From e0266badf098a5cec2512eb693bca771e35fd3ab Mon Sep 17 00:00:00 2001
From: Mikko Rasa <tdb@tdb.fi>
Date: Sat, 5 Jan 2013 11:39:24 +0200
Subject: [PATCH] Add a constructor to ZlibCompressed that takes a mode
 parameter

---
 source/io/zlibcompressed.cpp | 28 +++++++++++++++++++++-------
 source/io/zlibcompressed.h   |  8 ++++++++
 2 files changed, 29 insertions(+), 7 deletions(-)

diff --git a/source/io/zlibcompressed.cpp b/source/io/zlibcompressed.cpp
index 90b54a2..a558853 100644
--- a/source/io/zlibcompressed.cpp
+++ b/source/io/zlibcompressed.cpp
@@ -38,18 +38,32 @@ ZlibCompressed::Private::Private()
 
 
 ZlibCompressed::ZlibCompressed(Base &b, unsigned level):
-	below(b),
-	buffer_size(1024),
-	in_buffer(0),
-	out_buffer(0),
-	stream_end(false),
-	priv(0)
+	below(b)
 {
-#ifdef WITH_ZLIB
 	mode = below.get_mode()&M_RDWR;
 	if(mode!=M_READ && mode!=M_WRITE)
 		throw invalid_access(mode);
 
+	init(level);
+}
+
+ZlibCompressed::ZlibCompressed(Base &b, Mode m, unsigned level):
+	below(b)
+{
+	mode = m&below.get_mode()&M_RDWR;
+	if(mode!=M_READ && mode!=M_WRITE)
+		throw invalid_access(m);
+
+	init(level);
+}
+
+void ZlibCompressed::init(unsigned level)
+{
+#ifdef WITH_ZLIB
+	buffer_size = 1024;
+	in_buffer = 0;
+	out_buffer = 0;
+	stream_end = false;
 	priv = new Private;
 
 	if(mode==M_WRITE)
diff --git a/source/io/zlibcompressed.h b/source/io/zlibcompressed.h
index fa7a153..30894cb 100644
--- a/source/io/zlibcompressed.h
+++ b/source/io/zlibcompressed.h
@@ -46,6 +46,14 @@ public:
 	compression quality, ranging from 1 (fastest) to 9 (best compression). */
 	ZlibCompressed(Base &, unsigned level = 9);
 
+	/** Creates a zlib de/compression object.  Mode must be either read or
+	write, and compatible with the underlying object. */
+	ZlibCompressed(Base &, Mode, unsigned level = 9);
+
+private:
+	void init(unsigned);
+
+public:
 	virtual ~ZlibCompressed();
 
 	void flush();
-- 
2.45.2