public void Push(char ch)
{
org.Append(ch);
switch (ch)
{
case ':':
if (escape)
{
goto default;
}
if (first || lastPushedChar == '[')
{
wordBuilder = new StringBuilder();
subClass = new CharacterClass();
subClass.Add(':');
firstInSubClass = true;
}
else
{
if (wordBuilder != null)
{
ConvertUnicodeCategory(wordBuilder.ToString());
wordBuilder = null;
subClass = null;
}
else
{
goto default;
}
}
break;
case '^':
if (first || firstInSubClass)
{
firstInSubClass = false;
negativeGroup = true;
break;
}
goto default;
case '{':
if (readUnicodeGroup)
{
return;
}
goto default;
case '}':
if (readUnicodeGroup)
{
readUnicodeGroup = false;
unicodeGroups.Add(unicodeGroupBuilder.ToString());
unicodeGroupBuilder.Length = 0;
return;
}
goto default;
case '[':
if (escape)
{
goto default;
}
PushLastChar();
break;
case ']':
if (escape)
{
goto default;
}
break;
case '\\':
if (escape || wordBuilder != null)
{
goto default;
}
escape = true;
break;
case '-':
if (escape || first || wordBuilder != null)
{
goto default;
}
range = true;
break;
default:
if (readUnicodeGroup)
{
unicodeGroupBuilder.Append(ch);
return;
}
if (escape)
{
PushLastChar();
switch (ch)
{
case 'w': // A word character ([a - zA - Z0 - 9_])
AddRange('a', 'z');
AddRange('A', 'Z');
AddRange('0', '9');
table ['_'] = negativeGroup ? -1 : 1;
break;
case 'W': // A non-word character ([^a-zA-Z0-9_]).
for (int i = 0; i < table.Length; i++)
{
if ('0' <= i && i <= '9')
{
continue;
}
if ('a' <= i && i <= 'z')
{
continue;
}
if ('A' <= i && i <= 'Z')
{
continue;
}
if (i == '_')
{
continue;
}
table [i] = negativeGroup ? -1 : 1;
}
break;
case 'd': // A digit character ([0-9])
AddRange('0', '9');
break;
case 'D': // A non-digit character ([^0-9])
for (int i = 0; i < table.Length; i++)
{
if ('0' <= i && i <= '9')
{
continue;
}
table [i] = negativeGroup ? -1 : 1;
}
break;
case 'h': // A hexdigit character ([0-9a-fA-F])
AddRange('0', '9');
AddRange('a', 'f');
AddRange('A', 'F');
break;
case 'H': // A non-hexdigit character ([^0-9a-fA-F])
for (int i = 0; i < table.Length; i++)
{
if ('0' <= i && i <= '9')
{
continue;
}
if ('a' <= i && i <= 'f')
{
continue;
}
if ('A' <= i && i <= 'F')
{
continue;
}
table [i] = negativeGroup ? -1 : 1;
}
break;
case 's': // A whitespace character: /[ \t\r\n\f]/
table [' '] = negativeGroup ? -1 : 1;
table ['\t'] = negativeGroup ? -1 : 1;
table ['\r'] = negativeGroup ? -1 : 1;
table ['\n'] = negativeGroup ? -1 : 1;
table ['\f'] = negativeGroup ? -1 : 1;
break;
case 'S': // A non-whitespace character: /[^ \t\r\n\f]/
for (int i = 0; i < table.Length; i++)
{
if (" \\t\\r\\n\\f".Contains((char)i))
{
continue;
}
table [i] = negativeGroup ? -1 : 1;
}
break;
case 'a':
table ['\a'] = negativeGroup ? -1 : 1;
break;
case 'b':
table ['\b'] = negativeGroup ? -1 : 1;
break;
case 't':
table ['\t'] = negativeGroup ? -1 : 1;
break;
case 'r':
table ['\r'] = negativeGroup ? -1 : 1;
break;
case 'v':
table ['\v'] = negativeGroup ? -1 : 1;
break;
case 'f':
table ['\f'] = negativeGroup ? -1 : 1;
break;
case 'n':
table ['\n'] = negativeGroup ? -1 : 1;
break;
case 'p':
readUnicodeGroup = true;
break;
default:
lastChar = ch;
hasLast = true;
PushLastChar();
break;
}
escape = false;
break;
}
if (wordBuilder != null)
{
wordBuilder.Append(ch);
subClass.Push(ch);
break;
}
if (!hasLast)
{
lastChar = ch;
hasLast = true;
break;
}
if (range)
{
for (int i = (int)lastChar; i <= (int)ch; i++)
{
table [i] = negativeGroup ? -1 : 1;
}
hasLast = false;
}
else
{
PushLastChar();
lastChar = ch;
hasLast = true;
}
range = false;
break;
}
first = false;
lastPushedChar = ch;
}