1 files changed, 33 insertions, 0 deletions
diff --git a/input.c b/input.c
new file mode 100644
index 0000000..dc745f1
--- /dev/null
+++ b/input.c
@@ -0,0 +1,33 @@
+/*
+ * input.c: read the source form
+ */
+
+#include <stdio.h>
+#include <assert.h>
+#include "buttress.h"
+
+static void unget(input *in, char c) {
+    assert(in->npushback < INPUT_PUSHBACK_MAX);
+    in->pushback[in->npushback++] = c;
+}
+
+/*
+ * Can return EOF
+ */
+static int get(input *in) {
+    if (in->npushback)
+	return (unsigned char)in->pushback[--in->npushback];
+    else if (in->currfp) {
+	int c = getc(in->currfp);
+	if (c == EOF) {
+	    fclose(in->currfp);
+	    in->currfp = NULL;
+	    in->currindex++;
+	}
+	return c;
+    }
+}
+
+paragraph *read_input(input *in) {
+    /* FIXME: do some reading */
+}