moved from branch ralf_grosse_kunstleve to trunk

[SVN r9813]
2026-01-22 05:22:45 +00:00 · 2001-04-17 18:53:38 +00:00
parent 9ee563b864
commit 533a005764
2 changed files with 409 additions and 0 deletions
--- a/src/cross_module.cpp
+++ b/src/cross_module.cpp
@@ -0,0 +1,87 @@
+/* (C) Copyright Ralf W. Grosse-Kunstleve 2001. Permission to copy, use,
+   modify, sell and distribute this software is granted provided this
+   copyright notice appears in all copies. This software is provided
+   "as is" without express or implied warranty, and with no claim as to
+   its suitability for any purpose.
+
+   Revision History:
+     17 Apr 01 merged into boost CVS trunk (Ralf W. Grosse-Kunstleve)
+*/
+
+# include <boost/python/cross_module.hpp>
+namespace python = boost::python;
+# include <stdio.h> // MSVC6.0SP4 does not know std::fprintf
+# include <string.h> // MSVC6.0SP4 does not know std::strcmp
+
+namespace {
+
+  PyObject* get_module_dict(const char* module_name)
+  {
+      python::ref module_obj(PyImport_ImportModule((char*) module_name));
+      PyObject* module_dict = PyModule_GetDict(module_obj.get());
+      if (module_dict == 0) throw python::import_error();
+      return module_dict;
+  }
+}
+
+namespace boost { namespace python { namespace detail {
+
+const char* converters_attribute_name = "__converters__";
+
+void* import_converter_object(const std::string& module_name,
+                              const std::string& py_class_name,
+                              const std::string& attribute_name)
+{
+    static std::string err;
+    PyObject* module_dict = get_module_dict(const_cast<char*>(module_name.c_str()));
+    PyObject* py_class = PyDict_GetItemString(module_dict, const_cast<char*>(py_class_name.c_str()));
+    if (py_class == 0) {
+        err = std::string("module ") + module_name + " has no attribute " + py_class_name;
+        PyErr_SetString(PyExc_RuntimeError, const_cast<char*>(err.c_str()));
+        throw python::import_error();
+    }
+    python::ref c_obj(PyObject_GetAttrString(py_class, const_cast<char*>(attribute_name.c_str())), ref::null_ok);
+    if (c_obj.get() == 0) {
+        err = std::string("object ") + module_name + "." + py_class_name
+              + " has no attribute " + attribute_name;
+        PyErr_SetString(PyExc_RuntimeError, const_cast<char*>(err.c_str()));
+        throw python::import_error();
+    }
+    if (! PyCObject_Check(c_obj.get())) {
+        err = std::string("object ") + module_name + "." + py_class_name + "."
+              + attribute_name + " is not a PyCObject";
+        PyErr_SetString(PyExc_RuntimeError, const_cast<char*>(err.c_str()));
+        throw python::import_error();
+    }
+    return PyCObject_AsVoidPtr(c_obj.get());
+}
+
+void check_export_converters_api(const int importing_major,
+                                 const int importing_minor,
+                                 const int imported_major,
+                                 const int imported_minor)
+{
+    if (importing_major != imported_major) {
+        // Python uses fprintf(stderr, ...) for API warnings.
+        fprintf(stderr,
+          "Fatal: export_converters_api mismatch:"
+          " Importing module = %d.%d"
+          " Imported module = %d.%d\n",
+          importing_major, importing_minor,
+          imported_major, imported_minor);
+        PyErr_SetString(PyExc_RuntimeError,
+          "Fatal: export_converters_api mismatch");
+        throw import_error();
+    }
+    if (importing_minor != imported_minor) {
+        // Python uses fprintf(stderr, ...) for API warnings.
+        fprintf(stderr,
+          "Warning: export_converters_api mismatch:"
+          " Importing module = %d.%d"
+          " Imported module = %d.%d\n",
+          importing_major, importing_minor,
+          imported_major, imported_minor);
+    }
+}
+
+}}} // namespace boost::python::detail