Search  

---

C:/temp/src/j2k/Test/LZH_Test.cpp

Go to the documentation of this file.

#include <j2k/Fred/Basic.hpp>
#include <time.h>
#include <memory.h>

#include <j2k/Fred/LZH/lzhl.h>

#define BLOCKSIZE 4000000

void usage() {
  printf( "Usage: LZHL {+|-} <input_file> <output_file>\n" );
}

int main( int argc, char** argv ) {
  if ( argc < 4 ) {
    usage();
    return 1;
  }

  if ( *argv[ 1 ] == '+' ) {
    FILE* f;
    int i, rawLen, compLen;
    unsigned char* rawBlock;
    unsigned char* compBlock;
    clock_t start, finish;
    LZHL_CHANDLE comp;
       
    f = fopen( argv[ 2 ], "rb" );
    if ( !f )
      abort();

    fseek( f, 0, SEEK_END );
    rawLen = ftell( f );
    fseek( f, 0, SEEK_SET );
    rawBlock = (unsigned char*)malloc( rawLen );
    compBlock = (unsigned char*)malloc( LZHLCompressorCalcMaxBuf( rawLen ) );
    fread( rawBlock, 1, rawLen, f );
    fclose( f );

    start = clock();
    comp = LZHLCreateCompressor();
    compLen = 0;

    for( i=0; i < rawLen ; i += BLOCKSIZE ) {
      int l = min( BLOCKSIZE, rawLen - i );
      int lComp = LZHLCompress( comp, compBlock + compLen, rawBlock + i, l );
      compLen += lComp;
    }

    LZHLDestroyCompressor( comp );
    finish = clock();
    printf( "%d ticks\n", finish - start );

    f = fopen( argv[ 3 ], "wb" );
    if ( !f )
      abort();

     // rawLen is stored as a byte sequence to avoid problems
     // with little_endian/big_endian

     for ( i=0; i < 4 ; ++i )
       fputc( (unsigned char)(rawLen >> i*8), f );

       fwrite( compBlock, 1, compLen, f );
       fclose( f );


  } else if( *argv[ 1 ] == '-' ) {

    FILE* f;
    int i, fileLen, rawLen, compLen;
    size_t srcSz, dstSz;
    unsigned char* rawBlock;
    unsigned char* compBlock;
    clock_t start, finish;
    LZHL_DHANDLE decomp;
        
    f = fopen( argv[ 2 ], "rb" );
    if ( !f )
      abort();

    fseek( f, 0, SEEK_END );
    fileLen = ftell( f );
    fseek( f, 0, SEEK_SET );

    if ( fileLen < 4 )
      abort();

    rawLen = 0;
    for ( i=0; i < 4 ; ++i )
      rawLen |= (fgetc( f ) << i*8);

    compLen = fileLen - 4;
    rawBlock = (unsigned char*)malloc( rawLen );
    compBlock = (unsigned char*)malloc( fileLen );

    if ( !rawBlock || !compBlock )
      abort();

    fread( compBlock, 1, fileLen, f );
    fclose( f );

    start = clock();
    srcSz = compLen;
    dstSz = rawLen;
    decomp = LZHLCreateDecompressor();

    for(;;) {
      int Ok = LZHLDecompress( decomp, rawBlock + rawLen - dstSz, &dstSz, compBlock + compLen - srcSz, &srcSz );
      if ( !Ok )
        abort();

      if ( srcSz == 0 )
        break;

    }

    LZHLDestroyDecompressor( decomp );
    finish = clock();
    printf( "%d ticks\n", finish - start );

    f = fopen( argv[ 3 ], "wb" );
    if ( !f )
      abort();

    fwrite( rawBlock, 1, rawLen, f );
    fclose( f );

  } else {
    usage();
    return 1;
  }

  return 0;
}

---