/[jscoverage]/trunk/util.c
ViewVC logotype

Annotation of /trunk/util.c

Parent Directory Parent Directory | Revision Log Revision Log


Revision 372 - (hide annotations)
Mon Oct 27 20:36:23 2008 UTC (10 years, 9 months ago) by siliconforks
File MIME type: text/plain
File size: 13196 byte(s)
Don't exit on warnings.
1 siliconforks 2 /*
2     util.c - general purpose utility routines
3 siliconforks 87 Copyright (C) 2007, 2008 siliconforks.com
4 siliconforks 2
5     This program is free software; you can redistribute it and/or modify
6     it under the terms of the GNU General Public License as published by
7     the Free Software Foundation; either version 2 of the License, or
8     (at your option) any later version.
9    
10     This program is distributed in the hope that it will be useful,
11     but WITHOUT ANY WARRANTY; without even the implied warranty of
12     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13     GNU General Public License for more details.
14    
15     You should have received a copy of the GNU General Public License along
16     with this program; if not, write to the Free Software Foundation, Inc.,
17     51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
18     */
19    
20 siliconforks 106 #define _GNU_SOURCE
21    
22     #include <config.h>
23    
24 siliconforks 2 #include "util.h"
25    
26     #include <assert.h>
27     #include <errno.h>
28 siliconforks 99 #include <limits.h>
29 siliconforks 2 #include <stdarg.h>
30     #include <stdio.h>
31 siliconforks 106 #include <stdint.h>
32 siliconforks 2 #include <string.h>
33     #include <strings.h>
34    
35     #include <dirent.h>
36     #include <libgen.h>
37     #include <sys/stat.h>
38     #include <sys/types.h>
39     #include <unistd.h>
40    
41     const char * program = NULL;
42    
43     void fatal(const char * format, ...) {
44     fprintf(stderr, "%s: ", program);
45     va_list ap;
46     va_start(ap, format);
47     vfprintf(stderr, format, ap);
48     va_end(ap);
49     fputc('\n', stderr);
50 siliconforks 191 exit(EXIT_FAILURE);
51     }
52    
53     void fatal_command_line(const char * format, ...) {
54     fprintf(stderr, "%s: ", program);
55     va_list ap;
56     va_start(ap, format);
57     vfprintf(stderr, format, ap);
58     va_end(ap);
59     fputc('\n', stderr);
60 siliconforks 2 fprintf(stderr, "Try `%s --help' for more information.\n", program);
61     exit(EXIT_FAILURE);
62     }
63    
64 siliconforks 370 void fatal_source(const char * source_file, unsigned int line_number, const char * format, ...) {
65     fprintf(stderr, "%s:%s:%u: ", program, source_file, line_number);
66     va_list ap;
67     va_start(ap, format);
68     vfprintf(stderr, format, ap);
69     va_end(ap);
70     fputc('\n', stderr);
71     exit(EXIT_FAILURE);
72     }
73    
74 siliconforks 372 void warn_source(const char * source_file, unsigned int line_number, const char * format, ...) {
75     fprintf(stderr, "%s:%s:%u: ", program, source_file, line_number);
76     va_list ap;
77     va_start(ap, format);
78     vfprintf(stderr, format, ap);
79     va_end(ap);
80     fputc('\n', stderr);
81     }
82    
83 siliconforks 311 void version(void) {
84     printf("%s %s\n", program, VERSION);
85     printf("Character encoding support: ");
86     #if HAVE_ICONV
87     printf("iconv\n");
88     #elif HAVE_MULTIBYTETOWIDECHAR
89     printf("MultiByteToWideChar\n");
90     #else
91     printf("none\n");
92     #endif
93     exit(EXIT_SUCCESS);
94     }
95    
96 siliconforks 106 size_t addst(size_t x, size_t y) {
97     if (SIZE_MAX - x < y) {
98     fatal("integer overflow");
99     }
100     return x + y;
101     }
102    
103     size_t mulst(size_t x, size_t y) {
104     if (x == 0 || y == 0) {
105     return 0;
106     }
107     if (SIZE_MAX / x < y) {
108     fatal("integer overflow");
109     }
110     return x * y;
111     }
112    
113 siliconforks 2 void * xmalloc(size_t size) {
114     void * result = malloc(size);
115     if (result == NULL) {
116     fatal("out of memory");
117     }
118     return result;
119     }
120    
121 siliconforks 91 void * xrealloc(void * p, size_t size) {
122     void * result = realloc(p, size);
123     if (result == NULL) {
124     fatal("out of memory");
125     }
126     return result;
127     }
128    
