mcs/class/Microsoft.VisualBasic/Microsoft.VisualBasic/Microsoft.VisualBasic.CompilerServices/IntegerType.cs

   1 //
   2 // IntegerType.cs
   3 //
   4 //      Author:
   5 //      Chris J Breisch (cjbreisch@altavista.net)
   6 //      Francesco Delfino (pluto@tipic.com)
   7 //      Dennis Hayes (dennish@raytek.com)
   8 //
   9 //      (C) copyright 2002 Chris J Breisch
  10 //      2002 Tipic, Inc (http://www.tipic.com)
  11 //
  12  /*
  13   * Copyright (c) 2002-2003 Mainsoft Corporation.
  14   * Copyright (C) 2004 Novell, Inc (http://www.novell.com)
  15   *
  16   * Permission is hereby granted, free of charge, to any person obtaining a
  17   * copy of this software and associated documentation files (the "Software"),
  18   * to deal in the Software without restriction, including without limitation
  19   * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  20   * and/or sell copies of the Software, and to permit persons to whom the
  21   * Software is furnished to do so, subject to the following conditions:
  22   *
  23   * The above copyright notice and this permission notice shall be included in
  24   * all copies or substantial portions of the Software.
  25   *
  26   * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  27   * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  28   * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  29   * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  30   * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  31   * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  32   * DEALINGS IN THE SOFTWARE.
  33   */
  34 using System;
  35 using System.ComponentModel;
  36 using Microsoft.VisualBasic;
  37
  38 namespace Microsoft.VisualBasic.CompilerServices
  39 {
  40         [StandardModule, EditorBrowsable(EditorBrowsableState.Never)]
  41         sealed public class IntegerType {
  42                 private IntegerType () {}
  43
  44                 // Methods
  45                 /**
  46                  * The method try to convert given string to int in a following way:
  47                  * 1. If input string is null return 0.
  48                  * 2. If input string represents number: return value of this number,
  49                  * @exception InvalidCastException - in case if number translation failed
  50                  * @param str - The string that converted to int
  51                  * @return int The value that extracted from the input string.
  52                  * @see Microsoft.VisualBasic.VBUtils#isNumber
  53                  */
  54                 public static System.Int32 FromString (string Value) {
  55                         if(Value == null)return 0;
  56
  57                         double[] lRes = new double[1];
  58                         //the following handles &H &O and other stuff. int.parse does not.
  59                         if (VBUtils.isNumber(Value, lRes)) {
  60                                 long val = (long)Math.Round(lRes[0]);
  61                                 if (val > Int32.MaxValue || val < Int32.MinValue)
  62                                         throw new OverflowException(
  63                                                 /*Environment.GetResourceString(*/"Overflow_Int32")/*)*/;
  64                                 return (int) val;
  65                         }
  66                         return 0;
  67                 }
  68
  69                 public static System.Int32 FromObject (object Value) {
  70                         if ((object)Value==null)return 0;
  71
  72                         if(Value is string)return FromString((string) Value);
  73
  74                         if(Value is int)return ((int)Value);
  75
  76                         return System.Convert.ToInt32(Value);
  77                 }
  78         };
  79 }