preprocessor/src/MacroExpandModFile.cc

77 lines
3.2 KiB
C++

/*
* Copyright © 2015-2023 Dynare Team
*
* This file is part of Dynare.
*
* Dynare is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* Dynare is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with Dynare. If not, see <https://www.gnu.org/licenses/>.
*/
#include <algorithm>
#include <filesystem>
#include <fstream>
#include <regex>
#include <sstream>
#include "macro/Driver.hh"
stringstream
macroExpandModFile(const filesystem::path& filename, const istream& modfile, bool debug,
bool save_macro, filesystem::path save_macro_file, bool line_macro,
const vector<pair<string, string>>& defines, vector<filesystem::path> paths)
{
// Do macro processing
stringstream macro_output;
macro::Environment env = macro::Environment();
macro::Driver m;
/* Calling string() method on filename: not necessary on GNU/Linux and macOS because there is an
implicit conversion from filesystem:path to string (i.e. basic_string<char>), but needed on
Windows because the implicit conversion is only to wstring (i.e. basic_string<wchar_t>). */
m.parse(filename.string(), modfile, debug, defines, env, paths, macro_output);
if (save_macro)
{
if (save_macro_file.empty())
save_macro_file = filename.stem().string() + "-macroexp.mod";
ofstream macro_output_file {save_macro_file};
if (macro_output_file.fail())
{
cerr << "Cannot open " << save_macro_file.string() << " for macro output" << endl;
exit(EXIT_FAILURE);
}
string str(macro_output.str());
if (!line_macro)
{
/* Remove the @#line directives.
Unfortunately GCC 11 does not yet support std::regex::multiline
(despite it being in the C++17 standard), so we are forced to use
a trick to emulate the “usual” behaviour of the caret ^;
here, the latter only matches the beginning of file.
This also means that we are forced to remove the EOL before the
@#line, and not the one after it (matching the EOL before and the
EOL after in the same regexp does not work). */
str = regex_replace(str, regex(R"((^|\r?\n)@#line.*)"), "");
/* Remove the EOLs at the beginning of the output, the first one
being a remnant of the first @#line directive. */
str = regex_replace(str, regex(R"(^(\r?\n)+)"), "");
/* Replace sequences of several newlines by a single newline (in
both LF and CR+LF conventions). */
str = regex_replace(str, regex(R"(\n{2,})"), "\n");
str = regex_replace(str, regex(R"((\r\n){2,})"), "\r\n");
}
macro_output_file << str;
macro_output_file.close();
}
return macro_output;
}