[calc.git] / parser.h

#ifndef __PARSER_H__
#define __PARSER_H__

/* function type */

typedef enum {
    Val = 0,
    Add, Sub,
    Mul, Div, Mod,
    Pow, Sqr,
    Cos, Sin, Atn,
    Log, Exp
} 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);

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