5cb8226727
git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@5331 42af7a65-404d-4744-a932-0658087f49c3
131 lines
4.8 KiB
C
131 lines
4.8 KiB
C
/****************************************************************************
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* libc/stdio/lib_puts.c
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*
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* Copyright (C) 2007, 2008, 2011-2012 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <gnutt@nuttx.org>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* 3. Neither the name NuttX nor the names of its contributors may be
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* used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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****************************************************************************/
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/****************************************************************************
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* Compilation Switches
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****************************************************************************/
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <stdio.h>
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#include "lib_internal.h"
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/****************************************************************************
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* Definitions
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****************************************************************************/
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/****************************************************************************
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* Private Type Declarations
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****************************************************************************/
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/****************************************************************************
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* Private Function Prototypes
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****************************************************************************/
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/****************************************************************************
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* Global Function Prototypes
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****************************************************************************/
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/****************************************************************************
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* Public Constant Data
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****************************************************************************/
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/****************************************************************************
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* Public Variables
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****************************************************************************/
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/****************************************************************************
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* Private Constant Data
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****************************************************************************/
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/****************************************************************************
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* Private Variables
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****************************************************************************/
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: puts
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*
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* Description:
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* puts() writes the string s and a trailing newline to stdout.
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*
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****************************************************************************/
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int puts(FAR const char *s)
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{
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FILE *stream = stdout;
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int nwritten;
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int nput = EOF;
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int ret;
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/* Write the string (the next two steps must be atomic) */
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lib_take_semaphore(stream);
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/* Write the string without its trailing '\0' */
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nwritten = fputs(s, stream);
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if (nwritten > 0)
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{
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/* Followed by a newline */
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char newline = '\n';
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ret = lib_fwrite(&newline, 1, stream);
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if (ret > 0)
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{
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nput = nwritten + 1;
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/* Flush the buffer after the newline is output. */
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#ifdef CONFIG_STDIO_LINEBUFFER
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ret = lib_fflush(stream, true);
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if (ret < 0)
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{
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nput = EOF;
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}
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#endif
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}
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}
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lib_give_semaphore(stdout);
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return nput;
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}
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