1// Copyright (c) 2012 The Chromium Authors. All rights reserved.
2// Use of this source code is governed by a BSD-style license that can be
3// found in the LICENSE file.
4
5#include "pdf/pdfium/pdfium_mem_buffer_file_read.h"
6
7#include <string.h>
8
9namespace chrome_pdf {
10
11PDFiumMemBufferFileRead::PDFiumMemBufferFileRead(const void* data,
12                                                 size_t size) {
13  m_FileLen = size;
14  m_Param = this;
15  m_GetBlock = &GetBlock;
16  data_ = reinterpret_cast<const unsigned char*>(data);
17}
18
19PDFiumMemBufferFileRead::~PDFiumMemBufferFileRead() {
20}
21
22int PDFiumMemBufferFileRead::GetBlock(void* param,
23                                      unsigned long position,
24                                      unsigned char* buf,
25                                      unsigned long size) {
26  const PDFiumMemBufferFileRead* data =
27      reinterpret_cast<const PDFiumMemBufferFileRead*>(param);
28  if (!data || position + size > data->m_FileLen)
29    return 0;
30  memcpy(buf, data->data_ + position, size);
31  return 1;
32}
33
34}  // namespace chrome_pdf
35