khtml/svg/animation/SMILTime.cpp

   1 /*
   2  * Copyright (C) 2008 Apple Inc. All Rights Reserved.
   3  *
   4  * Redistribution and use in source and binary forms, with or without
   5  * modification, are permitted provided that the following conditions
   6  * are met:
   7  * 1. Redistributions of source code must retain the above copyright
   8  *    notice, this list of conditions and the following disclaimer.
   9  * 2. Redistributions in binary form must reproduce the above copyright
  10  *    notice, this list of conditions and the following disclaimer in the
  11  *    documentation and/or other materials provided with the distribution.
  12  *
  13  * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
  14  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  15  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  16  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE INC. OR
  17  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
  18  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
  19  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
  20  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
  21  * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  22  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  23  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  24  */
  25
  26 #include "config.h"
  27 #if ENABLE(SVG)
  28 #include "SMILTime.h"
  29
  30 #include <float.h>
  31
  32 using namespace WebCore;
  33
  34 const double SMILTime::unresolvedValue = DBL_MAX;
  35 // Just a big value smaller than DBL_MAX. Our times are relative to 0, we don't really need the full range.
  36 const double SMILTime::indefiniteValue = FLT_MAX;
  37
  38 SMILTime WebCore::operator+(const SMILTime& a, const SMILTime& b) {
  39     if (a.isUnresolved() || b.isUnresolved())
  40         return SMILTime::unresolved();
  41     if (a.isIndefinite() || b.isIndefinite())
  42         return SMILTime::indefinite();
  43     return a.value() + b.value();
  44 }
  45
  46 SMILTime WebCore::operator-(const SMILTime& a, const SMILTime& b) {
  47     if (a.isUnresolved() || b.isUnresolved())
  48         return SMILTime::unresolved();
  49     if (a.isIndefinite() || b.isIndefinite())
  50         return SMILTime::indefinite();
  51     return a.value() - b.value();
  52 }
  53
  54 SMILTime WebCore::operator*(const SMILTime& a,  const SMILTime& b) {
  55     if (a.isUnresolved() || b.isUnresolved())
  56         return SMILTime::unresolved();
  57     if (a.value() == 0 || b.value() == 0)
  58         return SMILTime(0);
  59     if (a.isIndefinite() || b.isIndefinite())
  60         return SMILTime::indefinite();
  61     return a.value() * b.value();
  62 }
  63 #endif
  64