/*
* This is the only function that should be called from outside.
* It takes a RegexTree and creates a corresponding RegexCode.
*/
internal static RegexCode Write(RegexTree t)
{
RegexWriter w = new RegexWriter();
RegexCode retval = w.RegexCodeFromRegexTree(t);
#if DBG
if (t.Debug)
{
t.Dump();
retval.Dump();
}
#endif
return(retval);
}
/*
* Emits a one-argument operation.
*/
internal void Emit(int op, int opd1)
{
if (_counting)
{
_count += 2;
if (RegexCode.OpcodeBacktracks(op))
{
_trackcount += 1;
}
return;
}
_emitted[_curpos++] = op;
_emitted[_curpos++] = opd1;
}
private Regex(String pattern, RegexOptions options, bool useCache)
{
RegexTree tree;
CachedCodeEntry cached = null;
string cultureKey = null;
if (pattern == null)
{
throw new ArgumentNullException("pattern");
}
if (options < RegexOptions.None || (((int)options) >> MaxOptionShift) != 0)
{
throw new ArgumentOutOfRangeException("options");
}
if ((options & RegexOptions.ECMAScript) != 0 &&
(options & ~(RegexOptions.ECMAScript |
RegexOptions.IgnoreCase |
RegexOptions.Multiline |
RegexOptions.Compiled |
RegexOptions.CultureInvariant |
RegexOptions.Timeboxed
#if DBG
| RegexOptions.Debug
#endif
)) != 0)
{
throw new ArgumentOutOfRangeException("options");
}
// Try to look up this regex in the cache. We do this regardless of whether useCache is true since there's
// really no reason not to.
if ((options & RegexOptions.CultureInvariant) != 0)
{
cultureKey = CultureInfo.InvariantCulture.ThreeLetterWindowsLanguageName;
}
else
{
cultureKey = CultureInfo.CurrentCulture.ThreeLetterWindowsLanguageName;
}
String key = ((int)options).ToString(NumberFormatInfo.InvariantInfo) + ":" + cultureKey + ":" + pattern;
cached = LookupCachedAndUpdate(key);
this.pattern = pattern;
this.roptions = options;
if (cached == null)
{
// Parse the input
tree = RegexParser.Parse(pattern, roptions);
// Extract the relevant information
capnames = tree._capnames;
capslist = tree._capslist;
code = RegexWriter.Write(tree);
caps = code._caps;
capsize = code._capsize;
InitializeReferences();
tree = null;
if (useCache)
{
cached = CacheCode(key);
}
}
else
{
caps = cached._caps;
capnames = cached._capnames;
capslist = cached._capslist;
capsize = cached._capsize;
code = cached._code;
factory = cached._factory;
runnerref = cached._runnerref;
replref = cached._replref;
refsInitialized = true;
}
// if the compile option is set, then compile the code if it's not already
if (UseOptionC() && factory == null)
{
factory = Compile(code, roptions);
if (useCache && cached != null)
{
cached.AddCompiled(factory);
}
code = null;
}
if (UseOptionC())
{
runnerref = new ExclusiveReference();
runnerref.Release(factory.CreateInstance());
}
}
internal RegexRunnerFactory Compile(RegexCode code, RegexOptions roptions)
{
return(RegexCompiler.Compile(code, roptions));
}
internal void AddCompiled(RegexRunnerFactory factory)
{
_factory = factory;
_code = null;
}