ssl/libcrypto/src/crypto/comp/c_rle.c
changeset 31 ce057bb09d0b
parent 0 e4d67989cc36
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/ssl/libcrypto/src/crypto/comp/c_rle.c	Fri Jun 04 16:20:51 2010 +0100
@@ -0,0 +1,111 @@
+/*
+Copyright (c) 2009 Nokia Corporation and/or its subsidiary(-ies). All rights reserved.
+
+Redistribution and use in source and binary forms, with or without 
+modification, are permitted provided that the following conditions are met:
+
+* Redistributions of source code must retain the above copyright notice, this 
+  list of conditions and the following disclaimer.
+* Redistributions in binary form must reproduce the above copyright notice, 
+  this list of conditions and the following disclaimer in the documentation 
+  and/or other materials provided with the distribution.
+* Neither the name of Nokia Corporation nor the names of its contributors 
+  may be used to endorse or promote products derived from this software 
+  without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 
+AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 
+IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 
+DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE 
+FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 
+DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 
+SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER 
+CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 
+OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+Description:
+*/
+
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <openssl/objects.h>
+#include <openssl/comp.h>
+#if (defined(SYMBIAN) && (defined(__WINSCW__) || defined(__WINS__)))
+#include "libcrypto_wsd_macros.h"
+#include "libcrypto_wsd.h"
+#endif
+
+static int rle_compress_block(COMP_CTX *ctx, unsigned char *out,
+	unsigned int olen, unsigned char *in, unsigned int ilen);
+static int rle_expand_block(COMP_CTX *ctx, unsigned char *out,
+	unsigned int olen, unsigned char *in, unsigned int ilen);
+
+#ifndef EMULATOR
+static COMP_METHOD rle_method={
+	NID_rle_compression,
+	LN_rle_compression,
+	NULL,
+	NULL,
+	rle_compress_block,
+	rle_expand_block,
+	NULL,
+	NULL,
+	};
+#else
+  GET_STATIC_VAR_FROM_TLS(rle_method,c_rle,COMP_METHOD)
+  #define rle_method (*GET_WSD_VAR_NAME(rle_method,c_rle,s)())
+  const COMP_METHOD temp_s_rle_method={
+	NID_rle_compression,
+	LN_rle_compression,
+	NULL,
+	NULL,
+	rle_compress_block,
+	rle_expand_block,
+	NULL,
+	NULL,
+	};
+#endif
+
+EXPORT_C COMP_METHOD *COMP_rle(void)
+	{
+	return(&rle_method);
+	}
+
+static int rle_compress_block(COMP_CTX *ctx, unsigned char *out,
+	     unsigned int olen, unsigned char *in, unsigned int ilen)
+	{
+	/* int i; */
+
+	if (olen < (ilen+1))
+		{
+		/* ZZZZZZZZZZZZZZZZZZZZZZ */
+		return(-1);
+		}
+
+	*(out++)=0;
+	memcpy(out,in,ilen);
+	return(ilen+1);
+	}
+
+static int rle_expand_block(COMP_CTX *ctx, unsigned char *out,
+	     unsigned int olen, unsigned char *in, unsigned int ilen)
+	{
+	int i;
+
+	if (olen < (ilen-1))
+		{
+		/* ZZZZZZZZZZZZZZZZZZZZZZ */
+		return(-1);
+		}
+
+	i= *(in++);
+	if (i == 0)
+		{
+		memcpy(out,in,ilen-1);
+		}
+	return(ilen-1);
+	}
+