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1 // Copyright 2013 the V8 project authors. All rights reserved. | 1 // Copyright 2013 the V8 project authors. All rights reserved. |
2 // Redistribution and use in source and binary forms, with or without | 2 // Redistribution and use in source and binary forms, with or without |
3 // modification, are permitted provided that the following conditions are | 3 // modification, are permitted provided that the following conditions are |
4 // met: | 4 // met: |
5 // | 5 // |
6 // * Redistributions of source code must retain the above copyright | 6 // * Redistributions of source code must retain the above copyright |
7 // notice, this list of conditions and the following disclaimer. | 7 // notice, this list of conditions and the following disclaimer. |
8 // * Redistributions in binary form must reproduce the above | 8 // * Redistributions in binary form must reproduce the above |
9 // copyright notice, this list of conditions and the following | 9 // copyright notice, this list of conditions and the following |
10 // disclaimer in the documentation and/or other materials provided | 10 // disclaimer in the documentation and/or other materials provided |
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120 i += step; | 120 i += step; |
121 } | 121 } |
122 } | 122 } |
123 | 123 |
124 ASSERT(start_index < length); | 124 ASSERT(start_index < length); |
125 Handle<String> first_part = | 125 Handle<String> first_part = |
126 isolate->factory()->NewProperSubString(string, 0, start_index); | 126 isolate->factory()->NewProperSubString(string, 0, start_index); |
127 | 127 |
128 int dest_position = 0; | 128 int dest_position = 0; |
129 Handle<String> second_part; | 129 Handle<String> second_part; |
130 ASSERT(unescaped_length <= String::kMaxLength); | |
131 if (one_byte) { | 130 if (one_byte) { |
132 Handle<SeqOneByteString> dest = | 131 Handle<SeqOneByteString> dest = |
133 isolate->factory()->NewRawOneByteString(unescaped_length); | 132 isolate->factory()->NewRawOneByteString(unescaped_length); |
134 ASSERT(!dest.is_null()); | |
135 DisallowHeapAllocation no_allocation; | 133 DisallowHeapAllocation no_allocation; |
136 Vector<const Char> vector = GetCharVector<Char>(string); | 134 Vector<const Char> vector = GetCharVector<Char>(string); |
137 for (int i = start_index; i < length; dest_position++) { | 135 for (int i = start_index; i < length; dest_position++) { |
138 int step; | 136 int step; |
139 dest->SeqOneByteStringSet(dest_position, | 137 dest->SeqOneByteStringSet(dest_position, |
140 UnescapeChar(vector, i, length, &step)); | 138 UnescapeChar(vector, i, length, &step)); |
141 i += step; | 139 i += step; |
142 } | 140 } |
143 second_part = dest; | 141 second_part = dest; |
144 } else { | 142 } else { |
145 Handle<SeqTwoByteString> dest = | 143 Handle<SeqTwoByteString> dest = |
146 isolate->factory()->NewRawTwoByteString(unescaped_length); | 144 isolate->factory()->NewRawTwoByteString(unescaped_length); |
147 ASSERT(!dest.is_null()); | |
148 DisallowHeapAllocation no_allocation; | 145 DisallowHeapAllocation no_allocation; |
149 Vector<const Char> vector = GetCharVector<Char>(string); | 146 Vector<const Char> vector = GetCharVector<Char>(string); |
150 for (int i = start_index; i < length; dest_position++) { | 147 for (int i = start_index; i < length; dest_position++) { |
151 int step; | 148 int step; |
152 dest->SeqTwoByteStringSet(dest_position, | 149 dest->SeqTwoByteStringSet(dest_position, |
153 UnescapeChar(vector, i, length, &step)); | 150 UnescapeChar(vector, i, length, &step)); |
154 i += step; | 151 i += step; |
155 } | 152 } |
156 second_part = dest; | 153 second_part = dest; |
157 } | 154 } |
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259 if (c >= 256) { | 256 if (c >= 256) { |
260 escaped_length += 6; | 257 escaped_length += 6; |
261 } else if (IsNotEscaped(c)) { | 258 } else if (IsNotEscaped(c)) { |
262 escaped_length++; | 259 escaped_length++; |
263 } else { | 260 } else { |
264 escaped_length += 3; | 261 escaped_length += 3; |
265 } | 262 } |
266 | 263 |
267 // We don't allow strings that are longer than a maximal length. | 264 // We don't allow strings that are longer than a maximal length. |
268 ASSERT(String::kMaxLength < 0x7fffffff - 6); // Cannot overflow. | 265 ASSERT(String::kMaxLength < 0x7fffffff - 6); // Cannot overflow. |
269 if (escaped_length > String::kMaxLength) break; // Provoke exception. | 266 if (escaped_length > String::kMaxLength) { |
| 267 AllowHeapAllocation allocate_error_and_return; |
| 268 isolate->ThrowInvalidStringLength(); |
| 269 return Handle<String>::null(); |
| 270 } |
270 } | 271 } |
271 } | 272 } |
272 | 273 |
273 // No length change implies no change. Return original string if no change. | 274 // No length change implies no change. Return original string if no change. |
274 if (escaped_length == length) return string; | 275 if (escaped_length == length) return string; |
275 | 276 |
276 Handle<SeqOneByteString> dest = | 277 Handle<SeqOneByteString> dest = |
277 isolate->factory()->NewRawOneByteString(escaped_length); | 278 isolate->factory()->NewRawOneByteString(escaped_length); |
278 RETURN_IF_EMPTY_HANDLE_VALUE(isolate, dest, Handle<String>()); | |
279 int dest_position = 0; | 279 int dest_position = 0; |
280 | 280 |
281 { DisallowHeapAllocation no_allocation; | 281 { DisallowHeapAllocation no_allocation; |
282 Vector<const Char> vector = GetCharVector<Char>(string); | 282 Vector<const Char> vector = GetCharVector<Char>(string); |
283 for (int i = 0; i < length; i++) { | 283 for (int i = 0; i < length; i++) { |
284 uint16_t c = vector[i]; | 284 uint16_t c = vector[i]; |
285 if (c >= 256) { | 285 if (c >= 256) { |
286 dest->SeqOneByteStringSet(dest_position, '%'); | 286 dest->SeqOneByteStringSet(dest_position, '%'); |
287 dest->SeqOneByteStringSet(dest_position+1, 'u'); | 287 dest->SeqOneByteStringSet(dest_position+1, 'u'); |
288 dest->SeqOneByteStringSet(dest_position+2, kHexChars[c >> 12]); | 288 dest->SeqOneByteStringSet(dest_position+2, kHexChars[c >> 12]); |
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301 } | 301 } |
302 } | 302 } |
303 } | 303 } |
304 | 304 |
305 return dest; | 305 return dest; |
306 } | 306 } |
307 | 307 |
308 } } // namespace v8::internal | 308 } } // namespace v8::internal |
309 | 309 |
310 #endif // V8_URI_H_ | 310 #endif // V8_URI_H_ |
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