nuttx/libs/libc/unistd/unistd.h

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/****************************************************************************
* libs/libc/unistd/unistd.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 __LIBC_UNISTD_UNISTD_H
#define __LIBC_UNISTD_UNISTD_H
/****************************************************************************
* Included Files
****************************************************************************/
#include <nuttx/config.h>
#include <stdbool.h>
#include <getopt.h>
#include <nuttx/lib/getopt.h>
/****************************************************************************
* Public Data
****************************************************************************/
#undef EXTERN
#if defined(__cplusplus)
#define EXTERN extern "C"
extern "C"
{
#else
#define EXTERN extern
#endif
/****************************************************************************
* Preprocessor Definitions
****************************************************************************/
/* Mode bit definitions */
#define GETOPT_LONG_BIT (1 << 0) /* Long options supported */
#define GETOPT_LONGONLY_BIT (1 << 1) /* Long-Only behavior supported */
#define GETOPT_HAVE_LONG(m) (((m) & GETOPT_LONG_BIT) != 0)
#define GETOPT_HAVE_LONGONLY(m) (((m) & GETOPT_LONGONLY_BIT) != 0)
/****************************************************************************
* Public Function Prototypes
****************************************************************************/
/* The mode determines which of getopt(), getopt_long(), and
* getopt_long_only() that is being emulated by getopt_common().
*/
enum getopt_mode_e
{
GETOPT_MODE = 0,
GETOPT_LONG_MODE = GETOPT_LONG_BIT,
GETOPT_LONG_ONLY_MODE = (GETOPT_LONG_BIT | GETOPT_LONGONLY_BIT)
};
/****************************************************************************
* Public Function Prototypes
****************************************************************************/
/****************************************************************************
* Name: getoptvars
*
* Description:
* Returns a pointer to to the thread-specific getopt() data.
*
****************************************************************************/
FAR struct getopt_s *getoptvars(void);
/****************************************************************************
* Name: getopt_common
*
* Description:
* getopt_common() is the common, internal implementation of getopt(),
* getopt_long(), and getopt_long_only().
*
****************************************************************************/
int getopt_common(int argc, FAR char * const argv[],
FAR const char *optstring,
FAR const struct option *longopts,
FAR int *longindex,
enum getopt_mode_e mode);
#undef EXTERN
#if defined(__cplusplus)
}
#endif
#endif /* __LIBC_UNISTD_UNISTD_H */