Fix buffer overflow error (#4)

Author: 0xadeeb

Diff for: aa.c

@@ -6,7 +6,7 @@ struct ASTNode *TreeCreate(struct Typetable *type, int nodetype, char *name, uni
 	temp->nodetype = nodetype;
 	if (name != NULL)
 	{
-		temp->name = (char *)malloc(sizeof(name));
+		temp->name = (char *)malloc(strlen(name) * sizeof(char));
 		strcpy(temp->name, name);
 	}
 	else
@@ -26,4 +26,4 @@ struct ASTNode *TreeCreate(struct Typetable *type, int nodetype, char *name, uni
 	temp->ptr2 = ptr2;
 	temp->ptr3 = ptr3;
 	return temp;
-}
+}

Diff for: abstree.l

@@ -66,7 +66,7 @@
 "alloc" 	{return ALLOC;}
 "free" 		{return FREE;}
 [a-zA-Z][a-zA-Z0-9]*	{
-			variable = malloc(sizeof(yytext));
+			variable = malloc(yyleng * sizeof(char));
 			strcpy(variable, yytext);
 			temp = TLookup("integer");  // default type for any word (variable or string) is int
 			yylval.nptr = TreeCreate(temp, NODE_ID, variable, &yytext, NULL, NULL, NULL, NULL); 

Diff for: symboltable.c

@@ -23,7 +23,7 @@ void GInstall(char *name, struct Typetable *type, int size, struct Paramstruct *
     }
 
     temp = (struct Gsymbol *)malloc(sizeof(struct Gsymbol));
-    temp->name = (char *)malloc(sizeof(name));
+    temp->name = (char *)malloc(strlen(name) * sizeof(char));
     strcpy(temp->name, name);
     temp->type = type;
     temp->size = size;
@@ -67,7 +67,7 @@ void LInstall(char *name, struct Typetable *type)
 {
     struct Lsymbol *temp;
     temp = (struct Lsymbol *)malloc(sizeof(struct Lsymbol));
-    temp->name = (char *)malloc(sizeof(name));
+    temp->name = (char *)malloc(strlen(name) * sizeof(char));
     strcpy(temp->name, name);
     temp->type = type;
     temp->next = NULL;
@@ -100,7 +100,7 @@ void PInstall(char *name, struct Typetable *type)
 {
     struct Paramstruct *temp;
     temp = (struct Paramstruct *)malloc(sizeof(struct Paramstruct));
-    temp->name = (char *)malloc(sizeof(name));
+    temp->name = (char *)malloc(strlen(name) * sizeof(char));
     strcpy(temp->name, name);
     temp->type = type;
     temp->next = NULL;
@@ -135,7 +135,7 @@ void TInstall(char *name, int size, struct Fieldlist *fields)
     int counter = 0;
 
     temp = (struct Typetable *)malloc(sizeof(struct Typetable));
-    temp->name = (char *)malloc(sizeof(name));
+    temp->name = (char *)malloc(strlen(name) * sizeof(char));
     strcpy(temp->name, name);
     temp->next = NULL;
 
@@ -183,7 +183,7 @@ void FInstall(struct Typetable *type, char *name)
     struct Fieldlist *temp;
     struct Typetable *temp1;
     temp = (struct Fieldlist *)malloc(sizeof(struct Fieldlist));
-    temp->name = (char *)malloc(sizeof(name));
+    temp->name = (char *)malloc(strlen(name) * sizeof(char));
     strcpy(temp->name, name);
     temp->type = type;
     temp->next = NULL;
@@ -210,4 +210,4 @@ void printSymbolTable()
         printf("%s----%s-----%d\n", temp->name, temp->type->name, temp->binding);
         temp = temp->next;
     }
-}
+}