void set_bool(void *v, const char *arg)
{
    char *p = (char *)v;
    int f = get_false_true(arg);
    *p = -1 == f ? 0 == *p : 0 != f;
}
Exemple #2
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void set_bool(bool *v, const char *arg)
{
	int f = get_false_true(arg);
	*v = -1 == f ? false == *v : f;
}