content: /*
   *  This file is part of AndroidIDE.
   *
   *  AndroidIDE is free software: you can redistribute it and/or modify
   *  it under the terms of the GNU General Public License as published by
   *  the Free Software Foundation, either version 3 of the License, or
   *  (at your option) any later version.
   *
   *  AndroidIDE is distributed in the hope that it will be useful,
   *  but WITHOUT ANY WARRANTY; without even the implied warranty of
   *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   *  GNU General Public License for more details.
   *
   *  You should have received a copy of the GNU General Public License
   *   along with AndroidIDE.  If not, see <https://www.gnu.org/licenses/>.
   */
  
  package com.itsaky.androidide.inflater.vectormaster.utilities.parser;
  
  /*
  
     Licensed to the Apache Software Foundation (ASF) under one or more
     contributor license agreements.  See the NOTICE file distributed with
     this work for additional information regarding copyright ownership.
     The ASF licenses this file to You 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.
  
     Changes Copyright 2011 Google Inc.
  */
  
  /**
   * Parses numbers from SVG text. Based on the Batik Number Parser (Apache 2 License).
   *
   * @author Apache Software Foundation, Larva Labs LLC
   */
  class ParserHelper {
  
    /** Array of powers of ten. Using double instead of float gives a tiny bit more precision. */
    private static final double[] pow10 = new double[128];
  
    static {
      for (int i = 0; i < pow10.length; i++) {
        pow10[i] = Math.pow(10, i);
      }
    }
  
    private final CharSequence s;
    private final int n;
    public int pos;
    private char current;
  
    public ParserHelper(CharSequence s) {
      this.s = s;
      this.pos = 0;
      n = s.length();
      current = s.charAt(pos);
    }
  
    // Computes a float from mantissa and exponent.
    private static float buildFloat(int mant, int exp) {
      if (exp < -125 || mant == 0) {
        return 0.0f;
      }
  
      if (exp >= 128) {
        return (mant > 0) ? Float.POSITIVE_INFINITY : Float.NEGATIVE_INFINITY;
      }
  
      if (exp == 0) {
        return mant;
      }
  
      if (mant >= (1 << 26)) {
        mant++; // round up trailing bits if they will be dropped.
      }
  
      return (float) ((exp > 0) ? mant * pow10[exp] : mant / pow10[-exp]);
    }
  
    public void skipWhitespace() {
      while (pos < n) {
        if (Character.isWhitespace(s.charAt(pos))) {
          advance();
        } else {
          break;
        }
      }
    }
  
    public void advance() {
      current = read();
    }
  
    public float nextFloat() {
      skipWhitespace();
      float f = parseFloat();
      skipNumberSeparator();
      return f;
    }
  
    private char read() {
      if (pos < n) {
        pos++;
      }
      if (pos == n) {
        return '\0';
      } else {
        return s.charAt(pos);
      }
    }
  
    private void reportUnexpectedCharacterError(char c) {
      throw new RuntimeException("Unexpected char '" + c + "'.");
    }
  
    void skipNumberSeparator() {
      while (pos < n) {
        char c = s.charAt(pos);
        switch (c) {
          case ' ':
          case ',':
          case '\n':
          case '\t':
            advance();
            break;
          default:
            return;
        }
      }
    }
  
    // Parses the content of the buffer and converts it to a float.
    float parseFloat() {
      int mant = 0;
      int mantDig = 0;
      boolean mantPos = true;
      boolean mantRead = false;
  
      int exp = 0;
      int expDig = 0;
      int expAdj = 0;
      boolean expPos = true;
  
      switch (current) {
        case '-':
          mantPos = false;
          // fallthrough
        case '+':
          current = read();
      }
      m1:
      switch (current) {
        default:
          return Float.NaN;
  
        case '.':
          break;
  
        case '0':
          mantRead = true;
          l:
          for (; ; ) {
            current = read();
            switch (current) {
              case '1':
              case '2':
              case '3':
              case '4':
              case '5':
              case '6':
              case '7':
              case '8':
              case '9':
                break l;
              case '.':
              case 'e':
              case 'E':
                break m1;
              default:
                return 0.0f;
              case '0':
            }
          }
  
        case '1':
        case '2':
        case '3':
        case '4':
        case '5':
        case '6':
        case '7':
        case '8':
        case '9':
          mantRead = true;
          l:
          for (; ; ) {
            if (mantDig < 9) {
              mantDig++;
              mant = mant * 10 + (current - '0');
            } else {
              expAdj++;
            }
            current = read();
            switch (current) {
              default:
                break l;
              case '0':
              case '1':
              case '2':
              case '3':
              case '4':
              case '5':
              case '6':
              case '7':
              case '8':
              case '9':
            }
          }
      }
  
      if (current == '.') {
        current = read();
        m2:
        switch (current) {
          default:
          case 'e':
          case 'E':
            if (!mantRead) {
              reportUnexpectedCharacterError(current);
              return 0.0f;
            }
            break;
  
          case '0':
            if (mantDig == 0) {
              l:
              for (; ; ) {
                current = read();
                expAdj--;
                switch (current) {
                  case '1':
                  case '2':
                  case '3':
                  case '4':
                  case '5':
                  case '6':
                  case '7':
                  case '8':
                  case '9':
                    break l;
                  default:
                    if (!mantRead) {
                      return 0.0f;
                    }
                    break m2;
                  case '0':
                }
              }
            }
          case '1':
          case '2':
          case '3':
          case '4':
          case '5':
          case '6':
          case '7':
          case '8':
          case '9':
            l:
            for (; ; ) {
              if (mantDig < 9) {
                mantDig++;
                mant = mant * 10 + (current - '0');
                expAdj--;
              }
              current = read();
              switch (current) {
                default:
                  break l;
                case '0':
                case '1':
                case '2':
                case '3':
                case '4':
                case '5':
                case '6':
                case '7':
                case '8':
                case '9':
              }
            }
        }
      }
  
      switch (current) {
        case 'e':
        case 'E':
          current = read();
          switch (current) {
            default:
              reportUnexpectedCharacterError(current);
              return 0f;
            case '-':
              expPos = false;
            case '+':
              current = read();
              switch (current) {
                default:
                  reportUnexpectedCharacterError(current);
                  return 0f;
                case '0':
                case '1':
                case '2':
                case '3':
                case '4':
                case '5':
                case '6':
                case '7':
                case '8':
                case '9':
              }
            case '0':
            case '1':
            case '2':
            case '3':
            case '4':
            case '5':
            case '6':
            case '7':
            case '8':
            case '9':
          }
  
          en:
          switch (current) {
            case '0':
              l:
              for (; ; ) {
                current = read();
                switch (current) {
                  case '1':
                  case '2':
                  case '3':
                  case '4':
                  case '5':
                  case '6':
                  case '7':
                  case '8':
                  case '9':
                    break l;
                  default:
                    break en;
                  case '0':
                }
              }
  
            case '1':
            case '2':
            case '3':
            case '4':
            case '5':
            case '6':
            case '7':
            case '8':
            case '9':
              l:
              for (; ; ) {
                if (expDig < 3) {
                  expDig++;
                  exp = exp * 10 + (current - '0');
                }
                current = read();
                switch (current) {
                  default:
                    break l;
                  case '0':
                  case '1':
                  case '2':
                  case '3':
                  case '4':
                  case '5':
                  case '6':
                  case '7':
                  case '8':
                  case '9':
                }
              }
          }
        default:
      }
  
      if (!expPos) {
        exp = -exp;
      }
      exp += expAdj;
      if (!mantPos) {
        mant = -mant;
      }
  
      return buildFloat(mant, exp);
    }
  }
  