| 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: */ |