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/*
Copyright (c) 2021 Blosc Development Team <blosc@blosc.org>
https://blosc.org
License: BSD 3-Clause (see LICENSE.txt)
Example program demonstrating that from 1.9.0 on, Blosc does not
need to be initialized (although it is recommended).
To compile this program:
$ gcc noinit.c -o noinit -lblosc
or, if you don't have the blosc library installed yet:
$ gcc -O3 -msse2 noinit.c -I../blosc -o noinit -L../build/blosc -lblosc2
$ export LD_LIBRARY_PATH=../build/blosc
Using MSVC on Windows:
$ cl /arch:SSE2 /Ox /Fenoinit.exe /Iblosc examples\noinit.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
To run:
$ ./noinit
Blosc version info: 1.8.2.dev ($Date:: 2016-04-08 #$)
Compression: 4000000 -> 158788 (25.2x)
Decompression successful!
Successful roundtrip!
*/
#include <stdio.h>
#include <blosc2.h>
#define SIZE (100*100*100)
int main(void){
static float data[SIZE];
static float data_out[SIZE];
static float data_dest[SIZE];
int isize = SIZE*sizeof(float), osize = SIZE*sizeof(float);
int dsize = SIZE*sizeof(float), csize;
int i;
for(i=0; i<SIZE; i++){
data[i] = (float)i;
}
/* Register the filter with the library */
printf("Blosc version info: %s (%s)\n",
BLOSC2_VERSION_STRING, BLOSC2_VERSION_DATE);
/* From 1.9 on, we don't need to initialize the Blosc compressor anymore */
/* blosc2_init(); */
/* Compress with clevel=5 and shuffle active */
csize = blosc1_compress(5, 1, sizeof(float), isize, data, data_out, osize);
if (csize == 0) {
printf("Buffer is incompressible. Giving up.\n");
return 1;
}
else if (csize < 0) {
printf("Compression error. Error code: %d\n", csize);
return csize;
}
printf("Compression: %d -> %d (%.1fx)\n", isize, csize, (1.*isize) / csize);
/* Decompress */
dsize = blosc1_decompress(data_out, data_dest, dsize);
if (dsize < 0) {
printf("Decompression error. Error code: %d\n", dsize);
return dsize;
}
printf("Decompression successful!\n");
for(i=0;i<SIZE;i++){
if(data[i] != data_dest[i]) {
printf("Decompressed data differs from original!\n");
return -1;
}
}
printf("Successful roundtrip!\n");
return 0;
}
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