initial

1 files changed, 954 insertions, 0 deletions

diff --git a/include/jsoncons_ext/csv/csv_encoder.hpp b/include/jsoncons_ext/csv/csv_encoder.hpp
new file mode 100644
index 0000000..49c1a3d
--- /dev/null
+++ b/include/jsoncons_ext/csv/csv_encoder.hpp
@@ -0,0 +1,954 @@
+// 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_CSV_CSV_ENCODER_HPP
+#define JSONCONS_CSV_CSV_ENCODER_HPP
+
+#include <array> // std::array
+#include <string>
+#include <vector>
+#include <ostream>
+#include <utility> // std::move
+#include <unordered_map> // std::unordered_map
+#include <memory> // std::allocator
+#include <limits> // std::numeric_limits
+#include <jsoncons/json_exception.hpp>
+#include <jsoncons/json_visitor.hpp>
+#include <jsoncons/detail/write_number.hpp>
+#include <jsoncons_ext/csv/csv_options.hpp>
+#include <jsoncons/sink.hpp>
+
+namespace jsoncons { namespace csv {
+
+template<class CharT,class Sink=jsoncons::stream_sink<CharT>,class Allocator=std::allocator<char>>
+class basic_csv_encoder final : public basic_json_visitor<CharT>
+{
+public:
+    using char_type = CharT;
+    using typename basic_json_visitor<CharT>::string_view_type;
+    using sink_type = Sink;
+
+    using allocator_type = Allocator;
+    using char_allocator_type = typename std::allocator_traits<allocator_type>:: template rebind_alloc<CharT>;
+    using string_type = std::basic_string<CharT, std::char_traits<CharT>, char_allocator_type>;
+    using string_allocator_type = typename std::allocator_traits<allocator_type>:: template rebind_alloc<string_type>;
+    using string_string_allocator_type = typename std::allocator_traits<allocator_type>:: template rebind_alloc<std::pair<const string_type,string_type>>;
+
+private:
+    static jsoncons::basic_string_view<CharT> null_constant()
+    {
+        static jsoncons::basic_string_view<CharT> k = JSONCONS_STRING_VIEW_CONSTANT(CharT,"null");
+        return k;
+    }
+    static jsoncons::basic_string_view<CharT> true_constant()
+    {
+        static jsoncons::basic_string_view<CharT> k = JSONCONS_STRING_VIEW_CONSTANT(CharT,"true");
+        return k;
+    }
+    static jsoncons::basic_string_view<CharT> false_constant()
+    {
+        static jsoncons::basic_string_view<CharT> k = JSONCONS_STRING_VIEW_CONSTANT(CharT,"false");
+        return k;
+    }
+
+    enum class stack_item_kind
+    {
+        row_mapping,
+        column_mapping,
+        object,
+        row,
+        column,
+        object_multi_valued_field,
+        row_multi_valued_field,
+        column_multi_valued_field
+    };
+
+    struct stack_item
+    {
+        stack_item_kind item_kind_;
+        std::size_t count_;
+
+        stack_item(stack_item_kind item_kind) noexcept
+           : item_kind_(item_kind), count_(0)
+        {
+        }
+
+        bool is_object() const
+        {
+            return item_kind_ == stack_item_kind::object;
+        }
+
+        stack_item_kind item_kind() const
+        {
+            return item_kind_;
+        }
+    };
+
+    Sink sink_;
+    const basic_csv_encode_options<CharT> options_;
+    allocator_type alloc_;
+
+    std::vector<stack_item> stack_;
+    jsoncons::detail::write_double fp_;
+    std::vector<string_type,string_allocator_type> strings_buffer_;
+
+    std::unordered_map<string_type,string_type, std::hash<string_type>,std::equal_to<string_type>,string_string_allocator_type> buffered_line_;
+    string_type name_;
+    std::size_t column_index_;
+    std::vector<std::size_t> row_counts_;
+
+    // Noncopyable and nonmoveable
+    basic_csv_encoder(const basic_csv_encoder&) = delete;
+    basic_csv_encoder& operator=(const basic_csv_encoder&) = delete;
+public:
+    basic_csv_encoder(Sink&& sink, 
+                      const Allocator& alloc = Allocator())
+       : basic_csv_encoder(std::forward<Sink>(sink), basic_csv_encode_options<CharT>(), alloc)
+    {
+    }
+
+    basic_csv_encoder(Sink&& sink,
+                      const basic_csv_encode_options<CharT>& options, 
+                      const Allocator& alloc = Allocator())
+      : sink_(std::forward<Sink>(sink)),
+        options_(options),
+        alloc_(alloc),
+        stack_(),
+        fp_(options.float_format(), options.precision()),
+        column_index_(0)
+    {
+        jsoncons::csv::detail::parse_column_names(options.column_names(), strings_buffer_);
+    }
+
+    ~basic_csv_encoder() noexcept
+    {
+        JSONCONS_TRY
+        {
+            sink_.flush();
+        }
+        JSONCONS_CATCH(...)
