internal static bool TryParseLetterString(string s, PasswordStyles style, string name, int length, out Letter[] letters, out int value)
{
letters = null;
value = 0;
if (s == null)
{
return(false);
}
// Check and remove flags
bool allowSpecifier = style.HasFlag(PasswordStyles.AllowSpecifier);
style &= ~PasswordStyles.FlagsMask;
PasswordStyles specifier = PasswordStyles.AllowSpecifier;
// Identify the specifier
if (s.StartsWith("0B") || s.StartsWith("0b"))
{
specifier = PasswordStyles.Binary;
}
else if (s.StartsWith("0X") || s.StartsWith("0x"))
{
specifier = PasswordStyles.Hex;
}
// Don't mix up hex/binary numbers with decimal
else if (style != PasswordStyles.Hex && style != PasswordStyles.Binary && IsOnlyDigits(s))
{
specifier = PasswordStyles.Value;
}
// Handle specifier or pure digits
if (specifier == PasswordStyles.Value)
{
// Validate the decimal style
if (style != PasswordStyles.Value && style != PasswordStyles.PasswordOrValue &&
style != PasswordStyles.None)
{
return(false);
}
style = specifier;
}
else if (specifier != PasswordStyles.AllowSpecifier)
{
// Validate the specifier
if (!allowSpecifier || (style != PasswordStyles.None && specifier != style))
{
return(false);
}
style = specifier;
s = s.Substring(2);
}
else if (style == PasswordStyles.PasswordOrValue)
{
// We're not a value, set us to password style
style = PasswordStyles.Password;
}
// No trailing whitespace
if (s.Trim() != s)
{
return(false);
}
// Internal whitespace can be removed from binary
if (style == PasswordStyles.Binary)
{
s = Regex.Replace(s, @"\s+", "");
}
if (style != PasswordStyles.Value)
{
// Make sure the length is correct
if (s.Length != length * (style == PasswordStyles.Binary ? 4 : 1))
{
return(false);
}
// Easymode shortcut
if (length == 0)
{
letters = Array.Empty <Letter>();
return(true);
}
}
// Parse the string
Letter[] newLetters = new Letter[length];
switch (style)
{
case PasswordStyles.None:
case PasswordStyles.Password:
case PasswordStyles.Hex:
for (int i = 0; i < length; i++)
{
if (!TryParseLetter(s.Substring(i, 1), style, out newLetters[i]))
{
return(false);
}
}
break;
case PasswordStyles.Binary:
for (int i = 0; i < length; i++)
{
if (!TryParseLetter(s.Substring(i * 4, 4), style, out newLetters[i]))
{
return(false);
}
}
break;
case PasswordStyles.Value:
if (!int.TryParse(s, out value))
{
return(false);
}
letters = null; // Null signifies a value return
break;
default:
return(false);
}
letters = newLetters;
return(true);
}
internal static bool TryParseLetter(string s, PasswordStyles style, out Letter letter)
{
letter = new Letter();
if (s == null || s.Length == 0)
{
return(false);
}
// Check and remove flags
bool allowSpecifier = style.HasFlag(PasswordStyles.AllowSpecifier);
style &= ~PasswordStyles.FlagsMask;
PasswordStyles specifier = PasswordStyles.AllowSpecifier;
// Identify the specifier
if (s.StartsWith("0B") || s.StartsWith("0b"))
{
specifier = PasswordStyles.Binary;
}
else if (s.StartsWith("0X") || s.StartsWith("0x"))
{
specifier = PasswordStyles.Hex;
}
// Don't mix up hex/binary numbers with decimal
else if (style != PasswordStyles.Hex && style != PasswordStyles.Binary && IsOnlyDigits(s))
{
specifier = PasswordStyles.Value;
}
// Handle specifier or pure digits
if (specifier == PasswordStyles.Value)
{
// Validate the decimal style
if (style != PasswordStyles.Value && style != PasswordStyles.PasswordOrValue &&
style != PasswordStyles.None)
{
return(false);
}
style = specifier;
}
else if (specifier != PasswordStyles.AllowSpecifier)
{
// Validate the specifier
if (!allowSpecifier || (style != PasswordStyles.None && specifier != style))
{
return(false);
}
style = specifier;
s = s.Substring(2);
}
else if (style == PasswordStyles.PasswordOrValue)
{
// We're not a value, set us to password style
style = PasswordStyles.Password;
}
char c;
switch (style)
{
case PasswordStyles.None:
case PasswordStyles.Password:
c = s[0];
if (s.Length != 1 || !Letter.IsValidChar(c))
{
return(false);
}
letter = new Letter(c);
return(true);
case PasswordStyles.Hex:
c = char.ToUpper(s[0]);
if (s.Length != 1 || (!char.IsDigit(c) && c < 'A' && c > 'F'))
{
return(false);
}
letter = new Letter(Convert.ToInt32(s, 16));
return(true);
case PasswordStyles.Binary:
if (s.Length != 4)
{
return(false);
}
for (int i = 0; i < 4; i++)
{
if (s[i] != '0' && s[i] != '1')
{
return(false);
}
}
letter = new Letter(Convert.ToInt32(s, 2));
return(true);
case PasswordStyles.Value:
if (!int.TryParse(s, out int value))
{
return(false);
}
letter = new Letter(value);
return(true);
default:
return(false);
}
}
internal static Letter[] ParseLetterString(string s, PasswordStyles style, string name, int length, out int value)
{
value = 0;
if (s == null)
{
throw new ArgumentNullException(nameof(s));
}
// Check and remove flags
bool allowSpecifier = style.HasFlag(PasswordStyles.AllowSpecifier);
