1 files changed, 11 insertions, 0 deletions
diff --git a/system/lib/libc/musl/src/stdio/__uflow.c b/system/lib/libc/musl/src/stdio/__uflow.c
new file mode 100644
index 00000000..e28922c2
--- /dev/null
+++ b/system/lib/libc/musl/src/stdio/__uflow.c
@@ -0,0 +1,11 @@
+#include "stdio_impl.h"
+
+/* This function will never be called if there is already data
+ * buffered for reading. Thus we can get by with very few branches. */
+
+int __uflow(FILE *f)
+{
+	unsigned char c;
+	if ((f->rend || !__toread(f)) && f->read(f, &c, 1)==1) return c;
+	return EOF;
+}