/*
- * $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
*/
#include "fcint.h"
-#include "../fc-arch/fcarch.h"
+#include "fcarch.h"
#include <stdio.h>
#include <fcntl.h>
#include <dirent.h>
#include <string.h>
#include <sys/types.h>
+#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
-#define ENDIAN_TEST 0x12345678
-#define MACHINE_SIGNATURE_SIZE (9 + 5*20 + 1)
-/* for when we don't have sysconf: */
-#define FC_HARDCODED_PAGESIZE 8192
-
#ifndef O_BINARY
#define O_BINARY 0
#endif
-static FILE *
-FcDirCacheOpen (FcConfig *config, const FcChar8 *dir, FcChar8 **cache_path);
-
-static void *
-FcDirCacheProduce (FcFontSet *set, FcCache * metadata);
-
-static off_t
-FcCacheNextOffset(off_t w);
-
-static FcBool
-FcCacheHaveBank (int bank);
-
-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))
-static char *
-FcCacheReadString (FILE *file, char *dest, int len)
-{
- int c;
- char *d = dest;
+#ifdef _WIN32
- if (len == 0)
- return 0;
+#include <windows.h>
- while ((c = getc (file)) != EOF && len > 0) {
- *d++ = c;
- if (c == '\0')
- return dest;
- len--;
- }
- return 0;
-}
-
-static FcBool
-FcCacheWriteString (int fd, const char *chars)
-{
- if (write (fd, chars, strlen(chars)+1) != strlen(chars)+1)
- return FcFalse;
- return FcTrue;
-}
+#ifdef __GNUC__
+typedef long long INT64;
+#define EPOCH_OFFSET 11644473600ll
+#else
+#define EPOCH_OFFSET 11644473600i64
+typedef __int64 INT64;
+#endif
-/*
- * Find the next presumably-mmapable offset after the supplied file
- * position.
+/* 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 off_t
-FcCacheNextOffset(off_t w)
+
+int
+FcStat (const char *file, struct stat *statb)
{
- static long pagesize = -1;
+ WIN32_FILE_ATTRIBUTE_DATA wfad;
+ char full_path_name[MAX_PATH];
+ char *basename;
+ DWORD rc;
- if (w == -1)
- return w;
+ if (!GetFileAttributesEx (file, GetFileExInfoStandard, &wfad))
+ return -1;
- if (pagesize == -1)
-#if defined (HAVE_SYSCONF)
- pagesize = sysconf(_SC_PAGESIZE);
-#else
- pagesize = FC_HARDCODED_PAGESIZE;
-#endif
- if (w % pagesize == 0)
- return w;
+ statb->st_dev = 0;
+
+ /* 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;
+
+ 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
- return ((w / pagesize)+1)*pagesize;
-}
+ statb->st_mode |= _S_IFREG;
-/* Does not check that the cache has the appropriate arch section. */
-FcBool
-FcDirCacheValid (const FcChar8 *dir, FcConfig *config)
-{
- FILE *file;
+ statb->st_nlink = 1;
+ statb->st_uid = statb->st_gid = 0;
+ statb->st_rdev = 0;
- file = FcDirCacheOpen (config, dir, NULL);
+ if (wfad.nFileSizeHigh > 0)
+ return -1;
+ statb->st_size = wfad.nFileSizeLow;
- if (file != NULL)
- return FcFalse;
- fclose (file);
+ 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 FcTrue;
+ return 0;
}
-#define CACHEBASE_LEN (1 + 32 + 1 + sizeof (FC_ARCHITECTURE) + sizeof (FC_CACHE_SUFFIX))
+#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',
struct MD5Context ctx;
MD5Init (&ctx);
- MD5Update (&ctx, (unsigned char *)dir, strlen ((char *) dir));
+ MD5Update (&ctx, (const unsigned char *)dir, strlen ((const char *) dir));
MD5Final (hash, &ctx);
if (!cache_hashed)
break;
(void) unlink ((char *) cache_hashed);
+ FcStrFree (cache_hashed);
}
FcStrListDone (list);
/* return FcFalse if something went wrong */
}
static int
-FcCacheReadDirs (FcConfig * config,
- FcStrList *list, FcFontSet * set, FcStrSet *processed_dirs)
+FcDirCacheOpenFile (const FcChar8 *cache_file, struct stat *file_stat)
{
- int ret = 0;
- FcChar8 *dir;
- FcStrSet *subdirs;
- FcStrList *sublist;
+ int fd;
- /*
- * Read in the results from 'list'.
