#include <stdarg.h>
+#define max(a, b) (((b) > (a))?(b):(a))
+#define min(a, b) (((b) < (a))?(b):(a))
+
#define smalloc(size) ({void *__result__; ((__result__ = malloc(size)) == NULL)?({exit(-1); (void *)0;}):__result__;})
#define srealloc(ptr, size) ({void *__result__; ((__result__ = realloc((ptr), (size))) == NULL)?({exit(-1); (void *)0;}):__result__;})
#define szmalloc(size) memset(smalloc(size), 0, size)
char *sprintf2(char *format, ...);
char *sprintf3(char *format, ...);
off_t atoo(char *n);
+char **tokenize(char *src);
+void freeca(char **ca);
+int calen(char **a);
+void bvprintf(struct charbuf *buf, char *format, va_list al);
+void bprintf(struct charbuf *buf, char *format, ...);
#endif