7 files changed, 59 insertions, 39 deletions
diff --git a/utils/Makefile.am b/utils/Makefile.am
index c5fedb78..a22b6727 100644
--- a/utils/Makefile.am
+++ b/utils/Makefile.am
@@ -7,9 +7,10 @@ noinst_PROGRAMS = \
   m_test \
   weights_test \
   logval_test \
-  small_vector_test
+  small_vector_test \
+  sv_test
 
-TESTS = ts small_vector_test logval_test weights_test dict_test m_test
+TESTS = ts small_vector_test logval_test weights_test dict_test m_test sv_test
 
 noinst_LIBRARIES = libutils.a
 
@@ -50,7 +51,6 @@ libutils_a_SOURCES = \
   sparse_vector.h \
   static_utoa.h \
   stringlib.h \
-  swap_pod.h \
   tdict.h \
   timing_stats.h \
   utoa.h \
@@ -101,6 +101,8 @@ logval_test_SOURCES = logval_test.cc
 logval_test_LDADD = libutils.a $(BOOST_UNIT_TEST_FRAMEWORK_LDFLAGS) $(BOOST_UNIT_TEST_FRAMEWORK_LIBS)
 small_vector_test_SOURCES = small_vector_test.cc
 small_vector_test_LDADD = libutils.a $(BOOST_UNIT_TEST_FRAMEWORK_LDFLAGS) $(BOOST_UNIT_TEST_FRAMEWORK_LIBS)
+sv_test_SOURCES = sv_test.cc
+sv_test_LDADD = libutils.a $(BOOST_UNIT_TEST_FRAMEWORK_LDFLAGS) $(BOOST_UNIT_TEST_FRAMEWORK_LIBS)
 
 ################################################################
 # do NOT NOT NOT add any other -I includes NO NO NO NO NO ######
diff --git a/utils/small_vector.h b/utils/small_vector.h
index c8a69927..280ab72c 100644
--- a/utils/small_vector.h
+++ b/utils/small_vector.h
@@ -14,7 +14,6 @@
 #include <stdint.h>
 #include <new>
 #include <stdint.h>
-#include "swap_pod.h"
 #include <boost/functional/hash.hpp>
 
 //sizeof(T)/sizeof(T*)>1?sizeof(T)/sizeof(T*):1
@@ -278,8 +277,15 @@ public:
     return !(a==b);
   }
 
-  void swap(Self& o) {
-    swap_pod(*this,o);
+  inline void swap(Self& o) {
+    const unsigned s=sizeof(SmallVector<T,SV_MAX>);
+    char tmp[s];
+    void *pt=static_cast<void*>(tmp);
+    void *pa=static_cast<void*>(this);
+    void *pb=static_cast<void*>(&o);
+    std::memcpy(pt,pa,s);
+    std::memcpy(pa,pb,s);
+    std::memcpy(pb,pt,s);
   }
 
   inline std::size_t hash_impl() const {
diff --git a/utils/small_vector_test.cc b/utils/small_vector_test.cc
index cded4619..a4eb89ae 100644
--- a/utils/small_vector_test.cc
+++ b/utils/small_vector_test.cc
@@ -82,6 +82,18 @@ BOOST_AUTO_TEST_CASE(LargerThan2) {
   BOOST_CHECK(cc.size() == 0);
 }
 
