public function ParagonIE_Sodium_Core32_Int64::addInt64 in Automatic Updates 7

Same name and namespace in other branches

1. 8 vendor/paragonie/sodium_compat/src/Core32/Int64.php \ParagonIE_Sodium_Core32_Int64::addInt64()

Adds two int64 objects

Parameters

ParagonIE_Sodium_Core32_Int64 $addend:

Return value

ParagonIE_Sodium_Core32_Int64

File

vendor/paragonie/sodium_compat/src/Core32/Int64.php, line 50

Class

ParagonIE_Sodium_Core32_Int64

Class ParagonIE_Sodium_Core32_Int64

Code

public function addInt64(ParagonIE_Sodium_Core32_Int64 $addend) {
  $i0 = $this->limbs[0];
  $i1 = $this->limbs[1];
  $i2 = $this->limbs[2];
  $i3 = $this->limbs[3];
  $j0 = $addend->limbs[0];
  $j1 = $addend->limbs[1];
  $j2 = $addend->limbs[2];
  $j3 = $addend->limbs[3];
  $r3 = $i3 + ($j3 & 0xffff);
  $carry = $r3 >> 16;
  $r2 = $i2 + ($j2 & 0xffff) + $carry;
  $carry = $r2 >> 16;
  $r1 = $i1 + ($j1 & 0xffff) + $carry;
  $carry = $r1 >> 16;
  $r0 = $i0 + ($j0 & 0xffff) + $carry;
  $carry = $r0 >> 16;
  $r0 &= 0xffff;
  $r1 &= 0xffff;
  $r2 &= 0xffff;
  $r3 &= 0xffff;
  $return = new ParagonIE_Sodium_Core32_Int64(array(
    $r0,
    $r1,
    $r2,
    $r3,
  ));
  $return->overflow = $carry;
  $return->unsignedInt = $this->unsignedInt;
  return $return;
}