private static void ModDivCore(ref BigIntegerBuilder regNum, ref BigIntegerBuilder regDen, bool fQuo, ref BigIntegerBuilder regQuo)
{
regQuo.Set((uint)0);
if (regNum._iuLast >= regDen._iuLast)
{
int num = regDen._iuLast + 1;
int num2 = regNum._iuLast - regDen._iuLast;
int cu = num2;
int index = regNum._iuLast;
while (true)
{
if (index < num2)
{
cu++;
break;
}
if (regDen._rgu[index - num2] != regNum._rgu[index])
{
if (regDen._rgu[index - num2] < regNum._rgu[index])
{
cu++;
}
break;
}
index--;
}
if (cu != 0)
{
if (fQuo)
{
regQuo.SetSizeLazy(cu);
}
uint u = regDen._rgu[num - 1];
uint num6 = regDen._rgu[num - 2];
int num7 = NumericsHelpers.CbitHighZero(u);
int num8 = 0x20 - num7;
if (num7 > 0)
{
u = (u << num7) | (num6 >> num8);
num6 = num6 << num7;
if (num > 2)
{
num6 |= regDen._rgu[num - 3] >> num8;
}
}
regNum.EnsureWritable();
int num9 = cu;
while (--num9 >= 0)
{
uint uHi = ((num9 + num) <= regNum._iuLast) ? regNum._rgu[num9 + num] : 0;
ulong num11 = NumericsHelpers.MakeUlong(uHi, regNum._rgu[(num9 + num) - 1]);
uint uLo = regNum._rgu[(num9 + num) - 2];
if (num7 > 0)
{
num11 = (num11 << num7) | (uLo >> num8);
uLo = uLo << num7;
if ((num9 + num) >= 3)
{
uLo |= regNum._rgu[(num9 + num) - 3] >> num8;
}
}
ulong num13 = num11 / ((ulong)u);
ulong num14 = (uint)(num11 % ((ulong)u));
if (num13 > 0xffffffffL)
{
num14 += u * (num13 - 0xffffffffL);
num13 = 0xffffffffL;
}
while ((num14 <= 0xffffffffL) && ((num13 * num6) > NumericsHelpers.MakeUlong((uint)num14, uLo)))
{
num13 -= (ulong)1L;
num14 += u;
}
if (num13 > 0L)
{
ulong num15 = 0L;
for (int i = 0; i < num; i++)
{
num15 += regDen._rgu[i] * num13;
uint num17 = (uint)num15;
num15 = num15 >> 0x20;
if (regNum._rgu[num9 + i] < num17)
{
num15 += (ulong)1L;
}
regNum._rgu[num9 + i] -= num17;
}
if (uHi < num15)
{
uint uCarry = 0;
for (int j = 0; j < num; j++)
{
uCarry = AddCarry(ref regNum._rgu[num9 + j], regDen._rgu[j], uCarry);
}
num13 -= (ulong)1L;
}
regNum._iuLast = (num9 + num) - 1;
}
if (fQuo)
{
if (cu == 1)
{
regQuo._uSmall = (uint)num13;
}
else
{
regQuo._rgu[num9] = (uint)num13;
}
}
}
regNum._iuLast = num - 1;
regNum.Trim();
}
}
}
private static void LehmerGcd(ref BigIntegerBuilder reg1, ref BigIntegerBuilder reg2)
{
int num;
uint num2;
int sign = 1;
START:
num = reg1._iuLast + 1;
int b = reg2._iuLast + 1;
if (num < b)
{
Py.Core.Util.Swap <BigIntegerBuilder>(ref reg1, ref reg2);
Py.Core.Util.Swap <int>(ref num, ref b);
}
if (b == 1)
{
if (num == 1)
{
reg1._uSmall = NumericsHelpers.GCD(reg1._uSmall, reg2._uSmall);
return;
}
