#include <Python.h>

#include <assert.h>

#include <stdlib.h>

#include <unistd.h>

#include "FuzzedDataProvider.h"

#include "pyutil.h"

#include <string>

extern "C" {

static PYCODETYPE *code;

extern "C" int LLVMFuzzerInitialize(int *argc, char ***argv)

{

  contrib::initpy(*argv[0]);

  code = (PYCODETYPE *)Py_CompileString(R"py(

try:

  lm = parsers.lazymanifest(mdata)

  # iterate the whole thing, which causes the code to fully parse

  # every line in the manifest

  for e, _, _ in lm.iterentries():

      # also exercise __getitem__ et al

      lm[e]

      e in lm

      (e + 'nope') in lm

  lm[b'xyzzy'] = (b'\0' * nlen, 'x')

  # do an insert, text should change

  assert lm.text() != mdata, "insert should change text and didn't: %r %r" % (lm.text(), mdata)

  cloned = lm.filtercopy(lambda x: x != 'xyzzy')

  assert cloned.text() == mdata, 'cloned text should equal mdata'

  cloned.diff(lm)

  del lm[b'xyzzy']

  cloned.diff(lm)

  # should be back to the same

  assert lm.text() == mdata, "delete should have restored text but didn't: %r %r" % (lm.text(), mdata)

except Exception as e:

  pass

  # uncomment this print if you're editing this Python code

  # to debug failures.

  # print e

)py",

                                        "fuzzer", Py_file_input);

  return 0;

}

int LLVMFuzzerTestOneInput(const uint8_t *Data, size_t Size)

{

  // Don't allow fuzzer inputs larger than 100k, since we'll just bog

  // down and not accomplish much.

  if (Size > 100000) {

    return 0;

  }

  FuzzedDataProvider provider(Data, Size);

  Py_ssize_t nodelength = provider.ConsumeBool() ? 20 : 32;

  PyObject *nlen = PyLong_FromSsize_t(nodelength);

  PyObject *mtext =

      PyBytes_FromStringAndSize((const char *)Data, (Py_ssize_t)Size);

  PyObject *locals = PyDict_New();

  PyDict_SetItemString(locals, "mdata", mtext);

  PyDict_SetItemString(locals, "nlen", nlen);

  PyObject *res = PyEval_EvalCode(code, contrib::pyglobals(), locals);

  if (!res) {

    PyErr_Print();

  }

  Py_XDECREF(res);

  Py_DECREF(locals);

  Py_DECREF(mtext);

  return 0; // Non-zero return values are reserved for future use.

}

}