+        {
+        }
+    }
+
+    void reset()
+    {
+        stack_.clear();
+        strings_buffer_.clear();
+        buffered_line_.clear();
+        name_.clear();
+        column_index_ = 0;
+        row_counts_.clear();
+    }
+
+    void reset(Sink&& sink)
+    {
+        sink_ = std::move(sink);
+        reset();
+    }
+
+private:
+
+    template<class AnyWriter>
+    void escape_string(const CharT* s,
+                       std::size_t length,
+                       CharT quote_char, CharT quote_escape_char,
+                       AnyWriter& sink)
+    {
+        const CharT* begin = s;
+        const CharT* end = s + length;
+        for (const CharT* it = begin; it != end; ++it)
+        {
+            CharT c = *it;
+            if (c == quote_char)
+            {
+                sink.push_back(quote_escape_char); 
+                sink.push_back(quote_char);
+            }
+            else
+            {
+                sink.push_back(c);
+            }
+        }
+    }
+
+    void visit_flush() override
+    {
+        sink_.flush();
+    }
+
+    bool visit_begin_object(semantic_tag, const ser_context&, std::error_code& ec) override
+    {
+        if (stack_.empty())
+        {
+            stack_.emplace_back(stack_item_kind::column_mapping);
+            return true;
+        }
+        switch (stack_.back().item_kind_)
+        {
+            case stack_item_kind::row_mapping:
+                stack_.emplace_back(stack_item_kind::object);
+                return true;
+            default: // error
+                ec = csv_errc::source_error;
+                return false;
+        }
+    }
+
+    bool visit_end_object(const ser_context&, std::error_code&) override
+    {
+        JSONCONS_ASSERT(!stack_.empty());
+
+        switch (stack_.back().item_kind_)
+        {
+            case stack_item_kind::object:
+                if (stack_[0].count_ == 0)
+                {
+                    for (std::size_t i = 0; i < strings_buffer_.size(); ++i)
+                    {
+                        if (i > 0)
+                        {
+                            sink_.push_back(options_.field_delimiter());
+                        }
+                        sink_.append(strings_buffer_[i].data(),
+                                      strings_buffer_[i].length());
+                    }
+                    sink_.append(options_.line_delimiter().data(),
+                                  options_.line_delimiter().length());
+                }
+                for (std::size_t i = 0; i < strings_buffer_.size(); ++i)
+                {
+                    if (i > 0)
+                    {
+                        sink_.push_back(options_.field_delimiter());
+                    }
+                    auto it = buffered_line_.find(strings_buffer_[i]);
+                    if (it != buffered_line_.end())
+                    {
+                        sink_.append(it->second.data(),it->second.length());
+                        it->second.clear();
+                    }
+                }
+                sink_.append(options_.line_delimiter().data(), options_.line_delimiter().length());
+                break;
+            case stack_item_kind::column_mapping:
+             {
+                 for (const auto& item : strings_buffer_)
+                 {
+                     sink_.append(item.data(), item.size());
+                     sink_.append(options_.line_delimiter().data(), options_.line_delimiter().length());
+                 }
+                 break;
+             }
+            default:
+                break;
+        }
+        stack_.pop_back();
+        if (!stack_.empty())
+        {
+            end_value();
+        }
+        return true;
+    }
+
+    bool visit_begin_array(semantic_tag, const ser_context&, std::error_code& ec) override
+    {
+        if (stack_.empty())
+        {
+            stack_.emplace_back(stack_item_kind::row_mapping);
+            return true;
+        }
+        switch (stack_.back().item_kind_)
+        {
+            case stack_item_kind::row_mapping:
+                stack_.emplace_back(stack_item_kind::row);
+                if (stack_[0].count_ == 0)
+                {
+                    for (std::size_t i = 0; i < strings_buffer_.size(); ++i)
+                    {
+                        if (i > 0)
+                        {
+                            sink_.push_back(options_.field_delimiter());
+                        }
+                        sink_.append(strings_buffer_[i].data(),strings_buffer_[i].length());
+                    }
+                    if (strings_buffer_.size() > 0)
+                    {
+                        sink_.append(options_.line_delimiter().data(),
+                                      options_.line_delimiter().length());
