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/*
* Copyright (c) 2003-2009, John Wiegley. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* - Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* - Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* - Neither the name of New Artisans LLC nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "pyinterp.h"
#include <boost/python/module_init.hpp>
namespace ledger {
using namespace boost::python;
void export_utils();
void export_times();
void export_amount();
void export_commodity();
#if 0
void export_balance();
void export_value();
void export_journal();
void export_parser();
void export_option();
void export_walk();
void export_report();
void export_format();
void export_valexpr();
#endif
void initialize_for_python()
{
export_utils();
export_times();
export_amount();
export_commodity();
#if 0
export_balance();
export_value();
export_journal();
export_parser();
export_option();
export_walk();
export_format();
export_report();
export_valexpr();
#endif
}
struct python_run
{
object result;
python_run(python_interpreter_t * intepreter,
const string& str, int input_mode)
: result(handle<>(borrowed(PyRun_String(str.c_str(), input_mode,
intepreter->nspace.ptr(),
intepreter->nspace.ptr())))) {}
operator object() {
return result;
}
};
python_interpreter_t::python_interpreter_t()
: scope_t(), mmodule(borrowed(PyImport_AddModule("__main__"))),
nspace(handle<>(borrowed(PyModule_GetDict(mmodule.get()))))
{
TRACE_CTOR(python_interpreter_t, "expr_t::scope_t&");
Py_Initialize();
boost::python::detail::init_module("ledger", &initialize_for_python);
}
object python_interpreter_t::import(const string& str)
{
assert(Py_IsInitialized());
try {
PyObject * mod = PyImport_Import(PyString_FromString(str.c_str()));
if (! mod)
throw_(std::logic_error, "Failed to import Python module " << str);
object newmod(handle<>(borrowed(mod)));
#if 1
// Import all top-level entries directly into the main namespace
dict m_nspace(handle<>(borrowed(PyModule_GetDict(mod))));
nspace.update(m_nspace);
#else
nspace[string(PyModule_GetName(mod))] = newmod;
#endif
return newmod;
}
catch (const error_already_set&) {
PyErr_Print();
throw_(std::logic_error, "Importing Python module " << str);
}
return object();
}
object python_interpreter_t::eval(std::istream& in, py_eval_mode_t mode)
{
bool first = true;
string buffer;
buffer.reserve(4096);
while (! in.eof()) {
char buf[256];
in.getline(buf, 255);
if (buf[0] == '!')
break;
if (first)
first = false;
else
buffer += "\n";
buffer += buf;
}
try {
int input_mode;
switch (mode) {
case PY_EVAL_EXPR: input_mode = Py_eval_input; break;
case PY_EVAL_STMT: input_mode = Py_single_input; break;
case PY_EVAL_MULTI: input_mode = Py_file_input; break;
}
assert(Py_IsInitialized());
return python_run(this, buffer, input_mode);
}
catch (const error_already_set&) {
PyErr_Print();
throw_(std::logic_error, "Evaluating Python code");
}
return object();
}
object python_interpreter_t::eval(const string& str, py_eval_mode_t mode)
{
try {
int input_mode;
switch (mode) {
case PY_EVAL_EXPR: input_mode = Py_eval_input; break;
case PY_EVAL_STMT: input_mode = Py_single_input; break;
case PY_EVAL_MULTI: input_mode = Py_file_input; break;
}
assert(Py_IsInitialized());
return python_run(this, str, input_mode);
}
catch (const error_already_set&) {
PyErr_Print();
throw_(std::logic_error, "Evaluating Python code");
}
return object();
}
value_t python_interpreter_t::functor_t::operator()(call_scope_t& args)
{
try {
if (! PyCallable_Check(func.ptr())) {
return extract<value_t>(func.ptr());
} else {
if (args.size() > 0) {
list arglist;
if (args.value().is_sequence())
foreach (const value_t& value, args.value().as_sequence())
arglist.append(value);
else
arglist.append(args.value());
if (PyObject * val =
PyObject_CallObject(func.ptr(),
boost::python::tuple(arglist).ptr())) {
value_t result = extract<value_t>(val)();
Py_DECREF(val);
return result;
}
else if (PyObject * err = PyErr_Occurred()) {
PyErr_Print();
throw_(calc_error,
"While calling Python function '" /*<< name() <<*/ "': " << err);
} else {
assert(false);
}
} else {
return call<value_t>(func.ptr());
}
}
}
catch (const error_already_set&) {
PyErr_Print();
throw_(calc_error,
"While calling Python function '" /*<< name() <<*/ "'");
}
return NULL_VALUE;
}
value_t python_interpreter_t::lambda_t::operator()(call_scope_t& args)
{
try {
assert(args.size() == 1);
value_t item = args[0];
return call<value_t>(func.ptr(), item);
}
catch (const error_already_set&) {
PyErr_Print();
throw_(calc_error, "While evaluating Python lambda expression");
}
return NULL_VALUE;
}
} // namespace ledger
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