1 // Licensed to the Apache Software Foundation (ASF) under one
2 // or more contributor license agreements.  See the NOTICE file
3 // distributed with this work for additional information
4 // regarding copyright ownership.  The ASF licenses this file
5 // to you under the Apache License, Version 2.0 (the
6 // "License"); you may not use this file except in compliance
7 // with the License.  You may obtain a copy of the License at
8 //
9 //   http://www.apache.org/licenses/LICENSE-2.0
10 //
11 // Unless required by applicable law or agreed to in writing,
12 // software distributed under the License is distributed on an
13 // "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
14 // KIND, either express or implied.  See the License for the
15 // specific language governing permissions and limitations
16 // under the License.
17 
18 #include <R_ext/Rdynload.h>  // for R_GetCCallable
19 #include <Rdefines.h>
20 
21 namespace vctrs {
22 struct vctrs_api_ptrs_t {
23   R_len_t (*short_vec_size)(SEXP x);
24 
vctrs_api_ptrs_tvctrs::vctrs_api_ptrs_t25   vctrs_api_ptrs_t() {
26     short_vec_size = (R_len_t(*)(SEXP))R_GetCCallable("vctrs", "short_vec_size");
27   }
28 };
29 
vctrs_api()30 const vctrs_api_ptrs_t& vctrs_api() {
31   static vctrs_api_ptrs_t ptrs;
32   return ptrs;
33 }
34 
vec_size(SEXP x)35 R_len_t vec_size(SEXP x) {
36   if (Rf_inherits(x, "data.frame") || TYPEOF(x) != VECSXP || Rf_inherits(x, "POSIXlt")) {
37     return vctrs_api().short_vec_size(x);
38   } else {
39     return Rf_length(x);
40   }
41 }
42 
43 }  // namespace vctrs
44