Completes coding of the PWM module

git-svn-id: https://nuttx.svn.sourceforge.net/svnroot/nuttx/trunk@4200 7fd9a85b-ad96-42d3-883c-3090e2eb8679

1 files changed, 180 insertions, 0 deletions

diff --git a/nuttx/lib/stdio/lib_fopen.c b/nuttx/lib/stdio/lib_fopen.c
new file mode 100644
index 000000000..f90951fe2
--- /dev/null
+++ b/nuttx/lib/stdio/lib_fopen.c
@@ -0,0 +1,180 @@
+/****************************************************************************
+ * lib/stdio/lib_fopen.c
+ *
+ *   Copyright (C) 2007-2011 Gregory Nutt. All rights reserved.
+ *   Author: Gregory Nutt <spudmonkey@racsa.co.cr>
+ *
+ * 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 <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <string.h>
+#include <errno.h>
+
+#include "lib_internal.h"
+
+/****************************************************************************
+ * Private Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: lib_mode2oflags
+ ****************************************************************************/
+
+static int lib_mode2oflags(FAR const char *mode)
+{
+  int oflags = 0;
+  if (mode)
+    {
+      while(*mode)
+        {
+          switch (*mode)
+            {
+             /* Open for read access */
+
+             case 'r' :
+               if (*(mode + 1) == '+')
+                 {
+                   /* Open for read/write access */
+
+                   oflags |= O_RDWR;
+                   mode++;
+                 }
+               else
+                 {
+                   /* Open for read access */
+
+                   oflags |= O_RDOK;
+                 }
+               break;
+
+             /* Open for write access? */
+
+             case 'w' :
+               if (*(mode + 1) == '+')
+                 {
+                   /* Open for write read/access, truncating any existing file */
+
+                   oflags |= O_RDWR|O_CREAT|O_TRUNC;
+                   mode++;
+                 }
+               else
+                 {
+                   /* Open for write access, truncating any existing file */
+
+                   oflags |= O_WROK|O_CREAT|O_TRUNC;
+                 }
+               break;
+
+             /* Open for write/append access? */
+
+             case 'a' :
+               if (*(mode + 1) == '+')
+                 {
+                   /* Read from the beginning of the file; write to the end */
+
+                   oflags |= O_RDWR|O_CREAT|O_APPEND;
+                   mode++;
+                 }
+               else
+                 {
+                   /* Write to the end of the file */
+
+                   oflags |= O_WROK|O_CREAT|O_APPEND;
+                 }
+               break;
+
+             /* Open for binary access? */
+
+             case 'b' :
+             default:
+               break;
+            }
+          mode++;
+        }
+    }
+  return oflags;
+}
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: fdopen
+ ****************************************************************************/
+
+FAR FILE *fdopen(int fd, FAR const char *mode)
+{
+  return fs_fdopen(fd, lib_mode2oflags(mode), NULL);
+}
+
+/****************************************************************************
+ * Name: fopen
+ ****************************************************************************/
+
+FAR FILE *fopen(FAR const char *path, FAR const char *mode)
+{
+  FAR FILE *ret = NULL;
+  int oflags;
+  int fd;
+
+  /* Open the file */
+
+  oflags = lib_mode2oflags(mode);
+  fd = open(path, oflags, 0666);
+
+  /* If the open was successful, then fdopen() the fil using the file
+   * desciptor returned by open.  If open failed, then just return the
+   * NULL stream -- open() has already set the errno.
+   */
+
+  if (fd >= 0)
+    {
+      ret = fs_fdopen(fd, oflags, NULL);
+      if (!ret)
+        {
+          /* Don't forget to close the file descriptor if any other
+           * failures are reported by fdopen().
+           */
+
+          (void)close(fd);
+        }
+    }
+  return ret;
+}