1 /*
2 util.h - utility functions
3 Copyright (C) 2016-2020, Przemyslaw Skibinski, Yann Collet
4
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 #ifndef UTIL_H_MODULE
21 #define UTIL_H_MODULE
22
23 #if defined (__cplusplus)
24 extern "C" {
25 #endif
26
27
28
29 /*-****************************************
30 * Dependencies
31 ******************************************/
32 #include "platform.h" /* PLATFORM_POSIX_VERSION */
33 #include <stddef.h> /* size_t, ptrdiff_t */
34 #include <stdlib.h> /* malloc */
35 #include <string.h> /* strlen, strncpy */
36 #include <stdio.h> /* fprintf, fileno */
37 #include <assert.h>
38 #include <sys/types.h> /* stat, utime */
39 #include <sys/stat.h> /* stat */
40 #if defined(_WIN32)
41 # include <sys/utime.h> /* utime */
42 # include <io.h> /* _chmod */
43 #else
44 # include <unistd.h> /* chown, stat */
45 # if PLATFORM_POSIX_VERSION < 200809L
46 # include <utime.h> /* utime */
47 # else
48 # include <fcntl.h> /* AT_FDCWD */
49 # include <sys/stat.h> /* for utimensat */
50 # endif
51 #endif
52 #include <time.h> /* time */
53 #include <limits.h> /* INT_MAX */
54 #include <errno.h>
55
56
57
58 /*-**************************************************************
59 * Basic Types
60 *****************************************************************/
61 #if !defined (__VMS) && (defined (__cplusplus) || (defined (__STDC_VERSION__) && (__STDC_VERSION__ >= 199901L) /* C99 */) )
62 # include <stdint.h>
63 typedef uint8_t BYTE;
64 typedef uint16_t U16;
65 typedef int16_t S16;
66 typedef uint32_t U32;
67 typedef int32_t S32;
68 typedef uint64_t U64;
69 typedef int64_t S64;
70 #else
71 typedef unsigned char BYTE;
72 typedef unsigned short U16;
73 typedef signed short S16;
74 typedef unsigned int U32;
75 typedef signed int S32;
76 typedef unsigned long long U64;
77 typedef signed long long S64;
78 #endif
79
80
81 /* ************************************************************
82 * Avoid fseek()'s 2GiB barrier with MSVC, MacOS, *BSD, MinGW
83 ***************************************************************/
84 #if defined(_MSC_VER) && (_MSC_VER >= 1400)
85 # define UTIL_fseek _fseeki64
86 #elif !defined(__64BIT__) && (PLATFORM_POSIX_VERSION >= 200112L) /* No point defining Large file for 64 bit */
87 # define UTIL_fseek fseeko
88 #elif defined(__MINGW32__) && defined(__MSVCRT__) && !defined(__STRICT_ANSI__) && !defined(__NO_MINGW_LFS)
89 # define UTIL_fseek fseeko64
90 #else
91 # define UTIL_fseek fseek
92 #endif
93
94
95 /*-****************************************
96 * Sleep functions: Windows - Posix - others
97 ******************************************/
98 #if defined(_WIN32)
99 # include <windows.h>
100 # define SET_REALTIME_PRIORITY SetPriorityClass(GetCurrentProcess(), REALTIME_PRIORITY_CLASS)
101 # define UTIL_sleep(s) Sleep(1000*s)
102 # define UTIL_sleepMilli(milli) Sleep(milli)
103 #elif PLATFORM_POSIX_VERSION >= 0 /* Unix-like operating system */
104 # include <unistd.h>
105 # include <sys/resource.h> /* setpriority */
106 # include <time.h> /* clock_t, nanosleep, clock, CLOCKS_PER_SEC */
107 # if defined(PRIO_PROCESS)
108 # define SET_REALTIME_PRIORITY setpriority(PRIO_PROCESS, 0, -20)
