From 12e09f9f85ac48ff891adf92f3b2c9a5fea27273 Mon Sep 17 00:00:00 2001
From: Nicholas Noll <nbnoll@eml.cc>
Date: Sat, 4 Dec 2021 14:10:21 -0800
Subject: Chore(REMOVE): finished deprecation of old io functions.

The old methods were simple wrappers of C standard library functions.
We've moved (painfully) over to a new interface that allows for files to
live on the stack. All users of the functionality are ported over.
---
 src/base/io/ungetc.c | 13 +++++++++++++
 1 file changed, 13 insertions(+)
 create mode 100644 src/base/io/ungetc.c

(limited to 'src/base/io/ungetc.c')

diff --git a/src/base/io/ungetc.c b/src/base/io/ungetc.c
new file mode 100644
index 0000000..201ffd6
--- /dev/null
+++ b/src/base/io/ungetc.c
@@ -0,0 +1,13 @@
+#include "internal.h"
+
+int
+io·ungetc(io·Header *io)
+{
+    if(io->state == io·BufEnd)
+        io->state = io·BufRdr;
+    if(io->state != io·BufRdr)
+        return io·BufEof;
+
+    io->ilen--;
+    return 0;
+}
-- 
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