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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"
-
-namespace ledger {
-
-using namespace python;
-
-shared_ptr<python_interpreter_t> python_session;
-
-void export_amount();
-void export_balance();
-void export_chain();
-void export_commodity();
-void export_xact();
-void export_expr();
-void export_flags();
-void export_format();
-void export_global();
-void export_item();
-void export_journal();
-void export_report();
-void export_scope();
-void export_session();
-void export_timelog();
-void export_times();
-void export_utils();
-void export_value();
-void export_post();
-
-void initialize_for_python()
-{
- export_amount();
- export_balance();
- export_chain();
- export_commodity();
- export_xact();
- export_expr();
- export_flags();
- export_format();
- export_global();
- export_item();
- export_journal();
- export_report();
- export_scope();
- export_session();
- export_timelog();
- export_times();
- export_utils();
- export_value();
- export_post();
-}
-
-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->main_nspace.ptr(),
- intepreter->main_nspace.ptr())))) {}
- operator object() {
- return result;
- }
-};
-
-void python_interpreter_t::initialize()
-{
- TRACE_START(python_init, 1, "Initialized Python");
-
- try {
- DEBUG("python.interp", "Initializing Python");
-
- Py_Initialize();
- assert(Py_IsInitialized());
-
- object main_module = python::import("__main__");
- if (! main_module)
- throw_(std::logic_error, "Python failed to initialize");
-
- main_nspace = extract<dict>(main_module.attr("__dict__"));
- if (! main_nspace)
- throw_(std::logic_error, "Python failed to initialize");
-
- python::detail::init_module("ledger", &initialize_for_python);
-
- is_initialized = true;
- }
- catch (const error_already_set&) {
- PyErr_Print();
- throw_(std::logic_error, "Python failed to initialize");
- }
-
- TRACE_FINISH(python_init, 1);
-}
-
-object python_interpreter_t::import(const string& str)
-{
- if (! is_initialized)
- initialize();
-
- try {
- TRACE_START(python_import, 1, "Imported Python module: " << str);
-
- object mod = python::import(str.c_str());
- if (! mod)
- throw_(std::logic_error, "Failed to import Python module " << str);
-
- // Import all top-level xacts directly into the main namespace
- main_nspace.update(mod.attr("__dict__"));
-
- TRACE_FINISH(python_import, 1);
-
- return mod;
- }
- catch (const error_already_set&) {
- PyErr_Print();
- }
- 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;
- }
-
- if (! is_initialized)
- initialize();
-
- 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;
- }
-
- return python_run(this, buffer, input_mode);
- }
- catch (const error_already_set&) {
- PyErr_Print();
- throw_(std::logic_error, "Failed to evaluate Python code");
- }
- return object();
-}
-
-object python_interpreter_t::eval(const string& str, py_eval_mode_t mode)
-{
- if (! is_initialized)
- initialize();
-
- 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;
- }
-
- return python_run(this, str, input_mode);
- }
- catch (const error_already_set&) {
- PyErr_Print();
- throw_(std::logic_error, "Failed to evaluate Python code");
- }
- return object();
-}
-
-expr_t::ptr_op_t python_interpreter_t::lookup(const string& name)
-{
- // Give our superclass first dibs on symbol definitions
- if (expr_t::ptr_op_t op = session_t::lookup(name))
- return op;
-
- const char * p = name.c_str();
- switch (*p) {
- case 'o':
- if (std::strncmp(p, "opt_", 4) == 0) {
- p = p + 4;
- switch (*p) {
- case 'i':
- if (std::strcmp(p, "import_") == 0)
- return MAKE_FUNCTOR(python_interpreter_t::option_import_);
- else if (std::strcmp(p, "import") == 0)
- return expr_t::ptr_op_t();
- break;
- }
- }
- break;
- }
-
- if (is_initialized && main_nspace.has_key(name.c_str())) {
- DEBUG("python.interp", "Python lookup: " << name);
-
- if (python::object obj = main_nspace.get(name.c_str()))
- return WRAP_FUNCTOR(functor_t(name, obj));
- }
-
- return NULL;
-}
-
-value_t python_interpreter_t::functor_t::operator()(call_scope_t& args)
-{
- try {
- if (! PyCallable_Check(func.ptr())) {
- extract<value_t> val(func);
- if (val.check())
- return val();
- throw_(calc_error,
- "Could not evaluate Python variable '" << name << "'");
- } 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(), python::tuple(arglist).ptr())) {
- extract<value_t> xval(val);
- value_t result;
- if (xval.check()) {
- result = xval();
- Py_DECREF(val);
- } else {
- Py_DECREF(val);
- throw_(calc_error,
- "Could not evaluate Python variable '" << name << "'");
- }
- return result;
- }
- else if (PyErr_Occurred()) {
- PyErr_Print();
- throw_(calc_error, "Failed call to Python function '" << name << "'");
- } else {
- assert(false);
- }
- } else {
- return call<value_t>(func.ptr());
- }
- }
- }
- catch (const error_already_set&) {
- PyErr_Print();
- throw_(calc_error,
- "Failed call to Python function '" << name << "'");
- }
- return NULL_VALUE;
-}
-
-} // namespace ledger
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