added symbol struct and memory management

1 files changed, 19 insertions, 5 deletions

diff --git a/miniany/cc.c b/miniany/cc.c
index cf4f880..d77def0 100644
--- a/miniany/cc.c
+++ b/miniany/cc.c
@@ -278,25 +278,39 @@ void parseExpression( )
 	}
 }
 
-/*
 struct Symbol {
 	char *name;
+	struct Symbol *next;
 };
 
 struct Symbol *symbol;
-*/
 
-void newSymbol( char *s )
+struct Symbol *createSymbol( char *s )
 {
+	struct Symbol *sym;
 	
+	sym = (struct Symbol *)malloc( sizeof ( struct Symbol ) );
+	sym->name = strdup( s );
+	sym->next = NULL;
+
+	return sym;
+}
+
+void freeSymbol( struct Symbol *sym )
+{
+	free( sym->name );
+	free( (char *)sym );
 }
 
 void parseDeclaration( )
 {
+	struct Symbol *sym;
+	
 	expect( S_INT, "int" );	
 	expect( S_IDENT, "identifier" );
 	putstring( "Adding glob: " ); putstring( ident ); putnl( );
-	newSymbol( ident );
+	sym = createSymbol( ident );
+	freeSymbol( sym );
 	expect( S_SEMICOLON, ";" );
 }
 
@@ -325,7 +339,7 @@ int main( int argc, char **argv )
 	row = 1;
 	pushback = 0;
 	DEBUG_SCANNER = 1;
-	/* symbol = NULL; */
+	symbol = NULL;
 	ident = "12345678901234567890";
 
 	token = getToken( );