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/******************************************************************************
* 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 v2.0
* which accompanies this distribution, and is available at
* https://www.eclipse.org/org/documents/epl-2.0/EPL-2.0.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
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