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Annotation of 42BSD/ingres/source/gutil/setflag.c, revision 1.1.1.1

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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