* $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
*/
#include <fcntl.h>
+#include <dirent.h>
+#include <string.h>
#include <sys/mman.h>
#include <sys/utsname.h>
+#include <sys/types.h>
+#include <unistd.h>
#include "fcint.h"
+#include <unistd.h>
-#define PAGESIZE 8192
+#define ENDIAN_TEST 0x12345678
+#define MACHINE_SIGNATURE_SIZE 9 + 5*20 + 1
-static FcBool force;
+static int
+FcDirCacheOpen (const FcChar8 * dir);
-static FcChar8 *
-FcCacheReadString (int fd, FcChar8 *dest, int len)
+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);
+
+static FcBool
+FcCacheHaveBank (int bank);
+
+static void
+FcCacheAddBankDir (int bank, const char * dir);
+
+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 FC_DBG_CACHE_REF 1024
+
+static char *
+FcCacheReadString (int fd, char *dest, int len)
{
FcChar8 c;
FcBool escape;
int i;
if (len == 0)
- return FcFalse;
+ return 0;
size = len;
i = 0;
return 0;
}
-static FcBool
-FcCacheWriteString (int fd, const FcChar8 *chars)
-{
- if (write (fd, chars, strlen(chars)+1) != strlen(chars)+1)
- return FcFalse;
- return FcTrue;
-}
-
-#if 0
-/*
- * Verify the saved timestamp for a file
- */
-FcBool
-FcGlobalCacheCheckTime (const FcChar8 *file, FcGlobalCacheInfo *info)
+static void
+FcCacheSkipString (int fd)
{
- struct stat statb;
+ FcChar8 c;
+ FcBool escape;
- 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)
+ escape = FcFalse;
+ while (read (fd, &c, 1) == 1)
{
- if (FcDebug () & FC_DBG_CACHE)
- printf (" timestamp mismatch (was %d is %d)\n",
- (int) info->time, (int) statb.st_mtime);
- return FcFalse;
+ if (!escape)
+ {
+ switch (c) {
+ case '"':
+ c = '\0';
+ break;
+ case '\\':
+ escape = FcTrue;
+ continue;
+ }
+ }
+ if (c == '\0')
+ return;
+ escape = FcFalse;
}
- return FcTrue;
+ return;
}
-void
-FcGlobalCacheReferenced (FcGlobalCache *cache,
- FcGlobalCacheInfo *info)
+static FcBool
+FcCacheWriteString (int fd, const char *chars)
{
- if (!info->referenced)
- {
- info->referenced = FcTrue;
- cache->referenced++;
- if (FcDebug () & FC_DBG_CACHE_REF)
- printf ("Reference %d %s\n", cache->referenced, info->file);
- }
+ if (write (fd, chars, strlen(chars)+1) != strlen(chars)+1)
+ return FcFalse;
+ return FcTrue;
}
-/*
- * 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
- */
-
-typedef struct _FcFilePathInfo {
- const FcChar8 *dir;
- int dir_len;
- const FcChar8 *base;
- unsigned int base_hash;
-} FcFilePathInfo;
-
-static FcFilePathInfo
-FcFilePathInfoGet (const FcChar8 *path)
+static void
+FcGlobalCacheDirDestroy (FcGlobalCacheDir *d)
{
- 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;
- }
- i.base_hash = FcCacheHash (i.base, -1);
- return i;
+ FcStrSetDestroy (d->subdirs);
+ FcMemFree (FC_MEM_STRING, strlen (d->name)+1);
+ free (d->name);
+ FcMemFree (FC_MEM_CACHE, sizeof (FcGlobalCacheDir));
+ free (d);
}
FcGlobalCache *
FcGlobalCacheCreate (void)
{
FcGlobalCache *cache;
- int h;
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->dirs = 0;
cache->updated = FcFalse;
- cache->broken = FcFalse;
+ cache->fd = -1;
return cache;
}
FcGlobalCacheDestroy (FcGlobalCache *cache)
{
FcGlobalCacheDir *d, *next;
- int h;
- for (h = 0; h < FC_GLOBAL_CACHE_DIR_HASH_SIZE; h++)
+ for (d = cache->dirs; d; d = next)
{
- for (d = cache->ents[h]; d; d = next)
- {
- next = d->next;
- FcGlobalCacheDirDestroy (d);
- }
+ next = d->next;
+ FcGlobalCacheDirDestroy (d);
}
FcMemFree (FC_MEM_CACHE, sizeof (FcGlobalCache));
free (cache);
}
-/*
- * Cache file syntax is quite simple:
- *
- * "file_name" id time "font_name" \n
- */
-
void
FcGlobalCacheLoad (FcGlobalCache *cache,
- const FcChar8 *cache_file)
+ FcStrSet *staleDirs,
+ const FcChar8 *cache_file,
+ FcConfig *config)
{
- FILE *f;
- FcChar8 file_buf[8192], *file;
- int id;
- time_t time;
- FcChar8 name_buf[8192], *name;
- FcGlobalCacheInfo *info;
+ 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;
+
+ struct stat cache_stat, dir_stat;
