X-Git-Url: https://git.wh0rd.org/?a=blobdiff_plain;f=src%2Ffccache.c;h=2d4a4377ba42145cc5ca6b25239db1dc96f1e197;hb=HEAD;hp=ab6bec0ffbcfac8ea3a852880ffbdd7b0525b60a;hpb=4f27c1c0a383e891890ab27c74226957ed7067aa;p=fontconfig.git diff --git a/src/fccache.c b/src/fccache.c index ab6bec0..2d4a437 100644 --- a/src/fccache.c +++ b/src/fccache.c @@ -1,21 +1,20 @@ /* - * $RCSId: xc/lib/fontconfig/src/fccache.c,v 1.12 2002/08/22 07:36:44 keithp Exp $ - * - * Copyright © 2000 Keith Packard + * Copyright © 2000 Keith Packard + * Copyright © 2005 Patrick Lam * * Permission to use, copy, modify, distribute, and sell this software and its * 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 @@ -23,1138 +22,1254 @@ */ #include "fcint.h" +#include "fcarch.h" +#include +#include +#include +#include +#include +#include +#if defined(HAVE_MMAP) || defined(__CYGWIN__) +# include +# include +#elif defined(_WIN32) +# define _WIN32_WINNT 0x0500 +# include +#endif -/* - * POSIX has broken stdio so that getc must do thread-safe locking, - * this is a serious performance problem for applications doing large - * amounts of IO with getc (as is done here). If available, use - * the getc_unlocked varient instead. - */ - -#if defined(getc_unlocked) || defined(_IO_getc_unlocked) -#define GETC(f) getc_unlocked(f) -#define PUTC(c,f) putc_unlocked(c,f) +#ifndef O_BINARY +#define O_BINARY 0 +#endif + + +struct MD5Context { + FcChar32 buf[4]; + FcChar32 bits[2]; + unsigned char in[64]; +}; + +static void MD5Init(struct MD5Context *ctx); +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 CACHEBASE_LEN (1 + 32 + 1 + sizeof (FC_ARCHITECTURE) + sizeof (FC_CACHE_SUFFIX)) + +#ifdef _WIN32 + +#include + +#ifdef __GNUC__ +typedef long long INT64; +#define EPOCH_OFFSET 11644473600ll #else -#define GETC(f) getc(f) -#define PUTC(c,f) putc(c,f) +#define EPOCH_OFFSET 11644473600i64 +typedef __int64 INT64; #endif -#define FC_DBG_CACHE_REF 1024 +/* 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 FcChar8 * -FcCacheReadString (FILE *f, FcChar8 *dest, int len) +int +FcStat (const char *file, struct stat *statb) { - int c; - FcBool escape; - FcChar8 *d; - int size; - int i; + WIN32_FILE_ATTRIBUTE_DATA wfad; + char full_path_name[MAX_PATH]; + char *basename; + DWORD rc; + + if (!GetFileAttributesEx (file, GetFileExInfoStandard, &wfad)) + return -1; + + statb->st_dev = 0; + + /* 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; + + rc = GetLongPathName (full_path_name, full_path_name, sizeof (full_path_name)); + statb->st_ino = FcStringHash (full_path_name); + + statb->st_mode = _S_IREAD | _S_IWRITE; + statb->st_mode |= (statb->st_mode >> 3) | (statb->st_mode >> 6); + + if (wfad.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY) + statb->st_mode |= _S_IFDIR; + else + statb->st_mode |= _S_IFREG; + + statb->st_nlink = 1; + statb->st_uid = statb->st_gid = 0; + statb->st_rdev = 0; + + if (wfad.nFileSizeHigh > 0) + return -1; + statb->st_size = wfad.nFileSizeLow; + + statb->st_atime = (*(INT64 *)&wfad.ftLastAccessTime)/10000000 - EPOCH_OFFSET; + statb->st_mtime = (*(INT64 *)&wfad.ftLastWriteTime)/10000000 - EPOCH_OFFSET; + statb->st_ctime = statb->st_mtime; - while ((c = GETC (f)) != EOF) - if (c == '"') - break; - if (c == EOF) - return FcFalse; - if (len == 0) - return FcFalse; - - size = len; - i = 0; - d = dest; - escape = FcFalse; - while ((c = GETC (f)) != EOF) - { - if (!escape) - { - switch (c) { - case '"': - c = '\0'; - break; - case '\\': - escape = FcTrue; - continue; - } - } - if (i == size) - { - FcChar8 *new = malloc (size * 2); /* freed in caller */ - if (!new) - break; - memcpy (new, d, size); - size *= 2; - if (d != dest) - free (d); - d = new; - } - d[i++] = c; - if (c == '\0') - return d; - escape = FcFalse; - } - if (d != dest) - free (d); return 0; } -static FcBool -FcCacheReadUlong (FILE *f, unsigned long *dest) -{ - unsigned long t; - int c; +#else - while ((c = GETC (f)) != EOF) - { - if (!isspace (c)) - break; - } - if (c == EOF) - return FcFalse; - t = 0; - for (;;) - { - if (c == EOF || isspace (c)) - break; - if (!isdigit (c)) - return FcFalse; - t = t * 10 + (c - '0'); - c = GETC (f); - } - *dest = t; - return FcTrue; +int +FcStat (const char *file, struct stat *statb) +{ + return stat ((char *) file, statb); } -static FcBool -FcCacheReadInt (FILE *f, int *dest) -{ - unsigned long t; - FcBool ret; +#endif - ret = FcCacheReadUlong (f, &t); - if (ret) - *dest = (int) t; - return ret; -} +static const char bin2hex[] = { '0', '1', '2', '3', + '4', '5', '6', '7', + '8', '9', 'a', 'b', + 'c', 'd', 'e', 'f' }; -static FcBool -FcCacheReadTime (FILE *f, time_t *dest) +static FcChar8 * +FcDirCacheBasename (const FcChar8 * dir, FcChar8 cache_base[CACHEBASE_LEN]) { - unsigned long t; - FcBool ret; + unsigned char hash[16]; + FcChar8 *hex_hash; + int cnt; + struct MD5Context ctx; - ret = FcCacheReadUlong (f, &t); - if (ret) - *dest = (time_t) t; - return ret; -} + MD5Init (&ctx); + MD5Update (&ctx, (const unsigned char *)dir, strlen ((const char *) dir)); -static FcBool -FcCacheWriteChars (FILE *f, const FcChar8 *chars) -{ - FcChar8 c; - while ((c = *chars++)) + MD5Final (hash, &ctx); + + cache_base[0] = '/'; + hex_hash = cache_base + 1; + for (cnt = 0; cnt < 16; ++cnt) { - switch (c) { - case '"': - case '\\': - if (PUTC ('\\', f) == EOF) - return FcFalse; - /* fall through */ - default: - if (PUTC (c, f) == EOF) - return FcFalse; - } + hex_hash[2*cnt ] = bin2hex[hash[cnt] >> 4]; + hex_hash[2*cnt+1] = bin2hex[hash[cnt] & 0xf]; } - return FcTrue; + hex_hash[2*cnt] = 0; + strcat ((char *) cache_base, "-" FC_ARCHITECTURE FC_CACHE_SUFFIX); + + return cache_base; } -static FcBool -FcCacheWriteString (FILE *f, const FcChar8 *string) +FcBool +FcDirCacheUnlink (const FcChar8 *dir, FcConfig *config) { + FcChar8 *cache_hashed = NULL; + FcChar8 cache_base[CACHEBASE_LEN]; + FcStrList *list; + FcChar8 *cache_dir; - if (PUTC ('"', f) == EOF) - return FcFalse; - if (!FcCacheWriteChars (f, string)) - return FcFalse; - if (PUTC ('"', f) == EOF) - return FcFalse; - return FcTrue; -} + FcDirCacheBasename (dir, cache_base); -static FcBool -FcCacheWritePath (FILE *f, const FcChar8 *dir, const FcChar8 *file) -{ - if (PUTC ('"', f) == EOF) - return FcFalse; - if (dir) - if (!FcCacheWriteChars (f, dir)) - return FcFalse; -#ifdef _WIN32 - if (dir && - dir[strlen((const char *) dir) - 1] != '/' && - dir[strlen((const char *) dir) - 1] != '\\') + list = FcStrListCreate (config->cacheDirs); + if (!list) + return FcFalse; + + while ((cache_dir = FcStrListNext (list))) { - if (!FcCacheWriteChars (f, "\\")) - return FcFalse; + cache_hashed = FcStrPlus (cache_dir, cache_base); + if (!cache_hashed) + break; + (void) unlink ((char *) cache_hashed); + FcStrFree (cache_hashed); } -#else - if (dir && dir[strlen((const char *) dir) - 1] != '/') - if (PUTC ('/', f) == EOF) - return FcFalse; -#endif - if (!FcCacheWriteChars (f, file)) - return FcFalse; - if (PUTC ('"', f) == EOF) + FcStrListDone (list); + /* return FcFalse if something went wrong */ + if (cache_dir) return FcFalse; return FcTrue; } -static FcBool -FcCacheWriteUlong (FILE *f, unsigned long t) +static int +FcDirCacheOpenFile (const FcChar8 *cache_file, struct stat *file_stat) { - int pow; - unsigned long temp, digit; + int fd; - temp = t; - pow = 1; - while (temp >= 10) - { - temp /= 10; - pow *= 10; - } - temp = t; - while (pow) +#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) { - digit = temp / pow; - if (PUTC ((char) digit + '0', f) == EOF) - return FcFalse; - temp = temp - pow * digit; - pow = pow / 10; + close (fd); + return -1; } - return FcTrue; +#endif + return fd; } +/* + * Look for a cache file for the specified dir. Attempt + * to use each one we find, stopping when the callback + * indicates success + */ static FcBool -FcCacheWriteInt (FILE *f, int i) +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) { - return FcCacheWriteUlong (f, (unsigned long) i); -} + int fd = -1; + FcChar8 cache_base[CACHEBASE_LEN]; + FcStrList *list; + FcChar8 *cache_dir; + struct stat file_stat, dir_stat; + FcBool ret = FcFalse; -static FcBool -FcCacheWriteTime (FILE *f, time_t t) -{ - return FcCacheWriteUlong (f, (unsigned long) t); -} + if (FcStat (dir, &dir_stat) < 0) + return FcFalse; -static FcBool -FcCacheFontSetAdd (FcFontSet *set, - FcStrSet *dirs, - const FcChar8 *dir, - int dir_len, - const FcChar8 *file, - const FcChar8 *name, - FcConfig *config) -{ - FcChar8 path_buf[8192], *path; - int len; - FcBool ret = FcFalse; - FcPattern *font; - FcPattern *frozen; + FcDirCacheBasename (dir, cache_base); - path = path_buf; - len = (dir_len + 1 + strlen ((const char *) file) + 1); - if (len > sizeof (path_buf)) - { - path = malloc (len); /* freed down below */ - if (!path) - return FcFalse; - } - strncpy ((char *) path, (const char *) dir, dir_len); -#ifdef _WIN32 - if (dir[dir_len - 1] != '/' && dir[dir_len - 1] != '\\' ) - path[dir_len++] = '\\'; -#else - if (dir[dir_len - 1] != '/') - path[dir_len++] = '/'; -#endif - strcpy ((char *) path + dir_len, (const char *) file); - if (config && !FcConfigAcceptFilename (config, path)) - ret = FcTrue; - else if (!FcStrCmp (name, FC_FONT_FILE_DIR)) - { - if (FcDebug () & FC_DBG_CACHEV) - printf (" dir cache dir \"%s\"\n", path); - ret = FcStrSetAdd (dirs, path); - } - else if (!FcStrCmp (name, FC_FONT_FILE_INVALID)) - { - ret = FcTrue; - } - else + list = FcStrListCreate (config->cacheDirs); + if (!list) + return FcFalse; + + while ((cache_dir = FcStrListNext (list))) { - font = FcNameParse (name); - if (font) - { - if (FcDebug () & FC_DBG_CACHEV) - printf (" dir cache file \"%s\"\n", file); - ret = FcPatternAddString (font, FC_FILE, path); - if (ret && (!config || FcConfigAcceptFont (config, font))) + 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) { - frozen = FcPatternFreeze (font); - ret = (frozen != 0); - if (ret) - ret = FcFontSetAdd (set, frozen); + if (cache_file_ret) + *cache_file_ret = cache_hashed; + else + FcStrFree (cache_hashed); + break; } - FcPatternDestroy (font); } + FcStrFree (cache_hashed); } - if (path != path_buf) free (path); + FcStrListDone (list); + return ret; - } -static unsigned int -FcCacheHash (const FcChar8 *string, int len) -{ - unsigned int h = 0; - FcChar8 c; +#define FC_CACHE_MIN_MMAP 1024 - while (len-- && (c = *string++)) - h = (h << 1) ^ c; - return h; -} +/* + * 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 + */ + +typedef struct _FcCacheSkip FcCacheSkip; + +struct _FcCacheSkip { + FcCache *cache; + int ref; + intptr_t size; + dev_t cache_dev; + ino_t cache_ino; + time_t cache_mtime; + FcCacheSkip *next[1]; +}; /* - * Verify the saved timestamp for a file + * The head of the skip list; pointers for every possible level + * in the skip list, plus the largest level in the list */ -FcBool -FcGlobalCacheCheckTime (const FcChar8 *file, FcGlobalCacheInfo *info) -{ - struct stat statb; - if (stat ((char *) file, &statb) < 0) - { - if (FcDebug () & FC_DBG_CACHE) - printf (" file %s missing\n", file); - return FcFalse; - } - if (statb.st_mtime != info->time) - { - if (FcDebug () & FC_DBG_CACHE) - printf (" timestamp mismatch (was %d is %d)\n", - (int) info->time, (int) statb.st_mtime); - return FcFalse; - } - return FcTrue; -} +#define FC_CACHE_MAX_LEVEL 16 -void -FcGlobalCacheReferenced (FcGlobalCache *cache, - FcGlobalCacheInfo *info) +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) { - if (!info->referenced) + /* tricky bit -- each bit is '1' 75% of the time */ + long int bits = FcRandom () | FcRandom (); + int level = 0; + + while (++level < FC_CACHE_MAX_LEVEL) { - info->referenced = FcTrue; - cache->referenced++; - if (FcDebug () & FC_DBG_CACHE_REF) - printf ("Reference %d %s\n", cache->referenced, info->file); + if (bits & 1) + break; + bits >>= 1; } + return level; } /* - * Break a path into dir/base elements and compute the base hash - * and the dir length. This is shared between the functions - * which walk the file caches + * Insert cache into the list */ - -typedef struct _FcFilePathInfo { - const FcChar8 *dir; - int dir_len; - const FcChar8 *base; - unsigned int base_hash; -} FcFilePathInfo; - -static FcFilePathInfo -FcFilePathInfoGet (const FcChar8 *path) +static FcBool +FcCacheInsert (FcCache *cache, struct stat *cache_stat) { - FcFilePathInfo i; - FcChar8 *slash; + FcCacheSkip **update[FC_CACHE_MAX_LEVEL]; + FcCacheSkip *s, **next; + int i, level; - slash = FcStrLastSlash (path); - if (slash) + /* + * Find links along each chain + */ + next = fcCacheChains; + for (i = fcCacheMaxLevel; --i >= 0; ) { - i.dir = path; - i.dir_len = slash - path; - if (!i.dir_len) - i.dir_len = 1; - i.base = slash + 1; + for (; (s = next[i]); next = s->next) + if (s->cache > cache) + break; + update[i] = &next[i]; } - else + + /* + * Create new list element + */ + level = random_level (); + if (level > fcCacheMaxLevel) { - i.dir = (const FcChar8 *) "."; - i.dir_len = 1; - i.base = path; + level = fcCacheMaxLevel + 1; + update[fcCacheMaxLevel] = &fcCacheChains[fcCacheMaxLevel]; + fcCacheMaxLevel = level; } - i.base_hash = FcCacheHash (i.base, -1); - return i; -} -FcGlobalCacheDir * -FcGlobalCacheDirGet (FcGlobalCache *cache, - const FcChar8 *dir, - int len, - FcBool create_missing) -{ - unsigned int hash = FcCacheHash (dir, len); - FcGlobalCacheDir *d, **prev; + s = malloc (sizeof (FcCacheSkip) + (level - 1) * sizeof (FcCacheSkip *)); + if (!s) + return FcFalse; - for (prev = &cache->ents[hash % FC_GLOBAL_CACHE_DIR_HASH_SIZE]; - (d = *prev); - prev = &(*prev)->next) + s->cache = cache; + s->size = cache->size; + s->ref = 1; + if (cache_stat) { - if (d->info.hash == hash && d->len == len && - !strncmp ((const char *) d->info.file, - (const char *) dir, len)) - break; + s->cache_dev = cache_stat->st_dev; + s->cache_ino = cache_stat->st_ino; + s->cache_mtime = cache_stat->st_mtime; } - if (!(d = *prev)) + else + { + s->cache_dev = 0; + s->cache_ino = 0; + s->cache_mtime = 0; + } + + /* + * Insert into all fcCacheChains + */ + for (i = 0; i < level; i++) { - int i; - if (!create_missing) - return 0; - d = malloc (sizeof (FcGlobalCacheDir) + len + 1); - if (!d) - return 0; - FcMemAlloc (FC_MEM_CACHE, sizeof (FcGlobalCacheDir) + len + 1); - d->next = *prev; - *prev = d; - d->info.hash = hash; - d->info.file = (FcChar8 *) (d + 1); - strncpy ((char *) d->info.file, (const char *) dir, len); - d->info.file[len] = '\0'; - d->info.time = 0; - d->info.referenced = FcFalse; - d->len = len; - for (i = 0; i < FC_GLOBAL_CACHE_FILE_HASH_SIZE; i++) - d->ents[i] = 0; - d->subdirs = 0; + s->next[i] = *update[i]; + *update[i] = s; } - return d; + return FcTrue; } -static FcGlobalCacheInfo * -FcGlobalCacheDirAdd (FcGlobalCache *cache, - const FcChar8 *dir, - time_t time, - FcBool replace, - FcBool create_missing) +static FcCacheSkip * +FcCacheFindByAddr (void *object) { - FcGlobalCacheDir *d; - FcFilePathInfo i; - FcGlobalCacheSubdir *subdir; - FcGlobalCacheDir *parent; + int i; + FcCacheSkip **next = fcCacheChains; + FcCacheSkip *s; - i = FcFilePathInfoGet (dir); - parent = FcGlobalCacheDirGet (cache, i.dir, i.dir_len, create_missing); /* - * Tricky here -- directories containing fonts.cache-1 files - * need entries only when the parent doesn't have a cache file. - * That is, when the parent already exists in the cache, is - * referenced and has a "real" timestamp. The time of 0 is - * special and marks directories which got stuck in the - * global cache for this very reason. Yes, it could - * use a separate boolean field, and probably should. + * Walk chain pointers one level at a time */ - if (!parent || (!create_missing && - (!parent->info.referenced || - (parent->info.time == 0)))) - return 0; + for (i = fcCacheMaxLevel; --i >= 0;) + while (next[i] && (char *) object >= ((char *) next[i]->cache + next[i]->size)) + next = next[i]->next; /* - * Add this directory to the cache + * Here we are */ - d = FcGlobalCacheDirGet (cache, dir, strlen ((const char *) dir), FcTrue); - if (!d) - return 0; - d->info.time = time; + s = next[0]; + if (s && (char *) object < ((char *) s->cache + s->size)) + return s; + return NULL; +} + +static void +FcCacheRemove (FcCache *cache) +{ + FcCacheSkip **update[FC_CACHE_MAX_LEVEL]; + FcCacheSkip *s, **next; + int i; + /* - * Add this directory to the subdirectory list of the parent + * Find links along each chain */ - subdir = malloc (sizeof (FcGlobalCacheSubdir)); - if (!subdir) - return 0; - FcMemAlloc (FC_MEM_CACHE, sizeof (FcGlobalCacheSubdir)); - subdir->ent = d; - subdir->next = parent->subdirs; - parent->subdirs = subdir; - return &d->info; + 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); } -static void -FcGlobalCacheDirDestroy (FcGlobalCacheDir *d) +static FcCache * +FcCacheFindByStat (struct stat *cache_stat) { - FcGlobalCacheFile *f, *next; - int h; - FcGlobalCacheSubdir *s, *nexts; + FcCacheSkip *s; - for (h = 0; h < FC_GLOBAL_CACHE_FILE_HASH_SIZE; h++) - for (f = d->ents[h]; f; f = next) + 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) { - next = f->next; - FcMemFree (FC_MEM_CACHE, sizeof (FcGlobalCacheFile) + - strlen ((char *) f->info.file) + 1 + - strlen ((char *) f->name) + 1); - free (f); + s->ref++; + return s->cache; } - for (s = d->subdirs; s; s = nexts) - { - nexts = s->next; - FcMemFree (FC_MEM_CACHE, sizeof (FcGlobalCacheSubdir)); - free (s); + return NULL; +} + +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; } - FcMemFree (FC_MEM_CACHE, sizeof (FcGlobalCacheDir) + d->len + 1); - free (d); + FcCacheRemove (cache); } -/* - * If the parent is in the global cache and referenced, add - * an entry for 'dir' to the global cache. This is used - * for directories with fonts.cache files - */ +void +FcCacheObjectReference (void *object) +{ + FcCacheSkip *skip = FcCacheFindByAddr (object); + + if (skip) + skip->ref++; +} void -FcGlobalCacheReferenceSubdir (FcGlobalCache *cache, - const FcChar8 *dir) +FcCacheObjectDereference (void *object) { - FcGlobalCacheInfo *info; - info = FcGlobalCacheDirAdd (cache, dir, 0, FcFalse, FcFalse); - if (info && !info->referenced) + FcCacheSkip *skip = FcCacheFindByAddr (object); + + if (skip) { - info->referenced = FcTrue; - cache->referenced++; + skip->ref--; + if (skip->ref <= 0) + FcDirCacheDispose (skip->cache); } } -/* - * Check to see if the global cache contains valid data for 'dir'. - * If so, scan the global cache for files and directories in 'dir'. - * else, return False. - */ -FcBool -FcGlobalCacheScanDir (FcFontSet *set, - FcStrSet *dirs, - FcGlobalCache *cache, - const FcChar8 *dir, - FcConfig *config) +void +FcCacheFini (void) +{ + int i; + + for (i = 0; i < FC_CACHE_MAX_LEVEL; i++) + assert (fcCacheChains[i] == NULL); + assert (fcCacheMaxLevel == 0); +} + +static FcBool +FcCacheTimeValid (FcCache *cache, struct stat *dir_stat) { - FcGlobalCacheDir *d = FcGlobalCacheDirGet (cache, dir, - strlen ((const char *) dir), - FcFalse); - FcGlobalCacheFile *f; - int h; - int dir_len; - FcGlobalCacheSubdir *subdir; - FcBool any_in_cache = FcFalse; - - if (FcDebug() & FC_DBG_CACHE) - printf ("FcGlobalCacheScanDir %s\n", dir); - - if (!d) + struct stat dir_static; + + if (!dir_stat) { - if (FcDebug () & FC_DBG_CACHE) - printf ("\tNo dir cache entry\n"); - return FcFalse; + if (FcStat (FcCacheDir (cache), &dir_static) < 0) + return FcFalse; + dir_stat = &dir_static; } + 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; +} - /* - * See if the timestamp recorded in the global cache - * matches the directory time, if not, return False - */ - if (!FcGlobalCacheCheckTime (d->info.file, &d->info)) +/* + * Map a cache file into memory + */ +static FcCache * +FcDirCacheMapFd (int fd, struct stat *fd_stat, struct stat *dir_stat) +{ + FcCache *cache; + FcBool allocated = FcFalse; + + if (fd_stat->st_size < sizeof (FcCache)) + return NULL; + cache = FcCacheFindByStat (fd_stat); + if (cache) { - if (FcDebug () & FC_DBG_CACHE) - printf ("\tdir cache entry time mismatch\n"); - return FcFalse; + if (FcCacheTimeValid (cache, dir_stat)) + return cache; + FcDirCacheUnload (cache); + cache = NULL; } /* - * Add files from 'dir' to the fontset + * Lage cache files are mmap'ed, smaller cache files are read. This + * balances the system cost of mmap against per-process memory usage. */ - dir_len = strlen ((const char *) dir); - for (h = 0; h < FC_GLOBAL_CACHE_FILE_HASH_SIZE; h++) - for (f = d->ents[h]; f; f = f->next) + if (fd_stat->st_size >= FC_CACHE_MIN_MMAP) + { +#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) { - if (FcDebug() & FC_DBG_CACHEV) - printf ("FcGlobalCacheScanDir add file %s\n", f->info.file); - any_in_cache = FcTrue; - if (!FcCacheFontSetAdd (set, dirs, dir, dir_len, - f->info.file, f->name, config)) + HANDLE hFileMap; + + cache = NULL; + hFileMap = CreateFileMapping((HANDLE) _get_osfhandle(fd), NULL, + PAGE_READONLY, 0, 0, NULL); + if (hFileMap != NULL) { - cache->broken = FcTrue; - return FcFalse; + cache = MapViewOfFile (hFileMap, FILE_MAP_READ, 0, 0, + fd_stat->st_size); + CloseHandle (hFileMap); } - FcGlobalCacheReferenced (cache, &f->info); } - /* - * Add directories in 'dir' to 'dirs' - */ - for (subdir = d->subdirs; subdir; subdir = subdir->next) +#endif + } + if (!cache) { - FcFilePathInfo info = FcFilePathInfoGet (subdir->ent->info.file); - - any_in_cache = FcTrue; - if (!FcCacheFontSetAdd (set, dirs, dir, dir_len, - info.base, FC_FONT_FILE_DIR, config)) + cache = malloc (fd_stat->st_size); + if (!cache) + return NULL; + + if (read (fd, cache, fd_stat->st_size) != fd_stat->st_size) { - cache->broken = FcTrue; - return FcFalse; + free (cache); + return NULL; } - FcGlobalCacheReferenced (cache, &subdir->ent->info); + allocated = FcTrue; } - - FcGlobalCacheReferenced (cache, &d->info); - - /* - * To recover from a bug in previous versions of fontconfig, - * return FcFalse if no entries in the cache were found - * for this directory. This will cause any empty directories - * to get rescanned every time fontconfig is initialized. This - * might get removed at some point when the older cache files are - * presumably fixed. - */ - return any_in_cache; -} - -/* - * Locate the cache entry for a particular file - */ -FcGlobalCacheFile * -FcGlobalCacheFileGet (FcGlobalCache *cache, - const FcChar8 *file, - int id, - int *count) -{ - FcFilePathInfo i = FcFilePathInfoGet (file); - FcGlobalCacheDir *d = FcGlobalCacheDirGet (cache, i.dir, - i.dir_len, FcFalse); - FcGlobalCacheFile *f, *match = 0; - int max = -1; - - if (!d) - return 0; - for (f = d->ents[i.base_hash % FC_GLOBAL_CACHE_FILE_HASH_SIZE]; f; f = f->next) + 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 (f->info.hash == i.base_hash && - !strcmp ((const char *) f->info.file, (const char *) i.base)) + if (allocated) + free (cache); + else { - if (f->id == id) - match = f; - if (f->id > max) - max = f->id; +#if defined(HAVE_MMAP) || defined(__CYGWIN__) + munmap (cache, fd_stat->st_size); +#elif defined(_WIN32) + UnmapViewOfFile (cache); +#endif } + return NULL; } - if (count) - *count = max + 1; - return match; + + /* Mark allocated caches so they're freed rather than unmapped */ + if (allocated) + cache->magic = FC_CACHE_MAGIC_ALLOC; + + return cache; } - -/* - * Add a file entry to the cache - */ -static FcGlobalCacheInfo * -FcGlobalCacheFileAdd (FcGlobalCache *cache, - const FcChar8 *path, - int id, - time_t time, - const FcChar8 *name, - FcBool replace) + +void +FcDirCacheReference (FcCache *cache, int nref) { - FcFilePathInfo i = FcFilePathInfoGet (path); - FcGlobalCacheDir *d = FcGlobalCacheDirGet (cache, i.dir, - i.dir_len, FcTrue); - FcGlobalCacheFile *f, **prev; - int size; - - if (!d) - return 0; - for (prev = &d->ents[i.base_hash % FC_GLOBAL_CACHE_FILE_HASH_SIZE]; - (f = *prev); - prev = &(*prev)->next) - { - if (f->info.hash == i.base_hash && - f->id == id && - !strcmp ((const char *) f->info.file, (const char *) i.base)) - { - break; - } - } - if (*prev) - { - if (!replace) - return 0; - - f = *prev; - if (f->info.referenced) - cache->referenced--; - *prev = f->next; - FcMemFree (FC_MEM_CACHE, sizeof (FcGlobalCacheFile) + - strlen ((char *) f->info.file) + 1 + - strlen ((char *) f->name) + 1); - free (f); - } - size = (sizeof (FcGlobalCacheFile) + - strlen ((char *) i.base) + 1 + - strlen ((char *) name) + 1); - f = malloc (size); - if (!f) - return 0; - FcMemAlloc (FC_MEM_CACHE, size); - f->next = *prev; - *prev = f; - f->info.hash = i.base_hash; - f->info.file = (FcChar8 *) (f + 1); - f->info.time = time; - f->info.referenced = FcFalse; - f->id = id; - f->name = f->info.file + strlen ((char *) i.base) + 1; - strcpy ((char *) f->info.file, (const char *) i.base); - strcpy ((char *) f->name, (const char *) name); - return &f->info; + FcCacheSkip *skip = FcCacheFindByAddr (cache); + + if (skip) + skip->ref += nref; +} + +void +FcDirCacheUnload (FcCache *cache) +{ + FcCacheObjectDereference (cache); } -FcGlobalCache * -FcGlobalCacheCreate (void) +static FcBool +FcDirCacheMapHelper (int fd, struct stat *fd_stat, struct stat *dir_stat, void *closure) { - FcGlobalCache *cache; - int h; + FcCache *cache = FcDirCacheMapFd (fd, fd_stat, dir_stat); - cache = malloc (sizeof (FcGlobalCache)); if (!cache) - return 0; - FcMemAlloc (FC_MEM_CACHE, sizeof (FcGlobalCache)); - for (h = 0; h < FC_GLOBAL_CACHE_DIR_HASH_SIZE; h++) - cache->ents[h] = 0; - cache->entries = 0; - cache->referenced = 0; - cache->updated = FcFalse; - cache->broken = FcFalse; + return FcFalse; + *((FcCache **) closure) = cache; + return FcTrue; +} + +FcCache * +FcDirCacheLoad (const FcChar8 *dir, FcConfig *config, FcChar8 **cache_file) +{ + FcCache *cache = NULL; + + if (!FcDirCacheProcess (config, dir, + FcDirCacheMapHelper, + &cache, cache_file)) + return NULL; return cache; } -void -FcGlobalCacheDestroy (FcGlobalCache *cache) +FcCache * +FcDirCacheLoadFile (const FcChar8 *cache_file, struct stat *file_stat) { - FcGlobalCacheDir *d, *next; - int h; + int fd; + FcCache *cache; + struct stat my_file_stat; + + 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; +} - for (h = 0; h < FC_GLOBAL_CACHE_DIR_HASH_SIZE; h++) - { - for (d = cache->ents[h]; d; d = next) - { - next = d->next; - FcGlobalCacheDirDestroy (d); - } - } - FcMemFree (FC_MEM_CACHE, sizeof (FcGlobalCache)); - free (cache); +/* + * 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; +} + +static FcBool +FcDirCacheValidConfig (const FcChar8 *dir, FcConfig *config) +{ + return FcDirCacheProcess (config, dir, + FcDirCacheValidateHelper, + NULL, NULL); +} + +FcBool +FcDirCacheValid (const FcChar8 *dir) +{ + FcConfig *config; + + config = FcConfigGetCurrent (); + if (!config) + return FcFalse; + + return FcDirCacheValidConfig (dir, config); } /* - * Cache file syntax is quite simple: - * - * "file_name" id time "font_name" \n + * Build a cache structure from the given contents */ - -void -FcGlobalCacheLoad (FcGlobalCache *cache, - const FcChar8 *cache_file) +FcCache * +FcDirCacheBuild (FcFontSet *set, const FcChar8 *dir, struct stat *dir_stat, FcStrSet *dirs) { - FILE *f; - FcChar8 file_buf[8192], *file; - int id; - time_t time; - FcChar8 name_buf[8192], *name; - FcGlobalCacheInfo *info; - - f = fopen ((char *) cache_file, "r"); - if (!f) - return; - - cache->updated = FcFalse; - file = 0; - name = 0; - while ((file = FcCacheReadString (f, file_buf, sizeof (file_buf))) && - FcCacheReadInt (f, &id) && - FcCacheReadTime (f, &time) && - (name = FcCacheReadString (f, name_buf, sizeof (name_buf)))) + 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; + + /* + * 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); + + serialize->linear = cache; + + cache->magic = FC_CACHE_MAGIC_ALLOC; + cache->version = FC_CACHE_CONTENT_VERSION; + cache->size = serialize->size; + cache->mtime = (int) dir_stat->st_mtime; + + /* + * 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++) { - if (FcDebug () & FC_DBG_CACHEV) - printf ("FcGlobalCacheLoad \"%s\" \"%20.20s\"\n", file, name); - if (!FcStrCmp (name, FC_FONT_FILE_DIR)) - info = FcGlobalCacheDirAdd (cache, file, time, FcFalse, FcTrue); - else - info = FcGlobalCacheFileAdd (cache, file, id, time, name, FcFalse); - if (!info) - cache->broken = FcTrue; - else - cache->entries++; - if (FcDebug () & FC_DBG_CACHE_REF) - printf ("FcGlobalCacheLoad entry %d %s\n", - cache->entries, file); - if (file != file_buf) - free (file); - if (name != name_buf) - free (name); - file = 0; - name = 0; + FcChar8 *d_serialize = FcStrSerialize (serialize, dirs->strs[i]); + if (!d_serialize) + goto bail2; + dirs_serialize[i] = FcPtrToOffset (dirs_serialize, d_serialize); } - if (file && file != file_buf) - free (file); - if (name && name != name_buf) - free (name); - fclose (f); + + /* + * Serialize font set + */ + set_serialize = FcFontSetSerialize (serialize, set); + if (!set_serialize) + goto bail2; + cache->set = FcPtrToOffset (cache, set_serialize); + + FcSerializeDestroy (serialize); + + FcCacheInsert (cache, NULL); + + return cache; + +bail2: + free (cache); +bail1: + FcSerializeDestroy (serialize); + return NULL; } -FcBool -FcGlobalCacheUpdate (FcGlobalCache *cache, - const FcChar8 *file, - int id, - const FcChar8 *name) + +#ifdef _WIN32 +#define mkdir(path,mode) _mkdir(path) +#endif + +static FcBool +FcMakeDirectory (const FcChar8 *dir) { - const FcChar8 *match; - struct stat statb; - FcGlobalCacheInfo *info; + FcChar8 *parent; + FcBool ret; - match = file; + if (strlen ((char *) dir) == 0) + return FcFalse; - if (stat ((char *) file, &statb) < 0) + parent = FcStrDirname (dir); + if (!parent) return FcFalse; - if (S_ISDIR (statb.st_mode)) - info = FcGlobalCacheDirAdd (cache, file, statb.st_mtime, - FcTrue, FcTrue); - else - info = FcGlobalCacheFileAdd (cache, file, id, statb.st_mtime, - name, FcTrue); - if (info) - { - FcGlobalCacheReferenced (cache, info); - cache->updated = FcTrue; - } + 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 - cache->broken = FcTrue; - return info != 0; + ret = FcFalse; + FcStrFree (parent); + return ret; } +/* write serialized state to the cache file */ FcBool -FcGlobalCacheSave (FcGlobalCache *cache, - const FcChar8 *cache_file) +FcDirCacheWrite (FcCache *cache, FcConfig *config) { - FILE *f; - int dir_hash, file_hash; - FcGlobalCacheDir *dir; - FcGlobalCacheFile *file; - FcAtomic *atomic; - - if (!cache->updated && cache->referenced == cache->entries) - return FcTrue; - - if (cache->broken) - return FcFalse; + FcChar8 *dir = FcCacheDir (cache); + FcChar8 cache_base[CACHEBASE_LEN]; + FcChar8 *cache_hashed; + int fd; + FcAtomic *atomic; + FcStrList *list; + FcChar8 *cache_dir = NULL; + FcChar8 *test_dir; + FcCacheSkip *skip; + struct stat cache_stat; + int magic; + int written; -#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; - f = fopen ((char *) FcAtomicNewFile(atomic), "w"); - if (!f) - goto bail2; + /* + * Write it to the first directory in the list which is writable + */ - for (dir_hash = 0; dir_hash < FC_GLOBAL_CACHE_DIR_HASH_SIZE; dir_hash++) - { - for (dir = cache->ents[dir_hash]; dir; dir = dir->next) + list = FcStrListCreate (config->cacheDirs); + if (!list) + return FcFalse; + while ((test_dir = FcStrListNext (list))) { + if (access ((char *) test_dir, W_OK|X_OK) == 0) { - if (!dir->info.referenced) - continue; - if (!FcCacheWriteString (f, dir->info.file)) - goto bail4; - if (PUTC (' ', f) == EOF) - goto bail4; - if (!FcCacheWriteInt (f, 0)) - goto bail4; - if (PUTC (' ', f) == EOF) - goto bail4; - if (!FcCacheWriteTime (f, dir->info.time)) - goto bail4; - if (PUTC (' ', f) == EOF) - goto bail4; - if (!FcCacheWriteString (f, (FcChar8 *) FC_FONT_FILE_DIR)) - goto bail4; - if (PUTC ('\n', f) == EOF) - goto bail4; - - for (file_hash = 0; file_hash < FC_GLOBAL_CACHE_FILE_HASH_SIZE; file_hash++) - { - for (file = dir->ents[file_hash]; file; file = file->next) + 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)) { - if (!file->info.referenced) - continue; - if (!FcCacheWritePath (f, dir->info.file, file->info.file)) - goto bail4; - if (PUTC (' ', f) == EOF) - goto bail4; - if (!FcCacheWriteInt (f, file->id < 0 ? 0 : file->id)) - goto bail4; - if (PUTC (' ', f) == EOF) - goto bail4; - if (!FcCacheWriteTime (f, file->info.time)) - goto bail4; - if (PUTC (' ', f) == EOF) - goto bail4; - if (!FcCacheWriteString (f, file->name)) - goto bail4; - if (PUTC ('\n', f) == EOF) - goto bail4; + 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 (fclose (f) == EOF) - goto bail3; - - if (!FcAtomicReplaceOrig (atomic)) + FcDirCacheBasename (dir, cache_base); + cache_hashed = FcStrPlus (cache_dir, cache_base); + if (!cache_hashed) + return FcFalse; + + if (FcDebug () & FC_DBG_CACHE) + printf ("FcDirCacheWriteDir dir \"%s\" file \"%s\"\n", + dir, cache_hashed); + + atomic = FcAtomicCreate ((FcChar8 *)cache_hashed); + if (!atomic) + goto bail1; + + if (!FcAtomicLock (atomic)) goto bail3; - + + fd = open((char *)FcAtomicNewFile (atomic), O_RDWR | O_CREAT | O_BINARY, 0666); + if (fd == -1) + goto bail4; + + /* Temporarily switch magic to MMAP while writing to file */ + magic = cache->magic; + if (magic != FC_CACHE_MAGIC_MMAP) + cache->magic = FC_CACHE_MAGIC_MMAP; + + /* + * Write cache contents to file + */ + written = write (fd, cache, cache->size); + + /* Switch magic back */ + if (magic != FC_CACHE_MAGIC_MMAP) + cache->magic = magic; + + if (written != cache->size) + { + perror ("write cache"); + goto bail5; + } + + close(fd); + if (!FcAtomicReplaceOrig(atomic)) + goto bail4; + + /* 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)) + { + skip->cache_dev = cache_stat.st_dev; + skip->cache_ino = cache_stat.st_ino; + skip->cache_mtime = cache_stat.st_mtime; + } + + FcStrFree (cache_hashed); FcAtomicUnlock (atomic); FcAtomicDestroy (atomic); - - cache->updated = FcFalse; return FcTrue; -bail4: - fclose (f); -bail3: - FcAtomicDeleteNew (atomic); -bail2: + bail5: + close (fd); + bail4: FcAtomicUnlock (atomic); -bail1: + bail3: FcAtomicDestroy (atomic); -bail0: + bail1: + FcStrFree (cache_hashed); return FcFalse; } -FcBool -FcDirCacheValid (const FcChar8 *dir) +/* + * 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) + +const FcChar8 * +FcCacheDir args1(const FcCache *c) { - FcChar8 *cache_file = FcStrPlus (dir, (FcChar8 *) "/" FC_DIR_CACHE_FILE); - struct stat file_stat, dir_stat; + return FcCacheDir (c); +} - if (stat ((char *) dir, &dir_stat) < 0) - { - FcStrFree (cache_file); - return FcFalse; - } - if (stat ((char *) cache_file, &file_stat) < 0) +FcFontSet * +FcCacheCopySet args1(const FcCache *c) +{ + FcFontSet *old = FcCacheSet (c); + FcFontSet *new = FcFontSetCreate (); + int i; + + if (!new) + return NULL; + for (i = 0; i < old->nfont; i++) { - FcStrFree (cache_file); - return FcFalse; + FcPattern *font = FcFontSetFont (old, i); + + FcPatternReference (font); + if (!FcFontSetAdd (new, font)) + { + FcFontSetDestroy (new); + return NULL; + } } - 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; - return FcTrue; + return new; } -FcBool -FcDirCacheReadDir (FcFontSet *set, FcStrSet *dirs, const FcChar8 *dir, FcConfig *config) +const FcChar8 * +FcCacheSubdir args2(const FcCache *c, int i) { - FcChar8 *cache_file = FcStrPlus (dir, (FcChar8 *) "/" FC_DIR_CACHE_FILE); - FILE *f; - FcChar8 *base; - int id; - int dir_len; - FcChar8 file_buf[8192], *file; - FcChar8 name_buf[8192], *name; - FcBool ret = FcFalse; - - if (!cache_file) - goto bail0; - - if (FcDebug () & FC_DBG_CACHE) - printf ("FcDirCacheReadDir cache_file \"%s\"\n", cache_file); - - f = fopen ((char *) cache_file, "r"); - if (!f) - { - if (FcDebug () & FC_DBG_CACHE) - printf (" no cache file\n"); - goto bail1; - } + return FcCacheSubdir (c, i); +} - if (!FcDirCacheValid (dir)) - { - if (FcDebug () & FC_DBG_CACHE) - printf (" cache file older than directory\n"); - goto bail2; - } - - base = (FcChar8 *) strrchr ((char *) cache_file, '/'); - if (!base) - goto bail2; - base++; - dir_len = base - cache_file; - - file = 0; - name = 0; - while ((file = FcCacheReadString (f, file_buf, sizeof (file_buf))) && - FcCacheReadInt (f, &id) && - (name = FcCacheReadString (f, name_buf, sizeof (name_buf)))) - { - if (!FcCacheFontSetAdd (set, dirs, cache_file, dir_len, - file, name, config)) - goto bail3; - if (file != file_buf) - free (file); - if (name != name_buf) - free (name); - file = name = 0; - } - if (FcDebug () & FC_DBG_CACHE) - printf (" cache loaded\n"); - - ret = FcTrue; -bail3: - if (file && file != file_buf) - free (file); - if (name && name != name_buf) - free (name); -bail2: - fclose (f); -bail1: - FcStrFree (cache_file); -bail0: - return ret; +int +FcCacheNumSubdir args1(const FcCache *c) +{ + return c->dirs_count; +} + +int +FcCacheNumFont args1(const FcCache *c) +{ + return FcCacheSet(c)->nfont; } /* - * return the path from the directory containing 'cache' to 'file' + * 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. */ -static const FcChar8 * -FcFileBaseName (const FcChar8 *cache, const FcChar8 *file) +#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) { - const FcChar8 *cache_slash; + ctx->buf[0] = 0x67452301; + ctx->buf[1] = 0xefcdab89; + ctx->buf[2] = 0x98badcfe; + ctx->buf[3] = 0x10325476; - cache_slash = FcStrLastSlash (cache); - if (cache_slash && !strncmp ((const char *) cache, (const char *) file, - (cache_slash + 1) - cache)) - return file + ((cache_slash + 1) - cache); - return file; + ctx->bits[0] = 0; + ctx->bits[1] = 0; } -FcBool -FcDirCacheWriteDir (FcFontSet *set, FcStrSet *dirs, const FcChar8 *dir) +/* + * Update context to reflect the concatenation of another buffer full + * of bytes. + */ +static void MD5Update(struct MD5Context *ctx, const unsigned char *buf, unsigned len) { - FcChar8 *cache_file = FcStrPlus (dir, (FcChar8 *) "/" FC_DIR_CACHE_FILE); - FcPattern *font; - FILE *f; - FcChar8 *name; - const FcChar8 *file, *base; - int n; - int id; - FcBool ret; - FcStrList *list; + FcChar32 t; - if (!cache_file) - goto bail0; - if (FcDebug () & FC_DBG_CACHE) - printf ("FcDirCacheWriteDir cache_file \"%s\"\n", cache_file); - - f = fopen ((char *) cache_file, "w"); - if (!f) - { - if (FcDebug () & FC_DBG_CACHE) - printf (" can't create \"%s\"\n", cache_file); - goto bail1; + /* 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; } - - list = FcStrListCreate (dirs); - if (!list) - goto bail2; - - while ((dir = FcStrListNext (list))) - { - base = FcFileBaseName (cache_file, dir); - if (!FcCacheWriteString (f, base)) - goto bail3; - if (PUTC (' ', f) == EOF) - goto bail3; - if (!FcCacheWriteInt (f, 0)) - goto bail3; - if (PUTC (' ', f) == EOF) - goto bail3; - if (!FcCacheWriteString (f, FC_FONT_FILE_DIR)) - goto bail3; - if (PUTC ('\n', f) == EOF) - goto bail3; + /* 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; } - - for (n = 0; n < set->nfont; n++) - { - font = set->fonts[n]; - if (FcPatternGetString (font, FC_FILE, 0, (FcChar8 **) &file) != FcResultMatch) - goto bail3; - base = FcFileBaseName (cache_file, file); - if (FcPatternGetInteger (font, FC_INDEX, 0, &id) != FcResultMatch) - goto bail3; - if (FcDebug () & FC_DBG_CACHEV) - printf (" write file \"%s\"\n", base); - if (!FcCacheWriteString (f, base)) - goto bail3; - if (PUTC (' ', f) == EOF) - goto bail3; - if (!FcCacheWriteInt (f, id)) - goto bail3; - if (PUTC (' ', f) == EOF) - goto bail3; - name = FcNameUnparse (font); - if (!name) - goto bail3; - ret = FcCacheWriteString (f, name); - FcStrFree (name); - if (!ret) - goto bail3; - if (PUTC ('\n', f) == EOF) - goto bail3; + + /* 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); } - - FcStrListDone (list); + byteReverse(ctx->in, 14); - if (fclose (f) == EOF) - goto bail1; - - FcStrFree (cache_file); + /* Append length in bits and transform */ + ((FcChar32 *) ctx->in)[14] = ctx->bits[0]; + ((FcChar32 *) ctx->in)[15] = ctx->bits[1]; - if (FcDebug () & FC_DBG_CACHE) - printf (" cache written\n"); - return FcTrue; - -bail3: - FcStrListDone (list); -bail2: - fclose (f); -bail1: - unlink ((char *) cache_file); - FcStrFree (cache_file); -bail0: - return FcFalse; + 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; } +#define __fccache__ +#include "fcaliastail.h" +#undef __fccache__