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fontconfig/src/fccache.c

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/*
* $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
* 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
* advertising or publicity pertaining to distribution of the software without
* specific, written prior permission. Keith Packard makes 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,
* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
* EVENT SHALL KEITH PACKARD BE LIABLE FOR ANY SPECIAL, INDIRECT OR
* CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
* DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
* TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
* PERFORMANCE OF THIS SOFTWARE.
*/
#include <fcntl.h>
#include <dirent.h>
#include <sys/mman.h>
#include <sys/utsname.h>
#include <sys/types.h>
#include <unistd.h>
#include "fcint.h"
#define ENDIAN_TEST 0x12345678
#define MACHINE_SIGNATURE_SIZE 9 + 5*19 + 1
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);
FcBool
FcDirCacheRead (FcFontSet * set, FcStrSet * dirs, const FcChar8 *dir);
static int
FcCacheNextOffset(off_t w);
static char *
FcCacheMachineSignature (void);
static FcBool
FcCacheHaveBank (int bank);
static void
FcCacheAddBankDir (int bank, const char * dir);
#define FC_DBG_CACHE_REF 1024
static char *
FcCacheReadString (int fd, char *dest, int len)
{
FcChar8 c;
FcBool escape;
int size;
int i;
if (len == 0)
return 0;
size = len;
i = 0;
escape = FcFalse;
while (read (fd, &c, 1) == 1)
{
if (!escape)
{
switch (c) {
case '"':
c = '\0';
break;
case '\\':
escape = FcTrue;
continue;
}
}
if (i == size)
{
dest[i++] = 0;
return dest;
}
dest[i++] = c;
if (c == '\0')
return dest;
escape = FcFalse;
}
return 0;
}
static FcBool
FcCacheWriteString (int fd, const char *chars)
{
if (write (fd, chars, strlen(chars)+1) != strlen(chars)+1)
return FcFalse;
return FcTrue;
}
static void
FcGlobalCacheDirDestroy (FcGlobalCacheDir *d)
{
FcMemFree (FC_MEM_STRING, strlen (d->name)+1);
free (d->name);
FcMemFree (FC_MEM_CACHE, sizeof (FcGlobalCacheDir));
free (d);
}
FcGlobalCache *
FcGlobalCacheCreate (void)
{
FcGlobalCache *cache;
cache = malloc (sizeof (FcGlobalCache));
if (!cache)
return 0;
FcMemAlloc (FC_MEM_CACHE, sizeof (FcGlobalCache));
cache->dirs = 0;
cache->updated = FcFalse;
cache->fd = -1;
return cache;
}
void
FcGlobalCacheDestroy (FcGlobalCache *cache)
{
FcGlobalCacheDir *d, *next;
for (d = cache->dirs; d; d = next)
{
next = d->next;
FcGlobalCacheDirDestroy (d);
}
FcMemFree (FC_MEM_CACHE, sizeof (FcGlobalCache));
free (cache);
}
void
FcGlobalCacheLoad (FcGlobalCache *cache,
FcStrSet *staleDirs,
const FcChar8 *cache_file,
FcConfig *config)
{
char name_buf[8192];
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;
if (stat ((char *) cache_file, &cache_stat) < 0)
return;
cache->fd = open ((char *) cache_file, O_RDONLY);
if (cache->fd == -1)
return;
cache->updated = FcFalse;
current_arch_machine_name = FcCacheMachineSignature ();
current_arch_start = FcCacheSkipToArch(cache->fd,
current_arch_machine_name);
if (current_arch_start < 0)
goto bail_and_destroy;
lseek (cache->fd, current_arch_start, SEEK_SET);
FcCacheReadString (cache->fd, candidate_arch_machine_name,
sizeof (candidate_arch_machine_name));
if (strlen(candidate_arch_machine_name) == 0)
goto bail_and_destroy;
while (1)
{
off_t targ;
FcCacheReadString (cache->fd, name_buf, sizeof (name_buf));
if (!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);
if (read (cache->fd, &d->metadata, sizeof (FcCache)) != sizeof (FcCache))
goto bail1;
targ = FcCacheNextOffset (lseek(cache->fd, 0, SEEK_CUR)) + d->metadata.count;
if (lseek (cache->fd, targ, SEEK_SET) != targ)
goto bail1;
}
return;
bail1:
for (d = cache->dirs; d; d = next)
{
next = d->next;
free (d);
}
cache->dirs = 0;
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;
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, dir, set))
return FcFalse;
if (strcmp (d->name, dir) == 0)
ret = FcTrue;
}
}
return ret;
}
FcBool
FcGlobalCacheUpdate (FcGlobalCache *cache,
const char *name,
FcFontSet *set)
{
FcGlobalCacheDir * d;
if (!set->nfont)
return FcTrue;
for (d = cache->dirs; d; d = d->next)
{
if (strcmp(d->name, name) == 0)
break;
}
if (!d)
{