+ char subdirName[FC_MAX_FILE_LEN + 1 + 12 + 1];
- f = fopen ((char *) cache_file, "r");
- if (!f)
+ if (stat ((char *) cache_file, &cache_stat) < 0)
+ return;
+
+ cache->fd = open ((char *) cache_file, O_RDONLY);
+ if (cache->fd == -1)
return;
cache->updated = FcFalse;
- 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 (!FcCacheReadString (cache->fd, name_buf, sizeof (name_buf)))
+ return;
+ if (strcmp (name_buf, FC_GLOBAL_MAGIC_COOKIE) != 0)
+ return;
+
+ current_arch_machine_name = FcCacheMachineSignature ();
+ current_arch_start = FcCacheSkipToArch(cache->fd,
+ current_arch_machine_name);
+ if (current_arch_start < 0)
+ goto bail_and_destroy;
+
+ lseek (cache->fd, current_arch_start, SEEK_SET);
+ if (!FcCacheReadString (cache->fd, candidate_arch_machine_name,
+ sizeof (candidate_arch_machine_name)))
+ goto bail_and_destroy;
+ if (strlen(candidate_arch_machine_name) == 0)
+ goto bail_and_destroy;
+
+ while (1)
{
- 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;
+ off_t targ;
+
+ if (!FcCacheReadString (cache->fd, name_buf, sizeof (name_buf)) || !strlen(name_buf))
+ break;
+
+ /* 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;
+
+ d->next = cache->dirs;
+ cache->dirs = d;
+
+ d->name = (char *)FcStrCopy ((FcChar8 *)name_buf);
+ d->ent = 0;
+ d->offset = lseek (cache->fd, 0, SEEK_CUR);
+
+ d->subdirs = FcStrSetCreate();
+ while (strlen(FcCacheReadString (cache->fd, subdirName, sizeof (subdirName))) > 0)
+ FcStrSetAdd (d->subdirs, (FcChar8 *)subdirName);
+
+ 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;
}
- if (file && file != file_buf)
- free (file);
- if (name && name != name_buf)
- free (name);
- fclose (f);
+ return;
+
+ bail1:
+ for (d = cache->dirs; d; d = next)
+ {
+ next = d->next;
+ free (d);
+ }
+ 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;
+
+}
+
+FcBool
+FcGlobalCacheReadDir (FcFontSet *set, FcStrSet *dirs, FcGlobalCache * cache, const char *dir, FcConfig *config)
+{
+ FcGlobalCacheDir *d;
+ FcBool ret = FcFalse;
+
+ if (cache->fd == -1)
+ return FcFalse;
+
+ if (!(dir = (char *)FcConfigNormalizeFontDir (config, (FcChar8 *)dir)))
+ return FcFalse; /* non-existing directory */
+
+ for (d = cache->dirs; d; d = d->next)
+ {
+ if (strncmp (d->name, dir, strlen(dir)) == 0)
+ {
+ lseek (cache->fd, d->offset, SEEK_SET);
+ if (!FcDirCacheConsume (cache->fd, d->name, set, config))
+ return FcFalse;
+ if (strcmp (d->name, dir) == 0)
+ ret = FcTrue;
+ }
+ }
+
+ return ret;
}
FcBool
FcGlobalCacheUpdate (FcGlobalCache *cache,
- const FcChar8 *file,
- int id,
- const FcChar8 *name)
+ FcStrSet *dirs,
+ const char *name,
+ FcFontSet *set,
+ FcConfig *config)
{
- const FcChar8 *match;
- struct stat statb;
- FcGlobalCacheInfo *info;
+ FcGlobalCacheDir *d;
+ int i;
- match = file;
+ name = (char *)FcConfigNormalizeFontDir (config, (FcChar8 *)name);
+ for (d = cache->dirs; d; d = d->next)
+ {
+ if (strcmp(d->name, name) == 0)
+ break;
+ }
- 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)
+ if (!d)
{
- FcGlobalCacheReferenced (cache, info);
- cache->updated = FcTrue;
+ d = malloc (sizeof (FcGlobalCacheDir));
+ if (!d)
+ return FcFalse;
+ d->next = cache->dirs;
+ cache->dirs = d;
}
- else
- cache->broken = FcTrue;
- return info != 0;
+
+ cache->updated = FcTrue;
+
+ d->name = (char *)FcStrCopy ((FcChar8 *)name);
+ d->ent = FcDirCacheProduce (set, &d->metadata);
+ d->offset = 0;
+ d->subdirs = FcStrSetCreate();
+ for (i = 0; i < dirs->num; i++)
+ FcStrSetAdd (d->subdirs, dirs->strs[i]);
+ return FcTrue;
}
FcBool
FcGlobalCacheSave (FcGlobalCache *cache,
- const FcChar8 *cache_file)
+ const FcChar8 *cache_file,
+ FcConfig *config)
{
- FILE *f;
- int dir_hash, file_hash;
+ int fd, fd_orig, i;
FcGlobalCacheDir *dir;
- FcGlobalCacheFile *file;
FcAtomic *atomic;
+ off_t current_arch_start = 0, truncate_to;
+ char * current_arch_machine_name, * header;
- if (!cache->updated && cache->referenced == cache->entries)
