%%	options

copyright owner	=	Dirk Krause
copyright year	=	2011-2014
license		=	bsd



%%	header

#include "dk3conf.h"



#if DK3_HAVE_TCGETATTR
/**	Terminal IO structure.
*/
typedef struct termios dk3_termios_t;
#else
#if defined(TCGETS)
/**	Terminal IO structure.
*/
typedef struct termios dk3_termios_t;
#else

#endif
#endif



/**	Keyboard echo configuration.
*/
typedef struct {
  
#if DK3_ON_WINDOWS

  /**	Handle for console.
  */
  HANDLE		consoleHandle;

  /**	Original console flags.
  */
  DWORD			ori;

#else
/* DK3_ON_WINDOWS */

#if DK3_HAVE_TCGETATTR

  /**	Original terminal settings.
  */
  dk3_termios_t		ori;

#else
/* DK3_HAVE_TCGETATTR */

#if defined(TCGETS)

  /**	Original terminal settings.
  */
  dk3_termios_t		ori;
#else
/* defined(TCGETS) */

#endif
/* defined(TCGETS) */

#endif
/* DK3_HAVE_TCGETATTR */

#endif
/* DK3_ON_WINDOWS */

  /**	Flag: Standard input is a terminal.
  */
  int			is_tty;

} dk3_echo_t;



#ifdef __cplusplus
extern "C" {
#endif

/**	Save current keyboard echo settings.
	@param	ep	Keyboard echo settings structure.
	@param	app	Application structure for diagnostics, may be NULL.
	@return	1 on success, 0 on error.
*/
int
dk3echo_save_app(dk3_echo_t *ep, dk3_app_t *app);

/**	Restore keyboard echo settings.
	@param	ep	Keyboard echo settings structure.
	@param	app	Application structure for diagnostics, may be NULL.
	@return	1 on success, 0 on error.
*/
int
dk3echo_restore_app(dk3_echo_t *ep, dk3_app_t *app);

/**	Disable keyboard echo.
	@param	ep	Keyboard echo settings structure.
	@param	app	Application structure for diagnostics, may be NULL.
	@return	1 on success, 0 on error.
*/
int
dk3echo_off_app(dk3_echo_t *ep, dk3_app_t *app);

/**	Check whether standard input is from terminal for settings structure.
	@param	ep	Keyboard echo settings structure.
	@param	app	Application structure for diagnostics, may be NULL.
	@return	1 on success, 0 on error.
*/
int
dk3echo_is_tty_app(dk3_echo_t const *ep, dk3_app_t *app);

/**	Check whether standard input is from terminal.
	@param	ep	Keyboard echo settings structure.
	@param	app	Application structure for diagnostics, may be NULL.
	@return	1 on success, 0 on error.
*/
int
dk3echo_test_tty_app(dk3_echo_t *ep, dk3_app_t *app);

/**	Save current keyboard echo settings.
	@param	ep	Keyboard echo settings structure.
	@return	1 on success, 0 on error.
*/
int
dk3echo_save(dk3_echo_t *ep);

/**	Restore keyboard echo settings.
	@param	ep	Keyboard echo settings structure.
	@return	1 on success, 0 on error.
*/
int
dk3echo_restore(dk3_echo_t *ep);

/**	Disable keyboard echo.
	@param	ep	Keyboard echo settings structure.
	@return	1 on success, 0 on error.
*/
int
dk3echo_off(dk3_echo_t *ep);

/**	Check whether standard input is from terminal for settings structure.
	@param	ep	Keyboard echo settings structure.
	@return	1 on success, 0 on error.
*/
int
dk3echo_is_tty(dk3_echo_t *ep);

/**	Check whether standard input is from terminal.
	@param	ep	Keyboard echo settings structure.
	@return	1 on success, 0 on error.
*/
int
dk3echo_test_tty(dk3_echo_t *ep);

#ifdef __cplusplus
}
#endif



%%	module


#include "dk3all.h"
#include "dk3echo.h"


$!trace-include



int
dk3echo_save(dk3_echo_t *ep)
{
  int back;
  back = dk3echo_save_app(ep, NULL);
  return back;
}



int
dk3echo_save_app(dk3_echo_t *ep, dk3_app_t *app)
{
  int back = 0;
  if(ep) {
#if DK3_ON_WINDOWS
  ep->consoleHandle = GetStdHandle(STD_INPUT_HANDLE);
  if(ep->consoleHandle != INVALID_HANDLE_VALUE) {
    ep->is_tty = 1;
    if(GetConsoleMode(ep->consoleHandle, &(ep->ori))) {
      back = 1;
    } else {
      if(app) {
        /* ERROR: Failed to retrieve console settings! */
	dk3app_log_i1(app, DK3_LL_ERROR, 265);
      }
    }
  } else {
    if(app) {
      /* ERROR: Failed to obtain handle for standard input! */
      dk3app_log_i1(app, DK3_LL_ERROR, 265);
    }
  }
#else
#if DK3_HAVE_ISATTY
  ep->is_tty = isatty(0);
#else
  ep->is_tty = 1;
#endif
#if DK3_HAVE_TCGETATTR
  if(tcgetattr(0, &(ep->ori)) == 0) {
    back = 1;
  } else {
    if(app) {
      /* ERROR: Failed to retrieve console settings! */
      dk3app_log_i1(app, DK3_LL_ERROR, 265);
    }
  }
#else
#if defined(TCGETS)
  if(ioctl(0, TCGETS, &(ep->ori)) == 0) {
    back = 1;
  } else {
    if(app) {
      /* ERROR: Failed to retrieve console settings! */
      dk3app_log_i1(app, DK3_LL_ERROR, 265);
    }
  }
#else

