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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
*
* 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 "fcint.h"
#define ENDIAN_TEST 0x12345678
#define MACHINE_SIGNATURE_SIZE 9 + 5*19 + 1
static char *
FcCacheProduceMachineSignature (void);
/*
* POSIX has broken stdio so that getc must do thread-safe locking,
* this is a serious performance problem for applications doing large
* amounts of IO with getc (as is done here). If available, use
* the getc_unlocked varient instead.
*/
#if defined(getc_unlocked) || defined(_IO_getc_unlocked)
#define GETC(f) getc_unlocked(f)
#define PUTC(c,f) putc_unlocked(c,f)
#else
#define GETC(f) getc(f)
#define PUTC(c,f) putc(c,f)
#endif
#define FC_DBG_CACHE_REF 1024
#define PAGESIZE 8192
static FcBool force;
static FcChar8 *
FcCacheReadString (FILE *f, FcChar8 *dest, int len)
{
int c;
FcBool escape;
FcChar8 *d;
int size;
int i;
while ((c = GETC (f)) != EOF)
if (c == '"')
break;
if (c == EOF)
return FcFalse;
if (len == 0)
return FcFalse;
size = len;
i = 0;
d = dest;
escape = FcFalse;
while ((c = GETC (f)) != EOF)
{
if (!escape)
{
switch (c) {
case '"':
c = '\0';
break;
case '\\':
escape = FcTrue;
continue;
}
}
if (i == size)
{
FcChar8 *new = malloc (size * 2); /* freed in caller */
if (!new)
break;
memcpy (new, d, size);
size *= 2;
if (d != dest)
free (d);
d = new;
}
d[i++] = c;
if (c == '\0')
return d;
escape = FcFalse;
}
if (d != dest)
free (d);
return 0;
}
static FcBool
FcCacheReadUlong (FILE *f, unsigned long *dest)
{
unsigned long t;
int c;
while ((c = GETC (f)) != EOF)
{
if (!isspace (c))
break;
}
if (c == EOF)
return FcFalse;
t = 0;
for (;;)
{
if (c == EOF || isspace (c))
break;
if (!isdigit (c))
return FcFalse;
t = t * 10 + (c - '0');
c = GETC (f);
}
*dest = t;
return FcTrue;
}
static FcBool
FcCacheReadInt (FILE *f, int *dest)
{
unsigned long t;
FcBool ret;
ret = FcCacheReadUlong (f, &t);
if (ret)
*dest = (int) t;
return ret;
}
static FcBool
FcCacheReadTime (FILE *f, time_t *dest)
{
unsigned long t;
FcBool ret;
ret = FcCacheReadUlong (f, &t);
if (ret)
*dest = (time_t) t;
return ret;
}
static FcBool
FcCacheWriteChars (FILE *f, const FcChar8 *chars)
{
FcChar8 c;
while ((c = *chars++))
{
switch (c) {
case '"':
case '\\':
if (PUTC ('\\', f) == EOF)
return FcFalse;
/* fall through */
default:
if (PUTC (c, f) == EOF)
return FcFalse;
}
}
return FcTrue;
}
static FcBool
FcCacheWriteString (FILE *f, const FcChar8 *string)
{
if (PUTC ('"', f) == EOF)
return FcFalse;
if (!FcCacheWriteChars (f, string))
return FcFalse;
if (PUTC ('"', f) == EOF)
return FcFalse;
return FcTrue;
}
static FcBool
FcCacheWritePath (FILE *f, const FcChar8 *dir, const FcChar8 *file)
{
if (PUTC ('"', f) == EOF)
return FcFalse;
if (dir)
if (!FcCacheWriteChars (f, dir))
return FcFalse;
#ifdef _WIN32
if (dir &&
dir[strlen((const char *) dir) - 1] != '/' &&
dir[strlen((const char *) dir) - 1] != '\\')
{
if (!FcCacheWriteChars (f, "\\"))
return FcFalse;
}
#else
if (dir && dir[strlen((const char *) dir) - 1] != '/')
if (PUTC ('/', f) == EOF)
return FcFalse;
#endif
if (!FcCacheWriteChars (f, file))
return FcFalse;
if (PUTC ('"', f) == EOF)
return FcFalse;
return FcTrue;
}
static FcBool
FcCacheWriteUlong (FILE *f, unsigned long t)
{
int pow;
unsigned long temp, digit;
temp = t;
pow = 1;
