/*
- * $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
*
* PERFORMANCE OF THIS SOFTWARE.
*/
+#include "fcint.h"
+#include "../fc-arch/fcarch.h"
+#include <stdio.h>
#include <fcntl.h>
#include <dirent.h>
-#include <sys/mman.h>
-#include <sys/utsname.h>
+#include <string.h>
#include <sys/types.h>
-#include <unistd.h>
-#include "fcint.h"
-#include <unistd.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
+#ifndef O_BINARY
+#define O_BINARY 0
+#endif
-static off_t
-FcCacheSkipToArch (int fd, const char * arch);
+struct MD5Context {
+ FcChar32 buf[4];
+ FcChar32 bits[2];
+ unsigned char in[64];
+};
-static FcBool
-FcCacheCopyOld (int fd, int fd_orig, off_t start);
+static void MD5Init(struct MD5Context *ctx);
+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]);
-static void *
-FcDirCacheProduce (FcFontSet *set, FcCache * metadata);
+#define CACHEBASE_LEN (1 + 32 + 1 + sizeof (FC_ARCHITECTURE) + sizeof (FC_CACHE_SUFFIX))
-static FcBool
-FcDirCacheConsume (int fd, const char * dir, FcFontSet *set);
+#ifdef _WIN32
-FcBool
-FcDirCacheRead (FcFontSet * set, FcStrSet * dirs, const FcChar8 *dir);
+#include <windows.h>
-static int
-FcCacheNextOffset(off_t w);
-
-static char *
-FcCacheMachineSignature (void);
+#ifdef __GNUC__
+typedef long long INT64;
+#define EPOCH_OFFSET 11644473600ll
+#else
+#define EPOCH_OFFSET 11644473600i64
+typedef __int64 INT64;
+#endif
-static FcBool
-FcCacheHaveBank (int bank);
+/* 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 void
-FcCacheAddBankDir (int bank, const char * dir);
+int
+FcStat (const char *file, struct stat *statb)
+{
+ WIN32_FILE_ATTRIBUTE_DATA wfad;
+ char full_path_name[MAX_PATH];
+ char *basename;
+ DWORD rc;
+
+ if (!GetFileAttributesEx (file, GetFileExInfoStandard, &wfad))
+ return -1;
+
+ statb->st_dev = 0;
-#define FC_DBG_CACHE_REF 1024
+ /* 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;
-static char *
-FcCacheReadString (int fd, char *dest, int len)
-{
- FcChar8 c;
- FcBool escape;
- int size;
- int i;
+ 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 (len == 0)
- return 0;
+ 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;
- 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;
}
+#endif
-static FcBool
-FcCacheWriteString (int fd, const char *chars)
-{
- if (write (fd, chars, strlen(chars)+1) != strlen(chars)+1)
- return FcFalse;
- return FcTrue;
-}
-
-static void
-FcGlobalCacheDirDestroy (FcGlobalCacheDir *d)
-{
- FcMemFree (FC_MEM_STRING, strlen (d->name)+1);
- free (d->name);
- FcMemFree (FC_MEM_CACHE, sizeof (FcGlobalCacheDir));
- free (d);
-}
+static const char bin2hex[] = { '0', '1', '2', '3',
+ '4', '5', '6', '7',
+ '8', '9', 'a', 'b',
+ 'c', 'd', 'e', 'f' };
-FcGlobalCache *
-FcGlobalCacheCreate (void)
+static FcChar8 *
+FcDirCacheBasename (const FcChar8 * dir, FcChar8 cache_base[CACHEBASE_LEN])
{
- FcGlobalCache *cache;
+ unsigned char hash[16];
+ FcChar8 *hex_hash;
+ int cnt;
+ struct MD5Context ctx;
- 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;
-}
+ MD5Init (&ctx);
+ MD5Update (&ctx, (const unsigned char *)dir, strlen ((const char *) dir));
-void
-FcGlobalCacheDestroy (FcGlobalCache *cache)
-{
- FcGlobalCacheDir *d, *next;
+ MD5Final (hash, &ctx);
- for (d = cache->dirs; d; d = next)
+ cache_base[0] = '/';
+ hex_hash = cache_base + 1;
+ for (cnt = 0; cnt < 16; ++cnt)
{
- next = d->next;
- FcGlobalCacheDirDestroy (d);
+ hex_hash[2*cnt ] = bin2hex[hash[cnt] >> 4];
+ hex_hash[2*cnt+1] = bin2hex[hash[cnt] & 0xf];
}
- FcMemFree (FC_MEM_CACHE, sizeof (FcGlobalCache));
- free (cache);
+ hex_hash[2*cnt] = 0;
+ strcat ((char *) cache_base, "-" FC_ARCHITECTURE FC_CACHE_SUFFIX);
+
+ return cache_base;
}
-void
-FcGlobalCacheLoad (FcGlobalCache *cache,
- FcStrSet *staleDirs,
- const FcChar8 *cache_file,
- FcConfig *config)
+FcBool
+FcDirCacheUnlink (const FcChar8 *dir, FcConfig *config)
{
- char name_buf[8192];
- FcGlobalCacheDir *d, *next;
- FcFileTime config_time = FcConfigModifiedTime (config);
- char * current_arch_machine_name;
- char candidate_arch_machine_name[MACHINE_SIGNATURE_SIZE + 9];
- off_t current_arch_start;
-
- struct stat cache_stat, dir_stat;
-
- if (stat ((char *) cache_file, &cache_stat) < 0)
- return;
-
- cache->fd = open ((char *) cache_file, O_RDONLY);
- if (cache->fd == -1)
- return;
+ FcChar8 *cache_hashed = NULL;
+ FcChar8 cache_base[CACHEBASE_LEN];
+ FcStrList *list;
+ FcChar8 *cache_dir;
- cache->updated = FcFalse;
+ FcDirCacheBasename (dir, cache_base);
- current_arch_machine_name = FcCacheMachineSignature ();
- current_arch_start = FcCacheSkipToArch(cache->fd,
- current_arch_machine_name);
- if (current_arch_start < 0)
- goto bail_and_destroy;
+ 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;
+}
- lseek (cache->fd, current_arch_start, SEEK_SET);
- FcCacheReadString (cache->fd, candidate_arch_machine_name,
- sizeof (candidate_arch_machine_name));
- if (strlen(candidate_arch_machine_name) == 0)
- goto bail_and_destroy;
+static int
+FcDirCacheOpenFile (const FcChar8 *cache_file, struct stat *file_stat)
