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 * Time functions
180 ******************************************/
181 #if defined(_WIN32) /* Windows */
182
183 typedef LARGE_INTEGER UTIL_time_t;
UTIL_getTime(void)184 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)185 UTIL_STATIC U64 UTIL_getSpanTimeMicro(UTIL_time_t clockStart, UTIL_time_t clockEnd)
186 {
187 static LARGE_INTEGER ticksPerSecond;
188 static int init = 0;
189 if (!init) {
190 if (!QueryPerformanceFrequency(&ticksPerSecond))
191 fprintf(stderr, "ERROR: QueryPerformanceFrequency() failure\n");
192 init = 1;
193 }
194 return 1000000ULL*(clockEnd.QuadPart - clockStart.QuadPart)/ticksPerSecond.QuadPart;
195 }
UTIL_getSpanTimeNano(UTIL_time_t clockStart,UTIL_time_t clockEnd)196 UTIL_STATIC U64 UTIL_getSpanTimeNano(UTIL_time_t clockStart, UTIL_time_t clockEnd)
197 {
198 static LARGE_INTEGER ticksPerSecond;
199 static int init = 0;
200 if (!init) {
201 if (!QueryPerformanceFrequency(&ticksPerSecond))
202 fprintf(stderr, "ERROR: QueryPerformanceFrequency() failure\n");
203 init = 1;
204 }
205 return 1000000000ULL*(clockEnd.QuadPart - clockStart.QuadPart)/ticksPerSecond.QuadPart;
206 }
207
208 #elif defined(__APPLE__) && defined(__MACH__)
209
210 #include <mach/mach_time.h>
211 typedef U64 UTIL_time_t;
UTIL_getTime(void)212 UTIL_STATIC UTIL_time_t UTIL_getTime(void) { return mach_absolute_time(); }
UTIL_getSpanTimeMicro(UTIL_time_t clockStart,UTIL_time_t clockEnd)213 UTIL_STATIC U64 UTIL_getSpanTimeMicro(UTIL_time_t clockStart, UTIL_time_t clockEnd)
214 {
215 static mach_timebase_info_data_t rate;
216 static int init = 0;
217 if (!init) {
218 mach_timebase_info(&rate);
219 init = 1;
220 }
221 return (((clockEnd - clockStart) * (U64)rate.numer) / ((U64)rate.denom)) / 1000ULL;
222 }
UTIL_getSpanTimeNano(UTIL_time_t clockStart,UTIL_time_t clockEnd)223 UTIL_STATIC U64 UTIL_getSpanTimeNano(UTIL_time_t clockStart, UTIL_time_t clockEnd)
224 {
225 static mach_timebase_info_data_t rate;
226 static int init = 0;
227 if (!init) {
228 mach_timebase_info(&rate);
229 init = 1;
230 }
231 return ((clockEnd - clockStart) * (U64)rate.numer) / ((U64)rate.denom);
232 }
233
234 #elif (PLATFORM_POSIX_VERSION >= 200112L) && (defined __UCLIBC__ || (defined(__GLIBC__) && ((__GLIBC__ == 2 && __GLIBC_MINOR__ >= 17) || __GLIBC__ > 2) ) )
235
236 #include <time.h>
237 typedef struct timespec UTIL_time_t;
UTIL_getTime(void)238 UTIL_STATIC UTIL_time_t UTIL_getTime(void)
239 {
240 UTIL_time_t now;
241 if (clock_gettime(CLOCK_MONOTONIC, &now))
242 fprintf(stderr, "ERROR: Failed to get time\n"); /* we could also exit() */
243 return now;
244 }
UTIL_getSpanTime(UTIL_time_t begin,UTIL_time_t end)245 UTIL_STATIC UTIL_time_t UTIL_getSpanTime(UTIL_time_t begin, UTIL_time_t end)
246 {
247 UTIL_time_t diff;
248 if (end.tv_nsec < begin.tv_nsec) {
249 diff.tv_sec = (end.tv_sec - 1) - begin.tv_sec;
250 diff.tv_nsec = (end.tv_nsec + 1000000000ULL) - begin.tv_nsec;
251 } else {
252 diff.tv_sec = end.tv_sec - begin.tv_sec;
253 diff.tv_nsec = end.tv_nsec - begin.tv_nsec;
254 }
255 return diff;
256 }
UTIL_getSpanTimeMicro(UTIL_time_t begin,UTIL_time_t end)257 UTIL_STATIC U64 UTIL_getSpanTimeMicro(UTIL_time_t begin, UTIL_time_t end)
258 {
259 UTIL_time_t const diff = UTIL_getSpanTime(begin, end);
260 U64 micro = 0;
