//-*- mode: c++; indent-tabs-mode: t; coding: utf-8; show-trailing-whitespace: t -*-

// file utilities.cpp

#include "utilities.hpp"

//

namespace kwtcom {

  long int nKWTVAX;

}

namespace utilities
{

#ifdef USE_POSIX

  bool exists(const char *p)
  {
    struct stat sb;
    //
    return p && (0 == stat (p, &sb));
  }

#else

  bool exists(const char *p)
  {
    bool bReturnValue = false;
    std::fstream sFile;
    //
    if(p) {
      sFile.open(p, std::ios_base::in);
      bReturnValue = sFile.is_open();
      if(bReturnValue)
	sFile.close();
    }
    return bReturnValue;
  }

#endif

  std::string format(const std::string &format, ...)
  {
    va_list args;
    va_start(args, format);
    size_t nLength = std::vsnprintf(NULL, 0, format.c_str(), args);
    va_end (args);
    std::vector<char> sVector (nLength + 1);
    va_start (args, format);
    std::vsnprintf (&sVector[ 0 ], nLength + 1, format.c_str(), args);
    va_end (args);
    return &sVector[ 0 ];
  }

  void quiter(void)
  {
    ;
  }

  // subroutine window.
  void window(std::ostream &os, std::stringstream &ss)
  {
    // Module of interactive emtp usage only, which services "emtspy".
    // For non-interactive emtp, this module can be destroyed.
    // For character*132 spy display channel munit6, this serves
    // to actually output the line to the spy display device.
    // VAX-11  installation-dependent EMTP module.
    size_t j;
    size_t k;
    std::string sData;
    //
    sData = ss.str();
    if(abs(spycom::nKVerfy) != 34543) {
      for(j = 1; j <= 132; j++) {
	k = 133 - j;
	if(sData[ k - 1 ] != ' ')
	  break;
      }
      os << sData.substr(0, k) << std::endl;
      os.flush();
    }
  }

  // subroutine honker.
  void honker(const long int &nKLevel)
  {
    // Module of interactive EMTP only, which services "emtspy".
    // If no interactive use, this module can be deleted.
    // VAX-11 installation-dependent emtp module which issues
    // an audible alarm (via a terminal speaker) of intensity
    // controlled by argument klevel.  This is on a scale of
    // one to ten, with zero meaning no noise at all, and ten
    // corresponding to a disaster alert (e.g., air raid sirens).
    // This VAX-11 module is designed for DEC VT100 terminal.  The
    // idea is by Albert H. Schmidt, BPA route EOGA.  At the keyboard,
    // ctrl-g will ring the bell, and the ascii character 7 is
    // equivalent within a program.  Shortage of 1 bell is due to
    // carriage control, maybe (see n8 = j + 1, rather than j, below).
    int nd13;
    double d13;
    std::string pSpyTim[ 2 ], pSpDate[ 2 ];
    //
    d13 = 2.0;
    date_time::time44(pSpyTim);
    date_time::date44(pSpDate);
    spyf77::sBuff77 = std::string (10, '\7');
    FOREVER {
      (*reinterpret_cast<std::stringstream *>(spycom::pMFiles[ 5 ])) << " Audible alarm began at  ";
      (*reinterpret_cast<std::stringstream *>(spycom::pMFiles[ 5 ])) << std::setw(4) << pSpyTim[ 0 ] << pSpyTim[ 1 ];
      (*reinterpret_cast<std::stringstream *>(spycom::pMFiles[ 5 ])) << "  ";
      (*reinterpret_cast<std::stringstream *>(spycom::pMFiles[ 5 ])) << std::setw(4) << pSpDate[ 0 ] << pSpDate[ 1 ];
      (*reinterpret_cast<std::stringstream *>(spycom::pMFiles[ 5 ])) << std::string(5, ' ');
      (*reinterpret_cast<std::stringstream *>(spycom::pMFiles[ 5 ])) << std::setw(3) << spycom::nKLevel;
      (*reinterpret_cast<std::stringstream *>(spycom::pMFiles[ 5 ])) << " bells.";
      (*reinterpret_cast<std::stringstream *>(spycom::pMFiles[ 5 ])) << spyf77::sBuff77 << std::endl << std::flush;
      window(*reinterpret_cast<std::ostream*>(blkcom::pLFiles[ 5 ]),	\
	     *reinterpret_cast<std::stringstream *>(spycom::pMFiles[ 5 ]));
      if(spycom::nKLevel < 10)
	break;
      nd13 = (int) d13;
      date_time::tdelay(nd13);
      if(d13 == -7654)
	break;
      flager();
      if(spycom::nKWTSpy != 0) {
	spycom::nKWTSpy = 0;
	break;
      } else
	d13 = 1.5 * d13;
    }
  }

