public static StringToBytes ( string thestring ) : byte[] | ||
thestring | string | |
리턴 | byte[] |
public override string PrefixForByteCount(string s, int maxbytecount) { byte[] inputbytes = BplusTree.StringToBytes(s); MD5 d = MD5.Create(); byte[] digest = d.ComputeHash(inputbytes); var resultbytes = new byte[maxbytecount]; // copy digest translating to printable ascii for (int i = 0; i < maxbytecount; i++) { int r = digest[i % digest.Length]; if (r > 127) { r = 256 - r; } if (r < 0) { r = -r; } //Console.WriteLine(" before "+i+" "+r); r = r % 79 + 40; // printable ascii //Console.WriteLine(" "+i+" "+r); resultbytes[i] = (byte)r; } string result = BplusTree.BytesToString(resultbytes); return(result); }
public byte[] dump() { ArrayList allbytes = new ArrayList(); int byteCount = 0; for (int index = 0; index < this.keys.Count; index++) { string thisKey = (string)this.keys[index]; byte[] thisValue = (byte[])this.values[index]; byte[] keyprefix = new byte[BufferFile.INTSTORAGE]; byte[] keybytes = BplusTree.StringToBytes(thisKey); BufferFile.Store(keybytes.Length, keyprefix, 0); allbytes.Add(keyprefix); allbytes.Add(keybytes); byte[] valueprefix = new byte[BufferFile.INTSTORAGE]; BufferFile.Store(thisValue.Length, valueprefix, 0); allbytes.Add(valueprefix); allbytes.Add(thisValue); } foreach (object thing in allbytes) { byte[] thebytes = (byte[])thing; byteCount += thebytes.Length; } int outindex = 0; byte[] result = new byte[byteCount]; foreach (object thing in allbytes) { byte[] thebytes = (byte[])thing; int thelength = thebytes.Length; Array.Copy(thebytes, 0, result, outindex, thelength); outindex += thelength; } if (outindex != byteCount) { throw new BplusTreeException("error counting bytes in dump " + outindex + "!=" + byteCount); } return(result); }