fontconfig libX11 mesa pixman xserver git update 29 May 2012

1 files changed, 308 insertions, 0 deletions

diff --git a/fontconfig/src/fcstat.c b/fontconfig/src/fcstat.c
new file mode 100644
index 000000000..c2d9fe9ee
--- /dev/null
+++ b/fontconfig/src/fcstat.c
@@ -0,0 +1,308 @@
+/*
+ * 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 the author(s) not be used in
+ * advertising or publicity pertaining to distribution of the software without
+ * 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.
+ *
+ * THE AUTHOR(S) DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
+ * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
+ * EVENT SHALL THE AUTHOR(S) BE LIABLE FOR ANY SPECIAL, INDIRECT OR
+ * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
+ * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
+ * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
+ * PERFORMANCE OF THIS SOFTWARE.
+ */
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+#include "fcint.h"
+#include "fcarch.h"
+#include <dirent.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#ifdef HAVE_SYS_VFS_H
+#include <sys/vfs.h>
+#endif
+#ifdef HAVE_SYS_STATFS_H
+#include <sys/statfs.h>
+#endif
+#ifdef HAVE_SYS_PARAM_H
+#include <sys/param.h>
+#endif
+#ifdef HAVE_SYS_MOUNT_H
+#include <sys/mount.h>
+#endif
+
+#ifdef _WIN32
+
+#include <windows.h>
+
+#ifdef __GNUC__
+typedef long long INT64;
+#define EPOCH_OFFSET 11644473600ll
+#else
+#define EPOCH_OFFSET 11644473600i64
+typedef __int64 INT64;
+#endif
+
+/* Workaround for problems in the stat() in the Microsoft C library:
+ *
+ * 1) stat() uses FindFirstFile() to get the file
+ * attributes. Unfortunately this API doesn't return correct values
+ * for modification time of a directory until some time after a file
+ * or subdirectory has been added to the directory. (This causes
+ * run-test.sh to fail, for instance.) GetFileAttributesEx() is
+ * better, it returns the updated timestamp right away.
+ *
+ * 2) stat() does some strange things related to backward
+ * compatibility with the local time timestamps on FAT volumes and
+ * daylight saving time. This causes problems after the switches
+ * to/from daylight saving time. See
+ * http://bugzilla.gnome.org/show_bug.cgi?id=154968 , especially
+ * comment #30, and http://www.codeproject.com/datetime/dstbugs.asp .
+ * We don't need any of that, FAT and Win9x are as good as dead. So
+ * just use the UTC timestamps from NTFS, converted to the Unix epoch.
+ */
+
+int
+FcStat (const FcChar8 *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 FcChar8 *file, struct stat *statb)
+{
+  return stat ((char *) file, statb);
+}
+
+#endif
+
+/* Adler-32 checksum implementation */
+struct Adler32 {
+    int a;
+    int b;
+};
+
+static void
+Adler32Init (struct Adler32 *ctx)
+{
+    ctx->a = 1;
+    ctx->b = 0;
+}
+
+static void
+Adler32Update (struct Adler32 *ctx, const char *data, int data_len)
+{
+    while (data_len--)
+    {
+	ctx->a = (ctx->a + *data++) % 65521;
+	ctx->b = (ctx->b + ctx->a) % 65521;
+    }
+}
+
+static int
+Adler32Finish (struct Adler32 *ctx)
+{
+    return ctx->a + (ctx->b << 16);
+}
+
+/* dirent.d_type can be relied upon on FAT filesystem */
