webp/examples/example_util.c
James Zern 5227d99146 drop: ifdef __cplusplus checks from C files
the prototypes are already marked in the headers

Change-Id: I172fe742200c939ca32a70a2299809b8baf9b094
2013-12-13 11:42:13 -08:00

73 lines
1.9 KiB
C

// Copyright 2012 Google Inc. All Rights Reserved.
//
// Use of this source code is governed by a BSD-style license
// that can be found in the COPYING file in the root of the source
// tree. An additional intellectual property rights grant can be found
// in the file PATENTS. All contributing project authors may
// be found in the AUTHORS file in the root of the source tree.
// -----------------------------------------------------------------------------
//
// Utility functions used by the example programs.
//
#include "./example_util.h"
#include <stdio.h>
#include <stdlib.h>
// -----------------------------------------------------------------------------
// File I/O
int ExUtilReadFile(const char* const file_name,
const uint8_t** data, size_t* data_size) {
int ok;
void* file_data;
size_t file_size;
FILE* in;
if (file_name == NULL || data == NULL || data_size == NULL) return 0;
*data = NULL;
*data_size = 0;
in = fopen(file_name, "rb");
if (in == NULL) {
fprintf(stderr, "cannot open input file '%s'\n", file_name);
return 0;
}
fseek(in, 0, SEEK_END);
file_size = ftell(in);
fseek(in, 0, SEEK_SET);
file_data = malloc(file_size);
if (file_data == NULL) return 0;
ok = (fread(file_data, file_size, 1, in) == 1);
fclose(in);
if (!ok) {
fprintf(stderr, "Could not read %d bytes of data from file %s\n",
(int)file_size, file_name);
free(file_data);
return 0;
}
*data = (uint8_t*)file_data;
*data_size = file_size;
return 1;
}
int ExUtilWriteFile(const char* const file_name,
const uint8_t* data, size_t data_size) {
int ok;
FILE* out;
if (file_name == NULL || data == NULL) {
return 0;
}
out = fopen(file_name, "wb");
if (out == NULL) {
fprintf(stderr, "Error! Cannot open output file '%s'\n", file_name);
return 0;
}
ok = (fwrite(data, data_size, 1, out) == 1);
fclose(out);
return ok;
}