_setbufend
extern void _setbufend(FILE *iop, Uchar *end);
_setbufend(iop, endbuf);
_setbufend(iop, temp + size);
_setbufend(iop, temp + size);
#define setbufend(iop, end) _setbufend(iop, end)
extern void _setbufend(FILE *iop, Uchar *end);
_setbufend(iop, temp + size);