/*
- * $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
*
* Permission to use, copy, modify, distribute, and sell this software and its
* documentation for any purpose is hereby granted without fee, provided that
* PERFORMANCE OF THIS SOFTWARE.
*/
-#include <fcntl.h>
-#include <sys/mman.h>
-#include <sys/utsname.h>
#include "fcint.h"
+#include "../fc-arch/fcarch.h"
+#include <stdio.h>
+#include <fcntl.h>
+#include <dirent.h>
+#include <string.h>
+#include <sys/types.h>
+#if defined(HAVE_MMAP) || defined(__CYGWIN__)
+# include <unistd.h>
+# include <sys/mman.h>
+#elif defined(_WIN32)
+# include <windows.h>
+#endif
+
+#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, 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 PAGESIZE 8192
+#define CACHEBASE_LEN (1 + 32 + 1 + sizeof (FC_ARCHITECTURE) + sizeof (FC_CACHE_SUFFIX))
-static FcBool force;
+static const char bin2hex[] = { '0', '1', '2', '3',
+ '4', '5', '6', '7',
+ '8', '9', 'a', 'b',
+ 'c', 'd', 'e', 'f' };
static FcChar8 *
-FcCacheReadString (int fd, FcChar8 *dest, int len)
+FcDirCacheBasename (const FcChar8 * dir, FcChar8 cache_base[CACHEBASE_LEN])
{
- FcChar8 c;
- FcBool escape;
- int size;
- int i;
+ unsigned char hash[16];
+ FcChar8 *hex_hash;
+ int cnt;
+ struct MD5Context ctx;
- if (len == 0)
- return FcFalse;
-
- size = len;
- i = 0;
- escape = FcFalse;
- while (read (fd, &c, 1) == 1)
+ MD5Init (&ctx);
+ MD5Update (&ctx, (unsigned char *)dir, strlen ((char *) dir));
+
+ MD5Final (hash, &ctx);
+
+ cache_base[0] = '/';
+ hex_hash = cache_base + 1;
+ for (cnt = 0; cnt < 16; ++cnt)
{
- if (!escape)
- {
- switch (c) {
- case '"':
- c = '\0';
- break;
- case '\\':
- escape = FcTrue;
- continue;
- }
- }
- if (i == size)
- {
- dest[i++] = 0;
- return dest;
- }
- dest[i++] = c;
- if (c == '\0')
- return dest;
- escape = FcFalse;
+ hex_hash[2*cnt ] = bin2hex[hash[cnt] >> 4];
+ hex_hash[2*cnt+1] = bin2hex[hash[cnt] & 0xf];
}
- return 0;
-}
+ hex_hash[2*cnt] = 0;
+ strcat ((char *) cache_base, "-" FC_ARCHITECTURE FC_CACHE_SUFFIX);
-static FcBool
-FcCacheWriteString (int fd, const FcChar8 *chars)
-{
- if (write (fd, chars, strlen(chars)+1) != strlen(chars)+1)
- return FcFalse;
- return FcTrue;
+ return cache_base;
}
-#if 0
-/*
- * Verify the saved timestamp for a file
- */
FcBool
-FcGlobalCacheCheckTime (const FcChar8 *file, FcGlobalCacheInfo *info)
+FcDirCacheUnlink (const FcChar8 *dir, FcConfig *config)
{
- struct stat statb;
+ FcChar8 *cache_hashed = NULL;
+ FcChar8 cache_base[CACHEBASE_LEN];
+ FcStrList *list;
+ FcChar8 *cache_dir;
+
+ FcDirCacheBasename (dir, cache_base);
- if (stat ((char *) file, &statb) < 0)
+ list = FcStrListCreate (config->cacheDirs);
+ if (!list)
+ return FcFalse;
+
+ while ((cache_dir = FcStrListNext (list)))
{
- if (FcDebug () & FC_DBG_CACHE)
- printf (" file %s missing\n", file);
- return FcFalse;
+ cache_hashed = FcStrPlus (cache_dir, cache_base);
+ if (!cache_hashed)
+ break;
+ (void) unlink ((char *) cache_hashed);
}
- 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);
+ FcStrListDone (list);
+ /* return FcFalse if something went wrong */
+ if (cache_dir)
return FcFalse;
- }
return FcTrue;
}
-void
-FcGlobalCacheReferenced (FcGlobalCache *cache,
- FcGlobalCacheInfo *info)
+static int
+FcCacheReadDirs (FcConfig * config,
+ FcStrList *list, FcFontSet * set, FcStrSet *processed_dirs)
{
- if (!info->referenced)
+ int ret = 0;
+ FcChar8 *dir;
+ FcStrSet *subdirs;
+ FcStrList *sublist;
+
+ /*
+ * Read in the results from 'list'.
