755 lines
22 KiB
C
755 lines
22 KiB
C
/* Copyright (C) 1993, 95, 97, 98, 99, 2000 Free Software Foundation, Inc.
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This file is part of the GNU IO Library.
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Written by Ulrich Drepper <drepper@cygnus.com>.
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Based on the single byte version by Per Bothner <bothner@cygnus.com>.
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License as
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published by the Free Software Foundation; either version 2, or (at
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your option) any later version.
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This library is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this library; see the file COPYING. If not, write to
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the Free Software Foundation, 59 Temple Place - Suite 330, Boston,
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MA 02111-1307, USA.
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As a special exception, if you link this library with files
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compiled with a GNU compiler to produce an executable, this does
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not cause the resulting executable to be covered by the GNU General
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Public License. This exception does not however invalidate any
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other reasons why the executable file might be covered by the GNU
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General Public License. */
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#include <assert.h>
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#include <libioP.h>
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#ifdef _GLIBCPP_USE_WCHAR_T
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#include <wchar.h>
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#ifdef HAVE_GCONV_H
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# include <gconv.h>
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#endif
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#include <stdlib.h>
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#include <string.h>
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#ifndef _LIBC
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# define _IO_new_do_write _IO_do_write
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# define _IO_new_file_attach _IO_file_attach
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# define _IO_new_file_close_it _IO_file_close_it
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# define _IO_new_file_finish _IO_file_finish
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# define _IO_new_file_fopen _IO_file_fopen
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# define _IO_new_file_init _IO_file_init
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# define _IO_new_file_setbuf _IO_file_setbuf
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# define _IO_new_file_sync _IO_file_sync
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# define _IO_new_file_overflow _IO_file_overflow
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# define _IO_new_file_seekoff _IO_file_seekoff
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# define _IO_new_file_underflow _IO_file_underflow
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# define _IO_new_file_write _IO_file_write
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# define _IO_new_file_xsputn _IO_file_xsputn
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#endif
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_IO_FILE *
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_IO_wfile_setbuf (fp, p, len)
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_IO_FILE *fp;
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wchar_t *p;
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_IO_ssize_t len;
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{
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if (_IO_wdefault_setbuf (fp, p, len) == NULL)
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return NULL;
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fp->_wide_data->_IO_write_base = fp->_wide_data->_IO_write_ptr =
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fp->_wide_data->_IO_write_end = fp->_wide_data->_IO_buf_base;
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_IO_wsetg (fp, fp->_wide_data->_IO_buf_base, fp->_wide_data->_IO_buf_base,
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fp->_wide_data->_IO_buf_base);
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return fp;
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}
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/* Convert TO_DO wide character from DATA to FP.
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Then mark FP as having empty buffers. */
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int
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_IO_wdo_write (fp, data, to_do)
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_IO_FILE *fp;
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const wchar_t *data;
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_IO_size_t to_do;
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{
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struct _IO_codecvt *cc = fp->_codecvt;
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if (to_do > 0)
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{
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if (fp->_IO_write_end == fp->_IO_write_ptr
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&& fp->_IO_write_end != fp->_IO_write_base)
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{
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if (_IO_new_do_write (fp, fp->_IO_write_base,
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fp->_IO_write_ptr - fp->_IO_write_base) == EOF)
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return EOF;
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}
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do
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{
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enum __codecvt_result result;
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const wchar_t *new_data;
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/* Now convert from the internal format into the external buffer. */
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result = (*cc->__codecvt_do_out) (cc, &fp->_wide_data->_IO_state,
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data, data + to_do, &new_data,
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fp->_IO_write_ptr,
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fp->_IO_buf_end,
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&fp->_IO_write_ptr);
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/* Write out what we produced so far. */
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if (_IO_new_do_write (fp, fp->_IO_write_base,
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fp->_IO_write_ptr - fp->_IO_write_base) == EOF)
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/* Something went wrong. */
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return EOF;
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to_do -= new_data - data;
