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1 // Copyright (c) 2006-2008 The Chromium Authors. All rights reserved. | 1 // Copyright (c) 2006-2008 The Chromium 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 #include "base/json/string_escape.h" | 5 #include "base/json/string_escape.h" |
6 | 6 |
7 #include <stddef.h> | 7 #include <stddef.h> |
8 #include <stdint.h> | 8 #include <stdint.h> |
9 | 9 |
10 #include <limits> | 10 #include <limits> |
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84 if (put_in_quotes) | 84 if (put_in_quotes) |
85 dest->push_back('"'); | 85 dest->push_back('"'); |
86 | 86 |
87 // Casting is necessary because ICU uses int32_t. Try and do so safely. | 87 // Casting is necessary because ICU uses int32_t. Try and do so safely. |
88 CHECK_LE(str.length(), | 88 CHECK_LE(str.length(), |
89 static_cast<size_t>(std::numeric_limits<int32_t>::max())); | 89 static_cast<size_t>(std::numeric_limits<int32_t>::max())); |
90 const int32_t length = static_cast<int32_t>(str.length()); | 90 const int32_t length = static_cast<int32_t>(str.length()); |
91 | 91 |
92 for (int32_t i = 0; i < length; ++i) { | 92 for (int32_t i = 0; i < length; ++i) { |
93 uint32_t code_point; | 93 uint32_t code_point; |
94 if (!ReadUnicodeCharacter(str.data(), length, &i, &code_point)) { | 94 if (!ReadUnicodeCharacter(str.data(), length, &i, &code_point) || |
| 95 code_point == static_cast<decltype(code_point)>(CBU_SENTINEL) || |
| 96 !IsValidCharacter(code_point)) { |
95 code_point = kReplacementCodePoint; | 97 code_point = kReplacementCodePoint; |
96 did_replacement = true; | 98 did_replacement = true; |
97 } | 99 } |
98 | 100 |
99 if (EscapeSpecialCodePoint(code_point, dest)) | 101 if (EscapeSpecialCodePoint(code_point, dest)) |
100 continue; | 102 continue; |
101 | 103 |
102 // Escape non-printing characters. | 104 // Escape non-printing characters. |
103 if (code_point < 32) | 105 if (code_point < 32) |
104 base::StringAppendF(dest, kU16EscapeFormat, code_point); | 106 base::StringAppendF(dest, kU16EscapeFormat, code_point); |
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158 dest.push_back(*it); | 160 dest.push_back(*it); |
159 } | 161 } |
160 | 162 |
161 if (put_in_quotes) | 163 if (put_in_quotes) |
162 dest.push_back('"'); | 164 dest.push_back('"'); |
163 | 165 |
164 return dest; | 166 return dest; |
165 } | 167 } |
166 | 168 |
167 } // namespace base | 169 } // namespace base |
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