// Protocol Buffers - Google's data interchange format // Copyright 2023 Google LLC. All rights reserved. // https://developers.google.com/protocol-buffers/ // // Redistribution and use in source and binary forms, with or without // modification, are permitted provided that the following conditions are // met: // // * Redistributions of source code must retain the above copyright // notice, this list of conditions and the following disclaimer. // * Redistributions in binary form must reproduce the above // copyright notice, this list of conditions and the following disclaimer // in the documentation and/or other materials provided with the // distribution. // * Neither the name of Google LLC nor the names of its // contributors may be used to endorse or promote products derived from // this software without specific prior written permission. // // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. #include "upb/lex/unicode.h" // Must be last. #include "upb/port/def.inc" int upb_Unicode_ToUTF8(uint32_t cp, char* out) { if (cp <= 0x7f) { out[0] = cp; return 1; } if (cp <= 0x07ff) { out[0] = (cp >> 6) | 0xc0; out[1] = (cp & 0x3f) | 0x80; return 2; } if (cp <= 0xffff) { out[0] = (cp >> 12) | 0xe0; out[1] = ((cp >> 6) & 0x3f) | 0x80; out[2] = (cp & 0x3f) | 0x80; return 3; } if (cp <= 0x10ffff) { out[0] = (cp >> 18) | 0xf0; out[1] = ((cp >> 12) & 0x3f) | 0x80; out[2] = ((cp >> 6) & 0x3f) | 0x80; out[3] = (cp & 0x3f) | 0x80; return 4; } return 0; }