261 micro += 1000000ULL * diff.tv_sec;
262 micro += diff.tv_nsec / 1000ULL;
263 return micro;
264 }
UTIL_getSpanTimeNano(UTIL_time_t begin,UTIL_time_t end)265 UTIL_STATIC U64 UTIL_getSpanTimeNano(UTIL_time_t begin, UTIL_time_t end)
266 {
267 UTIL_time_t const diff = UTIL_getSpanTime(begin, end);
268 U64 nano = 0;
269 nano += 1000000000ULL * diff.tv_sec;
270 nano += diff.tv_nsec;
271 return nano;
272 }
273
274 #else /* relies on standard C (note : clock_t measurements can be wrong when using multi-threading) */
275
276 typedef clock_t UTIL_time_t;
UTIL_getTime(void)277 UTIL_STATIC UTIL_time_t UTIL_getTime(void) { return clock(); }
UTIL_getSpanTimeMicro(UTIL_time_t clockStart,UTIL_time_t clockEnd)278 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)279 UTIL_STATIC U64 UTIL_getSpanTimeNano(UTIL_time_t clockStart, UTIL_time_t clockEnd) { return 1000000000ULL * (clockEnd - clockStart) / CLOCKS_PER_SEC; }
280 #endif
281
282
283 /* returns time span in microseconds */
UTIL_clockSpanMicro(UTIL_time_t clockStart)284 UTIL_STATIC U64 UTIL_clockSpanMicro(UTIL_time_t clockStart)
285 {
286 UTIL_time_t const clockEnd = UTIL_getTime();
287 return UTIL_getSpanTimeMicro(clockStart, clockEnd);
288 }
289
290 /* returns time span in nanoseconds */
UTIL_clockSpanNano(UTIL_time_t clockStart)291 UTIL_STATIC U64 UTIL_clockSpanNano(UTIL_time_t clockStart)
292 {
293 UTIL_time_t const clockEnd = UTIL_getTime();
294 return UTIL_getSpanTimeNano(clockStart, clockEnd);
295 }
296
UTIL_waitForNextTick(void)297 UTIL_STATIC void UTIL_waitForNextTick(void)
298 {
299 UTIL_time_t const clockStart = UTIL_getTime();
300 UTIL_time_t clockEnd;
301 do {
302 clockEnd = UTIL_getTime();
303 } while (UTIL_getSpanTimeNano(clockStart, clockEnd) == 0);
304 }
305
306
307
308 /*-****************************************
309 * File functions
310 ******************************************/
311 #if defined(_MSC_VER)
312 #define chmod _chmod
313 typedef struct __stat64 stat_t;
314 #else
315 typedef struct stat stat_t;
316 #endif
317
318
319 UTIL_STATIC int UTIL_isRegFile(const char* infilename);
320
321
UTIL_setFileStat(const char * filename,stat_t * statbuf)322 UTIL_STATIC int UTIL_setFileStat(const char *filename, stat_t *statbuf)
323 {
324 int res = 0;
325
326 if (!UTIL_isRegFile(filename))
327 return -1;
328
329 {
330 #if defined(_WIN32) || (PLATFORM_POSIX_VERSION < 200809L)
331 struct utimbuf timebuf;
332 timebuf.actime = time(NULL);
333 timebuf.modtime = statbuf->st_mtime;
334 res += utime(filename, &timebuf); /* set access and modification times */
335 #else
336 struct timespec timebuf[2];
337 memset(timebuf, 0, sizeof(timebuf));
338 timebuf[0].tv_nsec = UTIME_NOW;
339 timebuf[1].tv_sec = statbuf->st_mtime;
340 res += utimensat(AT_FDCWD, filename, timebuf, 0); /* set access and modification times */
341 #endif
342 }
343
344 #if !defined(_WIN32)
345 res += chown(filename, statbuf->st_uid, statbuf->st_gid); /* Copy ownership */
346 #endif
347
348 res += chmod(filename, statbuf->st_mode & 07777); /* Copy file permissions */
349
350 errno = 0;
351 return -res; /* number of errors is returned */
352 }
353
354
UTIL_getFileStat(const char * infilename,stat_t * statbuf)355 UTIL_STATIC int UTIL_getFileStat(const char* infilename, stat_t *statbuf)
356 {
357 int r;