  // subroutine flager.
  void flager(void)
  {
    // Module of interactive EMTP only, which services "emtspy".
    // if no interactive use, convert to dummy module ("return").
    // VAX-11 installation-dependent emtp module which serves
    // to read spy command from munit5 if: 1) ctrl-c interrupt
    // has occurred, or 2) if  lockbr = 1  upon entry.
    long int pIDum[ 3 ];
    //
    if(spycom::nIprSpy >= 10) {
      (*reinterpret_cast<std::stringstream *>(spycom::pMFiles[ 5 ])) << " Top flager.  istep, kwtspy, itype, lastov =" << blkcom::nIStep << blkcom::nKWTSpy << blkcom::nIType << blkcom::nLastOV << std::endl;
      window(*reinterpret_cast<std::ostream *>(blkcom::pLFiles[ 5 ]), \
	     *reinterpret_cast<std::stringstream *>(spycom::pMFiles[ 5 ]));
    }
    if(blkcom::nLastOV == 9911) {
      spyf77::sBuff77 = "space";
      blkcom::nKWTSpy = 1;
      spycom::nKFile5 = 2;
      goto a3651;
    }
    if(kwtcom::nKWTVAX != 0) {
      spyf77::sProm80 = " spy:";
      prompt(*reinterpret_cast<std::ostream *>(blkcom::pLFiles[ 5 ]),	\
	     spyf77::sProm80);
      //
      if (spycom::nIprSpy < 1)
	(*reinterpret_cast<std::stringstream *>(spycom::pMFiles[ 5 ])) << " Enable VAX ctrl-c interception in \"flager\"." << std::endl;
      window(*reinterpret_cast<std::ostream *>(blkcom::pLFiles[ 5 ]),	\
	     *reinterpret_cast<std::stringstream *>(spycom::pMFiles[ 5 ]));

    a3491:
      goto a3643;
    }
    if((spycom::nLockBR != 1) || (spycom::nKFile5 == 1))
      goto a3651;

  a3643:
    reinterpret_cast<std::stringstream *>(spycom::pMFiles[ 4 ]) -> read(&spyf77::sBuff77[ 0 ], 80);
    blkcom::nKWTSpy = 1;
    spycom::nKFile5 = 2;
    if(spycom::nKSPSav == 0)
      goto a3650;
    if(strcom::toLower(spyf77::sBuff77.substr(0, 7)) == "cancel ")
      goto a3648;
    ++spycom::nKSPSav;
    goto a3643;

  a3648:
    --spycom::nKSPSav;
    if (spycom::nKSPSav > spycom::nNumCRD)
      goto a3649;
    std::cout << " Error stop; overflow in \"flager\"." << std::endl;
    emtp::stoptp();

  a3649:
    spyf77::sFile6[ spycom::nKSPSav - 1 ] = spyf77::sBuff77;

  a3650:
    goto a3651;

  a3651:
    if (spycom::nIprSpy >= 9) {
      *((std::stringstream *) spycom::pMFiles[ 5 ]) << " Exit \"flager\".  kwtspy =" << blkcom::nKWTSpy << "   buff77 = " << spyf77::sBuff77.substr(0, 80) << std::endl;
      window(*reinterpret_cast<std::ostream *>(blkcom::pLFiles[ 5 ]),	\
	     *reinterpret_cast<std::stringstream *>(spycom::pMFiles[ 5 ]));
    }
  }

  // subroutine prompt.
  void prompt(std::ostream &os, const std::string &sPrompt)
  {
    // VAX-11  installation-dependent emtp module used only
    // for interactive EMTP ("emtspy").  Input is program
    // prompt in character*80 variable prom80 of deck "dekspy".
    // The prompt must end with colon (":").  Then line feed
    // will be suppressed, so subsequent read is to right of ":".
    // For non-interactive EMTP, this module can be destroyed.
    long int j;
    long int n2;
    //
    n2 = 80;
    for(j = 1; j <= 80; j++) {
      if(sPrompt[ n2 - 1 ] == ' ')
	break;
      --n2;
    }
    os << sPrompt.substr(0, n2);
  }

