A constrained node implementation of CBOR in C
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cabo Merge pull request #47 from kaspar030/make_ntohxp_alignment_safe
implement alignment-safe ntoh16p() && ntoh32p()
Latest commit f1cf9ff Apr 4, 2018
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cmake Add branch coverage. Lots more tests needed, particularly ones that f… Apr 5, 2015
include cn-create: add cn_cbor_float_create Feb 26, 2018
src fixup! fixup! implement alignment-safe ntoh16p() && ntoh32p() Mar 23, 2018
test test: add create double test Feb 26, 2018
.gitignore cmake working Mar 31, 2015
.travis.yml Make Travis cmake builds less interesting, hopefully faster as well Nov 17, 2015
Doxyfile.in cmake working Mar 31, 2015
LICENSE Add MIT LICENSE file Mar 13, 2015
README.md Add travis badge Aug 27, 2015
Simple-Makefile Merge branch 'spudlib-merge' of https://github.com/hildjj/cn-cbor int… Apr 2, 2015
build.sh Missing scratchbang somehow. Aug 26, 2015


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cn-cbor: A constrained node implementation of CBOR in C

This is a constrained node implementation of CBOR in C that I threw together in 2013, before the publication of RFC 7049, to validate certain implementability considerations.

Its API model was inspired by nxjson. It turns out that this API model actually works even better with the advantages of the CBOR format.

This code has been used in a number of research implementations on constrained nodes, with resulting code sizes appreciably under 1 KiB on ARM platforms.

I always meant to improve the interface some more with certain API changes, in order to get even closer to 0.5 KiB, but I ran out of time. So here it is. If I do get around to making these changes, the API will indeed change a bit, so please be forewarned.


There is a Simple-Makefile for playing around, as well as a complete cmake-based build environment. (You can choose what fits your needs better.)

Building with cmake:


Building including testing:

./build.sh all test

Generating a test coverage report (requires lcov[^1]; result in build/lcov/index.html):

./build.sh all coveralls coverage_report

License: MIT

[^1]: Installation with homebrew: brew install lcov