+{
+ int fd;
- while (1)
+#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)
{
- off_t targ;
-
- FcCacheReadString (cache->fd, name_buf, sizeof (name_buf));
- if (!strlen(name_buf))
- break;
+ close (fd);
+ return -1;
+ }
+#endif
+ return fd;
+}
- /* Directory must be older than the global cache file; also
- cache must be newer than the config file. */
- if (stat ((char *) name_buf, &dir_stat) < 0 ||
- dir_stat.st_mtime > cache_stat.st_mtime ||
- (config_time.set && cache_stat.st_mtime < config_time.time))
- {
- FcCache md;
-
- FcStrSetAdd (staleDirs, FcStrCopy ((FcChar8 *)name_buf));
- read (cache->fd, &md, sizeof (FcCache));
- lseek (cache->fd, FcCacheNextOffset (lseek(cache->fd, 0, SEEK_CUR)) + md.count, SEEK_SET);
- continue;
- }
-
- d = malloc (sizeof (FcGlobalCacheDir));
- if (!d)
- goto bail1;
+/*
+ * 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)
+{
+ int fd = -1;
+ FcChar8 cache_base[CACHEBASE_LEN];
+ FcStrList *list;
+ FcChar8 *cache_dir;
+ struct stat file_stat, dir_stat;
+ FcBool ret = FcFalse;
- d->next = cache->dirs;
- cache->dirs = d;
+ if (FcStat ((char *) dir, &dir_stat) < 0)
+ return FcFalse;
- d->name = (char *)FcStrCopy ((FcChar8 *)name_buf);
- d->ent = 0;
- d->offset = lseek (cache->fd, 0, SEEK_CUR);
- if (read (cache->fd, &d->metadata, sizeof (FcCache)) != sizeof (FcCache))
- goto bail1;
- targ = FcCacheNextOffset (lseek(cache->fd, 0, SEEK_CUR)) + d->metadata.count;
- if (lseek (cache->fd, targ, SEEK_SET) != targ)
- goto bail1;
- }
- return;
+ FcDirCacheBasename (dir, cache_base);
- bail1:
- for (d = cache->dirs; d; d = next)
+ list = FcStrListCreate (config->cacheDirs);
+ if (!list)
+ return FcFalse;
+
+ while ((cache_dir = FcStrListNext (list)))
{
- next = d->next;
- free (d);
+ 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)
+ {
+ if (cache_file_ret)
+ *cache_file_ret = cache_hashed;
+ else
+ FcStrFree (cache_hashed);
+ break;
+ }
+ }
+ FcStrFree (cache_hashed);
}
- cache->dirs = 0;
+ FcStrListDone (list);
+
+ return ret;
+}
- close (cache->fd);
- cache->fd = -1;
- return;
+#define FC_CACHE_MIN_MMAP 1024
- bail_and_destroy:
- close (cache->fd);
- cache->fd = -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
+ */
- if (stat ((char *) cache_file, &cache_stat) == 0)
- unlink ((char *)cache_file);
+typedef struct _FcCacheSkip FcCacheSkip;
- return;
+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
+ */
-FcBool
-FcGlobalCacheReadDir (FcFontSet *set, FcStrSet *dirs, FcGlobalCache * cache, const char *dir, FcConfig *config)
+#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)
{
- FcGlobalCacheDir *d;
- FcBool ret = FcFalse;
-
- if (cache->fd == -1)
- return FcFalse;
+ /* tricky bit -- each bit is '1' 75% of the time */
+ long int bits = FcRandom () | FcRandom ();
+ int level = 0;
- for (d = cache->dirs; d; d = d->next)
+ while (++level < FC_CACHE_MAX_LEVEL)
{
- if (strncmp (d->name, dir, strlen(dir)) == 0)
- {
- lseek (cache->fd, d->offset, SEEK_SET);
- if (!FcDirCacheConsume (cache->fd, dir, set))
- return FcFalse;
- if (strcmp (d->name, dir) == 0)
- ret = FcTrue;
- }
+ if (bits & 1)
+ break;
+ bits >>= 1;
}
-
- return ret;
+ return level;
}
-FcBool
-FcGlobalCacheUpdate (FcGlobalCache *cache,
- const char *name,
- FcFontSet *set)
+/*
+ * Insert cache into the list
+ */
+static FcBool
+FcCacheInsert (FcCache *cache, struct stat *cache_stat)
{
- FcGlobalCacheDir * d;
+ FcCacheSkip **update[FC_CACHE_MAX_LEVEL];
+ FcCacheSkip *s, **next;
+ int i, level;
- if (!set->nfont)
- return FcTrue;
-
- for (d = cache->dirs; d; d = d->next)
+ /*
+ * Find links along each chain
+ */
+ next = fcCacheChains;
+ for (i = fcCacheMaxLevel; --i >= 0; )
{
- if (strcmp(d->name, name) == 0)
- break;
+ for (; (s = next[i]); next = s->next)
+ if (s->cache > cache)
+ break;
+ update[i] = &next[i];
}
- if (!d)
+ /*
+ * Create new list element
+ */
+ level = random_level ();
+ if (level > fcCacheMaxLevel)
{
- d = malloc (sizeof (FcGlobalCacheDir));
- if (!d)
- return FcFalse;
- d->next = cache->dirs;
- cache->dirs = d;
+ level = fcCacheMaxLevel + 1;
+ update[fcCacheMaxLevel] = &fcCacheChains[fcCacheMaxLevel];
+ fcCacheMaxLevel = level;
}
-
- cache->updated = FcTrue;
-
- d->name = (char *)FcStrCopy ((FcChar8 *)name);
- d->ent = FcDirCacheProduce (set, &d->metadata);
- d->offset = 0;
- return FcTrue;
-}
-
-FcBool
-FcGlobalCacheSave (FcGlobalCache *cache,
- const FcChar8 *cache_file)
-{
- int fd, fd_orig;
- FcGlobalCacheDir *dir;
- FcAtomic *atomic;
- off_t current_arch_start = 0, truncate_to;
- char * current_arch_machine_name, * header;
-
- if (!cache->updated)
- return FcTrue;
-
-#if defined (HAVE_GETUID) && defined (HAVE_GETEUID)
- /* Set-UID programs can't safely update the cache */
- if (getuid () != geteuid ())
- return FcFalse;
-#endif
- atomic = FcAtomicCreate (cache_file);
- if (!atomic)
+ s = malloc (sizeof (FcCacheSkip) + (level - 1) * sizeof (FcCacheSkip *));
+ if (!s)
return FcFalse;
- if (!FcAtomicLock (atomic))
- goto bail1;
- fd = open ((char *) FcAtomicNewFile(atomic), O_RDWR | O_CREAT,
