/*
- * $XFree86: $
+ * $RCSId: xc/lib/fontconfig/src/fccache.c,v 1.12 2002/08/22 07:36:44 keithp Exp $
*
- * Copyright © 2000 Keith Packard, member of The XFree86 Project, Inc.
+ * Copyright © 2000 Keith Packard
+ * Copyright © 2005 Patrick Lam
*
* Permission to use, copy, modify, distribute, and sell this software and its
* documentation for any purpose is hereby granted without fee, provided that
* PERFORMANCE OF THIS SOFTWARE.
*/
+#include <fcntl.h>
+#include <dirent.h>
+#include <sys/mman.h>
+#include <sys/utsname.h>
+#include <sys/types.h>
+#include <unistd.h>
#include "fcint.h"
-static unsigned int
-FcFileCacheHash (const char *string)
-{
- unsigned int h = 0;
- char c;
+#define ENDIAN_TEST 0x12345678
+#define MACHINE_SIGNATURE_SIZE 9 + 5*19 + 1
- while ((c = *string++))
- h = (h << 1) ^ c;
- return h;
-}
+static off_t
+FcCacheSkipToArch (int fd, const char * arch);
-char *
-FcFileCacheFind (FcFileCache *cache,
- const char *file,
- int id,
- int *count)
-{
- unsigned int hash;
- const char *match;
- FcFileCacheEnt *c, *name;
- int maxid;
- struct stat statb;
-
- match = file;
-
- hash = FcFileCacheHash (match);
- name = 0;
- maxid = -1;
- for (c = cache->ents[hash % FC_FILE_CACHE_HASH_SIZE]; c; c = c->next)
- {
- if (c->hash == hash && !strcmp (match, c->file))
- {
- if (c->id > maxid)
- maxid = c->id;
- if (c->id == id)
- {
- if (stat (file, &statb) < 0)
- {
- if (FcDebug () & FC_DBG_CACHE)
- printf (" file missing\n");
- return 0;
- }
- if (statb.st_mtime != c->time)
- {
- if (FcDebug () & FC_DBG_CACHE)
- printf (" timestamp mismatch (was %d is %d)\n",
- (int) c->time, (int) statb.st_mtime);
- return 0;
- }
- if (!c->referenced)
- {
- cache->referenced++;
- c->referenced = FcTrue;
- }
- name = c;
- }
- }
- }
- if (!name)
- return 0;
- *count = maxid + 1;
- return name->name;
-}
+static FcBool
+FcCacheCopyOld (int fd, int fd_orig, off_t start);
+
+static void *
+FcDirCacheProduce (FcFontSet *set, FcCache * metadata);
+
+static FcBool
+FcDirCacheConsume (int fd, FcFontSet *set);
+
+FcBool
+FcDirCacheRead (FcFontSet * set, FcStrSet * dirs, const FcChar8 *dir);
+
+static int
+FcCacheNextOffset(off_t w);
+
+static char *
+FcCacheMachineSignature (void);
-/*
- * Cache file syntax is quite simple:
- *
- * "file_name" id time "font_name" \n
- */
-
static FcBool
-FcFileCacheReadString (FILE *f, char *dest, int len)
+FcCacheHaveBank (int bank);
+
+#define FC_DBG_CACHE_REF 1024
+
+static char *
+FcCacheReadString (int fd, char *dest, int len)
{
- int c;
- FcBool escape;
+ FcChar8 c;
+ FcBool escape;
+ int size;
+ int i;
- while ((c = getc (f)) != EOF)
- if (c == '"')
- break;
- if (c == EOF)
- return FcFalse;
if (len == 0)
- return FcFalse;
+ return 0;
+ size = len;
+ i = 0;
escape = FcFalse;
- while ((c = getc (f)) != EOF)
+ while (read (fd, &c, 1) == 1)
{
if (!escape)
{
switch (c) {
case '"':
- *dest++ = '\0';
- return FcTrue;
+ c = '\0';
+ break;
case '\\':
escape = FcTrue;
continue;
}
}
- if (--len <= 1)
- return FcFalse;
- *dest++ = c;
+ if (i == size)
+ {
+ dest[i++] = 0;
+ return dest;
+ }
+ dest[i++] = c;
+ if (c == '\0')
+ return dest;
escape = FcFalse;
}
- return FcFalse;
+ return 0;
}
static FcBool
-FcFileCacheReadUlong (FILE *f, unsigned long *dest)
+FcCacheWriteString (int fd, const char *chars)
{
- unsigned long t;
- int c;
-
- while ((c = getc (f)) != EOF)
- {
- if (!isspace (c))
- break;
- }
- if (c == EOF)
+ if (write (fd, chars, strlen(chars)+1) != strlen(chars)+1)
return FcFalse;
- t = 0;
