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// Copyright 2016 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_object.h"
#include "core/fpdfapi/parser/cpdf_parser.h"
#include "core/fpdfapi/parser/cpdf_syntax_parser.h"
#include "core/fxcrt/cfx_readonlymemorystream.h"
#include "core/fxcrt/fx_extension.h"
#include "testing/gtest/include/gtest/gtest.h"
#include "testing/utils/path_service.h"
TEST(cpdf_syntax_parser, ReadHexString) {
{
// Empty string.
static const uint8_t data[] = "";
CPDF_SyntaxParser parser(pdfium::MakeRetain<CFX_ReadOnlyMemoryStream>(
pdfium::make_span(data, 0)));
EXPECT_EQ("", parser.ReadHexString());
EXPECT_EQ(0, parser.GetPos());
}
{
// Blank string.
static const uint8_t data[] = " ";
CPDF_SyntaxParser parser(pdfium::MakeRetain<CFX_ReadOnlyMemoryStream>(
pdfium::make_span(data, 2)));
EXPECT_EQ("", parser.ReadHexString());
EXPECT_EQ(2, parser.GetPos());
}
{
// Skips unknown characters.
static const uint8_t data[] = "z12b";
CPDF_SyntaxParser parser(pdfium::MakeRetain<CFX_ReadOnlyMemoryStream>(
pdfium::make_span(data, 4)));
EXPECT_EQ("\x12\xb0", parser.ReadHexString());
EXPECT_EQ(4, parser.GetPos());
}
{
// Skips unknown characters.
static const uint8_t data[] = "*<&*#$^&@1";
CPDF_SyntaxParser parser(pdfium::MakeRetain<CFX_ReadOnlyMemoryStream>(
pdfium::make_span(data, 10)));
EXPECT_EQ("\x10", parser.ReadHexString());
EXPECT_EQ(10, parser.GetPos());
}
{
// Skips unknown characters.
static const uint8_t data[] = "\x80zab";
CPDF_SyntaxParser parser(pdfium::MakeRetain<CFX_ReadOnlyMemoryStream>(
pdfium::make_span(data, 4)));
EXPECT_EQ("\xab", parser.ReadHexString());
EXPECT_EQ(4, parser.GetPos());
}
{
// Skips unknown characters.
static const uint8_t data[] = "\xffzab";
CPDF_SyntaxParser parser(pdfium::MakeRetain<CFX_ReadOnlyMemoryStream>(
pdfium::make_span(data, 4)));
EXPECT_EQ("\xab", parser.ReadHexString());
EXPECT_EQ(4, parser.GetPos());
}
{
// Regular conversion.
static const uint8_t data[] = "1A2b>abcd";
CPDF_SyntaxParser parser(pdfium::MakeRetain<CFX_ReadOnlyMemoryStream>(
pdfium::make_span(data, 9)));
EXPECT_EQ("\x1a\x2b", parser.ReadHexString());
EXPECT_EQ(5, parser.GetPos());
}
{
// Position out of bounds.
static const uint8_t data[] = "12ab>";
CPDF_SyntaxParser parser(pdfium::MakeRetain<CFX_ReadOnlyMemoryStream>(
pdfium::make_span(data, 5)));
parser.SetPos(5);
EXPECT_EQ("", parser.ReadHexString());
parser.SetPos(6);
EXPECT_EQ("", parser.ReadHexString());
parser.SetPos(-1);
EXPECT_EQ("", parser.ReadHexString());
parser.SetPos(std::numeric_limits<FX_FILESIZE>::max());
EXPECT_EQ("", parser.ReadHexString());
// Check string still parses when set to 0.
parser.SetPos(0);
EXPECT_EQ("\x12\xab", parser.ReadHexString());
}
{
// Missing ending >.
static const uint8_t data[] = "1A2b";
CPDF_SyntaxParser parser(pdfium::MakeRetain<CFX_ReadOnlyMemoryStream>(
pdfium::make_span(data, 4)));
EXPECT_EQ("\x1a\x2b", parser.ReadHexString());
EXPECT_EQ(4, parser.GetPos());
}
{
// Missing ending >.
static const uint8_t data[] = "12abz";
CPDF_SyntaxParser parser(pdfium::MakeRetain<CFX_ReadOnlyMemoryStream>(
pdfium::make_span(data, 5)));
EXPECT_EQ("\x12\xab", parser.ReadHexString());
EXPECT_EQ(5, parser.GetPos());
}
{
// Uneven number of bytes.
static const uint8_t data[] = "1A2>asdf";
CPDF_SyntaxParser parser(pdfium::MakeRetain<CFX_ReadOnlyMemoryStream>(
pdfium::make_span(data, 8)));
EXPECT_EQ("\x1a\x20", parser.ReadHexString());
EXPECT_EQ(4, parser.GetPos());
}
{
// Uneven number of bytes.
static const uint8_t data[] = "1A2zasdf";
CPDF_SyntaxParser parser(pdfium::MakeRetain<CFX_ReadOnlyMemoryStream>(
pdfium::make_span(data, 8)));
EXPECT_EQ("\x1a\x2a\xdf", parser.ReadHexString());
EXPECT_EQ(8, parser.GetPos());
}
{
// Just ending character.
static const uint8_t data[] = ">";
CPDF_SyntaxParser parser(pdfium::MakeRetain<CFX_ReadOnlyMemoryStream>(
pdfium::make_span(data, 1)));
EXPECT_EQ("", parser.ReadHexString());
EXPECT_EQ(1, parser.GetPos());
}
}
TEST(cpdf_syntax_parser, GetInvalidReference) {
// Data with a reference with number CPDF_Object::kInvalidObjNum
static const uint8_t data[] = "4294967295 0 R";
CPDF_SyntaxParser parser(pdfium::MakeRetain<CFX_ReadOnlyMemoryStream>(
pdfium::make_span(data, 14)));
RetainPtr<CPDF_Object> ref = parser.GetObjectBody(nullptr);
EXPECT_FALSE(ref);
}
TEST(cpdf_syntax_parser, PeekNextWord) {
static const uint8_t data[] = " WORD ";
CPDF_SyntaxParser parser(pdfium::MakeRetain<CFX_ReadOnlyMemoryStream>(data));
EXPECT_EQ("WORD", parser.PeekNextWord(nullptr));
EXPECT_EQ("WORD", parser.GetNextWord(nullptr));
}
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