gt:             if (c == delimiter || c == 0 || c == '\n' || c == '\r') {
context: package org.json;
  
  import java.io.*;
  
  /*
  Copyright (c) 2002 JSON.org
  
  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 shall be used for Good, not Evil.
  
  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.
  */
  
  /**
   * A JSONTokener takes a source string and extracts characters and tokens from
   * it. It is used by the JSONObject and JSONArray constructors to parse
   * JSON source strings.
   * @author JSON.org
   * @version 2014-05-03
   */
  public class JSONTokener {
  
      private long    character;
      private boolean eof;
      private long    index;
      private long    line;
      private char    previous;
      private Reader  reader;
      private boolean usePrevious;
  
  
      /**
       * Construct a JSONTokener from a Reader.
       *
       * @param reader     A reader.
       */
      public JSONTokener(Reader reader) {
          this.reader = reader.markSupported()
              ? reader
              : new BufferedReader(reader);
          this.eof = false;
          this.usePrevious = false;
          this.previous = 0;
          this.index = 0;
          this.character = 1;
          this.line = 1;
      }
  
  
      /**
       * Construct a JSONTokener from an InputStream.
       * @param inputStream The source.
       */
      public JSONTokener(InputStream inputStream) {
          this(new InputStreamReader(inputStream));
      }
  
  
      /**
       * Construct a JSONTokener from a string.
       *
       * @param s     A source string.
       */
      public JSONTokener(String s) {
          this(new StringReader(s));
      }
  
  
      /**
       * Back up one character. This provides a sort of lookahead capability,
       * so that you can test for a digit or letter before attempting to parse
       * the next number or identifier.
       * @throws JSONException Thrown if trying to step back more than 1 step
       *  or if already at the start of the string
       */
      public void back() throws JSONException {
          if (this.usePrevious || this.index <= 0) {
              throw new JSONException("Stepping back two steps is not supported");
          }
          this.index -= 1;
          this.character -= 1;
          this.usePrevious = true;
          this.eof = false;
      }
  
  
      /**
       * Get the hex value of a character (base16).
       * @param c A character between '0' and '9' or between 'A' and 'F' or
       * between 'a' and 'f'.
       * @return  An int between 0 and 15, or -1 if c was not a hex digit.
       */
      public static int dehexchar(char c) {
          if (c >= '0' && c <= '9') {
              return c - '0';
          }
          if (c >= 'A' && c <= 'F') {
              return c - ('A' - 10);
          }
          if (c >= 'a' && c <= 'f') {
              return c - ('a' - 10);
          }
          return -1;
      }
  
      /**
       * @return true if at the end of the file and we didn't step back
       */
      public boolean end() {
          return this.eof && !this.usePrevious;
      }
  
  
      /**
       * Determine if the source string still contains characters that next()
       * can consume.
       * @return true if not yet at the end of the source.
       * @throws JSONException thrown if there is an error stepping forward
       *  or backward while checking for more data.
       */
      public boolean more() throws JSONException {
          this.next();
          if (this.end()) {
              return false;
          }
          this.back();
          return true;
      }
  
  
      /**
       * Get the next character in the source string.
       *
       * @return The next character, or 0 if past the end of the source string.
       * @throws JSONException Thrown if there is an error reading the source string.
       */
      public char next() throws JSONException {
          int c;
          if (this.usePrevious) {
              this.usePrevious = false;
              c = this.previous;
          } else {
              try {
                  c = this.reader.read();
              } catch (IOException exception) {
                  throw new JSONException(exception);
              }
  
              if (c <= 0) { // End of stream
                  this.eof = true;
                  c = 0;
              }
          }
          this.index += 1;
          if (this.previous == '\r') {
              this.line += 1;
              this.character = c == '\n' ? 0 : 1;
          } else if (c == '\n') {
              this.line += 1;
              this.character = 0;
          } else {
              this.character += 1;
          }
          this.previous = (char) c;
          return this.previous;
      }
  
  
      /**
       * Consume the next character, and check that it matches a specified
       * character.
       * @param c The character to match.
       * @return The character.
       * @throws JSONException if the character does not match.
       */
      public char next(char c) throws JSONException {
          char n = this.next();
          if (n != c) {
              throw this.syntaxError("Expected '" + c + "' and instead saw '" +
                      n + "'");
          }
          return n;
      }
  
  
      /**
       * Get the next n characters.
       *
       * @param n     The number of characters to take.
       * @return      A string of n characters.
       * @throws JSONException
       *   Substring bounds error if there are not
       *   n characters remaining in the source string.
       */
       public String next(int n) throws JSONException {
           if (n == 0) {
               return "";
           }
  
           char[] chars = new char[n];
           int pos = 0;
  
           while (pos < n) {
               chars[pos] = this.next();
               if (this.end()) {
                   throw this.syntaxError("Substring bounds error");
               }
               pos += 1;
           }
           return new String(chars);
       }
  
  
      /**
       * Get the next char in the string, skipping whitespace.
       * @throws JSONException Thrown if there is an error reading the source string.
       * @return  A character, or 0 if there are no more characters.
       */
      public char nextClean() throws JSONException {
          for (;;) {
              char c = this.next();
              if (c == 0 || c > ' ') {
                  return c;
              }
          }
      }
  
  
      /**
       * Return the characters up to the next close quote character.
       * Backslash processing is done. The formal JSON format does not
       * allow strings in single quotes, but an implementation is allowed to
       * accept them.
       * @param quote The quoting character, either
       *      <code>"</code>&nbsp;<small>(double quote)</small> or
       *      <code>'</code>&nbsp;<small>(single quote)</small>.
       * @return      A String.
       * @throws JSONException Unterminated string.
       */
      public String nextString(char quote) throws JSONException {
          char c;
          StringBuilder sb = new StringBuilder();
          for (;;) {
              c = this.next();
              switch (c) {
              case 0:
              case '\n':
              case '\r':
                  throw this.syntaxError("Unterminated string");
              case '\\':
                  c = this.next();
                  switch (c) {
                  case 'b':
                      sb.append('\b');
                      break;
                  case 't':
                      sb.append('\t');
                      break;
                  case 'n':
                      sb.append('\n');
                      break;
                  case 'f':
                      sb.append('\f');
                      break;
                  case 'r':
                      sb.append('\r');
                      break;
                  case 'u':
                      try {
                          sb.append((char)Integer.parseInt(this.next(4), 16));
                      } catch (NumberFormatException e) {
                          throw this.syntaxError("Illegal escape.", e);
                      }
                      break;
                  case '"':
                  case '\'':
                  case '\\':
                  case '/':
                      sb.append(c);
                      break;
                  default:
                      throw this.syntaxError("Illegal escape.");
                  }
                  break;
              default:
                  if (c == quote) {
                      return sb.toString();
                  }
                  sb.append(c);
              }
          }
      }
  
  
      /**
       * Get the text up but not including the specified character or the
       * end of line, whichever comes first.
       * @param  delimiter A delimiter character.
       * @return   A string.
       * @throws JSONException Thrown if there is an error while searching
       *  for the delimiter
       */
      public String nextTo(char delimiter) throws JSONException {
          StringBuilder sb = new StringBuilder();
          for (;;) {
              char c = this.next();
  