109 # else
110 # define SET_REALTIME_PRIORITY /* disabled */
111 # endif
112 # define UTIL_sleep(s) sleep(s)
113 # if (defined(__linux__) && (PLATFORM_POSIX_VERSION >= 199309L)) || (PLATFORM_POSIX_VERSION >= 200112L) /* nanosleep requires POSIX.1-2001 */
114 # define UTIL_sleepMilli(milli) { struct timespec t; t.tv_sec=0; t.tv_nsec=milli*1000000ULL; nanosleep(&t, NULL); }
115 # else
116 # define UTIL_sleepMilli(milli) /* disabled */
117 # endif
118 #else
119 # define SET_REALTIME_PRIORITY /* disabled */
120 # define UTIL_sleep(s) /* disabled */
121 # define UTIL_sleepMilli(milli) /* disabled */
122 #endif
123
124
125 /*-****************************************
126 * stat() functions
127 ******************************************/
128 #if defined(_MSC_VER)
129 # define UTIL_TYPE_stat __stat64
130 # define UTIL_stat _stat64
131 # define UTIL_fstat _fstat64
132 # define UTIL_STAT_MODE_ISREG(st_mode) ((st_mode) & S_IFREG)
133 #elif defined(__MINGW32__) && defined (__MSVCRT__)
134 # define UTIL_TYPE_stat _stati64
135 # define UTIL_stat _stati64
136 # define UTIL_fstat _fstati64
137 # define UTIL_STAT_MODE_ISREG(st_mode) ((st_mode) & S_IFREG)
138 #else
139 # define UTIL_TYPE_stat stat
140 # define UTIL_stat stat
141 # define UTIL_fstat fstat
142 # define UTIL_STAT_MODE_ISREG(st_mode) (S_ISREG(st_mode))
143 #endif
144
145
146 /*-****************************************
147 * fileno() function
148 ******************************************/
149 #if defined(_MSC_VER)
150 # define UTIL_fileno _fileno
151 #else
152 # define UTIL_fileno fileno
153 #endif
154
155 /* *************************************
156 * Constants
157 ***************************************/
158 #define LIST_SIZE_INCREASE (8*1024)
159
160
161 /*-****************************************
162 * Compiler specifics
163 ******************************************/
164 #if defined(__INTEL_COMPILER)
165 # pragma warning(disable : 177) /* disable: message #177: function was declared but never referenced, useful with UTIL_STATIC */
166 #endif
167 #if defined(__GNUC__)
168 # define UTIL_STATIC static __attribute__((unused))
169 #elif defined (__cplusplus) || (defined (__STDC_VERSION__) && (__STDC_VERSION__ >= 199901L) /* C99 */)
170 # define UTIL_STATIC static inline
171 #elif defined(_MSC_VER)
172 # define UTIL_STATIC static __inline
173 #else
174 # define UTIL_STATIC static /* this version may generate warnings for unused static functions; disable the relevant warning */
175 #endif
176
177
178
179 /*-****************************************
180 * Allocation functions
181 ******************************************/
182 /*
183 * A modified version of realloc().
184 * If UTIL_realloc() fails the original block is freed.
185 */
UTIL_realloc(void * ptr,size_t size)186 UTIL_STATIC void* UTIL_realloc(void* ptr, size_t size)
187 {
188 void* const newptr = realloc(ptr, size);
189 if (newptr) return newptr;
190 free(ptr);
191 return NULL;
192 }
193
194
195 /*-****************************************
196 * String functions
197 ******************************************/
198 /*
199 * A modified version of realloc().
200 * If UTIL_realloc() fails the original block is freed.
