https://github.com/ohler55/ojc

Optimized JSON in C
https://github.com/ohler55/ojc

callback fast json json-elements json-parsing ojc parser

Last synced: 6 days ago
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Optimized JSON in C

• Host: GitHub
• URL: https://github.com/ohler55/ojc
• Owner: ohler55
• License: mit
• Created: 2014-05-22T19:51:11.000Z (over 10 years ago)
• Default Branch: master
• Last Pushed: 2024-04-24T21:40:21.000Z (8 months ago)
• Last Synced: 2024-11-29T21:12:15.198Z (14 days ago)
• Topics: callback, fast, json, json-elements, json-parsing, ojc, parser
• Language: C
• Homepage:
• Size: 582 KB
• Stars: 34
• Watchers: 3
• Forks: 8
• Open Issues: 1
• Metadata Files:
  • Readme: README.md
  • Changelog: CHANGELOG.md
  • License: LICENSE

Awesome Lists containing this project

• awesome-json - ojc - A fast JSON parser. (Libraries)

README

        
# [![{}j](misc/ojc_comet.svg)](http://www.ohler.com/ojc) [![Build Status](https://img.shields.io/travis/ohler55/ojc/master.svg?logo=travis)](http://travis-ci.org/ohler55/ojc?branch=master)

Optimized JSON in C

## Description

Optimized JSON in C (OjC), as the name implies, was written to provide

optimized JSON handling. It is derived from the underlying C parser in

[Oj](http://www.ohler.com/oj) and more recently

[OjG](https://github.com/ohler55/ojg). The intended use is for

applications that need the maximum performance when reading large JSON

document from a file or socket.

Besides being a true streaming parser OjC produces a structure that handles all

JSON constructs. It does not use a Hash or Map to represent the JSON object type

but keeps all occurances of a pairs in the object element.

Multiple JSON elements are allowed in a single stream or from a socket. A

callback mechanism is provided to return full JSON elements for each entry in a

JSON stream.

## Simple JSON Parsing Example

```c

#include 

#include "oj/oj.h"

int

main(int argc, char **argv) {

    const char      *str ="{\"num\": 12.34e567}"

    struct _ojErr   err = OJ_ERR_INIT;

    ojVal           val;

    if (NULL == (val = oj_parse_str(&err, str, NULL))) {

        printf("Parse error: %s at %d:%d\n", err.msg, err.line, err.col);

    } else {

        oj_destroy(val);

    }

    oj_cleanup();

    return err.code;

}

```

More example can be be found in the [examples](examples) directory.

## Benchmarks and Comparisons

A comparison of OjC and simdjson is in the [compare](compare)

directory with results in the [results.md](compare/results.md) file.

For a more entertaining comparison take a look at [OjC and Simdjson racing](misc/compete.md).

## Documentation

*Documentation*: http://www.ohler.com/ojc

## Source

*GitHub* *repo*: https://github.com/ohler55/ojc

## Releases

See [CHANGELOG](CHANGELOG.md)