godot/drivers/nrex/regex.cpp

/*************************************************************************/
/*  regex.cpp                                                            */
/*************************************************************************/
/*                       This file is part of:                           */
/*                           GODOT ENGINE                                */
/*                    http://www.godotengine.org                         */
/*************************************************************************/
/* Copyright (c) 2007-2016 Juan Linietsky, Ariel Manzur.                 */
/*                                                                       */
/* Permission is hereby granted, free of charge, to any person obtaining */
/* a copy of this software and associated documentation files (the       */
/* "Software"), to deal in the Software without restriction, including   */
/* without limitation the rights to use, copy, modify, merge, publish,   */
/* distribute, sublicense, and/or sell copies of the Software, and to    */
/* permit persons to whom the Software is furnished to do so, subject to */
/* the following conditions:                                             */
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/* The above copyright notice and this permission notice shall be        */
/* included in all copies or substantial portions of the Software.       */
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/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,       */
/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF    */
/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
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/*************************************************************************/
#include "regex.h"
#include "nrex.hpp"
#include "core/os/memory.h"

void RegEx::_bind_methods() {

	ObjectTypeDB::bind_method(_MD("compile","pattern", "capture"),&RegEx::compile, DEFVAL(9));
	ObjectTypeDB::bind_method(_MD("find","text","start","end"),&RegEx::find, DEFVAL(0), DEFVAL(-1));
	ObjectTypeDB::bind_method(_MD("clear"),&RegEx::clear);
	ObjectTypeDB::bind_method(_MD("is_valid"),&RegEx::is_valid);
	ObjectTypeDB::bind_method(_MD("get_capture_count"),&RegEx::get_capture_count);
	ObjectTypeDB::bind_method(_MD("get_capture","capture"),&RegEx::get_capture);
	ObjectTypeDB::bind_method(_MD("get_capture_start","capture"),&RegEx::get_capture_start);
	ObjectTypeDB::bind_method(_MD("get_captures"),&RegEx::_bind_get_captures);

};

StringArray RegEx::_bind_get_captures() 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 {

	ERR_FAIL_COND_V( !exp.valid(), 0 );

	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);

}

int RegEx::get_capture_start(int capture) const {

	ERR_FAIL_COND_V( get_capture_count() <= capture, -1 );

	return captures[capture].start;

}

Error RegEx::compile(const String& p_pattern, int capture) {

	clear();

	exp.compile(p_pattern.c_str(), capture);

	ERR_FAIL_COND_V( !exp.valid(), FAILED );

	captures.resize(exp.capture_size());

	return OK;

};

int RegEx::find(const String& p_text, int p_start, int p_end) const {

	ERR_FAIL_COND_V( !exp.valid(), -1 );
	ERR_FAIL_COND_V( p_text.length() < p_start, -1 );
	ERR_FAIL_COND_V( p_text.length() < p_end, -1 );

	bool res = exp.match(p_text.c_str(), &captures[0], p_start, p_end);

	if (res) {
		text = p_text;
		return captures[0].start;
	}
	text.clear();
	return -1;

};

RegEx::RegEx(const String& p_pattern) {

	compile(p_pattern);

};

RegEx::RegEx() {

};

RegEx::~RegEx() {

	clear();

};