From 1d055261b4144dbf86b2658437015b15d4dd9bff Mon Sep 17 00:00:00 2001
From: Richard <q@1bpm.net>
Date: Sun, 4 Sep 2022 00:32:56 +0100
Subject: initial

---
 include/jsoncons_ext/ubjson/decode_ubjson.hpp | 201 ++++++++++++++++++++++++++
 1 file changed, 201 insertions(+)
 create mode 100644 include/jsoncons_ext/ubjson/decode_ubjson.hpp

(limited to 'include/jsoncons_ext/ubjson/decode_ubjson.hpp')

diff --git a/include/jsoncons_ext/ubjson/decode_ubjson.hpp b/include/jsoncons_ext/ubjson/decode_ubjson.hpp
new file mode 100644
index 0000000..91c9c0f
--- /dev/null
+++ b/include/jsoncons_ext/ubjson/decode_ubjson.hpp
@@ -0,0 +1,201 @@
+// Copyright 2013 Daniel Parker
+// Distributed under the Boost license, Version 1.0.
+// (See accompanying file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
+
+// See https://github.com/danielaparker/jsoncons for latest version
+
+#ifndef JSONCONS_UBJSON_DECODE_UBJSON_HPP
+#define JSONCONS_UBJSON_DECODE_UBJSON_HPP
+
+#include <string>
+#include <vector>
+#include <memory>
+#include <type_traits> // std::enable_if
+#include <istream> // std::basic_istream
+#include <jsoncons/json.hpp>
+#include <jsoncons/config/jsoncons_config.hpp>
+#include <jsoncons_ext/ubjson/ubjson_reader.hpp>
+#include <jsoncons_ext/ubjson/ubjson_cursor.hpp>
+
+namespace jsoncons { 
+namespace ubjson {
+
+    template<class T, class Source>
+    typename std::enable_if<type_traits::is_basic_json<T>::value &&
+                            type_traits::is_byte_sequence<Source>::value,T>::type 
+    decode_ubjson(const Source& v, 
+                  const ubjson_decode_options& options = ubjson_decode_options())
+    {
+        jsoncons::json_decoder<T> decoder;
+        auto adaptor = make_json_visitor_adaptor<json_visitor>(decoder);
+        basic_ubjson_reader<jsoncons::bytes_source> reader(v, adaptor, options);
+        reader.read();
+        if (!decoder.is_valid())
+        {
+            JSONCONS_THROW(ser_error(conv_errc::conversion_failed, reader.line(), reader.column()));
+        }
+        return decoder.get_result();
+    }
+
+    template<class T, class Source>
+    typename std::enable_if<!type_traits::is_basic_json<T>::value &&
+                            type_traits::is_byte_sequence<Source>::value,T>::type 
+    decode_ubjson(const Source& v, 
+                  const ubjson_decode_options& options = ubjson_decode_options())
+    {
+        basic_ubjson_cursor<bytes_source> cursor(v, options);
+        json_decoder<basic_json<char,sorted_policy>> decoder{};
+
+        std::error_code ec;
+        T val = decode_traits<T,char>::decode(cursor, decoder, ec);
+        if (ec)
+        {
+            JSONCONS_THROW(ser_error(ec, cursor.context().line(), cursor.context().column()));
+        }
+        return val;
+    }
+
+    template<class T>
+    typename std::enable_if<type_traits::is_basic_json<T>::value,T>::type 
+    decode_ubjson(std::istream& is, 
+                  const ubjson_decode_options& options = ubjson_decode_options())
+    {
+        jsoncons::json_decoder<T> decoder;
+        auto adaptor = make_json_visitor_adaptor<json_visitor>(decoder);
+        ubjson_stream_reader reader(is, adaptor, options);
+        reader.read();
+        if (!decoder.is_valid())
+        {
+            JSONCONS_THROW(ser_error(conv_errc::conversion_failed, reader.line(), reader.column()));
+        }
+        return decoder.get_result();
+    }
+
+    template<class T>
+    typename std::enable_if<!type_traits::is_basic_json<T>::value,T>::type 
+    decode_ubjson(std::istream& is, 
+                  const ubjson_decode_options& options = ubjson_decode_options())
+    {
+        basic_ubjson_cursor<binary_stream_source> cursor(is, options);
+        json_decoder<basic_json<char,sorted_policy>> decoder{};
+
+        std::error_code ec;
+        T val = decode_traits<T,char>::decode(cursor, decoder, ec);
+        if (ec)
+        {
+            JSONCONS_THROW(ser_error(ec, cursor.context().line(), cursor.context().column()));
+        }
+        return val;
+    }
+
+    template<class T, class InputIt>
+    typename std::enable_if<type_traits::is_basic_json<T>::value,T>::type 
+    decode_ubjson(InputIt first, InputIt last,
+                const ubjson_decode_options& options = ubjson_decode_options())
+    {
+        jsoncons::json_decoder<T> decoder;
+        auto adaptor = make_json_visitor_adaptor<json_visitor>(decoder);
+        basic_ubjson_reader<binary_iterator_source<InputIt>> reader(binary_iterator_source<InputIt>(first, last), adaptor, options);
