using System.Text;

namespace MessagingToolkit.QRCode.Codec.Util;

public class QRCodeUtility
{
	public static int sqrt(int val)
	{
		int num = 0;
		int num2 = 32768;
		int num3 = 15;
		do
		{
			int num4;
			if (val >= (num4 = (num << 1) + num2 << num3--))
			{
				num += num2;
				val -= num4;
			}
		}
		while ((num2 >>= 1) > 0);
		return num;
	}

	public static bool IsUniCode(string value)
	{
		byte[] characters = AsciiStringToByteArray(value);
		byte[] characters2 = UnicodeStringToByteArray(value);
		string text = FromASCIIByteArray(characters);
		string text2 = FromUnicodeByteArray(characters2);
		if (text != text2)
		{
			return true;
		}
		return false;
	}

	public static bool IsUnicode(byte[] byteData)
	{
		string str = FromASCIIByteArray(byteData);
		string str2 = FromUnicodeByteArray(byteData);
		byte[] array = AsciiStringToByteArray(str);
		byte[] array2 = UnicodeStringToByteArray(str2);
		if (array[0] != array2[0])
		{
			return true;
		}
		return false;
	}

	public static string FromASCIIByteArray(byte[] characters)
	{
		ASCIIEncoding aSCIIEncoding = new ASCIIEncoding();
		return aSCIIEncoding.GetString(characters);
	}

	public static string FromUnicodeByteArray(byte[] characters)
	{
		UnicodeEncoding unicodeEncoding = new UnicodeEncoding();
		return unicodeEncoding.GetString(characters);
	}

	public static byte[] AsciiStringToByteArray(string str)
	{
		ASCIIEncoding aSCIIEncoding = new ASCIIEncoding();
		return aSCIIEncoding.GetBytes(str);
	}

	public static byte[] UnicodeStringToByteArray(string str)
	{
		UnicodeEncoding unicodeEncoding = new UnicodeEncoding();
		return unicodeEncoding.GetBytes(str);
	}
}