1 | //===- LLLexer.h - Lexer for LLVM Assembly Files ----------------*- 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 class represents the Lexer for .ll files. |
10 | // |
11 | //===----------------------------------------------------------------------===// |
12 | |
13 | #ifndef LLVM_ASMPARSER_LLLEXER_H |
14 | #define LLVM_ASMPARSER_LLLEXER_H |
15 | |
16 | #include "LLToken.h" |
17 | #include "llvm/ADT/APFloat.h" |
18 | #include "llvm/ADT/APSInt.h" |
19 | #include "llvm/Support/SMLoc.h" |
20 | #include <string> |
21 | |
22 | namespace llvm { |
23 | class Type; |
24 | class SMDiagnostic; |
25 | class SourceMgr; |
26 | class LLVMContext; |
27 | |
28 | class LLLexer { |
29 | const char *CurPtr; |
30 | StringRef CurBuf; |
31 | SMDiagnostic &ErrorInfo; |
32 | SourceMgr &SM; |
33 | LLVMContext &Context; |
34 | |
35 | // Information about the current token. |
36 | const char *TokStart; |
37 | lltok::Kind CurKind; |
38 | std::string StrVal; |
39 | unsigned UIntVal = 0; |
40 | Type *TyVal = nullptr; |
41 | APFloat APFloatVal{0.0}; |
42 | APSInt APSIntVal{0}; |
43 | |
44 | // When false (default), an identifier ending in ':' is a label token. |
45 | // When true, the ':' is treated as a separate token. |
46 | bool IgnoreColonInIdentifiers = false; |
47 | |
48 | public: |
49 | explicit LLLexer(StringRef StartBuf, SourceMgr &SM, SMDiagnostic &, |
50 | LLVMContext &C); |
51 | |
52 | lltok::Kind Lex() { |
53 | return CurKind = LexToken(); |
54 | } |
55 | |
56 | typedef SMLoc LocTy; |
57 | LocTy getLoc() const { return SMLoc::getFromPointer(Ptr: TokStart); } |
58 | lltok::Kind getKind() const { return CurKind; } |
59 | const std::string &getStrVal() const { return StrVal; } |
60 | Type *getTyVal() const { return TyVal; } |
61 | unsigned getUIntVal() const { return UIntVal; } |
62 | const APSInt &getAPSIntVal() const { return APSIntVal; } |
63 | const APFloat &getAPFloatVal() const { return APFloatVal; } |
64 | |
65 | void setIgnoreColonInIdentifiers(bool val) { |
66 | IgnoreColonInIdentifiers = val; |
67 | } |
68 | |
69 | bool Error(LocTy ErrorLoc, const Twine &Msg) const; |
70 | bool Error(const Twine &Msg) const { return Error(ErrorLoc: getLoc(), Msg); } |
71 | |
72 | void Warning(LocTy WarningLoc, const Twine &Msg) const; |
73 | void Warning(const Twine &Msg) const { return Warning(WarningLoc: getLoc(), Msg); } |
74 | |
75 | private: |
76 | lltok::Kind LexToken(); |
77 | |
78 | int getNextChar(); |
79 | void (); |
80 | lltok::Kind ReadString(lltok::Kind kind); |
81 | bool ReadVarName(); |
82 | |
83 | lltok::Kind LexIdentifier(); |
84 | lltok::Kind LexDigitOrNegative(); |
85 | lltok::Kind LexPositive(); |
86 | lltok::Kind LexAt(); |
87 | lltok::Kind LexDollar(); |
88 | lltok::Kind LexExclaim(); |
89 | lltok::Kind LexPercent(); |
90 | lltok::Kind LexUIntID(lltok::Kind Token); |
91 | lltok::Kind LexVar(lltok::Kind Var, lltok::Kind VarID); |
92 | lltok::Kind LexQuote(); |
93 | lltok::Kind Lex0x(); |
94 | lltok::Kind LexHash(); |
95 | lltok::Kind LexCaret(); |
96 | |
97 | uint64_t atoull(const char *Buffer, const char *End); |
98 | uint64_t HexIntToVal(const char *Buffer, const char *End); |
99 | void HexToIntPair(const char *Buffer, const char *End, uint64_t Pair[2]); |
100 | void FP80HexToIntPair(const char *Buffer, const char *End, uint64_t Pair[2]); |
101 | }; |
102 | } // end namespace llvm |
103 | |
104 | #endif |
105 | |