X-Git-Url: https://git.wh0rd.org/?a=blobdiff_plain;f=src%2Ffccache.c;h=2d4a4377ba42145cc5ca6b25239db1dc96f1e197;hb=HEAD;hp=84915515d528427f216c07ed9c8c6869964cb811;hpb=3cf9f5cec386ce97bb3cdd1dfe78d0d6999243ea;p=fontconfig.git diff --git a/src/fccache.c b/src/fccache.c index 8491551..2d4a437 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 * @@ -8,63 +6,41 @@ * documentation for any purpose is hereby granted without fee, provided that * the above copyright notice appear in all copies and that both that * copyright notice and this permission notice appear in supporting - * documentation, and that the name of Keith Packard not be used in + * documentation, and that the name of the author(s) not be used in * advertising or publicity pertaining to distribution of the software without - * specific, written prior permission. Keith Packard makes no + * specific, written prior permission. The authors make no * representations about the suitability of this software for any purpose. It * is provided "as is" without express or implied warranty. * - * KEITH PACKARD DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, + * THE AUTHOR(S) DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO - * EVENT SHALL KEITH PACKARD BE LIABLE FOR ANY SPECIAL, INDIRECT OR + * EVENT SHALL THE AUTHOR(S) BE LIABLE FOR ANY SPECIAL, INDIRECT OR * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR * PERFORMANCE OF THIS SOFTWARE. */ +#include "fcint.h" +#include "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 (const FcChar8 * dir); - -static char * -FcDirCacheHashName (char * cache_file, int collisions); - -static off_t -FcCacheSkipToArch (int fd, const char * arch); - -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, FcConfig *config); - -static int -FcCacheNextOffset(off_t w); - -static char * -FcCacheMachineSignature (void); +#include +#if defined(HAVE_MMAP) || defined(__CYGWIN__) +# include +# include +#elif defined(_WIN32) +# define _WIN32_WINNT 0x0500 +# include +#endif -static FcBool -FcCacheHaveBank (int bank); +#ifndef O_BINARY +#define O_BINARY 0 +#endif -static void -FcCacheAddBankDir (int bank, const char * dir); struct MD5Context { FcChar32 buf[4]; @@ -73,1300 +49,982 @@ struct MD5Context { }; static void MD5Init(struct MD5Context *ctx); -static void MD5Update(struct MD5Context *ctx, unsigned char *buf, unsigned len); +static void MD5Update(struct MD5Context *ctx, const 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 char * -FcCacheReadString (int fd, char *dest, int len) -{ - FcChar8 c; - FcBool escape; - int size; - int i; +#define CACHEBASE_LEN (1 + 32 + 1 + sizeof (FC_ARCHITECTURE) + sizeof (FC_CACHE_SUFFIX)) - 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; - if (c == '\0') - return dest; - escape = FcFalse; - } - return 0; -} +#ifdef _WIN32 -static void -FcCacheSkipString (int fd) -{ - FcChar8 c; - FcBool escape; +#include - escape = FcFalse; - while (read (fd, &c, 1) == 1) - { - if (!escape) - { - switch (c) { - case '"': - c = '\0'; - break; - case '\\': - escape = FcTrue; - continue; - } - } - if (c == '\0') - return; - escape = FcFalse; - } - return; -} +#ifdef __GNUC__ +typedef long long INT64; +#define EPOCH_OFFSET 11644473600ll +#else +#define EPOCH_OFFSET 11644473600i64 +typedef __int64 INT64; +#endif -static FcBool -FcCacheWriteString (int fd, const char *chars) -{ - if (write (fd, chars, strlen(chars)+1) != strlen(chars)+1) - return FcFalse; - return FcTrue; -} +/* Workaround for problems in the stat() in the Microsoft C library: + * + * 1) stat() uses FindFirstFile() to get the file + * attributes. Unfortunately this API doesn't return correct values + * for modification time of a directory until some time after a file + * or subdirectory has been added to the directory. (This causes + * run-test.sh to fail, for instance.) GetFileAttributesEx() is + * better, it returns the updated timestamp right away. + * + * 2) stat() does some strange things related to backward + * compatibility with the local time timestamps on FAT volumes and + * daylight saving time. This causes problems after the switches + * to/from daylight saving time. See + * http://bugzilla.gnome.org/show_bug.cgi?id=154968 , especially + * comment #30, and http://www.codeproject.com/datetime/dstbugs.asp . + * We don't need any of that, FAT and Win9x are as good as dead. So + * just use the UTC timestamps from NTFS, converted to the Unix epoch. + */ -static void -FcGlobalCacheDirDestroy (FcGlobalCacheDir *d) +int +FcStat (const char *file, struct stat *statb) { - FcMemFree (FC_MEM_STRING, strlen (d->name)+1); - free (d->name); - FcMemFree (FC_MEM_CACHE, sizeof (FcGlobalCacheDir)); - free (d); -} + WIN32_FILE_ATTRIBUTE_DATA wfad; + char full_path_name[MAX_PATH]; + char *basename; + DWORD rc; -FcGlobalCache * -FcGlobalCacheCreate (void) -{ - FcGlobalCache *cache; + if (!GetFileAttributesEx (file, GetFileExInfoStandard, &wfad)) + return -1; - 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; -} + statb->st_dev = 0; -void -FcGlobalCacheDestroy (FcGlobalCache *cache) -{ - FcGlobalCacheDir *d, *next; + /* Calculate a pseudo inode number as a hash of the full path name. + * Call