#define ALLOC(type, number) ((type *)calloc(sizeof(type), number))
#define	FREE(p)	{free(*p);*p=NULL;}
#ifndef MAX
#define MAX(a, b)  	(((a) > (b)) ? (a) : (b))
#endif

#ifndef MIN
#define MIN(a, b)  	(((a) < (b)) ? (a) : (b))
#endif