1/* SPDX-License-Identifier: GPL-2.0-or-later */ 2/* ANSI and traditional C compatibility macros 3 Copyright 1991, 1992 Free Software Foundation, Inc. 4 This file is part of the GNU C Library. 5 6 */ 7 8/* ANSI and traditional C compatibility macros 9 10 ANSI C is assumed if __STDC__ is #defined. 11 12 Macro ANSI C definition Traditional C definition 13 ----- ---- - ---------- ----------- - ---------- 14 PTR `void *' `char *' 15 LONG_DOUBLE `long double' `double' 16 VOLATILE `volatile' `' 17 SIGNED `signed' `' 18 PTRCONST `void *const' `char *' 19 ANSI_PROTOTYPES 1 not defined 20 21 CONST is also defined, but is obsolete. Just use const. 22 23 DEFUN (name, arglist, args) 24 25 Defines function NAME. 26 27 ARGLIST lists the arguments, separated by commas and enclosed in 28 parentheses. ARGLIST becomes the argument list in traditional C. 29 30 ARGS list the arguments with their types. It becomes a prototype in 31 ANSI C, and the type declarations in traditional C. Arguments should 32 be separated with `AND'. For functions with a variable number of 33 arguments, the last thing listed should be `DOTS'. 34 35 DEFUN_VOID (name) 36 37 Defines a function NAME, which takes no arguments. 38 39 obsolete -- EXFUN (name, (prototype)) -- obsolete. 40 41 Replaced by PARAMS. Do not use; will disappear someday soon. 42 Was used in external function declarations. 43 In ANSI C it is `NAME PROTOTYPE' (so PROTOTYPE should be enclosed in 44 parentheses). In traditional C it is `NAME()'. 45 For a function that takes no arguments, PROTOTYPE should be `(void)'. 46 47 PARAMS ((args)) 48 49 We could use the EXFUN macro to handle prototype declarations, but 50 the name is misleading and the result is ugly. So we just define a 51 simple macro to handle the parameter lists, as in: 52 53 static int foo PARAMS ((int, char)); 54 55 This produces: `static int foo();' or `static int foo (int, char);' 56 57 EXFUN would have done it like this: 58 59 static int EXFUN (foo, (int, char)); 60 61 but the function is not external...and it's hard to visually parse 62 the function name out of the mess. EXFUN should be considered 63 obsolete; new code should be written to use PARAMS. 64 65 For example: 66 extern int printf PARAMS ((CONST char *format DOTS)); 67 int DEFUN(fprintf, (stream, format), 68 FILE *stream AND CONST char *format DOTS) { ... } 69 void DEFUN_VOID(abort) { ... } 70*/ 71 72#ifndef _ANSIDECL_H 73 74#define _ANSIDECL_H 1 75 76 77/* Every source file includes this file, 78 so they will all get the switch for lint. */ 79/* LINTLIBRARY */ 80 81 82#if defined (__STDC__) || defined (_AIX) || (defined (__mips) && defined (_SYSTYPE_SVR4)) || defined(WIN32) 83/* All known AIX compilers implement these things (but don't always 84 define __STDC__). The RISC/OS MIPS compiler defines these things 85 in SVR4 mode, but does not define __STDC__. */ 86 87#define PTR void * 88#define PTRCONST void *CONST 89#define LONG_DOUBLE long double 90 91#define AND , 92#define NOARGS void 93#define CONST const 94#define VOLATILE volatile 95#define SIGNED signed 96#define DOTS , ... 97 98#define EXFUN(name, proto) name proto 99#define DEFUN(name, arglist, args) name(args) 100#define DEFUN_VOID(name) name(void) 101 102#define PROTO(type, name, arglist) type name arglist 103#define PARAMS(paramlist) paramlist 104#define ANSI_PROTOTYPES 1 105 106#else /* Not ANSI C. */ 107 108#define PTR char * 109#define PTRCONST PTR 110#define LONG_DOUBLE double 111 112#define AND ; 113#define NOARGS 114#define CONST 115#ifndef const /* some systems define it in header files for non-ansi mode */ 116#define const 117#endif 118#define VOLATILE 119#define SIGNED 120#define DOTS 121 122#define EXFUN(name, proto) name() 123#define DEFUN(name, arglist, args) name arglist args; 124#define DEFUN_VOID(name) name() 125#define PROTO(type, name, arglist) type name () 126#define PARAMS(paramlist) () 127 128#endif /* ANSI C. */ 129 130#endif /* ansidecl.h */ 131