// System.Data.SqlTypes.SqlSingle
//
// Authors:
// Konstantin Triger <kostat@mainsoft.com>
// Boris Kirzner <borisk@mainsoft.com>
//
// (C) 2005 Mainsoft Corporation (http://www.mainsoft.com)
//
//
// 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 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.
//
namespace System.Data.SqlTypes{
/**
* <p>Title: </p>
* <p>Description: </p>
* <p>Copyright: Copyright (c) 2002</p>
* <p>Company: MainSoft</p>
* @author Pavel Sandler
* @version 1.0
*/
using System;
public struct SqlSingle : INullable, IComparable
{
private float _value;
private static float _minVal = -3.40E+38F;
private static float _maxVal = 3.40E+38F;
public static readonly SqlSingle MaxValue = new SqlSingle(3.40E+38F);
public static readonly SqlSingle MinValue = new SqlSingle(-3.40E+38F);
public static readonly SqlSingle Null = new SqlSingle(true);
public static readonly SqlSingle Zero = new SqlSingle(0);
private bool _isNull;
private SqlSingle(bool isNull)
{
_isNull = isNull;
_value = 0;
}
/**
* Constructor
* @param value A float whose value will be used for the new SqlSingle.
*/
public SqlSingle(float value)
{
_value = value;
_isNull = false;
}
/**
* Indicates whether or not Value is null.
* @return true if Value is null, otherwise false.
*/
public bool IsNull
{
get
{
return _isNull;
}
}
/**
* Gets the value of the SqlSingle instance.
* @return the value of this instance
*/
public float Value
{
get
{
if(IsNull)
throw new SqlNullValueException();
return _value;
}
}
/**
* The addition operator computes the sum of the two SqlSingle operands.
* @param x A SqlSingle structure.
* @param y A SqlSingle structure.
* @return The sum of the two SqlSingle operands.
* If one of the parameters is null or null value - return SqlSingle.Null.
*/
public static SqlSingle Add(SqlSingle x, SqlSingle y)
{
if (x.IsNull || y.IsNull)
return SqlSingle.Null;
float xVal = x._value;
float yVal = y._value;
if (xVal < 0 && yVal < 0 && (_minVal - xVal > yVal))
throw new System.OverflowException("Overflow - " + x + " + " + y + " < " + _minVal);
if (xVal > 0 && yVal > 0 && (_maxVal - xVal < yVal))
throw new System.OverflowException("Overflow - " + x + " + " + y + " > " + _maxVal);
return new SqlSingle(xVal + yVal);
}
/**
* Compares this instance to the supplied object and returns an indication of their relative values.
* @param obj The object to compare.
* @return A signed number indicating the relative values of the instance and the object.
* Less than zero This instance is less than object.
* Zero This instance is the same as object.
* Greater than zero This instance is greater than object -or-
* object is a null reference.
*/
public int CompareTo(Object obj)
{
if (obj == null)
return 1;
if (obj is SqlSingle)
{
SqlSingle d = (SqlSingle)obj;
if (d.IsNull)
return 1;
if (this.IsNull)
return -1;
return this._value.CompareTo(d._value);
}
throw new ArgumentException("parameter obj is not SqlSingle : " + obj.GetType().Name);
}
/**
* The division operator divides the first SqlSingle operand by the second.
* @param x A SqlSingle instance.
* @param y A SqlSingle instance.
* @return A SqlSingle structure containing the results of the division operation.
* If one of the parameters is null or null value - return SqlSingle.Null.
*/
public static SqlSingle Divide(SqlSingle x, SqlSingle y)
{
if (x.IsNull || y.IsNull)
return SqlSingle.Null;
float xVal = x._value;
float yVal = y._value;
if (java.lang.Math.abs(yVal) < 1)
{
if (xVal < 0 && yVal < 0 && (_maxVal * yVal > xVal))
throw new System.OverflowException("Overflow - " + x + " / " + y + " > " + _maxVal);
if (xVal < 0 && yVal > 0 && (_minVal * yVal > xVal))
throw new System.OverflowException("Overflow - " + x + " / " + y + " < " + _minVal);
if (xVal > 0 && yVal < 0 && (_minVal * yVal < xVal))
throw new System.OverflowException("Overflow - " + x + " / " + y + " < " + _minVal);
if (xVal > 0 && yVal > 0 && (_maxVal * yVal < xVal))
throw new System.OverflowException("Overflow - " + x + " / " + y + " > " + _maxVal);
}
return new SqlSingle(xVal / yVal);
}
public override bool Equals(Object obj)
{
if (Object.ReferenceEquals(obj, this))
return true;
if (obj == null)
return false;
if (obj is SqlSingle)
{
SqlSingle d = (SqlSingle)obj;
if (IsNull && d.IsNull)
return true;
if (IsNull || d.IsNull)
return false;
return _value.Equals(d._value);
}
return false;
}
/**
* Performs a logical comparison on two instances of SqlSingle to determine if they are equal.
