wmiointerface.h

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#ifndef WMIOINTERFACE_H
#define WMIOINTERFACE_H
 
// STL includes
#include <string>
#include <fstream>
#include <cmath>
 
namespace WmIOInterface
{
 
inline bool fileExists(const std::string& filename)
{
    std::ifstream file(filename.c_str());
    const bool exists = bool(file);
    file.close();
    return exists;
}
 
inline int scanForFileIndexWithPrefixSuffix(const std::string& prefix,
                                            const std::string& suffix,
                                            const int startIndex,
                                            const int endIndex)
{
    // start scanning from the back
    for (int i = endIndex; i >= startIndex; --i)
    {
        std::stringstream ss;
        ss << prefix << i << suffix;
        if (fileExists(ss.str()))
        {
            return i;
        }
    }
    return std::min(startIndex, endIndex) - 1;
}
 
inline std::string scanForFileWithPrefixSuffix(const std::string& prefix,
                                               const std::string& suffix,
                                               const int startIndex,
                                               const int endIndex)
{
    const int possibleIndex =
        scanForFileIndexWithPrefixSuffix(prefix, suffix, startIndex, endIndex);
    if (possibleIndex == std::min(startIndex, endIndex) - 1)
    {
        return std::string();
    }
    std::stringstream ss;
    ss << prefix << possibleIndex << suffix;
    return ss.str();
}
} // namespace WmIOInterface
 
#endif // WMIOINTERFACE_H