+                    }
+                }
+                return true;
+            case stack_item_kind::object:
+                stack_.emplace_back(stack_item_kind::object_multi_valued_field);
+                return true;
+            case stack_item_kind::column_mapping:
+                stack_.emplace_back(stack_item_kind::column);
+                row_counts_.push_back(1);
+                if (strings_buffer_.size() <= row_counts_.back())
+                {
+                    strings_buffer_.emplace_back();
+                }
+                return true;
+            case stack_item_kind::column:
+            {
+                if (strings_buffer_.size() <= row_counts_.back())
+                {
+                    strings_buffer_.emplace_back();
+                }                
+                jsoncons::string_sink<std::basic_string<CharT>> bo(strings_buffer_[row_counts_.back()]);
+                begin_value(bo);
+                stack_.emplace_back(stack_item_kind::column_multi_valued_field);
+                return true;
+            }
+            case stack_item_kind::row:
+                begin_value(sink_);
+                stack_.emplace_back(stack_item_kind::row_multi_valued_field);
+                return true;
+            default: // error
+                ec = csv_errc::source_error;
+                return false;
+        }
+    }
+
+    bool visit_end_array(const ser_context&, std::error_code&) override
+    {
+        JSONCONS_ASSERT(!stack_.empty());
+        switch (stack_.back().item_kind_)
+        {
+            case stack_item_kind::row:
+                sink_.append(options_.line_delimiter().data(),
+                              options_.line_delimiter().length());
+                break;
+            case stack_item_kind::column:
+                ++column_index_;
+                break;
+            default:
+                break;
+        }
+        stack_.pop_back();
+
+        if (!stack_.empty())
+        {
+            end_value();
+        }
+        return true;
+    }
+
+    bool visit_key(const string_view_type& name, const ser_context&, std::error_code&) override
+    {
+        JSONCONS_ASSERT(!stack_.empty());
+        switch (stack_.back().item_kind_)
+        {
+            case stack_item_kind::object:
+            {
+                name_ = string_type(name);
+                buffered_line_[string_type(name)] = std::basic_string<CharT>();
+                if (stack_[0].count_ == 0 && options_.column_names().size() == 0)
+                {
+                    strings_buffer_.emplace_back(name);
+                }
+                break;
+            }
+            case stack_item_kind::column_mapping:
+            {
+                if (strings_buffer_.empty())
+                {
+                    strings_buffer_.emplace_back(name);
+                }
+                else
+                {
+                    strings_buffer_[0].push_back(options_.field_delimiter());
+                    strings_buffer_[0].append(string_type(name));
+                }
+                break;
+            }
+            default:
+                break;
+        }
+        return true;
+    }
+
+    bool visit_null(semantic_tag, const ser_context&, std::error_code&) override
+    {
+        JSONCONS_ASSERT(!stack_.empty());
+        switch (stack_.back().item_kind_)
+        {
+            case stack_item_kind::object:
+            case stack_item_kind::object_multi_valued_field:
+            {
+                auto it = buffered_line_.find(name_);
+                if (it != buffered_line_.end())
+                {
+                    std::basic_string<CharT> s;
+                    jsoncons::string_sink<std::basic_string<CharT>> bo(s);
+                    write_null_value(bo);
+                    bo.flush();
+                    if (!it->second.empty() && options_.subfield_delimiter() != char_type())
+                    {
+                        it->second.push_back(options_.subfield_delimiter());
+                    }
+                    it->second.append(s);
+                }
+                break;
+            }
+            case stack_item_kind::row:
+            case stack_item_kind::row_multi_valued_field:
+                write_null_value(sink_);
+                break;
+            case stack_item_kind::column:
+            {
+                if (strings_buffer_.size() <= row_counts_.back())
+                {
+                    strings_buffer_.emplace_back();
+                }
+                jsoncons::string_sink<std::basic_string<CharT>> bo(strings_buffer_[row_counts_.back()]);
+                write_null_value(bo);
+                break;
+            }
+            case stack_item_kind::column_multi_valued_field:
+            {
+                jsoncons::string_sink<std::basic_string<CharT>> bo(strings_buffer_[row_counts_.back()]);