* @param x A SqlSingle instance.
* @param y A SqlSingle instance.
* @return true if the two values are equal, otherwise false.
* If one of the parameters is null or null value return SqlBoolean.Null.
*/
public static SqlBoolean Equals(SqlSingle x, SqlSingle y)
{
if (x.IsNull || y.IsNull)
return SqlBoolean.Null;
if (x.Equals(y))
return SqlBoolean.True;
return SqlBoolean.False;
}
/**
* Compares two instances of SqlSingle to determine if the first is greater than the second.
* @param x A SqlSingle instance
* @param y A SqlSingle instance
* @return A SqlBoolean that is True if the first instance is greater than the second instance, otherwise False.
* If either instance of SqlSingle is null, the Value of the SqlBoolean will be Null.
*/
public static SqlBoolean GreaterThan(SqlSingle x, SqlSingle y)
{
if (x.IsNull || y.IsNull)
return SqlBoolean.Null;
if (x._value > y._value)
return SqlBoolean.True;
return SqlBoolean.False;
}
/**
* Compares two instances of SqlSingle to determine if the first is greater than or equal to the second.
* @param x A SqlSingle instance
* @param y A SqlSingle instance
* @return A SqlBoolean that is True if the first instance is greaater than or equal to the second instance, otherwise False.
* If either instance of SqlSingle is null, the Value of the SqlBoolean will be Null.
*/
public static SqlBoolean GreaterThanOrEqual(SqlSingle x, SqlSingle y)
{
if (x.IsNull || y.IsNull)
return SqlBoolean.Null;
if (x._value >= y._value)
return SqlBoolean.True;
return SqlBoolean.False;
}
/**
* Compares two instances of SqlSingle to determine if the first is less than the second.
* @param x A SqlSingle instance
* @param y A SqlSingle instance
* @return A SqlBoolean that is True if the first instance is less than the second instance, otherwise False.
* If either instance of SqlSingle is null, the Value of the SqlBoolean will be Null.
*/
public static SqlBoolean LessThan(SqlSingle x, SqlSingle y)
{
if (x.IsNull || y.IsNull)
return SqlBoolean.Null;
if (x._value < y._value)
return SqlBoolean.True;
return SqlBoolean.False;
}
/**
* Compares two instances of SqlSingle to determine if the first is less than or equal to the second.
* @param x A SqlSingle instance
* @param y A SqlSingle instance
* @return A SqlBoolean that is True if the first instance is less than or equal to the second instance, otherwise False.
* If either instance of SqlSingle is null, the Value of the SqlBoolean will be Null.
*/
public static SqlBoolean LessThanOrEqual(SqlSingle x, SqlSingle y)
{
if (x.IsNull || y.IsNull)
return SqlBoolean.Null;
if (x._value <= y._value)
return SqlBoolean.True;
return SqlBoolean.False;
}
/**
* The multiplication operator computes the product of the two SqlSingle operands.
* @param x A SqlSingle instance
* @param y A SqlSingle instance
* @return The product of the two SqlSingle operands.
*/
public static SqlSingle Multiply(SqlSingle x, SqlSingle y)
{
if (x.IsNull || y.IsNull)
return SqlSingle.Null;
float xVal = x._value;
float yVal = y._value;
if (java.lang.Math.abs(xVal) > 1 && java.lang.Math.abs(yVal) > 1)
{
if (xVal < 0 && yVal < 0 && (_maxVal / xVal > yVal))
throw new System.OverflowException("Overflow - " + x + " * " + y + " > " + _maxVal);
if (xVal < 0 && yVal > 0 && (_minVal / xVal < yVal))
throw new System.OverflowException("Overflow - " + x + " * " + y + " < " + _minVal);
if (xVal > 0 && yVal < 0 && (_minVal / xVal > yVal))
throw new System.OverflowException("Overflow - " + x + " * " + y + " < " + _minVal);
if (xVal > 0 && yVal > 0 && (_maxVal / xVal < yVal))
throw new System.OverflowException("Overflow - " + x + " * " + y + " > " + _maxVal);
}
return new SqlSingle(xVal * yVal);
}
/**
* Compares two instances of SqlSingle to determine if they are equal.
