/*
// Copyright 2017 Intel Corporation All Rights Reserved.
//
// The source code, information and material ("Material") contained herein is
// owned by Intel Corporation or its suppliers or licensors, and title
// to such Material remains with Intel Corporation or its suppliers or
// licensors. The Material contains proprietary information of Intel
// or its suppliers and licensors. The Material is protected by worldwide
// copyright laws and treaty provisions. No part of the Material may be used,
// copied, reproduced, modified, published, uploaded, posted, transmitted,
// distributed or disclosed in any way without Intel's prior express written
// permission. No license under any patent, copyright or other intellectual
// property rights in the Material is granted to or conferred upon you,
// either expressly, by implication, inducement, estoppel or otherwise.
// Any license under such intellectual property rights must be express and
// approved by Intel in writing.
//
// Unless otherwise agreed by Intel in writing,
// you may not remove or alter this notice or any other notice embedded in
// Materials by Intel or Intel's suppliers or licensors in any way.
//
*/

/*
 The example below shows how to use the functions:
     ippsEncodeLZ4HashTableGetSize_8u
     ippsEncodeLZ4HashTableInit_8u
     ippsEncodeLZ4Safe_8u
*/

#include <stdio.h>
#include <string.h>

#include <ippdc.h>
#include <ipps.h>

/* Next two defines are created to simplify code reading and understanding */
#define EXIT_MAIN       exitLine:                              /* Label for Exit */
#define check_sts(st)   if((st) != ippStsNoErr) goto exitLine; /* Go to Exit if
                Intel(R) IPP function returned status different from ippStsNoErr */

#define TEST_SIZE (1024)
#define COMPR_LEN (TEST_SIZE / 20)

int main(void)
{
    Ipp8u       *srcBuf = NULL, *comprBuf = NULL, *hashTable = NULL;
    IppStatus   st = ippStsNoErr;
    int         i, hashSize, remBytes, srcLen, dstLen;

    srcBuf      = ippsMalloc_8u(TEST_SIZE);
    comprBuf    = ippsMalloc_8u(COMPR_LEN);
    /* Initialize source buffer */
    check_sts(      st = ippsVectorJaehne_8u(srcBuf, TEST_SIZE, IPP_MAX_8U)         )
    for(i = 0; i < TEST_SIZE; i++)
        srcBuf[i] >>= 6;                    /* Decrease source data entropy */
    /* Init and allocate hash table */
    check_sts(  st = ippsEncodeLZ4HashTableGetSize_8u(&hashSize)    )
    hashTable   = ippsMalloc_8u(hashSize);
    check_sts(  st = ippsEncodeLZ4HashTableInit_8u(hashTable, TEST_SIZE)    )
    /* Compress source data */
    remBytes = TEST_SIZE;
    while(remBytes > 0)
    {
        srcLen = remBytes;
        dstLen = COMPR_LEN;
        /* Compressing into knowingly small buffer */
        st = ippsEncodeLZ4Safe_8u((const Ipp8u*)srcBuf + TEST_SIZE - remBytes, &srcLen,
                                  comprBuf, &dstLen, hashTable);
        if(st == ippStsDstSizeLessExpected)
        {
            /* Print compression result */
            printf("Compression: %d bytes compressed into %d bytes\n", srcLen, dstLen);
        }
        else if(st < ippStsNoErr)
        {
            printf("Error in compression function\n");
            break;
        }
        remBytes -= srcLen;
    }
EXIT_MAIN
    ippsFree(srcBuf);
    ippsFree(comprBuf);
    ippsFree(hashTable);
    return (int)st;
}