OracleMonthSpan.cs source code in C# .NET

                        
Code:
                         / Dotnetfx_Win7_3.5.1 / Dotnetfx_Win7_3.5.1 / 3.5.1 / DEVDIV / depot / DevDiv / releases / whidbey / NetFXspW7 / ndp / fx / src / DataOracleClient / System / Data / OracleClient / OracleMonthSpan.cs / 1 / OracleMonthSpan.cs
                        

                        
                            //------------------------------------------------------------------------------ 
// 
//      Copyright (c) Microsoft Corporation.  All rights reserved.
// 
// [....] 
//-----------------------------------------------------------------------------
 
namespace System.Data.OracleClient 
{
    using System; 
    using System.Data.SqlTypes;
    using System.Data.Common;
    using System.Diagnostics;
    using System.Globalization; 
    using System.Runtime.InteropServices;
    using System.Text; 
 
    //---------------------------------------------------------------------
    // OracleMonthSpan 
    //
    //  This class implements support the Oracle 9i 'INTERVAL YEAR TO MONTH'
    //  internal data type.
    // 
    [StructLayout(LayoutKind.Sequential, Pack=1)]
    public struct OracleMonthSpan : IComparable, INullable { 
 
        private int _value;
        private const int MaxMonth =  176556; 
        private const int MinMonth = -176556;


        public static readonly OracleMonthSpan MaxValue = new OracleMonthSpan(MaxMonth);  // 4172 BC - 9999 AD * 12 months/year 

        public static readonly OracleMonthSpan MinValue = new OracleMonthSpan(MinMonth); // 4172 BC - 9999 AD * 12 months/year 
 
        public static readonly OracleMonthSpan Null = new OracleMonthSpan(true);
 

        private const int NullValue = Int32.MaxValue;

 
        // Construct from nothing -- the value will be null
        internal OracleMonthSpan(bool isNull) { 
            _value = NullValue; 
        }
 
        // Construct from an integer number of months
        public OracleMonthSpan (int months) {
            _value = months;
            AssertValid(_value); 
        }
 
        public OracleMonthSpan (Int32 years, Int32 months) { 
            try {
                checked { _value = (years * 12) + months; }  // Will assert below if invalid. 
            }
            catch (System.OverflowException) {
                throw ADP.MonthOutOfRange();
            } 
            AssertValid(_value);
        } 
 
        // Copy constructor
        public OracleMonthSpan (OracleMonthSpan from) { 
            _value = from._value;
        }

        // (internal) construct from a row/parameter binding 
        internal OracleMonthSpan (NativeBuffer buffer, int valueOffset) {
            _value = MarshalToInt32(buffer, valueOffset); 
        } 

 
        public bool IsNull {
            get {
                return (NullValue == _value);
            } 
        }
 
        public int Value { 
            get {
                if (IsNull) { 
                    throw ADP.DataIsNull();
                }
                return _value;
            } 
        }
 
 
        static private void AssertValid(int monthSpan) {
            if (monthSpan < MinMonth || monthSpan > MaxMonth) { 
                throw ADP.MonthOutOfRange();
            }
        }
 
        public int CompareTo(object obj) {
            if (obj.GetType() == typeof(OracleMonthSpan)) { 
                OracleMonthSpan odt = (OracleMonthSpan)obj; 

                // If both values are Null, consider them equal. 
                // Otherwise, Null is less than anything.
                if (IsNull) {
                    return odt.IsNull ? 0  : -1;
                } 

                if (odt.IsNull) { 
                    return 1; 
                }
                // Neither value is null, do the comparison. 

                int result = _value.CompareTo(odt._value);
                return result;
            } 

            throw ADP.WrongType(obj.GetType(), typeof(OracleMonthSpan)); 
        } 

        public override bool Equals(object value) { 
            if (value is OracleMonthSpan) {
                return (this == (OracleMonthSpan)value).Value;
            }
            else { 
                return false;
            } 
        } 

        public override int GetHashCode() { 
            return IsNull ? 0 : _value.GetHashCode();
        }

        static internal int MarshalToInt32( NativeBuffer buffer, int valueOffset) { 
            byte[] ociValue = buffer.ReadBytes(valueOffset, 5);
 
            int years   = (int)((long)( (int)ociValue[0] << 24 
                                      | (int)ociValue[1] << 16
                                      | (int)ociValue[2] <<  8 
                                      | (int)ociValue[3]
                                      ) - 0x80000000);

            int months  = (int)ociValue[4] - 60; 

            int result = (years * 12) + months; 
            AssertValid(result); 

            return result; 
        }

        static internal int MarshalToNative(object value, NativeBuffer buffer, int offset) {
            int from; 

            if ( value is OracleMonthSpan ) 
                from = ((OracleMonthSpan)value)._value; 
            else
                from = (int)value; 

            byte[] ociValue = new byte[5];

            int years   = (int)((long)(from / 12) + 0x80000000); 
            int months  = from % 12;
 
            // DEVNOTE: undoubtedly, this is Intel byte order specific, but how 
            //          do I verify what Oracle needs on a non Intel machine?
 
            ociValue[0] = (byte)((years >> 24));
            ociValue[1] = (byte)((years >> 16) & 0xff);
            ociValue[2] = (byte)((years >>  8) & 0xff);
            ociValue[3] = (byte)(years & 0xff); 
            ociValue[4] = (byte)(months + 60);
 
            buffer.WriteBytes(offset, ociValue, 0, 5); 
            return 5;
        } 

        public static OracleMonthSpan Parse(string s) {
            int ms = Int32.Parse(s, CultureInfo.InvariantCulture);
            return new OracleMonthSpan(ms); 
        }
 
        public override string ToString() { 
            if (IsNull) {
                return ADP.NullString; 
            }
            string retval = Value.ToString(CultureInfo.CurrentCulture);
            return retval;
        } 

        public static OracleBoolean Equals(OracleMonthSpan x, OracleMonthSpan y) { 
            // Alternative method for operator == 
            return (x == y);
        } 

        public static OracleBoolean GreaterThan(OracleMonthSpan x, OracleMonthSpan y) {
            // Alternative method for operator >
            return (x > y); 
        }
 
        public static OracleBoolean GreaterThanOrEqual(OracleMonthSpan x, OracleMonthSpan y) { 
            // Alternative method for operator >=
            return (x >= y); 
        }

        public static OracleBoolean LessThan(OracleMonthSpan x, OracleMonthSpan y) {
            // Alternative method for operator < 
            return (x < y);
        } 
 
        public static OracleBoolean LessThanOrEqual(OracleMonthSpan x, OracleMonthSpan y) {
            // Alternative method for operator <= 
            return (x <= y);
        }

        public static OracleBoolean NotEquals(OracleMonthSpan x, OracleMonthSpan y) { 
            // Alternative method for operator !=
            return (x != y); 
        } 

        public static explicit operator int(OracleMonthSpan x) { 
            if (x.IsNull) {
                throw ADP.DataIsNull();
            }
            return x.Value; 
        }
 
        public static explicit operator OracleMonthSpan(string x) { 
            return OracleMonthSpan.Parse(x);
        } 


        public static OracleBoolean operator==  (OracleMonthSpan x, OracleMonthSpan y) {
            return (x.IsNull || y.IsNull) ? OracleBoolean.Null : new OracleBoolean(x.CompareTo(y) == 0); 
        }
 
        public static OracleBoolean operator>   (OracleMonthSpan x, OracleMonthSpan y) { 
            return (x.IsNull || y.IsNull) ? OracleBoolean.Null : new OracleBoolean(x.CompareTo(y) > 0);
        } 

        public static OracleBoolean operator>=  (OracleMonthSpan x, OracleMonthSpan y) {
            return (x.IsNull || y.IsNull) ? OracleBoolean.Null : new OracleBoolean(x.CompareTo(y) >= 0);
        } 

        public static OracleBoolean operator<   (OracleMonthSpan x, OracleMonthSpan y) { 
            return (x.IsNull || y.IsNull) ? OracleBoolean.Null : new OracleBoolean(x.CompareTo(y) < 0); 
        }
 
        public static OracleBoolean operator<=  (OracleMonthSpan x, OracleMonthSpan y) {
            return (x.IsNull || y.IsNull) ? OracleBoolean.Null : new OracleBoolean(x.CompareTo(y) <= 0);
        }
 
        public static OracleBoolean operator!=  (OracleMonthSpan x, OracleMonthSpan y) {
            return (x.IsNull || y.IsNull) ? OracleBoolean.Null : new OracleBoolean(x.CompareTo(y) != 0); 
        } 

    } 
}

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
//------------------------------------------------------------------------------ 
// 
//      Copyright (c) Microsoft Corporation.  All rights reserved.
// 
// [....] 
//-----------------------------------------------------------------------------
 
namespace System.Data.OracleClient 
{
    using System; 
    using System.Data.SqlTypes;
    using System.Data.Common;
    using System.Diagnostics;
    using System.Globalization; 
    using System.Runtime.InteropServices;
    using System.Text; 
 
    //---------------------------------------------------------------------
    // OracleMonthSpan 
    //
    //  This class implements support the Oracle 9i 'INTERVAL YEAR TO MONTH'
    //  internal data type.
    // 
    [StructLayout(LayoutKind.Sequential, Pack=1)]
    public struct OracleMonthSpan : IComparable, INullable { 
 
        private int _value;
        private const int MaxMonth =  176556; 
        private const int MinMonth = -176556;


        public static readonly OracleMonthSpan MaxValue = new OracleMonthSpan(MaxMonth);  // 4172 BC - 9999 AD * 12 months/year 

        public static readonly OracleMonthSpan MinValue = new OracleMonthSpan(MinMonth); // 4172 BC - 9999 AD * 12 months/year 
 
        public static readonly OracleMonthSpan Null = new OracleMonthSpan(true);
 

        private const int NullValue = Int32.MaxValue;

 
        // Construct from nothing -- the value will be null
        internal OracleMonthSpan(bool isNull) { 
            _value = NullValue; 
        }
 
        // Construct from an integer number of months
        public OracleMonthSpan (int months) {
            _value = months;
            AssertValid(_value); 
        }
 
        public OracleMonthSpan (Int32 years, Int32 months) { 
            try {
                checked { _value = (years * 12) + months; }  // Will assert below if invalid. 
            }
            catch (System.OverflowException) {
                throw ADP.MonthOutOfRange();
            } 
            AssertValid(_value);
        } 
 
        // Copy constructor
        public OracleMonthSpan (OracleMonthSpan from) { 
            _value = from._value;
        }

        // (internal) construct from a row/parameter binding 
        internal OracleMonthSpan (NativeBuffer buffer, int valueOffset) {
            _value = MarshalToInt32(buffer, valueOffset); 
        } 

 
        public bool IsNull {
            get {
                return (NullValue == _value);
            } 
        }
 
        public int Value { 
            get {
                if (IsNull) { 
                    throw ADP.DataIsNull();
                }
                return _value;
            } 
        }
 
 
        static private void AssertValid(int monthSpan) {
            if (monthSpan < MinMonth || monthSpan > MaxMonth) { 
                throw ADP.MonthOutOfRange();
            }
        }
 
        public int CompareTo(object obj) {
            if (obj.GetType() == typeof(OracleMonthSpan)) { 
                OracleMonthSpan odt = (OracleMonthSpan)obj; 

                // If both values are Null, consider them equal. 
                // Otherwise, Null is less than anything.
                if (IsNull) {
                    return odt.IsNull ? 0  : -1;
                } 

                if (odt.IsNull) { 
                    return 1; 
                }
                // Neither value is null, do the comparison. 

                int result = _value.CompareTo(odt._value);
                return result;
            } 

            throw ADP.WrongType(obj.GetType(), typeof(OracleMonthSpan)); 
        } 

        public override bool Equals(object value) { 
            if (value is OracleMonthSpan) {
                return (this == (OracleMonthSpan)value).Value;
            }
            else { 
                return false;
            } 
        } 

        public override int GetHashCode() { 
            return IsNull ? 0 : _value.GetHashCode();
        }

        static internal int MarshalToInt32( NativeBuffer buffer, int valueOffset) { 
            byte[] ociValue = buffer.ReadBytes(valueOffset, 5);
 
            int years   = (int)((long)( (int)ociValue[0] << 24 
                                      | (int)ociValue[1] << 16
                                      | (int)ociValue[2] <<  8 
                                      | (int)ociValue[3]
                                      ) - 0x80000000);

            int months  = (int)ociValue[4] - 60; 

            int result = (years * 12) + months; 
            AssertValid(result); 

            return result; 
        }

        static internal int MarshalToNative(object value, NativeBuffer buffer, int offset) {
            int from; 

            if ( value is OracleMonthSpan ) 
                from = ((OracleMonthSpan)value)._value; 
            else
                from = (int)value; 

            byte[] ociValue = new byte[5];

            int years   = (int)((long)(from / 12) + 0x80000000); 
            int months  = from % 12;
 