201 */
UTIL_sameString(const char * a,const char * b)202 UTIL_STATIC int UTIL_sameString(const char* a, const char* b)
203 {
204 assert(a!=NULL && b!=NULL); /* unsupported scenario */
205 if (a==NULL) return 0;
206 if (b==NULL) return 0;
207 return !strcmp(a,b);
208 }
209
210
211 /*-****************************************
212 * Time functions
213 ******************************************/
214 #if defined(_WIN32) /* Windows */
215
216 typedef LARGE_INTEGER UTIL_time_t;
UTIL_getTime(void)217 UTIL_STATIC UTIL_time_t UTIL_getTime(void) { UTIL_time_t x; QueryPerformanceCounter(&x); return x; }
UTIL_getSpanTimeMicro(UTIL_time_t clockStart,UTIL_time_t clockEnd)218 UTIL_STATIC U64 UTIL_getSpanTimeMicro(UTIL_time_t clockStart, UTIL_time_t clockEnd)
219 {
220 static LARGE_INTEGER ticksPerSecond;
221 static int init = 0;
222 if (!init) {
223 if (!QueryPerformanceFrequency(&ticksPerSecond))
224 fprintf(stderr, "ERROR: QueryPerformanceFrequency() failure\n");
225 init = 1;
226 }
227 return 1000000ULL*(clockEnd.QuadPart - clockStart.QuadPart)/ticksPerSecond.QuadPart;
228 }
UTIL_getSpanTimeNano(UTIL_time_t clockStart,UTIL_time_t clockEnd)229 UTIL_STATIC U64 UTIL_getSpanTimeNano(UTIL_time_t clockStart, UTIL_time_t clockEnd)
230 {
231 static LARGE_INTEGER ticksPerSecond;
232 static int init = 0;
233 if (!init) {
234 if (!QueryPerformanceFrequency(&ticksPerSecond))
235 fprintf(stderr, "ERROR: QueryPerformanceFrequency() failure\n");
236 init = 1;
237 }
238 return 1000000000ULL*(clockEnd.QuadPart - clockStart.QuadPart)/ticksPerSecond.QuadPart;
239 }
240
241 #elif defined(__APPLE__) && defined(__MACH__)
242
243 #include <mach/mach_time.h>
244 typedef U64 UTIL_time_t;
UTIL_getTime(void)245 UTIL_STATIC UTIL_time_t UTIL_getTime(void) { return mach_absolute_time(); }
UTIL_getSpanTimeMicro(UTIL_time_t clockStart,UTIL_time_t clockEnd)246 UTIL_STATIC U64 UTIL_getSpanTimeMicro(UTIL_time_t clockStart, UTIL_time_t clockEnd)
247 {
248 static mach_timebase_info_data_t rate;
249 static int init = 0;
250 if (!init) {
251 mach_timebase_info(&rate);
252 init = 1;
253 }
254 return (((clockEnd - clockStart) * (U64)rate.numer) / ((U64)rate.denom)) / 1000ULL;
255 }
UTIL_getSpanTimeNano(UTIL_time_t clockStart,UTIL_time_t clockEnd)256 UTIL_STATIC U64 UTIL_getSpanTimeNano(UTIL_time_t clockStart, UTIL_time_t clockEnd)
257 {
258 static mach_timebase_info_data_t rate;
259 static int init = 0;
260 if (!init) {
261 mach_timebase_info(&rate);
262 init = 1;
263 }
264 return ((clockEnd - clockStart) * (U64)rate.numer) / ((U64)rate.denom);
265 }
266
267 #elif (PLATFORM_POSIX_VERSION >= 200112L) && (defined __UCLIBC__ || (defined(__GLIBC__) && ((__GLIBC__ == 2 && __GLIBC_MINOR__ >= 17) || __GLIBC__ > 2) ) )
268
269 #include <time.h>
270 typedef struct timespec UTIL_time_t;
UTIL_getTime(void)271 UTIL_STATIC UTIL_time_t UTIL_getTime(void)
272 {
273 UTIL_time_t now;
274 if (clock_gettime(CLOCK_MONOTONIC, &now))
275 fprintf(stderr, "ERROR: Failed to get time\n"); /* we could also exit() */
276 return now;
277 }
