156 lines
3.9 KiB
C
156 lines
3.9 KiB
C
/****************************************************************************
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* libs/libc/stdio/lib_fputs.c
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership. The
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* ASF licenses this file to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance with the
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* License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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*
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****************************************************************************/
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/config.h>
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#include <stdio.h>
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#include <string.h>
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#include <errno.h>
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#include <nuttx/arch.h>
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#include "libc.h"
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: fputs
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*
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* Description:
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* fputs() writes the string s to stream, without its trailing '\0'.
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*
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****************************************************************************/
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#if defined(CONFIG_ARCH_ROMGETC)
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int fputs_unlocked(FAR const IPTR char *s, FAR FILE *stream)
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{
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int nput;
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int ret;
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char ch;
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/* Write the string. Loop until the null terminator is encountered */
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for (nput = 0, ch = up_romgetc(s); ch; nput++, s++, ch = up_romgetc(s))
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{
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/* Write the next character to the stream buffer */
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ret = lib_fwrite_unlocked(&ch, 1, stream);
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if (ret <= 0)
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{
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return EOF;
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}
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/* Flush the buffer if a newline was written to the buffer */
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if (ch == '\n' && (stream->fs_flags & __FS_FLAG_LBF) != 0)
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{
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ret = lib_fflush_unlocked(stream);
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if (ret < 0)
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{
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return EOF;
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}
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}
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}
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return nput;
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}
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#else
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int fputs_unlocked(FAR const IPTR char *s, FAR FILE *stream)
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{
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int nput;
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/* If line buffering is enabled, then we will have to output one character
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* at a time, checking for a newline character each time.
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*/
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if ((stream->fs_flags & __FS_FLAG_LBF) != 0)
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{
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int ret;
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/* Write the string. Loop until the null terminator is encountered */
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for (nput = 0; *s; nput++, s++)
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{
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/* Write the next character to the stream buffer */
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ret = lib_fwrite_unlocked(s, 1, stream);
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if (ret <= 0)
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{
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return EOF;
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}
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/* Flush the buffer if a newline was written to the buffer */
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if (*s == '\n')
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{
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ret = lib_fflush_unlocked(stream);
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if (ret < 0)
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{
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return EOF;
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}
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}
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}
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}
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/* We can write the whole string in one operation without line buffering */
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else
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{
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int ntowrite;
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/* Get the length of the string. */
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ntowrite = strlen(s);
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if (ntowrite == 0)
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{
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return 0;
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}
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/* Write the string */
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nput = lib_fwrite_unlocked(s, ntowrite, stream);
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if (nput < 0)
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{
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return EOF;
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}
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}
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return nput;
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}
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#endif
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int fputs(FAR const IPTR char *s, FAR FILE *stream)
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{
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int ret;
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flockfile(stream);
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ret = fputs_unlocked(s, stream);
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funlockfile(stream);
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return ret;
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}
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