while (temp >= 10)
{
temp /= 10;
pow *= 10;
}
temp = t;
while (pow)
{
digit = temp / pow;
if (PUTC ((char) digit + '0', f) == EOF)
return FcFalse;
temp = temp - pow * digit;
pow = pow / 10;
}
return FcTrue;
}
static FcBool
FcCacheWriteInt (FILE *f, int i)
{
return FcCacheWriteUlong (f, (unsigned long) i);
}
static FcBool
FcCacheWriteTime (FILE *f, time_t t)
{
return FcCacheWriteUlong (f, (unsigned long) t);
}
static FcChar8 *
FcCacheReadString2 (int fd, FcChar8 *dest, int len)
{
FcChar8 c;
FcBool escape;
int size;
int i;
if (len == 0)
return FcFalse;
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
FcCacheWriteString2 (int fd, const FcChar8 *chars)
{
if (write (fd, chars, strlen(chars)+1) != strlen(chars)+1)
return FcFalse;
return FcTrue;
}
static FcBool
FcCacheFontSetAdd (FcFontSet *set,
FcStrSet *dirs,
const FcChar8 *dir,
int dir_len,
const FcChar8 *file,
const FcChar8 *name,
FcConfig *config)
{
FcChar8 path_buf[8192], *path;
int len;
FcBool ret = FcFalse;
FcPattern *font;
FcPattern *frozen;
path = path_buf;
len = (dir_len + 1 + strlen ((const char *) file) + 1);
if (len > sizeof (path_buf))
{
path = malloc (len); /* freed down below */
if (!path)
return FcFalse;
}
strncpy ((char *) path, (const char *) dir, dir_len);
#ifdef _WIN32
if (dir[dir_len - 1] != '/' && dir[dir_len - 1] != '\\' )
path[dir_len++] = '\\';
#else
if (dir[dir_len - 1] != '/')
path[dir_len++] = '/';
#endif
strcpy ((char *) path + dir_len, (const char *) file);
if (config && !FcConfigAcceptFilename (config, path))
ret = FcTrue;
else if (!FcStrCmp (name, FC_FONT_FILE_DIR))
{
if (FcDebug () & FC_DBG_CACHEV)
printf (" dir cache dir \"%s\"\n", path);
ret = FcStrSetAdd (dirs, path);
}
else if (!FcStrCmp (name, FC_FONT_FILE_INVALID))
{
ret = FcTrue;
}
else
{
font = FcNameParse (name);
if (font)
{
FcChar8 *family;
if (FcDebug () & FC_DBG_CACHEV)
printf (" dir cache file \"%s\"\n", file);
ret = FcPatternAddString (font, FC_FILE, path);
/*
* Make sure the pattern has the file name as well as
* already containing at least one family name.
*/
if (ret &&
FcPatternGetString (font, FC_FAMILY, 0, &family) == FcResultMatch &&
(!config || FcConfigAcceptFont (config, font)))
{
frozen = FcPatternFreeze (font);
ret = (frozen != 0);
if (ret)
ret = FcFontSetAdd (set, frozen);
}
FcPatternDestroy (font);
}
}
if (path != path_buf) free (path);
return ret;
}
static unsigned int
FcCacheHash (const FcChar8 *string, int len)
{
unsigned int h = 0;
FcChar8 c;
while (len-- && (c = *string++))
h = (h << 1) ^ c;
return h;
}
/*
* Verify the saved timestamp for a file
*/
FcBool
FcGlobalCacheCheckTime (const FcChar8 *file, FcGlobalCacheInfo *info)
{
struct stat statb;
if (stat ((char *) file, &statb) < 0)
{
if (FcDebug () & FC_DBG_CACHE)
printf (" file %s missing\n", file);
return FcFalse;
}
if (statb.st_mtime != info->time)
{
if (FcDebug () & FC_DBG_CACHE)
printf (" timestamp mismatch (was %d is %d)\n",
(int) info->time, (int) statb.st_mtime);
return FcFalse;
}
return FcTrue;
}
void
FcGlobalCacheReferenced (FcGlobalCache *cache,
FcGlobalCacheInfo *info)
{
if (!info->referenced)
{
info->referenced = FcTrue;
cache->referenced++;
if (FcDebug () & FC_DBG_CACHE_REF)
printf ("Reference %d %s\n", cache->referenced, info->file);
}
}
/*
* 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)
{
