| /* Copyright (C) 1993-2014 Free Software Foundation, Inc. |
| This file is part of the GNU C Library. |
| |
| The GNU C Library is free software; you can redistribute it and/or |
| modify it under the terms of the GNU Lesser General Public |
| License as published by the Free Software Foundation; either |
| version 2.1 of the License, or (at your option) any later version. |
| |
| The GNU C Library is distributed in the hope that it will be useful, |
| but WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| Lesser General Public License for more details. |
| |
| You should have received a copy of the GNU Lesser General Public |
| License along with the GNU C Library; if not, see |
| <http://www.gnu.org/licenses/>. |
| |
| As a special exception, if you link the code in this file with |
| files compiled with a GNU compiler to produce an executable, |
| that does not cause the resulting executable to be covered by |
| the GNU Lesser General Public License. This exception does not |
| however invalidate any other reasons why the executable file |
| might be covered by the GNU Lesser General Public License. |
| This exception applies to code released by its copyright holders |
| in files containing the exception. */ |
| |
| /* |
| Copyright (C) 1990 The Regents of the University of California. |
| All rights reserved. |
| |
| Redistribution and use in source and binary forms, with or without |
| modification, are permitted provided that the following conditions |
| are met: |
| |
| 1. Redistributions of source code must retain the above copyright |
| notice, this list of conditions and the following disclaimer. |
| 2. Redistributions in binary form must reproduce the above copyright |
| notice, this list of conditions and the following disclaimer in the |
| documentation and/or other materials provided with the distribution. |
| 4. Neither the name of the University nor the names of its contributors |
| may be used to endorse or promote products derived from this software |
| without specific prior written permission. |
| |
| THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
| ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
| FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| SUCH DAMAGE.*/ |
| |
| /* Modified for GNU iostream by Per Bothner 1991, 1992. */ |
| |
| #ifndef _POSIX_SOURCE |
| # define _POSIX_SOURCE |
| #endif |
| #include "libioP.h" |
| #include <sys/types.h> |
| #include <sys/stat.h> |
| #include <stdlib.h> |
| #include <unistd.h> |
| |
| #ifdef _LIBC |
| # undef isatty |
| # define isatty(Fd) __isatty (Fd) |
| #endif |
| |
| /* |
| * Allocate a file buffer, or switch to unbuffered I/O. |
| * Per the ANSI C standard, ALL tty devices default to line buffered. |
| * |
| * As a side effect, we set __SOPT or __SNPT (en/dis-able fseek |
| * optimisation) right after the _fstat() that finds the buffer size. |
| */ |
| |
| int |
| _IO_wfile_doallocate (fp) |
| _IO_FILE *fp; |
| { |
| _IO_size_t size; |
| wchar_t *p; |
| |
| /* Allocate room for the external buffer. */ |
| if (fp->_IO_buf_base == NULL) |
| _IO_file_doallocate (fp); |
| |
| /* If narrow buffer is user allocated (set by setvbuf etc.), |
| use that size as the size of the wide buffer, when it is |
| allocated by _IO_file_doallocate, multiply that by size |
| of the wide character. */ |
| size = fp->_IO_buf_end - fp->_IO_buf_base; |
| if ((fp->_flags & _IO_USER_BUF)) |
| size = (size + sizeof (wchar_t) - 1) / sizeof (wchar_t); |
| ALLOC_WBUF (p, size * sizeof (wchar_t), EOF); |
| _IO_wsetb (fp, p, p + size, 1); |
| return 1; |
| } |