Merge pull request #31 from UB-CSE443/Sprint2-Partho_Symbol_Tabke-FE-t#NoTask

updated get entry function to get string pointers instead of creating…

src/runner.c

@@ -75,7 +75,7 @@ fprintf(tok_flag, "%d %d %3d \"%s\"\n", line_number, column_number,tok, yytext);
 }
 int run(FILE *alpha) {
         int token;
-        cur = CreateScope(NULL, 1, 1);
+        top = cur = CreateScope(NULL, 1, 1);
 
         // If file is not found
         if (alpha == NULL) {

src/symbol_table.c

@@ -6,7 +6,8 @@
 #include <stdbool.h>
 #include <stdio.h>
 #include <stdlib.h>
-
+char * typey = "type";
+char * funy = "function";
 SymbolTable* CreateScope(SymbolTable* ParentScope, int Line, int Column) {
         SymbolTable* table = (SymbolTable*)malloc(sizeof(SymbolTable));
         table->Line_Number = Line;
@@ -33,9 +34,20 @@ SymbolTable* CreateScope(SymbolTable* ParentScope, int Line, int Column) {
         return table;
 }
 
+//create entry just for things below top level scope
 TableNode* CreateEntry(SymbolTable* table, char* typeOf, char* id) {
+
+if(table ==NULL || table->Parent_Scope == NULL){
+        printf("Null reference to table given for create entry or given top level scope which is invalid\n");
+        return NULL;
+}
+TableNode* topDef = (table_lookup(getAncestor(table),typeOf));
+if(topDef == NULL){
+	printf("This type is not defined at the top level\n");
+	return NULL;
+}
   TableNode* newEntry = (TableNode*)malloc(sizeof(TableNode));
-        newEntry->theType = typeOf;
+  newEntry->theType = topDef->theName;
   newEntry->theName = id;
   if (table->entries == NULL) {
     table->entries = newEntry;
@@ -47,6 +59,41 @@ TableNode* CreateEntry(SymbolTable* table, char* typeOf, char* id) {
     return newEntry;
   }
 }
+
+//we use false for type defs and true for functions for parameter of typeOf
+TableNode* Define(SymbolTable* table, bool typeOf, char* id) {
+if(table ==NULL || table->Parent_Scope != NULL){
+	printf("No valid table given for header defs\n");
+	return NULL;
+}
+
+
+  TableNode* newEntry = (TableNode*)malloc(sizeof(TableNode));
+
+//possible issues with referencing text instead of heap
+if(typeOf == 0){
+	newEntry->theType = typey;
+}
+if (typeOf == 1){
+	newEntry->theType = funy;
+}
+if(table_lookup(table,id) != NULL){
+	printf("already defined at the top level, can't define duplicate names\n");
+	return NULL;
+}
+  newEntry->theName = id;
+  if (table->entries == NULL) {
+    table->entries = newEntry;
+    return newEntry;
+  } else {
+    TableNode* oldEntry = table->entries;
+    table->entries = newEntry;
+    newEntry->next = oldEntry;
+    return newEntry;
+  }
+
+}
+
 TableNode* table_lookup(SymbolTable* table, char* x) {
         TableNode* entrie = table->entries;
         for (; entrie != NULL; entrie = entrie->next) {

tests/sprint2/test/sp2_simple.alpha

@@ -1,4 +1,5 @@
-#include "library.alpha"
+
 entry(arg) := {
+	[int : x]
         return 0;
 }