parser.h

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