GetLongPathName() to get the spelling of the path name as it + * is on disk. + */ + rc = GetFullPathName (file, sizeof (full_path_name), full_path_name, &basename); + if (rc == 0 || rc > sizeof (full_path_name)) + return -1; - for (d = cache->dirs; d; d = next) - { - next = d->next; - FcGlobalCacheDirDestroy (d); - } - FcMemFree (FC_MEM_CACHE, sizeof (FcGlobalCache)); - free (cache); -} + rc = GetLongPathName (full_path_name, full_path_name, sizeof (full_path_name)); + statb->st_ino = FcStringHash (full_path_name); -void -FcGlobalCacheLoad (FcGlobalCache *cache, - FcStrSet *staleDirs, - const FcChar8 *cache_file, - 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; + statb->st_mode = _S_IREAD | _S_IWRITE; + statb->st_mode |= (statb->st_mode >> 3) | (statb->st_mode >> 6); - struct stat cache_stat, dir_stat; + if (wfad.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY) + statb->st_mode |= _S_IFDIR; + else + statb->st_mode |= _S_IFREG; - if (stat ((char *) cache_file, &cache_stat) < 0) - return; + statb->st_nlink = 1; + statb->st_uid = statb->st_gid = 0; + statb->st_rdev = 0; - cache->fd = open ((char *) cache_file, O_RDONLY); - if (cache->fd == -1) - return; + if (wfad.nFileSizeHigh > 0) + return -1; + statb->st_size = wfad.nFileSizeLow; - cache->updated = FcFalse; + statb->st_atime = (*(INT64 *)&wfad.ftLastAccessTime)/10000000 - EPOCH_OFFSET; + statb->st_mtime = (*(INT64 *)&wfad.ftLastWriteTime)/10000000 - EPOCH_OFFSET; + statb->st_ctime = statb->st_mtime; - FcCacheReadString (cache->fd, name_buf, sizeof (name_buf)); - if (strcmp (name_buf, FC_GLOBAL_MAGIC_COOKIE) != 0) - return; + return 0; +} - current_arch_machine_name = FcCacheMachineSignature (); - current_arch_start = FcCacheSkipToArch(cache->fd, - current_arch_machine_name); - if (current_arch_start < 0) - goto bail_and_destroy; +#else - 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; +int +FcStat (const char *file, struct stat *statb) +{ + return stat ((char *) file, statb); +} - while (1) - { - off_t targ; +#endif - FcCacheReadString (cache->fd, name_buf, sizeof (name_buf)); - if (!strlen(name_buf)) - break; +static const char bin2hex[] = { '0', '1', '2', '3', + '4', '5', '6', '7', + '8', '9', 'a', 'b', + 'c', 'd', 'e', 'f' }; - /* 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; +static FcChar8 * +FcDirCacheBasename (const FcChar8 * dir, FcChar8 cache_base[CACHEBASE_LEN]) +{ + unsigned char hash[16]; + FcChar8 *hex_hash; + int cnt; + struct MD5Context ctx; - d->next = cache->dirs; - cache->dirs = d; + MD5Init (&ctx); + MD5Update (&ctx, (const unsigned char *)dir, strlen ((const char *) dir)); - 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; - } - return; + MD5Final (hash, &ctx); - bail1: - for (d = cache->dirs; d; d = next) + cache_base[0] = '/'; + hex_hash = cache_base + 1; + for (cnt = 0; cnt < 16; ++cnt) { - next = d->next; - free (d); + hex_hash[2*cnt ] = bin2hex[hash[cnt] >> 4]; + hex_hash[2*cnt+1] = bin2hex[hash[cnt] & 0xf]; } - 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); - - return; + hex_hash[2*cnt] = 0; + strcat ((char *) cache_base, "-" FC_ARCHITECTURE FC_CACHE_SUFFIX); + return cache_base; } FcBool -FcGlobalCacheReadDir (FcFontSet *set, FcStrSet *dirs, FcGlobalCache * cache, const char *dir, FcConfig *config) +FcDirCacheUnlink (const FcChar8 *dir, FcConfig *config) { - FcGlobalCacheDir *d; - FcBool ret = FcFalse; + FcChar8 *cache_hashed = NULL; + FcChar8 cache_base[CACHEBASE_LEN]; + FcStrList *list; + FcChar8 *cache_dir; + + FcDirCacheBasename (dir, cache_base); - if (cache->fd == -1) + list = FcStrListCreate (config->cacheDirs); + if (!list) + return FcFalse; + + while ((cache_dir = FcStrListNext (list))) + { + cache_hashed = FcStrPlus (cache_dir, cache_base); + if (!cache_hashed) + break; + (void) unlink ((char *) cache_hashed); + FcStrFree (cache_hashed); + } + FcStrListDone (list); + /* return FcFalse if something went wrong */ + if (cache_dir) return FcFalse; + return FcTrue; +} - if (!(dir = (char *)FcConfigNormalizeFontDir (config, (FcChar8 *)dir))) - return FcFalse; /* non-existing directory */ +static int +FcDirCacheOpenFile (const FcChar8 *cache_file, struct stat *file_stat) +{ + int fd; - for (d = cache->dirs; d; d = d->next) +#ifdef _WIN32 + if (FcStat (cache_file, file_stat) < 0) + return -1; +#endif + fd = open((char *) cache_file, O_RDONLY | O_BINARY); + if (fd < 0) + return fd; +#ifndef _WIN32 + if (fstat (fd, file_stat) < 0) { - if (strncmp (d->name, dir, strlen(dir)) == 0) - { - lseek (cache->fd, d->offset, SEEK_SET); - if (!FcDirCacheConsume (cache->fd, dir, set, config)) - return FcFalse; - if (strcmp (d->name, dir) == 0) - ret = FcTrue; - } + close (fd); + return -1; } - - return ret; +#endif + return fd; } -FcBool -FcGlobalCacheUpdate (FcGlobalCache *cache, - const char *name, - FcFontSet *set, - FcConfig *config) +/* + * 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, struct stat *fd_stat, + struct stat *dir_stat, void *closure), + void *closure, FcChar8 **cache_file_ret) { - FcGlobalCacheDir * d; + int fd = -1; + FcChar8 cache_base[CACHEBASE_LEN]; + FcStrList *list; + FcChar8 *cache_dir; + struct stat file_stat, dir_stat; + FcBool