5227d99146
the prototypes are already marked in the headers Change-Id: I172fe742200c939ca32a70a2299809b8baf9b094
73 lines
1.9 KiB
C
73 lines
1.9 KiB
C
// Copyright 2012 Google Inc. All Rights Reserved.
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//
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// Use of this source code is governed by a BSD-style license
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// that can be found in the COPYING file in the root of the source
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// tree. An additional intellectual property rights grant can be found
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// in the file PATENTS. All contributing project authors may
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// be found in the AUTHORS file in the root of the source tree.
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// -----------------------------------------------------------------------------
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//
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// Utility functions used by the example programs.
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//
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#include "./example_util.h"
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#include <stdio.h>
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#include <stdlib.h>
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// -----------------------------------------------------------------------------
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// File I/O
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int ExUtilReadFile(const char* const file_name,
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const uint8_t** data, size_t* data_size) {
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int ok;
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void* file_data;
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size_t file_size;
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FILE* in;
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if (file_name == NULL || data == NULL || data_size == NULL) return 0;
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*data = NULL;
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*data_size = 0;
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in = fopen(file_name, "rb");
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if (in == NULL) {
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fprintf(stderr, "cannot open input file '%s'\n", file_name);
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return 0;
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}
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fseek(in, 0, SEEK_END);
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file_size = ftell(in);
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fseek(in, 0, SEEK_SET);
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file_data = malloc(file_size);
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if (file_data == NULL) return 0;
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ok = (fread(file_data, file_size, 1, in) == 1);
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fclose(in);
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if (!ok) {
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fprintf(stderr, "Could not read %d bytes of data from file %s\n",
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(int)file_size, file_name);
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free(file_data);
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return 0;
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}
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*data = (uint8_t*)file_data;
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*data_size = file_size;
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return 1;
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}
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int ExUtilWriteFile(const char* const file_name,
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const uint8_t* data, size_t data_size) {
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int ok;
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FILE* out;
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if (file_name == NULL || data == NULL) {
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return 0;
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}
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out = fopen(file_name, "wb");
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if (out == NULL) {
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fprintf(stderr, "Error! Cannot open output file '%s'\n", file_name);
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return 0;
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}
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ok = (fwrite(data, data_size, 1, out) == 1);
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fclose(out);
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return ok;
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}
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