qemu_api: Add override XML and C files for QEMU APIs

There is only one function (virDomainQemuMonitorCommand) need to
be hand-craft.

python/libvirt-qemu-override-api.xml

@@ -0,0 +1,12 @@
+<?xml version="1.0"?>
+<api name='libvir-qemu-python'>
+  <symbols>
+      <function name='virDomainQemuMonitorCommand' file='python-qemu'>
+        <info>Send an arbitrary monitor command through qemu monitor of domain</info>
+        <return type='str *' info='the command output or None in case of error'/>
+        <arg name='domain' type='virDomainPtr' info='pointer to domain object'/>
+        <arg name='cmd' type='const char *' info='the command which will be passed to QEMU monitor'/>
+        <arg name='flags' type='unsigned int' info='an OR&apos;ed set of virDomainQemuMonitorCommandFlags'/>
+      </function>
+  </symbols>
+</api>

python/libvirt-qemu-override.c

@@ -0,0 +1,136 @@
+/*
+ * libvir.c: this modules implements the main part of the glue of the
+ *           libvir library and the Python interpreter. It provides the
+ *           entry points where an automatically generated stub is
+ *           unpractical
+ *
+ * Copyright (C) 2011 Red Hat, Inc.
+ *
+ * Daniel Veillard <veillard@redhat.com>
+ */
+
+#include <config.h>
+
+/* Horrible kludge to work around even more horrible name-space pollution
+   via Python.h.  That file includes /usr/include/python2.5/pyconfig*.h,
+   which has over 180 autoconf-style HAVE_* definitions.  Shame on them.  */
+#undef HAVE_PTHREAD_H
+
+#include <Python.h>
+#include "libvirt/libvirt-qemu.h"
+#include "libvirt/virterror.h"
+#include "typewrappers.h"
+#include "libvirt-qemu.h"
+
+#ifndef __CYGWIN__
+extern void initlibvirtmod_qemu(void);
+#else
+extern void initcygvirtmod_qemu(void);
+#endif
+
+#if 0
+# define DEBUG_ERROR 1
+#endif
+
+#if DEBUG_ERROR
+# define DEBUG(fmt, ...)            \
+   printf(fmt, __VA_ARGS__)
+#else
+# define DEBUG(fmt, ...)            \
+   do {} while (0)
+#endif
+
+/* The two-statement sequence "Py_INCREF(Py_None); return Py_None;"
+   is so common that we encapsulate it here.  Now, each use is simply
+   return VIR_PY_NONE;  */
+#define VIR_PY_NONE (Py_INCREF (Py_None), Py_None)
+#define VIR_PY_INT_FAIL (libvirt_intWrap(-1))
+#define VIR_PY_INT_SUCCESS (libvirt_intWrap(0))
+
+/* We don't want to free() returned value. As written in doc:
+ * PyString_AsString returns pointer to 'internal buffer of string,
+ * not a copy' and 'It must not be deallocated'. */
+static char *py_str(PyObject *obj)
+{
+    PyObject *str = PyObject_Str(obj);
+    if (!str) {
+        PyErr_Print();
+        PyErr_Clear();
+        return NULL;
+    };
+    return PyString_AsString(str);
+}
+
+/************************************************************************
+ *									*
+ *		Statistics						*
+ *									*
+ ************************************************************************/
+
+static PyObject *
+libvirt_qemu_virDomainQemuMonitorCommand(PyObject *self ATTRIBUTE_UNUSED,
+                                    PyObject *args) {
+    PyObject *py_retval;
+    char *result = NULL;
+    virDomainPtr domain;
+    PyObject *pyobj_domain;
+    unsigned int flags;
+    char *cmd;
+    int c_retval;
+
+    if (!PyArg_ParseTuple(args, (char *)"Ozi:virDomainQemuMonitorCommand",
+                          &pyobj_domain, &cmd, &flags))
+        return(NULL);
+    domain = (virDomainPtr) PyvirDomain_Get(pyobj_domain);
+
+    if (domain == NULL)
+        return VIR_PY_NONE;
+    LIBVIRT_BEGIN_ALLOW_THREADS;
+    c_retval = virDomainQemuMonitorCommand(domain, cmd, &result, flags);
+    LIBVIRT_END_ALLOW_THREADS;
+
+    if (c_retval < 0)
+        return VIR_PY_NONE;
+
+    py_retval = PyString_FromString(result);
+    return(py_retval);
+}
+
+/************************************************************************
+ *									*
+ *			The registration stuff				*
+ *									*
+ ************************************************************************/
+static PyMethodDef libvirtQemuMethods[] = {
+#include "libvirt-qemu-export.c"
+    {(char *) "virDomainQemuMonitorCommand", libvirt_qemu_virDomainQemuMonitorCommand, METH_VARARGS, NULL},
+    {NULL, NULL, 0, NULL}
+};
+
+void
+#ifndef __CYGWIN__
+initlibvirtmod_qemu
+#else
+initcygvirtmod_qemu
+#endif
+  (void)
+{
+    static int initialized = 0;
+
+    if (initialized != 0)
+        return;
+
+    if (virInitialize() < 0)
+        return;
+
+    /* initialize the python extension module */
+    Py_InitModule((char *)
+#ifndef __CYGWIN__
+                  "libvirtmod_qemu"
+#else
+                  "cygvirtmod_qemu"
+#endif
+                  , libvirtQemuMethods);
+
+    initialized = 1;
+}