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using System;

namespace Python.Runtime

{

/// <summary>

/// Represents a Python float object. See the documentation at

/// PY2: https://docs.python.org/2/c-api/float.html

/// PY3: https://docs.python.org/3/c-api/float.html

/// for details.

/// </summary>

public class PyFloat : PyNumber

{

/// <summary>

/// PyFloat Constructor

/// </summary>

/// <remarks>

/// Creates a new PyFloat from an existing object reference. Note

/// that the instance assumes ownership of the object reference.

/// The object reference is not checked for type-correctness.

/// </remarks>

public PyFloat(IntPtr ptr) : base(ptr)

{

}

/// <summary>

/// PyFloat Constructor

/// </summary>

/// <remarks>

/// Copy constructor - obtain a PyFloat from a generic PyObject. An

/// ArgumentException will be thrown if the given object is not a

/// Python float object.

/// </remarks>

public PyFloat(PyObject o)

{

if (!IsFloatType(o))

{

throw new ArgumentException("object is not a float");

}

Runtime.XIncref(o.obj);

obj = o.obj;

}

/// <summary>

/// PyFloat Constructor

/// </summary>

/// <remarks>

/// Creates a new Python float from a double value.

/// </remarks>

public PyFloat(double value)

{

obj = Runtime.PyFloat_FromDouble(value);

Runtime.CheckExceptionOccurred();

}

/// <summary>

/// PyFloat Constructor

/// </summary>

/// <remarks>

/// Creates a new Python float from a string value.

/// </remarks>

public PyFloat(string value)

{

using (var s = new PyString(value))

{

obj = Runtime.PyFloat_FromString(s.obj, IntPtr.Zero);

Runtime.CheckExceptionOccurred();

}

}

/// <summary>

/// IsFloatType Method

/// </summary>

/// <remarks>

/// Returns true if the given object is a Python float.

/// </remarks>

public static bool IsFloatType(PyObject value)

{

return Runtime.PyFloat_Check(value.obj);

}

/// <summary>

/// AsFloat Method

/// </summary>

/// <remarks>

/// Convert a Python object to a Python float if possible, raising

/// a PythonException if the conversion is not possible. This is

/// equivalent to the Python expression "float(object)".

/// </remarks>

public static PyFloat AsFloat(PyObject value)

{

IntPtr op = Runtime.PyNumber_Float(value.obj);

Runtime.CheckExceptionOccurred();

return new PyFloat(op);

}

}

}