| // 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 <limits> |
| #include <string> |
| |
| #include "core/fpdfapi/parser/cpdf_parser.h" |
| #include "core/fpdfapi/parser/cpdf_syntax_parser.h" |
| #include "core/fxcrt/fx_extension.h" |
| #include "core/fxcrt/fx_stream.h" |
| #include "core/fxcrt/retain_ptr.h" |
| #include "testing/fx_string_testhelpers.h" |
| #include "testing/gtest/include/gtest/gtest.h" |
| #include "testing/utils/path_service.h" |
| |
| // A wrapper class to help test member functions of CPDF_Parser. |
| class CPDF_TestParser : public CPDF_Parser { |
| public: |
| CPDF_TestParser() {} |
| ~CPDF_TestParser() {} |
| |
| // Setup reading from a file and initial states. |
| bool InitTestFromFile(const char* path) { |
| RetainPtr<IFX_SeekableReadStream> pFileAccess = |
| IFX_SeekableReadStream::CreateFromFilename(path); |
| if (!pFileAccess) |
| return false; |
| |
| // For the test file, the header is set at the beginning. |
| m_pSyntax->InitParser(pFileAccess, 0); |
| return true; |
| } |
| |
| // Setup reading from a buffer and initial states. |
| bool InitTestFromBuffer(const unsigned char* buffer, size_t len) { |
| // For the test file, the header is set at the beginning. |
| m_pSyntax->InitParser( |
| pdfium::MakeRetain<CFX_BufferSeekableReadStream>(buffer, len), 0); |
| return true; |
| } |
| |
| private: |
| // Add test cases here as private friend so that protected members in |
| // CPDF_Parser can be accessed by test cases. |
| // Need to access RebuildCrossRef. |
| FRIEND_TEST(cpdf_parser, RebuildCrossRefCorrectly); |
| FRIEND_TEST(cpdf_parser, RebuildCrossRefFailed); |
| // Need to access LoadCrossRefV4. |
| FRIEND_TEST(cpdf_parser, LoadCrossRefV4); |
| }; |
| |
| TEST(cpdf_parser, RebuildCrossRefCorrectly) { |
| CPDF_TestParser parser; |
| std::string test_file; |
| ASSERT_TRUE(PathService::GetTestFilePath("parser_rebuildxref_correct.pdf", |
| &test_file)); |
| ASSERT_TRUE(parser.InitTestFromFile(test_file.c_str())) << test_file; |
| |
| ASSERT_TRUE(parser.RebuildCrossRef()); |
| const FX_FILESIZE offsets[] = {0, 15, 61, 154, 296, 374, 450}; |
| const uint16_t versions[] = {0, 0, 2, 4, 6, 8, 0}; |
| for (size_t i = 0; i < FX_ArraySize(offsets); ++i) |
| EXPECT_EQ(offsets[i], parser.m_ObjectInfo[i].pos); |
| for (size_t i = 0; i < FX_ArraySize(versions); ++i) |
| EXPECT_EQ(versions[i], parser.m_ObjectInfo[i].gennum); |
| } |
| |
| TEST(cpdf_parser, RebuildCrossRefFailed) { |
| CPDF_TestParser parser; |
| std::string test_file; |
| ASSERT_TRUE(PathService::GetTestFilePath( |
| "parser_rebuildxref_error_notrailer.pdf", &test_file)); |
| ASSERT_TRUE(parser.InitTestFromFile(test_file.c_str())) << test_file; |
| |
| ASSERT_FALSE(parser.RebuildCrossRef()); |
| } |
| |
| TEST(cpdf_parser, LoadCrossRefV4) { |
| { |
| const unsigned char xref_table[] = |
| "xref \n" |
| "0 6 \n" |
| "0000000003 65535 f \n" |
| "0000000017 00000 n \n" |
| "0000000081 00000 n \n" |
| "0000000000 00007 f \n" |
| "0000000331 00000 n \n" |
| "0000000409 00000 n \n" |
| "trail"; // Needed to end cross ref table reading. |
| CPDF_TestParser parser; |
| ASSERT_TRUE( |
| parser.InitTestFromBuffer(xref_table, FX_ArraySize(xref_table))); |
| |
| ASSERT_TRUE(parser.LoadCrossRefV4(0, false)); |
| const FX_FILESIZE offsets[] = {0, 17, 81, 0, 331, 409}; |
| const CPDF_TestParser::ObjectType types[] = { |
| CPDF_TestParser::ObjectType::kFree, |
| CPDF_TestParser::ObjectType::kNotCompressed, |
| CPDF_TestParser::ObjectType::kNotCompressed, |
| CPDF_TestParser::ObjectType::kFree, |
| CPDF_TestParser::ObjectType::kNotCompressed, |
| CPDF_TestParser::ObjectType::kNotCompressed}; |
| for (size_t i = 0; i < FX_ArraySize(offsets); ++i) { |
| EXPECT_EQ(offsets[i], parser.m_ObjectInfo[i].pos); |
| EXPECT_EQ(types[i], parser.m_ObjectInfo[i].type); |