- S_IRUSR | S_IWUSR);
- if (fd == -1)
- goto bail2;
-
- fd_orig = open ((char *) FcAtomicOrigFile(atomic), O_RDONLY);
-
- current_arch_machine_name = FcCacheMachineSignature ();
- if (fd_orig == -1)
- current_arch_start = 0;
- else
- current_arch_start = FcCacheSkipToArch (fd_orig,
- current_arch_machine_name);
-
- if (current_arch_start < 0)
- current_arch_start = FcCacheNextOffset (lseek(fd_orig, 0, SEEK_END));
-
- if (!FcCacheCopyOld(fd, fd_orig, current_arch_start))
- goto bail3;
-
- close (fd_orig);
- fd_orig = -1;
-
- current_arch_start = lseek(fd, 0, SEEK_CUR);
- if (ftruncate (fd, current_arch_start) == -1)
- goto bail3;
-
- header = malloc (10 + strlen (current_arch_machine_name));
- if (!header)
- goto bail3;
-
- truncate_to = current_arch_start + strlen(current_arch_machine_name) + 11;
- for (dir = cache->dirs; dir; dir = dir->next)
+ s->cache = cache;
+ s->size = cache->size;
+ s->ref = 1;
+ if (cache_stat)
{
- truncate_to += strlen(dir->name) + 1;
- truncate_to += sizeof (FcCache);
- truncate_to = FcCacheNextOffset (truncate_to);
- truncate_to += dir->metadata.count;
+ s->cache_dev = cache_stat->st_dev;
+ s->cache_ino = cache_stat->st_ino;
+ s->cache_mtime = cache_stat->st_mtime;
}
- truncate_to -= current_arch_start;
-
- sprintf (header, "%8x ", (int)truncate_to);
- strcat (header, current_arch_machine_name);
- if (!FcCacheWriteString (fd, header))
- goto bail4;
-
- for (dir = cache->dirs; dir; dir = dir->next)
+ else
{
- if (dir->ent)
- {
- FcCacheWriteString (fd, dir->name);
- write (fd, &dir->metadata, sizeof(FcCache));
- lseek (fd, FcCacheNextOffset (lseek(fd, 0, SEEK_CUR)), SEEK_SET);
- write (fd, dir->ent, dir->metadata.count);
- free (dir->ent);
- }
+ s->cache_dev = 0;
+ s->cache_ino = 0;
+ s->cache_mtime = 0;
}
- FcCacheWriteString (fd, "");
-
- if (close (fd) == -1)
- goto bail25;
-
- if (!FcAtomicReplaceOrig (atomic))
- goto bail25;
- FcAtomicUnlock (atomic);
- FcAtomicDestroy (atomic);
-
- cache->updated = FcFalse;
+ /*
+ * Insert into all fcCacheChains
+ */
+ for (i = 0; i < level; i++)
+ {
+ s->next[i] = *update[i];
+ *update[i] = s;
+ }
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;
}
-/*
- * Find the next presumably-mmapable offset after the supplied file
- * position.
- */
-static int
-FcCacheNextOffset(off_t w)
+static FcCacheSkip *
+FcCacheFindByAddr (void *object)
{
- static long pagesize = -1;
- if (pagesize == -1)
- pagesize = sysconf(_SC_PAGESIZE);
- if (w % pagesize == 0)
- return w;
- else
- return ((w / pagesize)+1)*pagesize;
+ 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;
}
-/* 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)
+static void
+FcCacheRemove (FcCache *cache)
{
- char candidate_arch_machine_name_count[MACHINE_SIGNATURE_SIZE + 9];
- char * candidate_arch;
- off_t current_arch_start = 0;
+ FcCacheSkip **update[FC_CACHE_MAX_LEVEL];
+ FcCacheSkip *s, **next;
+ int i;
- /* skip arches that are not the current arch */
- while (1)
+ /*
+ * Find links along each chain
+ */
+ next = fcCacheChains;
+ for (i = fcCacheMaxLevel; --i >= 0; )
{
- 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;
+ for (; (s = next[i]); next = s->next)
+ if (s->cache >= cache)
+ break;
+ update[i] = &next[i];
}
-
- return -1;
+ 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);
}
-/* 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 FcCache *
+FcCacheFindByStat (struct stat *cache_stat)
{
- char * buf = malloc (8192);
- char candidate_arch_machine_name[MACHINE_SIGNATURE_SIZE + 9];
- long bs;
- int c, bytes_skipped;
- off_t loc;
-
- if (!buf)
- return FcFalse;
+ FcCacheSkip *s;
- 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;
+ 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;
+}
- 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;
+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;
}
- while (c > 0);
- lseek (fd, start+bytes_skipped, SEEK_SET);
+ FcCacheRemove (cache);
+}
- done:
- free (buf);
- return FcTrue;
+void
+FcCacheObjectReference (void *object)
+{
+ FcCacheSkip *skip = FcCacheFindByAddr (object);
- bail:
- free (buf);
- return FcFalse;
+ if (skip)
+ skip->ref++;
}
-/* Does not check that the cache has the appropriate arch section. */
-FcBool
-FcDirCacheValid (const FcChar8 *dir)
+void
+FcCacheObjectDereference (void *object)
{
- FcChar8 *cache_file = FcStrPlus (dir, (FcChar8 *) "/" FC_DIR_CACHE_FILE);
- struct stat file_stat, dir_stat;
+ FcCacheSkip *skip = FcCacheFindByAddr (object);
- if (stat ((char *) dir, &dir_stat) < 0)
+ if (skip)
{
- FcStrFree (cache_file);
- return FcFalse;
+ skip->ref--;
+ if (skip->ref <= 0)
+ FcDirCacheDispose (skip->cache);
}
- if (stat ((char *) cache_file, &file_stat) < 0)
- {
- FcStrFree (cache_file);
- return FcFalse;
- }
-
- FcStrFree (cache_file);
- /*
- * If the directory has been modified more recently than
- * the cache file, the cache is not valid
- */
- if (dir_stat.st_mtime > file_stat.st_mtime)
- return FcFalse;
-
- return FcTrue;
}
-/* Assumes that the cache file in 'dir' exists.
