// This static call constructs a RegexTree from a regular expression
// pattern string and an option string.
//
// The method creates, drives, and drops a parser instance.
internal static RegexTree Parse(String re, RegexOptions op) {
RegexParser p;
RegexNode root;
String[] capnamelist;
p = new RegexParser((op & RegexOptions.CultureInvariant) != 0 ? CultureInfo.InvariantCulture : CultureInfo.CurrentCulture);
p._options = op;
p.SetPattern(re);
p.CountCaptures();
p.Reset(op);
root = p.ScanRegex();
if (p._capnamelist == null)
capnamelist = null;
else
capnamelist = (String[])p._capnamelist.ToArray(typeof(String));
return new RegexTree(root, p._caps, p._capnumlist, p._captop, p._capnames, capnamelist, op);
}
internal static RegexReplacement ParseReplacement(string rep, Hashtable caps, int capsize, Hashtable capnames, RegexOptions op)
{
RegexParser parser = new RegexParser(((op & RegexOptions.CultureInvariant) != RegexOptions.None) ? CultureInfo.InvariantCulture : CultureInfo.CurrentCulture) {
_options = op
};
parser.NoteCaptures(caps, capsize, capnames);
parser.SetPattern(rep);
return new RegexReplacement(rep, parser.ScanReplacement(), caps);
}
internal static RegexTree Parse(string re, RegexOptions op)
{
string[] strArray;
RegexParser parser = new RegexParser(((op & RegexOptions.CultureInvariant) != RegexOptions.None) ? CultureInfo.InvariantCulture : CultureInfo.CurrentCulture) {
_options = op
};
parser.SetPattern(re);
parser.CountCaptures();
parser.Reset(op);
RegexNode root = parser.ScanRegex();
if (parser._capnamelist == null)
{
strArray = null;
}
else
{
strArray = parser._capnamelist.ToArray();
}
return new RegexTree(root, parser._caps, parser._capnumlist, parser._captop, parser._capnames, strArray, op);
}
internal static string Unescape(string input)
{
for (int i = 0; i < input.Length; i++)
{
if (input[i] == '\\')
{
StringBuilder builder = new StringBuilder();
RegexParser parser = new RegexParser(CultureInfo.InvariantCulture);
parser.SetPattern(input);
builder.Append(input, 0, i);
do
{
i++;
parser.Textto(i);
if (i < input.Length)
{
builder.Append(parser.ScanCharEscape());
}
i = parser.Textpos();
int startIndex = i;
while ((i < input.Length) && (input[i] != '\\'))
{
i++;
}
builder.Append(input, startIndex, i - startIndex);
}
while (i < input.Length);
return builder.ToString();
}
}
return input;
}
/*
* This static call constructs a flat concatenation node given
* a replacement pattern.
*/
internal static RegexReplacement ParseReplacement(String rep, Hashtable caps, int capsize, Hashtable capnames, RegexOptions op)
{
RegexParser p;
RegexNode root;
p = new RegexParser((op & RegexOptions.CultureInvariant) != 0 ? CultureInfo.InvariantCulture : CultureInfo.CurrentCulture);
p._options = op;
p.NoteCaptures(caps, capsize, capnames);
p.SetPattern(rep);
root = p.ScanReplacement();
return new RegexReplacement(rep, root, caps);
}
/*
* Escapes all metacharacters (including (,),[,],{,},|,^,$,*,+,?,\, spaces and #)
*/
internal static String Unescape(String input)
{
for (int i = 0; i < input.Length; i++)
{
if (input[i] == '\\')
{
StringBuilder sb = StringBuilderCache.Acquire();
RegexParser p = new RegexParser(CultureInfo.InvariantCulture);
int lastpos;
p.SetPattern(input);
sb.Append(input, 0, i);
do
{
i++;
p.Textto(i);
if (i < input.Length)
sb.Append(p.ScanCharEscape());
i = p.Textpos();
lastpos = i;
while (i < input.Length && input[i] != '\\')
i++;
sb.Append(input, lastpos, i - lastpos);
} while (i < input.Length);
return StringBuilderCache.GetStringAndRelease(sb);
}
}
return input;
}
internal static RegexReplacement ParseReplacement(string rep, System.Collections.Generic.Dictionary<object,object> caps,
int capsize, System.Collections.Generic.Dictionary<object,object> capnames, RegexOptions op)
{
RegexParser parser = new RegexParser(((op & RegexOptions.CultureInvariant) != RegexOptions.None) ? CultureInfo.InvariantCulture : CultureInfo.CurrentCulture);
parser.NoteCaptures(caps, capsize, capnames);
parser.SetPattern(rep);
return new RegexReplacement(rep, parser.ScanReplacement(), caps);
}