1/*
2Copyright (C) 1994 Free Software Foundation
3
4This file is part of the GNU IO Library.  This library is free
5software; you can redistribute it and/or modify it under the
6terms of the GNU General Public License as published by the
7Free Software Foundation; either version 2, or (at your option)
8any later version.
9
10This library is distributed in the hope that it will be useful,
11but WITHOUT ANY WARRANTY; without even the implied warranty of
12MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
13GNU General Public License for more details.
14
15You should have received a copy of the GNU General Public License
16along with this library; see the file COPYING.  If not, write to the Free
17Software Foundation, 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
18
19As a special exception, if you link this library with files
20compiled with a GNU compiler to produce an executable, this does not cause
21the resulting executable to be covered by the GNU General Public License.
22This exception does not however invalidate any other reasons why
23the executable file might be covered by the GNU General Public License. */
24
25
26/* This file provides definitions of _IO_stdin, _IO_stdout, and _IO_stderr
27   for C++ code.  Compare stdfiles.c.
28   (The difference is that here the vtable field is set to
29   point to builtinbuf's vtable, so the objects are effectively
30   of class builtinbuf.) */
31
32#include "libioP.h"
33#include <stdio.h>
34
35#if !defined(filebuf_vtable) && defined(__cplusplus)
36#ifdef __GNUC__
37extern char filebuf_vtable[]
38  asm (_G_VTABLE_LABEL_PREFIX
39#if _G_VTABLE_LABEL_HAS_LENGTH
40       "7"
41#endif
42       "filebuf");
43#else /* !__GNUC__ */
44#if _G_VTABLE_LABEL_HAS_LENGTH
45#define filebuf_vtable _G_VTABLE_LABEL_PREFIX_ID##7filebuf
46#else
47#define filebuf_vtable _G_VTABLE_LABEL_PREFIX_ID##filebuf
48#endif
49extern char filebuf_vtable[];
50#endif /* !__GNUC__ */
51#endif /* !defined(filebuf_vtable) && defined(__cplusplus) */
52
53#ifndef STD_VTABLE
54#define STD_VTABLE (const struct _IO_jump_t *)filebuf_vtable
55#endif
56
57#ifdef _STDIO_USES_IOSTREAM
58#ifdef _IO_MTSAFE_IO
59#define DEF_STDFILE(NAME, FD, CHAIN, FLAGS) \
60  static _IO_lock_t _IO_stdfile_##FD##_lock = _IO_lock_initializer; \
61  struct _IO_FILE_plus NAME \
62    = {FILEBUF_LITERAL(CHAIN, FLAGS, FD, NULL), STD_VTABLE}
63#else
64#define DEF_STDFILE(NAME, FD, CHAIN, FLAGS) \
65  struct _IO_FILE_plus NAME = {FILEBUF_LITERAL(CHAIN, FLAGS, FD, NULL), STD_VTABLE}
66#endif
67
68DEF_STDFILE(_IO_stdin_, 0, 0, _IO_NO_WRITES);
69DEF_STDFILE(_IO_stdout_, 1, &_IO_stdin_.file, _IO_NO_READS);
70DEF_STDFILE(_IO_stderr_, 2, &_IO_stdout_.file,
71            _IO_NO_READS+_IO_UNBUFFERED);
72
73_IO_FILE_plus *_IO_list_all = &_IO_stderr_;
74#else /* !_STDIO_USES_IOSTREAM */
75#include "stdiostream.h"
76
77struct _IO_fake_stdiobuf {
78  struct {
79    _IO_FILE file;
80    const void *vtable;
81  } s;
82  FILE *stdio_file;
83};
84
85/* Define stdiobuf_vtable as a name for the virtual function table
86   of the stdiobuf class. */
87#ifndef stdiobuf_vtable
88#ifdef __GNUC__
89extern struct _IO_jump_t stdiobuf_vtable
90  asm (_G_VTABLE_LABEL_PREFIX
91#if _G_VTABLE_LABEL_HAS_LENGTH
92       "8"
93#endif
94       "stdiobuf");
95#else /* !__GNUC__ */
96#if _G_VTABLE_LABEL_HAS_LENGTH
97#define stdiobuf_vtable _G_VTABLE_LABEL_PREFIX_ID##8stdiobuf
98#else
99#define stdiobuf_vtable _G_VTABLE_LABEL_PREFIX_ID##stdiobuf
100#endif
101extern struct _IO_jump_t stdiobuf_vtable;
102#endif /* !__GNUC__ */
103#endif /* !stdiobuf_vtable */
104
105#ifdef _IO_MTSAFE_IO
106#define DEF_STDIOFILE(NAME, FD, FILE, FLAGS, CHAIN) \
107  static _IO_lock_t _IO_stdfile_##FD##_lock = _IO_lock_initializer; \
108  struct _IO_fake_stdiobuf NAME = \
109      {{{ _IO_MAGIC+_IO_LINKED+_IO_IS_FILEBUF+_IO_UNBUFFERED+FLAGS, \
110         0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, CHAIN, FD, \
111	 0, 0, 0, 0, { 0 }, &_IO_stdfile_##FD##_lock},\
112         &stdiobuf_vtable}, FILE}
113#else
114#define DEF_STDIOFILE(NAME, FD, FILE, FLAGS, CHAIN) \
115  struct _IO_fake_stdiobuf NAME = \
116      {{{ _IO_MAGIC+_IO_LINKED+_IO_IS_FILEBUF+_IO_UNBUFFERED+FLAGS, \
117	    0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, CHAIN, FD}, \
118         &stdiobuf_vtable}, FILE}
119#endif
120
121DEF_STDIOFILE(_IO_stdin_buf, 0, stdin, _IO_NO_WRITES, &_IO_stderr_.file);
122DEF_STDIOFILE(_IO_stdout_buf, 1, stdout, _IO_NO_READS, &_IO_stdin_buf.s.file);
123DEF_STDIOFILE(_IO_stderr_buf, 2, stderr, _IO_NO_READS, &_IO_stdout_buf.s.file);
124
125_IO_FILE_plus *_IO_list_all
126  = reinterpret_cast<_IO_FILE_plus*>(&_IO_stderr_buf.s);
127#endif  /* !_STDIO_USES_IOSTREAM */
128