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Refactor examples to avoid code duplication.

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This commit is contained in:
Hung Dang
2018-12-06 22:42:19 -05:00
parent f6591e4a04
commit 0f52b0caad
8 changed files with 189 additions and 360 deletions
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46
examples/simple_decompression.c
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@ -15,50 +15,7 @@
#include <sys/stat.h> // stat
#define ZSTD_STATIC_LINKING_ONLY // ZSTD_findDecompressedSize
#include <zstd.h> // presumes zstd library is installed
static off_t fsize_orDie(const char *filename)
{
struct stat st;
if (stat(filename, &st) == 0) return st.st_size;
/* error */
fprintf(stderr, "stat: %s : %s \n", filename, strerror(errno));
exit(1);
}
static FILE* fopen_orDie(const char *filename, const char *instruction)
{
FILE* const inFile = fopen(filename, instruction);
if (inFile) return inFile;
/* error */
fprintf(stderr, "fopen: %s : %s \n", filename, strerror(errno));
exit(2);
}
static void* malloc_orDie(size_t size)
{
void* const buff = malloc(size + !size); /* avoid allocating size of 0 : may return NULL (implementation dependent) */
if (buff) return buff;
/* error */
fprintf(stderr, "malloc: %s \n", strerror(errno));
exit(3);
}
static void* loadFile_orDie(const char* fileName, size_t* size)
{
off_t const buffSize = fsize_orDie(fileName);
FILE* const inFile = fopen_orDie(fileName, "rb");
void* const buffer = malloc_orDie(buffSize);
size_t const readSize = fread(buffer, 1, buffSize, inFile);
if (readSize != (size_t)buffSize) {
fprintf(stderr, "fread: %s : %s \n", fileName, strerror(errno));
exit(4);
}
fclose(inFile); /* can't fail (read only) */
*size = buffSize;
return buffer;
}
#include "utils.h"
static void decompress(const char* fname)
{
@ -90,7 +47,6 @@ static void decompress(const char* fname)
free(cBuff);
}
int main(int argc, const char** argv)
{
const char* const exeName = argv[0];