1 files changed, 34 insertions, 0 deletions
diff --git a/lex.h b/lex.h
new file mode 100644
index 0000000..6e836ac
--- /dev/null
+++ b/lex.h
@@ -0,0 +1,34 @@
+#ifndef LEX_H
+#define LEX_H
+
+#include <stddef.h>
+#include <stdio.h>
+
+enum tktype {UNDEF, ID, LIT, NUM, ANY};
+
+struct loc
+{
+    const char *f;
+    int line, col;
+};
+
+struct tk
+{
+    enum tktype type;
+    struct loc loc;
+    char *s;
+};
+
+struct lex
+{
+    struct loc loc;
+    struct tk *tokens, tk;
+    size_t ntok, len;
+    int comment;
+};
+
+int lex(struct lex *lex, FILE *f);
+int lex_eof(const struct lex *lex, const struct tk *tk);
+void lex_free(struct lex *lex);
+
+#endif