testing/utils/file_util.cpp

// Copyright 2019 PDFium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include "testing/utils/file_util.h"

#include <stdio.h>

std::unique_ptr<char, pdfium::FreeDeleter> GetFileContents(const char* filename,
                                                           size_t* retlen) {
  FILE* file = fopen(filename, "rb");
  if (!file) {
    fprintf(stderr, "Failed to open: %s\n", filename);
    return nullptr;
  }
  (void)fseek(file, 0, SEEK_END);
  size_t file_length = ftell(file);
  if (!file_length) {
    return nullptr;
  }
  (void)fseek(file, 0, SEEK_SET);
  std::unique_ptr<char, pdfium::FreeDeleter> buffer(
      static_cast<char*>(malloc(file_length)));
  if (!buffer) {
    return nullptr;
  }
  size_t bytes_read = fread(buffer.get(), 1, file_length, file);
  (void)fclose(file);
  if (bytes_read != file_length) {
    fprintf(stderr, "Failed to read: %s\n", filename);
    return nullptr;
  }
  *retlen = bytes_read;
  return buffer;
}