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 <stddef.h>
8 #include <string.h>
9
10 namespace chrome_pdf {
11
PDFiumMemBufferFileRead(const void * data,size_t size)12 PDFiumMemBufferFileRead::PDFiumMemBufferFileRead(const void* data,
13 size_t size) {
14 m_FileLen = size;
15 m_Param = this;
16 m_GetBlock = &GetBlock;
17 data_ = reinterpret_cast<const unsigned char*>(data);
18 }
19
20 PDFiumMemBufferFileRead::~PDFiumMemBufferFileRead() = default;
21
GetBlock(void * param,unsigned long position,unsigned char * buf,unsigned long size)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
35