add files I forgot to add in last commit

astraw · astraw · commit 86b3cc243b9c · 2007-07-13T22:15:10.000Z
svn path=/trunk/matplotlib/; revision=3517
diff --git a/src/MPL_isnan.h b/src/MPL_isnan.h
@@ -0,0 +1,33 @@
+// These definitions modified from numarray's Include/numarray/nummacro.h
+
+#if defined(SIZEOF_VOID_P)
+#if SIZEOF_VOID_P == 8
+#define MPL_LP64 1
+#else
+#define MPL_LP64 0
+#endif
+#else
+#define MPL_LP64 0
+#endif
+
+#if MPL_LP64
+typedef long int                 MPL_Int64;
+#else                  /* 32-bit platforms */
+#if defined(_MSC_VER)
+typedef __int64                  MPL_Int64;
+#else
+typedef long long                MPL_Int64;
+#endif
+#endif
+
+#if !defined(MPL_isnan64)
+#define MPL_U64(u) (* (MPL_Int64 *) &(u) )
+
+#if !defined(_MSC_VER)
+#define MPL_isnan64(u) \
+  ( (( MPL_U64(u) & 0x7ff0000000000000LL) == 0x7ff0000000000000LL)  && ((MPL_U64(u) & 0x000fffffffffffffLL) != 0)) ? 1:0
+#else
+#define MPL_isnan64(u) \
+  ( (( MPL_U64(u) & 0x7ff0000000000000i64) == 0x7ff0000000000000i64)  && ((MPL_U64(u) & 0x000fffffffffffffi64) != 0)) ? 1:0
+#endif
+#endif /* MPL_isnan64 */
diff --git a/src/_isnan.c b/src/_isnan.c
@@ -0,0 +1,32 @@
+#include "Python.h"
+#include "MPL_isnan.h"
+
+static PyObject *
+isnan64(PyObject *self, PyObject *args)
+{
+  double input;
+  if (!PyArg_ParseTuple(args, "d",
+			&input))
+    return NULL;
+
+  if (MPL_isnan64(input)) {
+    Py_INCREF(Py_True);
+    return Py_True;
+  }
+  
+  Py_INCREF(Py_False);
+  return Py_False;
+}
+
+static PyMethodDef _isnan_functions[] = {
+    { "isnan64", (PyCFunction)isnan64, METH_VARARGS },
+    { NULL, NULL, 0 }
+};
+
+DL_EXPORT(void)
+init_isnan(void)
+{
+    PyObject *mod;
+    mod = Py_InitModule("matplotlib._isnan",
+			_isnan_functions);
+}
