Endianness_Notes

• if low order bytes come first, little endian
• if high order bytes come first, big endian
  • The internet uses network order which is big endian

Will be saving game as big endian

• Must convert size and version from little to big endian

    int j = 5; // 32 bits, 4 bytes, 8 bits per byte
    // little endian j : 00000101 00000000 00000000 00000000
    // low order bytes come first

    // big endian j : 00000000 00000000 00000000 00000101
    // high order bytes come first

• Endianness does not apply to one byte values, obviously (nothing to switch)
  • Since chars are one byte, this applies to them

How to do the conversion

    #include <endian.h>

    int htobe32(int x); // use when writing
    int be32toh(int x); // use when reading