You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
146 lines
3.9 KiB
146 lines
3.9 KiB
//
|
|
// peglint.cc
|
|
//
|
|
// Copyright (c) 2015 Yuji Hirose. All rights reserved.
|
|
// MIT License
|
|
//
|
|
|
|
#include <peglib.h>
|
|
#include <fstream>
|
|
|
|
using namespace std;
|
|
|
|
bool read_file(const char* path, vector<char>& buff)
|
|
{
|
|
ifstream ifs(path, ios::in | ios::binary);
|
|
if (ifs.fail()) {
|
|
return false;
|
|
}
|
|
|
|
buff.resize(static_cast<unsigned int>(ifs.seekg(0, ios::end).tellg()));
|
|
if (!buff.empty()) {
|
|
ifs.seekg(0, ios::beg).read(&buff[0], static_cast<streamsize>(buff.size()));
|
|
}
|
|
return true;
|
|
}
|
|
|
|
int main(int argc, const char** argv)
|
|
{
|
|
auto opt_ast = false;
|
|
auto opt_optimize_ast_nodes = false;
|
|
auto opt_help = false;
|
|
auto opt_source = false;
|
|
vector<char> source;
|
|
auto opt_trace = false;
|
|
vector<const char*> path_list;
|
|
|
|
auto argi = 1;
|
|
while (argi < argc) {
|
|
auto arg = argv[argi++];
|
|
if (string("--help") == arg) {
|
|
opt_help = true;
|
|
} else if (string("--ast") == arg) {
|
|
opt_ast = true;
|
|
} else if (string("--optimize_ast_nodes") == arg || string("--opt") == arg) {
|
|
opt_optimize_ast_nodes = true;
|
|
} else if (string("--source") == arg) {
|
|
opt_source = true;
|
|
if (argi < argc) {
|
|
std::string text = argv[argi++];
|
|
source.assign(text.begin(), text.end());
|
|
}
|
|
} else if (string("--trace") == arg) {
|
|
opt_trace = true;
|
|
} else {
|
|
path_list.push_back(arg);
|
|
}
|
|
}
|
|
|
|
if (path_list.empty() || opt_help) {
|
|
cerr << "usage: peglint [--ast] [--optimize_ast_nodes|--opt] [--source text] [--trace] [grammar file path] [source file path]" << endl;
|
|
return 1;
|
|
}
|
|
|
|
// Check PEG grammar
|
|
auto syntax_path = path_list[0];
|
|
|
|
vector<char> syntax;
|
|
if (!read_file(syntax_path, syntax)) {
|
|
cerr << "can't open the grammar file." << endl;
|
|
return -1;
|
|
}
|
|
|
|
peg::parser parser;
|
|
|
|
parser.log = [&](size_t ln, size_t col, const string& msg) {
|
|
cerr << syntax_path << ":" << ln << ":" << col << ": " << msg << endl;
|
|
};
|
|
|
|
if (!parser.load_grammar(syntax.data(), syntax.size())) {
|
|
return -1;
|
|
}
|
|
|
|
if (path_list.size() < 2 && !opt_source) {
|
|
return 0;
|
|
}
|
|
|
|
// Check source
|
|
std::string source_path = "[commendline]";
|
|
if (path_list.size() >= 2) {
|
|
if (!read_file(path_list[1], source)) {
|
|
cerr << "can't open the code file." << endl;
|
|
return -1;
|
|
}
|
|
source_path = path_list[1];
|
|
}
|
|
|
|
parser.log = [&](size_t ln, size_t col, const string& msg) {
|
|
cerr << source_path << ":" << ln << ":" << col << ": " << msg << endl;
|
|
};
|
|
|
|
if (opt_trace) {
|
|
std::cout << "pos:lev\trule/ope" << std::endl;
|
|
std::cout << "-------\t--------" << std::endl;
|
|
size_t prev_pos = 0;
|
|
parser.enable_trace([&](
|
|
const char* name,
|
|
const char* s,
|
|
size_t /*n*/,
|
|
const peg::SemanticValues& /*sv*/,
|
|
const peg::Context& c,
|
|
const peg::any& /*dt*/) {
|
|
auto pos = static_cast<size_t>(s - c.s);
|
|
auto backtrack = (pos < prev_pos ? "*" : "");
|
|
string indent;
|
|
auto level = c.nest_level;
|
|
while (level--) {
|
|
indent += " ";
|
|
}
|
|
std::cout
|
|
<< pos << ":" << c.nest_level << backtrack << "\t"
|
|
<< indent << name << std::endl;
|
|
prev_pos = static_cast<size_t>(pos);
|
|
});
|
|
}
|
|
|
|
if (opt_ast) {
|
|
parser.enable_ast();
|
|
|
|
std::shared_ptr<peg::Ast> ast;
|
|
if (!parser.parse_n(source.data(), source.size(), ast)) {
|
|
return -1;
|
|
}
|
|
|
|
ast = peg::AstOptimizer(opt_optimize_ast_nodes).optimize(ast);
|
|
std::cout << peg::ast_to_s(ast);
|
|
|
|
} else {
|
|
if (!parser.parse_n(source.data(), source.size())) {
|
|
return -1;
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
// vim: et ts=4 sw=4 cin cino={1s ff=unix
|
|
|