+ while ( (len = Ustrlen(big_buffer)) == big_buffer_size-1
+ && big_buffer[len-1] != '\n'
+ )
+ { /* buffer not big enough for line; certs make this possible */
+ uschar * buf;
+ if (big_buffer_size >= BIG_BUFFER_SIZE*4) goto SPOOL_READ_ERROR;
+ buf = store_get_perm(big_buffer_size *= 2);
+ memcpy(buf, big_buffer, --len);
+ big_buffer = buf;
+ if (Ufgets(big_buffer+len, big_buffer_size-len, f) == NULL)
+ goto SPOOL_READ_ERROR;
+ }
+ big_buffer[len-1] = 0;