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c8a89e7d | 1 | /* Copyright (C) 1993, 1997, 1999, 2000, 2002, 2006, 2012 |
1e88bd0f | 2 | Free Software Foundation, Inc. |
41bdb6e2 | 3 | This file is part of the GNU C Library. |
d64b6ad0 | 4 | |
41bdb6e2 AJ |
5 | The GNU C Library is free software; you can redistribute it and/or |
6 | modify it under the terms of the GNU Lesser General Public | |
7 | License as published by the Free Software Foundation; either | |
8 | version 2.1 of the License, or (at your option) any later version. | |
d64b6ad0 | 9 | |
41bdb6e2 AJ |
10 | The GNU C Library is distributed in the hope that it will be useful, |
11 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
d64b6ad0 | 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
41bdb6e2 | 13 | Lesser General Public License for more details. |
d64b6ad0 | 14 | |
41bdb6e2 AJ |
15 | You should have received a copy of the GNU Lesser General Public |
16 | License along with the GNU C Library; if not, write to the Free | |
17 | Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA | |
18 | 02111-1307 USA. | |
d64b6ad0 | 19 | |
41bdb6e2 AJ |
20 | As a special exception, if you link the code in this file with |
21 | files compiled with a GNU compiler to produce an executable, | |
22 | that does not cause the resulting executable to be covered by | |
23 | the GNU Lesser General Public License. This exception does not | |
24 | however invalidate any other reasons why the executable file | |
25 | might be covered by the GNU Lesser General Public License. | |
26 | This exception applies to code released by its copyright holders | |
27 | in files containing the exception. */ | |
d64b6ad0 UD |
28 | |
29 | /* | |
aeb25823 AJ |
30 | Copyright (C) 1990 The Regents of the University of California. |
31 | All rights reserved. | |
32 | ||
33 | Redistribution and use in source and binary forms, with or without | |
34 | modification, are permitted provided that the following conditions | |
35 | are met: | |
36 | ||
37 | 1. Redistributions of source code must retain the above copyright | |
38 | notice, this list of conditions and the following disclaimer. | |
39 | 2. Redistributions in binary form must reproduce the above copyright | |
40 | notice, this list of conditions and the following disclaimer in the | |
41 | documentation and/or other materials provided with the distribution. | |
42 | 4. Neither the name of the University nor the names of its contributors | |
43 | may be used to endorse or promote products derived from this software | |
44 | without specific prior written permission. | |
45 | ||
46 | THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND | |
47 | ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
48 | IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
49 | ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE | |
50 | FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
51 | DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |
52 | OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
53 | HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | |
54 | LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY | |
55 | OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF | |
56 | SUCH DAMAGE.*/ | |
d64b6ad0 UD |
57 | |
58 | /* Modified for GNU iostream by Per Bothner 1991, 1992. */ | |
59 | ||
60 | #ifndef _POSIX_SOURCE | |
61 | # define _POSIX_SOURCE | |
62 | #endif | |
63 | #include "libioP.h" | |
64 | #include <sys/types.h> | |
65 | #include <sys/stat.h> | |
d64b6ad0 UD |
66 | #include <stdlib.h> |
67 | #include <unistd.h> | |
d64b6ad0 UD |
68 | |
69 | #ifdef _LIBC | |
70 | # undef isatty | |
71 | # define isatty(Fd) __isatty (Fd) | |
72 | #endif | |
73 | ||
74 | /* | |
75 | * Allocate a file buffer, or switch to unbuffered I/O. | |
76 | * Per the ANSI C standard, ALL tty devices default to line buffered. | |
77 | * | |
78 | * As a side effect, we set __SOPT or __SNPT (en/dis-able fseek | |
79 | * optimisation) right after the _fstat() that finds the buffer size. | |
80 | */ | |
81 | ||
82 | int | |
83 | _IO_wfile_doallocate (fp) | |
84 | _IO_FILE *fp; | |
85 | { | |
86 | _IO_size_t size; | |
d64b6ad0 | 87 | wchar_t *p; |
d64b6ad0 UD |
88 | |
89 | /* Allocate room for the external buffer. */ | |
9c38a689 | 90 | if (fp->_IO_buf_base == NULL) |
77fe0b9c | 91 | INTUSE(_IO_file_doallocate) (fp); |
d64b6ad0 | 92 | |
1e88bd0f UD |
93 | /* If narrow buffer is user allocated (set by setvbuf etc.), |
94 | use that size as the size of the wide buffer, when it is | |
95 | allocated by _IO_file_doallocate, multiply that by size | |
96 | of the wide character. */ | |
97 | size = fp->_IO_buf_end - fp->_IO_buf_base; | |
98 | if ((fp->_flags & _IO_USER_BUF)) | |
99 | size = (size + sizeof (wchar_t) - 1) / sizeof (wchar_t); | |
5bef2820 | 100 | ALLOC_WBUF (p, size * sizeof (wchar_t), EOF); |
77fe0b9c | 101 | INTUSE(_IO_wsetb) (fp, p, p + size, 1); |
d64b6ad0 UD |
102 | return 1; |
103 | } |