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`' SIGNED `signed' `' PTRCONST `void *const' `char *' ANSI_PROTOTYPES 1 not defined CONST is also defined, but is obsolete.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