d = malloc (sizeof (FcGlobalCacheDir));
if (!d)
return FcFalse;
d->next = cache->dirs;
cache->dirs = d;
}
cache->updated = FcTrue;
d->name = (char *)FcStrCopy ((FcChar8 *)name);
d->ent = FcDirCacheProduce (set, &d->metadata);
d->offset = 0;
return FcTrue;
}
FcBool
FcGlobalCacheSave (FcGlobalCache *cache,
const FcChar8 *cache_file)
{
int fd, fd_orig;
FcGlobalCacheDir *dir;
FcAtomic *atomic;
off_t current_arch_start = 0, truncate_to;
char * current_arch_machine_name, * header;
if (!cache->updated)
return FcTrue;
#if defined (HAVE_GETUID) && defined (HAVE_GETEUID)
/* Set-UID programs can't safely update the cache */
if (getuid () != geteuid ())
return FcFalse;
#endif
atomic = FcAtomicCreate (cache_file);
if (!atomic)
return FcFalse;
if (!FcAtomicLock (atomic))
goto bail1;
fd = open ((char *) FcAtomicNewFile(atomic), O_RDWR | O_CREAT,
S_IRUSR | S_IWUSR);
if (fd == -1)
goto bail2;
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);
if (current_arch_start < 0)
current_arch_start = FcCacheNextOffset (lseek(fd_orig, 0, SEEK_END));
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 (current_arch_start + truncate_to);
truncate_to += dir->metadata.count;
}
truncate_to -= current_arch_start;
sprintf (header, "%8x ", (int)truncate_to);
strcat (header, current_arch_machine_name);
if (!FcCacheWriteString (fd, header))
goto bail4;
for (dir = cache->dirs; dir; dir = dir->next)
{
if (dir->ent)
{
FcCacheWriteString (fd, dir->name);
write (fd, &dir->metadata, sizeof(FcCache));
lseek (fd, FcCacheNextOffset (lseek(fd, 0, SEEK_CUR)), SEEK_SET);
write (fd, dir->ent, dir->metadata.count);
free (dir->ent);
}
}
FcCacheWriteString (fd, "");
if (close (fd) == -1)
goto bail25;
if (!FcAtomicReplaceOrig (atomic))
goto bail25;
FcAtomicUnlock (atomic);
FcAtomicDestroy (atomic);
cache->updated = FcFalse;
return FcTrue;
bail4:
free (header);
bail3:
if (fd_orig != -1)
close (fd_orig);
close (fd);
bail25:
FcAtomicDeleteNew (atomic);
bail2:
FcAtomicUnlock (atomic);
bail1:
FcAtomicDestroy (atomic);
return FcFalse;
}
#define PAGESIZE 8192
/*
* Find the next presumably-mmapable offset after the supplied file
* position.
*/
static int
FcCacheNextOffset(off_t w)
{
if (w % PAGESIZE == 0)
return w;
else
return ((w / PAGESIZE)+1)*PAGESIZE;
}
/* return the address of the segment for the provided arch,
* or -1 if arch not found */
static off_t
FcCacheSkipToArch (int fd, const char * arch)
{
char candidate_arch_machine_name_count[MACHINE_SIGNATURE_SIZE + 9];
char * candidate_arch;
off_t current_arch_start = 0;
/* skip arches that are not the current arch */
while (1)
{
long bs;
if (lseek (fd, current_arch_start, SEEK_SET) != current_arch_start)
return -1;
if (FcCacheReadString (fd, candidate_arch_machine_name_count,
sizeof (candidate_arch_machine_name_count)) == 0)
return -1;
if (!strlen(candidate_arch_machine_name_count))
return -1;
bs = strtol(candidate_arch_machine_name_count, &candidate_arch, 16);
// 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;
}
return -1;
}
/* Cuts out the segment at the file pointer (moves everything else
* down to cover it), and leaves the file pointer at the end of the
* file. */
static FcBool
FcCacheCopyOld (int fd, int fd_orig, off_t start)
{
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 (!strlen(candidate_arch_machine_name))
goto done;
bs = strtol(candidate_arch_machine_name, 0, 16);
if (bs == 0)
goto done;
bytes_skipped = 0;
do
{
lseek (fd, start+bs+bytes_skipped, SEEK_SET);
if ((c = read (fd, buf, 8192)) <= 0)
break;
lseek (fd, start+bytes_skipped, SEEK_SET);
if (write (fd, buf, c) < 0)
goto bail;
bytes_skipped += c;
}
while (c > 0);
lseek (fd, start+bytes_skipped, SEEK_SET);
done:
free (buf);
return FcTrue;
bail:
free (buf);
return FcFalse;
}
/* Does not check that the cache has the appropriate arch section. */
FcBool
FcDirCacheValid (const FcChar8 *dir)
{
FcChar8 *cache_file = FcStrPlus (dir, (FcChar8 *) "/" FC_DIR_CACHE_FILE);
struct stat file_stat, dir_stat;
if (stat ((char *) dir, &dir_stat) < 0)
{
FcStrFree (cache_file);
return FcFalse;
}
if (stat ((char *) cache_file, &file_stat) < 0)
{
FcStrFree (cache_file);
return FcFalse;
}
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)
return FcFalse;
return FcTrue;
}
/* Assumes that the cache file in 'dir' exists.