- * Checks that the cache has the appropriate arch section. */
-FcBool
-FcDirCacheHasCurrentArch (const FcChar8 *dir)
+void
+FcCacheFini (void)
{
- FcChar8 *cache_file = FcStrPlus (dir, (FcChar8 *) "/" FC_DIR_CACHE_FILE);
- int fd;
- off_t current_arch_start;
- char *current_arch_machine_name;
-
- current_arch_machine_name = FcCacheMachineSignature();
- fd = open ((char *)cache_file, O_RDONLY);
- if (fd == -1)
- return FcFalse;
-
- current_arch_start = FcCacheSkipToArch(fd, current_arch_machine_name);
- close (fd);
+ int i;
- if (current_arch_start < 0)
- return FcFalse;
-
- return FcTrue;
+ for (i = 0; i < FC_CACHE_MAX_LEVEL; i++)
+ assert (fcCacheChains[i] == NULL);
+ assert (fcCacheMaxLevel == 0);
}
-FcBool
-FcDirCacheUnlink (const FcChar8 *dir)
+static FcBool
+FcCacheTimeValid (FcCache *cache, struct stat *dir_stat)
{
- FcChar8 *cache_file = FcStrPlus (dir, (FcChar8 *) "/" FC_DIR_CACHE_FILE);
- struct stat cache_stat;
+ struct stat dir_static;
- if (stat ((char *) cache_file, &cache_stat) == 0 &&
- unlink ((char *)cache_file) != 0)
+ if (!dir_stat)
{
- FcStrFree (cache_file);
- return FcFalse;
+ if (FcStat ((const char *) FcCacheDir (cache), &dir_static) < 0)
+ return FcFalse;
+ dir_stat = &dir_static;
}
-
- FcStrFree (cache_file);
- return FcTrue;
+ 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;
}
-static int
-FcCacheReadDirs (FcConfig * config, FcGlobalCache * cache,
- FcStrList *list, FcFontSet * set)
+/*
+ * Map a cache file into memory
+ */
+static FcCache *
+FcDirCacheMapFd (int fd, struct stat *fd_stat, struct stat *dir_stat)
{
- int ret = 0;
- FcChar8 *dir;
- FcChar8 *file, *base;
- FcStrSet *subdirs;
- FcStrList *sublist;
- struct stat statb;
+ 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;
+ }
/*
- * Read in the results from 'list'.
+ * Lage cache files are mmap'ed, smaller cache files are read. This
+ * balances the system cost of mmap against per-process memory usage.
*/
- while ((dir = FcStrListNext (list)))
+ if (fd_stat->st_size >= FC_CACHE_MIN_MMAP)
{
- /* 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)
+#if defined(HAVE_MMAP) || defined(__CYGWIN__)
+ cache = mmap (0, fd_stat->st_size, PROT_READ, MAP_SHARED, fd, 0);
+#elif defined(_WIN32)
{
- switch (errno) {
- case ENOENT:
- case ENOTDIR:
- case EACCES:
- break;
- default:
- fprintf (stderr, "\"%s\": ", dir);
- perror ("");
- ret++;
+ HANDLE hFileMap;
+
+ 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);
}
- FcStrSetDestroy (subdirs);
- free (file);
- continue;
- }
- if (stat ((char *) dir, &statb) == -1)
- {
- fprintf (stderr, "\"%s\": ", dir);
- perror ("");
- FcStrSetDestroy (subdirs);
- ret++;
- free (file);
- continue;
}
- if (!S_ISDIR (statb.st_mode))
- {
- fprintf (stderr, "\"%s\": not a directory, skipping\n", dir);
- FcStrSetDestroy (subdirs);
- free (file);
- continue;
- }
- if (!FcDirCacheValid (dir) || !FcDirCacheRead (set, subdirs, dir))
- {
- if (FcDebug () & FC_DBG_FONTSET)
- printf ("cache scan dir %s\n", dir);
+#endif
+ }
+ if (!cache)
+ {
+ cache = malloc (fd_stat->st_size);
+ if (!cache)
+ return NULL;
- FcDirScanConfig (set, subdirs, cache,
- config->blanks, dir, FcFalse, config);
+ if (read (fd, cache, fd_stat->st_size) != fd_stat->st_size)
+ {
+ free (cache);
+ return NULL;
}
- sublist = FcStrListCreate (subdirs);
- FcStrSetDestroy (subdirs);
- if (!sublist)
+ 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
{
- fprintf (stderr, "Can't create subdir list in \"%s\"\n", dir);
- ret++;
- free (file);
- continue;
+#if defined(HAVE_MMAP) || defined(__CYGWIN__)
+ munmap (cache, fd_stat->st_size);
+#elif defined(_WIN32)
+ UnmapViewOfFile (cache);
+#endif
}
- ret += FcCacheReadDirs (config, cache, sublist, set);
- free (file);
+ return NULL;
}
- FcStrListDone (list);
- return ret;
+
+ /* Mark allocated caches so they're freed rather than unmapped */
+ if (allocated)
+ cache->magic = FC_CACHE_MAGIC_ALLOC;
+
+ return cache;
}
-FcFontSet *
-FcCacheRead (FcConfig *config, FcGlobalCache * cache)
+void
+FcDirCacheReference (FcCache *cache, int nref)
{
- FcFontSet * s = FcFontSetCreate();
- if (!s)
- return 0;
-
- if (FcCacheReadDirs (config, cache, FcConfigGetConfigDirs (config), s))
- goto bail;
+ FcCacheSkip *skip = FcCacheFindByAddr (cache);
- return s;
-
- bail:
- FcFontSetDestroy (s);
- return 0;
+ if (skip)
+ skip->ref += nref;
}
-/* read serialized state from the cache file */
-FcBool
-FcDirCacheRead (FcFontSet * set, FcStrSet * dirs, const FcChar8 *dir)
+void
+FcDirCacheUnload (FcCache *cache)
{
- char *cache_file = (char *)FcStrPlus (dir, (FcChar8 *) "/" FC_DIR_CACHE_FILE);
- int fd;
- char * current_arch_machine_name;
