query.h

   1 #if defined(__CPLUSPLUS__) || defined(__cplusplus)
   2 extern "C" {
   3 #endif
   4
   5 typedef enum {
   6         C_LESSTHAN,     C_LESSOREQ,
   7         C_EQUAL,        C_DIFFERENT,
   8         C_GREATEROREQ,  C_GREATERTHAN
   9 } comp_t;
  10
  11 typedef enum {
  12         T_NUMBER, T_STRING, T_OFIELD, T_SFIELD,
  13         T_COMP, T_NOT, T_AND, T_OR
  14 } type_t;
  15
  16 typedef struct _value {
  17         type_t type;
  18         union {
  19                 long long as_num;
  20                 char *as_str;
  21                 struct {
  22                         comp_t op;
  23                         struct _value *left;
  24                         struct _value *right;
  25                 } as_tree;
  26         };
  27 } value_t;
  28
  29 typedef struct {
  30         char    *(*func)        (void *, char *);
  31         void    *ctx;
  32 } getter_t;
  33 #define CALL_GETTER(g,x)        g->func(g->ctx,x)
  34
  35
  36 value_t *parse          (char *text);
  37 int      eval           (value_t *expr, getter_t *oget, getter_t *sget);
  38 void     free_value     (value_t *);
  39 void     print_value    (value_t *);
  40
  41 #if defined(__CPLUSPLUS__) || defined(__cplusplus)
  42 }
  43 #endif
  44