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QNX Software Development Platform
QNX SDP is a cross-compiling and debugging environment, including an IDE and command-line tools, for building binary images and programs for target boards running QNX Neutrino 7.1.
Utilities & Libraries
JSON Library Reference
JSON Decoding and Encoding API
JSON encoder functionality
json_encoder_format_t
JSON encoder data format codes

QNX Momentics IDE User's Guide
This User's Guide describes version 7.1 of the Integrated Development Environment (IDE) that's part of the QNX Momentics tool suite.
QNX Software Development Platform
QNX SDP is a cross-compiling and debugging environment, including an IDE and command-line tools, for building binary images and programs for target boards running QNX Neutrino 7.1.
- Quickstart Guide
- OS Components & Operations
- Audio & Graphics API
- Multimedia
- Networking Middleware
- Programming
- Sensor Framework
- System Security Guide
  The QNX System Security Guide is intended for both system integrators who are responsible for the security of a QNX Neutrino RTOS system and developers who want to create a QNX Neutrino resource manager free from vulnerabilities.
- Utilities & Libraries
  - Addon Interfaces Library Reference
  - C Library Reference
  - Devctl and Ioctl Commands
  - JSON Library Reference
    - JSON Library Overview
      The JSON library, libjson, allows applications to decode and encode JSON data. This is useful for reading and interpreting complex data or transferring data between systems.
    - JSON Decoding and Encoding API
      - JSON decoder functionality
      - JSON encoder functionality
        json_encoder_t
        JSON encoder structure
        json_encoder_access_buffer()
        Get a read/write pointer to the JSON encoder's data buffer
        json_encoder_add_bool()
        Add a boolean value to the JSON encoder
        json_encoder_add_double()
        Add a double value to the JSON encoder
        json_encoder_add_from_decoder()
        Add items from a JSON decoder to the JSON encoder
        json_encoder_add_int()
        Add an integer value to the JSON encoder
        json_encoder_add_int_ll()
        Add a long long integer value to the JSON encoder
        json_encoder_add_json()
        Add a JSON-encoded string value to the JSON encoder
        json_encoder_add_null()
        Add a null value to the JSON encoder
        json_encoder_add_property_name()
        Create a property in the JSON encoder
        json_encoder_add_string()
        Add a string value to the JSON encoder
        json_encoder_add_whitespace()
        Add whitespace to the JSON encoder before the next name, value, or {, }, [, or ] character
        json_encoder_buffer()
        Get a read-only pointer to the JSON encoder's data buffer
        json_encoder_cleanup()
        Clean up a JSON encoder instance, freeing any associated memory
        json_encoder_clear_option()
        Clear a JSON encoder option
        json_encoder_create()
        Create a new JSON encoder instance
        json_encoder_destroy()
        Destroy a JSON encoder instance
        json_encoder_end_array()
        End the current array in the JSON encoder
        json_encoder_end_object()
        End the current object in the JSON encoder
        json_encoder_error_t
        JSON encoder error codes
        json_encoder_format_t
        JSON encoder data format codes
        json_encoder_get_state()
        Get the current state of the JSON encoder
        json_encoder_get_status()
        Get the error status of the JSON encoder
        json_encoder_length()
        Get the current data length in the JSON encoder
        json_encoder_nesting_level()
        Get the current nesting level in the JSON encoder
        json_encoder_option_t
        Options for controlling JSON encoding behavior
        json_encoder_reserve_space()
        Reserve space for a given number of bytes in the JSON encoder's buffer
        json_encoder_reset()
        Reset a JSON encoder instance
        json_encoder_set_format()
        Set the JSON encoder format
        json_encoder_set_option()
        Set a JSON encoder option
        json_encoder_set_state()
        Set the state of the JSON encoder
        json_encoder_set_status()
        Set the error status of the JSON encoder
        json_encoder_start_array()
        Start a new array in the JSON encoder
        json_encoder_start_object()
        Start a new object in the JSON encoder
        json_encoder_state_t
        JSON encoder state
      - JSON utility functions
  - PAM Reference
  - Utilities Reference
  - WPA Control Interface Reference
    This document provides a reference for the Wi-Fi Protected Access (WPA) control interface, which provides a C API for the WPA/IEEE 802.11i protocols in Wi-Fi client stations. Application developers who want to control WPA operations and get associated status and event data should read this reference.
QNX Hypervisor
The QNX Hypervisor allows you to run multiple OSs on a target system so you can separate critical and non-critical functions, support a wide variety of applications, and reduce hardware costs.
QNX Software in the Cloud
QNX Software in the Cloud enables developers to use the QNX software in Amazon Web Services (AWS) and Microsoft Azure (Azure).
QNX Advanced Virtualization Frameworks User's Guide
This User's Guide is aimed at all systems integrators and developers who want to design and build embedded systems using the QNX Advanced Virtualization Frameworks.
Typographical Conventions, Support, and Licensing
This section describes the typographical conventions used throughout the documentation and explains how to obtain technical support.

json_encoder_format_t

JSON encoder data format codes

Synopsis:

#include <sys/json.h>

typedef enum {
    JSON_ENCODER_FORMAT_JSON = 0
} json_encoder_format_t;

Data:

JSON_ENCODER_FORMAT_JSON: Encode in plain JSON format (see http://www.json.org).

Library:

libjson

Description:

These values determine the resulting format of data encoded with the JSON encoder API.

Page updated: March 12, 2026