UTIL_getSpanTime(UTIL_time_t begin,UTIL_time_t end)278 UTIL_STATIC UTIL_time_t UTIL_getSpanTime(UTIL_time_t begin, UTIL_time_t end)
279 {
280 UTIL_time_t diff;
281 if (end.tv_nsec < begin.tv_nsec) {
282 diff.tv_sec = (end.tv_sec - 1) - begin.tv_sec;
283 diff.tv_nsec = (end.tv_nsec + 1000000000ULL) - begin.tv_nsec;
284 } else {
285 diff.tv_sec = end.tv_sec - begin.tv_sec;
286 diff.tv_nsec = end.tv_nsec - begin.tv_nsec;
287 }
288 return diff;
289 }
UTIL_getSpanTimeMicro(UTIL_time_t begin,UTIL_time_t end)290 UTIL_STATIC U64 UTIL_getSpanTimeMicro(UTIL_time_t begin, UTIL_time_t end)
291 {
292 UTIL_time_t const diff = UTIL_getSpanTime(begin, end);
293 U64 micro = 0;
294 micro += 1000000ULL * diff.tv_sec;
295 micro += diff.tv_nsec / 1000ULL;
296 return micro;
297 }
UTIL_getSpanTimeNano(UTIL_time_t begin,UTIL_time_t end)298 UTIL_STATIC U64 UTIL_getSpanTimeNano(UTIL_time_t begin, UTIL_time_t end)
299 {
300 UTIL_time_t const diff = UTIL_getSpanTime(begin, end);
301 U64 nano = 0;
302 nano += 1000000000ULL * diff.tv_sec;
303 nano += diff.tv_nsec;
304 return nano;
305 }
306
307 #else /* relies on standard C (note : clock_t measurements can be wrong when using multi-threading) */
308
309 typedef clock_t UTIL_time_t;
UTIL_getTime(void)310 UTIL_STATIC UTIL_time_t UTIL_getTime(void) { return clock(); }
UTIL_getSpanTimeMicro(UTIL_time_t clockStart,UTIL_time_t clockEnd)311 UTIL_STATIC U64 UTIL_getSpanTimeMicro(UTIL_time_t clockStart, UTIL_time_t clockEnd) { return 1000000ULL * (clockEnd - clockStart) / CLOCKS_PER_SEC; }
UTIL_getSpanTimeNano(UTIL_time_t clockStart,UTIL_time_t clockEnd)312 UTIL_STATIC U64 UTIL_getSpanTimeNano(UTIL_time_t clockStart, UTIL_time_t clockEnd) { return 1000000000ULL * (clockEnd - clockStart) / CLOCKS_PER_SEC; }
313 #endif
314
315
316 /* returns time span in microseconds */
UTIL_clockSpanMicro(UTIL_time_t clockStart)317 UTIL_STATIC U64 UTIL_clockSpanMicro(UTIL_time_t clockStart)
318 {
319 UTIL_time_t const clockEnd = UTIL_getTime();
320 return UTIL_getSpanTimeMicro(clockStart, clockEnd);
321 }
322
323 /* returns time span in nanoseconds */
UTIL_clockSpanNano(UTIL_time_t clockStart)324 UTIL_STATIC U64 UTIL_clockSpanNano(UTIL_time_t clockStart)
325 {
326 UTIL_time_t const clockEnd = UTIL_getTime();
327 return UTIL_getSpanTimeNano(clockStart, clockEnd);
328 }
329
UTIL_waitForNextTick(void)330 UTIL_STATIC void UTIL_waitForNextTick(void)
331 {
332 UTIL_time_t const clockStart = UTIL_getTime();
333 UTIL_time_t clockEnd;
334 do {
335 clockEnd = UTIL_getTime();
336 } while (UTIL_getSpanTimeNano(clockStart, clockEnd) == 0);
337 }
338
339
340
341 /*-****************************************
342 * File functions
343 ******************************************/
344 #if defined(_MSC_VER)
345 #define chmod _chmod
346 typedef struct __stat64 stat_t;
347 #else
348 typedef struct stat stat_t;
349 #endif
350
351
352 UTIL_STATIC int UTIL_isRegFile(const char* infilename);
353 UTIL_STATIC int UTIL_isRegFD(int fd);
354
355
UTIL_setFileStat(const char * filename,stat_t * statbuf)356 UTIL_STATIC int UTIL_setFileStat(const char *filename, stat_t *statbuf)