+                write_null_value(bo);
+                break;
+            }
+            default:
+                break;
+        }
+        return true;
+    }
+
+    bool visit_string(const string_view_type& sv, semantic_tag, const ser_context&, std::error_code&) override
+    {
+        JSONCONS_ASSERT(!stack_.empty());
+        switch (stack_.back().item_kind_)
+        {
+            case stack_item_kind::object:
+            case stack_item_kind::object_multi_valued_field:
+            {
+                auto it = buffered_line_.find(name_);
+                if (it != buffered_line_.end())
+                {
+                    std::basic_string<CharT> s;
+                    jsoncons::string_sink<std::basic_string<CharT>> bo(s);
+                    write_string_value(sv,bo);
+                    bo.flush();
+                    if (!it->second.empty() && options_.subfield_delimiter() != char_type())
+                    {
+                        it->second.push_back(options_.subfield_delimiter());
+                    }
+                    it->second.append(s);
+                }
+                break;
+            }
+            case stack_item_kind::row:
+            case stack_item_kind::row_multi_valued_field:
+                write_string_value(sv,sink_);
+                break;
+            case stack_item_kind::column:
+            {
+                if (strings_buffer_.size() <= row_counts_.back())
+                {
+                    strings_buffer_.emplace_back();
+                }
+                jsoncons::string_sink<std::basic_string<CharT>> bo(strings_buffer_[row_counts_.back()]);
+                write_string_value(sv,bo);
+                break;
+            }
+            case stack_item_kind::column_multi_valued_field:
+            {
+                jsoncons::string_sink<std::basic_string<CharT>> bo(strings_buffer_[row_counts_.back()]);
+                write_string_value(sv,bo);
+                break;
+            }
+            default:
+                break;
+        }
+        return true;
+    }
+
+    bool visit_byte_string(const byte_string_view& b, 
+                              semantic_tag tag, 
+                              const ser_context& context,
+                              std::error_code& ec) override
+    {
+        byte_string_chars_format encoding_hint;
+        switch (tag)
+        {
+            case semantic_tag::base16:
+                encoding_hint = byte_string_chars_format::base16;
+                break;
+            case semantic_tag::base64:
+                encoding_hint = byte_string_chars_format::base64;
+                break;
+            case semantic_tag::base64url:
+                encoding_hint = byte_string_chars_format::base64url;
+                break;
+            default:
+                encoding_hint = byte_string_chars_format::none;
+                break;
+        }
+        byte_string_chars_format format = jsoncons::detail::resolve_byte_string_chars_format(encoding_hint,byte_string_chars_format::none,byte_string_chars_format::base64url);
+
+        std::basic_string<CharT> s;
+        switch (format)
+        {
+            case byte_string_chars_format::base16:
+            {
+                encode_base16(b.begin(),b.end(),s);
+                visit_string(s, semantic_tag::none, context, ec);
+                break;
+            }
+            case byte_string_chars_format::base64:
+            {
+                encode_base64(b.begin(),b.end(),s);
+                visit_string(s, semantic_tag::none, context, ec);
+                break;
+            }
+            case byte_string_chars_format::base64url:
+            {
+                encode_base64url(b.begin(),b.end(),s);
+                visit_string(s, semantic_tag::none, context, ec);
+                break;
+            }
+            default:
+            {
+                JSONCONS_UNREACHABLE();
+            }
+        }
+
+        return true;
+    }
+
+    bool visit_double(double val, 
+                         semantic_tag, 
+                         const ser_context& context,
+                         std::error_code& ec) override
+    {
+        JSONCONS_ASSERT(!stack_.empty());
+        switch (stack_.back().item_kind_)
+        {
+            case stack_item_kind::object:
+            case stack_item_kind::object_multi_valued_field:
+            {
+                auto it = buffered_line_.find(name_);
+                if (it != buffered_line_.end())
+                {
+                    std::basic_string<CharT> s;
+                    jsoncons::string_sink<std::basic_string<CharT>> bo(s);
+                    write_double_value(val, context, bo, ec);
+                    bo.flush();
+                    if (!it->second.empty() && options_.subfield_delimiter() != char_type())
