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authorBaptiste Daroussin <bapt@FreeBSD.org>2017-08-18 11:27:10 +0000
committerBaptiste Daroussin <bapt@FreeBSD.org>2017-08-18 11:27:10 +0000
commit4ab113e3d97bd03e6cdcba9e48e2197ff317008c (patch)
tree4deb0ba97656753605b956793da309dcc465f245 /examples/streaming_decompression.c
parentaffe9eaf7807e0a5c3aa99d79dece91c3bbc3854 (diff)
Notes
Diffstat (limited to 'examples/streaming_decompression.c')
-rw-r--r--examples/streaming_decompression.c114
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;
-}