Version.cs source code in C# .NET

                        Code:
                         / FX-1434 / FX-1434 / 1.0 / untmp / whidbey / REDBITS / ndp / clr / src / BCL / System / Version.cs / 1 / Version.cs
                        
                        
                            // ==++== 
//
//   Copyright (c) Microsoft Corporation.  All rights reserved.
//
// ==--== 
/*============================================================
** 
** File:    Version 
**
** 
** Purpose:
**
**
===========================================================*/ 
namespace System {
 
    using CultureInfo = System.Globalization.CultureInfo; 

    // A Version object contains four hierarchical numeric components: major, minor, 
    // build and revision.  Build and revision may be unspecified, which is represented
    // internally as a -1.  By definition, an unspecified component matches anything
    // (both unspecified and specified), and an unspecified component is "less than" any
    // specified component. 

    [Serializable] 
[System.Runtime.InteropServices.ComVisible(true)] 
    public sealed class Version : ICloneable, IComparable
#if GENERICS_WORK 
        , IComparable, IEquatable
#endif
    {
        // AssemblyName depends on the order staying the same 
        private int _Major;
        private int _Minor; 
        private int _Build = -1; 
        private int _Revision = -1;
 
        public Version(int major, int minor, int build, int revision) {
            if (major < 0)
              throw new ArgumentOutOfRangeException("major",Environment.GetResourceString("ArgumentOutOfRange_Version"));
 
            if (minor < 0)
              throw new ArgumentOutOfRangeException("minor",Environment.GetResourceString("ArgumentOutOfRange_Version")); 
 
            if (build < 0)
              throw new ArgumentOutOfRangeException("build",Environment.GetResourceString("ArgumentOutOfRange_Version")); 

            if (revision < 0)
              throw new ArgumentOutOfRangeException("revision",Environment.GetResourceString("ArgumentOutOfRange_Version"));
 
            _Major = major;
            _Minor = minor; 
            _Build = build; 
            _Revision = revision;
        } 

        public Version(int major, int minor, int build) {
            if (major < 0)
                throw new ArgumentOutOfRangeException("major",Environment.GetResourceString("ArgumentOutOfRange_Version")); 

            if (minor < 0) 
              throw new ArgumentOutOfRangeException("minor",Environment.GetResourceString("ArgumentOutOfRange_Version")); 

            if (build < 0) 
              throw new ArgumentOutOfRangeException("build",Environment.GetResourceString("ArgumentOutOfRange_Version"));


            _Major = major; 
            _Minor = minor;
            _Build = build; 
        } 

        public Version(int major, int minor) { 
            if (major < 0)
                throw new ArgumentOutOfRangeException("major",Environment.GetResourceString("ArgumentOutOfRange_Version"));

            if (minor < 0) 
                throw new ArgumentOutOfRangeException("minor",Environment.GetResourceString("ArgumentOutOfRange_Version"));
 
            _Major = major; 
            _Minor = minor;
        } 

        public Version(String version) {
            if ((Object) version == null)
                throw new ArgumentNullException("version"); 

            String[] parsedComponents = version.Split(new char[] {'.'}); 
            int parsedComponentsLength = parsedComponents.Length; 
            if ((parsedComponentsLength < 2) || (parsedComponentsLength > 4)) throw new ArgumentException(Environment.GetResourceString("Arg_VersionString"));
            _Major = Int32.Parse(parsedComponents[0], CultureInfo.InvariantCulture); 
            if (_Major < 0)
              throw new ArgumentOutOfRangeException("version",Environment.GetResourceString("ArgumentOutOfRange_Version"));

            _Minor = Int32.Parse(parsedComponents[1], CultureInfo.InvariantCulture); 
            if (_Minor < 0)
              throw new ArgumentOutOfRangeException("version",Environment.GetResourceString("ArgumentOutOfRange_Version")); 
 
            parsedComponentsLength -= 2;
            if (parsedComponentsLength > 0) { 
                _Build = Int32.Parse(parsedComponents[2], CultureInfo.InvariantCulture);
                if (_Build < 0)
                  throw new ArgumentOutOfRangeException("build",Environment.GetResourceString("ArgumentOutOfRange_Version"));
 
                parsedComponentsLength--;
                if (parsedComponentsLength > 0) { 
                    _Revision = Int32.Parse(parsedComponents[3], CultureInfo.InvariantCulture); 
                    if (_Revision < 0)
                      throw new ArgumentOutOfRangeException("revision",Environment.GetResourceString("ArgumentOutOfRange_Version")); 
                }
            }
        }
 
        public Version()
        { 
            _Major = 0; 
            _Minor = 0;
        } 

        // Properties for setting and getting version numbers
        public int Major {
            get { return _Major; } 
        }
 
        public int Minor { 
            get { return _Minor; }
        } 

        public int Build {
            get { return _Build; }
        } 

        public int Revision { 
            get { return _Revision; } 
        }
 
        public short MajorRevision {
            get { return (short)(_Revision >> 16); }
        }
 
        public short MinorRevision {
            get { return (short)(_Revision & 0xFFFF); } 
        } 

        public Object Clone() { 
            Version v = new Version();
            v._Major = _Major;
            v._Minor = _Minor;
            v._Build = _Build; 
            v._Revision = _Revision;
            return(v); 
        } 

        public int CompareTo(Object version) 
        {
            if (version == null)
                return 1;
 