- char candidate_arch_machine_name[9+MACHINE_SIGNATURE_SIZE];
- off_t current_arch_start = 0;
- char subdirName[FC_MAX_FILE_LEN + 1 + 12 + 1];
-
- if (!cache_file)
- goto bail;
-
- current_arch_machine_name = FcCacheMachineSignature();
- fd = open(cache_file, O_RDONLY);
- if (fd == -1)
- goto bail;
+ FcCacheObjectDereference (cache);
+}
- current_arch_start = FcCacheSkipToArch(fd, current_arch_machine_name);
- if (current_arch_start < 0)
- goto bail1;
+static FcBool
+FcDirCacheMapHelper (int fd, struct stat *fd_stat, struct stat *dir_stat, void *closure)
+{
+ FcCache *cache = FcDirCacheMapFd (fd, fd_stat, dir_stat);
- lseek (fd, current_arch_start, SEEK_SET);
- if (FcCacheReadString (fd, candidate_arch_machine_name,
- sizeof (candidate_arch_machine_name)) == 0)
- goto bail1;
+ if (!cache)
+ return FcFalse;
+ *((FcCache **) closure) = cache;
+ return FcTrue;
+}
- while (strlen(FcCacheReadString (fd, subdirName, sizeof (subdirName))) > 0)
- FcStrSetAdd (dirs, (FcChar8 *)subdirName);
+FcCache *
+FcDirCacheLoad (const FcChar8 *dir, FcConfig *config, FcChar8 **cache_file)
+{
+ FcCache *cache = NULL;
- if (!FcDirCacheConsume (fd, (const char *)dir, set))
- goto bail1;
-
- close(fd);
- free (cache_file);
- return FcTrue;
+ if (!FcDirCacheProcess (config, dir,
+ FcDirCacheMapHelper,
+ &cache, cache_file))
+ return NULL;
+ return cache;
+}
- bail1:
+FcCache *
+FcDirCacheLoadFile (const FcChar8 *cache_file, struct stat *file_stat)
+{
+ 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);
- bail:
- free (cache_file);
- return FcFalse;
+ return cache;
}
+/*
+ * Validate a cache file by reading the header and checking
+ * the magic number and the size field
+ */
static FcBool
-FcDirCacheConsume (int fd, const char * dir, FcFontSet *set)
+FcDirCacheValidateHelper (int fd, struct stat *fd_stat, struct stat *dir_stat, void *closure)
{
- FcCache metadata;
- void * current_dir_block;
- off_t pos;
+ 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;
+}
- read(fd, &metadata, sizeof(FcCache));
- if (metadata.magic != FC_CACHE_MAGIC)
+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;
- if (!metadata.count)
- return FcTrue;
+ return FcDirCacheValidConfig (dir, config);
+}
- pos = FcCacheNextOffset (lseek(fd, 0, SEEK_CUR));
- current_dir_block = mmap (0, metadata.count,
- PROT_READ, MAP_SHARED, fd, pos);
- if (current_dir_block == MAP_FAILED)
- return FcFalse;
+/*
+ * 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;
- if (!FcFontSetUnserialize (&metadata, set, current_dir_block))
- return FcFalse;
+ 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;
- FcCacheAddBankDir (metadata.bank, dir);
+ /*
+ * 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);
- return FcTrue;
-}
+ serialize->linear = cache;
-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 */
+ 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);
}
+
+ /*
+ * Serialize font set
+ */
+ set_serialize = FcFontSetSerialize (serialize, set);
+ if (!set_serialize)
+ goto bail2;
+ cache->set = FcPtrToOffset (cache, set_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);
+ FcSerializeDestroy (serialize);
+
+ FcCacheInsert (cache, NULL);
- if ((void *)((char *)current_dir_block+metadata->count) < final_dir_block)
- goto bail;
-
- if (!FcFontSetSerialize (bank, set))
- goto bail;
+ return cache;
- return current_dir_block;
+bail2:
+ free (cache);
+bail1:
+ FcSerializeDestroy (serialize);
+ return NULL;
+}
- bail:
- free (current_dir_block);
- return 0;
+
+#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, 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)
{
- FcChar8 *cache_file = FcStrPlus (dir, (FcChar8 *) "/" FC_DIR_CACHE_FILE);
- 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 *current_arch_machine_name, * header;
- void *current_dir_block;
+ FcStrList *list;
+ FcChar8 *cache_dir = NULL;
+ FcChar8 *test_dir;
+ FcCacheSkip *skip;
+ struct stat cache_stat;
+ int magic;
+ int written;
- if (!cache_file)
- goto bail;
-
- current_dir_block = FcDirCacheProduce (set, &metadata);
+ /*
+ * Write it to the first directory in the list which is writable
+ */
+
+ list = FcStrListCreate (config->cacheDirs);
+ if (!list)
+ return FcFalse;
+ while ((test_dir = FcStrListNext (list))) {
+ if (access ((char *) test_dir, W_OK|X_OK) == 0)
+ {
+ cache_dir = test_dir;
+ break;
+ }
+ 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 bail0;
+ 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 (cache_file);
+ atomic = FcAtomicCreate ((FcChar8 *)cache_hashed);
if (!atomic)
- goto bail0;
+ goto bail1;
if (!FcAtomicLock (atomic))
- goto bail1;
-
- fd_orig = open((char *)FcAtomicOrigFile (atomic), O_RDONLY, 0666);
