1 files changed, 97 insertions, 0 deletions
diff --git a/src/streams-zlib.h b/src/streams-zlib.h
new file mode 100644
index 000000000..6ab7405d1
--- /dev/null
+++ b/src/streams-zlib.h
@@ -0,0 +1,97 @@
+/*
+ * IO layer : zlib streambuf
+ *
+ * Authors:
+ *   Johan Ceuppens <jceuppen at easynet dot be>
+ *
+ * Copyright (C) 2004 Johan Ceuppens
+ *
+ * Released under GNU LGPL, read the file 'COPYING.LIB' for more information
+ */
+
+#ifndef __STREAMS_ZLIB_H_
+#define __STREAMS_ZLIB_H_
+
+#include "streams-handles.h"
+
+#include <glib/gtypes.h>
+#include <glib/garray.h>
+#include <zlib.h>
+#include <iostream>
+
+namespace Inkscape {
+
+class ZlibBufferException : public std::exception {};
+
+// This is the initial buffersize for the stream and
+// zipbuffers (the streambuffers expand as needed).
+const unsigned int BUFSIZE_STREAM = 4096; 
+
+/**
+ * ZlibBuffer
+ */ 
+
+//TODO: unbuffered IO
+class ZlibBuffer : public std::streambuf
+{
+public:
+
+    ZlibBuffer(URIHandle& urih);
+    virtual ~ZlibBuffer() {}
+    
+protected:
+
+    virtual int allocate_buffers();
+    virtual int reallocate_buffers(int new_getsize, int new_putsize);
+    virtual int underflow();
+    virtual int overflow(int c = EOF);
+    virtual int flush_output();
+
+    virtual void init_inflation() throw(ZlibBufferException);
+    virtual void reset_inflation() throw(ZlibBufferException);
+    virtual int consume_and_inflate();
+    virtual int do_consume_and_inflate(int nbytes);
+    virtual int consume(guint8 *buf, int nbytes);
+    virtual int do_consume(guint8 *buf, int nbytes);
+    virtual GByteArray *inflate(guint8 *in_buffer, int nbytes);
+    virtual GByteArray *do_inflate(guint8 *in_buffer, int nbytes);
+    virtual int copy_to_get(guint8 *data, int nbytes);
+    virtual int do_copy_to_get(guint8 *data, int nbytes);
+
+    URIHandle *_urihandle;
+
+private:
+
+    ZlibBuffer& operator=(ZlibBuffer const& rhs);
+    ZlibBuffer(ZlibBuffer const& rhs);
+
+    z_stream _zs;
+    int _putsize, _getsize;//sizes of in and out buffers
+    
+};
+
+class izstream : public std::istream {
+public:
+
+    explicit izstream(std::streambuf& sb) : std::istream(&sb) {}
+    ~izstream() { std::ios::init(0); }
+    
+    std::streambuf *rdbuf() { return std::ios::rdbuf(); }
+    std::streambuf *operator ->() { return rdbuf(); }
+
+};
+
+}
+
+#endif
+
+/*
+  Local Variables:
+  mode:c++
+  c-file-style:"stroustrup"
+  c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
+  indent-tabs-mode:nil
+  fill-column:99
+  End:
+*/
+// vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99 :