file_util.h

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// Copyright 2019 The PDFium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
 
#ifndef TESTING_UTILS_FILE_UTIL_H_
#define TESTING_UTILS_FILE_UTIL_H_
 
#include <stdint.h>
 
#include <string>
#include <vector>
 
#include "public/fpdfview.h"
 
// Reads the entire contents of a file into a vector. Returns an empty vector on
// failure. Note that this function assumes reading an empty file is not a valid
// use case, and treats such an action as a failure.
std::vector<uint8_t> GetFileContents(const char* filename);
 
// Use an ordinary file anywhere a FPDF_FILEACCESS is required.
class FileAccessForTesting final : public FPDF_FILEACCESS {
 public:
  explicit FileAccessForTesting(const std::string& file_name);
 
 private:
  static int SGetBlock(void* param,
                       unsigned long pos,
                       unsigned char* pBuf,
                       unsigned long size);
 
  int GetBlockImpl(unsigned long pos, unsigned char* pBuf, unsigned long size);
 
  std::vector<uint8_t> file_contents_;
};
 
#endif  // TESTING_UTILS_FILE_UTIL_H_