40 	char *bptr;  member
47 	buf->ptr = buf->bptr = malloc(BUF_SIZE);  in buf_init()
56 	free(buf->bptr);  in buf_end()
63 	size_t len = (buf->eptr - buf->bptr) +   in buf_grow()
65 	char *nptr = realloc(buf->bptr, len);  in buf_grow()
70 	if (nptr == buf->bptr) {  in buf_grow()
71 		buf->eptr = buf->bptr + len;  in buf_grow()
75 	diff = nptr - buf->bptr;  in buf_grow()
76 	buf->bptr += diff;  in buf_grow()
77 	buf->eptr = buf->bptr + len;  in buf_grow()
92 	buf->ptr = buf->bptr;  in buf_reset()
98 	return buf->ptr > buf->bptr ? *--buf->ptr : '\0';  in buf_unputc()