ali@475: /*
ali@475:  * Copyright (C) 2016  J. Ali Harlow <ali@juiblex.co.uk>
ali@475:  *
ali@475:  * This program is free software; you can redistribute it and/or modify
ali@475:  * it under the terms of the GNU General Public License as published by
ali@475:  * the Free Software Foundation; either version 2 of the License, or
ali@475:  * (at your option) any later version.
ali@475:  *
ali@475:  * This program is distributed in the hope that it will be useful,
ali@475:  * but WITHOUT ANY WARRANTY; without even the implied warranty of
ali@475:  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
ali@475:  * GNU General Public License for more details.
ali@475:  *
ali@475:  * You should have received a copy of the GNU General Public License along
ali@475:  * with this program; if not, write to the Free Software Foundation, Inc.,
ali@475:  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
ali@475:  */
ali@475: 
ali@475: #define is_alpha(c)	  ((c) >= 'a' && (c) <= 'z' || (c) >= 'A' && (c) <= 'Z')
ali@475: 
ali@475: #define is_alnum(c)	  (is_alpha(c) || (c) >= '0' && (c) <= '9')
ali@475: 
ali@475: #define is_xdigit(c)	  ((c) >= '0' && (c) <= '9' || \
ali@475: 			   (c) >= 'a' && (c) <= 'f' || \
ali@475: 			   (c) >= 'A' && (c) <= 'F')
ali@475: 
ali@475: #define is_unreserved(c)  (is_alnum(c) || (c) == '-' || (c) == '.' || \
ali@475: 			   (c) == '_' || (c) == '~')
ali@475: 
ali@475: #define is_sub_delim(c)	  strchr("!$&'()*+,;=", c)
ali@475: 
ali@475: #define is_pchar(c)	  (is_unreserved(c) || (c) == '%' || \
ali@475: 			   is_sub_delim(c) || (c) == ':' || (c) == '@')
ali@475: 
ali@475: #define xdigit_value(c)	  ((c) >= '0' && (c) <= '9' ? (c) - '0' : \
ali@475: 			   (c) >= 'a' && (c) <= 'f' ? (c) - 'a' + 10 : \
ali@475: 			   (c) >= 'A' && (c) <= 'F' ? (c) - 'A' + 10 : -1)
ali@475: 
ali@475: #define pchar_get_char(p) ((p)[0] == '%' ? \
ali@475: 			   xdigit_value((p)[1]) * 16 + xdigit_value((p)[2]) : \
ali@475: 			   (p)[0])
ali@475: 
ali@475: #define pchar_next_char(p) \
ali@475: 	    do { \
ali@475: 		    if ((p)[0] == '%') \
ali@475: 			    (p) += 3; \
ali@475: 		    else \
ali@475: 			    (p)++; \
ali@475: 	    } while(0)
ali@475: