diff options
Diffstat (limited to 'libio/wfileops.c')
| -rw-r--r-- | libio/wfileops.c | 25 |
1 files changed, 20 insertions, 5 deletions
diff --git a/libio/wfileops.c b/libio/wfileops.c index c5ec5f7a27..6a088b1c15 100644 --- a/libio/wfileops.c +++ b/libio/wfileops.c @@ -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; |