1 /* $NetBSD: charset.h,v 1.4 2023/10/06 05:49:49 simonb Exp $ */ 2 3 /* 4 * Copyright (C) 1984-2023 Mark Nudelman 5 * 6 * You may distribute under the terms of either the GNU General Public 7 * License or the Less License, as specified in the README file. 8 * 9 * For more information, see the README file. 10 */ 11 12 #define IS_ASCII_OCTET(c) (((c) & 0x80) == 0) 13 #define IS_UTF8_TRAIL(c) (((c) & 0xC0) == 0x80) 14 #define IS_UTF8_LEAD2(c) (((c) & 0xE0) == 0xC0) 15 #define IS_UTF8_LEAD3(c) (((c) & 0xF0) == 0xE0) 16 #define IS_UTF8_LEAD4(c) (((c) & 0xF8) == 0xF0) 17 #define IS_UTF8_LEAD5(c) (((c) & 0xFC) == 0xF8) 18 #define IS_UTF8_LEAD6(c) (((c) & 0xFE) == 0xFC) 19 #define IS_UTF8_INVALID(c) (((c) & 0xFE) == 0xFE) 20 #define IS_UTF8_LEAD(c) (((c) & 0xC0) == 0xC0 && !IS_UTF8_INVALID(c)) 21