357 {
358 int res = 0;
359
360 if (!UTIL_isRegFile(filename))
361 return -1;
362
363 {
364 #if defined(_WIN32) || (PLATFORM_POSIX_VERSION < 200809L)
365 struct utimbuf timebuf;
366 timebuf.actime = time(NULL);
367 timebuf.modtime = statbuf->st_mtime;
368 res += utime(filename, &timebuf); /* set access and modification times */
369 #else
370 struct timespec timebuf[2];
371 memset(timebuf, 0, sizeof(timebuf));
372 timebuf[0].tv_nsec = UTIME_NOW;
373 timebuf[1].tv_sec = statbuf->st_mtime;
374 res += utimensat(AT_FDCWD, filename, timebuf, 0); /* set access and modification times */
375 #endif
376 }
377
378 #if !defined(_WIN32)
379 res += chown(filename, statbuf->st_uid, statbuf->st_gid); /* Copy ownership */
380 #endif
381
382 res += chmod(filename, statbuf->st_mode & 07777); /* Copy file permissions */
383
384 errno = 0;
385 return -res; /* number of errors is returned */
386 }
387
388
UTIL_getFDStat(int fd,stat_t * statbuf)389 UTIL_STATIC int UTIL_getFDStat(int fd, stat_t *statbuf)
390 {
391 int r;
392 #if defined(_MSC_VER)
393 r = _fstat64(fd, statbuf);
394 if (r || !(statbuf->st_mode & S_IFREG)) return 0; /* No good... */
395 #else
396 r = fstat(fd, statbuf);
397 if (r || !S_ISREG(statbuf->st_mode)) return 0; /* No good... */
398 #endif
399 return 1;
400 }
401
UTIL_getFileStat(const char * infilename,stat_t * statbuf)402 UTIL_STATIC int UTIL_getFileStat(const char* infilename, stat_t *statbuf)
403 {
404 int r;
405 #if defined(_MSC_VER)
406 r = _stat64(infilename, statbuf);
407 if (r || !(statbuf->st_mode & S_IFREG)) return 0; /* No good... */
408 #else
409 r = stat(infilename, statbuf);
410 if (r || !S_ISREG(statbuf->st_mode)) return 0; /* No good... */
411 #endif
412 return 1;
413 }
414
415
UTIL_isRegFD(int fd)416 UTIL_STATIC int UTIL_isRegFD(int fd)
417 {
418 stat_t statbuf;
419 #ifdef _WIN32
420 /* Windows runtime library always open file descriptors 0, 1 and 2 in text mode, therefore we can't use them for binary I/O */
421 if(fd < 3) return 0;
422 #endif
423 return UTIL_getFDStat(fd, &statbuf); /* Only need to know whether it is a regular file */
424 }
425
426
UTIL_isRegFile(const char * infilename)427 UTIL_STATIC int UTIL_isRegFile(const char* infilename)
428 {
429 stat_t statbuf;
430 return UTIL_getFileStat(infilename, &statbuf); /* Only need to know whether it is a regular file */
431 }
432
433
UTIL_isDirectory(const char * infilename)434 UTIL_STATIC U32 UTIL_isDirectory(const char* infilename)
435 {
436 int r;
437 stat_t statbuf;
438 #if defined(_MSC_VER)
439 r = _stat64(infilename, &statbuf);
440 if (!r && (statbuf.st_mode & _S_IFDIR)) return 1;
441 #else
442 r = stat(infilename, &statbuf);
443 if (!r && S_ISDIR(statbuf.st_mode)) return 1;
444 #endif
445 return 0;
446 }
447
448
UTIL_getOpenFileSize(FILE * file)449 UTIL_STATIC U64 UTIL_getOpenFileSize(FILE* file)
450 {
451 int r;
452 int fd;
453 struct UTIL_TYPE_stat statbuf;
454
455 fd = UTIL_fileno(file);
456 if (fd < 0) {
457 perror("fileno");
458 exit(1);
459 }
460 r = UTIL_fstat(fd, &statbuf);
461 if (r || !UTIL_STAT_MODE_ISREG(statbuf.st_mode)) return 0; /* No good... */
462 return (U64)statbuf.st_size;
463 }
464
465
UTIL_getFileSize(const char * infilename)466 UTIL_STATIC U64 UTIL_getFileSize(const char* infilename)
467 {
468 int r;
469 struct UTIL_TYPE_stat statbuf;
470
471 r = UTIL_stat(infilename, &statbuf);
472 if (r || !UTIL_STAT_MODE_ISREG(statbuf.st_mode)) return 0; /* No good... */
473 return (U64)statbuf.st_size;
474 }
475
476
UTIL_getTotalFileSize(const char ** fileNamesTable,unsigned nbFiles)477 UTIL_STATIC U64 UTIL_getTotalFileSize(const char** fileNamesTable, unsigned nbFiles)
478 {
479 U64 total = 0;
480 unsigned n;
481 for (n=0; n<nbFiles; n++)
482 total += UTIL_getFileSize(fileNamesTable[n]);
483 return total;
484 }
485
486
487 #ifdef _WIN32
488 # define UTIL_HAS_CREATEFILELIST
489
UTIL_prepareFileList(const char * dirName,char ** bufStart,size_t * pos,char ** bufEnd)490 UTIL_STATIC int UTIL_prepareFileList(const char* dirName, char** bufStart, size_t* pos, char** bufEnd)
491 {
492 char* path;
493 size_t dirLength, nbFiles = 0;
494 WIN32_FIND_DATAA cFile;
495 HANDLE hFile;
496
497 dirLength = strlen(dirName);
498 path = (char*) malloc(dirLength + 3);
499 if (!path) return 0;
500
501 memcpy(path, dirName, dirLength);
502 path[dirLength] = '\\';
503 path[dirLength+1] = '*';
504 path[dirLength+2] = 0;
505
506 hFile=FindFirstFileA(path, &cFile);
507 if (hFile == INVALID_HANDLE_VALUE) {
508 fprintf(stderr, "Cannot open directory '%s'\n", dirName);
509 return 0;
510 }
511 free(path);
512
513 do {
514 size_t pathLength;
515 int const fnameLength = (int)strlen(cFile.cFileName);
516 path = (char*) malloc(dirLength + fnameLength + 2);
517 if (!path) { FindClose(hFile); return 0; }
518 memcpy(path, dirName, dirLength);
519 path[dirLength] = '\\';
520 memcpy(path+dirLength+1, cFile.cFileName, fnameLength);
521 pathLength = dirLength+1+fnameLength;
522 path[pathLength] = 0;
523 if (cFile.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY) {
524 if (strcmp (cFile.cFileName, "..") == 0 ||
525 strcmp (cFile.cFileName, ".") == 0) continue;
526
527 nbFiles += UTIL_prepareFileList(path, bufStart, pos, bufEnd); /* Recursively call "UTIL_prepareFileList" with the new path. */
528 if (*bufStart == NULL) { free(path); FindClose(hFile); return 0; }
529 }
530 else if ((cFile.dwFileAttributes & FILE_ATTRIBUTE_NORMAL) || (cFile.dwFileAttributes & FILE_ATTRIBUTE_ARCHIVE) || (cFile.dwFileAttributes & FILE_ATTRIBUTE_COMPRESSED)) {
531 if (*bufStart + *pos + pathLength >= *bufEnd) {
532 ptrdiff_t newListSize = (*bufEnd - *bufStart) + LIST_SIZE_INCREASE;
533 *bufStart = (char*)UTIL_realloc(*bufStart, newListSize);
534 *bufEnd = *bufStart + newListSize;
535 if (*bufStart == NULL) { free(path); FindClose(hFile); return 0; }
536 }
537 if (*bufStart + *pos + pathLength < *bufEnd) {
538 strncpy(*bufStart + *pos, path, *bufEnd - (*bufStart + *pos));
539 *pos += pathLength + 1;
540 nbFiles++;
541 }
542 }
543 free(path);
544 } while (FindNextFileA(hFile, &cFile));
