/*//////////////////////////////// "lzssscheme.c" /////////////////////////////////                  INTEL CORPORATION PROPRIETARY INFORMATION//     This software is supplied under the terms of a license agreement or//     nondisclosure agreement with Intel Corporation and may not be copied//     or disclosed except in accordance with the terms of that agreement.//          Copyright(c) 2005 Intel Corporation. All Rights Reserved.////     higher level functions of IPP DC ( data compression ) domain for//     LZSS encoding/decoding usage*/#include "lzssscheme.h"int CompressLZSS( Ipp8u *pSrc, int SrcLen, Ipp8u *pDst, int *pDstLen ) {    IppStatus         st;    IppLZSSState_8u * pLZSSState = NULL;    Ipp8u           * pTSrc      = pSrc,                    * pTDst      = pDst;    int               srcLen     = SrcLen,                      tDstLen    = 0,                      dstLen     = *pDstLen;    /* inits the lzss state structure for decoding */    if( ippStsNoErr != ( st = ippsEncodeLZSSInitAlloc_8u( &pLZSSState ) ) ) {        fprintf( stderr, "Error while encode lz77.exiting...\n");        return st;    }    do {        dstLen = GZIPBLOCKSIZE; /* encode using a small blocks of GZIPBLOCKSIZE length */        tDstLen += dstLen;        /* encode source vector pSrc to destination pDst and returns len of encoded vector to dstLen*/        st = ippsEncodeLZSS_8u( &pTSrc, &srcLen, &pTDst, &dstLen, pLZSSState );        /* if error is not due to the insufficies output buffer */        if( st != ippStsNoErr && st != ippStsDstSizeLessExpected ) {            fprintf( stderr, "Error while encode lz77.exiting...\n");            return st;        }        tDstLen -= dstLen;    } while( st != ippStsNoErr );    *pDstLen = tDstLen;    tDstLen = dstLen;    if( ippStsNoErr != ( st = ippsEncodeLZSSFlush_8u(&pTDst, &dstLen, pLZSSState) ) ) {        fprintf( stderr, "Error <%d> while flushing LZSS endings. Exiting.\n", st );    }    tDstLen -= dstLen;    *pDstLen += tDstLen;    /* frees the space, allocated for pLZSSState state structure */    ippsLZSSFree_8u( pLZSSState );    return 0;}int DecompressLZSS( Ipp8u *pSrc, int SrcLen, Ipp8u *pDst, int *pDstLen ) {    IppStatus         st;    IppLZSSState_8u * pLZSSState = NULL;    Ipp8u           * pTSrc      = pSrc,                    * pTDst      = pDst;    int               srcLen     = SrcLen,                      dstLen     = *pDstLen,                      tDstLen    = 0;    /* inits the lzss state structure for decoding */    if( ippStsNoErr != ( st = ippsDecodeLZSSInitAlloc_8u( &pLZSSState ) ) ) {        fprintf( stderr, "Error while initalloc 4 decode lz77.exiting...\n");        return st;    }    do {        dstLen = GZIPBLOCKSIZE; /* decode using a small blocks of GZIPBLOCKSIZE length */        tDstLen += dstLen;        /* decode source vector pSrc to destination pDst and returns len of decoded vector to dstLen*/        st = ippsDecodeLZSS_8u( &pTSrc, &srcLen, &pTDst, &dstLen, pLZSSState );        /* if error is not due to the insufficies output buffer */        if( st != ippStsNoErr && st != ippStsDstSizeLessExpected ) {            fprintf( stderr, "Error %d while decode lz77.exiting...\n", st);            return st;        }        tDstLen -= dstLen;    } while( st != ippStsNoErr );    *pDstLen = tDstLen;    dstLen =  tDstLen;    /* frees the space, allocated for pLZSSState state structure */    ippsLZSSFree_8u( pLZSSState );    return 0;}