From 5c105d9f3fd086aff195d3849dcf847d6b0bd927 Mon Sep 17 00:00:00 2001
From: blogic <blogic@3c298f89-4303-0410-b956-a3cf2f4a3e73>
Date: Fri, 5 Oct 2012 10:12:53 +0000
Subject: branch Attitude Adjustment

git-svn-id: svn://svn.openwrt.org/openwrt/branches/attitude_adjustment@33625 3c298f89-4303-0410-b956-a3cf2f4a3e73
---
 .../310-lib-add-rle-decompression.patch            | 114 +++++++++++++++++++++
 1 file changed, 114 insertions(+)
 create mode 100644 target/linux/ar71xx/patches-3.3/310-lib-add-rle-decompression.patch

(limited to 'target/linux/ar71xx/patches-3.3/310-lib-add-rle-decompression.patch')

diff --git a/target/linux/ar71xx/patches-3.3/310-lib-add-rle-decompression.patch b/target/linux/ar71xx/patches-3.3/310-lib-add-rle-decompression.patch
new file mode 100644
index 000000000..0cb946229
--- /dev/null
+++ b/target/linux/ar71xx/patches-3.3/310-lib-add-rle-decompression.patch
@@ -0,0 +1,114 @@
+--- a/lib/Kconfig
++++ b/lib/Kconfig
+@@ -124,6 +124,9 @@ config LZMA_COMPRESS
+ config LZMA_DECOMPRESS
+     tristate
+ 
++config RLE_DECOMPRESS
++	tristate
++
+ #
+ # These all provide a common interface (hence the apparent duplication with
+ # ZLIB_INFLATE; DECOMPRESS_GZIP is just a wrapper.)
+--- a/lib/Makefile
++++ b/lib/Makefile
+@@ -85,6 +85,7 @@ obj-$(CONFIG_XZ_DEC) += xz/
+ obj-$(CONFIG_RAID6_PQ) += raid6/
+ obj-$(CONFIG_LZMA_COMPRESS) += lzma/
+ obj-$(CONFIG_LZMA_DECOMPRESS) += lzma/
++obj-$(CONFIG_RLE_DECOMPRESS) += rle.o
+ 
+ lib-$(CONFIG_DECOMPRESS_GZIP) += decompress_inflate.o
+ lib-$(CONFIG_DECOMPRESS_BZIP2) += decompress_bunzip2.o
+--- /dev/null
++++ b/include/linux/rle.h
+@@ -0,0 +1,8 @@
++#ifndef _RLE_H_
++#define _RLE_H_
++
++int rle_decode(const unsigned char *src, size_t srclen,
++	       unsigned char *dst, size_t dstlen,
++	       size_t *src_done, size_t *dst_done);
++
++#endif /* _RLE_H_ */
+--- /dev/null
++++ b/lib/rle.c
+@@ -0,0 +1,78 @@
++/*
++ *  RLE decoding routine
++ *
++ *  Copyright (C) 2012 Gabor Juhos <juhosg@openwrt.org>
++ *
++ *  This program is free software; you can redistribute it and/or modify it
++ *  under the terms of the GNU General Public License version 2 as published
++ *  by the Free Software Foundation.
++ */
++
++#include <linux/kernel.h>
++#include <linux/module.h>
++#include <linux/rle.h>
++
++int rle_decode(const unsigned char *src, size_t srclen,
++	       unsigned char *dst, size_t dstlen,
++	       size_t *src_done, size_t *dst_done)
++{
++	size_t srcpos, dstpos;
++	int ret;
++
++	srcpos = 0;
++	dstpos = 0;
++	ret = -EINVAL;
++
++	/* sanity checks */
++	if (!src || !srclen || !dst || !dstlen)
++		goto out;
++
++	while (1) {
++		char count;
++
++		if (srcpos >= srclen)
++			break;
++
++		count = (char) src[srcpos++];
++		if (count == 0) {
++			ret = 0;
++			break;
++		}
++
++		if (count > 0) {
++			unsigned char c;
++
++			if (srcpos >= srclen)
++				break;
++
++			c = src[srcpos++];
++
++			while (count--) {
++				if (dstpos >= dstlen)
++					break;
++
++				dst[dstpos++] = c;
++			}
++		} else {
++			count *= -1;
++
++			while (count--) {
++				if (srcpos >= srclen)
++					break;
++				if (dstpos >= dstlen)
++					break;
++				dst[dstpos++] = src[srcpos++];
++			}
++		}
++	}
++
++out:
++	if (src_done)
++		*src_done = srcpos;
++	if (dst_done)
++		*dst_done = dstpos;
++
++	return ret;
++}
++
++EXPORT_SYMBOL_GPL(rle_decode);
-- 
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