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Diffstat (limited to 'tools/common.h')
-rw-r--r-- | tools/common.h | 43 |
1 files changed, 43 insertions, 0 deletions
diff --git a/tools/common.h b/tools/common.h new file mode 100644 index 0000000..66ca22e --- /dev/null +++ b/tools/common.h @@ -0,0 +1,43 @@ +/* + * Copyright (C) 2012 Alejandro Mery <amery@geeks.cl> + * + * 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, see <http://www.gnu.org/licenses/>. + */ +#ifndef _SUNXI_TOOLS_COMMON_H +#define _SUNXI_TOOLS_COMMON_H + +#include <stddef.h> /* offsetof */ + +/** flag function argument as unused */ +#ifdef UNUSED +#elif defined(__GNUC__) +# define UNUSED(x) UNUSED_ ## x __attribute__((unused)) +#else +# define UNUSED(x) UNUSED_ ## x +#endif + +/** finds the parent of an struct member */ +#ifndef container_of +#define container_of(P,T,M) (T *)((char *)(P) - offsetof(T, M)) +#endif + +/** calculate number of elements of an array */ +#ifndef ARRAY_SIZE +#define ARRAY_SIZE(A) (sizeof(A)/sizeof((A)[0])) +#endif + +/** shortcut to printf to stderr */ +#define errf(...) fprintf(stderr, __VA_ARGS__) + +#endif /* _SUNXI_TOOLS_COMMON_H */ |