## modules/qc/mg_getopt.c

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## DEFINITIONS

This source file includes following functions.

1. mg_new
2. mg_getopt

       1 /*
       2  * Copyright (c) 1987, 1993, 1994
       3  *      The Regents of the University of California.  All rights reserved.
       4  *
       5  * Redistribution and use in source and binary forms, with or without
       6  * modification, are permitted provided that the following conditions
       7  * are met:
       8  * 1. Redistributions of source code must retain the above copyright
       9  *    notice, this list of conditions and the following disclaimer.
      10  * 2. Redistributions in binary form must reproduce the above copyright
      11  *    notice, this list of conditions and the following disclaimer in the
      12  *    documentation and/or other materials provided with the distribution.
      13  * 3. All advertising materials mentioning features or use of this software
      14  *    must display the following acknowledgement:
      15  *      This product includes software developed by the University of
      16  *      California, Berkeley and its contributors.
      17  * 4. Neither the name of the University nor the names of its contributors
      18  *    may be used to endorse or promote products derived from this software
      19  *    without specific prior written permission.
      20  *
      21  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
      22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
      23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
      24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
      25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
      26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
      27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
      28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
      29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
      30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
      31  * SUCH DAMAGE.
      32  */
      33
      34 /* This code has been modified from the original UC version by
      35    Marek Bukowy, RIPE NCC
      36    to be thread-safe
      37 */
      38
      39 #include "rip.h"
      40
      41 #include <stdio.h>
      42 #include <stdlib.h>
      43 #include <string.h>
      44
      45 getopt_state_t *
      46 mg_new(int optind)
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      47 {
      48   getopt_state_t *state;
      49
      50   if( (state=UT_calloc(1, sizeof(getopt_state_t))) != NULL ) {
      51     state->place = EMSG;
      52     state->optind = optind;
      53     state->optreset = 1;
      54   }
      55   return state;
      56 }
      57
      58
      59 /*
      60  * getopt --
      61  *      Parse argc/argv argument vector.
      62  */
      63 int
      64 mg_getopt( int            nargc,
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      65            char * const   *nargv,
      66            const char     *ostr,
      67            getopt_state_t *state)
      68 {
      69   char *oli;                              /* option letter list index */
      70
      71   if (state->optreset || !*state->place) {              /* update scanning pointer */
      72     state->optreset = 0;
      73
      74     /* handle wrongly tokenised space (grrrrr...) - skip empty fields */
      75     while(state->optind < nargc &&  *(nargv[state->optind]) == '\0') {
      76       state->optind++;
      77     }
      78     if (state->optind >= nargc || *(state->place = nargv[state->optind]) != '-') {
      79       state->place = EMSG;
      80       return (-1);
      81     }
      82     if (state->place[1] && *++(state->place) == '-') {      /* found "--" */
      83       ++state->optind;
      84       state->place = EMSG;
      85       return (-1);
      86     }
      87   }                                       /* option letter okay? */
      88   if ((state->optopt = (int)*state->place++) == (int)':' ||
      89       !(oli = strchr(ostr, state->optopt))) {
      90     /*
      91      * if the user didn't specify '-' as an option,
      92      * assume it means -1.
      93      */
      94     if (state->optopt == (int)'-')
      95       return (-1);
      96     if (!*state->place)
      97       ++state->optind;
      98     return (BADCH);
      99   }
     100   if (*++oli != ':') {                    /* don't need argument */
     101     state->optarg = NULL;
     102     if (!*state->place)
     103       ++state->optind;
     104   }
     105   else {                                  /* need an argument */
     106     if (*state->place)                     /* no white space */
     107       state->optarg = state->place;
     108     else if (nargc <= ++state->optind) {   /* no arg */
     109       state->place = EMSG;
     110       if (*ostr == ':')
     111         return (BADARG);
     112
     113       return (BADCH);
     114     }
     115     else                            /* white space */
     116       state->optarg = nargv[state->optind];
     117     state->place = EMSG;
     118     ++state->optind;
     119   }
     120   return (state->optopt);                        /* dump back option letter */
     121 }

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