/*
 * Copyright (c) 2003 The Regents of The University of Michigan
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
 * met: redistributions of source code must retain the above copyright
 * notice, this list of conditions and the following disclaimer;
 * redistributions in binary form must reproduce the above copyright
 * notice, this list of conditions and the following disclaimer in the
 * documentation and/or other materials provided with the distribution;
 * neither the name of the copyright holders nor the names of its
 * contributors may be used to endorse or promote products derived from
 * this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#include <sys/types.h>
#include <sys/stat.h>

#include <cstring>
#include <fstream>
#include <list>
#include <string>
#include <vector>

#include "base/misc.hh"
#include "sim/universe.hh"
#include "sim/host.hh"
#include "sim/param.hh"

using namespace std;

Tick curTick = 0;
Tick ticksPerSecond;
double __ticksPerMS;
double __ticksPerUS;
double __ticksPerNS;
double __ticksPerPS;

string outputDirectory;
ostream *outputStream;

class UniverseParamContext : public ParamContext
{
  private:
    ofstream outputFile;

  public:
    UniverseParamContext(const string &is) : ParamContext(is) {}
    void checkParams();
};

UniverseParamContext universe("Universe");

Param<Tick> universe_freq(&universe, "frequency", "tick frequency",
                          200000000);

Param<string> universe_output_dir(&universe, "output_dir",
                                  "directory to output data to");
Param<string> universe_output_file(&universe, "output_file",
                                   "file to dump simulator output to");

void
UniverseParamContext::checkParams()
{
    ticksPerSecond = universe_freq;
    double freq = double(ticksPerSecond);
    __ticksPerMS = freq / 1.0e3;
    __ticksPerUS = freq / 1.0e6;
    __ticksPerNS = freq / 1.0e9;
    __ticksPerPS = freq / 1.0e12;

    if (universe_output_dir.isValid()) {
        outputDirectory = universe_output_dir;

        // guarantee that directory ends with a '/'
        if (outputDirectory[outputDirectory.size() - 1] != '/')
            outputDirectory += "/";

        if (mkdir(outputDirectory.c_str(), 0777) < 0) {
            if (errno != EEXIST) {
                panic("%s\ncould not make output directory: %s\n",
                      strerror(errno), outputDirectory);
            }
        }
    }

    string filename;
    if (universe_output_file.isValid()) {
        string f = universe_output_file;
        if (f != "stdout" && f != "cout" && f != "stderr" && f != "cerr")
            filename = outputDirectory + f;
        else
            filename = f;
    } else {
        if (outputDirectory.empty())
            filename = "stdout";
        else
            filename = outputDirectory + "output.txt";
    }

    if (filename == "stdout" || filename == "cout")
        outputStream = &cout;
    else if (filename == "stderr" || filename == "cerr")
        outputStream = &cerr;
    else {
        outputFile.open(filename.c_str(), ios::trunc);
        outputStream = &outputFile;
    }
}