88 lines
2.0 KiB
Swift
88 lines
2.0 KiB
Swift
//
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// Regex.swift
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// SwifSoup
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//
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// Created by Nabil Chatbi on 08/10/16.
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// Copyright © 2016 Nabil Chatbi.. All rights reserved.
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//
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import Foundation
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#if !os(Linux)
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extension NSTextCheckingResult {
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func range(at idx: Int) -> NSRange {
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return rangeAt(idx)
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}
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}
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#endif
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public struct Pattern {
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public static let CASE_INSENSITIVE: Int = 0x02
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let pattern: String
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init(_ pattern: String) {
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self.pattern = pattern
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}
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static public func compile(_ s: String) -> Pattern {
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return Pattern(s)
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}
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static public func compile(_ s: String, _ op: Int) -> Pattern {
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return Pattern(s)
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}
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func validate()throws {
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_ = try NCRegularExpression(pattern: self.pattern, options:[])
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}
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func matcher(in text: String) -> Matcher {
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do {
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let regex = try NCRegularExpression(pattern: self.pattern, options:[])
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let nsString = NSString(string: text)
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let results = regex.matches(in: text, options:[], range: NSRange(location: 0, length: nsString.length))
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return Matcher(results, text)
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} catch let error {
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print("invalid regex: \(error.localizedDescription)")
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return Matcher([], text)
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}
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}
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public func toString() -> String {
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return pattern
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}
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}
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public class Matcher {
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let matches: [NCTextCheckingResult]
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let string: String
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var index: Int = -1
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public var count: Int { return matches.count}
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init(_ m: [NCTextCheckingResult], _ s: String) {
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matches = m
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string = s
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}
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@discardableResult
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public func find() -> Bool {
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index += 1
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if(index < matches.count) {
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return true
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}
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return false
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}
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public func group(_ i: Int) -> String? {
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let b = matches[index]
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let c = b.range(at:i)
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if(c.location == NSNotFound) {return nil}
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let result = string.substring(c.location, c.length)
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return result
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}
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public func group() -> String? {
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return group(0)
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}
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}
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