/*
- * $XFree86: xc/lib/fontconfig/src/fccache.c,v 1.2 2002/02/15 06:01:27 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
* 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 "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
-static unsigned int
-FcFileCacheHash (const FcChar8 *string)
-{
- unsigned int h = 0;
- FcChar8 c;
-
- while ((c = *string++))
- h = (h << 1) ^ c;
- return h;
-}
-
-FcChar8 *
-FcFileCacheFind (FcFileCache *cache,
- const FcChar8 *file,
- int id,
- int *count)
-{
- unsigned int hash;
- const FcChar8 *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 ((char *) 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;
-}
+#ifndef O_BINARY
+#define O_BINARY 0
+#endif
-/*
- * Cache file syntax is quite simple:
+
+struct MD5Context {
+ FcChar32 buf[4];
+ FcChar32 bits[2];
+ unsigned char in[64];
+};
+
+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]);
+
+#define CACHEBASE_LEN (1 + 32 + 1 + sizeof (FC_ARCHITECTURE) + sizeof (FC_CACHE_SUFFIX))
+
+#ifdef _WIN32
+
+#include <windows.h>
+
+#ifdef __GNUC__
+typedef long long INT64;
+#define EPOCH_OFFSET 11644473600ll
+#else
+#define EPOCH_OFFSET 11644473600i64
+typedef __int64 INT64;
+#endif
+
+/* Workaround for problems in the stat() in the Microsoft C library:
+ *
+ * 1) stat() uses FindFirstFile() to get the file
+ * attributes. Unfortunately this API doesn't return correct values
+ * for modification time of a directory until some time after a file
+ * or subdirectory has been added to the directory. (This causes
+ * run-test.sh to fail, for instance.) GetFileAttributesEx() is
+ * better, it returns the updated timestamp right away.
*
- * "file_name" id time "font_name" \n
+ * 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.
*/
-
+
+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;
+
+ /* 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
+ statb->st_mode |= _S_IFREG;
+
+ statb->st_nlink = 1;
+ statb->st_uid = statb->st_gid = 0;
+ statb->st_rdev = 0;
+
+ if (wfad.nFileSizeHigh > 0)
+ return -1;
+ statb->st_size = wfad.nFileSizeLow;
+
+ statb->st_atime = (*(INT64 *)&wfad.ftLastAccessTime)/10000000 - EPOCH_OFFSET;
+ statb->st_mtime = (*(INT64 *)&wfad.ftLastWriteTime)/10000000 - EPOCH_OFFSET;
+ statb->st_ctime = statb->st_mtime;
+
+ return 0;
+}
+
+#else
+
+int
+FcStat (const char *file, struct stat *statb)
+{
+ return stat ((char *) file, statb);
+}
+
+#endif
+
+static const char bin2hex[] = { '0', '1', '2', '3',
+ '4', '5', '6', '7',
+ '8', '9', 'a', 'b',
+ 'c', 'd', 'e', 'f' };
+
static FcChar8 *
-FcFileCacheReadString (FILE *f, FcChar8 *dest, int len)
+FcDirCacheBasename (const FcChar8 * dir, FcChar8 cache_base[CACHEBASE_LEN])
{
- int c;
- FcBool escape;
- FcChar8 *d;
- int size;
- int i;
+ unsigned char hash[16];
+ FcChar8 *hex_hash;
+ int cnt;
+ struct MD5Context ctx;
- while ((c = getc (f)) != EOF)
- if (c == '"')
- break;
- if (c == EOF)
- return FcFalse;
- if (len == 0)
- return FcFalse;
-
- size = len;
- i = 0;
- d = dest;
- escape = FcFalse;
- while ((c = getc (f)) != EOF)
+ MD5Init (&ctx);
+ MD5Update (&ctx, (const unsigned char *)dir, strlen ((const char *) dir));
+
