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/* -*- 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 <tools/toolsdllapi.h>
#include <rtl/ustring.hxx>
#include <algorithm>
namespace rtl
{
class OStringBuffer;
}
/** 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 ScopedJsonWriterNode;
class ScopedJsonWriterArray;
class ScopedJsonWriterStruct;
class TOOLS_DLLPUBLIC JsonWriter
{
friend class ScopedJsonWriterNode;
friend class ScopedJsonWriterArray;
friend class ScopedJsonWriterStruct;
int mSpaceAllocated;
char* mpBuffer;
int mStartNodeCount;
char* mPos;
bool mbFirstFieldInNode;
public:
JsonWriter();
~JsonWriter();
[[nodiscard]] ScopedJsonWriterNode startNode(const char*);
[[nodiscard]] ScopedJsonWriterArray startArray(const char*);
[[nodiscard]] ScopedJsonWriterStruct startStruct();
void put(const char* pPropName, const OUString& rPropValue);
void put(const char* pPropName, const OString& rPropValue);
void put(const char* pPropName, const char* pPropVal);
void put(const char* pPropName, const std::string& rPropValue)
{
put(pPropName, rPropValue.data());
}
void put(const char* pPropName, sal_uInt16 nPropVal) { put(pPropName, sal_Int64(nPropVal)); }
void put(const char* pPropName, sal_Int16 nPropVal) { put(pPropName, sal_Int64(nPropVal)); }
void put(const char* pPropName, sal_Int32 nPropVal) { put(pPropName, sal_Int64(nPropVal)); }
void put(const char* pPropName, sal_uInt32 nPropVal) { put(pPropName, sal_Int64(nPropVal)); }
void put(const char* pPropName, sal_Int64);
void put(const char* pPropName, bool);
void put(const char* pPropName, double);
/// This assumes that this data belongs at this point in the stream, and is valid, and properly encoded
void putRaw(const rtl::OStringBuffer&);
/** Hands ownership of the underlying storage buffer to the caller,
* after this no more document modifications may be written. */
char* extractData();
OString extractAsOString();
std::string extractAsStdString();
/** returns true if the current JSON data matches the string */
bool isDataEquals(const std::string&);
private:
void endNode();
void endArray();
void endStruct();
void addCommaBeforeField();
void reallocBuffer(int noMoreBytesRequired);
// this part inline to speed up the fast path
inline void ensureSpace(int noMoreBytesRequired)
{
assert(mpBuffer && "already extracted data");
int currentUsed = mPos - mpBuffer;
if (currentUsed + noMoreBytesRequired >= mSpaceAllocated)
reallocBuffer(noMoreBytesRequired);
}
};
/**
* Auto-closes the node.
*/
class ScopedJsonWriterNode
{
friend class JsonWriter;
JsonWriter& mrWriter;
ScopedJsonWriterNode(JsonWriter& rWriter)
: mrWriter(rWriter)
{
}
public:
~ScopedJsonWriterNode() { mrWriter.endNode(); }
};
/**
* Auto-closes the node.
*/
class ScopedJsonWriterArray
{
friend class JsonWriter;
JsonWriter& mrWriter;
ScopedJsonWriterArray(JsonWriter& rWriter)
: mrWriter(rWriter)
{
}
public:
~ScopedJsonWriterArray() { mrWriter.endArray(); }
};
/**
* Auto-closes the node.
*/
class ScopedJsonWriterStruct
{
friend class JsonWriter;
JsonWriter& mrWriter;
ScopedJsonWriterStruct(JsonWriter& rWriter)
: mrWriter(rWriter)
{
}
public:
~ScopedJsonWriterStruct() { mrWriter.endStruct(); }
};
};
/* vim:set shiftwidth=4 softtabstop=4 expandtab cinoptions=b1,g0,N-s cinkeys+=0=break: */
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