+ if (!cache->updated)
return FcTrue;
- if (cache->broken)
- return FcFalse;
-
#if defined (HAVE_GETUID) && defined (HAVE_GETEUID)
/* Set-UID programs can't safely update the cache */
if (getuid () != geteuid ())
atomic = FcAtomicCreate (cache_file);
if (!atomic)
- goto bail0;
+ return FcFalse;
+
if (!FcAtomicLock (atomic))
goto bail1;
- f = fopen ((char *) FcAtomicNewFile(atomic), "w");
- if (!f)
+ fd = open ((char *) FcAtomicNewFile(atomic), O_RDWR | O_CREAT,
+ S_IRUSR | S_IWUSR);
+ if (fd == -1)
goto bail2;
+ FcCacheWriteString (fd, FC_GLOBAL_MAGIC_COOKIE);
+
+ fd_orig = open ((char *) FcAtomicOrigFile(atomic), O_RDONLY);
+
+ current_arch_machine_name = FcCacheMachineSignature ();
+ if (fd_orig == -1)
+ current_arch_start = 0;
+ else
+ current_arch_start = FcCacheSkipToArch (fd_orig,
+ current_arch_machine_name);
- for (dir_hash = 0; dir_hash < FC_GLOBAL_CACHE_DIR_HASH_SIZE; dir_hash++)
+ if (current_arch_start < 0)
{
- 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;
- }
- }
- }
+ 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 (fclose (f) == EOF)
+ 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;
+
+ header = malloc (10 + strlen (current_arch_machine_name));
+ if (!header)
goto bail3;
+
+ truncate_to = current_arch_start + strlen(current_arch_machine_name) + 11;
+ for (dir = cache->dirs; dir; dir = dir->next)
+ {
+ truncate_to += strlen(dir->name) + 1;
+ truncate_to += sizeof (FcCache);
+ truncate_to = FcCacheNextOffset (truncate_to);
+ truncate_to += dir->metadata.count;
+
+ for (i = 0; i < dir->subdirs->size; i++)
+ truncate_to += strlen((char *)dir->subdirs->strs[i]) + 1;
+ truncate_to ++;
+ }
+ truncate_to -= current_arch_start;
+
+ sprintf (header, "%8x ", (int)truncate_to);
+ strcat (header, current_arch_machine_name);
+ if (!FcCacheWriteString (fd, header))
+ goto bail4;
+
+ for (dir = cache->dirs; dir; dir = dir->next)
+ {
+ if (dir->name)
+ {
+ const char * d = (const char *)FcConfigNormalizeFontDir (config, (const FcChar8 *)dir->name);
+
+ FcCacheWriteString (fd, d);
+
+ for (i = 0; i < dir->subdirs->size; i++)
+ FcCacheWriteString (fd, (char *)dir->subdirs->strs[i]);
+ FcCacheWriteString (fd, "");
+
+ write (fd, &dir->metadata, sizeof(FcCache));
+ lseek (fd, FcCacheNextOffset (lseek(fd, 0, SEEK_CUR)), SEEK_SET);
+ write (fd, dir->ent, dir->metadata.count);
+ free (dir->ent);
+ }
+ }
+ FcCacheWriteString (fd, "");
+
+ if (close (fd) == -1)
+ goto bail25;
if (!FcAtomicReplaceOrig (atomic))
- goto bail3;
+ goto bail25;
FcAtomicUnlock (atomic);
FcAtomicDestroy (atomic);
cache->updated = FcFalse;
return FcTrue;
-bail4:
- fclose (f);
-bail3:
+ bail4:
+ free (header);
+ bail3:
+ if (fd_orig != -1)
+ close (fd_orig);
+
+ close (fd);
+ bail25:
FcAtomicDeleteNew (atomic);
-bail2:
+ bail2:
FcAtomicUnlock (atomic);
-bail1:
+ bail1:
FcAtomicDestroy (atomic);
-bail0:
return FcFalse;
}
-#endif
/*
- * Find the next presumably-mmapable offset after the current file
- * pointer.
+ * Find the next presumably-mmapable offset after the supplied file
+ * position.
*/
-int
-FcCacheNextOffset(int fd)
+static int
+FcCacheNextOffset(off_t w)
{
- off_t w;
- w = lseek(fd, 0, SEEK_END);
-
- if (w % PAGESIZE == 0)
+ static long pagesize = -1;
+ if (pagesize == -1)
+ pagesize = sysconf(_SC_PAGESIZE);
+ if (w % pagesize == 0)
return w;
else
- return ((w / PAGESIZE)+1)*PAGESIZE;
-}
-
-/* will go away once we use config->cache */
-#define CACHE_DEFAULT_TMPDIR "/tmp"
-#define CACHE_DEFAULT_NAME "/fontconfig-mmap"
-static char *
-FcCacheFilename(void)
-{
- 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;
-}
-
-/*
- * Wipe out static state.
- */
-void
-FcCacheClearStatic()
-{
- FcFontSetClearStatic();
- FcPatternClearStatic();
- FcValueListClearStatic();
- FcObjectClearStatic();
- FcMatrixClearStatic();
- FcCharSetClearStatic();
- FcLangSetClearStatic();
-}
-
-/*
- * Trigger the counting phase: this tells us how much to allocate.