#endif
#endif
#endif
  }
  return back;
}



int
dk3echo_restore(dk3_echo_t *ep)
{
  int back;
  back = dk3echo_restore_app(ep, NULL);
  return back;
}



int
dk3echo_restore_app(dk3_echo_t *ep, dk3_app_t *app)
{
  int back = 0;
  if(ep) {
#if DK3_ON_WINDOWS
    if(ep->consoleHandle != INVALID_HANDLE_VALUE) {
      if(SetConsoleMode(ep->consoleHandle, ep->ori)) {
        back = 1;
      } else {
        if(app) {
	  /* ERROR: Failed to restore console settings! */
	  dk3app_log_i1(app, DK3_LL_ERROR, 266);
	}
      }
    }
#else
#if DK3_HAVE_TCGETATTR
    if(tcsetattr(0, TCSANOW, &(ep->ori)) == 0) {
      back = 1;
    } else {
      if(app) {
        /* ERROR: Failed to restore console settings! */
	dk3app_log_i1(app, DK3_LL_ERROR, 266);
      }
    }
#else
#if defined(TCGETS)
    if(ioctl(0, TCSETS, &(ep->ori)) == 0) {
      back = 1;
    } else {
      if(app) {
        /* ERROR: Failed to restore console settings! */
	dk3app_log_i1(app, DK3_LL_ERROR, 266);
      }
    }
#else

#endif
#endif
#endif
  }
  return back;
}



int
dk3echo_off(dk3_echo_t *ep)
{
  int back;
  back = dk3echo_off_app(ep, NULL);
  return back;
}



int
dk3echo_off_app(dk3_echo_t *ep, dk3_app_t *app)
{
  int back = 0;
  if(ep) {
#if DK3_ON_WINDOWS
    if(ep->consoleHandle != INVALID_HANDLE_VALUE) {
      if(SetConsoleMode(ep->consoleHandle,((ep->ori) & (~(ENABLE_ECHO_INPUT)))))
      {
        back = 1;
      }
      else
      {
        if(app) {
	  /* ERROR: Failed to modify console settings! */
	  dk3app_log_i1(app, DK3_LL_ERROR, 267);
	}
      }
    }
#else
#if DK3_HAVE_TCGETATTR
    dk3_termios_t	nti;
    dk3mem_cpy((void *)(&nti), (void *)(&(ep->ori)), sizeof(dk3_termios_t));
#if defined(ECHO)
    nti.c_lflag &= (~(ECHO));
#endif
#if defined(ECHONL)
    nti.c_lflag &= (~(ECHONL));
#endif
    if(tcsetattr(0, TCSANOW, &nti) == 0) {
      back = 1;
#if DK3_HAVE_TCFLUSH
      tcflush(0, TCIFLUSH);
#endif
    } else {
      if(app) {
        /* ERROR: Failed to modify terminal settings! */
	dk3app_log_i1(app, DK3_LL_ERROR, 267);
      }
    }
#else
#if defined(TCGETS)
    dk3_termios_t nti;
    dk3mem_cpy((void *)(&nti), (void *)(&(ep->ori)), sizeof(dk3_termios_t));
#if defined(ECHO)
    nti.c_lflag &= (~(ECHO));
#endif
#if defined(ECHONL)
    nti.c_lflag &= (~(ECHONL));
#endif
    if(ioctl(0, TCSETS, &nti) == 0) {
      back = 1;
      (void)ioctl(0, TCFLSH, 0);
    } else {
      if(app) {
        /* ERROR: Failed to modify terminal settings! */
	dk3app_log_i1(app, DK3_LL_ERROR, 267);
      }
    }
#else

#endif
#endif
#endif
  }
  return back;
}



int
dk3echo_is_tty(dk3_echo_t *ep)
{
  int back;
  back = dk3echo_is_tty_app(ep, NULL);
  return back;
}



int
dk3echo_is_tty_app(dk3_echo_t const *ep, dk3_app_t *app)
{
  int back = 0;
  if(ep) {
    back = ep->is_tty;
  }
  return back;
}



int
dk3echo_test_tty(dk3_echo_t *ep)
{
  int back;
  back = dk3echo_test_tty_app(ep, NULL);
  return back;
}



int
dk3echo_test_tty_app(dk3_echo_t *ep, dk3_app_t *app)
{
  int back = 0;
  if(ep) {
#if DK3_ON_WINDOWS
    if(GetStdHandle(STD_INPUT_HANDLE) != INVALID_HANDLE_VALUE) {
      back = 1;
    } else {
      if(app) {
        /* ERROR: Failed to retrieve console settings! */
	dk3app_log_i1(app, DK3_LL_ERROR, 265);
      }
    }
#else
#if DK3_HAVE_ISATTY
    back = isatty(0);
#endif
    dk3app_log_i1(app, DK3_LL_ERROR, 265);
#endif
  }
  return back;
}


/* vim: set ai sw=2 : */