1 files changed, 93 insertions, 0 deletions
diff --git a/hwpfilter/source/hgzip.h b/hwpfilter/source/hgzip.h
new file mode 100644
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+++ b/hwpfilter/source/hgzip.h
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+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * 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/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#ifndef INCLUDED_HWPFILTER_SOURCE_HGZIP_H
+#define INCLUDED_HWPFILTER_SOURCE_HGZIP_H
+
+#include <zlib.h>
+
+class HStream;
+/**
+ * @short Structure for using z_stream
+ */
+struct gz_stream
+{
+    z_stream stream;
+/**
+ * The error code of z_stream operation
+ */
+    int      z_err;
+/**
+ * EOF of the input file
+ */
+    int      z_eof;
+/**
+ * Stream
+ */
+    HStream*     _inputstream;
+/**
+ * Input buffer
+ */
+    Byte     *inbuf;
+/**
+ * Crc32 of uncompressed data
+ */
+    uLong    crc;
+/**
+ * Stream
+ */
+    char     *msg;
+/**
+ * 'w' or 'r'
+ */
+    char     mode;
+};
+
+/**
+ *  Opens a gzipped stream for reading.
+ *    gz_open returns NULL if the stream could not be opened or if there was
+ *  insufficient memory to allocate the (de)compression state; errno
+ *  can be checked to distinguish the two cases (if errno is zero, the
+ *  zlib error is Z_MEM_ERROR).
+ * @param _stream Reference of stream object having binary data.
+ */
+gz_stream   *gz_open    ( HStream& _stream );
+/**
+ * Flushes all pending output if necessary, closes the compressed stream
+ * and deallocates all the (de)compression state
+ */
+int     gz_close    ( gz_stream *file );
+/**
+ * Reads the given number of uncompressed bytes from the compressed stream
+ * @param file Gzipped stream
+ * @param buf Buffer to have the data to be read
+ * @param len Length of data to be read
+ * @returns The number of bytes actually read
+ */
+size_t     gz_read     ( gz_stream *file, voidp  buf, unsigned len );
+/**
+ * Flushes all pending output into the compressed file
+ * gz_flush should be called only when strictly necessary because it can
+ * degrade compression
+ * @param flush Is as in the deflate() function
+ */
+int     gz_flush    ( gz_stream *file, int flush );
+#endif // INCLUDED_HWPFILTER_SOURCE_HGZIP_H
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */