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/*=========================================================================
Program: Insight Segmentation & Registration Toolkit
Module: $RCSfile$
Language: C++
Date: $Date$
Version: $Revision$
Copyright (c) 2002 Insight Consortium. All rights reserved.
See ITKCopyright.txt or http://www.itk.org/HTML/Copyright.htm for details.
This software is distributed WITHOUT ANY WARRANTY; without even
the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
PURPOSE. See the above copyright notices for more information.
=========================================================================*/
#include "cmListFileCache.h"
#include "cmSystemTools.h"
cmListFileCache* cmListFileCache::Instance = 0;
cmListFileCache* cmListFileCache::GetInstance()
{
if(!cmListFileCache::Instance)
{
cmListFileCache::Instance = new cmListFileCache;
}
return cmListFileCache::Instance;
}
void cmListFileCache::ClearCache()
{
delete cmListFileCache::Instance;
cmListFileCache::Instance = 0;
}
cmListFile* cmListFileCache::GetFileCache(const char* path)
{
ListFileMap::iterator sl = m_ListFileCache.find(path);
if (sl == m_ListFileCache.end())
{
// if not already in the map, then parse and store the
// file
if(!this->CacheFile(path))
{
return 0;
}
sl = m_ListFileCache.find(path);
if (sl == m_ListFileCache.end())
{
cmSystemTools::Error("Fatal error, in cmListFileCache CacheFile failed",
path);
return 0;
}
}
cmListFile& ret = sl->second;
if(cmSystemTools::ModifiedTime(path) > ret.m_ModifiedTime )
{
if(!this->CacheFile(path))
{
return 0;
}
else
{
sl = m_ListFileCache.find(path);
return &sl->second;
}
}
return &ret;
}
bool cmListFileCache::CacheFile(const char* path)
{
if(!cmSystemTools::FileExists(path))
{
return false;
}
std::ifstream fin(path);
if(!fin)
{
cmSystemTools::Error("cmListFileCache: error can not open file ", path);
return false;
}
cmListFile inFile;
inFile.m_ModifiedTime = cmSystemTools::ModifiedTime(path);
bool parseError;
while ( fin )
{
cmListFileFunction inFunction;
if(cmSystemTools::ParseFunction(fin,
inFunction.m_Name,
inFunction.m_Arguments,
path, parseError))
{
inFile.m_Functions.push_back(inFunction);
}
if (parseError)
{
inFile.m_ModifiedTime = 0;
}
}
m_ListFileCache[path] = inFile;
return true;
}
void cmListFileCache::FlushCache(const char* path)
{
ListFileMap::iterator it = m_ListFileCache.find(path);
if ( it != m_ListFileCache.end() )
{
m_ListFileCache.erase(it);
return;
}
}
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