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SandTraySystem_HDTXC_danji/Assets/Scripts/Serialization/MessagePack/LZ4/Codec/LZ4Codec.Safe32.Dirty.cs

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#region LZ4 original
/*
LZ4 - Fast LZ compression algorithm
Copyright (C) 2011-2012, Yann Collet.
BSD 2-Clause License (http://www.opensource.org/licenses/bsd-license.php)
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are
met:
* Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.
* Redistributions in binary form must reproduce the above
copyright notice, this list of conditions and the following disclaimer
in the documentation and/or other materials provided with the
distribution.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
You can contact the author at :
- LZ4 homepage : http://fastcompression.blogspot.com/p/lz4.html
- LZ4 source repository : http://code.google.com/p/lz4/
*/
#endregion
#region LZ4 port
/*
Copyright (c) 2013, Milosz Krajewski
All rights reserved.
Redistribution and use in source and binary forms, with or without modification, are permitted provided
that the following conditions are met:
* Redistributions of source code must retain the above copyright notice, this list of conditions
and the following disclaimer.
* Redistributions in binary form must reproduce the above copyright notice, this list of conditions
and the following disclaimer in the documentation and/or other materials provided with the distribution.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED
WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#endregion
// ReSharper disable CheckNamespace
// ReSharper disable InconsistentNaming
// ReSharper disable TooWideLocalVariableScope
// ReSharper disable JoinDeclarationAndInitializer
// ReSharper disable RedundantIfElseBlock
namespace MessagePack.LZ4
{
public static partial class LZ4Codec
{
#region LZ4_compressCtx
private static int LZ4_compressCtx_safe32(
int[] hash_table,
byte[] src,
byte[] dst,
int src_0,
int dst_0,
int src_len,
int dst_maxlen)
{
unchecked
{
var debruijn32 = DEBRUIJN_TABLE_32;
int _i;
// ---- preprocessed source start here ----
// r93
var src_p = src_0;
var src_base = src_0;
var src_anchor = src_p;
var src_end = src_p + src_len;
var src_mflimit = src_end - MFLIMIT;
var dst_p = dst_0;
var dst_end = dst_p + dst_maxlen;
var src_LASTLITERALS = src_end - LASTLITERALS;
var src_LASTLITERALS_1 = src_LASTLITERALS - 1;
var src_LASTLITERALS_STEPSIZE_1 = src_LASTLITERALS - (STEPSIZE_32 - 1);
var dst_LASTLITERALS_1 = dst_end - (1 + LASTLITERALS);
var dst_LASTLITERALS_3 = dst_end - (2 + 1 + LASTLITERALS);
int length;
uint h, h_fwd;
// Init
if (src_len < MINLENGTH) goto _last_literals;
// First Byte
hash_table[(((Peek4(src, src_p)) * 2654435761u) >> HASH_ADJUST)] = (src_p - src_base);
src_p++;
h_fwd = (((Peek4(src, src_p)) * 2654435761u) >> HASH_ADJUST);
// Main Loop
while (true)
{
var findMatchAttempts = (1 << SKIPSTRENGTH) + 3;
var src_p_fwd = src_p;
int src_ref;
int dst_token;
// Find a match
do
{
h = h_fwd;
var step = findMatchAttempts++ >> SKIPSTRENGTH;
src_p = src_p_fwd;
src_p_fwd = src_p + step;
if (src_p_fwd > src_mflimit) goto _last_literals;
h_fwd = (((Peek4(src, src_p_fwd)) * 2654435761u) >> HASH_ADJUST);
src_ref = src_base + hash_table[h];
hash_table[h] = (src_p - src_base);