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;
}
FcGlobalCacheDir *
FcGlobalCacheDirGet (FcGlobalCache *cache,
const FcChar8 *dir,
int len,
FcBool create_missing)
{
unsigned int hash = FcCacheHash (dir, len);
FcGlobalCacheDir *d, **prev;
for (prev = &cache->ents[hash % FC_GLOBAL_CACHE_DIR_HASH_SIZE];
(d = *prev);
prev = &(*prev)->next)
{
if (d->info.hash == hash && d->len == len &&
!strncmp ((const char *) d->info.file,
(const char *) dir, len))
break;
}
if (!(d = *prev))
{
int i;
if (!create_missing)
return 0;
d = malloc (sizeof (FcGlobalCacheDir) + len + 1);
if (!d)
return 0;
FcMemAlloc (FC_MEM_CACHE, sizeof (FcGlobalCacheDir) + len + 1);
d->next = *prev;
*prev = d;
d->info.hash = hash;
d->info.file = (FcChar8 *) (d + 1);
strncpy ((char *) d->info.file, (const char *) dir, len);
d->info.file[len] = '\0';
d->info.time = 0;
d->info.referenced = FcFalse;
d->len = len;
for (i = 0; i < FC_GLOBAL_CACHE_FILE_HASH_SIZE; i++)
d->ents[i] = 0;
d->subdirs = 0;
}
return d;
}
static FcGlobalCacheInfo *
FcGlobalCacheDirAdd (FcGlobalCache *cache,
const FcChar8 *dir,
time_t time,
FcBool replace,
FcBool create_missing)
{
FcGlobalCacheDir *d;
FcFilePathInfo i;
FcGlobalCacheSubdir *subdir;
FcGlobalCacheDir *parent;
i = FcFilePathInfoGet (dir);
parent = FcGlobalCacheDirGet (cache, i.dir, i.dir_len, create_missing);
/*
* Tricky here -- directories containing fonts.cache-1 files
* need entries only when the parent doesn't have a cache file.
* That is, when the parent already exists in the cache, is
* referenced and has a "real" timestamp. The time of 0 is
* special and marks directories which got stuck in the
* global cache for this very reason. Yes, it could
* use a separate boolean field, and probably should.
*/
if (!parent || (!create_missing &&
(!parent->info.referenced ||
(parent->info.time == 0))))
return 0;
/*
* Add this directory to the cache
*/
d = FcGlobalCacheDirGet (cache, dir, strlen ((const char *) dir), FcTrue);
if (!d)
return 0;
d->info.time = time;
/*
* Add this directory to the subdirectory list of the parent
*/
subdir = malloc (sizeof (FcGlobalCacheSubdir));
if (!subdir)
return 0;
FcMemAlloc (FC_MEM_CACHE, sizeof (FcGlobalCacheSubdir));
subdir->ent = d;
subdir->next = parent->subdirs;
parent->subdirs = subdir;
return &d->info;
}
static void
FcGlobalCacheDirDestroy (FcGlobalCacheDir *d)
{
FcGlobalCacheFile *f, *next;
int h;
FcGlobalCacheSubdir *s, *nexts;
for (h = 0; h < FC_GLOBAL_CACHE_FILE_HASH_SIZE; h++)
for (f = d->ents[h]; f; f = next)
{
next = f->next;
FcMemFree (FC_MEM_CACHE, sizeof (FcGlobalCacheFile) +
strlen ((char *) f->info.file) + 1 +
strlen ((char *) f->name) + 1);
free (f);
}
for (s = d->subdirs; s; s = nexts)
{
nexts = s->next;
FcMemFree (FC_MEM_CACHE, sizeof (FcGlobalCacheSubdir));
free (s);
}
FcMemFree (FC_MEM_CACHE, sizeof (FcGlobalCacheDir) + d->len + 1);
free (d);
}
/*
* If the parent is in the global cache and referenced, add
* an entry for 'dir' to the global cache. This is used
* for directories with fonts.cache files
*/
void
FcGlobalCacheReferenceSubdir (FcGlobalCache *cache,
const FcChar8 *dir)
{
FcGlobalCacheInfo *info;
info = FcGlobalCacheDirAdd (cache, dir, 0, FcFalse, FcFalse);
if (info && !info->referenced)
{
info->referenced = FcTrue;
cache->referenced++;
}
}
/*
* Check to see if the global cache contains valid data for 'dir'.