358 #if defined(_MSC_VER)
359 r = _stat64(infilename, statbuf);
360 if (r || !(statbuf->st_mode & S_IFREG)) return 0; /* No good... */
361 #else
362 r = stat(infilename, statbuf);
363 if (r || !S_ISREG(statbuf->st_mode)) return 0; /* No good... */
364 #endif
365 return 1;
366 }
367
368
UTIL_isRegFile(const char * infilename)369 UTIL_STATIC int UTIL_isRegFile(const char* infilename)
370 {
371 stat_t statbuf;
372 return UTIL_getFileStat(infilename, &statbuf); /* Only need to know whether it is a regular file */
373 }
374
375
UTIL_isDirectory(const char * infilename)376 UTIL_STATIC U32 UTIL_isDirectory(const char* infilename)
377 {
378 int r;
379 stat_t statbuf;
380 #if defined(_MSC_VER)
381 r = _stat64(infilename, &statbuf);
382 if (!r && (statbuf.st_mode & _S_IFDIR)) return 1;
383 #else
384 r = stat(infilename, &statbuf);
385 if (!r && S_ISDIR(statbuf.st_mode)) return 1;
386 #endif
387 return 0;
388 }
389
390
UTIL_getOpenFileSize(FILE * file)391 UTIL_STATIC U64 UTIL_getOpenFileSize(FILE* file)
392 {
393 int r;
394 int fd;
395 struct UTIL_TYPE_stat statbuf;
396
397 fd = UTIL_fileno(file);
398 if (fd < 0) {
399 perror("fileno");
400 exit(1);
401 }
402 r = UTIL_fstat(fd, &statbuf);
403 if (r || !UTIL_STAT_MODE_ISREG(statbuf.st_mode)) return 0; /* No good... */
404 return (U64)statbuf.st_size;
405 }
406
407
UTIL_getFileSize(const char * infilename)408 UTIL_STATIC U64 UTIL_getFileSize(const char* infilename)
409 {
410 int r;
411 struct UTIL_TYPE_stat statbuf;
412
413 r = UTIL_stat(infilename, &statbuf);
414 if (r || !UTIL_STAT_MODE_ISREG(statbuf.st_mode)) return 0; /* No good... */
415 return (U64)statbuf.st_size;
416 }
417
418
UTIL_getTotalFileSize(const char ** fileNamesTable,unsigned nbFiles)419 UTIL_STATIC U64 UTIL_getTotalFileSize(const char** fileNamesTable, unsigned nbFiles)
420 {
421 U64 total = 0;
422 unsigned n;
423 for (n=0; n<nbFiles; n++)
424 total += UTIL_getFileSize(fileNamesTable[n]);
425 return total;
426 }
427
428
429 /*
430 * A modified version of realloc().
431 * If UTIL_realloc() fails the original block is freed.
432 */
UTIL_realloc(void * ptr,size_t size)433 UTIL_STATIC void* UTIL_realloc(void* ptr, size_t size)
434 {
435 void* const newptr = realloc(ptr, size);
436 if (newptr) return newptr;
437 free(ptr);
438 return NULL;
439 }
440
441
442 #ifdef _WIN32
443 # define UTIL_HAS_CREATEFILELIST
444
UTIL_prepareFileList(const char * dirName,char ** bufStart,size_t * pos,char ** bufEnd)445 UTIL_STATIC int UTIL_prepareFileList(const char* dirName, char** bufStart, size_t* pos, char** bufEnd)
446 {
447 char* path;
448 size_t dirLength, nbFiles = 0;
449 WIN32_FIND_DATAA cFile;
450 HANDLE hFile;
451
452 dirLength = strlen(dirName);
453 path = (char*) malloc(dirLength + 3);
454 if (!path) return 0;
455
456 memcpy(path, dirName, dirLength);
457 path[dirLength] = '\\';
458 path[dirLength+1] = '*';
459 path[dirLength+2] = 0;
460
461 hFile=FindFirstFileA(path, &cFile);
462 if (hFile == INVALID_HANDLE_VALUE) {
463 fprintf(stderr, "Cannot open directory '%s'\n", dirName);
464 return 0;
465 }
466 free(path);
467
468 do {
469 size_t pathLength;
470 int const fnameLength = (int)strlen(cFile.cFileName);
471 path = (char*) malloc(dirLength + fnameLength + 2);
472 if (!path) { FindClose(hFile); return 0; }
473 memcpy(path, dirName, dirLength);
