/*
- * $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
*
* documentation for any purpose is hereby granted without fee, provided that
* the above copyright notice appear in all copies and that both that
* copyright notice and this permission notice appear in supporting
- * documentation, and that the name of Keith Packard not be used in
+ * documentation, and that the name of the author(s) not be used in
* advertising or publicity pertaining to distribution of the software without
- * specific, written prior permission. Keith Packard makes no
+ * specific, written prior permission. The authors make no
* representations about the suitability of this software for any purpose. It
* is provided "as is" without express or implied warranty.
*
- * KEITH PACKARD DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
+ * THE AUTHOR(S) DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
- * EVENT SHALL KEITH PACKARD BE LIABLE FOR ANY SPECIAL, INDIRECT OR
+ * EVENT SHALL THE AUTHOR(S) BE LIABLE FOR ANY SPECIAL, INDIRECT OR
* CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
* DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
* TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
* PERFORMANCE OF THIS SOFTWARE.
*/
+#include "fcint.h"
+#include "fcarch.h"
+#include <stdio.h>
#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 ENDIAN_TEST 0x12345678
-#define MACHINE_SIGNATURE_SIZE 9 + 5*20 + 1
-
-static int
-FcDirCacheOpen (const FcChar8 * dir);
-
-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);
+#include <assert.h>
+#if defined(HAVE_MMAP) || defined(__CYGWIN__)
+# include <unistd.h>
+# include <sys/mman.h>
+#elif defined(_WIN32)
+# define _WIN32_WINNT 0x0500
+# include <windows.h>
+#endif
-static FcBool
-FcCacheHaveBank (int bank);
+#ifndef O_BINARY
+#define O_BINARY 0
+#endif
-static void
-FcCacheAddBankDir (int bank, const char * dir);
struct MD5Context {
FcChar32 buf[4];
};
static void MD5Init(struct MD5Context *ctx);
-static void MD5Update(struct MD5Context *ctx, unsigned char *buf, unsigned len);
+static void MD5Update(struct MD5Context *ctx, const unsigned char *buf, unsigned len);
static void MD5Final(unsigned char digest[16], struct MD5Context *ctx);
static void MD5Transform(FcChar32 buf[4], FcChar32 in[16]);
-#define FC_DBG_CACHE_REF 1024
+#define CACHEBASE_LEN (1 + 32 + 1 + sizeof (FC_ARCHITECTURE) + sizeof (FC_CACHE_SUFFIX))
+
+#ifdef _WIN32
+
+#include <windows.h>
+
+#ifdef __GNUC__
+typedef long long INT64;
+#define EPOCH_OFFSET 11644473600ll
+#else
+#define EPOCH_OFFSET 11644473600i64
+typedef __int64 INT64;
+#endif
+
+/* Workaround for problems in the stat() in the Microsoft C library:
+ *
+ * 1) stat() uses FindFirstFile() to get the file
+ * attributes. Unfortunately this API doesn't return correct values
+ * for modification time of a directory until some time after a file
+ * or subdirectory has been added to the directory. (This causes
+ * run-test.sh to fail, for instance.) GetFileAttributesEx() is
+ * better, it returns the updated timestamp right away.
+ *
+ * 2) stat() does some strange things related to backward
+ * compatibility with the local time timestamps on FAT volumes and
+ * daylight saving time. This causes problems after the switches
+ * to/from daylight saving time. See
+ * http://bugzilla.gnome.org/show_bug.cgi?id=154968 , especially
+ * comment #30, and http://www.codeproject.com/datetime/dstbugs.asp .
+ * We don't need any of that, FAT and Win9x are as good as dead. So
+ * just use the UTC timestamps from NTFS, converted to the Unix epoch.
+ */
-static char *
-FcCacheReadString (int fd, char *dest, int len)
+int
+FcStat (const char *file, struct stat *statb)
{
- int size;
- int slen;
+ WIN32_FILE_ATTRIBUTE_DATA wfad;
+ char full_path_name[MAX_PATH];
+ char *basename;
+ DWORD rc;
- if (len == 0)
- return 0;
+ if (!GetFileAttributesEx (file, GetFileExInfoStandard, &wfad))
+ return -1;
- size = read (fd, dest, len-1);
+ statb->st_dev = 0;
- if (size > 0)
- {
- dest[size] = '\0';
- slen = strlen (dest);
+ /* Calculate a pseudo inode number as a hash of the full path name.
+ * Call GetLongPathName() to get the spelling of the path name as it
+ * is on disk.
+ */
+ rc = GetFullPathName (file, sizeof (full_path_name), full_path_name, &basename);
+ if (rc == 0 || rc > sizeof (full_path_name))
+ return -1;
- lseek (fd, slen - size + 1, SEEK_CUR);
- return slen < len ? dest : 0;
- }
+ rc = GetLongPathName (full_path_name, full_path_name, sizeof (full_path_name));
+ statb->st_ino = FcStringHash (full_path_name);
+
+ statb->st_mode = _S_IREAD | _S_IWRITE;
+ statb->st_mode |= (statb->st_mode >> 3) | (statb->st_mode >> 6);
+
+ if (wfad.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY)
+ statb->st_mode |= _S_IFDIR;
+ else
+ statb->st_mode |= _S_IFREG;
+
+ statb->st_nlink = 1;
+ statb->st_uid = statb->st_gid = 0;
+ statb->st_rdev = 0;
+
+ if (wfad.nFileSizeHigh > 0)
+ return -1;
+ statb->st_size = wfad.nFileSizeLow;
+