-
- fd = open((char *)FcAtomicNewFile (atomic), O_RDWR | O_CREAT, 0666);
- if (fd == -1)
- goto bail2;
-
- current_arch_machine_name = FcCacheMachineSignature ();
- current_arch_start = 0;
-
- if (fd_orig != -1)
- current_arch_start =
- FcCacheSkipToArch(fd_orig, current_arch_machine_name);
-
- if (current_arch_start < 0)
- current_arch_start = FcCacheNextOffset (lseek(fd_orig, 0, SEEK_END));
-
- if (fd_orig != -1 && !FcCacheCopyOld(fd, fd_orig, current_arch_start))
- goto bail3;
-
- if (fd_orig != -1)
- close (fd_orig);
-
- current_arch_start = lseek(fd, 0, SEEK_CUR);
- if (ftruncate (fd, current_arch_start) == -1)
goto bail3;
- /* allocate space for subdir names in this block */
- dirs_count = 0;
- for (i = 0; i < dirs->size; i++)
- dirs_count += strlen((char *)dirs->strs[i]) + 1;
- dirs_count ++;
-
- /* now write the address of the next offset */
- truncate_to = FcCacheNextOffset (FcCacheNextOffset (current_arch_start + sizeof (FcCache) + dirs_count) + metadata.count) - current_arch_start;
- header = malloc (10 + strlen (current_arch_machine_name));
- if (!header)
- goto bail3;
- sprintf (header, "%8x ", (int)truncate_to);
- strcat (header, current_arch_machine_name);
- if (!FcCacheWriteString (fd, header))
+ fd = open((char *)FcAtomicNewFile (atomic), O_RDWR | O_CREAT | O_BINARY, 0666);
+ if (fd == -1)
goto bail4;
-
- for (i = 0; i < dirs->size; i++)
- FcCacheWriteString (fd, (char *)dirs->strs[i]);
- FcCacheWriteString (fd, "");
-
- write (fd, &metadata, sizeof(FcCache));
- if (metadata.count)
+
+ /* 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 cache contents to file
+ */
+ written = write (fd, cache, cache->size);
+
+ /* Switch magic back */
+ if (magic != FC_CACHE_MAGIC_MMAP)
+ cache->magic = magic;
+
+ if (written != cache->size)
{
- lseek (fd, FcCacheNextOffset (lseek(fd, 0, SEEK_END)), SEEK_SET);
- write (fd, current_dir_block, metadata.count);
- free (current_dir_block);
+ perror ("write cache");
+ goto bail5;
}
- /* this actually serves to pad out the cache file, if needed */
- if (ftruncate (fd, current_arch_start + truncate_to) == -1)
- goto bail4;
-
close(fd);
if (!FcAtomicReplaceOrig(atomic))
goto bail4;
+
+ /* 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;
- bail4:
- free (header);
- bail3:
+ bail5:
close (fd);
- bail2:
+ bail4:
FcAtomicUnlock (atomic);
- bail1:
+ bail3:
FcAtomicDestroy (atomic);
- bail0:
- unlink ((char *)cache_file);
- free (cache_file);
- if (current_dir_block)
- free (current_dir_block);
- bail:
+ bail1:
+ FcStrFree (cache_hashed);
return FcFalse;
}
-static char *
-FcCacheMachineSignature ()
+/*
+ * 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)
+
+const FcChar8 *
+FcCacheDir args1(const FcCache *c)
{
- 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;
+ return FcCacheDir (c);
+}
+
+FcFontSet *
+FcCacheCopySet args1(const FcCache *c)
+{
+ FcFontSet *old = FcCacheSet (c);
+ FcFontSet *new = FcFontSetCreate ();
+ int i;
+
+ if (!new)
+ return NULL;
+ for (i = 0; i < old->nfont; i++)
+ {
+ FcPattern *font = FcFontSetFont (old, i);
+
+ FcPatternReference (font);
+ if (!FcFontSetAdd (new, font))
+ {
+ FcFontSetDestroy (new);
+ return NULL;
+ }
+ }
+ return new;
}
-static int banks_ptr = 0, banks_alloc = 0;
-static int * bankId = 0, * bankIdx = 0;
-static const char ** bankDirs = 0;
+const FcChar8 *
+FcCacheSubdir args2(const FcCache *c, int i)
+{
+ return FcCacheSubdir (c, i);
+}
-static FcBool
-FcCacheHaveBank (int bank)
+int
+FcCacheNumSubdir args1(const FcCache *c)
{
- int i;
+ return c->dirs_count;
+}
- if (bank < FC_BANK_FIRST)
- return FcTrue;
+int
+FcCacheNumFont args1(const FcCache *c)
+{
+ return FcCacheSet(c)->nfont;
+}
- for (i = 0; i < banks_ptr; i++)
- if (bankId[i] == bank)
- return FcTrue;
+/*
+ * This code implements the MD5 message-digest algorithm.
+ * The algorithm is due to Ron Rivest. This code was
+ * written by Colin Plumb in 1993, no copyright is claimed.
+ * This code is in the public domain; do with it what you wish.
+ *
+ * Equivalent code is available from RSA Data Security, Inc.
+ * This code has been tested against that, and is equivalent,
+ * except that you don't need to include two pages of legalese
+ * with every copy.
+ *
+ * To compute the message digest of a chunk of bytes, declare an
+ * MD5Context structure, pass it to MD5Init, call MD5Update as
+ * needed on buffers full of bytes, and then call MD5Final, which
+ * will fill a supplied 16-byte array with the digest.
+ */
- return FcFalse;
+#ifndef HIGHFIRST
+#define byteReverse(buf, len) /* Nothing */
+#else
+/*
+ * Note: this code is harmless on little-endian machines.
