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// **********************************************************************
//
// 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;
}
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