Bezier bounds rectangles are calculated correctly

[ipdf/code.git] / src / arbint.h

diff --git a/src/arbint.h b/src/arbint.h
index f137796..468785f 100644 (file)
--- a/src/arbint.h
+++ b/src/arbint.h
@@ -14,18 +14,19 @@ namespace IPDF
        class Arbint
        {
                public:
-                       typedef int64_t digit_t;
+                       typedef uint64_t digit_t;
                
-                       Arbint(digit_t i);
+                       Arbint(int64_t i);
                        Arbint(const std::vector<digit_t> & digits);
                        Arbint(unsigned n, digit_t d0, ...);
                        Arbint(const std::string & str, const std::string & base="0123456789");
-                       ~Arbint() {}
+                       virtual ~Arbint() {}
                        Arbint(const Arbint & cpy);
                        
-                       digit_t AsDigit() const 
+                       int64_t AsDigit() const
                        {
-                               return (m_sign) ? -m_digits[0] : m_digits[0];
+                               int64_t digit = (m_digits.size() == 1) ? m_digits[0] : 0xBADF00D;
+                               return (m_sign) ? -digit : digit;
                        }
                        
                        inline bool Sign() const {return m_sign;}
@@ -44,6 +45,9 @@ namespace IPDF
                        Arbint & operator*=(const Arbint & mul);
                        void Division(const Arbint & div, Arbint & result, Arbint & modulo) const;
                        
+                       Arbint & operator<<=(unsigned amount);
+                       Arbint & operator>>=(unsigned amount);
+                       
                        inline Arbint operator+(const Arbint & add) const 
                        {
                                Arbint a(*this);
@@ -56,6 +60,20 @@ namespace IPDF
                                a -= add;
                                return a;
                        }
+
+                       inline Arbint operator-()
+                       {
+                               Arbint a(*this);
+                               a.m_sign = !a.m_sign;
+                               return a;
+                       }
+                       
+                       inline Arbint operator-() const
+                       {
+                               Arbint a(*this);
+                               a.m_sign = !a.m_sign;
+                               return a;
+                       }
                        
                        inline Arbint operator*(const Arbint & mul) const
                        {
@@ -88,6 +106,7 @@ namespace IPDF
                        
                        bool operator==(const Arbint & equ) const;
                        bool operator<(const Arbint & less) const;
+                       
 
                        inline bool operator!=(const Arbint & equ) const 
                        {
@@ -100,20 +119,54 @@ namespace IPDF
                        
                        inline bool operator>=(const Arbint & leq) const 
                        {
-                               return (this->operator==(leq) || this->operator<(leq));
+                               return (this->operator==(leq) || this->operator>(leq));
                        }
                        inline bool operator>(const Arbint & grea) const
                        {
                                return !(this->operator<=(grea));
                        }
-                       
+                       inline Arbint operator>>(unsigned amount) const
+                       {
+                               Arbint result(*this);
+                               result >>= amount;
+                               return result;
+                       }
+                       inline Arbint operator<<(unsigned amount) const
+                       {
+                               Arbint result(*this);
+                               result <<= amount;
+                               return result;
+                       }
                        bool IsZero() const;
+
+                       inline operator double() const
+                       {
+                               double acc = 0;
+                               for (int i = m_digits.size()-1; i >= 0; --i)
+                               {
+                                       acc += (double)m_digits[i];
+                                       acc *= (double)UINT64_MAX + 1.0;
+                               }
+                               if (m_sign) acc *= -1;
+                               return acc;
+                       }
+                       inline operator int64_t() const {return AsDigit();}
+                       //inline operator int() const {return int(AsDigit());}
                        
                        unsigned Shrink();
+                       
+                       inline Arbint Abs() const {Arbint a(*this); a.m_sign = false; return a;}
                private:                
                                
                        Arbint & AddBasic(const Arbint & add);
                        Arbint & SubBasic(const Arbint & sub);
+                       
+                       void GrowDigit(digit_t new_msd); // add a new most significant digit
+                       
+                       bool GetBit(unsigned i) const;
+                       void BitClear(unsigned i);
+                       void BitSet(unsigned i);
+                       
        
                        std::vector<digit_t> m_digits;
                        bool m_sign;
@@ -121,13 +174,18 @@ namespace IPDF
                        
        };      
 
+
+
 extern "C"
 {
-       typedef int64_t digit_t;
+       typedef uint64_t digit_t;
        digit_t add_digits(digit_t * dst, digit_t * add, digit_t size);
        digit_t sub_digits(digit_t * dst, digit_t * add, digit_t size);
        digit_t mul_digits(digit_t * dst, digit_t mul, digit_t size);
+       digit_t div_digits(digit_t * dst, digit_t div, digit_t size, digit_t * rem);
 }
 
+
+
 }
 #endif //_ARBINT_H