+ statb->st_atime = (*(INT64 *)&wfad.ftLastAccessTime)/10000000 - EPOCH_OFFSET;
+ statb->st_mtime = (*(INT64 *)&wfad.ftLastWriteTime)/10000000 - EPOCH_OFFSET;
+ statb->st_ctime = statb->st_mtime;
return 0;
}
-static void
-FcCacheSkipString (int fd)
+#else
+
+int
+FcStat (const char *file, struct stat *statb)
+{
+ return stat ((char *) file, statb);
+}
+
+#endif
+
+static const char bin2hex[] = { '0', '1', '2', '3',
+ '4', '5', '6', '7',
+ '8', '9', 'a', 'b',
+ 'c', 'd', 'e', 'f' };
+
+static FcChar8 *
+FcDirCacheBasename (const FcChar8 * dir, FcChar8 cache_base[CACHEBASE_LEN])
{
- char buf[256];
- int size;
- int slen;
+ unsigned char hash[16];
+ FcChar8 *hex_hash;
+ int cnt;
+ struct MD5Context ctx;
- while ( (size = read (fd, buf, sizeof (buf)-1)) > 0)
+ MD5Init (&ctx);
+ MD5Update (&ctx, (const unsigned char *)dir, strlen ((const char *) dir));
+
+ MD5Final (hash, &ctx);
+
+ cache_base[0] = '/';
+ hex_hash = cache_base + 1;
+ for (cnt = 0; cnt < 16; ++cnt)
{
- buf [size] = '\0';
- slen = strlen (buf);
- if (slen < size)
- {
- lseek (fd, slen - size + 1, SEEK_CUR);
- return;
- }
+ hex_hash[2*cnt ] = bin2hex[hash[cnt] >> 4];
+ hex_hash[2*cnt+1] = bin2hex[hash[cnt] & 0xf];
}
-}
+ hex_hash[2*cnt] = 0;
+ strcat ((char *) cache_base, "-" FC_ARCHITECTURE FC_CACHE_SUFFIX);
-static FcBool
-FcCacheWriteString (int fd, const char *chars)
-{
- if (write (fd, chars, strlen(chars)+1) != strlen(chars)+1)
- return FcFalse;
- return FcTrue;
+ return cache_base;
}
-static void
-FcGlobalCacheDirDestroy (FcGlobalCacheDir *d)
+FcBool
+FcDirCacheUnlink (const FcChar8 *dir, FcConfig *config)
{
- FcStrSetDestroy (d->subdirs);
- FcMemFree (FC_MEM_STRING, strlen (d->name)+1);
- free (d->name);
- FcMemFree (FC_MEM_CACHE, sizeof (FcGlobalCacheDir));
- free (d);
-}
+ FcChar8 *cache_hashed = NULL;
+ FcChar8 cache_base[CACHEBASE_LEN];
+ FcStrList *list;
+ FcChar8 *cache_dir;
-FcGlobalCache *
-FcGlobalCacheCreate (void)
-{
- FcGlobalCache *cache;
+ FcDirCacheBasename (dir, cache_base);
- 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;
+ list = FcStrListCreate (config->cacheDirs);
+ if (!list)
+ return FcFalse;
+
+ while ((cache_dir = FcStrListNext (list)))
+ {
+ cache_hashed = FcStrPlus (cache_dir, cache_base);
+ if (!cache_hashed)
+ break;
+ (void) unlink ((char *) cache_hashed);
+ FcStrFree (cache_hashed);
+ }
+ FcStrListDone (list);
+ /* return FcFalse if something went wrong */
+ if (cache_dir)
+ return FcFalse;
+ return FcTrue;
}
-void
-FcGlobalCacheDestroy (FcGlobalCache *cache)
+static int
+FcDirCacheOpenFile (const FcChar8 *cache_file, struct stat *file_stat)
{
- FcGlobalCacheDir *d, *next;
+ int fd;
- for (d = cache->dirs; d; d = next)
+#ifdef _WIN32
+ if (FcStat (cache_file, file_stat) < 0)
+ return -1;
+#endif
+ fd = open((char *) cache_file, O_RDONLY | O_BINARY);
+ if (fd < 0)
+ return fd;
+#ifndef _WIN32
+ if (fstat (fd, file_stat) < 0)
{
- next = d->next;
- FcGlobalCacheDirDestroy (d);
+ close (fd);
+ return -1;
}
- FcMemFree (FC_MEM_CACHE, sizeof (FcGlobalCache));
- free (cache);
+#endif
+ return fd;
}
-void
-FcGlobalCacheLoad (FcGlobalCache *cache,
- FcStrSet *staleDirs,
- const FcChar8 *cache_file,
- FcConfig *config)
+/*
+ * Look for a cache file for the specified dir. Attempt
+ * to use each one we find, stopping when the callback
+ * indicates success
+ */
+static FcBool
+FcDirCacheProcess (FcConfig *config, const FcChar8 *dir,
+ FcBool (*callback) (int fd, struct stat *fd_stat,
+ struct stat *dir_stat, void *closure),
+ void *closure, FcChar8 **cache_file_ret)
{
- 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];
-
- 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;
-
- if (!FcCacheReadString (cache->fd, name_buf, sizeof (name_buf)))
- goto bail_and_destroy;
- if (strcmp (name_buf, FC_GLOBAL_MAGIC_COOKIE) != 0)
- goto bail_and_destroy;
-
- 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)
- {
- 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;
- off_t off;
+ int fd = -1;
+ FcChar8 cache_base[CACHEBASE_LEN];
+ FcStrList *list;
+ FcChar8 *cache_dir;
+ struct stat file_stat, dir_stat;
+ FcBool ret = FcFalse;
- FcStrSetAdd (staleDirs, FcStrCopy ((FcChar8 *)name_buf));
+ if (FcStat (dir, &dir_stat) < 0)
+ return FcFalse;
- /* skip subdirs */
- while (FcCacheReadString (cache->fd, subdirName,
- sizeof (subdirName)) &&
- strlen (subdirName))
- ;
+ FcDirCacheBasename (dir, cache_base);
- if (read (cache->fd, &md, sizeof (FcCache)) != sizeof(FcCache))
- {
- perror ("read metadata");
- goto bail1;
- }
- off = FcCacheNextOffset (lseek(cache->fd, 0, SEEK_CUR)) + md.count;
- if (lseek (cache->fd, off, SEEK_SET) != off)
+ list = FcStrListCreate (config->cacheDirs);
+ if (!list)
+ return FcFalse;
+
+ while ((cache_dir = FcStrListNext (list)))
+ {
+ FcChar8 *cache_hashed = FcStrPlus (cache_dir, cache_base);
+ if (!cache_hashed)
+ break;
+ fd = FcDirCacheOpenFile (cache_hashed, &file_stat);
+ if (fd >= 0) {
+ ret = (*callback) (fd, &file_stat, &dir_stat, closure);
+ close (fd);
+ if (ret)
