1 files changed, 30 insertions, 0 deletions
diff --git a/driver.c b/driver.c
new file mode 100644
index 0000000..d89c412
--- /dev/null
+++ b/driver.c
@@ -0,0 +1,30 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include "ast.h"
+
+extern FILE *yyin;
+extern int yyparse(void);
+extern ASTNode *ast_root;
+
+int main(int argc, char **argv) {
+  if (argc > 1) {
+    yyin = fopen(argv[1], "r");
+    if (!yyin) {
+      perror(argv[1]);
+      return EXIT_FAILURE;
+    }
+  } else {
+    yyin = stdin;
+  }
+  
+  if (yyparse() != 0) {
+    fprintf(stderr, "Parsing failed.\n");
+    return EXIT_FAILURE;
+  }
+  
+  exec_stmt(ast_root);
+  env_print();
+  free_ast(ast_root);
+  
+  return EXIT_SUCCESS;
+}