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z3/src/api/dotnet/FPNum.cs
Christoph M. Wintersteiger ee0ec7fe3a FPA API: numerals, .NET and Java
Signed-off-by: Christoph M. Wintersteiger <cwinter@microsoft.com>
2015-01-10 17:28:07 +00:00

103 lines
2.7 KiB
C#

/*++
Copyright (c) 2013 Microsoft Corporation
Module Name:
FPNum.cs
Abstract:
Z3 Managed API: Floating Point Numerals
Author:
Christoph Wintersteiger (cwinter) 2013-06-10
Notes:
--*/
using System;
using System.Diagnostics.Contracts;
namespace Microsoft.Z3
{
/// <summary>
/// FloatiungPoint Numerals
/// </summary>
[ContractVerification(true)]
public class FPNum : FPExpr
{
/// <summary>
/// Retrieves the sign of a floating-point literal
/// </summary>
/// <remarks>
/// Remarks: returns true if the numeral is negative
/// </remarks>
public bool Sign
{
get
{
int res = 0;
if (Native.Z3_fpa_get_numeral_sign(Context.nCtx, NativeObject, ref res) == 0)
throw new Z3Exception("Sign is not a Boolean value");
return res != 0;
}
}
/// <summary>
/// The significand value of a floating-point numeral as a string
/// </summary>
/// <remarks>
/// The significand s is always 0 &lt; s &lt; 2.0; the resulting string is long
/// enough to represent the real significand precisely.
/// </remarks>
public string Significand
{
get
{
return Native.Z3_fpa_get_numeral_significand_string(Context.nCtx, NativeObject);
}
}
/// <summary>
/// Return the exponent value of a floating-point numeral as a string
/// </summary>
public string Exponent
{
get
{
return Native.Z3_fpa_get_numeral_exponent_string(Context.nCtx, NativeObject);
}
}
/// <summary>
/// Return the exponent value of a floating-point numeral as a signed 64-bit integer
/// </summary>
public Int64 ExponentInt64
{
get
{
Int64 result = 0;
if (Native.Z3_fpa_get_numeral_exponent_int64(Context.nCtx, NativeObject, ref result) == 0)
throw new Z3Exception("Exponent is not a 64 bit integer");
return result;
}
}
#region Internal
internal FPNum(Context ctx, IntPtr obj)
: base(ctx, obj)
{
Contract.Requires(ctx != null);
}
#endregion
/// <summary>
/// Returns a string representation of the numeral.
/// </summary>
public override string ToString()
{
return Native.Z3_get_numeral_string(Context.nCtx, NativeObject);
}
}
}