- */
- while ((dir = FcStrListNext (list)))
+#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)
{
- 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.
- */
-
- 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;
- }
-
- FcDirScanConfig (set, subdirs,
- config->blanks, dir, FcFalse, config);
-
- sublist = FcStrListCreate (subdirs);
- FcStrSetDestroy (subdirs);
- if (!sublist)
- {
- fprintf (stderr, "Can't create subdir list in \"%s\"\n", dir);
- ret++;
- continue;
- }
- ret += FcCacheReadDirs (config, sublist, set, processed_dirs);
+ close (fd);
+ return -1;
}
- FcStrListDone (list);
- return ret;
-}
-
-FcFontSet *
-FcCacheRead (FcConfig *config)
-{
- FcFontSet *s = FcFontSetCreate();
- FcStrSet *processed_dirs;
-
- if (!s)
- return 0;
-
- processed_dirs = FcStrSetCreate();
- if (!processed_dirs)
- goto bail;
-
- if (FcCacheReadDirs (config, FcConfigGetConfigDirs (config), s, processed_dirs))
- goto bail1;
-
- FcStrSetDestroy (processed_dirs);
- return s;
-
- bail1:
- FcStrSetDestroy (processed_dirs);
- bail:
- FcFontSetDestroy (s);
- return 0;
+#endif
+ return fd;
}
-/* Opens the cache file for 'dir' for reading.
- * This searches the list of cache dirs for the relevant cache file,
- * returning the first one found.
+/*
+ * Look for a cache file for the specified dir. Attempt
+ * to use each one we find, stopping when the callback
+ * indicates success
*/
-static FILE *
-FcDirCacheOpen (FcConfig *config, const FcChar8 *dir, FcChar8 **cache_path)
+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)
{
- FILE *file = NULL;
- FcChar8 *cache_hashed = NULL;
+ int fd = -1;
FcChar8 cache_base[CACHEBASE_LEN];
FcStrList *list;
FcChar8 *cache_dir;
struct stat file_stat, dir_stat;
+ FcBool ret = FcFalse;
- if (stat ((char *) dir, &dir_stat) < 0)
- return NULL;
+ if (FcStat (dir, &dir_stat) < 0)
+ return FcFalse;
FcDirCacheBasename (dir, cache_base);
list = FcStrListCreate (config->cacheDirs);
if (!list)
- return NULL;
+ return FcFalse;
while ((cache_dir = FcStrListNext (list)))
{
- cache_hashed = FcStrPlus (cache_dir, cache_base);
+ FcChar8 *cache_hashed = FcStrPlus (cache_dir, cache_base);
if (!cache_hashed)
break;
- file = fopen((char *) cache_hashed, "rb");
- if (file != NULL) {
- if (fstat (fileno (file), &file_stat) >= 0 &&
- dir_stat.st_mtime <= file_stat.st_mtime)
+ fd = FcDirCacheOpenFile (cache_hashed, &file_stat);
+ if (fd >= 0) {
+ ret = (*callback) (fd, &file_stat, &dir_stat, closure);
+ close (fd);
+ if (ret)
{
+ if (cache_file_ret)
+ *cache_file_ret = cache_hashed;
+ else
+ FcStrFree (cache_hashed);
break;
}
- fclose (file);
- file = NULL;
}
- FcStrFree (cache_hashed);
- cache_hashed = NULL;
+ FcStrFree (cache_hashed);
}
FcStrListDone (list);
- if (file == NULL)
- return NULL;
-
- if (cache_path)
- *cache_path = cache_hashed;
+ return ret;
+}
+
+#define FC_CACHE_MIN_MMAP 1024
+
+/*