ret = FcFalse; - name = (char *)FcConfigNormalizeFontDir (config, (FcChar8 *)name); - for (d = cache->dirs; d; d = d->next) + if (FcStat (dir, &dir_stat) < 0) + return FcFalse; + + FcDirCacheBasename (dir, cache_base); + + list = FcStrListCreate (config->cacheDirs); + if (!list) + return FcFalse; + + while ((cache_dir = FcStrListNext (list))) { - if (strcmp(d->name, name) == 0) + FcChar8 *cache_hashed = FcStrPlus (cache_dir, cache_base); + if (!cache_hashed) break; + fd = FcDirCacheOpenFile (cache_hashed, &file_stat); + if (fd >= 0) { + ret = (*callback) (fd, &file_stat, &dir_stat, closure); + close (fd); + if (ret) + { + if (cache_file_ret) + *cache_file_ret = cache_hashed; + else + FcStrFree (cache_hashed); + break; + } + } + FcStrFree (cache_hashed); } + FcStrListDone (list); - if (!d) - { - d = malloc (sizeof (FcGlobalCacheDir)); - if (!d) - return FcFalse; - d->next = cache->dirs; - cache->dirs = d; - } + return ret; +} - cache->updated = FcTrue; +#define FC_CACHE_MIN_MMAP 1024 - d->name = (char *)FcStrCopy ((FcChar8 *)name); - d->ent = FcDirCacheProduce (set, &d->metadata); - d->offset = 0; - return FcTrue; -} +/* + * Skip list element, make sure the 'next' pointer is the last thing + * in the structure, it will be allocated large enough to hold all + * of the necessary pointers + */ -FcBool -FcGlobalCacheSave (FcGlobalCache *cache, - const FcChar8 *cache_file, - FcConfig *config) -{ - 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 - - atomic = FcAtomicCreate (cache_file); - if (!atomic) - return FcFalse; +typedef struct _FcCacheSkip FcCacheSkip; - if (!FcAtomicLock (atomic)) - goto bail1; - fd = open ((char *) FcAtomicNewFile(atomic), O_RDWR | O_CREAT, - S_IRUSR | S_IWUSR); - if (fd == -1) - goto bail2; - FcCacheWriteString (fd, FC_GLOBAL_MAGIC_COOKIE); +struct _FcCacheSkip { + FcCache *cache; + int ref; + intptr_t size; + dev_t cache_dev; + ino_t cache_ino; + time_t cache_mtime; + FcCacheSkip *next[1]; +}; + +/* + * The head of the skip list; pointers for every possible level + * in the skip list, plus the largest level in the list + */ - fd_orig = open ((char *) FcAtomicOrigFile(atomic), O_RDONLY); +#define FC_CACHE_MAX_LEVEL 16 - current_arch_machine_name = FcCacheMachineSignature (); - if (fd_orig == -1) - current_arch_start = 0; - else - current_arch_start = FcCacheSkipToArch (fd_orig, - current_arch_machine_name); +static FcCacheSkip *fcCacheChains[FC_CACHE_MAX_LEVEL]; +static int fcCacheMaxLevel; + +#if HAVE_RANDOM +# define FcRandom() random() +#else +# if HAVE_LRAND48 +# define FcRandom() lrand48() +# else +# if HAVE_RAND +# define FcRandom() rand() +# endif +# endif +#endif +/* + * Generate a random level number, distributed + * so that each level is 1/4 as likely as the one before + * + * Note that level numbers run 1 <= level <= MAX_LEVEL + */ +static int +random_level (void) +{ + /* tricky bit -- each bit is '1' 75% of the time */ + long int bits = FcRandom () | FcRandom (); + int level = 0; - if (current_arch_start < 0) + while (++level < FC_CACHE_MAX_LEVEL) { - off_t i = lseek(fd_orig, 0, SEEK_END); - if (i < strlen (FC_GLOBAL_MAGIC_COOKIE)+1) - i = strlen (FC_GLOBAL_MAGIC_COOKIE)+1; - current_arch_start = FcCacheNextOffset (i); + if (bits & 1) + break; + bits >>= 1; } + return level; +} - if (!FcCacheCopyOld(fd, fd_orig, current_arch_start)) - goto bail3; - - close (fd_orig); - fd_orig = -1; - - current_arch_start = lseek(fd, 0, SEEK_CUR); - if (ftruncate (fd, current_arch_start) == -1) - goto bail3; +/* + * Insert cache into the list + */ +static FcBool +FcCacheInsert (FcCache *cache, struct stat *cache_stat) +{ + FcCacheSkip **update[FC_CACHE_MAX_LEVEL]; + FcCacheSkip *s, **next; + int i, level; - header = malloc (10 + strlen (current_arch_machine_name)); - if (!header) - goto bail3; + /* + * Find links along each chain + */ + next = fcCacheChains; + for (i = fcCacheMaxLevel; --i >= 0; ) + { + for (; (s = next[i]); next = s->next) + if (s->cache > cache) + break; + update[i] = &next[i]; + } - truncate_to = current_arch_start + strlen(current_arch_machine_name) + 11; - for (dir = cache->dirs; dir; dir = dir->next) + /* + * Create new list element + */ + level = random_level (); + if (level > fcCacheMaxLevel) { - truncate_to += strlen(dir->name) + 1; - truncate_to += sizeof (FcCache); - truncate_to = FcCacheNextOffset (truncate_to); - truncate_to += dir->metadata.count; + level = fcCacheMaxLevel + 1; + update[fcCacheMaxLevel] = &fcCacheChains[fcCacheMaxLevel]; + fcCacheMaxLevel = level; } - truncate_to -= current_arch_start; - sprintf (header, "%8x ", (int)truncate_to); - strcat (header, current_arch_machine_name); - if (!FcCacheWriteString (fd, header)) - goto bail4; + s = malloc (sizeof (FcCacheSkip) + (level - 1) * sizeof (FcCacheSkip *)); + if (!s) + return FcFalse; - for (dir = cache->dirs; dir; dir = dir->next) + s->cache = cache; + s->size = cache->size; + s->ref = 1; + if (cache_stat) { - if (dir->name) - { - const char * d = (const char *)FcConfigNormalizeFontDir (config, (const FcChar8 *)dir->name); - - FcCacheWriteString (fd, d); - 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); - } + s->cache_dev = cache_stat->st_dev; + s->cache_ino = cache_stat->st_ino; + s->cache_mtime = cache_stat->st_mtime; + } + else + { + s->cache_dev = 0; + s->cache_ino = 0; + s->cache_mtime = 0; } - FcCacheWriteString (fd, ""); - - if (close (fd) == -1) - goto bail25; - - if (!FcAtomicReplaceOrig (atomic)) - goto bail25; - - FcAtomicUnlock (atomic); - FcAtomicDestroy (atomic); - cache->updated = FcFalse; + /* + * Insert into all fcCacheChains + */ + for (i = 0; i < level; i++) + { + s->next[i] = *update[i]; + *update[i] = s; + } return FcTrue; +} - bail4: - free (header); - bail3: - if (fd_orig != -1) - close (fd_orig); +static FcCacheSkip * +FcCacheFindByAddr (void *object) +{ + int i; + FcCacheSkip **next = fcCacheChains; + FcCacheSkip *s; - close (fd); - bail25: - FcAtomicDeleteNew (atomic); - bail2: - FcAtomicUnlock (atomic); - bail1: - FcAtomicDestroy (atomic); - return FcFalse; + /* + * Walk chain pointers one level at a time + */ + for (i = fcCacheMaxLevel; --i >= 0;) + while (next[i] && (char *) object >= ((char *) next[i]->cache + next[i]->size)) + next = next[i]->next; + /* + * Here we are + */ + s = next[0]; + if (s && (char *) object < ((char *) s->cache + s->size)) + return s; + return NULL; } -/* - * Find the next presumably-mmapable offset after the supplied file - * position. - */ -static int -FcCacheNextOffset(off_t w) +static void +FcCacheRemove (FcCache *cache) { - static long pagesize = -1; - if (pagesize == -1) - pagesize = sysconf(_SC_PAGESIZE); - if (w % pagesize == 0) - return w; - else - return ((w / pagesize)+1)*pagesize; + FcCacheSkip **update[FC_CACHE_MAX_LEVEL]; + FcCacheSkip *s, **next; + int i; + + /* + * Find links along each chain + */ + next = fcCacheChains; + for (i = fcCacheMaxLevel; --i >= 0; ) + { + for (; (s = next[i]); next = s->next) + if (s->cache >= cache) + break; + update[i] = &next[i]; + } + s = next[0]; + for (i = 0; i < fcCacheMaxLevel && *update[i] == s; i++) + *update[i] = s->next[i]; + while (fcCacheMaxLevel > 0 && fcCacheChains[fcCacheMaxLevel - 1] == NULL) + fcCacheMaxLevel--; + free (s); } -/* 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) +static FcCache * +FcCacheFindByStat (struct stat *cache_stat) { - char candidate_arch_machine_name_count[MACHINE_SIGNATURE_SIZE + 9]; - char * candidate_arch; - off_t current_arch_start = 0; + FcCacheSkip *s; - lseek (fd, 0, SEEK_SET); - FcCacheSkipString (fd); - current_arch_start = lseek (fd, 0, SEEK_CUR); - - /* skip arches that are not the current arch */ - while (1) - { - long bs; + for (s = fcCacheChains[0]; s; s = s->next[0]) + if (s->cache_dev == cache_stat->st_dev && + s->cache_ino == cache_stat->st_ino && + s->cache_mtime == cache_stat->st_mtime) + { + s->ref++; + return s->cache; + } + return NULL; +} - if (lseek (fd, current_arch_start, SEEK_SET) != current_arch_start) - return -1; +static void +FcDirCacheDispose (FcCache *cache) +{ + switch (cache->magic) { + case FC_CACHE_MAGIC_ALLOC: + free (cache); + break; + case FC_CACHE_MAGIC_MMAP: +#if defined(HAVE_MMAP) || defined(__CYGWIN__) + munmap (cache, cache->size); +#elif defined(_WIN32) + UnmapViewOfFile (cache); +#endif + break; + } + FcCacheRemove (cache); +} - 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); +void +FcCacheObjectReference (void *object) +{ + FcCacheSkip *skip = FcCacheFindByAddr (object); - // count = 0 should probably be distinguished from the !bs condition - if (!bs || bs < strlen (candidate_arch_machine_name_count)) - return -1; + if (skip) + skip->ref++; +} - candidate_arch++; /* skip leading space */ +void +FcCacheObjectDereference (void *object) +{ + FcCacheSkip *skip = FcCacheFindByAddr (object); - if (strcmp (candidate_arch, arch)==0) - return current_arch_start; - current_arch_start += bs; + if (skip) + { + skip->ref--; + if (skip->ref <= 0) + FcDirCacheDispose (skip->cache); } - - 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) +void +FcCacheFini (void) { - char * buf = malloc (8192); - char candidate_arch_machine_name[MACHINE_SIGNATURE_SIZE + 9]; - long bs; - int c, bytes_skipped; - off_t loc; + int i; - 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; + for (i = 0; i < FC_CACHE_MAX_LEVEL; i++) + assert (fcCacheChains[i] == NULL); + assert (fcCacheMaxLevel == 0); +} - if ((c = read (fd_orig, buf, b)) <= 0) - break; - if (write (fd, buf, c) < 0) - goto bail; +static FcBool +FcCacheTimeValid (FcCache *cache, struct stat *dir_stat) +{ + struct stat dir_static; - loc += c; + if (!dir_stat) + { + if (FcStat (FcCacheDir (cache), &dir_static) < 0) + return FcFalse; + dir_stat = &dir_static; } - 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; + if (FcDebug () & FC_DBG_CACHE) + printf ("FcCacheTimeValid dir \"%s\" cache time %d dir time %d\n", + FcCacheDir (cache), cache->mtime, (int) dir_stat->st_mtime); + return cache->mtime == (int) dir_stat->st_mtime; +} - bs = strtol(candidate_arch_machine_name, 0, 16); - if (bs == 0) - goto done; +/* + * Map a cache file into memory + */ +static FcCache * +FcDirCacheMapFd (int fd, struct stat *fd_stat, struct stat *dir_stat) +{ + FcCache *cache; + FcBool allocated = FcFalse; - bytes_skipped = 0; - do + if (fd_stat->st_size < sizeof (FcCache)) + return