- for (;;)
- {
- if (c == EOF || isspace (c))
- break;
- if (!isdigit (c))
- return FcFalse;
- t = t * 10 + (c - '0');
- c = getc (f);
- }
- *dest = t;
return FcTrue;
}
-static FcBool
-FcFileCacheReadInt (FILE *f, int *dest)
-{
- unsigned long t;
- FcBool ret;
-
- ret = FcFileCacheReadUlong (f, &t);
- if (ret)
- *dest = (int) t;
- return ret;
-}
-
-static FcBool
-FcFileCacheReadTime (FILE *f, time_t *dest)
-{
- unsigned long t;
- FcBool ret;
-
- ret = FcFileCacheReadUlong (f, &t);
- if (ret)
- *dest = (time_t) t;
- return ret;
-}
-
-static FcBool
-FcFileCacheAdd (FcFileCache *cache,
- const char *file,
- int id,
- time_t time,
- const char *name,
- FcBool replace)
+static void
+FcGlobalCacheDirDestroy (FcGlobalCacheDir *d)
{
- FcFileCacheEnt *c;
- FcFileCacheEnt **prev, *old;
- unsigned int hash;
-
- if (FcDebug () & FC_DBG_CACHE)
- {
- printf ("%s face %s/%d as %s\n", replace ? "Replace" : "Add",
- file, id, name);
- }
- hash = FcFileCacheHash (file);
- for (prev = &cache->ents[hash % FC_FILE_CACHE_HASH_SIZE];
- (old = *prev);
- prev = &(*prev)->next)
- {
- if (old->hash == hash && old->id == id && !strcmp (old->file, file))
- break;
- }
- if (*prev)
- {
- if (!replace)
- return FcFalse;
-
- old = *prev;
- if (old->referenced)
- cache->referenced--;
- *prev = old->next;
- free (old);
- cache->entries--;
- }
-
- c = malloc (sizeof (FcFileCacheEnt) +
- strlen (file) + 1 +
- strlen (name) + 1);
- if (!c)
- return FcFalse;
- c->next = *prev;
- *prev = c;
- c->hash = hash;
- c->file = (char *) (c + 1);
- c->id = id;
- c->name = c->file + strlen (file) + 1;
- strcpy (c->file, file);
- c->time = time;
- c->referenced = replace;
- strcpy (c->name, name);
- cache->entries++;
- return FcTrue;
+ FcMemFree (FC_MEM_STRING, strlen (d->name)+1);
+ free (d->name);
+ FcMemFree (FC_MEM_CACHE, sizeof (FcGlobalCacheDir));
+ free (d);
}
-FcFileCache *
-FcFileCacheCreate (void)
+FcGlobalCache *
+FcGlobalCacheCreate (void)
{
- FcFileCache *cache;
- int h;
+ FcGlobalCache *cache;
- cache = malloc (sizeof (FcFileCache));
+ cache = malloc (sizeof (FcGlobalCache));
if (!cache)
return 0;
- for (h = 0; h < FC_FILE_CACHE_HASH_SIZE; h++)
- cache->ents[h] = 0;
- cache->entries = 0;
- cache->referenced = 0;
+ FcMemAlloc (FC_MEM_CACHE, sizeof (FcGlobalCache));
+ cache->dirs = 0;
cache->updated = FcFalse;
+ cache->fd = -1;
return cache;
}
void
-FcFileCacheDestroy (FcFileCache *cache)
+FcGlobalCacheDestroy (FcGlobalCache *cache)
{
- FcFileCacheEnt *c, *next;
- int h;
+ FcGlobalCacheDir *d, *next;
- for (h = 0; h < FC_FILE_CACHE_HASH_SIZE; h++)
+ for (d = cache->dirs; d; d = next)
{
- for (c = cache->ents[h]; c; c = next)
- {
- next = c->next;
- free (c);
- }
+ next = d->next;
+ FcGlobalCacheDirDestroy (d);
}
+ FcMemFree (FC_MEM_CACHE, sizeof (FcGlobalCache));
free (cache);
}
void
-FcFileCacheLoad (FcFileCache *cache,
- const char *cache_file)
+FcGlobalCacheLoad (FcGlobalCache *cache,
+ FcStrSet *staleDirs,
+ const FcChar8 *cache_file)
{
- FILE *f;
- char file[8192];
- int id;
- time_t time;
- char name[8192];
-
- f = fopen (cache_file, "r");
- if (!f)
+ char name_buf[8192];
+ FcGlobalCacheDir *d, *next;
+ char * current_arch_machine_name;
+ char candidate_arch_machine_name[MACHINE_SIGNATURE_SIZE + 9];
+ off_t current_arch_start;
+
+ struct stat cache_stat, dir_stat;
+
+ if (stat ((char *) cache_file, &cache_stat) < 0)
+ return;
+
+ cache->fd = open ((char *) cache_file, O_RDONLY);
+ if (cache->fd == -1)
return;
cache->updated = FcFalse;