+ * 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
+ */
+
+typedef struct _FcCacheSkip FcCacheSkip;
+
+struct _FcCacheSkip {
+ FcCache *cache;
+ int ref;
+ intptr_t size;
+ dev_t cache_dev;
+ ino_t cache_ino;
+ time_t cache_mtime;
+ FcCacheSkip *next[1];
+};
+
+/*
+ * The head of the skip list; pointers for every possible level
+ * in the skip list, plus the largest level in the list
+ */
+
+#define FC_CACHE_MAX_LEVEL 16
+
+static FcCacheSkip *fcCacheChains[FC_CACHE_MAX_LEVEL];
+static int fcCacheMaxLevel;
+
+#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;
+}
+
+/*
+ * Insert cache into the list
+ */
+static FcBool
+FcCacheInsert (FcCache *cache, struct stat *cache_stat)
+{
+ FcCacheSkip **update[FC_CACHE_MAX_LEVEL];
+ FcCacheSkip *s, **next;
+ int i, level;
+
+ /*
+ * Find links along each chain
+ */
+ next = fcCacheChains;
+ for (i = fcCacheMaxLevel; --i >= 0; )
+ {
+ for (; (s = next[i]); next = s->next)
+ if (s->cache > cache)
+ break;
+ update[i] = &next[i];
+ }
+
+ /*
+ * Create new list element
+ */
+ level = random_level ();
+ if (level > fcCacheMaxLevel)
+ {
+ level = fcCacheMaxLevel + 1;
+ update[fcCacheMaxLevel] = &fcCacheChains[fcCacheMaxLevel];
+ fcCacheMaxLevel = level;
+ }
+
+ s = malloc (sizeof (FcCacheSkip) + (level - 1) * sizeof (FcCacheSkip *));
+ if (!s)
+ return FcFalse;
+
+ 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
- FcStrFree (cache_hashed);
+ {
+ s->cache_dev = 0;
+ s->cache_ino = 0;
+ s->cache_mtime = 0;
+ }
+
+ /*
+ * Insert into all fcCacheChains
+ */
+ for (i = 0; i < level; i++)
+ {
+ s->next[i] = *update[i];
+ *update[i] = s;
+ }
+ return FcTrue;
+}
+
+static FcCacheSkip *
+FcCacheFindByAddr (void *object)
+{
+ int i;
+ FcCacheSkip **next = fcCacheChains;
+ FcCacheSkip *s;
- return file;
+ /*
+ * 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;
}
-/* read serialized state from the cache file */
-FcBool
-FcDirCacheRead (FcFontSet * set, FcStrSet * dirs,
- const FcChar8 *dir, FcConfig *config)
+static void
+FcCacheRemove (FcCache *cache)
{
- FILE *file;
- FcCache metadata;
- void *current_dir_block;
- char subdir_name[FC_MAX_FILE_LEN + 1 + 12 + 1];
+ FcCacheSkip **update[FC_CACHE_MAX_LEVEL];
+ FcCacheSkip *s, **next;
+ int i;
- file = FcDirCacheOpen (config, dir, NULL);
- if (file == NULL)
- goto bail;
+ /*
+ * Find links along each chain
+ */
+ next = fcCacheChains;
+ for (i = fcCacheMaxLevel; --i >= 0; )
+ {
+ 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);
+}
- if (fread(&metadata, sizeof(FcCache), 1, file) != 1)
- goto bail1;
- if (metadata.magic != FC_CACHE_MAGIC)
- goto bail1;
+static FcCache *
+FcCacheFindByStat (struct stat *cache_stat)
+{
+ FcCacheSkip *s;
- while (FcCacheReadString (file, subdir_name, sizeof (subdir_name)) &&
- strlen (subdir_name) > 0)
- FcStrSetAdd (dirs, (FcChar8 *)subdir_name);
+ 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;
+}
- if (metadata.count)
