and added missing files... I have git commit -a :-)

[bcm963xx.git] / hostTools / squashfs / mksquashfs.h

diff --git a/hostTools/squashfs/mksquashfs.h b/hostTools/squashfs/mksquashfs.h
new file mode 100755 (executable)
index 0000000..b3d2e44
--- /dev/null
+++ b/hostTools/squashfs/mksquashfs.h
@@ -0,0 +1,47 @@
+/*
+ * macros to convert each packed bitfield structure from little endian to big
+ * endian and vice versa.  These are needed when creating a filesystem on a
+ * machine with different byte ordering to the target architecture.
+ *
+ * Copyright (c) 2002, 2003, 2004 Phillip Lougher <plougher@users.sourceforge.net>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2,
+ * or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ *
+ * mksquashfs.h
+ *
+ */
+
+/*
+ * macros used to swap each structure entry, taking into account
+ * bitfields and different bitfield placing conventions on differing architectures
+ */
+#if __BYTE_ORDER == __BIG_ENDIAN
+       /* convert from big endian to little endian */
+#define SQUASHFS_SWAP(value, p, pos, tbits) _SQUASHFS_SWAP(value, p, pos, tbits, b_pos)
+#else
+       /* convert from little endian to big endian */ 
+#define SQUASHFS_SWAP(value, p, pos, tbits) _SQUASHFS_SWAP(value, p, pos, tbits, 64 - tbits - b_pos)
+#endif
+
+#define _SQUASHFS_SWAP(value, p, pos, tbits, SHIFT) {\
+       int bits;\
+       int b_pos = pos % 8;\
+       unsigned long long val = (long long) value << (SHIFT);\
+       unsigned char *s = ((unsigned char *) &val) + 7;\
+       unsigned char *d = ((unsigned char *)p) + (pos / 8);\
+       for(bits = 0; bits < (tbits + b_pos); bits += 8) \
+               *d++ |= *s--;\
+}
+#define SQUASHFS_MEMSET(s, d, n)       memset(d, 0, n);