From fc00c656c96528112d05cf0edf8631bd5eaea446 Mon Sep 17 00:00:00 2001
From: Kacper <kacper@mail.openlinux.dev>
Date: Sun, 7 Dec 2025 20:10:31 +0100
Subject: Add build system scaffolding and libc headers

---
 lib/libc/stdlib/btowc.c | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)
 create mode 100644 lib/libc/stdlib/btowc.c

(limited to 'lib/libc/stdlib/btowc.c')

diff --git a/lib/libc/stdlib/btowc.c b/lib/libc/stdlib/btowc.c
new file mode 100644
index 00000000..f16865b7
--- /dev/null
+++ b/lib/libc/stdlib/btowc.c
@@ -0,0 +1,18 @@
+#include <wchar.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+#define CODEUNIT(c) (0xdfff & (signed char)(c))
+
+wint_t btowc(int c)
+{
+	if ((unsigned char)c < 128U) {
+		return c;
+	}
+
+	if (MB_CUR_MAX == 1 && c != EOF) {
+		return CODEUNIT(c);
+	}
+
+	return WEOF;
+}
-- 
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