private static ulong Extract(IReadOnlyString source, int offset, int count, ulong accumulator, UUIDParseFormat format)
{
for (int i = offset; i < offset + count; i += 1)
{
int d = HexDigit(source[i], format);
if (d == -1)
{
throw new ArgumentException("UUID is improperly formatted.");
}
accumulator = (accumulator << 4) | (uint)d;
}
return(accumulator);
}
private static bool CanExtract(IReadOnlyString source, int offset, int count, ulong accumulator, UUIDParseFormat format)
{
if (offset + count - 1 >= source.Length)
{
return(false);
}
for (int i = offset; i < offset + count; i += 1)
{
int d = HexDigit(source[i], format);
if (d == -1)
{
return(false);
}
}
return(true);
}
/// <summary>
/// Assign this UUID by string with offset using specified <see cref="UUIDParseFormat"/>.
/// </summary>
/// <param name="str">string</param>
/// <param name="offset">offset</param>
/// <param name="format">Input string format.</param>
public UUID(IReadOnlyString str, int offset = 0, UUIDParseFormat format = UUIDParseFormat.Any)
{
if (str == null)
{
throw new ArgumentNullException(nameof(str));
}
if (str.Length < offset + 32)
{
throw new ArgumentException("UUID is too short.", nameof(str));
}
if (format == UUIDParseFormat.Any)
{
format = str[offset + 8] == '-' ? UUIDParseFormat.AnyCase : UUIDParseFormat.AnyCaseWithoutDashes;
}
switch (format)
{
case UUIDParseFormat.LowerCase:
case UUIDParseFormat.UpperCase:
case UUIDParseFormat.AnyCase:
{
ulong m = Extract(str, offset, 8, 0UL, format);
if (str[offset + 8] != '-')
{
throw new ArgumentException("UUID is improperly formatted", str.ToString());
}
m = Extract(str, offset + 9, 4, m, format);
if (str[offset + 13] != '-')
{
throw new ArgumentException("UUID is improperly formatted", str.ToString());
}
m = Extract(str, offset + 14, 4, m, format);
if (str[offset + 18] != '-')
{
throw new ArgumentException("UUID is improperly formatted", str.ToString());
}
ulong l = Extract(str, offset + 19, 4, 0L, format);
if (str[offset + 23] != '-')
{
throw new ArgumentException("UUID is improperly formatted", str.ToString());
}
l = Extract(str, offset + 24, 12, l, format);
MSB = m;
LSB = l;
break;
}
case UUIDParseFormat.LowerCaseWithoutDashes:
case UUIDParseFormat.UpperCaseWithoutDashes:
case UUIDParseFormat.AnyCaseWithoutDashes:
MSB = Extract(str, offset, 16, 0L, format);
LSB = Extract(str, offset + 16, 16, 0L, format);
break;
default:
throw new ArgumentException("Unsupported format", format.ToString());
}
}
/// <summary>
/// Assign this UUID by string using specified <see cref="UUIDParseFormat"/>.
/// </summary>
/// <param name="str">string</param>
/// <param name="format">Input string format.</param>
public UUID(IReadOnlyString str, UUIDParseFormat format)
: this(str, 0, format)
{
}
/// <summary>
/// Return true if you can parse string as valid uuid.
