/** * Read 64-bit unsiged integer to $var. If the buffer has less than 8 bytes, * return false. Advance buffer with consumed bytes. * @param $var. */ public function readLittleEndian64(&$var) { $data = null; if (!$this->readRaw(4, $data)) { return false; } $low = unpack('V', $data)[1]; if (!$this->readRaw(4, $data)) { return false; } $high = unpack('V', $data)[1]; $var = Uint64::newValue($high, $low); return true; }
public static function zigZagEncode64($int64) { $a = $int64->copy()->leftShift(1); $b = $int64->copy()->rightShift(63); $result = $a->bitXor($b); $uint64 = Uint64::newValue($result->high, $result->low); return $uint64; }
public function testZigZagEncodeDecode() { $this->assertSame(0, GPBWire::zigZagEncode32(0)); $this->assertSame(1, GPBWire::zigZagEncode32(-1)); $this->assertSame(2, GPBWire::zigZagEncode32(1)); $this->assertSame(3, GPBWire::zigZagEncode32(-2)); $this->assertSame(0x7ffffffe, GPBWire::zigZagEncode32(0x3fffffff)); $this->assertSame(0x7fffffff, GPBWire::zigZagEncode32(0xc0000000)); $this->assertSame(-2, GPBWire::zigZagEncode32(0x7fffffff)); $this->assertSame(-1, GPBWire::zigZagEncode32(0x80000000)); $this->assertSame(0, GPBWire::zigZagDecode32(0)); $this->assertSame(-1, GPBWire::zigZagDecode32(1)); $this->assertSame(1, GPBWire::zigZagDecode32(2)); $this->assertSame(-2, GPBWire::zigZagDecode32(3)); $this->assertSame(0x3fffffff, GPBWire::zigZagDecode32(0x7ffffffe)); $this->assertSame(-1073741824, GPBWire::zigZagDecode32(0x7fffffff)); $this->assertSame(0x7fffffff, GPBWire::zigZagDecode32(0xfffffffe)); $this->assertSame(-2147483648, GPBWire::zigZagDecode32(0xffffffff)); $this->assertEquals(GPBUtil::Uint64(0), GPBWire::zigZagEncode64(GPBUtil::Int64(0))); $this->assertEquals(GPBUtil::Uint64(1), GPBWire::zigZagEncode64(GPBUtil::Int64(-1))); $this->assertEquals(GPBUtil::Uint64(2), GPBWire::zigZagEncode64(GPBUtil::Int64(1))); $this->assertEquals(GPBUtil::Uint64(3), GPBWire::zigZagEncode64(GPBUtil::Int64(-2))); $this->assertEquals(GPBUtil::Uint64(0x7ffffffe), GPBWire::zigZagEncode64(GPBUtil::Int64(0x3fffffff))); $this->assertEquals(GPBUtil::Uint64(0x7fffffff), GPBWire::zigZagEncode64(GPBUtil::Int64(1.844674407263581E+19))); $this->assertEquals(GPBUtil::Uint64(0xfffffffe), GPBWire::zigZagEncode64(GPBUtil::Int64(0x7fffffff))); $this->assertEquals(GPBUtil::Uint64(0xffffffff), GPBWire::zigZagEncode64(GPBUtil::Int64(1.8446744071562068E+19))); $this->assertEquals(Uint64::newValue(4294967295, 4294967294), GPBWire::zigZagEncode64(GPBUtil::Int64(0x7fffffffffffffff))); $this->assertEquals(Uint64::newValue(4294967295, 4294967295), GPBWire::zigZagEncode64(GPBUtil::Int64(9.223372036854776E+18))); $this->assertEquals(GPBUtil::Int64(0), GPBWire::zigZagDecode64(GPBUtil::Uint64(0))); $this->assertEquals(GPBUtil::Int64(-1), GPBWire::zigZagDecode64(GPBUtil::Uint64(1))); $this->assertEquals(GPBUtil::Int64(1), GPBWire::zigZagDecode64(GPBUtil::Uint64(2))); $this->assertEquals(GPBUtil::Int64(-2), GPBWire::zigZagDecode64(GPBUtil::Uint64(3))); // Round trip $this->assertSame(0, GPBWire::zigZagDecode32(GPBWire::zigZagEncode32(0))); $this->assertSame(1, GPBWire::zigZagDecode32(GPBWire::zigZagEncode32(1))); $this->assertSame(-1, GPBWire::zigZagDecode32(GPBWire::zigZagEncode32(-1))); $this->assertSame(14927, GPBWire::zigZagDecode32(GPBWire::zigZagEncode32(14927))); $this->assertSame(-3612, GPBWire::zigZagDecode32(GPBWire::zigZagEncode32(-3612))); }