+ MD5Final (hash, &ctx);
+
+ cache_base[0] = '/';
+ hex_hash = cache_base + 1;
+ for (cnt = 0; cnt < 16; ++cnt)
{
- if (!escape)
- {
- switch (c) {
- case '"':
- c = '\0';
- break;
- case '\\':
- escape = FcTrue;
- continue;
- }
- }
- if (i == size)
- {
- FcChar8 *new = malloc (size * 2);
- if (!new)
- break;
- memcpy (new, d, size);
- size *= 2;
- if (d != dest)
- free (d);
- d = new;
- }
- d[i++] = c;
- if (c == '\0')
- return d;
- escape = FcFalse;
+ hex_hash[2*cnt ] = bin2hex[hash[cnt] >> 4];
+ hex_hash[2*cnt+1] = bin2hex[hash[cnt] & 0xf];
}
- if (d != dest)
- free (d);
- return 0;
+ hex_hash[2*cnt] = 0;
+ strcat ((char *) cache_base, "-" FC_ARCHITECTURE FC_CACHE_SUFFIX);
+
+ return cache_base;
}
-static FcBool
-FcFileCacheReadUlong (FILE *f, unsigned long *dest)
+FcBool
+FcDirCacheUnlink (const FcChar8 *dir, FcConfig *config)
{
- unsigned long t;
- int c;
+ FcChar8 *cache_hashed = NULL;
+ FcChar8 cache_base[CACHEBASE_LEN];
+ FcStrList *list;
+ FcChar8 *cache_dir;
+
+ FcDirCacheBasename (dir, cache_base);
- while ((c = getc (f)) != EOF)
+ list = FcStrListCreate (config->cacheDirs);
+ if (!list)
+ return FcFalse;
+
+ while ((cache_dir = FcStrListNext (list)))
{
- if (!isspace (c))
+ cache_hashed = FcStrPlus (cache_dir, cache_base);
+ if (!cache_hashed)
break;
+ (void) unlink ((char *) cache_hashed);
+ FcStrFree (cache_hashed);
}
- if (c == EOF)
+ FcStrListDone (list);
+ /* return FcFalse if something went wrong */
+ if (cache_dir)
return FcFalse;
- t = 0;
- for (;;)
+ return FcTrue;
+}
+
+static int
+FcDirCacheOpenFile (const FcChar8 *cache_file, struct stat *file_stat)
+{
+ int fd;
+
+#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 (c == EOF || isspace (c))
- break;
- if (!isdigit (c))
- return FcFalse;
- t = t * 10 + (c - '0');
- c = getc (f);
+ close (fd);
+ return -1;
}
- *dest = t;
- return FcTrue;
+#endif
+ return fd;
}
+/*
+ * Look for a cache file for the specified dir. Attempt
+ * to use each one we find, stopping when the callback
+ * indicates success
+ */
static FcBool
-FcFileCacheReadInt (FILE *f, int *dest)
+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)
{
- unsigned long t;
- FcBool ret;
+ int fd = -1;
+ FcChar8 cache_base[CACHEBASE_LEN];
+ FcStrList *list;
+ FcChar8 *cache_dir;
+ struct stat file_stat, dir_stat;
+ FcBool ret = FcFalse;
+
+ if (FcStat (dir, &dir_stat) < 0)
+ return FcFalse;
+
+ FcDirCacheBasename (dir, cache_base);
+
+ list = FcStrListCreate (config->cacheDirs);
+ if (!list)
+ return FcFalse;
+
+ while ((cache_dir = FcStrListNext (list)))
+ {
+ FcChar8 *cache_hashed = FcStrPlus (cache_dir, cache_base);
+ if (!cache_hashed)
+ break;
+ fd = FcDirCacheOpenFile (cache_hashed, &file_stat);
+ if (fd >= 0) {
+ ret = (*callback) (fd, &file_stat, &dir_stat, closure);
+ close (fd);
+ if (ret)
+ {
+ if (cache_file_ret)
+ *cache_file_ret = cache_hashed;
+ else
+ FcStrFree (cache_hashed);
+ break;
+ }
+ }
+ FcStrFree (cache_hashed);
+ }
+ FcStrListDone (list);
- ret = FcFileCacheReadUlong (f, &t);
- if (ret)
- *dest = (int) t;
return ret;
}
-static FcBool
-FcFileCacheReadTime (FILE *f, time_t *dest)
+#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)
