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Added extra dictionary mapping from string -> uint #62

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Nov 16, 2018
Merged

Added extra dictionary mapping from string -> uint #62

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b2b43b6
Added extra dictionary mapping from string -> uint
igormcoelho Oct 24, 2018
20ba673
public access method
igormcoelho Oct 24, 2018
d91d4b7
Using Interop hash dictionary on Helper method
igormcoelho Nov 7, 2018
d3cf7de
caching only for strings
igormcoelho Nov 13, 2018
991b8f0
minor change
erikzhang Nov 14, 2018
d5681d6
change `ToInteropMethodHash()` to allow `string` only
erikzhang Nov 15, 2018
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11 changes: 9 additions & 2 deletions src/neo-vm/Helper.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -2,11 +2,14 @@
using System.IO;
using System.Security.Cryptography;
using System.Text;
using System.Collections.Generic;

namespace Neo.VM
{
public static class Helper
{
private static Dictionary<byte[], uint> dictionary = new Dictionary<byte[], uint>();
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internal static byte[] ReadVarBytes(this BinaryReader reader, int max = 0X7fffffc7)
{
return reader.ReadBytes((int)reader.ReadVarInt((ulong)max));
Expand Down Expand Up @@ -40,10 +43,14 @@ public static uint ToInteropMethodHash(this string method)

public static uint ToInteropMethodHash(this byte[] method)
{
using (SHA256 sha = SHA256.Create())
if(!dictionary.ContainsKey(method))
{
return BitConverter.ToUInt32(sha.ComputeHash(method), 0);
using (SHA256 sha = SHA256.Create())
{
dictionary[method] = BitConverter.ToUInt32(sha.ComputeHash(method), 0);
}
}
return dictionary[method];
}

internal static void WriteVarBytes(this BinaryWriter writer, byte[] value)
Expand Down