| 0,0 → 1,251 |
|---|
| /* ANSI and traditional C compatability macros |
| Copyright 1991, 1992, 1993, 1994, 1995, 1996, 1998, 1999, 2000 |
| Free Software Foundation, Inc. |
| This file is part of the GNU C Library. |
| |
| This program is free software; you can redistribute it and/or modify |
| it under the terms of the GNU General Public License as published by |
| the Free Software Foundation; either version 2 of the License, or |
| (at your option) any later version. |
| |
| This program is distributed in the hope that it will be useful, |
| but WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| GNU General Public License for more details. |
| |
| You should have received a copy of the GNU General Public License |
| along with this program; if not, write to the Free Software |
| Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ |
| |
| /* 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| CONST is also defined, but is obsolete.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. |
| |
| obsolete -- 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'. |
| |
| obsolete -- 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)'. |
| |
| obsolete -- PROTO (type, name, (prototype) -- obsolete. |
| |
| This one has also been replaced by PARAMS. Do not use. |
| |
| 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. |
| |
| DOTS is also obsolete. |
| |
| Examples: |
| |
| extern int printf PARAMS ((const char *format, ...)); |
| */ |
| |
| #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 |
| |
| #ifndef IN_GCC |
| #define AND , |
| #define NOARGS void |
| #define VOLATILE volatile |
| #define SIGNED signed |
| #endif /* ! IN_GCC */ |
| |
| #define PARAMS(paramlist) paramlist |
| #define ANSI_PROTOTYPES 1 |
| |
| #define VPARAMS(ARGS) ARGS |
| #define VA_START(va_list,var) va_start(va_list,var) |
| |
| /* These are obsolete. Do not use. */ |
| #ifndef IN_GCC |
| #define CONST const |
| #define DOTS , ... |
| #define PROTO(type, name, arglist) type name arglist |
| #define EXFUN(name, proto) name proto |
| #define DEFUN(name, arglist, args) name(args) |
| #define DEFUN_VOID(name) name(void) |
| #endif /* ! IN_GCC */ |
| |
| #else /* Not ANSI C. */ |
| |
| #define PTR char * |
| #define PTRCONST PTR |
| #define LONG_DOUBLE double |
| |
| #ifndef IN_GCC |
| #define AND ; |
| #define NOARGS |
| #define VOLATILE |
| #define SIGNED |
| #endif /* !IN_GCC */ |
| |
| #ifndef const /* some systems define it in header files for non-ansi mode */ |
| #define const |
| #endif |
| |
| #define PARAMS(paramlist) () |
| |
| #define VPARAMS(ARGS) (va_alist) va_dcl |
| #define VA_START(va_list,var) va_start(va_list) |
| |
| /* These are obsolete. Do not use. */ |
| #ifndef IN_GCC |
| #define CONST |
| #define DOTS |
| #define PROTO(type, name, arglist) type name () |
| #define EXFUN(name, proto) name() |
| #define DEFUN(name, arglist, args) name arglist args; |
| #define DEFUN_VOID(name) name() |
| #endif /* ! IN_GCC */ |
| |
| #endif /* ANSI C. */ |
| |
| /* Using MACRO(x,y) in cpp #if conditionals does not work with some |
| older preprocessors. Thus we can't define something like this: |
| |
| #define HAVE_GCC_VERSION(MAJOR, MINOR) \ |
| (__GNUC__ > (MAJOR) || (__GNUC__ == (MAJOR) && __GNUC_MINOR__ >= (MINOR))) |
| |
| and then test "#if HAVE_GCC_VERSION(2,7)". |
| |
| So instead we use the macro below and test it against specific values. */ |
| |
| /* This macro simplifies testing whether we are using gcc, and if it |
| is of a particular minimum version. (Both major & minor numbers are |
| significant.) This macro will evaluate to 0 if we are not using |
| gcc at all. */ |
| #ifndef GCC_VERSION |
| #define GCC_VERSION (__GNUC__ * 1000 + __GNUC_MINOR__) |
| #endif /* GCC_VERSION */ |
| |
| /* Define macros for some gcc attributes. This permits us to use the |
| macros freely, and know that they will come into play for the |
| version of gcc in which they are supported. */ |
| |
| #if (GCC_VERSION < 2007) |
| # define __attribute__(x) |
| #endif |
| |
| /* Attribute __malloc__ on functions was valid as of gcc 2.96. */ |
| #ifndef ATTRIBUTE_MALLOC |
| # if (GCC_VERSION >= 2096) |
| # define ATTRIBUTE_MALLOC __attribute__ ((__malloc__)) |
| # else |
| # define ATTRIBUTE_MALLOC |
| # endif /* GNUC >= 2.96 */ |
| #endif /* ATTRIBUTE_MALLOC */ |
| |
| /* Attributes on labels were valid as of gcc 2.93. */ |
| #ifndef ATTRIBUTE_UNUSED_LABEL |
| # if (GCC_VERSION >= 2093) |
| # define ATTRIBUTE_UNUSED_LABEL ATTRIBUTE_UNUSED |
| # else |
| # define ATTRIBUTE_UNUSED_LABEL |
| # endif /* GNUC >= 2.93 */ |
| #endif /* ATTRIBUTE_UNUSED_LABEL */ |
| |
| #ifndef ATTRIBUTE_UNUSED |
| #define ATTRIBUTE_UNUSED __attribute__ ((__unused__)) |
| #endif /* ATTRIBUTE_UNUSED */ |
| |
| #ifndef ATTRIBUTE_NORETURN |
| #define ATTRIBUTE_NORETURN __attribute__ ((__noreturn__)) |
| #endif /* ATTRIBUTE_NORETURN */ |
| |
| #ifndef ATTRIBUTE_PRINTF |
| #define ATTRIBUTE_PRINTF(m, n) __attribute__ ((__format__ (__printf__, m, n))) |
| #define ATTRIBUTE_PRINTF_1 ATTRIBUTE_PRINTF(1, 2) |
| #define ATTRIBUTE_PRINTF_2 ATTRIBUTE_PRINTF(2, 3) |
| #define ATTRIBUTE_PRINTF_3 ATTRIBUTE_PRINTF(3, 4) |
| #define ATTRIBUTE_PRINTF_4 ATTRIBUTE_PRINTF(4, 5) |
| #define ATTRIBUTE_PRINTF_5 ATTRIBUTE_PRINTF(5, 6) |
| #endif /* ATTRIBUTE_PRINTF */ |
| |
| /* We use __extension__ in some places to suppress -pedantic warnings |
| about GCC extensions. This feature didn't work properly before |
| gcc 2.8. */ |
| #if GCC_VERSION < 2008 |
| #define __extension__ |
| #endif |
| |
| /* Bootstrap support: Autoconf will possibly define the `inline' or |
| `const' keywords as macros, however this is only valid for the |
| stage1 compiler. If we detect a modern version of gcc, |
| unconditionally reset the values. This makes sure the right thing |
| happens in stage2 and later. We need to do this very early; |
| i.e. before any header files that might use these keywords. |
| Otherwise conflicts might occur. */ |
| |
| #if (GCC_VERSION >= 2007) |
| # ifdef __STDC__ |
| # undef const |
| # endif |
| # undef inline |
| # define inline __inline__ /* __inline__ prevents -pedantic warnings */ |
| # ifndef HAVE_LONG_DOUBLE |
| # define HAVE_LONG_DOUBLE 1 |
| # endif |
| #endif /* GCC >= 2.7 */ |
| |
| #endif /* ansidecl.h */ |