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/* SPDX-License-Identifier: GPL-2.0 */
/** \file portable_io.h Inline functions for binary IO. */
static inline uint64_t read_portable(unsigned bits, const void *buf)
{
uint64_t ret = 0;
int i, num_bytes = bits / 8;
const uint8_t *p = (typeof(p))buf;
for (i = 0; i < num_bytes; i++) {
unsigned char c = p[i];
ret += ((uint64_t)c << (8 * i));
}
return ret;
}
static inline uint64_t read_portable_be(unsigned bits, const void *buf)
{
uint64_t ret = 0;
int i, num_bytes = bits / 8;
const uint8_t *p = (typeof(p))buf;
for (i = 0; i < num_bytes; i++) {
unsigned char c = p[i];
ret += ((uint64_t)c << (8 * (num_bytes - i - 1)));
}
return ret;
}
static inline uint64_t read_u64(const void *buf)
{
return read_portable(64, buf);
}
static inline uint32_t read_u32(const void *buf)
{
return read_portable(32, buf);
}
static inline uint16_t read_u16(const void *buf)
{
return read_portable(16, buf);
}
static inline uint8_t read_u8(const void *buf)
{
return read_portable(8, buf);
}
static inline uint64_t read_u64_be(const void *buf)
{
return read_portable_be(64, buf);
}
static inline uint32_t read_u32_be(const void *buf)
{
return read_portable_be(32, buf);
}
static inline uint16_t read_u16_be(const void *buf)
{
return read_portable_be(16, buf);
}
static inline void write_portable(unsigned bits, char *buf, uint64_t val)
{
int i, num_bytes = bits / 8;
uint8_t *p = (typeof(p))buf;
for (i = 0; i < num_bytes; i++) {
p[i] = val & 0xff;
val = val >> 8;
}
}
static inline void write_portable_be(unsigned bits, char *buf, uint64_t val)
{
int i, num_bytes = bits / 8;
uint8_t *p = (typeof(p))buf;
for (i = 0; i < num_bytes; i++) {
p[num_bytes - i - 1] = val & 0xff;
val = val >> 8;
}
}
static inline void write_u64(void *buf, uint64_t val)
{
write_portable(64, buf, val);
}
static inline void write_u32(void *buf, uint32_t val)
{
write_portable(32, buf, (uint64_t) val);
}
static inline void write_u16(void *buf, uint16_t val)
{
write_portable(16, buf, (uint64_t) val);
}
static inline void write_u8(void *buf, uint8_t val)
{
write_portable(8, buf, (uint64_t) val);
}
static inline void write_u64_be(void *buf, uint64_t val)
{
write_portable_be(64, buf, val);
}
static inline void write_u32_be(void *buf, uint32_t val)
{
write_portable_be(32, buf, (uint64_t) val);
}
static inline void write_u16_be(void *buf, uint16_t val)
{
write_portable_be(16, buf, (uint64_t) val);
}
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