1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
|
// Copyright (C) 2013 Romain Francois
//
// This file is part of Rcpp.
//
// Rcpp is free software: you can redistribute it and/or modify it
// under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 2 of the License, or
// (at your option) any later version.
//
// Rcpp is distributed in the hope that it will be useful, but
// WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with Rcpp. If not, see <http://www.gnu.org/licenses/>.
#ifndef Rcpp_api_meat_Rcpp_eval_h
#define Rcpp_api_meat_Rcpp_eval_h
#include <Rcpp/Interrupt.h>
#include <Rversion.h>
namespace Rcpp { namespace internal {
#ifdef RCPP_USING_UNWIND_PROTECT
struct EvalData {
SEXP expr;
SEXP env;
EvalData(SEXP expr_, SEXP env_) : expr(expr_), env(env_) { }
};
inline SEXP Rcpp_protected_eval(void* eval_data) {
EvalData* data = static_cast<EvalData*>(eval_data);
return ::Rf_eval(data->expr, data->env);
}
// This is used internally instead of Rf_eval() to make evaluation safer
inline SEXP Rcpp_eval_impl(SEXP expr, SEXP env) {
return Rcpp_fast_eval(expr, env);
}
#else // R < 3.5.0
// Fall back to Rf_eval() when the protect-unwind API is unavailable
inline SEXP Rcpp_eval_impl(SEXP expr, SEXP env) {
return ::Rf_eval(expr, env);
}
#endif
}} // namespace Rcpp::internal
namespace Rcpp {
#ifdef RCPP_USING_UNWIND_PROTECT
inline SEXP Rcpp_fast_eval(SEXP expr, SEXP env) {
internal::EvalData data(expr, env);
return unwindProtect(&internal::Rcpp_protected_eval, &data);
}
#else
inline SEXP Rcpp_fast_eval(SEXP expr, SEXP env) {
return Rcpp_eval(expr, env);
}
#endif
inline SEXP Rcpp_eval(SEXP expr, SEXP env) {
// 'identity' function used to capture errors, interrupts
Shield<SEXP> identity(Rf_findFun(::Rf_install("identity"), R_BaseNamespace));
if (identity == R_UnboundValue) {
stop("Failed to find 'base::identity()'");
}
// define the evalq call -- the actual R evaluation we want to execute
Shield<SEXP> evalqCall(Rf_lang3(::Rf_install("evalq"), expr, env));
// define the call -- enclose with `tryCatch` so we can record and forward error messages
Shield<SEXP> call(Rf_lang4(::Rf_install("tryCatch"), evalqCall, identity, identity));
SET_TAG(CDDR(call), ::Rf_install("error"));
SET_TAG(CDDR(CDR(call)), ::Rf_install("interrupt"));
Shield<SEXP> res(internal::Rcpp_eval_impl(call, R_BaseEnv));
// check for condition results (errors, interrupts)
if (Rf_inherits(res, "condition")) {
if (Rf_inherits(res, "error")) {
Shield<SEXP> conditionMessageCall(::Rf_lang2(::Rf_install("conditionMessage"), res));
Shield<SEXP> conditionMessage(internal::Rcpp_eval_impl(conditionMessageCall, R_BaseEnv));
throw eval_error(CHAR(STRING_ELT(conditionMessage, 0)));
}
// check for interrupt
if (Rf_inherits(res, "interrupt")) {
throw internal::InterruptedException();
}
}
return res;
}
} // namespace Rcpp
#endif
|
