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(_IO_wfile_seekoff): Reposition wide pointers and adjust state for seek

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position.
This commit is contained in:
Ulrich Drepper 2002-07-16 00:32:12 +00:00
parent f4c2158322
commit dae8cccd77
1 changed files with 31 additions and 3 deletions
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34
libio/wfileops.c
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@ -161,10 +161,12 @@ _IO_wfile_underflow (fp)
const char *read_stop = (const char *) fp->_IO_read_ptr;
fp->_wide_data->_IO_last_state = fp->_wide_data->_IO_state;
fp->_wide_data->_IO_read_base = fp->_wide_data->_IO_read_ptr =
fp->_wide_data->_IO_buf_base;
status = (*cd->__codecvt_do_in) (cd, &fp->_wide_data->_IO_state,
fp->_IO_read_ptr, fp->_IO_read_end,
&read_stop,
fp->_wide_data->_IO_read_end,
fp->_wide_data->_IO_read_ptr,
fp->_wide_data->_IO_buf_end,
&fp->_wide_data->_IO_read_end);
@ -582,6 +584,10 @@ _IO_wfile_seekoff (fp, offset, dir, mode)
#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;
fp->_IO_read_ptr = fp->_IO_read_base + rel_offset;
_IO_setp (fp, fp->_IO_buf_base, fp->_IO_buf_base);
@ -590,11 +596,33 @@ _IO_wfile_seekoff (fp, offset, dir, mode)
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)
{
fp->_flags |= _IO_ERR_SEEN;
goto dumb;
}
}
while (0);
while (read_ptr_copy != fp->_IO_read_ptr);
fp->_wide_data->_IO_read_ptr = fp->_wide_data->_IO_read_end
= fp->_wide_data->_IO_read_base;
_IO_mask_flags (fp, 0, _IO_EOF_SEEN);
goto resync;