MacFormat 1995 November/macformat-030.iso/Shareware City/Developers/gray image 2.1/mymenv.cc

Text File | 1995-06-13 | 4.7 KB | 167 lines | [TEXT/KAHL]

// This may look like C code, but it is really -*- C++ -*-
/*
 ************************************************************************
 *                      Macintosh Service C++ functions
 *           that support the standard environment for me on Macintosh
 *
 * $Id: myenv.cc,v 1.3 1995/02/08 17:23:50 oleg Exp oleg $
 */


#include "mymenv.h"
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <Sound.h>
#include <new.h>



static const int System_Alert_rsc = -16411;            // ID of the System ALRT
                                                    // resource (in the System file)
/*
 *------------------------------------------------------------------------
 *            Something got screwed up and we're out of here
 * Synopsis
 *    volatile void _die(const char * message,... );
 *    Message may contain format control sequences %x. Items to print
 *    with the control sequences are to be passed as additional arguments to
 *    the function call.
 */

volatile void _die(const char * message,...)
{
  va_list args;
  char buffer[1000];
  va_start(args,message);            // Init 'args' to the beginning of
                                    // the variable length list of args
  vsprintf(buffer,message,args);
  strncat(buffer,"\rSorry man, enough is enough, I'm outta here",sizeof(buffer)-strlen(buffer)-1);
  CtoPstr(buffer);                            // Convert to Pascal-like string
  ParamText((ConstStr255Param)buffer,nil,nil,nil); // Set the string in the Alert resource
  Alert(System_Alert_rsc,0L);                // Display the Alert box and the string
                                              // set just before
  exit(4);
}

                                    // This guy handles the situation when the memory
                                    // allocation through 'new' has failed
static void my_new_failed_handler(void)
{
    _die("Flat out of memory");
}

/*
 *------------------------------------------------------------------------
 *                    Just tell the user something
 * Synopsis
 *    void alert(const char * text,... );
 *    Message may contain format control sequences %x. Items to print
 *    with the control sequences are to be passed as additional arguments to
 *    the function call.
 */

void alert(const char * text,...)
{
  va_list args;
  char buffer[1000];
  va_start(args,text);                        // Init 'args' to the beginning of
                                            // the variable length list of args
  vsprintf(buffer,text,args);
  CtoPstr(buffer);                            // Convert to Pascal-like string
  ParamText((ConstStr255Param)buffer,nil,nil,nil); // Set the string in the Alert resource
  Alert(System_Alert_rsc,0L);                // Display the Alert box and the string
}

//------------------------------------------------------------------------
//                  Patches to the standard environment

#ifndef _myenv_h
                                // Like strncpy(), but ALWAYS terminates
                                // the destination string
char * xstrncpy(char * dest, const char * src, const int len)
{
  strncpy(dest,src,len);
  dest[len] = '\0';
  return dest;
}

#endif

                                    // Used to "implicitly" convert from a C to Pascal
                                    // string
Pstr::Pstr(const char * c_str)
{
    strncpy((char *)pas_string,c_str,sizeof(*this)-2);
    CtoPstr((char *)pas_string);
}

//------------------------------------------------------------------------
//                            Sound playing on errors


static Handle error_sound_handle = nil;

static pascal void error_sound_player(short sound_no)
{
  if( error_sound_handle != nil )
    SndPlay(nil,(SndListHandle)error_sound_handle,FALSE);
  else
    SysBeep(10);
  error_sound_handle = nil;
}

void set_error_sound(Str255 sound_name)
{
  error_sound_handle = GetNamedResource('snd ',sound_name);
  if( error_sound_handle != nil )
    ErrorSound(NewSoundProc(error_sound_player));
}


/*
 *------------------------------------------------------------------------
 *               Suspending the application for a specified period of time
 *
 * Unlike Delay(), the present function is generous in that in relinquishes the
 * CPU control for a specified time and thus lets other (backgrounded) application
 * run.
 * The generous waiting is implemented as waiting for a null event which is to
 * be sent to the application after the specifed timed interval expired. Note
 * the application can get woken up before the time comes if other application
 * calls WakeUpProcess().
 */

void sleep(const int nticks)
{
    EventRecord event;
    const int event_mask = 0;                // Wait for null events only
    WaitNextEvent(event_mask,&event,nticks,nil);
}


/*
 *------------------------------------------------------------------------
 *                            Initialize the Macintosh
 *                 Initialize all the managers & memory
 */

void Initialize_MAC(void)
{
    MaxApplZone();

    InitGraf(&qd.thePort);
    InitFonts();
    FlushEvents(everyEvent, 0);
    InitWindows();
    InitMenus();
    TEInit();
    InitDialogs(0);
    InitCursor();

    set_new_handler(my_new_failed_handler);
}