parser.h

PWM产生程序

/*
 * libtu/parser.h
 *
 * Copyright (c) Tuomo Valkonen 1999-2002. 
 *
 * You may distribute and modify this library under the terms of either
 * the Clarified Artistic License or the GNU LGPL, version 2.1 or later.
 */

#ifndef LIBTU_PARSER_H
#define LIBTU_PARSER_H

#include "tokenizer.h"

/*
 * format:
 * 	l = long
 *	d = double
 * 	i = identifier
 * 	s = string
 * 	c = char
 *  . = 1 times any     ("l.d")
 *  * = 0 or more times any (must be the last, "sd*")
 * 	? = optional		("?c")
 * 	: = conditional		(":c:s")
 *  + = 1 or more times last (most be the last, "l+")
 * special entries:
 * 
 * "#end" 		call this handler at the end of section.
 * "#cancel" 	call this handler when recovering from error
 */

#define END_CONFOPTS {NULL, NULL, NULL, NULL}

typedef struct _ConfOpt{
	const char *optname;
	const char *argfmt;
	bool (*fn)(Tokenizer *tokz, int n, Token *toks);
	struct _ConfOpt *opts;
} ConfOpt;

#define CONFOPTS_NOT_SET libtu_dummy_confopts
extern ConfOpt libtu_dummy_confopts[];

extern bool parse_config_tokz(Tokenizer *tokz, const ConfOpt *options);
extern bool parse_config_tokz_skip_section(Tokenizer *tokz);
extern bool parse_config(const char *fname, const ConfOpt *options, int flags);
extern bool parse_config_file(FILE *file, const ConfOpt *options, int flags);
extern bool check_args(const Tokenizer *tokz, Token *tokens, int ntokens,
					   const char *fmt);
extern bool check_args_loose(const Tokenizer *tokz, Token *tokens, int ntokens,
							 const char *fmt);

#endif /* LIBTU_PARSER_H */