* @param x A SqlSingle instance
* @param y A SqlSingle instance
* @return A SqlBoolean that is True if the two instances are not equal or False if the two instances are equal.
* If either instance of SqlSingle is null, the Value of the SqlBoolean will be Null.
*/
public static SqlBoolean NotEquals(SqlSingle x, SqlSingle y)
{
SqlBoolean res = Equals(x, y);
if (res.IsNull)
return res;
if (res.IsFalse)
return SqlBoolean.True;
return SqlBoolean.False;
}
/**
* Converts the String representation of a number to its float-precision floating point number equivalent.
* @param s The String to be parsed.
* @return A SqlSingle containing the value represented by the String.
*/
public static SqlSingle Parse(String s)
{
float d = Single.Parse(s);
return new SqlSingle(d);
}
/**
* The subtraction operator the second SqlSingle operand from the first.
* @param x A SqlSingle instance
* @param y A SqlSingle instance
* @return The results of the subtraction operation.
*/
public static SqlSingle Subtract(SqlSingle x, SqlSingle y)
{
if (x.IsNull || y.IsNull)
return SqlSingle.Null;
float xVal = x._value;
float yVal = y._value;
if (xVal < 0 && yVal > 0 && (java.lang.Math.abs(_minVal - xVal) < yVal))
throw new System.OverflowException("Overflow - " + x + " - " + y + " < " + _minVal);
if (xVal > 0 && yVal < 0 && (_maxVal - xVal < java.lang.Math.abs(yVal)))
throw new System.OverflowException("Overflow - " + x + " - " + y + " > " + _maxVal);
return new SqlSingle(x._value - y._value);
}
/**
* Converts this SqlSingle structure to SqlBoolean.
* @return A SqlBoolean structure whose Value will be True if the SqlSingle structure's Value is non-zero, False if the SqlSingle is zero
* and Null if the SqlSingle structure is Null.
*/
public SqlBoolean ToSqlBoolean()
{
if (_value == 0)
return new SqlBoolean(0);
return new SqlBoolean(1);
}
/**
* Converts this SqlSingle structure to SqlByte.
* @return A SqlByte structure whose Value equals the Value of this SqlSingle structure.
*/
public SqlByte ToSqlByte()
{
int val = (int)_value;
if (val < 0 || val > 255)
throw new OverflowException("Can not conver this instance to SqlByte - overflowing : " + val);
return new SqlByte((byte)val);
}
/**
* Converts this SqlSingle structure to SqlDouble.
* @return A SqlDouble structure whose Value equals the Value of this SqlSingle structure.
*/
public SqlDouble ToSqlDouble()
{
return new SqlDouble(_value);
}
/**
* Converts this SqlSingle structure to SqlDecimal.
* @return A SqlDecimal structure whose Value equals the Value of this SqlSingle structure.
*/
public SqlDecimal ToSqlDecimal()
{
return new SqlDecimal(_value);
}
/**
* Converts this SqlSingle structure to SqlInt16.
* @return A SqlInt16 structure whose Value equals the Value of this SqlSingle structure.
*/
public SqlInt16 ToSqlInt16()
{
return new SqlInt16((short)_value);
}
/**
* Converts this SqlSingle structure to SqlInt32.
* @return A SqlInt32 structure whose Value equals the Value of this SqlSingle structure.
*/
public SqlInt32 ToSqlInt32()
{
return new SqlInt32((int)_value);
}
/**
* Converts this SqlSingle structure to SqlInt64.
* @return A SqlInt64 structure whose Value equals the Value of this SqlSingle structure.
*/
public SqlInt64 ToSqlInt64()
{
return new SqlInt64((long)_value);
}
/**
* Converts this SqlSingle instance to SqlSingle.
* @return A SqlMoney instance whose Value equals the Value of this SqlSingle instance.
*/
public SqlMoney ToSqlMoney()
{
return new SqlMoney(_value);
}
/**
* Converts this SqlSingle structure to SqlString.
* @return A SqlString structure whose value is a string representing the date and time contained in this SqlSingle structure.
*/
public SqlString ToSqlString()
{
return new SqlString(ToString());
}
public override String ToString()
{
if (IsNull)
return "null";
return _value.ToString();
}
public override int GetHashCode()
{
return _value.GetHashCode();
}
public static SqlSingle operator + (SqlSingle x, SqlSingle y)
{
float f = (float)(x.Value + y.Value);
if (Single.IsInfinity (f))
throw new OverflowException ();
return new SqlSingle (f);
}
public static SqlSingle operator / (SqlSingle x, SqlSingle y)
{
float f = (float)(x.Value / y.Value);
if (Single.IsInfinity (f))
{
if (y.Value == 0d)
throw new DivideByZeroException ();
}
return new SqlSingle (x.Value / y.Value);
}
public static SqlBoolean operator == (SqlSingle x, SqlSingle y)
{
if (x.IsNull || y .IsNull)
return SqlBoolean.Null;
return new SqlBoolean (x.Value == y.Value);
}
public static SqlBoolean operator > (SqlSingle x, SqlSingle y)
{
if (x.IsNull || y .IsNull)
return SqlBoolean.Null;
return new SqlBoolean (x.Value > y.Value);
}
public static SqlBoolean operator >= (SqlSingle x, SqlSingle y)
{
if (x.IsNull || y .IsNull)
return SqlBoolean.Null;
return new SqlBoolean (x.Value >= y.Value);
}
public static SqlBoolean operator != (SqlSingle x, SqlSingle y)
{
if (x.IsNull || y .IsNull)
return SqlBoolean.Null;
return new SqlBoolean (!(x.Value == y.Value));
}
public static SqlBoolean operator < (SqlSingle x, SqlSingle y)
{
if (x.IsNull || y .IsNull)
return SqlBoolean.Null;
return new SqlBoolean (x.Value < y.Value);
}
public static SqlBoolean operator <= (SqlSingle x, SqlSingle y)
{
if (x.IsNull || y .IsNull)
return SqlBoolean.Null;
return new SqlBoolean (x.Value <= y.Value);
}
public static SqlSingle operator * (SqlSingle x, SqlSingle y)
{
float f = (float)(x.Value * y.Value);
if (Single.IsInfinity (f))
throw new OverflowException ();
return new SqlSingle (f);
}
public static SqlSingle operator - (SqlSingle x, SqlSingle y)
{
float f = (float)(x.Value - y.Value);
if (Single.IsInfinity (f))
throw new OverflowException ();
return new SqlSingle (f);
}
public static SqlSingle operator - (SqlSingle n)
{
return new SqlSingle (-(n.Value));
}
public static explicit operator SqlSingle (SqlBoolean x)
{
checked
{
if (x.IsNull)
return Null;
return new SqlSingle((float)x.ByteValue);
}
}
public static explicit operator SqlSingle (SqlDouble x)
{
if (x.IsNull)
return Null;
float f = (float)x.Value;
if (Single.IsInfinity (f))
throw new OverflowException ();
return new SqlSingle(f);
}
public static explicit operator float (SqlSingle x)
{
return x.Value;
}
public static explicit operator SqlSingle (SqlString x)
{
checked
{
if (x.IsNull)
return Null;
return SqlSingle.Parse (x.Value);
}
}
public static implicit operator SqlSingle (float x)
{
return new SqlSingle (x);
}
public static implicit operator SqlSingle (SqlByte x)
{
if (x.IsNull)
return Null;
else
return new SqlSingle((float)x.Value);
}
public static implicit operator SqlSingle (SqlDecimal x)
{
if (x.IsNull)
return Null;
else
return new SqlSingle((float)x.Value);
}
public static implicit operator SqlSingle (SqlInt16 x)
{
if (x.IsNull)
return Null;
else
return new SqlSingle((float)x.Value);
}
public static implicit operator SqlSingle (SqlInt32 x)
{
if (x.IsNull)
return Null;
else
return new SqlSingle((float)x.Value);
}
public static implicit operator SqlSingle (SqlInt64 x)
{
if (x.IsNull)
return Null;
else
return new SqlSingle((float)x.Value);
}
public static implicit operator SqlSingle (SqlMoney x)
{
if (x.IsNull)
return Null;
else
return new SqlSingle((float)x.Value);
}
}
}
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