1 /* locale information 2 3 Copyright 2016-2020 Free Software Foundation, Inc. 4 5 This program is free software; you can redistribute it and/or modify 6 it under the terms of the GNU General Public License as published by 7 the Free Software Foundation; either version 3, or (at your option) 8 any later version. 9 10 This program is distributed in the hope that it will be useful, 11 but WITHOUT ANY WARRANTY; without even the implied warranty of 12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 13 GNU General Public License for more details. 14 15 You should have received a copy of the GNU General Public License 16 along with this program; if not, write to the Free Software 17 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA 18 02110-1301, USA. */ 19 20 /* Written by Paul Eggert. */ 21 22 #include <limits.h> 23 #include <stdbool.h> 24 #include <wchar.h> 25 26 struct localeinfo 27 { 28 /* MB_CUR_MAX > 1. */ 29 bool multibyte; 30 31 /* The locale is simple, like the C locale. These locales can be 32 processed more efficiently, as they are single-byte, their native 33 character set is in collating-sequence order, and they do not 34 have multi-character collating elements. */ 35 bool simple; 36 37 /* The locale uses UTF-8. */ 38 bool using_utf8; 39 40 /* An array indexed by byte values B that contains 1 if B is a 41 single-byte character, -1 if B is an encoding error, and -2 if B 42 is the leading byte of a multibyte character that contains more 43 than one byte. */ 44 signed char sbclen[UCHAR_MAX + 1]; 45 46 /* An array indexed by byte values B that contains the corresponding 47 wide character (if any) for B if sbclen[B] == 1. WEOF means the 48 byte is not a valid single-byte character, i.e., sbclen[B] == -1 49 or -2. */ 50 wint_t sbctowc[UCHAR_MAX + 1]; 51 }; 52 53 extern void init_localeinfo (struct localeinfo *); 54 55 /* Maximum number of characters that can be the case-folded 56 counterparts of a single character, not counting the character 57 itself. This is a generous upper bound. */ 58 enum { CASE_FOLDED_BUFSIZE = 32 }; 59 60 extern int case_folded_counterparts (wint_t, wchar_t[CASE_FOLDED_BUFSIZE]); 61