{
- perror ("lseek");
- goto bail1;
+ if (cache_file_ret)
+ *cache_file_ret = cache_hashed;
+ else
+ FcStrFree (cache_hashed);
+ break;
}
- continue;
- }
-
- d = malloc (sizeof (FcGlobalCacheDir));
- if (!d)
- goto bail1;
+ }
+ FcStrFree (cache_hashed);
+ }
+ FcStrListDone (list);
- d->next = cache->dirs;
- cache->dirs = d;
+ return ret;
+}
- d->name = (char *)FcStrCopy ((FcChar8 *)name_buf);
- d->ent = 0;
- d->state = FcGCDirFileRead;
+#define FC_CACHE_MIN_MMAP 1024
- d->subdirs = FcStrSetCreate();
- do
- {
- if (!FcCacheReadString (cache->fd, subdirName,
- sizeof (subdirName)) ||
- !strlen (subdirName))
- break;
- FcStrSetAdd (d->subdirs, (FcChar8 *)subdirName);
- } while (1);
+/*
+ * Skip list element, make sure the 'next' pointer is the last thing
+ * in the structure, it will be allocated large enough to hold all
+ * of the necessary pointers
+ */
- 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;
+typedef struct _FcCacheSkip FcCacheSkip;
- bail1:
- for (d = cache->dirs; d; d = next)
- {
- next = d->next;
- free (d);
- }
- cache->dirs = 0;
+struct _FcCacheSkip {
+ FcCache *cache;
+ int ref;
+ intptr_t size;
+ dev_t cache_dev;
+ ino_t cache_ino;
+ time_t cache_mtime;
+ FcCacheSkip *next[1];
+};
- close (cache->fd);
- cache->fd = -1;
- return;
+/*
+ * The head of the skip list; pointers for every possible level
+ * in the skip list, plus the largest level in the list
+ */
- bail_and_destroy:
- close (cache->fd);
- cache->fd = -1;
+#define FC_CACHE_MAX_LEVEL 16
- if (stat ((char *) cache_file, &cache_stat) == 0)
- unlink ((char *)cache_file);
+static FcCacheSkip *fcCacheChains[FC_CACHE_MAX_LEVEL];
+static int fcCacheMaxLevel;
- return;
+#if HAVE_RANDOM
+# define FcRandom() random()
+#else
+# if HAVE_LRAND48
+# define FcRandom() lrand48()
+# else
+# if HAVE_RAND
+# define FcRandom() rand()
+# endif
+# endif
+#endif
+/*
+ * Generate a random level number, distributed
+ * so that each level is 1/4 as likely as the one before
+ *
+ * Note that level numbers run 1 <= level <= MAX_LEVEL
+ */
+static int
+random_level (void)
+{
+ /* tricky bit -- each bit is '1' 75% of the time */
+ long int bits = FcRandom () | FcRandom ();
+ int level = 0;
+ while (++level < FC_CACHE_MAX_LEVEL)
+ {
+ if (bits & 1)
+ break;
+ bits >>= 1;
+ }
+ return level;
}
-FcBool
-FcGlobalCacheReadDir (FcFontSet *set, FcStrSet *dirs, FcGlobalCache * cache, const char *dir, FcConfig *config)
+/*
+ * Insert cache into the list
+ */
+static FcBool
+FcCacheInsert (FcCache *cache, struct stat *cache_stat)
{
- FcGlobalCacheDir *d;
- int i;
+ FcCacheSkip **update[FC_CACHE_MAX_LEVEL];
+ FcCacheSkip *s, **next;
+ int i, level;
- 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)
+ /*
+ * Find links along each chain
+ */
+ next = fcCacheChains;
+ for (i = fcCacheMaxLevel; --i >= 0; )
{
- if (strcmp (d->name, dir) == 0)
- {
- if (d->state == FcGCDirDisabled)
- return FcFalse;
+ for (; (s = next[i]); next = s->next)
+ if (s->cache > cache)
+ break;
+ update[i] = &next[i];
+ }
- if (d->state == FcGCDirFileRead)
- {
- lseek (cache->fd, d->offset, SEEK_SET);
- if (!FcDirCacheConsume (cache->fd, d->name, set, config))
- return FcFalse;
+ /*
+ * Create new list element
+ */
+ level = random_level ();
+ if (level > fcCacheMaxLevel)
+ {
+ level = fcCacheMaxLevel + 1;
+ update[fcCacheMaxLevel] = &fcCacheChains[fcCacheMaxLevel];
+ fcCacheMaxLevel = level;
+ }
- for (i = 0; i < d->subdirs->num; i++)
- FcStrSetAdd (dirs, (FcChar8 *)d->subdirs->strs[i]);
+ s = malloc (sizeof (FcCacheSkip) + (level - 1) * sizeof (FcCacheSkip *));
+ if (!s)
+ return FcFalse;
- d->state = FcGCDirConsumed;
- }
- return FcTrue;
- }
+ s->cache = cache;
+ s->size = cache->size;
+ s->ref = 1;
+ if (cache_stat)
+ {
+ s->cache_dev = cache_stat->st_dev;
+ s->cache_ino = cache_stat->st_ino;
+ s->cache_mtime = cache_stat->st_mtime;
+ }
+ else
+ {
+ s->cache_dev = 0;
+ s->cache_ino = 0;
+ s->cache_mtime = 0;
}
- return FcFalse;
+ /*
+ * Insert into all fcCacheChains
+ */
+ for (i = 0; i < level; i++)
+ {
+ s->next[i] = *update[i];
+ *update[i] = s;
+ }
+ return FcTrue;
}
-static FcGlobalCacheDir *
-FcGlobalCacheDirFind (FcGlobalCache *cache, const char *name)
+static FcCacheSkip *
+FcCacheFindByAddr (void *object)
{
- FcGlobalCacheDir * d;
-
- if (!cache || !name)
- return NULL;
-
- for (d = cache->dirs; d; d = d->next)
- if (strcmp((const char *)d->name, (const char *)name) == 0)
- return d;
+ int i;
+ FcCacheSkip **next = fcCacheChains;
+ FcCacheSkip *s;
+ /*
+ * Walk chain pointers one level at a time
+ */
+ for (i = fcCacheMaxLevel; --i >= 0;)
+ while (next[i] && (char *) object >= ((char *) next[i]->cache + next[i]->size))
+ next = next[i]->next;
+ /*
+ * Here we are
+ */
+ s = next[0];
+ if (s && (char *) object < ((char *) s->cache + s->size))
+ return s;
return NULL;
- }
+}
-FcBool
-FcGlobalCacheUpdate (FcGlobalCache *cache,
- FcStrSet *dirs,
- const char *orig_name,
- FcFontSet *set,
- FcConfig *config)
+static void
+FcCacheRemove (FcCache *cache)
