1 files changed, 13 insertions, 0 deletions
diff --git a/masm/lex.h b/masm/lex.h
index f1c482a..e08d0a3 100644
--- a/masm/lex.h
+++ b/masm/lex.h
@@ -14,6 +14,13 @@ struct lexer {
 	int y;
 };
 
+struct lexer_state {
+	long offset;
+	int peek;
+	int x;
+	int y;
+};
+
 enum token_type {
 	TOK_IDENT,
 	TOK_REG,
@@ -52,4 +59,10 @@ int lexer_next(struct lexer *lexer, struct token *token);
 /* token type to string */
 char *token_str(enum token_type);
 
+/* save the state of a lexer */
+void lexer_save(struct lexer *lexer, struct lexer_state *state);
+
+/* load a different state into a lexer */
+void lexer_load(struct lexer *lexer, const struct lexer_state *state);
+
 #endif /* __LEX_H__ */