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// 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 "core/include/fpdfapi/fpdf_parser.h"
#include "core/include/fxcrt/fx_stream.h"
#include "testing/gtest/include/gtest/gtest.h"
#include "testing/utils/path_service.h"
class CPDF_TestParser : public CPDF_Parser {
public:
CPDF_TestParser() {}
~CPDF_TestParser() {}
bool InitTest(const FX_CHAR* path) {
IFX_FileRead* pFileAccess = FX_CreateFileRead(path);
if (!pFileAccess)
return false;
// For the test file, the header is set at the beginning.
m_Syntax.InitParser(pFileAccess, 0);
return true;
}
private:
// Add test case as private friend so that RebuildCrossRef in CPDF_Parser
// can be accessed.
FRIEND_TEST(fpdf_parser_parser, RebuildCrossRefCorrectly);
FRIEND_TEST(fpdf_parser_parser, RebuildCrossRefFailed);
};
// TODO(thestig) Using unique_ptr with ReleaseDeleter is still not ideal.
// Come up or wait for something better.
using ScopedFileStream =
nonstd::unique_ptr<IFX_FileStream, ReleaseDeleter<IFX_FileStream>>;
TEST(fpdf_parser_parser, ReadHexString) {
{
// Empty string.
uint8_t data[] = "";
ScopedFileStream stream(FX_CreateMemoryStream(data, 0, FALSE));
CPDF_SyntaxParser parser;
parser.InitParser(stream.get(), 0);
EXPECT_EQ("", parser.ReadHexString());
EXPECT_EQ(0, parser.SavePos());
}
{
// Blank string.
uint8_t data[] = " ";
ScopedFileStream stream(FX_CreateMemoryStream(data, 2, FALSE));
CPDF_SyntaxParser parser;
parser.InitParser(stream.get(), 0);
EXPECT_EQ("", parser.ReadHexString());
EXPECT_EQ(2, parser.SavePos());
}
{
// Skips unknown characters.
uint8_t data[] = "z12b";
ScopedFileStream stream(FX_CreateMemoryStream(data, 4, FALSE));
CPDF_SyntaxParser parser;
parser.InitParser(stream.get(), 0);
EXPECT_EQ("\x12\xb0", parser.ReadHexString());
EXPECT_EQ(4, parser.SavePos());
}
{
// Skips unknown characters.
uint8_t data[] = "*<&*#$^&@1";
ScopedFileStream stream(FX_CreateMemoryStream(data, 10, FALSE));
CPDF_SyntaxParser parser;
parser.InitParser(stream.get(), 0);
EXPECT_EQ("\x10", parser.ReadHexString());
EXPECT_EQ(10, parser.SavePos());
}
{
// Skips unknown characters.
uint8_t data[] = "\x80zab";
ScopedFileStream stream(FX_CreateMemoryStream(data, 4, FALSE));
CPDF_SyntaxParser parser;
parser.InitParser(stream.get(), 0);
EXPECT_EQ("\xab", parser.ReadHexString());
EXPECT_EQ(4, parser.SavePos());
}
{
// Skips unknown characters.
uint8_t data[] = "\xffzab";
ScopedFileStream stream(FX_CreateMemoryStream(data, 4, FALSE));
CPDF_SyntaxParser parser;
parser.InitParser(stream.get(), 0);
EXPECT_EQ("\xab", parser.ReadHexString());
EXPECT_EQ(4, parser.SavePos());
}
{
// Regular conversion.
uint8_t data[] = "1A2b>abcd";
ScopedFileStream stream(FX_CreateMemoryStream(data, 9, FALSE));
CPDF_SyntaxParser parser;
parser.InitParser(stream.get(), 0);
EXPECT_EQ("\x1a\x2b", parser.ReadHexString());
EXPECT_EQ(5, parser.SavePos());
}
{
// Position out of bounds.
