python integrated both ways (see sample.dat), and initialized on-demand

1 files changed, 55 insertions, 0 deletions

diff --git a/python.h b/python.h
new file mode 100644
index 00000000..7faefa0d
--- /dev/null
+++ b/python.h
@@ -0,0 +1,55 @@
+#ifndef _PYTHON_H
+#define _PYTHON_H
+
+#include <boost/python.hpp>
+
+using namespace boost::python;
+
+namespace ledger {
+
+struct python_support
+{
+  handle<> main_module;
+  dict     main_namespace;
+
+  python_support()
+    : main_module(borrowed(PyImport_AddModule("__main__"))),
+      main_namespace(handle<>(borrowed(PyModule_GetDict(main_module.get()))))
+  {}
+  ~python_support() {
+  }
+};
+
+extern python_support * python_interpretor;
+
+void init_python();
+
+inline void python_eval(std::istream& in)
+{
+  if (! python_interpretor)
+    init_python();
+
+  std::string buffer;
+  buffer.reserve(4096);
+  while (! in.eof()) {
+    char buf[256];
+    in.getline(buf, 255);
+    if (buf[0] == '!')
+      break;
+    buffer += buf;
+    buffer += "\n";
+  }
+
+  try {
+    handle<>(borrowed(PyRun_String(buffer.c_str(), Py_file_input,
+				   python_interpretor->main_namespace.ptr(),
+				   python_interpretor->main_namespace.ptr())));
+  }
+  catch(const boost::python::error_already_set&) {
+    PyErr_Print();
+  }
+}
+
+} // namespace ledger
+
+#endif // _PYTHON_H