[calc.git] / parser.h

#ifndef __PARSER_H__
#define __PARSER_H__

/* function type */

typedef enum {
    Val = 0, Sig,
    Add, Sub,
    Mul, Div, Mod,
    Pow, Sqr,
    Cos, Sin, Atn,
    Log, Exp,
    Qui, Hel
} 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];
    float value;
    int prio;
} element_t;

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

/* parser function */

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
bc97a989 LM	1	#ifndef __PARSER_H__
	2	#define __PARSER_H__
	3
	4	/* function type */
	5
	6	typedef enum {
89cf0955	7	Val = 0, Sig,
bc97a989	8	Add, Sub,
c47a9298 LM	9	Mul, Div, Mod,
c47a9298 LM	10	Pow, Sqr,
bc97a989	11	Cos, Sin, Atn,
3b4b0bbe	12	Log, Exp,
89cf0955	13	Qui, Hel
bc97a989 LM	14	} func_t;
	15
	16	/* keyword type */
	17
	18	typedef struct _keyword_t {
	19	char *keyword;
	20	func_t func;
	21	int nbops;
	22	int offset;
11cda8d7	23	int prio;
bc97a989 LM	24	} keyword_t;
	25
	26	/* calculus element type */
	27
0b489a77	28	#define MAX_OPERANDS 10
bc97a989 LM	29	typedef struct _element_t {
	30	func_t func;
	31	int nbops;
	32	struct _element_t *ops[MAX_OPERANDS];
	33	float value;
11cda8d7	34	int prio;
bc97a989 LM	35	} element_t;
bc97a989 LM	36
0b489a77 LM	37	#define ERROR_OP ((element_t *)(-1))
0b489a77 LM	38
bc97a989 LM	39	/* parser function */
bc97a989 LM	40
ef37d966	41	element_t parser (char str, char **next, int prio);
bc97a989 LM	42
	43	void print_element (element_t *root, int level);
	44
3b4b0bbe	45	double evaluate_element (element_t *root, char mask);
f2927108	46
bc97a989 LM	47	#endif /* __PARSER_H__ */
	48
	49	/* vim: set ts=4 sw=4 et: */