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#include <assert.h>
#include <stdio.h>
#include <stdlib.h>
#include "streamvbyte.h"
int main() {
int N = 5000;
uint32_t *datain = malloc(N * sizeof(uint32_t));
uint8_t *compressedbuffer = malloc(N * sizeof(uint32_t));
uint32_t *recovdata = malloc(N * sizeof(uint32_t));
for (int k = 0; k < N; ++k)
datain[k] = k * 100;
size_t compsize = streamvbyte_encode(datain, N, compressedbuffer); // encoding
const char *filename = "data.bin";
printf("I will write the data to %s \n", filename);
FILE *f = fopen(filename, "w");
size_t bw = fwrite(compressedbuffer, 1, compsize, f);
fclose(f);
if (bw != compsize) {
printf("Tried to write %zu bytes, wrote %zu \n", compsize, bw);
}
f = fopen(filename, "r");
for (size_t k = 0; k < N * sizeof(uint32_t); ++k)
compressedbuffer[k] = 0;
size_t br = fread(compressedbuffer, 1, compsize, f);
if (br != compsize) {
printf("Tried to read %zu bytes, wrote %zu \n", compsize, br);
}
// here the result is stored in compressedbuffer using compsize bytes
size_t compsize2 = streamvbyte_decode(compressedbuffer, recovdata,
N); // decoding (fast)
assert(compsize == compsize2);
free(datain);
free(compressedbuffer);
free(recovdata);
printf("Compressed %d integers down to %d bytes.\n", N, (int)compsize);
return 0;
}
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