CODEWITHSUNDEEP
jsong++mingw-w64
oldpride
oldpride

Reputation: 955

how to parse JSON string in mingw-w64 g++ on Windows 10?

I am writing C++ using mingw-w64 g++ on windows with VS Code.

I need to be able to parse some JSON string.

mingw doesn't seem to have any built-in JSON support.

What is the way to set up JSON support in mingw-w64 on windows 10?

Upvotes: 0

Views: 585

Answers (2)

oldpride
oldpride

Reputation: 955

Following Brecht's list, I tried json-parser. The following is how I made it to work. Hope this will help folks not familiar with the process

Do this from Msys terminal which came with MinGw G++, becaue it has 'make' command.

   cd mycppbase
   git clone https://github.com/json-parser/json-parser.git

   cd json-parser
   export PATH=/c/msys64/mingw64/bin:$PATH
   ./configure
   make

   three files are important
   json.h
   libjsonparser.a
   libjsonparser.so

   cd myexampledir/
   g++ myjson.cpp -o myjson \
    -I "/c/.../mycppbase/json-parser" \
    -L "/c/.../mycppbase/json-parser" \
    -l:libjsonparser.a

UPDATE: 2022/11/20

the previous example is to link a static executable.

To link dynamically, we need to rename the .so file to .dll file. (see comments below)

The following is done in gitbash terminal and worked.

mv libjsonparser.so libjsonparser.dll
cd myexampledir/
g++ myjson.cpp -o myjson \
        -I "/c/.../mycppbase/json-parser" \
        -L "/c/.../mycppbase/json-parser" \
        -ljsonparser

Upvotes: 1

Brecht Sanders
Brecht Sanders

Reputation: 7287

There are quite a few libraries for handling JSON from C/C++ that you can use.

To name a few that I have been able to compile with MinGW-w64:

JSON-C

Description : JSON-C implements a reference counting object model that allows you to easily construct JSON objects in C, output them as JSON formatted strings and parse JSON formatted strings back into the C representation of JSON objects.

https://github.com/json-c/json-c

libjansson

Description : Jansson is a C library for encoding, decoding and manipulating JSON data.

http://www.digip.org/jansson/

libjson-glib

Description : JSON-GLib is a library providing serialization and deserialization support for the JavaScript Object Notation (JSON) format described by RFC 4627. Website URL : http://live.gnome.org/JsonGlib

json-parser

Description : Very low footprint JSON parser written in portable ANSI C

https://github.com/udp/json-parser

jsonh

Description : json parser for C and C++

https://github.com/sheredom/json.h

jsmn

Description : jsmn (pronounced like "jasmine") is a minimalistic JSON parser in C. It can be easily integrated into the resource-limited projects or embedded systems.

http://zserge.com/jsmn.html

tiny-json

Description : tiny-json is a versatile and easy to use json parser in C suitable for embedded systems. It is fast, robust and portable. It is not only a tokenizer. You can get data in string format or get the primitives values in C type variables without performance loss.

https://github.com/rafagafe/tiny-json

ujson4c

Description : A more user friendly layer for decoding JSON in C/C++ based on the ultra fast UltraJSON library

https://github.com/esnme/ujson4c/

cajun-jsonapi

Description : CAJUN is a C++ API for the JSON data interchange format with an emphasis on an intuitive, concise interface. The library provides JSON types and operations that mimic standard C++ as closely as possible in concept and design.

https://github.com/cajun-jsonapi/cajun-jsonapi

frozen

Description : JSON parser and generator for C/C++ with scanf/printf like interface. Targeting embedded systems. Website URL : https://github.com/cesanta/frozen

jq

Description : jq is a lightweight and flexible command-line JSON processor.

https://stedolan.github.io/jq/

js0n

Description : Flexible Zero-Footprint JSON Parser in C

https://github.com/quartzjer/js0n

libfastjson

Description : a fast json library for C

https://github.com/rsyslog/libfastjson

libxo

Description : The libxo library allows an application to generate text, XML, JSON, and HTML output using a common set of function calls. The application decides at run time which output style should be produced.

https://github.com/Juniper/libxo

microjson

Description : Tiny JSON parser in C that uses only fixed-extent storage.

http://www.catb.org/esr/microjson/

minijsonreader

Description : A DOM-less JSON parser that can parse a JSON object without allocating a single byte of memory

https://github.com/giacomodrago/minijson_reader

minijsonwriter

Description : A simple, little-overhead, allocation-free, and extensible C++ JSON writer, directly wrapping a std::ostream

https://github.com/giacomodrago/minijson_writer

pdjson

Description : A public domain JSON parser focused on correctness, ANSI C99 compliance, full Unicode (UTF-8) support, minimal memory footprint, and a simple API. As a streaming API, arbitrary large JSON could be processed with a small amount of memory (the size of the largest string in the JSON). It seems most C JSON libraries suck in some significant way: broken string support (what if the string contains \u0000?), broken/missing Unicode support, or crappy software license (GPL or "do no evil"). This library intends to avoid these flaws.

https://github.com/skeeto/pdjson

picojson

Description : a header-file-only, JSON parser serializer in C++

https://github.com/kazuho/picojson

sajson

Description : Lightweight, extremely high-performance JSON parser for C++11

https://github.com/chadaustin/sajson

smalljsonparser

Description : This is a simple, one-file JSON parser in C. It is designed for highly resource-constrained systems. It uses no memory allocation, and can stream data, so that the whole file does not need to reside in memory.

https://github.com/DagAgren/SmallJSONParser

univalue

Description : C++ universal value object and JSON library

https://github.com/jgarzik/univalue

Upvotes: 1

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