1 // Copyright 2019 PDFium 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 "testing/utils/file_util.h"
6
7 #include <stdio.h>
8 #include <string.h>
9
10 #include "testing/utils/path_service.h"
11
GetFileContents(const char * filename,size_t * retlen)12 std::unique_ptr<char, pdfium::FreeDeleter> GetFileContents(const char* filename,
13 size_t* retlen) {
14 FILE* file = fopen(filename, "rb");
15 if (!file) {
16 fprintf(stderr, "Failed to open: %s\n", filename);
17 return nullptr;
18 }
19 (void)fseek(file, 0, SEEK_END);
20 size_t file_length = ftell(file);
21 if (!file_length) {
22 return nullptr;
23 }
24 (void)fseek(file, 0, SEEK_SET);
25 std::unique_ptr<char, pdfium::FreeDeleter> buffer(
26 static_cast<char*>(malloc(file_length)));
27 if (!buffer) {
28 return nullptr;
29 }
30 size_t bytes_read = fread(buffer.get(), 1, file_length, file);
31 (void)fclose(file);
32 if (bytes_read != file_length) {
33 fprintf(stderr, "Failed to read: %s\n", filename);
34 return nullptr;
35 }
36 *retlen = bytes_read;
37 return buffer;
38 }
39
FileAccessForTesting(const std::string & file_name)40 FileAccessForTesting::FileAccessForTesting(const std::string& file_name) {
41 std::string file_path;
42 if (!PathService::GetTestFilePath(file_name, &file_path))
43 return;
44
45 file_contents_ = GetFileContents(file_path.c_str(), &file_length_);
46 if (!file_contents_)
47 return;
48
49 m_FileLen = static_cast<unsigned long>(file_length_);
50 m_GetBlock = SGetBlock;
51 m_Param = this;
52 }
53
GetBlockImpl(unsigned long pos,unsigned char * pBuf,unsigned long size)54 int FileAccessForTesting::GetBlockImpl(unsigned long pos,
55 unsigned char* pBuf,
56 unsigned long size) {
57 memcpy(pBuf, file_contents_.get() + pos, size);
58 return size;
59 }
60
61 // static
SGetBlock(void * param,unsigned long pos,unsigned char * pBuf,unsigned long size)62 int FileAccessForTesting::SGetBlock(void* param,
63 unsigned long pos,
64 unsigned char* pBuf,
65 unsigned long size) {
66 auto* file_access = static_cast<FileAccessForTesting*>(param);
67 return file_access->GetBlockImpl(pos, pBuf, size);
68 }
69