diff options
Diffstat (limited to 'libio/iofgetws.c')
| -rw-r--r-- | libio/iofgetws.c | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/libio/iofgetws.c b/libio/iofgetws.c index 654c051..7753911 100644 --- a/libio/iofgetws.c +++ b/libio/iofgetws.c @@ -1,4 +1,4 @@ -/* Copyright (C) 1993, 1995, 1996, 1997, 1998, 1999, 2001 +/* Copyright (C) 1993, 1995, 1996, 1997, 1998, 1999, 2001, 2005 Free Software Foundation, Inc. This file is part of the GNU C Library. @@ -41,6 +41,14 @@ fgetws (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; + } _IO_acquire_lock (fp); /* This is very tricky since a file descriptor may be in the non-blocking mode. The error flag doesn't mean much in this |