- */
-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)
-{
- int i;
- for (i = FcSetSystem; i <= FcSetApplication; i++)
- if (config->fonts[i] && !FcFontSetSerialize(config->fonts[i]))
- return FcFalse;
- return FcTrue;
-}
-
-/* get the current arch name */
-/* caller is responsible for freeing returned pointer */
-static char *
-FcCacheGetCurrentArch (void)
-{
- struct utsname b;
- char * current_arch_machine_name;
-
- if (uname(&b) == -1)
- 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;
+ return ((w / pagesize)+1)*pagesize;
}
/* return the address of the segment for the provided arch,
static off_t
FcCacheSkipToArch (int fd, const char * arch)
{
- char candidate_arch_machine_name[64], bytes_to_skip[7];
+ char candidate_arch_machine_name_count[MACHINE_SIGNATURE_SIZE + 9];
+ char * candidate_arch;
off_t current_arch_start = 0;
+ 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;
- 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 (lseek (fd, current_arch_start, SEEK_SET) != current_arch_start)
+ return -1;
- if (strcmp (candidate_arch_machine_name, arch)==0)
- break;
+ if (FcCacheReadString (fd, candidate_arch_machine_name_count,
+ sizeof (candidate_arch_machine_name_count)) == 0)
+ return -1;
+ if (!strlen(candidate_arch_machine_name_count))
+ return -1;
+ bs = strtol(candidate_arch_machine_name_count, &candidate_arch, 16);
+
+ // count = 0 should probably be distinguished from the !bs condition
+ if (!bs || bs < strlen (candidate_arch_machine_name_count))
+ return -1;
+
+ candidate_arch++; /* skip leading space */
+
+ if (strcmp (candidate_arch, arch)==0)
+ return current_arch_start;
current_arch_start += bs;
}
- if (strcmp (candidate_arch_machine_name, arch)!=0)
- return -1;
-
- return current_arch_start;
+ 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. */
-#define BUF_SIZE 8192
-
static FcBool
-FcCacheMoveDown (int fd, off_t start)
+FcCacheCopyOld (int fd, int fd_orig, off_t start)
{
- char * buf = malloc (BUF_SIZE);
- char candidate_arch_machine_name[64], bytes_to_skip[7];
- long bs; off_t pos;
+ char * buf = malloc (8192);
+ char candidate_arch_machine_name[MACHINE_SIGNATURE_SIZE + 9];
+ long bs;
int c, bytes_skipped;
+ off_t loc;
if (!buf)
return FcFalse;
+ loc = 0;
+ lseek (fd, 0, SEEK_SET); lseek (fd_orig, 0, SEEK_SET);
+ do
+ {
+ int b = 8192;
+ if (loc + b > start)
+ b = start - loc;
+
+ if ((c = read (fd_orig, buf, b)) <= 0)
+ break;
+ if (write (fd, buf, c) < 0)
+ goto bail;
+
+ loc += c;
+ }
+ while (c > 0);
+
lseek (fd, start, SEEK_SET);
if (FcCacheReadString (fd, candidate_arch_machine_name,
sizeof (candidate_arch_machine_name)) == 0)
goto done;
- if (FcCacheReadString (fd, bytes_to_skip, 7) == 0)
+ if (!strlen(candidate_arch_machine_name))
goto done;
- bs = a64l(bytes_to_skip);
+ bs = strtol(candidate_arch_machine_name, 0, 16);
if (bs == 0)
goto done;
do
{
lseek (fd, start+bs+bytes_skipped, SEEK_SET);
- if ((c = read (fd, buf, BUF_SIZE)) <= 0)
+ if ((c = read (fd, buf, 8192)) <= 0)
break;
lseek (fd, start+bytes_skipped, SEEK_SET);
if (write (fd, buf, c) < 0)
return FcFalse;
}
-/* read serialized state from the cache file */
+/* 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
-FcCacheRead (FcConfig *config)
+FcDirCacheValid (const FcChar8 *dir)
{
- 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;
-
- if (force)
- return FcFalse;
+ struct stat file_stat, dir_stat;
+ int fd;
- fd = open(FcCacheFilename(), O_RDONLY);
- if (fd == -1)
+ if (stat ((char *) dir, &dir_stat) < 0)
return FcFalse;
- current_arch_machine_name = FcCacheGetCurrentArch();
- current_arch_start = FcCacheSkipToArch(fd, current_arch_machine_name);
- if (current_arch_start < 0)
- goto bail;
+ fd = FcDirCacheOpen (dir);
- lseek (fd, current_arch_start, SEEK_SET);
- if (FcCacheReadString (fd, candidate_arch_machine_name,
- sizeof (candidate_arch_machine_name)) == 0)
+ if (fd < 0)
goto bail;
- if (FcCacheReadString (fd, bytes_in_block, 7) == 0)
+ if (fstat (fd, &file_stat) < 0)
goto bail;
- // sanity check for endianness issues
- read(fd, &metadata, sizeof(FcCache));
- if (metadata.magic != FC_CACHE_MAGIC)
- goto bail;
+ close (fd);
+
+ /*
+ * 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)
+ return FcFalse;
- 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;
- bail1:
- for (i = FcSetSystem; i <= FcSetApplication; i++)
- config->fonts[i] = 0;
- close(fd);
bail:
- free (current_arch_machine_name);
+ close (fd);
return FcFalse;
}
-/* write serialized state to the cache file */
+/* Assumes that the cache file in 'dir' exists.
+ * Checks that the cache has the appropriate arch section. */
FcBool
