From 671f3f8ca44382386daf63c70140742e61200c2e Mon Sep 17 00:00:00 2001
From: Olivier Gayot <og@satcom1.com>
Date: Sat, 26 Aug 2017 00:15:58 +0200
Subject: Added a class "number" with comparison operators
Signed-off-by: Olivier Gayot <og@satcom1.com>
---
number.cpp | 58 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
number.h | 62 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
2 files changed, 120 insertions(+)
create mode 100644 number.cpp
create mode 100644 number.h
diff --git a/number.cpp b/number.cpp
new file mode 100644
index 0000000..e942cf2
--- /dev/null
+++ b/number.cpp
@@ -0,0 +1,58 @@
+#include "number.h"
+
+/* Comparison operators {{{ */
+
+bool
+number::operator<(const number &n) const
+{
+ const auto size = this->_operands.size();
+
+ if (size < n._operands.size()) {
+ return true;
+ }
+
+ if (size > n._operands.size()) {
+ return false;
+ }
+
+ /* Because first item is the least significant. */
+ auto l1(this->_operands);
+ auto l2(n._operands);
+
+ l1.reverse();
+ l2.reverse();
+
+ return l1 < l2;
+}
+
+bool
+number::operator>(const number &n) const
+{
+ return n.operator<(*this);
+}
+
+bool
+number::operator<=(const number &n) const
+{
+ return operator<(n) || operator==(n);
+}
+
+bool
+number::operator>=(const number &n) const
+{
+ return operator>(n) || operator==(n);
+}
+
+bool
+number::operator==(const number &n) const
+{
+ return _operands == n._operands;
+}
+
+bool
+number::operator!=(const number &n) const
+{
+ return _operands != n._operands;
+}
+
+/* }}} */
diff --git a/number.h b/number.h
new file mode 100644
index 0000000..c508a81
--- /dev/null
+++ b/number.h
@@ -0,0 +1,62 @@
+#pragma once
+
+#include <list>
+
+#include <cstdint>
+
+class number {
+public:
+ number() = default;
+
+ /**
+ * \brief Tells whether the number passed as parameter is strictly less
+ * than this number.
+ *
+ * \param n The number to compare with this number.
+ */
+ bool operator<(const number &n) const;
+
+ /**
+ * \brief Tells whether the number passed as parameter is strictly greater
+ * than this number.
+ *
+ * \param n The number to compare with this number.
+ */
+ bool operator>(const number &n) const;
+
+ /**
+ * \brief Tells whether the number passed as parameter is less than or
+ * equal to this number.
+ *
+ * \param n The number to compare with this number.
+ */
+ bool operator<=(const number &n) const;
+
+ /**
+ * \brief Tells whether the number passed as parameter is greater than or
+ * equal to this number.
+ *
+ * \param n The number to compare with this number.
+ */
+ bool operator>=(const number &n) const;
+
+ /**
+ * \brief Tells whether the number passed as parameter is equal to this
+ * number.
+ *
+ * \param n The number to compare with this number.
+ */
+ bool operator==(const number &n) const;
+
+ /**
+ * \brief Tells whether the number passed as parameter is not equal to this
+ * number.
+ *
+ * \param n The number to compare with this number.
+ */
+ bool operator!=(const number &n) const;
+
+private:
+ /* First item is the least significant. */
+ std::list<std::uint64_t> _operands;
+};
--
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