[calc.git] / parser.h

#ifndef __PARSER_H__
#define __PARSER_H__

/* global variables */

extern double answer;

/* function type */

typedef enum {
    Val = 0, Sig,
    Add, Sub,
    Mul, Div, Mod,
    Pow, Sqr,
    Cos, Sin, Atan,
    Log, Exp,
    Store, Recall, Disp,
    Quit, Help,
    Ans, E, Pi,
    Equal, Diff, Ge, Le, Gt, Lt
} func_t;

/* keyword type */

typedef struct _keyword_t {
    char *keyword;
    func_t func;
    int nbops;
    int offset;
    int prio;
} keyword_t;

/* calculus element type */

#define MAX_OPERANDS 10
typedef struct _element_t {
    func_t func;
    int nbops;
    struct _element_t *ops[MAX_OPERANDS];
    double value;
    int prio;
} element_t;

#define ERROR_OP ((element_t *)(-1))

/* parser function */

void delelement (element_t *root);

element_t *parser (char *str, char **next, int prio);

void print_element (element_t *root, int level);

double evaluate_element (element_t *root, char mask);

#endif /* __PARSER_H__ */

/* vim: set ts=4 sw=4 et: */
Commit	Line	Data
	1	#ifndef __PARSER_H__
	2	#define __PARSER_H__
	3
	4	/* global variables */
	5
	6	extern double answer;
	7
	8	/* function type */
	9
	10	typedef enum {
	11	Val = 0, Sig,
	12	Add, Sub,
	13	Mul, Div, Mod,
	14	Pow, Sqr,
	15	Cos, Sin, Atan,
	16	Log, Exp,
	17	Store, Recall, Disp,
	18	Quit, Help,
	19	Ans, E, Pi,
	20	Equal, Diff, Ge, Le, Gt, Lt
	21	} func_t;
	22
	23	/* keyword type */
	24
	25	typedef struct _keyword_t {
	26	char *keyword;
	27	func_t func;
	28	int nbops;
	29	int offset;
	30	int prio;
	31	} keyword_t;
	32
	33	/* calculus element type */
	34
	35	#define MAX_OPERANDS 10
	36	typedef struct _element_t {
	37	func_t func;
	38	int nbops;
	39	struct _element_t *ops[MAX_OPERANDS];
	40	double value;
	41	int prio;
	42	} element_t;
	43
	44	#define ERROR_OP ((element_t *)(-1))
	45
	46	/* parser function */
	47
	48	void delelement (element_t *root);
	49
	50	element_t parser (char str, char **next, int prio);
	51
	52	void print_element (element_t *root, int level);
	53
	54	double evaluate_element (element_t *root, char mask);
	55
	56	#endif /* __PARSER_H__ */
	57
	58	/* vim: set ts=4 sw=4 et: */