X-Git-Url: https://git.ucc.asn.au/?p=ipdf%2Fcode.git;a=blobdiff_plain;f=src%2Farbint.cpp;fp=src%2Farbint.cpp;h=ccde0dd75f54363d90c4e1a0e9ad104fbdc6402a;hp=0000000000000000000000000000000000000000;hb=33356addacfe4296ecb613c6c4696f082e351159;hpb=54798ed9050d0742c6cdab067fad0cc364b1d6b2

diff --git a/src/arbint.cpp b/src/arbint.cpp
new file mode 100644
index 0000000..ccde0dd
--- /dev/null
+++ b/src/arbint.cpp
@@ -0,0 +1,52 @@
+#include "arbint.h"
+#include <algorithm>
+#include <cstring>
+using namespace std;
+
+/*
+static bool addc(uint32_t a, uint32_t b, uint32_t * r)
+{
+	volatile uint32_t carry = false;
+	volatile uint32_t result = a + b;
+	asm volatile
+	(
+		"jc 1f;"
+		"mov $0, %%eax;"
+		"1:"
+		: "=a" (carry)
+	);
+	*r = result;	
+	return (carry == 1);
+}
+*/
+
+namespace IPDF
+{
+
+Arbint::Arbint(int64_t i) : m_words(2), m_sign(false)
+{
+	m_sign = i < 0;
+	memcpy(m_words.data(), &i, sizeof(int64_t));
+}
+
+string Arbint::Str() const
+{
+	string s("");
+	for (unsigned i = 0; i < m_words.size(); ++i)
+	{
+		uint32_t w = m_words[i];
+		do
+		{
+			uint32_t q = w % 10;
+			w /= 10;
+			s += ('0' + q);
+		}
+		while (w > 0);
+		if (i+1 < m_words.size()) s += ",";	
+	}
+	if (m_sign) s += '-';
+	reverse(s.begin(), s.end());
+	return s;
+}
+
+}