Remove EOF char

As I heard today, the compressor should do binary files.

NB! This EOF solution works perfectly fine, as 0xff is interpreted as ' '
(not space). Normal text files never have this character in them.

print_helper.c

@@ -31,9 +31,6 @@ void print_char(unsigned char c)
 	case 0:
 		printf("0\n");
 		break;
-	case EOF_CHAR:
-		printf("EOF\n");
-		break;
 	case '\n':
 		printf("\\n\n");
 		break;

tree.c

@@ -35,9 +35,8 @@ struct tree *create_tree(FILE *file)
 		if (c == EOF || c > MY_BUF-1)
 			break;
 
-		/* While theoretically these files *can* be supported, Huffman is meant
-		 * for text encoding/decoding, so we don't give a sh. */
-		if (c > MY_BUF-1 || c == EOF_CHAR) {
+		/* Should never reach this but better safe than sorry. */
+		if (c > MY_BUF-1) {
 			fprintf(stderr, "File not supported\n");
 			return NULL;
 		}
@@ -58,9 +57,6 @@ struct tree *create_tree(FILE *file)
 		}
 	}
 
-	/* Insert our special EOF char. */
-	forest[ntrees++] = insert_simple_tree(EOF_CHAR, 1);
-
 	/* Sort ascending */
 	for (int i = 0; i < ntrees; i++) {
 		for (int j = i+1; j < ntrees; j++) {
@@ -140,9 +136,6 @@ int encode_tree(struct BIT_BUFFER *bitbuf, struct tree *parent, char *buf,
 		write_entry(bitbuf, parent, buf[i]);
 	}
 
-	/* Insert our special EOF char. */
-	write_entry(bitbuf, parent, EOF_CHAR);
-
 	return 0;
 }
 
@@ -153,20 +146,12 @@ static int read_entries(struct BIT_BUFFER *bitbuf, FILE *out,
 	struct tree *leaf = parent;
 	while ((bit = bb_read(bitbuf, 1)) != NULL) {
 		if (*bit == 1) {
-			if (leaf->right->ch == EOF_CHAR) {
-				free(bit);
-				break;
-			}
 			fwrite(&leaf->right->ch, 1, 1, out);
 			leaf->right->freq++;
 			leaf = parent; /* Reset */
 		} else {
 			leaf = leaf->left;
 			if (!leaf->left) {
-				if (leaf->ch == EOF_CHAR) {
-					free(bit);
-					break;
-				}
 				fwrite(&leaf->ch, 1, 1, out);
 				leaf->freq++;
 				leaf = parent; /* Reset */

tree.h

@@ -4,9 +4,6 @@
 
 #include "bit-buffer.h"
 
-/* Our special EOF character. */
-#define EOF_CHAR 0xff
-
 struct tree {
 	struct tree *left;
 	struct tree *right;