1 //===--- PPConditionalDirectiveRecord.h - Preprocessing Directives-*- C++ -*-=//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8 //
9 // This file implements the PPConditionalDirectiveRecord class, which maintains
10 // a record of conditional directive regions.
11 //
12 //===----------------------------------------------------------------------===//
13 #include "clang/Lex/PPConditionalDirectiveRecord.h"
14 #include "llvm/Support/Capacity.h"
15
16 using namespace clang;
17
PPConditionalDirectiveRecord(SourceManager & SM)18 PPConditionalDirectiveRecord::PPConditionalDirectiveRecord(SourceManager &SM)
19 : SourceMgr(SM) {
20 CondDirectiveStack.push_back(SourceLocation());
21 }
22
rangeIntersectsConditionalDirective(SourceRange Range) const23 bool PPConditionalDirectiveRecord::rangeIntersectsConditionalDirective(
24 SourceRange Range) const {
25 if (Range.isInvalid())
26 return false;
27
28 CondDirectiveLocsTy::const_iterator low = llvm::lower_bound(
29 CondDirectiveLocs, Range.getBegin(), CondDirectiveLoc::Comp(SourceMgr));
30 if (low == CondDirectiveLocs.end())
31 return false;
32
33 if (SourceMgr.isBeforeInTranslationUnit(Range.getEnd(), low->getLoc()))
34 return false;
35
36 CondDirectiveLocsTy::const_iterator
37 upp = std::upper_bound(low, CondDirectiveLocs.end(),
38 Range.getEnd(), CondDirectiveLoc::Comp(SourceMgr));
39 SourceLocation uppRegion;
40 if (upp != CondDirectiveLocs.end())
41 uppRegion = upp->getRegionLoc();
42
43 return low->getRegionLoc() != uppRegion;
44 }
45
findConditionalDirectiveRegionLoc(SourceLocation Loc) const46 SourceLocation PPConditionalDirectiveRecord::findConditionalDirectiveRegionLoc(
47 SourceLocation Loc) const {
48 if (Loc.isInvalid())
49 return SourceLocation();
50 if (CondDirectiveLocs.empty())
51 return SourceLocation();
52
53 if (SourceMgr.isBeforeInTranslationUnit(CondDirectiveLocs.back().getLoc(),
54 Loc))
55 return CondDirectiveStack.back();
56
57 CondDirectiveLocsTy::const_iterator low = llvm::lower_bound(
58 CondDirectiveLocs, Loc, CondDirectiveLoc::Comp(SourceMgr));
59 assert(low != CondDirectiveLocs.end());
60 return low->getRegionLoc();
61 }
62
addCondDirectiveLoc(CondDirectiveLoc DirLoc)63 void PPConditionalDirectiveRecord::addCondDirectiveLoc(
64 CondDirectiveLoc DirLoc) {
65 // Ignore directives in system headers.
66 if (SourceMgr.isInSystemHeader(DirLoc.getLoc()))
67 return;
68
69 assert(CondDirectiveLocs.empty() ||
70 SourceMgr.isBeforeInTranslationUnit(CondDirectiveLocs.back().getLoc(),
71 DirLoc.getLoc()));
72 CondDirectiveLocs.push_back(DirLoc);
73 }
74
If(SourceLocation Loc,SourceRange ConditionRange,ConditionValueKind ConditionValue)75 void PPConditionalDirectiveRecord::If(SourceLocation Loc,
76 SourceRange ConditionRange,
77 ConditionValueKind ConditionValue) {
78 addCondDirectiveLoc(CondDirectiveLoc(Loc, CondDirectiveStack.back()));
79 CondDirectiveStack.push_back(Loc);
80 }
81
Ifdef(SourceLocation Loc,const Token & MacroNameTok,const MacroDefinition & MD)82 void PPConditionalDirectiveRecord::Ifdef(SourceLocation Loc,
83 const Token &MacroNameTok,
84 const MacroDefinition &MD) {
85 addCondDirectiveLoc(CondDirectiveLoc(Loc, CondDirectiveStack.back()));
86 CondDirectiveStack.push_back(Loc);
87 }
88
Ifndef(SourceLocation Loc,const Token & MacroNameTok,const MacroDefinition & MD)89 void PPConditionalDirectiveRecord::Ifndef(SourceLocation Loc,
90 const Token &MacroNameTok,
91 const MacroDefinition &MD) {
92 addCondDirectiveLoc(CondDirectiveLoc(Loc, CondDirectiveStack.back()));
93 CondDirectiveStack.push_back(Loc);
94 }
95
Elif(SourceLocation Loc,SourceRange ConditionRange,ConditionValueKind ConditionValue,SourceLocation IfLoc)96 void PPConditionalDirectiveRecord::Elif(SourceLocation Loc,
97 SourceRange ConditionRange,
98 ConditionValueKind ConditionValue,
99 SourceLocation IfLoc) {
100 addCondDirectiveLoc(CondDirectiveLoc(Loc, CondDirectiveStack.back()));
101 CondDirectiveStack.back() = Loc;
102 }
103
Else(SourceLocation Loc,SourceLocation IfLoc)104 void PPConditionalDirectiveRecord::Else(SourceLocation Loc,
105 SourceLocation IfLoc) {
106 addCondDirectiveLoc(CondDirectiveLoc(Loc, CondDirectiveStack.back()));
107 CondDirectiveStack.back() = Loc;
108 }
109
Endif(SourceLocation Loc,SourceLocation IfLoc)110 void PPConditionalDirectiveRecord::Endif(SourceLocation Loc,
111 SourceLocation IfLoc) {
112 addCondDirectiveLoc(CondDirectiveLoc(Loc, CondDirectiveStack.back()));
113 assert(!CondDirectiveStack.empty());
114 CondDirectiveStack.pop_back();
115 }
116
getTotalMemory() const117 size_t PPConditionalDirectiveRecord::getTotalMemory() const {
118 return llvm::capacity_in_bytes(CondDirectiveLocs);
119 }
120