+ */
+void byteReverse(unsigned char *buf, unsigned longs)
+{
+ FcChar32 t;
+ do {
+ t = (FcChar32) ((unsigned) buf[3] << 8 | buf[2]) << 16 |
+ ((unsigned) buf[1] << 8 | buf[0]);
+ *(FcChar32 *) buf = t;
+ buf += 4;
+ } while (--longs);
}
+#endif
-int
-FcCacheBankToIndex (int bank)
+/*
+ * Start MD5 accumulation. Set bit count to 0 and buffer to mysterious
+ * initialization constants.
+ */
+static void MD5Init(struct MD5Context *ctx)
{
- int i, j;
+ ctx->buf[0] = 0x67452301;
+ ctx->buf[1] = 0xefcdab89;
+ ctx->buf[2] = 0x98badcfe;
+ ctx->buf[3] = 0x10325476;
- for (i = 0; i < banks_ptr; i++)
- if (bankId[bankIdx[i]] == bank)
- {
- int t = bankIdx[i];
+ ctx->bits[0] = 0;
+ ctx->bits[1] = 0;
+}
- for (j = i; j > 0; j--)
- bankIdx[j] = bankIdx[j-1];
- bankIdx[0] = t;
- return t;
- }
+/*
+ * Update context to reflect the concatenation of another buffer full
+ * of bytes.
+ */
+static void MD5Update(struct MD5Context *ctx, const unsigned char *buf, unsigned len)
+{
+ FcChar32 t;
- if (banks_ptr >= banks_alloc)
- {
- int * b, * bidx;
- const char ** bds;
+ /* Update bitcount */
+
+ t = ctx->bits[0];
+ if ((ctx->bits[0] = t + ((FcChar32) len << 3)) < t)
+ ctx->bits[1]++; /* Carry from low to high */
+ ctx->bits[1] += len >> 29;
- b = realloc (bankId, (banks_alloc + 4) * sizeof(int));
- if (!b)
- return -1;
- bankId = b;
+ t = (t >> 3) & 0x3f; /* Bytes already in shsInfo->data */
- bidx = realloc (bankIdx, (banks_alloc + 4) * sizeof(int));
- if (!bidx)
- return -1;
- bankIdx = bidx;
+ /* Handle any leading odd-sized chunks */
- bds = realloc (bankDirs, (banks_alloc + 4) * sizeof (char *));
- if (!bds)
- return -1;
- bankDirs = bds;
+ if (t) {
+ unsigned char *p = (unsigned char *) ctx->in + t;
- banks_alloc += 4;
+ t = 64 - t;
+ if (len < t) {
+ memcpy(p, buf, len);
+ return;
+ }
+ memcpy(p, buf, t);
+ byteReverse(ctx->in, 16);
+ MD5Transform(ctx->buf, (FcChar32 *) ctx->in);
+ buf += t;
+ len -= t;
+ }
+ /* Process data in 64-byte chunks */
+
+ while (len >= 64) {
+ memcpy(ctx->in, buf, 64);
+ byteReverse(ctx->in, 16);
+ MD5Transform(ctx->buf, (FcChar32 *) ctx->in);
+ buf += 64;
+ len -= 64;
}
- i = banks_ptr++;
- bankId[i] = bank;
- bankIdx[i] = i;
- return i;
+ /* Handle any remaining bytes of data. */
+
+ memcpy(ctx->in, buf, len);
}
-static void
-FcCacheAddBankDir (int bank, const char * dir)
+/*
+ * 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)
{
- int bi = FcCacheBankToIndex (bank);
+ unsigned count;
+ unsigned char *p;
+
+ /* Compute number of bytes mod 64 */
+ count = (ctx->bits[0] >> 3) & 0x3F;
+
+ /* Set the first char of padding to 0x80. This is safe since there is
+ always at least one byte free */
+ p = ctx->in + count;
+ *p++ = 0x80;
+
+ /* Bytes of padding needed to make 64 bytes */
+ count = 64 - 1 - count;
+
+ /* Pad out to 56 mod 64 */
+ if (count < 8) {
+ /* Two lots of padding: Pad the first block to 64 bytes */
+ memset(p, 0, count);
+ byteReverse(ctx->in, 16);
+ MD5Transform(ctx->buf, (FcChar32 *) ctx->in);
+
+ /* Now fill the next block with 56 bytes */
+ memset(ctx->in, 0, 56);
+ } else {
+ /* Pad block to 56 bytes */
+ memset(p, 0, count - 8);
+ }
+ byteReverse(ctx->in, 14);
- if (bi < 0)
- return;
+ /* Append length in bits and transform */
+ ((FcChar32 *) ctx->in)[14] = ctx->bits[0];
+ ((FcChar32 *) ctx->in)[15] = ctx->bits[1];
- bankDirs[bi] = (const char *)FcStrCopy ((FcChar8 *)dir);
+ 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 */
}
-const char *
-FcCacheFindBankDir (int bank)
+
+/* The four core functions - F1 is optimized somewhat */
+
+/* #define F1(x, y, z) (x & y | ~x & z) */
+#define F1(x, y, z) (z ^ (x & (y ^ z)))
+#define F2(x, y, z) F1(z, x, y)
+#define F3(x, y, z) (x ^ y ^ z)
+#define F4(x, y, z) (y ^ (x | ~z))
+
+/* This is the central step in the MD5 algorithm. */
+#define MD5STEP(f, w, x, y, z, data, s) \
+ ( w += f(x, y, z) + data, w = w<<s | w>>(32-s), w += x )
+
+/*
+ * The core of the MD5 algorithm, this alters an existing MD5 hash to
+ * reflect the addition of 16 longwords of new data. MD5Update blocks
+ * the data and converts bytes into longwords for this routine.
