add hg and python

1 files changed, 78 insertions, 0 deletions

diff --git a/sys/src/cmd/python/Python/importdl.c b/sys/src/cmd/python/Python/importdl.c
new file mode 100644
index 000000000..9c325e447
--- /dev/null
+++ b/sys/src/cmd/python/Python/importdl.c
@@ -0,0 +1,78 @@
+
+/* Support for dynamic loading of extension modules */
+
+#include "Python.h"
+
+/* ./configure sets HAVE_DYNAMIC_LOADING if dynamic loading of modules is
+   supported on this platform. configure will then compile and link in one
+   of the dynload_*.c files, as appropriate. We will call a function in
+   those modules to get a function pointer to the module's init function.
+*/
+#ifdef HAVE_DYNAMIC_LOADING
+
+#include "importdl.h"
+
+extern dl_funcptr _PyImport_GetDynLoadFunc(const char *name,
+					   const char *shortname,
+					   const char *pathname, FILE *fp);
+
+
+
+PyObject *
+_PyImport_LoadDynamicModule(char *name, char *pathname, FILE *fp)
+{
+	PyObject *m;
+	char *lastdot, *shortname, *packagecontext, *oldcontext;
+	dl_funcptr p;
+
+	if ((m = _PyImport_FindExtension(name, pathname)) != NULL) {
+		Py_INCREF(m);
+		return m;
+	}
+	lastdot = strrchr(name, '.');
+	if (lastdot == NULL) {
+		packagecontext = NULL;
+		shortname = name;
+	}
+	else {
+		packagecontext = name;
+		shortname = lastdot+1;
+	}
+
+	p = _PyImport_GetDynLoadFunc(name, shortname, pathname, fp);
+	if (PyErr_Occurred())
+		return NULL;
+	if (p == NULL) {
+		PyErr_Format(PyExc_ImportError,
+		   "dynamic module does not define init function (init%.200s)",
+			     shortname);
+		return NULL;
+	}
+        oldcontext = _Py_PackageContext;
+	_Py_PackageContext = packagecontext;
+	(*p)();
+	_Py_PackageContext = oldcontext;
+	if (PyErr_Occurred())
+		return NULL;
+
+	m = PyDict_GetItemString(PyImport_GetModuleDict(), name);
+	if (m == NULL) {
+		PyErr_SetString(PyExc_SystemError,
+				"dynamic module not initialized properly");
+		return NULL;
+	}
+	/* Remember the filename as the __file__ attribute */
+	if (PyModule_AddStringConstant(m, "__file__", pathname) < 0)
+		PyErr_Clear(); /* Not important enough to report */
+
+	if (_PyImport_FixupExtension(name, pathname) == NULL)
+		return NULL;
+	if (Py_VerboseFlag)
+		PySys_WriteStderr(
+			"import %s # dynamically loaded from %s\n",
+			name, pathname);
+	Py_INCREF(m);
+	return m;
+}
+
+#endif /* HAVE_DYNAMIC_LOADING */