- while (FcFileCacheReadString (f, file, sizeof (file)) &&
- FcFileCacheReadInt (f, &id) &&
- FcFileCacheReadTime (f, &time) &&
- FcFileCacheReadString (f, name, sizeof (name)))
+
+ current_arch_machine_name = FcCacheMachineSignature ();
+ current_arch_start = FcCacheSkipToArch(cache->fd,
+ current_arch_machine_name);
+ if (current_arch_start < 0)
+ goto bail0;
+
+ 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 bail0;
+
+ while (1)
{
- (void) FcFileCacheAdd (cache, file, id, time, name, FcFalse);
- }
- fclose (f);
-}
+ off_t targ;
-FcBool
-FcFileCacheUpdate (FcFileCache *cache,
- const char *file,
- int id,
- const char *name)
-{
- const char *match;
- struct stat statb;
- FcBool ret;
+ FcCacheReadString (cache->fd, name_buf, sizeof (name_buf));
+ if (!strlen(name_buf))
+ break;
- match = file;
+ if (stat ((char *) name_buf, &dir_stat) < 0 ||
+ dir_stat.st_mtime > cache_stat.st_mtime)
+ {
+ FcCache md;
- if (stat (file, &statb) < 0)
- return FcFalse;
- ret = FcFileCacheAdd (cache, match, id,
- statb.st_mtime, name, FcTrue);
- if (ret)
- cache->updated = FcTrue;
- return ret;
+ FcStrSetAdd (staleDirs, FcStrCopy ((FcChar8 *)name_buf));
+ read (cache->fd, &md, sizeof (FcCache));
+ lseek (cache->fd, FcCacheNextOffset (lseek(cache->fd, 0, SEEK_CUR)) + md.count, SEEK_SET);
+ continue;
+ }
+
+ d = malloc (sizeof (FcGlobalCacheDir));
+ if (!d)
+ goto bail1;
+
+ d->next = cache->dirs;
+ cache->dirs = d;
+
+ d->name = (char *)FcStrCopy ((FcChar8 *)name_buf);
+ d->ent = 0;
+ d->offset = lseek (cache->fd, 0, SEEK_CUR);
+ if (read (cache->fd, &d->metadata, sizeof (FcCache)) != sizeof (FcCache))
+ goto bail1;
+ targ = FcCacheNextOffset (lseek(cache->fd, 0, SEEK_CUR)) + d->metadata.count;
+ if (lseek (cache->fd, targ, SEEK_SET) != targ)
+ goto bail1;
+ }
+ return;
+
+ bail1:
+ for (d = cache->dirs; d; d = next)
+ {
+ next = d->next;
+ free (d);
+ }
+ cache->dirs = 0;
+ bail0:
+ close (cache->fd);
+ cache->fd = -1;
+ return;
}
-static FcBool
-FcFileCacheWriteString (FILE *f, char *string)
+FcBool
+FcGlobalCacheReadDir (FcFontSet *set, FcStrSet *dirs, FcGlobalCache * cache, const char *dir, FcConfig *config)
{
- char c;
+ FcGlobalCacheDir *d;
+ FcBool ret = FcFalse;
- if (putc ('"', f) == EOF)
+ if (cache->fd == -1)
return FcFalse;
- while ((c = *string++))
+
+ for (d = cache->dirs; d; d = d->next)
{
- switch (c) {
- case '"':
- case '\\':
- if (putc ('\\', f) == EOF)
- return FcFalse;
- /* fall through */
- default:
- if (putc (c, f) == EOF)
+ if (strncmp (d->name, dir, strlen(dir)) == 0)
+ {
+ lseek (cache->fd, d->offset, SEEK_SET);
+ if (!FcDirCacheConsume (cache->fd, set))
return FcFalse;
+ if (strcmp (d->name, dir) == 0)
+ ret = FcTrue;
}
}
- if (putc ('"', f) == EOF)
- return FcFalse;
- return FcTrue;
+
+ return ret;
}
-static FcBool
-FcFileCacheWriteUlong (FILE *f, unsigned long t)
+FcBool
+FcGlobalCacheUpdate (FcGlobalCache *cache,
+ const char *name,
+ FcFontSet *set)
{
- int pow;
- unsigned long temp, digit;
+ FcGlobalCacheDir * d;
+
+ if (!set->nfont)
+ return FcTrue;
- temp = t;
- pow = 1;
- while (temp >= 10)
+ for (d = cache->dirs; d; d = d->next)
{
- temp /= 10;
- pow *= 10;
+ if (strcmp(d->name, name) == 0)
+ break;
}
- temp = t;
- while (pow)
+
+ if (!d)
{
- digit = temp / pow;
- if (putc ((char) digit + '0', f) == EOF)
+ d = malloc (sizeof (FcGlobalCacheDir));
+ if (!d)
return FcFalse;
- temp = temp - pow * digit;
- pow = pow / 10;
+ d->next = cache->dirs;
+ cache->dirs = d;
}
- return FcTrue;
-}
-static FcBool
