Protocol Buffers - Google's data interchange format (grpc依赖)
https://developers.google.com/protocol-buffers/
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58 lines
2.1 KiB
58 lines
2.1 KiB
2 years ago
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/*
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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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#include "upb/internal/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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