* Checks that the cache has the appropriate arch section. */
FcBool
FcDirCacheHasCurrentArch (const FcChar8 *dir)
{
FcChar8 *cache_file = FcStrPlus (dir, (FcChar8 *) "/" FC_DIR_CACHE_FILE);
int fd;
off_t current_arch_start;
char *current_arch_machine_name;
current_arch_machine_name = FcCacheMachineSignature();
fd = open ((char *)cache_file, O_RDONLY);
if (fd == -1)
return FcFalse;
current_arch_start = FcCacheSkipToArch(fd, current_arch_machine_name);
close (fd);
if (current_arch_start < 0)
return FcFalse;
return FcTrue;
}
FcBool
FcDirCacheUnlink (const FcChar8 *dir)
{
FcChar8 *cache_file = FcStrPlus (dir, (FcChar8 *) "/" FC_DIR_CACHE_FILE);
struct stat cache_stat;
if (stat ((char *) cache_file, &cache_stat) == 0 &&
unlink ((char *)cache_file) != 0)
{
FcStrFree (cache_file);
return FcFalse;
}
FcStrFree (cache_file);
return FcTrue;
}
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)))
{
/* 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))
{
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;
return s;
bail:
FcFontSetDestroy (s);
return 0;
}
/* read serialized state from the cache file */
FcBool
FcDirCacheRead (FcFontSet * set, FcStrSet * dirs, const FcChar8 *dir)
{
char *cache_file = (char *)FcStrPlus (dir, (FcChar8 *) "/" FC_DIR_CACHE_FILE);
int fd;
char * current_arch_machine_name;
char candidate_arch_machine_name[9+MACHINE_SIGNATURE_SIZE];
off_t current_arch_start = 0;
char subdirName[FC_MAX_FILE_LEN + 1 + 12 + 1];
if (!cache_file)
goto bail;
current_arch_machine_name = FcCacheMachineSignature();
fd = open(cache_file, O_RDONLY);
if (fd == -1)
goto bail;
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 (strlen(FcCacheReadString (fd, subdirName, sizeof (subdirName))) > 0)
FcStrSetAdd (dirs, (FcChar8 *)subdirName);
if (!FcDirCacheConsume (fd, (const char *)dir, set))
goto bail1;
close(fd);
free (cache_file);
return FcTrue;
bail1:
close (fd);
bail:
free (cache_file);
return FcFalse;
}
static FcBool
FcDirCacheConsume (int fd, const char * dir, FcFontSet *set)
{
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)
return FcTrue;
pos = FcCacheNextOffset (lseek(fd, 0, SEEK_CUR));
current_dir_block = mmap (0, metadata.count,
PROT_READ, MAP_SHARED, fd, pos);
if (current_dir_block == MAP_FAILED)
return FcFalse;
if (!FcFontSetUnserialize (metadata, set, current_dir_block))
return FcFalse;
FcCacheAddBankDir (metadata.bank, dir);
return FcTrue;
}
static void *
FcDirCacheProduce (FcFontSet *set, FcCache *metadata)
{
void * current_dir_block, * final_dir_block;
static unsigned int rand_state = 0;
int bank;
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();
metadata->count = FcFontSetNeededBytes (set);
metadata->magic = FC_CACHE_MAGIC;
metadata->bank = bank;
if (!metadata->count) /* not a failure, no fonts to write */
return 0;
current_dir_block = malloc (metadata->count);
if (!current_dir_block)
goto bail;
final_dir_block = FcFontSetDistributeBytes (metadata, current_dir_block);
if ((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)
{
FcChar8 *cache_file = FcStrPlus (dir, (FcChar8 *) "/" FC_DIR_CACHE_FILE);
int fd, fd_orig, i, dirs_count;
