4518ea9540
old system (for example, the meaning of 'a') has yet to be restored. In the new scheme, this will be done by definition a function outside of the value expression logic, rather than the tight coupling between journal innards and value expressions that occurred in 2.x.
240 lines
6.3 KiB
C++
240 lines
6.3 KiB
C++
/*
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* Copyright (c) 2003-2008, John Wiegley. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are
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* met:
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*
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* - Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* - Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* - Neither the name of New Artisans LLC nor the names of its
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* contributors may be used to endorse or promote products derived from
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* this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "pyinterp.h"
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#include <boost/python/module_init.hpp>
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namespace ledger {
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using namespace boost::python;
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void export_utils();
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void export_times();
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void export_amount();
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void export_commodity();
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#if 0
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void export_balance();
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void export_value();
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void export_journal();
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void export_parser();
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void export_option();
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void export_walk();
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void export_report();
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void export_format();
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void export_valexpr();
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#endif
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void initialize_for_python()
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{
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export_utils();
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export_times();
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export_amount();
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export_commodity();
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#if 0
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export_balance();
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export_value();
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export_journal();
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export_parser();
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export_option();
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export_walk();
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export_format();
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export_report();
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export_valexpr();
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#endif
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}
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struct python_run
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{
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object result;
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python_run(python_interpreter_t * intepreter,
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const string& str, int input_mode)
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: result(handle<>(borrowed(PyRun_String(str.c_str(), input_mode,
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intepreter->nspace.ptr(),
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intepreter->nspace.ptr())))) {}
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operator object() {
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return result;
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}
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};
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python_interpreter_t::python_interpreter_t(expr_t::scope_t& parent)
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: expr_t::symbol_scope_t(parent),
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mmodule(borrowed(PyImport_AddModule("__main__"))),
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nspace(handle<>(borrowed(PyModule_GetDict(mmodule.get()))))
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{
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TRACE_CTOR(python_interpreter_t, "expr_t::scope_t&");
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Py_Initialize();
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boost::python::detail::init_module("ledger", &initialize_for_python);
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}
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object python_interpreter_t::import(const string& str)
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{
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assert(Py_IsInitialized());
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try {
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PyObject * mod = PyImport_Import(PyString_FromString(str.c_str()));
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if (! mod)
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throw_(std::logic_error, "Failed to import Python module " << str);
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object newmod(handle<>(borrowed(mod)));
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#if 1
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// Import all top-level entries directly into the main namespace
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dict m_nspace(handle<>(borrowed(PyModule_GetDict(mod))));
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nspace.update(m_nspace);
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#else
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nspace[string(PyModule_GetName(mod))] = newmod;
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#endif
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return newmod;
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}
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catch (const error_already_set&) {
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PyErr_Print();
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throw_(std::logic_error, "Importing Python module " << str);
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}
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return object();
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}
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object python_interpreter_t::eval(std::istream& in, py_eval_mode_t mode)
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{
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bool first = true;
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string buffer;
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buffer.reserve(4096);
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while (! in.eof()) {
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char buf[256];
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in.getline(buf, 255);
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if (buf[0] == '!')
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break;
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if (first)
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first = false;
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else
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buffer += "\n";
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buffer += buf;
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}
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try {
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int input_mode;
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switch (mode) {
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case PY_EVAL_EXPR: input_mode = Py_eval_input; break;
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case PY_EVAL_STMT: input_mode = Py_single_input; break;
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case PY_EVAL_MULTI: input_mode = Py_file_input; break;
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}
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assert(Py_IsInitialized());
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return python_run(this, buffer, input_mode);
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}
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catch (const error_already_set&) {
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PyErr_Print();
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throw_(std::logic_error, "Evaluating Python code");
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}
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return object();
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}
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object python_interpreter_t::eval(const string& str, py_eval_mode_t mode)
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{
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try {
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int input_mode;
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switch (mode) {
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case PY_EVAL_EXPR: input_mode = Py_eval_input; break;
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case PY_EVAL_STMT: input_mode = Py_single_input; break;
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case PY_EVAL_MULTI: input_mode = Py_file_input; break;
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}
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assert(Py_IsInitialized());
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return python_run(this, str, input_mode);
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}
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catch (const error_already_set&) {
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PyErr_Print();
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throw_(std::logic_error, "Evaluating Python code");
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}
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return object();
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}
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value_t python_interpreter_t::functor_t::operator()
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(expr_t::call_scope_t& args)
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{
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try {
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if (! PyCallable_Check(func.ptr())) {
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return extract<value_t>(func.ptr());
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} else {
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if (args.size() > 0) {
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list arglist;
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if (args.value().is_sequence())
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foreach (const value_t& value, args.value().as_sequence())
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arglist.append(value);
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else
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arglist.append(args.value());
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if (PyObject * val =
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PyObject_CallObject(func.ptr(),
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boost::python::tuple(arglist).ptr())) {
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value_t result = extract<value_t>(val)();
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Py_DECREF(val);
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return result;
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}
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else if (PyObject * err = PyErr_Occurred()) {
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PyErr_Print();
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throw_(expr_t::calc_error,
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"While calling Python function '" /*<< name() <<*/ "': " << err);
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} else {
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assert(false);
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}
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} else {
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return call<value_t>(func.ptr());
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}
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}
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}
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catch (const error_already_set&) {
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PyErr_Print();
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throw_(expr_t::calc_error,
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"While calling Python function '" /*<< name() <<*/ "'");
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}
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return NULL_VALUE;
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}
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value_t python_interpreter_t::lambda_t::operator()
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(expr_t::call_scope_t& args)
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{
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try {
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assert(args.size() == 1);
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value_t item = args[0];
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assert(item.is_xml_node());
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return call<value_t>(func.ptr(), item.as_xml_node());
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}
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catch (const error_already_set&) {
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PyErr_Print();
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throw_(expr_t::calc_error,
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"While evaluating Python lambda expression");
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}
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return NULL_VALUE;
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}
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} // namespace ledger
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