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comparison Implab/Formats/CharMap.cs @ 228:6fa235c5a760 v2

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Rewritten JsonScanner, JsonParser, fixed naming style
author cin
date Tue, 12 Sep 2017 01:19:12 +0300
parents
children 302ca905c19e
comparison
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227:8d5de4eb9c2c 228:6fa235c5a760
1 using Implab.Automaton;
2 using System;
3 using System.Collections.Generic;
4 using System.Linq;
5 using System.Runtime.CompilerServices;
6 using System.Text;
7 using System.Threading.Tasks;
8
9 namespace Implab.Formats {
10 public class CharMap : IAlphabet<char> {
11 readonly char m_min;
12 readonly char m_max;
13 readonly int[] m_map;
14
15 public CharMap(char min, int[] map) {
16 Safe.ArgumentNotNull(map, nameof(map));
17 Count = map.Max()+1;
18 m_min = min;
19 m_map = map;
20 m_max = (char)(min + map.Length);
21 }
22
23 public int Count {
24 get; private set;
25 }
26
27 public bool Contains(char symbol) {
28 return symbol >= m_min && symbol <= m_max && m_map[symbol-m_min] != AutomatonConst.UNCLASSIFIED_INPUT;
29 }
30
31 public IEnumerable<char> GetSymbols(int cls) {
32 for (var i = 0; i < m_map.Length; i++)
33 if (m_map[i] == cls)
34 yield return (char)(i + m_min);
35 }
36
37 [MethodImpl(MethodImplOptions.AggressiveInlining)]
38 public int Translate(char symbol) {
39 return symbol >= m_min && symbol <= m_max ? m_map[symbol-m_min] : AutomatonConst.UNCLASSIFIED_INPUT;
40 }
41 }
42 }