mirror of
https://github.com/djcb/mu.git
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9f93526884
Move the parser utils to utils/ and rename the Mux namespace into Mu.
156 lines
3.6 KiB
C++
156 lines
3.6 KiB
C++
/*
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** Copyright (C) 2017 Dirk-Jan C. Binnema <djcb@djcbsoftware.nl>
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**
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** This library is free software; you can redistribute it and/or
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** modify it under the terms of the GNU Lesser General Public License
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** as published by the Free Software Foundation; either version 2.1
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** of the License, or (at your option) any later version.
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**
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** This library is distributed in the hope that it will be useful,
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** but WITHOUT ANY WARRANTY; without even the implied warranty of
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** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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** Lesser General Public License for more details.
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**
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** You should have received a copy of the GNU Lesser General Public
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** License along with this library; if not, write to the Free
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** Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA
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** 02110-1301, USA.
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*/
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#ifndef __DATA_HH__
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#define __DATA_HH__
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#include <string>
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#include <iostream>
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#include <regex>
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#include <utils//mu-utils.hh>
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namespace Mu {
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// class representing some data item; either a Value or a Range a Value can still be a Regex (but
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// that's not a separate type here)
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struct Data {
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enum class Type { Value, Range };
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virtual ~Data() = default;
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Type type; /**< type of data */
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std::string field; /**< full name of the field */
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std::string prefix; /**< Xapian prefix for thef field */
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unsigned id; /**< Xapian value no for the field */
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protected:
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Data (Type _type, const std::string& _field, const std::string& _prefix,
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unsigned _id): type(_type), field(_field), prefix(_prefix), id(_id) {}
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};
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/**
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* operator<<
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*
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* @param os an output stream
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* @param t a data type
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*
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* @return the updated output stream
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*/
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inline std::ostream&
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operator<< (std::ostream& os, Data::Type t)
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{
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switch (t) {
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case Data::Type::Value: os << "value"; break;
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case Data::Type::Range: os << "range"; break;
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default: os << "bug"; break;
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}
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return os;
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}
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/**
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* Range type -- [a..b]
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*/
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struct Range: public Data {
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/**
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* Construct a range
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*
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* @param _field the field
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* @param _prefix the xapian prefix
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* @param _id xapian value number
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* @param _lower lower bound
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* @param _upper upper bound
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*/
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Range (const std::string& _field, const std::string& _prefix,
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unsigned _id,
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const std::string& _lower,const std::string& _upper):
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Data(Data::Type::Range, _field, _prefix, _id),
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lower(_lower), upper(_upper) {}
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std::string lower; /**< lower bound */
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std::string upper; /**< upper bound */
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};
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/**
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* Basic value
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*
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*/
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struct Value: public Data {
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/**
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* Construct a Value
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*
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* @param _field the field
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* @param _prefix the xapian prefix
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* @param _id xapian value number
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* @param _value the value
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*/
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Value (const std::string& _field, const std::string& _prefix,
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unsigned _id, const std::string& _value, bool _phrase = false):
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Data(Value::Type::Value, _field, _prefix, _id),
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value(_value), phrase(_phrase) {}
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std::string value; /**< the value */
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bool phrase;
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};
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/**
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* operator<<
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*
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* @param os an output stream
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* @param v a data ptr
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*
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* @return the updated output stream
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*/
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inline std::ostream&
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operator<< (std::ostream& os, const std::unique_ptr<Data>& v)
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{
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switch (v->type) {
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case Data::Type::Value: {
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const auto bval = dynamic_cast<Value*> (v.get());
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os << ' ' << quote(v->field) << ' '
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<< quote(utf8_flatten(bval->value));
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if (bval->phrase)
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os << " (ph)";
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break;
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}
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case Data::Type::Range: {
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const auto rval = dynamic_cast<Range*> (v.get());
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os << ' ' << quote(v->field) << ' '
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<< quote(rval->lower) << ' '
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<< quote(rval->upper);
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break;
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}
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default:
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os << "unexpected type";
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break;
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}
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return os;
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}
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} // namespace Mu
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#endif /* __DATA_HH__ */
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