+static void
+FcDirCacheDispose (FcCache *cache)
+{
+ 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
+ break;
+ }
+ FcCacheRemove (cache);
+}
+
+void
+FcCacheObjectReference (void *object)
+{
+ FcCacheSkip *skip = FcCacheFindByAddr (object);
+
+ if (skip)
+ skip->ref++;
+}
+
+void
+FcCacheObjectDereference (void *object)
+{
+ FcCacheSkip *skip = FcCacheFindByAddr (object);
+
+ if (skip)
+ {
+ skip->ref--;
+ if (skip->ref <= 0)
+ FcDirCacheDispose (skip->cache);
+ }
+}
+
+void
+FcCacheFini (void)
+{
+ int i;
+
+ for (i = 0; i < FC_CACHE_MAX_LEVEL; i++)
+ assert (fcCacheChains[i] == NULL);
+ assert (fcCacheMaxLevel == 0);
+}
+
+static FcBool
+FcCacheTimeValid (FcCache *cache, struct stat *dir_stat)
+{
+ struct stat dir_static;
+
+ if (!dir_stat)
+ {
+ if (FcStat (FcCacheDir (cache), &dir_static) < 0)
+ return FcFalse;
+ dir_stat = &dir_static;
+ }
+ 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;
+}
+
+/*
+ * 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;
+ }
+
+ /*
+ * 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)
{
- int fd = fileno (file);
#if defined(HAVE_MMAP) || defined(__CYGWIN__)
- current_dir_block = mmap (0, metadata.count,
- PROT_READ, MAP_SHARED, fd, metadata.pos);
- if (current_dir_block == MAP_FAILED)
- goto bail1;
+ cache = mmap (0, fd_stat->st_size, PROT_READ, MAP_SHARED, fd, 0);
+ if (cache == MAP_FAILED)
+ cache = NULL;
#elif defined(_WIN32)
{
HANDLE hFileMap;
- hFileMap = CreateFileMapping((HANDLE) _get_osfhandle(fd), NULL, PAGE_READONLY, 0, 0, NULL);
- if (hFileMap == NULL)
- goto bail1;
-
- current_dir_block = MapViewOfFile (hFileMap, FILE_MAP_READ, 0, metadata.pos, metadata.count);
- if (current_dir_block == NULL)
+ cache = NULL;
+ hFileMap = CreateFileMapping((HANDLE) _get_osfhandle(fd), NULL,
+ PAGE_READONLY, 0, 0, NULL);
+ if (hFileMap != NULL)
{
+ cache = MapViewOfFile (hFileMap, FILE_MAP_READ, 0, 0,
+ fd_stat->st_size);
CloseHandle (hFileMap);
- goto bail1;
}
}
-#else
- if (lseek (fd, metatdata.pos, SEEK_SET) == -1)
- goto bail1;
-
- current_dir_block = malloc (metadata.count);
- if (!current_dir_block)
- goto bail1;
+#endif
+ }
+ if (!cache)
+ {
+ cache = malloc (fd_stat->st_size);
+ if (!cache)
+ return NULL;
- /* could also use CreateMappedViewOfFile under MinGW... */
- if (read (fd, current_dir_block, metadata.count) != metadata.count)
+ if (read (fd, cache, fd_stat->st_size) != fd_stat->st_size)
{
- free (current_dir_block);
- goto bail1;
+ free (cache);
+ return NULL;
}
+ 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
+ {
+#if defined(HAVE_MMAP) || defined(__CYGWIN__)
+ munmap (cache, fd_stat->st_size);
+#elif defined(_WIN32)
+ UnmapViewOfFile (cache);
#endif
- FcCacheAddBankDir (metadata.bank, (char *) dir);
- if (!FcFontSetUnserialize (&metadata, set, current_dir_block))
- goto bail1;
+ }
+ return NULL;
}
- if (config)
- FcConfigAddFontDir (config, (FcChar8 *)dir);
