Moved MemoryStreamEndian from Saga to Common.

svn-id: r29038

1 files changed, 29 insertions, 0 deletions

diff --git a/common/stream.h b/common/stream.h
index d7d96f3605..deb018aad5 100644
--- a/common/stream.h
+++ b/common/stream.h
@@ -402,6 +402,35 @@ public:
 	void seek(int32 offs, int whence = SEEK_SET);
 };
 
+
+/**
+ * This is a wrapper around MemoryReadStream, but it adds non-endian
+ * read methods whose endianness is set on the stream creation.
+ */
+class MemoryReadStreamEndian : public Common::MemoryReadStream {
+private:
+public:
+	bool _bigEndian;
+	MemoryReadStreamEndian(const byte *buf, uint32 len, bool bigEndian = false) : MemoryReadStream(buf, len), _bigEndian(bigEndian) {}
+
+	uint16 readUint16() {
+		return (_bigEndian) ? readUint16BE(): readUint16LE();
+	}
+
+	uint32 readUint32() {
+		return (_bigEndian) ? readUint32BE(): readUint32LE();
+	}
+
+	inline int16 readSint16() {
+		return (int16)readUint16();
+	}
+
+
+	inline int32 readSint32() {
+		return (int32)readUint32();
+	}
+};
+
 /**
  * Simple memory based 'stream', which implements the WriteStream interface for
  * a plain memory block.