X-Git-Url: https://git.wh0rd.org/?a=blobdiff_plain;f=src%2Ffccache.c;h=a67725341a1a442e5eb82532fcf8c0b5aff13b45;hb=af180c40376690b7ced5262156fbe13c9ebba1e2;hp=95e1942b8a52f69122665dde11831fc8ecdd3d61;hpb=8cb4c56d9925bba17bce32c12f7e09d8f36b2e53;p=fontconfig.git diff --git a/src/fccache.c b/src/fccache.c index 95e1942..a677253 100644 --- a/src/fccache.c +++ b/src/fccache.c @@ -23,697 +23,467 @@ * PERFORMANCE OF THIS SOFTWARE. */ +#include "fcint.h" +#include "../fc-arch/fcarch.h" +#include #include #include -#include -#include +#include #include -#include -#include "fcint.h" +#if defined(HAVE_MMAP) || defined(__CYGWIN__) +# include +# include +#elif defined(_WIN32) +# include +#endif #define ENDIAN_TEST 0x12345678 -#define MACHINE_SIGNATURE_SIZE 9 + 5*19 + 1 +#define MACHINE_SIGNATURE_SIZE (9 + 5*20 + 1) +/* for when we don't have sysconf: */ +#define FC_HARDCODED_PAGESIZE 8192 -static off_t -FcCacheSkipToArch (int fd, const char * arch); +#ifndef O_BINARY +#define O_BINARY 0 +#endif -static FcBool -FcCacheMoveDown (int fd, off_t start); +static FILE * +FcDirCacheOpen (FcConfig *config, const FcChar8 *dir, FcChar8 **cache_path); static void * FcDirCacheProduce (FcFontSet *set, FcCache * metadata); -static FcBool -FcDirCacheConsume (int fd, FcFontSet *set); +static off_t +FcCacheNextOffset(off_t w); static FcBool -FcDirCacheRead (FcFontSet * set, FcStrSet * dirs, const FcChar8 *dir); +FcCacheHaveBank (int bank); -static int -FcCacheNextOffset(off_t w); +static void +FcCacheAddBankDir (int bank, const char * dir); -static char * -FcCacheMachineSignature (void); +struct MD5Context { + FcChar32 buf[4]; + FcChar32 bits[2]; + unsigned char in[64]; +}; -static FcBool -FcCacheHaveBank (int bank); +static void MD5Init(struct MD5Context *ctx); +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 -static FcChar8 * -FcCacheReadString (int fd, FcChar8 *dest, int len) +static char * +FcCacheReadString (FILE *file, char *dest, int len) { - FcChar8 c; - FcBool escape; - int size; - int i; + int c; + char *d = dest; if (len == 0) return 0; - - size = len; - i = 0; - escape = FcFalse; - while (read (fd, &c, 1) == 1) - { - if (!escape) - { - switch (c) { - case '"': - c = '\0'; - break; - case '\\': - escape = FcTrue; - continue; - } - } - if (i == size) - { - dest[i++] = 0; - return dest; - } - dest[i++] = c; + + while ((c = getc (file)) != EOF && len > 0) { + *d++ = c; if (c == '\0') return dest; - escape = FcFalse; + len--; } return 0; } static FcBool -FcCacheWriteString (int fd, const FcChar8 *chars) +FcCacheWriteString (int fd, const char *chars) { if (write (fd, chars, strlen(chars)+1) != strlen(chars)+1) return FcFalse; return FcTrue; } -static void -FcGlobalCacheDirDestroy (FcGlobalCacheDir *d) -{ - FcMemFree (FC_MEM_STRING, strlen (d->name)+1); - free (d->name); - FcMemFree (FC_MEM_CACHE, sizeof (FcGlobalCacheDir)); - free (d); -} - -FcGlobalCache * -FcGlobalCacheCreate (void) -{ - FcGlobalCache *cache; - - 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; -} - -void -FcGlobalCacheDestroy (FcGlobalCache *cache) -{ - FcGlobalCacheDir *d, *next; - - for (d = cache->dirs; d; d = next) - { - next = d->next; - FcGlobalCacheDirDestroy (d); - } - FcMemFree (FC_MEM_CACHE, sizeof (FcGlobalCache)); - free (cache); -} - -void -FcGlobalCacheLoad (FcGlobalCache *cache, - FcStrSet *staleDirs, - const FcChar8 *cache_file) -{ - FcChar8 name_buf[8192]; - FcGlobalCacheDir *d, *next; - char * current_arch_machine_name; - char candidate_arch_machine_name[MACHINE_SIGNATURE_SIZE + 9]; - off_t current_arch_start; - - struct stat cache_stat, dir_stat; - - if (stat ((char *) cache_file, &cache_stat) < 0) - return; - - cache->fd = open ((char *) cache_file, O_RDONLY); - if (cache->fd == -1) - return; - - cache->updated = FcFalse; - - current_arch_machine_name = FcCacheMachineSignature (); - current_arch_start = FcCacheSkipToArch(cache->fd, - current_arch_machine_name); - if (current_arch_start < 0) - goto bail0; - - 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 bail0; - - while (1) - { - off_t targ; - - FcCacheReadString (cache->fd, name_buf, sizeof (name_buf)); - if (!strlen(name_buf)) - break; - - if (stat ((char *) name_buf, &dir_stat) < 0 || - dir_stat.st_mtime > cache_stat.st_mtime) - { - FcCache md; - - FcStrSetAdd (staleDirs, FcStrCopy (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; - - d->next = cache->dirs; - cache->dirs = d; - - d->name = FcStrCopy (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; - } - return; - - bail1: - for (d = cache->dirs; d; d = next) - { - next = d->next; - free (d); - } - cache->dirs = 0; - bail0: - close (cache->fd); - cache->fd = -1; - return; -} - -FcBool -FcGlobalCacheReadDir (FcFontSet *set, FcStrSet *dirs, FcGlobalCache * cache, const FcChar8 *dir, FcConfig *config) -{ - FcGlobalCacheDir *d; - FcBool ret = FcFalse; - - if (cache->fd == -1) - return FcFalse; - - for (d = cache->dirs; d; d = d->next) - { - if (strncmp (d->name, dir, strlen(dir)) == 0) - { - lseek (cache->fd, d->offset, SEEK_SET); - if (!FcDirCacheConsume (cache->fd, set)) - return FcFalse; - if (strcmp (d->name, dir) == 0) - ret = FcTrue; - } - } - - return ret; -} - -FcBool -FcGlobalCacheUpdate (FcGlobalCache *cache, - const FcChar8 *name, - FcFontSet *set) -{ - FcGlobalCacheDir * d; - - if (!set->nfont) - return FcTrue; - - for (d = cache->dirs; d; d = d->next) - { - if (strcmp(d->name, name) == 0) - break; - } - - if (!d) - { - d = malloc (sizeof (FcGlobalCacheDir)); - if (!d) - return FcFalse; - d->next = cache->dirs; - cache->dirs = d; - } - - cache->updated = FcTrue; - - d->name = FcStrCopy (name); - d->ent = FcDirCacheProduce (set, &d->metadata); - d->offset = 0; - return FcTrue; -} - -FcBool -FcGlobalCacheSave (FcGlobalCache *cache, - const FcChar8 *cache_file) -{ - int fd; - 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 - - atomic = FcAtomicCreate (cache_file); - if (!atomic) - goto bail0; - if (!FcAtomicLock (atomic)) - goto bail1; - fd = open ((char *) FcAtomicNewFile(atomic), O_RDWR | O_CREAT, - S_IRUSR | S_IWUSR); - if (fd == -1) - goto bail2; - - current_arch_machine_name = FcCacheMachineSignature (); - current_arch_start = FcCacheSkipToArch(fd, current_arch_machine_name); - if (current_arch_start < 0) - current_arch_start = FcCacheNextOffset (lseek(fd, 0, SEEK_END)); - - if (!FcCacheMoveDown(fd, current_arch_start)) - goto bail2; - - current_arch_start = lseek(fd, 0, SEEK_CUR); - if (ftruncate (fd, current_arch_start) == -1) - goto bail2; - - header = malloc (10 + strlen (current_arch_machine_name)); - if (!header) - goto bail1; - - truncate_to = current_arch_start + strlen(current_arch_machine_name) + 11; - for (dir = cache->dirs; dir; dir = dir->next) - { - truncate_to += strlen(dir->name) + 1; - truncate_to += sizeof (FcCache); - truncate_to = FcCacheNextOffset (current_arch_start + truncate_to); - truncate_to += dir->metadata.count; - } - truncate_to -= current_arch_start; - - sprintf (header, "%8x ", (int)truncate_to); - strcat (header, current_arch_machine_name); - if (!FcCacheWriteString (fd, header)) - goto bail1; - - 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, ""); - - if (close (fd) == -1) - goto bail3; - - if (!FcAtomicReplaceOrig (atomic)) - goto bail3; - - FcAtomicUnlock (atomic); - FcAtomicDestroy (atomic); - - cache->updated = FcFalse; - return FcTrue; - -bail3: - FcAtomicDeleteNew (atomic); -bail2: - FcAtomicUnlock (atomic); -bail1: - FcAtomicDestroy (atomic); -bail0: - return FcFalse; -} - -#define PAGESIZE 8192 /* * Find the next presumably-mmapable offset after the supplied file * position. */ -static int +static off_t FcCacheNextOffset(off_t w) { - if (w % PAGESIZE == 0) + static long pagesize = -1; + + if (w == -1) + return w; + + if (pagesize == -1) +#if defined (HAVE_SYSCONF) + pagesize = sysconf(_SC_PAGESIZE); +#else + pagesize = FC_HARDCODED_PAGESIZE; +#endif + if (w % pagesize == 0) return w; else - return ((w / PAGESIZE)+1)*PAGESIZE; + 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) +/* Does not check that the cache has the appropriate arch section. */ +FcBool +FcDirCacheValid (const FcChar8 *dir, FcConfig *config) { - char candidate_arch_machine_name_count[MACHINE_SIGNATURE_SIZE + 9]; - char * candidate_arch; - off_t current_arch_start = 0; + FILE *file; - /* 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); + file = FcDirCacheOpen (config, dir, NULL); - if (!bs || bs < strlen (candidate_arch_machine_name_count)) - return -1; + if (file == NULL) + return FcFalse; + fclose (file); - candidate_arch++; /* skip leading space */ + return FcTrue; +} - if (strcmp (candidate_arch, arch)==0) - return current_arch_start; - current_arch_start += bs; - } +#define CACHEBASE_LEN (1 + 32 + 1 + sizeof (FC_ARCHITECTURE) + sizeof (FC_CACHE_SUFFIX)) - return -1; -} +static const char bin2hex[] = { '0', '1', '2', '3', + '4', '5', '6', '7', + '8', '9', 'a', 'b', + 'c', 'd', 'e', 'f' }; -/* 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 -FcCacheMoveDown (int fd, off_t start) +static FcChar8 * +FcDirCacheBasename (const FcChar8 * dir, FcChar8 cache_base[CACHEBASE_LEN]) { - char * buf = malloc (8192); - char candidate_arch_machine_name[MACHINE_SIGNATURE_SIZE + 9]; - long bs; - int c, bytes_skipped; - - if (!buf) - return FcFalse; + unsigned char hash[16]; + FcChar8 *hex_hash; + int cnt; + struct MD5Context ctx; - 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; + MD5Init (&ctx); + MD5Update (&ctx, (unsigned char *)dir, strlen ((char *) dir)); - bs = strtol(candidate_arch_machine_name, 0, 16); - if (bs == 0) - goto done; + MD5Final (hash, &ctx); - bytes_skipped = 0; - do + cache_base[0] = '/'; + hex_hash = cache_base + 1; + for (cnt = 0; cnt < 16; ++cnt) { - 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; + hex_hash[2*cnt ] = bin2hex[hash[cnt] >> 4]; + hex_hash[2*cnt+1] = bin2hex[hash[cnt] & 0xf]; } - while (c > 0); - lseek (fd, start+bytes_skipped, SEEK_SET); - - done: - free (buf); - return FcTrue; + hex_hash[2*cnt] = 0; + strcat ((char *) cache_base, "-" FC_ARCHITECTURE FC_CACHE_SUFFIX); - bail: - free (buf); - return FcFalse; + return cache_base; } FcBool -FcDirCacheValid (const FcChar8 *dir) +FcDirCacheUnlink (const FcChar8 *dir, FcConfig *config) { - FcChar8 *cache_file = FcStrPlus (dir, (FcChar8 *) "/" FC_DIR_CACHE_FILE); - struct stat file_stat, dir_stat; + FcChar8 *cache_hashed = NULL; + FcChar8 cache_base[CACHEBASE_LEN]; + FcStrList *list; + FcChar8 *cache_dir; - if (stat ((char *) dir, &dir_stat) < 0) - { - FcStrFree (cache_file); + FcDirCacheBasename (dir, cache_base); + + list = FcStrListCreate (config->cacheDirs); + if (!list) return FcFalse; - } - if (stat ((char *) cache_file, &file_stat) < 0) + + while ((cache_dir = FcStrListNext (list))) { - FcStrFree (cache_file); - return FcFalse; + cache_hashed = FcStrPlus (cache_dir, cache_base); + if (!cache_hashed) + break; + (void) unlink ((char *) cache_hashed); } - FcStrFree (cache_file); - /* - * If the directory has been modified more recently than - * the cache file, the cache is not valid - */ - if (dir_stat.st_mtime - file_stat.st_mtime > 0) - return FcFalse; + FcStrListDone (list); + /* return FcFalse if something went wrong */ + if (cache_dir) + return FcFalse; return FcTrue; } static int -FcCacheReadDirs (FcConfig * config, FcGlobalCache * cache, - FcStrList *list, FcFontSet * set) +FcCacheReadDirs (FcConfig * config, + FcStrList *list, FcFontSet * set, FcStrSet *processed_dirs) { 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))) { - /* freed below */ - file = (FcChar8 *) malloc (strlen ((char *) dir) + 1 + FC_MAX_FILE_LEN + 1); - if (!file) - return FcFalse; + if (!FcConfigAcceptFilename (config, dir)) + continue; - strcpy ((char *) file, (char *) dir); - strcat ((char *) file, "/"); - base = file + strlen ((char *) file); + /* 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. + */ + + if (FcStrSetMember (processed_dirs, dir)) + continue; + if (!FcStrSetAdd (processed_dirs, dir)) + continue; subdirs = FcStrSetCreate (); if (!subdirs) { fprintf (stderr, "Can't create directory set\n"); ret++; - free (file); continue; } - if (access ((char *) dir, X_OK) < 0) - { - switch (errno) { - case ENOENT: - case ENOTDIR: - case EACCES: - break; - default: - fprintf (stderr, "\"%s\": ", dir); - perror (""); - ret++; - } - 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); - } + 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++; - free (file); continue; } - ret += FcCacheReadDirs (config, cache, sublist, set); - free (file); + ret += FcCacheReadDirs (config, sublist, set, processed_dirs); } FcStrListDone (list); return ret; } FcFontSet * -FcCacheRead (FcConfig *config, FcGlobalCache * cache) +FcCacheRead (FcConfig *config) { - FcFontSet * s = FcFontSetCreate(); + FcFontSet *s = FcFontSetCreate(); + FcStrSet *processed_dirs; + if (!s) return 0; - if (FcCacheReadDirs (config, cache, FcConfigGetConfigDirs (config), s)) + processed_dirs = FcStrSetCreate(); + if (!processed_dirs) goto bail; + if (FcCacheReadDirs (config, FcConfigGetConfigDirs (config), s, processed_dirs)) + goto bail1; + + FcStrSetDestroy (processed_dirs); return s; + bail1: + FcStrSetDestroy (processed_dirs); bail: FcFontSetDestroy (s); return 0; } +/* Opens the cache file for 'dir' for reading. + * This searches the list of cache dirs for the relevant cache file, + * returning the first one found. + */ +static FILE * +FcDirCacheOpen (FcConfig *config, const FcChar8 *dir, FcChar8 **cache_path) +{ + FILE *file = NULL; + FcChar8 *cache_hashed = NULL; + FcChar8 cache_base[CACHEBASE_LEN]; + FcStrList *list; + FcChar8 *cache_dir; + struct stat file_stat, dir_stat; + + if (stat ((char *) dir, &dir_stat) < 0) + return NULL; + + FcDirCacheBasename (dir, cache_base); + + list = FcStrListCreate (config->cacheDirs); + if (!list) + return NULL; + + while ((cache_dir = FcStrListNext (list))) + { + cache_hashed = FcStrPlus (cache_dir, cache_base); + if (!cache_hashed) + break; + file = fopen((char *) cache_hashed, "rb"); + if (file != NULL) { + if (fstat (fileno (file), &file_stat) >= 0 && + dir_stat.st_mtime <= file_stat.st_mtime) + { + break; + } + fclose (file); + file = NULL; + } + FcStrFree (cache_hashed); + cache_hashed = NULL; + } + FcStrListDone (list); + + if (file == NULL) + return NULL; + + if (cache_path) + *cache_path = cache_hashed; + else + FcStrFree (cache_hashed); + + return file; +} + /* read serialized state from the cache file */ -static FcBool -FcDirCacheRead (FcFontSet * set, FcStrSet * dirs, const FcChar8 *dir) +FcBool +FcDirCacheConsume (FILE *file, FcFontSet *set, FcStrSet *dirs, + const FcChar8 *dir, char *dirname) { - FcChar8 *cache_file = FcStrPlus (dir, (FcChar8 *) "/" FC_DIR_CACHE_FILE); - int fd; - char * current_arch_machine_name; - char candidate_arch_machine_name[9+MACHINE_SIGNATURE_SIZE]; - off_t current_arch_start = 0; - FcChar8 subdirName[FC_MAX_FILE_LEN + 1 + 12 + 1]; - - if (!cache_file) - goto bail; + FcCache metadata; + void *current_dir_block; + char subdir_name[FC_MAX_FILE_LEN + 1 + 12 + 1]; + int i; - current_arch_machine_name = FcCacheMachineSignature(); - fd = open(cache_file, O_RDONLY); - if (fd == -1) + if (fread(&metadata, sizeof(FcCache), 1, file) != 1) + goto bail; + if (metadata.magic != FC_CACHE_MAGIC) goto bail; - current_arch_start = FcCacheSkipToArch(fd, current_arch_machine_name); - if (current_arch_start < 0) - goto bail1; + /* skip directory name; it's just for fc-cat */ + if (!FcCacheReadString (file, subdir_name, sizeof (subdir_name))) + goto bail; + + if (dirname) + strcpy (dirname, subdir_name); - lseek (fd, current_arch_start, SEEK_SET); - if (FcCacheReadString (fd, candidate_arch_machine_name, - sizeof (candidate_arch_machine_name)) == 0) - goto bail1; + for (i = 0; i < metadata.subdirs; i++) { + if (!FcCacheReadString (file, subdir_name, sizeof (subdir_name))) + goto bail; + FcStrSetAdd (dirs, (FcChar8 *)subdir_name); + } + + if (metadata.count) + { + int fd = fileno (file); +#if defined(HAVE_MMAP) || defined(__CYGWIN__) + current_dir_block = mmap (0, metadata.count, + PROT_READ, MAP_SHARED, fd, metadata.pos); + if (current_dir_block == MAP_FAILED) + goto bail; +#elif defined(_WIN32) + { + HANDLE hFileMap; - while (strlen(FcCacheReadString (fd, subdirName, sizeof (subdirName))) > 0) - FcStrSetAdd (dirs, subdirName); + hFileMap = CreateFileMapping((HANDLE) _get_osfhandle(fd), NULL, PAGE_READONLY, 0, 0, NULL); + if (hFileMap == NULL) + goto bail; + + current_dir_block = MapViewOfFile (hFileMap, FILE_MAP_READ, 0, metadata.pos, metadata.count); + if (current_dir_block == NULL) + { + CloseHandle (hFileMap); + goto bail; + } + } +#else + if (lseek (fd, metatdata.pos, SEEK_SET) == -1) + goto bail; + + current_dir_block = malloc (metadata.count); + if (!current_dir_block) + goto bail; + + /* could also use CreateMappedViewOfFile under MinGW... */ + if (read (fd, current_dir_block, metadata.count) != metadata.count) + { + free (current_dir_block); + goto bail; + } +#endif + FcCacheAddBankDir (metadata.bank, (char *) dir); + if (!FcFontSetUnserialize (&metadata, set, current_dir_block)) + goto bail; + } - if (!FcDirCacheConsume (fd, set)) - goto bail1; - - close(fd); - free (cache_file); return FcTrue; - bail1: - close (fd); bail: - free (cache_file); return FcFalse; } -static FcBool -FcDirCacheConsume (int fd, FcFontSet *set) +FcBool +FcDirCacheRead (FcFontSet * set, FcStrSet * dirs, + const FcChar8 *dir, FcConfig *config) { - FcCache metadata; - void * current_dir_block; - off_t pos; + FILE *file; - read(fd, &metadata, sizeof(FcCache)); - if (metadata.magic != FC_CACHE_MAGIC) - return FcFalse; + file = FcDirCacheOpen (config, dir, NULL); + if (file == NULL) + goto bail; - if (!metadata.count) - return FcTrue; + if (!FcDirCacheConsume (file, set, dirs, dir, NULL)) + goto bail1; - 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; + if (config) + FcConfigAddFontDir (config, (FcChar8 *)dir); - if (!FcFontSetUnserialize (metadata, set, current_dir_block)) - return FcFalse; - + fclose (file); return FcTrue; + +bail1: + fclose (file); +bail: + return FcFalse; } + static void * FcDirCacheProduce (FcFontSet *set, FcCache *metadata) { void * current_dir_block, * final_dir_block; - static int rand_state = 0; - int bank; + static unsigned int rand_state = 0; + int bank, needed_bytes_no_align; +#if defined (HAVE_RAND_R) if (!rand_state) rand_state = time(0L); bank = rand_r(&rand_state); while (FcCacheHaveBank(bank)) bank = rand_r(&rand_state); +#else + if (!rand_state) + { + rand_state = 1; + srand (time (0L)); + } + bank = rand(); + + while (FcCacheHaveBank(bank)) + bank = rand(); +#endif memset (metadata, 0, sizeof(FcCache)); FcFontSetNewBank(); - metadata->count = FcFontSetNeededBytes (set); + needed_bytes_no_align = FcFontSetNeededBytes (set); + metadata->count = needed_bytes_no_align + + FcFontSetNeededBytesAlign (); metadata->magic = FC_CACHE_MAGIC; metadata->bank = bank; - if (!metadata->count) /* not a failure, no fonts to write */ + 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 ((char *)current_dir_block + metadata->count != final_dir_block) + if ((void *)((char *)current_dir_block+metadata->count) < final_dir_block) goto bail; if (!FcFontSetSerialize (bank, set)) @@ -726,123 +496,158 @@ FcDirCacheProduce (FcFontSet *set, FcCache *metadata) return 0; } +static FcBool +FcMakeDirectory (const FcChar8 *dir) +{ + FcChar8 *parent; + FcBool ret; + + if (strlen ((char *) dir) == 0) + return FcFalse; + + 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; +} + /* write serialized state to the cache file */ FcBool -FcDirCacheWrite (FcFontSet *set, FcStrSet *dirs, const FcChar8 *dir) +FcDirCacheWrite (FcFontSet *set, FcStrSet *dirs, const FcChar8 *dir, FcConfig *config) { - FcChar8 *cache_file = FcStrPlus (dir, (FcChar8 *) "/" FC_DIR_CACHE_FILE); - int fd, i; - FcCache metadata; - off_t current_arch_start = 0, truncate_to; - char * current_arch_machine_name, * header; - void * current_dir_block; - - if (!cache_file) - goto bail; - - current_dir_block = FcDirCacheProduce (set, &metadata); + FcChar8 cache_base[CACHEBASE_LEN]; + FcChar8 *cache_hashed; + int fd, i; + FcAtomic *atomic; + FcCache metadata; + void *current_dir_block = 0; + FcStrList *list; + FcChar8 *cache_dir = NULL; + FcChar8 *test_dir; + off_t header_len; - if (!metadata.count) - { - unlink (cache_file); - free (cache_file); - return FcTrue; + /* + * Write it to the first directory in the list which is writable + */ + + list = FcStrListCreate (config->cacheDirs); + if (!list) + return FcFalse; + while ((test_dir = FcStrListNext (list))) { + if (access ((char *) test_dir, W_OK|X_OK) == 0) + { + cache_dir = test_dir; + break; + } + else + { + /* + * 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; + } + } + } } + FcStrListDone (list); + if (!cache_dir) + return FcFalse; + FcDirCacheBasename (dir, cache_base); + cache_hashed = FcStrPlus (cache_dir, cache_base); + if (!cache_hashed) + return FcFalse; - if (!current_dir_block) - goto bail; + current_dir_block = FcDirCacheProduce (set, &metadata); + + if (metadata.count && !current_dir_block) + 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); - fd = open(cache_file, O_RDWR | O_CREAT, 0666); - if (fd == -1) - goto bail0; - - current_arch_machine_name = FcCacheMachineSignature (); - current_arch_start = FcCacheSkipToArch(fd, current_arch_machine_name); - if (current_arch_start < 0) - current_arch_start = FcCacheNextOffset (lseek(fd, 0, SEEK_END)); - - if (!FcCacheMoveDown(fd, current_arch_start)) - goto bail0; - - current_arch_start = lseek(fd, 0, SEEK_CUR); - if (ftruncate (fd, current_arch_start) == -1) - goto bail0; - - /* now write the address of the next offset */ - truncate_to = FcCacheNextOffset (FcCacheNextOffset (current_arch_start + sizeof (FcCache)) + metadata.count) - current_arch_start; - header = malloc (10 + strlen (current_arch_machine_name)); - if (!header) - goto bail0; - sprintf (header, "%8x ", (int)truncate_to); - strcat (header, current_arch_machine_name); - if (!FcCacheWriteString (fd, header)) + atomic = FcAtomicCreate ((FcChar8 *)cache_hashed); + if (!atomic) goto bail1; - for (i = 0; i < dirs->size; i++) - FcCacheWriteString (fd, dirs->strs[i]); - FcCacheWriteString (fd, ""); + if (!FcAtomicLock (atomic)) + goto bail2; - write (fd, &metadata, sizeof(FcCache)); - lseek (fd, FcCacheNextOffset (lseek(fd, 0, SEEK_END)), SEEK_SET); - write (fd, current_dir_block, metadata.count); - free (current_dir_block); + fd = open((char *)FcAtomicNewFile (atomic), O_RDWR | O_CREAT | O_BINARY, 0666); + if (fd == -1) + goto bail3; + + /* + * Compute file header length -- the FcCache followed by the subdir names + */ + header_len = sizeof (FcCache); + header_len += strlen ((char *) dir) + 1; + for (i = 0; i < dirs->size; i++) + header_len += strlen ((char *)dirs->strs[i]) + 1; + + metadata.pos = FcCacheNextOffset (lseek (fd, 0, SEEK_CUR) + header_len); + metadata.subdirs = dirs->size; + + /* + * Write out the header + */ + if (write (fd, &metadata, sizeof(FcCache)) != sizeof(FcCache)) + { + perror("write metadata"); + goto bail5; + } + + FcCacheWriteString (fd, (char *) dir); + + for (i = 0; i < dirs->size; i++) + FcCacheWriteString (fd, (char *)dirs->strs[i]); - /* this actually serves to pad out the cache file, if needed */ - if (ftruncate (fd, current_arch_start + truncate_to) == -1) - goto bail1; + if (metadata.count) + { + if (lseek (fd, metadata.pos, SEEK_SET) != metadata.pos) + perror("lseek"); + else if (write (fd, current_dir_block, metadata.count) != + metadata.count) + perror("write current_dir_block"); + free (current_dir_block); + current_dir_block = 0; + } close(fd); + if (!FcAtomicReplaceOrig(atomic)) + goto bail3; + FcStrFree ((FcChar8 *)cache_hashed); + FcAtomicUnlock (atomic); + FcAtomicDestroy (atomic); return FcTrue; + bail5: + close (fd); + bail3: + FcAtomicUnlock (atomic); + bail2: + FcAtomicDestroy (atomic); bail1: - free (header); - bail0: - free (current_dir_block); - bail: - unlink (cache_file); - free (cache_file); + FcStrFree ((FcChar8 *)cache_hashed); + if (current_dir_block) + free (current_dir_block); return FcFalse; } -static char * -FcCacheMachineSignature () -{ - static char buf[MACHINE_SIGNATURE_SIZE]; - int 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\n", - m[0], m[1], m[2], m[3], - sizeof (char), - sizeof (char *), - sizeof (int), - sizeof (FcPattern), - sizeof (FcPatternEltPtr), - sizeof (struct _FcPatternElt *), - sizeof (FcPatternElt), - sizeof (FcObjectPtr), - sizeof (FcValueListPtr), - sizeof (FcValue), - sizeof (FcValueBinding), - sizeof (struct _FcValueList *), - sizeof (FcCharSet), - sizeof (FcCharLeaf **), - sizeof (FcChar16 *), - sizeof (FcChar16), - sizeof (FcCharLeaf), - sizeof (FcChar32), - sizeof (FcCache)); - - return buf; -} - static int banks_ptr = 0, banks_alloc = 0; -static int * bankId = 0; +int * _fcBankId = 0, * _fcBankIdx = 0; +static const char ** bankDirs = 0; static FcBool FcCacheHaveBank (int bank) @@ -853,37 +658,315 @@ FcCacheHaveBank (int bank) return FcTrue; for (i = 0; i < banks_ptr; i++) - if (bankId[i] == bank) + if (_fcBankId[i] == bank) return FcTrue; return FcFalse; } int -FcCacheBankToIndex (int bank) +FcCacheBankToIndexMTF (int bank) { - static int lastBank = FC_BANK_DYNAMIC, lastIndex = -1; - int i; - int * b; - - if (bank == lastBank) - return lastIndex; + int i, j; for (i = 0; i < banks_ptr; i++) - if (bankId[i] == bank) - return 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) { - b = realloc (bankId, (banks_alloc + 4) * sizeof(int)); + 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; - bankId = b; banks_alloc += 4; } i = banks_ptr++; - bankId[i] = bank; + _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 + * written by Colin Plumb in 1993, no copyright is claimed. + * This code is in the public domain; do with it what you wish. + * + * Equivalent code is available from RSA Data Security, Inc. + * This code has been tested against that, and is equivalent, + * except that you don't need to include two pages of legalese + * with every copy. + * + * To compute the message digest of a chunk of bytes, declare an + * MD5Context structure, pass it to MD5Init, call MD5Update as + * needed on buffers full of bytes, and then call MD5Final, which + * will fill a supplied 16-byte array with the digest. + */ + +#ifndef HIGHFIRST +#define byteReverse(buf, len) /* Nothing */ +#else +/* + * Note: this code is harmless on little-endian machines. + */ +void byteReverse(unsigned char *buf, unsigned longs) +{ + FcChar32 t; + do { + t = (FcChar32) ((unsigned) buf[3] << 8 | buf[2]) << 16 | + ((unsigned) buf[1] << 8 | buf[0]); + *(FcChar32 *) buf = t; + buf += 4; + } while (--longs); +} +#endif + +/* + * Start MD5 accumulation. Set bit count to 0 and buffer to mysterious + * initialization constants. + */ +static void MD5Init(struct MD5Context *ctx) +{ + ctx->buf[0] = 0x67452301; + ctx->buf[1] = 0xefcdab89; + ctx->buf[2] = 0x98badcfe; + ctx->buf[3] = 0x10325476; + + ctx->bits[0] = 0; + ctx->bits[1] = 0; +} + +/* + * Update context to reflect the concatenation of another buffer full + * of bytes. + */ +static void MD5Update(struct MD5Context *ctx, unsigned char *buf, unsigned len) +{ + FcChar32 t; + + /* Update bitcount */ + + t = ctx->bits[0]; + if ((ctx->bits[0] = t + ((FcChar32) len << 3)) < t) + ctx->bits[1]++; /* Carry from low to high */ + ctx->bits[1] += len >> 29; + + t = (t >> 3) & 0x3f; /* Bytes already in shsInfo->data */ + + /* Handle any leading odd-sized chunks */ + + if (t) { + unsigned char *p = (unsigned char *) ctx->in + t; + + t = 64 - t; + if (len < t) { + memcpy(p, buf, len); + return; + } + memcpy(p, buf, t); + byteReverse(ctx->in, 16); + MD5Transform(ctx->buf, (FcChar32 *) ctx->in); + buf += t; + len -= t; + } + /* Process data in 64-byte chunks */ + + while (len >= 64) { + memcpy(ctx->in, buf, 64); + byteReverse(ctx->in, 16); + MD5Transform(ctx->buf, (FcChar32 *) ctx->in); + buf += 64; + len -= 64; + } + + /* Handle any remaining bytes of data. */ + + memcpy(ctx->in, buf, len); +} + +/* + * Final wrapup - pad to 64-byte boundary with the bit pattern + * 1 0* (64-bit count of bits processed, MSB-first) + */ +static void MD5Final(unsigned char digest[16], struct MD5Context *ctx) +{ + unsigned count; + unsigned char *p; + + /* Compute number of bytes mod 64 */ + count = (ctx->bits[0] >> 3) & 0x3F; + + /* Set the first char of padding to 0x80. This is safe since there is + always at least one byte free */ + p = ctx->in + count; + *p++ = 0x80; + + /* Bytes of padding needed to make 64 bytes */ + count = 64 - 1 - count; + + /* Pad out to 56 mod 64 */ + if (count < 8) { + /* Two lots of padding: Pad the first block to 64 bytes */ + memset(p, 0, count); + byteReverse(ctx->in, 16); + MD5Transform(ctx->buf, (FcChar32 *) ctx->in); + + /* Now fill the next block with 56 bytes */ + memset(ctx->in, 0, 56); + } else { + /* Pad block to 56 bytes */ + memset(p, 0, count - 8); + } + byteReverse(ctx->in, 14); + + /* Append length in bits and transform */ + ((FcChar32 *) ctx->in)[14] = ctx->bits[0]; + ((FcChar32 *) ctx->in)[15] = ctx->bits[1]; + + MD5Transform(ctx->buf, (FcChar32 *) ctx->in); + byteReverse((unsigned char *) ctx->buf, 4); + memcpy(digest, ctx->buf, 