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