1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
|
// Copyright 2015 PDFium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include <algorithm>
#include <memory>
#include <string>
#include <vector>
#include "public/fpdfview.h"
#include "testing/embedder_test.h"
#include "testing/gtest/include/gtest/gtest.h"
#include "testing/test_support.h"
#include "testing/utils/path_service.h"
namespace {
class TestAsyncLoader : public FX_DOWNLOADHINTS, FX_FILEAVAIL {
public:
TestAsyncLoader(const std::string& file_name) {
std::string file_path;
if (!PathService::GetTestFilePath(file_name, &file_path))
return;
file_contents_ = GetFileContents(file_path.c_str(), &file_length_);
if (!file_contents_)
return;
file_access_.m_FileLen = static_cast<unsigned long>(file_length_);
file_access_.m_GetBlock = SGetBlock;
file_access_.m_Param = this;
FX_DOWNLOADHINTS::version = 1;
FX_DOWNLOADHINTS::AddSegment = SAddSegment;
FX_FILEAVAIL::version = 1;
FX_FILEAVAIL::IsDataAvail = SIsDataAvail;
}
bool IsOpened() const { return !!file_contents_; }
FPDF_FILEACCESS* file_access() { return &file_access_; }
FX_DOWNLOADHINTS* hints() { return this; }
FX_FILEAVAIL* file_avail() { return this; }
const std::vector<std::pair<size_t, size_t>>& requested_segments() const {
return requested_segments_;
}
void ClearRequestedSegments() { requested_segments_.clear(); }
bool is_new_data_available() const { return is_new_data_available_; }
void set_is_new_data_available(bool is_new_data_available) {
is_new_data_available_ = is_new_data_available;
}
private:
void SetDataAvailable(size_t start, size_t size) {
if (size == 0)
return;
const auto range = std::make_pair(start, start + size);
if (available_ranges_.empty()) {
available_ranges_.insert(range);
return;
}
auto start_it = available_ranges_.upper_bound(range);
if (start_it != available_ranges_.begin())
--start_it; // start now points to the key equal or lower than offset.
if (start_it->second < range.first)
++start_it; // start element is entirely before current range, skip it.
auto end_it = available_ranges_.upper_bound(
std::make_pair(range.second, range.second));
if (start_it == end_it) { // No ranges to merge.
available_ranges_.insert(range);
return;
}
--end_it;
size_t new_start = std::min<size_t>(start_it->first, range.first);
size_t new_end = std::max(end_it->second, range.second);
available_ranges_.erase(start_it, ++end_it);
available_ranges_.insert(std::make_pair(new_start, new_end));
}
bool CheckDataAlreadyAvailable(size_t start, size_t size) const {
if (size == 0)
return false;
const auto range = std::make_pair(start, start + size);
auto it = available_ranges_.upper_bound(range);
if (it == available_ranges_.begin())
return false; // No ranges includes range.start().
--it; // Now it starts equal or before range.start().
return it->second >= range.second;
}
int GetBlockImpl(unsigned long pos, unsigned char* pBuf, unsigned long size) {
if (!IsDataAvailImpl(pos, size))
return 0;
const unsigned long end =
std::min(static_cast<unsigned long>(file_length_), pos + size);
if (end <= pos)
return 0;
memcpy(pBuf, file_contents_.get() + pos, end - pos);
SetDataAvailable(pos, end - pos);
return static_cast<int>(end - pos);
}
void AddSegmentImpl(size_t offset, size_t size) {
requested_segments_.push_back(std::make_pair(offset, size));
}
bool IsDataAvailImpl(size_t offset, size_t size) {
if (offset + size > file_length_)
return false;
if (is_new_data_available_) {
SetDataAvailable(offset, size);
return true;
}
return CheckDataAlreadyAvailable(offset, size);
}
static int SGetBlock(void* param,
unsigned long pos,
unsigned char* pBuf,
unsigned long size) {
return static_cast<TestAsyncLoader*>(param)->GetBlockImpl(pos, pBuf, size);
}
static void SAddSegment(FX_DOWNLOADHINTS* pThis, size_t offset, size_t size) {
return static_cast<TestAsyncLoader*>(pThis)->AddSegmentImpl(offset, size);
}
static FPDF_BOOL SIsDataAvail(FX_FILEAVAIL* pThis,
size_t offset,
size_t size) {
return static_cast<TestAsyncLoader*>(pThis)->IsDataAvailImpl(offset, size);
}
FPDF_FILEACCESS file_access_;
std::unique_ptr<char, pdfium::FreeDeleter> file_contents_;
size_t file_length_;
std::vector<std::pair<size_t, size_t>> requested_segments_;
bool is_new_data_available_ = true;
using Range = std::pair<size_t, size_t>;
struct range_compare {
bool operator()(const Range& lval, const Range& rval) const {
return lval.first < rval.first;
}
};
using RangesContainer = std::set<Range, range_compare>;
RangesContainer available_ranges_;
};
} // namespace
class FPDFDataAvailEmbeddertest : public EmbedderTest {};
TEST_F(FPDFDataAvailEmbeddertest, TrailerUnterminated) {
// Document must load without crashing but is too malformed to be available.
EXPECT_FALSE(OpenDocument("trailer_unterminated.pdf"));
EXPECT_FALSE(FPDFAvail_IsDocAvail(avail_, &hints_));
}
TEST_F(FPDFDataAvailEmbeddertest, TrailerAsHexstring) {
// Document must load without crashing but is too malformed to be available.
EXPECT_FALSE(OpenDocument("trailer_as_hexstring.pdf"));
EXPECT_FALSE(FPDFAvail_IsDocAvail(avail_, &hints_));
}
TEST_F(FPDFDataAvailEmbeddertest, LoadUsingHintTables) {
TestAsyncLoader loader("feature_linearized_loading.pdf");
avail_ = FPDFAvail_Create(loader.file_avail(), loader.file_access());
ASSERT_EQ(PDF_DATA_AVAIL, FPDFAvail_IsDocAvail(avail_, loader.hints()));
document_ = FPDFAvail_GetDocument(avail_, nullptr);
ASSERT_TRUE(document_);
ASSERT_EQ(PDF_DATA_AVAIL, FPDFAvail_IsPageAvail(avail_, 1, loader.hints()));
// No new data available, to prevent load "Pages" node.
loader.set_is_new_data_available(false);
FPDF_PAGE page = LoadPage(1);
EXPECT_TRUE(page);
UnloadPage(page);
}
|