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/contrib/ntp/sntp/libopts/boolean.c

https://bitbucket.org/freebsd/freebsd-head/
C | 106 lines | 30 code | 5 blank | 71 comment | 8 complexity | cb404c033e5f678e7f1609ca5e191251 MD5 | raw file
  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=*/
 67void
 68optionBooleanVal( 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 */