-FcFileCacheWriteInt (FILE *f, int i)
-{
- return FcFileCacheWriteUlong (f, (unsigned long) i);
-}
+ cache->updated = FcTrue;
-static FcBool
-FcFileCacheWriteTime (FILE *f, time_t t)
-{
- return FcFileCacheWriteUlong (f, (unsigned long) t);
+ d->name = (char *)FcStrCopy ((FcChar8 *)name);
+ d->ent = FcDirCacheProduce (set, &d->metadata);
+ d->offset = 0;
+ return FcTrue;
}
FcBool
-FcFileCacheSave (FcFileCache *cache,
- const char *cache_file)
+FcGlobalCacheSave (FcGlobalCache *cache,
+ const FcChar8 *cache_file)
{
- char *lck;
- char *tmp;
- FILE *f;
- int h;
- FcFileCacheEnt *c;
+ 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 && cache->referenced == cache->entries)
+ if (!cache->updated)
return FcTrue;
- lck = malloc (strlen (cache_file)*2 + 4);
- if (!lck)
- goto bail0;
- tmp = lck + strlen (cache_file) + 2;
- strcpy (lck, cache_file);
- strcat (lck, "L");
- strcpy (tmp, cache_file);
- strcat (tmp, "T");
- if (link (lck, cache_file) < 0 && errno != ENOENT)
+#if defined (HAVE_GETUID) && defined (HAVE_GETEUID)
+ /* Set-UID programs can't safely update the cache */
+ if (getuid () != geteuid ())
+ return FcFalse;
+#endif
+
+ atomic = FcAtomicCreate (cache_file);
+ if (!atomic)
+ return FcFalse;
+
+ if (!FcAtomicLock (atomic))
goto bail1;
- if (access (tmp, F_OK) == 0)
- goto bail2;
- f = fopen (tmp, "w");
- if (!f)
+ fd = open ((char *) FcAtomicNewFile(atomic), O_RDWR | O_CREAT,
+ S_IRUSR | S_IWUSR);
+ if (fd == -1)
goto bail2;
- for (h = 0; h < FC_FILE_CACHE_HASH_SIZE; h++)
+ 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)
{
- for (c = cache->ents[h]; c; c = c->next)
- {
- if (!c->referenced)
- continue;
- if (!FcFileCacheWriteString (f, c->file))
- goto bail4;
- if (putc (' ', f) == EOF)
- goto bail4;
- if (!FcFileCacheWriteInt (f, c->id))
- goto bail4;
- if (putc (' ', f) == EOF)
- goto bail4;
- if (!FcFileCacheWriteTime (f, c->time))
- goto bail4;
- if (putc (' ', f) == EOF)
- goto bail4;
- if (!FcFileCacheWriteString (f, c->name))
- goto bail4;
- if (putc ('\n', f) == EOF)
- goto bail4;
- }
+ truncate_to += strlen(dir->name) + 1;
+ truncate_to += sizeof (FcCache);
+ truncate_to = FcCacheNextOffset (current_arch_start + truncate_to);
+ truncate_to += dir->metadata.count;
}
+ truncate_to -= current_arch_start;
- if (fclose (f) == EOF)
- goto bail3;
+ sprintf (header, "%8x ", (int)truncate_to);
+ strcat (header, current_arch_machine_name);
+ if (!FcCacheWriteString (fd, header))
+ goto bail4;
+
+ for (dir = cache->dirs; dir; dir = dir->next)
+ {
+ if (dir->ent)
+ {
+ FcCacheWriteString (fd, dir->name);
+ write (fd, &dir->metadata, sizeof(FcCache));
+ lseek (fd, FcCacheNextOffset (lseek(fd, 0, SEEK_CUR)), SEEK_SET);
+ write (fd, dir->ent, dir->metadata.count);
+ free (dir->ent);
+ }
+ }
+ FcCacheWriteString (fd, "");
+
+ if (close (fd) == -1)
+ goto bail25;
- if (rename (tmp, cache_file) < 0)
- goto bail3;
+ if (!FcAtomicReplaceOrig (atomic))
+ goto bail25;
- unlink (lck);
+ FcAtomicUnlock (atomic);
+ FcAtomicDestroy (atomic);
+
cache->updated = FcFalse;
return FcTrue;
-bail4:
- fclose (f);
-bail3:
- unlink (tmp);
-bail2:
- unlink (lck);
-bail1:
- free (lck);
-bail0:
+ bail4:
+ free (header);
+ bail3:
+ if (fd_orig != -1)
+ close (fd_orig);
+
+ close (fd);
+ bail25:
+ FcAtomicDeleteNew (atomic);
+ bail2:
+ FcAtomicUnlock (atomic);
+ bail1:
+ FcAtomicDestroy (atomic);
+ return FcFalse;
+}
+
+#define PAGESIZE 8192
+/*
+ * Find the next presumably-mmapable offset after the supplied file
+ * position.
