Function R_nchar 

unsafe fn R_nchar(
    x: SEXP,
    ntype: c_int,
    allowNA: Rboolean,
    keepNA: Rboolean,
    msg_name: *const c_char,
) -> c_int

Get the number of characters in a string/character.

Parameters

• x: A string SEXP
• ntype: Type of count (0=bytes, 1=chars, 2=width)
• allowNA: Whether to allow NA values
• keepNA: Whether to keep NA in result
• msg_name: Name for error messages

Returns

Character count or -1 on error. Checked wrapper for R_nchar. Calls R_nchar_unchecked and routes through with_r_thread. Generated from source location line 3678, column 8. Generated from source file miniextendr-api/src/ffi.rs.