{
- unsigned long t;
- FcBool ret;
+ /* tricky bit -- each bit is '1' 75% of the time */
+ long int bits = FcRandom () | FcRandom ();
+ int level = 0;
- ret = FcFileCacheReadUlong (f, &t);
- if (ret)
- *dest = (time_t) t;
- return ret;
+ while (++level < FC_CACHE_MAX_LEVEL)
+ {
+ if (bits & 1)
+ break;
+ bits >>= 1;
+ }
+ return level;
}
+/*
+ * Insert cache into the list
+ */
static FcBool
-FcFileCacheAdd (FcFileCache *cache,
- const FcChar8 *file,
- int id,
- time_t time,
- const FcChar8 *name,
- FcBool replace)
+FcCacheInsert (FcCache *cache, struct stat *cache_stat)
{
- FcFileCacheEnt *c;
- FcFileCacheEnt **prev, *old;
- unsigned int hash;
+ FcCacheSkip **update[FC_CACHE_MAX_LEVEL];
+ FcCacheSkip *s, **next;
+ int i, level;
- if (FcDebug () & FC_DBG_CACHE)
+ /*
+ * 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)
{
- printf ("%s face %s/%d as %s\n", replace ? "Replace" : "Add",
- file, id, name);
+ level = fcCacheMaxLevel + 1;
+ update[fcCacheMaxLevel] = &fcCacheChains[fcCacheMaxLevel];
+ fcCacheMaxLevel = level;
}
- hash = FcFileCacheHash (file);
- for (prev = &cache->ents[hash % FC_FILE_CACHE_HASH_SIZE];
- (old = *prev);
- prev = &(*prev)->next)
+
+ 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)
{
- if (old->hash == hash && old->id == id && !strcmp (old->file, file))
- break;
+ s->cache_dev = cache_stat->st_dev;
+ s->cache_ino = cache_stat->st_ino;
+ s->cache_mtime = cache_stat->st_mtime;
}
- if (*prev)
+ else
{
- if (!replace)
- return FcFalse;
+ s->cache_dev = 0;
+ s->cache_ino = 0;
+ s->cache_mtime = 0;
+ }
- old = *prev;
- if (old->referenced)
- cache->referenced--;
- *prev = old->next;
- free (old);
- cache->entries--;
+ /*
+ * Insert into all fcCacheChains
+ */
+ for (i = 0; i < level; i++)
+ {
+ s->next[i] = *update[i];
+ *update[i] = s;
}
-
- c = malloc (sizeof (FcFileCacheEnt) +
- strlen ((char *) file) + 1 +
- strlen ((char *) name) + 1);
- if (!c)
- return FcFalse;
- c->next = *prev;
- *prev = c;
- c->hash = hash;
- c->file = (FcChar8 *) (c + 1);
- c->id = id;
- c->name = c->file + strlen ((char *) file) + 1;
- strcpy (c->file, file);
- c->time = time;
- c->referenced = replace;
- strcpy (c->name, name);
- cache->entries++;
return FcTrue;
}
-FcFileCache *
-FcFileCacheCreate (void)
+static FcCacheSkip *
+FcCacheFindByAddr (void *object)
{
- FcFileCache *cache;
- int h;
+ int i;
+ FcCacheSkip **next = fcCacheChains;
+ FcCacheSkip *s;
- cache = malloc (sizeof (FcFileCache));
- if (!cache)
- return 0;
- for (h = 0; h < FC_FILE_CACHE_HASH_SIZE; h++)
- cache->ents[h] = 0;
- cache->entries = 0;
- cache->referenced = 0;
- cache->updated = FcFalse;
- return cache;
+ /*
+ * 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;
}
-void
-FcFileCacheDestroy (FcFileCache *cache)
+static void
+FcCacheRemove (FcCache *cache)
{
- FcFileCacheEnt *c, *next;
- int h;
+ FcCacheSkip **update[FC_CACHE_MAX_LEVEL];
+ FcCacheSkip *s, **next;
+ int i;
- for (h = 0; h < FC_FILE_CACHE_HASH_SIZE; h++)
+ /*
+ * Find links along each chain
+ */
+ next = fcCacheChains;
+ for (i = fcCacheMaxLevel; --i >= 0; )
{
- for (c = cache->ents[h]; c; c = next)
+ 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);