+                    {
+                        it->second.push_back(options_.subfield_delimiter());
+                    }
+                    it->second.append(s);
+                }
+                break;
+            }
+            case stack_item_kind::row:
+            case stack_item_kind::row_multi_valued_field:
+                write_double_value(val, context, sink_, ec);
+                break;
+            case stack_item_kind::column:
+            {
+                if (strings_buffer_.size() <= row_counts_.back())
+                {
+                    strings_buffer_.emplace_back();
+                }
+                jsoncons::string_sink<std::basic_string<CharT>> bo(strings_buffer_[row_counts_.back()]);
+                write_double_value(val, context, bo, ec);
+                break;
+            }
+            case stack_item_kind::column_multi_valued_field:
+            {
+                jsoncons::string_sink<std::basic_string<CharT>> bo(strings_buffer_[row_counts_.back()]);
+                write_double_value(val, context, bo, ec);
+                break;
+            }
+            default:
+                break;
+        }
+        return true;
+    }
+
+    bool visit_int64(int64_t val, 
+                        semantic_tag, 
+                        const ser_context&,
+                        std::error_code&) override
+    {
+        JSONCONS_ASSERT(!stack_.empty());
+        switch (stack_.back().item_kind_)
+        {
+            case stack_item_kind::object:
+            case stack_item_kind::object_multi_valued_field:
+            {
+                auto it = buffered_line_.find(name_);
+                if (it != buffered_line_.end())
+                {
+                    std::basic_string<CharT> s;
+                    jsoncons::string_sink<std::basic_string<CharT>> bo(s);
+                    write_int64_value(val,bo);
+                    bo.flush();
+                    if (!it->second.empty() && options_.subfield_delimiter() != char_type())
+                    {
+                        it->second.push_back(options_.subfield_delimiter());
+                    }
+                    it->second.append(s);
+                }
+                break;
+            }
+            case stack_item_kind::row:
+            case stack_item_kind::row_multi_valued_field:
+                write_int64_value(val,sink_);
+                break;
+            case stack_item_kind::column:
+            {
+                if (strings_buffer_.size() <= row_counts_.back())
+                {
+                    strings_buffer_.emplace_back();
+                }
+                jsoncons::string_sink<std::basic_string<CharT>> bo(strings_buffer_[row_counts_.back()]);
+                write_int64_value(val, bo);
+                break;
+            }
+            case stack_item_kind::column_multi_valued_field:
+            {
+                jsoncons::string_sink<std::basic_string<CharT>> bo(strings_buffer_[row_counts_.back()]);
+                write_int64_value(val, bo);
+                break;
+            }
+            default:
+                break;
+        }
+        return true;
+    }
+
+    bool visit_uint64(uint64_t val, 
+                      semantic_tag, 
+                      const ser_context&,
+                      std::error_code&) override
+    {
+        JSONCONS_ASSERT(!stack_.empty());
+        switch (stack_.back().item_kind_)
+        {
+            case stack_item_kind::object:
+            case stack_item_kind::object_multi_valued_field:
+            {
+                auto it = buffered_line_.find(name_);
+                if (it != buffered_line_.end())
+                {
+                    std::basic_string<CharT> s;
+                    jsoncons::string_sink<std::basic_string<CharT>> bo(s);
+                    write_uint64_value(val, bo);
+                    bo.flush();
+                    if (!it->second.empty() && options_.subfield_delimiter() != char_type())
+                    {
+                        it->second.push_back(options_.subfield_delimiter());
+                    }
+                    it->second.append(s);
+                }
+                break;
+            }
+            case stack_item_kind::row:
+            case stack_item_kind::row_multi_valued_field:
+                write_uint64_value(val,sink_);
+                break;
+            case stack_item_kind::column:
+            {
+                if (strings_buffer_.size() <= row_counts_.back())
+                {
+                    strings_buffer_.emplace_back();
+                }
+                jsoncons::string_sink<std::basic_string<CharT>> bo(strings_buffer_[row_counts_.back()]);
+                write_uint64_value(val, bo);
+                break;
+            }