+ */
+ while ((dir = FcStrListNext (list)))
{
- info->referenced = FcTrue;
- cache->referenced++;
- if (FcDebug () & FC_DBG_CACHE_REF)
- printf ("Reference %d %s\n", cache->referenced, info->file);
- }
-}
+ if (!FcConfigAcceptFilename (config, dir))
+ continue;
-/*
- * 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
- */
+ /* Skip this directory if already updated
+ * to avoid the looped directories via symlinks
+ * Clearly a dir not in fonts.conf shouldn't be globally cached.
+ */
-typedef struct _FcFilePathInfo {
- const FcChar8 *dir;
- int dir_len;
- const FcChar8 *base;
- unsigned int base_hash;
-} FcFilePathInfo;
+ if (FcStrSetMember (processed_dirs, dir))
+ continue;
+ if (!FcStrSetAdd (processed_dirs, dir))
+ continue;
-static FcFilePathInfo
-FcFilePathInfoGet (const FcChar8 *path)
-{
- FcFilePathInfo i;
- FcChar8 *slash;
-
- slash = FcStrLastSlash (path);
- if (slash)
- {
- i.dir = path;
- i.dir_len = slash - path;
- if (!i.dir_len)
- i.dir_len = 1;
- i.base = slash + 1;
- }
- else
- {
- i.dir = (const FcChar8 *) ".";
- i.dir_len = 1;
- i.base = path;
+ subdirs = FcStrSetCreate ();
+ if (!subdirs)
+ {
+ fprintf (stderr, "Can't create directory set\n");
+ ret++;
+ continue;
+ }
+
+ FcDirScanConfig (set, subdirs,
+ config->blanks, dir, FcFalse, config);
+
+ sublist = FcStrListCreate (subdirs);
+ FcStrSetDestroy (subdirs);
+ if (!sublist)
+ {
+ fprintf (stderr, "Can't create subdir list in \"%s\"\n", dir);
+ ret++;
+ continue;
+ }
+ ret += FcCacheReadDirs (config, sublist, set, processed_dirs);
}
- i.base_hash = FcCacheHash (i.base, -1);
- return i;
+ FcStrListDone (list);
+ return ret;
}
-FcGlobalCache *
-FcGlobalCacheCreate (void)
+FcFontSet *
+FcCacheRead (FcConfig *config)
{
- FcGlobalCache *cache;
- int h;
+ FcFontSet *s = FcFontSetCreate();
+ FcStrSet *processed_dirs;
- cache = malloc (sizeof (FcGlobalCache));
- if (!cache)
+ if (!s)
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 cache;
+
+ processed_dirs = FcStrSetCreate();
+ if (!processed_dirs)
+ goto bail;
+
+ if (FcCacheReadDirs (config, FcConfigGetConfigDirs (config), s, processed_dirs))
+ goto bail1;
+
+ FcStrSetDestroy (processed_dirs);
+ return s;
+
+ bail1:
+ FcStrSetDestroy (processed_dirs);
+ bail:
+ FcFontSetDestroy (s);
+ return 0;
}
-void
-FcGlobalCacheDestroy (FcGlobalCache *cache)
+/*
+ * Look for a cache file for the specified dir. Attempt
+ * to use each one we find, stopping when the callback
+ * indicates success
+ */
+static FcBool
+FcDirCacheProcess (FcConfig *config, const FcChar8 *dir,
+ FcBool (*callback) (int fd, off_t size, void *closure),
+ void *closure)
{
- FcGlobalCacheDir *d, *next;
- int h;
+ int fd = -1;
+ FcChar8 cache_base[CACHEBASE_LEN];
+ FcStrList *list;
+ FcChar8 *cache_dir;
+ struct stat file_stat, dir_stat;
+ FcBool ret = FcFalse;
+
+ if (stat ((char *) dir, &dir_stat) < 0)
+ return FcFalse;
- for (h = 0; h < FC_GLOBAL_CACHE_DIR_HASH_SIZE; h++)
+ FcDirCacheBasename (dir, cache_base);
+
+ list = FcStrListCreate (config->cacheDirs);
+ if (!list)
+ return FcFalse;
+
+ while ((cache_dir = FcStrListNext (list)))
{
- for (d = cache->ents[h]; d; d = next)
- {
- next = d->next;
- FcGlobalCacheDirDestroy (d);
+ FcChar8 *cache_hashed = FcStrPlus (cache_dir, cache_base);
