X-Git-Url: https://git.ucc.asn.au/?p=ipdf%2Fcode.git;a=blobdiff_plain;f=src%2Farbint.h;h=468785f315dd81b2311af6bfb77959cd81430672;hp=06008e072fcb3e5df96e303ca17be7b08f3c26a0;hb=dfd021b1505fb3924ae103d8aa27c6200d6ec3fd;hpb=924cb525f587c58440c43bcae6ccfd9b2e41c99c

diff --git a/src/arbint.h b/src/arbint.h
index 06008e0..468785f 100644
--- a/src/arbint.h
+++ b/src/arbint.h
@@ -25,7 +25,7 @@ namespace IPDF
 			
 			int64_t AsDigit() const
 			{
-				int64_t digit = (m_digits.size() == 1) ? m_digits[0] : 0x7FFFFFFFFFFFFFFF;
+				int64_t digit = (m_digits.size() == 1) ? m_digits[0] : 0xBADF00D;
 				return (m_sign) ? -digit : digit;
 			}
 			
@@ -68,6 +68,13 @@ namespace IPDF
 				return a;
 			}
 			
+			inline Arbint operator-() const
+			{
+				Arbint a(*this);
+				a.m_sign = !a.m_sign;
+				return a;
+			}
+			
 			inline Arbint operator*(const Arbint & mul) const
 			{
 				Arbint a(*this);
@@ -99,6 +106,7 @@ namespace IPDF
 			
 			bool operator==(const Arbint & equ) const;
 			bool operator<(const Arbint & less) const;
+			
 
 			inline bool operator!=(const Arbint & equ) const 
 			{
@@ -130,11 +138,11 @@ namespace IPDF
 				return result;
 			}
 			bool IsZero() const;
-			
-			inline operator double() const 
+
+			inline operator double() const
 			{
 				double acc = 0;
-				for(int i = m_digits.size()-1; i >= 0; --i)
+				for (int i = m_digits.size()-1; i >= 0; --i)
 				{
 					acc += (double)m_digits[i];
 					acc *= (double)UINT64_MAX + 1.0;
@@ -153,6 +161,8 @@ namespace IPDF
 			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);