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File: literal_rule.ipp
// Copyright (c) 2019 Vinnie Falco (vinnie.falco@gmail.com) // // 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) // // Official repository: https://github.com/boostorg/url // #ifndef BOOST_URL_GRAMMAR_IMPL_LITERAL_RULE_IPP #define BOOST_URL_GRAMMAR_IMPL_LITERAL_RULE_IPP #include <boost/url/grammar/literal_rule.hpp> #include <boost/assert.hpp> #include <cstring> namespace boost { namespace urls { namespace grammar { auto literal_rule:: parse( char const*& it, char const* end) const noexcept -> result<value_type> { // Can't have a literal // with an empty string! BOOST_ASSERT(n_ > 0); std::size_t n = end - it; if(n >= n_) { if(std::memcmp( it, s_, n_) != 0) { // non-match BOOST_URL_RETURN_EC( error::mismatch); } it += n_; return string_view( it - n_, it); } if(n > 0) { // short input if(std::memcmp( it, s_, n) != 0) { // non-match BOOST_URL_RETURN_EC( error::mismatch); } // prefix matches BOOST_URL_RETURN_EC( error::need_more); } // end BOOST_URL_RETURN_EC( error::need_more); } } // grammar } // urls } // boost #endif