time.h

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00001 /* === S Y N F I G ========================================================= */
00021 /* ========================================================================= */
00022 
00023 /* === S T A R T =========================================================== */
00024 
00025 #ifndef __SYNFIG_TIME_H
00026 #define __SYNFIG_TIME_H
00027 
00028 /* === H E A D E R S ======================================================= */
00029 
00030 #include "string_decl.h"
00031 
00032 /* === M A C R O S ========================================================= */
00033 
00034 /* === T Y P E D E F S ===================================================== */
00035 
00036 /* === C L A S S E S & S T R U C T S ======================================= */
00037 
00038 namespace synfig {
00039 
00044 class Time
00045 {
00046 public:
00047     typedef double value_type;
00048 
00052     enum Format
00053     {
00054         FORMAT_NORMAL=0,        
00055         FORMAT_NOSPACES=(1<<0), 
00056         FORMAT_FULL=(1<<1),     
00057         FORMAT_VIDEO=(1<<2),    
00058 
00059         FORMAT_END=(1<<4)       
00060     }; // END of enum Format
00061 
00062 private:
00063     value_type value_;
00064 
00065     static const value_type epsilon_() { return static_cast<value_type>(0.0005); }
00066 
00067 public:
00068     Time() { }
00069 
00070     Time(const value_type &x):value_(x) { }
00071 
00072     Time(int x):value_(x) { }
00073 
00074     Time(int hour, int minute, float second):value_(static_cast<value_type>(second+hour*3600+minute*60)) { }
00075 
00077 
00083     Time(const String &string, float fps=0);
00084 
00086     static const Time begin() { return static_cast<synfig::Time>(-32767.0f*512.0f); }
00087 
00089     static const Time end() { return static_cast<synfig::Time>(32767.0f*512.0f); }
00090 
00092     static const Time zero() { return static_cast<synfig::Time>(0); }
00093 
00095     static const Time epsilon() { return static_cast<synfig::Time>(epsilon_()); }
00096 
00098 
00099     String get_string(float fps=0, Time::Format format=FORMAT_NORMAL)const;
00100 
00102     bool is_valid()const;
00103 
00105     Time round(float fps)const;
00106 
00107     bool is_equal(const Time& rhs)const { return (value_>rhs.value_)?value_-rhs.value_<=epsilon_():rhs.value_-value_<=epsilon_(); }
00108     bool is_less_than(const Time& rhs)const { return rhs.value_-value_ > epsilon_(); }
00109     bool is_more_than(const Time& rhs)const { return value_-rhs.value_ > epsilon_(); }
00110 
00111     operator double()const { return value_; }
00112 
00113     template<typename U> bool operator<(const U& rhs)const { return value_<rhs; }
00114     template<typename U> bool operator>(const U& rhs)const { return value_>rhs; }
00115     template<typename U> bool operator<=(const U& rhs)const { return value_<=rhs; }
00116     template<typename U> bool operator>=(const U& rhs)const { return value_>=rhs; }
00117     template<typename U> bool operator==(const U& rhs)const { return value_==rhs; }
00118     template<typename U> bool operator!=(const U& rhs)const { return value_!=rhs; }
00119 
00120 #if 0
00121     bool operator<(const Time& rhs)const { return value_<rhs.value_; }
00122     bool operator>(const Time& rhs)const { return value_>rhs.value_; }
00123     bool operator<=(const Time& rhs)const { return value_<=rhs.value_; }
00124     bool operator>=(const Time& rhs)const { return value_>=rhs.value_; }
00125     bool operator==(const Time& rhs)const { return value_==rhs.value_; }
00126     bool operator!=(const Time& rhs)const { return value_!=rhs.value_; }
00127 #else
00128     bool operator<(const Time& rhs)const { return is_less_than(rhs); }
00129     bool operator>(const Time& rhs)const { return is_more_than(rhs); }
00130     bool operator<=(const Time& rhs)const { return is_less_than(rhs)||is_equal(rhs); }
00131     bool operator>=(const Time& rhs)const { return is_more_than(rhs)||is_equal(rhs); }
00132     bool operator==(const Time& rhs)const { return is_equal(rhs); }
00133     bool operator!=(const Time& rhs)const { return !is_equal(rhs); }
00134 #endif
00135 
00136     template<typename U> const Time& operator+=(const U &rhs) { value_+=static_cast<value_type>(rhs); return *this; }
00137     template<typename U> const Time& operator-=(const U &rhs) { value_-=static_cast<value_type>(rhs); return *this; }
00138     template<typename U> const Time& operator*=(const U &rhs) { value_*=static_cast<value_type>(rhs); return *this; }
00139     template<typename U> const Time& operator/=(const U &rhs) { value_/=static_cast<value_type>(rhs); return *this; }
00140 
00141     template<typename U> Time operator+(const U &rhs)const { return value_+static_cast<value_type>(rhs); }
00142     template<typename U> Time operator-(const U &rhs)const { return value_-static_cast<value_type>(rhs); }
00143     template<typename U> Time operator*(const U &rhs)const { return value_*static_cast<value_type>(rhs); }
00144     template<typename U> Time operator/(const U &rhs)const { return value_/static_cast<value_type>(rhs); }
00145 
00146     Time operator-()const { return -value_; }
00147 }; // END of class Time
00148 
00150 
00151 inline Time::Format operator|(Time::Format lhs, Time::Format rhs)
00152 { return static_cast<Time::Format>((int)lhs|(int)rhs); }
00153 
00155 
00158 inline bool operator<=(Time::Format lhs, Time::Format rhs)
00159 { return (static_cast<int>(lhs) & static_cast<int>(rhs))==static_cast<int>(rhs); }
00160 
00161 }; // END of namespace synfig
00162 
00163 /* === E N D =============================================================== */
00164 
00165 #endif

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