1 files changed, 172 insertions, 172 deletions
diff --git a/nuttx/net/iob/iob_contig.c b/nuttx/net/iob/iob_contig.c
index fd312dfbd..ff9831a21 100755
--- a/nuttx/net/iob/iob_contig.c
+++ b/nuttx/net/iob/iob_contig.c
@@ -1,172 +1,172 @@
-/****************************************************************************
- * net/iob/iob_contig.c
- *
- *   Copyright (C) 2014 Gregory Nutt. All rights reserved.
- *   Author: Gregory Nutt <gnutt@nuttx.org>
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *
- * 1. Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in
- *    the documentation and/or other materials provided with the
- *    distribution.
- * 3. Neither the name NuttX nor the names of its contributors may be
- *    used to endorse or promote products derived from this software
- *    without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
- * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
- * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
- * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
- * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
- * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
- * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
- * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
- * POSSIBILITY OF SUCH DAMAGE.
- *
- ****************************************************************************/
-
-/****************************************************************************
- * Included Files
- ****************************************************************************/
-
-#include <nuttx/config.h>
-
-#include <string.h>
-#include <assert.h>
-#include <errno.h>
-#include <debug.h>
-
-#include <nuttx/net/iob.h>
-
-#include "iob.h"
-
-/****************************************************************************
- * Pre-processor Definitions
- ****************************************************************************/
-
-#ifndef MIN
-#  define MIN(a,b) ((a) < (b) ? (a) : (b))
-#endif
-
-/****************************************************************************
- * Private Types
- ****************************************************************************/
-
-/****************************************************************************
- * Private Data
- ****************************************************************************/
-
-/****************************************************************************
- * Public Data
- ****************************************************************************/
-
-/****************************************************************************
- * Public Functions
- ****************************************************************************/
-
-/****************************************************************************
- * Name: iob_contig
- *
- * Description:
- *   Ensure that there is'len' bytes of contiguous space at the beginning
- *   of the I/O buffer chain starting at 'iob'.
- *
- ****************************************************************************/
-
-int iob_contig(FAR struct iob_s *iob, unsigned int len)
-{
-  FAR struct iob_s *next;
-  unsigned int ncopy;
-
-  /* We can't make more contiguous space that the size of one I/O buffer.
-   * If you get this assertion and really need that much contiguous data,
-   * then you will need to increase CONFIG_IOB_BUFSIZE.
-   */
-
-  DEBUGASSERT(len <= CONFIG_IOB_BUFSIZE);
-
-  /* Check if there is already sufficient, contiguous space at the beginning
-   * of the packet
-   */
-
-  if (len <= iob->io_len)
-    {
-      /* Yes we are good */
-
-      return 0;
-    }
-
-  /* Can we get the required amount of contiguous data by just packing the
-   * head I/0 buffer?
-   */
-
-  else if (len <= iob->io_pktlen)
-    {
-      /* Yes.. First eliminate any leading offset */
-
-      if (iob->io_offset > 0)
-        {
-          memcpy(iob->io_data, &iob->io_data[iob->io_offset], iob->io_len);
-          iob->io_offset = 0;
-        }
-
-      /* Then move what we need from the next I/O buffer(s) */
-
-      do
-        {
-          /* Get the next I/O buffer in the chain */
-
-          next = iob->io_flink;
-          DEBUGASSERT(next != NULL && next->io_len > 0);
-
-          /* Copy what we need or what we can from the next buffer */
-
-          ncopy = len - iob->io_len;
-          ncopy = MIN(ncopy, next->io_len);
-          memcpy(&iob->io_data[iob->io_len],
-                 &next->io_data[next->io_offset], ncopy);
-
-          /* Adjust counts and offsets */
-
-          iob->io_len     += ncopy;
-          next->io_offset += ncopy;
-          next->io_len    -= ncopy;
-
-          /* Handle a (improbable) case where we just emptied the second
-           * buffer in the chain.
-           */
-
-          if (next->io_len == 0)
-            {
-              iob->io_flink = iob_free(next);
-            }
-        }
-      while (len > iob->io_len);
-
-      /* This should always succeed because we know that:
-       *
-       *   pktlen >= CONFIG_IOB_BUFSIZE >= len 
-       */
-
-      return 0;
-    }
-
-  /* Otherwise, the request for contiguous data is larger then the entire
-   * packet.  We can't do that without extending the I/O buffer chain with
-   * garbage (which would probably not be what the caller wants).
