Protocol Buffers - Google's data interchange format (grpc依赖)
https://developers.google.com/protocol-buffers/
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77 lines
2.9 KiB
77 lines
2.9 KiB
/* |
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* Copyright (c) 2009-2021, Google LLC |
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* All rights reserved. |
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* |
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* Redistribution and use in source and binary forms, with or without |
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* modification, are permitted provided that the following conditions are met: |
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* * Redistributions of source code must retain the above copyright |
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* notice, this list of conditions and the following disclaimer. |
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* * Redistributions in binary form must reproduce the above copyright |
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* notice, this list of conditions and the following disclaimer in the |
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* documentation and/or other materials provided with the distribution. |
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* * Neither the name of Google LLC nor the |
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* names of its contributors may be used to endorse or promote products |
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* derived from this software without specific prior written permission. |
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* |
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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* ARE DISCLAIMED. IN NO EVENT SHALL Google LLC BE LIABLE FOR ANY DIRECT, |
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* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES |
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; |
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND |
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* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS |
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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*/ |
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#ifndef UPB_LEX_UNICODE_H_ |
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#define UPB_LEX_UNICODE_H_ |
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// Must be last. |
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#include "upb/port/def.inc" |
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#ifdef __cplusplus |
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extern "C" { |
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#endif |
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// Returns true iff a codepoint is the value for a high surrogate. |
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UPB_INLINE bool upb_Unicode_IsHigh(uint32_t cp) { |
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return (cp >= 0xd800 && cp <= 0xdbff); |
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} |
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// Returns true iff a codepoint is the value for a low surrogate. |
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UPB_INLINE bool upb_Unicode_IsLow(uint32_t cp) { |
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return (cp >= 0xdc00 && cp <= 0xdfff); |
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} |
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// Returns the high 16-bit surrogate value for a supplementary codepoint. |
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// Does not sanity-check the input. |
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UPB_INLINE uint16_t upb_Unicode_ToHigh(uint32_t cp) { |
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return (cp >> 10) + 0xd7c0; |
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} |
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// Returns the low 16-bit surrogate value for a supplementary codepoint. |
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// Does not sanity-check the input. |
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UPB_INLINE uint16_t upb_Unicode_ToLow(uint32_t cp) { |
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return (cp & 0x3ff) | 0xdc00; |
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} |
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// Returns the 32-bit value corresponding to a pair of 16-bit surrogates. |
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// Does not sanity-check the input. |
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UPB_INLINE uint32_t upb_Unicode_FromPair(uint32_t high, uint32_t low) { |
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return ((high & 0x3ff) << 10) + (low & 0x3ff) + 0x10000; |
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} |
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// Outputs a codepoint as UTF8. |
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// Returns the number of bytes written (1-4 on success, 0 on error). |
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// Does not sanity-check the input. Specifically does not check for surrogates. |
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int upb_Unicode_ToUTF8(uint32_t cp, char* out); |
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#ifdef __cplusplus |
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} /* extern "C" */ |
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#endif |
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#include "upb/port/undef.inc" |
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#endif /* UPB_LEX_UNICODE_H_ */
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