+            case stack_item_kind::column_multi_valued_field:
+            {
+                jsoncons::string_sink<std::basic_string<CharT>> bo(strings_buffer_[row_counts_.back()]);
+                write_uint64_value(val, bo);
+                break;
+            }
+            default:
+                break;
+        }
+        return true;
+    }
+
+    bool visit_bool(bool val, semantic_tag, const ser_context&, std::error_code&) override
+    {
+        JSONCONS_ASSERT(!stack_.empty());
+        switch (stack_.back().item_kind_)
+        {
+            case stack_item_kind::object:
+            case stack_item_kind::object_multi_valued_field:
+            {
+                auto it = buffered_line_.find(name_);
+                if (it != buffered_line_.end())
+                {
+                    std::basic_string<CharT> s;
+                    jsoncons::string_sink<std::basic_string<CharT>> bo(s);
+                    write_bool_value(val,bo);
+                    bo.flush();
+                    if (!it->second.empty() && options_.subfield_delimiter() != char_type())
+                    {
+                        it->second.push_back(options_.subfield_delimiter());
+                    }
+                    it->second.append(s);
+                }
+                break;
+            }
+            case stack_item_kind::row:
+            case stack_item_kind::row_multi_valued_field:
+                write_bool_value(val,sink_);
+                break;
+            case stack_item_kind::column:
+            {
+                if (strings_buffer_.size() <= row_counts_.back())
+                {
+                    strings_buffer_.emplace_back();
+                }
+                jsoncons::string_sink<std::basic_string<CharT>> bo(strings_buffer_[row_counts_.back()]);
+                write_bool_value(val, bo);
+                break;
+            }
+            case stack_item_kind::column_multi_valued_field:
+            {
+                jsoncons::string_sink<std::basic_string<CharT>> bo(strings_buffer_[row_counts_.back()]);
+                write_bool_value(val, bo);
+                break;
+            }
+            default:
+                break;
+        }
+        return true;
+    }
+
+    template <class AnyWriter>
+    bool do_string_value(const CharT* s, std::size_t length, AnyWriter& sink)
+    {
+        bool quote = false;
+        if (options_.quote_style() == quote_style_kind::all || options_.quote_style() == quote_style_kind::nonnumeric ||
+            (options_.quote_style() == quote_style_kind::minimal &&
+            (std::char_traits<CharT>::find(s, length, options_.field_delimiter()) != nullptr || std::char_traits<CharT>::find(s, length, options_.quote_char()) != nullptr)))
+        {
+            quote = true;
+            sink.push_back(options_.quote_char());
+        }
+        escape_string(s, length, options_.quote_char(), options_.quote_escape_char(), sink);
+        if (quote)
+        {
+            sink.push_back(options_.quote_char());
+        }
+
+        return true;
+    }
+
+    template <class AnyWriter>
+    void write_string_value(const string_view_type& value, AnyWriter& sink)
+    {
+        begin_value(sink);
+        do_string_value(value.data(),value.length(),sink);
+        end_value();
+    }
+
+    template <class AnyWriter>
+    void write_double_value(double val, const ser_context& context, AnyWriter& sink, std::error_code& ec)
+    {
+        begin_value(sink);
+
+        if (!std::isfinite(val))
+        {
+            if ((std::isnan)(val))
+            {
+                if (options_.enable_nan_to_num())
+                {
+                    sink.append(options_.nan_to_num().data(), options_.nan_to_num().length());
+                }
+                else if (options_.enable_nan_to_str())
+                {
+                    visit_string(options_.nan_to_str(), semantic_tag::none, context, ec);
+                }
+                else
+                {
+                    sink.append(null_constant().data(), null_constant().size());
+                }
+            }
+            else if (val == std::numeric_limits<double>::infinity())
+            {
+                if (options_.enable_inf_to_num())
+                {
+                    sink.append(options_.inf_to_num().data(), options_.inf_to_num().length());
+                }
+                else if (options_.enable_inf_to_str())
+                {
+                    visit_string(options_.inf_to_str(), semantic_tag::none, context, ec);
+                }
+                else
+                {
+                    sink.append(null_constant().data(), null_constant().size());
+                }
+            }
+            else
+            {
+                if (options_.enable_neginf_to_num())
+                {
