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113 lines (100 loc) · 3.18 KB
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using System;
namespace Python.Runtime
{
/// <summary>
/// Represents a Python float object. See the documentation at
/// 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) : base(FromObject(o))
{
}
/// <summary>
/// PyFloat Constructor
/// </summary>
/// <remarks>
/// Creates a new Python float from a double value.
/// </remarks>
public PyFloat(double value) : base(FromDouble(value))
{
}
private static IntPtr FromObject(PyObject o)
{
if (o == null || !IsFloatType(o))
{
throw new ArgumentException("object is not a float");
}
Runtime.XIncref(o.obj);
return o.obj;
}
private static IntPtr FromDouble(double value)
{
IntPtr val = Runtime.PyFloat_FromDouble(value);
PythonException.ThrowIfIsNull(val);
return val;
}
private static IntPtr FromString(string value)
{
using (var s = new PyString(value))
{
IntPtr val = Runtime.PyFloat_FromString(s.obj, IntPtr.Zero);
PythonException.ThrowIfIsNull(val);
return val;
}
}
/// <summary>
/// PyFloat Constructor
/// </summary>
/// <remarks>
/// Creates a new Python float from a string value.
/// </remarks>
public PyFloat(string value) : base(FromString(value))
{
}
/// <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);
PythonException.ThrowIfIsNull(op);
return new PyFloat(op);
}
}
}