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/* Next see whether we had problems during the conversion. If yes,
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we cannot go on. */
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if (result != __codecvt_ok
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&& (result != __codecvt_partial || new_data - data == 0))
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break;
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data = new_data;
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}
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while (to_do > 0);
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}
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_IO_wsetg (fp, fp->_wide_data->_IO_buf_base, fp->_wide_data->_IO_buf_base,
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fp->_wide_data->_IO_buf_base);
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fp->_wide_data->_IO_write_base = fp->_wide_data->_IO_write_ptr
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= fp->_wide_data->_IO_buf_base;
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fp->_wide_data->_IO_write_end = ((fp->_flags & (_IO_LINE_BUF+_IO_UNBUFFERED))
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? fp->_wide_data->_IO_buf_base
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: fp->_wide_data->_IO_buf_end);
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return to_do == 0 ? 0 : WEOF;
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}
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wint_t
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_IO_wfile_underflow (fp)
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_IO_FILE *fp;
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{
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struct _IO_codecvt *cd;
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enum __codecvt_result status;
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_IO_ssize_t count;
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int tries;
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const char *read_ptr_copy;
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if (fp->_flags & _IO_NO_READS)
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{
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fp->_flags |= _IO_ERR_SEEN;
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__set_errno (EBADF);
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return WEOF;
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}
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if (fp->_wide_data->_IO_read_ptr < fp->_wide_data->_IO_read_end)
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return *fp->_wide_data->_IO_read_ptr;
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cd = fp->_codecvt;
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/* Maybe there is something left in the external buffer. */
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if (fp->_IO_read_ptr < fp->_IO_read_end)
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{
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/* Convert it. */
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size_t avail_bytes = fp->_IO_read_end - fp->_IO_read_ptr;
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if (avail_bytes >= (*cd->__codecvt_do_max_length) (cd))
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{
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/* There is more in the external. */
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const char *read_stop = (const char *) fp->_IO_read_ptr;
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fp->_wide_data->_IO_last_state = fp->_wide_data->_IO_state;
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status = (*cd->__codecvt_do_in) (cd, &fp->_wide_data->_IO_state,
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fp->_IO_read_ptr, fp->_IO_read_end,
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&read_stop,
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fp->_wide_data->_IO_read_end,
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fp->_wide_data->_IO_buf_end,
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&fp->_wide_data->_IO_read_end);
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fp->_IO_read_ptr = (char *) read_stop;
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/* If we managed to generate some text return the next character. */
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if (fp->_wide_data->_IO_read_ptr < fp->_wide_data->_IO_read_end)
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return *fp->_wide_data->_IO_read_ptr;
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if (status == __codecvt_error)
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{
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__set_errno (EILSEQ);
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fp->_flags |= _IO_ERR_SEEN;
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return WEOF;
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}
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}
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/* Move the remaining content of the read buffer to the beginning. */
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memmove (fp->_IO_buf_base, fp->_IO_read_ptr,
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fp->_IO_read_end - fp->_IO_read_ptr);
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fp->_IO_read_end = (fp->_IO_buf_base
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+ (fp->_IO_read_end - fp->_IO_read_ptr));
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fp->_IO_read_base = fp->_IO_read_ptr = fp->_IO_buf_base;
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}
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else
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fp->_IO_read_base = fp->_IO_read_ptr = fp->_IO_read_end =
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fp->_IO_buf_base;
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if (fp->_IO_buf_base == NULL)
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{
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/* Maybe we already have a push back pointer. */
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if (fp->_IO_save_base != NULL)
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{
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free (fp->_IO_save_base);
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fp->_flags &= ~_IO_IN_BACKUP;
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}
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_IO_doallocbuf (fp);
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fp->_IO_read_base = fp->_IO_read_ptr = fp->_IO_read_end =
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fp->_IO_buf_base;
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}
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fp->_IO_write_base = fp->_IO_write_ptr = fp->_IO_write_end =
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fp->_IO_buf_base;
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if (fp->_wide_data->_IO_buf_base == NULL)
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{
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/* Maybe we already have a push back pointer. */
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if (fp->_wide_data->_IO_save_base != NULL)
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{
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free (fp->_wide_data->_IO_save_base);
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fp->_flags &= ~_IO_IN_BACKUP;
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}
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_IO_wdoallocbuf (fp);
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}
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/* Flush all line buffered files before reading. */
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/* FIXME This can/should be moved to genops ?? */
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if (fp->_flags & (_IO_LINE_BUF|_IO_UNBUFFERED))
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_IO_flush_all_linebuffered ();
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_IO_switch_to_get_mode (fp);
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fp->_wide_data->_IO_read_base = fp->_wide_data->_IO_read_ptr =
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fp->_wide_data->_IO_buf_base;
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fp->_wide_data->_IO_read_end = fp->_wide_data->_IO_buf_base;
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fp->_wide_data->_IO_write_base = fp->_wide_data->_IO_write_ptr =
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fp->_wide_data->_IO_write_end = fp->_wide_data->_IO_buf_base;
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tries = 0;
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again:
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count = _IO_SYSREAD (fp, fp->_IO_read_end,
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fp->_IO_buf_end - fp->_IO_read_end);
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if (count <= 0)
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{
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if (count == 0 && tries == 0)
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fp->_flags |= _IO_EOF_SEEN;
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else
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fp->_flags |= _IO_ERR_SEEN, count = 0;
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}
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fp->_IO_read_end += count;
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if (count == 0)
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{
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if (tries != 0)
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/* There are some bytes in the external buffer but they don't
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convert to anything. */
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__set_errno (EILSEQ);
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return WEOF;
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}
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if (fp->_offset != _IO_pos_BAD)
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_IO_pos_adjust (fp->_offset, count);
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/* Now convert the read input. */
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fp->_wide_data->_IO_last_state = fp->_wide_data->_IO_state;
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fp->_IO_read_base = fp->_IO_read_ptr;
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status = (*cd->__codecvt_do_in) (cd, &fp->_wide_data->_IO_state,
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fp->_IO_read_ptr, fp->_IO_read_end,
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&read_ptr_copy,
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fp->_wide_data->_IO_read_end,
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fp->_wide_data->_IO_buf_end,
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&fp->_wide_data->_IO_read_end);
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fp->_IO_read_ptr = (char *) read_ptr_copy;
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if (fp->_wide_data->_IO_read_end == fp->_wide_data->_IO_buf_base)
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{
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if (status == __codecvt_error || fp->_IO_read_end == fp->_IO_buf_end)
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{
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__set_errno (EILSEQ);
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fp->_flags |= _IO_ERR_SEEN;
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return WEOF;
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}
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/* The read bytes make no complete character. Try reading again. */
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assert (status == __codecvt_partial);
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++tries;
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goto again;
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}
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return *fp->_wide_data->_IO_read_ptr;
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}
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wint_t
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_IO_wfile_overflow (f, wch)
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_IO_FILE *f;
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wint_t wch;
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{
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if (f->_flags & _IO_NO_WRITES) /* SET ERROR */
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{
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f->_flags |= _IO_ERR_SEEN;
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__set_errno (EBADF);
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return WEOF;
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}
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/* If currently reading or no buffer allocated. */
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if ((f->_flags & _IO_CURRENTLY_PUTTING) == 0)
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{
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/* Allocate a buffer if needed. */
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if (f->_wide_data->_IO_write_base == 0)
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{
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_IO_wdoallocbuf (f);
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_IO_wsetg (f, f->_wide_data->_IO_buf_base,
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f->_wide_data->_IO_buf_base, f->_wide_data->_IO_buf_base);
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if (f->_IO_write_base == NULL)
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{
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_IO_doallocbuf (f);
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_IO_setg (f, f->_IO_buf_base, f->_IO_buf_base, f->_IO_buf_base);
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}
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}
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else
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{
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/* Otherwise must be currently reading. If _IO_read_ptr
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(and hence also _IO_read_end) is at the buffer end,
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logically slide the buffer forwards one block (by setting
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the read pointers to all point at the beginning of the
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block). This makes room for subsequent output.