- fclose(file);
+ /* Mark allocated caches so they're freed rather than unmapped */
+ if (allocated)
+ cache->magic = FC_CACHE_MAGIC_ALLOC;
+
+ return cache;
+}
+
+void
+FcDirCacheReference (FcCache *cache, int nref)
+{
+ FcCacheSkip *skip = FcCacheFindByAddr (cache);
+
+ if (skip)
+ skip->ref += nref;
+}
+
+void
+FcDirCacheUnload (FcCache *cache)
+{
+ FcCacheObjectDereference (cache);
+}
+
+static FcBool
+FcDirCacheMapHelper (int fd, struct stat *fd_stat, struct stat *dir_stat, void *closure)
+{
+ FcCache *cache = FcDirCacheMapFd (fd, fd_stat, dir_stat);
+
+ if (!cache)
+ return FcFalse;
+ *((FcCache **) closure) = cache;
return FcTrue;
+}
- bail1:
- fclose (file);
- bail:
- return FcFalse;
+FcCache *
+FcDirCacheLoad (const FcChar8 *dir, FcConfig *config, FcChar8 **cache_file)
+{
+ FcCache *cache = NULL;
+
+ if (!FcDirCacheProcess (config, dir,
+ FcDirCacheMapHelper,
+ &cache, cache_file))
+ return NULL;
+ return cache;
}
-static void *
-FcDirCacheProduce (FcFontSet *set, FcCache *metadata)
+FcCache *
+FcDirCacheLoadFile (const FcChar8 *cache_file, struct stat *file_stat)
{
- void * current_dir_block, * final_dir_block;
- static unsigned int rand_state = 0;
- int bank, needed_bytes_no_align;
+ int fd;
+ FcCache *cache;
+ struct stat my_file_stat;
+
+ if (!file_stat)
+ file_stat = &my_file_stat;
+ fd = FcDirCacheOpenFile (cache_file, file_stat);
+ if (fd < 0)
+ return NULL;
+ cache = FcDirCacheMapFd (fd, file_stat, NULL);
+ close (fd);
+ return cache;
+}
-#if defined (HAVE_RAND_R)
- if (!rand_state)
- rand_state = time(0L);
- bank = rand_r(&rand_state);
+/*
+ * 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;
- while (FcCacheHaveBank(bank))
- bank = rand_r(&rand_state);
-#else
- if (!rand_state)
- {
- rand_state = 1;
- srand (time (0L));
- }
- bank = rand();
+ 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;
+}
- while (FcCacheHaveBank(bank))
- bank = rand();
-#endif
+static FcBool
+FcDirCacheValidConfig (const FcChar8 *dir, FcConfig *config)
+{
+ return FcDirCacheProcess (config, dir,
+ FcDirCacheValidateHelper,
+ NULL, NULL);
+}
+
+FcBool
+FcDirCacheValid (const FcChar8 *dir)
+{
+ FcConfig *config;
+
+ config = FcConfigGetCurrent ();
+ if (!config)
+ return FcFalse;
+
+ return FcDirCacheValidConfig (dir, config);
+}
+
+/*
+ * Build a cache structure from the given contents
+ */
+FcCache *
+FcDirCacheBuild (FcFontSet *set, const FcChar8 *dir, struct stat *dir_stat, FcStrSet *dirs)
+{
+ 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;
- 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 (!serialize)
+ return NULL;
+ /*
+ * Space for cache structure
+ */
+ cache_offset = FcSerializeReserve (serialize, sizeof (FcCache));
+ /*
+ * Directory name
+ */
+ if (!FcStrSerializeAlloc (serialize, dir))
+ goto bail1;
+ /*
+ * Subdirs
+ */
+ dirs_offset = FcSerializeAlloc (serialize, dirs, dirs->num * sizeof (FcChar8 *));