474 path[dirLength] = '\\';
475 memcpy(path+dirLength+1, cFile.cFileName, fnameLength);
476 pathLength = dirLength+1+fnameLength;
477 path[pathLength] = 0;
478 if (cFile.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY) {
479 if (strcmp (cFile.cFileName, "..") == 0 ||
480 strcmp (cFile.cFileName, ".") == 0) continue;
481
482 nbFiles += UTIL_prepareFileList(path, bufStart, pos, bufEnd); /* Recursively call "UTIL_prepareFileList" with the new path. */
483 if (*bufStart == NULL) { free(path); FindClose(hFile); return 0; }
484 }
485 else if ((cFile.dwFileAttributes & FILE_ATTRIBUTE_NORMAL) || (cFile.dwFileAttributes & FILE_ATTRIBUTE_ARCHIVE) || (cFile.dwFileAttributes & FILE_ATTRIBUTE_COMPRESSED)) {
486 if (*bufStart + *pos + pathLength >= *bufEnd) {
487 ptrdiff_t newListSize = (*bufEnd - *bufStart) + LIST_SIZE_INCREASE;
488 *bufStart = (char*)UTIL_realloc(*bufStart, newListSize);
489 *bufEnd = *bufStart + newListSize;
490 if (*bufStart == NULL) { free(path); FindClose(hFile); return 0; }
491 }
492 if (*bufStart + *pos + pathLength < *bufEnd) {
493 strncpy(*bufStart + *pos, path, *bufEnd - (*bufStart + *pos));
494 *pos += pathLength + 1;
495 nbFiles++;
496 }
497 }
498 free(path);
499 } while (FindNextFileA(hFile, &cFile));
500
501 FindClose(hFile);
502 assert(nbFiles < INT_MAX);
503 return (int)nbFiles;
504 }
505
506 #elif defined(__linux__) || (PLATFORM_POSIX_VERSION >= 200112L) /* opendir, readdir require POSIX.1-2001 */
507 # define UTIL_HAS_CREATEFILELIST
508 # include <dirent.h> /* opendir, readdir */
509 # include <string.h> /* strerror, memcpy */
510
UTIL_prepareFileList(const char * dirName,char ** bufStart,size_t * pos,char ** bufEnd)511 UTIL_STATIC int UTIL_prepareFileList(const char* dirName, char** bufStart, size_t* pos, char** bufEnd)
512 {
513 DIR* dir;
514 struct dirent * entry;
515 size_t dirLength;
516 int nbFiles = 0;
517
518 if (!(dir = opendir(dirName))) {
519 fprintf(stderr, "Cannot open directory '%s': %s\n", dirName, strerror(errno));
520 return 0;
521 }
522
523 dirLength = strlen(dirName);
524 errno = 0;
525 while ((entry = readdir(dir)) != NULL) {
526 char* path;
527 size_t fnameLength, pathLength;
528 if (strcmp (entry->d_name, "..") == 0 ||
529 strcmp (entry->d_name, ".") == 0) continue;
530 fnameLength = strlen(entry->d_name);
531 path = (char*)malloc(dirLength + fnameLength + 2);
532 if (!path) { closedir(dir); return 0; }
533 memcpy(path, dirName, dirLength);
534 path[dirLength] = '/';
535 memcpy(path+dirLength+1, entry->d_name, fnameLength);
536 pathLength = dirLength+1+fnameLength;
537 path[pathLength] = 0;
538
539 if (UTIL_isDirectory(path)) {
540 nbFiles += UTIL_prepareFileList(path, bufStart, pos, bufEnd); /* Recursively call "UTIL_prepareFileList" with the new path. */
541 if (*bufStart == NULL) { free(path); closedir(dir); return 0; }
542 } else {
543 if (*bufStart + *pos + pathLength >= *bufEnd) {
544 size_t const newListSize = (size_t)(*bufEnd - *bufStart) + LIST_SIZE_INCREASE;
545 *bufStart = (char*)UTIL_realloc(*bufStart, newListSize);
546 *bufEnd = *bufStart + newListSize;
547 if (*bufStart == NULL) { free(path); closedir(dir); return 0; }
548 }
549 if (*bufStart + *pos + pathLength < *bufEnd) {
550 strncpy(*bufStart + *pos, path, *bufEnd - (*bufStart + *pos));
551 *pos += pathLength + 1;