+ */
+static int
+FcCacheNextOffset(off_t w)
+{
+ if (w % PAGESIZE == 0)
+ return w;
+ else
+ return ((w / PAGESIZE)+1)*PAGESIZE;
+}
+
+/* return the address of the segment for the provided arch,
+ * or -1 if arch not found */
+static off_t
+FcCacheSkipToArch (int fd, const char * arch)
+{
+ char candidate_arch_machine_name_count[MACHINE_SIGNATURE_SIZE + 9];
+ char * candidate_arch;
+ off_t current_arch_start = 0;
+
+ /* skip arches that are not the current arch */
+ while (1)
+ {
+ long bs;
+
+ if (lseek (fd, current_arch_start, SEEK_SET) != current_arch_start)
+ return -1;
+
+ if (FcCacheReadString (fd, candidate_arch_machine_name_count,
+ sizeof (candidate_arch_machine_name_count)) == 0)
+ return -1;
+ if (!strlen(candidate_arch_machine_name_count))
+ return -1;
+ bs = strtol(candidate_arch_machine_name_count, &candidate_arch, 16);
+
+ // count = 0 should probably be distinguished from the !bs condition
+ if (!bs || bs < strlen (candidate_arch_machine_name_count))
+ return -1;
+
+ candidate_arch++; /* skip leading space */
+
+ if (strcmp (candidate_arch, arch)==0)
+ return current_arch_start;
+ current_arch_start += bs;
+ }
+
+ return -1;
+}
+
+/* Cuts out the segment at the file pointer (moves everything else
+ * down to cover it), and leaves the file pointer at the end of the
+ * file. */
+static FcBool
+FcCacheCopyOld (int fd, int fd_orig, off_t start)
+{
+ char * buf = malloc (8192);
+ char candidate_arch_machine_name[MACHINE_SIGNATURE_SIZE + 9];
+ long bs;
+ int c, bytes_skipped;
+ off_t loc;
+
+ if (!buf)
+ return FcFalse;
+
+ loc = 0;
+ lseek (fd, 0, SEEK_SET); lseek (fd_orig, 0, SEEK_SET);
+ do
+ {
+ int b = 8192;
+ if (loc + b > start)
+ b = start - loc;
+
+ if ((c = read (fd_orig, buf, b)) <= 0)
+ break;
+ if (write (fd, buf, c) < 0)
+ goto bail;
+
+ loc += c;
+ }
+ while (c > 0);
+
+ lseek (fd, start, SEEK_SET);
+ if (FcCacheReadString (fd, candidate_arch_machine_name,
+ sizeof (candidate_arch_machine_name)) == 0)
+ goto done;
+ if (!strlen(candidate_arch_machine_name))
+ goto done;
+
+ bs = strtol(candidate_arch_machine_name, 0, 16);
+ if (bs == 0)
+ goto done;
+
+ bytes_skipped = 0;
+ do
+ {
+ lseek (fd, start+bs+bytes_skipped, SEEK_SET);
+ if ((c = read (fd, buf, 8192)) <= 0)
+ break;
+ lseek (fd, start+bytes_skipped, SEEK_SET);
+ if (write (fd, buf, c) < 0)
+ goto bail;
+ bytes_skipped += c;
+ }
+ while (c > 0);
+ lseek (fd, start+bytes_skipped, SEEK_SET);
+
+ done:
+ free (buf);
+ return FcTrue;
+
+ bail:
+ free (buf);
return FcFalse;
}
+/* Does not check that the cache has the appropriate arch section. */
FcBool
-FcFileCacheReadDir (FcFontSet *set, const char *cache_file)
+FcDirCacheValid (const FcChar8 *dir)
{
- FcPattern *font;
- FILE *f;
- char *path;
- char *base;
- char file[8192];
- int id;
- char name[8192];
- FcBool ret = FcFalse;
+ FcChar8 *cache_file = FcStrPlus (dir, (FcChar8 *) "/" FC_DIR_CACHE_FILE);
+ struct stat file_stat, dir_stat;
- if (FcDebug () & FC_DBG_CACHE)
+ if (stat ((char *) dir, &dir_stat) < 0)
{
- printf ("FcFileCacheReadDir cache_file \"%s\"\n", cache_file);
+ FcStrFree (cache_file);
+ return FcFalse;
}
-
- f = fopen (cache_file, "r");
- if (!f)
+ if (stat ((char *) cache_file, &file_stat) < 0)
{
- if (FcDebug () & FC_DBG_CACHE)
- {
- printf (" no cache file\n");
- }
- goto bail0;
+ FcStrFree (cache_file);
+ return FcFalse;
}
- base = strrchr (cache_file, '/');
- if (!base)
- goto bail1;
- base++;
- path = malloc (base - cache_file + 8192 + 1);
- if (!path)
- goto bail1;
- memcpy (path, cache_file, base - cache_file);
- base = path + (base - cache_file);
+ FcStrFree (cache_file);
+ /*
+ * If the directory has been modified more recently than
+ * the cache file, the cache is not valid
+ */
+ if (dir_stat.st_mtime - file_stat.st_mtime > 0)
+ return FcFalse;
+ return FcTrue;
+}
+
+/* Assumes that the cache file in 'dir' exists.
+ * Checks that the cache has the appropriate arch section. */
+FcBool
+FcDirCacheHasCurrentArch (const FcChar8 *dir)
+{
+ FcChar8 *cache_file = FcStrPlus (dir, (FcChar8 *) "/" FC_DIR_CACHE_FILE);
+ int fd;
+ off_t current_arch_start;
+ char *current_arch_machine_name;
+
+ current_arch_machine_name = FcCacheMachineSignature();
+ fd = open ((char *)cache_file, O_RDONLY);
+ if (fd == -1)
+ return FcFalse;
+
+ current_arch_start = FcCacheSkipToArch(fd, current_arch_machine_name);
+ close (fd);
+
+ if (current_arch_start < 0)
+ return FcFalse;
- while (FcFileCacheReadString (f, file, sizeof (file)) &&
- FcFileCacheReadInt (f, &id) &&
- FcFileCacheReadString (f, name, sizeof (name)))
+ return FcTrue;
+}
+
+FcBool
+FcDirCacheUnlink (const FcChar8 *dir)
+{
+ FcChar8 *cache_file = FcStrPlus (dir, (FcChar8 *) "/" FC_DIR_CACHE_FILE);
+
+ if (unlink ((char *)cache_file) != 0)
+ {
+ FcStrFree (cache_file);
+ return FcFalse;
+ }
+
+ FcStrFree (cache_file);
+ return FcTrue;
+}
+
+static int
+FcCacheReadDirs (FcConfig * config, FcGlobalCache * cache,
+ FcStrList *list, FcFontSet * set)
+{
+ int ret = 0;
+ FcChar8 *dir;
+ FcChar8 *file, *base;
+ FcStrSet *subdirs;
+ FcStrList *sublist;
+ struct stat statb;
+
+ /*
+ * Read in the results from 'list'.