{
- FcGlobalCacheDir *d;
- int i;
- const char *name;
-
- name = (char *)FcConfigNormalizeFontDir (config, (FcChar8 *)orig_name);
- if (!name)
- {
- fprintf(stderr, "Invalid directory name %s\n", orig_name);
- return FcFalse;
- }
+ FcCacheSkip **update[FC_CACHE_MAX_LEVEL];
+ FcCacheSkip *s, **next;
+ int i;
- d = FcGlobalCacheDirFind (cache, name);
-
- if (!d)
+ /*
+ * Find links along each chain
+ */
+ next = fcCacheChains;
+ for (i = fcCacheMaxLevel; --i >= 0; )
{
- d = malloc (sizeof (FcGlobalCacheDir));
- if (!d)
- return FcFalse;
- d->next = cache->dirs;
- cache->dirs = d;
- } else {
- /* free old resources */
- FcStrFree ((FcChar8 *)d->name);
- free (d->ent);
- FcStrSetDestroy (d->subdirs);
+ for (; (s = next[i]); next = s->next)
+ if (s->cache >= cache)
+ break;
+ update[i] = &next[i];
}
+ s = next[0];
+ for (i = 0; i < fcCacheMaxLevel && *update[i] == s; i++)
+ *update[i] = s->next[i];
+ while (fcCacheMaxLevel > 0 && fcCacheChains[fcCacheMaxLevel - 1] == NULL)
+ fcCacheMaxLevel--;
+ free (s);
+}
- cache->updated = FcTrue;
+static FcCache *
+FcCacheFindByStat (struct stat *cache_stat)
+{
+ FcCacheSkip *s;
- d->name = (char *)FcStrCopy ((FcChar8 *)name);
- d->ent = FcDirCacheProduce (set, &d->metadata);
- d->offset = 0;
- d->subdirs = FcStrSetCreate();
- d->state = FcGCDirUpdated;
- for (i = 0; i < dirs->num; i++)
- FcStrSetAdd (d->subdirs, dirs->strs[i]);
- return FcTrue;
+ for (s = fcCacheChains[0]; s; s = s->next[0])
+ if (s->cache_dev == cache_stat->st_dev &&
+ s->cache_ino == cache_stat->st_ino &&
+ s->cache_mtime == cache_stat->st_mtime)
+ {
+ s->ref++;
+ return s->cache;
+ }
+ return NULL;
}
-FcBool
-FcGlobalCacheSave (FcGlobalCache *cache,
- const FcChar8 *cache_file,
- FcConfig *config)
+static void
+FcDirCacheDispose (FcCache *cache)
{
- int fd, fd_orig, i;
- 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;
+ switch (cache->magic) {
+ case FC_CACHE_MAGIC_ALLOC:
+ free (cache);
+ break;
+ case FC_CACHE_MAGIC_MMAP:
+#if defined(HAVE_MMAP) || defined(__CYGWIN__)
+ munmap (cache, cache->size);
+#elif defined(_WIN32)
+ UnmapViewOfFile (cache);
#endif
-
- atomic = FcAtomicCreate (cache_file);
- if (!atomic)
- return FcFalse;
+ break;
+ }
+ FcCacheRemove (cache);
+}
- if (!FcAtomicLock (atomic))
- goto bail1;
- fd = open ((char *) FcAtomicNewFile(atomic), O_RDWR | O_CREAT,
- S_IRUSR | S_IWUSR);
- if (fd == -1)
- goto bail2;
- FcCacheWriteString (fd, FC_GLOBAL_MAGIC_COOKIE);
+void
+FcCacheObjectReference (void *object)
+{
+ FcCacheSkip *skip = FcCacheFindByAddr (object);
- fd_orig = open ((char *) FcAtomicOrigFile(atomic), O_RDONLY);
+ if (skip)
+ skip->ref++;
+}
- current_arch_machine_name = FcCacheMachineSignature ();
- if (fd_orig == -1)
- current_arch_start = 0;
- else
- current_arch_start = FcCacheSkipToArch (fd_orig,
- current_arch_machine_name);
+void
+FcCacheObjectDereference (void *object)
+{
+ FcCacheSkip *skip = FcCacheFindByAddr (object);
- if (current_arch_start < 0)
+ if (skip)
{
- 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);
+ skip->ref--;
+ if (skip->ref <= 0)
+ FcDirCacheDispose (skip->cache);
}
+}
- if (!FcCacheCopyOld(fd, fd_orig, current_arch_start))
- goto bail3;
+void
+FcCacheFini (void)
+{
+ int i;
- current_arch_start = lseek(fd, 0, SEEK_CUR);
- if (ftruncate (fd, current_arch_start) == -1)
- goto bail3;
+ for (i = 0; i < FC_CACHE_MAX_LEVEL; i++)
+ assert (fcCacheChains[i] == NULL);
+ assert (fcCacheMaxLevel == 0);
+}
- header = malloc (10 + strlen (current_arch_machine_name));
- if (!header)
- goto bail3;
+static FcBool
+FcCacheTimeValid (FcCache *cache, struct stat *dir_stat)
+{
+ struct stat dir_static;
- truncate_to = current_arch_start + strlen(current_arch_machine_name) + 11;
- for (dir = cache->dirs; dir; dir = dir->next)
+ if (!dir_stat)
{
- if (dir->state == FcGCDirDisabled)
- continue;
- 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 ++;
+ if (FcStat (FcCacheDir (cache), &dir_static) < 0)
+ return FcFalse;
+ dir_stat = &dir_static;
}
- truncate_to -= current_arch_start;
+ if (FcDebug () & FC_DBG_CACHE)
+ printf ("FcCacheTimeValid dir \"%s\" cache time %d dir time %d\n",
+ FcCacheDir (cache), cache->mtime, (int) dir_stat->st_mtime);
+ return cache->mtime == (int) dir_stat->st_mtime;
+}
- sprintf (header, "%8x ", (int)truncate_to);
- strcat (header, current_arch_machine_name);
- if (!FcCacheWriteString (fd, header))
- goto bail4;
+/*
+ * Map a cache file into memory
+ */
+static FcCache *
+FcDirCacheMapFd (int fd, struct stat *fd_stat, struct stat *dir_stat)
+{
+ FcCache *cache;
+ FcBool allocated = FcFalse;
+
+ if (fd_stat->st_size < sizeof (FcCache))
+ return NULL;
+ cache = FcCacheFindByStat (fd_stat);
+ if (cache)
+ {
+ if (FcCacheTimeValid (cache, dir_stat))
+ return cache;
+ FcDirCacheUnload (cache);
+ cache = NULL;
+ }
- for (dir = cache->dirs; dir; dir = dir->next)
+ /*
+ * Lage cache files are mmap'ed, smaller cache files are read. This
+ * balances the system cost of mmap against per-process memory usage.
