Regex library Nrex initial port

drivers/nrex/regex.cpp

@@ -0,0 +1,112 @@
+/*************************************************/
+/*  regex.cpp                                    */
+/*************************************************/
+/*            This file is part of:              */
+/*                GODOT ENGINE                   */
+/*************************************************/
+/*       Source code within this file is:        */
+/*  (c) 2007-2010 Juan Linietsky, Ariel Manzur   */
+/*             All Rights Reserved.              */
+/*************************************************/
+
+#include "regex.h"
+#include "nrex.hpp"
+#include "core/os/memory.h"
+
+void RegEx::_bind_methods() {
+
+	ObjectTypeDB::bind_method(_MD("compile","pattern"),&RegEx::compile);
+	ObjectTypeDB::bind_method(_MD("match","text","start","end"),&RegEx::match, DEFVAL(0), DEFVAL(-1));
+	ObjectTypeDB::bind_method(_MD("get_capture","capture"),&RegEx::get_capture);
+	ObjectTypeDB::bind_method(_MD("get_capture_list"),&RegEx::_bind_get_capture_list);
+
+};
+
+StringArray RegEx::_bind_get_capture_list() const {
+
+	StringArray ret;
+	int count = get_capture_count();
+	for (int i=0; i<count; i++) {
+
+		String c = get_capture(i);
+		ret.push_back(c);
+	};
+
+	return ret;
+
+};
+
+void RegEx::clear() {
+
+	text.clear();
+	captures.clear();
+	exp.reset();
+
+};
+
+bool RegEx::is_valid() const {
+
+	return exp.valid();
+
+};
+
+int RegEx::get_capture_count() const {
+	
+	return exp.capture_size();
+}
+
+String RegEx::get_capture(int capture) const {
+
+	ERR_FAIL_COND_V( get_capture_count() <= capture, String() );
+
+	return text.substr(captures[capture].start, captures[capture].length);
+
+}
+
+Error RegEx::compile(const String& p_pattern) {
+	
+	clear();
+
+	exp.compile(p_pattern.c_str());
+
+	ERR_FAIL_COND_V( !exp.valid(), FAILED );
+	
+	captures.resize(exp.capture_size());
+
+	return OK;
+
+};
+
+bool RegEx::match(const String& p_text, int p_start, int p_end) const {
+
+	
+	ERR_FAIL_COND_V( !exp.valid(), false );
+	ERR_FAIL_COND_V( p_text.length() < p_start, false );
+	ERR_FAIL_COND_V( p_text.length() < p_end, false );
+
+	bool res = exp.match(p_text.c_str(), &captures[0], p_start, p_end);
+
+	if (res) {
+		text = p_text;
+		return true;
+	}
+	text.clear();
+	return false;
+
+};
+
+RegEx::RegEx(const String& p_pattern) {
+
+	compile(p_pattern);
+
+};
+
+RegEx::RegEx() {
+
+};
+
+RegEx::~RegEx() {
+
+	clear();
+
+};