Marcin Krol wrote:
Hello everyone,
I'm trying to embed Python interpreter in C code, but in a specific way:
loading compiled bytecode into a memory location and executing it (don't
ask why, complicated reasons).
PyImport_ExecCodeModule seems like obvious candidate, docs say:
"Given a module name (possibly of the form package.module) and a code
object read from a Python bytecode file or obtained from the built-in
function compile(), load the module."
[...]
mainobj = PyImport_ExecCodeModule("multiply", (PyObject *)
python_code);
[...]
python_code is a C string containing the raw bytes from your pyc file.
Casting that to a PyObject pointer will not magically transform it into
a Python code object. A pyc file contains the following:
1) An 8 byte header containing a magic number.
2) A "marshal" serialization of the code object.
So, in order to transform those contents into a code object, you need to
skip the 8 byte header and an unmarshal the rest. Basically, replace the
line above with something like this:
codeobj = PyMarshal_ReadObjectFromString(python_code+8, size-8);
mainobj = PyImport_ExecCodeModule("multiply", codeobj);
where codeobj is of type (PyObject *).
Once that works, add magic number checking and exception handling to taste.
Hope this helps,
--
Carsten Haese
http://informixdb.sourceforge.net
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