| 1 | /* ANSI and traditional C compatability macros |
| 2 | Copyright 1991, 1992, 1996, 1999 Free Software Foundation, Inc. |
| 3 | This file is part of the GNU C Library. |
| 4 | |
| 5 | This program is free software; you can redistribute it and/or modify |
| 6 | it under the terms of the GNU General Public License as published by |
| 7 | the Free Software Foundation; either version 2 of the License, or |
| 8 | (at your option) any later version. |
| 9 | |
| 10 | This program 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 program; if not, write to the Free Software |
| 17 | Foundation, 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| 32 | CONST is also defined, but is obsolete.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 | obsolete -- 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 | obsolete -- 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 | obsolete -- PROTO (type, name, (prototype) -- obsolete. |
| 59 | |
| 60 | This one has also been replaced by PARAMS. Do not use. |
| 61 | |
| 62 | PARAMS ((args)) |
| 63 | |
| 64 | We could use the EXFUN macro to handle prototype declarations, but |
| 65 | the name is misleading and the result is ugly. So we just define a |
| 66 | simple macro to handle the parameter lists, as in: |
| 67 | |
| 68 | static int foo PARAMS ((int, char)); |
| 69 | |
| 70 | This produces: `static int foo();' or `static int foo (int, char);' |
| 71 | |
| 72 | EXFUN would have done it like this: |
| 73 | |
| 74 | static int EXFUN (foo, (int, char)); |
| 75 | |
| 76 | but the function is not external...and it's hard to visually parse |
| 77 | the function name out of the mess. EXFUN should be considered |
| 78 | obsolete; new code should be written to use PARAMS. |
| 79 | |
| 80 | DOTS is also obsolete. |
| 81 | |
| 82 | Examples: |
| 83 | |
| 84 | extern int printf PARAMS ((const char *format, ...)); |
| 85 | */ |
| 86 | |
| 87 | #ifndef _ANSIDECL_H |
| 88 | |
| 89 | #define _ANSIDECL_H 1 |
| 90 | |
| 91 | |
| 92 | /* Every source file includes this file, |
| 93 | so they will all get the switch for lint. */ |
| 94 | /* LINTLIBRARY */ |
| 95 | |
| 96 | |
| 97 | #if defined (__STDC__) || defined (_AIX) || (defined (__mips) && defined (_SYSTYPE_SVR4)) || defined(_WIN32) |
| 98 | /* All known AIX compilers implement these things (but don't always |
| 99 | define __STDC__). The RISC/OS MIPS compiler defines these things |
| 100 | in SVR4 mode, but does not define __STDC__. */ |
| 101 | |
| 102 | #define PTR void * |
| 103 | #define PTRCONST void *CONST |
| 104 | #define LONG_DOUBLE long double |
| 105 | |
| 106 | #ifndef IN_GCC |
| 107 | #define AND , |
| 108 | #define NOARGS void |
| 109 | #define VOLATILE volatile |
| 110 | #define SIGNED signed |
| 111 | #endif /* ! IN_GCC */ |
| 112 | |
| 113 | #define PARAMS(paramlist) paramlist |
| 114 | #define ANSI_PROTOTYPES 1 |
| 115 | |
| 116 | #define VPARAMS(ARGS) ARGS |
| 117 | #define VA_START(va_list,var) va_start(va_list,var) |
| 118 | |
| 119 | /* These are obsolete. Do not use. */ |
| 120 | #ifndef IN_GCC |
| 121 | #define CONST const |
| 122 | #define DOTS , ... |
| 123 | #define PROTO(type, name, arglist) type name arglist |
| 124 | #define EXFUN(name, proto) name proto |
| 125 | #define DEFUN(name, arglist, args) name(args) |
| 126 | #define DEFUN_VOID(name) name(void) |
| 127 | #endif /* ! IN_GCC */ |
| 128 | |
| 129 | #else /* Not ANSI C. */ |
| 130 | |
| 131 | #define PTR char * |
| 132 | #define PTRCONST PTR |
| 133 | #define LONG_DOUBLE double |
| 134 | |
| 135 | #ifndef IN_GCC |
| 136 | #define AND ; |
| 137 | #define NOARGS |
| 138 | #define VOLATILE |
| 139 | #define SIGNED |
| 140 | #endif /* !IN_GCC */ |
| 141 | |
| 142 | #ifndef const /* some systems define it in header files for non-ansi mode */ |
| 143 | #define const |
| 144 | #endif |
| 145 | |
| 146 | #define PARAMS(paramlist) () |
| 147 | |
| 148 | #define VPARAMS(ARGS) (va_alist) va_dcl |
| 149 | #define VA_START(va_list,var) va_start(va_list) |
| 150 | |
| 151 | /* These are obsolete. Do not use. */ |
| 152 | #ifndef IN_GCC |
| 153 | #define CONST |
| 154 | #define DOTS |
| 155 | #define PROTO(type, name, arglist) type name () |
| 156 | #define EXFUN(name, proto) name() |
| 157 | #define DEFUN(name, arglist, args) name arglist args; |
| 158 | #define DEFUN_VOID(name) name() |
| 159 | #endif /* ! IN_GCC */ |
| 160 | |
| 161 | #endif /* ANSI C. */ |
| 162 | |
| 163 | /* Define macros for some gcc attributes. This permits us to use the |
| 164 | macros freely, and know that they will come into play for the |
| 165 | version of gcc in which they are supported. */ |
| 166 | |
| 167 | #if __GNUC__ < 2 || (__GNUC__ == 2 && __GNUC_MINOR__ < 7) |
| 168 | # define __attribute__(x) |
| 169 | #endif |
| 170 | |
| 171 | #ifndef ATTRIBUTE_UNUSED_LABEL |
| 172 | # if __GNUC__ < 2 || (__GNUC__ == 2 && __GNUC_MINOR__ < 93) |
| 173 | # define ATTRIBUTE_UNUSED_LABEL |
| 174 | # else |
| 175 | # define ATTRIBUTE_UNUSED_LABEL ATTRIBUTE_UNUSED |
| 176 | # endif /* GNUC < 2.93 */ |
| 177 | #endif /* ATTRIBUTE_UNUSED_LABEL */ |
| 178 | |
| 179 | #ifndef ATTRIBUTE_UNUSED |
| 180 | #define ATTRIBUTE_UNUSED __attribute__ ((__unused__)) |
| 181 | #endif /* ATTRIBUTE_UNUSED */ |
| 182 | |
| 183 | #ifndef ATTRIBUTE_NORETURN |
| 184 | #define ATTRIBUTE_NORETURN __attribute__ ((__noreturn__)) |
| 185 | #endif /* ATTRIBUTE_NORETURN */ |
| 186 | |
| 187 | #ifndef ATTRIBUTE_PRINTF |
| 188 | #define ATTRIBUTE_PRINTF(m, n) __attribute__ ((format (__printf__, m, n))) |
| 189 | #define ATTRIBUTE_PRINTF_1 ATTRIBUTE_PRINTF(1, 2) |
| 190 | #define ATTRIBUTE_PRINTF_2 ATTRIBUTE_PRINTF(2, 3) |
| 191 | #define ATTRIBUTE_PRINTF_3 ATTRIBUTE_PRINTF(3, 4) |
| 192 | #define ATTRIBUTE_PRINTF_4 ATTRIBUTE_PRINTF(4, 5) |
| 193 | #define ATTRIBUTE_PRINTF_5 ATTRIBUTE_PRINTF(5, 6) |
| 194 | #endif /* ATTRIBUTE_PRINTF */ |
| 195 | |
| 196 | #endif /* ansidecl.h */ |