-   */
-
-  else
-    {
-      ndbg("ERROR: pktlen=%u < requested len=%u\n", iob->io_pktlen, len);
-      return -ENOSPC;
-    }
-}
+/****************************************************************************
+ * net/iob/iob_contig.c
+ *
+ *   Copyright (C) 2014 Gregory Nutt. All rights reserved.
+ *   Author: Gregory Nutt <gnutt@nuttx.org>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ * 3. Neither the name NuttX nor the names of its contributors may be
+ *    used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+ * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ ****************************************************************************/
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <nuttx/config.h>
+
+#include <string.h>
+#include <assert.h>
+#include <errno.h>
+#include <debug.h>
+
+#include <nuttx/net/iob.h>
+
+#include "iob.h"
+
+/****************************************************************************
+ * Pre-processor Definitions
+ ****************************************************************************/
+
+#ifndef MIN
+#  define MIN(a,b) ((a) < (b) ? (a) : (b))
+#endif
+
+/****************************************************************************
+ * Private Types
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Data
+ ****************************************************************************/
+
+/****************************************************************************
+ * Public Data
+ ****************************************************************************/
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: iob_contig
+ *
+ * Description:
+ *   Ensure that there is'len' bytes of contiguous space at the beginning
+ *   of the I/O buffer chain starting at 'iob'.
+ *
+ ****************************************************************************/
+
+int iob_contig(FAR struct iob_s *iob, unsigned int len)
+{
+  FAR struct iob_s *next;
+  unsigned int ncopy;
+
+  /* We can't make more contiguous space that the size of one I/O buffer.
+   * If you get this assertion and really need that much contiguous data,
+   * then you will need to increase CONFIG_IOB_BUFSIZE.
+   */
+
+  DEBUGASSERT(len <= CONFIG_IOB_BUFSIZE);
+
+  /* Check if there is already sufficient, contiguous space at the beginning
+   * of the packet
+   */
+
+  if (len <= iob->io_len)
+    {
+      /* Yes we are good */
+
+      return 0;
+    }
+
+  /* Can we get the required amount of contiguous data by just packing the
+   * head I/0 buffer?
+   */
+
+  else if (len <= iob->io_pktlen)
+    {
+      /* Yes.. First eliminate any leading offset */
+
+      if (iob->io_offset > 0)
+        {
+          memcpy(iob->io_data, &iob->io_data[iob->io_offset], iob->io_len);
+          iob->io_offset = 0;
+        }
+
+      /* Then move what we need from the next I/O buffer(s) */
+
+      do
+        {
+          /* Get the next I/O buffer in the chain */
+
+          next = iob->io_flink;
+          DEBUGASSERT(next != NULL && next->io_len > 0);
+
+          /* Copy what we need or what we can from the next buffer */
+
+          ncopy = len - iob->io_len;
+          ncopy = MIN(ncopy, next->io_len);
+          memcpy(&iob->io_data[iob->io_len],
+                 &next->io_data[next->io_offset], ncopy);
+
+          /* Adjust counts and offsets */
+
+          iob->io_len     += ncopy;
+          next->io_offset += ncopy;
+          next->io_len    -= ncopy;
+
+          /* Handle a (improbable) case where we just emptied the second
+           * buffer in the chain.
+           */
+
+          if (next->io_len == 0)
+            {
+              iob->io_flink = iob_free(next);
+            }
+        }
+      while (len > iob->io_len);
+
+      /* This should always succeed because we know that:
+       *
+       *   pktlen >= CONFIG_IOB_BUFSIZE >= len
+       */
+
+      return 0;
+    }
+
+  /* Otherwise, the request for contiguous data is larger then the entire
+   * packet.  We can't do that without extending the I/O buffer chain with
+   * garbage (which would probably not be what the caller wants).
+   */
+
+  else
+    {
+      ndbg("ERROR: pktlen=%u < requested len=%u\n", iob->io_pktlen, len);
+      return -ENOSPC;
+    }
+}