89 lines
2.1 KiB
C
89 lines
2.1 KiB
C
/*
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Copyright (C) 2014 Francesc Alted
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http://blosc.org
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License: MIT (see LICENSE.txt)
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Example program demonstrating use of the Blosc filter from C code.
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To compile this program:
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$ gcc simple.c -o simple -lblosc
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or, if you don't have the blosc library installed:
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$ gcc -O3 -msse2 simple.c -I../blosc -o simple -L../build/blosc
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Using MSVC on Windows:
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$ cl /arch:SSE2 /Ox /Fesimple.exe /Iblosc examples\simple.c blosc\blosc.c blosc\blosclz.c blosc\shuffle.c blosc\shuffle-sse2.c blosc\shuffle-generic.c blosc\bitshuffle-generic.c blosc\bitshuffle-sse2.c
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To run:
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$ ./simple
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Blosc version info: 1.4.2.dev ($Date:: 2014-07-08 #$)
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Compression: 4000000 -> 158494 (25.2x)
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Decompression succesful!
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Succesful roundtrip!
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*/
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#include <stdio.h>
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#include <blosc.h>
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#define SIZE 100*100*100
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int main(){
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static float data[SIZE];
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static float data_out[SIZE];
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static float data_dest[SIZE];
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int isize = SIZE*sizeof(float), osize = SIZE*sizeof(float);
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int dsize = SIZE*sizeof(float), csize;
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int i;
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for(i=0; i<SIZE; i++){
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data[i] = i;
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}
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/* Register the filter with the library */
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printf("Blosc version info: %s (%s)\n",
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BLOSC_VERSION_STRING, BLOSC_VERSION_DATE);
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/* Initialize the Blosc compressor */
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blosc_init();
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/* Compress with clevel=5 and shuffle active */
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csize = blosc_compress(5, 1, sizeof(float), isize, data, data_out, osize);
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if (csize == 0) {
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printf("Buffer is uncompressible. Giving up.\n");
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return 1;
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}
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else if (csize < 0) {
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printf("Compression error. Error code: %d\n", csize);
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return csize;
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}
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printf("Compression: %d -> %d (%.1fx)\n", isize, csize, (1.*isize) / csize);
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/* Decompress */
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dsize = blosc_decompress(data_out, data_dest, dsize);
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if (dsize < 0) {
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printf("Decompression error. Error code: %d\n", dsize);
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return dsize;
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}
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printf("Decompression succesful!\n");
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/* After using it, destroy the Blosc environment */
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blosc_destroy();
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for(i=0;i<SIZE;i++){
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if(data[i] != data_dest[i]) {
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printf("Decompressed data differs from original!\n");
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return -1;
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}
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}
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printf("Succesful roundtrip!\n");
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return 0;
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}
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