Z3 sources

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

lib/check_sat_result.h

@@ -0,0 +1,69 @@
+/*++
+Copyright (c) 2012 Microsoft Corporation
+
+Module Name:
+
+    check_sat_result.h
+
+Abstract:
+    Abstract interface for storing the result produced by 
+    a check_sat like command
+
+Author:
+
+    Leonardo (leonardo) 2012-01-23
+
+Notes:
+
+--*/
+#ifndef _CHECK_SAT_RESULT_H_
+#define _CHECK_SAT_RESULT_H_
+
+#include"model.h"
+#include"lbool.h"
+#include"statistics.h"
+
+class check_sat_result {
+protected:
+    unsigned    m_ref_count;
+    lbool       m_status; 
+public:
+    check_sat_result():m_ref_count(0), m_status(l_undef) {}
+    virtual ~check_sat_result() {}
+    void inc_ref() { m_ref_count++; }
+    void dec_ref() { SASSERT(m_ref_count > 0); m_ref_count--; if (m_ref_count == 0) dealloc(this); }
+    void set_status(lbool r) { m_status = r; }
+    lbool status() const { return m_status; }
+    virtual void collect_statistics(statistics & st) const = 0;
+    virtual void get_unsat_core(ptr_vector<expr> & r) = 0;
+    virtual void get_model(model_ref & m) = 0;
+    virtual proof * get_proof() = 0;
+    virtual std::string reason_unknown() const = 0;
+    virtual void get_labels(svector<symbol> & r) = 0;
+};
+
+struct simple_check_sat_result : public check_sat_result {
+    statistics      m_stats;
+    model_ref       m_model;
+    expr_ref_vector m_core;
+    proof_ref       m_proof;
+    std::string     m_unknown;
+
+    simple_check_sat_result(ast_manager & m):
+        m_core(m),
+        m_proof(m) {
+    }
+    virtual ~simple_check_sat_result() {}
+    virtual void collect_statistics(statistics & st) const { st.copy(m_stats); }
+    virtual void get_unsat_core(ptr_vector<expr> & r) { if (m_status == l_false) r.append(m_core.size(), m_core.c_ptr()); }
+    virtual void get_model(model_ref & m) { 
+        if (m_status != l_false) m = m_model; else m = 0; 
+    }
+    virtual proof * get_proof() { return m_status == l_false ? m_proof.get() : 0; }
+    virtual std::string reason_unknown() const { 
+        return m_unknown; 
+    }
+    virtual void get_labels(svector<symbol> & r) {}
+};
+
+#endif