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/*
* Copyright (C)2005-2017 Haxe Foundation
*
* 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:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* 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. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
* DEALINGS IN THE SOFTWARE.
*/
import lua.lib.lrexlib.Rex;
import lua.Table;
import lua.Lib;
import lua.NativeStringTools;
@:coreApi
class EReg {
var r : Rex; // the Rex extern instance.
var global : Bool; // whether the regex is in global mode.
var s : String; // the last matched string
var m : Table<Int,Int>; // the [start:Int, end:Int, and submatches:String (matched groups)] as a single table.
static var FLAGS : Table<String,Int> = Rex.flags();
public function new( r : String, opt : String ) : Void {
var ropt = 0;
for (i in 0...opt.length){
switch(opt.charAt(i)){
case "i" : ropt |= FLAGS.CASELESS;
case "m" : ropt |= FLAGS.MULTILINE;
case "s" : ropt |= FLAGS.DOTALL;
case "u" : ropt |= FLAGS.UTF8;
case "g" : global = true;
default : null;
}
}
if (global == null) global = false;
this.r = Rex.create(r, ropt);
}
public function match( s : String ) : Bool {
if (s == null) return false;
this.m = lua.TableTools.pack(r.exec(s));
this.s = s;
return m[1] != null;
}
public function matched( n : Int ) : String {
if (m[1] == null || n < 0) throw "EReg::matched";
else if (n == 0) {
var k = NativeStringTools.sub(s, m[1], m[2]).match;
return k;
} else if (Std.is(m[3], lua.Table)){
var mn = 2 * (n - 1);
if (Std.is(untyped m[3][mn+1], Bool)) return null;
return NativeStringTools.sub(s, untyped m[3][mn + 1], untyped m[3][mn + 2]).match;
} else {
throw "EReg:matched";
}
}
public function matchedLeft() : String {
if( m[1] == null ) throw "No string matched";
return NativeStringTools.sub(s, 1, m[1]-1).match;
}
public function matchedRight() : String {
if( m[1] == null ) throw "No string matched";
return NativeStringTools.sub(s, m[2]+1).match;
}
public function matchedPos() : { pos : Int, len : Int } {
if( m[1] == null ) throw "No string matched";
return {
pos : m[1]-1,
len : m[2]-m[1]+ 1
}
}
public function matchSub( s : String, pos : Int, len : Int = -1):Bool {
var ss = s.substr(0, len < 0 ? s.length : pos + len);
if (global){
m = lua.TableTools.pack(r.exec(ss, pos + 1));
var b = m[1] != null;
if (b){
this.s = s;
}
return b;
} else {
m = lua.TableTools.pack(r.exec(ss, pos + 1));
var b = m[1] != null;
if (b){
this.s = s;
}
return b;
}
}
public function split( s : String ) : Array<String> {
if (global){
return Lib.fillArray(Rex.split(s, r));
} else {
// we can't use directly Rex.split because it's ignoring the 'g' flag
var d = "#__delim__#";
return Lib.fillArray(Rex.split(replace(s,d), d));
}
}
public function replace( s : String, by : String ) : String {
by = Rex.gsub(by, "\\$(\\d)", "%%%1"); // convert dollar sign matched groups to Rex equivalent
by = Rex.gsub(by, "\\${2}", "$"); // escape double dollar signs
return Rex.gsub(s,r,by, global ? null : 1);
}
public function map( s : String, f : EReg -> String ) : String {
var offset = 0;
var buf = new StringBuf();
do {
if (offset >= s.length){
break;
}
else if (!matchSub(s, offset)) {
buf.add(s.substr(offset));
break;
}
var p = matchedPos();
buf.add(s.substr(offset, p.pos - offset));
buf.add(f(this));
if (p.len == 0) {
buf.add(s.substr(p.pos, 1));
offset = p.pos + 1;
}
else
offset = p.pos + p.len;
} while (global);
if (!global && offset > 0 && offset < s.length)
buf.add(s.substr(offset));
return buf.toString();
}
static function __init__() : Void {
if (Rex == null){
throw "Rex is missing. Please install lrexlib-pcre.";
}
}
}
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