Z3 sources

Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>

lib/numeral_buffer.h

@@ -0,0 +1,91 @@
+/*++
+Copyright (c) 2011 Microsoft Corporation
+
+Module Name:
+
+    numeral_buffer.h
+
+Abstract:
+
+    Basic buffer for managing big nums.
+
+Author:
+
+    Leonardo de Moura (leonardo) 2011-06-18.
+
+Revision History:
+
+--*/
+#ifndef _NUMERAL_BUFFER_H_
+#define _NUMERAL_BUFFER_H_
+
+#include"vector.h"
+
+template<typename Numeral, typename NumeralManager>
+class numeral_buffer {
+    NumeralManager &  m_manager;
+    svector<Numeral>  m_buffer;
+public:
+    typedef Numeral numeral;
+    typedef Numeral data;
+    typedef NumeralManager manager;
+
+    numeral_buffer(NumeralManager & m):m_manager(m) {}
+
+    ~numeral_buffer() {
+        reset();
+    }
+    
+    NumeralManager & m() const { return m_manager; }
+
+    unsigned size() const { return m_buffer.size(); }
+    
+    bool empty() const { return m_buffer.empty(); }
+
+    void push_back(Numeral const & num) {
+        m_buffer.push_back(Numeral());
+        m().set(m_buffer.back(), num);
+    }
+    
+    void pop_back() {
+        m().del(m_buffer.back());
+        m_buffer.pop_back();
+    }
+
+    Numeral & back() {
+        return m_buffer.back();
+    }
+
+    Numeral const & back() const {
+        return m_buffer.back();
+    }
+    
+    Numeral const & operator[](unsigned idx) const {
+        return m_buffer[idx];
+    }
+
+    Numeral & operator[](unsigned idx) {
+        return m_buffer[idx];
+    }
+
+    void reset() {
+        typename vector<Numeral>::iterator it  = m_buffer.begin();
+        typename vector<Numeral>::iterator end = m_buffer.end();
+        for (; it != end; ++it)
+            m().del(*it);
+        m_buffer.reset();
+    }
+
+    Numeral * c_ptr() { return m_buffer.c_ptr(); }
+
+    void reserve(unsigned sz) {
+        m_buffer.reserve(sz);
+    }
+
+    void swap(svector<Numeral> & other) {
+        m_buffer.swap(other);
+    }
+
+};
+
+#endif