| /*============================================================================= |
| Copyright (c) 2001-2010 Joel de Guzman |
| |
| 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 <boost/config/warning_disable.hpp> |
| |
| #include <input/sexpr.hpp> |
| #include <input/parse_sexpr_impl.hpp> |
| #include <scheme/compiler.hpp> |
| #include <utree/io.hpp> |
| #include <fstream> |
| |
| int check_file(std::ifstream& in, char const* filename) |
| { |
| if (!in) |
| { |
| std::cerr << filename << " not found" << std::endl; |
| return -1; |
| } |
| |
| // Ignore the BOM marking the beginning of a UTF-8 file in Windows |
| char c = in.peek(); |
| if (c == '\xef') |
| { |
| char s[3]; |
| in >> s[0] >> s[1] >> s[2]; |
| s[3] = '\0'; |
| if (s != std::string("\xef\xbb\xbf")) |
| { |
| std::cerr << "Error: Unexpected characters from input file: " |
| << filename << std::endl; |
| return -1; |
| } |
| } |
| return 0; |
| } |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| // Main program |
| /////////////////////////////////////////////////////////////////////////////// |
| int main(int argc, char **argv) |
| { |
| char const* filename = filename = argv[1]; |
| std::ifstream in(filename, std::ios_base::in); |
| if (check_file(in, filename) != 0) |
| return -1; |
| |
| scheme::interpreter program(in, filename); |
| scheme::function main_ = program["main"]; |
| if (!main_.empty()) |
| main_(); // call main |
| return 0; |
| } |
| |
| |