bool smt1_dect::string_to_expr_z3( const typet &type, const std::string &value, exprt &e) const { if(value.substr(0,2)=="bv") { std::string v=value.substr(2, value.find('[')-2); size_t p = value.find('[')+1; std::string w=value.substr(p, value.find(']')-p); std::string binary=integer2binary(string2integer(v,10), string2integer(w,10).to_ulong()); if(type.id()==ID_struct) { e=binary2struct(to_struct_type(type), binary); } else if(type.id()==ID_union) { e=binary2union(to_union_type(type), binary); } else { constant_exprt c(type); c.set_value(binary); e=c; } return true; } else if(value.substr(0,6)=="(const") // const arrays { std::string av = value.substr(7, value.length()-8); exprt ae; if(!string_to_expr_z3(type.subtype(), av, ae)) return false; array_of_exprt ao; ao.type() = typet("array"); ao.type().subtype()=ae.type(); ao.what() = ae; e = ao; return true; } else if(value.substr(0,6)=="(store") { size_t p1=value.rfind(' ')+1; size_t p2=value.rfind(' ', p1-2)+1; assert(p1!=std::string::npos && p2!=std::string::npos); std::string elem = value.substr(p1, value.size()-p1-1); std::string inx = value.substr(p2, p1-p2-1); std::string array = value.substr(7, p2-8); exprt old; if(!string_to_expr_z3(type, array, old)) return false; exprt where; if(!string_to_expr_z3(array_index_type(), inx, where)) return false; exprt new_val; if(!string_to_expr_z3(type.subtype(), elem, new_val)) return false; e = with_exprt(old, where, new_val); return true; } else if(value=="false") { e = false_exprt(); return true; } else if(value=="true") { e = true_exprt(); return true; } else if(value.substr(0,8)=="array_of") { // We assume that array_of has only concrete arguments... irep_idt id(value); array_of_mapt::const_iterator fit=array_of_map.begin(); while(fit!=array_of_map.end() && fit->second!=id) fit++; if(fit==array_of_map.end()) return false; e = fit->first; return true; } else if(type.id()==ID_rational) { constant_exprt result; result.type()=rational_typet(); if(value.substr(0,4)=="val!") result.set_value(value.substr(4)); else result.set_value(value); e = result; return true; } return false; }
void dplib_convt::convert_dplib_expr(const exprt &expr) { if(expr.id()==ID_symbol) { convert_identifier(expr.get_string(ID_identifier)); } else if(expr.id()==ID_nondet_symbol) { convert_identifier("nondet$"+expr.get_string(ID_identifier)); } else if(expr.id()==ID_typecast) { assert(expr.operands().size()==1); const exprt &op=expr.op0(); if(expr.type().id()==ID_bool) { if(op.type().id()==ID_signedbv || op.type().id()==ID_unsignedbv || op.type().id()==ID_pointer) { convert_dplib_expr(op); dplib_prop.out << "/="; convert_dplib_expr(gen_zero(op.type())); } else { throw "TODO typecast1 "+op.type().id_string()+" -> bool"; } } else if(expr.type().id()==ID_signedbv || expr.type().id()==ID_unsignedbv) { unsigned to_width=unsafe_string2unsigned(id2string(expr.type().get(ID_width))); if(op.type().id()==ID_signedbv) { unsigned from_width=unsafe_string2unsigned(id2string(op.type().get(ID_width))); if(from_width==to_width) convert_dplib_expr(op); else if(from_width<to_width) { dplib_prop.out << "SX("; convert_dplib_expr(op); dplib_prop.out << ", " << to_width << ")"; } else { dplib_prop.out << "("; convert_dplib_expr(op); dplib_prop.out << ")[" << (to_width-1) << ":0]"; } } else if(op.type().id()==ID_unsignedbv) { unsigned from_width=unsafe_string2unsigned(id2string(op.type().get(ID_width))); if(from_width==to_width) convert_dplib_expr(op); else if(from_width<to_width) { dplib_prop.out << "(0bin"; for(unsigned i=from_width; i<to_width; i++) dplib_prop.out << "0"; dplib_prop.out << " @ "; dplib_prop.out << "("; convert_dplib_expr(op); dplib_prop.out << "))"; } else { dplib_prop.out << "("; convert_dplib_expr(op); dplib_prop.out << ")[" << (to_width-1) << ":0]"; } } else if(op.type().id()==ID_bool) { if(to_width>1) { dplib_prop.out << "(0bin"; for(unsigned i=1; i<to_width; i++) dplib_prop.out << "0"; dplib_prop.out << " @ "; dplib_prop.out << "IF "; convert_dplib_expr(op); dplib_prop.out << " THEN 0bin1 ELSE 0bin0 ENDIF)"; } else { dplib_prop.out << "IF "; convert_dplib_expr(op); dplib_prop.out << " THEN 0bin1 ELSE 0bin0 ENDIF"; } } else { throw "TODO typecast2 "+op.type().id_string()+ " -> "+expr.type().id_string(); } } else if(expr.type().id()==ID_pointer) { if(op.type().id()==ID_pointer) { convert_dplib_expr(op); } else throw "TODO typecast3 "+op.type().id_string()+" -> pointer"; } else throw "TODO typecast4 ? -> "+expr.type().id_string(); } else if(expr.id()==ID_struct) { dplib_prop.out << "(# "; const struct_typet &struct_type=to_struct_type(expr.type()); const struct_typet::componentst &components= struct_type.components(); assert(components.size()==expr.operands().size()); unsigned i=0; for(struct_typet::componentst::const_iterator it=components.begin(); it!=components.end(); it++, i++) { if(i!=0) dplib_prop.out << ", "; dplib_prop.out << it->get(ID_name); dplib_prop.out << ":="; convert_dplib_expr(expr.operands()[i]); } dplib_prop.out << " #)"; } else if(expr.id()==ID_constant) { if(expr.type().id()==ID_unsignedbv || expr.type().id()==ID_signedbv || expr.type().id()==ID_bv) { dplib_prop.out << "0bin" << expr.get(ID_value); } else if(expr.type().id()==ID_pointer) { const irep_idt &value=expr.get(ID_value); if(value=="NULL") { dplib_prop.out << "(# object:=" << pointer_logic.get_null_object() << ", offset:=" << bin_zero(config.ansi_c.pointer_width) << " #)"; } else throw "unknown pointer constant: "+id2string(value); } else if(expr.type().id()==ID_bool) { if(expr.is_true()) dplib_prop.out << "TRUE"; else if(expr.is_false()) dplib_prop.out << "FALSE"; else throw "unknown boolean constant"; } else if(expr.type().id()==ID_array) { dplib_prop.out << "ARRAY (i: " << array_index_type() << "):"; assert(!expr.operands().empty()); unsigned i=0; forall_operands(it, expr) { if(i==0) dplib_prop.out << "\n IF "; else dplib_prop.out << "\n ELSIF "; dplib_prop.out << "i=" << array_index(i) << " THEN "; convert_array_value(*it); i++; } dplib_prop.out << "\n ELSE "; convert_dplib_expr(expr.op0()); dplib_prop.out << "\n ENDIF"; } else if(expr.type().id()==ID_integer ||