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151 lines
2.5 KiB
151 lines
2.5 KiB
/*****************************************************************************/
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// Copyright 2006 Adobe Systems Incorporated
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// All Rights Reserved.
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//
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// NOTICE: Adobe permits you to use, modify, and distribute this file in
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// accordance with the terms of the Adobe license agreement accompanying it.
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/*****************************************************************************/
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/* $Id: //mondo/dng_sdk_1_4/dng_sdk/source/dng_rational.cpp#1 $ */
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/* $DateTime: 2012/05/30 13:28:51 $ */
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/* $Change: 832332 $ */
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/* $Author: tknoll $ */
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/*****************************************************************************/
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#include "dng_rational.h"
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#include "dng_utils.h"
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/*****************************************************************************/
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real64 dng_srational::As_real64 () const
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{
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if (d)
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return (real64) n / (real64) d;
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else
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return 0.0;
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}
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/*****************************************************************************/
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void dng_srational::Set_real64 (real64 x, int32 dd)
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{
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if (x == 0.0)
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{
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*this = dng_srational (0, 1);
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}
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if (dd == 0)
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{
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real64 y = Abs_real64 (x);
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if (y >= 32768.0)
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{
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dd = 1;
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}
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else if (y >= 1.0)
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{
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dd = 32768;
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}
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else
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{
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dd = 32768 * 32768;
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}
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}
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*this = dng_srational (Round_int32 (x * dd), dd);
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}
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/*****************************************************************************/
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void dng_srational::ReduceByFactor (int32 factor)
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{
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while (n % factor == 0 &&
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d % factor == 0 &&
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d >= factor)
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{
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n /= factor;
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d /= factor;
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}
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}
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/*****************************************************************************/
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real64 dng_urational::As_real64 () const
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{
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if (d)
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return (real64) n / (real64) d;
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else
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return 0.0;
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}
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/*****************************************************************************/
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void dng_urational::Set_real64 (real64 x, uint32 dd)
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{
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if (x <= 0.0)
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{
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*this = dng_urational (0, 1);
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}
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if (dd == 0)
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{
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if (x >= 32768.0)
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{
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dd = 1;
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}
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else if (x >= 1.0)
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{
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dd = 32768;
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}
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else
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{
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dd = 32768 * 32768;
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}
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}
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*this = dng_urational (Round_uint32 (x * dd), dd);
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}
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/*****************************************************************************/
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void dng_urational::ReduceByFactor (uint32 factor)
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{
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while (n % factor == 0 &&
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d % factor == 0 &&
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d >= factor)
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{
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n /= factor;
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d /= factor;
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}
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}
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/*****************************************************************************/
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