zte's code,first commit
Change-Id: I9a04da59e459a9bc0d67f101f700d9d7dc8d681b
diff --git a/ap/build/uClibc/libc/stdio/ungetwc.c b/ap/build/uClibc/libc/stdio/ungetwc.c
new file mode 100644
index 0000000..25b12b8
--- /dev/null
+++ b/ap/build/uClibc/libc/stdio/ungetwc.c
@@ -0,0 +1,49 @@
+/* Copyright (C) 2004 Manuel Novoa III <mjn3@codepoet.org>
+ *
+ * GNU Library General Public License (LGPL) version 2 or later.
+ *
+ * Dedicated to Toni. See uClibc/DEDICATION.mjn3 for details.
+ */
+
+#include "_stdio.h"
+
+/* Note: This is the application-callable ungetwc. If wscanf calls this, it
+ * should also set stream->__ungot[1] to 0 if this is the only ungot, as well
+ * as reset stream->__ungot_width[1] for use by _stdio_adjpos().
+ */
+
+wint_t ungetwc(wint_t c, register FILE *stream)
+{
+ __STDIO_AUTO_THREADLOCK_VAR;
+
+ __STDIO_AUTO_THREADLOCK(stream);
+ __STDIO_STREAM_VALIDATE(stream); /* debugging only */
+
+ /* Note: Even if c == WEOF, we need to initialize/verify the
+ * stream's orientation and ensure the stream is in reading
+ * mode (if readable and properly oriented). */
+ if ((!__STDIO_STREAM_IS_WIDE_READING(stream)
+ && __STDIO_STREAM_TRANS_TO_READ(stream, __FLAG_WIDE))
+ || ((stream->__modeflags & __FLAG_UNGOT)
+ && ((stream->__modeflags & 1) || stream->__ungot[1]))
+ || (c == WEOF)
+ ) {
+ c = WEOF;
+ } else {
+ /* In the wide case, getc macros should already be disabled. */
+ /* __STDIO_STREAM_DISABLE_GETC(stream); */
+
+ /* Flag this as a user ungot, as scanf does the necessary fixup. */
+ stream->__ungot[1] = 1;
+ stream->__ungot[(++stream->__modeflags) & 1] = c;
+ /* Note: ungot_width is handled by fgetwc. */
+
+ __STDIO_STREAM_CLEAR_EOF(stream); /* Must clear end-of-file flag. */
+ }
+
+ __STDIO_STREAM_VALIDATE(stream);
+ __STDIO_AUTO_THREADUNLOCK(stream);
+
+ return c;
+}
+libc_hidden_def(ungetwc)