Decode ASCII Punycode to Unicode domain labels (low-level)

Converts ASCII Punycode (`xn–`) domain names back to their Unicode representation. This is the inverse of [puny_encode()] and is the raw RFC 3492 transform with A-label framing checks.

Usage

puny_decode(x, strict = getOption("punycoder.strict", TRUE))

Arguments

x: Character vector of ASCII punycode domains to decode
strict: Logical; whether to apply strict validation. Defaults to `getOption("punycoder.strict", TRUE)`.

Value

A character vector the same length as x, with each element containing the Unicode-decoded domain name. Elements corresponding to NA inputs are NA_character_. In non-strict mode, domains that fail decoding are also returned as NA_character_.

Details

Like [puny_encode()], this is a **low-level ASCII-Compatible Encoding helper, not an IDNA normalization API**: it does not apply UTS #46 mapping or NFC. For IDNA/UTS-46 host normalization, see [host_normalize()].

Examples

# \donttest{
# Basic decoding
puny_decode("xn--caf-dma.com")
#> [1] "café.com"
puny_decode("xn--80adxhks.xn--p1ai")
#> [1] "москва.рф"

# Vectorized decoding
ascii_domains <- c("xn--caf-dma.com", "xn--80adxhks.xn--p1ai")
puny_decode(ascii_domains)
#> [1] "café.com"  "москва.рф"
# }