1/* ANSI and traditional C compatibility macros 2 Copyright 1991, 1992 Free Software Foundation, Inc. 3 This file is part of the GNU C Library. 4 5This program is free software; you can redistribute it and/or modify 6it under the terms of the GNU General Public License as published by 7the Free Software Foundation; either version 2 of the License, or 8(at your option) any later version. 9 10This program 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 program; if not, write to the Free Software 17Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ 18 19/* ANSI and traditional C compatibility macros 20 21 ANSI C is assumed if __STDC__ is #defined. 22 23 Macro ANSI C definition Traditional C definition 24 ----- ---- - ---------- ----------- - ---------- 25 PTR `void *' `char *' 26 LONG_DOUBLE `long double' `double' 27 VOLATILE `volatile' `' 28 SIGNED `signed' `' 29 PTRCONST `void *const' `char *' 30 ANSI_PROTOTYPES 1 not defined 31 32 CONST is also defined, but is obsolete. Just use const. 33 34 DEFUN (name, arglist, args) 35 36 Defines function NAME. 37 38 ARGLIST lists the arguments, separated by commas and enclosed in 39 parentheses. ARGLIST becomes the argument list in traditional C. 40 41 ARGS list the arguments with their types. It becomes a prototype in 42 ANSI C, and the type declarations in traditional C. Arguments should 43 be separated with `AND'. For functions with a variable number of 44 arguments, the last thing listed should be `DOTS'. 45 46 DEFUN_VOID (name) 47 48 Defines a function NAME, which takes no arguments. 49 50 obsolete -- EXFUN (name, (prototype)) -- obsolete. 51 52 Replaced by PARAMS. Do not use; will disappear someday soon. 53 Was used in external function declarations. 54 In ANSI C it is `NAME PROTOTYPE' (so PROTOTYPE should be enclosed in 55 parentheses). In traditional C it is `NAME()'. 56 For a function that takes no arguments, PROTOTYPE should be `(void)'. 57 58 PARAMS ((args)) 59 60 We could use the EXFUN macro to handle prototype declarations, but 61 the name is misleading and the result is ugly. So we just define a 62 simple macro to handle the parameter lists, as in: 63 64 static int foo PARAMS ((int, char)); 65 66 This produces: `static int foo();' or `static int foo (int, char);' 67 68 EXFUN would have done it like this: 69 70 static int EXFUN (foo, (int, char)); 71 72 but the function is not external...and it's hard to visually parse 73 the function name out of the mess. EXFUN should be considered 74 obsolete; new code should be written to use PARAMS. 75 76 For example: 77 extern int printf PARAMS ((CONST char *format DOTS)); 78 int DEFUN(fprintf, (stream, format), 79 FILE *stream AND CONST char *format DOTS) { ... } 80 void DEFUN_VOID(abort) { ... } 81*/ 82 83#ifndef _ANSIDECL_H 84 85#define _ANSIDECL_H 1 86 87 88/* Every source file includes this file, 89 so they will all get the switch for lint. */ 90/* LINTLIBRARY */ 91 92 93#if defined (__STDC__) || defined (_AIX) || (defined (__mips) && defined (_SYSTYPE_SVR4)) || defined(WIN32) 94/* All known AIX compilers implement these things (but don't always 95 define __STDC__). The RISC/OS MIPS compiler defines these things 96 in SVR4 mode, but does not define __STDC__. */ 97 98#define PTR void * 99#define PTRCONST void *CONST 100#define LONG_DOUBLE long double 101 102#define AND , 103#define NOARGS void 104#define CONST const 105#define VOLATILE volatile 106#define SIGNED signed 107#define DOTS , ... 108 109#define EXFUN(name, proto) name proto 110#define DEFUN(name, arglist, args) name(args) 111#define DEFUN_VOID(name) name(void) 112 113#define PROTO(type, name, arglist) type name arglist 114#define PARAMS(paramlist) paramlist 115#define ANSI_PROTOTYPES 1 116 117#else /* Not ANSI C. */ 118 119#define PTR char * 120#define PTRCONST PTR 121#define LONG_DOUBLE double 122 123#define AND ; 124#define NOARGS 125#define CONST 126#ifndef const /* some systems define it in header files for non-ansi mode */ 127#define const 128#endif 129#define VOLATILE 130#define SIGNED 131#define DOTS 132 133#define EXFUN(name, proto) name() 134#define DEFUN(name, arglist, args) name arglist args; 135#define DEFUN_VOID(name) name() 136#define PROTO(type, name, arglist) type name () 137#define PARAMS(paramlist) () 138 139#endif /* ANSI C. */ 140 141#endif /* ansidecl.h */ 142