/*
Copyright (C) Magna Carta Software, Inc. 1990, 1991.  All Rights Reserved.
C COMMUNICATIONS TOOLKIT v1.0
CCTUTIL.C -- Utility Functions for CCT.
*/

#define CCT_DEVELOPMENT
#if (defined(CCTW) || defined(_WINDOWS))
    #include <windows.h>
#endif
#include <dos.h>
#include <compat.h>
#if defined(MSC)
/*  #include <conio.h> */
#endif
/* #include <stdio.h> */
#include <stdlib.h>


#if !defined(TYPES_DEFINED)
    typedef unsigned char   BYTE;
    typedef unsigned short  WORD;
    typedef unsigned long   DWORD;
    #define TYPES_DEFINED
#endif


#define LOW_TIME            0X46C


/*
MS_PAUSE -- Introduce a delay for x milliseconds calibrated to 1/18th sec.
This function accesses the time through the BIOS.
The variable "duration" is measured in milliseconds (e.g. 200 <=> 0.2 sec.)
*/
void ms_pause(WORD duration)
{
    WORD ticks;
    WORD ticksnow;

    /* CONVERT MILLISECONDS TO 18ths OF A SECOND */
    ticks = max(duration /55, 1);
    for (; ticks > 0; --ticks) {
        ticksnow = (volatile WORD) peek(0, LOW_TIME);
        _enable();
#if defined(_MSC_VER)
        while (ticksnow == (*(volatile WORD *) &(peek(0, LOW_TIME))));
#else
        while (ticksnow == (volatile WORD) peek(0, LOW_TIME));
#endif
    }
}