From 01817eb65cfc8f40ae5200b6dd238c86f7e8c915 Mon Sep 17 00:00:00 2001
From: Cristian Cadar <cristic@cs.stanford.edu>
Date: Fri, 19 Oct 2012 09:19:20 +0000
Subject: Added missing header file (part of the last patch).

git-svn-id: https://llvm.org/svn/llvm-project/klee/trunk@166277 91177308-0d34-0410-b5e6-96231b3b80d8
---
 include/klee/util/ArrayExprHash.h | 135 ++++++++++++++++++++++++++++++++++++++
 1 file changed, 135 insertions(+)
 create mode 100644 include/klee/util/ArrayExprHash.h

(limited to 'include')

diff --git a/include/klee/util/ArrayExprHash.h b/include/klee/util/ArrayExprHash.h
new file mode 100644
index 00000000..9a527bcd
--- /dev/null
+++ b/include/klee/util/ArrayExprHash.h
@@ -0,0 +1,135 @@
+//===-- ArrayExprHash.h --------------------------------------------*- C++ -*-===//
+//
+//                     The KLEE Symbolic Virtual Machine
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef __UTIL_ARRAYEXPRHASH_H__
+#define __UTIL_ARRAYEXPRHASH_H__
+
+#include "klee/Expr.h"
+#include "klee/TimerStatIncrementer.h"
+#include "SolverStats.h"
+
+#include <map>
+#include <tr1/unordered_map>
+
+namespace klee {
+  
+struct ArrayHashFn  {
+  unsigned operator()(const Array* array) const {
+    return(array ? array->hash() : 0);
+  }
+};
+    
+struct ArrayCmpFn {
+  bool operator()(const Array* array1, const Array* array2) const {
+    return(array1 == array2);
+  }
+};  
+  
+struct UpdateNodeHashFn  {
+  unsigned operator()(const UpdateNode* un) const {
+    return(un ? un->hash() : 0);
+  }
+};
+    
+struct UpdateNodeCmpFn {
+  bool operator()(const UpdateNode* un1, const UpdateNode* un2) const {
+    return(un1 == un2);
+  }
+};  
+
+template<class T>
+class ArrayExprHash {  
+public:
+  
+  ArrayExprHash() {};
+  // Note: Extend the class and overload the destructor if the objects of type T
+  // that are to be hashed need to be explicitly destroyed
+  // As an example, see class STPArrayExprHash
+  virtual ~ArrayExprHash() {};
+   
+  bool lookupArrayExpr(const Array* array, T& exp) const;
+  void hashArrayExpr(const Array* array, T& exp);  
+  
+  bool lookupUpdateNodeExpr(const UpdateNode* un, T& exp) const;
+  void hashUpdateNodeExpr(const UpdateNode* un, T& exp);  
+  
+protected:
+  typedef std::tr1::unordered_map<const Array*, T, ArrayHashFn, ArrayCmpFn> ArrayHash;
+  typedef typename ArrayHash::iterator ArrayHashIter;
+  typedef typename ArrayHash::const_iterator ArrayHashConstIter;
+  
+  typedef std::tr1::unordered_map<const UpdateNode*, T, UpdateNodeHashFn, UpdateNodeCmpFn> UpdateNodeHash;
+  typedef typename UpdateNodeHash::iterator UpdateNodeHashIter;
+  typedef typename UpdateNodeHash::const_iterator UpdateNodeHashConstIter;
+  
+  ArrayHash      _array_hash;
+  UpdateNodeHash _update_node_hash;  
+};
+
+
+template<class T>
+bool ArrayExprHash<T>::lookupArrayExpr(const Array* array, T& exp) const {
+  bool res = false;
+  
+#ifdef DEBUG
+  TimerStatIncrementer t(stats::arrayHashTime);
+#endif
+  
+  assert(array);  
+  ArrayHashConstIter it = _array_hash.find(array);
+  if (it != _array_hash.end()) {
+    exp = it->second;
+    res = true;
+  }  
+  return(res);  
+}
+
+template<class T>
+void ArrayExprHash<T>::hashArrayExpr(const Array* array, T& exp) {
+  
+#ifdef DEBUG  
+   TimerStatIncrementer t(stats::arrayHashTime);
+#endif
+   
+   assert(array);
+  _array_hash[array] = exp;
+}
+
+template<class T>
+bool ArrayExprHash<T>::lookupUpdateNodeExpr(const UpdateNode* un, T& exp) const
+{
+  bool res = false;
+  
+#ifdef DEBUG
+  TimerStatIncrementer t(stats::arrayHashTime);
+#endif
+  
+  assert(un);
+  UpdateNodeHashConstIter it = _update_node_hash.find(un);
+  if (it != _update_node_hash.end()) {
+    exp = it->second;
+    res = true;
+  }  
+  return(res);   
+}
+
+template<class T>
+void ArrayExprHash<T>::hashUpdateNodeExpr(const UpdateNode* un, T& exp) 
+{
+#ifdef DEBUG
+  TimerStatIncrementer t(stats::arrayHashTime);
+#endif
+  
+  assert(un);
+  _update_node_hash[un] = exp;
+}
+
+}
+
+#endif
\ No newline at end of file
-- 
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