* If so, scan the global cache for files and directories in 'dir'.
* else, return False.
*/
FcBool
FcGlobalCacheScanDir (FcFontSet *set,
FcStrSet *dirs,
FcGlobalCache *cache,
const FcChar8 *dir,
FcConfig *config)
{
FcGlobalCacheDir *d = FcGlobalCacheDirGet (cache, dir,
strlen ((const char *) dir),
FcFalse);
FcGlobalCacheFile *f;
int h;
int dir_len;
FcGlobalCacheSubdir *subdir;
FcBool any_in_cache = FcFalse;
if (FcDebug() & FC_DBG_CACHE)
printf ("FcGlobalCacheScanDir %s\n", dir);
if (!d)
{
if (FcDebug () & FC_DBG_CACHE)
printf ("\tNo dir cache entry\n");
return FcFalse;
}
/*
* See if the timestamp recorded in the global cache
* matches the directory time, if not, return False
*/
if (!FcGlobalCacheCheckTime (d->info.file, &d->info))
{
if (FcDebug () & FC_DBG_CACHE)
printf ("\tdir cache entry time mismatch\n");
return FcFalse;
}
/*
* Add files from 'dir' to the fontset
*/
dir_len = strlen ((const char *) dir);
for (h = 0; h < FC_GLOBAL_CACHE_FILE_HASH_SIZE; h++)
for (f = d->ents[h]; f; f = f->next)
{
if (FcDebug() & FC_DBG_CACHEV)
printf ("FcGlobalCacheScanDir add file %s\n", f->info.file);
any_in_cache = FcTrue;
if (!FcCacheFontSetAdd (set, dirs, dir, dir_len,
f->info.file, f->name, config))
{
cache->broken = FcTrue;
return FcFalse;
}
FcGlobalCacheReferenced (cache, &f->info);
}
/*
* Add directories in 'dir' to 'dirs'
*/
for (subdir = d->subdirs; subdir; subdir = subdir->next)
{
FcFilePathInfo info = FcFilePathInfoGet (subdir->ent->info.file);
any_in_cache = FcTrue;
if (!FcCacheFontSetAdd (set, dirs, dir, dir_len,
info.base, FC_FONT_FILE_DIR, config))
{
cache->broken = FcTrue;
return FcFalse;
}
FcGlobalCacheReferenced (cache, &subdir->ent->info);
}
FcGlobalCacheReferenced (cache, &d->info);
/*
* To recover from a bug in previous versions of fontconfig,
* return FcFalse if no entries in the cache were found
* for this directory. This will cause any empty directories
* to get rescanned every time fontconfig is initialized. This
* might get removed at some point when the older cache files are
* presumably fixed.
