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PackageEntry.HashFilename avoids stream reads .

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Operate directly on the array to avoid overhead of stream reads.
This commit is contained in:
RoosterDragon
2020-10-18 15:24:47 +01:00
committed by abcdefg30
parent 6eaf51d450
commit 466de89e17
1 changed files with 8 additions and 8 deletions
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14
OpenRA.Mods.Cnc/FileSystem/PackageEntry.cs
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@@ -65,17 +65,17 @@ namespace OpenRA.Mods.Cnc.FileSystem
if (name.Length % 4 != 0) if (name.Length % 4 != 0)
name = name.PadRight(name.Length + (4 - name.Length % 4), '\0'); name = name.PadRight(name.Length + (4 - name.Length % 4), '\0');
using (var ms = new MemoryStream(Encoding.ASCII.GetBytes(name))) var result = 0u;
var data = Encoding.ASCII.GetBytes(name);
var i = 0;
while (i < data.Length)
{ {
var len = name.Length >> 2; var next = (uint)(data[i++] | data[i++] << 8 | data[i++] << 16 | data[i++] << 24);
uint result = 0; result = ((result << 1) | (result >> 31)) + next;
}
while (len-- != 0)
result = ((result << 1) | (result >> 31)) + ms.ReadUInt32();
return result; return result;
} }
}
case PackageHashType.CRC32: case PackageHashType.CRC32:
{ {