+ */
+ if (fd_stat->st_size >= FC_CACHE_MIN_MMAP)
{
- const char * d;
- off_t off;
-
- if (!dir->name || dir->state == FcGCDirDisabled)
- continue;
- d = (const char *)FcConfigNormalizeFontDir (config, (const FcChar8 *)dir->name);
- if (!d)
- continue;
-
- if (dir->metadata.count && !dir->ent)
+#if defined(HAVE_MMAP) || defined(__CYGWIN__)
+ cache = mmap (0, fd_stat->st_size, PROT_READ, MAP_SHARED, fd, 0);
+ if (cache == MAP_FAILED)
+ cache = NULL;
+#elif defined(_WIN32)
{
- if (dir->state == FcGCDirUpdated || fd_orig < 0)
- {
- fprintf(stderr, "Invalid metadata entry for %s, skipping...\n", d);
- continue;
- }
- /* copy the old content */
- dir->ent = malloc (dir->metadata.count);
- if (!dir->ent)
- {
- perror("malloc error");
- continue;
- }
- off = FcCacheNextOffset (dir->offset + sizeof(FcCache));
- if (lseek (fd_orig, off, SEEK_SET) != off)
- {
- perror("lseek");
- free(dir->ent);
- continue;
- }
- if (read (fd_orig, dir->ent, dir->metadata.count)
- != dir->metadata.count)
+ HANDLE hFileMap;
+
+ cache = NULL;
+ hFileMap = CreateFileMapping((HANDLE) _get_osfhandle(fd), NULL,
+ PAGE_READONLY, 0, 0, NULL);
+ if (hFileMap != NULL)
{
- perror("read");
- free(dir->ent);
- continue;
+ cache = MapViewOfFile (hFileMap, FILE_MAP_READ, 0, 0,
+ fd_stat->st_size);
+ CloseHandle (hFileMap);
}
}
-
- FcCacheWriteString (fd, d);
+#endif
+ }
+ if (!cache)
+ {
+ cache = malloc (fd_stat->st_size);
+ if (!cache)
+ return NULL;
- for (i = 0; i < dir->subdirs->size; i++)
- FcCacheWriteString (fd, (char *)dir->subdirs->strs[i]);
- FcCacheWriteString (fd, "");
-
- if (write (fd, &dir->metadata, sizeof(FcCache)) != sizeof(FcCache))
+ if (read (fd, cache, fd_stat->st_size) != fd_stat->st_size)
{
- perror ("write metadata");
- free (dir->ent);
- continue;
+ free (cache);
+ return NULL;
}
- off = FcCacheNextOffset (lseek(fd, 0, SEEK_CUR));
- if (lseek (fd, off, SEEK_SET) != off)
+ allocated = FcTrue;
+ }
+ if (cache->magic != FC_CACHE_MAGIC_MMAP ||
+ cache->version < FC_CACHE_CONTENT_VERSION ||
+ cache->size != fd_stat->st_size ||
+ !FcCacheTimeValid (cache, dir_stat) ||
+ !FcCacheInsert (cache, fd_stat))
+ {
+ if (allocated)
+ free (cache);
+ else
{
- perror ("lseek");
- free (dir->ent);
- continue;
+#if defined(HAVE_MMAP) || defined(__CYGWIN__)
+ munmap (cache, fd_stat->st_size);
+#elif defined(_WIN32)
+ UnmapViewOfFile (cache);
+#endif
}
- if (dir->metadata.count)
- {
- if (write (fd, dir->ent, dir->metadata.count) != dir->metadata.count)
- {
- perror ("write dirent");
- free (dir->ent);
- continue;
- }
- }
- free (dir->ent);
+ return NULL;
}
- FcCacheWriteString (fd, "");
-
- if (close (fd) == -1)
- goto bail25;
-
- close (fd_orig);
- fd_orig = -1;
-
- 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;
+ /* Mark allocated caches so they're freed rather than unmapped */
+ if (allocated)
+ cache->magic = FC_CACHE_MAGIC_ALLOC;
+
+ return cache;
}
-/*
- * Find the next presumably-mmapable offset after the supplied file
- * position.
- */
-static int
-FcCacheNextOffset(off_t w)
+void
+FcDirCacheReference (FcCache *cache, int nref)
{
- static long pagesize = -1;
- if (pagesize == -1)
- pagesize = sysconf(_SC_PAGESIZE);
- if (w % pagesize == 0)
- return w;
- else
- return ((w / pagesize)+1)*pagesize;
+ FcCacheSkip *skip = FcCacheFindByAddr (cache);
+
+ if (skip)
+ skip->ref += nref;
}
-/* 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)
+void
+FcDirCacheUnload (FcCache *cache)
{
- 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;
-
- 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;
+ FcCacheObjectDereference (cache);
}
-/* 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)
+static FcBool
+FcDirCacheMapHelper (int fd, struct stat *fd_stat, struct stat *dir_stat, void *closure)
{
- char * buf = malloc (8192);
- char candidate_arch_machine_name[MACHINE_SIGNATURE_SIZE + 9];
- long bs;
- int c, bytes_skipped;
- off_t loc;
+ FcCache *cache = FcDirCacheMapFd (fd, fd_stat, dir_stat);
- if (!buf)
+ if (!cache)
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);
+ *((FcCache **) closure) = cache;
return FcTrue;
-
- bail:
- free (buf);
- return FcFalse;
}
-/* 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
-FcDirCacheValid (const FcChar8 *dir)
+FcCache *
+FcDirCacheLoad (const FcChar8 *dir, FcConfig *config, FcChar8 **cache_file)
{
- struct stat file_stat, dir_stat;
- int fd;
-
- if (stat ((char *) dir, &dir_stat) < 0)
- return FcFalse;
-
- fd = FcDirCacheOpen (dir);
-
- if (fd < 0)
- goto bail;
- if (fstat (fd, &file_stat) < 0)
- 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;
-
- return FcTrue;
+ FcCache *cache = NULL;
- bail:
- close (fd);
- return FcFalse;
+ if (!FcDirCacheProcess (config, dir,
+ FcDirCacheMapHelper,
+ &cache, cache_file))
+ return NULL;
+ return cache;
}
-/* Assumes that the cache file in 'dir' exists.
