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#include "streamvbyte.h"
#include "streamvbyte_zigzag.h"
#include "streamvbytedelta.h"
#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
static bool isLittleEndian() {
int x = 1;
char *c = (char *)&x;
return (*c == 1);
}
// return -1 in case of failure
int zigzagtests() {
size_t N = 4096;
int32_t *datain = malloc(N * sizeof(int32_t));
for(size_t i = 0; i < N; i++)
datain[i] = rand() - rand();
uint32_t *dataout = malloc(N * sizeof(uint32_t));
int32_t *databack = malloc(N * sizeof(int32_t));
uint32_t *deltadataout = malloc(N * sizeof(uint32_t));
int32_t *deltadataback = malloc(N * sizeof(int32_t));
zigzag_encode(datain, dataout, N);
zigzag_decode(dataout, databack, N);
zigzag_delta_encode(datain, deltadataout, N, 0);
zigzag_delta_decode(deltadataout, deltadataback, N, 0);
int isok = 1;
for(size_t i = 0; i < N; i++) {
if(datain[i] != databack[i]) {
printf("bug\n");
isok = -1;
}
if(datain[i] != deltadataback[i]) {
printf("bug\n");
isok = -1;
}
}
free(databack);
free(dataout);
free(datain);
return isok;
}
// return -1 in case of failure
int basictests() {
int N = 4096;
uint32_t *datain = malloc(N * sizeof(uint32_t));
// on purpose we mess with the alignment of compressedbufferorig
uint8_t *compressedbufferorig =
malloc(streamvbyte_max_compressedbytes(N) + sizeof(uint32_t));
uint8_t *compressedbuffer = compressedbufferorig + (sizeof(uint32_t) - 1);
uint32_t *recovdata = malloc(N * sizeof(uint32_t));
for (int length = 0; length <= N;) {
for (uint32_t gap = 1; gap <= 387420489; gap *= 3) {
for (int k = 0; k < length; ++k)
datain[k] = gap - 1 + (rand() % 8); // sometimes start with zero
// Default encoding: 1,2,3,4 bytes per value
size_t compsize = streamvbyte_encode(datain, length, compressedbuffer);
size_t usedbytes = streamvbyte_decode(compressedbuffer, recovdata, length);
if (compsize != usedbytes) {
printf("[streamvbyte_decode] code is buggy length=%d gap=%d: compsize=%d != "
"usedbytes=%d \n",
(int)length, (int)gap, (int)compsize, (int)usedbytes);
return -1;
}
for (int k = 0; k < length; ++k) {
if (recovdata[k] != datain[k]) {
printf("[streamvbyte_decode] code is buggy gap=%d\n", (int)gap);
return -1;
}
}
// Alternative encoding: 0,1,2,4 bytes per value
compsize = streamvbyte_encode_0124(datain, length, compressedbuffer);
usedbytes = streamvbyte_decode_0124(compressedbuffer, recovdata, length);
if (compsize != usedbytes) {
printf("[streamvbyte_decode_0124] code is buggy length=%d gap=%d: compsize=%d != "
"usedbytes=%d \n",
(int)length, (int)gap, (int)compsize, (int)usedbytes);
return -1;
}
for (int k = 0; k < length; ++k) {
if (recovdata[k] != datain[k]) {
printf("[streamvbyte_decode_0124] code is buggy gap=%d\n", (int)gap);
return -1;
}
}
}
// Delta-encoded functions
for (size_t gap = 1; gap <= 531441; gap *= 3) {
for (int k = 0; k < length; ++k)
datain[k] = gap * k;
size_t compsize =
streamvbyte_delta_encode(datain, length, compressedbuffer, 0);
size_t usedbytes =
streamvbyte_delta_decode(compressedbuffer, recovdata, length, 0);
if (compsize != usedbytes) {
printf("[streamvbyte_delta_decode] code is buggy gap=%d, size "
"mismatch %d %d \n",
(int)gap, (int)compsize, (int)usedbytes);
return -1;
}
for (int k = 0; k < length; ++k) {
if (recovdata[k] != datain[k]) {
printf("[streamvbyte_delta_decode] code is buggy gap=%d\n",
(int)gap);
return -1;
}
}
}
if (length < 128)
++length;
else {
length *= 2;
}
}
free(datain);
free(compressedbufferorig);
free(recovdata);
return 0;
}
// return -1 in case of failure
int aqrittests() {
uint8_t in[16];
uint8_t compressedbuffer[32];
uint8_t recovdata[16];
memset(compressedbuffer, 0, 32);
memset(recovdata, 0, 16);
for (int i = 0; i < 0x10000; i++) {
in[0] = (uint8_t)((i >> 0) & 1);
in[1] = (uint8_t)((i >> 1) & 1);
in[2] = (uint8_t)((i >> 2) & 1);
in[3] = (uint8_t)((i >> 3) & 1);
in[4] = (uint8_t)((i >> 4) & 1);
in[5] = (uint8_t)((i >> 5) & 1);
in[6] = (uint8_t)((i >> 6) & 1);
in[7] = (uint8_t)((i >> 7) & 1);
in[8] = (uint8_t)((i >> 8) & 1);
in[9] = (uint8_t)((i >> 9) & 1);
in[10] = (uint8_t)((i >> 10) & 1);
in[11] = (uint8_t)((i >> 11) & 1);
in[12] = (uint8_t)((i >> 12) & 1);
in[13] = (uint8_t)((i >> 13) & 1);
in[14] = (uint8_t)((i >> 14) & 1);
in[15] = (uint8_t)((i >> 15) & 1);
const int length = 4;
size_t compsize = streamvbyte_encode((uint32_t *)in, length, compressedbuffer);
size_t usedbytes = streamvbyte_decode(compressedbuffer, (uint32_t *)recovdata, length);
if (compsize != usedbytes) {
printf("[streamvbyte_decode] code is buggy");
return -1;
}
for (size_t k = 0; k < length * sizeof(uint32_t); ++k) {
if (recovdata[k] != in[k]) {
printf("[streamvbyte_decode] code is buggy");
return -1;
}
}
compsize = streamvbyte_encode_0124((uint32_t *)in, length, compressedbuffer);
usedbytes = streamvbyte_decode_0124(compressedbuffer, (uint32_t *)recovdata, length);
if (compsize != usedbytes) {
printf("[streamvbyte_decode_0124] code is buggy");
return -1;
}
for (size_t k = 0; k < length * sizeof(uint32_t); ++k) {
if (recovdata[k] != in[k]) {
printf("[streamvbyte_decode_0124] code is buggy");
return -1;
}
}
}
return 0;
}
int main() {
if(zigzagtests() == -1)
return -1;
if (basictests() == -1)
return -1;
if (aqrittests() == -1)
return -1;
printf("Code looks good.\n");
if (isLittleEndian()) {
printf("And you have a little endian architecture.\n");
} else {
printf("And you have a big endian architecture.\n");
printf("Warning: produced compressed bytes may not be interoperable with "
"little endian systems.\n");
}
#ifdef __AVX__
printf("Code was vectorized (x64).\n");
#elif defined(__ARM_NEON__)
printf("Code was vectorized (ARM NEON).\n");
#else
printf("Warning: you tested non-vectorized code.\n");
#endif
return 0;
}
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