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/*=========================================================================
*
* Copyright NumFOCUS
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* https://www.apache.org/licenses/LICENSE-2.0.txt
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*=========================================================================*/
#ifndef itkFileTools_h
#define itkFileTools_h
#include <string>
namespace itk
{
/**
* \class FileTools
* \brief This is a helper class to provide file/directory manipulations such as file creation, directory creation, etc.
* \ingroup ITKIOXML
*/
class FileTools
{
public:
/** Helper function to create the directory, if it does not exist. */
static void
CreateDirectory(const std::string & dir);
/** Function to create a file, if it does not exist. */
static void
CreateFile(const std::string & fn);
};
} // namespace itk
// here comes the implementation
#include "itksys/SystemTools.hxx"
#include "itkMacro.h"
namespace itk
{
/** Helper function to create the directory, if it does not exist. */
inline void
FileTools::CreateDirectory(const std::string & dir)
{
if (dir.empty() || itksys::SystemTools::FileExists(dir.c_str(), true))
{
ExceptionObject eo(__FILE__, __LINE__, "directory cannot be created");
throw eo;
}
// do nothing if it already exists
if (dir.empty() || "." == dir || itksys::SystemTools::FileIsDirectory(dir.c_str()))
{
return;
}
// create it
itksys::SystemTools::MakeDirectory(dir.c_str());
// check successful or not
if (!itksys::SystemTools::FileIsDirectory(dir.c_str()))
{
ExceptionObject eo(__FILE__, __LINE__, "directory cannot be created");
throw eo;
}
}
/** Helper function to create a file, if it does not exist. */
inline void
FileTools::CreateFile(const std::string & fn)
{
if (fn.empty() || itksys::SystemTools::FileIsDirectory(fn.c_str()))
{
ExceptionObject eo(__FILE__, __LINE__, "file cannot be created");
throw eo;
}
// do nothing if it already exists
if (itksys::SystemTools::FileExists(fn.c_str(), true))
{
return;
}
// make sure the directory exists
std::string dir = itksys::SystemTools::GetFilenamePath(fn.c_str());
FileTools::CreateDirectory(dir);
// create the file
itksys::SystemTools::Touch(fn.c_str(), true);
// check successful or not
if (!itksys::SystemTools::FileExists(fn.c_str(), true))
{
ExceptionObject eo(__FILE__, __LINE__, "file cannot be created");
throw eo;
}
}
} // namespace itk
#endif // itkFileTools_h
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