545
546 FindClose(hFile);
547 assert(nbFiles < INT_MAX);
548 return (int)nbFiles;
549 }
550
551 #elif defined(__linux__) || (PLATFORM_POSIX_VERSION >= 200112L) /* opendir, readdir require POSIX.1-2001 */
552 # define UTIL_HAS_CREATEFILELIST
553 # include <dirent.h> /* opendir, readdir */
554 # include <string.h> /* strerror, memcpy */
555
UTIL_prepareFileList(const char * dirName,char ** bufStart,size_t * pos,char ** bufEnd)556 UTIL_STATIC int UTIL_prepareFileList(const char* dirName, char** bufStart, size_t* pos, char** bufEnd)
557 {
558 DIR* dir;
559 struct dirent * entry;
560 size_t dirLength;
561 int nbFiles = 0;
562
563 if (!(dir = opendir(dirName))) {
564 fprintf(stderr, "Cannot open directory '%s': %s\n", dirName, strerror(errno));
565 return 0;
566 }
567
568 dirLength = strlen(dirName);
569 errno = 0;
570 while ((entry = readdir(dir)) != NULL) {
571 char* path;
572 size_t fnameLength, pathLength;
573 if (strcmp (entry->d_name, "..") == 0 ||
574 strcmp (entry->d_name, ".") == 0) continue;
575 fnameLength = strlen(entry->d_name);
576 path = (char*)malloc(dirLength + fnameLength + 2);
577 if (!path) { closedir(dir); return 0; }
578 memcpy(path, dirName, dirLength);
579 path[dirLength] = '/';
580 memcpy(path+dirLength+1, entry->d_name, fnameLength);
581 pathLength = dirLength+1+fnameLength;
582 path[pathLength] = 0;
583
584 if (UTIL_isDirectory(path)) {
585 nbFiles += UTIL_prepareFileList(path, bufStart, pos, bufEnd); /* Recursively call "UTIL_prepareFileList" with the new path. */
586 if (*bufStart == NULL) { free(path); closedir(dir); return 0; }
587 } else {
588 if (*bufStart + *pos + pathLength >= *bufEnd) {
589 size_t const newListSize = (size_t)(*bufEnd - *bufStart) + LIST_SIZE_INCREASE;
590 *bufStart = (char*)UTIL_realloc(*bufStart, newListSize);
591 *bufEnd = *bufStart + newListSize;
592 if (*bufStart == NULL) { free(path); closedir(dir); return 0; }
593 }
594 if (*bufStart + *pos + pathLength < *bufEnd) {
595 strncpy(*bufStart + *pos, path, *bufEnd - (*bufStart + *pos));
596 *pos += pathLength + 1;
597 nbFiles++;
598 }
599 }
600 free(path);
601 errno = 0; /* clear errno after UTIL_isDirectory, UTIL_prepareFileList */
602 }
603
604 if (errno != 0) {
605 fprintf(stderr, "readdir(%s) error: %s\n", dirName, strerror(errno));
606 free(*bufStart);
607 *bufStart = NULL;
608 }
609 closedir(dir);
610 return nbFiles;
611 }
612
613 #else
614
UTIL_prepareFileList(const char * dirName,char ** bufStart,size_t * pos,char ** bufEnd)615 UTIL_STATIC int UTIL_prepareFileList(const char* dirName, char** bufStart, size_t* pos, char** bufEnd)
616 {
617 (void)bufStart; (void)bufEnd; (void)pos;
618 fprintf(stderr, "Directory %s ignored (compiled without _WIN32 or _POSIX_C_SOURCE)\n", dirName);
619 return 0;
620 }
621
622 #endif /* #ifdef _WIN32 */
623
624 /*
625 * UTIL_createFileList - takes a list of files and directories (params: inputNames, inputNamesNb), scans directories,
626 * and returns a new list of files (params: return value, allocatedBuffer, allocatedNamesNb).