+}
+
+static FcCache *
+FcCacheFindByStat (struct stat *cache_stat)
+{
+ FcCacheSkip *s;
+
+ 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)
{
- next = c->next;
- free (c);
+ s->ref++;
+ return s->cache;
}
+ return NULL;
+}
+
+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;
}
- free (cache);
+ FcCacheRemove (cache);
}
void
-FcFileCacheLoad (FcFileCache *cache,
- const FcChar8 *cache_file)
-{
- FILE *f;
- FcChar8 file_buf[8192], *file;
- int id;
- time_t time;
- FcChar8 name_buf[8192], *name;
-
- f = fopen ((char *) cache_file, "r");
- if (!f)
- return;
-
- cache->updated = FcFalse;
- file = 0;
- name = 0;
- while ((file = FcFileCacheReadString (f, file_buf, sizeof (file_buf))) &&
- FcFileCacheReadInt (f, &id) &&
- FcFileCacheReadTime (f, &time) &&
- (name = FcFileCacheReadString (f, name_buf, sizeof (name_buf))))
+FcCacheObjectReference (void *object)
+{
+ FcCacheSkip *skip = FcCacheFindByAddr (object);
+
+ if (skip)
+ skip->ref++;
+}
+
+void
+FcCacheObjectDereference (void *object)
+{
+ FcCacheSkip *skip = FcCacheFindByAddr (object);
+
+ if (skip)
{
- (void) FcFileCacheAdd (cache, file, id, time, name, FcFalse);
- if (file != file_buf)
- free (file);
- if (name != name_buf)
- free (name);
- file = 0;
- name = 0;
+ skip->ref--;
+ if (skip->ref <= 0)
+ FcDirCacheDispose (skip->cache);
}
- if (file && file != file_buf)
- free (file);
- if (name && name != name_buf)
- free (name);
- fclose (f);
}
-FcBool
-FcFileCacheUpdate (FcFileCache *cache,
- const FcChar8 *file,
- int id,
- const FcChar8 *name)
+void
+FcCacheFini (void)
{
- const FcChar8 *match;
- struct stat statb;
- FcBool ret;
+ int i;
- match = file;
-
- if (stat ((char *) file, &statb) < 0)
- return FcFalse;
- ret = FcFileCacheAdd (cache, match, id,
- statb.st_mtime, name, FcTrue);
- if (ret)
- cache->updated = FcTrue;
- return ret;
+ for (i = 0; i < FC_CACHE_MAX_LEVEL; i++)
+ assert (fcCacheChains[i] == NULL);
+ assert (fcCacheMaxLevel == 0);
}
static FcBool
-FcFileCacheWriteString (FILE *f, const FcChar8 *string)
+FcCacheTimeValid (FcCache *cache, struct stat *dir_stat)
{
- char c;
+ struct stat dir_static;
- if (putc ('"', f) == EOF)
- return FcFalse;
- while ((c = *string++))
+ if (!dir_stat)
{
- switch (c) {
- case '"':
- case '\\':
- if (putc ('\\', f) == EOF)
- return FcFalse;
- /* fall through */
- default:
- if (putc (c, f) == EOF)
- return FcFalse;
- }
+ if (FcStat (FcCacheDir (cache), &dir_static) < 0)
+ return FcFalse;
+ dir_stat = &dir_static;
}
- if (putc ('"', f) == EOF)
- return FcFalse;
- 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 FcBool
-FcFileCacheWriteUlong (FILE *f, unsigned long t)
+/*
+ * Map a cache file into memory
+ */
+static FcCache *
+FcDirCacheMapFd (int fd, struct stat *fd_stat, struct stat *dir_stat)
{
- int pow;
- unsigned long temp, digit;
+ FcCache *cache;
+ FcBool allocated = FcFalse;
- temp = t;
- pow = 1;
- while (temp >= 10)
+ if (fd_stat->st_size < sizeof (FcCache))
+ return NULL;
+ cache = FcCacheFindByStat (fd_stat);
+ if (cache)
{
- temp /= 10;
- pow *= 10;
+ if (FcCacheTimeValid (cache, dir_stat))
+ return cache;
+ FcDirCacheUnload (cache);
