1 files changed, 105 insertions, 0 deletions
diff --git a/nuttx/libc/stdio/lib_memoutstream.c b/nuttx/libc/stdio/lib_memoutstream.c
new file mode 100644
index 000000000..21197358b
--- /dev/null
+++ b/nuttx/libc/stdio/lib_memoutstream.c
@@ -0,0 +1,105 @@
+/****************************************************************************
+ * lib/stdio/lib_memoutstream.c
+ *
+ *   Copyright (C) 2007-2009, 2011-2012 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 <assert.h>
+
+#include "lib_internal.h"
+
+/****************************************************************************
+ * Private Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: memoutstream_putc
+ ****************************************************************************/
+
+static void memoutstream_putc(FAR struct lib_outstream_s *this, int ch)
+{
+  FAR struct lib_memoutstream_s *mthis = (FAR struct lib_memoutstream_s *)this;
+
+  DEBUGASSERT(this);
+
+  /* If this will not overrun the buffer, then write the character to the
+   * buffer.  Not that buflen was pre-decremented when the stream was
+   * created so it is okay to write past the end of the buflen by one.
+   */
+
+  if (this->nput < mthis->buflen)
+    {
+      mthis->buffer[this->nput] = ch;
+      this->nput++;
+      mthis->buffer[this->nput] = '\0';
+    }
+}
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: lib_memoutstream
+ *
+ * Description:
+ *   Initializes a stream for use with a fixed-size memory buffer.
+ *
+ * Input parameters:
+ *   memoutstream - User allocated, uninitialized instance of struct
+ *                  lib_memoutstream_s to be initialized.
+ *   bufstart     - Address of the beginning of the fixed-size memory buffer
+ *   buflen       - Size of the fixed-sized memory buffer in bytes
+ *
+ * Returned Value:
+ *   None (memoutstream initialized).
+ *
+ ****************************************************************************/
+
+void lib_memoutstream(FAR struct lib_memoutstream_s *memoutstream,
+                      FAR char *bufstart, int buflen)
+{
+  memoutstream->public.put   = memoutstream_putc;
+#ifdef CONFIG_STDIO_LINEBUFFER
+  memoutstream->public.flush = lib_noflush;
+#endif
+  memoutstream->public.nput  = 0;          /* Will be buffer index */
+  memoutstream->buffer       = bufstart;   /* Start of buffer */
+  memoutstream->buflen       = buflen - 1; /* Save space for null terminator */
+  memoutstream->buffer[0]    = '\0';       /* Start with an empty string */
+}
+
+