fixed leaks triggered by sql_tests.cpp

src/sql/CreateStatement.h

@@ -34,8 +34,8 @@ namespace hsql {
 
     CreateType type;
     bool ifNotExists; // default: false
-    const char* filePath; // default: NULL
-    const char* tableName; // default: NULL
+    char* filePath; // default: NULL
+    char* tableName; // default: NULL
     std::vector<ColumnDefinition*>* columns; // default: NULL
   };
 

src/sql/DropStatement.h

@@ -20,7 +20,7 @@ namespace hsql {
     virtual ~DropStatement();
 
     EntityType type;
-    const char* name;
+    char* name;
   };
 
 } // namespace hsql

src/sql/ExecuteStatement.h

@@ -12,7 +12,7 @@ namespace hsql {
     ExecuteStatement();
     virtual ~ExecuteStatement();
 
-    const char* name;
+    char* name;
     std::vector<Expr*>* parameters;
   };
 

src/sql/Expr.cpp

@@ -124,7 +124,7 @@ namespace hsql {
 
   char* substr(const char* source, int from, int to) {
     int len = to - from;
-    char* copy = new char[len + 1];
+    char* copy = (char*) malloc(len + 1);;
     strncpy(copy, source + from, len);
     copy[len] = '\0';
     return copy;

src/sql/InsertStatement.h

@@ -19,7 +19,7 @@ namespace hsql {
     virtual ~InsertStatement();
 
     InsertType type;
-    const char* tableName;
+    char* tableName;
     std::vector<char*>* columns;
     std::vector<Expr*>* values;
     SelectStatement* select;

src/sql/PrepareStatement.h

@@ -23,8 +23,12 @@ namespace hsql {
      */
     void setPlaceholders(std::vector<void*> ph);
 
-    const char* name;
+    char* name;
     SQLParserResult* query;
+
+    // The expressions are not owned by this statement.
+    // Rather they are owned by the query and destroyed, when
+    // the query is destroyed.
     std::vector<Expr*> placeholders;
   };
 

src/sql/statements.cpp

@@ -19,7 +19,7 @@ namespace hsql {
     type(type) {};
 
   ColumnDefinition::~ColumnDefinition() {
-    delete name;
+    free(name);
   }
 
   // CreateStatemnet
@@ -32,9 +32,15 @@ namespace hsql {
     columns(NULL) {};
 
   CreateStatement::~CreateStatement() {
-    delete columns;
-    delete filePath;
-    delete tableName;
+    free(filePath);
+    free(tableName);
+
+    if (columns != NULL) {
+      for (ColumnDefinition* def : *columns) {
+        delete def;
+      }
+      delete columns;
+    }
   }
 
   // DeleteStatement
@@ -44,7 +50,7 @@ namespace hsql {
     expr(NULL) {};
 
   DeleteStatement::~DeleteStatement() {
-    delete tableName;
+    free(tableName);
     delete expr;
   }
 
@@ -55,7 +61,7 @@ namespace hsql {
     name(NULL) {}
 
   DropStatement::~DropStatement() {
-    delete name;
+    free(name);
   }
 
   // ExecuteStatement
@@ -65,8 +71,14 @@ namespace hsql {
     parameters(NULL) {}
 
   ExecuteStatement::~ExecuteStatement() {
-    delete name;
-    delete parameters;
+    free(name);
+
+    if (parameters != NULL) {
+      for (Expr* param : *parameters) {
+        delete param;
+      }
+      delete parameters;
+    }
   }
 
   // ImportStatement
@@ -91,10 +103,22 @@ namespace hsql {
     select(NULL) {}
 
   InsertStatement::~InsertStatement() {
-    delete tableName;
-    delete columns;
-    delete values;
+    free(tableName);
     delete select;
+
+    if (columns != NULL) {
+      for (char* column : *columns) {
+        free(column);
+      }
+      delete columns;
+    }
+
+    if (values != NULL) {
+      for (Expr* expr : *values) {
+        delete expr;
+      }
+      delete values;
+    }
   }
 