+ */
+ while ((dir = FcStrListNext (list)))
{
- font = FcNameParse (name);
- if (font)
+ /* 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)
{
- strcpy (base, file);
- if (FcDebug () & FC_DBG_CACHEV)
- {
- printf (" dir cache file \"%s\"\n", file);
+ switch (errno) {
+ case ENOENT:
+ case ENOTDIR:
+ case EACCES:
+ break;
+ default:
+ fprintf (stderr, "\"%s\": ", dir);
+ perror ("");
+ ret++;
}
- FcPatternAddString (font, FC_FILE, path);
- if (!FcFontSetAdd (set, font))
- goto bail2;
+ FcStrSetDestroy (subdirs);
+ free (file);
+ continue;
}
+ if (stat ((char *) dir, &statb) == -1)
+ {
+ fprintf (stderr, "\"%s\": ", dir);
+ perror ("");
+ FcStrSetDestroy (subdirs);
+ ret++;
+ free (file);
+ continue;
+ }
+ if (!S_ISDIR (statb.st_mode))
+ {
+ fprintf (stderr, "\"%s\": not a directory, skipping\n", dir);
+ FcStrSetDestroy (subdirs);
+ free (file);
+ continue;
+ }
+ if (!FcDirCacheValid (dir) || !FcDirCacheRead (set, subdirs, dir))
+ {
+ if (FcDebug () & FC_DBG_FONTSET)
+ printf ("cache scan dir %s\n", dir);
+
+ FcDirScanConfig (set, subdirs, cache,
+ config->blanks, dir, FcFalse, config);
+ }
+ sublist = FcStrListCreate (subdirs);
+ FcStrSetDestroy (subdirs);
+ if (!sublist)
+ {
+ fprintf (stderr, "Can't create subdir list in \"%s\"\n", dir);
+ ret++;
+ free (file);
+ continue;
+ }
+ ret += FcCacheReadDirs (config, cache, sublist, set);
+ free (file);
}
- if (FcDebug () & FC_DBG_CACHE)
- {
- printf (" cache loaded\n");
- }
-
- ret = FcTrue;
-bail2:
- free (path);
-bail1:
- fclose (f);
-bail0:
+ FcStrListDone (list);
return ret;
}
+FcFontSet *
+FcCacheRead (FcConfig *config, FcGlobalCache * cache)
+{
+ FcFontSet * s = FcFontSetCreate();
+ if (!s)
+ return 0;
+
+ if (FcCacheReadDirs (config, cache, FcConfigGetConfigDirs (config), s))
+ goto bail;
+
+ return s;
+
+ bail:
+ FcFontSetDestroy (s);
+ return 0;
+}
+
+/* read serialized state from the cache file */
FcBool
-FcFileCacheWriteDir (FcFontSet *set, const char *cache_file)
+FcDirCacheRead (FcFontSet * set, FcStrSet * dirs, const FcChar8 *dir)
{
- FcPattern *font;
- FILE *f;
- char *name;
- char *file, *base;
- int n;
- int id;
- FcBool ret;
+ char *cache_file = (char *)FcStrPlus (dir, (FcChar8 *) "/" FC_DIR_CACHE_FILE);
+ int fd;
+ char * current_arch_machine_name;
+ char candidate_arch_machine_name[9+MACHINE_SIGNATURE_SIZE];
+ off_t current_arch_start = 0;
+ char subdirName[FC_MAX_FILE_LEN + 1 + 12 + 1];
+
+ if (!cache_file)
+ goto bail;
+
+ current_arch_machine_name = FcCacheMachineSignature();
+ fd = open(cache_file, O_RDONLY);
+ if (fd == -1)
+ goto bail;
+
+ current_arch_start = FcCacheSkipToArch(fd, current_arch_machine_name);
+ if (current_arch_start < 0)
+ goto bail1;
+
+ lseek (fd, current_arch_start, SEEK_SET);
+ if (FcCacheReadString (fd, candidate_arch_machine_name,
+ sizeof (candidate_arch_machine_name)) == 0)
+ goto bail1;
- if (FcDebug () & FC_DBG_CACHE)
- printf ("FcFileCacheWriteDir cache_file \"%s\"\n", cache_file);
+ while (strlen(FcCacheReadString (fd, subdirName, sizeof (subdirName))) > 0)
+ FcStrSetAdd (dirs, (FcChar8 *)subdirName);
+
+ if (!FcDirCacheConsume (fd, set))
+ goto bail1;
+
+ close(fd);
+ free (cache_file);
+ return FcTrue;
+
+ bail1:
+ close (fd);
+ bail:
+ free (cache_file);
+ return FcFalse;
+}
+
+static FcBool
+FcDirCacheConsume (int fd, FcFontSet *set)
+{
+ FcCache metadata;
+ void * current_dir_block;
+ off_t pos;
+
+ read(fd, &metadata, sizeof(FcCache));
+ if (metadata.magic != FC_CACHE_MAGIC)
+ return FcFalse;
+
+ if (!metadata.count)
+ return FcTrue;
+
