blob: 46da677dc1014f5399cd2b83553fe28c680e215d (
plain)
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
|
//==- AnnexKDetection.cpp - Annex K availability detection -------*- C++ -*-==//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
//
// This file contains the implementation of utilities for detecting C11 Annex K
// (Bounds-checking interfaces) availability.
//
//===----------------------------------------------------------------------===//
#include "clang/Analysis/AnnexKDetection.h"
#include "clang/Basic/LangOptions.h"
#include "clang/Lex/Preprocessor.h"
namespace clang::analysis {
[[nodiscard]] bool isAnnexKAvailable(Preprocessor *PP, const LangOptions &LO) {
if (!LO.C11)
return false;
assert(PP && "No Preprocessor registered.");
if (!PP->isMacroDefined("__STDC_LIB_EXT1__") ||
!PP->isMacroDefined("__STDC_WANT_LIB_EXT1__"))
return false;
const auto *MI =
PP->getMacroInfo(PP->getIdentifierInfo("__STDC_WANT_LIB_EXT1__"));
if (!MI || MI->tokens_empty())
return false;
const Token &T = MI->tokens().back();
if (!T.isLiteral() || !T.getLiteralData())
return false;
return StringRef(T.getLiteralData(), T.getLength()) == "1";
}
} // namespace clang::analysis
|
