From d067119a905dc1ef5a1c276ed3650147bb6b9038 Mon Sep 17 00:00:00 2001
From: Tyler Murphy <tylerm@tylerm.dev>
Date: Thu, 13 Apr 2023 22:24:28 -0400
Subject: [PATCH] funny valgrind

---
 src/interpreter.c |  1 -
 src/program.c     | 11 ++++-------
 src/program.h     |  3 +--
 3 files changed, 5 insertions(+), 10 deletions(-)

diff --git a/src/interpreter.c b/src/interpreter.c
index 7255a4c..a6ad544 100644
--- a/src/interpreter.c
+++ b/src/interpreter.c
@@ -136,7 +136,6 @@ next:
             break;
         case LeaveTape:
         case Eof:
-        case Invalid:
             return;
     }
 
diff --git a/src/program.c b/src/program.c
index aa113b6..dcec0f7 100644
--- a/src/program.c
+++ b/src/program.c
@@ -64,7 +64,8 @@ retest:
         case EOF:
             return Eof;
         default:
-            return Invalid;
+            c = next_char();
+            goto retest;
     }
 }
 
@@ -80,16 +81,12 @@ void program_init(char* file_path, Program* program) {
 
     program->data = malloc(capacity * sizeof(Symbol));
     program->len = 0;
+    program->index = 0;
 
     Symbol s;
     while(true) {
         s = next_symbol();
         
-        if (s == Invalid) {
-            printf("error: invalid symbol at character %d\n", count);
-            exit(EXIT_FAILURE);
-        }
-
         if (program->len == capacity) {
             capacity *= 2;
             program->data = realloc(program->data, capacity * sizeof(Symbol));
@@ -118,7 +115,7 @@ void program_next(Program* program, Symbol* symbol) {
 }
 
 void program_last(Program* program, Symbol* symbol) {
-    if (program->index == 0) {
+    if (program->index < 1) {
         *symbol = Eof;
         return;
     }
diff --git a/src/program.h b/src/program.h
index 7b40712..23f4d74 100644
--- a/src/program.h
+++ b/src/program.h
@@ -19,8 +19,7 @@ typedef enum {
     PutString,
     GetString,
     Clear,
-    Eof,
-    Invalid
+    Eof
 } Symbol;
 
 typedef struct {