1 files changed, 46 insertions, 0 deletions
diff --git a/Tools/compareTraces/TraceReader.cpp b/Tools/compareTraces/TraceReader.cpp
new file mode 100644
index 0000000..b4b9681
--- /dev/null
+++ b/Tools/compareTraces/TraceReader.cpp
@@ -0,0 +1,46 @@
+#include "stdafx.h"
+#include "TraceReader.h"
+using namespace Tracing;
+
+const sTraceItem& TraceReader::operator[]( size_t idx ) const
+{
+	if( idx >= countItems )
+		throw E_BOUNDS;
+	return items[ idx ];
+}
+
+CStringA TraceReader::getName( const sTraceItem& item ) const
+{
+	const size_t idx = item.stringIndex;
+	if( idx >= countStrings )
+		throw E_BOUNDS;
+	const char* const source = stringData + stringIndex[ idx ];
+	CStringA res;
+	res.Format( source, item.formatArgs[ 0 ], item.formatArgs[ 1 ], item.formatArgs[ 2 ], item.formatArgs[ 3 ] );
+	return res;
+}
+
+HRESULT TraceReader::open( LPCTSTR path )
+{
+	CHECK( file.Create( path, GENERIC_READ, FILE_SHARE_READ, OPEN_EXISTING ) );
+	CHECK( mapping.MapFile( file ) );
+
+	const uint8_t* rsi = mapping;
+	const sFileHeader& header = *(const sFileHeader*)rsi;
+	if( header.magic != header.correctMagic )
+		return E_INVALIDARG;
+	countItems = header.countItems;
+	countStrings = header.countStrings;
+
+	rsi += sizeof( sFileHeader );
+	payloadPointer = rsi;
+
+	rsi += header.bytesPayload;
+	stringIndex = (const uint32_t*)( rsi );
+	stringData = (const char*)( rsi + countStrings * 4 );
+
+	rsi += header.bytesStrings;
+	items = (const sTraceItem*)rsi;
+
+	return S_OK;
+}
+\ No newline at end of file