1/* Copyright (C) 2008 Denys Vlasenko <vda.linux@googlemail.com> 2 * 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. 7 */ 8 9#ifndef _BITS_UCLIBC_CHARCLASS_H 10#define _BITS_UCLIBC_CHARCLASS_H 11 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.*/ 22enum { 23 __CTYPE_unclassified = 0, 24 __CTYPE_alpha_nonupper_nonlower, 25 __CTYPE_alpha_lower, 26 __CTYPE_alpha_upper_lower, 27 __CTYPE_alpha_upper, 28 __CTYPE_digit, 29 __CTYPE_punct, 30 __CTYPE_graph, 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 38}; 39 40#endif 41