- int stat, total, len;
- int retries;
-
- total = 0;
- stat = xyzModem_cancel;
- /* Try and get 'size' bytes into the buffer */
- while (!xyz.at_eof && (size > 0)) {
- if (xyz.len == 0) {
- retries = xyzModem_MAX_RETRIES;
- while (retries-- > 0) {
- stat = xyzModem_get_hdr();
- if (stat == 0) {
- if (xyz.blk == xyz.next_blk) {
- xyz.tx_ack = true;
- ZM_DEBUG(zm_dprintf("ACK block %d (%d)\n", xyz.blk, __LINE__));
- xyz.next_blk = (xyz.next_blk + 1) & 0xFF;
-
-#if defined(xyzModem_zmodem) || defined(USE_YMODEM_LENGTH)
- if (xyz.mode == xyzModem_xmodem || xyz.file_length == 0) {
-#else
- if (1) {
-#endif
- /* Data blocks can be padded with ^Z (EOF) characters */
- /* This code tries to detect and remove them */
- if ((xyz.bufp[xyz.len-1] == EOF) &&
- (xyz.bufp[xyz.len-2] == EOF) &&
- (xyz.bufp[xyz.len-3] == EOF)) {
- while (xyz.len && (xyz.bufp[xyz.len-1] == EOF)) {
- xyz.len--;
- }
- }
- }
-
-#ifdef USE_YMODEM_LENGTH
- /*
- * See if accumulated length exceeds that of the file.
- * If so, reduce size (i.e., cut out pad bytes)
- * Only do this for Y-modem (and Z-modem should it ever
- * be supported since it can fall back to Y-modem mode).
- */
- if (xyz.mode != xyzModem_xmodem && 0 != xyz.file_length) {
- xyz.read_length += xyz.len;
- if (xyz.read_length > xyz.file_length) {
- xyz.len -= (xyz.read_length - xyz.file_length);
- }
- }
-#endif
- break;
- } else if (xyz.blk == ((xyz.next_blk - 1) & 0xFF)) {
- /* Just re-ACK this so sender will get on with it */
- CYGACC_COMM_IF_PUTC(*xyz.__chan, ACK);
- continue; /* Need new header */
- } else {
- stat = xyzModem_sequence;
- }
- }
- if (stat == xyzModem_cancel) {
- break;
- }
- if (stat == xyzModem_eof) {
- CYGACC_COMM_IF_PUTC(*xyz.__chan, ACK);
- ZM_DEBUG(zm_dprintf("ACK (%d)\n", __LINE__));
- if (xyz.mode == xyzModem_ymodem) {
- CYGACC_COMM_IF_PUTC(*xyz.__chan, (xyz.crc_mode ? 'C' : NAK));
- xyz.total_retries++;
- ZM_DEBUG(zm_dprintf("Reading Final Header\n"));
- stat = xyzModem_get_hdr();
- CYGACC_COMM_IF_PUTC(*xyz.__chan, ACK);
- ZM_DEBUG(zm_dprintf("FINAL ACK (%d)\n", __LINE__));
- }
- xyz.at_eof = true;
- break;
- }
- CYGACC_COMM_IF_PUTC(*xyz.__chan, (xyz.crc_mode ? 'C' : NAK));
- xyz.total_retries++;
- ZM_DEBUG(zm_dprintf("NAK (%d)\n", __LINE__));
- }
- if (stat < 0) {
- *err = stat;
- xyz.len = -1;
- return total;
- }
- }
- /* Don't "read" data from the EOF protocol package */
- if (!xyz.at_eof) {
- len = xyz.len;
- if (size < len) len = size;
- memcpy(buf, xyz.bufp, len);
- size -= len;
- buf += len;
- total += len;
- xyz.len -= len;
