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-rw-r--r--libio/iofgetws_u.c10
1 files changed, 9 insertions, 1 deletions
diff --git a/libio/iofgetws_u.c b/libio/iofgetws_u.c
index 1253564566..9fb8a5cac1 100644
--- a/libio/iofgetws_u.c
+++ b/libio/iofgetws_u.c
@@ -1,4 +1,4 @@
-/* Copyright (C) 1993, 95, 96, 97, 98, 99 Free Software Foundation, Inc.
+/* Copyright (C) 1993, 95, 96, 97, 98, 99, 2005 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
@@ -40,6 +40,14 @@ fgetws_unlocked (buf, n, fp)
CHECK_FILE (fp, NULL);
if (n <= 0)
return NULL;
+ if (__builtin_expect (n == 1, 0))
+ {
+ /* Another irregular case: since we have to store a NUL byte and
+ there is only room for exactly one byte, we don't have to
+ read anything. */
+ buf[0] = L'\0';
+ return buf;
+ }
/* This is very tricky since a file descriptor may be in the
non-blocking mode. The error flag doesn't mean much in this
case. We return an error only when there is a new error. */