120 lines
3.6 KiB
C++
120 lines
3.6 KiB
C++
/*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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* Copyright 2018 Danny Robson <danny@nerdcruft.net>
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*/
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#ifndef CRUFT_UTIL_CPP_HPP
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#define CRUFT_UTIL_CPP_HPP
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#include "string.hpp"
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#include "view.hpp"
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#include <experimental/filesystem>
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#include <string>
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#include <map>
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#include <stdexcept>
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#include <stack>
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namespace util::cpp {
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///////////////////////////////////////////////////////////////////////////
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struct context {
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std::stack<std::experimental::filesystem::path> source;
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std::map<std::string,std::string> defines;
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};
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///////////////////////////////////////////////////////////////////////////
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class directive {
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public:
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virtual ~directive () = default;
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virtual util::tokeniser<const char*>::iterator
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process (std::ostream&,
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context&,
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util::view<util::tokeniser<const char*>::iterator>) const = 0;
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};
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///////////////////////////////////////////////////////////////////////////
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class processor {
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public:
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processor ();
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void add (std::string token, std::unique_ptr<directive>);
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void process (std::ostream&, const std::experimental::filesystem::path&) const;
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std::experimental::filesystem::path
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resolve (const std::experimental::filesystem::path&) const;
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util::tokeniser<const char*>::iterator
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process (std::ostream&,
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context&,
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util::view<util::tokeniser<const char*>::iterator>) const;
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private:
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std::map<std::string, std::unique_ptr<directive>> m_directives;
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};
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///////////////////////////////////////////////////////////////////////////
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class unknown_directive : public std::runtime_error {
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using runtime_error::runtime_error;
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};
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///////////////////////////////////////////////////////////////////////////
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class ignore final : public directive {
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virtual util::tokeniser<const char*>::iterator
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process (std::ostream&,
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context&,
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util::view<util::tokeniser<const char*>::iterator> lines) const override
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{ return lines.begin ()++; }
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};
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//-------------------------------------------------------------------------
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class passthrough final : public directive {
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public:
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passthrough (const std::string &name);
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virtual util::tokeniser<const char*>::iterator
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process (std::ostream&,
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context&,
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util::view<util::tokeniser<const char*>::iterator>) const override;
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private:
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const std::string m_name;
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};
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//-------------------------------------------------------------------------
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class include : public directive {
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public:
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include (processor &_parent);
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void add (const std::experimental::filesystem::path&);
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virtual util::tokeniser<const char*>::iterator
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process (std::ostream&,
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context&,
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util::view<util::tokeniser<const char*>::iterator>) const override;
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private:
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processor &m_parent;
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std::vector<std::experimental::filesystem::path> m_paths;
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};
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};
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#endif
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