re-cmp.h

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#ifndef RE_CMP_H
#define RE_CMP_H

/*   C o n f i g u r a t i o n
 */

#define SAFE_CHECKS     
#define RE_TOKEN_MAX 64 
/*   D o   n o t   c h a n g e    b e l o w
 */

#ifdef uchar
#    undef uchar
#endif
#ifdef Boolean
#    undef Boolean
#endif
#ifdef True
#    undef True
#endif
#ifdef False
#    undef False
#endif

#define uchar   unsigned char
#define Boolean uchar
#define True    1       
#define False   0

typedef enum {
    sel_any,            
    sel_end,            
    sel_single,         
    sel_range,          
    sel_array,          
    sel_not_single,     
    sel_not_range       
} selection_type;

typedef enum {
    rep_once,           
    rep_once_or_more,   
    rep_null_or_once,   
    rep_null_or_more    
} repetetion_type;

typedef struct {
    selection_type type;
    union {
        uchar single;
        struct {
            uchar low, high;
        } range;
        Boolean array[UCHAR_MAX];
    } u;
    repetetion_type repeat;
} selection;

#endif /* RE_CMP_H */