1 /* 2 Copyright (C) 1994 Free Software Foundation 3 4 This file is part of the GNU IO Library. This library is free 5 software; you can redistribute it and/or modify it under the 6 terms of the GNU General Public License as published by the 7 Free Software Foundation; either version 2, or (at your option) 8 any later version. 9 10 This library is distributed in the hope that it will be useful, 11 but WITHOUT ANY WARRANTY; without even the implied warranty of 12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 13 GNU General Public License for more details. 14 15 You should have received a copy of the GNU General Public License 16 along with this library; see the file COPYING. If not, write to the Free 17 Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. 18 19 As a special exception, if you link this library with files 20 compiled with a GNU compiler to produce an executable, this does not cause 21 the resulting executable to be covered by the GNU General Public License. 22 This exception does not however invalidate any other reasons why 23 the 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__ 37 extern 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 49 extern 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 68 DEF_STDFILE(_IO_stdin_, 0, 0, _IO_NO_WRITES); 69 DEF_STDFILE(_IO_stdout_, 1, &_IO_stdin_.file, _IO_NO_READS); 70 DEF_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 77 struct _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__ 89 extern 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 101 extern 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 120 121 DEF_STDIOFILE(_IO_stdin_buf, 0, stdin, _IO_NO_WRITES, &_IO_stderr_.file); 122 DEF_STDIOFILE(_IO_stdout_buf, 1, stdout, _IO_NO_READS, &_IO_stdin_buf.s.file); 123 DEF_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