contrib/ntp/libopts/boolean.c

   1
   2 /*
   3  *  $Id: boolean.c,v 4.10 2007/02/04 17:44:12 bkorb Exp $
   4  * Time-stamp:      "2007-01-13 10:10:39 bkorb"
   5  *
   6  *   Automated Options Paged Usage module.
   7  *
   8  *  This routine will run run-on options through a pager so the
   9  *  user may examine, print or edit them at their leisure.
  10  */
  11
  12 /*
  13  *  Automated Options copyright 1992-2007 Bruce Korb
  14  *
  15  *  Automated Options is free software.
  16  *  You may redistribute it and/or modify it under the terms of the
  17  *  GNU General Public License, as published by the Free Software
  18  *  Foundation; either version 2, or (at your option) any later version.
  19  *
  20  *  Automated Options is distributed in the hope that it will be useful,
  21  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  22  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  23  *  GNU General Public License for more details.
  24  *
  25  *  You should have received a copy of the GNU General Public License
  26  *  along with Automated Options.  See the file "COPYING".  If not,
  27  *  write to:  The Free Software Foundation, Inc.,
  28  *             51 Franklin Street, Fifth Floor,
  29  *             Boston, MA  02110-1301, USA.
  30  *
  31  * As a special exception, Bruce Korb gives permission for additional
  32  * uses of the text contained in his release of AutoOpts.
  33  *
  34  * The exception is that, if you link the AutoOpts library with other
  35  * files to produce an executable, this does not by itself cause the
  36  * resulting executable to be covered by the GNU General Public License.
  37  * Your use of that executable is in no way restricted on account of
  38  * linking the AutoOpts library code into it.
  39  *
  40  * This exception does not however invalidate any other reasons why
  41  * the executable file might be covered by the GNU General Public License.
  42  *
  43  * This exception applies only to the code released by Bruce Korb under
  44  * the name AutoOpts.  If you copy code from other sources under the
  45  * General Public License into a copy of AutoOpts, as the General Public
  46  * License permits, the exception does not apply to the code that you add
  47  * in this way.  To avoid misleading anyone as to the status of such
  48  * modified files, you must delete this exception notice from them.
  49  *
  50  * If you write modifications of your own for AutoOpts, it is your choice
  51  * whether to permit this exception to apply to your modifications.
  52  * If you do not wish that, delete this exception notice.
  53  */
  54
  55 /*=export_func  optionBooleanVal
  56  * private:
  57  *
  58  * what:  Decipher a boolean value
  59  * arg:   + tOptions* + pOpts    + program options descriptor +
  60  * arg:   + tOptDesc* + pOptDesc + the descriptor for this arg +
  61  *
  62  * doc:
  63  *  Decipher a true or false value for a boolean valued option argument.
  64  *  The value is true, unless it starts with 'n' or 'f' or "#f" or
  65  *  it is an empty string or it is a number that evaluates to zero.
  66 =*/
  67 void
  68 optionBooleanVal( tOptions* pOpts, tOptDesc* pOD )
  69 {
  70     char* pz;
  71     ag_bool  res = AG_TRUE;
  72
  73     switch (*(pOD->optArg.argString)) {
  74     case '0':
  75     {
  76         long  val = strtol( pOD->optArg.argString, &pz, 0 );
  77         if ((val != 0) || (*pz != NUL))
  78             break;
  79         /* FALLTHROUGH */
  80     }
  81     case 'N':
  82     case 'n':
  83     case 'F':
  84     case 'f':
  85     case NUL:
  86         res = AG_FALSE;
  87         break;
  88     case '#':
  89         if (pOD->optArg.argString[1] != 'f')
  90             break;
  91         res = AG_FALSE;
  92     }
  93
  94     if (pOD->fOptState & OPTST_ALLOC_ARG) {
  95         AGFREE(pOD->optArg.argString);
  96         pOD->fOptState &= ~OPTST_ALLOC_ARG;
  97     }
  98     pOD->optArg.argBool = res;
  99 }
 100 /*
 101  * Local Variables:
 102  * mode: C
 103  * c-file-style: "stroustrup"
 104  * indent-tabs-mode: nil
 105  * End:
 106  * end of autoopts/boolean.c */