2014-08-13 10:38:35 +00:00
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// Copyright (c) 2012-2014, The CryptoNote developers, The Bytecoin developers
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//
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// This file is part of Bytecoin.
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//
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// Bytecoin is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Lesser General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// Bytecoin 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
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// GNU 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 License
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// along with Bytecoin. If not, see <http://www.gnu.org/licenses/>.
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2014-03-03 22:07:58 +00:00
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/* json_archive.h
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*
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* JSON archive */
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#pragma once
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#include "serialization.h"
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#include <cassert>
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#include <iostream>
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#include <iomanip>
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template <class Stream, bool IsSaving>
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struct json_archive_base
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{
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typedef Stream stream_type;
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typedef json_archive_base<Stream, IsSaving> base_type;
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typedef boost::mpl::bool_<IsSaving> is_saving;
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typedef const char *variant_tag_type;
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json_archive_base(stream_type &s, bool indent = false) : stream_(s), indent_(indent), object_begin(false), depth_(0) { }
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void tag(const char *tag) {
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if (!object_begin)
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stream_ << ", ";
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make_indent();
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stream_ << '"' << tag << "\": ";
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object_begin = false;
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}
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void begin_object()
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{
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stream_ << "{";
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++depth_;
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object_begin = true;
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}
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void end_object()
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{
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--depth_;
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make_indent();
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stream_ << "}";
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}
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void begin_variant() { begin_object(); }
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void end_variant() { end_object(); }
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Stream &stream() { return stream_; }
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protected:
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void make_indent()
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{
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if (indent_)
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{
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stream_ << '\n' << std::string(2 * depth_, ' ');
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}
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}
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protected:
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stream_type &stream_;
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bool indent_;
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bool object_begin;
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size_t depth_;
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};
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template <bool W>
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struct json_archive;
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template <>
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struct json_archive<true> : public json_archive_base<std::ostream, true>
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{
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json_archive(stream_type &s, bool indent = false) : base_type(s, indent) { }
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template<typename T>
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static auto promote_to_printable_integer_type(T v) -> decltype(+v)
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{
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// Unary operator '+' performs integral promotion on type T [expr.unary.op].
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// If T is signed or unsigned char, it's promoted to int and printed as number.
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return +v;
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}
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template <class T>
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void serialize_int(T v)
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{
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stream_ << std::dec << promote_to_printable_integer_type(v);
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}
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void serialize_blob(void *buf, size_t len, const char *delimiter="\"") {
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begin_string(delimiter);
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for (size_t i = 0; i < len; i++) {
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unsigned char c = ((unsigned char *)buf)[i];
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stream_ << std::hex << std::setw(2) << std::setfill('0') << (int)c;
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}
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end_string(delimiter);
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}
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template <class T>
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void serialize_varint(T &v)
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{
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stream_ << std::dec << promote_to_printable_integer_type(v);
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}
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void begin_string(const char *delimiter="\"")
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{
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stream_ << delimiter;
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}
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void end_string(const char *delimiter="\"")
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{
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stream_ << delimiter;
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}
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void begin_array(size_t s=0)
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{
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inner_array_size_ = s;
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++depth_;
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stream_ << "[ ";
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}
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void delimit_array()
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{
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stream_ << ", ";
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}
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void end_array()
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{
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--depth_;
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if (0 < inner_array_size_)
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{
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make_indent();
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}
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stream_ << "]";
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}
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void write_variant_tag(const char *t)
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{
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tag(t);
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}
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private:
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size_t inner_array_size_;
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};
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