NULL; + cache = FcCacheFindByStat (fd_stat); + if (cache) { - 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; + if (FcCacheTimeValid (cache, dir_stat)) + return cache; + FcDirCacheUnload (cache); + cache = NULL; } - 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. */ -/* Also, this can be fooled if the original location has a stale - * cache, and the hashed location has an up-to-date cache. Oh well, - * sucks to be you in that case! */ -FcBool -FcDirCacheValid (const FcChar8 *dir) -{ - struct stat file_stat, dir_stat; - int fd; - - dir = FcConfigNormalizeFontDir (FcConfigGetCurrent(), dir); - if (!dir) - return FcFalse; - - if (stat ((char *) dir, &dir_stat) < 0) - return FcFalse; - - fd = FcDirCacheOpen (dir); - - if (fd < 0) - goto bail; - if (fstat (fd, &file_stat) < 0) - goto bail; - - close (fd); /* - * If the directory has been modified more recently than - * the cache file, the cache is not valid + * Lage cache files are mmap'ed, smaller cache files are read. This + * balances the system cost of mmap against per-process memory usage. */ - if (dir_stat.st_mtime > file_stat.st_mtime) - return FcFalse; - - return FcTrue; - - bail: - close (fd); - return FcFalse; -} - -/* Assumes that the cache file in 'dir' exists. - * Checks that the cache has the appropriate arch section. */ -FcBool -FcDirCacheHasCurrentArch (const FcChar8 *dir) -{ - int fd; - off_t current_arch_start; - char *current_arch_machine_name; - - dir = FcConfigNormalizeFontDir (FcConfigGetCurrent(), dir); - if (!dir) - return FcFalse; - - fd = FcDirCacheOpen (dir); - if (fd < 0) - goto bail; - - current_arch_machine_name = FcCacheMachineSignature(); - current_arch_start = FcCacheSkipToArch(fd, current_arch_machine_name); - close (fd); - - if (current_arch_start < 0) - return FcFalse; - - return FcTrue; - - bail: - return FcFalse; -} - -FcBool -FcDirCacheUnlink (const FcChar8 *dir, FcConfig *config) -{ - char *cache_file; - char *cache_hashed = 0; - int fd, collisions; - struct stat cache_stat; - char name_buf[FC_MAX_FILE_LEN]; - - dir = FcConfigNormalizeFontDir (config, dir); - cache_file = (char *)FcStrPlus (dir, (FcChar8 *) "/" FC_DIR_CACHE_FILE); - if (!cache_file) - return FcFalse; - - /* First remove normal cache file. */ - if (stat ((char *) cache_file, &cache_stat) == 0 && - unlink ((char *)cache_file) != 0) - goto bail; - - /* Next remove any applicable hashed files. */ - fd = -1; collisions = 0; - do + if (fd_stat->st_size >= FC_CACHE_MIN_MMAP) { - if (cache_hashed) - FcStrFree ((FcChar8 *)cache_hashed); - - cache_hashed = FcDirCacheHashName (cache_file, collisions++); - if (!cache_hashed) - goto bail; - - if (fd > 0) - close (fd); - fd = open(cache_hashed, O_RDONLY); - if (fd == -1) +#if defined(HAVE_MMAP) || defined(__CYGWIN__) + cache = mmap (0, fd_stat->st_size, PROT_READ, MAP_SHARED, fd, 0); + if (cache == MAP_FAILED) + cache = NULL; +#elif defined(_WIN32) { - FcStrFree ((FcChar8 *)cache_file); - return FcTrue; - } - - FcCacheReadString (fd, name_buf, sizeof (name_buf)); - if (!strlen(name_buf)) - { - FcStrFree ((FcChar8 *)cache_hashed); - goto bail; + HANDLE hFileMap; + + 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, + fd_stat->st_size); + CloseHandle (hFileMap); + } } - } while (strcmp (name_buf, cache_file) != 0); - - FcStrFree ((FcChar8 *)cache_file); - close (fd); - - if (stat ((char *) cache_hashed, &cache_stat) == 0 && - unlink ((char *)cache_hashed) != 0) - { - FcStrFree ((FcChar8 *)cache_hashed); - goto bail; +#endif } - - FcStrFree ((FcChar8 *)cache_hashed); - return FcTrue; - - bail: - FcStrFree ((FcChar8 *)cache_file); - return FcFalse; -} - -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 (!cache) { - 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); + cache = malloc (fd_stat->st_size); + if (!cache) + return NULL; - subdirs = FcStrSetCreate (); - if (!subdirs) + if (read (fd, cache, fd_stat->st_size) != fd_stat->st_size) { - fprintf (stderr, "Can't create directory set\n"); - ret++; - free (file); - continue; + free (cache); + return NULL; } - - 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, config)) - { - 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) + allocated = FcTrue; + } + if (cache->magic != FC_CACHE_MAGIC_MMAP || + cache->version < FC_CACHE_CONTENT_VERSION || + cache->size != fd_stat->st_size || + !FcCacheTimeValid (cache, dir_stat) || + !FcCacheInsert (cache, fd_stat)) + { + if (allocated) + free (cache); + else { - fprintf (stderr, "Can't create subdir list in \"%s\"\n", dir); - ret++; - free (file); - continue; +#if defined(HAVE_MMAP) || defined(__CYGWIN__) + munmap (cache, fd_stat->st_size); +#elif defined(_WIN32) + UnmapViewOfFile (cache); +#endif } - ret += FcCacheReadDirs (config, cache, sublist, set); - free (file); + return NULL; } - FcStrListDone (list); - return ret; + + /* Mark allocated caches so they're freed rather than unmapped */ + if (allocated) + cache->magic = FC_CACHE_MAGIC_ALLOC; + + return cache; } -FcFontSet * -FcCacheRead (FcConfig *config, FcGlobalCache * cache) +void +FcDirCacheReference (FcCache *cache, int nref) { - FcFontSet * s = FcFontSetCreate(); - if (!s) - return 0; - - if (FcCacheReadDirs (config, cache, FcConfigGetConfigDirs (config), s)) - goto bail; - - return s; + FcCacheSkip *skip = FcCacheFindByAddr (cache); - bail: - FcFontSetDestroy (s); - return 0; + if (skip) + skip->ref += nref; } -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) +void +FcDirCacheUnload (FcCache *cache) { - 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; + FcCacheObjectDereference (cache); } -/* 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 (const FcChar8 *dir) +static FcBool +FcDirCacheMapHelper (int fd, struct stat *fd_stat, struct stat *dir_stat, void *closure) { - FcBool found; - int fd = -1, collisions = 0; - char *cache_file, *cache_hashed; - char name_buf[FC_MAX_FILE_LEN]; - struct stat dir_stat; - - cache_file = (char *)FcStrPlus (dir, (FcChar8 *) "/" FC_DIR_CACHE_FILE); - if (!cache_file) - return -1; - - fd = open(cache_file, O_RDONLY); - if (fd != -1) - return fd; + FcCache *cache = FcDirCacheMapFd (fd, fd_stat, dir_stat); - if (stat ((char *)dir, &dir_stat) == -1) - return -1; + if (!cache) + return FcFalse; + *((FcCache **) closure) = cache; + return FcTrue; +} - found = FcFalse; - do - { - struct stat c; - FcChar8 * name_buf_dir; +FcCache * +FcDirCacheLoad (const FcChar8 *dir, FcConfig *config, FcChar8 **cache_file) +{ + FcCache *cache = NULL; - cache_hashed = FcDirCacheHashName (cache_file, collisions++); - if (!cache_hashed) - { - FcStrFree ((FcChar8 *)cache_file); - return -1; - } + if (!FcDirCacheProcess (config, dir, + FcDirCacheMapHelper, + &cache, cache_file)) + return NULL; + return cache; +} - if (fd > 0) - close (fd); - fd = open(cache_hashed, O_RDONLY); - FcStrFree ((FcChar8 *)cache_hashed); +FcCache * +FcDirCacheLoadFile (const FcChar8 *cache_file, struct stat *file_stat) +{ + int fd; + FcCache *cache; + struct stat my_file_stat; - if (fd == -1) - { - FcStrFree ((FcChar8 *)cache_file); - return -1; - } - FcCacheReadString (fd, name_buf, sizeof (name_buf)); - if (!strlen(name_buf)) - goto bail; + if (!file_stat) + file_stat = &my_file_stat; + fd = FcDirCacheOpenFile (cache_file, file_stat); + if (fd < 0) + return NULL; + cache = FcDirCacheMapFd (fd, file_stat, NULL); + close (fd); + return cache; +} - name_buf_dir = FcStrDirname ((FcChar8 *)name_buf); - if (stat ((char *)name_buf_dir, &c) == -1) - { - FcStrFree (name_buf_dir); - continue; - } - FcStrFree (name_buf_dir); - found = (c.st_ino == dir_stat.st_ino) && (c.st_dev == dir_stat.st_dev); - } while (!found); - FcStrFree ((FcChar8 *)cache_file); - return fd; +/* + * Validate a cache file by reading the header and checking + * the magic number and the size field + */ +static FcBool +FcDirCacheValidateHelper (int fd, struct stat *fd_stat, struct stat *dir_stat, void *closure) +{ + FcBool ret = FcTrue; + FcCache c; + + if (read (fd, &c, sizeof (FcCache)) != sizeof (FcCache)) + ret = FcFalse; + else if (c.magic != FC_CACHE_MAGIC_MMAP) + ret = FcFalse; + else if (c.version < FC_CACHE_CONTENT_VERSION) + ret = FcFalse; + else if (fd_stat->st_size != c.size) + ret = FcFalse; + else if (c.mtime != (int) dir_stat->st_mtime) + ret = FcFalse; + return ret; +} - bail: - FcStrFree ((FcChar8 *)cache_file); - close (fd); - return -1; +static FcBool +FcDirCacheValidConfig (const FcChar8 *dir, FcConfig *config) +{ + return FcDirCacheProcess (config, dir, + FcDirCacheValidateHelper, + NULL, NULL); } -/* read serialized state from the cache file */ FcBool -FcDirCacheRead (FcFontSet * set, FcStrSet * dirs, const FcChar8 *dir, FcConfig *config) +FcDirCacheValid (const FcChar8 *dir) { - 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]; + FcConfig *config; - fd = FcDirCacheOpen (dir); - if (fd < 0) - goto bail; + config = FcConfigGetCurrent (); + if (!config) + return FcFalse; - current_arch_machine_name = FcCacheMachineSignature(); - current_arch_start = FcCacheSkipToArch(fd, - current_arch_machine_name); - if (current_arch_start < 0) - goto bail1; + return FcDirCacheValidConfig (dir, config); +} - lseek (fd, current_arch_start, SEEK_SET); - if (FcCacheReadString (fd, candidate_arch_machine_name, - sizeof (candidate_arch_machine_name)) == 0) +/* + * Build a cache structure from the given contents + */ +FcCache * +FcDirCacheBuild (FcFontSet *set, const FcChar8 *dir, struct stat *dir_stat, FcStrSet *dirs) +{ + 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; + + if (!serialize) + return NULL; + /* + * Space for cache structure + */ + cache_offset = FcSerializeReserve (serialize, sizeof (FcCache)); + /* + * Directory name + */ + if (!FcStrSerializeAlloc (serialize, dir)) goto bail1; + /* + * 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; - while (strlen(FcCacheReadString (fd, subdirName, sizeof (subdirName))) > 0) - FcStrSetAdd (dirs, (FcChar8 *)subdirName); + /* + * Patterns + */ + if (!FcFontSetSerializeAlloc (serialize, set)) + goto bail1; - if (!FcDirCacheConsume (fd, (const char *)dir, set, config)) + /* Serialize layout complete. Now allocate space and fill it */ + cache = malloc (serialize->size); + if (!cache) goto bail1; - - close(fd); - return FcTrue; + /* shut up valgrind */ + memset (cache, 0, serialize->size); - bail1: - close (fd); - bail: - return