#ifndef APOS_BITS_H #define APOS_BITS_H /** * @file bits.h * Bit manipulations. */ #include #include #define is_set(x, y) ((x) & (y)) #define set_bit(x, y) ((x) |= (y)) #define clear_bit(x, y) ((x) &= ~(y)) #define is_nset(x, y) (is_set((x), 1UL << (y))) #define set_nbit(x, y) (set_bit((x), 1UL << (y))) #define clear_nbit(x, y) (clear_bit((x), 1UL << (y))) static inline bool bitmap_is_set(void *bmap, size_t n) { uint8_t *bitmap = bmap; size_t i = n / 8; size_t r = n - (i * 8); return is_nset(bitmap[i], r); } static inline void bitmap_set(void *bmap, size_t n) { uint8_t *bitmap = bmap; size_t i = n / 8; size_t r = n - (i * 8); set_nbit(bitmap[i], r); } static inline void bitmap_clear(void *bmap, size_t n) { uint8_t *bitmap = bmap; size_t i = n / 8; size_t r = n - (i * 8); clear_nbit(bitmap[i], r); } uint16_t __bswap16(uint16_t u); uint32_t __bswap32(uint32_t u); uint64_t __bswap64(uint64_t u); #if __has_builtin(__builtin_bswap16) #define __bswap16(x) __builtin_bswap16(x) #endif #if __has_builtin(__builtin_bswap32) #define __bswap32(x) __builtin_bswap32(x) #endif #if __has_builtin(__builtin_bswap64) #define __bswap64(x) __builtin_bswap64(x) #endif #if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__ #define be16_to_cpu(x) __bswap16(x) #define be32_to_cpu(x) __bswap32(x) #define be64_to_cpu(x) __bswap64(x) #define cpu_to_be16(x) __bswap16(x) #define cpu_to_be32(x) __bswap32(x) #define cpu_to_be64(x) __bswap64(x) #define le16_to_cpu(x) (x) #define le32_to_cpu(x) (x) #define le64_to_cpu(x) (x) #define cpu_to_le16(x) (x) #define cpu_to_le32(x) (x) #define cpu_to_le64(x) (x) #else #define be16_to_cpu(x) (x) #define be32_to_cpu(x) (x) #define be64_to_cpu(x) (x) #define cpu_to_be16(x) (x) #define cpu_to_be32(x) (x) #define cpu_to_be64(x) (x) #define le16_to_cpu(x) __bswap16(x) #define le32_to_cpu(x) __bswap32(x) #define le64_to_cpu(x) __bswap64(x) #define cpu_to_le16(x) __bswap16(x) #define cpu_to_le32(x) __bswap32(x) #define cpu_to_le64(x) __bswap64(x) #endif #endif /* APOS_BITS_H */