| } |
| } |
| { |
| const unsigned char xref_table[] = |
| "xref \n" |
| "0 1 \n" |
| "0000000000 65535 f \n" |
| "3 1 \n" |
| "0000025325 00000 n \n" |
| "8 2 \n" |
| "0000025518 00002 n \n" |
| "0000025635 00000 n \n" |
| "12 1 \n" |
| "0000025777 00000 n \n" |
| "trail"; // Needed to end cross ref table reading. |
| CPDF_TestParser parser; |
| ASSERT_TRUE( |
| parser.InitTestFromBuffer(xref_table, FX_ArraySize(xref_table))); |
| |
| ASSERT_TRUE(parser.LoadCrossRefV4(0, false)); |
| const FX_FILESIZE offsets[] = {0, 0, 0, 25325, 0, 0, 0, |
| 0, 25518, 25635, 0, 0, 25777}; |
| const CPDF_TestParser::ObjectType types[] = { |
| CPDF_TestParser::ObjectType::kFree, |
| CPDF_TestParser::ObjectType::kFree, |
| CPDF_TestParser::ObjectType::kFree, |
| CPDF_TestParser::ObjectType::kNotCompressed, |
| CPDF_TestParser::ObjectType::kFree, |
| CPDF_TestParser::ObjectType::kFree, |
| CPDF_TestParser::ObjectType::kFree, |
| CPDF_TestParser::ObjectType::kFree, |
| CPDF_TestParser::ObjectType::kNotCompressed, |
| CPDF_TestParser::ObjectType::kNotCompressed, |
| CPDF_TestParser::ObjectType::kFree, |
| CPDF_TestParser::ObjectType::kFree, |
| CPDF_TestParser::ObjectType::kNotCompressed}; |
| for (size_t i = 0; i < FX_ArraySize(offsets); ++i) { |
| EXPECT_EQ(offsets[i], parser.m_ObjectInfo[i].pos); |
| EXPECT_EQ(types[i], parser.m_ObjectInfo[i].type); |
| } |
| } |
| { |
| const unsigned char xref_table[] = |
| "xref \n" |
| "0 1 \n" |
| "0000000000 65535 f \n" |
| "3 1 \n" |
| "0000025325 00000 n \n" |
| "8 2 \n" |
| "0000000000 65535 f \n" |
| "0000025635 00000 n \n" |
| "12 1 \n" |
| "0000025777 00000 n \n" |
| "trail"; // Needed to end cross ref table reading. |
| CPDF_TestParser parser; |
| ASSERT_TRUE( |
| parser.InitTestFromBuffer(xref_table, FX_ArraySize(xref_table))); |
| |
| ASSERT_TRUE(parser.LoadCrossRefV4(0, false)); |
| const FX_FILESIZE offsets[] = {0, 0, 0, 25325, 0, 0, 0, |
| 0, 0, 25635, 0, 0, 25777}; |
| const CPDF_TestParser::ObjectType types[] = { |
| CPDF_TestParser::ObjectType::kFree, |
| CPDF_TestParser::ObjectType::kFree, |
| CPDF_TestParser::ObjectType::kFree, |
| CPDF_TestParser::ObjectType::kNotCompressed, |
| CPDF_TestParser::ObjectType::kFree, |
| CPDF_TestParser::ObjectType::kFree, |
| CPDF_TestParser::ObjectType::kFree, |
| CPDF_TestParser::ObjectType::kFree, |
| CPDF_TestParser::ObjectType::kFree, |
| CPDF_TestParser::ObjectType::kNotCompressed, |
| CPDF_TestParser::ObjectType::kFree, |
| CPDF_TestParser::ObjectType::kFree, |
| CPDF_TestParser::ObjectType::kNotCompressed}; |
| for (size_t i = 0; i < FX_ArraySize(offsets); ++i) { |
| EXPECT_EQ(offsets[i], parser.m_ObjectInfo[i].pos); |
| EXPECT_EQ(types[i], parser.m_ObjectInfo[i].type); |
| } |
| } |
| { |
| const unsigned char xref_table[] = |
| "xref \n" |
| "0 7 \n" |
| "0000000002 65535 f \n" |
| "0000000023 00000 n \n" |
| "0000000003 65535 f \n" |
| "0000000004 65535 f \n" |
| "0000000000 65535 f \n" |
| "0000000045 00000 n \n" |
| "0000000179 00000 n \n" |
| "trail"; // Needed to end cross ref table reading. |
| CPDF_TestParser parser; |
| ASSERT_TRUE( |
| parser.InitTestFromBuffer(xref_table, FX_ArraySize(xref_table))); |
| |
| ASSERT_TRUE(parser.LoadCrossRefV4(0, false)); |
| const FX_FILESIZE offsets[] = {0, 23, 0, 0, 0, 45, 179}; |
| const CPDF_TestParser::ObjectType types[] = { |
| CPDF_TestParser::ObjectType::kFree, |
| CPDF_TestParser::ObjectType::kNotCompressed, |
| CPDF_TestParser::ObjectType::kFree, |
| CPDF_TestParser::ObjectType::kFree, |
| CPDF_TestParser::ObjectType::kFree, |
| CPDF_TestParser::ObjectType::kNotCompressed, |
| CPDF_TestParser::ObjectType::kNotCompressed}; |
| for (size_t i = 0; i < FX_ArraySize(offsets); ++i) { |
| EXPECT_EQ(offsets[i], parser.m_ObjectInfo[i].pos); |
| EXPECT_EQ(types[i], parser.m_ObjectInfo[i].type); |
| } |
| } |
| } |