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Tricks of the Windows Gam…ming Gurus (2nd Edition)
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Disc2.iso
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vc98
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crt
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src
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div.c
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C/C++ Source or Header
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1998-06-17
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1KB
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54 lines
/***
*div.c - contains the div routine
*
* Copyright (c) 1989-1997, Microsoft Corporation. All rights reserved.
*
*Purpose:
* Performs a signed divide and returns quotient
* and remainder.
*
*******************************************************************************/
#include <cruntime.h>
#include <stdlib.h>
/***
*div_t div(int numer, int denom) - do signed divide
*
*Purpose:
* This routine does an divide and returns the results.
* Since we don't know how the Intel 860 does division, we'd
* better make sure that we have done it right.
*
*Entry:
* int numer - Numerator passed in on stack
* int denom - Denominator passed in on stack
*
*Exit:
* returns quotient and remainder in structure
*
*Exceptions:
* No validation is done on [denom]* thus, if [denom] is 0,
* this routine will trap.
*
*******************************************************************************/
div_t __cdecl div (
int numer,
int denom
)
{
div_t result;
result.quot = numer / denom;
result.rem = numer % denom;
if (numer < 0 && result.rem > 0) {
/* did division wrong; must fix up */
++result.quot;
result.rem -= denom;
}
return result;
}