} while ((src_ref < src_p - MAX_DISTANCE) || (!Equal4(src, src_ref, src_p)));
// Catch up
while ((src_p > src_anchor) && (src_ref > src_0) && (src[src_p - 1] == src[src_ref - 1]))
{
src_p--;
src_ref--;
}
// Encode Literal length
length = (src_p - src_anchor);
dst_token = dst_p++;
if (dst_p + length + (length >> 8) > dst_LASTLITERALS_3) return 0; // Check output limit
if (length >= RUN_MASK)
{
var len = length - RUN_MASK;
dst[dst_token] = (RUN_MASK << ML_BITS);
if (len > 254)
{
do
{
dst[dst_p++] = 255;
len -= 255;
} while (len > 254);
dst[dst_p++] = (byte)len;
BlockCopy(src, src_anchor, dst, dst_p, length);
dst_p += length;
goto _next_match;
}
else
dst[dst_p++] = (byte)len;
}
else
{
dst[dst_token] = (byte)(length << ML_BITS);
}
// Copy Literals
if (length > 0)
{
_i = dst_p + length;
WildCopy(src, src_anchor, dst, dst_p, _i);
dst_p = _i;
}
_next_match:
// Encode Offset
Poke2(dst, dst_p, (ushort)(src_p - src_ref));
dst_p += 2;
// Start Counting
src_p += MINMATCH;
src_ref += MINMATCH; // MinMatch already verified
src_anchor = src_p;
while (src_p < src_LASTLITERALS_STEPSIZE_1)
{
var diff = (int)Xor4(src, src_ref, src_p);
if (diff == 0)
{
src_p += STEPSIZE_32;
src_ref += STEPSIZE_32;
continue;
}
src_p += debruijn32[((uint)((diff) & -(diff)) * 0x077CB531u) >> 27];
goto _endCount;
}
if ((src_p < src_LASTLITERALS_1) && (Equal2(src, src_ref, src_p)))
{
src_p += 2;
src_ref += 2;
}
if ((src_p < src_LASTLITERALS) && (src[src_ref] == src[src_p])) src_p++;
_endCount:
// Encode MatchLength
length = (src_p - src_anchor);
if (dst_p + (length >> 8) > dst_LASTLITERALS_1) return 0; // Check output limit
if (length >= ML_MASK)
{
dst[dst_token] += ML_MASK;
length -= ML_MASK;
for (; length > 509; length -= 510)
{
dst[dst_p++] = 255;
dst[dst_p++] = 255;
}
if (length > 254)
{
length -= 255;
dst[dst_p++] = 255;
}
dst[dst_p++] = (byte)length;
}
else
{
dst[dst_token] += (byte)length;
}
// Test end of chunk
if (src_p > src_mflimit)
{
src_anchor = src_p;
break;
}
// Fill table
hash_table[(((Peek4(src, src_p - 2)) * 2654435761u) >> HASH_ADJUST)] = (src_p - 2 - src_base);
// Test next position
h = (((Peek4(src, src_p)) * 2654435761u) >> HASH_ADJUST);
src_ref = src_base + hash_table[h];
hash_table[h] = (src_p - src_base);
if ((src_ref > src_p - (MAX_DISTANCE + 1)) && (Equal4(src, src_ref, src_p)))
{
dst_token = dst_p++;
dst[dst_token] = 0;
goto _next_match;
}
// Prepare next loop
src_anchor = src_p++;
h_fwd = (((Peek4(src, src_p)) * 2654435761u) >> HASH_ADJUST);
}
_last_literals:
// Encode Last Literals
{
var lastRun = (src_end - src_anchor);
if (dst_p + lastRun + 1 + ((lastRun + 255 - RUN_MASK) / 255) > dst_end) return 0;
if (lastRun >= RUN_MASK)
{
dst[dst_p++] = (RUN_MASK << ML_BITS);
lastRun -= RUN_MASK;
for (; lastRun > 254; lastRun -= 255) dst[dst_p++] = 255;
dst[dst_p++] = (byte)lastRun;
}
else dst[dst_p++] = (byte)(lastRun << ML_BITS);
BlockCopy(src, src_anchor, dst, dst_p, src_end - src_anchor);
dst_p += src_end - src_anchor;
}
// End
return ((dst_p) - dst_0);
}
}
#endregion
#region LZ4_compress64kCtx
private static int LZ4_compress64kCtx_safe32(
ushort[] hash_table,
byte[] src,
byte[] dst,
int src_0,
int dst_0,
int src_len,
int dst_maxlen)
{
unchecked
{
var debruijn32 = DEBRUIJN_TABLE_32;
int _i;
// ---- preprocessed source start here ----
// r93
var src_p = src_0;
var src_anchor = src_p;
