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/* SPDX-License-Identifier: GPL-2.0-only */
#ifndef _COMMONLIB_ENDIAN_H_
#define _COMMONLIB_ENDIAN_H_
#include <stddef.h>
#include <stdint.h>
#include <string.h>
/* Endian agnostic functions working on single byte. */
static inline uint8_t read_ble8(const void *src)
{
const uint8_t *s = src;
return *s;
}
static inline uint8_t read_at_ble8(const void *src, size_t offset)
{
const uint8_t *s = src;
s += offset;
return read_ble8(s);
}
static inline void write_ble8(void *dest, uint8_t val)
{
*(uint8_t *)dest = val;
}
static inline void write_at_ble8(void *dest, uint8_t val, size_t offset)
{
uint8_t *d = dest;
d += offset;
write_ble8(d, val);
}
/* Big Endian functions. */
static inline uint8_t read_be8(const void *src)
{
return read_ble8(src);
}
static inline uint8_t read_at_be8(const void *src, size_t offset)
{
return read_at_ble8(src, offset);
}
static inline void write_be8(void *dest, uint8_t val)
{
write_ble8(dest, val);
}
static inline void write_at_be8(void *dest, uint8_t val, size_t offset)
{
write_at_ble8(dest, val, offset);
}
static inline uint16_t read_be16(const void *src)
{
const uint8_t *s = src;
return (((uint16_t)s[0]) << 8) | (((uint16_t)s[1]) << 0);
}
static inline uint16_t read_at_be16(const void *src, size_t offset)
{
const uint8_t *s = src;
s += offset;
return read_be16(s);
}
static inline void write_be16(void *dest, uint16_t val)
{
write_be8(dest, val >> 8);
write_at_be8(dest, val >> 0, sizeof(uint8_t));
}
static inline void write_at_be16(void *dest, uint16_t val, size_t offset)
{
uint8_t *d = dest;
d += offset;
write_be16(d, val);
}
static inline uint32_t read_be32(const void *src)
{
const uint8_t *s = src;
return (((uint32_t)s[0]) << 24) | (((uint32_t)s[1]) << 16) |
(((uint32_t)s[2]) << 8) | (((uint32_t)s[3]) << 0);
}
static inline uint32_t read_at_be32(const void *src, size_t offset)
{
const uint8_t *s = src;
s += offset;
return read_be32(s);
}
static inline void write_be32(void *dest, uint32_t val)
{
write_be16(dest, val >> 16);
write_at_be16(dest, val >> 0, sizeof(uint16_t));
}
static inline void write_at_be32(void *dest, uint32_t val, size_t offset)
{
uint8_t *d = dest;
d += offset;
write_be32(d, val);
}
static inline uint64_t read_be64(const void *src)
{
uint64_t val;
val = read_be32(src);
val <<= 32;
val |= read_at_be32(src, sizeof(uint32_t));
return val;
}
static inline uint64_t read_at_be64(const void *src, size_t offset)
{
const uint8_t *s = src;
s += offset;
return read_be64(s);
}
static inline void write_be64(void *dest, uint64_t val)
{
write_be32(dest, val >> 32);
write_at_be32(dest, val >> 0, sizeof(uint32_t));
}
static inline void write_at_be64(void *dest, uint64_t val, size_t offset)
{
uint8_t *d = dest;
d += offset;
write_be64(d, val);
}
/* Little Endian functions. */
static inline uint8_t read_le8(const void *src)
{
return read_ble8(src);
}
static inline uint8_t read_at_le8(const void *src, size_t offset)
{
return read_at_ble8(src, offset);
}
static inline void write_le8(void *dest, uint8_t val)
{
write_ble8(dest, val);
}
static inline void write_at_le8(void *dest, uint8_t val, size_t offset)
{
write_at_ble8(dest, val, offset);
}
static inline uint16_t read_le16(const void *src)
{
const uint8_t *s = src;
return (((uint16_t)s[1]) << 8) | (((uint16_t)s[0]) << 0);
}
static inline uint16_t read_at_le16(const void *src, size_t offset)
{
const uint8_t *s = src;
s += offset;
return read_le16(s);
}
static inline void write_le16(void *dest, uint16_t val)
{
write_le8(dest, val >> 0);
write_at_le8(dest, val >> 8, sizeof(uint8_t));
}
static inline void write_at_le16(void *dest, uint16_t val, size_t offset)
{
uint8_t *d = dest;
d += offset;
write_le16(d, val);
}
static inline uint32_t read_le32(const void *src)
{
const uint8_t *s = src;
return (((uint32_t)s[3]) << 24) | (((uint32_t)s[2]) << 16) |
(((uint32_t)s[1]) << 8) | (((uint32_t)s[0]) << 0);
}
static inline uint32_t read_at_le32(const void *src, size_t offset)
{
const uint8_t *s = src;
s += offset;
return read_le32(s);
}
static inline void write_le32(void *dest, uint32_t val)
{
write_le16(dest, val >> 0);
write_at_le16(dest, val >> 16, sizeof(uint16_t));
}
static inline void write_at_le32(void *dest, uint32_t val, size_t offset)
{
uint8_t *d = dest;
d += offset;
write_le32(d, val);
}
static inline uint64_t read_le64(const void *src)
{
uint64_t val;
val = read_at_le32(src, sizeof(uint32_t));
val <<= 32;
val |= read_le32(src);
return val;
}
static inline uint64_t read_at_le64(const void *src, size_t offset)
{
const uint8_t *s = src;
s += offset;
return read_le64(s);
}
static inline void write_le64(void *dest, uint64_t val)
{
write_le32(dest, val >> 0);
write_at_le32(dest, val >> 32, sizeof(uint32_t));
}
static inline void write_at_le64(void *dest, uint64_t val, size_t offset)
{
uint8_t *d = dest;
d += offset;
write_le64(d, val);
}
static inline void zero_n(void *dest, size_t n)
{
memset(dest, 0, n);
}
#endif
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