private static void AppendDirectoryName(MutableString /*!*/ result, MutableString /*!*/ name)
{
int resultLength = result.GetCharCount();
int i;
for (i = resultLength - 1; i >= 0; i--)
{
if (!IsDirectorySeparator(result.GetChar(i)))
{
break;
}
}
if (i == resultLength - 1)
{
if (!IsDirectorySeparator(name.GetFirstChar()))
{
result.Append(DirectorySeparatorChar);
}
result.Append(name);
}
else if (IsDirectorySeparator(name.GetFirstChar()))
{
result.Replace(i + 1, resultLength - i - 1, name);
}
else
{
result.Append(name);
}
}
private static MutableString /*!*/ AppendEscapeForwardSlash(MutableString /*!*/ result, MutableString /*!*/ pattern)
{
int first = 0;
int patternLength = pattern.GetCharCount();
int i = SkipToUnescapedForwardSlash(pattern, patternLength, 0);
while (i >= 0)
{
Debug.Assert(i < patternLength);
Debug.Assert(pattern.GetChar(i) == '/' && (i == 0 || pattern.GetChar(i - 1) != '\\'));
result.Append(pattern, first, i - first);
result.Append('\\');
first = i; // include forward slash in the next append
i = SkipToUnescapedForwardSlash(pattern, patternLength, i + 1);
}
result.Append(pattern, first, patternLength - first);
return(result);
}
public int GetCharCount()
{
return(_string.GetCharCount());
}
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));
}