+ cache = NULL;
}
- temp = t;
- while (pow)
+
+ /*
+ * 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)
{
- digit = temp / pow;
- if (putc ((char) digit + '0', f) == EOF)
- return FcFalse;
- temp = temp - pow * digit;
- pow = pow / 10;
+#if defined(HAVE_MMAP) || defined(__CYGWIN__)
+ cache = mmap (0, fd_stat->st_size, PROT_READ, MAP_SHARED, fd, 0);
+ if (cache == MAP_FAILED)
+ cache = NULL;
+#elif defined(_WIN32)
+ {
+ 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);
+ }
+ }
+#endif
+ }
+ if (!cache)
+ {
+ cache = malloc (fd_stat->st_size);
+ if (!cache)
+ return NULL;
+
+ if (read (fd, cache, fd_stat->st_size) != fd_stat->st_size)
+ {
+ 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
+ }
+ return NULL;
}
+
+ /* 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;
}
+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;
+}
+
+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);
+ return cache;
+}
+
+/*
+ * Validate a cache file by reading the header and checking
+ * the magic number and the size field
+ */
static FcBool
-FcFileCacheWriteInt (FILE *f, int i)
+FcDirCacheValidateHelper (int fd, struct stat *fd_stat, struct stat *dir_stat, void *closure)
{
- return FcFileCacheWriteUlong (f, (unsigned long) i);
+ 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;
}
static FcBool
-FcFileCacheWriteTime (FILE *f, time_t t)
+FcDirCacheValidConfig (const FcChar8 *dir, FcConfig *config)
{
- return FcFileCacheWriteUlong (f, (unsigned long) t);
+ return FcDirCacheProcess (config, dir,
+ FcDirCacheValidateHelper,
+ NULL, NULL);
}
FcBool
-FcFileCacheSave (FcFileCache *cache,
- const FcChar8 *cache_file)
-{
- FcChar8 *lck;
- FcChar8 *tmp;
- FILE *f;
- int h;
- FcFileCacheEnt *c;
-
- if (!cache->updated && cache->referenced == cache->entries)
- return FcTrue;
-
- lck = malloc (strlen ((char *) cache_file)*2 + 4);
- if (!lck)
- goto bail0;
- tmp = lck + strlen ((char *) cache_file) + 2;
- strcpy ((char *) lck, (char *) cache_file);
- strcat ((char *) lck, "L");
- strcpy ((char *) tmp, (char *) cache_file);
- strcat ((char *) tmp, "T");
- if (link ((char *) lck, (char *) cache_file) < 0 && errno != ENOENT)
+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;
+
+ if (!serialize)
+ return NULL;
+ /*
+ * Space for cache structure
+ */
+ cache_offset = FcSerializeReserve (serialize, sizeof (FcCache));
+ /*
+ * Directory name
+ */
+ if (!FcStrSerializeAlloc (serialize, dir))
goto bail1;
- if (access ((char *) tmp, F_OK) == 0)
- goto bail2;
- f = fopen ((char *) tmp, "w");
- if (!f)
+ /*
+ * 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;
+
+ /*
+ * 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);
- for (h = 0; h < FC_FILE_CACHE_HASH_SIZE; h++)
+ /*
+ * 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++)
{
- 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;
- }
+ FcChar8 *d_serialize = FcStrSerialize (serialize, dirs->strs[i]);
+ if (!d_serialize)
+ goto bail2;
+ dirs_serialize[i] = FcPtrToOffset (dirs_serialize, d_serialize);
}
- if (fclose (f) == EOF)
- goto bail3;
-
- if (rename ((char *) tmp, (char *) cache_file) < 0)
- goto bail3;
-
