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123 lines
3.5 KiB
C#
123 lines
3.5 KiB
C#
// ==========================================================================
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// This software is subject to the provisions of the Zope Public License,
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// Version 2.0 (ZPL). A copy of the ZPL should accompany this distribution.
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// THIS SOFTWARE IS PROVIDED "AS IS" AND ANY AND ALL EXPRESS OR IMPLIED
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// WARRANTIES ARE DISCLAIMED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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// WARRANTIES OF TITLE, MERCHANTABILITY, AGAINST INFRINGEMENT, AND FITNESS
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// FOR A PARTICULAR PURPOSE.
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// ==========================================================================
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using System;
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using System.Runtime.InteropServices;
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namespace Python.Runtime {
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/// <summary>
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/// Represents a Python float object. See the documentation at
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/// http://www.python.org/doc/current/api/floatObjects.html
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/// </summary>
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public class PyFloat : PyNumber {
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/// <summary>
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/// PyFloat Constructor
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/// </summary>
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///
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/// <remarks>
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/// Creates a new PyFloat from an existing object reference. Note
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/// that the instance assumes ownership of the object reference.
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/// The object reference is not checked for type-correctness.
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/// </remarks>
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public PyFloat(IntPtr ptr) : base(ptr) {}
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/// <summary>
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/// PyFloat Constructor
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/// </summary>
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///
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/// <remarks>
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/// Copy constructor - obtain a PyFloat from a generic PyObject. An
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/// ArgumentException will be thrown if the given object is not a
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/// Python float object.
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/// </remarks>
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public PyFloat(PyObject o) : base() {
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if (!IsFloatType(o)) {
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throw new ArgumentException("object is not a float");
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}
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Runtime.Incref(o.obj);
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obj = o.obj;
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}
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/// <summary>
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/// PyFloat Constructor
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/// </summary>
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///
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/// <remarks>
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/// Creates a new Python float from a double value.
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/// </remarks>
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public PyFloat(double value) : base() {
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obj = Runtime.PyFloat_FromDouble(value);
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if (obj == IntPtr.Zero) {
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throw new PythonException();
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}
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}
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/// <summary>
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/// PyFloat Constructor
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/// </summary>
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///
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/// <remarks>
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/// Creates a new Python float from a string value.
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/// </remarks>
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public PyFloat(string value) : base() {
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PyString s = new PyString(value);
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obj = Runtime.PyFloat_FromString(s.obj, IntPtr.Zero);
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if (obj == IntPtr.Zero) {
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throw new PythonException();
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}
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}
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/// <summary>
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/// IsFloatType Method
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/// </summary>
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///
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/// <remarks>
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/// Returns true if the given object is a Python float.
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/// </remarks>
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public static bool IsFloatType(PyObject value) {
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return Runtime.PyFloat_Check(value.obj);
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}
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/// <summary>
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/// AsFloat Method
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/// </summary>
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///
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/// <remarks>
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/// <remarks>
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/// Convert a Python object to a Python float if possible, raising
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/// a PythonException if the conversion is not possible. This is
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/// equivalent to the Python expression "float(object)".
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/// </remarks>
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public static PyFloat AsFloat(PyObject value) {
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IntPtr op = Runtime.PyNumber_Float(value.obj);
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if (op == IntPtr.Zero) {
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throw new PythonException();
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}
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return new PyFloat(op);
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}
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}
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}
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