1 /* Copyright (C) 2008 Denys Vlasenko <vda.linux@googlemail.com>
3 * This library is free software; you can redistribute it and/or
4 * modify it under the terms of the GNU Lesser General Public
5 * License as published by the Free Software Foundation; either
6 * version 2.1 of the License, or (at your option) any later version.
9 #ifndef _BITS_UCLIBC_CHARCLASS_H
10 #define _BITS_UCLIBC_CHARCLASS_H
12 /* Taking advantage of the C99 mutual-exclusion guarantees for the various
13 * (w)ctype classes, including the descriptions of printing and control
14 * (w)chars, we can place each in one of the following mutually-exlusive
15 * subsets. Since there are less than 16, we can store the data for
16 * each (w)chars in a nibble. In contrast, glibc uses an unsigned int
17 * per (w)char, with one bit flag for each is* type. While this allows
18 * a simple '&' operation to determine the type vs. a range test and a
19 * little special handling for the "blank" and "xdigit" types in my
20 * approach, it also uses 8 times the space for the tables on the typical
21 * 32-bit archs we supported.*/
23 __CTYPE_unclassified = 0,
24 __CTYPE_alpha_nonupper_nonlower,
26 __CTYPE_alpha_upper_lower,
31 __CTYPE_print_space_nonblank,
32 __CTYPE_print_space_blank,
33 __CTYPE_space_nonblank_noncntrl,
34 __CTYPE_space_blank_noncntrl,
35 __CTYPE_cntrl_space_nonblank,
36 __CTYPE_cntrl_space_blank,
37 __CTYPE_cntrl_nonspace