Java Foreign Linker + jextract

snappy_compress.java

import java.lang.foreign.Arena;
import java.lang.foreign.MemorySegment;

import static io.airlift.slice.Preconditions.verify;
import static io.airlift.slice.snappy.snappy_c_h.SNAPPY_OK;
import static java.lang.foreign.ValueLayout.JAVA_CHAR;
import static java.lang.foreign.ValueLayout.JAVA_LONG;

public class SnappyTest
{
    public static void main(String[] args) throws Throwable
    {
        try (var arena = Arena.openConfined()) {
            String data = "Hello World!".repeat(10000 / 15);
            long length = data.length() + 1;

            long maxCompressedSize = snappy_max_compressed_length(length);
            MemorySegment input = arena.allocate(length);
            input.setUtf8String(0, data);

            MemorySegment output = arena.allocate(maxCompressedSize);
            MemorySegment retSize = arena.allocate(JAVA_LONG, maxCompressedSize);

            if (snappy_compress(input, input.byteSize(), output, retSize) == SNAPPY_OK()) {
                long actualCompressedSize = retSize.get(JAVA_LONG, 0);
                MemorySegment compressedData = output.asSlice(0, actualCompressedSize);

                if (snappy_uncompressed_length(compressedData, compressedData.byteSize(), retSize) == SNAPPY_OK()) {
                    long actualUncompressedSize = retSize.get(JAVA_LONG, 0);
                    verify(actualUncompressedSize == length);

                    MemorySegment uncompressedOutput = arena.allocate(actualUncompressedSize);
                    if (snappy_uncompress(compressedData, compressedData.byteSize(), uncompressedOutput, retSize) == SNAPPY_OK()) {
                        verify(uncompressedOutput.getUtf8String(0).equals(data));
                    }
                }
            }
        }
    }
}

Generating API from c header file using https://jdk.java.net/jextract/:

./bin/jextract --source --output target -l libsnappy -I/opt/homebrew/include -I/Library/Developer/CommandLineTools/Library\ SDKs/MacOSX.sdk/usr/include /opt/homebrew/include/snappy-c.h