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Otherwise, set the read pointers to _IO_read_end (leaving
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that alone, so it can continue to correspond to the
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external position). */
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if (f->_wide_data->_IO_read_ptr == f->_wide_data->_IO_buf_end)
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{
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f->_IO_read_end = f->_IO_read_ptr = f->_IO_buf_base;
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f->_wide_data->_IO_read_end = f->_wide_data->_IO_read_ptr =
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f->_wide_data->_IO_buf_base;
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}
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}
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f->_wide_data->_IO_write_ptr = f->_wide_data->_IO_read_ptr;
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f->_wide_data->_IO_write_base = f->_wide_data->_IO_write_ptr;
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f->_wide_data->_IO_write_end = f->_wide_data->_IO_buf_end;
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f->_wide_data->_IO_read_base = f->_wide_data->_IO_read_ptr =
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f->_wide_data->_IO_read_end;
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f->_IO_write_ptr = f->_IO_read_ptr;
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f->_IO_write_base = f->_IO_write_ptr;
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f->_IO_write_end = f->_IO_buf_end;
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f->_IO_read_base = f->_IO_read_ptr = f->_IO_read_end;
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f->_flags |= _IO_CURRENTLY_PUTTING;
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if (f->_flags & (_IO_LINE_BUF+_IO_UNBUFFERED))
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f->_wide_data->_IO_write_end = f->_wide_data->_IO_write_ptr;
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}
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if (wch == WEOF)
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return _IO_do_flush (f);
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if (f->_wide_data->_IO_write_ptr == f->_wide_data->_IO_buf_end)
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/* Buffer is really full */
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if (_IO_do_flush (f) == WEOF)
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return WEOF;
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*f->_wide_data->_IO_write_ptr++ = wch;
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if ((f->_flags & _IO_UNBUFFERED)
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|| ((f->_flags & _IO_LINE_BUF) && wch == L'\n'))
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if (_IO_do_flush (f) == WEOF)
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return WEOF;
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return wch;
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}
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wint_t
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_IO_wfile_sync (fp)
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_IO_FILE *fp;
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{
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_IO_ssize_t delta;
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wint_t retval = 0;
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/* char* ptr = cur_ptr(); */
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if (fp->_wide_data->_IO_write_ptr > fp->_wide_data->_IO_write_base)
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if (_IO_do_flush (fp))
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return WEOF;
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delta = fp->_wide_data->_IO_read_ptr - fp->_wide_data->_IO_read_end;
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if (delta != 0)
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{
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/* We have to find out how many bytes we have to go back in the
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external buffer. */
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struct _IO_codecvt *cv = fp->_codecvt;
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_IO_off64_t new_pos;
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int clen = (*cv->__codecvt_do_encoding) (cv);
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if (clen > 0)
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/* It is easy, a fixed number of input bytes are used for each
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wide character. */
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delta *= clen;
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else
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{
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/* We have to find out the hard way how much to back off.
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To do this we determine how much input we needed to
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generate the wide characters up to the current reading
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position. */
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int nread;
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fp->_wide_data->_IO_state = fp->_wide_data->_IO_last_state;
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nread = (*cv->__codecvt_do_length) (cv, &fp->_wide_data->_IO_state,
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fp->_IO_read_base,
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fp->_IO_read_end, delta);
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fp->_IO_read_ptr = fp->_IO_read_base + nread;
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delta = -(fp->_IO_read_end - fp->_IO_read_base - nread);
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}
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new_pos = _IO_SYSSEEK (fp, delta, 1);
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if (new_pos != (_IO_off64_t) EOF)
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{
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fp->_wide_data->_IO_read_end = fp->_wide_data->_IO_read_ptr;
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fp->_IO_read_end = fp->_IO_read_ptr;
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}
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#ifdef ESPIPE
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else if (errno == ESPIPE)
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; /* Ignore error from unseekable devices. */
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#endif
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else
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retval = WEOF;
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}
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if (retval != WEOF)
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fp->_offset = _IO_pos_BAD;
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/* FIXME: Cleanup - can this be shared? */
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/* setg(base(), ptr, ptr); */
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return retval;
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}
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_IO_off64_t
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_IO_wfile_seekoff (fp, offset, dir, mode)
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_IO_FILE *fp;
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_IO_off64_t offset;
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int dir;
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int mode;
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{
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_IO_off64_t result;
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_IO_off64_t delta, new_offset;
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long int count;
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/* POSIX.1 8.2.3.7 says that after a call the fflush() the file
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offset of the underlying file must be exact. */
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int must_be_exact = ((fp->_wide_data->_IO_read_base
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== fp->_wide_data->_IO_read_end)
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&& (fp->_wide_data->_IO_write_base
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== fp->_wide_data->_IO_write_ptr));
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if (mode == 0)
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dir = _IO_seek_cur, offset = 0; /* Don't move any pointers. */
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/* Flush unwritten characters.