-FcCacheWrite (FcConfig * config)
+FcDirCacheHasCurrentArch (const FcChar8 *dir)
{
- int fd;
- FcCache metadata;
- off_t current_arch_start = 0, truncate_to;
- char * current_arch_machine_name, bytes_written[7] = "dedbef";
+ int fd;
+ off_t current_arch_start;
+ char *current_arch_machine_name;
- if (!FcCachePrepareSerialize (config))
- return FcFalse;
+ fd = FcDirCacheOpen (dir);
+ if (fd < 0)
+ goto bail;
- if (!FcCacheSerialize (config))
- return FcFalse;
+ current_arch_machine_name = FcCacheMachineSignature();
+ current_arch_start = FcCacheSkipToArch(fd, current_arch_machine_name);
+ close (fd);
- fd = open(FcCacheFilename(), O_RDWR | O_CREAT, 0666);
- if (fd == -1)
+ if (current_arch_start < 0)
return FcFalse;
+
+ return FcTrue;
- current_arch_machine_name = FcCacheGetCurrentArch();
- current_arch_start = FcCacheSkipToArch(fd, current_arch_machine_name);
- if (current_arch_start < 0)
- current_arch_start = FcCacheNextOffset (fd);
+ bail:
+ return FcFalse;
+}
- if (!FcCacheMoveDown(fd, current_arch_start))
- goto bail;
+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;
- current_arch_start = lseek(fd, 0, SEEK_CUR);
- if (ftruncate (fd, current_arch_start) == -1)
+ /* First remove normal cache file. */
+ if (stat ((char *) cache_file, &cache_stat) == 0 &&
+ unlink ((char *)cache_file) != 0)
goto bail;
- /* reserve space for arch, count & metadata */
- if (!FcCacheWriteString (fd, current_arch_machine_name))
+ /* Next remove any applicable hashed files. */
+ fd = -1; collisions = 0;
+ do
+ {
+ 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)
+ {
+ FcStrFree ((FcChar8 *)cache_file);
+ return FcTrue;
+ }
+
+ if (!FcCacheReadString (fd, name_buf, sizeof (name_buf)) || !strlen(name_buf))
+ {
+ FcStrFree ((FcChar8 *)cache_hashed);
+ goto bail;
+ }
+ } 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;
- if (!FcCacheWriteString (fd, bytes_written))
+ }
+
+ 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 (!FcConfigAcceptFilename (config, dir))
+ continue;
+
+ /* freed below */
+ file = (FcChar8 *) malloc (strlen ((char *) dir) + 1 + FC_MAX_FILE_LEN + 1);
+ if (!file)
+ return FcFalse;
+
+ strcpy ((char *) file, (char *) dir);
+ strcat ((char *) file, "/");
+ base = file + strlen ((char *) file);
+
+ subdirs = FcStrSetCreate ();
+ if (!subdirs)
+ {
+ fprintf (stderr, "Can't create directory set\n");
+ ret++;
+ free (file);
+ continue;
+ }
+
+ if (access ((char *) dir, X_OK) < 0)
+ {
+ switch (errno) {
+ case ENOENT:
+ case ENOTDIR:
+ case EACCES:
+ break;
+ default:
+ fprintf (stderr, "\"%s\": ", dir);
+ perror ("");
+ ret++;
+ }
+ FcStrSetDestroy (subdirs);
+ free (file);
+ continue;
+ }
+ if (stat ((char *) dir, &statb) == -1)
+ {
+ fprintf (stderr, "\"%s\": ", dir);
+ perror ("");
+ FcStrSetDestroy (subdirs);
+ ret++;
+ free (file);
+ continue;
+ }
+ if (!S_ISDIR (statb.st_mode))
+ {
+ fprintf (stderr, "\"%s\": not a directory, skipping\n", dir);
+ FcStrSetDestroy (subdirs);
+ free (file);
+ continue;
+ }
+ if (!FcDirCacheValid (dir) || !FcDirCacheRead (set, subdirs, dir, 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)
+ {
+ fprintf (stderr, "Can't create subdir list in \"%s\"\n", dir);
+ ret++;
+ free (file);
+ continue;
+ }
+ ret += FcCacheReadDirs (config, cache, sublist, set);
+ free (file);
+ }
+ FcStrListDone (list);
+ return ret;
+}
+
+FcFontSet *
+FcCacheRead (FcConfig *config, FcGlobalCache * cache)
+{
+ FcFontSet * s = FcFontSetCreate();
+ if (!s)
+ return 0;
+
+ if (FcCacheReadDirs (config, cache, FcConfigGetConfigDirs (config), s))
goto bail;
- 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))
+ return s;
+
+ bail:
+ FcFontSetDestroy (s);
+ return 0;
+}
+
+static const char bin2hex[] = { '0', '1', '2', '3',
+ '4', '5', '6', '7',
+ '8', '9', 'a', 'b',
+ 'c', 'd', 'e', 'f' };
+
+static char *
+FcDirCacheHashName (char * cache_file, int collisions)
+{
+ unsigned char hash[16], hex_hash[33];
+ char *cache_hashed;
+ unsigned char uscore = '_';
+ int cnt, i;
+ FcChar8 *tmp;
+ struct MD5Context ctx;
+
+ MD5Init (&ctx);
+ MD5Update (&ctx, (unsigned char *)cache_file, strlen (cache_file));
+
+ for (i = 0; i < collisions; i++)
+ MD5Update (&ctx, &uscore, 1);
+
+ MD5Final (hash, &ctx);
+
+ for (cnt = 0; cnt < 16; ++cnt)
+ {
+ hex_hash[2*cnt] = bin2hex[hash[cnt] >> 4];
+ hex_hash[2*cnt+1] = bin2hex[hash[cnt] & 0xf];
+ }
+ hex_hash[32] = 0;
+
+ tmp = FcStrPlus ((FcChar8 *)hex_hash, (FcChar8 *)FC_CACHE_SUFFIX);
+ if (!tmp)
+ return 0;
+
+ cache_hashed = (char *)FcStrPlus ((FcChar8 *)PKGCACHEDIR"/", tmp);
+ free (tmp);
+
+ return cache_hashed;
+}
+
+/* Opens the hashed name for cache_file.
