From fa5ca6168676d5a7ac8fb85c3d2fcd363e337697 Mon Sep 17 00:00:00 2001
From: "Simon D. Levy" <simon.d.levy@gmail.com>
Date: Sun, 7 Sep 2014 21:09:43 -0400
Subject: [PATCH] Create pyextension_utils.h

---
 python/pyextension_utils.h | 146 +++++++++++++++++++++++++++++++++++++
 1 file changed, 146 insertions(+)
 create mode 100644 python/pyextension_utils.h

diff --git a/python/pyextension_utils.h b/python/pyextension_utils.h
new file mode 100644
index 0000000..d700e84
--- /dev/null
+++ b/python/pyextension_utils.h
@@ -0,0 +1,146 @@
+/*
+pyextension_utils.h : header for Python C extension utilities
+
+Copyright (C) 2014 Simon D. Levy
+
+This code is free software: you can redistribute it and/or modify
+it under the terms of the GNU Lesser General Public License as 
+published by the Free Software Foundation, either version 3 of the 
+License, or (at your option) any later version.
+
+This code is distributed in the hope that it will be useful,     
+but WITHOUT ANY WARRANTY without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU Lesser General Public License 
+along with this code.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+
+/**
+* Raises a bad-argument exception and returns NULL
+* @param classname name of class in which exception happened
+* @param methodname name of method in which exception happened
+* @param details details of exception
+* @return NULL
+*/
+
+PyObject *
+null_on_raise_argument_exception_with_details(
+    const char * classname, 
+    const char * methodname, 
+    const char * details);
+
+/**
+* Raises a bad-argument exception and returns NULL
+* @param classname name of class in which exception happened
+* @param methodname name of method in which exception happened
+* @return NULL
+*/
+PyObject *
+null_on_raise_argument_exception(
+    const char * classname, 
+    const char *  methodname);
+
+/**
+* Raises a bad-argument exception and returns -1
+* @param classname name of class in which exception happened
+* @param methodname name of method in which exception happened
+* @param details details of exception
+* @return -1
+*/
+int
+error_on_raise_argument_exception_with_details(
+    const char * classname, 
+    const char *  methodname, 
+    const char * details);
+
+/**
+* Raises a bad-argument exception and returns -1 on __init__.
+* @param classname name of class in which exception happened
+* @param methodname name of method in which exception happened
+* @return -1
+*/
+int
+error_on_raise_argument_exception(
+    const char * classname);
+
+/**
+* Returns 1 if type is ready, 0 otherwise
+* @param type the type object
+* @return 1 if type is ready, 0 otherwise
+*/
+int 
+type_is_ready(
+    PyTypeObject * type);
+
+/**
+* Adds a class to a module.
+* @param module the module
+* @param type the type object
+* @param name the class name
+*/
+void 
+add_class(
+    PyObject * module, 
+    PyTypeObject * type, 
+    const char * classname);
+    
+ /**
+ * Extracts a double from a tuple.
+ * @param tup the tuple
+ * @param pos position in the tuple
+ * @param val gets the returned value
+ * @return true on sucess, false on failure
+ */
+ int
+ double_from_tuple(
+   PyObject * tup,
+   int pos,
+   double * val);
+ 
+/**
+ * Extracts a named double from an object.
+ * @param obj the obj
+ * @param name the name
+ * @param val gets the returned value
+ * @return true on sucess, false on failure
+ */
+ int
+ double_from_obj(
+   PyObject * obj,
+   const char * name,
+   double * val);
+ 
+/**
+ * Extracts a named int from an object.
+ * @param obj the obj
+ * @param name the name
+ * @param val gets the returned value
+ * @return true on sucess, false on failure
+ */
+ int
+int_from_obj(
+   PyObject * obj,
+   const char * name,
+   int * val); 
+
+   
+/**
+* Raises a bad-argument exception and returns -1 on passing of incorrent argument type
+* @param classname name of class in which exception happened
+* @param methodname name of method in which exception happened
+* @param typname name of expected type
+* @return -1 on error; 0 on success
+*/
+int 
+error_on_check_argument_type(
+    PyObject * obj, 
+    PyTypeObject * typ, 
+    int pos,
+    const char * typname, 
+    const char * classname,
+    const char *methodname);
+
+