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(This may do an unneeded write if we seek within the buffer.
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But to be able to switch to reading, we would need to set
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egptr to ptr. That can't be done in the current design,
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which assumes file_ptr() is eGptr. Anyway, since we probably
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end up flushing when we close(), it doesn't make much difference.)
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FIXME: simulate mem-papped files. */
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if (fp->_wide_data->_IO_write_ptr > fp->_wide_data->_IO_write_base
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|| _IO_in_put_mode (fp))
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if (_IO_switch_to_wget_mode (fp))
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return WEOF;
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if (fp->_wide_data->_IO_buf_base == NULL)
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{
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/* It could be that we already have a pushback buffer. */
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if (fp->_wide_data->_IO_read_base != NULL)
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{
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free (fp->_wide_data->_IO_read_base);
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fp->_flags &= ~_IO_IN_BACKUP;
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}
|
|
_IO_doallocbuf (fp);
|
|
_IO_setp (fp, fp->_IO_buf_base, fp->_IO_buf_base);
|
|
_IO_setg (fp, fp->_IO_buf_base, fp->_IO_buf_base, fp->_IO_buf_base);
|
|
_IO_wsetp (fp, fp->_wide_data->_IO_buf_base,
|
|
fp->_wide_data->_IO_buf_base);
|
|
_IO_wsetg (fp, fp->_wide_data->_IO_buf_base,
|
|
fp->_wide_data->_IO_buf_base, fp->_wide_data->_IO_buf_base);
|
|
}
|
|
|
|
switch (dir)
|
|
{
|
|
struct _IO_codecvt *cv;
|
|
int clen;
|
|
|
|
case _IO_seek_cur:
|
|
/* Adjust for read-ahead (bytes is buffer). To do this we must
|
|
find out which position in the external buffer corresponds to
|
|
the current position in the internal buffer. */
|
|
cv = fp->_codecvt;
|
|
clen = (*cv->__codecvt_do_encoding) (cv);
|
|
|
|
if (clen > 0)
|
|
offset -= (fp->_wide_data->_IO_read_end
|
|
- fp->_wide_data->_IO_read_ptr) * clen;
|
|
else
|
|
{
|
|
int nread;
|
|
|
|
delta = fp->_wide_data->_IO_read_ptr - fp->_wide_data->_IO_read_end;
|
|
fp->_wide_data->_IO_state = fp->_wide_data->_IO_last_state;
|
|
nread = (*cv->__codecvt_do_length) (cv, &fp->_wide_data->_IO_state,
|
|
fp->_IO_read_base,
|
|
fp->_IO_read_end, delta);
|
|
fp->_IO_read_ptr = fp->_IO_read_base + nread;
|
|
offset -= fp->_IO_read_end - fp->_IO_read_base - nread;
|
|
}
|
|
|
|
if (fp->_offset == _IO_pos_BAD)
|
|
goto dumb;
|
|
/* Make offset absolute, assuming current pointer is file_ptr(). */
