R_CHAR: Convert a string scalar (CHARSXP) to a C-string (char *)

In ramiromagno/c3po: From C to R and back again

Description

\Sexpr[results=rd, stage=render]{c3po:::badge('fnp')} \Sexpr[results=rd, stage=render]{c3po:::badge('r2c')}

Convert a string scalar (CHARSXP) to a C-string (char *).

Arguments

x	a pointer SEXP, of type CHARSXP.

Value

C string, i.e., a pointer char *.

Declaration

const char *(R_CHAR)(SEXP x);

In Rinternals.h.

Definition

const char *(R_CHAR)(SEXP x) {
  if(TYPEOF(x) != CHARSXP) // Han-Tak proposes to prepend  'x && '
  error("%s() can only be applied to a '%s', not a '%s'",
        "CHAR", "CHARSXP", type2char(TYPEOF(x)));
  return (const char *) CHAR(CHK(x));
}

In memory.c.

See Also

Rf_asChar

ramiromagno/c3po documentation built on Jan. 5, 2021, 8:01 p.m.