Add support for LZMA uncompression algorithm.

Signed-off-by: Luigi 'Comio' Mantellini <luigi.mantellini@idf-hit.com>
Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>

1 files changed, 142 insertions, 0 deletions

diff --git a/lib_generic/lzma/LzmaTools.c b/lib_generic/lzma/LzmaTools.c
new file mode 100644
index 0000000..5ac42e5
--- /dev/null
+++ b/lib_generic/lzma/LzmaTools.c
@@ -0,0 +1,142 @@
+/*
+ * Usefuls routines based on the LzmaTest.c file from LZMA SDK 4.57
+ *
+ * Copyright (C) 2007-2008 Industrie Dial Face S.p.A.
+ * Luigi 'Comio' Mantellini (luigi.mantellini@idf-hit.com)
+ *
+ * Copyright (C) 1999-2005 Igor Pavlov
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * 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 of
+ * the License, 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, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+/*
+ * LZMA_Alone stream format:
+ *
+ * uchar   Properties[5]
+ * uint64  Uncompressed size
+ * uchar   data[*]
+ *
+ */
+
+#include <config.h>
+#include <common.h>
+
+#ifdef CONFIG_LZMA
+
+#define LZMA_PROPERTIES_OFFSET 0
+#define LZMA_SIZE_OFFSET       LZMA_PROPERTIES_SIZE
+#define LZMA_DATA_OFFSET       LZMA_SIZE_OFFSET+sizeof(uint64_t)
+
+#include "LzmaTools.h"
+#include "LzmaDecode.h"
+
+#include <linux/string.h>
+#include <malloc.h>
+
+int lzmaBuffToBuffDecompress (unsigned char *outStream, SizeT *uncompressedSize,
+			      unsigned char *inStream,  SizeT  length)
+{
+	int res = LZMA_RESULT_DATA_ERROR;
+	int i;
+
+	SizeT outSizeFull = 0xFFFFFFFF; /* 4GBytes limit */
+	SizeT inProcessed;
+	SizeT outProcessed;
+	SizeT outSize;
+	SizeT outSizeHigh;
+	CLzmaDecoderState state;  /* it's about 24-80 bytes structure, if int is 32-bit */
+	unsigned char properties[LZMA_PROPERTIES_SIZE];
+	SizeT compressedSize = (SizeT)(length - LZMA_DATA_OFFSET);
+
+	debug ("LZMA: Image address............... 0x%lx\n", inStream);
+	debug ("LZMA: Properties address.......... 0x%lx\n", inStream + LZMA_PROPERTIES_OFFSET);
+	debug ("LZMA: Uncompressed size address... 0x%lx\n", inStream + LZMA_SIZE_OFFSET);
+	debug ("LZMA: Compressed data address..... 0x%lx\n", inStream + LZMA_DATA_OFFSET);
+	debug ("LZMA: Destination address......... 0x%lx\n", outStream);
+
+	memcpy(properties, inStream + LZMA_PROPERTIES_OFFSET, LZMA_PROPERTIES_SIZE);
+
+	memset(&state, 0, sizeof(state));
+	res = LzmaDecodeProperties(&state.Properties,
+				 properties,
+				 LZMA_PROPERTIES_SIZE);
+	if (res != LZMA_RESULT_OK) {
+		return res;
+	}
+
+	outSize = 0;
+	outSizeHigh = 0;
+	/* Read the uncompressed size */
+	for (i = 0; i < 8; i++) {
+		unsigned char b = inStream[LZMA_SIZE_OFFSET + i];
+	        if (i < 4) {
+		        outSize     += (UInt32)(b) << (i * 8);
+		} else {
+	                outSizeHigh += (UInt32)(b) << ((i - 4) * 8);
+		}
+	}
+
+	outSizeFull = (SizeT)outSize;
+	if (sizeof(SizeT) >= 8) {
+		/*
+	         * SizeT is a 64 bit uint => We can manage files larger than 4GB!
+		 *
+		 */
+	        outSizeFull |= (((SizeT)outSizeHigh << 16) << 16);
+	} else if (outSizeHigh != 0 || (UInt32)(SizeT)outSize != outSize) {
+	        /*
+		 * SizeT is a 32 bit uint => We cannot manage files larger than
+		 * 4GB!
+		 *
+		 */
+		debug ("LZMA: 64bit support not enabled.\n");
+	        return LZMA_RESULT_DATA_ERROR;
+	}
+
+	debug ("LZMA: Uncompresed size............ 0x%lx\n", outSizeFull);
+	debug ("LZMA: Compresed size.............. 0x%lx\n", compressedSize);
+	debug ("LZMA: Dynamic memory needed....... 0x%lx", LzmaGetNumProbs(&state.Properties) * sizeof(CProb));
+
+	state.Probs = (CProb *)malloc(LzmaGetNumProbs(&state.Properties) * sizeof(CProb));
+
+	if (state.Probs == 0
+	    || (outStream == 0 && outSizeFull != 0)
+	    || (inStream == 0 && compressedSize != 0)) {
+		free(state.Probs);
+		debug ("\n");
+		return LZMA_RESULT_DATA_ERROR;
+	}
+
+	debug (" allocated.\n");
+
+	/* Decompress */
+
+	res = LzmaDecode(&state,
+		inStream + LZMA_DATA_OFFSET, compressedSize, &inProcessed,
+		outStream, outSizeFull,  &outProcessed);
+	if (res != LZMA_RESULT_OK)  {
+		return res;
+	}
+
+	*uncompressedSize = outProcessed;
+	free(state.Probs);
+	return res;
+}
+
+#endif