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/*
* Copyright (c) 2017-present, Facebook, Inc.
* All rights reserved.
*
* This source code is licensed under both the BSD-style license (found in the
* LICENSE file in the root directory of this source tree) and the GPLv2 (found
* in the COPYING file in the root directory of this source tree).
*/
#include <stdlib.h> // malloc, free, exit, atoi
#include <stdio.h> // fprintf, perror, feof, fopen, etc.
#include <string.h> // strlen, memset, strcat
#define ZSTD_STATIC_LINKING_ONLY
#include <zstd.h> // presumes zstd library is installed
#include <zstd_errors.h>
#if defined(WIN32) || defined(_WIN32)
# include <windows.h>
# define SLEEP(x) Sleep(x)
#else
# include <unistd.h>
# define SLEEP(x) usleep(x * 1000)
#endif
#define XXH_NAMESPACE ZSTD_
#include "xxhash.h"
#include "pool.h" // use zstd thread pool for demo
#include "zstd_seekable.h"
static void* malloc_orDie(size_t size)
{
void* const buff = malloc(size);
if (buff) return buff;
/* error */
perror("malloc:");
exit(1);
}
static FILE* fopen_orDie(const char *filename, const char *instruction)
{
FILE* const inFile = fopen(filename, instruction);
if (inFile) return inFile;
/* error */
perror(filename);
exit(3);
}
static size_t fread_orDie(void* buffer, size_t sizeToRead, FILE* file)
{
size_t const readSize = fread(buffer, 1, sizeToRead, file);
if (readSize == sizeToRead) return readSize; /* good */
if (feof(file)) return readSize; /* good, reached end of file */
/* error */
perror("fread");
exit(4);
}
static size_t fwrite_orDie(const void* buffer, size_t sizeToWrite, FILE* file)
{
size_t const writtenSize = fwrite(buffer, 1, sizeToWrite, file);
if (writtenSize == sizeToWrite) return sizeToWrite; /* good */
/* error */
perror("fwrite");
exit(5);
}
static size_t fclose_orDie(FILE* file)
{
if (!fclose(file)) return 0;
/* error */
perror("fclose");
exit(6);
}
static void fseek_orDie(FILE* file, long int offset, int origin)
{
if (!fseek(file, offset, origin)) {
if (!fflush(file)) return;
}
/* error */
perror("fseek");
exit(7);
}
static long int ftell_orDie(FILE* file)
{
long int off = ftell(file);
if (off != -1) return off;
/* error */
perror("ftell");
exit(8);
}
struct job {
const void* src;
size_t srcSize;
void* dst;
size_t dstSize;
unsigned checksum;
int compressionLevel;
int done;
};
static void compressFrame(void* opaque)
{
struct job* job = opaque;
job->checksum = XXH64(job->src, job->srcSize, 0);
size_t ret = ZSTD_compress(job->dst, job->dstSize, job->src, job->srcSize, job->compressionLevel);
if (ZSTD_isError(ret)) {
fprintf(stderr, "ZSTD_compress() error : %s \n", ZSTD_getErrorName(ret));
exit(20);
}
job->dstSize = ret;
job->done = 1;
}
static void compressFile_orDie(const char* fname, const char* outName, int cLevel, unsigned frameSize, int nbThreads)
{
POOL_ctx* pool = POOL_create(nbThreads, nbThreads);
if (pool == NULL) { fprintf(stderr, "POOL_create() error \n"); exit(9); }
FILE* const fin = fopen_orDie(fname, "rb");
FILE* const fout = fopen_orDie(outName, "wb");
if (ZSTD_compressBound(frameSize) > 0xFFFFFFFFU) { fprintf(stderr, "Frame size too large \n"); exit(10); }
unsigned dstSize = ZSTD_compressBound(frameSize);
fseek_orDie(fin, 0, SEEK_END);
long int length = ftell_orDie(fin);
fseek_orDie(fin, 0, SEEK_SET);
size_t numFrames = (length + frameSize - 1) / frameSize;
struct job* jobs = malloc_orDie(sizeof(struct job) * numFrames);
size_t i;
for(i = 0; i < numFrames; i++) {
void* in = malloc_orDie(frameSize);
void* out = malloc_orDie(dstSize);
size_t inSize = fread_orDie(in, frameSize, fin);
jobs[i].src = in;
jobs[i].srcSize = inSize;
jobs[i].dst = out;
jobs[i].dstSize = dstSize;
jobs[i].compressionLevel = cLevel;
jobs[i].done = 0;
POOL_add(pool, compressFrame, &jobs[i]);
}
ZSTD_frameLog* fl = ZSTD_seekable_createFrameLog(1);
if (fl == NULL) { fprintf(stderr, "ZSTD_seekable_createFrameLog() failed \n"); exit(11); }
for (i = 0; i < numFrames; i++) {
while (!jobs[i].done) SLEEP(5); /* wake up every 5 milliseconds to check */
fwrite_orDie(jobs[i].dst, jobs[i].dstSize, fout);
free((void*)jobs[i].src);
free(jobs[i].dst);
size_t ret = ZSTD_seekable_logFrame(fl, jobs[i].dstSize, jobs[i].srcSize, jobs[i].checksum);
if (ZSTD_isError(ret)) { fprintf(stderr, "ZSTD_seekable_logFrame() error : %s \n", ZSTD_getErrorName(ret)); }
}
{ unsigned char seekTableBuff[1024];
ZSTD_outBuffer out = {seekTableBuff, 1024, 0};
while (ZSTD_seekable_writeSeekTable(fl, &out) != 0) {
fwrite_orDie(seekTableBuff, out.pos, fout);
out.pos = 0;
}
fwrite_orDie(seekTableBuff, out.pos, fout);
}
ZSTD_seekable_freeFrameLog(fl);
free(jobs);
fclose_orDie(fout);
fclose_orDie(fin);
}
static const char* createOutFilename_orDie(const char* filename)
{
size_t const inL = strlen(filename);
size_t const outL = inL + 5;
void* outSpace = malloc_orDie(outL);
memset(outSpace, 0, outL);
strcat(outSpace, filename);
strcat(outSpace, ".zst");
return (const char*)outSpace;
}
int main(int argc, const char** argv) {
const char* const exeName = argv[0];
if (argc!=4) {
printf("wrong arguments\n");
printf("usage:\n");
printf("%s FILE FRAME_SIZE NB_THREADS\n", exeName);
return 1;
}
{ const char* const inFileName = argv[1];
unsigned const frameSize = (unsigned)atoi(argv[2]);
int const nbThreads = atoi(argv[3]);
const char* const outFileName = createOutFilename_orDie(inFileName);
compressFile_orDie(inFileName, outFileName, 5, frameSize, nbThreads);
}
return 0;
}
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