+BOOST_AUTO_TEST_CASE(SwapSV) {
+  SmallVectorInt v;
+  SmallVectorInt v2(2, 10);
+  SmallVectorInt v3(2, 10);
+  BOOST_CHECK(v2 == v3);
+  BOOST_CHECK(v != v3);
+  v.swap(v2);
+  BOOST_CHECK(v == v3);
+  SmallVectorInt v4;
+  BOOST_CHECK(v4 == v2);
+}
+
 BOOST_AUTO_TEST_CASE(Small) {
   SmallVectorInt v;
   SmallVectorInt v1(1,0);
diff --git a/utils/sv_test.cc b/utils/sv_test.cc
new file mode 100644
index 00000000..c7ac9e54
--- /dev/null
+++ b/utils/sv_test.cc
@@ -0,0 +1,24 @@
+#define BOOST_TEST_MODULE WeightsTest
+#include <boost/test/unit_test.hpp>
+#include <boost/test/floating_point_comparison.hpp>
+#include "sparse_vector.h"
+
+using namespace std;
+
+BOOST_AUTO_TEST_CASE(Equality) {
+  SparseVector<double> x;
+  SparseVector<double> y;
+  x.set_value(1,-1);
+  y.set_value(1,-1);
+  BOOST_CHECK(x == y);
+}
+
+BOOST_AUTO_TEST_CASE(Division) {
+  SparseVector<double> x;
+  SparseVector<double> y;
+  x.set_value(1,1);
+  y.set_value(1,-1);
+  BOOST_CHECK(!(x == y));
+  x /= -1;
+  BOOST_CHECK(x == y);
+}
diff --git a/utils/swap_pod.h b/utils/swap_pod.h
deleted file mode 100644
index bb9a830d..00000000
--- a/utils/swap_pod.h
+++ /dev/null
@@ -1,23 +0,0 @@
-#ifndef SWAP_POD_H
-#define SWAP_POD_H
-
-//for swapping objects of the same concrete type where just swapping their bytes will work.  will at least work on plain old data.
-
-#include <algorithm> // not used, but people who use this will want to bring std::swap in anyway
-#include <cstring>
-
-template <class T>
-inline void swap_pod(T &a,T &b) {
-  using namespace std;
-  const unsigned s=sizeof(T);
-  char tmp[s];
-  void *pt=(void*)tmp;
-  void *pa=(void*)&a;
-  void *pb=(void*)&b;
-  memcpy(pt,pa,s);
-  memcpy(pa,pb,s);
-  memcpy(pb,pt,s);
-}
-
-
-#endif
diff --git a/utils/value_array.h b/utils/value_array.h
index 12fc9d87..e59349b5 100644
--- a/utils/value_array.h
+++ b/utils/value_array.h
@@ -1,8 +1,6 @@
 #ifndef VALUE_ARRAY_H
 #define VALUE_ARRAY_H
 
-//TODO: option for non-constructed version (type_traits pod?), option for small array optimization (if sz < N, store inline in union, see small_vector.h)
-
 #define DBVALUEARRAY(x) x
 
 #include <cstdlib>
@@ -30,8 +28,7 @@
 
 // valarray like in that size is fixed (so saves space compared to vector), but same interface as vector (less resize/push_back/insert, of course)
 template <class T, class A = std::allocator<T> >
-class ValueArray : A // private inheritance so stateless allocator adds no size.
-{
+class ValueArray : A { // private inheritance so stateless allocator adds no size.
   typedef ValueArray<T,A> Self;
 public:
 #if VALUE_ARRAY_OSTREAM
@@ -323,14 +320,14 @@ private:
   //friend class boost::serialization::access;
 public:
   template <class Archive>
-  void save(Archive& ar, unsigned int version) const
+  void save(Archive& ar, unsigned int /*version*/) const
   {
     ar << sz;
     for (size_type i = 0; i != sz; ++i) ar << at(i);
   }
 
   template <class Archive>
-  void load(Archive& ar, unsigned int version)
+  void load(Archive& ar, unsigned int /*version*/)
   {
     size_type s;
     ar >> s;
diff --git a/utils/weights.cc b/utils/weights.cc
index effdfc5e..1f66c441 100644
--- a/utils/weights.cc
+++ b/utils/weights.cc
@@ -127,9 +127,11 @@ void Weights::InitSparseVector(const vector<weight_t>& dv,
 }
 
 void Weights::SanityCheck(const vector<weight_t>& w) {
-  for (unsigned i = 0; i < w.size(); ++i) {
-    assert(!std::isnan(w[i]));
-    assert(!std::isinf(w[i]));
+  for (unsigned i = 1; i < w.size(); ++i) {
+    if (std::isnan(w[i]) || std::isinf(w[i])) {
+      cerr << FD::Convert(i) << " has bad weight: " << w[i] << endl;
+      abort();
+    }
   }
 }
 
@@ -161,7 +163,7 @@ string Weights::GetString(const vector<weight_t>& w,
                           bool hide_zero_value_features) {
     ostringstream os;
     os.precision(17);
-    int nf = FD::NumFeats();
+    const unsigned nf = FD::NumFeats();
     for (unsigned i = 1; i < nf; i++) {
         weight_t val = (i < w.size() ? w[i] : 0.0);
         if (hide_zero_value_features && val == 0.0) {