Micro-toolkit

microcbor

Text payloads waste bytes and parsing work on constrained links.

A zero-allocation encoder/decoder implements a definite-length RFC 8949 subset.

DevelopmentMITC99
GitHubQuick Start
Last verified
Not audited against current README/docs
Platform scope
Portable C99; integration depends on caller-provided adapters

What it solves

Text payloads waste bytes and parsing work on constrained links.

How it works

1Values→2caller buffer encoder→3CBOR bytes

Use it when

Encode compact telemetry maps
Decode known typed fields
Skip unknown fields for forward compatibility

Quick Start

#include "mcbor.h"
uint8_t buf[64]; mcbor_enc_t e; size_t used=0;
mcbor_enc_init(&e,buf,sizeof buf);
mcbor_enc_map(&e,1); mcbor_enc_str(&e,"ok"); mcbor_enc_bool(&e,true);
mcbor_enc_size(&e,&used);
/* Expected: used reports a compact definite-length CBOR map. */

Engineering evidence

  • README documents zero allocation and the exact implemented subset

Known limits

  • No 64-bit integers, indefinite items or tags
  • Implements a subset, not all RFC 8949 features