*/
return any_in_cache;
}
/*
* Locate the cache entry for a particular file
*/
FcGlobalCacheFile *
FcGlobalCacheFileGet (FcGlobalCache *cache,
const FcChar8 *file,
int id,
int *count)
{
FcFilePathInfo i = FcFilePathInfoGet (file);
FcGlobalCacheDir *d = FcGlobalCacheDirGet (cache, i.dir,
i.dir_len, FcFalse);
FcGlobalCacheFile *f, *match = 0;
int max = -1;
if (!d)
return 0;
for (f = d->ents[i.base_hash % FC_GLOBAL_CACHE_FILE_HASH_SIZE]; f; f = f->next)
{
if (f->info.hash == i.base_hash &&
!strcmp ((const char *) f->info.file, (const char *) i.base))
{
if (f->id == id)
match = f;
if (f->id > max)
max = f->id;
}
}
if (count)
*count = max + 1;
return match;
}
/*
* Add a file entry to the cache
*/
static FcGlobalCacheInfo *
FcGlobalCacheFileAdd (FcGlobalCache *cache,
const FcChar8 *path,
int id,
time_t time,
const FcChar8 *name,
FcBool replace)
{
FcFilePathInfo i = FcFilePathInfoGet (path);
FcGlobalCacheDir *d = FcGlobalCacheDirGet (cache, i.dir,
i.dir_len, FcTrue);
FcGlobalCacheFile *f, **prev;
int size;
if (!d)
return 0;
for (prev = &d->ents[i.base_hash % FC_GLOBAL_CACHE_FILE_HASH_SIZE];
(f = *prev);
prev = &(*prev)->next)
{
if (f->info.hash == i.base_hash &&
f->id == id &&
!strcmp ((const char *) f->info.file, (const char *) i.base))
{
break;
}
}
if (*prev)
{
if (!replace)
return 0;
f = *prev;
if (f->info.referenced)
cache->referenced--;
*prev = f->next;
FcMemFree (FC_MEM_CACHE, sizeof (FcGlobalCacheFile) +
strlen ((char *) f->info.file) + 1 +
strlen ((char *) f->name) + 1);
free (f);
}
size = (sizeof (FcGlobalCacheFile) +
strlen ((char *) i.base) + 1 +
strlen ((char *) name) + 1);
f = malloc (size);
if (!f)
return 0;
FcMemAlloc (FC_MEM_CACHE, size);
f->next = *prev;
*prev = f;
f->info.hash = i.base_hash;
f->info.file = (FcChar8 *) (f + 1);
f->info.time = time;
f->info.referenced = FcFalse;
f->id = id;
f->name = f->info.file + strlen ((char *) i.base) + 1;
strcpy ((char *) f->info.file, (const char *) i.base);
strcpy ((char *) f->name, (const char *) name);
return &f->info;
}
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->updated = FcFalse;
cache->broken = FcFalse;
return cache;
}
void
FcGlobalCacheDestroy (FcGlobalCache *cache)
{
FcGlobalCacheDir *d, *next;
int h;
for (h = 0; h < FC_GLOBAL_CACHE_DIR_HASH_SIZE; h++)
{
for (d = cache->ents[h]; d; d = next)
{
next = d->next;
FcGlobalCacheDirDestroy (d);
}
}
FcMemFree (FC_MEM_CACHE, sizeof (FcGlobalCache));
free (cache);
}
/*
* Cache file syntax is quite simple:
*
* "file_name" id time "font_name" \n
*/
void
FcGlobalCacheLoad (FcGlobalCache *cache,
const FcChar8 *cache_file)
{
FILE *f;
FcChar8 file_buf[8192], *file;
int id;
time_t time;
FcChar8 name_buf[8192], *name;
FcGlobalCacheInfo *info;
f = fopen ((char *) cache_file, "r");
if (!f)
return;
cache->updated = FcFalse;
file = 0;
name = 0;
while ((file = FcCacheReadString (f, file_buf, sizeof (file_buf))) &&
FcCacheReadInt (f, &id) &&
FcCacheReadTime (f, &time) &&
(name = FcCacheReadString (f, name_buf, sizeof (name_buf))))
{
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;
}
if (file && file != file_buf)
free (file);
if (name && name != name_buf)
free (name);
fclose (f);
}
FcBool
FcGlobalCacheUpdate (FcGlobalCache *cache,
const FcChar8 *file,
int id,
const FcChar8 *name)
{
const FcChar8 *match;
struct stat statb;
FcGlobalCacheInfo *info;
match = file;
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;
}
FcBool
FcGlobalCacheSave (FcGlobalCache *cache,
const FcChar8 *cache_file)
{
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;
#if defined (HAVE_GETUID) && defined (HAVE_GETEUID)
/* Set-UID programs can't safely update the cache */
if (getuid () != geteuid ())
return FcFalse;
#endif
atomic = FcAtomicCreate (cache_file);
if (!atomic)
goto bail0;
if (!FcAtomicLock (atomic))
goto bail1;
f = fopen ((char *) FcAtomicNewFile(atomic), "w");
if (!f)
goto bail2;
for (dir_hash = 0; dir_hash < FC_GLOBAL_CACHE_DIR_HASH_SIZE; dir_hash++)
{
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;
}
}
}
}
if (fclose (f) == EOF)
goto bail3;
if (!FcAtomicReplaceOrig (atomic))
goto bail3;
FcAtomicUnlock (atomic);
FcAtomicDestroy (atomic);
cache->updated = FcFalse;
return FcTrue;
bail4:
fclose (f);
bail3:
FcAtomicDeleteNew (atomic);
bail2:
FcAtomicUnlock (atomic);
bail1:
FcAtomicDestroy (atomic);
bail0:
return FcFalse;
}
/*
* Find the next presumably-mmapable offset after the current file
* pointer.