|
|
offset += fp->_offset;
|
|
|
|
dir = _IO_seek_set;
|
|
break;
|
|
case _IO_seek_set:
|
|
break;
|
|
case _IO_seek_end:
|
|
{
|
|
struct _G_stat64 st;
|
|
if (_IO_SYSSTAT (fp, &st) == 0 && S_ISREG (st.st_mode))
|
|
{
|
|
offset += st.st_size;
|
|
dir = _IO_seek_set;
|
|
}
|
|
else
|
|
goto dumb;
|
|
}
|
|
}
|
|
/* At this point, dir==_IO_seek_set. */
|
|
|
|
/* If we are only interested in the current position we've found it now. */
|
|
if (mode == 0)
|
|
return offset;
|
|
|
|
/* If destination is within current buffer, optimize: */
|
|
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)
|
|
{
|
|
#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)
|
|
{
|
|
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. */
|
|
do
|
|
{
|
|
|
|
}
|
|
while (0);
|
|
|
|
_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
|
|
_IO_unsave_markers (fp);
|
|
#endif
|
|
|
|
if (fp->_flags & _IO_NO_READS)
|
|
goto dumb;
|
|
|
|
/* Try to seek to a block boundary, to improve kernel page management. */
|
|
new_offset = offset & ~(fp->_IO_buf_end - fp->_IO_buf_base - 1);
|
|
delta = offset - new_offset;
|
|
if (delta > fp->_IO_buf_end - fp->_IO_buf_base)
|
|
{
|
|
new_offset = offset;
|
|
delta = 0;
|
|
}
|
|
result = _IO_SYSSEEK (fp, new_offset, 0);
|
|
if (result < 0)
|
|
return EOF;
|
|
if (delta == 0)
|
|
count = 0;
|
|
else
|
|
{
|
|
count = _IO_SYSREAD (fp, fp->_IO_buf_base,
|
|
(must_be_exact
|
|
? delta : fp->_IO_buf_end - fp->_IO_buf_base));
|
|
if (count < delta)
|
|
{
|
|
/* We weren't allowed to read, but try to seek the remainder. */
|
|
offset = count == EOF ? delta : delta-count;
|
|
dir = _IO_seek_cur;
|
|
goto dumb;
|
|
}
|
|
}
|
|
_IO_setg (fp, fp->_IO_buf_base, fp->_IO_buf_base + delta,
|
|
fp->_IO_buf_base + count);
|
|
_IO_setp (fp, fp->_IO_buf_base, fp->_IO_buf_base);
|
|
fp->_offset = result + count;
|
|
_IO_mask_flags (fp, 0, _IO_EOF_SEEN);
|
|
return offset;
|
|
dumb:
|
|
|
|
_IO_unsave_markers (fp);
|
|
result = _IO_SYSSEEK (fp, offset, dir);
|
|
if (result != EOF)
|
|
{
|
|
_IO_mask_flags (fp, 0, _IO_EOF_SEEN);
|
|
fp->_offset = result;
|
|
_IO_setg (fp, fp->_IO_buf_base, fp->_IO_buf_base, fp->_IO_buf_base);
|
|
_IO_setp (fp, fp->_IO_buf_base, fp->_IO_buf_base);
|
|
}
|
|
return result;
|
|
|
|
resync:
|
|
/* We need to do it since it is possible that the file offset in
|
|
the kernel may be changed behind our back. It may happen when
|
|
we fopen a file and then do a fork. One process may access the
|
|
the file and the kernel file offset will be changed. */
|
|
if (fp->_offset >= 0)
|
|
_IO_SYSSEEK (fp, fp->_offset, 0);
|
|
|
|
return offset;
|
|
}
|
|
|
|
|
|
_IO_size_t
|
|
_IO_wfile_xsputn (f, data, n)
|
|
_IO_FILE *f;
|
|
const void *data;
|
|
_IO_size_t n;
|
|
{
|
|
register const wchar_t *s = (const wchar_t *) data;
|
|
_IO_size_t to_do = n;
|
|
int must_flush = 0;
|
|
_IO_size_t count;
|
|
|
|
if (n <= 0)
|
|
return 0;
|
|
/* This is an optimized implementation.