+ * This would fail in the unlikely event of a collision and subsequent
+ * removal of the file which originally caused the collision. */
+static int
+FcDirCacheOpen (const FcChar8 *dir)
+{
+ 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;
+
+ if (stat ((char *)dir, &dir_stat) == -1)
+ return -1;
+
+ found = FcFalse;
+ do
+ {
+ struct stat c;
+ FcChar8 * name_buf_dir;
+
+ cache_hashed = FcDirCacheHashName (cache_file, collisions++);
+ if (!cache_hashed)
+ {
+ FcStrFree ((FcChar8 *)cache_file);
+ return -1;
+ }
+
+ if (fd > 0)
+ close (fd);
+ fd = open(cache_hashed, O_RDONLY);
+ FcStrFree ((FcChar8 *)cache_hashed);
+
+ if (fd == -1)
+ {
+ FcStrFree ((FcChar8 *)cache_file);
+ return -1;
+ }
+ if (!FcCacheReadString (fd, name_buf, sizeof (name_buf)) || !strlen(name_buf))
+ goto bail;
+
+ 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;
+
+ bail:
+ FcStrFree ((FcChar8 *)cache_file);
+ close (fd);
+ return -1;
+}
+
+/* read serialized state from the cache file */
+FcBool
+FcDirCacheRead (FcFontSet * set, FcStrSet * dirs, const FcChar8 *dir, FcConfig *config)
+{
+ 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];
+
+ fd = FcDirCacheOpen (dir);
+ if (fd < 0)
goto bail;
- /* now rewrite metadata & truncate file */
- if (write(fd, &metadata, sizeof(FcCache)) != sizeof (FcCache))
+ current_arch_machine_name = FcCacheMachineSignature();
+ current_arch_start = FcCacheSkipToArch(fd,
+ current_arch_machine_name);
+ if (current_arch_start < 0)
+ goto bail1;
+
+ lseek (fd, current_arch_start, SEEK_SET);
+ if (FcCacheReadString (fd, candidate_arch_machine_name,
+ sizeof (candidate_arch_machine_name)) == 0)
+ goto bail1;
+
+ while (FcCacheReadString (fd, subdirName, sizeof (subdirName)) && strlen (subdirName) > 0)
+ FcStrSetAdd (dirs, (FcChar8 *)subdirName);
+
+ if (!FcDirCacheConsume (fd, (const char *)dir, set, config))
+ goto bail1;
+
+ close(fd);
+ return FcTrue;
+
+ bail1:
+ close (fd);
+ bail:
+ return FcFalse;
+}
+
+static FcBool
+FcDirCacheConsume (int fd, const char * dir, FcFontSet *set, FcConfig *config)
+{
+ FcCache metadata;
+ void * current_dir_block;
+ off_t pos;
+
+ read(fd, &metadata, sizeof(FcCache));
+ if (metadata.magic != FC_CACHE_MAGIC)
+ return FcFalse;
+
+ if (!metadata.count)
+ {
+ pos = FcCacheNextOffset (lseek(fd, 0, SEEK_CUR));
+ lseek (fd, pos, SEEK_SET);
+ if (config)
+ FcConfigAddFontDir (config, (FcChar8 *)dir);
+ return FcTrue;
+ }
+
+ 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;
+
+ FcCacheAddBankDir (metadata.bank, dir);
+ if (config)
+ FcConfigAddFontDir (config, (FcChar8 *)dir);
+
+ if (!FcFontSetUnserialize (&metadata, set, current_dir_block))
+ return FcFalse;
+
+ return FcTrue;
+}
+
+static void *
+FcDirCacheProduce (FcFontSet *set, FcCache *metadata)
+{
+ void * current_dir_block, * final_dir_block;
+ static unsigned int rand_state = 0;
+ int bank, needed_bytes_no_align;
+
+ if (!rand_state)
+ rand_state = time(0L);
+ bank = rand_r(&rand_state);
+
+ while (FcCacheHaveBank(bank))
+ bank = rand_r(&rand_state);
+
+ memset (metadata, 0, sizeof(FcCache));
+ FcFontSetNewBank();
+ needed_bytes_no_align = FcFontSetNeededBytes (set);
+ metadata->count = needed_bytes_no_align +
+ FcFontSetNeededBytesAlign ();
+ metadata->magic = FC_CACHE_MAGIC;
+ metadata->bank = bank;
+
+ if (!needed_bytes_no_align) /* not a failure, no fonts to write */
+ {
+ /* no, you don't really need to write any bytes at all. */
+ metadata->count = 0;
+ return 0;
+ }
+
+ current_dir_block = malloc (metadata->count);
+ if (!current_dir_block)
goto bail;
- if (ftruncate (fd, current_arch_start + truncate_to) == -1)
+ // shut up valgrind
+ memset (current_dir_block, 0, metadata->count);
+ final_dir_block = FcFontSetDistributeBytes (metadata, current_dir_block);
+
+ if ((void *)((char *)current_dir_block+metadata->count) < final_dir_block)
+ goto bail;
+
+ if (!FcFontSetSerialize (bank, set))
goto bail;
+ return current_dir_block;
+
+ bail:
+ free (current_dir_block);
+ return 0;
+}
+
+/* write serialized state to the cache file */
+FcBool
+FcDirCacheWrite (FcFontSet *set, FcStrSet *dirs, const FcChar8 *dir)
+{
+ char *cache_file;
+ char *cache_hashed;
+ int fd, fd_orig, i, dirs_count;
+ FcAtomic *atomic;
+ FcCache metadata;
+ off_t current_arch_start = 0, truncate_to;
+ char name_buf[FC_MAX_FILE_LEN];
+ int collisions;
+
+ char *current_arch_machine_name, * header;
+ void *current_dir_block = 0;
+
+ dir = FcConfigNormalizeFontDir (FcConfigGetCurrent(), dir);
+ if (!dir)
+ 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;
+ if(!FcCacheReadString (fd, name_buf, sizeof (name_buf)) || !strlen(name_buf))
+ {
+ close (fd);
+ break;
+ }
+ close (fd);
+
