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1 //===- ScriptLexer.h --------------------------------------------*- C++ -*-===//
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2 //
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3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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4 // See https://llvm.org/LICENSE.txt for license information.
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5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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6 //
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7 //===----------------------------------------------------------------------===//
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8
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9 #ifndef LLD_ELF_SCRIPT_LEXER_H
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10 #define LLD_ELF_SCRIPT_LEXER_H
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11
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12 #include "lld/Common/LLVM.h"
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13 #include "llvm/ADT/StringRef.h"
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14 #include "llvm/Support/MemoryBuffer.h"
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15 #include <utility>
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16 #include <vector>
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17
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18 namespace lld {
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19 namespace elf {
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20
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21 class ScriptLexer {
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22 public:
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23 explicit ScriptLexer(MemoryBufferRef mb);
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24
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25 void setError(const Twine &msg);
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26 void tokenize(MemoryBufferRef mb);
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27 static StringRef skipSpace(StringRef s);
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28 bool atEOF();
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29 StringRef next();
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30 StringRef peek();
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31 StringRef peek2();
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32 void skip();
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33 bool consume(StringRef tok);
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34 void expect(StringRef expect);
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35 bool consumeLabel(StringRef tok);
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36 std::string getCurrentLocation();
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37
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38 std::vector<MemoryBufferRef> mbs;
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39 std::vector<StringRef> tokens;
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40 bool inExpr = false;
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41 size_t pos = 0;
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42
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43 private:
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44 void maybeSplitExpr();
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45 StringRef getLine();
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46 size_t getLineNumber();
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47 size_t getColumnNumber();
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48
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49 MemoryBufferRef getCurrentMB();
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50 };
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51
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52 } // namespace elf
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53 } // namespace lld
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54
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55 #endif
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