1 files changed, 54 insertions, 0 deletions
diff --git a/cpp/src/IceGrid/FileCache.cpp b/cpp/src/IceGrid/FileCache.cpp
new file mode 100644
index 00000000000..71087e0e899
--- /dev/null
+++ b/cpp/src/IceGrid/FileCache.cpp
@@ -0,0 +1,54 @@
+// **********************************************************************
+//
+// Copyright (c) 2003-2006 ZeroC, Inc. All rights reserved.
+//
+// This copy of Ice is licensed to you under the terms described in the
+// ICE_LICENSE file included in this distribution.
+//
+// **********************************************************************
+
+#include <IceGrid/FileCache.h>
+#include <IceGrid/Exception.h>
+
+#include <fstream>
+
+using namespace std;
+using namespace IceGrid;
+
+FileCache::FileCache()
+{
+}
+
+Ice::StringSeq
+FileCache::read(const string& filename, Ice::Long offset, int count, Ice::Long& newOffset)
+{
+    ifstream is(filename.c_str());
+    if(is.fail())
+    {
+	throw FileNotAvailableException("failed to open file `" + filename + "'");
+    }
+
+    newOffset = offset;
+    is.seekg(0, ios::end);
+    if(offset >= is.tellg())
+    {
+	newOffset = is.tellg();
+	return Ice::StringSeq();
+    }
+
+    is.seekg(offset);
+    Ice::StringSeq lines;
+    for(int i = 0; i < count && is.good(); ++i)
+    {
+	assert(!is.eof());
+	string line;
+	getline(is, line);
+	if(!is.fail())
+	{
+	    newOffset = is.tellg();
+	    assert(newOffset >= 0);
+	}
+	lines.push_back(line);
+    }
+    return lines;
+}