parser.h

   1 #ifndef __PARSER_H__
   2 #define __PARSER_H__
   3
   4 /* global variables */
   5
   6 extern double answer;
   7
   8 /* function type */
   9
  10 typedef enum {
  11     Val = 0, Sig,
  12     Add, Sub,
  13     Mul, Div, Mod,
  14     Pow, Sqr,
  15     Cos, Sin, Tan, Acos, Asin, Atan,
  16     Log, Exp,
  17     Abs, Ceil, Floor,
  18     Store, Recall, Inc, Dec, Disp, Mem, Clear,
  19     Quit, Help,
  20     Ans, E, Pi,
  21     Equal, Diff, Ge, Le, Gt, Lt,
  22     And, Or, Not,
  23     Cond, While, Prog, Print,
  24     Prog, Call, List, Edit, Del
  25 } func_t;
  26
  27 /* keyword type */
  28
  29 typedef struct _keyword_t {
  30     char *keyword;
  31     func_t func;
  32     int nbops;
  33     int offset;
  34     float prio;
  35 } keyword_t;
  36
  37 /* calculus element type */
  38
  39 typedef struct _element_t {
  40     func_t func;
  41     int nbops;
  42     struct _element_t **ops;
  43     double value;
  44     int prio;
  45     int hidden;
  46 } element_t;
  47
  48 #define ERROR_OP ((element_t *)(-1))
  49
  50 /* workspace type */
  51
  52 typedef struct _workspace_t {
  53     int id;
  54     double answer;
  55     double *storage;
  56     element_t *root;
  57 } workspace_t;
  58
  59 /* parser function */
  60
  61 void delelement (element_t *root);
  62
  63 element_t *parser (char *str, char **next, int prio);
  64
  65 void print_element (element_t *root, int level);
  66
  67 double evaluate_element (element_t *root, char mask);
  68
  69 /* completion functions */
  70
  71 char **generate_completion_list ();
  72
  73 void free_completion_list (char **list);
  74
  75 /* print function */
  76
  77 void set_format (char *prompt, int precision);
  78
  79 void free_format ();
  80
  81 double print (double value);
  82
  83 #endif /* __PARSER_H__ */
  84
  85 /* vim: set ts=4 sw=4 et: */