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authorUlrich Drepper <drepper@redhat.com>2005-09-27 00:00:42 +0000
committerUlrich Drepper <drepper@redhat.com>2005-09-27 00:00:42 +0000
commitb5d839c996d7236ed5788296b4d723e67ec4fdb8 (patch)
treea5220f793e6180e189b99ab8c59401ab01a26f71 /libio/iofgetws_u.c
parent9a5933834ba8f1289024c1ab13e1cd711b5ec3af (diff)
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[BZ #713]
2005-09-26 Ulrich Drepper <drepper@redhat.com> [BZ #713] * libio/iofgets.c: Treat N==1 correctly. * libio/iofgets_u.c: Likewise. * libio/iofgetws.c: Likewise. * libio/iofgetws_u.c: Likewise. * stdio-common/Makefile (tests): Add tst-fgets. * stdio-common/tst-fgets.c: New file.
Diffstat (limited to 'libio/iofgetws_u.c')
-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. */