/// <summary>
/// Modifies the message text so that it is safe to be sent via GSM 7-Bit default encoding.
/// </summary>
/// <param name="data">The message text.</param>
/// <param name="charsCorrected">Will be set to true if the message length was corrected.</param>
/// <param name="lengthCorrected">Will be set to true if one or more characters were replaced.</param>
/// <returns>The converted message text.</returns>
/// <remarks>Replaces invalid characters in the text and truncates it to the maximum allowed length.</remarks>
public static string GetSafeText(string data, out bool lengthCorrected, out bool charsCorrected)
{
string str;
string str1;
bool flag = false;
lengthCorrected = false;
charsCorrected = false;
if (data.Length <= 160)
{
str = data;
}
else
{
str = data.Substring(0, 160);
lengthCorrected = true;
}
do
{
str1 = TextDataConverter.StringTo7Bit(str, false, out flag);
if (flag)
{
charsCorrected = true;
}
if (str1.Length <= 160)
{
continue;
}
str = data.Substring(0, str.Length - 1);
lengthCorrected = true;
}while (str1.Length > 160);
string str2 = TextDataConverter.SevenBitToString(str1);
return(str2);
}
/// <summary>
/// Converts a string consisting of characters from the GSM
/// "7-bit default alphabet" into a string of corresponding characters
/// of the ISO-8859-1 character set.
/// </summary>
/// <param name="s">The string to convert.</param>
/// <returns>The converted string.</returns>
/// <remarks>
/// <para>Note that the converted string does not necessarily have the same
/// length as the original one because some characters may be escaped.</para>
/// <para>This method throws an exception if an invalid character
/// is encountered.</para>
/// </remarks>
public static string SevenBitToString(string s)
{
return(TextDataConverter.SevenBitToString(s, true));
}
/// <summary>
/// Decodes the text from 7-Bit user data.
/// </summary>
/// <param name="userData">The user data to decode. Must contain an encoded GSM 7-Bit default text packed into octets.</param>
/// <returns>The decoded user data.</returns>
public static string Decode7BitText(byte[] userData)
{
string septetsStr = TextDataConverter.OctetsToSeptetsStr(userData);
return(TextDataConverter.SevenBitToString(septetsStr, true));
}