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Don't error out writing a multibyte character to an unbuffered stream (bug 17522)

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This commit is contained in:
Andreas Schwab
2014-10-30 12:18:48 +01:00
parent 4c6da7da9f
commit 04b76b5aa8
5 changed files with 69 additions and 7 deletions
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25
libio/wfileops.c
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@ -75,17 +75,32 @@ _IO_wdo_write (fp, data, to_do)
{
enum __codecvt_result result;
const wchar_t *new_data;
char mb_buf[MB_LEN_MAX];
char *write_base, *write_ptr, *buf_end;
if (fp->_IO_write_ptr - fp->_IO_write_base < sizeof (mb_buf))
{
/* Make sure we have room for at least one multibyte
character. */
write_ptr = write_base = mb_buf;
buf_end = mb_buf + sizeof (mb_buf);
}
else
{
write_ptr = fp->_IO_write_ptr;
write_base = fp->_IO_write_base;
buf_end = fp->_IO_buf_end;
}
/* Now convert from the internal format into the external buffer. */
result = (*cc->__codecvt_do_out) (cc, &fp->_wide_data->_IO_state,
data, data + to_do, &new_data,
fp->_IO_write_ptr,
fp->_IO_buf_end,
&fp->_IO_write_ptr);
write_ptr,
buf_end,
&write_ptr);
/* Write out what we produced so far. */
if (_IO_new_do_write (fp, fp->_IO_write_base,
fp->_IO_write_ptr - fp->_IO_write_base) == EOF)
if (_IO_new_do_write (fp, write_base, write_ptr - write_base) == EOF)
/* Something went wrong. */
return WEOF;