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// -*- mode: c++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2; coding: utf-8-unix -*-
// ***** BEGIN LICENSE BLOCK *****
////////////////////////////////////////////////////////////////////
// Copyright (c) 2011-2013 RALOVICH, Kristóf                      //
//                                                                //
// This program is free software; you can redistribute it and/or  //
// modify it under the terms of the GNU General Public License    //
// version 2 as published by the Free Software Foundation.        //
//                                                                //
////////////////////////////////////////////////////////////////////
// ***** END LICENSE BLOCK *****


#include "common.hpp"
#include <iostream>
#include <boost/thread/thread_time.hpp>
#include <boost/thread.hpp>
#include <boost/tokenizer.hpp>
#include <boost/foreach.hpp>
//#include <QDateTime>
#include <sstream>
#include <boost/date_time.hpp>
#include <boost/filesystem.hpp>


std::ostream&
logger()
{
  std::cout.flush();
  return std::cout;
}

FILE*
loggerc()
{
  fflush(stdout);
  return stdout;
}


void
sleepms(const size_t timeout_ms)
{
  boost::system_time const timeout=boost::get_system_time() + boost::posix_time::milliseconds(timeout_ms);
  boost::this_thread::sleep(timeout);
}


#ifndef _MSC_VER
/**
 * C++ version 0.4 char* style "itoa":
 * Written by Lukás Chmela
 * Released under GPLv3.
 */
char*
itoa(int value, char* result, int base)
{
  // check that the base if valid
  if (base < 2 || base > 36) { *result = '\0'; return result; }

  char* ptr = result, *ptr1 = result, tmp_char;
  int tmp_value;

  do {
    tmp_value = value;
    value /= base;
    *ptr++ = "zyxwvutsrqponmlkjihgfedcba9876543210123456789abcdefghijklmnopqrstuvwxyz" [35 + (tmp_value - value * base)];
  } while ( value );

  // Apply negative sign
  if (tmp_value < 0) *ptr++ = '-';
  *ptr-- = '\0';
  while(ptr1 < ptr) {
    tmp_char = *ptr;
    *ptr--= *ptr1;
    *ptr1++ = tmp_char;
  }
  return result;
}
#endif


template < class T >
const std::string
toString(const T& val, const int width, const char fill)
{
  std::stringstream clStr;
  if(width != -1) clStr << std::setw(width);
  if(fill != ' ') clStr << std::setfill(fill);
  clStr << std::hex;
  clStr << val;
  return clStr.str();
}


template < class T >
const std::string
toStringDec(const T& val, const int width, const char fill)
{
  std::stringstream clStr;
  if(width != -1) clStr << std::setw(width);
  if(fill != ' ') clStr << std::setfill(fill);
  clStr << val;
  return clStr.str();
}

const std::vector<std::string>
tokenize(const std::string& text, const char* delims)
{
  std::vector<std::string> rv;
  boost::char_separator<char> sep(delims);
  boost::tokenizer<boost::char_separator<char> > tokens(text, sep);
  BOOST_FOREACH(std::string t, tokens)
  {
    rv.push_back(t);
  }
  return rv;
}

const std::string
getDateString()
{
  //QString filename = QDateTime::currentDateTime().toString("yyyy_MM_dd_hh_mm_ss");
  //QByteArray ba=filename.toLatin1();
  //return ba.constData();
  std::ostringstream msg;
  const boost::posix_time::ptime now=boost::posix_time::second_clock::local_time();
  boost::posix_time::time_facet*const f=new boost::posix_time::time_facet("%Y_%m_%d_%H_%M_%S");
  msg.imbue(std::locale(msg.getloc(),f));
  msg << now;
  return msg.str();
}


const std::string
getConfigFileName()
{
  return getConfigFolder() + "/config.ini";
}


const std::string
getConfigFolder()
{
  const char* e0 = getenv("ANTPM_DIR");
  if(e0 && strlen(e0) > 0)
    return std::string(e0) + "/";

  // http://standards.freedesktop.org/basedir-spec/basedir-spec-latest.html
  // $XDG_CONFIG_HOME defines the base directory relative to which user specific configuration files should be stored.
  // If $XDG_CONFIG_HOME is either not set or empty, a default equal to $HOME/.config should be used. 

#ifndef _WIN32
  const char* e1 = getenv("XDG_CONFIG_HOME");
  const char* e2 = getenv("HOME");
  if(e1 && strlen(e1) > 0)
    return std::string(e1) + "/" APP_NAME "/";
  else if(e2 && strlen(e2) > 0)
    return std::string(e2) + "/.config/" APP_NAME "/";
#else
  const char* e3 = getenv("USERPROFILE");
  if(e3 && strlen(e3) > 0)
    return std::string(e3) + "/.config/" APP_NAME"/";
#endif
  else
    return "~/.config/" APP_NAME "/";
}



void
readUInt64(const uint clientSN, uint64_t& pairedKey)
{
  std::stringstream ss;
  ss << getConfigFolder() << "libantpmauth_" << clientSN;
  FILE* f=fopen(ss.str().c_str(), "r");
  LOG_VAR2(ss.str(), f);
  if(f)
  {
    if(1 != fread(&pairedKey, sizeof(pairedKey), 1, f))
      pairedKey = 0;
    fclose(f);
  }
}

void
writeUInt64(const uint clientSN, const uint64_t& pairedKey)
{
  std::stringstream ss;
  ss << getConfigFolder() << "libantpmauth_" << clientSN;
  FILE* f=fopen(ss.str().c_str(), "w+");
  LOG_VAR2(ss.str(), f);
  if(f)
  {
    fwrite(&pairedKey, sizeof(pairedKey), 1, f);
    fclose(f);
  }
}

std::vector<uchar>
readFile(const char* fileName)
{
  std::vector<uchar> v;
  FILE* f=fopen(fileName, "rb");
  if(f)
  {
    uchar buf[256];
    size_t lastRead=0;
    do
    {
      lastRead=fread(buf, 1, 256, f);
      v.insert(v.end(), buf, buf+lastRead);
    } while(lastRead>0);
    fclose(f);
  }
  return v;
}


bool
mkDir(const char* dirName)
{
  //QDir qdir; CHECK_RETURN(qdir.mkpath(folder.c_str()));
  boost::filesystem::path ddir(dirName);
  return boost::filesystem::create_directories(ddir);
}

// explicit template instantiation

template const std::string toString(const int& val, const int width, const char fill);
template const std::string toString(const char& val, const int width, const char fill);
template const std::string toString(const unsigned char& val, const int width, const char fill);
template const std::string toString(const unsigned int& val, const int width, const char fill);
template const std::string toString(const unsigned short& val, const int width, const char fill);
template const std::string toString(const uint64_t& val, const int width, const char fill);


template const std::string toStringDec(const int& val, const int width, const char fill);
template const std::string toStringDec(const unsigned long& val, const int width, const char fill);
template const std::string toStringDec(const double& val, const int width, const char fill);
template const std::string toStringDec(const unsigned int& val, const int width, const char fill);