content: /*
   * Copyright 1999-2101 Alibaba Group.
   *
   * Licensed under the Apache License, Version 2.0 (the "License");
   * you may not use this file except in compliance with the License.
   * You may obtain a copy of the License at
   *
   *      http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  package com.alibaba.fastjson.parser;
  
  /**
   * @author wenshao<szujobs@hotmail.com>
   */
  public final class CharTypes {
      public final static char[] digits = {
          '0' , '1' , '2' , '3' , '4' , '5' ,
          '6' , '7' , '8' , '9' , 'A' , 'B' ,
          'C' , 'D' , 'E' , 'F'
      };
      
      public final static boolean[] firstIdentifierFlags       = new boolean[256];
      static {
          for (char c = 0; c < firstIdentifierFlags.length; ++c) {
              if (c >= 'A' && c <= 'Z') {
                  firstIdentifierFlags[c] = true;
              } else if (c >= 'a' && c <= 'z') {
                  firstIdentifierFlags[c] = true;
              } else if (c == '_') {
                  firstIdentifierFlags[c] = true;
              }
          }
      }
  
      public final static boolean[] identifierFlags            = new boolean[256];
  
      static {
          for (char c = 0; c < identifierFlags.length; ++c) {
              if (c >= 'A' && c <= 'Z') {
                  identifierFlags[c] = true;
              } else if (c >= 'a' && c <= 'z') {
                  identifierFlags[c] = true;
              } else if (c == '_') {
                  identifierFlags[c] = true;
              } else if (c >= '0' && c <= '9') {
                  identifierFlags[c] = true;
              }
          }
      }
  
      public final static boolean[] specicalFlags_doubleQuotes = new boolean[128];
      public final static boolean[] specicalFlags_singleQuotes = new boolean[128];
  
      public static boolean isSpecial_doubleQuotes(char ch) {
          return ch < specicalFlags_doubleQuotes.length && specicalFlags_doubleQuotes[ch];
      }
  
      public final static char[] replaceChars = new char[128];
      static {
          specicalFlags_doubleQuotes['\b'] = true;
          specicalFlags_doubleQuotes['\n'] = true;
          specicalFlags_doubleQuotes['\f'] = true;
          specicalFlags_doubleQuotes['\r'] = true;
          specicalFlags_doubleQuotes['\"'] = true;
          specicalFlags_doubleQuotes['\\'] = true;
          specicalFlags_doubleQuotes['\u000B'] = true;
  
          specicalFlags_singleQuotes['\b'] = true;
          specicalFlags_singleQuotes['\n'] = true;
          specicalFlags_singleQuotes['\f'] = true;
          specicalFlags_singleQuotes['\r'] = true;
          specicalFlags_singleQuotes['\''] = true;
          specicalFlags_singleQuotes['\\'] = true;
          specicalFlags_singleQuotes['\u000B'] = true;
          
          replaceChars['\b'] = 'b';
          replaceChars['\n'] = 'n';
          replaceChars['\f'] = 'f';
          replaceChars['\r'] = 'r';
          replaceChars['\"'] = '"';
          replaceChars['\''] = '\'';
          replaceChars['\\'] = '\\';
          replaceChars['\t'] = 't';
          replaceChars['/'] = '/';
          replaceChars['\u000B'] = 'v';
      }
  
      public final static char [] ASCII_CHARS = {
                                        '0', '0', '0', '1', '0', '2', '0', '3', 
                                        '0', '4', '0', '5', '0', '6', '0', '7', 
                                        '0', '8', '0', '9', '0', 'A', '0', 'B',
                                        '0', 'C', '0', 'D', '0', 'E', '0', 'F',
                                        '1', '0', '1', '1', '1', '2', '1', '3', 
                                        '1', '4', '1', '5', '1', '6', '1', '7', 
                                        '1', '8', '1', '9', '1', 'A', '1', 'B',
                                        '1', 'C', '1', 'D', '1', 'E', '1', 'F',
                                        '2', '0', '2', '1', '2', '2', '2', '3', 
                                        '2', '4', '2', '5', '2', '6', '2', '7', 
                                        '2', '8', '2', '9', '2', 'A', '2', 'B',
                                        '2', 'C', '2', 'D', '2', 'E', '2', 'F',
                                        } ; 
      
      public final static boolean isEmoji(char ch) {
          if (ch >= '\uE001' && ch <= '\uE05A') {
              return true;
          }
          
          if (ch >= '\uE101' && ch <= '\uE15A') {
              return true;
          }
          
          if (ch >= '\uE201' && ch <= '\uE253') {
              return true;
          }
          
          if (ch >= '\uE401' && ch <= '\uE44C') {
              return true;
          }
          
          if (ch >= '\uE501' && ch <= '\uE537') {
              return true;
          }
          
          return false;
      }
  }
  