+ */
+static void MD5Transform(FcChar32 buf[4], FcChar32 in[16])
{
- int bi = FcCacheBankToIndex (bank);
- return bankDirs[bi];
+ register FcChar32 a, b, c, d;
+
+ a = buf[0];
+ b = buf[1];
+ c = buf[2];
+ d = buf[3];
+
+ MD5STEP(F1, a, b, c, d, in[0] + 0xd76aa478, 7);
+ MD5STEP(F1, d, a, b, c, in[1] + 0xe8c7b756, 12);
+ MD5STEP(F1, c, d, a, b, in[2] + 0x242070db, 17);
+ MD5STEP(F1, b, c, d, a, in[3] + 0xc1bdceee, 22);
+ MD5STEP(F1, a, b, c, d, in[4] + 0xf57c0faf, 7);
+ MD5STEP(F1, d, a, b, c, in[5] + 0x4787c62a, 12);
+ MD5STEP(F1, c, d, a, b, in[6] + 0xa8304613, 17);
+ MD5STEP(F1, b, c, d, a, in[7] + 0xfd469501, 22);
+ MD5STEP(F1, a, b, c, d, in[8] + 0x698098d8, 7);
+ MD5STEP(F1, d, a, b, c, in[9] + 0x8b44f7af, 12);
+ MD5STEP(F1, c, d, a, b, in[10] + 0xffff5bb1, 17);
+ MD5STEP(F1, b, c, d, a, in[11] + 0x895cd7be, 22);
+ MD5STEP(F1, a, b, c, d, in[12] + 0x6b901122, 7);
+ MD5STEP(F1, d, a, b, c, in[13] + 0xfd987193, 12);
+ MD5STEP(F1, c, d, a, b, in[14] + 0xa679438e, 17);
+ MD5STEP(F1, b, c, d, a, in[15] + 0x49b40821, 22);
+
+ MD5STEP(F2, a, b, c, d, in[1] + 0xf61e2562, 5);
+ MD5STEP(F2, d, a, b, c, in[6] + 0xc040b340, 9);
+ MD5STEP(F2, c, d, a, b, in[11] + 0x265e5a51, 14);
+ MD5STEP(F2, b, c, d, a, in[0] + 0xe9b6c7aa, 20);
+ MD5STEP(F2, a, b, c, d, in[5] + 0xd62f105d, 5);
+ MD5STEP(F2, d, a, b, c, in[10] + 0x02441453, 9);
+ MD5STEP(F2, c, d, a, b, in[15] + 0xd8a1e681, 14);
+ MD5STEP(F2, b, c, d, a, in[4] + 0xe7d3fbc8, 20);
+ MD5STEP(F2, a, b, c, d, in[9] + 0x21e1cde6, 5);
+ MD5STEP(F2, d, a, b, c, in[14] + 0xc33707d6, 9);
+ MD5STEP(F2, c, d, a, b, in[3] + 0xf4d50d87, 14);
+ MD5STEP(F2, b, c, d, a, in[8] + 0x455a14ed, 20);
+ MD5STEP(F2, a, b, c, d, in[13] + 0xa9e3e905, 5);
+ MD5STEP(F2, d, a, b, c, in[2] + 0xfcefa3f8, 9);
+ MD5STEP(F2, c, d, a, b, in[7] + 0x676f02d9, 14);
+ MD5STEP(F2, b, c, d, a, in[12] + 0x8d2a4c8a, 20);
+
+ MD5STEP(F3, a, b, c, d, in[5] + 0xfffa3942, 4);
+ MD5STEP(F3, d, a, b, c, in[8] + 0x8771f681, 11);
+ MD5STEP(F3, c, d, a, b, in[11] + 0x6d9d6122, 16);
+ MD5STEP(F3, b, c, d, a, in[14] + 0xfde5380c, 23);
+ MD5STEP(F3, a, b, c, d, in[1] + 0xa4beea44, 4);
+ MD5STEP(F3, d, a, b, c, in[4] + 0x4bdecfa9, 11);
+ MD5STEP(F3, c, d, a, b, in[7] + 0xf6bb4b60, 16);
+ MD5STEP(F3, b, c, d, a, in[10] + 0xbebfbc70, 23);
+ MD5STEP(F3, a, b, c, d, in[13] + 0x289b7ec6, 4);
+ MD5STEP(F3, d, a, b, c, in[0] + 0xeaa127fa, 11);
+ MD5STEP(F3, c, d, a, b, in[3] + 0xd4ef3085, 16);
+ MD5STEP(F3, b, c, d, a, in[6] + 0x04881d05, 23);
+ MD5STEP(F3, a, b, c, d, in[9] + 0xd9d4d039, 4);
+ MD5STEP(F3, d, a, b, c, in[12] + 0xe6db99e5, 11);
+ MD5STEP(F3, c, d, a, b, in[15] + 0x1fa27cf8, 16);
+ MD5STEP(F3, b, c, d, a, in[2] + 0xc4ac5665, 23);
+
+ MD5STEP(F4, a, b, c, d, in[0] + 0xf4292244, 6);
+ MD5STEP(F4, d, a, b, c, in[7] + 0x432aff97, 10);
+ MD5STEP(F4, c, d, a, b, in[14] + 0xab9423a7, 15);
+ MD5STEP(F4, b, c, d, a, in[5] + 0xfc93a039, 21);
+ MD5STEP(F4, a, b, c, d, in[12] + 0x655b59c3, 6);
+ MD5STEP(F4, d, a, b, c, in[3] + 0x8f0ccc92, 10);
+ MD5STEP(F4, c, d, a, b, in[10] + 0xffeff47d, 15);
+ MD5STEP(F4, b, c, d, a, in[1] + 0x85845dd1, 21);
+ MD5STEP(F4, a, b, c, d, in[8] + 0x6fa87e4f, 6);
+ MD5STEP(F4, d, a, b, c, in[15] + 0xfe2ce6e0, 10);
+ MD5STEP(F4, c, d, a, b, in[6] + 0xa3014314, 15);
+ MD5STEP(F4, b, c, d, a, in[13] + 0x4e0811a1, 21);
+ MD5STEP(F4, a, b, c, d, in[4] + 0xf7537e82, 6);
+ MD5STEP(F4, d, a, b, c, in[11] + 0xbd3af235, 10);
+ MD5STEP(F4, c, d, a, b, in[2] + 0x2ad7d2bb, 15);
+ MD5STEP(F4, b, c, d, a, in[9] + 0xeb86d391, 21);
+
+ buf[0] += a;
+ buf[1] += b;
+ buf[2] += c;
+ buf[3] += d;
}
-
+#define __fccache__
+#include "fcaliastail.h"
+#undef __fccache__