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Andrey K. Choi
2025-10-09 09:57:24 +09:00
commit 4d551bd74f
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71
output/Libraries/BouncyCastle.Crypto/Org/BouncyCastle/Utilities/Zlib/Adler32.cs Normal file
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namespace Org.BouncyCastle.Utilities.Zlib;
internal sealed class Adler32
{
private const int BASE = 65521;
private const int NMAX = 5552;
internal long adler32(long adler, byte[] buf, int index, int len)
{
if (buf == null)
{
return 1L;
}
long num = adler & 0xFFFF;
long num2 = (adler >> 16) & 0xFFFF;
while (len > 0)
{
int num3 = ((len < 5552) ? len : 5552);
len -= num3;
while (num3 >= 16)
{
num += buf[index++] & 0xFF;
num2 += num;
num += buf[index++] & 0xFF;
num2 += num;
num += buf[index++] & 0xFF;
num2 += num;
num += buf[index++] & 0xFF;
num2 += num;
num += buf[index++] & 0xFF;
num2 += num;
num += buf[index++] & 0xFF;
num2 += num;
num += buf[index++] & 0xFF;
num2 += num;
num += buf[index++] & 0xFF;
num2 += num;
num += buf[index++] & 0xFF;
num2 += num;
num += buf[index++] & 0xFF;
num2 += num;
num += buf[index++] & 0xFF;
num2 += num;
num += buf[index++] & 0xFF;
num2 += num;
num += buf[index++] & 0xFF;
num2 += num;
num += buf[index++] & 0xFF;
num2 += num;
num += buf[index++] & 0xFF;
num2 += num;
num += buf[index++] & 0xFF;
num2 += num;
num3 -= 16;
}
if (num3 != 0)
{
do
{
num += buf[index++] & 0xFF;
num2 += num;
}
while (--num3 != 0);
}
num %= 65521;
num2 %= 65521;
}
return (num2 << 16) | num;
}
}