*/
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;
lseek (fd, current_arch_start, SEEK_SET);
if (FcCacheReadString2 (fd, candidate_arch_machine_name_count,
sizeof (candidate_arch_machine_name_count)) == 0)
break;
if (!strlen(candidate_arch_machine_name_count))
return -1;
bs = strtol(candidate_arch_machine_name_count, &candidate_arch, 16);
candidate_arch++; /* skip leading space */
if (strcmp (candidate_arch, arch)==0)
break;
current_arch_start += bs;
}
if (strcmp (candidate_arch, arch)!=0)
return -1;
return current_arch_start;
}
/* 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)
{
char * buf = malloc (BUF_SIZE);
char candidate_arch_machine_name[MACHINE_SIGNATURE_SIZE + 9];
long bs;
int c, bytes_skipped;
if (!buf)
return FcFalse;
lseek (fd, start, SEEK_SET);
if (FcCacheReadString2 (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, BUF_SIZE)) <= 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;
}
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 > 0)
return FcFalse;
return FcTrue;
}
static int
FcCacheReadDirs (FcConfig * config, FcGlobalCache * cache,
FcStrList *list, FcFontSet * set)
{
DIR *d;
struct dirent *e;
int ret = 0;
FcChar8 *dir;
FcChar8 *file, *base;
FcStrSet *subdirs;
FcStrList *sublist;
struct stat statb;
/*
* Now scan all of the directories into separate databases
* and write out the results
*/
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;
}
d = opendir ((char *) dir);
if (!d)
{
FcStrSetDestroy (subdirs);
free (file);
continue;
}
while ((e = readdir (d)))
{
if (e->d_name[0] != '.' && strlen (e->d_name) < FC_MAX_FILE_LEN)
{
strcpy ((char *) base, (char *) e->d_name);
if (FcFileIsDir (file) && !FcStrSetAdd (subdirs, file))
ret++;
}
}
closedir (d);
if (!FcDirCacheValid (dir) || !FcDirCacheRead (set, dir))
{
if (FcDebug () & FC_DBG_FONTSET)
printf ("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 (force)
goto bail;
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, const FcChar8 *dir)
{
FcChar8 *cache_file = FcStrPlus (dir, (FcChar8 *) "/" FC_DIR_CACHE_FILE);
int fd;
FcCache metadata;
void * current_dir_block;
char * current_arch_machine_name;
char candidate_arch_machine_name[9+MACHINE_SIGNATURE_SIZE];
off_t current_arch_start = 0;
if (force)
goto bail;
if (!cache_file)
goto bail;
current_arch_machine_name = FcCacheProduceMachineSignature();
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 (FcCacheReadString2 (fd, candidate_arch_machine_name,
sizeof (candidate_arch_machine_name)) == 0)
goto bail1;
// sanity check for endianness issues
read(fd, &metadata, sizeof(FcCache));
if (metadata.magic != FC_CACHE_MAGIC)
goto bail1;
if (!metadata.count)
goto bail1;
off_t 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)
perror("");
if (!FcFontSetUnserialize (metadata, set, current_dir_block))
goto bail1;
close(fd);
free (cache_file);
return FcTrue;
bail1:
close(fd);
bail:
free (cache_file);
return FcFalse;
}
/* write serialized state to the cache file */
FcBool
FcDirCacheWrite (int bank, FcFontSet *set, const FcChar8 *dir)
{
FcChar8 *cache_file = FcStrPlus (dir, (FcChar8 *) "/" FC_DIR_CACHE_FILE);
int fd, bytes_to_write, metadata_bytes;
FcCache metadata;
off_t current_arch_start = 0, truncate_to;
char * current_arch_machine_name, * header;
