scrcpy/app/src/util/buffer_util.h

#ifndef BUFFER_UTIL_H
#define BUFFER_UTIL_H

#include "common.h"

#include <stdbool.h>
#include <stdint.h>

static inline void
buffer_write16be(uint8_t *buf, uint16_t value) {
    buf[0] = value >> 8;
    buf[1] = value;
}

static inline void
buffer_write32be(uint8_t *buf, uint32_t value) {
    buf[0] = value >> 24;
    buf[1] = value >> 16;
    buf[2] = value >> 8;
    buf[3] = value;
}

static inline void
buffer_write64be(uint8_t *buf, uint64_t value) {
    buffer_write32be(buf, value >> 32);
    buffer_write32be(&buf[4], (uint32_t) value);
}

static inline uint16_t
buffer_read16be(const uint8_t *buf) {
    return (buf[0] << 8) | buf[1];
}

static inline uint32_t
buffer_read32be(const uint8_t *buf) {
    return ((uint32_t) buf[0] << 24) | (buf[1] << 16) | (buf[2] << 8) | buf[3];
}

static inline uint64_t
buffer_read64be(const uint8_t *buf) {
    uint32_t msb = buffer_read32be(buf);
    uint32_t lsb = buffer_read32be(&buf[4]);
    return ((uint64_t) msb << 32) | lsb;
}

#endif