Module encoding 

Encoding / locale probing utilities.

This module exists mainly for debugging + experiments around R’s string encodings. R’s runtime has both:

• per-CHARSXP encoding tags (UTF-8 / Latin-1 / bytes / native)
• global/locale-level settings (native encoding, UTF-8 locale flags)

Availability

The global signals are non-API (from Defn.h) and require the nonapi feature. Additionally, these symbols are not exported from R’s shared library, so miniextendr_encoding_init() only works when:

• Embedding R via miniextendr-engine (which links directly to R internals)
• Running on platforms where these symbols happen to be exported

For R packages (loaded via .Call), these symbols are typically unavailable, so miniextendr_encoding_init() is disabled by default in the entrypoint. The module is still useful for standalone Rust applications embedding R.

Structs

REncodingInfo

Cached snapshot of R’s encoding / locale state at init time.

Statics

ENCODING_INFO 🔒

Functions

encoding_info

Return the cached encoding info (if miniextendr_encoding_init() has run).

miniextendr_assert_utf8_locale

Assert that R’s locale is UTF-8.

miniextendr_encoding_init

Initialize / snapshot R’s encoding state.