SabreTools/SabreTools.Hashing
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Rename accumulator so I don't keep losing track

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This commit is contained in:
Matt Nadareski
2024-11-08 00:28:51 -05:00
parent 41be02c57d
commit 5ed7ad7802
1 changed files with 18 additions and 18 deletions
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36
SabreTools.Hashing/XxHash/XXH32State.cs
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@@ -23,7 +23,7 @@ namespace SabreTools.Hashing.XxHash
/// <summary>
/// Accumulator lanes
/// </summary>
private readonly uint[] _v = new uint[4];
private readonly uint[] _acc = new uint[4];
/// <summary>
/// Internal buffer for partial reads. Treated as unsigned char[16].
@@ -44,10 +44,10 @@ namespace SabreTools.Hashing.XxHash
_totalLen32 = 0;
_largeLen = 0;
_v[0] = seed + XXH_PRIME32_1 + XXH_PRIME32_2;
_v[1] = seed + XXH_PRIME32_2;
_v[2] = seed + 0;
_v[3] = seed - XXH_PRIME32_1;
_acc[0] = seed + XXH_PRIME32_1 + XXH_PRIME32_2;
_acc[1] = seed + XXH_PRIME32_2;
_acc[2] = seed + 0;
_acc[3] = seed - XXH_PRIME32_1;
for (int i = 0; i < _mem32.Length; i++)
{
@@ -84,10 +84,10 @@ namespace SabreTools.Hashing.XxHash
Array.Copy(data, offset, _mem32, _memsize, 16 - _memsize);
int p32 = 0;
_v[0] = Round(_v[0], ReadLE32(_mem32, p32)); p32 += 4;
_v[1] = Round(_v[1], ReadLE32(_mem32, p32)); p32 += 4;
_v[2] = Round(_v[2], ReadLE32(_mem32, p32)); p32 += 4;
_v[3] = Round(_v[3], ReadLE32(_mem32, p32));
_acc[0] = Round(_acc[0], ReadLE32(_mem32, p32)); p32 += 4;
_acc[1] = Round(_acc[1], ReadLE32(_mem32, p32)); p32 += 4;
_acc[2] = Round(_acc[2], ReadLE32(_mem32, p32)); p32 += 4;
_acc[3] = Round(_acc[3], ReadLE32(_mem32, p32));
offset += 16 - _memsize;
_memsize = 0;
@@ -98,10 +98,10 @@ namespace SabreTools.Hashing.XxHash
int limit = bEnd - 16;
do
{
_v[0] = Round(_v[0], ReadLE32(data, offset)); offset += 4;
_v[1] = Round(_v[1], ReadLE32(data, offset)); offset += 4;
_v[2] = Round(_v[2], ReadLE32(data, offset)); offset += 4;
_v[3] = Round(_v[3], ReadLE32(data, offset)); offset += 4;
_acc[0] = Round(_acc[0], ReadLE32(data, offset)); offset += 4;
_acc[1] = Round(_acc[1], ReadLE32(data, offset)); offset += 4;
_acc[2] = Round(_acc[2], ReadLE32(data, offset)); offset += 4;
_acc[3] = Round(_acc[3], ReadLE32(data, offset)); offset += 4;
} while (offset <= limit);
}
@@ -122,14 +122,14 @@ namespace SabreTools.Hashing.XxHash
if (_largeLen > 0)
{
h32 = RotateLeft32(_v[0], 1)
+ RotateLeft32(_v[1], 7)
+ RotateLeft32(_v[2], 12)
+ RotateLeft32(_v[3], 18);
h32 = RotateLeft32(_acc[0], 1)
+ RotateLeft32(_acc[1], 7)
+ RotateLeft32(_acc[2], 12)
+ RotateLeft32(_acc[3], 18);
}
else
{
h32 = _v[2] /* == seed */ + XXH_PRIME32_5;
h32 = _acc[2] /* == seed */ + XXH_PRIME32_5;
}
h32 += _totalLen32;