endian.h

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#pragma once
 
#include <stdint.h>
 
// Convert 32-bit integer from host byte order to network byte order
static inline uint32_t htonl(uint32_t hostlong) {
  // Check if the system is little-endian
  if (__BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__) {
    // Swap byte order for little-endian systems
    return ((hostlong & 0xFF000000) >> 24) |
           ((hostlong & 0x00FF0000) >> 8)  |
           ((hostlong & 0x0000FF00) << 8)  |
           ((hostlong & 0x000000FF) << 24);
  } else {
    // On big-endian systems, no conversion is needed
    return hostlong;
  }
}
 
// Convert 16-bit integer from host byte order to network byte order
static inline uint16_t htons(uint16_t hostshort) {
  // Check if the system is little-endian
  if (__BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__) {
    // Swap byte order for little-endian systems
    return ((hostshort & 0xFF00) >> 8) |
           ((hostshort & 0x00FF) << 8);
  } else {
    // On big-endian systems, no conversion is needed
    return hostshort;
  }
}
 
// Convert 32-bit integer from network byte order to host byte order
static inline uint32_t ntohl(uint32_t netlong) {
  // The implementation is the same as htonl (reversed operation)
  return htonl(netlong);
}
 
// Convert 16-bit integer from network byte order to host byte order
static inline uint16_t ntohs(uint16_t netshort) {
  // The implementation is the same as htons (reversed operation)
  return htons(netshort);
}