+ for (i = 0; i < dirs->num; i++)
+ if (!FcStrSerializeAlloc (serialize, dirs->strs[i]))
+ goto bail1;
- if (!needed_bytes_no_align) /* not a failure, no fonts to write */
+ /*
+ * Patterns
+ */
+ if (!FcFontSetSerializeAlloc (serialize, set))
+ goto bail1;
+
+ /* Serialize layout complete. Now allocate space and fill it */
+ cache = malloc (serialize->size);
+ if (!cache)
+ goto bail1;
+ /* shut up valgrind */
+ memset (cache, 0, serialize->size);
+
+ serialize->linear = cache;
+
+ cache->magic = FC_CACHE_MAGIC_ALLOC;
+ cache->version = FC_CACHE_CONTENT_VERSION;
+ cache->size = serialize->size;
+ cache->mtime = (int) dir_stat->st_mtime;
+
+ /*
+ * Serialize directory name
+ */
+ dir_serialize = FcStrSerialize (serialize, dir);
+ if (!dir_serialize)
+ goto bail2;
+ cache->dir = FcPtrToOffset (cache, dir_serialize);
+
+ /*
+ * Serialize sub dirs
+ */
+ dirs_serialize = FcSerializePtr (serialize, dirs);
+ if (!dirs_serialize)
+ goto bail2;
+ cache->dirs = FcPtrToOffset (cache, dirs_serialize);
+ cache->dirs_count = dirs->num;
+ for (i = 0; i < dirs->num; i++)
{
- /* no, you don't really need to write any bytes at all. */
- metadata->count = 0;
- return 0;
+ FcChar8 *d_serialize = FcStrSerialize (serialize, dirs->strs[i]);
+ if (!d_serialize)
+ goto bail2;
+ dirs_serialize[i] = FcPtrToOffset (dirs_serialize, d_serialize);
}
- 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);
+ /*
+ * Serialize font set
+ */
+ set_serialize = FcFontSetSerialize (serialize, set);
+ if (!set_serialize)
+ goto bail2;
+ cache->set = FcPtrToOffset (cache, set_serialize);
- if ((void *)((char *)current_dir_block+metadata->count) < final_dir_block)
- goto bail;
-
- if (!FcFontSetSerialize (bank, set))
- goto bail;
+ FcSerializeDestroy (serialize);
- return current_dir_block;
+ FcCacheInsert (cache, NULL);
- bail:
- free (current_dir_block);
- return 0;
+ return cache;
+
+bail2:
+ free (cache);
+bail1:
+ FcSerializeDestroy (serialize);
+ return NULL;
}
+
+#ifdef _WIN32
+#define mkdir(path,mode) _mkdir(path)
+#endif
+
static FcBool
FcMakeDirectory (const FcChar8 *dir)
{
FcChar8 *parent;
FcBool ret;
-
+
if (strlen ((char *) dir) == 0)
return FcFalse;
-
+
parent = FcStrDirname (dir);
if (!parent)
return FcFalse;
- if (access ((char *) parent, W_OK|X_OK) == 0)
- ret = mkdir ((char *) dir, 0777) == 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, 0777) == 0);
+ ret = FcMakeDirectory (parent) && (mkdir ((char *) dir, 0755) == 0) && chmod ((char *) dir, 0755) == 0;
else
ret = FcFalse;
FcStrFree (parent);
/* write serialized state to the cache file */
FcBool
-FcDirCacheWrite (FcFontSet *set, FcStrSet *dirs, const FcChar8 *dir, FcConfig *config)
+FcDirCacheWrite (FcCache *cache, FcConfig *config)
{
+ FcChar8 *dir = FcCacheDir (cache);
FcChar8 cache_base[CACHEBASE_LEN];
FcChar8 *cache_hashed;
- int fd, i;
+ int fd;
FcAtomic *atomic;