+ if (strcmp (name_buf, cache_file) != 0)
+ continue;
+ } while (0);
+
+ current_dir_block = FcDirCacheProduce (set, &metadata);
+
+ if (metadata.count && !current_dir_block)
+ goto bail1;
+
+ if (FcDebug () & FC_DBG_CACHE)
+ printf ("FcDirCacheWriteDir cache_file \"%s\"\n", cache_file);
+
+ 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))
+ goto bail4;
+
+ if (fd_orig != -1)
+ close (fd_orig);
+
+ current_arch_start = lseek(fd, 0, SEEK_CUR);
+ if (ftruncate (fd, current_arch_start) == -1)
+ goto bail4;
+
+ /* allocate space for subdir names in this block */
+ dirs_count = 0;
+ for (i = 0; i < dirs->size; i++)
+ dirs_count += strlen((char *)dirs->strs[i]) + 1;
+ dirs_count ++;
+
+ /* now write the address of the next offset */
+ truncate_to = FcCacheNextOffset (FcCacheNextOffset (current_arch_start + sizeof (FcCache) + dirs_count) + metadata.count) - current_arch_start;
+ header = malloc (10 + strlen (current_arch_machine_name));
+ if (!header)
+ goto bail4;
+ sprintf (header, "%8x ", (int)truncate_to);
+ strcat (header, current_arch_machine_name);
+ if (!FcCacheWriteString (fd, header))
+ goto bail5;
+
+ for (i = 0; i < dirs->size; i++)
+ FcCacheWriteString (fd, (char *)dirs->strs[i]);
+ FcCacheWriteString (fd, "");
+
+ write (fd, &metadata, sizeof(FcCache));
+ if (metadata.count)
+ {
+ lseek (fd, FcCacheNextOffset (lseek(fd, 0, SEEK_END)), SEEK_SET);
+ write (fd, current_dir_block, metadata.count);
+ free (current_dir_block);
+ }
+
+ /* this actually serves to pad out the cache file, if needed */
+ if (ftruncate (fd, current_arch_start + truncate_to) == -1)
+ goto bail5;
+
+ free (header);
close(fd);
+ if (!FcAtomicReplaceOrig(atomic))
+ goto bail5;
+ FcStrFree ((FcChar8 *)cache_hashed);
+ FcStrFree ((FcChar8 *)cache_file);
+ FcAtomicUnlock (atomic);
+ FcAtomicDestroy (atomic);
return FcTrue;
+ bail5:
+ free (header);
+ bail4:
+ close (fd);
+ bail3:
+ FcAtomicUnlock (atomic);
+ bail2:
+ 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:
- free (current_arch_machine_name);
return FcFalse;
}
-/* if true, ignore the cache file */
-void
-FcCacheForce (FcBool f)
+static char *
+FcCacheMachineSignature ()
+{
+ static char buf[MACHINE_SIGNATURE_SIZE];
+ int32_t magic = ENDIAN_TEST;
+ char * m = (char *)&magic;
+
+ sprintf (buf, "%2x%2x%2x%2x "
+ "%4x %4x %4x %4x %4x %4x %4x %4x %4x %4x %4x %4x "
+ "%4x %4x %4x %4x %4x %4x %4x %4x\n",
+ m[0], m[1], m[2], m[3],
+ (unsigned int)sizeof (char),
+ (unsigned int)sizeof (char *),
+ (unsigned int)sizeof (int),
+ (unsigned int)sizeof (FcPattern),
+ (unsigned int)sizeof (FcPatternEltPtr),
+ (unsigned int)sizeof (struct _FcPatternElt *),
+ (unsigned int)sizeof (FcPatternElt),
+ (unsigned int)sizeof (FcObjectPtr),
+ (unsigned int)sizeof (FcValueListPtr),
+ (unsigned int)sizeof (FcValue),
+ (unsigned int)sizeof (FcValueBinding),
+ (unsigned int)sizeof (struct _FcValueList *),
+ (unsigned int)sizeof (FcCharSet),
+ (unsigned int)sizeof (FcCharLeaf **),
+ (unsigned int)sizeof (FcChar16 *),
+ (unsigned int)sizeof (FcChar16),
+ (unsigned int)sizeof (FcCharLeaf),
+ (unsigned int)sizeof (FcChar32),
+ (unsigned int)sizeof (FcCache),
+ (unsigned int)sysconf(_SC_PAGESIZE));
+
+ return buf;
+}
+
+static int banks_ptr = 0, banks_alloc = 0;
+int * _fcBankId = 0, * _fcBankIdx = 0;
+static const char ** bankDirs = 0;
+
+static FcBool
+FcCacheHaveBank (int bank)
+{
+ int i;
+
+ if (bank < FC_BANK_FIRST)
+ return FcTrue;
+
+ for (i = 0; i < banks_ptr; i++)
+ if (_fcBankId[i] == bank)
+ return FcTrue;
+
+ return FcFalse;
+}
+
+int
+FcCacheBankToIndexMTF (int bank)
+{
+ int i, j;
+
+ for (i = 0; i < banks_ptr; i++)
+ if (_fcBankId[_fcBankIdx[i]] == bank)
+ {
+ int t = _fcBankIdx[i];
+
+ for (j = i; j > 0; j--)
+ _fcBankIdx[j] = _fcBankIdx[j-1];
+ _fcBankIdx[0] = t;
+ return t;
+ }
+
+ if (banks_ptr >= banks_alloc)
+ {
+ int * b, * bidx;
+ const char ** bds;
+
+ b = realloc (_fcBankId, (banks_alloc + 4) * sizeof(int));
+ if (!b)
+ return -1;
+ _fcBankId = b;
+
+ bidx = realloc (_fcBankIdx, (banks_alloc + 4) * sizeof(int));
+ if (!bidx)
+ return -1;
+ _fcBankIdx = bidx;
+
+ bds = realloc (bankDirs, (banks_alloc + 4) * sizeof (char *));
+ if (!bds)
+ return -1;
+ bankDirs = bds;
+
+ banks_alloc += 4;
+ }
+
+ i = banks_ptr++;
+ _fcBankId[i] = bank;
+ _fcBankIdx[i] = i;
+ return i;
+}
+
+static void
+FcCacheAddBankDir (int bank, const char * dir)
+{
+ int bi = FcCacheBankToIndexMTF (bank);
+
+ if (bi < 0)
+ return;
+
+ bankDirs[bi] = (const char *)FcStrCopy ((FcChar8 *)dir);
+}
+
+const char *
+FcCacheFindBankDir (int bank)
+{
+ int bi = FcCacheBankToIndex (bank);
+ return bankDirs[bi];
+}
+
+/*
+ * This code implements the MD5 message-digest algorithm.