if (reg2._uSmall != 0)
{
reg1.Set(NumericsHelpers.GCD(Mod(ref reg1, reg2._uSmall), reg2._uSmall));
}
return;
}
if (num == 2)
{
reg1.Set(NumericsHelpers.GCD(reg1.GetHigh2(2), reg2.GetHigh2(2)));
return;
}
if (b <= (num - 2))
{
reg1.Mod(ref reg2);
goto START;
}
ulong a = reg1.GetHigh2(num);
ulong num6 = reg2.GetHigh2(num);
int num7 = NumericsHelpers.CbitHighZero((ulong)(a | num6));
if (num7 > 0)
{
a = (a << num7) | (reg1._rgu[num - 3] >> (0x20 - num7));
num6 = (num6 << num7) | (reg2._rgu[num - 3] >> (0x20 - num7));
}
if (a < num6)
{
Py.Core.Util.Swap <ulong>(ref a, ref num6);
Py.Core.Util.Swap <BigIntegerBuilder>(ref reg1, ref reg2);
}
if ((a == ulong.MaxValue) || (num6 == ulong.MaxValue))
{
a = a >> 1;
num6 = num6 >> 1;
}
if (a == num6)
{
reg1.Sub(ref sign, ref reg2);
goto START;
}
if (NumericsHelpers.GetHi(num6) == 0)
{
reg1.Mod(ref reg2);
goto START;
}
uint num8 = 1;
uint num9 = 0;
uint num10 = 0;
uint num11 = 1;
Label_0162:
num2 = 1;
ulong num12 = a - num6;
while ((num12 >= num6) && (num2 < 0x20))
{
num12 -= num6;
num2++;
}
if (num12 >= num6)
{
ulong num13 = a / num6;
if (num13 > 0xffffffffL)
{
goto Label_02A3;
}
num2 = (uint)num13;
num12 = a - (num2 * num6);
}
ulong num14 = num8 + (num2 * num10);
ulong num15 = num9 + (num2 * num11);
if (((num14 <= 0x7fffffffL) && (num15 <= 0x7fffffffL)) && ((num12 >= num15) && ((num12 + num14) <= (num6 - num10))))
{
num8 = (uint)num14;
num9 = (uint)num15;
a = num12;
if (a > num9)
{
num2 = 1;
num12 = num6 - a;
while ((num12 >= a) && (num2 < 0x20))
{
num12 -= a;
num2++;
}
if (num12 >= a)
{
ulong num16 = num6 / a;
if (num16 > 0xffffffffL)
{
goto Label_02A3;
}
num2 = (uint)num16;
num12 = num6 - (num2 * a);
}
num14 = num11 + (num2 * num9);
num15 = num10 + (num2 * num8);
if (((num14 <= 0x7fffffffL) && (num15 <= 0x7fffffffL)) && ((num12 >= num15) && ((num12 + num14) <= (a - num9))))
{
num11 = (uint)num14;
num10 = (uint)num15;
num6 = num12;
if (num6 > num10)
{
goto Label_0162;
}
}
}
}
Label_02A3:
if (num9 == 0)
{
if ((a / ((ulong)2L)) >= num6)
{
reg1.Mod(ref reg2);
}
else
{
reg1.Sub(ref sign, ref reg2);
}
}
else
{
reg1.SetSizeKeep(b, 0);
reg2.SetSizeKeep(b, 0);
int num17 = 0;
int num18 = 0;
for (int i = 0; i < b; i++)
{
uint num20 = reg1._rgu[i];
uint num21 = reg2._rgu[i];
long num22 = ((num20 * num8) - (num21 * num9)) + num17;
long num23 = ((num21 * num11) - (num20 * num10)) + num18;
num17 = (int)(num22 >> 0x20);
num18 = (int)(num23 >> 0x20);
reg1._rgu[i] = (uint)num22;
reg2._rgu[i] = (uint)num23;
}
reg1.Trim();
reg2.Trim();
}
goto START;
}