1 files changed, 25 insertions, 0 deletions
diff --git a/src/io.h b/src/io.h
new file mode 100644
index 0000000..8a96b59
--- /dev/null
+++ b/src/io.h
@@ -0,0 +1,25 @@
+#ifndef DUCC_IO_H
+#define DUCC_IO_H
+
+#include "std.h"
+
+struct SourceLocation {
+    const char* filename;
+    int line;
+};
+typedef struct SourceLocation SourceLocation;
+
+struct InFile {
+    const char* buf;
+    int pos;
+    SourceLocation loc;
+};
+typedef struct InFile InFile;
+
+InFile* infile_open(const char* filename);
+BOOL infile_eof(InFile* f);
+char infile_peek_char(InFile* f);
+char infile_next_char(InFile* f);
+BOOL infile_consume_if(InFile* f, char expected);
+
+#endif