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, Atn,
  12     Log, Exp,
  13     Qui, Hel
  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;
  23     int prio;
  24 } keyword_t;
  25
  26 /* calculus element type */
  27
  28 #define MAX_OPERANDS 10
  29 typedef struct _element_t {
  30     func_t func;
  31     int nbops;
  32     struct _element_t *ops[MAX_OPERANDS];
  33     double value;
  34     int prio;
  35 } element_t;
  36
  37 #define ERROR_OP ((element_t *)(-1))
  38
  39 /* parser function */
  40
  41 void delelement (element_t *root);
  42
  43 element_t *parser (char *str, char **next, int prio);
  44
  45 void print_element (element_t *root, int level);
  46
  47 double evaluate_element (element_t *root, char mask);
  48
  49 #endif /* __PARSER_H__ */
  50
  51 /* vim: set ts=4 sw=4 et: */