66 lines
2.3 KiB
C
66 lines
2.3 KiB
C
/****************************************************************************
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* libs/libc/stdio/lib_fsetpos.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 <sys/types.h>
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#include <stdio.h>
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#include <unistd.h>
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#include <fcntl.h>
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#include <errno.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: fsetpos
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*
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* Description:
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* fsetpos() function is an alternate interfaces equivalent to fseek()
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* (with whence set to SEEK_SET). It sets the current value of the file
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* offset to value in the location referenced by pos. On some non-UNIX
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* systems an fpos_t object may be a complex object and fsetpos may be the
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* only way to portably reposition a stream.
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*
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* Returned Value:
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* Zero on success; -1 on failure with errno set appropriately.
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*
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****************************************************************************/
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int fsetpos(FAR FILE *stream, FAR fpos_t *pos)
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{
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#ifdef CONFIG_DEBUG_FEATURES
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if (!stream || !pos)
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{
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set_errno(EINVAL);
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return ERROR;
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}
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#endif
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return fseeko(stream, *pos, SEEK_SET);
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}
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