+ pos = FcCacheNextOffset (lseek(fd, 0, SEEK_CUR));
+ current_dir_block = mmap (0, metadata.count,
+ PROT_READ, MAP_SHARED, fd, pos);
+ if (current_dir_block == MAP_FAILED)
+ return FcFalse;
- f = fopen (cache_file, "w");
- if (!f)
- {
- if (FcDebug () & FC_DBG_CACHE)
- printf (" can't create \"%s\"\n", cache_file);
+ if (!FcFontSetUnserialize (metadata, set, current_dir_block))
+ 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;
+
+ if (!rand_state)
+ rand_state = time(0L);
+ bank = rand_r(&rand_state);
+
+ while (FcCacheHaveBank(bank))
+ bank = rand_r(&rand_state);
+
+ memset (metadata, 0, sizeof(FcCache));
+ FcFontSetNewBank();
+ metadata->count = FcFontSetNeededBytes (set);
+ metadata->magic = FC_CACHE_MAGIC;
+ metadata->bank = bank;
+
+ if (!metadata->count) /* not a failure, no fonts to write */
+ return 0;
+
+ current_dir_block = malloc (metadata->count);
+ if (!current_dir_block)
+ goto bail;
+ final_dir_block = FcFontSetDistributeBytes (metadata, current_dir_block);
+
+ if ((char *)current_dir_block + metadata->count != final_dir_block)
+ goto bail;
+
+ if (!FcFontSetSerialize (bank, set))
+ goto bail;
+
+ return current_dir_block;
+
+ bail:
+ free (current_dir_block);
+ return 0;
+}
+
+/* write serialized state to the cache file */
+FcBool
+FcDirCacheWrite (FcFontSet *set, FcStrSet *dirs, const FcChar8 *dir)
+{
+ FcChar8 *cache_file = FcStrPlus (dir, (FcChar8 *) "/" FC_DIR_CACHE_FILE);
+ int fd, fd_orig, i, dirs_count;
+ FcAtomic *atomic;
+ FcCache metadata;
+ off_t current_arch_start = 0, truncate_to;
+
+ char *current_arch_machine_name, * header;
+ void *current_dir_block;
+
+ if (!cache_file)
+ goto bail;
+
+ current_dir_block = FcDirCacheProduce (set, &metadata);
+
+ if (metadata.count && !current_dir_block)
goto bail0;
- }
- for (n = 0; n < set->nfont; n++)
+
+ if (FcDebug () & FC_DBG_CACHE)
+ printf ("FcDirCacheWriteDir cache_file \"%s\"\n", cache_file);
+
+ atomic = FcAtomicCreate (cache_file);
+ if (!atomic)
+ goto bail0;
+
+ if (!FcAtomicLock (atomic))
+ goto bail1;
+
+ fd_orig = open((char *)FcAtomicOrigFile (atomic), O_RDONLY, 0666);
+
+ fd = open((char *)FcAtomicNewFile (atomic), O_RDWR | O_CREAT, 0666);
+ if (fd == -1)
+ goto bail2;
+
+ current_arch_machine_name = FcCacheMachineSignature ();
+ current_arch_start = 0;
+
+ if (fd_orig != -1)
+ current_arch_start =
+ FcCacheSkipToArch(fd_orig, current_arch_machine_name);
+
+ if (current_arch_start < 0)
+ current_arch_start = FcCacheNextOffset (lseek(fd_orig, 0, SEEK_END));
+
+ if (fd_orig != -1 && !FcCacheCopyOld(fd, fd_orig, current_arch_start))
+ goto bail3;
+
+ if (fd_orig != -1)
+ close (fd_orig);
+
+ current_arch_start = lseek(fd, 0, SEEK_CUR);
+ if (ftruncate (fd, current_arch_start) == -1)
+ goto bail3;
+
+ /* allocate space for subdir names in this block */
+ dirs_count = 0;
+ for (i = 0; i < dirs->size; i++)
+ dirs_count += strlen((char *)dirs->strs[i]) + 1;
+ dirs_count ++;
+
+ /* now write the address of the next offset */
+ truncate_to = FcCacheNextOffset (FcCacheNextOffset (current_arch_start + sizeof (FcCache) + dirs_count) + metadata.count) - current_arch_start;
+ header = malloc (10 + strlen (current_arch_machine_name));
+ if (!header)
+ goto bail3;
+ sprintf (header, "%8x ", (int)truncate_to);
+ strcat (header, current_arch_machine_name);
+ if (!FcCacheWriteString (fd, header))
+ goto bail4;
+
+ for (i = 0; i < dirs->size; i++)
+ FcCacheWriteString (fd, (char *)dirs->strs[i]);
+ FcCacheWriteString (fd, "");
+
+ write (fd, &metadata, sizeof(FcCache));
+ if (metadata.count)
{
