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(_IO_new_file_overflow): Handle switching to write mode from read of backup buffer.

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This commit is contained in:
Ulrich Drepper
2003-09-06 05:16:44 +00:00
parent edc7ae4623
commit 483b8cc6cf
1 changed files with 17 additions and 6 deletions
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23
libio/fileops.c
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@ -841,12 +841,23 @@ _IO_new_file_overflow (f, ch)
makes room for subsequent output. makes room for subsequent output.
Otherwise, set the read pointers to _IO_read_end (leaving that Otherwise, set the read pointers to _IO_read_end (leaving that
alone, so it can continue to correspond to the external position). */ alone, so it can continue to correspond to the external position). */
if (f->_IO_read_ptr == f->_IO_buf_end) if (__builtin_expect (_IO_in_backup (f), 0))
f->_IO_read_end = f->_IO_read_ptr = f->_IO_buf_base; {
f->_IO_write_ptr = f->_IO_read_ptr; size_t nbackup = f->_IO_read_end - f->_IO_read_ptr;
f->_IO_write_base = f->_IO_write_ptr; _IO_free_backup_area (f);
f->_IO_write_end = f->_IO_buf_end; f->_IO_read_base -= MIN (nbackup,
f->_IO_read_base = f->_IO_read_ptr = f->_IO_read_end; 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; f->_flags |= _IO_CURRENTLY_PUTTING;
if (f->_mode <= 0 && f->_flags & (_IO_LINE_BUF+_IO_UNBUFFERED)) if (f->_mode <= 0 && f->_flags & (_IO_LINE_BUF+_IO_UNBUFFERED))