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| author | Jeff Johnston <jjohnstn@redhat.com> | 2006-02-20 23:24:00 +0000 |
|---|---|---|
| committer | Jeff Johnston <jjohnstn@redhat.com> | 2006-02-20 23:24:00 +0000 |
| commit | 99db626d210c747e8e8da2de09afb523547329bc (patch) | |
| tree | 98ef3a36cf857e0528f6e3e4666fbc471c729919 /newlib/libc/stdio/fseek.c | |
| parent | 8aaf07c7a2029da9a87e5a751b75568e129e510c (diff) | |
| download | cygnal-99db626d210c747e8e8da2de09afb523547329bc.tar.gz cygnal-99db626d210c747e8e8da2de09afb523547329bc.tar.bz2 cygnal-99db626d210c747e8e8da2de09afb523547329bc.zip | |
2006-02-20 Jeff Johnston <jjohnstn@redhat.com>
* libc/stdio/fflush.c (fflush): For an fflush on a read-only
stream, turn off fseek/rewind optimization as per POSIX/SUSv3.
* libc/stdio/fseek.c (_fseek_r): After a successful unoptimized
seek, turn off the __SNPT no-optimization flag.
Diffstat (limited to 'newlib/libc/stdio/fseek.c')
| -rw-r--r-- | newlib/libc/stdio/fseek.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/newlib/libc/stdio/fseek.c b/newlib/libc/stdio/fseek.c index 2ad98551c..8b189ba17 100644 --- a/newlib/libc/stdio/fseek.c +++ b/newlib/libc/stdio/fseek.c @@ -359,6 +359,13 @@ dumb: fp->_r = 0; /* fp->_w = 0; *//* unnecessary (I think...) */ fp->_flags &= ~__SEOF; + /* Reset no-optimization flag after successful seek. The + no-optimization flag may be set in the case of a read + stream that is flushed which by POSIX/SUSv3 standards, + means that a corresponding seek must not optimize. The + optimization is then allowed if no subsequent flush + is performed. */ + fp->_flags &= ~__SNPT; _funlockfile (fp); return 0; } |