1 // Copyright 2015 The PDFium Authors
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 "core/fpdfapi/font/cpdf_cmapparser.h"
6
7 #include "core/fxcrt/span.h"
8 #include "core/fxcrt/span_util.h"
9 #include "testing/gtest/include/gtest/gtest.h"
10
11 namespace {
12
13 // Helps with default construction of the appropriate span rather than
14 // writing make_span() and using span_equal() directly.
uint_ranges_equal(pdfium::span<const uint8_t> a,pdfium::span<const uint8_t> b)15 bool uint_ranges_equal(pdfium::span<const uint8_t> a,
16 pdfium::span<const uint8_t> b) {
17 return fxcrt::span_equals(a, b);
18 }
19
20 } // namespace
21
TEST(CPDFCMapParserTest,GetCode)22 TEST(CPDFCMapParserTest, GetCode) {
23 EXPECT_EQ(0u, CPDF_CMapParser::GetCode(""));
24 EXPECT_EQ(0u, CPDF_CMapParser::GetCode("<"));
25 EXPECT_EQ(194u, CPDF_CMapParser::GetCode("<c2"));
26 EXPECT_EQ(162u, CPDF_CMapParser::GetCode("<A2"));
27 EXPECT_EQ(2802u, CPDF_CMapParser::GetCode("<Af2"));
28 EXPECT_EQ(162u, CPDF_CMapParser::GetCode("<A2z"));
29
30 EXPECT_EQ(12u, CPDF_CMapParser::GetCode("12"));
31 EXPECT_EQ(12u, CPDF_CMapParser::GetCode("12d"));
32 EXPECT_EQ(128u, CPDF_CMapParser::GetCode("128"));
33
34 EXPECT_EQ(4294967295u, CPDF_CMapParser::GetCode("<FFFFFFFF"));
35
36 // Overflow a uint32_t.
37 EXPECT_EQ(0u, CPDF_CMapParser::GetCode("<100000000"));
38 }
39
TEST(CPDFCMapParserTest,GetCodeRange)40 TEST(CPDFCMapParserTest, GetCodeRange) {
41 std::optional<CPDF_CMap::CodeRange> range;
42
43 // Must start with a <
44 range = CPDF_CMapParser::GetCodeRange("", "");
45 EXPECT_FALSE(range.has_value());
46 range = CPDF_CMapParser::GetCodeRange("A", "");
47 EXPECT_FALSE(range.has_value());
48
49 // m_CharSize must be <= 4
50 range = CPDF_CMapParser::GetCodeRange("<aaaaaaaaaa>", "");
51 EXPECT_FALSE(range.has_value());
52
53 range = CPDF_CMapParser::GetCodeRange("<12345678>", "<87654321>");
54 ASSERT_TRUE(range.has_value());
55 ASSERT_EQ(4u, range.value().m_CharSize);
56 {
57 constexpr uint8_t kLower[4] = {18, 52, 86, 120};
58 constexpr uint8_t kUpper[4] = {135, 101, 67, 33};
59 EXPECT_TRUE(uint_ranges_equal(kLower, range.value().m_Lower));
60 EXPECT_TRUE(uint_ranges_equal(kUpper, range.value().m_Upper));
61 }
62
63 // Hex characters
64 range = CPDF_CMapParser::GetCodeRange("<a1>", "<F3>");
65 ASSERT_TRUE(range.has_value());
66 ASSERT_EQ(1u, range.value().m_CharSize);
67 EXPECT_EQ(161, range.value().m_Lower[0]);
68 EXPECT_EQ(243, range.value().m_Upper[0]);
69
70 // The second string should return 0's if it is shorter
71 range = CPDF_CMapParser::GetCodeRange("<a1>", "");
72 ASSERT_TRUE(range.has_value());
73 ASSERT_EQ(1u, range.value().m_CharSize);
74 EXPECT_EQ(161, range.value().m_Lower[0]);
75 EXPECT_EQ(0, range.value().m_Upper[0]);
76 }
77