fix bracket evaluation

[calc.git] / element.h

#ifndef __ELEMENT_H__
#define __ELEMENT_H__

/* function type */

typedef enum {
    Val = 0, Id, Sig,
    Add, Sub,
    Mul, Div, Mod,
    Pow, Sqr,
    Cos, Sin, Tan, Acos, Asin, Atan,
    Ln, Log, Exp,
    Erfc, Erf,
    Abs, Ceil, Floor,
    Store, Recall, Inc, Dec, Disp, Memory, Clear,
    Quit, Help, History,
    Ans, E, Pi,
    Equal, Diff, Ge, Le, Gt, Lt,
    And, Or, Not,
    Cond, While, Code, Print,
    Prog, Arg, Call, List, Edit, Del,
    Get, Length, Pop, Push, Put, Set, Show,
    Max, Mean, Median, Min, Order, Prod, Sum, Variance,
    Precision, Base, Deg, Grad, Rad,
} func_t;

/* keyword type */

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

/* global variables */

#define NB_OPERATORS 14
extern keyword_t operators[];

#define NB_FUNCTIONS 56
extern keyword_t functions[];

#define NB_CONSTANTS 3
extern keyword_t constants[];

#define NB_SYMBOLS 4
extern char *symbols[];

/* calculus element type */

typedef struct _element_t {
    func_t func;
    int nbops;
    struct _element_t **ops;
    double value;
    int prio;
    int hidden;
    char *string;
} element_t;

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

/* functions */

element_t *newelement (func_t function, int nbops, int prio);
void delelement (element_t *root);
element_t *dupelement (element_t *root);

#endif /* __ELEMENT_H__ */

/* vim: set ts=4 sw=4 et: */