copy.hpp

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/**
 * @file
 * Defines the `OpenMPCD::ImplementationDetails::Configuration::copy` function.
 */
 
#ifndef OPENMPCD_IMPLEMENTATIONDETAILS_CONFIGURATION_COPY_HPP
#define OPENMPCD_IMPLEMENTATIONDETAILS_CONFIGURATION_COPY_HPP
 
#include <OpenMPCD/Exceptions.hpp>
#include <OpenMPCD/Utility/PlatformDetection.hpp>
 
#include <cstdio>
#include <cstdlib>
#include <libconfig.h++>
 
namespace OpenMPCD
{
namespace ImplementationDetails
{
namespace Configuration
{
 
/**
 * Copies a `libconfig::Config` instance.
 * @param[in]  from The instance to copy from.
 * @param[out] to   The instance to copy to.
 */
inline void copy(const libconfig::Config& from, libconfig::Config* const to)
{
    #if defined(OPENMPCD_PLATFORM_POSIX)
        char* buffer;
        std::size_t bufferSize;
 
        FILE* const stream = open_memstream(&buffer, &bufferSize);
 
        if(!stream)
            OPENMPCD_THROW(Exception, "Failed to allocate stream.");
    #elif defined(OPENMPCD_PLATFORM_WIN32)
        char filename[L_tmpnam_s];
        if(tmpnam_s(filename) != 0)
            OPENMPCD_THROW(Exception, "Failed to create temporary file name.");
 
        FILE* stream;
        if(fopen_s(&stream, filename, "w+") != 0)
            OPENMPCD_THROW(Exception, "Failed to open temporary file.");
    #else
        #error Unknown platform
    #endif
 
    from.write(stream);
 
    rewind(stream);
 
    to->read(stream);
 
    fclose(stream);
 
    #ifdef OPENMPCD_PLATFORM_POSIX
        free(buffer);
    #endif
}
 
} //namespace Configuration
} //namespace ImplementationDetails
} //namespace OpenMPCD
 
#endif