+        reader.read();
+        if (!decoder.is_valid())
+        {
+            JSONCONS_THROW(ser_error(conv_errc::conversion_failed, reader.line(), reader.column()));
+        }
+        return decoder.get_result();
+    }
+
+    template<class T, class InputIt>
+    typename std::enable_if<!type_traits::is_basic_json<T>::value,T>::type 
+    decode_ubjson(InputIt first, InputIt last,
+                const ubjson_decode_options& options = ubjson_decode_options())
+    {
+        basic_ubjson_cursor<binary_iterator_source<InputIt>> cursor(binary_iterator_source<InputIt>(first, last), options);
+        json_decoder<basic_json<char,sorted_policy>> decoder{};
+
+        std::error_code ec;
+        T val = decode_traits<T,char>::decode(cursor, decoder, ec);
+        if (ec)
+        {
+            JSONCONS_THROW(ser_error(ec, cursor.context().line(), cursor.context().column()));
+        }
+        return val;
+    }
+
+    // With leading allocator parameter
+
+    template<class T, class Source, class TempAllocator>
+    typename std::enable_if<type_traits::is_basic_json<T>::value &&
+                            type_traits::is_byte_sequence<Source>::value,T>::type 
+    decode_ubjson(temp_allocator_arg_t, const TempAllocator& temp_alloc,
+                  const Source& v, 
+                  const ubjson_decode_options& options = ubjson_decode_options())
+    {
+        json_decoder<T,TempAllocator> decoder(temp_alloc);
+        auto adaptor = make_json_visitor_adaptor<json_visitor>(decoder);
+        basic_ubjson_reader<jsoncons::bytes_source,TempAllocator> reader(v, adaptor, options, temp_alloc);
+        reader.read();
+        if (!decoder.is_valid())
+        {
+            JSONCONS_THROW(ser_error(conv_errc::conversion_failed, reader.line(), reader.column()));
+        }
+        return decoder.get_result();
+    }
+
+    template<class T, class Source, class TempAllocator>
+    typename std::enable_if<!type_traits::is_basic_json<T>::value &&
+                            type_traits::is_byte_sequence<Source>::value,T>::type 
+    decode_ubjson(temp_allocator_arg_t, const TempAllocator& temp_alloc,
+                  const Source& v, 
+                  const ubjson_decode_options& options = ubjson_decode_options())
+    {
+        basic_ubjson_cursor<bytes_source,TempAllocator> cursor(v, options, temp_alloc);
+        json_decoder<basic_json<char,sorted_policy,TempAllocator>,TempAllocator> decoder(temp_alloc, temp_alloc);
+
+        std::error_code ec;
+        T val = decode_traits<T,char>::decode(cursor, decoder, ec);
+        if (ec)
+        {
+            JSONCONS_THROW(ser_error(ec, cursor.context().line(), cursor.context().column()));
+        }
+        return val;
+    }
+
+    template<class T,class TempAllocator>
+    typename std::enable_if<type_traits::is_basic_json<T>::value,T>::type 
+    decode_ubjson(temp_allocator_arg_t, const TempAllocator& temp_alloc,
+                  std::istream& is, 
+                  const ubjson_decode_options& options = ubjson_decode_options())
+    {
+        json_decoder<T,TempAllocator> decoder(temp_alloc);
+        auto adaptor = make_json_visitor_adaptor<json_visitor>(decoder);
+        basic_ubjson_reader<jsoncons::binary_stream_source,TempAllocator> reader(is, adaptor, options, temp_alloc);
+        reader.read();
+        if (!decoder.is_valid())
+        {
+            JSONCONS_THROW(ser_error(conv_errc::conversion_failed, reader.line(), reader.column()));
+        }
+        return decoder.get_result();
+    }
+
+    template<class T,class TempAllocator>
+    typename std::enable_if<!type_traits::is_basic_json<T>::value,T>::type 
+    decode_ubjson(temp_allocator_arg_t, const TempAllocator& temp_alloc,
+                  std::istream& is, 
+                  const ubjson_decode_options& options = ubjson_decode_options())
+    {
+        basic_ubjson_cursor<binary_stream_source,TempAllocator> cursor(is, options, temp_alloc);
+        json_decoder<basic_json<char,sorted_policy,TempAllocator>,TempAllocator> decoder(temp_alloc, temp_alloc);
+
+        std::error_code ec;
+        T val = decode_traits<T,char>::decode(cursor, decoder, ec);
+        if (ec)
+        {
+            JSONCONS_THROW(ser_error(ec, cursor.context().line(), cursor.context().column()));
+        }
+        return val;
+    }
+
+} // ubjson
+} // jsoncons
+
+#endif
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