129 siliconforks 2 char * xstrdup(const char * s) {
130     char * result = strdup(s);
131     if (result == NULL) {
132     fatal("out of memory");
133     }
134     return result;
135     }
136    
137 siliconforks 106 char * xstrndup(const char * s, size_t size) {
138     char * result = strndup(s, size);
139     if (result == NULL) {
140     fatal("out of memory");
141     }
142     return result;
143     }
144    
145     int xasprintf(char ** s, const char * template, ...) {
146     va_list a;
147     va_start(a, template);
148     int result = vasprintf(s, template, a);
149     va_end(a);
150     if (result < 0) {
151     fatal("out of memory");
152     }
153     return result;
154     }
155    
156 siliconforks 2 char * xgetcwd(void) {
157     char * result = getcwd(NULL, 0);
158     if (result == NULL) {
159     fatal("out of memory");
160     }
161     return result;
162     }
163    
164     FILE * xfopen(const char * file, const char * mode) {
165     FILE * result = fopen(file, mode);
166     if (result == NULL) {
167     fatal("cannot open file: %s", file);
168     }
169     return result;
170     }
171    
172     DIR * xopendir(const char * directory) {
173     DIR * result = opendir(directory);
174     if (result == NULL) {
175     fatal("cannot open directory: %s", directory);
176     }
177     return result;
178     }
179    
180     void xlstat(const char * file, struct stat * buf) {
181     #ifdef _WIN32
182     return xstat(file, buf);
183     #else
184     if (lstat(file, buf) == -1) {
185     fatal("cannot stat file: %s", file);
186     }
187     #endif
188     }
189    
190     void xstat(const char * file, struct stat * buf) {
191     if (stat(file, buf) == -1) {
192     fatal("cannot stat file: %s", file);
193     }
194     }
195    
196     void xmkdir(const char * directory) {
197     int result;
198     #ifdef _WIN32
199     result = mkdir(directory);
200     #else
201     result = mkdir(directory, 0755);
202     #endif
203     if (result == -1) {
204     fatal("cannot create directory: %s", directory);
205     }
206     }
207    
208     void mkdir_if_necessary(const char * directory) {
209     struct stat buf;
210     if (stat(directory, &buf) == 0) {
211     if (! S_ISDIR(buf.st_mode)) {
212     fatal("not a directory: %s", directory);
213     }
214     }
215     else {
216     if (errno == ENOENT) {
217     xmkdir(directory);
218     }
219     else {
220     fatal("cannot stat directory: %s", directory);
221     }
222     }
223     }
224    
225     void mkdirs(const char * directory) {
226     char * d = xmalloc(strlen(directory) + 1);
227     for (const char * p = directory; *p != '\0'; p++) {
228     if (*p == '/' && p > directory) {
229     strncpy(d, directory, p - directory);
230     d[p - directory] = '\0';
231     mkdir_if_necessary(d);
232     }
233     }
234     mkdir_if_necessary(directory);
235     free(d);
236     }
237    
238     void xchdir(const char * directory) {
239     if (chdir(directory) == -1) {
240     fatal("cannot change directory: %s", directory);
241     }
242     }
243    
244 siliconforks 106 bool str_starts_with(const char * string, const char * prefix) {
245     const char * string_ptr = string;
246     const char * prefix_ptr = prefix;
247     while (*string_ptr != '\0' && *prefix_ptr != '\0') {
248     if (*string_ptr != *prefix_ptr) {
249     return false;
250     }
251     string_ptr++;
252     prefix_ptr++;
253     }
254     if (*string_ptr == '\0' && *prefix_ptr != '\0') {
255     return false;
256     }
257     return true;
258     }
259    
260     bool str_ends_with(const char * string, const char * suffix) {
261     size_t string_length = strlen(string);
262     size_t suffix_length = strlen(suffix);
263     if (string_length < suffix_length) {
264     return false;
265     }
266     return strcmp(string + string_length - suffix_length, suffix) == 0;
267     }
268    
269 siliconforks 2 char * make_path(const char * parent, const char * relative_path) {
270     size_t parent_length = strlen(parent);
271     size_t relative_path_length = strlen(relative_path);
272 siliconforks 106 size_t result_length = addst(parent_length, relative_path_length);
273     result_length = addst(result_length, 2);
274     char * result = xmalloc(result_length);
