public static CharacterMap /*!*/ Create(MutableString /*!*/ from, MutableString /*!*/ to)
{
Debug.Assert(!from.IsEmpty);
int fromLength = from.GetCharCount();
bool complemental = from.StartsWith('^') && fromLength > 1;
// TODO: kcodings
// TODO: surrogates
// TODO: max - min > threshold
int min, max;
if (from.DetectByteCharacters())
{
min = 0;
max = 255;
}
else
{
min = Int32.MaxValue;
max = -1;
for (int i = (complemental ? 1 : 0); i < fromLength; i++)
{
int c = from.GetChar(i);
if (c < min)
{
min = c;
}
if (c > max)
{
max = c;
}
}
}
BitArray map;
char[] image;
if (complemental || to.IsEmpty)
{
image = null;
map = MakeBitmap(from, fromLength, complemental, min, max);
}
else
{
map = null;
image = new char[max - min + 1];
// no need to initialize the array:
Debug.Assert(Unmapped == 0);
bool needMap = false;
var toEnum = ExpandRanges(to, 0, to.GetCharCount(), true).GetEnumerator();
foreach (var f in ExpandRanges(from, 0, fromLength, false))
{
toEnum.MoveNext();
needMap |= (image[f - min] = toEnum.Current) == Unmapped;
}
if (needMap)
{
map = MakeBitmap(from, fromLength, false, min, max);
}
}
return(new CharacterMap(map, image, complemental ? to.GetLastChar() : -1, complemental, min, max));
}
public bool EndsWith(char value)
{
return(_string.GetLastChar() == value);
}
public static MutableString /*!*/ Basename(RubyClass /*!*/ self,
[DefaultProtocol, NotNull] MutableString /*!*/ path, [DefaultProtocol, NotNull, Optional] MutableString suffix)
{
if (path.IsEmpty)
{
return(path);
}
string strPath = path.ConvertToString();
string[] parts = strPath.Split(new[] { DirectorySeparatorChar, AltDirectorySeparatorChar }, StringSplitOptions.RemoveEmptyEntries);
if (parts.Length == 0)
{
return(MutableString.CreateMutable(path.Encoding).Append((char)path.GetLastChar()).TaintBy(path));
}
if (Environment.OSVersion.Platform != PlatformID.Unix && Environment.OSVersion.Platform != PlatformID.MacOSX)
{
string first = parts[0];
if (strPath.Length >= 2 && IsDirectorySeparator(strPath[0]) && IsDirectorySeparator(strPath[1]))
{
// UNC: skip 2 parts
if (parts.Length <= 2)
{
return(MutableString.CreateMutable(path.Encoding).Append(DirectorySeparatorChar).TaintBy(path));
}
}
else if (first.Length == 2 && Tokenizer.IsLetter(first[0]) && first[1] == ':')
{
// skip drive letter "X:"
if (parts.Length <= 1)
{
var result = MutableString.CreateMutable(path.Encoding).TaintBy(path);
if (strPath.Length > 2)
{
result.Append(strPath[2]);
}
return(result);
}
}
}
string last = parts[parts.Length - 1];
if (MutableString.IsNullOrEmpty(suffix))
{
return(MutableString.CreateMutable(last, path.Encoding));
}
StringComparison comparison = Environment.OSVersion.Platform == PlatformID.Unix ? StringComparison.Ordinal : StringComparison.OrdinalIgnoreCase;
int matchLength = last.Length;
if (suffix != null)
{
string strSuffix = suffix.ToString();
if (strSuffix.LastCharacter() == '*' && strSuffix.Length > 1)
{
int suffixIdx = last.LastIndexOf(
strSuffix.Substring(0, strSuffix.Length - 1),
comparison
);
if (suffixIdx >= 0 && suffixIdx + strSuffix.Length <= last.Length)
{
matchLength = suffixIdx;
}
}
else if (last.EndsWith(strSuffix, comparison))
{
matchLength = last.Length - strSuffix.Length;
}
}
return(MutableString.CreateMutable(path.Encoding).Append(last, 0, matchLength).TaintBy(path));
}
