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      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