1 files changed, 0 insertions, 174 deletions
diff --git a/decoder/logval.h b/decoder/logval.h
deleted file mode 100644
index 37f14ae5..00000000
--- a/decoder/logval.h
+++ /dev/null
@@ -1,174 +0,0 @@
-#ifndef LOGVAL_H_
-#define LOGVAL_H_
-
-#define LOGVAL_CHECK_NEG false
-
-#include <iostream>
-#include <cstdlib>
-#include <cmath>
-#include <limits>
-
-template <typename T>
-class LogVal {
- public:
-  LogVal() : s_(), v_(-std::numeric_limits<T>::infinity()) {}
-  explicit LogVal(double x) : s_(std::signbit(x)), v_(s_ ? std::log(-x) : std::log(x)) {}
-  LogVal(int x) : s_(x<0), v_(s_ ? std::log(-x) : std::log(x)) {}
-  LogVal(unsigned x) : s_(0), v_(std::log(x)) { }
-  LogVal(double lnx,bool sign) : s_(sign),v_(lnx) {}
-  static LogVal<T> exp(T lnx) { return LogVal(lnx,false); }
-
-  static LogVal<T> One() { return LogVal(1); }
-  static LogVal<T> Zero() { return LogVal(); }
-  static LogVal<T> e() { return LogVal(1,false); }
-  void logeq(const T& v) { s_ = false; v_ = v; }
-
-  LogVal& operator+=(const LogVal& a) {
-    if (a.v_ == -std::numeric_limits<T>::infinity()) return *this;
-    if (a.s_ == s_) {
-      if (a.v_ < v_) {
-        v_ = v_ + log1p(std::exp(a.v_ - v_));
-      } else {
-        v_ = a.v_ + log1p(std::exp(v_ - a.v_));
-      }
-    } else {
-      if (a.v_ < v_) {
-        v_ = v_ + log1p(-std::exp(a.v_ - v_));
-      } else {
-        v_ = a.v_ + log1p(-std::exp(v_ - a.v_));
-        s_ = !s_;
-      }
-    }
-    return *this;
-  }
-
-  LogVal& operator*=(const LogVal& a) {
-    s_ = (s_ != a.s_);
-    v_ += a.v_;
-    return *this;
-  }
-
-  LogVal& operator/=(const LogVal& a) {
-    s_ = (s_ != a.s_);
-    v_ -= a.v_;
-    return *this;
-  }
-
-  LogVal& operator-=(const LogVal& a) {
-    LogVal b = a;
-    b.invert();
-    return *this += b;
-  }
-
-  // LogVal(fabs(log(x)),x.s_)
-  friend LogVal abslog(LogVal x) {
-    if (x.v_<0) x.v_=-x.v_;
-    return x;
-  }
-
-  LogVal& poweq(const T& power) {
-#if LOGVAL_CHECK_NEG
-    if (s_) {
-      std::cerr << "poweq(T) not implemented when s_ is true\n";
-      std::abort();
-    } else
-#endif
-      v_ *= power;
-    return *this;
-  }
-
-  void invert() { s_ = !s_; }
-
-  LogVal pow(const T& power) const {
-    LogVal res = *this;
-    res.poweq(power);
-    return res;
-  }
-
-  LogVal root(const T& root) const {
-    return pow(1/root);
-  }
-
-  operator T() const {
-    if (s_) return -std::exp(v_); else return std::exp(v_);
-  }
-
-  bool s_;
-  T v_;
-};
-
-// copy elision - as opposed to explicit copy of LogVal<T> const& o1, we should be able to construct Logval r=a+(b+c) as a single result in place in r.  todo: return std::move(o1) - C++0x
-template<typename T>
-LogVal<T> operator+(LogVal<T> o1, const LogVal<T>& o2) {
-  o1 += o2;
-  return o1;
-}
-
-template<typename T>
-LogVal<T> operator*(LogVal<T> o1, const LogVal<T>& o2) {
-  o1 *= o2;
-  return o1;
-}
-
-template<typename T>
-LogVal<T> operator/(LogVal<T> o1, const LogVal<T>& o2) {
-  o1 /= o2;
-  return o1;
-}
-
-template<typename T>
-LogVal<T> operator-(LogVal<T> o1, const LogVal<T>& o2) {
-  o1 -= o2;
-  return o1;
-}
-
-template<typename T>
-T log(const LogVal<T>& o) {
-#ifdef LOGVAL_CHECK_NEG
-  if (o.s_) return log(-1.0);
-#endif
-  return o.v_;
-}
-
-template <typename T>
-LogVal<T> pow(const LogVal<T>& b, const T& e) {
-  return b.pow(e);
-}
-
-template <typename T>
-bool operator<(const LogVal<T>& lhs, const LogVal<T>& rhs) {
-  if (lhs.s_ == rhs.s_) {
-    return (lhs.v_ < rhs.v_);
-  } else {
-    return lhs.s_ > rhs.s_;
-  }
-}
-
-#if 0
-template <typename T>
-bool operator<=(const LogVal<T>& lhs, const LogVal<T>& rhs) {
-  return (lhs.v_ <= rhs.v_);
-}
-
-template <typename T>
-bool operator>(const LogVal<T>& lhs, const LogVal<T>& rhs) {
-  return (lhs.v_ > rhs.v_);
-}
-
-template <typename T>
-bool operator>=(const LogVal<T>& lhs, const LogVal<T>& rhs) {
-  return (lhs.v_ >= rhs.v_);
-}
-#endif
-
-template <typename T>
-bool operator==(const LogVal<T>& lhs, const LogVal<T>& rhs) {
-  return (lhs.v_ == rhs.v_) && (lhs.s_ == rhs.s_);
-}
-
-template <typename T>
-bool operator!=(const LogVal<T>& lhs, const LogVal<T>& rhs) {
-  return !(lhs == rhs);
-}
-
-#endif