charset.h revision 161475
1161475Sdelphij/* 2161475Sdelphij * Copyright (C) 2005 Mark Nudelman 3161475Sdelphij * 4161475Sdelphij * You may distribute under the terms of either the GNU General Public 5161475Sdelphij * License or the Less License, as specified in the README file. 6161475Sdelphij * 7161475Sdelphij * For more information about less, or for information on how to 8161475Sdelphij * contact the author, see the README file. 9161475Sdelphij */ 10161475Sdelphij 11161475Sdelphij#define IS_ASCII_OCTET(c) (((c) & 0x80) == 0) 12161475Sdelphij#define IS_UTF8_TRAIL(c) (((c) & 0xC0) == 0x80) 13161475Sdelphij#define IS_UTF8_LEAD2(c) (((c) & 0xE0) == 0xC0) 14161475Sdelphij#define IS_UTF8_LEAD3(c) (((c) & 0xF0) == 0xE0) 15161475Sdelphij#define IS_UTF8_LEAD4(c) (((c) & 0xF8) == 0xF0) 16161475Sdelphij#define IS_UTF8_LEAD5(c) (((c) & 0xFC) == 0xF8) 17161475Sdelphij#define IS_UTF8_LEAD6(c) (((c) & 0xFE) == 0xFC) 18161475Sdelphij#define IS_UTF8_INVALID(c) (((c) & 0xFE) == 0xFE) 19161475Sdelphij#define IS_UTF8_LEAD(c) (((c) & 0xC0) == 0xC0 && !IS_UTF8_INVALID(c)) 20