44 lines
1.3 KiB
C
44 lines
1.3 KiB
C
/*
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* Copyright (C) 2012 Alejandro Mery <amery@geeks.cl>
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef _SUNXI_TOOLS_COMMON_H
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#define _SUNXI_TOOLS_COMMON_H
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#include <stddef.h> /* offsetof */
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/** flag function argument as unused */
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#ifdef UNUSED
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#elif defined(__GNUC__)
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# define UNUSED(x) UNUSED_ ## x __attribute__((unused))
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#else
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# define UNUSED(x) UNUSED_ ## x
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#endif
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/** finds the parent of an struct member */
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#ifndef container_of
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#define container_of(P,T,M) (T *)((char *)(P) - offsetof(T, M))
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#endif
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/** calculate number of elements of an array */
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#ifndef ARRAY_SIZE
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#define ARRAY_SIZE(A) (sizeof(A)/sizeof((A)[0]))
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#endif
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/** shortcut to printf to stderr */
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#define errf(...) fprintf(stderr, __VA_ARGS__)
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#endif /* _SUNXI_TOOLS_COMMON_H */
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