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Annotation of 42BSD/ingres/source/gutil/setflag.c, revision 1.1

1.1     ! root        1: # include      <sccs.h>
        !             2: 
        !             3: SCCSID(@(#)setflag.c   7.1     2/5/81)
        !             4: 
        !             5: /*
        !             6: **  SET FLAG
        !             7: **
        !             8: **     This routine sets flags from argv.  You give arguments
        !             9: **     of the argv, the flag to be detected, and the default
        !            10: **     for that flag (if it is not supplied).  The return value
        !            11: **     is the flag value.   For example:
        !            12: **             setflag(argv, 'x', 2);
        !            13: **     returns zero if the "-x" flag is stated, and one if the
        !            14: **     "+x" flag is stated.  It returns 2 if the flag is not
        !            15: **     stated at all.
        !            16: */
        !            17: 
        !            18: # define       NULL    0
        !            19: 
        !            20: setflag(argv, flagch, def)
        !            21: char   **argv;
        !            22: char   flagch;
        !            23: int    def;
        !            24: {
        !            25:        register char   **p;
        !            26:        register char   *q;
        !            27:        register int    rtval;
        !            28: 
        !            29:        rtval = -1;
        !            30:        for (p = &argv[1]; *p != NULL; p++)
        !            31:        {
        !            32:                q = *p;
        !            33:                if (q[1] != flagch)
        !            34:                        continue;
        !            35:                if (*q != '-' && *q != '+')
        !            36:                        continue;
        !            37:                rtval = (q[0] == '+');
        !            38:        }
        !            39:        if (rtval < 0)
        !            40:                rtval = def;
        !            41:        return (rtval);
        !            42: }

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