janssonr: Strict JSON Encoding and Decoding via the 'Jansson' C Library
An R-safe profile of RFC 8259 JSON: parsing and generation backed by the 'Jansson' C library, linked as a system library where one is available and compiled from the bundled sources otherwise. The parser rejects, with classed conditions carrying line, column, and byte position: malformed or truncated input, trailing content, duplicate object keys at any depth, invalid UTF-8, escapes encoding a null character, reals overflowing double, and integer literals whose magnitude exceeds 2^53, the range within which a double represents every integer exactly. Number literals with a fraction or exponent convert by ordinary correctly rounded IEEE 754 double conversion. Objects decode to named lists in key order, arrays to unnamed lists, and scalars to length-one vectors. The encoder maps named lists to objects in insertion order, unnamed lists to arrays, guarantees that every finite double, signed zero included, round-trips to the exact same value (whole-number doubles are written as integers), and refuses values with no faithful JSON representation (NA, NaN, infinities, named atomic vectors, classed objects) instead of guessing. No R package dependencies.
| Version: | 0.1.2 |
| Depends: | R (≥ 4.4.0) |
| Suggests: | tinytest |
| Published: | 2026-09-12 |
| DOI: | 10.32614/CRAN.package.janssonr (may not be active yet) |
| Author: | Troy Hernandez 
[aut, cre],
cornball.ai [cph],
Petri Lehtinen [ctb, cph] (Author of the Jansson C library, bundled
under src/jansson),
Basile Starynkevitch [ctb, cph] (Jansson: src/jansson/memory.c),
Graeme Smecher [ctb, cph] (Jansson: src/jansson/pack_unpack.c),
Sean Bright [ctb, cph] (Jansson: src/jansson/version.c),
David M. Gay [ctb] (Author of dtoa.c, bundled by Jansson as
src/jansson/dtoa.c),
Lucent Technologies [cph] (src/jansson/dtoa.c),
Bob Jenkins [ctb] (Author of lookup3.c (public domain), bundled by
Jansson as src/jansson/lookup3.h) |
| Maintainer: | Troy Hernandez <troy at cornball.ai> |
| BugReports: | https://github.com/cornball-ai/janssonr/issues |
| License: | MIT + file LICENSE |
| Copyright: | cornball.ai, except the bundled Jansson sources under
src/jansson, whose per-file copyright holders and license
statements are listed in inst/COPYRIGHTS. janssonr copyright details |
| URL: | https://github.com/cornball-ai/janssonr |
| NeedsCompilation: | yes |
| SystemRequirements: | jansson (>= 2.11) is linked when present: libjansson-dev (deb), jansson-devel (rpm), jansson (brew). When it is absent, and always on Windows, the bundled Jansson 2.15.1 is compiled into the package. |
| Materials: | README, NEWS |
| CRAN checks: | janssonr results |
Documentation:
| Reference manual: | janssonr.html , janssonr.pdf |
Downloads:
| Package source: | janssonr_0.1.2.tar.gz |
| Windows binaries: | r-devel: not available, r-release: not available, r-oldrel: not available |
| macOS binaries: | r-release (arm64): not available, r-oldrel (arm64): janssonr_0.1.2.tgz, r-release (x86_64): janssonr_0.1.2.tgz, r-oldrel (x86_64): janssonr_0.1.2.tgz |
Linking:
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