binpac: Fix LGTM findings

tools/binpac/src/pac_attr.cc

@@ -17,6 +17,7 @@ void Attr::init()
 	{
 	expr_ = 0;
 	seqend_ = 0;
+	delete_expr_ = false;
 	}
 
 Attr::Attr(AttrType type)
@@ -40,6 +41,7 @@ Attr::Attr(AttrType type, ExprList *exprlist)
 	type_ = type;
 	init();
 	expr_ = new Expr(exprlist);
+	delete_expr_ = true;
 	}
 
 Attr::Attr(AttrType type, SeqEnd *seqend)
@@ -50,6 +52,12 @@ Attr::Attr(AttrType type, SeqEnd *seqend)
 	seqend_ = seqend;
 	}
 
+Attr::~Attr()
+	{
+	if ( delete_expr_ )
+		delete expr_;
+	}
+
 LetAttr::LetAttr(FieldList *letfields)
 	: Attr(ATTR_LET)
 	{

tools/binpac/src/pac_attr.h

@@ -32,6 +32,8 @@ public:
 	Attr(AttrType type, ExprList *exprlist);
 	Attr(AttrType type, SeqEnd *seqend);
 
+	virtual ~Attr();
+
 	AttrType type() const 		{ return type_; }
 	Expr *expr() const		{ return expr_; }
 	SeqEnd *seqend() const		{ return seqend_; }
@@ -47,6 +49,7 @@ protected:
 	AttrType type_;
 	Expr *expr_;
 	SeqEnd *seqend_;
+	bool delete_expr_;
 };
 
 class LetAttr : public Attr

tools/binpac/src/pac_case.cc

@@ -436,22 +436,21 @@ void CaseField::GenParseCode(Output* out_cc, Env* env,
 	
 	{
 	Env case_env(env, this);
-	Env *env = &case_env;
 
-	type_->GenPreParsing(out_cc, env);
-	type_->GenParseCode(out_cc, env, data, 0);
+	type_->GenPreParsing(out_cc, &case_env);
+	type_->GenParseCode(out_cc, &case_env, data, 0);
 	if ( size_var )
 		{
 		out_cc->println("%s = %s;",
-			env->LValue(size_var),
-			type_->DataSize(out_cc, env, data).c_str());
+			case_env.LValue(size_var),
+			type_->DataSize(out_cc, &case_env, data).c_str());
 		}
 	if ( type_->incremental_input() )
 		{
 		ASSERT(case_type()->parsing_complete_var());
 		out_cc->println("%s = %s;",
-			env->LValue(case_type()->parsing_complete_var()),
-			env->RValue(type_->parsing_complete_var()));
+			case_env.LValue(case_type()->parsing_complete_var()),
+			case_env.RValue(type_->parsing_complete_var()));
 		}
 	out_cc->println("}");
 	}

tools/binpac/src/pac_conn.cc

@@ -24,6 +24,7 @@ ConnDecl::~ConnDecl()
 	{
 	delete flows_[0];
 	delete flows_[1];
+	delete data_type_;
 	}
 
 void ConnDecl::AddBaseClass(vector<string> *base_classes) const

tools/binpac/src/pac_context.cc

@@ -66,6 +66,7 @@ AnalyzerContextDecl::AnalyzerContextDecl(
 AnalyzerContextDecl::~AnalyzerContextDecl()
 	{
 	delete context_name_id_;
+	delete param_type_;
 	delete_list(ContextFieldList, context_fields_);
 	}
 

tools/binpac/src/pac_cstr.cc

@@ -87,7 +87,7 @@ ConstString::ConstString(const string &s)
 		int len = strlen(text) + 1;
 		int i = 0;
 
-		char* s = new char[len];
+		char* new_s = new char[len];
 
 		// Skip leading quote.
 		for ( ++text; *text; ++text )
@@ -95,22 +95,22 @@ ConstString::ConstString(const string &s)
 			if ( *text == '\\' )
 				{
 				++text;	// skip '\'
-				s[i++] = expand_escape(text);
+				new_s[i++] = expand_escape(text);
 				--text;	// point to end of sequence
 				}
 			else
 				{
-				s[i++] = *text;
+				new_s[i++] = *text;
 				}
 			}
 		ASSERT(i < len);
 
 		// Get rid of trailing quote.
-		ASSERT(s[i-1] == '"');
-		s[i-1] = '\0';
+		ASSERT(new_s[i-1] == '"');
+		new_s[i-1] = '\0';
 
-		unescaped_ = s;
-		delete [] s;
+		unescaped_ = new_s;
+		delete [] new_s;
 		}
 	catch(EscapeException const &e)
 		{

tools/binpac/src/pac_dataptr.h

@@ -11,6 +11,7 @@ class DataPtr
 {
 public:
 	DataPtr(Env* env, const ID* arg_id, const int arg_off);
+	DataPtr(DataPtr const& x) { *this = x; }
 
 	DataPtr const &operator=(DataPtr const &x)
 		{

tools/binpac/src/pac_id.h

@@ -50,7 +50,7 @@ public:
 		}
 	~ID()
 		{
-		delete locname;
+		delete [] locname;
 		}
 
 	bool operator==(ID const &x) const { return name == x.Name(); }

tools/binpac/src/pac_let.cc

@@ -8,9 +8,6 @@ namespace {
 
 void GenLetEval(const ID *id, Expr *expr, string prefix, Output* out, Env* env)
 	{
-	if ( expr )
-		{
-		}
 	}
 
 } // private namespace

tools/binpac/src/pac_primitive.cc

@@ -19,9 +19,6 @@ string PPSet::ToCode(Env *env)
 string PPType::ToCode(Env *env)
 	{
 	Type *type = expr_->DataType(env);
-	if ( ! type )
-		{
-		}
 	return type->DataTypeStr();
 	}