diff options
Diffstat (limited to 'lib/unistring/cdefs.h')
| -rw-r--r-- | lib/unistring/cdefs.h | 115 |
1 files changed, 95 insertions, 20 deletions
diff --git a/lib/unistring/cdefs.h b/lib/unistring/cdefs.h index e186b3a..3faf5ba 100644 --- a/lib/unistring/cdefs.h +++ b/lib/unistring/cdefs.h @@ -1,15 +1,24 @@ /* Common macro definitions for C include files. - Copyright (C) 2008-2020 Free Software Foundation, Inc. + Copyright (C) 2008-2021 Free Software Foundation, Inc. - This program is free software: you can redistribute it and/or modify it - under the terms of the GNU Lesser General Public License as published - by the Free Software Foundation; either version 3 of the License, or - (at your option) any later version. + This program is free software: you can redistribute it and/or + modify it under the terms of either: + * the GNU Lesser General Public License as published by the Free + Software Foundation; either version 3 of the License, or (at your + option) any later version. + + or + + * 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. + + or both in parallel, as here. 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 - Lesser General Public License for more details. + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU Lesser General Public License for more details. You should have received a copy of the GNU Lesser General Public License along with this program. If not, see <https://www.gnu.org/licenses/>. */ @@ -17,25 +26,91 @@ #ifndef _UNISTRING_CDEFS_H #define _UNISTRING_CDEFS_H -/* _GL_UNUSED_PARAMETER is a marker that can be appended to function parameter +/* _GL_UNUSED_PARAMETER is a marker that can be prepended to function parameter declarations for parameters that are not used. This helps to reduce warnings, such as from GCC -Wunused-parameter. The syntax is as follows: - type param _GL_UNUSED_PARAMETER + _GL_UNUSED_PARAMETER type param or more generally - param_decl _GL_UNUSED_PARAMETER + _GL_UNUSED_PARAMETER param_decl For example: - int param _GL_UNUSED_PARAMETER - int *(*param)(void) _GL_UNUSED_PARAMETER - Other possible, but obscure and discouraged syntaxes: - int _GL_UNUSED_PARAMETER *(*param)(void) - _GL_UNUSED_PARAMETER int *(*param)(void) + _GL_UNUSED_PARAMETER int param + _GL_UNUSED_PARAMETER int *(*param) (void) */ #ifndef _GL_UNUSED_PARAMETER -# if __GNUC__ >= 3 || (__GNUC__ == 2 && __GNUC_MINOR__ >= 7) -# define _GL_UNUSED_PARAMETER __attribute__ ((__unused__)) -# else -# define _GL_UNUSED_PARAMETER -# endif +# define _GL_UNUSED_PARAMETER _UC_ATTRIBUTE_MAYBE_UNUSED +#endif +/* _GL_ATTRIBUTE_MAYBE_UNUSED likewise. */ +#ifndef _GL_ATTRIBUTE_MAYBE_UNUSED +# define _GL_ATTRIBUTE_MAYBE_UNUSED _UC_ATTRIBUTE_MAYBE_UNUSED +#endif + +#ifndef _GL_ATTRIBUTE_MALLOC +# define _GL_ATTRIBUTE_MALLOC _UC_ATTRIBUTE_MALLOC +#endif + +/* _GL_ATTRIBUTE_DEALLOC (F, I) is for functions returning pointers + that can be freed by passing them as the Ith argument to the + function F. _UC_ATTRIBUTE_DEALLOC_FREE is for functions that + return pointers that can be freed via 'free'; it can be used + only after including stdlib.h. These macros cannot be used on + inline functions. */ +#ifndef _GL_ATTRIBUTE_DEALLOC +# define _GL_ATTRIBUTE_DEALLOC _UC_ATTRIBUTE_DEALLOC +#endif +#ifndef _GL_ATTRIBUTE_DEALLOC_FREE +# define _GL_ATTRIBUTE_DEALLOC_FREE _UC_ATTRIBUTE_DEALLOC_FREE +#endif + +/* The definitions below are taken from gnulib/m4/gnulib-common.m4, + with prefix _UC instead of prefix _GL. */ + +/* True if the compiler says it groks GNU C version MAJOR.MINOR. */ +#if defined __GNUC__ && defined __GNUC_MINOR__ +# define _UC_GNUC_PREREQ(major, minor) \ + ((major) < __GNUC__ + ((minor) <= __GNUC_MINOR__)) +#else +# define _UC_GNUC_PREREQ(major, minor) 0 +#endif + +#if (defined __has_attribute \ + && (!defined __clang_minor__ \ + || 3 < __clang_major__ + (5 <= __clang_minor__))) +# define _UC_HAS_ATTRIBUTE(attr) __has_attribute (__##attr##__) +#else +# define _UC_HAS_ATTRIBUTE(attr) _UC_ATTR_##attr +# define _UC_ATTR_malloc _UC_GNUC_PREREQ (3, 0) +# define _UC_ATTR_unused _UC_GNUC_PREREQ (2, 7) +#endif + +#ifdef __has_c_attribute +# define _UC_HAS_C_ATTRIBUTE(attr) __has_c_attribute (__##attr##__) +#else +# define _UC_HAS_C_ATTRIBUTE(attr) 0 +#endif + +#if _UC_GNUC_PREREQ (11, 0) +# define _UC_ATTRIBUTE_DEALLOC(f, i) __attribute__ ((__malloc__ (f, i))) +#else +# define _UC_ATTRIBUTE_DEALLOC(f, i) +#endif +#define _UC_ATTRIBUTE_DEALLOC_FREE _UC_ATTRIBUTE_DEALLOC (free, 1) + +#if _UC_HAS_ATTRIBUTE (malloc) +# define _UC_ATTRIBUTE_MALLOC __attribute__ ((__malloc__)) +#else +# define _UC_ATTRIBUTE_MALLOC +#endif + +#if _UC_HAS_C_ATTRIBUTE (maybe_unused) +# define _UC_ATTRIBUTE_MAYBE_UNUSED [[__maybe_unused__]] +#else +# define _UC_ATTRIBUTE_MAYBE_UNUSED _UC_ATTRIBUTE_UNUSED +#endif + +#if _UC_HAS_ATTRIBUTE (unused) +# define _UC_ATTRIBUTE_UNUSED __attribute__ ((__unused__)) +#else +# define _UC_ATTRIBUTE_UNUSED #endif #endif /* _UNISTRING_CDEFS_H */ |