DecodeZigZag64() static private method

Decode a 32-bit value with ZigZag encoding.
ZigZag encodes signed integers into values that can be efficiently encoded with varint. (Otherwise, negative values must be sign-extended to 64 bits to be varint encoded, thus always taking 10 bytes on the wire.)
static private DecodeZigZag64 ( ulong n ) : long
n ulong
return long
CodedInputStream Class Documentation
示例#1
0
        public void RoundTripZigZag64()
        {
            Assert.AreEqual(0, CodedInputStream.DecodeZigZag64(CodedOutputStream.EncodeZigZag64(0)));
            Assert.AreEqual(1, CodedInputStream.DecodeZigZag64(CodedOutputStream.EncodeZigZag64(1)));
            Assert.AreEqual(-1, CodedInputStream.DecodeZigZag64(CodedOutputStream.EncodeZigZag64(-1)));
            Assert.AreEqual(14927, CodedInputStream.DecodeZigZag64(CodedOutputStream.EncodeZigZag64(14927)));
            Assert.AreEqual(-3612, CodedInputStream.DecodeZigZag64(CodedOutputStream.EncodeZigZag64(-3612)));

            Assert.AreEqual(856912304801416L,
                            CodedInputStream.DecodeZigZag64(CodedOutputStream.EncodeZigZag64(856912304801416L)));
            Assert.AreEqual(-75123905439571256L,
                            CodedInputStream.DecodeZigZag64(CodedOutputStream.EncodeZigZag64(-75123905439571256L)));
        }
示例#2
0
 public void DecodeZigZag64()
 {
     Assert.AreEqual(0, CodedInputStream.DecodeZigZag64(0));
     Assert.AreEqual(-1, CodedInputStream.DecodeZigZag64(1));
     Assert.AreEqual(1, CodedInputStream.DecodeZigZag64(2));
     Assert.AreEqual(-2, CodedInputStream.DecodeZigZag64(3));
     Assert.AreEqual(0x000000003FFFFFFFL, CodedInputStream.DecodeZigZag64(0x000000007FFFFFFEL));
     Assert.AreEqual(unchecked ((long)0xFFFFFFFFC0000000L), CodedInputStream.DecodeZigZag64(0x000000007FFFFFFFL));
     Assert.AreEqual(0x000000007FFFFFFFL, CodedInputStream.DecodeZigZag64(0x00000000FFFFFFFEL));
     Assert.AreEqual(unchecked ((long)0xFFFFFFFF80000000L), CodedInputStream.DecodeZigZag64(0x00000000FFFFFFFFL));
     Assert.AreEqual(0x7FFFFFFFFFFFFFFFL, CodedInputStream.DecodeZigZag64(0xFFFFFFFFFFFFFFFEL));
     Assert.AreEqual(unchecked ((long)0x8000000000000000L), CodedInputStream.DecodeZigZag64(0xFFFFFFFFFFFFFFFFL));
 }