41           wchar_t *bptr;  member
48           buf->ptr = buf->bptr = calloc(BUF_SIZE, sizeof(*buf->ptr));  in buf_init()
57           free(buf->bptr);  in buf_end()
64           size_t len = (buf->eptr - buf->bptr) +   in buf_grow()
66           wchar_t *nptr = realloc(buf->bptr, len * sizeof(*buf->ptr));  in buf_grow()
71           if (nptr == buf->bptr) {  in buf_grow()
72                     buf->eptr = buf->bptr + len;  in buf_grow()
76           diff = nptr - buf->bptr;  in buf_grow()
77           buf->bptr += diff;  in buf_grow()
78           buf->eptr = buf->bptr + len;  in buf_grow()
93           buf->ptr = buf->bptr;  in buf_reset()
99           return buf->ptr > buf->bptr ? *--buf->ptr : '\0';  in buf_unputc()