  // subroutine openfile.
  bool openFile(std::fstream *pFile,				\
		std::string &sFileName,				\
		const std::ios::openmode &mode)
  {
    bool bReturnValue = false;
    //
    if(pFile) {
      pFile -> open(sFileName.c_str(), mode);
      bReturnValue = pFile -> good();
    }
    return bReturnValue;
  }

  // subroutine closefile.
  bool closeFile(std::fstream *pFile)
  {
    bool bReturnValue = false;
    //
    if(pFile) {
      pFile -> close();
      bReturnValue = true;
    }
    return bReturnValue;
  }

  // subroutine copyfile.
  bool copyFile(std::fstream *pInFile,					\
		std::fstream *pOutFile,					\
		const std::string &sFileName)
  {
    bool bReturnValue = false;
    //
    if(pInFile && pOutFile) {
      pOutFile -> close();
      pOutFile -> open(sFileName.c_str(), std::ios::out | std::ios::trunc);
      pInFile -> seekg(0, std::ios::beg);
      char pTempData[ 80 ];
      while(!pInFile -> eof()) {
	pInFile -> read(pTempData, 80);
	pOutFile -> write(pTempData, 80);
      }
      pOutFile -> close();
      pInFile -> seekg(0, std::ios::beg);
      bReturnValue = true;
    }
    return bReturnValue;
  }

  // subroutine deletefile.
  bool deleteFile(const std::string &sFileName)
  {
    ;
  }

  struct winsize getTerminalSize(void)
  {
    struct winsize sReturnValue;
    //
    ioctl(STDOUT_FILENO, TIOCGWINSZ, &sReturnValue);
    if(blkcom::nNOutPR > 0) {
      (*reinterpret_cast<std::ostream *>(blkcom::pLFiles[ 5 ])) << " Terminal lines = ";
      (*reinterpret_cast<std::ostream *>(blkcom::pLFiles[ 5 ])) << std::setfill(' ') << std::setw(8) << std::dec << sReturnValue.ws_row;
      (*reinterpret_cast<std::ostream *>(blkcom::pLFiles[ 5 ])) << ", columns = ";
      (*reinterpret_cast<std::ostream *>(blkcom::pLFiles[ 5 ])) << std::setfill(' ') << std::setw(8) << std::dec << sReturnValue.ws_col << std::endl;
    }
    return sReturnValue;
  }

  void expchk(long int &n1,			\
	      long int &n2,			\
	      long int &n5)
  {
    const char cText1 = 'e', cTextN = '-', cTextP = '+';
    const char pTexNum[ 11 ] = { '1', '2', '3', '4', '5', '6', '7', '8', '9', '0', '.' };
    char pX[ 80 ];
    //
    long int i;
    long int j;
    long int k;
    long int l;
    long int n3, n4;
    long int nKey;
    //
    blkcom::sABuff.read(pX, 80);
    for(i = n1; i <= n2; i += n5) {
      nKey = 0;
      for(j = 1; j <= n5; j++) {
	n3 = i + j - 1;
	if(pX[ 2 ] == cText1)
	  goto a2622;
	if(nKey > 0)
	  goto a2620;
	for(k = 1; k <= 11; k++) {

	a2619:
	  if(pX[ n3 - 1 ] == pTexNum[ k - 1 ])
	    nKey = k;
	  goto a2621;

	a2620:
	  if((pX[ n3 - 1 ] == cTextP) || (pX[ n3 - 1 ] == cTextN))
	    goto a2622;

	a2621:
	  ;
	}
	goto a2625;

      a2622:
	n4 = i + n5 - 1;
	for(l = 1; l<= 10; l++) {
	  if(pX[ n4 - 1 ] == pTexNum[ l - 1 ])
	    goto a2625;
	}

      a2624:
	blkcom::nKill = 97;
	blkcom::pSStat -> m_nWT = i;
	blkcom::pSStat -> m_nTails = n4;
	blkcom::pSStat -> m_nTACST = 2624;
	return;

      a2625:
	;
      }
    }
  }

}
// end of file utilities.cpp