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Diffstat (limited to 'libio/stdstrbufs.cc')
| -rw-r--r-- | libio/stdstrbufs.cc | 115 |
1 files changed, 115 insertions, 0 deletions
diff --git a/libio/stdstrbufs.cc b/libio/stdstrbufs.cc new file mode 100644 index 00000000000..8af259988a5 --- /dev/null +++ b/libio/stdstrbufs.cc @@ -0,0 +1,115 @@ +/* +Copyright (C) 1994 Free Software Foundation + +This file is part of the GNU IO Library. This library is free +software; you can redistribute it and/or modify it under the +terms of the GNU General Public License as published by the +Free Software Foundation; either version 2, or (at your option) +any later version. + +This 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 General Public License for more details. + +You should have received a copy of the GNU General Public License +along with this library; see the file COPYING. If not, write to the Free +Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. + +As a special exception, if you link this library with files +compiled with a GNU compiler to produce an executable, this does not cause +the resulting executable to be covered by the GNU General Public License. +This exception does not however invalidate any other reasons why +the executable file might be covered by the GNU General Public License. */ + + +/* This file provides definitions of _IO_stdin, _IO_stdout, and _IO_stderr + for C++ code. Compare stdfiles.c. + (The difference is that here the vtable field is set to + point to builtinbuf's vtable, so the objects are effectively + of class builtinbuf.) */ + +#include "libioP.h" +#include <stdio.h> + +#if !defined(filebuf_vtable) && defined(__cplusplus) +#ifdef __GNUC__ +extern char filebuf_vtable[] + asm (_G_VTABLE_LABEL_PREFIX +#if _G_VTABLE_LABEL_HAS_LENGTH + "7" +#endif + "filebuf"); +#else /* !__GNUC__ */ +#if _G_VTABLE_LABEL_HAS_LENGTH +#define filebuf_vtable _G_VTABLE_LABEL_PREFIX_ID##7filebuf +#else +#define filebuf_vtable _G_VTABLE_LABEL_PREFIX_ID##filebuf +#endif +extern char filebuf_vtable[]; +#endif /* !__GNUC__ */ +#endif /* !defined(filebuf_vtable) && defined(__cplusplus) */ + +#ifndef STD_VTABLE +#define STD_VTABLE (const struct _IO_jump_t *)filebuf_vtable +#endif + +#define DEF_STDFILE(NAME, FD, CHAIN, FLAGS) \ + struct _IO_FILE_plus NAME = {FILEBUF_LITERAL(CHAIN, FLAGS, FD), STD_VTABLE} + +DEF_STDFILE(_IO_stdin_, 0, 0, _IO_NO_WRITES); +DEF_STDFILE(_IO_stdout_, 1, &_IO_stdin_.file, _IO_NO_READS); +DEF_STDFILE(_IO_stderr_, 2, &_IO_stdout_.file, + _IO_NO_READS+_IO_UNBUFFERED); + +#ifdef _STDIO_USES_IOSTREAM +_IO_FILE *_IO_list_all = &_IO_stderr_.file; +#else /* !_STDIO_USES_IOSTREAM */ +#include "stdiostream.h" + +struct _IO_fake_stdiobuf { + struct { + _IO_FILE file; + const void *vtable; + } s; + FILE *stdio_file; +}; + +/* Define stdiobuf_vtable as a name for the virtual function table + of the stdiobuf class. */ +#ifndef stdiobuf_vtable +#ifdef __GNUC__ +extern struct _IO_jump_t stdiobuf_vtable + asm (_G_VTABLE_LABEL_PREFIX +#if _G_VTABLE_LABEL_HAS_LENGTH + "8" +#endif + "stdiobuf"); +#else /* !__GNUC__ */ +#if _G_VTABLE_LABEL_HAS_LENGTH +#define stdiobuf_vtable _G_VTABLE_LABEL_PREFIX_ID##8stdiobuf +#else +#define stdiobuf_vtable _G_VTABLE_LABEL_PREFIX_ID##stdiobuf +#endif +extern struct _IO_jump_t stdiobuf_vtable; +#endif /* !__GNUC__ */ +#endif /* !stdiobuf_vtable */ + +#if _IO_UNIFIED_JUMPTABLES +#define JUMP_PTR /* Nothing */ +#else +#define JUMP_PTR &_IO_streambuf_jumps, +#endif + +#define DEF_STDIOFILE(NAME, FD, FILE, FLAGS, CHAIN) \ + struct _IO_fake_stdiobuf NAME = \ + {{{ _IO_MAGIC+_IO_LINKED+_IO_IS_FILEBUF+_IO_UNBUFFERED+FLAGS, \ + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, CHAIN, JUMP_PTR FD},\ + &stdiobuf_vtable}, FILE} + +DEF_STDIOFILE(_IO_stdin_buf, 0, stdin, _IO_NO_WRITES, &_IO_stderr_.file); +DEF_STDIOFILE(_IO_stdout_buf, 1, stdout, _IO_NO_READS, &_IO_stdin_buf.s.file); +DEF_STDIOFILE(_IO_stderr_buf, 2, stderr, _IO_NO_READS, &_IO_stdout_buf.s.file); + +_IO_FILE *_IO_list_all = &_IO_stderr_buf.s.file; +#endif /* !_STDIO_USES_IOSTREAM */ |