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Crc32 implementation moved to separate file.

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this implementation uses 'normal' polynomial representation unlike Crc32
defined in GameRes.
This commit is contained in:
morkt
2016-08-19 09:29:06 +04:00
parent 8808b54c88
commit 303a8551b0
4 changed files with 91 additions and 59 deletions
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14
ArcFormats/ShiinaRio/WarcEncryption.cs
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@@ -172,18 +172,8 @@ namespace GameRes.Formats.ShiinaRio
{
if (length < 0x400 || null == m_scheme.DecodeBin)
return;
uint crc = 0xffffffff;
for (int i = 0; i < 0x100; ++i)
{
crc ^= (uint)data[index++] << 24;
for (int j = 0; j < 8; ++j)
{
uint bit = crc & 0x80000000u;
crc <<= 1;
if (0 != bit)
crc ^= 0x04c11db7;
}
}
uint crc = Crc32Normal.UpdateCrc (0xFFFFFFFF, data, index, 0x100);
index += 0x100;
for (int i = 0; i < 0x40; ++i)
{
uint src = LittleEndian.ToUInt32 (data, index) & 0x1ffcu;