1 files changed, 145 insertions, 0 deletions
diff --git a/src/serialization/json_archive.h b/src/serialization/json_archive.h
new file mode 100644
index 000000000..49ad74d41
--- /dev/null
+++ b/src/serialization/json_archive.h
@@ -0,0 +1,145 @@
+// Copyright (c) 2012-2013 The Cryptonote developers
+// Distributed under the MIT/X11 software license, see the accompanying
+// file COPYING or http://www.opensource.org/licenses/mit-license.php.
+
+/* json_archive.h
+ *
+ * JSON archive */
+
+#pragma once
+
+#include "serialization.h"
+#include <cassert>
+#include <iostream>
+#include <iomanip>
+
+template <class Stream, bool IsSaving>
+struct json_archive_base
+{
+  typedef Stream stream_type;
+  typedef json_archive_base<Stream, IsSaving> base_type;
+  typedef boost::mpl::bool_<IsSaving> is_saving;
+
+  typedef const char *variant_tag_type;
+
+  json_archive_base(stream_type &s, bool indent = false) : stream_(s), indent_(indent), object_begin(false), depth_(0) { }
+
+  void tag(const char *tag) {
+    if (!object_begin)
+      stream_ << ", ";
+    make_indent();
+    stream_ << '"' << tag << "\": ";
+    object_begin = false;
+  }
+
+  void begin_object()
+  {
+    stream_ << "{";
+    ++depth_;
+    object_begin = true;
+  }
+
+  void end_object()
+  {
+    --depth_;
+    make_indent();
+    stream_ << "}";
+  }
+
+  void begin_variant() { begin_object(); }
+  void end_variant() { end_object(); }
+  Stream &stream() { return stream_; }
+
+protected:
+  void make_indent()
+  {
+    if (indent_)
+    {
+      stream_ << '\n' << std::string(2 * depth_, ' ');
+    }
+  }
+
+protected:
+  stream_type &stream_;
+  bool indent_;
+  bool object_begin;
+  size_t depth_;
+};
+
+template <bool W>
+struct json_archive;
+
+template <>
+struct json_archive<true> : public json_archive_base<std::ostream, true>
+{
+  json_archive(stream_type &s, bool indent = false) : base_type(s, indent) { }
+
+  template<typename T>
+  static auto promote_to_printable_integer_type(T v) -> decltype(+v)
+  {
+    // Unary operator '+' performs integral promotion on type T [expr.unary.op].
+    // If T is signed or unsigned char, it's promoted to int and printed as number.
+    return +v;
+  }
+
+  template <class T>
+  void serialize_int(T v)
+  {
+    stream_ << std::dec << promote_to_printable_integer_type(v);
+  }
+
+  void serialize_blob(void *buf, size_t len, const char *delimiter="\"") {
+    begin_string(delimiter);
+    for (size_t i = 0; i < len; i++) {
+      unsigned char c = ((unsigned char *)buf)[i];
+      stream_ << std::hex << std::setw(2) << std::setfill('0') << (int)c;
+    }
+    end_string(delimiter);
+  }
+
+  template <class T>
+  void serialize_varint(T &v)
+  {
+    stream_ << std::dec << promote_to_printable_integer_type(v);
+  }
+
+  void begin_string(const char *delimiter="\"")
+  {
+    stream_ << delimiter;
+  }
+
+  void end_string(const char *delimiter="\"")
+  {
+    stream_ << delimiter;
+  }
+
+  void begin_array(size_t s=0)
+  {
+    inner_array_size_ = s;
+    ++depth_;
+    stream_ << "[ ";
+  }
+
+  void delimit_array()
+  {
+    stream_ << ", ";
+  }
+
+  void end_array()
+  {
+    --depth_;
+    if (0 < inner_array_size_)
+    {
+      make_indent();
+    }
+    stream_ << "]";
+  }
+
+  void write_variant_tag(const char *t)
+  {
+    tag(t);
+  }
+
+private:
+  size_t inner_array_size_;
+};