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Initial CPlayerState RE

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This commit is contained in:
Phillip Stephens
2016-03-19 12:19:43 -07:00
parent 572b5167fe
commit 62e8066a63
9 changed files with 243 additions and 48 deletions
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63
Runtime/IOStreams.cpp
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@@ -3,42 +3,49 @@
namespace urde
{
s32 DecryptionCtx::DecryptRead(CInputStream& in, s32 key)
/*!
* \brief CBitStreamReader::ReadBit
* Reads and decodes an encoded value from a bitstream.
* \param bitCount How many bits to read
* \return s32 The encoded value
*/
s32 CBitStreamReader::ReadEncoded(u32 bitCount)
{
int ret = 0;
if (x20_encShift >= key)
s32 ret = 0;
if (bitCount < x20_bitOffset)
{
int diff = x20_encShift - 0x20;
int baseVal = -1;
if (x20_encShift != 0x20)
baseVal = 1 << (x20_encShift - 1);
x20_encShift = key - x20_encShift;
ret = baseVal | (x1c_encVal >> diff);
u32 diff = 0x20 - bitCount;
u32 baseVal = -1;
if (x20_bitOffset != 0x20)
baseVal = (1 << bitCount) - 1;
x20_bitOffset -= bitCount;
ret = baseVal & (x1c_val >> diff);
x1c_val <<= bitCount;
}
else
{
int diff = x20_encShift - key;
int rem = x20_encShift - 0x20;
int baseVal1 = -1;
if (x20_encShift != 0x20)
baseVal1 = 1 << (x20_encShift - 1);
u32 diff = bitCount - x20_bitOffset;
u32 baseVal = -1;
if (x20_bitOffset != 32)
baseVal = (1 << x20_bitOffset) - 1;
int bit = diff & 7;
x20_encShift = 0;
int count = (diff >> 3) + ((-bit | bit) >> 31);
int baseVal2 = (baseVal1 & (x1c_encVal >> rem)) << diff;
in.readBytesToBuf(&x1c_encVal, count);
u32 bit = diff & 7;
baseVal &= (x1c_val >> (32 - x20_bitOffset));
baseVal <<= diff;
x20_bitOffset = 0;
u32 count = (diff >> 3) + ((-bit | bit) >> 31);
readUBytesToBuf(&x1c_val, count);
/* The game uses Big Endian, which doesn't work for us */
/* Little Endian sucks */
athena::utility::BigUint32(x1c_val);
int baseVal3 = -1;
if (diff != 0x20)
baseVal3 = 1 << (diff - 1);
u32 baseVal2 = -1;
if (diff != 32)
baseVal2 = (1 << diff) - 1;
int tmpShift = x20_encShift;
x20_encShift = (count << 3);
ret = baseVal2 | (baseVal3 & (x1c_encVal >> (diff - 0x20))) << tmpShift;
x20_encShift = diff - x20_encShift;
x1c_encVal = x1c_encVal >> diff;
ret = baseVal | (baseVal2 & (x1c_val >> (32 - diff))) << x20_bitOffset;
x20_bitOffset = (count << 3) - diff;
x1c_val <<= diff;
}
return ret;