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/*
Copyright (c) 2016 Wenzel Jakob <wenzel.jakob@epfl.ch>
All rights reserved. Use of this source code is governed by a
BSD-style license that can be found in the LICENSE file.
*/
#pragma once
#include "pybind11.h"
NAMESPACE_BEGIN(PYBIND11_NAMESPACE)
enum eval_mode {
eval_expr,
eval_single_statement,
eval_statements
};
template <eval_mode mode = eval_expr>
object eval(str expr, object global = globals(), object local = object()) {
if (!local)
local = global;
std::string buffer = "# -*- coding: utf-8 -*-\n" + (std::string) expr;
int start;
switch (mode) {
case eval_expr: start = Py_eval_input; break;
case eval_single_statement: start = Py_single_input; break;
case eval_statements: start = Py_file_input; break;
default: pybind11_fail("invalid evaluation mode");
}
PyObject *result = PyRun_String(buffer.c_str(), start, global.ptr(), local.ptr());
if (!result)
throw error_already_set();
return reinterpret_steal<object>(result);
}
template <eval_mode mode = eval_expr, size_t N>
object eval(const char (&s)[N], object global = globals(), object local = object()) {
auto expr = (s[0] == '\n') ? str(module::import("textwrap").attr("dedent")(s))
: str(s);
return eval<mode>(expr, global, local);
}
inline void exec(str expr, object global = globals(), object local = object()) {
eval<eval_statements>(expr, global, local);
}
template <size_t N>
void exec(const char (&s)[N], object global = globals(), object local = object()) {
eval<eval_statements>(s, global, local);
}
template <eval_mode mode = eval_statements>
object eval_file(str fname, object global = globals(), object local = object()) {
if (!local)
local = global;
int start;
switch (mode) {
case eval_expr: start = Py_eval_input; break;
case eval_single_statement: start = Py_single_input; break;
case eval_statements: start = Py_file_input; break;
default: pybind11_fail("invalid evaluation mode");
}
int closeFile = 1;
std::string fname_str = (std::string) fname;
#if PY_VERSION_HEX >= 0x03040000
FILE *f = _Py_fopen_obj(fname.ptr(), "r");
#elif PY_VERSION_HEX >= 0x03000000
FILE *f = _Py_fopen(fname.ptr(), "r");
#else
auto fobj = reinterpret_steal<object>(PyFile_FromString(
const_cast<char *>(fname_str.c_str()),
const_cast<char*>("r")));
FILE *f = nullptr;
if (fobj)
f = PyFile_AsFile(fobj.ptr());
closeFile = 0;
#endif
if (!f) {
PyErr_Clear();
pybind11_fail("File \"" + fname_str + "\" could not be opened!");
}
#if PY_VERSION_HEX < 0x03000000 && defined(PYPY_VERSION)
PyObject *result = PyRun_File(f, fname_str.c_str(), start, global.ptr(),
local.ptr());
(void) closeFile;
#else
PyObject *result = PyRun_FileEx(f, fname_str.c_str(), start, global.ptr(),
local.ptr(), closeFile);
#endif
if (!result)
throw error_already_set();
return reinterpret_steal<object>(result);
}
NAMESPACE_END(PYBIND11_NAMESPACE)
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