/* -*-c-*-
*
- * $Id: mpmul.c,v 1.1 2000/07/01 11:21:39 mdw Exp $
+ * $Id: mpmul.c,v 1.4 2001/02/03 12:00:29 mdw Exp $
*
* Multiply many small numbers together
*
/*----- Revision history --------------------------------------------------*
*
* $Log: mpmul.c,v $
+ * Revision 1.4 2001/02/03 12:00:29 mdw
+ * Now @mp_drop@ checks its argument is non-NULL before attempting to free
+ * it. Note that the macro version @MP_DROP@ doesn't do this.
+ *
+ * Revision 1.3 2000/10/08 12:11:22 mdw
+ * Use @MP_EQ@ instead of @MP_CMP@.
+ *
+ * Revision 1.2 2000/07/09 21:31:10 mdw
+ * Fix bug, and add a test rig.
+ *
* Revision 1.1 2000/07/01 11:21:39 mdw
* New interface for computing products of many (small) integers.
*
}
if (i > HWM) {
- while (i > LWM) {
+ while (i > LWM || (i > 0 && MP_LEN(b->v[i - 1]) <= MP_LEN(x))) {
i--;
x = mp_mul(x, x, b->v[i]);
MP_DROP(b->v[i]);
}
}
- b->v[i] = x;
+ b->v[i++] = x;
b->i = i;
}
return (mpmul_done(&b));
}
+/*----- Test rig ----------------------------------------------------------*/
+
+#ifdef TEST_RIG
+
+#include <mLib/testrig.h>
+
+static int vfact(dstr *v)
+{
+ unsigned long x = *(unsigned long *)v[0].buf;
+ mp *fx = *(mp **)v[1].buf;
+ mp *y = mp_factorial(x);
+ int ok = 1;
+ if (!MP_EQ(fx, y)) {
+ fprintf(stderr, "factorial failed\n");
+ MP_FPRINTF(stderr, (stderr, "%lu! = ", x), fx);
+ MP_EPRINT("result", y);
+ ok = 0;
+ }
+ mp_drop(fx);
+ mp_drop(y);
+ assert(mparena_count(MPARENA_GLOBAL) == 0);
+ return (ok);
+}
+
+static test_chunk tests[] = {
+ { "factorial", vfact, { &type_ulong, &type_mp, 0 } },
+ { 0, 0, { 0 } }
+};
+
+int main(int argc, char *argv[])
+{
+ test_run(argc, argv, tests, SRCDIR "/tests/mp");
+ return (0);
+}
+
+#endif
+
/*----- That's all, folks -------------------------------------------------*/