#include "Python.h"
#include "opcode.h"

/*[clinic input]
module _opcode
[clinic start generated code]*/
/*[clinic end generated code: output=da39a3ee5e6b4b0d input=117442e66eb376e6]*/

#include "clinic/_opcode.c.h"

/*[clinic input]

_opcode.stack_effect -> int

 opcode: int
 oparg: object = None
 /

Compute the stack effect of the opcode.
[clinic start generated code]*/

static int
_opcode_stack_effect_impl(PyObject *module, int opcode, PyObject *oparg)
/*[clinic end generated code: output=ad39467fa3ad22ce input=2d0a9ee53c0418f5]*/
{
 int effect;
 int oparg_int = 0;
 if (HAS_ARG(opcode)) {
 if (oparg == Py_None) {
 PyErr_SetString(PyExc_ValueError,
 "stack_effect: opcode requires oparg but oparg was not specified");
 return -1;
 }
 oparg_int = (int)PyLong_AsLong(oparg);
 if ((oparg_int == -1) && PyErr_Occurred())
 return -1;
 }
 else if (oparg != Py_None) {
 PyErr_SetString(PyExc_ValueError,
 "stack_effect: opcode does not permit oparg but oparg was specified");
 return -1;
 }
 effect = PyCompile_OpcodeStackEffect(opcode, oparg_int);
 if (effect == PY_INVALID_STACK_EFFECT) {
 PyErr_SetString(PyExc_ValueError,
 "invalid opcode or oparg");
 return -1;
 }
 return effect;
}




static PyMethodDef
opcode_functions[] = {
 _OPCODE_STACK_EFFECT_METHODDEF
 {NULL, NULL, 0, NULL}
};


static struct PyModuleDef opcodemodule = {
 PyModuleDef_HEAD_INIT,
 "_opcode",
 "Opcode support module.",
 -1,
 opcode_functions,
 NULL,
 NULL,
 NULL,
 NULL
};

PyMODINIT_FUNC
PyInit__opcode(void)
{
 return PyModule_Create(&opcodemodule);
}