Mor int64 support.

NEWS.md

@@ -4,8 +4,14 @@
 
 * New function `vector_length` as a hybrid between `length` and `nrow`.
 
-* Limited support added for 'integer64' objects. This applies to the
-`NA` related functions as well as the GCD and LCM functions.
+* `gcd` and `scm` now make use of 64-bit integers internally and can accept
+'integer64' objects. `scm` used to return `NA` once the 32-bit integer limit
+of 2^31 - 1 was reached if the input was an integer vector. 
+This has now been increased to the 64-bit integer limit, 
+which is approximately 9.223372e+18.
+
+* 'integer64' objects are now lightly supported. They are not 
+supported in any sequence functions or in the 'set_math' functions.
 
 * New functions `new_df` and `named_dots`.
 

src/altrep_utils.cpp → src/altrep.cpp

@@ -75,28 +75,3 @@ SEXP altrep_materialise(SEXP x) {
   // if (ALTREP(x)) DATAPTR(x);
   // return x;
 }
-
-// SEXP altrep_materialise(SEXP x) {
-//   if (!ALTREP(x)) return x;
-//   SEXP out;
-//   R_xlen_t n = Rf_xlength(x);
-//   switch (TYPEOF(x)) {
-//   case INTSXP: {
-//     out = Rf_protect(Rf_allocVector(INTSXP, n));
-//     INTEGER_GET_REGION(x, 0, n, INTEGER(out));
-//     break;
-//   }
-//   case REALSXP: {
-//     out = Rf_protect(Rf_allocVector(REALSXP, n));
-//     REAL_GET_REGION(x, 0, n, REAL(out));
-//     break;
-//   }
-//   default: {
-//     // This is a pretty hacky way of doing it..
-//     cpp11::function base_subset = cpp11::package("base")["["];
-//     out = Rf_protect(base_subset(x));
-//   }
-//   }
-//   Rf_unprotect(1);
-//   return out;
-// }

src/cpp11.cpp

@@ -5,14 +5,14 @@
 #include "cpp11/declarations.hpp"
 #include <R_ext/Visibility.h>
 
-// altrep_utils.cpp
+// altrep.cpp
 bool is_compact_seq(SEXP x);
 extern "C" SEXP _cheapr_is_compact_seq(SEXP x) {
   BEGIN_CPP11
     return cpp11::as_sexp(is_compact_seq(cpp11::as_cpp<cpp11::decay_t<SEXP>>(x)));
   END_CPP11
 }
-// altrep_utils.cpp
+// altrep.cpp
 SEXP compact_seq_data(SEXP x);
 extern "C" SEXP _cheapr_compact_seq_data(SEXP x) {
   BEGIN_CPP11