Refactor examples to avoid code duplication.

examples/dictionary_compression.c

@@ -7,71 +7,13 @@
  * 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 <stdlib.h>    // malloc, exit
 #include <stdio.h>     // printf
 #include <string.h>    // strerror
 #include <errno.h>     // errno
 #include <sys/stat.h>  // stat
 #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 */
-    perror(filename);
-    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(2);
-}
-
-static void* malloc_orDie(size_t size)
-{
-    void* const buff = malloc(size);
-    if (buff) return buff;
-    /* error */
-    perror("malloc");
-    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);
-    *size = buffSize;
-    return buffer;
-}
-
-static void saveFile_orDie(const char* fileName, const void* buff, size_t buffSize)
-{
-    FILE* const oFile = fopen_orDie(fileName, "wb");
-    size_t const wSize = fwrite(buff, 1, buffSize, oFile);
-    if (wSize != (size_t)buffSize) {
-        fprintf(stderr, "fwrite: %s : %s \n", fileName, strerror(errno));
-        exit(5);
-    }
-    if (fclose(oFile)) {
-        perror(fileName);
-        exit(6);
-    }
-}
+#include "utils.h"
 
 /* createDict() :
    `dictFileName` is supposed to have been created using `zstd --train` */