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| author | Jakub Jelinek <jakub@redhat.com> | 2005-10-03 20:44:20 +0000 |
|---|---|---|
| committer | Jakub Jelinek <jakub@redhat.com> | 2005-10-03 20:44:20 +0000 |
| commit | a5a11654ea5ea89bfffb295fbb2f17cbb45839b6 (patch) | |
| tree | 2078fd7b828ae3b4c030e6722c53bdc81542a511 /libio/iofgets.c | |
| parent | 6543cff055c298ea3ec718b356f6c2115e8797ae (diff) | |
| download | glibc-a5a11654ea5ea89bfffb295fbb2f17cbb45839b6.tar.gz glibc-a5a11654ea5ea89bfffb295fbb2f17cbb45839b6.tar.xz glibc-a5a11654ea5ea89bfffb295fbb2f17cbb45839b6.zip | |
Updated to fedora-glibc-20051003T2040
Diffstat (limited to 'libio/iofgets.c')
| -rw-r--r-- | libio/iofgets.c | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/libio/iofgets.c b/libio/iofgets.c index 879cc975a3..601b1746a1 100644 --- a/libio/iofgets.c +++ b/libio/iofgets.c @@ -1,4 +1,4 @@ -/* Copyright (C) 1993, 1995, 1996, 1997, 1998, 1999, 2002, 2003 +/* Copyright (C) 1993, 1995, 1996, 1997, 1998, 1999, 2002, 2003, 2005 Free Software Foundation, Inc. This file is part of the GNU C Library. @@ -41,6 +41,14 @@ _IO_fgets (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] = '\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 |