+ if (!cache_hashed)
+ break;
+ fd = open((char *) cache_hashed, O_RDONLY | O_BINARY);
+ FcStrFree (cache_hashed);
+ if (fd >= 0) {
+ if (fstat (fd, &file_stat) >= 0 &&
+ dir_stat.st_mtime <= file_stat.st_mtime)
+ {
+ ret = (*callback) (fd, file_stat.st_size, closure);
+ if (ret)
+ {
+ close (fd);
+ break;
+ }
+ }
+ close (fd);
}
}
- FcMemFree (FC_MEM_CACHE, sizeof (FcGlobalCache));
- free (cache);
+ FcStrListDone (list);
+
+ return ret;
}
-/*
- * Cache file syntax is quite simple:
- *
- * "file_name" id time "font_name" \n
- */
-
-void
-FcGlobalCacheLoad (FcGlobalCache *cache,
- const FcChar8 *cache_file)
+static FcBool
+FcDirCacheLoad (int fd, off_t size, void *closure)
{
- 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;
+ FcCache *cache;
+ FcBool allocated = FcFalse;
- 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))))
+ if (size < sizeof (FcCache))
+ return FcFalse;
+#if defined(HAVE_MMAP) || defined(__CYGWIN__)
+ cache = mmap (0, size, PROT_READ, MAP_SHARED, fd, 0);
+#elif defined(_WIN32)
{
- 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;
+ 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, size);
+ CloseHandle (hFileMap);
+ }
+ }
+#endif
+ if (!cache)
+ {
+ cache = malloc (size);
+ if (!cache)
+ return FcFalse;
+
+ if (read (fd, cache, size) != size)
+ {
+ free (cache);
+ return FcFalse;
+ }
+ allocated = FcTrue;
+ }
+ if (cache->magic != FC_CACHE_MAGIC ||
+ cache->size != size)
+ {
+ if (allocated)
+ free (cache);
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;
+ {
+#if defined(HAVE_MMAP) || defined(__CYGWIN__)
+ munmap (cache, size);
+#elif defined(_WIN32)
+ UnmapViewOfFile (cache);
+#endif
+ }
+ return FcFalse;
}
- if (file && file != file_buf)
- free (file);
- if (name && name != name_buf)
- free (name);
- fclose (f);
+
+ /* Mark allocated caches so they're freed rather than unmapped */
+ if (allocated)
+ cache->magic = FC_CACHE_MAGIC_COPY;
+
+ *((FcCache **) closure) = cache;
+ return FcTrue;
}
-FcBool
-FcGlobalCacheUpdate (FcGlobalCache *cache,
- const FcChar8 *file,
- int id,
- const FcChar8 *name)
+FcCache *
+FcDirCacheMap (int fd, off_t size)
{
- const FcChar8 *match;
- struct stat statb;
- FcGlobalCacheInfo *info;
-
- match = file;
+ FcCache *cache;
- if (stat ((char *) file, &statb) < 0)
- 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;
- }
- else
- cache->broken = FcTrue;
- return info != 0;
+ if (FcDirCacheLoad (fd, size, &cache))
+ return cache;
+ return NULL;
}
FcBool
-FcGlobalCacheSave (FcGlobalCache *cache,
- const FcChar8 *cache_file)
+FcDirCacheRead (FcFontSet * set, FcStrSet * dirs,
+ const FcChar8 *dir, 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;
+ FcCache *cache;
+ int i;
+ FcFontSet *cache_set;
+ intptr_t *cache_dirs;
+ FcPattern **cache_fonts;
-#if defined (HAVE_GETUID) && defined (HAVE_GETEUID)
- /* Set-UID programs can't safely update the cache */
- if (getuid () != geteuid ())
+ if (!FcDirCacheProcess (config, dir,
+ FcDirCacheLoad,
+ &cache))
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;
-
- for (dir_hash = 0; dir_hash < FC_GLOBAL_CACHE_DIR_HASH_SIZE; dir_hash++)
+ cache_set = FcCacheSet (cache);
+ cache_fonts = FcFontSetFonts(cache_set);
