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1 // Copyright 2016 PDFium Authors. All rights reserved. | 1 // Copyright 2016 PDFium Authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 // Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com | 5 // Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com |
6 | 6 |
7 #include "core/fpdfapi/fpdf_parser/include/cpdf_simple_parser.h" | 7 #include "core/fpdfapi/fpdf_parser/include/cpdf_simple_parser.h" |
8 | 8 |
9 #include "core/fpdfapi/fpdf_parser/fpdf_parser_utility.h" | 9 #include "core/fpdfapi/fpdf_parser/fpdf_parser_utility.h" |
10 | 10 |
11 CPDF_SimpleParser::CPDF_SimpleParser(const uint8_t* pData, FX_DWORD dwSize) | 11 CPDF_SimpleParser::CPDF_SimpleParser(const uint8_t* pData, uint32_t dwSize) |
12 : m_pData(pData), m_dwSize(dwSize), m_dwCurPos(0) {} | 12 : m_pData(pData), m_dwSize(dwSize), m_dwCurPos(0) {} |
13 | 13 |
14 CPDF_SimpleParser::CPDF_SimpleParser(const CFX_ByteStringC& str) | 14 CPDF_SimpleParser::CPDF_SimpleParser(const CFX_ByteStringC& str) |
15 : m_pData(str.GetPtr()), m_dwSize(str.GetLength()), m_dwCurPos(0) {} | 15 : m_pData(str.GetPtr()), m_dwSize(str.GetLength()), m_dwCurPos(0) {} |
16 | 16 |
17 void CPDF_SimpleParser::ParseWord(const uint8_t*& pStart, FX_DWORD& dwSize) { | 17 void CPDF_SimpleParser::ParseWord(const uint8_t*& pStart, uint32_t& dwSize) { |
18 pStart = nullptr; | 18 pStart = nullptr; |
19 dwSize = 0; | 19 dwSize = 0; |
20 uint8_t ch; | 20 uint8_t ch; |
21 while (1) { | 21 while (1) { |
22 if (m_dwSize <= m_dwCurPos) | 22 if (m_dwSize <= m_dwCurPos) |
23 return; | 23 return; |
24 ch = m_pData[m_dwCurPos++]; | 24 ch = m_pData[m_dwCurPos++]; |
25 while (PDFCharIsWhitespace(ch)) { | 25 while (PDFCharIsWhitespace(ch)) { |
26 if (m_dwSize <= m_dwCurPos) | 26 if (m_dwSize <= m_dwCurPos) |
27 return; | 27 return; |
28 ch = m_pData[m_dwCurPos++]; | 28 ch = m_pData[m_dwCurPos++]; |
29 } | 29 } |
30 | 30 |
31 if (ch != '%') | 31 if (ch != '%') |
32 break; | 32 break; |
33 | 33 |
34 while (1) { | 34 while (1) { |
35 if (m_dwSize <= m_dwCurPos) | 35 if (m_dwSize <= m_dwCurPos) |
36 return; | 36 return; |
37 ch = m_pData[m_dwCurPos++]; | 37 ch = m_pData[m_dwCurPos++]; |
38 if (PDFCharIsLineEnding(ch)) | 38 if (PDFCharIsLineEnding(ch)) |
39 break; | 39 break; |
40 } | 40 } |
41 } | 41 } |
42 | 42 |
43 FX_DWORD start_pos = m_dwCurPos - 1; | 43 uint32_t start_pos = m_dwCurPos - 1; |
44 pStart = m_pData + start_pos; | 44 pStart = m_pData + start_pos; |
45 if (PDFCharIsDelimiter(ch)) { | 45 if (PDFCharIsDelimiter(ch)) { |
46 if (ch == '/') { | 46 if (ch == '/') { |
47 while (1) { | 47 while (1) { |
48 if (m_dwSize <= m_dwCurPos) | 48 if (m_dwSize <= m_dwCurPos) |
49 return; | 49 return; |
50 ch = m_pData[m_dwCurPos++]; | 50 ch = m_pData[m_dwCurPos++]; |
51 if (!PDFCharIsOther(ch) && !PDFCharIsNumeric(ch)) { | 51 if (!PDFCharIsOther(ch) && !PDFCharIsNumeric(ch)) { |
52 m_dwCurPos--; | 52 m_dwCurPos--; |
53 dwSize = m_dwCurPos - start_pos; | 53 dwSize = m_dwCurPos - start_pos; |
