LLVM: lib/Support/LineIterator.cpp Source File (original) (raw)
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12using namespace llvm;
13
15 if (*P == '\n')
16 return true;
17 if (*P == '\r' && *(P + 1) == '\n')
18 return true;
19 return false;
20}
21
23 if (*P == '\n') {
24 ++P;
25 return true;
26 }
27 if (*P == '\r' && *(P + 1) == '\n') {
28 P += 2;
29 return true;
30 }
31 return false;
32}
33
35 char CommentMarker)
36 : line_iterator(Buffer.getMemBufferRef(), SkipBlanks, CommentMarker) {}
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39 char CommentMarker)
40 : Buffer(Buffer.getBufferSize() ? std::optional<MemoryBufferRef>(Buffer)
41 : std::nullopt),
42 CommentMarker(CommentMarker), SkipBlanks(SkipBlanks),
43 CurrentLine(Buffer.getBufferSize() ? Buffer.getBufferStart() : nullptr,
44 0) {
45
46
47 if (Buffer.getBufferSize()) {
48 assert(Buffer.getBufferEnd()[0] == '\0');
49
50 if (SkipBlanks || !isAtLineEnd(Buffer.getBufferStart()))
51 advance();
52 }
53}
54
55void line_iterator::advance() {
56 assert(Buffer && "Cannot advance past the end!");
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58 const char *Pos = CurrentLine.end();
59 assert(Pos == Buffer->getBufferStart() || isAtLineEnd(Pos) || *Pos == '\0');
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62 ++LineNumber;
64
65 } else if (CommentMarker == '\0') {
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68 ++LineNumber;
69 } else {
70
71 for (;;) {
73 break;
74 if (*Pos == CommentMarker)
75 do {
76 ++Pos;
77 } while (*Pos != '\0' && (Pos));
79 break;
80 ++LineNumber;
81 }
82 }
83
84 if (*Pos == '\0') {
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86 Buffer = std::nullopt;
87 CurrentLine = StringRef();
88 return;
89 }
90
91
95 }
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97 CurrentLine = StringRef(Pos, Length);
98}
assert(UImm &&(UImm !=~static_cast< T >(0)) &&"Invalid immediate!")
static bool skipIfAtLineEnd(const char *&P)
Definition LineIterator.cpp:22
static bool isAtLineEnd(const char *P)
Definition LineIterator.cpp:14
This interface provides simple read-only access to a block of memory, and provides simple methods for...
line_iterator()=default
Default construct an "end" iterator.
This is an optimization pass for GlobalISel generic memory operations.
Implement std::hash so that hash_code can be used in STL containers.