xref: /freebsd/contrib/ntp/sntp/libopts/boolean.c (revision a466cc55373fc3cf86837f09da729535b57e69a1)

/**
 * \file boolean.c
 *
 * Handle options with true/false values for arguments.
 *
 * @addtogroup autoopts
 * @{
 */
/*
 *  This routine will run run-on options through a pager so the
 *  user may examine, print or edit them at their leisure.
 *
 *  This file is part of AutoOpts, a companion to AutoGen.
 *  AutoOpts is free software.
 *  AutoOpts is Copyright (C) 1992-2018 by Bruce Korb - all rights reserved
 *
 *  AutoOpts is available under any one of two licenses.  The license
 *  in use must be one of these two and the choice is under the control
 *  of the user of the license.
 *
 *   The GNU Lesser General Public License, version 3 or later
 *      See the files "COPYING.lgplv3" and "COPYING.gplv3"
 *
 *   The Modified Berkeley Software Distribution License
 *      See the file "COPYING.mbsd"
 *
 *  These files have the following sha256 sums:
 *
 *  8584710e9b04216a394078dc156b781d0b47e1729104d666658aecef8ee32e95  COPYING.gplv3
 *  4379e7444a0e2ce2b12dd6f5a52a27a4d02d39d247901d3285c88cf0d37f477b  COPYING.lgplv3
 *  13aa749a5b0a454917a944ed8fffc530b784f5ead522b1aacaf4ec8aa55a6239  COPYING.mbsd
 */

/*=export_func  optionBooleanVal
 * private:
 *
 * what:  Decipher a boolean value
 * arg:   + tOptions * + opts + program options descriptor +
 * arg:   + tOptDesc * + od  + the descriptor for this arg +
 *
 * doc:
 *  Decipher a true or false value for a boolean valued option argument.
 *  The value is true, unless it starts with 'n' or 'f' or "#f" or
 *  it is an empty string or it is a number that evaluates to zero.
=*/
void
optionBooleanVal(tOptions * opts, tOptDesc * od)
{
    char * pz;
    bool   res = true;

    if (INQUERY_CALL(opts, od))
        return;

    if (od->optArg.argString == NULL) {
        od->optArg.argBool = false;
        return;
    }

    switch (*(od->optArg.argString)) {
    case '0':
    {
        long  val = strtol(od->optArg.argString, &pz, 0);
        if ((val != 0) || (*pz != NUL))
            break;
    }
    /* FALLTHROUGH */
    case 'N':
    case 'n':
    case 'F':
    case 'f':
    case NUL:
        res = false;
        break;
    case '#':
        if (od->optArg.argString[1] != 'f')
            break;
        res = false;
    }

    if (od->fOptState & OPTST_ALLOC_ARG) {
        AGFREE(od->optArg.argString);
        od->fOptState &= ~OPTST_ALLOC_ARG;
    }
    od->optArg.argBool = res;
}
/** @}
 *
 * Local Variables:
 * mode: C
 * c-file-style: "stroustrup"
 * indent-tabs-mode: nil
 * End:
 * end of autoopts/boolean.c */