FcAtomic *atomic;
FcCache metadata;
off_t current_arch_start = 0, truncate_to;
char *current_arch_machine_name, * header;
void *current_dir_block;
if (!cache_file)
goto bail;
current_dir_block = FcDirCacheProduce (set, &metadata);
if (metadata.count && !current_dir_block)
goto bail0;
if (FcDebug () & FC_DBG_CACHE)
printf ("FcDirCacheWriteDir cache_file \"%s\"\n", cache_file);
atomic = FcAtomicCreate (cache_file);
if (!atomic)
goto bail0;
if (!FcAtomicLock (atomic))
goto bail1;
fd_orig = open((char *)FcAtomicOrigFile (atomic), O_RDONLY, 0666);
fd = open((char *)FcAtomicNewFile (atomic), O_RDWR | O_CREAT, 0666);
if (fd == -1)
goto bail2;
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)
current_arch_start = FcCacheNextOffset (lseek(fd_orig, 0, SEEK_END));
if (fd_orig != -1 && !FcCacheCopyOld(fd, fd_orig, current_arch_start))
goto bail3;
if (fd_orig != -1)
close (fd_orig);
current_arch_start = lseek(fd, 0, SEEK_CUR);
if (ftruncate (fd, current_arch_start) == -1)
goto bail3;
/* 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 bail3;
sprintf (header, "%8x ", (int)truncate_to);
strcat (header, current_arch_machine_name);
if (!FcCacheWriteString (fd, header))
goto bail4;
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 bail4;
close(fd);
if (!FcAtomicReplaceOrig(atomic))
goto bail4;
FcAtomicUnlock (atomic);
FcAtomicDestroy (atomic);
return FcTrue;
bail4:
free (header);
bail3:
close (fd);
bail2:
FcAtomicUnlock (atomic);
bail1:
FcAtomicDestroy (atomic);
bail0:
unlink ((char *)cache_file);
free (cache_file);
if (current_dir_block)
free (current_dir_block);
bail:
return FcFalse;
}
static char *
FcCacheMachineSignature ()
{
static char buf[MACHINE_SIGNATURE_SIZE];
int magic = ENDIAN_TEST;
char * m = (char *)&magic;
sprintf (buf, "%2x%2x%2x%2x "
"%4x %4x %4x %4x %4x %4x %4x %4x %4x %4x %4x %4x "
"%4x %4x %4x %4x %4x %4x %4x\n",
m[0], m[1], m[2], m[3],
(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));
return buf;
}
static int banks_ptr = 0, banks_alloc = 0;
static int * bankId = 0, * bankIdx = 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 (bankId[i] == bank)
return FcTrue;
return FcFalse;
}
int
FcCacheBankToIndex (int bank)
{
int i, j;
for (i = 0; i < banks_ptr; i++)
if (bankId[bankIdx[i]] == bank)
{
int t = bankIdx[i];
for (j = i; j > 0; j--)
bankIdx[j] = bankIdx[j-1];
bankIdx[0] = t;
return t;
}
if (banks_ptr >= banks_alloc)
{
int * b, * bidx;
const char ** bds;
b = realloc (bankId, (banks_alloc + 4) * sizeof(int));
if (!b)
return -1;
bankId = b;
bidx = realloc (bankIdx, (banks_alloc + 4) * sizeof(int));
if (!bidx)
return -1;
bankIdx = bidx;
bds = realloc (bankDirs, (banks_alloc + 4) * sizeof (char *));
if (!bds)
return -1;
bankDirs = bds;
banks_alloc += 4;
}
i = banks_ptr++;
bankId[i] = bank;
bankIdx[i] = i;
return i;
}
static void
FcCacheAddBankDir (int bank, const char * dir)
{
int bi = FcCacheBankToIndex (bank);
if (bi < 0)
return;
bankDirs[bi] = (const char *)FcStrCopy ((FcChar8 *)dir);
}
const char *
FcCacheFindBankDir (int bank)
{
int bi = FcCacheBankToIndex (bank);
return bankDirs[bi];
}
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