contrib/less/charset.h

   1 /*
   2  * Copyright (C) 2005-2008  Mark Nudelman
   3  *
   4  * You may distribute under the terms of either the GNU General Public
   5  * License or the Less License, as specified in the README file.
   6  *
   7  * For more information about less, or for information on how to
   8  * contact the author, see the README file.
   9  */
  10
  11 #define IS_ASCII_OCTET(c)   (((c) & 0x80) == 0)
  12 #define IS_UTF8_TRAIL(c)    (((c) & 0xC0) == 0x80)
  13 #define IS_UTF8_LEAD2(c)    (((c) & 0xE0) == 0xC0)
  14 #define IS_UTF8_LEAD3(c)    (((c) & 0xF0) == 0xE0)
  15 #define IS_UTF8_LEAD4(c)    (((c) & 0xF8) == 0xF0)
  16 #define IS_UTF8_LEAD5(c)    (((c) & 0xFC) == 0xF8)
  17 #define IS_UTF8_LEAD6(c)    (((c) & 0xFE) == 0xFC)
  18 #define IS_UTF8_INVALID(c)  (((c) & 0xFE) == 0xFE)
  19 #define IS_UTF8_LEAD(c)     (((c) & 0xC0) == 0xC0 && !IS_UTF8_INVALID(c))