            // DEVNOTE: undoubtedly, this is Intel byte order specific, but how 
            //          do I verify what Oracle needs on a non Intel machine?
 
            ociValue[0] = (byte)((years >> 24));
            ociValue[1] = (byte)((years >> 16) & 0xff);
            ociValue[2] = (byte)((years >>  8) & 0xff);
            ociValue[3] = (byte)(years & 0xff); 
            ociValue[4] = (byte)(months + 60);
 
            buffer.WriteBytes(offset, ociValue, 0, 5); 
            return 5;
        } 

        public static OracleMonthSpan Parse(string s) {
            int ms = Int32.Parse(s, CultureInfo.InvariantCulture);
            return new OracleMonthSpan(ms); 
        }
 
        public override string ToString() { 
            if (IsNull) {
                return ADP.NullString; 
            }
            string retval = Value.ToString(CultureInfo.CurrentCulture);
            return retval;
        } 

        public static OracleBoolean Equals(OracleMonthSpan x, OracleMonthSpan y) { 
            // Alternative method for operator == 
            return (x == y);
        } 

        public static OracleBoolean GreaterThan(OracleMonthSpan x, OracleMonthSpan y) {
            // Alternative method for operator >
            return (x > y); 
        }
 
        public static OracleBoolean GreaterThanOrEqual(OracleMonthSpan x, OracleMonthSpan y) { 
            // Alternative method for operator >=
            return (x >= y); 
        }

        public static OracleBoolean LessThan(OracleMonthSpan x, OracleMonthSpan y) {
            // Alternative method for operator < 
            return (x < y);
        } 
 
        public static OracleBoolean LessThanOrEqual(OracleMonthSpan x, OracleMonthSpan y) {
            // Alternative method for operator <= 
            return (x <= y);
        }

        public static OracleBoolean NotEquals(OracleMonthSpan x, OracleMonthSpan y) { 
            // Alternative method for operator !=
            return (x != y); 
        } 

        public static explicit operator int(OracleMonthSpan x) { 
            if (x.IsNull) {
                throw ADP.DataIsNull();
            }
            return x.Value; 
        }
 
        public static explicit operator OracleMonthSpan(string x) { 
            return OracleMonthSpan.Parse(x);
        } 


        public static OracleBoolean operator==  (OracleMonthSpan x, OracleMonthSpan y) {
            return (x.IsNull || y.IsNull) ? OracleBoolean.Null : new OracleBoolean(x.CompareTo(y) == 0); 
        }
 
        public static OracleBoolean operator>   (OracleMonthSpan x, OracleMonthSpan y) { 
            return (x.IsNull || y.IsNull) ? OracleBoolean.Null : new OracleBoolean(x.CompareTo(y) > 0);
        } 

        public static OracleBoolean operator>=  (OracleMonthSpan x, OracleMonthSpan y) {
            return (x.IsNull || y.IsNull) ? OracleBoolean.Null : new OracleBoolean(x.CompareTo(y) >= 0);
        } 

        public static OracleBoolean operator<   (OracleMonthSpan x, OracleMonthSpan y) { 
            return (x.IsNull || y.IsNull) ? OracleBoolean.Null : new OracleBoolean(x.CompareTo(y) < 0); 
        }
 
        public static OracleBoolean operator<=  (OracleMonthSpan x, OracleMonthSpan y) {
            return (x.IsNull || y.IsNull) ? OracleBoolean.Null : new OracleBoolean(x.CompareTo(y) <= 0);
        }
 
        public static OracleBoolean operator!=  (OracleMonthSpan x, OracleMonthSpan y) {
            return (x.IsNull || y.IsNull) ? OracleBoolean.Null : new OracleBoolean(x.CompareTo(y) != 0); 
        } 

    } 
}

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
                        

                        

                        
                        

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