   // PrepareStatement
@@ -105,7 +129,7 @@ namespace hsql {
 
   PrepareStatement::~PrepareStatement() {
     delete query;
-    delete name;
+    free(name);
   }
 
   void PrepareStatement::setPlaceholders(std::vector<void*> ph) {
@@ -114,7 +138,7 @@ namespace hsql {
         placeholders.push_back((Expr*) e);
     }
     // Sort by col-id
-    std::sort(placeholders.begin(), placeholders.end(), [](Expr * i, Expr * j) -> bool { return (i->ival < j->ival); });
+    std::sort(placeholders.begin(), placeholders.end(), [](Expr* i, Expr* j) -> bool { return (i->ival < j->ival); });
 
     // Set the placeholder id on the Expr. This replaces the previously stored column id
     for (uintmax_t i = 0; i < placeholders.size(); ++i) placeholders[i]->ival = i;
@@ -189,8 +213,16 @@ namespace hsql {
 
   UpdateStatement::~UpdateStatement() {
     delete table;
-    delete updates;
     delete where;
+
+    if (updates != NULL) {
+      for (UpdateClause* update : *updates) {
+        free(update->column);
+        delete update->value;
+        delete update;
+      }
+      delete updates;
+    }
   }
 
   // TableRef

test/sql_tests.cpp

@@ -22,6 +22,8 @@ TEST(DeleteStatementTest) {
 	ASSERT(stmt->expr->isType(kExprOperator));
 	ASSERT_STREQ(stmt->expr->expr->name, "grade");
 	ASSERT_EQ(stmt->expr->expr2->fval, 2.0);
+
+	delete result;
 }
 
 TEST(CreateStatementTest) {
@@ -43,6 +45,8 @@ TEST(CreateStatementTest) {
 	ASSERT_EQ(stmt->columns->at(1)->type, ColumnDefinition::INT);
 	ASSERT_EQ(stmt->columns->at(2)->type, ColumnDefinition::INT);
 	ASSERT_EQ(stmt->columns->at(3)->type, ColumnDefinition::DOUBLE);
+
+	delete result;
 }
 
 
@@ -69,25 +73,40 @@ TEST(UpdateStatementTest) {
 	ASSERT(stmt->where->isType(kExprOperator));
 	ASSERT(stmt->where->isSimpleOp('='));
 	ASSERT_STREQ(stmt->where->expr->name, "name");
-	ASSERT_STREQ(stmt->where->expr2->name, "Max Mustermann");
+	ASSERT_STREQ(stmt->where->expr2->name, "Max Mustermann");\
 
+	delete result;
 }
 
 
 TEST(InsertStatementTest) {
-	TEST_PARSE_SINGLE_SQL("INSERT INTO students VALUES ('Max Mustermann', 12345, 'Musterhausen', 2.0)", kStmtInsert, InsertStatement, stmt);
+	TEST_PARSE_SINGLE_SQL(
+		"INSERT INTO students VALUES ('Max Mustermann', 12345, 'Musterhausen', 2.0)",
+		kStmtInsert,
+		InsertStatement,
+		result,
+		stmt);
 
 	ASSERT_EQ(stmt->values->size(), 4);
 	// TODO
+
+	delete result;
 }
 
 
 TEST(DropTableStatementTest) {
-	TEST_PARSE_SINGLE_SQL("DROP TABLE students", kStmtDrop, DropStatement, stmt);
+	TEST_PARSE_SINGLE_SQL(
+		"DROP TABLE students",
+		kStmtDrop,
+		DropStatement,
+		result,
+		stmt);
 
 	ASSERT_EQ(stmt->type, DropStatement::kTable);
 	ASSERT_NOTNULL(stmt->name);
 	ASSERT_STREQ(stmt->name, "students");
+
+	delete result;
 }
 
 
@@ -134,12 +153,16 @@ TEST(PrepareStatementTest) {
 	// Deallocate Statement
 	ASSERT_EQ(drop->type, DropStatement::kPreparedStatement);
 	ASSERT_STREQ(drop->name, "stmt");
+
+	delete result;
 }
 
 
 TEST(ExecuteStatementTest) {
-	TEST_PARSE_SINGLE_SQL("EXECUTE test(1, 2);", kStmtExecute, ExecuteStatement, stmt);
+	TEST_PARSE_SINGLE_SQL("EXECUTE test(1, 2);", kStmtExecute, ExecuteStatement, result, stmt);
 
 	ASSERT_STREQ(stmt->name, "test");
 	ASSERT_EQ(stmt->parameters->size(), 2);
+
+	delete result;
 }