rapidjson 사용하기

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rapidjson 사용하기

민자르 2017. 1. 20. 13:36

요즘 즐겨쓰는 json 라이브러리는 rapidjson 이다.

공식 사이트

http://rapidjson.org/

주로 사용하는 나의 코드

std::string json;

json 내용

{

    "hello": "world",

    "t": true ,

    "f": false,

    "n": null,

    "i": 123,

    "pi": 3.1416,

    "a": [1, 2, 3, 4]

}

rapidjson::Document doc;

doc.Parse(json.c_str());

if (doc.HasParseError())

return false;

doc["hello"].GetString();

doc["t"].GetBool();

doc["f"].GetBool();

doc["n"].IsNull();

doc["pi"].GetDouble();

const rapidjson::Value& valueInfo = doc["a"];

for (SizeType i = 0; i < valueInfo.Size(); i++)

{

valueInfo[i].GetInt();

}

대략 구성하고 보았더니

사용성이 쉽다.

그런데 공식 사이트가 너무 설명이 잘 되어 있다. 자세한 설명과 예제가 풍부해서 다른 것을 찾아 볼 필요가 없을 정도이다.

공식 사이트에서

배열을 반복문을 통해서 접근하는 방법이 몇가지 더 있어서 가져와서 적어 봤다.

for (Value::ConstValueIterator itr = a.Begin(); itr != a.End(); ++itr)

    printf("%d ", itr->GetInt());

C++11

for (auto& v : a.GetArray())

    printf("%d ", v.GetInt());

마지막으로 Change Log 가져왔다.

1.1.0 - 2016-08-25

Added

Add GenericDocument ctor overload to specify JSON type (#369)
Add FAQ (#372, #373, #374, #376)
Add forward declaration header fwd.h
Add Library Registry manifest file (#400)
Implement assignment operator for BigInteger (#404)
Add comments support (#443)
Adding coapp definition (#460)
documenttest.cpp: EXPECT_THROW when checking empty allocator (470)
GenericDocument: add implicit conversion to ParseResult (#480)
Use <wchar.h> with C++ linkage on Windows ARM (#485)
Detect little endian for Microsoft ARM targets
Check Nan/Inf when writing a double (#510)
Add JSON Schema Implementation (#522)
Add iostream wrapper (#530)
Add Jsonx example for converting JSON into JSONx (a XML format) (#531)
Add optional unresolvedTokenIndex parameter to Pointer::Get() (#532)
Add encoding validation option for Writer/PrettyWriter (#534)
Add Writer::SetMaxDecimalPlaces() (#536)
Support {0, } and {0, m} in Regex (#539)
Add Value::Get/SetFloat(), Value::IsLossLessFloat/Double() (#540)
Add stream position check to reader unit tests (#541)
Add Templated accessors and range-based for (#542)
Add (Pretty)Writer::RawValue() (#543)
Add Document::Parse(std::string), Document::Parse(const char*, size_t length) and related APIs. (#553)
Add move constructor for GenericSchemaDocument (#554)
Add VS2010 and VS2015 to AppVeyor CI (#555)
Add parse-by-parts example (#556, #562)
Support parse number as string (#564, #589)
Add kFormatSingleLineArray for PrettyWriter (#577)
Added optional support for trailing commas (#584)
Added filterkey and filterkeydom examples (#615)
Added npm docs (#639)
Allow options for writing and parsing NaN/Infinity (#641)
Add std::string overload to PrettyWriter::Key() when RAPIDJSON_HAS_STDSTRING is defined (#698)

Fixed

Fix gcc/clang/vc warnings (#350, #394, #397, #444, #447, #473, #515, #582, #589, #595, #667)
Fix documentation (#482, #511, #550, #557, #614, #635, #660)
Fix emscripten alignment issue (#535)
Fix missing allocator to uses of AddMember in document (#365)
CMake will no longer complain that the minimum CMake version is not specified (#501)
Make it usable with old VC8 (VS2005) (#383)
Prohibit C++11 move from Document to Value (#391)
Try to fix incorrect 64-bit alignment (#419)
Check return of fwrite to avoid warn_unused_result build failures (#421)
Fix UB in GenericDocument::ParseStream (#426)
Keep Document value unchanged on parse error (#439)
Add missing return statement (#450)
Fix Document::Parse(const Ch*) for transcoding (#478)
encodings.h: fix typo in preprocessor condition (#495)
Custom Microsoft headers are necessary only for Visual Studio 2012 and lower (#559)
Fix memory leak for invalid regex (26e69ffde95ba4773ab06db6457b78f308716f4b)
Fix a bug in schema minimum/maximum keywords for 64-bit integer (e7149d665941068ccf8c565e77495521331cf390)
Fix a crash bug in regex (#605)
Fix schema "required" keyword cannot handle duplicated keys (#609)
Fix cmake CMP0054 warning (#612)
Added missing include guards in istreamwrapper.h and ostreamwrapper.h (#634)
Fix undefined behaviour (#646)
Fix buffer overrun using PutN (#673)
Fix rapidjson::value::Get<std::string>() may returns wrong data (#681)
Add Flush() for all value types (#689)
Handle malloc() fail in PoolAllocator (#691)
Fix builds on x32 platform. #703