C# 二進制替換第一彈 byte 數組替換

在做通訊相關的數據操作時經常需要用到 byte[] byte 數組替換操作.比如協義轉換相關的

現在提供了幾種替換的方法

    /// 

    /// 二進制數據 操作
    /// 
    public class HexUtility
    {
        /// 

        /// 二進制替換,如果沒有替換則返回原數組對像的復本.
        /// 
        /// 源數據
        /// 需要替換的數據
        /// 將要替換成為的數據
        public static byte[] Replace(byte[] sourceByteArray, byte[] oldValue, byte[] newValue)
        {
            //創建新數據多出1字節
            int newArrayLen = (int)((newValue.Length / (double)oldValue.Length) * sourceByteArray.Length) + 1;
            //得到數組長度
            newArrayLen = Math.Max(newArrayLen, sourceByteArray.Length);
            //新的最後結果數組
            byte[] newByteArray = new byte[newArrayLen];
            //新數組的當前索引
            int curIndex = 0;
            //開始結束
            int start = -1;
            int end = -1;
            //當前查找到的索引
            int oldCurindex = 0;
            //替換數據替換
            for (int x = 0; x < sourceByteArray.Length; x++)
            {
                //查找要替換的數據
                if (sourceByteArray[x] == oldValue[oldCurindex])
                {
                    if (oldCurindex == 0)
                    {
                        start = x;
                    }
                    if (oldCurindex == oldValue.Length - 1)
                    {
                        end = x;
                        oldCurindex = 0;
                    }
                    else
                    {
                        oldCurindex++;
                    }
                }
                else
                {
                    oldCurindex = 0;
                    newByteArray[curIndex] = sourceByteArray[x];
                    curIndex++;
                }
                //數據查找完成
                if (start != -1 && end != -1)
                {
                    //復制替換數據
                    Buffer.BlockCopy(newValue, 0, newByteArray, curIndex, newValue.Length);
                    //計算新數組的偏移量
                    curIndex += newValue.Length;
                    //重新設置需要復制索引的索引
                    start = end = -1;
                }
            }

            //處理返回結果
            byte[] result = null;
            if (curIndex != 0)
            {
                result = new byte[curIndex];
                Buffer.BlockCopy(newByteArray, 0, result, 0, result.Length);
            }
            else
            {
                result = new byte[sourceByteArray.Length];
                Buffer.BlockCopy(sourceByteArray, 0, result, 0, result.Length);
            }
            return result;
        }

        /// 

        /// 二進制替換,如果沒有替換則返回原數組對像的復本.
        /// 
        /// 源數據
        /// 需要替換的數據集合
        public static byte[] Replace(byte[] sourceByteArray, List replaces)
        {


            //創建新數據多出1字節
            int newArrayLen = (int)((replaces.Sum(p => p.newValue.Length) / (double)replaces.Sum(p => p.oldValue.Length)) * sourceByteArray.Length) + 1;
            //得到數組長度
            newArrayLen = Math.Max(newArrayLen, sourceByteArray.Length);
            //新的最後結果數組
            byte[] newByteArray = new byte[newArrayLen];
            //新數組的當前索引
            int curIndex = 0;
            bool find = false;
            //替換數據替換
            for (int x = 0; x < sourceByteArray.Length; x++)
            {

                foreach (HexReplaceEntity rep in replaces)
                {
                    //查找要替換的數據
                    if (sourceByteArray[x] == rep.oldValue[rep.oldCurindex])
                    {
                        if (rep.oldCurindex == 0)
                        {
                            rep.start = x;
                        }
                        if (rep.oldCurindex == rep.oldValue.Length - 1)
                        {
                            rep.end = x;
                            rep.oldCurindex = 0;
                        }
                        else
                        {
                            rep.oldCurindex++;
                        }
                    }
                    else
                    {
                        rep.oldCurindex = 0;
                        newByteArray[curIndex] = sourceByteArray[x];
                        find = false;
                    }
                    //數據查找完成
                    if (rep.start != -1 && rep.end != -1)
                    {
                        find = true;
                        if (rep.newValue.Length >= rep.oldValue.Length)
                        {
                            //復制替換數據
                            Buffer.BlockCopy(rep.newValue, 0, newByteArray, curIndex, rep.newValue.Length);
                            //計算新數組的偏移量
                            curIndex += rep.newValue.Length;
                        }
                        else
                        //由大字節替換為少字節時出現了問題
                        {
                            curIndex -= rep.end - rep.start;
                            //復制替換數據
                            Buffer.BlockCopy(rep.newValue, 0, newByteArray, curIndex, rep.newValue.Length);
                            //計算新數組的偏移量
                            curIndex += rep.newValue.Length;
                        }
                        //重新設置需要復制索引的索引
                        rep.start = rep.end = -1;
                        break;
                    }
                }
                if (!find)
                {
                    curIndex++;
                }
            }

            //處理返回結果
            byte[] result = null;
            if (curIndex != 0)
            {
                result = new byte[curIndex];
                Buffer.BlockCopy(newByteArray, 0, result, 0, result.Length);
            }
            else
            {
                result = new byte[sourceByteArray.Length];
                Buffer.BlockCopy(sourceByteArray, 0, result, 0, result.Length);
            }
            return result;
        }




    }
    /// 

    /// 替換數據實體
    /// 
    public class HexReplaceEntity
    {
        /// 

        /// 需要替換的原始值
        /// 
        public byte[] oldValue { get; set; }

        /// 

        /// 新值
        /// 
        public byte[] newValue { get; set; }

        /// 

        /// 默認開始結束標記
        /// 
        internal int start = -1;
        /// 

        /// 默認開始結束標記
        /// 
        internal int end = -1;

        //當前查找到的索引
        internal int oldCurindex = 0;

    }