diff options
author | Baptiste Daroussin <bapt@FreeBSD.org> | 2017-08-18 11:27:10 +0000 |
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committer | Baptiste Daroussin <bapt@FreeBSD.org> | 2017-08-18 11:27:10 +0000 |
commit | 4ab113e3d97bd03e6cdcba9e48e2197ff317008c (patch) | |
tree | 4deb0ba97656753605b956793da309dcc465f245 /examples/streaming_decompression.c | |
parent | affe9eaf7807e0a5c3aa99d79dece91c3bbc3854 (diff) |
Notes
Diffstat (limited to 'examples/streaming_decompression.c')
-rw-r--r-- | examples/streaming_decompression.c | 114 |
1 files changed, 0 insertions, 114 deletions
diff --git a/examples/streaming_decompression.c b/examples/streaming_decompression.c deleted file mode 100644 index bb2d80987081..000000000000 --- a/examples/streaming_decompression.c +++ /dev/null @@ -1,114 +0,0 @@ -/** - * Copyright 2016-present, Yann Collet, Facebook, Inc. - * All rights reserved. - * - * This source code is licensed under the license found in the - * LICENSE-examples file in the root directory of this source tree. - */ - - -#include <stdlib.h> // malloc, exit -#include <stdio.h> // fprintf, perror, feof -#include <string.h> // strerror -#include <errno.h> // errno -#include <zstd.h> // presumes zstd library is installed - - -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 decompressFile_orDie(const char* fname) -{ - FILE* const fin = fopen_orDie(fname, "rb"); - size_t const buffInSize = ZSTD_DStreamInSize(); - void* const buffIn = malloc_orDie(buffInSize); - FILE* const fout = stdout; - size_t const buffOutSize = ZSTD_DStreamOutSize(); /* Guarantee to successfully flush at least one complete compressed block in all circumstances. */ - void* const buffOut = malloc_orDie(buffOutSize); - - ZSTD_DStream* const dstream = ZSTD_createDStream(); - if (dstream==NULL) { fprintf(stderr, "ZSTD_createDStream() error \n"); exit(10); } - - /* In more complex scenarios, a file may consist of multiple appended frames (ex : pzstd). - * The following example decompresses only the first frame. - * It is compatible with other provided streaming examples */ - size_t const initResult = ZSTD_initDStream(dstream); - if (ZSTD_isError(initResult)) { fprintf(stderr, "ZSTD_initDStream() error : %s \n", ZSTD_getErrorName(initResult)); exit(11); } - size_t read, toRead = initResult; - while ( (read = fread_orDie(buffIn, toRead, fin)) ) { - ZSTD_inBuffer input = { buffIn, read, 0 }; - while (input.pos < input.size) { - ZSTD_outBuffer output = { buffOut, buffOutSize, 0 }; - toRead = ZSTD_decompressStream(dstream, &output , &input); /* toRead : size of next compressed block */ - if (ZSTD_isError(toRead)) { fprintf(stderr, "ZSTD_decompressStream() error : %s \n", ZSTD_getErrorName(toRead)); exit(12); } - fwrite_orDie(buffOut, output.pos, fout); - } - } - - ZSTD_freeDStream(dstream); - fclose_orDie(fin); - fclose_orDie(fout); - free(buffIn); - free(buffOut); -} - - -int main(int argc, const char** argv) -{ - const char* const exeName = argv[0]; - - if (argc!=2) { - fprintf(stderr, "wrong arguments\n"); - fprintf(stderr, "usage:\n"); - fprintf(stderr, "%s FILE\n", exeName); - return 1; - } - - const char* const inFilename = argv[1]; - - decompressFile_orDie(inFilename); - return 0; -} |