/*  $OpenBSD: getopt.h,v 1.3 2013/11/22 21:32:49 millert Exp $    */
/*  $NetBSD: getopt.h,v 1.4 2000/07/07 10:43:54 ad Exp $    */

/*-
 * Copyright (c) 2000 The NetBSD Foundation, Inc.
 * All rights reserved.
 *
 * This code is derived from software contributed to The NetBSD Foundation
 * by Dieter Baron and Thomas Klausner.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 */

#ifndef _GETOPT_H_
#define _GETOPT_H_

#include "shell/sys/linux/vsf_linux_cfg.h"
//#include <sys/cdefs.h>
#ifdef __cplusplus
#   define __BEGIN_DECLS    extern "C" {
#   define __END_DECLS      }
#else
#   define __BEGIN_DECLS
#   define __END_DECLS
#endif

/*
 * GNU-like getopt_long()
 */
#define no_argument        0
#define required_argument  1
#define optional_argument  2

struct option {
    /* name of long option */
    const char *name;
    /*
     * one of no_argument, required_argument, and optional_argument:
     * whether option takes an argument
     */
    int has_arg;
    /* if not NULL, set *flag to val when option found */
    int *flag;
    /* if flag not NULL, value to set *flag to; else return value */
    int val;
};

__BEGIN_DECLS

int getopt_long(int, char * const *, const char *,
        const struct option *, int *);
int getopt_long_only(int, char * const *, const char *,
        const struct option *, int *);
int getopt(int, char * const *, const char *);

#ifndef _GETOPT_DEFINED_
#define _GETOPT_DEFINED_

#   if VSF_LINUX_USE_GETOPT == ENABLED && !defined(__VSF_APPLET__)
// for vsf linux, put these variable in process context and implement them as macro
#       include "shell/sys/linux/vsf_linux.h"
extern const vsf_linux_dynlib_mod_t __getopt_long_mod;
struct __getopt_lib_ctx_t {
    char *__optarg;
    int __opterr;
    int __optind;
    int __optopt;
    int __optreset;

    char *__place;
    int __nonopt_start;
    int __nonopt_end;

    struct {
        int __posixly_correct;
    } getopt_internal;
};
#       define getopt_ctx       ((struct __getopt_lib_ctx_t *)vsf_linux_dynlib_ctx_get(&__getopt_long_mod))
#       define opterr           (getopt_ctx->__opterr)
#       define optind           (getopt_ctx->__optind)
#       define optopt           (getopt_ctx->__optopt)
#       define optarg           (getopt_ctx->__optarg)
#       define optreset         (getopt_ctx->__optreset)
#   else
extern   char *optarg;                  /* getopt(3) external variables */
extern   int opterr;
extern   int optind;
extern   int optopt;
extern   int optreset;
#   endif
#endif
__END_DECLS

#endif /* !_GETOPT_H_ */