+ if (FcDebug() & FC_DBG_CACHE)
+ printf ("FcDirCacheRead mapped cache for %s (%d fonts %d subdirs)\n",
+ dir, cache_set->nfont, cache->dirs_count);
+ for (i = 0; i < cache_set->nfont; i++)
{
- for (dir = cache->ents[dir_hash]; dir; dir = dir->next)
- {
- 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)
- {
- 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;
- }
- }
+ FcPattern *font = FcEncodedOffsetToPtr (cache_set,
+ cache_fonts[i],
+ FcPattern);
+ if (FcDebug() & FC_DBG_CACHEV) {
+ printf ("Mapped font %d\n", i);
+ FcPatternPrint (font);
}
+ FcFontSetAdd (set, font);
}
-
- if (fclose (f) == EOF)
- goto bail3;
- if (!FcAtomicReplaceOrig (atomic))
- goto bail3;
+ cache_dirs = FcCacheDirs (cache);
+ for (i = 0; i < cache->dirs_count; i++)
+ FcStrSetAdd (dirs, FcOffsetToPtr (cache_dirs,
+ cache_dirs[i],
+ FcChar8));
+
+ if (config)
+ FcConfigAddFontDir (config, (FcChar8 *)dir);
- FcAtomicUnlock (atomic);
- FcAtomicDestroy (atomic);
-
- cache->updated = FcFalse;
return FcTrue;
-
-bail4:
- fclose (f);
-bail3:
- FcAtomicDeleteNew (atomic);
-bail2:
- FcAtomicUnlock (atomic);
-bail1:
- FcAtomicDestroy (atomic);
-bail0:
- return FcFalse;
}
-#endif
-
-/*
- * Find the next presumably-mmapable offset after the current file
- * pointer.
- */
-int
-FcCacheNextOffset(int fd)
+
+static FcBool
+FcDirCacheValidate (int fd, off_t size, void *closure)
{
- off_t w;
- w = lseek(fd, 0, SEEK_END);
-
- if (w % PAGESIZE == 0)
- return w;
- else
- return ((w / PAGESIZE)+1)*PAGESIZE;
+ FcBool ret = FcTrue;
+ FcCache c;
+ struct stat file_stat;
+
+ if (read (fd, &c, sizeof (FcCache)) != sizeof (FcCache))
+ ret = FcFalse;
+ else if (fstat (fd, &file_stat) < 0)
+ ret = FcFalse;
+ else if (c.magic != FC_CACHE_MAGIC)
+ ret = FcFalse;
+ else if (file_stat.st_size != c.size)
+ ret = FcFalse;
+ return ret;
}
-/* will go away once we use config->cache */
-#define CACHE_DEFAULT_TMPDIR "/tmp"
-#define CACHE_DEFAULT_NAME "/fontconfig-mmap"
-static char *
-FcCacheFilename(void)
+FcBool
+FcDirCacheValid (const FcChar8 *dir, FcConfig *config)
{
- struct utsname b;
- static char * name = 0;
-
- if (name)
- return name;
-
- if (uname(&b) == -1)
- name = CACHE_DEFAULT_NAME;
- else
- {
- char * tmpname = getenv("TMPDIR");
- char * logname = getenv("LOGNAME");
- if (!tmpname)
- tmpname = CACHE_DEFAULT_TMPDIR;
-
- name = malloc(strlen(CACHE_DEFAULT_NAME) +
- strlen(tmpname) +
- (logname ? strlen(logname) : 0) + 5);
- strcpy(name, tmpname);
- strcat(name, CACHE_DEFAULT_NAME);
- strcat(name, "-");
- strcat(name, logname ? logname : "");
- }
- return name;
+ return FcDirCacheProcess (config, dir, FcDirCacheValidate, NULL);
}
-/*
- * Wipe out static state.
- */
void
-FcCacheClearStatic()
+FcDirCacheUnmap (FcCache *cache)
{
- FcFontSetClearStatic();
- FcPatternClearStatic();
- FcValueListClearStatic();
- FcObjectClearStatic();
- FcMatrixClearStatic();
- FcCharSetClearStatic();
- FcLangSetClearStatic();
+ if (cache->magic == FC_CACHE_MAGIC_COPY)
+ {
+ free (cache);
+ return;
+ }
+#if defined(HAVE_MMAP) || defined(__CYGWIN__)
+ munmap (cache, cache->size);
+#elif defined(_WIN32)
+ UnmapViewOfFile (cache);
+#endif
}
/*
- * Trigger the counting phase: this tells us how much to allocate.
