diff options
| -rw-r--r-- | ChangeLog | 6 | ||||
| -rw-r--r-- | libio/wfileops.c | 110 |
2 files changed, 45 insertions, 71 deletions
@@ -1,3 +1,9 @@ +2009-08-31 Andreas Schwab <schwab@redhat.com> + + * libio/wfileops.c (_IO_wfile_seekoff): Remove dead code and + reformulate in-buffer optimisation check to match code in + _IO_new_file_seekoff. + 2009-08-31 Joshua W. Boyer <jwboyer@linux.vnet.ibm.com> * sysdeps/powerpc/powerpc32/power6/memcpy.S: Change srdi instruction diff --git a/libio/wfileops.c b/libio/wfileops.c index 57ed786..be8ae78 100644 --- a/libio/wfileops.c +++ b/libio/wfileops.c @@ -678,88 +678,56 @@ _IO_wfile_seekoff (fp, offset, dir, mode) if (fp->_offset != _IO_pos_BAD && fp->_IO_read_base != NULL && !_IO_in_backup (fp)) { - /* Offset relative to start of main get area. */ - _IO_off64_t rel_offset = (offset - fp->_offset - + (fp->_IO_read_end - fp->_IO_read_base)); - if (rel_offset >= 0) + _IO_off64_t start_offset = (fp->_offset + - (fp->_IO_read_end - fp->_IO_buf_base)); + if (offset >= start_offset && offset < fp->_offset) { -#if 0 - if (_IO_in_backup (fp)) - _IO_switch_to_main_get_area (fp); -#endif - if (rel_offset <= fp->_IO_read_end - fp->_IO_read_base) + enum __codecvt_result status; + struct _IO_codecvt *cd = fp->_codecvt; + const char *read_ptr_copy; + + _IO_setg (fp, fp->_IO_buf_base, + fp->_IO_buf_base + (offset - start_offset), + fp->_IO_read_end); + _IO_setp (fp, fp->_IO_buf_base, fp->_IO_buf_base); + + /* Now set the pointer for the internal buffer. This + might be an iterative process. Though the read + pointer is somewhere in the current external buffer + this does not mean we can convert this whole buffer + at once fitting in the internal buffer. */ + fp->_wide_data->_IO_state = fp->_wide_data->_IO_last_state; + read_ptr_copy = fp->_IO_read_base; + fp->_wide_data->_IO_read_ptr = fp->_wide_data->_IO_read_base; + do { - enum __codecvt_result status; - struct _IO_codecvt *cd = fp->_codecvt; - const char *read_ptr_copy; - - fp->_IO_read_ptr = fp->_IO_read_base + rel_offset; - _IO_setp (fp, fp->_IO_buf_base, fp->_IO_buf_base); - - /* Now set the pointer for the internal buffer. This - might be an iterative process. Though the read - pointer is somewhere in the current external buffer - this does not mean we can convert this whole buffer - at once fitting in the internal buffer. */ - fp->_wide_data->_IO_state = fp->_wide_data->_IO_last_state; - read_ptr_copy = fp->_IO_read_base; - fp->_wide_data->_IO_read_ptr = fp->_wide_data->_IO_read_base; - do + wchar_t buffer[1024]; + wchar_t *ignore; + status = (*cd->__codecvt_do_in) (cd, + &fp->_wide_data->_IO_state, + read_ptr_copy, + fp->_IO_read_ptr, + &read_ptr_copy, + buffer, + buffer + + (sizeof (buffer) + / sizeof (buffer[0])), + &ignore); + if (status != __codecvt_ok && status != __codecvt_partial) { - wchar_t buffer[1024]; - wchar_t *ignore; - status = (*cd->__codecvt_do_in) (cd, - &fp->_wide_data->_IO_state, - read_ptr_copy, - fp->_IO_read_ptr, - &read_ptr_copy, - buffer, - buffer - + (sizeof (buffer) - / sizeof (buffer[0])), - &ignore); - if (status != __codecvt_ok && status != __codecvt_partial) - { - fp->_flags |= _IO_ERR_SEEN; - goto dumb; - } + fp->_flags |= _IO_ERR_SEEN; + goto dumb; } - while (read_ptr_copy != fp->_IO_read_ptr); + } + while (read_ptr_copy != fp->_IO_read_ptr); - fp->_wide_data->_IO_read_ptr = fp->_wide_data->_IO_read_base; + fp->_wide_data->_IO_read_ptr = fp->_wide_data->_IO_read_base; - _IO_mask_flags (fp, 0, _IO_EOF_SEEN); - goto resync; - } -#ifdef TODO - /* If we have streammarkers, seek forward by reading ahead. */ - if (_IO_have_markers (fp)) - { - int to_skip = rel_offset - - (fp->_IO_read_ptr - fp->_IO_read_base); - if (ignore (to_skip) != to_skip) - goto dumb; - _IO_mask_flags (fp, 0, _IO_EOF_SEEN); - goto resync; - } -#endif - } -#ifdef TODO - if (rel_offset < 0 && rel_offset >= Bbase () - Bptr ()) - { - if (!_IO_in_backup (fp)) - _IO_switch_to_backup_area (fp); - gbump (fp->_IO_read_end + rel_offset - fp->_IO_read_ptr); _IO_mask_flags (fp, 0, _IO_EOF_SEEN); goto resync; } -#endif } -#ifdef TODO - INTUSE(_IO_unsave_markers) (fp); -#endif - if (fp->_flags & _IO_NO_READS) goto dumb; |