127 lines
4.2 KiB
C++
127 lines
4.2 KiB
C++
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/*
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Copyright (C) 1994 Free Software Foundation
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This file is part of the GNU IO Library. This library is free
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software; you can redistribute it and/or modify it under the
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terms of the GNU General Public License as published by the
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Free Software Foundation; either version 2, or (at your option)
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any later version.
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This library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU 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 the Free
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Software Foundation, 59 Temple Place - Suite 330, Boston, 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 not cause
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the resulting executable to be covered by the GNU General Public License.
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This exception does not however invalidate any other reasons why
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the executable file might be covered by the GNU General Public License. */
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/* This file provides definitions of _IO_stdin, _IO_stdout, and _IO_stderr
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for C++ code. Compare stdfiles.c.
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(The difference is that here the vtable field is set to
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point to builtinbuf's vtable, so the objects are effectively
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of class builtinbuf.) */
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#include "libioP.h"
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#include <stdio.h>
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#if !defined(filebuf_vtable) && defined(__cplusplus)
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#ifdef __GNUC__
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extern char filebuf_vtable[]
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asm (_G_VTABLE_LABEL_PREFIX
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#if _G_VTABLE_LABEL_HAS_LENGTH
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"7"
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#endif
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"filebuf");
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#else /* !__GNUC__ */
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#if _G_VTABLE_LABEL_HAS_LENGTH
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#define filebuf_vtable _G_VTABLE_LABEL_PREFIX_ID##7filebuf
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#else
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#define filebuf_vtable _G_VTABLE_LABEL_PREFIX_ID##filebuf
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#endif
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extern char filebuf_vtable[];
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#endif /* !__GNUC__ */
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#endif /* !defined(filebuf_vtable) && defined(__cplusplus) */
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#ifndef STD_VTABLE
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#define STD_VTABLE (const struct _IO_jump_t *)filebuf_vtable
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#endif
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#ifdef _IO_MTSAFE_IO
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#define DEF_STDFILE(NAME, FD, CHAIN, FLAGS) \
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static _IO_lock_t _IO_stdfile_##FD##_lock = _IO_lock_initializer; \
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struct _IO_FILE_plus NAME \
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= {FILEBUF_LITERAL(CHAIN, FLAGS, FD), STD_VTABLE}
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#else
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#define DEF_STDFILE(NAME, FD, CHAIN, FLAGS) \
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struct _IO_FILE_plus NAME = {FILEBUF_LITERAL(CHAIN, FLAGS, FD), STD_VTABLE}
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#endif
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DEF_STDFILE(_IO_stdin_, 0, 0, _IO_NO_WRITES);
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DEF_STDFILE(_IO_stdout_, 1, &_IO_stdin_.file, _IO_NO_READS);
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DEF_STDFILE(_IO_stderr_, 2, &_IO_stdout_.file,
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_IO_NO_READS+_IO_UNBUFFERED);
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#ifdef _STDIO_USES_IOSTREAM
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_IO_FILE *_IO_list_all = &_IO_stderr_.file;
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#else /* !_STDIO_USES_IOSTREAM */
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#include "stdiostream.h"
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struct _IO_fake_stdiobuf {
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struct {
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_IO_FILE file;
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const void *vtable;
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} s;
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FILE *stdio_file;
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};
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/* Define stdiobuf_vtable as a name for the virtual function table
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of the stdiobuf class. */
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#ifndef stdiobuf_vtable
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#ifdef __GNUC__
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extern struct _IO_jump_t stdiobuf_vtable
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asm (_G_VTABLE_LABEL_PREFIX
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#if _G_VTABLE_LABEL_HAS_LENGTH
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"8"
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#endif
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"stdiobuf");
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#else /* !__GNUC__ */
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#if _G_VTABLE_LABEL_HAS_LENGTH
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#define stdiobuf_vtable _G_VTABLE_LABEL_PREFIX_ID##8stdiobuf
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#else
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#define stdiobuf_vtable _G_VTABLE_LABEL_PREFIX_ID##stdiobuf
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#endif
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extern struct _IO_jump_t stdiobuf_vtable;
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#endif /* !__GNUC__ */
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#endif /* !stdiobuf_vtable */
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#ifdef _IO_MTSAFE_IO
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#define DEF_STDIOFILE(NAME, FD, FILE, FLAGS, CHAIN) \
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static _IO_lock_t _IO_stdfile_##FD##_lock = _IO_lock_initializer; \
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struct _IO_fake_stdiobuf NAME = \
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{{{ _IO_MAGIC+_IO_LINKED+_IO_IS_FILEBUF+_IO_UNBUFFERED+FLAGS, \
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, CHAIN, FD, \
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0, 0, 0, 0, { 0 }, _IO_stdfile_##FD##_lock},\
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&stdiobuf_vtable}, FILE}
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#else
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#define DEF_STDIOFILE(NAME, FD, FILE, FLAGS, CHAIN) \
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struct _IO_fake_stdiobuf NAME = \
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{{{ _IO_MAGIC+_IO_LINKED+_IO_IS_FILEBUF+_IO_UNBUFFERED+FLAGS, \
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, CHAIN, FD}, \
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&stdiobuf_vtable}, FILE}
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#endif
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DEF_STDIOFILE(_IO_stdin_buf, 0, stdin, _IO_NO_WRITES, &_IO_stderr_.file);
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DEF_STDIOFILE(_IO_stdout_buf, 1, stdout, _IO_NO_READS, &_IO_stdin_buf.s.file);
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DEF_STDIOFILE(_IO_stderr_buf, 2, stderr, _IO_NO_READS, &_IO_stdout_buf.s.file);
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_IO_FILE *_IO_list_all = &_IO_stderr_buf.s.file;
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#endif /* !_STDIO_USES_IOSTREAM */
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