parser.h

   1 #ifndef __PARSER_H__
   2 #define __PARSER_H__
   3
   4 /* function type */
   5
   6 typedef enum {
   7     Val = 0, Set,
   8     Add, Sub,
   9     Mul, Div, Pow,
  10     Sqr,
  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;
  22 } keyword_t;
  23
  24 /* calculus element type */
  25
  26 #define MAX_OPERANDS 10
  27 typedef struct _element_t {
  28     func_t func;
  29     int nbops;
  30     struct _element_t *ops[MAX_OPERANDS];
  31     float value;
  32 } element_t;
  33
  34 #define ERROR_OP ((element_t *)(-1))
  35
  36 /* parser function */
  37
  38 element_t *parser (char *str, char **next);
  39
  40 void print_element (element_t *root, int level);
  41
  42 #endif /* __PARSER_H__ */
  43
  44 /* vim: set ts=4 sw=4 et: */