COMMON: Added debug method for printing out stream contents

2 files changed, 22 insertions, 0 deletions

diff --git a/common/stream.cpp b/common/stream.cpp
index a8446a9086..08774312fd 100644
--- a/common/stream.cpp
+++ b/common/stream.cpp
@@ -247,6 +247,19 @@ uint32 SafeSeekableSubReadStream::read(void *dataPtr, uint32 dataSize) {
 	return SeekableSubReadStream::read(dataPtr, dataSize);
 }
 
+void SeekableReadStream::hexdump(int len, int bytesPerLine, int startOffset) {
+	uint pos_ = pos();
+	uint size_ = size();
+	uint toRead = MIN<uint>(len + startOffset, size_ - pos_);
+	byte *data = (byte *)calloc(toRead, 1);
+
+	read(data, toRead);
+	Common::hexdump(data, toRead, bytesPerLine, startOffset);
+
+	free(data);
+
+	seek(pos_);
+}
 
 #pragma mark -
 
diff --git a/common/stream.h b/common/stream.h
index e0ffc47d7f..30107720dc 100644
--- a/common/stream.h
+++ b/common/stream.h
@@ -514,6 +514,15 @@ public:
 	 * err() or eos() to determine whether an exception occurred.
 	 */
 	virtual String readLine();
+
+	/**
+	 * Print a hexdump of the stream while maintaing position. The number
+	 * of bytes per line is customizable.
+	 * @param len	the length of that data
+	 * @param bytesPerLine	number of bytes to print per line (default: 16)
+	 * @param startOffset	shift the shown offsets by the starting offset (default: 0)
+	 */
+	void hexdump(int len, int bytesPerLine = 16, int startOffset = 0);
 };
 
 /**