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流式计算 MurmurHash2 #6635

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Glavo wants to merge 4 commits into from
+312 −313
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流式计算 MurmurHash2 #6635

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e7596d7
refactor: remove unused string hash methods from MurmurHash2
Glavo Aug 9, 2026
ae99b7e
refactor: update MurmurHash2 to implement Checksum interface and opti…
Glavo Aug 9, 2026
8d156ab
refactor: update MurmurHash2 to implement Checksum interface and opti…
Glavo Aug 9, 2026
93db810
Implement the MurmurHash2 32-bit checksum variant
Glavo Aug 9, 2026
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18 changes: 11 additions & 7 deletions ...re/src/main/java/org/jackhuang/hmcl/addon/repository/CurseForgeRemoteAddonRepository.java
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Original file line number Diff line number Diff line change
Expand Up @@ -33,7 +33,6 @@
import org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Nullable;

import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.net.URI;
Expand Down Expand Up @@ -207,21 +206,26 @@ public SearchResult search(DownloadProvider downloadProvider, String gameVersion

@Override
public Optional<RemoteAddon.Version> getRemoteVersionByLocalFile(Path file) throws IOException {
ByteArrayOutputStream baos = new ByteArrayOutputStream();
var murmur = new MurmurHash2(1);
try (InputStream stream = Files.newInputStream(file)) {
byte[] buf = new byte[1024];
byte[] input = new byte[1024];
byte[] hashBuffer = new byte[1024];
int len;
while ((len = stream.read(buf, 0, buf.length)) != -1) {
while ((len = stream.read(input, 0, input.length)) > 0) {
int hashBufferLen = 0;

for (int i = 0; i < len; i++) {
byte b = buf[i];
byte b = input[i];
if (b != 0x9 && b != 0xa && b != 0xd && b != 0x20) {
baos.write(b);
hashBuffer[hashBufferLen++] = b;
}
}

murmur.update(hashBuffer, 0, hashBufferLen);
}
}

long hash = Integer.toUnsignedLong(MurmurHash2.hash32(baos.toByteArray(), baos.size(), 1));
long hash = murmur.getValue();
if (hash == 811513880) { // Workaround for https://github.com/HMCL-dev/HMCL/issues/4597
return Optional.empty();
}
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