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//
// Copyright (C) 2005 Stefan Seefeld
// All rights reserved.
// Licensed to the public under the terms of the GNU LGPL (>= 2),
// see the file COPYING for details.
//
#include <Synopsis/AST/ASTKit.hh>
#include <Synopsis/Python/Module.hh>
#include <Synopsis/Trace.hh>
#include <Support/ErrorHandler.hh>
#include "ASTTranslator.hh"
#include <memory>
using namespace Synopsis;
namespace wave = boost::wave;
namespace
{
#ifdef __WIN32__
std::string const trash = "NUL";
#else
std::string const trash = "/dev/null";
#endif
PyObject *error;
//. Override unexpected() to print a message before we abort
void unexpected()
{
std::cout << "Error: Aborting due to unexpected exception." << std::endl;
throw std::bad_exception();
}
bool extract(PyObject *py_flags, std::vector<char const *> &out)
{
Py_INCREF(py_flags);
Python::List list = Python::Object(py_flags);
for (size_t i = 0; i != list.size(); ++i)
{
char const *value = Python::Object::narrow<char const *>(list.get(i));
if (!value) return false;
out.push_back(value);
}
return true;
}
PyObject *parse(PyObject *self, PyObject *args)
{
char const *input_file;
char const *base_path;
char const *output_file;
char const *language;
PyObject *py_flags;
std::vector<char const *> flags;
PyObject *py_ast;
int main_file_only = 0;
int verbose = 0;
int debug = 0;
if (!PyArg_ParseTuple(args, "OszzsO!iii",
&py_ast,
&input_file,
&base_path,
&output_file,
&language,
&PyList_Type, &py_flags,
&main_file_only,
&verbose,
&debug)
|| !extract(py_flags, flags))
return 0;
Py_INCREF(error);
std::auto_ptr<Python::Object> error_type(new Python::Object(error));
Py_INCREF(py_ast);
AST::AST ast(py_ast);
Py_INCREF(py_ast);
std::set_unexpected(unexpected);
ErrorHandler error_handler();
if (debug) Synopsis::Trace::enable(Trace::ALL);
if (!input_file || *input_file == '\0')
{
PyErr_SetString(PyExc_RuntimeError, "no input file");
return 0;
}
try
{
std::ifstream ifs(input_file);
std::ofstream ofs(output_file ? output_file : trash.c_str());
std::string input(std::istreambuf_iterator<char>(ifs.rdbuf()),
std::istreambuf_iterator<char>());
typedef wave::cpplexer::lex_iterator<Token> lex_iterator_type;
typedef wave::context<std::string::iterator,
lex_iterator_type,
wave::iteration_context_policies::load_file_to_string,
ASTTranslator> context_type;
context_type ctx(input.begin(), input.end(), input_file,
ASTTranslator(language, input_file, base_path, main_file_only,
ast, verbose, debug));
if (std::string(language) == "C")
{
ctx.set_language(wave::support_c99);
// Remove the '__STDC_HOSTED__' macro as wave predefines it.
flags.erase(std::remove(flags.begin(), flags.end(),
std::string("-D__STDC_HOSTED__=1")),
flags.end());
}
else
{
ctx.set_language(wave::enable_variadics(ctx.get_language()));
// FIXME: should only enable in GCC compat mode.
ctx.set_language(wave::enable_long_long(ctx.get_language()));
// Remove the '__cplusplus' macro as wave predefines it.
flags.erase(std::remove(flags.begin(), flags.end(),
std::string("-D__cplusplus=1")),
flags.end());
}
ctx.set_language(wave::enable_preserve_comments(ctx.get_language()));
for (std::vector<char const *>::iterator i = flags.begin();
i != flags.end();
++i)
{
if (**i == '-')
{
if (*(*i + 1) == 'I')
{
ctx.add_include_path(*i + 2);
ctx.add_sysinclude_path(*i + 2);
}
else if (*(*i + 1) == 'D')
ctx.add_macro_definition(*i + 2, true);
else if (*(*i + 1) == 'U')
ctx.remove_macro_definition(*i + 2);
}
}
context_type::iterator_type first = ctx.begin();
context_type::iterator_type last = ctx.end();
while (first != last)
{
ofs << (*first).get_value();
++first;
}
}
catch (wave::cpp_exception &e)
{
// some preprocessing error
std::cerr << e.file_name() << "(" << e.line_no() << "): "
<< e.description() << std::endl;
Python::Object py_e((*error_type)());
py_e.set_attr("file_name", e.file_name());
py_e.set_attr("line_no", e.line_no());
py_e.set_attr("description", e.description());
PyErr_SetObject(error, py_e.ref());
return 0;
}
catch (wave::cpplexer::lexing_exception &e)
{
// some lexing error
std::cerr << e.file_name() << "(" << e.line_no() << "): "
<< e.description() << std::endl;
Python::Object py_e((*error_type)());
py_e.set_attr("file_name", e.file_name());
py_e.set_attr("line_no", e.line_no());
py_e.set_attr("description", e.description());
PyErr_SetObject(error, py_e.ref());
return 0;
}
catch (std::exception const &e)
{
std::cerr << "Caught exception : " << e.what() << std::endl;
Python::Object py_e((*error_type)());
py_e.set_attr("file_name", "");
py_e.set_attr("line_no", -1);
py_e.set_attr("description", e.what());
PyErr_SetObject(error, py_e.ref());
return 0;
}
return py_ast;
}
PyMethodDef methods[] = {{(char*)"parse", parse, METH_VARARGS},
{0, 0}};
}
extern "C" void initwave()
{
Python::Module module = Python::Module::define("wave", methods);
module.set_attr("version", "0.1");
Python::Object processor = Python::Object::import("Synopsis.Processor");
Python::Object error_base = processor.attr("Error");
error = PyErr_NewException("wave.PreprocessError", error_base.ref(), 0);
module.set_attr("PreprocessError", error);
}
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