- unlink ((char *) lck);
- cache->updated = FcFalse;
- return FcTrue;
+ /*
+ * Serialize font set
+ */
+ set_serialize = FcFontSetSerialize (serialize, set);
+ if (!set_serialize)
+ goto bail2;
+ cache->set = FcPtrToOffset (cache, set_serialize);
+
+ FcSerializeDestroy (serialize);
+
+ FcCacheInsert (cache, NULL);
+
+ return cache;
-bail4:
- fclose (f);
-bail3:
- unlink ((char *) tmp);
bail2:
- unlink ((char *) lck);
+ free (cache);
bail1:
- free (lck);
-bail0:
- return FcFalse;
+ 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, 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
-FcFileCacheReadDir (FcFontSet *set, const FcChar8 *cache_file)
+FcDirCacheWrite (FcCache *cache, FcConfig *config)
{
- FcPattern *font;
- FILE *f;
- FcChar8 *path;
- FcChar8 *base;
- FcChar8 file_buf[8192], *file;
- int id;
- FcChar8 name_buf[8192], *name;
- FcBool ret = FcFalse;
+ FcChar8 *dir = FcCacheDir (cache);
+ FcChar8 cache_base[CACHEBASE_LEN];
+ FcChar8 *cache_hashed;
+ int fd;
+ FcAtomic *atomic;
+ FcStrList *list;
+ FcChar8 *cache_dir = NULL;
+ FcChar8 *test_dir;
+ FcCacheSkip *skip;
+ struct stat cache_stat;
+ int magic;
+ int written;
- if (FcDebug () & FC_DBG_CACHE)
- {
- printf ("FcFileCacheReadDir cache_file \"%s\"\n", cache_file);
- }
-
- f = fopen ((char *) cache_file, "r");
- if (!f)
- {
- if (FcDebug () & FC_DBG_CACHE)
+ /*
+ * 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)
{
- printf (" no cache file\n");
+ cache_dir = test_dir;
+ break;
}
- goto bail0;
- }
-
- base = (FcChar8 *) strrchr ((char *) 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);
-
- file = 0;
- name = 0;
- while ((file = FcFileCacheReadString (f, file_buf, sizeof (file_buf))) &&
- FcFileCacheReadInt (f, &id) &&
- (name = FcFileCacheReadString (f, name_buf, sizeof (name_buf))))
- {
- font = FcNameParse (name);
- if (font)
+ else
{
- strcpy (base, file);
- if (FcDebug () & FC_DBG_CACHEV)
+ /*
+ * 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)
{
- printf (" dir cache file \"%s\"\n", file);
+ cache_dir = test_dir;
+ break;
}
- FcPatternAddString (font, FC_FILE, path);
- if (!FcFontSetAdd (set, font))
- goto bail2;
}
- if (file != file_buf)
- free (file);
- if (name != name_buf)
- free (name);
- file = name = 0;
}
+ FcStrListDone (list);
+ if (!cache_dir)
+ return FcFalse;
+
+ FcDirCacheBasename (dir, cache_base);
+ cache_hashed = FcStrPlus (cache_dir, cache_base);
+ if (!cache_hashed)
+ return FcFalse;
+
if (FcDebug () & FC_DBG_CACHE)
+ printf ("FcDirCacheWriteDir dir \"%s\" file \"%s\"\n",
+ dir, cache_hashed);
+
+ atomic = FcAtomicCreate ((FcChar8 *)cache_hashed);
+ if (!atomic)
+ goto bail1;
+
+ if (!FcAtomicLock (atomic))
+ goto bail3;
+
+ fd = open((char *)FcAtomicNewFile (atomic), O_RDWR | O_CREAT | O_BINARY, 0666);
+ if (fd == -1)
+ 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 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)
{
- printf (" cache loaded\n");
+ perror ("write cache");
+ goto bail5;
}
-
- ret = FcTrue;
-bail2:
- free (path);
- if (file && file != file_buf)
- free (file);
- if (name && name != name_buf)
- free (name);
-bail1:
- fclose (f);
-bail0:
- return ret;
