/****************************************************************************** * Copyright (c) 2000-2018 Ericsson Telecom AB * All rights reserved. This program and the accompanying materials * are made available under the terms of the Eclipse Public License v1.0 * which accompanies this distribution, and is available at * http://www.eclipse.org/legal/epl-v10.html * * Contributors: * Balasko, Jeno * Beres, Szabolcs * ******************************************************************************/ #ifndef CFG_PROCESS_UTILS_HH_ #define CFG_PROCESS_UTILS_HH_ #include <deque> #include <string> #include "Path2.hh" template <typename T_BUFFER_STATE> class IncludeElem { public: std::string dir; std::string fname; FILE* fp; T_BUFFER_STATE buffer_state; int line_number; IncludeElem(const std::string& fname_) : dir(Path::get_dir(fname_)), fname(Path::get_file(fname_)), fp(NULL), buffer_state(NULL), line_number(-1) { } IncludeElem(const std::string& fname_, FILE* fp_) : dir(Path::get_dir(fname_)), fname(Path::get_file(fname_)), fp(fp_), buffer_state(NULL), line_number(-1) { } bool equals(const std::string& path) const { return Path::compose(dir, fname) == path; } std::string get_full_path() const { return Path::compose(dir, fname); } }; template <typename T_BUFFER_STATE> std::string dump_include_chain(const std::deque<IncludeElem<T_BUFFER_STATE> >& chain) { std::string result; if (chain.empty()) { return result; } typename std::deque<IncludeElem<T_BUFFER_STATE> >::const_iterator it = chain.begin(); result.append(it->dir).append(it->fname); for (++it; it != chain.end(); ++it) { result.append("->"); result.append(it->dir).append(it->fname); } return result; } template <typename T_BUFFER_STATE> std::string switch_lexer(std::deque<IncludeElem<T_BUFFER_STATE> >* p_include_chain, const std::string& include_file, T_BUFFER_STATE p_current_buffer, T_BUFFER_STATE (*p_yy_create_buffer)(FILE*, int), void (*p_yy_switch_to_buffer)(T_BUFFER_STATE), int p_current_line, int p_buf_size) { if (include_file.empty()) { return std::string("Empty file name."); } std::string abs_path; if (Path::is_absolute(include_file)) { abs_path = include_file; } else { abs_path = Path::normalize(Path::compose(p_include_chain->back().dir, include_file)); } for (typename std::deque<IncludeElem<T_BUFFER_STATE> >::iterator it = p_include_chain->begin(); it != p_include_chain->end(); ++it) { if (it->equals(abs_path)) { p_include_chain->push_back(IncludeElem<T_BUFFER_STATE>(abs_path)); std::string error_msg("Circular import chain detected:\n"); error_msg.append(dump_include_chain(*p_include_chain)); p_include_chain->pop_back(); return error_msg; } } p_include_chain->back().buffer_state = p_current_buffer; p_include_chain->back().line_number = p_current_line; FILE* fp = fopen(abs_path.c_str(), "r"); if (!fp) { std::string error_msg("File not found: "); error_msg.append(abs_path); return error_msg; } IncludeElem<T_BUFFER_STATE> new_elem(abs_path, fp); p_include_chain->push_back(new_elem); new_elem.buffer_state = p_yy_create_buffer(fp, p_buf_size); p_yy_switch_to_buffer(new_elem.buffer_state); return std::string(""); } #endif