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122 lines (98 loc) · 3.55 KB
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// ==========================================================================
// This software is subject to the provisions of the Zope Public License,
// Version 2.0 (ZPL). A copy of the ZPL should accompany this distribution.
// THIS SOFTWARE IS PROVIDED "AS IS" AND ANY AND ALL EXPRESS OR IMPLIED
// WARRANTIES ARE DISCLAIMED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
// WARRANTIES OF TITLE, MERCHANTABILITY, AGAINST INFRINGEMENT, AND FITNESS
// FOR A PARTICULAR PURPOSE.
// ==========================================================================
using System;
using System.Runtime.InteropServices;
namespace Python.Runtime {
/// <summary>
/// Represents a Python float object. See the documentation at
/// http://www.python.org/doc/current/api/floatObjects.html
/// </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) : base() {
if (!IsFloatType(o)) {
throw new ArgumentException("object is not a float");
}
Runtime.Incref(o.obj);
obj = o.obj;
}
/// <summary>
/// PyFloat Constructor
/// </summary>
///
/// <remarks>
/// Creates a new Python float from a double value.
/// </remarks>
public PyFloat(double value) : base() {
obj = Runtime.PyFloat_FromDouble(value);
if (obj == IntPtr.Zero) {
throw new PythonException();
}
}
/// <summary>
/// PyFloat Constructor
/// </summary>
///
/// <remarks>
/// Creates a new Python float from a string value.
/// </remarks>
public PyFloat(string value) : base() {
PyString s = new PyString(value);
obj = Runtime.PyFloat_FromString(s.obj, IntPtr.Zero);
if (obj == IntPtr.Zero) {
throw new PythonException();
}
}
/// <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>
/// <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);
if (op == IntPtr.Zero) {
throw new PythonException();
}
return new PyFloat(op);
}
}
}