 if (isblank(ch))
97 {
98 /* skip spaces */
99 while ((ch = FGETC(pInput)) != EOF)
100 if (!isblank(ch))
101 break;
102 }
103 else
104 ch = 'x';
105 }
106 else
107 ch = 'x';
108 }
109
110 /* line number */
111 if (ch >= '0' && ch <= '9')
112 {
113 /* skip the number following spaces */
114 while ((ch = FGETC(pInput)) != EOF)
115 if (!isxdigit(ch))
116 break;
117 if (isblank(ch))
118 {
119 while ((ch = FGETC(pInput)) != EOF)
120 if (!isblank(ch))
121 break;
122 /* quoted filename */
123 if (ch == '"')
124 {
125 enmMode = C_PARSE_FILENAME;
126 break;
127 }
128 }
129 }
130 }
131 enmMode = C_SKIP_LINE;
132 break;
133
134 /*
135 * Skip past the end of the current line.
136 */
137 case C_SKIP_LINE:
138 do
139 {
140 if ( ch == '\r'
141 || ch == '\n')
142 break;
143 } while ((ch = FGETC(pInput)) != EOF);
144 enmMode = C_DISCOVER;
145 break;
146
147 /*
148 * Parse the filename.
149 */
150 case C_PARSE_FILENAME:
151 {
152 /* retreive and unescape the filename. */
153 char *psz = &szBuf[0];
154 while ( (ch = FGETC(pInput)) != EOF
155 && psz < &szBuf[sizeof(szBuf) - 1])
156 {
157 if (ch == '\\')
158 {
159 ch = FGETC(pInput);
160 switch (ch)
161 {
162 case '\\': ch = '/'; break;
163 case 't': ch = '\t'; break;
164 case 'r': ch = '\r'; break;
165 case 'n': ch = '\n'; break;
166 case 'b': ch = '\b'; break;
167 default:
168 fprintf(stderr, "warning: unknown escape char '%c'\n", ch);
169 continue;
170
171 }
172 *psz++ = ch == '\\' ? '/' : ch;
173 }
174 else if (ch != '"')
175 *psz++ = ch;
176 else
177 {
178 size_t cchFilename = psz - &szBuf[0];
179 *psz = '\0';
180 /* compare with current dep, add & switch on mismatch. */
181 if ( !pDep
182 || pDep->cchFilename != cchFilename
183 || memcmp(pDep->szFilename, szBuf, cchFilename))
184 pDep = depAdd(szBuf, cchFilename);
185 break;
186 }
187 }
188 enmMode = C_SKIP_LINE;
189 break;
190 }
191
192 /*
193 * Handle EOF.
194 */
195 case C_EOF:
196 if (feof(pInput))
197 return 0;
198 enmMode = C_DISCOVER;
199 break;
200 }
201 if (ch == EOF)
202 enmMode = C_EOF;
203 }
204
205 return 0;
206}
207
208
209static void usage(const char *argv0)
210{
211 printf("syntax: %s [-l=c] -o <output> -t <target> [-f] [-s] < - | <filename> | -e <cmdline> >\n", argv0);
212}
213
214
215int main(int argc, char *argv[])
216{
217 int i;
218
219 /* Arguments. */
220 int iExec = 0;
221 FILE *pOutput = NULL;
222 const char *pszOutput = NULL;
223 FILE *pInput = NULL;
224 const char *pszTarget = NULL;
225 int fStubs = 0;
226 int fFixCase = 0;
227 /* Argument parsing. */
228 int fInput = 0; /* set when we've found input argument. */
229
230 /*
231 * Parse arguments.
232 */
233 if (argc <= 1)
234 {
235 usage(argv[0]);
236 return 1;
237 }
238 for (i = 1; i < argc; i++)
239 {
240 if (argv[i][0] == '-')
241 {
242 switch (argv[i][1])
243 {
244 /*
245 * Output file.
246 */
247 case 'o':
248 {
249 pszOutput = &argv[i][2];
250 if (pOutput)
251 {
252 fprintf(stderr, "%s: syntax error: only one output file!\n", argv[0]);
253 return 1;
254 }
255 if (!*pszOutput)
256 {
257 if (++i >= argc)
258 {
259 fprintf(stderr, "%s: syntax error: The '-o' argument is missing the filename.\n", argv[0]);
260 return 1;
261 }
262 pszOutput = argv[i];
263 }
264 if (pszOutput[0] == '-' && !pszOutput[1])
265 pOutput = stdout;
266 else
267 pOutput = fopen(pszOutput, "w");
268 if (!pOutput)
269 {
270 fprintf(stderr, "%s: error: Failed to create output file '%s'.\n", argv[0], pszOutput);
271 return 1;
272 }
273 break;
274 }
275
276 /*
277 * Language spec.
