_IO_BUFSIZ
char buffer[_IO_BUFSIZ];
_IO_size_t count = _IO_sgetn(sbuf, buffer, _IO_BUFSIZ);
static char Buffer[_IO_BUFSIZ];
#define EndBuffer (Buffer+_IO_BUFSIZ)
if (space_left < (_IO_BUFSIZ>>2))
size = _IO_BUFSIZ;
ALLOC_BUF (buf, _IO_BUFSIZ, EOF);
_IO_setb (fp, buf, buf+_IO_BUFSIZ, 1);
#define _IO_setbuf(_FP, _BUF) _IO_setbuffer (_FP, _BUF, _IO_BUFSIZ)
buf = calloc (1, _IO_BUFSIZ);
_IO_str_init_static_internal (&new_f->fp._sf, buf, _IO_BUFSIZ, buf);
_IO_setbuffer (fp, buf, _IO_BUFSIZ);
# define BUFSIZ _IO_BUFSIZ
ALLOC_WBUF (buf, _IO_BUFSIZ, EOF);
_IO_wsetb (fp, buf, buf + _IO_BUFSIZ, 1);
CHAR_T buf[_IO_BUFSIZ];
#define BUFSIZ _IO_BUFSIZ