From:	"Erik Chang" <auda AT rice DOT edu>
Newsgroups:	comp.os.msdos.djgpp
Subject:	help with compiling
Date:	Mon, 29 Oct 2001 15:50:30 -0600
Organization:	Rice University, Houston TX
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Hi All,
I am trying to complie two different codes together, one with extension *.c
and the other with *.cpp. The tcint70.c contains the function called by
ctbase.cpp,  and the way I do the compiling and linking is

bcc ctbase tcint70.c

However, the following error message come out

Borland C++  Version 3.1 Copyright (c) 1992 Borland International
ctbase2.cpp:
tcint70.c:
Turbo Link  Version 5.1 Copyright (c) 1992 Borland International
Error: Undefined symbol quit70h() in module ctbase2.cpp
Error: Undefined symbol init70h() in module ctbase2.cpp

It seems that the linker cannot find the two functions defined in tcint70.c.
Why is that? Can this be solved by specifying some parameters?

Furthermore, if I integrate the codes in tcint70.c into the ctbase3.cpp
codes and then compile it (bcc ctbase3), the following message come out:

Borland C++  Version 3.1 Copyright (c) 1992 Borland International
ctbase3.cpp:
Error ctbase3.cpp 80: Cannot convert 'void (interrupt far*)(...)' to 'void
(interrupt far*)()' in function init70h()
Error ctbase3.cpp 81: Cannot convert 'void (interrupt far*)()' to 'void
(interrupt far*)(...)' in function init70h()
Error ctbase3.cpp 81: Type mismatch in parameter '__isr' in call to
'setvect(int,void (interrupt far*)(...))' in function init70h()
Error ctbase3.cpp 105: Cannot convert 'void (interrupt far*)()' to 'void
(interrupt far*)(...)' in function quit70h()
Error ctbase3.cpp 105: Type mismatch in parameter '__isr' in call to
'setvect(int,void (interrupt far*)(...))' in function quit70h()
*** 5 errors in Compile ***

It seems that the syntax in the c code is not taken by the c++ compiler.
I am using the Borlandc 3.1 under the MSDOS mode of Windows 98.
The codes are attachted below.
Thanks for your help!!

Erik

--
____________________________________

Erik Chang
Psychology Department-MS 25
Rice University
PO Box 1892
Houston, Texas 77251-1892 USA

TEL: 713-3482216
FAX: 713-3485221

codes in the order of:
ctbase2.cpp
ctbase3.cpp
tcint70.c
tcint70.h



*************************************************************************
ctbase2.cpp
#include <conio.h>
#include <io.h>
#include <stdio.h>
#include <dos.h>
#include <stdlib.h>
#include "tcint70.h"

unsigned long int tick_1, tick_2, elapsedtime;

void
main(int argc, char **argv) {

 int rt,posi;
 int rsptype;

 if (argc == 2) { //ensure correct parameters

      rsptype = atoi(argv[1]);
      if (rsptype==1) {
      init70h();
      printf("Timebase set to 1msec.\n");
      }
      else if (rsptype==2) {
      quit70h();
      printf("Timebase set to 55msec.\n");
      }

   else {
   printf("Usage: ctbase <TimeBase>\n");
   printf("arg1: 1-1msec; 2-55msec\n");
   exit(0);
  }


  }
  else {
  printf("Usage: ctbase <TimeBase>\n");
  printf("arg1: 1-1msec; 2-55msec\n");
  exit(0);
  }


}

*************************************************************************
ctbase3.cpp
#include <conio.h>
#include <graphics.h>
#include <io.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <dos.h>
#include <math.h>
#include <bios.h>
#include "tcint70.h"



#define IRQ8 0x70
#define SET_EVENT 0x8300
#define CANCEL_EVENT 0x8301
#define LARGEST 0xffff
#define PIT0 0x40
#define PIT2 0x42
#define PITMODE 0x43
#define PITCONST 1193180L
#define KBCTRL 0x61
#define NEW70H 1

static float    tick_per_ms = 1.024;
static float    ms_per_tick = 0.9765625;
static char far *event;
static unsigned char flag70h = 0;
static void     interrupt(*old70h) (__CPPARGS);
volatile unsigned long int ticks_70h;

unsigned long int tick_1, tick_2, elapsedtime;

void
main(int argc, char **argv) {

 int rsptype;


 if (argc == 2) { //ensure correct parameters

      rsptype = atoi(argv[1]);
      if (rsptype==1) {
      init70h();
      printf("Timebase set to 1msec.\n");
      }
      else if (rsptype==2) {
      quit70h();
      printf("Timebase set to 55msec.\n");
      }

   else {
   printf("Usage: ctbase <TimeBase>\n");
   printf("arg1: 1-1msec; 2-55msec\n");
   exit(0);
  }


  }
  else {
  printf("Usage: ctbase <TimeBase>\n");
  printf("arg1: 1-1msec; 2-55msec\n");
  exit(0);
  }