627 * After finishing usage of the list the structures should be freed with UTIL_freeFileList(params: return value, allocatedBuffer)
628 * In case of error UTIL_createFileList returns NULL and UTIL_freeFileList should not be called.
629 */
630 UTIL_STATIC const char**
UTIL_createFileList(const char ** inputNames,unsigned inputNamesNb,char ** allocatedBuffer,unsigned * allocatedNamesNb)631 UTIL_createFileList(const char** inputNames, unsigned inputNamesNb,
632 char** allocatedBuffer, unsigned* allocatedNamesNb)
633 {
634 size_t pos;
635 unsigned i, nbFiles;
636 char* buf = (char*)malloc(LIST_SIZE_INCREASE);
637 size_t bufSize = LIST_SIZE_INCREASE;
638 const char** fileTable;
639
640 if (!buf) return NULL;
641
642 for (i=0, pos=0, nbFiles=0; i<inputNamesNb; i++) {
643 if (!UTIL_isDirectory(inputNames[i])) {
644 size_t const len = strlen(inputNames[i]) + 1; /* include nul char */
645 if (pos + len >= bufSize) {
646 while (pos + len >= bufSize) bufSize += LIST_SIZE_INCREASE;
647 buf = (char*)UTIL_realloc(buf, bufSize);
648 if (!buf) return NULL;
649 }
650 assert(pos + len < bufSize);
651 memcpy(buf + pos, inputNames[i], len);
652 pos += len;
653 nbFiles++;
654 } else {
655 char* bufend = buf + bufSize;
656 nbFiles += (unsigned)UTIL_prepareFileList(inputNames[i], &buf, &pos, &bufend);
657 if (buf == NULL) return NULL;
658 assert(bufend > buf);
659 bufSize = (size_t)(bufend - buf);
660 } }
661
662 if (nbFiles == 0) { free(buf); return NULL; }
663
664 fileTable = (const char**)malloc(((size_t)nbFiles+1) * sizeof(const char*));
665 if (!fileTable) { free(buf); return NULL; }
666
667 for (i=0, pos=0; i<nbFiles; i++) {
668 fileTable[i] = buf + pos;
669 pos += strlen(fileTable[i]) + 1;
670 }
671
672 if (pos > bufSize) {
673 free(buf);
674 free((void*)fileTable);
675 return NULL;
676 } /* can this happen ? */
677
678 *allocatedBuffer = buf;
679 *allocatedNamesNb = nbFiles;
680
681 return fileTable;
682 }
683
684
685 UTIL_STATIC void
UTIL_freeFileList(const char ** filenameTable,char * allocatedBuffer)686 UTIL_freeFileList(const char** filenameTable, char* allocatedBuffer)
687 {
688 free(allocatedBuffer);
689 free((void*)filenameTable);
690 }
691
692
693 #if defined (__cplusplus)
694 }
695 #endif
696
697 #endif /* UTIL_H_MODULE */
698