552 nbFiles++;
553 }
554 }
555 free(path);
556 errno = 0; /* clear errno after UTIL_isDirectory, UTIL_prepareFileList */
557 }
558
559 if (errno != 0) {
560 fprintf(stderr, "readdir(%s) error: %s\n", dirName, strerror(errno));
561 free(*bufStart);
562 *bufStart = NULL;
563 }
564 closedir(dir);
565 return nbFiles;
566 }
567
568 #else
569
UTIL_prepareFileList(const char * dirName,char ** bufStart,size_t * pos,char ** bufEnd)570 UTIL_STATIC int UTIL_prepareFileList(const char* dirName, char** bufStart, size_t* pos, char** bufEnd)
571 {
572 (void)bufStart; (void)bufEnd; (void)pos;
573 fprintf(stderr, "Directory %s ignored (compiled without _WIN32 or _POSIX_C_SOURCE)\n", dirName);
574 return 0;
575 }
576
577 #endif /* #ifdef _WIN32 */
578
579 /*
580 * UTIL_createFileList - takes a list of files and directories (params: inputNames, inputNamesNb), scans directories,
581 * and returns a new list of files (params: return value, allocatedBuffer, allocatedNamesNb).
582 * After finishing usage of the list the structures should be freed with UTIL_freeFileList(params: return value, allocatedBuffer)
583 * In case of error UTIL_createFileList returns NULL and UTIL_freeFileList should not be called.
584 */
585 UTIL_STATIC const char**
UTIL_createFileList(const char ** inputNames,unsigned inputNamesNb,char ** allocatedBuffer,unsigned * allocatedNamesNb)586 UTIL_createFileList(const char** inputNames, unsigned inputNamesNb,
587 char** allocatedBuffer, unsigned* allocatedNamesNb)
588 {
589 size_t pos;
590 unsigned i, nbFiles;
591 char* buf = (char*)malloc(LIST_SIZE_INCREASE);
592 size_t bufSize = LIST_SIZE_INCREASE;
593 const char** fileTable;
594
595 if (!buf) return NULL;
596
597 for (i=0, pos=0, nbFiles=0; i<inputNamesNb; i++) {
598 if (!UTIL_isDirectory(inputNames[i])) {
599 size_t const len = strlen(inputNames[i]) + 1; /* include nul char */
600 if (pos + len >= bufSize) {
601 while (pos + len >= bufSize) bufSize += LIST_SIZE_INCREASE;
602 buf = (char*)UTIL_realloc(buf, bufSize);
603 if (!buf) return NULL;
604 }
605 assert(pos + len < bufSize);
606 memcpy(buf + pos, inputNames[i], len);
607 pos += len;
608 nbFiles++;
609 } else {
610 char* bufend = buf + bufSize;
611 nbFiles += (unsigned)UTIL_prepareFileList(inputNames[i], &buf, &pos, &bufend);
612 if (buf == NULL) return NULL;
613 assert(bufend > buf);
614 bufSize = (size_t)(bufend - buf);
615 } }
616
617 if (nbFiles == 0) { free(buf); return NULL; }
618
619 fileTable = (const char**)malloc(((size_t)nbFiles+1) * sizeof(const char*));
620 if (!fileTable) { free(buf); return NULL; }
621
622 for (i=0, pos=0; i<nbFiles; i++) {
623 fileTable[i] = buf + pos;
624 pos += strlen(fileTable[i]) + 1;
625 }
626
627 if (pos > bufSize) {
628 free(buf);
629 free((void*)fileTable);
630 return NULL;
631 } /* can this happen ? */
632
633 *allocatedBuffer = buf;
634 *allocatedNamesNb = nbFiles;
635
636 return fileTable;
637 }
638
639
640 UTIL_STATIC void
UTIL_freeFileList(const char ** filenameTable,char * allocatedBuffer)641 UTIL_freeFileList(const char** filenameTable, char* allocatedBuffer)
642 {
643 if (allocatedBuffer) free(allocatedBuffer);
644 if (filenameTable) free((void*)filenameTable);
645 }
646
647
648 #if defined (__cplusplus)
649 }
650 #endif
651
652 #endif /* UTIL_H_MODULE */
653