var src_base = src_p;
var src_end = src_p + src_len;
var src_mflimit = src_end - MFLIMIT;
var dst_p = dst_0;
var dst_end = dst_p + dst_maxlen;
var src_LASTLITERALS = src_end - LASTLITERALS;
var src_LASTLITERALS_1 = src_LASTLITERALS - 1;
var src_LASTLITERALS_STEPSIZE_1 = src_LASTLITERALS - (STEPSIZE_32 - 1);
var dst_LASTLITERALS_1 = dst_end - (1 + LASTLITERALS);
var dst_LASTLITERALS_3 = dst_end - (2 + 1 + LASTLITERALS);
int len, length;
uint h, h_fwd;
// Init
if (src_len < MINLENGTH) goto _last_literals;
// First Byte
src_p++;
h_fwd = (((Peek4(src, src_p)) * 2654435761u) >> HASH64K_ADJUST);
// Main Loop
while (true)
{
var findMatchAttempts = (1 << SKIPSTRENGTH) + 3;
var src_p_fwd = src_p;
int src_ref;
int dst_token;
// Find a match
do
{
h = h_fwd;
var step = findMatchAttempts++ >> SKIPSTRENGTH;
src_p = src_p_fwd;
src_p_fwd = src_p + step;
if (src_p_fwd > src_mflimit) goto _last_literals;
h_fwd = (((Peek4(src, src_p_fwd)) * 2654435761u) >> HASH64K_ADJUST);
src_ref = src_base + hash_table[h];
hash_table[h] = (ushort)(src_p - src_base);
} while (!Equal4(src, src_ref, src_p));
// Catch up
while ((src_p > src_anchor) && (src_ref > src_0) && (src[src_p - 1] == src[src_ref - 1]))
{
src_p--;
src_ref--;
}
// Encode Literal length
length = (src_p - src_anchor);
dst_token = dst_p++;
if (dst_p + length + (length >> 8) > dst_LASTLITERALS_3) return 0; // Check output limit
if (length >= RUN_MASK)
{
len = length - RUN_MASK;
dst[dst_token] = (RUN_MASK << ML_BITS);
if (len > 254)
{
do
{
dst[dst_p++] = 255;
len -= 255;
} while (len > 254);
dst[dst_p++] = (byte)len;
BlockCopy(src, src_anchor, dst, dst_p, length);
dst_p += length;
goto _next_match;
}
else
{
dst[dst_p++] = (byte)len;
}
}
else
{
dst[dst_token] = (byte)(length << ML_BITS);
}
// Copy Literals
if (length > 0)
{
_i = dst_p + length;
WildCopy(src, src_anchor, dst, dst_p, _i);
dst_p = _i;
}
_next_match:
// Encode Offset
Poke2(dst, dst_p, (ushort)(src_p - src_ref));
dst_p += 2;
// Start Counting
src_p += MINMATCH;
src_ref += MINMATCH; // MinMatch verified
src_anchor = src_p;
while (src_p < src_LASTLITERALS_STEPSIZE_1)
{
var diff = (int)Xor4(src, src_ref, src_p);
if (diff == 0)
{
src_p += STEPSIZE_32;
src_ref += STEPSIZE_32;
continue;
}
src_p += debruijn32[((uint)((diff) & -(diff)) * 0x077CB531u) >> 27];
goto _endCount;
}
if ((src_p < src_LASTLITERALS_1) && (Equal2(src, src_ref, src_p)))
{
src_p += 2;
src_ref += 2;
}
if ((src_p < src_LASTLITERALS) && (src[src_ref] == src[src_p])) src_p++;
_endCount:
// Encode MatchLength
len = (src_p - src_anchor);
if (dst_p + (len >> 8) > dst_LASTLITERALS_1) return 0; // Check output limit
if (len >= ML_MASK)
{
dst[dst_token] += ML_MASK;
len -= ML_MASK;
for (; len > 509; len -= 510)
{
dst[dst_p++] = 255;
dst[dst_p++] = 255;
}
if (len > 254)
{
len -= 255;
dst[dst_p++] = 255;
}
dst[dst_p++] = (byte)len;
}
else
{
dst[dst_token] += (byte)len;
}
// Test end of chunk
if (src_p > src_mflimit)
{
src_anchor = src_p;
break;
}
// Fill table
hash_table[(((Peek4(src, src_p - 2)) * 2654435761u) >> HASH64K_ADJUST)] = (ushort)(src_p - 2 - src_base);
// Test next position
h = (((Peek4(src, src_p)) * 2654435761u) >> HASH64K_ADJUST);
src_ref = src_base + hash_table[h];
hash_table[h] = (ushort)(src_p - src_base);
if (Equal4(src, src_ref, src_p))
{
dst_token = dst_p++;
dst[dst_token] = 0;
goto _next_match;
}
// Prepare next loop
