private void GlobalInit()
{
if (null == bigint_ctx)
{
bigint_ctx = BI_CTX.bi_initialize();
}
}
/* @brief Start a new bigint context.
* @return A bigint context. */
internal static BI_CTX bi_initialize()
{
/* calloc() sets everything to zero */
BI_CTX ctx = new BI_CTX();
/* the radix */
ctx.bi_radix = ctx.Allocate(2);
ctx.bi_radix.comps[0] = 0;
ctx.bi_radix.comps[1] = 1;
ctx.bi_radix.bi_permanent();
return(ctx);
}
internal BigInteger mod_pow(BigInteger modulus, BigInteger exponent)
{
BI_CTX tmp_ctx = BI_CTX.bi_initialize();
tmp_ctx.bi_set_mod(tmp_ctx.bi_clone(modulus._impl),
BIGINT_M_OFFSET);
bigint tmp_biR = tmp_ctx.bi_mod_power(tmp_ctx.bi_clone(_impl),
tmp_ctx.bi_clone(exponent._impl));
bigint biR = bigint_ctx.bi_clone(tmp_biR);
tmp_ctx.bi_free(tmp_biR);
tmp_ctx.bi_free_mod(BIGINT_M_OFFSET);
tmp_ctx.bi_terminate();
return(new BigInteger(biR));
}