using UnityEngine;

using System;
using System.Collections;
using System.Text;

public static class ExtensionString
{
    public static T ToEnum<T>(this string str)
    {
        return (T)Enum.Parse(typeof(T), str);
    }

    public static string Remove(this string str, int startIndex, int endIndex, bool empty)
    {
        if (startIndex > endIndex)
        {
            throw new Exception();
        }

        return str.Remove(startIndex, endIndex - startIndex + 1);
    }

    public static string ReplaceByLength(this string str, int index, int length, string newStr)
    {
        str = str.Remove(index, length);

        str = str.Insert(index, newStr);

        return str;
    }

    public static string Replace(this string str, int startIndex, int endIndex, string newStr)
    {
        if (startIndex > endIndex)
        {
            throw new Exception();
        }

        str = str.Remove(startIndex, endIndex - startIndex + 1);

        str = str.Insert(startIndex, newStr);

        return str;
    }

    public static string Between(this string str, int startIndex, int endIndex)
    {
        if (startIndex > endIndex)
        {
            return "";
        }
        else if (startIndex == endIndex)
        {
            return str[startIndex].ToString();
        }
        else
        {
            return str.Substring(startIndex, endIndex - startIndex + 1);
        }
    }

    public static int GetBytes(this string str)
    {
        if (str.Equals(string.Empty))
            return 0;
        int strlen = 0;
        ASCIIEncoding strData = new ASCIIEncoding();
        //将字符串转换为ASCII编码的字节数字
        byte[] strBytes = strData.GetBytes(str);
        for (int i = 0; i <= strBytes.Length - 1; i++)
        {
            if (strBytes[i] == 63)  //中文都将编码为ASCII编码63,即"?"号
                strlen++;
            strlen++;
        }
        return strlen;
    }



}