#include "uint_t.h"

/**
  @file uint64p.c
  @authors feh, jmh
  @ref djbdns6
  @brief packing/unpacking 64 bit integer to/from char string
*/

void uint64_pack(char s[8], uint64 u)
{
  s[0] = u & 255;
  u >>= 8;
  s[1] = u & 255;
  u >>= 8;
  s[2] = u & 255;
  u >>= 8;
  s[3] = u & 255;
  u >>= 8;
  s[4] = u & 255;
  u >>= 8;
  s[5] = u & 255;
  u >>= 8;
  s[6] = u & 255;
  u >>= 8;
  s[7] = u & 255;
}
void uint64_pack_big(char s[8], uint64 u)
{
  s[7] = u & 255;
  u >>= 8;
  s[6] = u & 255;
  u >>= 8;
  s[5] = u & 255;
  u >>= 8;
  s[4] = u & 255;
  u >>= 8;
  s[3] = u & 255;
  u >>= 8;
  s[2] = u & 255;
  u >>= 8;
  s[1] = u & 255;
  u >>= 8;
  s[0] = u & 255;
}

void uint64_unpack(char s[8], uint64 *u)
{
  uint64 result;

  result = (unsigned char)s[7];
  result <<= 8;
  result += (unsigned char)s[6];
  result <<= 8;
  result += (unsigned char)s[5];
  result <<= 8;
  result += (unsigned char)s[4];
  result <<= 8;
  result += (unsigned char)s[3];
  result <<= 8;
  result += (unsigned char)s[2];
  result <<= 8;
  result += (unsigned char)s[1];
  result <<= 8;
  result += (unsigned char)s[0];

  *u = result;
}
void uint64_unpack_big(char s[8], uint64 *u)
{
  uint64 result;

  result = (unsigned char)s[0];
  result <<= 8;
  result += (unsigned char)s[1];
  result <<= 8;
  result += (unsigned char)s[2];
  result <<= 8;
  result += (unsigned char)s[3];
  result <<= 8;
  result += (unsigned char)s[4];
  result <<= 8;
  result += (unsigned char)s[5];
  result <<= 8;
  result += (unsigned char)s[6];
  result <<= 8;
  result += (unsigned char)s[7];

  *u = result;
}