- * Checks that the cache has the appropriate arch section. */
-FcBool
-FcDirCacheHasCurrentArch (const FcChar8 *dir)
+FcCache *
+FcDirCacheLoadFile (const FcChar8 *cache_file, struct stat *file_stat)
{
- int fd;
- off_t current_arch_start;
- char *current_arch_machine_name;
+ int fd;
+ FcCache *cache;
+ struct stat my_file_stat;
- fd = FcDirCacheOpen (dir);
+ if (!file_stat)
+ file_stat = &my_file_stat;
+ fd = FcDirCacheOpenFile (cache_file, file_stat);
if (fd < 0)
- goto bail;
-
- current_arch_machine_name = FcCacheMachineSignature();
- current_arch_start = FcCacheSkipToArch(fd, current_arch_machine_name);
+ return NULL;
+ cache = FcDirCacheMapFd (fd, file_stat, NULL);
close (fd);
+ return cache;
+}
- if (current_arch_start < 0)
- return FcFalse;
-
- return FcTrue;
+/*
+ * Validate a cache file by reading the header and checking
+ * the magic number and the size field
+ */
+static FcBool
+FcDirCacheValidateHelper (int fd, struct stat *fd_stat, struct stat *dir_stat, void *closure)
+{
+ FcBool ret = FcTrue;
+ FcCache c;
+
+ if (read (fd, &c, sizeof (FcCache)) != sizeof (FcCache))
+ ret = FcFalse;
+ else if (c.magic != FC_CACHE_MAGIC_MMAP)
+ ret = FcFalse;
+ else if (c.version < FC_CACHE_CONTENT_VERSION)
+ ret = FcFalse;
+ else if (fd_stat->st_size != c.size)
+ ret = FcFalse;
+ else if (c.mtime != (int) dir_stat->st_mtime)
+ ret = FcFalse;
+ return ret;
+}
- bail:
- return FcFalse;
+static FcBool
+FcDirCacheValidConfig (const FcChar8 *dir, FcConfig *config)
+{
+ return FcDirCacheProcess (config, dir,
+ FcDirCacheValidateHelper,
+ NULL, NULL);
}
FcBool
-FcDirCacheUnlink (const FcChar8 *dir, FcConfig *config)
+FcDirCacheValid (const FcChar8 *dir)
{
- 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;
-
- /* First remove normal cache file. */
- if (stat ((char *) cache_file, &cache_stat) == 0 &&
- unlink ((char *)cache_file) != 0)
- goto bail;
-
- /* 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);
-
- close (fd);
-
- if (stat ((char *) cache_hashed, &cache_stat) == 0 &&
- unlink ((char *)cache_hashed) != 0)
- {
- FcStrFree ((FcChar8 *)cache_hashed);
- goto bail;
- }
+ FcConfig *config;
- FcStrFree ((FcChar8 *)cache_file);
- FcStrFree ((FcChar8 *)cache_hashed);
- return FcTrue;
+ config = FcConfigGetCurrent ();
+ if (!config)
+ return FcFalse;
- bail:
- FcStrFree ((FcChar8 *)cache_file);
- return FcFalse;
+ return FcDirCacheValidConfig (dir, config);
}
-static int
-FcCacheReadDirs (FcConfig * config, FcGlobalCache * cache,
- FcStrList *list, FcFontSet * set, FcStrSet *processed_dirs)
+/*
+ * Build a cache structure from the given contents
+ */
+FcCache *
+FcDirCacheBuild (FcFontSet *set, const FcChar8 *dir, struct stat *dir_stat, FcStrSet *dirs)
{
- int ret = 0;
- FcChar8 *dir;
- FcStrSet *subdirs;
- FcStrList *sublist;
- struct stat statb;
- FcGlobalCacheDir *d;
+ FcSerialize *serialize = FcSerializeCreate ();
+ FcCache *cache;
+ int i;
+ intptr_t cache_offset;
+ intptr_t dirs_offset;
+ FcChar8 *dir_serialize;
+ intptr_t *dirs_serialize;
+ FcFontSet *set_serialize;
+ if (!serialize)
+ return NULL;
/*
- * Read in the results from 'list'.
+ * Space for cache structure
*/
- while ((dir = FcStrListNext (list)))
- {
- if (!FcConfigAcceptFilename (config, dir))
- continue;
-
- /* Skip this directory if already updated
- * to avoid the looped directories via symlinks
- * Clearly a dir not in fonts.conf shouldn't be globally cached.
- */
- dir = (FcChar8 *)FcConfigNormalizeFontDir (config, dir);
- if (!dir)
- continue;
-
- if (FcStrSetMember (processed_dirs, dir))
- continue;
- if (!FcStrSetAdd (processed_dirs, dir))
- continue;
-
- subdirs = FcStrSetCreate ();
- if (!subdirs)
- {
- fprintf (stderr, "Can't create directory set\n");
- ret++;
- 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);
- continue;
- }
- if (stat ((char *) dir, &statb) == -1)
- {
- fprintf (stderr, "\"%s\": ", dir);
- perror ("");
- FcStrSetDestroy (subdirs);
- ret++;
- continue;
- }
- if (!S_ISDIR (statb.st_mode))
- {
- fprintf (stderr, "\"%s\": not a directory, skipping\n", dir);
- FcStrSetDestroy (subdirs);
- continue;
- }
- if (FcDirCacheValid (dir) && FcDirCacheRead (set, subdirs, dir, config))
- {
- /* if an old entry is found in the global cache, disable it */
- if ((d = FcGlobalCacheDirFind (cache, (const char *)dir)) != NULL)
- {
- d->state = FcGCDirDisabled;
- /* save the updated config later without this entry */
- cache->updated = FcTrue;
- }
- }
- else
- {
- 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++;
- continue;
- }
- ret += FcCacheReadDirs (config, cache, sublist, set, processed_dirs);
- }
- FcStrListDone (list);
- return ret;
-}
-
-FcFontSet *
-FcCacheRead (FcConfig *config, FcGlobalCache * cache)
-{
- FcFontSet *s = FcFontSetCreate();
- FcStrSet *processed_dirs;
-
- if (!s)
- return 0;
-
- processed_dirs = FcStrSetCreate();
- if (!processed_dirs)
- goto bail;
-
- if (FcCacheReadDirs (config, cache, FcConfigGetConfigDirs (config), s, processed_dirs))
+ cache_offset = FcSerializeReserve (serialize, sizeof (FcCache));
+ /*
+ * Directory name
+ */
+ if (!FcStrSerializeAlloc (serialize, dir))