275 siliconforks 2 strcpy(result, parent);
276     result[parent_length] = '/';
277     strcpy(result + parent_length + 1, relative_path);
278     return result;
279     }
280    
281     char * make_canonical_path(const char * relative_path) {
282     char * original_directory = xgetcwd();
283     char * base = make_basename(relative_path);
284     char * dir = make_dirname(relative_path);
285    
286     xchdir(dir);
287     char * canonical_dir = xgetcwd();
288     char * result = make_path(canonical_dir, base);
289    
290     free(canonical_dir);
291     free(base);
292     free(dir);
293     xchdir(original_directory);
294     free(original_directory);
295    
296     return result;
297     }
298    
299     char * make_basename(const char * path) {
300     char * copy = xstrdup(path);
301     char * result = xstrdup(basename(copy));
302     free(copy);
303     return result;
304     }
305    
306     char * make_dirname(const char * path) {
307     char * copy = xstrdup(path);
308     char * result = xstrdup(dirname(copy));
309     free(copy);
310     return result;
311     }
312    
313     int is_same_file(const char * file1, const char * file2) {
314     #ifdef _WIN32
315     #define FILECMP strcasecmp
316     #else
317     #define FILECMP strcmp
318     #endif
319     if (FILECMP(file1, file2) == 0) {
320     return 1;
321     }
322    
323     char * canonical1 = make_canonical_path(file1);
324     char * canonical2 = make_canonical_path(file2);
325     int cmp = FILECMP(canonical1, canonical2);
326     free(canonical1);
327     free(canonical2);
328     if (cmp == 0) {
329     return 1;
330     }
331    
332     #ifndef _WIN32
333     struct stat buf1;
334     if (stat(file1, &buf1) == -1) {
335     if (errno == ENOENT) {
336     return 0;
337     }
338     else {
339     fatal("cannot stat file: %s", file1);
340     }
341     }
342     struct stat buf2;
343     if (stat(file2, &buf2) == -1) {
344     if (errno == ENOENT) {
345     return 0;
346     }
347     else {
348     fatal("cannot stat file: %s", file2);
349     }
350     }
351     if (buf1.st_dev == buf2.st_dev &&
352     buf1.st_ino == buf2.st_ino) {
353     return 1;
354     }
355     #endif
356     return 0;
357     #undef FILECMP
358     }
359    
360     int contains_file(const char * file1, const char * file2) {
361     int result = 0;
362     char * ancestor = make_canonical_path(file1);
363     char * d = make_canonical_path(file2);
364     char * parent = make_dirname(d);
365     while (strcmp(d, parent) != 0) {
366     if (is_same_file(ancestor, parent)) {
367     result = 1;
368     break;
369     }
370     free(d);
371     d = parent;
372     parent = make_dirname(d);
373     }
374     free(d);
375     free(parent);
376     free(ancestor);
377     return result;
378     }
379    
380     void copy_stream(FILE * source, FILE * destination) {
381     unsigned char buffer[8192];
382     for (;;) {
383     int bytes_read = fread(buffer, 1, sizeof(buffer), source);
384     if (bytes_read == 0) {
385     break;
386     }
387     fwrite(buffer, 1, bytes_read, destination);
388     }
389     }
390    
391     void copy_file(const char * source_file, const char * destination_file) {
392     FILE * source = xfopen(source_file, "rb");
393     FILE * destination = xfopen(destination_file, "wb");
394    
395     copy_stream(source, destination);
396    
397 siliconforks 359 #ifndef _WIN32
398     /* copy permissions */
399     struct stat buf;
400     if (fstat(fileno(source), &buf) == -1) {
401     fatal("cannot stat file: %s", source_file);
402     }
403     fchmod(fileno(destination), buf.st_mode);
404     #endif
405    
406 siliconforks 2 fclose(source);
407     fclose(destination);
408     }
409    
410 siliconforks 106 bool directory_is_empty(const char * directory) {
411     bool result = true;
412 siliconforks 2 DIR * dir = xopendir(directory);
413     struct dirent * e;
414     while ((e = readdir(dir)) != NULL) {
415     if (strcmp(e->d_name, ".") != 0 &&
416     strcmp(e->d_name, "..") != 0) {
417 siliconforks 106 result = false;
418     break;
419 siliconforks 2 }
420     }
421     closedir(dir);
422 siliconforks 106 return result;
423 siliconforks 2 }
424    
425     static struct DirListEntry * recursive_dir_list(const char * root, const char * directory_wrt_root, struct DirListEntry * head) {
