X-Git-Url: https://git.ucc.asn.au/?p=ipdf%2Fcode.git;a=blobdiff_plain;f=src%2Farbint.cpp;fp=src%2Farbint.cpp;h=582d99a84752eaa7333cf153dc599f98aafd2ad1;hp=696dcd0312214597178099b1a08b61e60e8db921;hb=a2791dc25392472c9dc2c8a2f738f6695fc8d292;hpb=f1fab7ee4ee08ca10019450beda303ab71a12ee8

diff --git a/src/arbint.cpp b/src/arbint.cpp
index 696dcd0..582d99a 100644
--- a/src/arbint.cpp
+++ b/src/arbint.cpp
@@ -203,7 +203,10 @@ Arbint & Arbint::SubBasic(const Arbint & sub)
 	{
 		m_sign = !m_sign;
 		for (unsigned i = 0; i < m_digits.size(); ++i)
-			m_digits[i] = (~m_digits[i]) + 1;
+			m_digits[i] = (~m_digits[i]);
+		std::vector<digit_t> one_digits(m_digits.size(), 0L);
+		one_digits[0] = 1;
+		add_digits((digit_t*)m_digits.data(), (digit_t*)one_digits.data(), m_digits.size());
 	}
 	return *this;
 }