4199f6896a
It seems quite useful to provide this additional information in public exported functions. This is a c99 feature, not supported in C++. Without the check in _sd-common.h: FAILED: test-bus-vtable-cc@exe/src_libsystemd_sd-bus_test-bus-vtable-cc.cc.o ... In file included from ../src/libsystemd/sd-bus/test-bus-vtable-cc.cc:9: In file included from ../src/systemd/sd-bus-vtable.h:26: In file included from ../src/systemd/sd-bus.h:26: ../src/systemd/sd-id128.h:38:47: error: static array size is a C99 feature, not permitted in C++ char *sd_id128_to_string(sd_id128_t id, char s[static SD_ID128_STRING_MAX]); ^ In .c files, I opted to use the define for consistency, even though we don't support compilation with a C++ compiler, so the unconditional keyword would work too.
91 lines
2.8 KiB
C
91 lines
2.8 KiB
C
/* SPDX-License-Identifier: LGPL-2.1+ */
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#ifndef foosdcommonhfoo
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#define foosdcommonhfoo
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/***
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systemd is free software; you can redistribute it and/or modify it
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under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation; either version 2.1 of the License, or
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(at your option) any later version.
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systemd is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with systemd; If not, see <http://www.gnu.org/licenses/>.
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***/
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/* This is a private header; never even think of including this directly! */
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#if defined(__INCLUDE_LEVEL__) && __INCLUDE_LEVEL__ <= 1
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# error "Do not include _sd-common.h directly; it is a private header."
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#endif
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typedef void (*_sd_destroy_t)(void *userdata);
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#ifndef _sd_printf_
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# if __GNUC__ >= 4
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# define _sd_printf_(a,b) __attribute__((__format__(printf, a, b)))
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# else
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# define _sd_printf_(a,b)
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# endif
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#endif
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#ifndef _sd_sentinel_
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# define _sd_sentinel_ __attribute__((__sentinel__))
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#endif
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#ifndef _sd_packed_
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# define _sd_packed_ __attribute__((__packed__))
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#endif
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#ifndef _sd_pure_
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# define _sd_pure_ __attribute__((__pure__))
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#endif
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#ifndef _SD_STRINGIFY
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# define _SD_XSTRINGIFY(x) #x
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# define _SD_STRINGIFY(x) _SD_XSTRINGIFY(x)
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#endif
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#ifndef _SD_BEGIN_DECLARATIONS
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# ifdef __cplusplus
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# define _SD_BEGIN_DECLARATIONS \
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extern "C" { \
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struct _sd_useless_struct_to_allow_trailing_semicolon_
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# else
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# define _SD_BEGIN_DECLARATIONS \
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struct _sd_useless_struct_to_allow_trailing_semicolon_
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# endif
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#endif
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#ifndef _SD_END_DECLARATIONS
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# ifdef __cplusplus
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# define _SD_END_DECLARATIONS \
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} \
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struct _sd_useless_cpp_struct_to_allow_trailing_semicolon_
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# else
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# define _SD_END_DECLARATIONS \
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struct _sd_useless_struct_to_allow_trailing_semicolon_
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# endif
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#endif
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#ifndef _SD_ARRAY_STATIC
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# if __STDC_VERSION__ >= 199901L
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# define _SD_ARRAY_STATIC static
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# else
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# define _SD_ARRAY_STATIC
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# endif
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#endif
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#define _SD_DEFINE_POINTER_CLEANUP_FUNC(type, func) \
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static __inline__ void func##p(type **p) { \
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if (*p) \
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func(*p); \
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} \
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struct _sd_useless_struct_to_allow_trailing_semicolon_
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#endif
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