426     char * directory = directory_wrt_root == NULL? xstrdup(root): make_path(root, directory_wrt_root);
427     DIR * dir = xopendir(directory);
428     struct dirent * e;
429     while ((e = readdir(dir)) != NULL) {
430     if (strcmp(e->d_name, ".") == 0 ||
431     strcmp(e->d_name, "..") == 0) {
432     continue;
433     }
434     char * entry = make_path(directory, e->d_name);
435     char * entry_wrt_root = directory_wrt_root == NULL? xstrdup(e->d_name): make_path(directory_wrt_root, e->d_name);
436     struct stat buf;
437     xlstat(entry, &buf);
438     if (S_ISREG(buf.st_mode)) {
439     struct DirListEntry * p = xmalloc(sizeof(struct DirListEntry));
440     p->name = entry_wrt_root;
441     p->next = head;
442     head = p;
443     }
444     else if (S_ISDIR(buf.st_mode)) {
445     head = recursive_dir_list(root, entry_wrt_root, head);
446     free(entry_wrt_root);
447     }
448 siliconforks 364 #ifndef _WIN32
449 siliconforks 359 else if (S_ISLNK(buf.st_mode)) {
450     /* check what it points to */
451     xstat(entry, &buf);
452     if (S_ISREG(buf.st_mode)) {
453     struct DirListEntry * p = xmalloc(sizeof(struct DirListEntry));
454     p->name = entry_wrt_root;
455     p->next = head;
456     head = p;
457     }
458     else {
459     fatal("refusing to follow symbolic link: %s", entry);
460     }
461     }
462 siliconforks 364 #endif
463 siliconforks 2 else {
464     fatal("unknown file type: %s", entry);
465     }
466     free(entry);
467     }
468     closedir(dir);
469     free(directory);
470     return head;
471     }
472    
473     struct DirListEntry * make_recursive_dir_list(const char * directory) {
474     return recursive_dir_list(directory, NULL, NULL);
475     }
476    
477     void free_dir_list(struct DirListEntry * list) {
478     while (list != NULL) {
479     struct DirListEntry * next = list->next;
480     free(list->name);
481     free(list);
482     list = next;
483     }
484     }
485 siliconforks 99
486 siliconforks 125 #ifndef HAVE_STRNDUP
487     char * strndup(const char * s, size_t size) {
488     size_t length = strlen(s);
489     if (length > size) {
490     char * result = xmalloc(size + 1);
491     strncpy(result, s, size);
492     result[size] = '\0';
493     return result;
494     }
495     else {
496     char * result = xmalloc(length + 1);
497     strcpy(result, s);
498     return result;
499     }
500 siliconforks 106 }
501     #endif
502    
503 siliconforks 99 #ifndef HAVE_VASPRINTF
504     int vasprintf(char ** s, const char * template, va_list a) {
505     int size = 100;
506     *s = malloc(size);
507     if (*s == NULL) {
508     return -1;
509     }
510    
511     va_list copy;
512     va_copy(copy, a);
513     int result = vsnprintf(*s, size, template, copy);
514     if (result >= size) {
515     int new_size = result;
516     if (new_size == INT_MAX) {
517     free(*s);
518 siliconforks 106 return -1;
519 siliconforks 99 }
520     new_size++;
521     char * new_s = realloc(*s, new_size);
522     if (new_s == NULL) {
523     free(*s);
524     return -1;
525     }
526     *s = new_s;
527     size = new_size;
528     va_copy(copy, a);
529     result = vsnprintf(*s, size, template, copy);
530     assert(result == size - 1);
531     }
532     else if (result == -1) {
533     while (result == -1) {
534 siliconforks 106 if (size == INT_MAX) {
535 siliconforks 99 free(*s);
536 siliconforks 106 return -1;
537 siliconforks 99 }
538 siliconforks 106 int new_size;
539     if (size > INT_MAX / 2) {
540     new_size = INT_MAX;
541     }
542     else {
543     new_size = 2 * size;
544     }
545 siliconforks 99 char * new_s = realloc(*s, new_size);
546     if (new_s == NULL) {
547     free(*s);
548     return -1;
549     }
550     *s = new_s;
551     size = new_size;
552     va_copy(copy, a);
553     result = vsnprintf(*s, size, template, copy);
554     }
555     assert(result <= size - 1);
556     }
557    
558     return result;
559     }
560     #endif
561    
562     #ifndef HAVE_ASPRINTF
563     int asprintf(char ** s, const char * template, ...) {
564     va_list a;
565     va_start(a, template);
566     int result = vasprintf(s, template, a);
567     va_end(a);
568     return result;
569     }
570     #endif

  ViewVC Help
Powered by ViewVC 1.1.24