diff --git a/c/input/peek_file_reader.c b/c/input/peek_file_reader.c
new file mode 100644
index 000000000..ed6ef6c7d
--- /dev/null
+++ b/c/input/peek_file_reader.c
@@ -0,0 +1,31 @@
+#include "lib/mlrutil.h"
+#include "peek_file_reader.h"
+
+// typedef struct _peek_file_reader_t {
+//     FILE* fp;
+//     int   peekbuflen;
+//     char* peekbuf;
+//     int   npeeked;
+// } peek_file_reader_t;
+
+int pfr_at_eof(peek_file_reader_t* pfr) {
+	return TRUE; // xxx stub
+}
+
+int pfr_next_is(peek_file_reader_t* pfr, char* string, int len) {
+	return FALSE; // xxx stub
+}
+
+char pfr_read_char(peek_file_reader_t* pfr) {
+	// xxx stub
+	return 'x';
+}
+
+void pfr_advance_past(peek_file_reader_t* pfr, char* string) {
+	// xxx stub
+}
+
+void pfr_close(peek_file_reader_t* pfr) {
+	fclose(pfr->fp);
+	pfr->fp = NULL;
+}
diff --git a/c/input/peek_file_reader.h b/c/input/peek_file_reader.h
new file mode 100644
index 000000000..b704d446d
--- /dev/null
+++ b/c/input/peek_file_reader.h
@@ -0,0 +1,20 @@
+#ifndef PEEK_FILE_READER_H
+#define PEEK_FILE_READER_H
+
+#include <stdio.h>
+
+typedef struct _peek_file_reader_t {
+	FILE* fp;
+	int   peekbuflen;
+	char* peekbuf;
+	int   npeeked;
+} peek_file_reader_t;
+
+// xxx needing contextual comments here.
+int  pfr_at_eof(peek_file_reader_t* pfr);
+int  pfr_next_is(peek_file_reader_t* pfr, char* string, int len);
+char pfr_read_char(peek_file_reader_t* pfr);
+void pfr_advance_past(peek_file_reader_t* pfr, char* string);
+void pfr_close(peek_file_reader_t* pfr);
+
+#endif // PEEK_FILE_READER_H