16); + memset(ctx, 0, sizeof(ctx)); /* In case it's sensitive */ +} + + +/* The four core functions - F1 is optimized somewhat */ + +/* #define F1(x, y, z) (x & y | ~x & z) */ +#define F1(x, y, z) (z ^ (x & (y ^ z))) +#define F2(x, y, z) F1(z, x, y) +#define F3(x, y, z) (x ^ y ^ z) +#define F4(x, y, z) (y ^ (x | ~z)) + +/* This is the central step in the MD5 algorithm. */ +#define MD5STEP(f, w, x, y, z, data, s) \ + ( w += f(x, y, z) + data, w = w<>(32-s), w += x ) + +/* + * The core of the MD5 algorithm, this alters an existing MD5 hash to + * reflect the addition of 16 longwords of new data. MD5Update blocks + * the data and converts bytes into longwords for this routine. + */ +static void MD5Transform(FcChar32 buf[4], FcChar32 in[16]) +{ + register FcChar32 a, b, c, d; + + a = buf[0]; + b = buf[1]; + c = buf[2]; + d = buf[3]; + + MD5STEP(F1, a, b, c, d, in[0] + 0xd76aa478, 7); + MD5STEP(F1, d, a, b, c, in[1] + 0xe8c7b756, 12); + MD5STEP(F1, c, d, a, b, in[2] + 0x242070db, 17); + MD5STEP(F1, b, c, d, a, in[3] + 0xc1bdceee, 22); + MD5STEP(F1, a, b, c, d, in[4] + 0xf57c0faf, 7); + MD5STEP(F1, d, a, b, c, in[5] + 0x4787c62a, 12); + MD5STEP(F1, c, d, a, b, in[6] + 0xa8304613, 17); + MD5STEP(F1, b, c, d, a, in[7] + 0xfd469501, 22); + MD5STEP(F1, a, b, c, d, in[8] + 0x698098d8, 7); + MD5STEP(F1, d, a, b, c, in[9] + 0x8b44f7af, 12); + MD5STEP(F1, c, d, a, b, in[10] + 0xffff5bb1, 17); + MD5STEP(F1, b, c, d, a, in[11] + 0x895cd7be, 22); + MD5STEP(F1, a, b, c, d, in[12] + 0x6b901122, 7); + MD5STEP(F1, d, a, b, c, in[13] + 0xfd987193, 12); + MD5STEP(F1, c, d, a, b, in[14] + 0xa679438e, 17); + MD5STEP(F1, b, c, d, a, in[15] + 0x49b40821, 22); + + MD5STEP(F2, a, b, c, d, in[1] + 0xf61e2562, 5); + MD5STEP(F2, d, a, b, c, in[6] + 0xc040b340, 9); + MD5STEP(F2, c, d, a, b, in[11] + 0x265e5a51, 14); + MD5STEP(F2, b, c, d, a, in[0] + 0xe9b6c7aa, 20); + MD5STEP(F2, a, b, c, d, in[5] + 0xd62f105d, 5); + MD5STEP(F2, d, a, b, c, in[10] + 0x02441453, 9); + MD5STEP(F2, c, d, a, b, in[15] + 0xd8a1e681, 14); + MD5STEP(F2, b, c, d, a, in[4] + 0xe7d3fbc8, 20); + MD5STEP(F2, a, b, c, d, in[9] + 0x21e1cde6, 5); + MD5STEP(F2, d, a, b, c, in[14] + 0xc33707d6, 9); + MD5STEP(F2, c, d, a, b, in[3] + 0xf4d50d87, 14); + MD5STEP(F2, b, c, d, a, in[8] + 0x455a14ed, 20); + MD5STEP(F2, a, b, c, d, in[13] + 0xa9e3e905, 5); + MD5STEP(F2, d, a, b, c, in[2] + 0xfcefa3f8, 9); + MD5STEP(F2, c, d, a, b, in[7] + 0x676f02d9, 14); + MD5STEP(F2, b, c, d, a, in[12] + 0x8d2a4c8a, 20); + + MD5STEP(F3, a, b, c, d, in[5] + 0xfffa3942, 4); + MD5STEP(F3, d, a, b, c, in[8] + 0x8771f681, 11); + MD5STEP(F3, c, d, a, b, in[11] + 0x6d9d6122, 16); + MD5STEP(F3, b, c, d, a, in[14] + 0xfde5380c, 23); + MD5STEP(F3, a, b, c, d, in[1] + 0xa4beea44, 4); + MD5STEP(F3, d, a, b, c, in[4] + 0x4bdecfa9, 11); + MD5STEP(F3, c, d, a, b, in[7] + 0xf6bb4b60, 16); + MD5STEP(F3, b, c, d, a, in[10] + 0xbebfbc70, 23); + MD5STEP(F3, a, b, c, d, in[13] + 0x289b7ec6, 4); + MD5STEP(F3, d, a, b, c, in[0] + 0xeaa127fa, 11); + MD5STEP(F3, c, d, a, b, in[3] + 0xd4ef3085, 16); + MD5STEP(F3, b, c, d, a, in[6] + 0x04881d05, 23); + MD5STEP(F3, a, b, c, d, in[9] + 0xd9d4d039, 4); + MD5STEP(F3, d, a, b, c, in[12] + 0xe6db99e5, 11); + MD5STEP(F3, c, d, a, b, in[15] + 0x1fa27cf8, 16); + MD5STEP(F3, b, c, d, a, in[2] + 0xc4ac5665, 23); + + MD5STEP(F4, a, b, c, d, in[0] + 0xf4292244, 6); + MD5STEP(F4, d, a, b, c, in[7] + 0x432aff97, 10); + MD5STEP(F4, c, d, a, b, in[14] + 0xab9423a7, 15); + MD5STEP(F4, b, c, d, a, in[5] + 0xfc93a039, 21); + MD5STEP(F4, a, b, c, d, in[12] + 0x655b59c3, 6); + MD5STEP(F4, d, a, b, c, in[3] + 0x8f0ccc92, 10); + MD5STEP(F4, c, d, a, b, in[10] + 0xffeff47d, 15); + MD5STEP(F4, b, c, d, a, in[1] + 0x85845dd1, 21); + MD5STEP(F4, a, b, c, d, in[8] + 0x6fa87e4f, 6); + MD5STEP(F4, d, a, b, c, in[15] + 0xfe2ce6e0, 10); + MD5STEP(F4, c, d, a, b, in[6] + 0xa3014314, 15); + MD5STEP(F4, b, c, d, a, in[13] + 0x4e0811a1, 21); + MD5STEP(F4, a, b, c, d, in[4] + 0xf7537e82, 6); + MD5STEP(F4, d, a, b, c, in[11] + 0xbd3af235, 10); + MD5STEP(F4, c, d, a, b, in[2] + 0x2ad7d2bb, 15); + MD5STEP(F4, b, c, d, a, in[9] + 0xeb86d391, 21); + + buf[0] += a; + buf[1] += b; + buf[2] += c; + buf[3] += d; +}