- font = set->fonts[n];
- if (FcPatternGetString (font, FC_FILE, 0, &file) != FcResultMatch)
- goto bail1;
- base = strrchr (file, '/');
- if (base)
- base = base + 1;
- else
- base = file;
- if (FcPatternGetInteger (font, FC_INDEX, 0, &id) != FcResultMatch)
- goto bail1;
- if (FcDebug () & FC_DBG_CACHEV)
- printf (" write file \"%s\"\n", base);
- if (!FcFileCacheWriteString (f, base))
- goto bail1;
- if (putc (' ', f) == EOF)
- goto bail1;
- if (!FcFileCacheWriteInt (f, id))
- goto bail1;
- if (putc (' ', f) == EOF)
- goto bail1;
- name = FcNameUnparse (font);
- if (!name)
- goto bail1;
- ret = FcFileCacheWriteString (f, name);
- free (name);
- if (!ret)
- goto bail1;
- if (putc ('\n', f) == EOF)
- goto bail1;
+ lseek (fd, FcCacheNextOffset (lseek(fd, 0, SEEK_END)), SEEK_SET);
+ write (fd, current_dir_block, metadata.count);
+ free (current_dir_block);
}
- if (fclose (f) == EOF)
- goto bail0;
-
- if (FcDebug () & FC_DBG_CACHE)
- printf (" cache written\n");
+
+ /* this actually serves to pad out the cache file, if needed */
+ if (ftruncate (fd, current_arch_start + truncate_to) == -1)
+ goto bail4;
+
+ close(fd);
+ if (!FcAtomicReplaceOrig(atomic))
+ goto bail4;
+ FcAtomicUnlock (atomic);
+ FcAtomicDestroy (atomic);
return FcTrue;
-
-bail1:
- fclose (f);
-bail0:
- unlink (cache_file);
+
+ bail4:
+ free (header);
+ bail3:
+ close (fd);
+ bail2:
+ FcAtomicUnlock (atomic);
+ bail1:
+ FcAtomicDestroy (atomic);
+ bail0:
+ unlink ((char *)cache_file);
+ free (cache_file);
+ if (current_dir_block)
+ free (current_dir_block);
+ bail:
return FcFalse;
}
+
+static char *
+FcCacheMachineSignature ()
+{
+ static char buf[MACHINE_SIGNATURE_SIZE];
+ int magic = ENDIAN_TEST;
+ char * m = (char *)&magic;
+
+ sprintf (buf, "%2x%2x%2x%2x "
+ "%4x %4x %4x %4x %4x %4x %4x %4x %4x %4x %4x %4x "
+ "%4x %4x %4x %4x %4x %4x %4x\n",
+ m[0], m[1], m[2], m[3],
+ (unsigned int)sizeof (char),
+ (unsigned int)sizeof (char *),
+ (unsigned int)sizeof (int),
+ (unsigned int)sizeof (FcPattern),
+ (unsigned int)sizeof (FcPatternEltPtr),
+ (unsigned int)sizeof (struct _FcPatternElt *),
+ (unsigned int)sizeof (FcPatternElt),
+ (unsigned int)sizeof (FcObjectPtr),
+ (unsigned int)sizeof (FcValueListPtr),
+ (unsigned int)sizeof (FcValue),
+ (unsigned int)sizeof (FcValueBinding),
+ (unsigned int)sizeof (struct _FcValueList *),
+ (unsigned int)sizeof (FcCharSet),
+ (unsigned int)sizeof (FcCharLeaf **),
+ (unsigned int)sizeof (FcChar16 *),
+ (unsigned int)sizeof (FcChar16),
+ (unsigned int)sizeof (FcCharLeaf),
+ (unsigned int)sizeof (FcChar32),
+ (unsigned int)sizeof (FcCache));
+
+ return buf;
+}
+
+static int banks_ptr = 0, banks_alloc = 0;
+static int * bankId = 0, * bankIdx = 0;
+
+static FcBool
+FcCacheHaveBank (int bank)
+{
+ int i;
+
+ if (bank < FC_BANK_FIRST)
+ return FcTrue;
+
+ for (i = 0; i < banks_ptr; i++)
+ if (bankId[i] == bank)
+ return FcTrue;
+
+ return FcFalse;
+}
+
+int
+FcCacheBankToIndex (int bank)
+{
+ int i, j;
+
+ for (i = 0; i < banks_ptr; i++)
+ if (bankId[bankIdx[i]] == bank)
+ {
+ int t = bankIdx[i];
+
+ for (j = i; j > 0; j--)
+ bankIdx[j] = bankIdx[j-1];
+ bankIdx[0] = t;
+ return t;
+ }
+
+ if (banks_ptr >= banks_alloc)
+ {
+ int * b, * bidx;
+ b = realloc (bankId, (banks_alloc + 4) * sizeof(int));
+ if (!b)
+ return -1;
+ bankId = b;
+
+ bidx = realloc (bankIdx, (banks_alloc + 4) * sizeof(int));
+ if (!bidx)
+ return -1;
+ bankIdx = bidx;
+
+ banks_alloc += 4;
+ }
+
+ i = banks_ptr++;
+ bankId[i] = bank;
+ bankIdx[i] = i;
+ return i;
+}
git.wh0rd.org / fontconfig.git / blobdiff