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1 // Copyright 2012 the V8 project authors. All rights reserved. | 1 // Copyright 2012 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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7417 // first non-ascii character, rather than directly to the non-ascii character. | 7417 // first non-ascii character, rather than directly to the non-ascii character. |
7418 // If the return value is >= the passed length, the entire string was ASCII. | 7418 // If the return value is >= the passed length, the entire string was ASCII. |
7419 static inline int NonAsciiStart(const char* chars, int length) { | 7419 static inline int NonAsciiStart(const char* chars, int length) { |
7420 const char* start = chars; | 7420 const char* start = chars; |
7421 const char* limit = chars + length; | 7421 const char* limit = chars + length; |
7422 #ifdef V8_HOST_CAN_READ_UNALIGNED | 7422 #ifdef V8_HOST_CAN_READ_UNALIGNED |
7423 ASSERT(kMaxAsciiCharCode == 0x7F); | 7423 ASSERT(kMaxAsciiCharCode == 0x7F); |
7424 const uintptr_t non_ascii_mask = kUintptrAllBitsSet / 0xFF * 0x80; | 7424 const uintptr_t non_ascii_mask = kUintptrAllBitsSet / 0xFF * 0x80; |
7425 while (chars + sizeof(uintptr_t) <= limit) { | 7425 while (chars + sizeof(uintptr_t) <= limit) { |
7426 if (*reinterpret_cast<const uintptr_t*>(chars) & non_ascii_mask) { | 7426 if (*reinterpret_cast<const uintptr_t*>(chars) & non_ascii_mask) { |
7427 return chars - start; | 7427 return static_cast<int>(chars - start); |
7428 } | 7428 } |
7429 chars += sizeof(uintptr_t); | 7429 chars += sizeof(uintptr_t); |
7430 } | 7430 } |
7431 #endif | 7431 #endif |
7432 while (chars < limit) { | 7432 while (chars < limit) { |
7433 if (static_cast<uint8_t>(*chars) > kMaxAsciiCharCodeU) { | 7433 if (static_cast<uint8_t>(*chars) > kMaxAsciiCharCodeU) { |
7434 return chars - start; | 7434 return static_cast<int>(chars - start); |
7435 } | 7435 } |
7436 ++chars; | 7436 ++chars; |
7437 } | 7437 } |
7438 return chars - start; | 7438 return static_cast<int>(chars - start); |
7439 } | 7439 } |
7440 | 7440 |
7441 static inline bool IsAscii(const char* chars, int length) { | 7441 static inline bool IsAscii(const char* chars, int length) { |
7442 return NonAsciiStart(chars, length) >= length; | 7442 return NonAsciiStart(chars, length) >= length; |
7443 } | 7443 } |
7444 | 7444 |
7445 static inline int NonAsciiStart(const uc16* chars, int length) { | 7445 static inline int NonAsciiStart(const uc16* chars, int length) { |
7446 const uc16* limit = chars + length; | 7446 const uc16* limit = chars + length; |
7447 const uc16* start = chars; | 7447 const uc16* start = chars; |
7448 while (chars < limit) { | 7448 while (chars < limit) { |
7449 if (*chars > kMaxAsciiCharCodeU) return chars - start; | 7449 if (*chars > kMaxAsciiCharCodeU) return static_cast<int>(chars - start); |
7450 ++chars; | 7450 ++chars; |
7451 } | 7451 } |
7452 return chars - start; | 7452 return static_cast<int>(chars - start); |
7453 } | 7453 } |
7454 | 7454 |
7455 static inline bool IsAscii(const uc16* chars, int length) { | 7455 static inline bool IsAscii(const uc16* chars, int length) { |
7456 return NonAsciiStart(chars, length) >= length; | 7456 return NonAsciiStart(chars, length) >= length; |
7457 } | 7457 } |
7458 | 7458 |
7459 protected: | 7459 protected: |
7460 class ReadBlockBuffer { | 7460 class ReadBlockBuffer { |
7461 public: | 7461 public: |
7462 ReadBlockBuffer(unibrow::byte* util_buffer_, | 7462 ReadBlockBuffer(unibrow::byte* util_buffer_, |
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8953 } else { | 8953 } else { |
8954 value &= ~(1 << bit_position); | 8954 value &= ~(1 << bit_position); |
8955 } | 8955 } |
8956 return value; | 8956 return value; |
8957 } | 8957 } |
8958 }; | 8958 }; |
8959 | 8959 |
8960 } } // namespace v8::internal | 8960 } } // namespace v8::internal |
8961 | 8961 |
8962 #endif // V8_OBJECTS_H_ | 8962 #endif // V8_OBJECTS_H_ |
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