pdf/pdfium/pdfium_mem_buffer_file_read.cc

   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
   9 namespace chrome_pdf {
  10
  11 PDFiumMemBufferFileRead::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
  19 PDFiumMemBufferFileRead::~PDFiumMemBufferFileRead() {
  20 }
  21
  22 int 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