| /* |
| * Copyright (c) Martin Liska, SUSE, 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). |
| * You may select, at your option, one of the above-listed licenses. |
| */ |
| |
| |
| #include <stdio.h> // printf |
| #include <stdlib.h> // free |
| #include <string.h> // memset, strcat, strlen |
| #include <zstd.h> // presumes zstd library is installed |
| #include "common.h" // Helper functions, CHECK(), and CHECK_ZSTD() |
| #include <pthread.h> |
| |
| typedef struct compress_args |
| { |
| const char *fname; |
| char *outName; |
| int cLevel; |
| #if defined(ZSTD_STATIC_LINKING_ONLY) |
| ZSTD_threadPool *pool; |
| #endif |
| } compress_args_t; |
| |
| static void *compressFile_orDie(void *data) |
| { |
| const int nbThreads = 16; |
| |
| compress_args_t *args = (compress_args_t *)data; |
| fprintf (stderr, "Starting compression of %s with level %d, using %d threads\n", args->fname, args->cLevel, nbThreads); |
| /* Open the input and output files. */ |
| FILE* const fin = fopen_orDie(args->fname, "rb"); |
| FILE* const fout = fopen_orDie(args->outName, "wb"); |
| /* Create the input and output buffers. |
| * They may be any size, but we recommend using these functions to size them. |
| * Performance will only suffer significantly for very tiny buffers. |
| */ |
| size_t const buffInSize = ZSTD_CStreamInSize(); |
| void* const buffIn = malloc_orDie(buffInSize); |
| size_t const buffOutSize = ZSTD_CStreamOutSize(); |
| void* const buffOut = malloc_orDie(buffOutSize); |
| |
| /* Create the context. */ |
| ZSTD_CCtx* const cctx = ZSTD_createCCtx(); |
| CHECK(cctx != NULL, "ZSTD_createCCtx() failed!"); |
| |
| #if defined(ZSTD_STATIC_LINKING_ONLY) |
| size_t r = ZSTD_CCtx_refThreadPool(cctx, args->pool); |
| CHECK(r == 0, "ZSTD_CCtx_refThreadPool failed!"); |
| #endif |
| |
| /* Set any parameters you want. |
| * Here we set the compression level, and enable the checksum. |
| */ |
| CHECK_ZSTD( ZSTD_CCtx_setParameter(cctx, ZSTD_c_compressionLevel, args->cLevel) ); |
| CHECK_ZSTD( ZSTD_CCtx_setParameter(cctx, ZSTD_c_checksumFlag, 1) ); |
| ZSTD_CCtx_setParameter(cctx, ZSTD_c_nbWorkers, nbThreads); |
| |
| /* This loop read from the input file, compresses that entire chunk, |
| * and writes all output produced to the output file. |
| */ |
| size_t const toRead = buffInSize; |
| for (;;) { |
| size_t read = fread_orDie(buffIn, toRead, fin); |
| /* Select the flush mode. |
| * If the read may not be finished (read == toRead) we use |
| * ZSTD_e_continue. If this is the last chunk, we use ZSTD_e_end. |
| * Zstd optimizes the case where the first flush mode is ZSTD_e_end, |
| * since it knows it is compressing the entire source in one pass. |
| */ |
| int const lastChunk = (read < toRead); |
| ZSTD_EndDirective const mode = lastChunk ? ZSTD_e_end : ZSTD_e_continue; |
| /* Set the input buffer to what we just read. |
| * We compress until the input buffer is empty, each time flushing the |
| * output. |
| */ |
| ZSTD_inBuffer input = { buffIn, read, 0 }; |
| int finished; |
| do { |
| /* Compress into the output buffer and write all of the output to |
| * the file so we can reuse the buffer next iteration. |
| */ |
| ZSTD_outBuffer output = { buffOut, buffOutSize, 0 }; |
| size_t const remaining = ZSTD_compressStream2(cctx, &output , &input, mode); |
| CHECK_ZSTD(remaining); |
| fwrite_orDie(buffOut, output.pos, fout); |
| /* If we're on the last chunk we're finished when zstd returns 0, |
| * which means its consumed all the input AND finished the frame. |
| * Otherwise, we're finished when we've consumed all the input. |
| */ |
| finished = lastChunk ? (remaining == 0) : (input.pos == input.size); |
| } while (!finished); |
| CHECK(input.pos == input.size, |
| "Impossible: zstd only returns 0 when the input is completely consumed!"); |
| |
| if (lastChunk) { |
| break; |
| } |
| } |
| |
| fprintf (stderr, "Finishing compression of %s\n", args->outName); |
| |
| ZSTD_freeCCtx(cctx); |
| fclose_orDie(fout); |
| fclose_orDie(fin); |
| free(buffIn); |
| free(buffOut); |
| free(args->outName); |
| |
| return NULL; |
| } |
| |
| |
| static char* createOutFilename_orDie(const char* filename) |
| { |
| size_t const inL = strlen(filename); |
| size_t const outL = inL + 5; |
| void* const outSpace = malloc_orDie(outL); |
| memset(outSpace, 0, outL); |
| strcat(outSpace, filename); |
| strcat(outSpace, ".zst"); |
| return (char*)outSpace; |
| } |
| |
| int main(int argc, const char** argv) |
| { |
| const char* const exeName = argv[0]; |
| |
| if (argc<=3) { |
| printf("wrong arguments\n"); |
| printf("usage:\n"); |
| printf("%s POOL_SIZE LEVEL FILES\n", exeName); |
| return 1; |
| } |
| |
| int pool_size = atoi (argv[1]); |
| CHECK(pool_size != 0, "can't parse POOL_SIZE!"); |
| |
| int level = atoi (argv[2]); |
| CHECK(level != 0, "can't parse LEVEL!"); |
| |
| argc -= 3; |
| argv += 3; |
| |
| #if defined(ZSTD_STATIC_LINKING_ONLY) |
| ZSTD_threadPool *pool = ZSTD_createThreadPool (pool_size); |
| CHECK(pool != NULL, "ZSTD_createThreadPool() failed!"); |
| fprintf (stderr, "Using shared thread pool of size %d\n", pool_size); |
| #else |
| fprintf (stderr, "All threads use its own thread pool\n"); |
| #endif |
| |
| pthread_t *threads = malloc_orDie(argc * sizeof(pthread_t)); |
| compress_args_t *args = malloc_orDie(argc * sizeof(compress_args_t)); |
| |
| for (unsigned i = 0; i < argc; i++) |
| { |
| args[i].fname = argv[i]; |
| args[i].outName = createOutFilename_orDie(args[i].fname); |
| args[i].cLevel = level; |
| #if defined(ZSTD_STATIC_LINKING_ONLY) |
| args[i].pool = pool; |
| #endif |
| |
| pthread_create (&threads[i], NULL, compressFile_orDie, &args[i]); |
| } |
| |
| for (unsigned i = 0; i < argc; i++) |
| pthread_join (threads[i], NULL); |
| |
| #if defined(ZSTD_STATIC_LINKING_ONLY) |
| ZSTD_freeThreadPool (pool); |
| #endif |
| |
| return 0; |
| } |