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/*
*
* This library is free software; you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2.1 of the
* License, or (at your option) any later version. This library is
* distributed in the hope that it will be useful, but WITHOUT ANY
* WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE.
* See the GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this library; if not, write to the Free Software Foundation,
* Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#ifndef _SP_LEXIS_H_
#define _SP_LEXIS_H_
#include "sys_string.h"
#include "sys_ctype.h"
/** @file
* Lexical analysis.
*/
/** Class of characters treated as space. */
#define space_class ((char []){ '\n', '\r', '\t', ' ', '\f' , 0 })
/** Class of separator characters. */
#define sep_class "{}()<>[]@!;"
#define comment_class "#"
/** Determine if a character is in a given class.
*
* @param c character to test
* @param s null-terminated string of characters in the class
* @return 1 if c is in the class, 0 otherwise.
*/
static inline int in_class(int c, const char *s){
return s && (strchr(s, c) != 0);
}
/** Determine if a character is in the space class.
*
* @param c character to test
* @return 1 if c is in the class, 0 otherwise.
*/
static inline int in_space_class(int c){
return in_class(c, space_class);
}
static inline int in_comment_class(int c){
return in_class(c, comment_class);
}
/** Determine if a character is in the separator class.
* Separator characters terminate tokens, and do not need space
* to separate them.
*
* @param c character to test
* @return 1 if c is in the class, 0 otherwise.
*/
static inline int in_sep_class(int c){
return in_class(c, sep_class);
}
/** Determine if a character is in the alpha class.
*
* @param c character to test
* @return 1 if c is in the class, 0 otherwise.
*/
static inline int in_alpha_class(int c){
return isalpha(c);
}
/** Determine if a character is in the octal digit class.
*
* @param c character to test
* @return 1 if c is in the class, 0 otherwise.
*/
static inline int in_octal_digit_class(int c){
return '0' <= c && c <= '7';
}
/** Determine if a character is in the decimal digit class.
*
* @param c character to test
* @return 1 if c is in the class, 0 otherwise.
*/
static inline int in_decimal_digit_class(int c){
return isdigit(c);
}
/** Determine if a character is in the hex digit class.
*
* @param c character to test
* @return 1 if c is in the class, 0 otherwise.
*/
static inline int in_hex_digit_class(int c){
return isdigit(c) || in_class(c, "abcdefABCDEF");
}
static inline int in_string_quote_class(int c){
return in_class(c, "'\"");
}
static inline int in_printable_class(int c){
return ('A' <= c && c <= 'Z')
|| ('a' <= c && c <= 'z')
|| ('0' <= c && c <= '9')
|| in_class(c, "!$%&*+,-./:;<=>?@^_`{|}~");
}
extern int is_decimal_number(const char *s, int n);
extern int is_hex_number(const char *s, int n);
extern int is_keyword(const char *s, const char *k);
extern int is_keychar(const char *s, char c);
#endif /* !_SP_LEXIS_H_ */
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