+ * Cache file is:
+ *
+ * FcCache
+ * dir name
+ * subdirs
+ * FcFontSet
*/
-FcBool
-FcCachePrepareSerialize (FcConfig * config)
-{
- int i;
- for (i = FcSetSystem; i <= FcSetApplication; i++)
- if (config->fonts[i] && !FcFontSetPrepareSerialize(config->fonts[i]))
- return FcFalse;
- return FcTrue;
-}
-/* allocate and populate static structures */
-FcBool
-FcCacheSerialize (FcConfig * config)
+static FcCache *
+FcDirCacheProduce (FcFontSet *set, const FcChar8 *dir, FcStrSet *dirs)
{
+ FcSerialize *serialize = FcSerializeCreate ();
+ FcCache *cache;
int i;
- for (i = FcSetSystem; i <= FcSetApplication; i++)
- if (config->fonts[i] && !FcFontSetSerialize(config->fonts[i]))
- return FcFalse;
- return FcTrue;
+ 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;
+ cache->size = serialize->size;
+
+ /*
+ * 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++)
+ {
+ FcChar8 *d_serialize = FcStrSerialize (serialize, dirs->strs[i]);
+ if (!d_serialize)
+ goto bail2;
+ dirs_serialize[i] = FcPtrToOffset (dirs_serialize, d_serialize);
+ }
+
+ /*
+ * Serialize font set
+ */
+ set_serialize = FcFontSetSerialize (serialize, set);
+ if (!set_serialize)
+ goto bail2;
+ cache->set = FcPtrToOffset (cache, set_serialize);
+
+ FcSerializeDestroy (serialize);
+
+ return cache;
+
+bail2:
+ free (cache);
+bail1:
+ FcSerializeDestroy (serialize);
+ return NULL;
}
-/* get the current arch name */
-/* caller is responsible for freeing returned pointer */
-static char *
-FcCacheGetCurrentArch (void)
+static FcBool
+FcMakeDirectory (const FcChar8 *dir)
{
- struct utsname b;
- char * current_arch_machine_name;
-
- if (uname(&b) == -1)
+ FcChar8 *parent;
+ FcBool ret;
+
+ if (strlen ((char *) dir) == 0)
+ return FcFalse;
+
+ parent = FcStrDirname (dir);
+ if (!parent)
return FcFalse;
- current_arch_machine_name = strdup(b.machine);
- /* if (getenv ("FAKE_ARCH")) // testing purposes
- current_arch_machine_name = strdup(getenv("FAKE_ARCH")); */
- return current_arch_machine_name;
+ if (access ((char *) parent, W_OK|X_OK) == 0)
+ ret = mkdir ((char *) dir, 0777) == 0;
+ else if (access ((char *) parent, F_OK) == -1)
+ ret = FcMakeDirectory (parent) && (mkdir ((char *) dir, 0777) == 0);
+ else
+ ret = FcFalse;
+ FcStrFree (parent);
+ return ret;
}
-/* 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)
+/* write serialized state to the cache file */
+FcBool
+FcDirCacheWrite (FcFontSet *set, FcStrSet *dirs, const FcChar8 *dir, FcConfig *config)
{
- char candidate_arch_machine_name[64], bytes_to_skip[7];
- off_t current_arch_start = 0;
-
- /* skip arches that are not the current arch */
- while (1)
- {
- long bs;
-
- lseek (fd, current_arch_start, SEEK_SET);
- if (FcCacheReadString (fd, candidate_arch_machine_name,
- sizeof (candidate_arch_machine_name)) == 0)
- break;
- if (FcCacheReadString (fd, bytes_to_skip, 7) == 0)
- break;
- bs = a64l(bytes_to_skip);
- if (bs == 0)
- break;
-
- if (strcmp (candidate_arch_machine_name, arch)==0)
+ FcChar8 cache_base[CACHEBASE_LEN];
+ FcChar8 *cache_hashed;
+ int fd;
+ FcAtomic *atomic;
+ FcCache *cache;
+ FcStrList *list;
+ FcChar8 *cache_dir = NULL;
+ FcChar8 *test_dir;
+
+ /*
+ * Write it to the first directory in the list which is writable
+ */
+
+ list = FcStrListCreate (config->cacheDirs);
+ if (!list)
+ return FcFalse;
+ while ((test_dir = FcStrListNext (list))) {
+ if (access ((char *) test_dir, W_OK|X_OK) == 0)
+ {
+ cache_dir = test_dir;
break;
- current_arch_start += bs;
+ }
+ else
+ {
+ /*
+ * If the directory doesn't exist, try to create it
+ */
+ if (access ((char *) test_dir, F_OK) == -1) {
+ if (FcMakeDirectory (test_dir))
+ {
+ cache_dir = test_dir;
+ break;
+ }
+ }
+ }
}
+ FcStrListDone (list);
+ if (!cache_dir)
+ return FcFalse;
- if (strcmp (candidate_arch_machine_name, arch)!=0)
- return -1;
-
- return current_arch_start;
-}
+ FcDirCacheBasename (dir, cache_base);
+ cache_hashed = FcStrPlus (cache_dir, cache_base);
+ if (!cache_hashed)
+ return FcFalse;
-/* 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. */
-#define BUF_SIZE 8192
+ cache = FcDirCacheProduce (set, dir, dirs);
-static FcBool
-FcCacheMoveDown (int fd, off_t start)
-{
- char * buf = malloc (BUF_SIZE);
- char candidate_arch_machine_name[64], bytes_to_skip[7];
- long bs; off_t pos;
- int c, bytes_skipped;
+ if (!cache)
+ goto bail1;
- if (!buf)
- return FcFalse;
+ if (FcDebug () & FC_DBG_CACHE)
+ printf ("FcDirCacheWriteDir dir \"%s\" file \"%s\"\n",
+ dir, cache_hashed);
- lseek (fd, start, SEEK_SET);
- if (FcCacheReadString (fd, candidate_arch_machine_name,
- sizeof (candidate_arch_machine_name)) == 0)
- goto done;
- if (FcCacheReadString (fd, bytes_to_skip, 7) == 0)
- goto done;
+ atomic = FcAtomicCreate ((FcChar8 *)cache_hashed);
+ if (!atomic)
+ goto bail2;
- bs = a64l(bytes_to_skip);
- if (bs == 0)
- goto done;
+ if (!FcAtomicLock (atomic))
+ goto bail3;
- bytes_skipped = 0;
- do
+ fd = open((char *)FcAtomicNewFile (atomic), O_RDWR | O_CREAT | O_BINARY, 0666);
+ if (fd == -1)
+ goto bail4;
+
+ if (write (fd, cache, cache->size) != cache->size)
{
- lseek (fd, start+bs+bytes_skipped, SEEK_SET);
- if ((c = read (fd, buf, BUF_SIZE)) <= 0)
- break;
- lseek (fd, start+bytes_skipped, SEEK_SET);
- if (write (fd, buf, c) < 0)
- goto bail;
- bytes_skipped += c;
+ perror ("write cache");
+ goto bail5;
}
- while (c > 0);
- lseek (fd, start+bytes_skipped, SEEK_SET);
- done:
- free (buf);
+ close(fd);
+ if (!FcAtomicReplaceOrig(atomic))
+ goto bail4;
+ FcStrFree ((FcChar8 *)cache_hashed);
+ FcAtomicUnlock (atomic);
+ FcAtomicDestroy (atomic);
return FcTrue;
- bail:
- free (buf);
+ bail5:
+ close (fd);
+ bail4:
+ FcAtomicUnlock (atomic);
+ bail3:
+ FcAtomicDestroy (atomic);
+ bail2:
+ free (cache);
+ bail1:
+ FcStrFree ((FcChar8 *)cache_hashed);
return FcFalse;
}
-/* read serialized state from the cache file */
-FcBool
-FcCacheRead (FcConfig *config)
+/*
+ * This code implements the MD5 message-digest algorithm.
+ * The algorithm is due to Ron Rivest. This code was
+ * written by Colin Plumb in 1993, no copyright is claimed.
+ * This code is in the public domain; do with it what you wish.
+ *
+ * Equivalent code is available from RSA Data Security, Inc.
+ * This code has been tested against that, and is equivalent,
+ * except that you don't need to include two pages of legalese
+ * with every copy.
