iKv

iKv is a small standalone C library for reading, writing, and building iKv data trees. It supports both text and binary formats, keeps the public API in a single header, and handles multiple on-disk versions behind one interface.

What it does

• Parse iKv text from strings or files
• Parse iKv binary blobs from memory or files
• Build object and array trees in memory
• Write text or binary output
• Auto-detect iKv1 vs iKv2 for generic parse calls
• Write the current format version by default, which is iKv2

Syntax preview

ikv2 "player_save"
{
    "title" "iKv demo"
    "version" 2
    "player" {
        "name" "jondoe"
        "alive" true
        "speed" 12.5
    }
    "inventory" [
        "wrench"
        "battery"
        "map"
    ]
}

Library example

#include "ikv.h"

ikv_node_t *root = ikv_create_object("demo");
ikv_node_t *player = ikv_object_add_object(root, "player");

ikv_object_set_string(root, "title", "iKv demo");
ikv_object_set_int(root, "version", 2);
ikv_object_set_string(player, "name", "jondoe");
ikv_object_set_bool(player, "alive", true);

ikv_write_file("demo_output.ikv", root);
ikv_free(root);

Build

CMake

cmake -S . -B build
cmake --build build

This produces the reusable static library target:

• ikv
• ikv::ikv for CMake consumers

Example consumer usage:

add_subdirectory(path/to/iKv)
target_link_libraries(your_target PRIVATE ikv::ikv)

Script build

For the repo-local non-CMake build path used in CI:

./demo/build.sh

Project layout

• include/ikv.h: public API
• src/ikv.c: shared implementation and loader dispatch
• src/loaders/ikv1.c: iKv1 loader
• src/loaders/ikv2.c: iKv2 loader
• src/internal/ikv_internal.h: private internals and loader interface
• demo/main.c: small usage example
• demo/unit_test.c: unit tests

Format behavior

• Generic parse APIs auto-detect iKv1 and iKv2
• Generic write APIs default to iKv2
• Public callers do not need loader-specific headers
• iKv2 binary files use an indexed root layout with key tables and payload offsets
• iKv1 binary files remain supported for compatibility

Public API

The public interface is declared in include/ikv.h. Key areas include:

• node creation and cleanup
• object and array mutation
• scalar accessors
• text parse/write APIs
• binary parse/write APIs
• explicit versioned APIs when auto-detection is not desired

License

This repository currently ships with the license text in LICENSE:

• Creative Commons Attribution-ShareAlike 4.0 International (CC BY-SA 4.0)

Extending the format

To add a new format version:

1. Add src/loaders/ikv3.h and src/loaders/ikv3.c exporting an ikv_loader_t
2. Implement the loader
3. Register it in src/ikv.c
4. Add a public version constant to include/ikv.h if needed