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libc: implement getopt_long partially

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only the short option is supported now

Signed-off-by: Xiang Xiao <xiaoxiang@xiaomi.com>
This commit is contained in:
Xiang Xiao 2020-11-17 09:27:01 -08:00 • committed by patacongo
parent af53bdb048
commit 759b63d4be
2 changed files with 85 additions and 1 deletions
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76
include/getopt.h Normal file
View file

@ -0,0 +1,76 @@
/****************************************************************************
* include/getopt.h
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership. The
* ASF licenses this file to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance with the
* License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
* License for the specific language governing permissions and limitations
* under the License.
*
****************************************************************************/
#ifndef __INCLUDE_GETOPT_H
#define __INCLUDE_GETOPT_H
/****************************************************************************
* Included Files
****************************************************************************/
#include <nuttx/config.h>
#include <nuttx/compiler.h>
#include <unistd.h>
/****************************************************************************
* Pre-processor Definitions
****************************************************************************/
#define no_argument 0
#define required_argument 1
#define optional_argument 2
/****************************************************************************
* Public Type Definitions
****************************************************************************/
#undef EXTERN
#if defined(__cplusplus)
#define EXTERN extern "C"
extern "C"
{
#else
#define EXTERN extern
#endif
struct option
{
FAR const char *name;
int has_arg;
FAR int *flag;
int val;
};
/****************************************************************************
* Public Function Prototypes
****************************************************************************/
int getopt_long(int argc, FAR char *const argv[],
FAR const char *shortopts,
FAR const struct option *longopts,
FAR int *longind);
#undef EXTERN
#if defined(__cplusplus)
}
#endif
#endif /* __INCLUDE_GETOPT_H */

10
libs/libc/unistd/lib_getopt.c
View file

@ -40,7 +40,7 @@
#include <nuttx/config.h>
#include <stdbool.h>
#include <unistd.h>
#include <getopt.h>
#include <string.h>
/****************************************************************************
@ -294,3 +294,11 @@ int getopt(int argc, FAR char * const argv[], FAR const char *optstring)
g_binitialized = false;
return ERROR;
}
int getopt_long(int argc, FAR char *const argv[],
FAR const char *shortopts,
FAR const struct option *longopts,
FAR int *longind)
{
return getopt(argc, argv, shortopts);
}