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-rw-r--r--modules/libjar/zipwriter/nsDeflateConverter.h59
1 files changed, 59 insertions, 0 deletions
diff --git a/modules/libjar/zipwriter/nsDeflateConverter.h b/modules/libjar/zipwriter/nsDeflateConverter.h
new file mode 100644
index 0000000000..1728038abb
--- /dev/null
+++ b/modules/libjar/zipwriter/nsDeflateConverter.h
@@ -0,0 +1,59 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+#ifndef _nsDeflateConverter_h_
+#define _nsDeflateConverter_h_
+
+#include "nsIStreamConverter.h"
+#include "nsCOMPtr.h"
+#include "nsIThreadRetargetableStreamListener.h"
+#include "zlib.h"
+#include "mozilla/Attributes.h"
+
+#define DEFLATECONVERTER_CID \
+ { \
+ 0x461cd5dd, 0x73c6, 0x47a4, { \
+ 0x8c, 0xc3, 0x60, 0x3b, 0x37, 0xd8, 0x4a, 0x61 \
+ } \
+ }
+
+class nsDeflateConverter final : public nsIStreamConverter {
+ public:
+ static constexpr size_t kZipBufLen = (4 * 1024 - 1);
+
+ NS_DECL_ISUPPORTS
+ NS_DECL_NSIREQUESTOBSERVER
+ NS_DECL_NSISTREAMLISTENER
+ NS_DECL_NSITHREADRETARGETABLESTREAMLISTENER
+ NS_DECL_NSISTREAMCONVERTER
+
+ nsDeflateConverter() : mWrapMode(WRAP_NONE), mOffset(0), mZstream() {
+ // 6 is Z_DEFAULT_COMPRESSION but we need the actual value
+ mLevel = 6;
+ }
+
+ explicit nsDeflateConverter(int32_t level)
+ : mWrapMode(WRAP_NONE), mOffset(0), mZstream() {
+ mLevel = level;
+ }
+
+ private:
+ ~nsDeflateConverter() {}
+
+ enum WrapMode { WRAP_ZLIB, WRAP_GZIP, WRAP_NONE };
+
+ WrapMode mWrapMode;
+ uint64_t mOffset;
+ int32_t mLevel;
+ nsCOMPtr<nsIStreamListener> mListener;
+ nsCOMPtr<nsISupports> mContext;
+ z_stream mZstream;
+ unsigned char mWriteBuffer[kZipBufLen];
+
+ nsresult Init();
+ nsresult PushAvailableData(nsIRequest* aRequest);
+};
+
+#endif