systemd/src/basic/unaligned.h

/* SPDX-License-Identifier: LGPL-2.1-or-later */
#pragma once

#include <endian.h>

#include "forward.h"
#include "unaligned-fundamental.h" /* IWYU pragma: export */

/* BE */

static inline uint16_t unaligned_read_be16(const void *_u) {
        const struct __attribute__((__packed__, __may_alias__)) { uint16_t x; } *u = _u;

        return be16toh(u->x);
}

static inline uint32_t unaligned_read_be32(const void *_u) {
        const struct __attribute__((__packed__, __may_alias__)) { uint32_t x; } *u = _u;

        return be32toh(u->x);
}

static inline uint64_t unaligned_read_be64(const void *_u) {
        const struct __attribute__((__packed__, __may_alias__)) { uint64_t x; } *u = _u;

        return be64toh(u->x);
}

static inline void unaligned_write_be16(void *_u, uint16_t a) {
        struct __attribute__((__packed__, __may_alias__)) { uint16_t x; } *u = _u;

        u->x = be16toh(a);
}

static inline void unaligned_write_be32(void *_u, uint32_t a) {
        struct __attribute__((__packed__, __may_alias__)) { uint32_t x; } *u = _u;

        u->x = be32toh(a);
}

static inline void unaligned_write_be64(void *_u, uint64_t a) {
        struct __attribute__((__packed__, __may_alias__)) { uint64_t x; } *u = _u;

        u->x = be64toh(a);
}

/* LE */

static inline uint16_t unaligned_read_le16(const void *_u) {
        const struct __attribute__((__packed__, __may_alias__)) { uint16_t x; } *u = _u;

        return le16toh(u->x);
}

static inline uint32_t unaligned_read_le32(const void *_u) {
        const struct __attribute__((__packed__, __may_alias__)) { uint32_t x; } *u = _u;

        return le32toh(u->x);
}

static inline uint64_t unaligned_read_le64(const void *_u) {
        const struct __attribute__((__packed__, __may_alias__)) { uint64_t x; } *u = _u;

        return le64toh(u->x);
}

static inline void unaligned_write_le16(void *_u, uint16_t a) {
        struct __attribute__((__packed__, __may_alias__)) { uint16_t x; } *u = _u;

        u->x = le16toh(a);
}

static inline void unaligned_write_le32(void *_u, uint32_t a) {
        struct __attribute__((__packed__, __may_alias__)) { uint32_t x; } *u = _u;

        u->x = le32toh(a);
}

static inline void unaligned_write_le64(void *_u, uint64_t a) {
        struct __attribute__((__packed__, __may_alias__)) { uint64_t x; } *u = _u;

        u->x = le64toh(a);
}