/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4; fill-column: 100 -*- */

/*

 * This file is part of the LibreOffice project.

 *

 * This Source Code Form is subject to the terms of the Mozilla Public

 * License, v. 2.0. If a copy of the MPL was not distributed with this

 * file, You can obtain one at http://mozilla.org/MPL/2.0/.

 */

#pragma once

#include <sal/config.h>

#include <tools/toolsdllapi.h>

#include <rtl/string.hxx>

#include <rtl/ustring.hxx>

#include <string_view>

/** Simple JSON encoder designed specifically for LibreOfficeKit purposes.

 *

 * (1) Minimal allocations/re-allocations/copying

 * (2) Small/simple JSON documents

 * (3) ascii property names

 */

namespace tools

{

class TOOLS_DLLPUBLIC JsonWriter

{

    // Auto-closes the node.

    template <char closing> struct ScopedJsonWriterNode

    {

        JsonWriter& mrWriter;

        ~ScopedJsonWriterNode() { mrWriter.endNode(closing); }

Unexecuted instantiation: tools::JsonWriter::ScopedJsonWriterNode<(char)125>::~ScopedJsonWriterNode()

Unexecuted instantiation: tools::JsonWriter::ScopedJsonWriterNode<(char)93>::~ScopedJsonWriterNode()

    };

    rtl_String* mpBuffer;

    char* mPos;

    int mSpaceAllocated;

    int mStartNodeCount;

    bool mbFirstFieldInNode;

    bool mbClosed; // cannot add to it anymore

public:

    JsonWriter();

    ~JsonWriter();

    [[nodiscard]] ScopedJsonWriterNode<'}'> startNode(std::string_view nodeName);

    [[nodiscard]] ScopedJsonWriterNode<']'> startArray(std::string_view nodeName);

    [[nodiscard]] ScopedJsonWriterNode<']'> startAnonArray();

    [[nodiscard]] ScopedJsonWriterNode<'}'> startStruct();

    void put(std::u16string_view pPropName, std::u16string_view rPropValue);

    void put(std::string_view pPropName, const OUString& rPropValue);

    // Assumes utf-8 property value encoding

    void put(std::string_view pPropName, std::string_view rPropValue);

    void put(std::string_view pPropName, const char* pPropVal)

    {

        put(pPropName, std::string_view(pPropVal));

    }

    template <size_t N> void put(std::string_view pPropName, const char (&pPropVal)[N])

    {

        put(pPropName, std::string_view(pPropVal, N));

    }

    template <typename N, std::enable_if_t<std::is_arithmetic_v<N>, int> = 0>

    void put(std::string_view pPropName, N n)

    {

        putLiteral(pPropName, OString::number(n));

    }

Unexecuted instantiation: _ZN5tools10JsonWriter3putIlTnNSt3__19enable_ifIXsr3stdE15is_arithmetic_vIT_EEiE4typeELi0EEEvNS2_17basic_string_viewIcNS2_11char_traitsIcEEEES4_

Unexecuted instantiation: _ZN5tools10JsonWriter3putIjTnNSt3__19enable_ifIXsr3stdE15is_arithmetic_vIT_EEiE4typeELi0EEEvNS2_17basic_string_viewIcNS2_11char_traitsIcEEEES4_

Unexecuted instantiation: _ZN5tools10JsonWriter3putIiTnNSt3__19enable_ifIXsr3stdE15is_arithmetic_vIT_EEiE4typeELi0EEEvNS2_17basic_string_viewIcNS2_11char_traitsIcEEEES4_

Unexecuted instantiation: _ZN5tools10JsonWriter3putItTnNSt3__19enable_ifIXsr3stdE15is_arithmetic_vIT_EEiE4typeELi0EEEvNS2_17basic_string_viewIcNS2_11char_traitsIcEEEES4_

Unexecuted instantiation: _ZN5tools10JsonWriter3putIsTnNSt3__19enable_ifIXsr3stdE15is_arithmetic_vIT_EEiE4typeELi0EEEvNS2_17basic_string_viewIcNS2_11char_traitsIcEEEES4_

Unexecuted instantiation: _ZN5tools10JsonWriter3putIdTnNSt3__19enable_ifIXsr3stdE15is_arithmetic_vIT_EEiE4typeELi0EEEvNS2_17basic_string_viewIcNS2_11char_traitsIcEEEES4_

Unexecuted instantiation: _ZN5tools10JsonWriter3putImTnNSt3__19enable_ifIXsr3stdE15is_arithmetic_vIT_EEiE4typeELi0EEEvNS2_17basic_string_viewIcNS2_11char_traitsIcEEEES4_

Unexecuted instantiation: _ZN5tools10JsonWriter3putIfTnNSt3__19enable_ifIXsr3stdE15is_arithmetic_vIT_EEiE4typeELi0EEEvNS2_17basic_string_viewIcNS2_11char_traitsIcEEEES4_

    void put(std::string_view pPropName, bool);

    void putSimpleValue(std::u16string_view rPropValue);

    /// This assumes that this data belongs at this point in the stream, and is valid, and properly encoded

    void putRaw(std::string_view);

    /** Closes the tags, and returns data.

     * After this no more document modifications may be written. */

    OString finishAndGetAsOString();

private:

    void endNode(char closing);

    void addCommaBeforeField();

    void writeEscapedOUString(std::u16string_view rPropVal);

    void closeDocument();

    void ensureSpace(int noMoreBytesRequired);

    void ensureSpaceAndWriteNameColon(std::string_view name, int valSize);

    void putLiteral(std::string_view propName, std::string_view propValue);

    // overflow validation in debug mode

    static constexpr unsigned char JSON_WRITER_DEBUG_MARKER = 0xde;

    inline void addValidationMark()

    {

#ifndef NDEBUG

        *(mpBuffer->buffer + mSpaceAllocated - 1) = JSON_WRITER_DEBUG_MARKER;

#endif

    }

    inline void validate()

    {

#ifndef NDEBUG

        unsigned char c = *(mpBuffer->buffer + mSpaceAllocated - 1);

        assert(c == JSON_WRITER_DEBUG_MARKER);

#endif

    }

};

}

/* vim:set shiftwidth=4 softtabstop=4 expandtab cinoptions=b1,g0,N-s cinkeys+=0=break: */