/// <summary>
/// Generate c++ matcher code for the given regex. Returns the empty string if the compilation fails.
/// </summary>
/// <param name="regex">given regex</param>
/// <param name="timeout">timeout in ms, 0 means no timeout and is the default</param>
public static string GenerateCpp(this Regex regex, int timeout = 0)
{
var brexman = new BREXManager("Matcher", "FString", 0, timeout);
var brex = brexman.MkRegex(regex.ToString(), regex.Options);
if (!brex.CanBeOptimized())
{
return(string.Empty);
}
brexman.AddBoolRegExp(brex);
var cpp = brexman.GenerateCpp();
return(cpp);
}
/// <summary>
/// Attempts to compile the regex to the given automaton interface or returns null if the compilation attempt fails.
/// </summary>
/// <param name="regex">the regex</param>
/// <param name="timeout">given compilation timeout in ms</param>
public static ICompiledStringMatcher Compile(this Regex regex, int timeout = 0)
{
var brexman = new BREXManager("Matcher", "FString", 0, timeout);
var brex = brexman.MkRegex(regex.ToString(), regex.Options);
if (!brex.CanBeOptimized())
{
return(null);
}
var aut = brex.Optimize();
return(aut.Compile());
}
/// <summary>
/// Construct a literal automaton
/// </summary>
internal BREXRegex(BREXManager manager, string pattern, RegexOptions options = RegexOptions.None)
{
this.manager = manager;
this.automaton = null;
this.regex = new Tuple <string, RegexOptions>(pattern, options);
}
/// <summary>
/// Construct a literal automaton
/// </summary>
internal BREXLike(BREXManager manager, string pattern, char escape)
{
this.manager = manager;
this.automaton = null;
this.like = new Tuple <string, char>(pattern, escape);
}