63 lines
2.3 KiB
C
63 lines
2.3 KiB
C
/****************************************************************************
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* libs/libc/dirent/lib_alphasort.c
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*
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* SPDX-License-Identifier: Apache-2.0
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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 <string.h>
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#include <dirent.h>
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: alphasort
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*
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* Description:
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* The alphasort() function can be used as the comparison function
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* compar() for scandir(). It sorts directory entries using strcoll on the
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* strings (*a)->d_name and (*b)->d_name.
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*
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* Input Parameters:
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* a - The first direntry to compare
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* b - The second direntry to compare
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*
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* Returned Value:
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* An integer less than, equal to, or greater than zero if the first
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* argument is considered to be respectively less than, equal to, or
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* greater than the second.
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*
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****************************************************************************/
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int alphasort(FAR const struct dirent **a, FAR const struct dirent **b)
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{
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#ifdef CONFIG_LIBC_LOCALE
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return strcoll((*a)->d_name, (*b)->d_name);
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#else
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return strcmp((*a)->d_name, (*b)->d_name);
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#endif
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}
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