+static FcBool
+FcDirChecksumScandirFilter(const struct dirent *entry)
+{
+    return entry->d_type != DT_DIR;
+}
+
+static int
+FcDirChecksumScandirSorter(const struct dirent **lhs, const struct dirent **rhs)
+{
+    return strcmp((*lhs)->d_name, (*rhs)->d_name);
+}
+
+static int
+FcDirChecksum (const FcChar8 *dir, time_t *checksum)
+{
+    struct Adler32 ctx;
+    struct dirent **files;
+    int n;
+
+    Adler32Init (&ctx);
+
+    n = scandir ((const char *)dir, &files,
+                 &FcDirChecksumScandirFilter,
+                 &FcDirChecksumScandirSorter);
+    if (n == -1)
+        return -1;
+
+    while (n--)
+    {
+        Adler32Update (&ctx, files[n]->d_name, strlen(files[n]->d_name) + 1);
+        Adler32Update (&ctx, (char *)&files[n]->d_type, sizeof(files[n]->d_type));
+        free(files[n]);
+    }
+    free(files);
+
+    *checksum = Adler32Finish (&ctx);
+    return 0;
+}
+
+int
+FcStatChecksum (const FcChar8 *file, struct stat *statb)
+{
+    if (FcStat (file, statb) == -1)
+        return -1;
+
+    if (FcIsFsMtimeBroken (file))
+    {
+        if (FcDirChecksum (file, &statb->st_mtime) == -1)
+            return -1;
+    }
+
+    return 0;
+}
+
+static int
+FcFStatFs (int fd, FcStatFS *statb)
+{
+    const char *p = NULL;
+    int ret;
+    FcBool flag = FcFalse;
+
+    memset (statb, 0, sizeof (FcStatFS));
+
+#if defined(HAVE_FSTATVFS) && (defined(HAVE_STRUCT_STATVFS_F_BASETYPE) || defined(HAVE_STRUCT_STATVFS_F_FSTYPENAME))
+    struct statvfs buf;
+
+    if ((ret = fstatvfs (fd, &buf)) == 0)
+    {
+#  if defined(HAVE_STRUCT_STATVFS_F_BASETYPE)
+	p = buf.f_basetype;
+#  elif defined(HAVE_STRUCT_STATVFS_F_FSTYPENAME)
+	p = buf.f_fstypename;
+#  endif
+    }
+#elif defined(HAVE_FSTATFS) && (defined(HAVE_STRUCT_STATFS_F_FLAGS) || defined(HAVE_STRUCT_STATFS_F_FSTYPENAME) || defined(__linux__))
+    struct statfs buf;
+
+    if ((ret = fstatfs (fd, &buf)) == 0)
+    {
+#  if defined(HAVE_STRUCT_STATFS_F_FLAGS) && defined(MNT_LOCAL)
+	statb->is_remote_fs = !(buf.f_flags & MNT_LOCAL);
+	flag = FcTrue;
+#  endif
+#  if defined(HAVE_STRUCT_STATFS_F_FSTYPENAME)
+	p = buf.f_fstypename;
+#  elif defined(__linux__)
+	switch (buf.f_type)
+	{
+	case 0x6969: /* nfs */
+	    statb->is_remote_fs = FcTrue;
+	    break;
+	case 0x4d44: /* fat */
+	    statb->is_mtime_broken = FcTrue;
+	    break;
+	default:
+	    break;
+	}
+
+	return ret;
+#  else
+#    error "BUG: No way to figure out with fstatfs()"
+#  endif
+    }
+#endif
+    if (p)
+    {
+	if (!flag && strcmp (p, "nfs") == 0)
+	    statb->is_remote_fs = FcTrue;
+	if (strcmp (p, "msdosfs") == 0 ||
+	    strcmp (p, "pcfs") == 0)
+	    statb->is_mtime_broken = FcTrue;
+    }
+
+    return ret;
+}
+
+FcBool
+FcIsFsMmapSafe (int fd)
+{
+    FcStatFS statb;
+
+    if (FcFStatFs (fd, &statb) < 0)
+	return FcTrue;
+
+    return !statb.is_remote_fs;
+}
+
+FcBool
+FcIsFsMtimeBroken (const FcChar8 *dir)
+{
+    int fd = open ((const char *) dir, O_RDONLY);
+
+    if (fd != -1)
+    {
+	FcStatFS statb;
+	int ret = FcFStatFs (fd, &statb);
+
+	close (fd);
+	if (ret < 0)
+	    return FcFalse;
+
+	return statb.is_mtime_broken;
+    }
+
+    return FcFalse;
+}