+ *
+ * To compute the message digest of a chunk of bytes, declare an
+ * MD5Context structure, pass it to MD5Init, call MD5Update as
+ * needed on buffers full of bytes, and then call MD5Final, which
+ * will fill a supplied 16-byte array with the digest.
+ */
+
+#ifndef HIGHFIRST
+#define byteReverse(buf, len) /* Nothing */
+#else
+/*
+ * Note: this code is harmless on little-endian machines.
+ */
+void byteReverse(unsigned char *buf, unsigned longs)
{
- int fd, i;
- FcCache metadata;
- char * current_arch_machine_name;
- char candidate_arch_machine_name[64], bytes_in_block[7];
- off_t current_arch_start = 0;
+ 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
- if (force)
- return FcFalse;
+/*
+ * Start MD5 accumulation. Set bit count to 0 and buffer to mysterious
+ * initialization constants.
+ */
+static void MD5Init(struct MD5Context *ctx)
+{
+ ctx->buf[0] = 0x67452301;
+ ctx->buf[1] = 0xefcdab89;
+ ctx->buf[2] = 0x98badcfe;
+ ctx->buf[3] = 0x10325476;
- fd = open(FcCacheFilename(), O_RDONLY);
- if (fd == -1)
- return FcFalse;
+ ctx->bits[0] = 0;
+ ctx->bits[1] = 0;
+}
- current_arch_machine_name = FcCacheGetCurrentArch();
- current_arch_start = FcCacheSkipToArch(fd, current_arch_machine_name);
- if (current_arch_start < 0)
- goto bail;
+/*
+ * Update context to reflect the concatenation of another buffer full
+ * of bytes.
+ */
+static void MD5Update(struct MD5Context *ctx, unsigned char *buf, unsigned len)
+{
+ FcChar32 t;
- lseek (fd, current_arch_start, SEEK_SET);
- if (FcCacheReadString (fd, candidate_arch_machine_name,
- sizeof (candidate_arch_machine_name)) == 0)
- goto bail;
- if (FcCacheReadString (fd, bytes_in_block, 7) == 0)
- goto bail;
+ /* Update bitcount */
- // sanity check for endianness issues
- read(fd, &metadata, sizeof(FcCache));
- if (metadata.magic != FC_CACHE_MAGIC)
- goto bail;
-
- if (!FcObjectRead(fd, metadata)) goto bail1;
- if (!FcStrSetRead(fd, metadata)) goto bail1;
- if (!FcCharSetRead(fd, metadata)) goto bail1;
- if (!FcMatrixRead(fd, metadata)) goto bail1;
- if (!FcLangSetRead(fd, metadata)) goto bail1;
- if (!FcValueListRead(fd, metadata)) goto bail1;
- if (!FcPatternEltRead(fd, metadata)) goto bail1;
- if (!FcPatternRead(fd, metadata)) goto bail1;
- if (!FcFontSetRead(fd, config, metadata)) goto bail1;
- close(fd);
- free (current_arch_machine_name);
- return FcTrue;
+ 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;
- bail1:
- for (i = FcSetSystem; i <= FcSetApplication; i++)
- config->fonts[i] = 0;
- close(fd);
- bail:
- free (current_arch_machine_name);
- return FcFalse;
-}
+ t = (t >> 3) & 0x3f; /* Bytes already in shsInfo->data */
-/* write serialized state to the cache file */
-FcBool
-FcCacheWrite (FcConfig * config)
-{
- int fd;
- FcCache metadata;
- off_t current_arch_start = 0, truncate_to;
- char * current_arch_machine_name, bytes_written[7] = "dedbef";
+ /* Handle any leading odd-sized chunks */
- if (!FcCachePrepareSerialize (config))
- return FcFalse;
+ if (t) {
+ unsigned char *p = (unsigned char *) ctx->in + t;
- if (!FcCacheSerialize (config))
- return FcFalse;
+ t = 64 - t;
+ if (len < t) {
+ memcpy(p, buf, len);
+ return;
+ }
+ memcpy(p, buf, t);
+ byteReverse(ctx->in, 16);
+ MD5Transform(ctx->buf, (FcChar32 *) ctx->in);
+ buf += t;
+ len -= t;
+ }
+ /* Process data in 64-byte chunks */
+
+ while (len >= 64) {
+ memcpy(ctx->in, buf, 64);
+ byteReverse(ctx->in, 16);
+ MD5Transform(ctx->buf, (FcChar32 *) ctx->in);
