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| author | Ulrich Drepper <drepper@redhat.com> | 2003-09-06 05:16:44 +0000 |
|---|---|---|
| committer | Ulrich Drepper <drepper@redhat.com> | 2003-09-06 05:16:44 +0000 |
| commit | 483b8cc6cfd531611f6141b288a5e16e8010905c (patch) | |
| tree | 4a1bc7ace3f9f72ed854b2e708aeaa0037757bdc /libio/fileops.c | |
| parent | edc7ae4623eeb9a8112a6f89fbc91aae9f90cb6a (diff) | |
| download | glibc-483b8cc6cfd531611f6141b288a5e16e8010905c.zip glibc-483b8cc6cfd531611f6141b288a5e16e8010905c.tar.gz glibc-483b8cc6cfd531611f6141b288a5e16e8010905c.tar.bz2 | |
(_IO_new_file_overflow): Handle switching to write mode from read of backup buffer.
Diffstat (limited to 'libio/fileops.c')
| -rw-r--r-- | libio/fileops.c | 23 |
1 files changed, 17 insertions, 6 deletions
diff --git a/libio/fileops.c b/libio/fileops.c index be683cd..1a63319 100644 --- a/libio/fileops.c +++ b/libio/fileops.c @@ -841,12 +841,23 @@ _IO_new_file_overflow (f, ch) makes room for subsequent output. Otherwise, set the read pointers to _IO_read_end (leaving that alone, so it can continue to correspond to the external position). */ - if (f->_IO_read_ptr == f->_IO_buf_end) - f->_IO_read_end = f->_IO_read_ptr = f->_IO_buf_base; - f->_IO_write_ptr = f->_IO_read_ptr; - f->_IO_write_base = f->_IO_write_ptr; - f->_IO_write_end = f->_IO_buf_end; - f->_IO_read_base = f->_IO_read_ptr = f->_IO_read_end; + if (__builtin_expect (_IO_in_backup (f), 0)) + { + size_t nbackup = f->_IO_read_end - f->_IO_read_ptr; + _IO_free_backup_area (f); + f->_IO_read_base -= MIN (nbackup, + f->_IO_read_base - f->_IO_buf_base); + f->_IO_read_ptr = f->_IO_read_base; + } + else + { + if (f->_IO_read_ptr == f->_IO_buf_end) + f->_IO_read_end = f->_IO_read_ptr = f->_IO_buf_base; + f->_IO_write_ptr = f->_IO_read_ptr; + f->_IO_write_base = f->_IO_write_ptr; + f->_IO_write_end = f->_IO_buf_end; + f->_IO_read_base = f->_IO_read_ptr = f->_IO_read_end; + } f->_flags |= _IO_CURRENTLY_PUTTING; if (f->_mode <= 0 && f->_flags & (_IO_LINE_BUF+_IO_UNBUFFERED)) |