Protocol Buffers - Google's data interchange format (grpc依赖)
https://developers.google.com/protocol-buffers/
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60 lines
2.2 KiB
60 lines
2.2 KiB
// Protocol Buffers - Google's data interchange format |
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// Copyright 2023 Google LLC. All rights reserved. |
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// https://developers.google.com/protocol-buffers/ |
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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 |
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// met: |
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// |
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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 |
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// copyright notice, this list of conditions and the following disclaimer |
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// in the documentation and/or other materials provided with the |
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// distribution. |
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// * Neither the name of Google LLC nor the names of its |
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// contributors may be used to endorse or promote products derived from |
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// 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 |
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// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
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// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
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// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
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// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
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// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
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// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
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// 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 |
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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#include "upb/lex/unicode.h" |
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// Must be last. |
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#include "upb/port/def.inc" |
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int upb_Unicode_ToUTF8(uint32_t cp, char* out) { |
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if (cp <= 0x7f) { |
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out[0] = cp; |
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return 1; |
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} |
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if (cp <= 0x07ff) { |
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out[0] = (cp >> 6) | 0xc0; |
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out[1] = (cp & 0x3f) | 0x80; |
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return 2; |
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} |
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if (cp <= 0xffff) { |
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out[0] = (cp >> 12) | 0xe0; |
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out[1] = ((cp >> 6) & 0x3f) | 0x80; |
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out[2] = (cp & 0x3f) | 0x80; |
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return 3; |
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} |
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if (cp <= 0x10ffff) { |
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out[0] = (cp >> 18) | 0xf0; |
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out[1] = ((cp >> 12) & 0x3f) | 0x80; |
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out[2] = ((cp >> 6) & 0x3f) | 0x80; |
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out[3] = (cp & 0x3f) | 0x80; |
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return 4; |
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} |
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return 0; |
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}
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