            Version v = version as Version;
            if (v == null) 
                throw new ArgumentException(Environment.GetResourceString("Arg_MustBeVersion")); 

            if (this._Major != v._Major) 
                if (this._Major > v._Major)
                    return 1;
                else
                    return -1; 

            if (this._Minor != v._Minor) 
                if (this._Minor > v._Minor) 
                    return 1;
                else 
                    return -1;

            if (this._Build != v._Build)
                if (this._Build > v._Build) 
                    return 1;
                else 
                    return -1; 

            if (this._Revision != v._Revision) 
                if (this._Revision > v._Revision)
                    return 1;
                else
                    return -1; 

            return 0; 
        } 

#if GENERICS_WORK 
        public int CompareTo(Version value)
        {
            if (value == null)
                return 1; 

            if (this._Major != value._Major) 
                if (this._Major > value._Major) 
                    return 1;
                else 
                    return -1;

            if (this._Minor != value._Minor)
                if (this._Minor > value._Minor) 
                    return 1;
                else 
                    return -1; 

            if (this._Build != value._Build) 
                if (this._Build > value._Build)
                    return 1;
                else
                    return -1; 

            if (this._Revision != value._Revision) 
                if (this._Revision > value._Revision) 
                    return 1;
                else 
                    return -1;

            return 0;
        } 
#endif
 
        public override bool Equals(Object obj) { 
            Version v = obj as Version;
            if (v == null) 
                return false;

            // check that major, minor, build & revision numbers match
            if ((this._Major != v._Major) || 
                (this._Minor != v._Minor) ||
                (this._Build != v._Build) || 
                (this._Revision != v._Revision)) 
                return false;
 
            return true;
        }

        public bool Equals(Version obj) 
        {
            if (obj == null) 
                return false; 

            // check that major, minor, build & revision numbers match 
            if ((this._Major != obj._Major) ||
                (this._Minor != obj._Minor) ||
                (this._Build != obj._Build) ||
                (this._Revision != obj._Revision)) 
                return false;
 
            return true; 
        }
 
        public override int GetHashCode()
        {
            // Let's assume that most version numbers will be pretty small and just
            // OR some lower order bits together. 

            int accumulator = 0; 
 
            accumulator |= (this._Major & 0x0000000F) << 28;
            accumulator |= (this._Minor & 0x000000FF) << 20; 
            accumulator |= (this._Build & 0x000000FF) << 12;
            accumulator |= (this._Revision & 0x00000FFF);

            return accumulator; 
        }
 
        public override String ToString() { 
            if (_Build == -1) return(ToString(2));
            if (_Revision == -1) return(ToString(3)); 
            return(ToString(4));
        }

        public String ToString(int fieldCount) { 
            switch (fieldCount) {
            case 0: 
                return(String.Empty); 
            case 1:
                return(String.Concat(_Major)); 
            case 2:
                return(String.Concat(_Major,".",_Minor));
            default:
                if (_Build == -1) 
                    throw new ArgumentException(String.Format(CultureInfo.CurrentCulture, Environment.GetResourceString("ArgumentOutOfRange_Bounds_Lower_Upper"), "0", "2"), "fieldCount");
                if (fieldCount == 3) 
                    return( _Major + "." + _Minor + "." + _Build ); 

                if (_Revision == -1) 
                    throw new ArgumentException(String.Format(CultureInfo.CurrentCulture, Environment.GetResourceString("ArgumentOutOfRange_Bounds_Lower_Upper"), "0", "3"), "fieldCount");

                if (fieldCount == 4)
                    return( Major + "." + _Minor + "." + _Build + "." + _Revision ); 

                throw new ArgumentException(String.Format(CultureInfo.CurrentCulture, Environment.GetResourceString("ArgumentOutOfRange_Bounds_Lower_Upper"), "0", "4"), "fieldCount"); 
            } 
        }
 
        public static bool operator ==(Version v1, Version v2) {
            if (Object.ReferenceEquals(v1, null)) {
                return Object.ReferenceEquals(v2, null);
            } 

            return v1.Equals(v2); 
        } 

        public static bool operator !=(Version v1, Version v2) { 
            return !(v1 == v2);
        }

        public static bool operator <(Version v1, Version v2) { 
            if ((Object) v1 == null)
                throw new ArgumentNullException("v1"); 
            return (v1.CompareTo(v2) < 0); 
        }
 
        public static bool operator <=(Version v1, Version v2) {
            if ((Object) v1 == null)
                throw new ArgumentNullException("v1");
            return (v1.CompareTo(v2) <= 0); 
        }
 
        public static bool operator >(Version v1, Version v2) { 
            return (v2 < v1);
        } 

        public static bool operator >=(Version v1, Version v2) {
            return (v2 <= v1);
        } 
    }
}
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