X509_PURPOSE_get_count
for (i = 0; i < X509_PURPOSE_get_count(); i++) {
for (j = 0; j < X509_PURPOSE_get_count(); j++)
for (i = 0; i < X509_PURPOSE_get_count(); i++) {
int X509_PURPOSE_get_count(void);
&& TEST_int_eq(X509_PURPOSE_get_count() + 1, id)