- FcCache metadata;
- void *current_dir_block = 0;
FcStrList *list;
FcChar8 *cache_dir = NULL;
FcChar8 *test_dir;
- off_t header_len;
+ FcCacheSkip *skip;
+ struct stat cache_stat;
+ int magic;
+ int written;
/*
* Write it to the first directory in the list which is writable
*/
-
+
list = FcStrListCreate (config->cacheDirs);
if (!list)
return FcFalse;
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;
+
FcDirCacheBasename (dir, cache_base);
cache_hashed = FcStrPlus (cache_dir, cache_base);
if (!cache_hashed)
return FcFalse;
- current_dir_block = FcDirCacheProduce (set, &metadata);
-
- if (metadata.count && !current_dir_block)
- goto bail1;
-
if (FcDebug () & FC_DBG_CACHE)
printf ("FcDirCacheWriteDir dir \"%s\" file \"%s\"\n",
dir, cache_hashed);
goto bail1;
if (!FcAtomicLock (atomic))
- goto bail2;
+ goto bail3;
fd = open((char *)FcAtomicNewFile (atomic), O_RDWR | O_CREAT | O_BINARY, 0666);
if (fd == -1)
- goto bail3;
-
- /*
- * Compute file header length -- the FcCache followed by the subdir names
- */
- header_len = sizeof (FcCache);
- for (i = 0; i < dirs->size; i++)
- header_len += strlen ((char *)dirs->strs[i]) + 1;
-
- metadata.pos = FcCacheNextOffset (lseek (fd, 0, SEEK_CUR) + header_len);
- metadata.subdirs = dirs->size;
-
+ goto bail4;
+
+ /* Temporarily switch magic to MMAP while writing to file */
+ magic = cache->magic;
+ if (magic != FC_CACHE_MAGIC_MMAP)
+ cache->magic = FC_CACHE_MAGIC_MMAP;
+
/*
- * Write out the header
+ * Write cache contents to file
*/
- if (write (fd, &metadata, sizeof(FcCache)) != sizeof(FcCache))
+ written = write (fd, cache, cache->size);
+
+ /* Switch magic back */
+ if (magic != FC_CACHE_MAGIC_MMAP)
+ cache->magic = magic;
+
+ if (written != cache->size)
{
- perror("write metadata");
+ perror ("write cache");
goto bail5;
}
-
- for (i = 0; i < dirs->size; i++)
- FcCacheWriteString (fd, (char *)dirs->strs[i]);
- if (metadata.count)
+ close(fd);
+ if (!FcAtomicReplaceOrig(atomic))
+ 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))
{
- if (lseek (fd, metadata.pos, SEEK_SET) != metadata.pos)
- perror("lseek");
- else if (write (fd, current_dir_block, metadata.count) !=
- metadata.count)
- perror("write current_dir_block");
- free (current_dir_block);
- current_dir_block = 0;
+ skip->cache_dev = cache_stat.st_dev;
+ skip->cache_ino = cache_stat.st_ino;
+ skip->cache_mtime = cache_stat.st_mtime;
}
- close(fd);
- if (!FcAtomicReplaceOrig(atomic))
- goto bail3;
- FcStrFree ((FcChar8 *)cache_hashed);
+ FcStrFree (cache_hashed);
FcAtomicUnlock (atomic);
FcAtomicDestroy (atomic);
return FcTrue;
bail5:
close (fd);
- bail3:
+ bail4:
FcAtomicUnlock (atomic);
- bail2:
+ bail3:
FcAtomicDestroy (atomic);
bail1:
- FcStrFree ((FcChar8 *)cache_hashed);
- if (current_dir_block)
- free (current_dir_block);
+ FcStrFree (cache_hashed);
return FcFalse;
}
-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