goto bail1;
+ /*
+ * Subdirs
+ */
+ dirs_offset = FcSerializeAlloc (serialize, dirs, dirs->num * sizeof (FcChar8 *));
+ for (i = 0; i < dirs->num; i++)
+ if (!FcStrSerializeAlloc (serialize, dirs->strs[i]))
+ goto bail1;
- FcStrSetDestroy (processed_dirs);
- return s;
-
- bail1:
- FcStrSetDestroy (processed_dirs);
- 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' };
+ /*
+ * Patterns
+ */
+ if (!FcFontSetSerializeAlloc (serialize, set))
+ goto bail1;
-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;
+ /* Serialize layout complete. Now allocate space and fill it */
+ cache = malloc (serialize->size);
+ if (!cache)
+ goto bail1;
+ /* shut up valgrind */
+ memset (cache, 0, serialize->size);
- MD5Init (&ctx);
- MD5Update (&ctx, (unsigned char *)cache_file, strlen (cache_file));
+ serialize->linear = cache;
- for (i = 0; i < collisions; i++)
- MD5Update (&ctx, &uscore, 1);
+ cache->magic = FC_CACHE_MAGIC_ALLOC;
+ cache->version = FC_CACHE_CONTENT_VERSION;
+ cache->size = serialize->size;
+ cache->mtime = (int) dir_stat->st_mtime;
- MD5Final (hash, &ctx);
+ /*
+ * Serialize directory name
+ */
+ dir_serialize = FcStrSerialize (serialize, dir);
+ if (!dir_serialize)
+ goto bail2;
+ cache->dir = FcPtrToOffset (cache, dir_serialize);
- for (cnt = 0; cnt < 16; ++cnt)
+ /*
+ * Serialize sub dirs
+ */
+ dirs_serialize = FcSerializePtr (serialize, dirs);
+ if (!dirs_serialize)
+ goto bail2;
+ cache->dirs = FcPtrToOffset (cache, dirs_serialize);
+ cache->dirs_count = dirs->num;
+ for (i = 0; i < dirs->num; i++)
{
- hex_hash[2*cnt] = bin2hex[hash[cnt] >> 4];
- hex_hash[2*cnt+1] = bin2hex[hash[cnt] & 0xf];
+ FcChar8 *d_serialize = FcStrSerialize (serialize, dirs->strs[i]);
+ if (!d_serialize)
+ goto bail2;
+ dirs_serialize[i] = FcPtrToOffset (dirs_serialize, d_serialize);
}
- 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;
+ /*
+ * Serialize font set
+ */
+ set_serialize = FcFontSetSerialize (serialize, set);
+ if (!set_serialize)
+ goto bail2;
+ cache->set = FcPtrToOffset (cache, set_serialize);
- found = FcFalse;
- do
- {
- struct stat c;
- FcChar8 * name_buf_dir;
+ FcSerializeDestroy (serialize);
- 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);
+ FcCacheInsert (cache, NULL);
- 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;
+ return cache;
- bail:
- FcStrFree ((FcChar8 *)cache_file);
- close (fd);
- return -1;
+bail2:
+ free (cache);
+bail1:
+ FcSerializeDestroy (serialize);
+ return NULL;
}
-/* 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;
-
- 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;
-}
+#ifdef _WIN32
+#define mkdir(path,mode) _mkdir(path)
+#endif
static FcBool
-FcDirCacheConsume (int fd, const char * dir, FcFontSet *set, FcConfig *config)
+FcMakeDirectory (const FcChar8 *dir)
{
- FcCache metadata;
- void * current_dir_block;
- off_t pos;
-
- if (read(fd, &metadata, sizeof(FcCache)) != sizeof(FcCache))
- return FcFalse;
- 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;
- }
+ FcChar8 *parent;
+ FcBool ret;
- 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)
+ if (strlen ((char *) dir) == 0)
return FcFalse;
- FcCacheAddBankDir (metadata.bank, dir);
- if (config)
- FcConfigAddFontDir (config, (FcChar8 *)dir);
-
- if (!FcFontSetUnserialize (&metadata, set, current_dir_block))
+ parent = FcStrDirname (dir);
+ if (!parent)
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;
- // 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;
+ if (access ((char *) parent, F_OK) == 0)
+ ret = mkdir ((char *) dir, 0755) == 0 && chmod ((char *) dir, 0755) == 0;
+ else if (access ((char *) parent, F_OK) == -1)
+ ret = FcMakeDirectory (parent) && (mkdir ((char *) dir, 0755) == 0) && chmod ((char *) dir, 0755) == 0;
+ else
+ ret = FcFalse;
+ FcStrFree (parent);
+ return ret;
}
/* write serialized state to the cache file */
FcBool
-FcDirCacheWrite (FcFontSet *set, FcStrSet *dirs, const FcChar8 *dir)
+FcDirCacheWrite (FcCache *cache, FcConfig *config)
{
- char *cache_file;
- char *cache_hashed;
- int fd, fd_orig, i, dirs_count;
+ FcChar8 *dir = FcCacheDir (cache);
+ FcChar8 cache_base[CACHEBASE_LEN];
+ FcChar8 *cache_hashed;
+ int fd;
FcAtomic *atomic;
- FcCache metadata;
- off_t current_arch_start = 0, truncate_to;
- char name_buf[FC_MAX_FILE_LEN];
- int collisions;
+ FcStrList *list;
+ FcChar8 *cache_dir = NULL;
+ FcChar8 *test_dir;
+ FcCacheSkip *skip;
+ struct stat cache_stat;
+ int magic;
+ int written;
- char *current_arch_machine_name, * header;
- void *current_dir_block = 0;
+ /*
+ * Write it to the first directory in the list which is writable
+ */
- dir = FcConfigNormalizeFontDir (FcConfigGetCurrent(), dir);
- if (!dir)
+ list = FcStrListCreate (config->cacheDirs);
+ if (!list)
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))
+ while ((test_dir = FcStrListNext (list))) {
+ if (access ((char *) test_dir, W_OK|X_OK) == 0)
{
- close (fd);
+ cache_dir = test_dir;
break;
}
- close (fd);
-
- if (strcmp (name_buf, cache_file) != 0)
- continue;
- } while (0);
-
- current_dir_block = FcDirCacheProduce (set, &metadata);
+ else
+ {
+ /*