void * current_dir_block, *final_dir_block;
if (!cache_file)
goto bail;
FcFontSetNewBank();
bytes_to_write = FcFontSetNeededBytes (set);
metadata_bytes = FcCacheNextOffset (sizeof (FcCache));
if (!bytes_to_write)
{
unlink (cache_file);
free (cache_file);
return FcTrue;
}
current_dir_block = malloc (bytes_to_write);
memset (&metadata, 0, sizeof(FcCache));
metadata.count = bytes_to_write;
metadata.bank = bank;
if (!current_dir_block)
goto bail;
final_dir_block = FcFontSetDistributeBytes (&metadata, current_dir_block);
if ((char *)current_dir_block + bytes_to_write != final_dir_block)
goto bail;
if (!FcFontSetSerialize (bank, set))
goto bail;
if (FcDebug () & FC_DBG_CACHE)
printf ("FcDirCacheWriteDir cache_file \"%s\"\n", cache_file);
fd = open(cache_file, O_RDWR | O_CREAT, 0666);
if (fd == -1)
goto bail;
current_arch_machine_name = FcCacheProduceMachineSignature ();
current_arch_start = FcCacheSkipToArch(fd, current_arch_machine_name);
if (current_arch_start < 0)
current_arch_start = FcCacheNextOffset (lseek(fd, 0, SEEK_END));
if (!FcCacheMoveDown(fd, current_arch_start))
goto bail1;
current_arch_start = lseek(fd, 0, SEEK_CUR);
if (ftruncate (fd, current_arch_start) == -1)
goto bail1;
/* now write the address of the next offset */
truncate_to = FcCacheNextOffset (FcCacheNextOffset (current_arch_start + metadata_bytes) + bytes_to_write) - current_arch_start;
header = malloc (10 + strlen (current_arch_machine_name));
sprintf (header, "%8x ", (int)truncate_to);
strcat (header, current_arch_machine_name);
if (!FcCacheWriteString2 (fd, header))
goto bail1;
metadata.magic = FC_CACHE_MAGIC;
write (fd, &metadata, sizeof(FcCache));
lseek (fd, FcCacheNextOffset (lseek(fd, 0, SEEK_END)), SEEK_SET);
write (fd, current_dir_block, bytes_to_write);
/* this actually serves to pad out the cache file, if needed */
if (ftruncate (fd, current_arch_start + truncate_to) == -1)
goto bail1;
close(fd);
return FcTrue;
bail1:
free (current_dir_block);
free (current_arch_machine_name);
bail:
unlink (cache_file);
free (cache_file);
return FcFalse;
}
static char *
FcCacheProduceMachineSignature ()
{
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],
sizeof (char),
sizeof (char *),
sizeof (int),
sizeof (FcPattern),
sizeof (FcPatternEltPtr),
sizeof (struct _FcPatternElt *),
sizeof (FcPatternElt),
sizeof (FcObjectPtr),
sizeof (FcValueListPtr),
sizeof (FcValue),
sizeof (FcValueBinding),
sizeof (struct _FcValueList *),
sizeof (FcCharSet),
sizeof (FcCharLeaf **),
sizeof (FcChar16 *),
sizeof (FcChar16),
sizeof (FcCharLeaf),
sizeof (FcChar32),
sizeof (FcCache));
return buf;
}
/* if true, ignore the cache file */
void
FcCacheForce (FcBool f)
{
force = f;
}
static int banks_ptr = 0, banks_alloc = 0;
static int * bankId = 0;
int
FcCacheBankCount (void)
{
return banks_ptr;
}
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)
{
static int lastBank = FC_BANK_DYNAMIC, lastIndex = -1;
int i;
int * b;
if (bank == lastBank)
return lastIndex;
for (i = 0; i < banks_ptr; i++)
if (bankId[i] == bank)
return i;
if (banks_ptr >= banks_alloc)
{
b = realloc (bankId, (banks_alloc + 4) * sizeof(int));
if (!b)
return -1;
bankId = b;
banks_alloc += 4;
}
i = banks_ptr++;
bankId[i] = bank;
return i;
}
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