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/*! \internal \file
 * \brief
 * Implements functions from niceheader.h.
 *
 * \author Mark Abraham <mark.j.abraham@gmail.com>
 * \ingroup module_utility
 */
#include "gmxpre.h"

#include "gromacs/utility/niceheader.h"

#include "gromacs/utility/stringutil.h"
#include "gromacs/utility/sysinfo.h"
#include "gromacs/utility/textwriter.h"

namespace gmx
{

void niceHeader(TextWriter* writer, const char* fn, char commentChar)
{
    char userbuf[256];
    char hostbuf[256];

    /* Write a nice header for an output file */
    writer->writeLine(formatString("%c", commentChar));
    writer->writeLine(formatString("%c\tFile '%s' was generated", commentChar, fn ? fn : "unknown"));

    int uid = gmx_getuid();
    gmx_getusername(userbuf, 256);
    gmx_gethostname(hostbuf, 256);

    writer->writeLine(formatString("%c\tBy user: %s (%d)", commentChar, userbuf, uid));
    writer->writeLine(formatString("%c\tOn host: %s", commentChar, hostbuf));
    writer->writeLine(formatString("%c\tAt date: %s", commentChar, gmx_format_current_time().c_str()));
    writer->writeLine(formatString("%c", commentChar));
}

} // namespace gmx