src_anchor = src_p++;
h_fwd = (((Peek4(src, src_p)) * 2654435761u) >> HASH64K_ADJUST);
}
_last_literals:
// Encode Last Literals
var lastRun = (src_end - src_anchor);
if (dst_p + lastRun + 1 + (lastRun - RUN_MASK + 255) / 255 > dst_end) return 0;
if (lastRun >= RUN_MASK)
{
dst[dst_p++] = (RUN_MASK << ML_BITS);
lastRun -= RUN_MASK;
for (; lastRun > 254; lastRun -= 255) dst[dst_p++] = 255;
dst[dst_p++] = (byte)lastRun;
}
else
{
dst[dst_p++] = (byte)(lastRun << ML_BITS);
}
BlockCopy(src, src_anchor, dst, dst_p, src_end - src_anchor);
dst_p += src_end - src_anchor;
// End
return ((dst_p) - dst_0);
}
}
#endregion
#region LZ4_uncompress
private static int LZ4_uncompress_safe32(
byte[] src,
byte[] dst,
int src_0,
int dst_0,
int dst_len)
{
unchecked
{
var dec32table = DECODER_TABLE_32;
int _i;
// ---- preprocessed source start here ----
// r93
var src_p = src_0;
int dst_ref;
var dst_p = dst_0;
var dst_end = dst_p + dst_len;
int dst_cpy;
var dst_LASTLITERALS = dst_end - LASTLITERALS;
var dst_COPYLENGTH = dst_end - COPYLENGTH;
var dst_COPYLENGTH_STEPSIZE_4 = dst_end - COPYLENGTH - (STEPSIZE_32 - 4);
byte token;
// Main Loop
while (true)
{
int length;
// get runlength
token = src[src_p++];
if ((length = (token >> ML_BITS)) == RUN_MASK)
{
int len;
for (; (len = src[src_p++]) == 255; length += 255)
{
/* do nothing */
}
length += len;
}
// copy literals
dst_cpy = dst_p + length;
if (dst_cpy > dst_COPYLENGTH)
{
if (dst_cpy != dst_end) goto _output_error; // Error : not enough place for another match (min 4) + 5 literals
BlockCopy(src, src_p, dst, dst_p, length);
src_p += length;
break; // EOF
}
if (dst_p < dst_cpy)
{
_i = WildCopy(src, src_p, dst, dst_p, dst_cpy);
src_p += _i;
dst_p += _i;
}
src_p -= (dst_p - dst_cpy);
dst_p = dst_cpy;
// get offset
dst_ref = (dst_cpy) - Peek2(src, src_p);
src_p += 2;
if (dst_ref < dst_0) goto _output_error; // Error : offset outside destination buffer
// get matchlength
if ((length = (token & ML_MASK)) == ML_MASK)
{
for (; src[src_p] == 255; length += 255) src_p++;
length += src[src_p++];
}
// copy repeated sequence
if ((dst_p - dst_ref) < STEPSIZE_32)
{
const int dec64 = 0;
dst[dst_p + 0] = dst[dst_ref + 0];
dst[dst_p + 1] = dst[dst_ref + 1];
dst[dst_p + 2] = dst[dst_ref + 2];
dst[dst_p + 3] = dst[dst_ref + 3];
dst_p += 4;
dst_ref += 4;
dst_ref -= dec32table[dst_p - dst_ref];
Copy4(dst, dst_ref, dst_p);
dst_p += STEPSIZE_32 - 4;
dst_ref -= dec64;
}
else
{
Copy4(dst, dst_ref, dst_p);
dst_p += 4;
dst_ref += 4;
}
dst_cpy = dst_p + length - (STEPSIZE_32 - 4);
if (dst_cpy > dst_COPYLENGTH_STEPSIZE_4)
{
if (dst_cpy > dst_LASTLITERALS) goto _output_error; // Error : last 5 bytes must be literals
if (dst_p < dst_COPYLENGTH)
{
_i = SecureCopy(dst, dst_ref, dst_p, dst_COPYLENGTH);
dst_ref += _i;
dst_p += _i;
}
while (dst_p < dst_cpy) dst[dst_p++] = dst[dst_ref++];
dst_p = dst_cpy;
continue;
}
if (dst_p < dst_cpy)
{
SecureCopy(dst, dst_ref, dst_p, dst_cpy);
}
dst_p = dst_cpy; // correction
}
// end of decoding
return ((src_p) - src_0);
// write overflow error detected
_output_error:
return (-((src_p) - src_0));
}
}
#endregion
}
}
// ReSharper restore RedundantIfElseBlock
// ReSharper restore JoinDeclarationAndInitializer
// ReSharper restore TooWideLocalVariableScope
// ReSharper restore InconsistentNaming
// ReSharper restore CheckNamespace