/*
 * Copyright (c) 1987, 1993, 1994
 *  The Regents of the University of California.  All rights reserved.
 *
 * 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.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *  This product includes software developed by the University of
 *  California, Berkeley and its contributors.
 * 4. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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.
 */

/* last review : october 29th, 2002 */

#if defined(LIBC_SCCS) && !defined(lint)
static char sccsid[] = "@(#)getopt.c  8.3 (Berkeley) 4/27/95";
#endif        /* LIBC_SCCS and not lint */

#include <stdio.h>
#include <stdlib.h>
#include <string.h>

int opterr = 1,      /* if error message should be printed */
 optind = 1,      /* index into parent argv vector */
 optopt,      /* character checked for validity */
 optreset;      /* reset getopt */
const char *optarg;      /* argument associated with option */

typedef struct option
{
  const char *name;
  int has_arg;
  int *flag;
  int val;
}option_t;

#define  BADCH  (int)'?'
#define  BADARG  (int)':'
#define  EMSG  ""



/*
 * getopt --
 *  Parse argc/argv argument vector.
 */
int getopt(int nargc, char *const *nargv, const char *ostr) {
#  define __progname nargv[0]
  static const char *place = EMSG;  /* option letter processing */
  char *oli;      /* option letter list index */

  if (optreset || !*place) {  /* update scanning pointer */
    optreset = 0;
    if (optind >= nargc || *(place = nargv[optind]) != '-') {
      place = EMSG;
      return (-1);
    }
    if (place[1] && *++place == '-') {  /* found "--" */
      ++optind;
      place = EMSG;
      return (-1);
    }
  }        /* option letter okay? */
  if ((optopt = (int) *place++) == (int) ':' ||
      !(oli = strchr(ostr, optopt))) {
    /*
     * if the user didn't specify '-' as an option,
     * assume it means -1.
     */
    if (optopt == (int) '-')
      return (-1);
    if (!*place)
      ++optind;
    if (opterr && *ostr != ':') {
      fprintf(stderr,
         "%s: illegal option -- %c\n", __progname, optopt);
      return (BADCH);
    }
  }
  if (*++oli != ':') {    /* don't need argument */
    optarg = NULL;
    if (!*place)
      ++optind;
  } else {      /* need an argument */
    if (*place)      /* no white space */
      optarg = place;
    else if (nargc <= ++optind) {  /* no arg */
      place = EMSG;
      if (*ostr == ':')
  return (BADARG);
      if (opterr) {
        fprintf(stderr,
           "%s: option requires an argument -- %c\n",
           __progname, optopt);
        return (BADCH);
      }
    } else      /* white space */
      optarg = nargv[optind];
    place = EMSG;
    ++optind;
  }
  return (optopt);    /* dump back option letter */
}


int getopt_long(int argc, char * const argv[], const char *optstring,
struct option *longopts, int totlen) {
  static int lastidx,lastofs;
  char *tmp;
  int i,len;
  char param = 1;

again:
  if (optind>argc || !argv[optind] || *argv[optind]!='-')
    return -1;

  if (argv[optind][0]=='-' && argv[optind][1]==0) {
    if(optind >= (argc - 1)){ /* no more input parameters */
      param = 0;
    }
    else{ /* more input parameters */
      if(argv[optind + 1][0] == '-'){
        param = 0; /* Missing parameter after '-' */
      }
      else{
        param = 2;
      }
    }
  }

  if (param == 0) {
    ++optind;
    return (BADCH);
  }

  if (argv[optind][0]=='-') {  /* long option */
    char* arg=argv[optind]+1;
    const struct option* o;
    o=longopts;
    len=sizeof(longopts[0]);

    if (param > 1){
      arg = argv[optind+1];
      optind++;
    }
    else
      arg = argv[optind]+1;

    if(strlen(arg)>1){
      for (i=0;i<totlen;i=i+len,o++) {
        if (!strcmp(o->name,arg)) {  /* match */
          if (o->has_arg == 0) {
            if ((argv[optind+1])&&(!(argv[optind+1][0]=='-'))){
              fprintf(stderr,"%s: option does not require an argument. Ignoring %s\n",arg,argv[optind+1]);
              ++optind;
            }
          }else{
            optarg=argv[optind+1];
            if(optarg){
              if (optarg[0] == '-'){ /* Has read next input parameter: No arg for current parameter */
                if (opterr) {
                  fprintf(stderr,"%s: option requires an argument\n",arg);
                  return (BADCH);
                }
              }
            }
            if (!optarg && o->has_arg==1) {  /* no argument there */
              if (opterr) {
                fprintf(stderr,"%s: option requires an argument \n",arg);
                return (BADCH);
              }
            }
            ++optind;
          }
          ++optind;
          if (o->flag)
            *(o->flag)=o->val;
          else
            return o->val;
          return 0;
        }
      }//(end for)String not found in the list
      fprintf(stderr,"Invalid option %s\n",arg);
      ++optind;
      return (BADCH);
    }else{ /*Single character input parameter*/
      if (*optstring==':') return ':';
      if (lastidx!=optind) {
        lastidx=optind; lastofs=0;
      }
      optopt=argv[optind][lastofs+1];
      if ((tmp=strchr(optstring,optopt))) {/*Found input parameter in list*/
        if (*tmp==0) {  /* apparently, we looked for \0, i.e. end of argument */
          ++optind;
          goto again;
        }
        if (tmp[1]==':') {  /* argument expected */
          if (tmp[2]==':' || argv[optind][lastofs+2]) {  /* "-foo", return "oo" as optarg */
            if (!*(optarg=argv[optind]+lastofs+2)) optarg=0;
            goto found;
          }
          optarg=argv[optind+1];
          if(optarg){
            if (optarg[0] == '-'){ /* Has read next input parameter: No arg for current parameter */
              if (opterr) {
                fprintf(stderr,"%s: option requires an argument\n",arg);
                return (BADCH);
              }
            }
          }
          if (!optarg) {  /* missing argument */
            if (opterr) {
              fprintf(stderr,"%s: option requires an argument\n",arg);
              return (BADCH);
            }
          }
          ++optind;
        }else {/*Argument not expected*/
          ++lastofs;
          return optopt;
        }
found:
        ++optind;
        return optopt;
      }  else {  /* not found */
        fprintf(stderr,"Invalid option %s\n",arg);
        ++optind;
        return (BADCH);
      }//end of not found

    }// end of single character
  }//end '-'
  fprintf(stderr,"Invalid option\n");
  ++optind;
  return (BADCH);;
}//end function
