From 793d231025b75a497425a600a4ab40b9cbf55221 Mon Sep 17 00:00:00 2001
From: Chris Dyer <cdyer@cs.cmu.edu>
Date: Thu, 3 Mar 2011 16:02:45 -0500
Subject: nasty overflow related bug when comparing prob_t's, which coerced
 them through double, causing sometimes bad results when weights were high

---
 utils/logval.h | 29 +++++++++++++----------------
 1 file changed, 13 insertions(+), 16 deletions(-)

diff --git a/utils/logval.h b/utils/logval.h
index da0aa2b0..6fdc2c42 100644
--- a/utils/logval.h
+++ b/utils/logval.h
@@ -200,6 +200,16 @@ LogVal<T> pow(const LogVal<T>& b, const T& e) {
   return b.pow(e);
 }
 
+template <class T>
+bool operator==(const LogVal<T>& lhs, const LogVal<T>& rhs) {
+  return (lhs.v_ == rhs.v_) && (lhs.s_ == rhs.s_);
+}
+
+template <class T>
+bool operator!=(const LogVal<T>& lhs, const LogVal<T>& rhs) {
+  return !(lhs == rhs);
+}
+
 template <class T>
 bool operator<(const LogVal<T>& lhs, const LogVal<T>& rhs) {
   if (lhs.s_ == rhs.s_) {
@@ -209,35 +219,22 @@ bool operator<(const LogVal<T>& lhs, const LogVal<T>& rhs) {
   }
 }
 
-#if 0
 template <class T>
 bool operator<=(const LogVal<T>& lhs, const LogVal<T>& rhs) {
-  return (lhs.v_ <= rhs.v_);
+  return (lhs < rhs) || (lhs == rhs);
 }
 
 template <class T>
 bool operator>(const LogVal<T>& lhs, const LogVal<T>& rhs) {
-  return (lhs.v_ > rhs.v_);
+  return !(lhs <= rhs);
 }
 
 template <class T>
 bool operator>=(const LogVal<T>& lhs, const LogVal<T>& rhs) {
-  return (lhs.v_ >= rhs.v_);
+  return !(lhs < rhs);
 }
-#endif
-
 
 template <class T>
 std::size_t hash_value(const LogVal<T>& x) { return x.hash_impl(); }
 
-template <class T>
-bool operator==(const LogVal<T>& lhs, const LogVal<T>& rhs) {
-  return (lhs.v_ == rhs.v_) && (lhs.s_ == rhs.s_);
-}
-
-template <class T>
-bool operator!=(const LogVal<T>& lhs, const LogVal<T>& rhs) {
-  return !(lhs == rhs);
-}
-
 #endif
-- 
cgit v1.2.3