FcFalse; -} + serialize->linear = cache; -static FcBool -FcDirCacheConsume (int fd, const char * dir, FcFontSet *set, FcConfig *config) -{ - FcCache metadata; - void * current_dir_block; - off_t pos; + cache->magic = FC_CACHE_MAGIC_ALLOC; + cache->version = FC_CACHE_CONTENT_VERSION; + cache->size = serialize->size; + cache->mtime = (int) dir_stat->st_mtime; - read(fd, &metadata, sizeof(FcCache)); - if (metadata.magic != FC_CACHE_MAGIC) - return FcFalse; + /* + * Serialize directory name + */ + dir_serialize = FcStrSerialize (serialize, dir); + if (!dir_serialize) + goto bail2; + cache->dir = FcPtrToOffset (cache, dir_serialize); - if (!metadata.count) + /* + * 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++) { - pos = FcCacheNextOffset (lseek(fd, 0, SEEK_CUR)); - lseek (fd, pos, SEEK_SET); - if (config) - FcConfigAddFontDir (config, (FcChar8 *)dir); - return FcTrue; + FcChar8 *d_serialize = FcStrSerialize (serialize, dirs->strs[i]); + if (!d_serialize) + goto bail2; + dirs_serialize[i] = FcPtrToOffset (dirs_serialize, d_serialize); } - pos = FcCacheNextOffset (lseek(fd, 0, SEEK_CUR)); - current_dir_block = mmap (0, metadata.count, - PROT_READ, MAP_SHARED, fd, pos); - lseek (fd, pos+metadata.count, SEEK_SET); - if (current_dir_block == MAP_FAILED) - return FcFalse; + /* + * Serialize font set + */ + set_serialize = FcFontSetSerialize (serialize, set); + if (!set_serialize) + goto bail2; + cache->set = FcPtrToOffset (cache, set_serialize); - FcCacheAddBankDir (metadata.bank, dir); - if (config) - FcConfigAddFontDir (config, (FcChar8 *)dir); + FcSerializeDestroy (serialize); - if (!FcFontSetUnserialize (&metadata, set, current_dir_block)) - return FcFalse; + FcCacheInsert (cache, NULL); - return FcTrue; + return cache; + +bail2: + free (cache); +bail1: + FcSerializeDestroy (serialize); + return NULL; } -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); +#ifdef _WIN32 +#define mkdir(path,mode) _mkdir(path) +#endif - if ((void *)((char *)current_dir_block+metadata->count) < final_dir_block) - goto bail; - - if (!FcFontSetSerialize (bank, set)) - goto bail; +static FcBool +FcMakeDirectory (const FcChar8 *dir) +{ + FcChar8 *parent; + FcBool ret; - return current_dir_block; + if (strlen ((char *) dir) == 0) + return FcFalse; - bail: - free (current_dir_block); - return 0; + parent = FcStrDirname (dir); + if (!parent) + return FcFalse; + if (access ((char *) parent, F_OK) == 0) + ret = mkdir ((char *) dir, 0755) == 0 && chmod ((char *) dir, 0755) == 0; + else if (access ((char *) parent, F_OK) == -1) + ret = FcMakeDirectory (parent) && (mkdir ((char *) dir, 0755) == 0) && chmod ((char *) dir, 0755) == 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 (FcCache *cache, FcConfig *config) { - char *cache_file; - char *cache_hashed; - int fd, fd_orig, i, dirs_count; + FcChar8 *dir = FcCacheDir (cache); + FcChar8 cache_base[CACHEBASE_LEN]; + FcChar8 *cache_hashed; + int fd; FcAtomic *atomic; - FcCache metadata; - off_t current_arch_start = 0, truncate_to; - char name_buf[FC_MAX_FILE_LEN]; - int collisions; + FcStrList *list; + FcChar8 *cache_dir = NULL; + FcChar8 *test_dir; + FcCacheSkip *skip; + struct stat cache_stat; + int magic; + int written; - char *current_arch_machine_name, * header; - void *current_dir_block = 0; + /* + * Write it to the first directory in the list which is writable + */ - dir = FcConfigNormalizeFontDir (FcConfigGetCurrent(), dir); - if (!dir) + list = FcStrListCreate (config->cacheDirs); + if (!list) return FcFalse; - - 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)) + 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; + } + } + /* + * Otherwise, try making it writable + */ + else if (chmod ((char *) test_dir, 0755) == 0) + { + cache_dir = test_dir; + break; + } + } + } + FcStrListDone (list); + if (!cache_dir) + return FcFalse; - if (strcmp (name_buf, cache_file) != 0) - continue; - } while (0); - - current_dir_block = FcDirCacheProduce (set, &metadata); - - if (metadata.count && !current_dir_block) - goto bail1; + FcDirCacheBasename (dir, cache_base); + cache_hashed = FcStrPlus (cache_dir, cache_base); + if (!cache_hashed) + return FcFalse; 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; if (!FcAtomicLock (atomic)) - { - /* Now try rewriting the original version of the file. */ - FcAtomicDestroy (atomic); - - atomic = FcAtomicCreate ((FcChar8 *)cache_file); - fd_orig = open (cache_file, O_RDONLY); - if (fd_orig == -1) - fd_orig = open((char *)FcAtomicOrigFile (atomic), O_RDONLY); - - fd = open((char *)FcAtomicNewFile (atomic), O_RDWR | O_CREAT, 0666); - if (fd == -1) - goto bail2; - } - - /* In all cases, try opening the real location of the cache file first. */ - /* (even if that's not atomic.) */ - fd_orig = open (cache_file, O_RDONLY); - if (fd_orig == -1) - fd_orig = open((char *)FcAtomicOrigFile (atomic), O_RDONLY); - - fd = open((char *)FcAtomicNewFile (atomic), O_RDWR | O_CREAT, 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); - - if (current_arch_start < 0) - { - off_t i = lseek(fd_orig, 0, SEEK_END); - if (i < strlen (FC_GLOBAL_MAGIC_COOKIE)+1) - i = strlen (FC_GLOBAL_MAGIC_COOKIE)+1; - current_arch_start = FcCacheNextOffset (i); - } - - if (fd_orig != -1 && !FcCacheCopyOld(fd, fd_orig, current_arch_start)) + fd = open((char *)FcAtomicNewFile (atomic), O_RDWR | O_CREAT | O_BINARY, 0666); + if (fd == -1) goto bail4; - if (fd_orig != -1) - close (fd_orig); + /* Temporarily switch magic to MMAP while writing to file */ + magic = cache->magic; + if (magic != FC_CACHE_MAGIC_MMAP) + cache->magic = FC_CACHE_MAGIC_MMAP; - current_arch_start = lseek(fd, 0, SEEK_CUR); - if (ftruncate (fd, current_arch_start) == -1) - goto bail4; + /* + * Write cache contents to file + */ + written = write (fd, cache, cache->size); - /* 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 ++; + /* Switch magic back */ + if (magic != FC_CACHE_MAGIC_MMAP) + cache->magic = magic; - /* 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)) + if (written != cache->size) + { + perror ("write cache"); goto bail5; + } - for (i = 0; i < dirs->size; i++) - FcCacheWriteString (fd, (char *)dirs->strs[i]); - FcCacheWriteString (fd, ""); + close(fd); + if (!FcAtomicReplaceOrig(atomic)) + goto bail4; - write (fd, &metadata, sizeof(FcCache)); - if (metadata.count) + /* If the file is small, update the cache chain entry such that the + * new cache file is not read again. If it's large, we don't do that + * such that we reload it, using mmap, which is shared across processes. + */ + if (cache->size < FC_CACHE_MIN_MMAP && + (skip = FcCacheFindByAddr (cache)) && + FcStat (cache_hashed, &cache_stat)) { - lseek (fd, FcCacheNextOffset (lseek(fd, 0, SEEK_END)), SEEK_SET); - write (fd, current_dir_block, metadata.count); - free (current_dir_block); + skip->cache_dev = cache_stat.st_dev; + skip->cache_ino = cache_stat.st_ino; + skip->cache_mtime = cache_stat.st_mtime; } - /* this actually serves to pad out the cache file, if needed */ - if (ftruncate (fd, current_arch_start + truncate_to) == -1) - goto bail5; - - free (header); - close(fd); - if (!FcAtomicReplaceOrig(atomic)) - goto bail5; - FcStrFree ((FcChar8 *)cache_hashed); - FcStrFree ((FcChar8 *)cache_file); + FcStrFree (cache_hashed); FcAtomicUnlock (atomic); FcAtomicDestroy (atomic); return FcTrue; bail5: - free (header); - bail4: close (fd); - bail3: + bail4: FcAtomicUnlock (atomic); - bail2: + bail3: FcAtomicDestroy (atomic); bail1: - FcStrFree ((FcChar8 *)cache_hashed); - bail0: - unlink ((char *)cache_file); - FcStrFree ((FcChar8 *)cache_file); - if (current_dir_block) - free (current_dir_block); - bail: + FcStrFree (cache_hashed); 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; +/* + * Hokey little macro trick to permit the definitions of C functions + * with the same name as CPP macros + */ +#define args1(x) (x) +#define args2(x,y) (x,y) -static FcBool -FcCacheHaveBank (int bank) +const FcChar8 * +FcCacheDir args1(const FcCache *c) { - int i; - - if (bank < FC_BANK_FIRST) - return FcTrue; - - for (i = 0; i < banks_ptr; i++) - if (_fcBankId[i] == bank) - return FcTrue; - - return FcFalse; + return FcCacheDir (c); } -int -FcCacheBankToIndexMTF (int bank) +FcFontSet * +FcCacheCopySet args1(const FcCache *c) { - int i, j; + FcFontSet *old = FcCacheSet (c); + FcFontSet *new = FcFontSetCreate (); + int i; - for (i = 0; i < banks_ptr; i++) - if (_fcBankId[_fcBankIdx[i]] == bank) + if (!new) + return NULL; + for (i = 0; i < old->nfont; i++) + { + FcPattern *font = FcFontSetFont (old, i); + + FcPatternReference (font); + if (!FcFontSetAdd (new, font)) { - int t = _fcBankIdx[i]; - - for (j = i; j > 0; j--) - _fcBankIdx[j] = _fcBankIdx[j-1]; - _fcBankIdx[0] = t; - return t; + FcFontSetDestroy (new); + return NULL; } - - 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; + return new; } -static void -FcCacheAddBankDir (int bank, const char * dir) +const FcChar8 * +FcCacheSubdir args2(const FcCache *c, int i) { - int bi = FcCacheBankToIndexMTF (bank); - - if (bi < 0) - return; + return FcCacheSubdir (c, i); +} - bankDirs[bi] = (const char *)FcStrCopy ((FcChar8 *)dir); +int +FcCacheNumSubdir args1(const FcCache *c) +{ + return c->dirs_count; } -const char * -FcCacheFindBankDir (int bank) +int +FcCacheNumFont args1(const FcCache *c) { - int bi = FcCacheBankToIndex (bank); - return bankDirs[bi]; + return FcCacheSet(c)->nfont; } /* @@ -1423,7 +1081,7 @@ static void MD5Init(struct MD5Context *ctx) * Update context to reflect the concatenation of another buffer full * of bytes. */ -static void MD5Update(struct MD5Context *ctx, unsigned char *buf, unsigned len) +static void MD5Update(struct MD5Context *ctx, const unsigned char *buf, unsigned len) { FcChar32 t; @@ -1468,7 +1126,7 @@ static void MD5Update(struct MD5Context *ctx, unsigned char *buf, unsigned len) } /* - * Final wrapup - pad to 64-byte boundary with the bit pattern + * 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) @@ -1509,7 +1167,7 @@ static void MD5Final(unsigned char digest[16], struct MD5Context *ctx) 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 */ + memset(ctx, 0, sizeof(*ctx)); /* In case it's sensitive */ } @@ -1612,3 +1270,6 @@ static void MD5Transform(FcChar32 buf[4], FcChar32 in[16]) buf[2] += c; buf[3] += d; } +#define __fccache__ +#include "fcaliastail.h" +#undef __fccache__