uint8_t data[] = "12ab>";
ScopedFileStream stream(FX_CreateMemoryStream(data, 5, FALSE));
CPDF_SyntaxParser parser;
parser.InitParser(stream.get(), 0);
parser.RestorePos(5);
EXPECT_EQ("", parser.ReadHexString());
parser.RestorePos(6);
EXPECT_EQ("", parser.ReadHexString());
parser.RestorePos(-1);
EXPECT_EQ("", parser.ReadHexString());
parser.RestorePos(std::numeric_limits<FX_FILESIZE>::max());
EXPECT_EQ("", parser.ReadHexString());
// Check string still parses when set to 0.
parser.RestorePos(0);
EXPECT_EQ("\x12\xab", parser.ReadHexString());
}
{
// Missing ending >.
uint8_t data[] = "1A2b";
ScopedFileStream stream(FX_CreateMemoryStream(data, 4, FALSE));
CPDF_SyntaxParser parser;
parser.InitParser(stream.get(), 0);
EXPECT_EQ("\x1a\x2b", parser.ReadHexString());
EXPECT_EQ(4, parser.SavePos());
}
{
// Missing ending >.
uint8_t data[] = "12abz";
ScopedFileStream stream(FX_CreateMemoryStream(data, 5, FALSE));
CPDF_SyntaxParser parser;
parser.InitParser(stream.get(), 0);
EXPECT_EQ("\x12\xab", parser.ReadHexString());
EXPECT_EQ(5, parser.SavePos());
}
{
// Uneven number of bytes.
uint8_t data[] = "1A2>asdf";
ScopedFileStream stream(FX_CreateMemoryStream(data, 8, FALSE));
CPDF_SyntaxParser parser;
parser.InitParser(stream.get(), 0);
EXPECT_EQ("\x1a\x20", parser.ReadHexString());
EXPECT_EQ(4, parser.SavePos());
}
{
// Uneven number of bytes.
uint8_t data[] = "1A2zasdf";
ScopedFileStream stream(FX_CreateMemoryStream(data, 8, FALSE));
CPDF_SyntaxParser parser;
parser.InitParser(stream.get(), 0);
EXPECT_EQ("\x1a\x2a\xdf", parser.ReadHexString());
EXPECT_EQ(8, parser.SavePos());
}
{
// Just ending character.
uint8_t data[] = ">";
ScopedFileStream stream(FX_CreateMemoryStream(data, 1, FALSE));
CPDF_SyntaxParser parser;
parser.InitParser(stream.get(), 0);
EXPECT_EQ("", parser.ReadHexString());
EXPECT_EQ(1, parser.SavePos());
}
}
TEST(fpdf_parser_parser, RebuildCrossRefCorrectly) {
CPDF_TestParser parser;
std::string test_file;
ASSERT_TRUE(PathService::GetTestFilePath("parser_rebuildxref_correct.pdf",
&test_file));
ASSERT_TRUE(parser.InitTest(test_file.c_str())) << test_file;
ASSERT_TRUE(parser.RebuildCrossRef());
const FX_FILESIZE offsets[] = {0, 15, 61, 154, 296, 374, 450};
const FX_WORD versions[] = {0, 0, 2, 4, 6, 8, 0};
static_assert(FX_ArraySize(offsets) == FX_ArraySize(versions),
"numbers of offsets and versions should be same.");
ASSERT_EQ(FX_ArraySize(offsets), parser.m_CrossRef.GetSize());
ASSERT_EQ(FX_ArraySize(versions), parser.m_ObjVersion.GetSize());
for (int i = 0; i < FX_ArraySize(offsets); ++i) {
EXPECT_EQ(offsets[i], parser.m_CrossRef.GetAt(i));
EXPECT_EQ(versions[i], parser.m_ObjVersion.GetAt(i));
}
}
TEST(fpdf_parser_parser, RebuildCrossRefFailed) {
CPDF_TestParser parser;
std::string test_file;
ASSERT_TRUE(PathService::GetTestFilePath(
"parser_rebuildxref_error_notrailer.pdf", &test_file));
ASSERT_TRUE(parser.InitTest(test_file.c_str())) << test_file;
ASSERT_FALSE(parser.RebuildCrossRef());
}
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