From 1b6734b68d788a57b9491360a3ca8dfebeae60bc Mon Sep 17 00:00:00 2001
From: Mark Wooding <mdw@distorted.org.uk>
Date: Mon, 12 Sep 2016 22:27:23 +0100
Subject: [PATCH] util.c: Add conversions between Python objects and
 `kludge64'.

---
 catacomb-python.h |  2 ++
 util.c            | 45 +++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 47 insertions(+)

diff --git a/catacomb-python.h b/catacomb-python.h
index 80f5854..5c012ef 100644
--- a/catacomb-python.h
+++ b/catacomb-python.h
@@ -235,11 +235,13 @@ extern int convulong(PyObject *, void *);
 DOUINTSZ(DECL_CONVU_)
 extern int convmpw(PyObject *, void *);
 extern int convuint(PyObject *, void *);
+extern int convk64(PyObject *, void *);
 extern int convszt(PyObject *, void *);
 extern int convbool(PyObject *, void *);
 extern PyObject *abstract_pynew(PyTypeObject *, PyObject *, PyObject *);
 extern PyObject *getbool(int);
 extern PyObject *getulong(unsigned long);
+extern PyObject *getk64(kludge64);
 extern void *newtype(PyTypeObject *, const PyTypeObject *, const char *);
 
 extern PyObject *mkexc(PyObject *, PyObject *, const char *, PyMethodDef *);
diff --git a/util.c b/util.c
index f63bda0..4e82ed6 100644
--- a/util.c
+++ b/util.c
@@ -42,6 +42,29 @@ PyObject *getulong(unsigned long w)
     return (PyLong_FromUnsignedLong(w));
 }
 
+static PyObject *i32 = 0;
+static int init_i32(void)
+  { if (!i32 && (i32 = PyInt_FromLong(32)) == 0) return (-1); return (0); }
+
+PyObject *getk64(kludge64 u)
+{
+  PyObject *i = 0, *j = 0, *t;
+  PyObject *rc = 0;
+
+  if (init_i32()) goto end;
+  if ((i = PyLong_FromUnsignedLong(HI64(u))) == 0) goto end;
+  if ((t = PyNumber_InPlaceLshift(i, i32)) == 0) goto end;
+  Py_DECREF(i); i = t;
+  if ((j = PyLong_FromUnsignedLong(LO64(u))) == 0) goto end;
+  if ((t = PyNumber_InPlaceOr(i, j)) == 0) goto end;
+  Py_DECREF(i); i = t;
+  if ((rc = PyNumber_Int(i)) == 0) goto end;
+end:
+  if (i) Py_DECREF(i);
+  if (j) Py_DECREF(j);
+  return (rc);
+}
+
 PyObject *getbool(int b)
 {
   if (b) RETURN_TRUE;
@@ -103,6 +126,28 @@ end:
   return (0);
 }
 
+int convk64(PyObject *o, void *pp)
+{
+  PyObject *i = 0, *t;
+  int rc = 0;
+  uint32 lo, hi;
+
+  if (init_i32()) goto end;
+  if ((i = PyNumber_Int(o)) == 0) goto end;
+  lo = PyInt_AsUnsignedLongMask(i);
+  if ((t = PyNumber_InPlaceRshift(i, i32)) == 0) goto end;
+  Py_DECREF(i); i = t;
+  hi = PyInt_AsUnsignedLongMask(i);
+  if ((t = PyNumber_InPlaceRshift(i, i32)) == 0) goto end;
+  Py_DECREF(i); i = t;
+  if (PyObject_IsTrue(i)) VALERR("out of range");
+  SET64(*(kludge64 *)pp, hi, lo);
+  rc = 1;
+end:
+  if (i) Py_DECREF(i);
+  return (rc);
+}
+
 int convmpw(PyObject *o, void *pp)
 {
   unsigned long u;
-- 
2.11.0