+ * If the directory doesn't exist, try to create it
+ */
+ if (access ((char *) test_dir, F_OK) == -1) {
+ if (FcMakeDirectory (test_dir))
+ {
+ cache_dir = test_dir;
+ break;
+ }
+ }
+ /*
+ * Otherwise, try making it writable
+ */
+ else if (chmod ((char *) test_dir, 0755) == 0)
+ {
+ cache_dir = test_dir;
+ break;
+ }
+ }
+ }
+ FcStrListDone (list);
+ if (!cache_dir)
+ return FcFalse;
- if (metadata.count && !current_dir_block)
- goto bail1;
+ FcDirCacheBasename (dir, cache_base);
+ cache_hashed = FcStrPlus (cache_dir, cache_base);
+ if (!cache_hashed)
+ return FcFalse;
if (FcDebug () & FC_DBG_CACHE)
- printf ("FcDirCacheWriteDir cache_file \"%s\"\n", cache_file);
+ printf ("FcDirCacheWriteDir dir \"%s\" file \"%s\"\n",
+ dir, cache_hashed);
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)
+ fd = open((char *)FcAtomicNewFile (atomic), O_RDWR | O_CREAT | O_BINARY, 0666);
+ if (fd == -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 ++;
+ /* Temporarily switch magic to MMAP while writing to file */
+ magic = cache->magic;
+ if (magic != FC_CACHE_MAGIC_MMAP)
+ cache->magic = FC_CACHE_MAGIC_MMAP;
- /* 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;
+ /*
+ * Write cache contents to file
+ */
+ written = write (fd, cache, cache->size);
- for (i = 0; i < dirs->size; i++)
- FcCacheWriteString (fd, (char *)dirs->strs[i]);
- FcCacheWriteString (fd, "");
+ /* Switch magic back */
+ if (magic != FC_CACHE_MAGIC_MMAP)
+ cache->magic = magic;
- if (write (fd, &metadata, sizeof(FcCache)) != sizeof(FcCache))
+ if (written != cache->size)
{
- perror("write metadata");
+ perror ("write cache");
goto bail5;
}
- if (metadata.count)
- {
- off_t off = FcCacheNextOffset (lseek(fd, 0, SEEK_END));
- if (lseek (fd, off, SEEK_SET) != off)
- perror("lseek");
- else if (write (fd, current_dir_block, metadata.count) !=
- metadata.count)
- perror("write current_dir_block");
- 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);
+ goto bail4;
+
+ /* If the file is small, update the cache chain entry such that the
+ * new cache file is not read again. If it's large, we don't do that
+ * such that we reload it, using mmap, which is shared across processes.
+ */
+ if (cache->size < FC_CACHE_MIN_MMAP &&
+ (skip = FcCacheFindByAddr (cache)) &&
+ FcStat (cache_hashed, &cache_stat))
+ {
+ skip->cache_dev = cache_stat.st_dev;
+ skip->cache_ino = cache_stat.st_ino;
+ skip->cache_mtime = cache_stat.st_mtime;
+ }
+
+ FcStrFree (cache_hashed);
FcAtomicUnlock (atomic);
FcAtomicDestroy (atomic);
return FcTrue;
bail5:
- free (header);
- bail4:
close (fd);
- bail3:
+ bail4:
FcAtomicUnlock (atomic);
- bail2:
+ bail3:
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:
+ FcStrFree (cache_hashed);
return FcFalse;
}
-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;
+/*
+ * Hokey little macro trick to permit the definitions of C functions
+ * with the same name as CPP macros
+ */
+#define args1(x) (x)
+#define args2(x,y) (x,y)
-static FcBool
-FcCacheHaveBank (int bank)
+const FcChar8 *
+FcCacheDir args1(const FcCache *c)
{
- int i;
-
- if (bank < FC_BANK_FIRST)
- return FcTrue;
-
- for (i = 0; i < banks_ptr; i++)
- if (_fcBankId[i] == bank)
- return FcTrue;
-
- return FcFalse;
+ return FcCacheDir (c);
}
-int
-FcCacheBankToIndexMTF (int bank)
+FcFontSet *
+FcCacheCopySet args1(const FcCache *c)
{
- int i, j;
+ FcFontSet *old = FcCacheSet (c);
+ FcFontSet *new = FcFontSetCreate ();
+ int i;
- for (i = 0; i < banks_ptr; i++)
- if (_fcBankId[_fcBankIdx[i]] == bank)
+ if (!new)
+ return NULL;
+ for (i = 0; i < old->nfont; i++)
+ {
+ FcPattern *font = FcFontSetFont (old, i);
+
+ FcPatternReference (font);
+ if (!FcFontSetAdd (new, font))
{
- int t = _fcBankIdx[i];
-
- for (j = i; j > 0; j--)
- _fcBankIdx[j] = _fcBankIdx[j-1];
- _fcBankIdx[0] = t;
- return t;
+ FcFontSetDestroy (new);
+ return NULL;
}
-
- 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;
+ return new;
}
-static void
-FcCacheAddBankDir (int bank, const char * dir)
+const FcChar8 *
+FcCacheSubdir args2(const FcCache *c, int i)
{
- int bi = FcCacheBankToIndexMTF (bank);
-
- if (bi < 0)
- return;
+ return FcCacheSubdir (c, i);
+}
- bankDirs[bi] = (const char *)FcStrCopy ((FcChar8 *)dir);
+int
+FcCacheNumSubdir args1(const FcCache *c)
+{
+ return c->dirs_count;
}
-const char *
-FcCacheFindBankDir (int bank)
+int
+FcCacheNumFont args1(const FcCache *c)
{
- int bi = FcCacheBankToIndex (bank);
- return bankDirs[bi];
+ return FcCacheSet(c)->nfont;
}
/*
* Update context to reflect the concatenation of another buffer full
* of bytes.
*/
-static void MD5Update(struct MD5Context *ctx, unsigned char *buf, unsigned len)
+static void MD5Update(struct MD5Context *ctx, const unsigned char *buf, unsigned len)
{
FcChar32 t;
}
/*
- * Final wrapup - pad to 64-byte boundary with the bit pattern
+ * 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)
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 */
+ memset(ctx, 0, sizeof(*ctx)); /* In case it's sensitive */
}
buf[2] += c;
buf[3] += d;
}
+#define __fccache__
+#include "fcaliastail.h"
+#undef __fccache__
git.wh0rd.org / fontconfig.git / blobdiff