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86 if (PDFCharIsDelimiter(ch) || PDFCharIsWhitespace(ch)) { | 86 if (PDFCharIsDelimiter(ch) || PDFCharIsWhitespace(ch)) { |
87 m_dwCurPos--; | 87 m_dwCurPos--; |
88 break; | 88 break; |
89 } | 89 } |
90 dwSize++; | 90 dwSize++; |
91 } | 91 } |
92 } | 92 } |
93 | 93 |
94 CFX_ByteStringC CPDF_SimpleParser::GetWord() { | 94 CFX_ByteStringC CPDF_SimpleParser::GetWord() { |
95 const uint8_t* pStart; | 95 const uint8_t* pStart; |
96 FX_DWORD dwSize; | 96 uint32_t dwSize; |
97 ParseWord(pStart, dwSize); | 97 ParseWord(pStart, dwSize); |
98 if (dwSize == 1 && pStart[0] == '<') { | 98 if (dwSize == 1 && pStart[0] == '<') { |
99 while (m_dwCurPos < m_dwSize && m_pData[m_dwCurPos] != '>') { | 99 while (m_dwCurPos < m_dwSize && m_pData[m_dwCurPos] != '>') { |
100 m_dwCurPos++; | 100 m_dwCurPos++; |
101 } | 101 } |
102 if (m_dwCurPos < m_dwSize) { | 102 if (m_dwCurPos < m_dwSize) { |
103 m_dwCurPos++; | 103 m_dwCurPos++; |
104 } | 104 } |
105 return CFX_ByteStringC(pStart, | 105 return CFX_ByteStringC(pStart, |
106 (FX_STRSIZE)(m_dwCurPos - (pStart - m_pData))); | 106 (FX_STRSIZE)(m_dwCurPos - (pStart - m_pData))); |
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132 } | 132 } |
133 return CFX_ByteStringC(pStart, | 133 return CFX_ByteStringC(pStart, |
134 (FX_STRSIZE)(m_dwCurPos - (pStart - m_pData))); | 134 (FX_STRSIZE)(m_dwCurPos - (pStart - m_pData))); |
135 } | 135 } |
136 return CFX_ByteStringC(pStart, dwSize); | 136 return CFX_ByteStringC(pStart, dwSize); |
137 } | 137 } |
138 | 138 |
139 bool CPDF_SimpleParser::FindTagParamFromStart(const CFX_ByteStringC& token, | 139 bool CPDF_SimpleParser::FindTagParamFromStart(const CFX_ByteStringC& token, |
140 int nParams) { | 140 int nParams) { |
141 nParams++; | 141 nParams++; |
142 FX_DWORD* pBuf = FX_Alloc(FX_DWORD, nParams); | 142 uint32_t* pBuf = FX_Alloc(uint32_t, nParams); |
143 int buf_index = 0; | 143 int buf_index = 0; |
144 int buf_count = 0; | 144 int buf_count = 0; |
145 m_dwCurPos = 0; | 145 m_dwCurPos = 0; |
146 while (1) { | 146 while (1) { |
147 pBuf[buf_index++] = m_dwCurPos; | 147 pBuf[buf_index++] = m_dwCurPos; |
148 if (buf_index == nParams) { | 148 if (buf_index == nParams) { |
149 buf_index = 0; | 149 buf_index = 0; |
150 } | 150 } |
151 buf_count++; | 151 buf_count++; |
152 if (buf_count > nParams) { | 152 if (buf_count > nParams) { |
153 buf_count = nParams; | 153 buf_count = nParams; |
154 } | 154 } |
155 CFX_ByteStringC word = GetWord(); | 155 CFX_ByteStringC word = GetWord(); |
156 if (word.IsEmpty()) { | 156 if (word.IsEmpty()) { |
157 FX_Free(pBuf); | 157 FX_Free(pBuf); |
158 return false; | 158 return false; |
159 } | 159 } |
160 if (word == token) { | 160 if (word == token) { |
161 if (buf_count < nParams) { | 161 if (buf_count < nParams) { |
162 continue; | 162 continue; |
163 } | 163 } |
164 m_dwCurPos = pBuf[buf_index]; | 164 m_dwCurPos = pBuf[buf_index]; |
165 FX_Free(pBuf); | 165 FX_Free(pBuf); |
166 return true; | 166 return true; |
167 } | 167 } |
168 } | 168 } |
169 return false; | 169 return false; |
170 } | 170 } |
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