+ * The algorithm is due to Ron Rivest. This code was
+ * written by Colin Plumb in 1993, no copyright is claimed.
+ * This code is in the public domain; do with it what you wish.
+ *
+ * Equivalent code is available from RSA Data Security, Inc.
+ * This code has been tested against that, and is equivalent,
+ * except that you don't need to include two pages of legalese
+ * with every copy.
+ *
+ * To compute the message digest of a chunk of bytes, declare an
+ * MD5Context structure, pass it to MD5Init, call MD5Update as
+ * needed on buffers full of bytes, and then call MD5Final, which
+ * will fill a supplied 16-byte array with the digest.
+ */
+
+#ifndef HIGHFIRST
+#define byteReverse(buf, len) /* Nothing */
+#else
+/*
+ * Note: this code is harmless on little-endian machines.
+ */
+void byteReverse(unsigned char *buf, unsigned longs)
+{
+ FcChar32 t;
+ do {
+ t = (FcChar32) ((unsigned) buf[3] << 8 | buf[2]) << 16 |
+ ((unsigned) buf[1] << 8 | buf[0]);
+ *(FcChar32 *) buf = t;
+ buf += 4;
+ } while (--longs);
+}
+#endif
+
+/*
+ * Start MD5 accumulation. Set bit count to 0 and buffer to mysterious
+ * initialization constants.
+ */
+static void MD5Init(struct MD5Context *ctx)
+{
+ ctx->buf[0] = 0x67452301;
+ ctx->buf[1] = 0xefcdab89;
+ ctx->buf[2] = 0x98badcfe;
+ ctx->buf[3] = 0x10325476;
+
+ ctx->bits[0] = 0;
+ ctx->bits[1] = 0;
+}
+
+/*
+ * Update context to reflect the concatenation of another buffer full
+ * of bytes.
+ */
+static void MD5Update(struct MD5Context *ctx, unsigned char *buf, unsigned len)
+{
+ FcChar32 t;
+
+ /* Update bitcount */
+
+ t = ctx->bits[0];
+ if ((ctx->bits[0] = t + ((FcChar32) len << 3)) < t)
+ ctx->bits[1]++; /* Carry from low to high */
+ ctx->bits[1] += len >> 29;
+
+ t = (t >> 3) & 0x3f; /* Bytes already in shsInfo->data */
+
+ /* Handle any leading odd-sized chunks */
+
+ if (t) {
+ unsigned char *p = (unsigned char *) ctx->in + t;
+
+ t = 64 - t;
+ if (len < t) {
+ memcpy(p, buf, len);
+ return;
+ }
+ memcpy(p, buf, t);
+ byteReverse(ctx->in, 16);
+ MD5Transform(ctx->buf, (FcChar32 *) ctx->in);
+ buf += t;
+ len -= t;
+ }
+ /* Process data in 64-byte chunks */
+
+ while (len >= 64) {
+ memcpy(ctx->in, buf, 64);
+ byteReverse(ctx->in, 16);
+ MD5Transform(ctx->buf, (FcChar32 *) ctx->in);
+ buf += 64;
+ len -= 64;
+ }
+
+ /* Handle any remaining bytes of data. */
+
+ memcpy(ctx->in, buf, len);
+}
+
+/*
+ * Final wrapup - pad to 64-byte boundary with the bit pattern
+ * 1 0* (64-bit count of bits processed, MSB-first)
+ */
+static void MD5Final(unsigned char digest[16], struct MD5Context *ctx)
+{
+ unsigned count;
+ unsigned char *p;
+
+ /* Compute number of bytes mod 64 */
+ count = (ctx->bits[0] >> 3) & 0x3F;
+
+ /* Set the first char of padding to 0x80. This is safe since there is
+ always at least one byte free */
+ p = ctx->in + count;
+ *p++ = 0x80;
+
+ /* Bytes of padding needed to make 64 bytes */
+ count = 64 - 1 - count;
+
+ /* Pad out to 56 mod 64 */
+ if (count < 8) {
+ /* Two lots of padding: Pad the first block to 64 bytes */
+ memset(p, 0, count);
+ byteReverse(ctx->in, 16);
+ MD5Transform(ctx->buf, (FcChar32 *) ctx->in);
+
+ /* Now fill the next block with 56 bytes */
+ memset(ctx->in, 0, 56);
+ } else {
+ /* Pad block to 56 bytes */
+ memset(p, 0, count - 8);
+ }
+ byteReverse(ctx->in, 14);
+
+ /* Append length in bits and transform */
+ ((FcChar32 *) ctx->in)[14] = ctx->bits[0];
+ ((FcChar32 *) ctx->in)[15] = ctx->bits[1];
+
+ MD5Transform(ctx->buf, (FcChar32 *) ctx->in);
+ byteReverse((unsigned char *) ctx->buf, 4);
+ memcpy(digest, ctx->buf, 16);
+ memset(ctx, 0, sizeof(ctx)); /* In case it's sensitive */
+}
+
+
+/* The four core functions - F1 is optimized somewhat */
+
+/* #define F1(x, y, z) (x & y | ~x & z) */
+#define F1(x, y, z) (z ^ (x & (y ^ z)))
+#define F2(x, y, z) F1(z, x, y)
+#define F3(x, y, z) (x ^ y ^ z)
+#define F4(x, y, z) (y ^ (x | ~z))
+
+/* This is the central step in the MD5 algorithm. */
+#define MD5STEP(f, w, x, y, z, data, s) \
+ ( w += f(x, y, z) + data, w = w<<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;
}