2 files changed, 44 insertions, 0 deletions
diff --git a/sem_check.c b/sem_check.c
new file mode 100644
index 0000000..637d044
--- /dev/null
+++ b/sem_check.c
@@ -0,0 +1,36 @@
+#include <assert.h>
+#include <stdio.h>
+
+#include "node.h"
+#include "scope.h"
+#include "tree.h"
+#include "y.tab.h"
+#include "pc.h"
+#include "sem_check.h"
+
+void check_id(s, n)
+scope *s;
+char *n;
+{
+	char buf[100];
+
+	if (scope_search(s, n)) {
+		snprintf(buf, 100, "\"%s\" already defined in scope...\n", n);
+		yyerror(buf);
+	}
+}
+
+node* check_exists(s, n)
+scope *s;
+char *n;
+{
+	node *tmp;
+	char buf[100];
+
+	if(!(tmp = scope_search(s,n))) {
+		snprintf(buf, 100, "Cannot find \"%s\"\n", n);
+		yyerror(buf);
+	}
+
+	return tmp;
+}
diff --git a/sem_check.h b/sem_check.h
new file mode 100644
index 0000000..eef9e96
--- /dev/null
+++ b/sem_check.h
@@ -0,0 +1,8 @@
+#ifndef SEMCHECK_H
+#define SEMCHECK_H
+
+void check_id(scope*, char*);
+
+node* check_exists(scope*, char*);
+
+#endif