+                    sink.append(options_.neginf_to_num().data(), options_.neginf_to_num().length());
+                }
+                else if (options_.enable_neginf_to_str())
+                {
+                    visit_string(options_.neginf_to_str(), semantic_tag::none, context, ec);
+                }
+                else
+                {
+                    sink.append(null_constant().data(), null_constant().size());
+                }
+            }
+        }
+        else
+        {
+            fp_(val, sink);
+        }
+
+        end_value();
+
+    }
+
+    template <class AnyWriter>
+    void write_int64_value(int64_t val, AnyWriter& sink)
+    {
+        begin_value(sink);
+
+        jsoncons::detail::from_integer(val,sink);
+
+        end_value();
+    }
+
+    template <class AnyWriter>
+    void write_uint64_value(uint64_t val, AnyWriter& sink)
+    {
+        begin_value(sink);
+
+        jsoncons::detail::from_integer(val,sink);
+
+        end_value();
+    }
+
+    template <class AnyWriter>
+    void write_bool_value(bool val, AnyWriter& sink) 
+    {
+        begin_value(sink);
+
+        if (val)
+        {
+            sink.append(true_constant().data(), true_constant().size());
+        }
+        else
+        {
+            sink.append(false_constant().data(), false_constant().size());
+        }
+
+        end_value();
+    }
+ 
+    template <class AnyWriter>
+    bool write_null_value(AnyWriter& sink) 
+    {
+        begin_value(sink);
+        sink.append(null_constant().data(), null_constant().size());
+        end_value();
+        return true;
+    }
+
+    template <class AnyWriter>
+    void begin_value(AnyWriter& sink)
+    {
+        JSONCONS_ASSERT(!stack_.empty());
+        switch (stack_.back().item_kind_)
+        {
+            case stack_item_kind::row:
+                if (stack_.back().count_ > 0)
+                {
+                    sink.push_back(options_.field_delimiter());
+                }
+                break;
+            case stack_item_kind::column:
+            {
+                if (row_counts_.size() >= 3)
+                {
+                    for (std::size_t i = row_counts_.size()-2; i-- > 0;)
+                    {
+                        if (row_counts_[i] <= row_counts_.back())
+                        {
+                            sink.push_back(options_.field_delimiter());
+                        }
+                        else
+                        {
+                            break;
+                        }
+                    }
+                }
+                if (column_index_ > 0)
+                {
+                    sink.push_back(options_.field_delimiter());
+                }
+                break;
+            }
+            case stack_item_kind::row_multi_valued_field:
+            case stack_item_kind::column_multi_valued_field:
+                if (stack_.back().count_ > 0 && options_.subfield_delimiter() != char_type())
+                {
+                    sink.push_back(options_.subfield_delimiter());
+                }
+                break;
+            default:
+                break;
+        }
+    }
+
+    void end_value()
+    {
+        JSONCONS_ASSERT(!stack_.empty());
+        switch(stack_.back().item_kind_)
+        {
+            case stack_item_kind::row:
+            {
+                ++stack_.back().count_;
+                break;
+            }
+            case stack_item_kind::column:
+            {
+                ++row_counts_.back();
+                break;
+            }
+            default:
+                ++stack_.back().count_;
+                break;
+        }
+    }
+};
+
+using csv_stream_encoder = basic_csv_encoder<char>;
+using csv_string_encoder = basic_csv_encoder<char,jsoncons::string_sink<std::string>>;
+using csv_wstream_encoder = basic_csv_encoder<wchar_t>;
+using wcsv_string_encoder = basic_csv_encoder<wchar_t,jsoncons::string_sink<std::wstring>>;
+
+#if !defined(JSONCONS_NO_DEPRECATED)
+template<class CharT, class Sink = jsoncons::stream_sink<CharT>, class Allocator = std::allocator<CharT>>
+using basic_csv_serializer = basic_csv_encoder<CharT,Sink,Allocator>;
+
+JSONCONS_DEPRECATED_MSG("Instead, use csv_stream_encoder") typedef csv_stream_encoder csv_serializer;
+JSONCONS_DEPRECATED_MSG("Instead, use csv_string_encoder") typedef csv_string_encoder csv_string_serializer;
+JSONCONS_DEPRECATED_MSG("Instead, use csv_stream_encoder") typedef csv_stream_encoder csv_serializer;
+JSONCONS_DEPRECATED_MSG("Instead, use csv_string_encoder") typedef csv_string_encoder csv_string_serializer;
+JSONCONS_DEPRECATED_MSG("Instead, use csv_stream_encoder") typedef csv_stream_encoder csv_encoder;
+JSONCONS_DEPRECATED_MSG("Instead, use wcsv_stream_encoder") typedef csv_stream_encoder wcsv_encoder;
+#endif
+
+}}
+
+#endif