1) bogoconfig.c:

    case 'o':
	if (pass != PASS_1_CLI) {
	    comma_parse(option, val, &spam_cutoff, &ham_cutoff, NULL);
	}

2) bogoconfig.c:

    void comma_parse(char opt, const char *arg, double *parm1, double *parm2, double *parm3)
    ....
    bool ok = ( get_parsed_value(&copy, parm1) &&
		get_parsed_value(&copy, parm2) &&
		get_parsed_value(&copy, parm3) );

3) bogoconfig.c:

    static bool get_parsed_value(char **arg, double *parm)
    ... xatof(parm, str);

4) xatof.c

    int xatof(double *d, const char *in) {
    double val;
    ...
    val = strtod(in, &end);
    ...
    *d = val;

5) bogoconfig.c 

    void query_config(void)
    ...
    fprintf(stdout, "%-11s = %0.6f  # (%8.2e)\n", "ham_cutoff", ham_cutoff, ham_cutoff);
    fprintf(stdout, "%-11s = %0.6f  # (%8.2e)\n", "spam_cutoff", spam_cutoff, spam_cutoff);