From d3925ba5bd25224bc4a60d3d6a107c464994a1ea Mon Sep 17 00:00:00 2001
From: ulf69 <ulf69>
Date: Wed, 15 Sep 2004 17:53:22 +0000
Subject: initial revision

---
(limited to 'pwmanager/pwmanager/compressbzip2.cpp')

diff --git a/pwmanager/pwmanager/compressbzip2.cpp b/pwmanager/pwmanager/compressbzip2.cpp
new file mode 100644
index 0000000..c3a9edd
--- a/dev/null
+++ b/pwmanager/pwmanager/compressbzip2.cpp
@@ -0,0 +1,138 @@
+/***************************************************************************
+ *                                                                         *
+ *   copyright (C) 2003, 2004 by Michael Buesch                            *
+ *   email: mbuesch@freenet.de                                             *
+ *                                                                         *
+ *   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.                         *
+ *                                                                         *
+ ***************************************************************************/
+
+/***************************************************************************
+ * copyright (C) 2004 by Ulf Schenk
+ * This file is originaly based on version 1.0.1 of pwmanager
+ * and was modified to run on embedded devices that run microkde
+ *
+ * $Id$
+ **************************************************************************/  
+
+#include "compressbzip2.h"
+
+#include <stdlib.h>
+
+#define BZ_NO_STDIO
+#include <bzlib.h>
+
+#define BZ_BLOCK_SIZE				9
+#define BZ_WORK_FACTOR				30
+#define EXPAND_COMPRESS_DESTBUF_BYTES		1024
+#define EXPAND_DECOMPRESS_DESTBUF_BYTES		(1024 * 10)
+
+
+bool CompressBzip2::compress(string *d)
+{
+	int ret;
+	char *dest, *source;
+	unsigned int sourceLen, destLen;
+
+	sourceLen = d->length();
+	destLen = calcCompressDestLen(sourceLen);
+	source = static_cast<char *>(malloc(sourceLen));
+	if (!source)
+		return false;
+	memcpy(source, d->c_str(), sourceLen);
+	dest = static_cast<char *>(malloc(destLen));
+	if (!dest) {
+		free(source);
+		return false;
+	}
+	while (1) {
+		ret = BZ2_bzBuffToBuffCompress(dest,
+					       &destLen,
+					       source,
+					       sourceLen,
+					       BZ_BLOCK_SIZE,
+					       0,
+					       BZ_WORK_FACTOR);
+		switch (ret) {
+		case BZ_OK:
+			goto out;
+		case BZ_OUTBUFF_FULL:
+			/* we don't use realloc(), because it may
+			 * (in this case) unneccessarily copy the old block
+			 * to the new allocated block.
+			 */
+			free(dest);
+			destLen += EXPAND_COMPRESS_DESTBUF_BYTES;
+			dest = static_cast<char *>(malloc(destLen));
+			if (!dest) {
+				free(source);
+				return false;
+			}
+			break;
+		default:
+			free(source),
+			free(dest);
+			return false;
+		}
+	}
+out:
+	free(source);
+	d->assign(dest, destLen);
+	free(dest);
+	return true;
+}
+
+bool CompressBzip2::decompress(string *d)
+{
+	int ret;
+	char *dest, *source;
+	unsigned int sourceLen, destLen;
+
+	sourceLen = d->length();
+	destLen = calcDecompressDestLen(sourceLen);
+	source = static_cast<char *>(malloc(sourceLen));
+	if (!source)
+		return false;
+	memcpy(source, d->c_str(), sourceLen);
+	dest = static_cast<char *>(malloc(destLen));
+	if (!dest) {
+		free(source);
+		return false;
+	}
+	while (1) {
+		ret = BZ2_bzBuffToBuffDecompress(dest,
+						 &destLen,
+						 source,
+						 sourceLen,
+						 0,
+						 0);
+		switch (ret) {
+		case BZ_OK:
+			goto out;
+		case BZ_OUTBUFF_FULL:
+			/* we don't use realloc(), because it may
+			 * (in this case) unneccessarily copy the old block
+			 * to the new allocated block.
+			 */
+			free(dest);
+			destLen += EXPAND_DECOMPRESS_DESTBUF_BYTES;
+			dest = static_cast<char *>(malloc(destLen));
+			if (!dest) {
+				free(source);
+				return false;
+			}
+			break;
+		default:
+			free(source),
+			free(dest);
+			return false;
+		}
+	}
+out:
+	free(source);
+	d->assign(dest, destLen);
+	free(dest);
+	return true;
+}
--
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