+ buf += 64;
+ len -= 64;
+ }
- fd = open(FcCacheFilename(), O_RDWR | O_CREAT, 0666);
- if (fd == -1)
- return FcFalse;
+ /* Handle any remaining bytes of data. */
- current_arch_machine_name = FcCacheGetCurrentArch();
- current_arch_start = FcCacheSkipToArch(fd, current_arch_machine_name);
- if (current_arch_start < 0)
- current_arch_start = FcCacheNextOffset (fd);
+ memcpy(ctx->in, buf, len);
+}
- if (!FcCacheMoveDown(fd, current_arch_start))
- goto bail;
+/*
+ * Final wrapup - pad to 64-byte boundary with the bit pattern
+ * 1 0* (64-bit count of bits processed, MSB-first)
+ */
+static void MD5Final(unsigned char digest[16], struct MD5Context *ctx)
+{
+ unsigned count;
+ unsigned char *p;
+
+ /* Compute number of bytes mod 64 */
+ count = (ctx->bits[0] >> 3) & 0x3F;
+
+ /* Set the first char of padding to 0x80. This is safe since there is
+ always at least one byte free */
+ p = ctx->in + count;
+ *p++ = 0x80;
+
+ /* Bytes of padding needed to make 64 bytes */
+ count = 64 - 1 - count;
+
+ /* Pad out to 56 mod 64 */
+ if (count < 8) {
+ /* Two lots of padding: Pad the first block to 64 bytes */
+ memset(p, 0, count);
+ byteReverse(ctx->in, 16);
+ MD5Transform(ctx->buf, (FcChar32 *) ctx->in);
+
+ /* Now fill the next block with 56 bytes */
+ memset(ctx->in, 0, 56);
+ } else {
+ /* Pad block to 56 bytes */
+ memset(p, 0, count - 8);
+ }
+ byteReverse(ctx->in, 14);
- current_arch_start = lseek(fd, 0, SEEK_CUR);
- if (ftruncate (fd, current_arch_start) == -1)
- goto bail;
+ /* Append length in bits and transform */
+ ((FcChar32 *) ctx->in)[14] = ctx->bits[0];
+ ((FcChar32 *) ctx->in)[15] = ctx->bits[1];
- /* reserve space for arch, count & metadata */
- if (!FcCacheWriteString (fd, current_arch_machine_name))
- goto bail;
- if (!FcCacheWriteString (fd, bytes_written))
- goto bail;
- memset (&metadata, 0, sizeof(FcCache));
- metadata.magic = FC_CACHE_MAGIC;
- write(fd, &metadata, sizeof(FcCache));
-
- if (!FcFontSetWrite(fd, config, &metadata)) goto bail;
- if (!FcPatternWrite(fd, &metadata)) goto bail;
- if (!FcPatternEltWrite(fd, &metadata)) goto bail;
- if (!FcValueListWrite(fd, &metadata)) goto bail;
- if (!FcLangSetWrite(fd, &metadata)) goto bail;
- if (!FcCharSetWrite(fd, &metadata)) goto bail;
- if (!FcMatrixWrite(fd, &metadata)) goto bail;
- if (!FcStrSetWrite(fd, &metadata)) goto bail;
- if (!FcObjectWrite(fd, &metadata)) goto bail;
-
- /* now write the address of the next offset */
- truncate_to = FcCacheNextOffset(fd) - current_arch_start;
- lseek(fd, current_arch_start + strlen(current_arch_machine_name)+1,
- SEEK_SET);
- strcpy (bytes_written, l64a(truncate_to));
- if (!FcCacheWriteString (fd, bytes_written))
- goto bail;
+ 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 */
+}
- /* now rewrite metadata & truncate file */
- if (write(fd, &metadata, sizeof(FcCache)) != sizeof (FcCache))
- goto bail;
- if (ftruncate (fd, current_arch_start + truncate_to) == -1)
- goto bail;
- close(fd);
- return FcTrue;
+/* The four core functions - F1 is optimized somewhat */
- bail:
- free (current_arch_machine_name);
- return FcFalse;
-}
+/* #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))
-/* if true, ignore the cache file */
-void
-FcCacheForce (FcBool f)
+/* 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<<s | 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])
{
- force = f;
+ 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;
}