- xyz.bufp += len;
- }
+ int stat, total, len;
+ int retries;
+
+ total = 0;
+ stat = xyzModem_cancel;
+ /* Try and get 'size' bytes into the buffer */
+ while (!xyz.at_eof && (size > 0))
+ {
+ if (xyz.len == 0)
+ {
+ retries = xyzModem_MAX_RETRIES;
+ while (retries-- > 0)
+ {
+ stat = xyzModem_get_hdr ();
+ if (stat == 0)
+ {
+ if (xyz.blk == xyz.next_blk)
+ {
+ xyz.tx_ack = true;
+ ZM_DEBUG (zm_dprintf
+ ("ACK block %d (%d)\n", xyz.blk, __LINE__));
+ xyz.next_blk = (xyz.next_blk + 1) & 0xFF;
+
+ if (xyz.mode == xyzModem_xmodem || xyz.file_length == 0)
+ {
+ /* Data blocks can be padded with ^Z (EOF) characters */
+ /* This code tries to detect and remove them */
+ if ((xyz.bufp[xyz.len - 1] == EOF) &&
+ (xyz.bufp[xyz.len - 2] == EOF) &&
+ (xyz.bufp[xyz.len - 3] == EOF))
+ {
+ while (xyz.len
+ && (xyz.bufp[xyz.len - 1] == EOF))
+ {
+ xyz.len--;
+ }
+ }
+ }
+
+ /*
+ * See if accumulated length exceeds that of the file.
+ * If so, reduce size (i.e., cut out pad bytes)
+ * Only do this for Y-modem (and Z-modem should it ever
+ * be supported since it can fall back to Y-modem mode).
+ */
+ if (xyz.mode != xyzModem_xmodem && 0 != xyz.file_length)
+ {
+ xyz.read_length += xyz.len;
+ if (xyz.read_length > xyz.file_length)
+ {
+ xyz.len -= (xyz.read_length - xyz.file_length);
+ }
+ }
+ break;
+ }
+ else if (xyz.blk == ((xyz.next_blk - 1) & 0xFF))
+ {
+ /* Just re-ACK this so sender will get on with it */
+ CYGACC_COMM_IF_PUTC (*xyz.__chan, ACK);
+ continue; /* Need new header */
+ }
+ else
+ {
+ stat = xyzModem_sequence;
+ }
+ }
+ if (stat == xyzModem_cancel)
+ {
+ break;
+ }
+ if (stat == xyzModem_eof)
+ {
+ CYGACC_COMM_IF_PUTC (*xyz.__chan, ACK);
+ ZM_DEBUG (zm_dprintf ("ACK (%d)\n", __LINE__));
+ if (xyz.mode == xyzModem_ymodem)
+ {
+ CYGACC_COMM_IF_PUTC (*xyz.__chan,
+ (xyz.crc_mode ? 'C' : NAK));
+ xyz.total_retries++;
+ ZM_DEBUG (zm_dprintf ("Reading Final Header\n"));
+ stat = xyzModem_get_hdr ();
+ CYGACC_COMM_IF_PUTC (*xyz.__chan, ACK);
+ ZM_DEBUG (zm_dprintf ("FINAL ACK (%d)\n", __LINE__));
+ }
+ xyz.at_eof = true;
+ break;
+ }
+ CYGACC_COMM_IF_PUTC (*xyz.__chan, (xyz.crc_mode ? 'C' : NAK));
+ xyz.total_retries++;
+ ZM_DEBUG (zm_dprintf ("NAK (%d)\n", __LINE__));
+ }
+ if (stat < 0)
+ {
+ *err = stat;
+ xyz.len = -1;
+ return total;
+ }
+ }
+ /* Don't "read" data from the EOF protocol package */
+ if (!xyz.at_eof)
+ {
+ len = xyz.len;
+ if (size < len)
+ len = size;
+ memcpy (buf, xyz.bufp, len);
+ size -= len;
+ buf += len;
+ total += len;
+ xyz.len -= len;
+ xyz.bufp += len;
+ }