Protocol Buffers - Google's data interchange format (grpc依赖)
https://developers.google.com/protocol-buffers/
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37 lines
909 B
37 lines
909 B
// Protocol Buffers - Google's data interchange format |
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// Copyright 2023 Google LLC. All rights reserved. |
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// |
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// Use of this source code is governed by a BSD-style |
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// license that can be found in the LICENSE file or at |
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// https://developers.google.com/open-source/licenses/bsd |
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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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