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96 lines
2.3 KiB
96 lines
2.3 KiB
4 months ago
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/* SPDX-License-Identifier: MIT */
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/*
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* Common definitions for libfsverity and the 'fsverity' program
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*
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* Copyright 2018 Google LLC
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*
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* Use of this source code is governed by an MIT-style
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* license that can be found in the LICENSE file or at
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* https://opensource.org/licenses/MIT.
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*/
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#ifndef COMMON_COMMON_DEFS_H
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#define COMMON_COMMON_DEFS_H
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#include <stdbool.h>
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#include <stddef.h>
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#include <stdint.h>
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#include "win32_defs.h"
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typedef uint8_t u8;
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typedef uint16_t u16;
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typedef uint32_t u32;
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typedef uint64_t u64;
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#ifndef __force
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# ifdef __CHECKER__
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# define __force __attribute__((force))
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# else
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# define __force
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# endif
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#endif
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#ifndef __printf
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# define __printf(fmt_idx, vargs_idx) \
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__attribute__((format(printf, fmt_idx, vargs_idx)))
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#endif
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#ifndef __noreturn
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# define __noreturn __attribute__((noreturn))
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#endif
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#ifndef __cold
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# define __cold __attribute__((cold))
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#endif
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#define min(a, b) ({ \
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__typeof__(a) _a = (a); \
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__typeof__(b) _b = (b); \
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_a < _b ? _a : _b; \
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})
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#define max(a, b) ({ \
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__typeof__(a) _a = (a); \
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__typeof__(b) _b = (b); \
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_a > _b ? _a : _b; \
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})
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#define roundup(x, y) ({ \
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__typeof__(y) _y = (y); \
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(((x) + _y - 1) / _y) * _y; \
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})
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#define ARRAY_SIZE(A) (sizeof(A) / sizeof((A)[0]))
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#define DIV_ROUND_UP(n, d) (((n) + (d) - 1) / (d))
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static inline bool is_power_of_2(unsigned long n)
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{
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return n != 0 && ((n & (n - 1)) == 0);
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}
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static inline int ilog2(unsigned long n)
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{
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return (8 * sizeof(n) - 1) - __builtin_clzl(n);
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}
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/* ========== Endianness conversion ========== */
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#if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
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# define cpu_to_le16(v) ((__force __le16)(u16)(v))
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# define le16_to_cpu(v) ((__force u16)(__le16)(v))
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# define cpu_to_le32(v) ((__force __le32)(u32)(v))
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# define le32_to_cpu(v) ((__force u32)(__le32)(v))
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# define cpu_to_le64(v) ((__force __le64)(u64)(v))
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# define le64_to_cpu(v) ((__force u64)(__le64)(v))
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#else
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# define cpu_to_le16(v) ((__force __le16)__builtin_bswap16(v))
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# define le16_to_cpu(v) (__builtin_bswap16((__force u16)(v)))
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# define cpu_to_le32(v) ((__force __le32)__builtin_bswap32(v))
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# define le32_to_cpu(v) (__builtin_bswap32((__force u32)(v)))
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# define cpu_to_le64(v) ((__force __le64)__builtin_bswap64(v))
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# define le64_to_cpu(v) (__builtin_bswap64((__force u64)(v)))
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#endif
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#endif /* COMMON_COMMON_DEFS_H */
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