Merge branch 'master' into copilot/fix-gzip-extract-not-supported-exception

src/SharpCompress/Common/SevenZip/SevenZipFilePart.cs

@@ -67,6 +67,7 @@ internal class SevenZipFilePart : FilePart
         }
     }
 
+    private const uint K_COPY = 0x0;
     private const uint K_LZMA2 = 0x21;
     private const uint K_LZMA = 0x030101;
     private const uint K_PPMD = 0x030401;
@@ -82,6 +83,7 @@ internal class SevenZipFilePart : FilePart
         var coder = Folder.NotNull()._coders.First();
         return coder._methodId._id switch
         {
+            K_COPY => CompressionType.None,
             K_LZMA or K_LZMA2 => CompressionType.LZMA,
             K_PPMD => CompressionType.PPMd,
             K_B_ZIP2 => CompressionType.BZip2,

tests/SharpCompress.Test/SevenZip/SevenZipArchiveTests.cs

@@ -122,6 +122,25 @@ public class SevenZipArchiveTests : ArchiveTests
     //"7Zip.BZip2.split.006",
     //"7Zip.BZip2.split.007"
 
+    [Fact]
+    public void SevenZipArchive_Copy_StreamRead() => ArchiveStreamRead("7Zip.Copy.7z");
+
+    [Fact]
+    public void SevenZipArchive_Copy_PathRead() => ArchiveFileRead("7Zip.Copy.7z");
+
+    [Fact]
+    public void SevenZipArchive_Copy_CompressionType()
+    {
+        using (Stream stream = File.OpenRead(Path.Combine(TEST_ARCHIVES_PATH, "7Zip.Copy.7z")))
+        using (var archive = SevenZipArchive.Open(stream))
+        {
+            foreach (var entry in archive.Entries.Where(e => !e.IsDirectory))
+            {
+                Assert.Equal(CompressionType.None, entry.CompressionType);
+            }
+        }
+    }
+
     [Fact]
     public void SevenZipArchive_ZSTD_StreamRead() => ArchiveStreamRead("7Zip.ZSTD.7z");