|
|
If the amount to be written straddles a block boundary
|
|
(or the filebuf is unbuffered), use sys_write directly. */
|
|
|
|
/* First figure out how much space is available in the buffer. */
|
|
count = f->_wide_data->_IO_write_end - f->_wide_data->_IO_write_ptr;
|
|
if ((f->_flags & _IO_LINE_BUF) && (f->_flags & _IO_CURRENTLY_PUTTING))
|
|
{
|
|
count = f->_wide_data->_IO_buf_end - f->_wide_data->_IO_write_ptr;
|
|
if (count >= n)
|
|
{
|
|
register const wchar_t *p;
|
|
for (p = s + n; p > s; )
|
|
{
|
|
if (*--p == L'\n')
|
|
{
|
|
count = p - s + 1;
|
|
must_flush = 1;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
/* Then fill the buffer. */
|
|
if (count > 0)
|
|
{
|
|
if (count > to_do)
|
|
count = to_do;
|
|
if (count > 20)
|
|
{
|
|
#ifdef _LIBC
|
|
f->_wide_data->_IO_write_ptr =
|
|
__wmempcpy (f->_wide_data->_IO_write_ptr, s, count);
|
|
#else
|
|
wmemcpy (f->_wide_data->_IO_write_ptr, s, count);
|
|
f->_wide_data->_IO_write_ptr += count;
|
|
#endif
|
|
s += count;
|
|
}
|
|
else
|
|
{
|
|
register wchar_t *p = f->_wide_data->_IO_write_ptr;
|
|
register int i = (int) count;
|
|
while (--i >= 0)
|
|
*p++ = *s++;
|
|
f->_wide_data->_IO_write_ptr = p;
|
|
}
|
|
to_do -= count;
|
|
}
|
|
if (to_do > 0)
|
|
to_do -= _IO_wdefault_xsputn (f, s, to_do);
|
|
if (must_flush
|
|
&& f->_wide_data->_IO_write_ptr != f->_wide_data->_IO_write_base)
|
|
_IO_wdo_write (f, f->_wide_data->_IO_write_base,
|
|
f->_wide_data->_IO_write_ptr
|
|
- f->_wide_data->_IO_write_base);
|
|
|
|
return n - to_do;
|
|
}
|
|
|
|
|
|
struct _IO_jump_t _IO_wfile_jumps =
|
|
{
|
|
JUMP_INIT_DUMMY,
|
|
JUMP_INIT(finish, _IO_new_file_finish),
|
|
JUMP_INIT(overflow, (_IO_overflow_t) _IO_wfile_overflow),
|
|
JUMP_INIT(underflow, (_IO_underflow_t) _IO_wfile_underflow),
|
|
JUMP_INIT(uflow, (_IO_underflow_t) _IO_wdefault_uflow),
|
|
JUMP_INIT(pbackfail, (_IO_pbackfail_t) _IO_wdefault_pbackfail),
|
|
JUMP_INIT(xsputn, _IO_wfile_xsputn),
|
|
JUMP_INIT(xsgetn, _IO_file_xsgetn),
|
|
JUMP_INIT(seekoff, _IO_wfile_seekoff),
|
|
JUMP_INIT(seekpos, _IO_default_seekpos),
|
|
JUMP_INIT(setbuf, _IO_new_file_setbuf),
|
|
JUMP_INIT(sync, (_IO_sync_t) _IO_wfile_sync),
|
|
JUMP_INIT(doallocate, _IO_wfile_doallocate),
|
|
JUMP_INIT(read, _IO_file_read),
|
|
JUMP_INIT(write, _IO_new_file_write),
|
|
JUMP_INIT(seek, _IO_file_seek),
|
|
JUMP_INIT(close, _IO_file_close),
|
|
JUMP_INIT(stat, _IO_file_stat),
|
|
JUMP_INIT(showmanyc, _IO_default_showmanyc),
|
|
JUMP_INIT(imbue, _IO_default_imbue)
|
|
};
|
|
|
|
#endif /* _GLIBCPP_USE_WCHAR_T */
|