1 /* Convert unibyte character to 32-bit wide character. 2 Copyright (C) 2020-2021 Free Software Foundation, Inc. 3 4 This file is free software: you can redistribute it and/or modify 5 it under the terms of the GNU Lesser General Public License as 6 published by the Free Software Foundation; either version 2.1 of the 7 License, or (at your option) any later version. 8 9 This file is distributed in the hope that it will be useful, 10 but WITHOUT ANY WARRANTY; without even the implied warranty of 11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 12 GNU Lesser General Public License for more details. 13 14 You should have received a copy of the GNU Lesser General Public License 15 along with this program. If not, see <https://www.gnu.org/licenses/>. */ 16 17 /* Written by Bruno Haible <bruno@clisp.org>, 2020. */ 18 19 #include <config.h> 20 21 /* Specification. */ 22 #include <uchar.h> 23 24 #include <stdio.h> 25 #include <string.h> 26 27 wint_t 28 btoc32 (int c) /* */ 29 { 30 #if HAVE_WORKING_MBRTOC32 && !defined __GLIBC__ 31 /* The char32_t encoding of a multibyte character may be different than its 32 wchar_t encoding. */ 33 if (c != EOF) 34 { 35 mbstate_t state; 36 char s[1]; 37 char32_t wc; 38 39 memset (&state, '\0', sizeof (mbstate_t)); 40 s[0] = (unsigned char) c; 41 if (mbrtoc32 (&wc, s, 1, &state) <= 1) 42 return wc; 43 } 44 return WEOF; 45 #else 46 /* In all known locale encodings, unibyte characters correspond only to 47 characters in the BMP. */ 48 return btowc (c); 49 #endif 50 }