}



void            init70h(void)
{
    union REGS      regs;
    struct SREGS    sregs;

    unsigned int    event_seg,
                    event_off;

    if (flag70h != NEW70H) {
        old70h = getvect(IRQ8);
        setvect(IRQ8, new70h);

        event_seg = FP_SEG(event);
        event_off = FP_OFF(event);

        regs.x.ax = SET_EVENT;
        sregs.es = event_seg;
        regs.x.bx = event_off;
        regs.x.cx = LARGEST;
        regs.x.dx = LARGEST;
        int86x(0x15, &regs, &regs, &sregs);

        flag70h = NEW70H;
    }
}

void            quit70h(void)
{
    union REGS      regs;

    if (flag70h == NEW70H) {
        regs.x.ax = CANCEL_EVENT;
        int86(0x15, &regs, &regs);

        setvect(IRQ8, old70h);

        flag70h = 0;
    }
}

void interrupt  new70h(__CPPARGS)
{
    disable();
    ticks_70h++;
    enable();
    old70h();
}

unsigned long   time70h(unsigned long start, unsigned long stop)
{
    unsigned long   duration,
                    millisec;

    if (stop < start)
        return 0;
    else {
        duration = stop - start;
        millisec = duration * ms_per_tick;
        return millisec;
    }
}

void            delay70h(unsigned int delayms)
{
    unsigned long int delaybegin = 0;
    unsigned long int delayend = 0;
    unsigned int    delaytick;

    if (flag70h == NEW70H) {
        delaytick = delayms * tick_per_ms;
        delaybegin = ticks_70h;
        do {
            delayend = ticks_70h;
        } while ((delayend - delaybegin) < delaytick);
    } else {
        delaytick = delayms * 0.0182065;
        biostime(0, (long) &delaybegin);
        do {
            biostime(0, (long) &delayend);
        } while ((delayend - delaybegin) < delaytick);
    }
}

void            sound70h(int freq, int duration)
{
    int             byte;
    unsigned int    freq1;

    freq1 = PITCONST / freq;
    outportb(PITMODE, 0xb6);
    byte = (freq1 & 0xff);
    outportb(PIT2, byte);
    byte = (freq1 >> 8);
    outportb(PIT2, byte);
    byte = inportb(KBCTRL);
    outportb(KBCTRL, (byte | 3));

    delay70h(duration);
    outportb(KBCTRL, (byte & 0xfc));
}

*************************************************************************
tcint70.c

#include <dos.h>
#include <bios.h>
#include <conio.h>
#include "tcint70.h"

#define IRQ8 0x70
#define SET_EVENT 0x8300
#define CANCEL_EVENT 0x8301
#define LARGEST 0xffff
#define PIT0 0x40
#define PIT2 0x42
#define PITMODE 0x43
#define PITCONST 1193180L
#define KBCTRL 0x61
#define NEW70H 1

static float    tick_per_ms = 1.024;
static float    ms_per_tick = 0.9765625;
static char far *event;
static unsigned char flag70h = 0;
static void     interrupt(*old70h) (__CPPARGS);

volatile unsigned long int ticks_70h;

void            init70h(void)
{
    union REGS      regs;
    struct SREGS    sregs;

    unsigned int    event_seg,
                    event_off;

    if (flag70h != NEW70H) {
        old70h = getvect(IRQ8);
        setvect(IRQ8, new70h);

        event_seg = FP_SEG(event);
        event_off = FP_OFF(event);

        regs.x.ax = SET_EVENT;
        sregs.es = event_seg;
        regs.x.bx = event_off;
        regs.x.cx = LARGEST;
        regs.x.dx = LARGEST;
        int86x(0x15, &regs, &regs, &sregs);

        flag70h = NEW70H;
    }
}

void            quit70h(void)
{
    union REGS      regs;

    if (flag70h == NEW70H) {
        regs.x.ax = CANCEL_EVENT;
        int86(0x15, &regs, &regs);

        setvect(IRQ8, old70h);

        flag70h = 0;
    }
}

void interrupt  new70h(__CPPARGS)
{
    disable();
    ticks_70h++;
    enable();
    old70h();
}

unsigned long   time70h(unsigned long start, unsigned long stop)
{
    unsigned long   duration,
                    millisec;

    if (stop < start)
        return 0;
    else {
        duration = stop - start;
        millisec = duration * ms_per_tick;
        return millisec;
    }
}

void            delay70h(unsigned int delayms)
{
    unsigned long int delaybegin = 0;
    unsigned long int delayend = 0;
    unsigned int    delaytick;

    if (flag70h == NEW70H) {
        delaytick = delayms * tick_per_ms;
        delaybegin = ticks_70h;
        do {
            delayend = ticks_70h;
        } while ((delayend - delaybegin) < delaytick);
    } else {
        delaytick = delayms * 0.0182065;
        biostime(0, (long) &delaybegin);
        do {
            biostime(0, (long) &delayend);
        } while ((delayend - delaybegin) < delaytick);
    }
}

void            sound70h(int freq, int duration)
{
    int             byte;
    unsigned int    freq1;

    freq1 = PITCONST / freq;
    outportb(PITMODE, 0xb6);
    byte = (freq1 & 0xff);
    outportb(PIT2, byte);
    byte = (freq1 >> 8);
    outportb(PIT2, byte);
    byte = inportb(KBCTRL);
    outportb(KBCTRL, (byte | 3));

    delay70h(duration);
    outportb(KBCTRL, (byte & 0xfc));
}


*************************************************************************
tcint70.h

#ifdef __cpluspls
#  define __CPPARGS ...
#else
#  define __CPPARGS void
#endif

void interrupt  new70h(__CPPARGS);
void            init70h(void);
void            quit70h(void);
unsigned long   time70h(unsigned long, unsigned long);
void            delay70h(unsigned int);
void            sound70h(int, int);

extern volatile unsigned long int ticks_70h;

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