278 */
279 case 'l':
280 {
281 const char *psz = &argv[i][2];
282 if (*psz == '=')
283 psz++;
284 if (!strcmp(psz, "c"))
285 ;
286 else
287 {
288 fprintf(stderr, "%s: error: The '%s' language is not supported.\n", argv[0], psz);
289 return 1;
290 }
291 break;
292 }
293
294 /*
295 * Target name.
296 */
297 case 't':
298 {
299 if (pszTarget)
300 {
301 fprintf(stderr, "%s: syntax error: only one target!\n", argv[0]);
302 return 1;
303 }
304 pszTarget = &argv[i][2];
305 if (!*pszTarget)
306 {
307 if (++i >= argc)
308 {
309 fprintf(stderr, "%s: syntax error: The '-t' argument is missing the target name.\n", argv[0]);
310 return 1;
311 }
312 pszTarget = argv[i];
313 }
314 break;
315 }
316
317 /*
318 * Exec.
319 */
320 case 'e':
321 {
322 if (++i >= argc)
323 {
324 fprintf(stderr, "%s: syntax error: The '-e' argument is missing the command.\n", argv[0]);
325 return 1;
326 }
327 iExec = i;
328 i = argc - 1;
329 break;
330 }
331
332 /*
333 * Pipe input.
334 */
335 case '\0':
336 {
337 pInput = stdin;
338 fInput = 1;
339 break;
340 }
341
342 /*
343 * Fix case.
344 */
345 case 'f':
346 {
347 fFixCase = 1;
348 break;
349 }
350
351 /*
352 * Generate stubs.
353 */
354 case 's':
355 {
356 fStubs = 1;
357 break;
358 }
359
360 /*
361 * Invalid argument.
362 */
363 default:
364 fprintf(stderr, "%s: syntax error: Invalid argument '%s'.\n", argv[0], argv[i]);
365 usage(argv[0]);
366 return 1;
367 }
368 }
369 else
370 {
371 pInput = fopen(argv[i], "r");
372 if (!pInput)
373 {
374 fprintf(stderr, "%s: error: Failed to open input file '%s'.\n", argv[0], argv[i]);
375 return 1;
376 }
377 fInput = 1;
378 }
379
380 /*
381 * End of the line?
382 */
383 if (fInput)
384 {
385 if (++i < argc)
386 {
387 fprintf(stderr, "%s: syntax error: No arguments shall follow the input spec.\n", argv[0]);
388 return 1;
389 }
390 break;
391 }
392 }
393
394 /*
395 * Got all we require?
396 */
397 if (!pInput && iExec <= 0)
398 {
399 fprintf(stderr, "%s: syntax error: No input!\n", argv[0]);
400 return 1;
401 }
402 if (!pOutput)
403 {
404 fprintf(stderr, "%s: syntax error: No output!\n", argv[0]);
405 return 1;
406 }
407 if (!pszTarget)
408 {
409 fprintf(stderr, "%s: syntax error: No target!\n", argv[0]);
410 return 1;
411 }
412
413 /*
414 * Spawn process?
415 */
416 if (iExec > 0)
417 {
418 fprintf(stderr, "%s: -e is not yet implemented!\n", argv[0]);
419 return 1;
420 }
421
422 /*
423 * Do the parsing.
424 */
425 i = ParseCPrecompiler(pInput);
426
427 /*
428 * Reap child.
429 */
430 if (iExec > 0)
431 {
432 // later
433 }
434
435 /*
436 * Write the dependecy file.
437 */
438 if (!i)
439 {
440 depOptimize(fFixCase);
441 fprintf(pOutput, "%s:", pszTarget);
442 depPrint(pOutput);
443 if (fStubs)
444 depPrintStubs(pOutput);
445 }
446
447 /*
448 * Close the output, delete output on failure.
449 */
450 if (!i && ferror(pOutput))
451 {
452 i = 1;
453 fprintf(stderr, "%s: error: Error writing to '%s'.\n", argv[0], pszOutput);
454 }
455 fclose(pOutput);
456 if (i)
457 {
458 if (unlink(pszOutput))
459 fprintf(stderr, "%s: warning: failed to remove output file '%s' on failure.\n", argv[0], pszOutput);
460 }
461
462 return i;
463}
464
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