+
+ 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;
+
+ bail5:
+ close (fd);
+ bail4:
+ FcAtomicUnlock (atomic);
+ bail3:
+ FcAtomicDestroy (atomic);
+ bail1:
+ FcStrFree (cache_hashed);
+ return FcFalse;
}
-FcBool
-FcFileCacheWriteDir (FcFontSet *set, const FcChar8 *cache_file)
+/*
+ * 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)
{
- FcPattern *font;
- FILE *f;
- FcChar8 *name;
- const FcChar8 *file, *base;
- int n;
- int id;
- FcBool ret;
+ return FcCacheDir (c);
+}
- if (FcDebug () & FC_DBG_CACHE)
- printf ("FcFileCacheWriteDir cache_file \"%s\"\n", cache_file);
-
- f = fopen ((char *) cache_file, "w");
- if (!f)
+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++)
{
- if (FcDebug () & FC_DBG_CACHE)
- printf (" can't create \"%s\"\n", cache_file);
- goto bail0;
+ FcPattern *font = FcFontSetFont (old, i);
+
+ FcPatternReference (font);
+ if (!FcFontSetAdd (new, font))
+ {
+ FcFontSetDestroy (new);
+ return NULL;
+ }
}
- for (n = 0; n < set->nfont; n++)
- {
- font = set->fonts[n];
- if (FcPatternGetString (font, FC_FILE, 0, (FcChar8 **) &file) != FcResultMatch)
- goto bail1;
- base = (FcChar8 *) strrchr ((char *) 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;
+ return new;
+}
+
+const FcChar8 *
+FcCacheSubdir args2(const FcCache *c, int i)
+{
+ return FcCacheSubdir (c, i);
+}
+
+int
+FcCacheNumSubdir args1(const FcCache *c)
+{
+ return c->dirs_count;
+}
+
+int
+FcCacheNumFont args1(const FcCache *c)
+{
+ return FcCacheSet(c)->nfont;
+}
+
+/*
+ * 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.
+ */
+
+#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
+
+/*
+ * Start MD5 accumulation. Set bit count to 0 and buffer to mysterious
+ * initialization constants.
+ */
+static void MD5Init(struct MD5Context *ctx)
+{
+ ctx->buf[0] = 0x67452301;
+ ctx->buf[1] = 0xefcdab89;
+ ctx->buf[2] = 0x98badcfe;
+ ctx->buf[3] = 0x10325476;
+
+ ctx->bits[0] = 0;
+ ctx->bits[1] = 0;
+}
+
+/*
+ * 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;
+
+ /* 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;
+
+ t = (t >> 3) & 0x3f; /* Bytes already in shsInfo->data */
+
+ /* Handle any leading odd-sized chunks */
+
+ if (t) {
+ unsigned char *p = (unsigned char *) ctx->in + t;
+
+ 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;
}
- if (fclose (f) == EOF)
- goto bail0;
-
- if (FcDebug () & FC_DBG_CACHE)
- printf (" cache written\n");
- return FcTrue;
-
-bail1:
- fclose (f);
-bail0:
- unlink ((char *) cache_file);
- return FcFalse;
+ /* 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;
+ }
+
+ /* Handle any remaining bytes of data. */
+
+ memcpy(ctx->in, buf, len);
+}
+
+/*
+ * 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)
+{
+ 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);
+
+ /* Append length in bits and transform */
+ ((FcChar32 *) ctx->in)[14] = ctx->bits[0];
+ ((FcChar32 *) ctx->in)[15] = ctx->bits[1];
+
+ 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 */
+}
+
+
+/* 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])
+{
+ 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__
git.wh0rd.org / fontconfig.git / blobdiff