style &= ~PasswordStyles.FlagsMask;
PasswordStyles specifier = PasswordStyles.AllowSpecifier;
// Identify the specifier
if (s.StartsWith("0B") || s.StartsWith("0b"))
{
specifier = PasswordStyles.Binary;
}
else if (s.StartsWith("0X") || s.StartsWith("0x"))
{
specifier = PasswordStyles.Hex;
}
// Don't mix up hex/binary numbers with decimal
else if (style != PasswordStyles.Hex && style != PasswordStyles.Binary && IsOnlyDigits(s))
{
specifier = PasswordStyles.Value;
}
// Handle specifier or pure digits
if (specifier == PasswordStyles.Value)
{
// Validate the decimal style
if (style != PasswordStyles.Value && style != PasswordStyles.PasswordOrValue &&
style != PasswordStyles.None)
{
throw new ArgumentException($"{name} format as value does not match style!");
}
style = specifier;
}
else if (specifier != PasswordStyles.AllowSpecifier)
{
// Validate the specifier
if (!allowSpecifier)
{
throw new ArgumentException($"{name} format specifier is not allowed!");
}
if (style != PasswordStyles.None && specifier != style)
{
throw new ArgumentException($"{name} format specifier does not match style!");
}
style = specifier;
s = s.Substring(2);
}
else if (style == PasswordStyles.PasswordOrValue)
{
// We're not a value, set us to password style
style = PasswordStyles.Password;
}
// No trailing whitespace
if (s.Trim() != s)
{
throw new Exception($"{name} string cannot have trailing whitespace, got \"{s}\"!");
}
// Internal whitespace can be removed from binary
if (style == PasswordStyles.Binary)
{
s = Regex.Replace(s, @"\s+", "");
}
if (style != PasswordStyles.Value)
{
// Make sure the length is correct
if (s.Length != length * (style == PasswordStyles.Binary ? 4 : 1))
{
throw new ArgumentException($"{name} string must be {length} letters long, got {s.Length} letters!",
nameof(s));
}
// Easymode shortcut
if (length == 0)
{
return(Array.Empty <Letter>());
}
}
// Parse the string
Letter[] letters = new Letter[length];
switch (style)
{
case PasswordStyles.None:
case PasswordStyles.Password:
for (int i = 0; i < length; i++)
{
letters[i] = new Letter(s[i]);
}
return(letters);
case PasswordStyles.Hex:
for (int i = 0; i < length; i++)
{
letters[i] = new Letter(Convert.ToInt32(s.Substring(i, 1), 16));
}
return(letters);
case PasswordStyles.Binary:
for (int i = 0; i < length; i++)
{
letters[i] = new Letter(Convert.ToInt32(s.Substring(i * 4, 4), 2));
}
return(letters);
case PasswordStyles.Value:
value = int.Parse(s);
return(null); // Null signifies a value return.
default:
throw new ArgumentException($"Invalid {name} Password Style {style}!");
}
}
internal static Letter ParseLetter(string s, PasswordStyles style)
{
if (s == null)
{
throw new ArgumentNullException(nameof(s));
}
// Check and remove flags
bool allowSpecifier = style.HasFlag(PasswordStyles.AllowSpecifier);
style &= ~PasswordStyles.FlagsMask;
PasswordStyles specifier = PasswordStyles.AllowSpecifier;
// Identify the specifier
if (s.StartsWith("0B") || s.StartsWith("0b"))
{
specifier = PasswordStyles.Binary;
}
else if (s.StartsWith("0X") || s.StartsWith("0x"))
{
specifier = PasswordStyles.Hex;
}
// Don't mix up hex/binary numbers with decimal
else if (style != PasswordStyles.Hex && style != PasswordStyles.Binary && IsOnlyDigits(s))
{
specifier = PasswordStyles.Value;
}
// Handle specifier or pure digits
if (specifier == PasswordStyles.Value)
{
// Validate the decimal style
if (style != PasswordStyles.Value && style != PasswordStyles.PasswordOrValue &&
style != PasswordStyles.None)
{
throw new ArgumentException($"Letter format as value does not match style!");
}
style = specifier;
}
else if (specifier != PasswordStyles.AllowSpecifier)
{
// Validate the specifier
if (!allowSpecifier)
{
throw new ArgumentException($"Letter format specifier is not allowed!");
}
if (style != PasswordStyles.None && specifier != style)
{
throw new ArgumentException($"Letter format specifier does not match style!");
}
style = specifier;
s = s.Substring(2);
}
else if (style == PasswordStyles.PasswordOrValue)
{
// We're not a value, set us to password style
style = PasswordStyles.Password;
}
switch (style)
{
case PasswordStyles.None:
case PasswordStyles.Password:
if (s.Length != 1)
{
throw new ArgumentException($"Letter Password string must be one character long, got {s.Length}!");
}
return(new Letter(s[0]));
case PasswordStyles.Hex:
if (s.Length != 1)
{
throw new ArgumentException($"Letter Hex string must be one character long, got {s.Length}!");
}
return(new Letter(Convert.ToInt32(s, 16)));
case PasswordStyles.Binary:
if (s.Length != 4)
{
throw new ArgumentException($"Letter Binary string must be four characters long, got {s.Length}!");
}
return(new Letter(Convert.ToInt32(s, 2)));
case PasswordStyles.Value:
return(new Letter(int.Parse(s)));
default:
throw new ArgumentException($"Invalid Password Style {style}!");
}
}
