X-Git-Url: https://git.wh0rd.org/?a=blobdiff_plain;f=src%2Ffccache.c;h=5012581aa66e6d5bf7f6ee8043766e0e94979c86;hb=d8ab9e6c42cb3513a6623df0c2866e1ebbd96485;hp=45413e0b238c039642877d20b297e17aad9887a0;hpb=ea44e2184198aba956e39ae63a4914544c9719fe;p=fontconfig.git diff --git a/src/fccache.c b/src/fccache.c index 45413e0..5012581 100644 --- a/src/fccache.c +++ b/src/fccache.c @@ -1,6 +1,4 @@ /* - * $RCSId: xc/lib/fontconfig/src/fccache.c,v 1.12 2002/08/22 07:36:44 keithp Exp $ - * * Copyright © 2000 Keith Packard * Copyright © 2005 Patrick Lam * @@ -23,51 +21,23 @@ * PERFORMANCE OF THIS SOFTWARE. */ +#include "fcint.h" +#include "../fc-arch/fcarch.h" +#include #include #include #include -#include -#include #include -#include -#include "fcint.h" -#include - -#define ENDIAN_TEST 0x12345678 -#define MACHINE_SIGNATURE_SIZE 9 + 5*20 + 1 - -static int -FcDirCacheOpen (char * cache_file); - -static char * -FcDirCacheHashName (char * cache_file, int collisions); - -static off_t -FcCacheSkipToArch (int fd, const char * arch, FcBool global); - -static FcBool -FcCacheCopyOld (int fd, int fd_orig, off_t start); - -static void * -FcDirCacheProduce (FcFontSet *set, FcCache * metadata); - -static FcBool -FcDirCacheConsume (int fd, const char * dir, FcFontSet *set); - -FcBool -FcDirCacheRead (FcFontSet * set, FcStrSet * dirs, const FcChar8 *dir); - -static int -FcCacheNextOffset(off_t w); - -static char * -FcCacheMachineSignature (void); - -static FcBool -FcCacheHaveBank (int bank); +#if defined(HAVE_MMAP) || defined(__CYGWIN__) +# include +# include +#elif defined(_WIN32) +# include +#endif -static void -FcCacheAddBankDir (int bank, const char * dir); +#ifndef O_BINARY +#define O_BINARY 0 +#endif struct MD5Context { FcChar32 buf[4]; @@ -80,1176 +50,571 @@ static void MD5Update(struct MD5Context *ctx, unsigned char *buf, unsigned len); static void MD5Final(unsigned char digest[16], struct MD5Context *ctx); static void MD5Transform(FcChar32 buf[4], FcChar32 in[16]); -#define FC_DBG_CACHE_REF 1024 +#define CACHEBASE_LEN (1 + 32 + 1 + sizeof (FC_ARCHITECTURE) + sizeof (FC_CACHE_SUFFIX)) + +static const char bin2hex[] = { '0', '1', '2', '3', + '4', '5', '6', '7', + '8', '9', 'a', 'b', + 'c', 'd', 'e', 'f' }; -static char * -FcCacheReadString (int fd, char *dest, int len) +static FcChar8 * +FcDirCacheBasename (const FcChar8 * dir, FcChar8 cache_base[CACHEBASE_LEN]) { - FcChar8 c; - FcBool escape; - int size; - int i; + unsigned char hash[16]; + FcChar8 *hex_hash; + int cnt; + struct MD5Context ctx; - if (len == 0) - return 0; - - size = len; - i = 0; - escape = FcFalse; - while (read (fd, &c, 1) == 1) + MD5Init (&ctx); + MD5Update (&ctx, (unsigned char *)dir, strlen ((char *) dir)); + + MD5Final (hash, &ctx); + + cache_base[0] = '/'; + hex_hash = cache_base + 1; + for (cnt = 0; cnt < 16; ++cnt) { - if (!escape) - { - switch (c) { - case '"': - c = '\0'; - break; - case '\\': - escape = FcTrue; - continue; - } - } - if (i == size) - { - dest[i++] = 0; - return dest; - } - dest[i++] = c; - if (c == '\0') - return dest; - escape = FcFalse; + hex_hash[2*cnt ] = bin2hex[hash[cnt] >> 4]; + hex_hash[2*cnt+1] = bin2hex[hash[cnt] & 0xf]; } - return 0; + hex_hash[2*cnt] = 0; + strcat ((char *) cache_base, "-" FC_ARCHITECTURE FC_CACHE_SUFFIX); + + return cache_base; } -static void -FcCacheSkipString (int fd) +FcBool +FcDirCacheUnlink (const FcChar8 *dir, FcConfig *config) { - FcChar8 c; - FcBool escape; + FcChar8 *cache_hashed = NULL; + FcChar8 cache_base[CACHEBASE_LEN]; + FcStrList *list; + FcChar8 *cache_dir; - escape = FcFalse; - while (read (fd, &c, 1) == 1) + FcDirCacheBasename (dir, cache_base); + + list = FcStrListCreate (config->cacheDirs); + if (!list) + return FcFalse; + + while ((cache_dir = FcStrListNext (list))) { - if (!escape) - { - switch (c) { - case '"': - c = '\0'; - break; - case '\\': - escape = FcTrue; - continue; - } - } - if (c == '\0') - return; - escape = FcFalse; + cache_hashed = FcStrPlus (cache_dir, cache_base); + if (!cache_hashed) + break; + (void) unlink ((char *) cache_hashed); } - return; -} - -static FcBool -FcCacheWriteString (int fd, const char *chars) -{ - if (write (fd, chars, strlen(chars)+1) != strlen(chars)+1) + FcStrListDone (list); + /* return FcFalse if something went wrong */ + if (cache_dir) return FcFalse; return FcTrue; } -static void -FcGlobalCacheDirDestroy (FcGlobalCacheDir *d) +static int +FcCacheReadDirs (FcConfig * config, + FcStrList *list, FcFontSet * set, FcStrSet *processed_dirs) { - FcMemFree (FC_MEM_STRING, strlen (d->name)+1); - free (d->name); - FcMemFree (FC_MEM_CACHE, sizeof (FcGlobalCacheDir)); - free (d); -} + int ret = 0; + FcChar8 *dir; + FcStrSet *subdirs; + FcStrList *sublist; -FcGlobalCache * -FcGlobalCacheCreate (void) -{ - FcGlobalCache *cache; + /* + * Read in the results from 'list'. + */ + while ((dir = FcStrListNext (list))) + { + if (!FcConfigAcceptFilename (config, dir)) + continue; - cache = malloc (sizeof (FcGlobalCache)); - if (!cache) - return 0; - FcMemAlloc (FC_MEM_CACHE, sizeof (FcGlobalCache)); - cache->dirs = 0; - cache->updated = FcFalse; - cache->fd = -1; - return cache; -} + /* Skip this directory if already updated + * to avoid the looped directories via symlinks + * Clearly a dir not in fonts.conf shouldn't be globally cached. + */ -void -FcGlobalCacheDestroy (FcGlobalCache *cache) -{ - FcGlobalCacheDir *d, *next; + if (FcStrSetMember (processed_dirs, dir)) + continue; + if (!FcStrSetAdd (processed_dirs, dir)) + continue; - for (d = cache->dirs; d; d = next) - { - next = d->next; - FcGlobalCacheDirDestroy (d); + subdirs = FcStrSetCreate (); + if (!subdirs) + { + fprintf (stderr, "Can't create directory set\n"); + ret++; + continue; + } + + FcDirScanConfig (set, subdirs, + config->blanks, dir, FcFalse, config); + + sublist = FcStrListCreate (subdirs); + FcStrSetDestroy (subdirs); + if (!sublist) + { + fprintf (stderr, "Can't create subdir list in \"%s\"\n", dir); + ret++; + continue; + } + ret += FcCacheReadDirs (config, sublist, set, processed_dirs); } - FcMemFree (FC_MEM_CACHE, sizeof (FcGlobalCache)); - free (cache); + FcStrListDone (list); + return ret; } -void -FcGlobalCacheLoad (FcGlobalCache *cache, - FcStrSet *staleDirs, - const FcChar8 *cache_file, - FcConfig *config) +FcFontSet * +FcCacheRead (FcConfig *config) { - char name_buf[FC_MAX_FILE_LEN]; - FcGlobalCacheDir *d, *next; - FcFileTime config_time = FcConfigModifiedTime (config); - char * current_arch_machine_name; - char candidate_arch_machine_name[MACHINE_SIGNATURE_SIZE + 9]; - off_t current_arch_start; + FcFontSet *s = FcFontSetCreate(); + FcStrSet *processed_dirs; + + if (!s) + return 0; - struct stat cache_stat, dir_stat; + processed_dirs = FcStrSetCreate(); + if (!processed_dirs) + goto bail; - if (stat ((char *) cache_file, &cache_stat) < 0) - return; + if (FcCacheReadDirs (config, FcConfigGetConfigDirs (config), s, processed_dirs)) + goto bail1; - cache->fd = open ((char *) cache_file, O_RDONLY); - if (cache->fd == -1) - return; + FcStrSetDestroy (processed_dirs); + return s; + + bail1: + FcStrSetDestroy (processed_dirs); + bail: + FcFontSetDestroy (s); + return 0; +} - cache->updated = FcFalse; +/* + * Look for a cache file for the specified dir. Attempt + * to use each one we find, stopping when the callback + * indicates success + */ +static FcBool +FcDirCacheProcess (FcConfig *config, const FcChar8 *dir, + FcBool (*callback) (int fd, off_t size, void *closure), + void *closure) +{ + int fd = -1; + FcChar8 cache_base[CACHEBASE_LEN]; + FcStrList *list; + FcChar8 *cache_dir; + struct stat file_stat, dir_stat; + FcBool ret = FcFalse; - current_arch_machine_name = FcCacheMachineSignature (); - current_arch_start = FcCacheSkipToArch(cache->fd, - current_arch_machine_name, FcTrue); - if (current_arch_start < 0) - goto bail_and_destroy; + if (stat ((char *) dir, &dir_stat) < 0) + return FcFalse; - lseek (cache->fd, current_arch_start, SEEK_SET); - FcCacheReadString (cache->fd, candidate_arch_machine_name, - sizeof (candidate_arch_machine_name)); - if (strlen(candidate_arch_machine_name) == 0) - goto bail_and_destroy; + FcDirCacheBasename (dir, cache_base); - while (1) + list = FcStrListCreate (config->cacheDirs); + if (!list) + return FcFalse; + + while ((cache_dir = FcStrListNext (list))) { - off_t targ; - - FcCacheReadString (cache->fd, name_buf, sizeof (name_buf)); - if (!strlen(name_buf)) + FcChar8 *cache_hashed = FcStrPlus (cache_dir, cache_base); + if (!cache_hashed) break; + fd = open((char *) cache_hashed, O_RDONLY | O_BINARY); + FcStrFree (cache_hashed); + if (fd >= 0) { + if (fstat (fd, &file_stat) >= 0 && + dir_stat.st_mtime <= file_stat.st_mtime) + { + ret = (*callback) (fd, file_stat.st_size, closure); + if (ret) + { + close (fd); + break; + } + } + close (fd); + } + } + FcStrListDone (list); + + return ret; +} - /* Directory must be older than the global cache file; also - cache must be newer than the config file. */ - if (stat ((char *) name_buf, &dir_stat) < 0 || - dir_stat.st_mtime > cache_stat.st_mtime || - (config_time.set && cache_stat.st_mtime < config_time.time)) - { - FcCache md; - - FcStrSetAdd (staleDirs, FcStrCopy ((FcChar8 *)name_buf)); - read (cache->fd, &md, sizeof (FcCache)); - lseek (cache->fd, FcCacheNextOffset (lseek(cache->fd, 0, SEEK_CUR)) + md.count, SEEK_SET); - continue; - } - - d = malloc (sizeof (FcGlobalCacheDir)); - if (!d) - goto bail1; +FcBool +FcDirCacheLoad (int fd, off_t size, void *closure) +{ + FcCache *cache; + FcBool allocated = FcFalse; - d->next = cache->dirs; - cache->dirs = d; + if (size < sizeof (FcCache)) + return FcFalse; +#if defined(HAVE_MMAP) || defined(__CYGWIN__) + cache = mmap (0, size, PROT_READ, MAP_SHARED, fd, 0); +#elif defined(_WIN32) + { + HANDLE hFileMap; - d->name = (char *)FcStrCopy ((FcChar8 *)name_buf); - d->ent = 0; - d->offset = lseek (cache->fd, 0, SEEK_CUR); - if (read (cache->fd, &d->metadata, sizeof (FcCache)) != sizeof (FcCache)) - goto bail1; - targ = FcCacheNextOffset (lseek(cache->fd, 0, SEEK_CUR)) + d->metadata.count; - if (lseek (cache->fd, targ, SEEK_SET) != targ) - goto bail1; + cache = NULL; + hFileMap = CreateFileMapping((HANDLE) _get_osfhandle(fd), NULL, + PAGE_READONLY, 0, 0, NULL); + if (hFileMap != NULL) + { + cache = MapViewOfFile (hFileMap, FILE_MAP_READ, 0, 0, size); + CloseHandle (hFileMap); + } } - return; +#endif + if (!cache) + { + cache = malloc (size); + if (!cache) + return FcFalse; - bail1: - for (d = cache->dirs; d; d = next) + if (read (fd, cache, size) != size) + { + free (cache); + return FcFalse; + } + allocated = FcTrue; + } + if (cache->magic != FC_CACHE_MAGIC || + cache->size != size) { - next = d->next; - free (d); + if (allocated) + free (cache); + else + { +#if defined(HAVE_MMAP) || defined(__CYGWIN__) + munmap (cache, size); +#elif defined(_WIN32) + UnmapViewOfFile (cache); +#endif + } + return FcFalse; } - cache->dirs = 0; - - close (cache->fd); - cache->fd = -1; - return; - bail_and_destroy: - close (cache->fd); - cache->fd = -1; - - if (stat ((char *) cache_file, &cache_stat) == 0) - unlink ((char *)cache_file); + /* Mark allocated caches so they're freed rather than unmapped */ + if (allocated) + cache->magic = FC_CACHE_MAGIC_COPY; + + *((FcCache **) closure) = cache; + return FcTrue; +} - return; +FcCache * +FcDirCacheMap (const FcChar8 *dir, FcConfig *config) +{ + FcCache *cache = NULL; + if (!FcDirCacheProcess (config, dir, + FcDirCacheLoad, + &cache)) + return NULL; + return cache; } FcBool -FcGlobalCacheReadDir (FcFontSet *set, FcStrSet *dirs, FcGlobalCache * cache, const char *dir, FcConfig *config) +FcDirCacheRead (FcFontSet * set, FcStrSet * dirs, + const FcChar8 *dir, FcConfig *config) { - FcGlobalCacheDir *d; - FcBool ret = FcFalse; + FcCache *cache; + int i; + FcFontSet *cache_set; + intptr_t *cache_dirs; + FcPattern **cache_fonts; - if (cache->fd == -1) + cache = FcDirCacheMap (dir, config); + if (!cache) return FcFalse; - - for (d = cache->dirs; d; d = d->next) + + cache_set = FcCacheSet (cache); + cache_fonts = FcFontSetFonts(cache_set); + if (FcDebug() & FC_DBG_CACHE) + printf ("FcDirCacheRead mapped cache for %s (%d fonts %d subdirs)\n", + dir, cache_set->nfont, cache->dirs_count); + for (i = 0; i < cache_set->nfont; i++) { - if (strncmp (d->name, dir, strlen(dir)) == 0) - { - lseek (cache->fd, d->offset, SEEK_SET); - if (!FcDirCacheConsume (cache->fd, dir, set)) - return FcFalse; - if (strcmp (d->name, dir) == 0) - ret = FcTrue; + FcPattern *font = FcEncodedOffsetToPtr (cache_set, + cache_fonts[i], + FcPattern); + if (FcDebug() & FC_DBG_CACHEV) { + printf ("Mapped font %d\n", i); + FcPatternPrint (font); } + FcFontSetAdd (set, font); } - + + cache_dirs = FcCacheDirs (cache); + for (i = 0; i < cache->dirs_count; i++) + FcStrSetAdd (dirs, FcOffsetToPtr (cache_dirs, + cache_dirs[i], + FcChar8)); + + if (config) + FcConfigAddFontDir (config, (FcChar8 *)dir); + + return FcTrue; +} + +static FcBool +FcDirCacheValidate (int fd, off_t size, void *closure) +{ + FcBool ret = FcTrue; + FcCache c; + struct stat file_stat; + + if (read (fd, &c, sizeof (FcCache)) != sizeof (FcCache)) + ret = FcFalse; + else if (fstat (fd, &file_stat) < 0) + ret = FcFalse; + else if (c.magic != FC_CACHE_MAGIC) + ret = FcFalse; + else if (file_stat.st_size != c.size) + ret = FcFalse; return ret; } FcBool -FcGlobalCacheUpdate (FcGlobalCache *cache, - const char *name, - FcFontSet *set) +FcDirCacheValid (const FcChar8 *dir, FcConfig *config) { - FcGlobalCacheDir * d; - - if (!set->nfont) - return FcTrue; - - for (d = cache->dirs; d; d = d->next) - { - if (strcmp(d->name, name) == 0) - break; - } + return FcDirCacheProcess (config, dir, FcDirCacheValidate, NULL); +} - if (!d) +void +FcDirCacheUnmap (FcCache *cache) +{ + if (cache->magic == FC_CACHE_MAGIC_COPY) { - d = malloc (sizeof (FcGlobalCacheDir)); - if (!d) - return FcFalse; - d->next = cache->dirs; - cache->dirs = d; + free (cache); + return; } - - cache->updated = FcTrue; - - d->name = (char *)FcStrCopy ((FcChar8 *)name); - d->ent = FcDirCacheProduce (set, &d->metadata); - d->offset = 0; - return FcTrue; +#if defined(HAVE_MMAP) || defined(__CYGWIN__) + munmap (cache, cache->size); +#elif defined(_WIN32) + UnmapViewOfFile (cache); +#endif } -FcBool -FcGlobalCacheSave (FcGlobalCache *cache, - const FcChar8 *cache_file) +/* + * Cache file is: + * + * FcCache + * dir name + * subdirs + * FcFontSet + */ + +static FcCache * +FcDirCacheProduce (FcFontSet *set, const FcChar8 *dir, FcStrSet *dirs) { - int fd, fd_orig; - FcGlobalCacheDir *dir; - FcAtomic *atomic; - off_t current_arch_start = 0, truncate_to; - char * current_arch_machine_name, * header; - - if (!cache->updated) - return FcTrue; - -#if defined (HAVE_GETUID) && defined (HAVE_GETEUID) - /* Set-UID programs can't safely update the cache */ - if (getuid () != geteuid ()) - return FcFalse; -#endif + FcSerialize *serialize = FcSerializeCreate (); + FcCache *cache; + int i; + intptr_t cache_offset; + intptr_t dirs_offset; + FcChar8 *dir_serialize; + intptr_t *dirs_serialize; + FcFontSet *set_serialize; - atomic = FcAtomicCreate (cache_file); - if (!atomic) - return FcFalse; - - if (!FcAtomicLock (atomic)) + if (!serialize) + return NULL; + /* + * Space for cache structure + */ + cache_offset = FcSerializeReserve (serialize, sizeof (FcCache)); + /* + * Directory name + */ + if (!FcStrSerializeAlloc (serialize, dir)) goto bail1; - fd = open ((char *) FcAtomicNewFile(atomic), O_RDWR | O_CREAT, - S_IRUSR | S_IWUSR); - if (fd == -1) - goto bail2; - - fd_orig = open ((char *) FcAtomicOrigFile(atomic), O_RDONLY); - - current_arch_machine_name = FcCacheMachineSignature (); - if (fd_orig == -1) - current_arch_start = 0; - else - current_arch_start = FcCacheSkipToArch (fd_orig, - current_arch_machine_name, - FcTrue); - - if (current_arch_start < 0) - current_arch_start = FcCacheNextOffset (lseek(fd_orig, 0, SEEK_END)); - - if (!FcCacheCopyOld(fd, fd_orig, current_arch_start)) - goto bail3; + /* + * Subdirs + */ + dirs_offset = FcSerializeAlloc (serialize, dirs, dirs->num * sizeof (FcChar8 *)); + for (i = 0; i < dirs->num; i++) + if (!FcStrSerializeAlloc (serialize, dirs->strs[i])) + goto bail1; - close (fd_orig); - fd_orig = -1; + /* + * Patterns + */ + if (!FcFontSetSerializeAlloc (serialize, set)) + goto bail1; + + /* Serialize layout complete. Now allocate space and fill it */ + cache = malloc (serialize->size); + if (!cache) + goto bail1; + /* shut up valgrind */ + memset (cache, 0, serialize->size); - current_arch_start = lseek(fd, 0, SEEK_CUR); - if (ftruncate (fd, current_arch_start) == -1) - goto bail3; + serialize->linear = cache; - header = malloc (10 + strlen (current_arch_machine_name)); - if (!header) - goto bail3; + cache->magic = FC_CACHE_MAGIC; + cache->size = serialize->size; - truncate_to = current_arch_start + strlen(current_arch_machine_name) + 11; - for (dir = cache->dirs; dir; dir = dir->next) + /* + * Serialize directory name + */ + dir_serialize = FcStrSerialize (serialize, dir); + if (!dir_serialize) + goto bail2; + cache->dir = FcPtrToOffset (cache, dir_serialize); + + /* + * Serialize sub dirs + */ + dirs_serialize = FcSerializePtr (serialize, dirs); + if (!dirs_serialize) + goto bail2; + cache->dirs = FcPtrToOffset (cache, dirs_serialize); + cache->dirs_count = dirs->num; + for (i = 0; i < dirs->num; i++) { - truncate_to += strlen(dir->name) + 1; - truncate_to += sizeof (FcCache); - truncate_to = FcCacheNextOffset (truncate_to); - truncate_to += dir->metadata.count; + FcChar8 *d_serialize = FcStrSerialize (serialize, dirs->strs[i]); + if (!d_serialize) + goto bail2; + dirs_serialize[i] = FcPtrToOffset (dirs_serialize, d_serialize); } - truncate_to -= current_arch_start; + + /* + * Serialize font set + */ + set_serialize = FcFontSetSerialize (serialize, set); + if (!set_serialize) + goto bail2; + cache->set = FcPtrToOffset (cache, set_serialize); - sprintf (header, "%8x ", (int)truncate_to); - strcat (header, current_arch_machine_name); - if (!FcCacheWriteString (fd, header)) - goto bail4; + FcSerializeDestroy (serialize); + + return cache; - for (dir = cache->dirs; dir; dir = dir->next) - { - if (dir->ent) - { - FcCacheWriteString (fd, dir->name); - write (fd, &dir->metadata, sizeof(FcCache)); - lseek (fd, FcCacheNextOffset (lseek(fd, 0, SEEK_CUR)), SEEK_SET); - write (fd, dir->ent, dir->metadata.count); - free (dir->ent); - } - } - FcCacheWriteString (fd, ""); +bail2: + free (cache); +bail1: + FcSerializeDestroy (serialize); + return NULL; +} - if (close (fd) == -1) - goto bail25; +static FcBool +FcMakeDirectory (const FcChar8 *dir) +{ + FcChar8 *parent; + FcBool ret; - if (!FcAtomicReplaceOrig (atomic)) - goto bail25; + if (strlen ((char *) dir) == 0) + return FcFalse; - FcAtomicUnlock (atomic); - FcAtomicDestroy (atomic); + parent = FcStrDirname (dir); + if (!parent) + return FcFalse; + if (access ((char *) parent, W_OK|X_OK) == 0) + ret = mkdir ((char *) dir, 0777) == 0; + else if (access ((char *) parent, F_OK) == -1) + ret = FcMakeDirectory (parent) && (mkdir ((char *) dir, 0777) == 0); + else + ret = FcFalse; + FcStrFree (parent); + return ret; +} - cache->updated = FcFalse; - return FcTrue; - - bail4: - free (header); - bail3: - if (fd_orig != -1) - close (fd_orig); - - close (fd); - bail25: - FcAtomicDeleteNew (atomic); - bail2: - FcAtomicUnlock (atomic); - bail1: - FcAtomicDestroy (atomic); - return FcFalse; -} - -/* - * Find the next presumably-mmapable offset after the supplied file - * position. - */ -static int -FcCacheNextOffset(off_t w) -{ - static long pagesize = -1; - if (pagesize == -1) - pagesize = sysconf(_SC_PAGESIZE); - if (w % pagesize == 0) - return w; - else - return ((w / pagesize)+1)*pagesize; -} - -/* return the address of the segment for the provided arch, - * or -1 if arch not found */ -static off_t -FcCacheSkipToArch (int fd, const char * arch, FcBool global) -{ - char candidate_arch_machine_name_count[MACHINE_SIGNATURE_SIZE + 9]; - char * candidate_arch; - off_t current_arch_start = 0; - - lseek (fd, 0, SEEK_SET); - if (!global) - FcCacheSkipString (fd); - current_arch_start = lseek (fd, 0, SEEK_CUR); - - /* skip arches that are not the current arch */ - while (1) - { - long bs; - - if (lseek (fd, current_arch_start, SEEK_SET) != current_arch_start) - return -1; - - if (FcCacheReadString (fd, candidate_arch_machine_name_count, - sizeof (candidate_arch_machine_name_count)) == 0) - return -1; - if (!strlen(candidate_arch_machine_name_count)) - return -1; - bs = strtol(candidate_arch_machine_name_count, &candidate_arch, 16); - - // count = 0 should probably be distinguished from the !bs condition - if (!bs || bs < strlen (candidate_arch_machine_name_count)) - return -1; - - candidate_arch++; /* skip leading space */ - - if (strcmp (candidate_arch, arch)==0) - return current_arch_start; - current_arch_start += bs; - } - - return -1; -} - -/* Cuts out the segment at the file pointer (moves everything else - * down to cover it), and leaves the file pointer at the end of the - * file. */ -static FcBool -FcCacheCopyOld (int fd, int fd_orig, off_t start) -{ - char * buf = malloc (8192); - char candidate_arch_machine_name[MACHINE_SIGNATURE_SIZE + 9]; - long bs; - int c, bytes_skipped; - off_t loc; - - if (!buf) - return FcFalse; - - loc = 0; - lseek (fd, 0, SEEK_SET); lseek (fd_orig, 0, SEEK_SET); - do - { - int b = 8192; - if (loc + b > start) - b = start - loc; - - if ((c = read (fd_orig, buf, b)) <= 0) - break; - if (write (fd, buf, c) < 0) - goto bail; - - loc += c; - } - while (c > 0); - - lseek (fd, start, SEEK_SET); - if (FcCacheReadString (fd, candidate_arch_machine_name, - sizeof (candidate_arch_machine_name)) == 0) - goto done; - if (!strlen(candidate_arch_machine_name)) - goto done; - - bs = strtol(candidate_arch_machine_name, 0, 16); - if (bs == 0) - goto done; - - bytes_skipped = 0; - do - { - lseek (fd, start+bs+bytes_skipped, SEEK_SET); - if ((c = read (fd, buf, 8192)) <= 0) - break; - lseek (fd, start+bytes_skipped, SEEK_SET); - if (write (fd, buf, c) < 0) - goto bail; - bytes_skipped += c; - } - while (c > 0); - lseek (fd, start+bytes_skipped, SEEK_SET); - - done: - free (buf); - return FcTrue; - - bail: - free (buf); - return FcFalse; -} - -/* Does not check that the cache has the appropriate arch section. */ -FcBool -FcDirCacheValid (const FcChar8 *dir) -{ - FcChar8 *cache_file; - struct stat file_stat, dir_stat; - int fd; - - if (stat ((char *) dir, &dir_stat) < 0) - return FcFalse; - - cache_file = FcStrPlus (dir, (FcChar8 *) "/" FC_DIR_CACHE_FILE); - if (!cache_file) - return FcFalse; - - fd = FcDirCacheOpen ((char *)cache_file); - - if (fd < 0) - goto bail; - if (fstat (fd, &file_stat) < 0) - goto bail1; - - close (fd); - FcStrFree (cache_file); +/* write serialized state to the cache file */ +FcBool +FcDirCacheWrite (FcFontSet *set, FcStrSet *dirs, const FcChar8 *dir, FcConfig *config) +{ + FcChar8 cache_base[CACHEBASE_LEN]; + FcChar8 *cache_hashed; + int fd; + FcAtomic *atomic; + FcCache *cache; + FcStrList *list; + FcChar8 *cache_dir = NULL; + FcChar8 *test_dir; /* - * If the directory has been modified more recently than - * the cache file, the cache is not valid + * Write it to the first directory in the list which is writable */ - if (dir_stat.st_mtime > file_stat.st_mtime) - return FcFalse; - - return FcTrue; - - bail1: - close (fd); - bail: - FcStrFree (cache_file); - return FcFalse; -} - -/* Assumes that the cache file in 'dir' exists. - * Checks that the cache has the appropriate arch section. */ -FcBool -FcDirCacheHasCurrentArch (const FcChar8 *dir) -{ - char *cache_file; - int fd; - off_t current_arch_start; - char *current_arch_machine_name; - - cache_file = (char *)FcStrPlus (dir, (FcChar8 *) "/" FC_DIR_CACHE_FILE); - if (!cache_file) - return FcFalse; - - fd = FcDirCacheOpen (cache_file); - if (fd < 0) - goto bail; - - current_arch_machine_name = FcCacheMachineSignature(); - current_arch_start = FcCacheSkipToArch(fd, - current_arch_machine_name, FcFalse); - close (fd); - - if (current_arch_start < 0) - return FcFalse; - return FcTrue; - - bail: - free (cache_file); - return FcFalse; -} - -FcBool -FcDirCacheUnlink (const FcChar8 *dir) -{ - FcChar8 *cache_file = FcStrPlus (dir, (FcChar8 *) "/" FC_DIR_CACHE_FILE); - struct stat cache_stat; - - if (stat ((char *) cache_file, &cache_stat) == 0 && - unlink ((char *)cache_file) != 0) - { - FcStrFree (cache_file); - return FcFalse; - } - - FcStrFree (cache_file); - return FcTrue; -} - -static int -FcCacheReadDirs (FcConfig * config, FcGlobalCache * cache, - FcStrList *list, FcFontSet * set) -{ - int ret = 0; - FcChar8 *dir; - FcChar8 *file, *base; - FcStrSet *subdirs; - FcStrList *sublist; - struct stat statb; - - /* - * Read in the results from 'list'. - */ - while ((dir = FcStrListNext (list))) - { - if (!FcConfigAcceptFilename (config, dir)) - continue; - - /* freed below */ - file = (FcChar8 *) malloc (strlen ((char *) dir) + 1 + FC_MAX_FILE_LEN + 1); - if (!file) - return FcFalse; - - strcpy ((char *) file, (char *) dir); - strcat ((char *) file, "/"); - base = file + strlen ((char *) file); - - subdirs = FcStrSetCreate (); - if (!subdirs) + list = FcStrListCreate (config->cacheDirs); + if (!list) + return FcFalse; + while ((test_dir = FcStrListNext (list))) { + if (access ((char *) test_dir, W_OK|X_OK) == 0) { - fprintf (stderr, "Can't create directory set\n"); - ret++; - free (file); - continue; + cache_dir = test_dir; + break; } - - if (access ((char *) dir, X_OK) < 0) + else { - switch (errno) { - case ENOENT: - case ENOTDIR: - case EACCES: - break; - default: - fprintf (stderr, "\"%s\": ", dir); - perror (""); - ret++; + /* + * If the directory doesn't exist, try to create it + */ + if (access ((char *) test_dir, F_OK) == -1) { + if (FcMakeDirectory (test_dir)) + { + cache_dir = test_dir; + break; + } } - FcStrSetDestroy (subdirs); - free (file); - continue; } - if (stat ((char *) dir, &statb) == -1) - { - fprintf (stderr, "\"%s\": ", dir); - perror (""); - FcStrSetDestroy (subdirs); - ret++; - free (file); - continue; - } - if (!S_ISDIR (statb.st_mode)) - { - fprintf (stderr, "\"%s\": not a directory, skipping\n", dir); - FcStrSetDestroy (subdirs); - free (file); - continue; - } - if (!FcDirCacheValid (dir) || !FcDirCacheRead (set, subdirs, dir)) - { - if (FcDebug () & FC_DBG_FONTSET) - printf ("cache scan dir %s\n", dir); - - FcDirScanConfig (set, subdirs, cache, - config->blanks, dir, FcFalse, config); - } - sublist = FcStrListCreate (subdirs); - FcStrSetDestroy (subdirs); - if (!sublist) - { - fprintf (stderr, "Can't create subdir list in \"%s\"\n", dir); - ret++; - free (file); - continue; - } - ret += FcCacheReadDirs (config, cache, sublist, set); - free (file); } FcStrListDone (list); - return ret; -} - -FcFontSet * -FcCacheRead (FcConfig *config, FcGlobalCache * cache) -{ - FcFontSet * s = FcFontSetCreate(); - if (!s) - return 0; - - if (FcCacheReadDirs (config, cache, FcConfigGetConfigDirs (config), s)) - goto bail; - - return s; - - bail: - FcFontSetDestroy (s); - return 0; -} - -static const char bin2hex[] = { '0', '1', '2', '3', - '4', '5', '6', '7', - '8', '9', 'a', 'b', - 'c', 'd', 'e', 'f' }; - -static char * -FcDirCacheHashName (char * cache_file, int collisions) -{ - unsigned char hash[16], hex_hash[33]; - char *cache_hashed; - unsigned char uscore = '_'; - int cnt, i; - FcChar8 *tmp; - struct MD5Context ctx; - - MD5Init (&ctx); - MD5Update (&ctx, (unsigned char *)cache_file, strlen (cache_file)); - - for (i = 0; i < collisions; i++) - MD5Update (&ctx, &uscore, 1); - - MD5Final (hash, &ctx); - - for (cnt = 0; cnt < 16; ++cnt) - { - hex_hash[2*cnt] = bin2hex[hash[cnt] >> 4]; - hex_hash[2*cnt+1] = bin2hex[hash[cnt] & 0xf]; - } - hex_hash[32] = 0; - - tmp = FcStrPlus ((FcChar8 *)hex_hash, (FcChar8 *)FC_CACHE_SUFFIX); - if (!tmp) - return 0; - - cache_hashed = (char *)FcStrPlus ((FcChar8 *)PKGCACHEDIR, tmp); - free (tmp); - - return cache_hashed; -} - -/* Opens the hashed name for cache_file. - * This would fail in the unlikely event of a collision and subsequent - * removal of the file which originally caused the collision. */ -static int -FcDirCacheOpen (char *cache_file) -{ - int fd = -1, collisions = 0; - char *cache_hashed; - char name_buf[FC_MAX_FILE_LEN]; - - do - { - cache_hashed = FcDirCacheHashName (cache_file, collisions++); - if (!cache_hashed) - return -1; - - if (fd > 0) - close (fd); - fd = open(cache_hashed, O_RDONLY); - if (fd == -1) - return -1; - FcCacheReadString (fd, name_buf, sizeof (name_buf)); - if (!strlen(name_buf)) - goto bail; - } while (strcmp (name_buf, cache_file) != 0); - return fd; - - bail: - close (fd); - return -1; -} - -/* read serialized state from the cache file */ -FcBool -FcDirCacheRead (FcFontSet * set, FcStrSet * dirs, const FcChar8 *dir) -{ - char *cache_file; - int fd; - char *current_arch_machine_name; - char candidate_arch_machine_name[9+MACHINE_SIGNATURE_SIZE]; - off_t current_arch_start = 0; - char subdirName[FC_MAX_FILE_LEN + 1 + 12 + 1]; - - cache_file = (char *)FcStrPlus (dir, (FcChar8 *) "/" FC_DIR_CACHE_FILE); - if (!cache_file) + if (!cache_dir) return FcFalse; - fd = FcDirCacheOpen (cache_file); - if (fd < 0) - goto bail; - - current_arch_machine_name = FcCacheMachineSignature(); - current_arch_start = FcCacheSkipToArch(fd, - current_arch_machine_name, - FcFalse); - if (current_arch_start < 0) - goto bail1; - - lseek (fd, current_arch_start, SEEK_SET); - if (FcCacheReadString (fd, candidate_arch_machine_name, - sizeof (candidate_arch_machine_name)) == 0) - goto bail1; - - while (strlen(FcCacheReadString (fd, subdirName, sizeof (subdirName))) > 0) - FcStrSetAdd (dirs, (FcChar8 *)subdirName); - - if (!FcDirCacheConsume (fd, (const char *)dir, set)) - goto bail1; - - close(fd); - free (cache_file); - return FcTrue; - - bail1: - close (fd); - bail: - free (cache_file); - return FcFalse; -} - -static FcBool -FcDirCacheConsume (int fd, const char * dir, FcFontSet *set) -{ - FcCache metadata; - void * current_dir_block; - off_t pos; - - read(fd, &metadata, sizeof(FcCache)); - if (metadata.magic != FC_CACHE_MAGIC) + FcDirCacheBasename (dir, cache_base); + cache_hashed = FcStrPlus (cache_dir, cache_base); + if (!cache_hashed) return FcFalse; - if (!metadata.count) - return FcTrue; - - pos = FcCacheNextOffset (lseek(fd, 0, SEEK_CUR)); - current_dir_block = mmap (0, metadata.count, - PROT_READ, MAP_SHARED, fd, pos); - if (current_dir_block == MAP_FAILED) - return FcFalse; + cache = FcDirCacheProduce (set, dir, dirs); - FcCacheAddBankDir (metadata.bank, dir); - - if (!FcFontSetUnserialize (&metadata, set, current_dir_block)) - return FcFalse; - - return FcTrue; -} - -static void * -FcDirCacheProduce (FcFontSet *set, FcCache *metadata) -{ - void * current_dir_block, * final_dir_block; - static unsigned int rand_state = 0; - int bank, needed_bytes_no_align; - - if (!rand_state) - rand_state = time(0L); - bank = rand_r(&rand_state); - - while (FcCacheHaveBank(bank)) - bank = rand_r(&rand_state); - - memset (metadata, 0, sizeof(FcCache)); - FcFontSetNewBank(); - needed_bytes_no_align = FcFontSetNeededBytes (set); - metadata->count = needed_bytes_no_align + - FcFontSetNeededBytesAlign (); - metadata->magic = FC_CACHE_MAGIC; - metadata->bank = bank; - - if (!needed_bytes_no_align) /* not a failure, no fonts to write */ - { - /* no, you don't really need to write any bytes at all. */ - metadata->count = 0; - return 0; - } - - current_dir_block = malloc (metadata->count); - if (!current_dir_block) - goto bail; - // shut up valgrind - memset (current_dir_block, 0, metadata->count); - final_dir_block = FcFontSetDistributeBytes (metadata, current_dir_block); - - if ((void *)((char *)current_dir_block+metadata->count) < final_dir_block) - goto bail; - - if (!FcFontSetSerialize (bank, set)) - goto bail; - - return current_dir_block; - - bail: - free (current_dir_block); - return 0; -} - -/* write serialized state to the cache file */ -FcBool -FcDirCacheWrite (FcFontSet *set, FcStrSet *dirs, const FcChar8 *dir) -{ - char *cache_file; - char *cache_hashed; - int fd, fd_orig, i, dirs_count; - FcAtomic *atomic; - FcCache metadata; - off_t current_arch_start = 0, truncate_to; - char name_buf[FC_MAX_FILE_LEN]; - int collisions; - - char *current_arch_machine_name, * header; - void *current_dir_block = 0; - - cache_file = (char *)FcStrPlus (dir, (FcChar8 *) "/" FC_DIR_CACHE_FILE); - if (!cache_file) - goto bail; - - /* Ensure that we're not trampling a cache for some other dir. */ - /* This is slightly different from FcDirCacheOpen, since it - * needs the filename, not the file descriptor. */ - fd = -1; collisions = 0; - do - { - cache_hashed = FcDirCacheHashName (cache_file, collisions++); - if (!cache_hashed) - goto bail0; - - if (fd > 0) - close (fd); - fd = open(cache_hashed, O_RDONLY); - if (fd == -1) - break; - FcCacheReadString (fd, name_buf, sizeof (name_buf)); - close (fd); - - if (!strlen(name_buf)) - break; - - if (strcmp (name_buf, cache_file) != 0) - continue; - } while (0); - - current_dir_block = FcDirCacheProduce (set, &metadata); - - if (metadata.count && !current_dir_block) + if (!cache) goto bail1; if (FcDebug () & FC_DBG_CACHE) - printf ("FcDirCacheWriteDir cache_file \"%s\"\n", cache_file); + printf ("FcDirCacheWriteDir dir \"%s\" file \"%s\"\n", + dir, cache_hashed); atomic = FcAtomicCreate ((FcChar8 *)cache_hashed); if (!atomic) - goto bail1; + goto bail2; if (!FcAtomicLock (atomic)) - goto bail2; - - fd_orig = open((char *)FcAtomicOrigFile (atomic), O_RDONLY, 0666); + goto bail3; - fd = open((char *)FcAtomicNewFile (atomic), O_RDWR | O_CREAT, 0666); + fd = open((char *)FcAtomicNewFile (atomic), O_RDWR | O_CREAT | O_BINARY, 0666); if (fd == -1) - goto bail3; - - FcCacheWriteString (fd, cache_file); - - current_arch_machine_name = FcCacheMachineSignature (); - current_arch_start = 0; - - if (fd_orig != -1) - current_arch_start = - FcCacheSkipToArch(fd_orig, current_arch_machine_name, FcFalse); - - if (current_arch_start < 0) - current_arch_start = FcCacheNextOffset (lseek(fd_orig, 0, SEEK_END)); - - if (fd_orig != -1 && !FcCacheCopyOld(fd, fd_orig, current_arch_start)) - goto bail4; - - if (fd_orig != -1) - close (fd_orig); - - current_arch_start = lseek(fd, 0, SEEK_CUR); - if (ftruncate (fd, current_arch_start) == -1) goto bail4; - - /* allocate space for subdir names in this block */ - dirs_count = 0; - for (i = 0; i < dirs->size; i++) - dirs_count += strlen((char *)dirs->strs[i]) + 1; - dirs_count ++; - - /* now write the address of the next offset */ - truncate_to = FcCacheNextOffset (FcCacheNextOffset (current_arch_start + sizeof (FcCache) + dirs_count) + metadata.count) - current_arch_start; - header = malloc (10 + strlen (current_arch_machine_name)); - if (!header) - goto bail4; - sprintf (header, "%8x ", (int)truncate_to); - strcat (header, current_arch_machine_name); - if (!FcCacheWriteString (fd, header)) - goto bail5; - - for (i = 0; i < dirs->size; i++) - FcCacheWriteString (fd, (char *)dirs->strs[i]); - FcCacheWriteString (fd, ""); - - write (fd, &metadata, sizeof(FcCache)); - if (metadata.count) + + if (write (fd, cache, cache->size) != cache->size) { - lseek (fd, FcCacheNextOffset (lseek(fd, 0, SEEK_END)), SEEK_SET); - write (fd, current_dir_block, metadata.count); - free (current_dir_block); - } - - /* this actually serves to pad out the cache file, if needed */ - if (ftruncate (fd, current_arch_start + truncate_to) == -1) + perror ("write cache"); goto bail5; + } close(fd); if (!FcAtomicReplaceOrig(atomic)) - goto bail5; + goto bail4; + FcStrFree ((FcChar8 *)cache_hashed); FcAtomicUnlock (atomic); FcAtomicDestroy (atomic); return FcTrue; bail5: - free (header); - bail4: close (fd); - bail3: + bail4: FcAtomicUnlock (atomic); - bail2: + bail3: FcAtomicDestroy (atomic); + bail2: + free (cache); bail1: - free (cache_hashed); - bail0: - unlink ((char *)cache_file); - free (cache_file); - if (current_dir_block) - free (current_dir_block); - bail: - return FcFalse; -} - -static char * -FcCacheMachineSignature () -{ - static char buf[MACHINE_SIGNATURE_SIZE]; - int32_t magic = ENDIAN_TEST; - char * m = (char *)&magic; - - sprintf (buf, "%2x%2x%2x%2x " - "%4x %4x %4x %4x %4x %4x %4x %4x %4x %4x %4x %4x " - "%4x %4x %4x %4x %4x %4x %4x %4x\n", - m[0], m[1], m[2], m[3], - (unsigned int)sizeof (char), - (unsigned int)sizeof (char *), - (unsigned int)sizeof (int), - (unsigned int)sizeof (FcPattern), - (unsigned int)sizeof (FcPatternEltPtr), - (unsigned int)sizeof (struct _FcPatternElt *), - (unsigned int)sizeof (FcPatternElt), - (unsigned int)sizeof (FcObjectPtr), - (unsigned int)sizeof (FcValueListPtr), - (unsigned int)sizeof (FcValue), - (unsigned int)sizeof (FcValueBinding), - (unsigned int)sizeof (struct _FcValueList *), - (unsigned int)sizeof (FcCharSet), - (unsigned int)sizeof (FcCharLeaf **), - (unsigned int)sizeof (FcChar16 *), - (unsigned int)sizeof (FcChar16), - (unsigned int)sizeof (FcCharLeaf), - (unsigned int)sizeof (FcChar32), - (unsigned int)sizeof (FcCache), - (unsigned int)sysconf(_SC_PAGESIZE)); - - return buf; -} - -static int banks_ptr = 0, banks_alloc = 0; -int * _fcBankId = 0, * _fcBankIdx = 0; -static const char ** bankDirs = 0; - -static FcBool -FcCacheHaveBank (int bank) -{ - int i; - - if (bank < FC_BANK_FIRST) - return FcTrue; - - for (i = 0; i < banks_ptr; i++) - if (_fcBankId[i] == bank) - return FcTrue; - + FcStrFree ((FcChar8 *)cache_hashed); return FcFalse; } -int -FcCacheBankToIndexMTF (int bank) -{ - int i, j; - - for (i = 0; i < banks_ptr; i++) - if (_fcBankId[_fcBankIdx[i]] == bank) - { - int t = _fcBankIdx[i]; - - for (j = i; j > 0; j--) - _fcBankIdx[j] = _fcBankIdx[j-1]; - _fcBankIdx[0] = t; - return t; - } - - if (banks_ptr >= banks_alloc) - { - int * b, * bidx; - const char ** bds; - - b = realloc (_fcBankId, (banks_alloc + 4) * sizeof(int)); - if (!b) - return -1; - _fcBankId = b; - - bidx = realloc (_fcBankIdx, (banks_alloc + 4) * sizeof(int)); - if (!bidx) - return -1; - _fcBankIdx = bidx; - - bds = realloc (bankDirs, (banks_alloc + 4) * sizeof (char *)); - if (!bds) - return -1; - bankDirs = bds; - - banks_alloc += 4; - } - - i = banks_ptr++; - _fcBankId[i] = bank; - _fcBankIdx[i] = i; - return i; -} - -static void -FcCacheAddBankDir (int bank, const char * dir) -{ - int bi = FcCacheBankToIndexMTF (bank); - - if (bi < 0) - return; - - bankDirs[bi] = (const char *)FcStrCopy ((FcChar8 *)dir); -} - -const char * -FcCacheFindBankDir (int bank) -{ - int bi = FcCacheBankToIndex (bank); - return bankDirs[bi]; -} - /* * This code implements the MD5 message-digest algorithm. * The algorithm is due to Ron Rivest. This code was