/// </summary>
/// <param name="str">String</param>
/// <param name="offset">Offset of string</param>
/// <param name="format">Format of string</param>
/// <param name="output">UUID.Empty if str is not valid uuid or parsed uuid if valid</param>
/// <returns>True if you can parse string as valid uuid.</returns>
public static bool TryParse(IReadOnlyString str, int offset, UUIDParseFormat format, out UUID output)
{
output = Empty;
if (str == null)
{
return(false);
}
if (str.Length < offset + 32)
{
return(false);
}
if (format == UUIDParseFormat.Any)
{
format = str[offset + 8] == '-' ? UUIDParseFormat.AnyCase : UUIDParseFormat.AnyCaseWithoutDashes;
}
switch (format)
{
case UUIDParseFormat.LowerCase:
case UUIDParseFormat.UpperCase:
case UUIDParseFormat.AnyCase:
{
if (!CanExtract(str, offset, 8, 0L, format))
{
return(false);
}
ulong m = Extract(str, offset, 8, 0L, format);
if (str[offset + 8] != '-')
{
return(false);
}
if (!CanExtract(str, offset + 9, 4, m, format))
{
return(false);
}
m = Extract(str, offset + 9, 4, m, format);
if (str[offset + 13] != '-')
{
return(false);
}
if (!CanExtract(str, offset + 14, 4, m, format))
{
return(false);
}
m = Extract(str, offset + 14, 4, m, format);
if (str[offset + 18] != '-')
{
return(false);
}
if (!CanExtract(str, offset + 19, 4, 0L, format))
{
return(false);
}
ulong l = Extract(str, offset + 19, 4, 0L, format);
if (str[offset + 23] != '-')
{
return(false);
}
if (!CanExtract(str, offset + 24, 12, l, format))
{
return(false);
}
l = Extract(str, offset + 24, 12, l, format);
output.MSB = m;
output.LSB = l;
break;
}
case UUIDParseFormat.LowerCaseWithoutDashes:
case UUIDParseFormat.UpperCaseWithoutDashes:
case UUIDParseFormat.AnyCaseWithoutDashes:
if ((!CanExtract(str, offset, 16, 0L, format)) || (!CanExtract(str, offset + 16, 16, 0L, format)))
{
return(false);
}
output.MSB = Extract(str, offset, 16, 0L, format);
output.LSB = Extract(str, offset + 16, 16, 0L, format);
break;
}
return(true);
}
/// <summary>
/// Return true if you can parse string as valid uuid.
/// </summary>
/// <param name="str">String</param>
/// <param name="format">Format of string</param>
/// <param name="output">UUID.Empty if str is not valid uuid or parsed uuid if valid</param>
/// <returns>True if you can parse string as valid uuid.</returns>
public static bool TryParse(IReadOnlyString str, UUIDParseFormat format, out UUID output)
{
return(TryParse(str, 0, format, out output));
}
/// <summary>
/// Return true if you can parse string as valid uuid.
/// </summary>
/// <param name="str">String</param>
/// <param name="offset">Offset of string</param>
/// <param name="output">UUID.Empty if str is not valid uuid or parsed uuid if valid</param>
/// <returns>True if you can parse string as valid uuid.</returns>
public static bool TryParse(IReadOnlyString str, int offset, out UUID output)
{
return(TryParse(str, offset, UUIDParseFormat.Any, out output));
}
/// <summary>
/// Return true if you can parse string as valid uuid.
/// </summary>
/// <param name="str">String</param>
/// <param name="output">UUID.Empty if str is not valid uuid or parsed uuid if valid</param>
/// <returns>True if you can parse string as valid uuid.</returns>
public static bool TryParse(IReadOnlyString str, out UUID output)
{
return(TryParse(str, 0, out output));
}
/// <summary>
/// Return true if string is valid uuid.
/// </summary>
/// <param name="str">string</param>
/// <param name="format">format of uuid.</param>
/// <returns>True if string is valid uuid.</returns>
public static bool IsValid(IReadOnlyString str, UUIDParseFormat format)
{
return(IsValid(str, 0, format));
}
/// <summary>
/// Return true if string is valid uuid.
/// </summary>
/// <param name="str">string</param>
/// <param name="offset">offset of string</param>
/// <returns>true if string is valid uuid.</returns>
public static bool IsValid(IReadOnlyString str, int offset)
{
return(IsValid(str, offset, UUIDParseFormat.Any));
}
/// <summary>
/// Return true if string is valid uuid.
/// </summary>
/// <param name="str">string</param>
/// <returns>true if string is valid uuid.</returns>
public static bool IsValid(IReadOnlyString str)
{
return(IsValid(str, 0));
}
