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//
// Copyright (c) 2005 João Abecasis
//
// Distributed under the Boost Software License, Version 1.0. (See
// accompanying file LICENSE_1_0.txt or copy at
// http://www.boost.org/LICENSE_1_0.txt)
//
#include <cstring>
#include <fstream>
#include <iostream>
#include <iterator>
#include <vector>
#include <boost/spirit/include/classic_primitives.hpp>
#include <boost/spirit/include/classic_scanner.hpp>
namespace spirit = boost::spirit::classic;
typedef std::istream_iterator<char, char> iterator;
typedef spirit::scanner<iterator> scanner;
int main(int argc, char* argv[])
{
std::vector<char*> args;
bool usage_error = false;
for (int i = 1; i < argc; ++i) {
if (std::strncmp(argv[i], "--", 2) == 0) {
if (strcmp(argv[i], "--strict") == 0) {
// Ignore --strict because the build file accidentally
// uses it. Why yes, this is a horrible hack.
}
else {
std::cerr << "ERROR: Invalid flag: " << argv[i] << std::endl;
usage_error = true;
}
}
else {
args.push_back(argv[i]);
}
}
if (!usage_error && args.size() != 2) {
std::cerr << "ERROR: Wrong number of arguments." << std::endl;
usage_error = true;
}
if (usage_error) {
std::cout << "Usage:\n\t" << argv[0] << " file1 file2" << std::endl;
return 1;
}
std::ifstream file1(args[0], std::ios_base::binary | std::ios_base::in),
file2(args[1], std::ios_base::binary | std::ios_base::in);
if (!file1 || !file2) {
std::cerr << "ERROR: Unable to open one or both files." << std::endl;
return 2;
}
file1.unsetf(std::ios_base::skipws);
file2.unsetf(std::ios_base::skipws);
iterator iter_file1(file1), iter_file2(file2);
scanner scan1(iter_file1, iterator()), scan2(iter_file2, iterator());
std::size_t line = 1, column = 1;
while (!scan1.at_end() && !scan2.at_end()) {
if (spirit::eol_p.parse(scan1)) {
if (!spirit::eol_p.parse(scan2)) {
std::cout << "Files differ at line " << line << ", column "
<< column << '.' << std::endl;
return 3;
}
++line, column = 1;
continue;
}
if (*scan1 != *scan2) {
std::cout << "Files differ at line " << line << ", column "
<< column << '.' << std::endl;
return 4;
}
++scan1, ++scan2, ++column;
}
if (scan1.at_end() != scan2.at_end()) {
std::cout << "Files differ in length." << std::endl;
return 5;
}
}
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