1 //===- ScriptParser.h -------------------------------------------*- C++ -*-===//
2 //
3 //                             The LLVM Linker
4 //
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9 
10 #ifndef LLD_ELF_SCRIPT_PARSER_H
11 #define LLD_ELF_SCRIPT_PARSER_H
12 
13 #include "lld/Core/LLVM.h"
14 #include "llvm/ADT/StringRef.h"
15 #include <utility>
16 #include <vector>
17 
18 namespace lld {
19 namespace elf {
20 
21 class ScriptParserBase {
22 public:
23   explicit ScriptParserBase(StringRef S) : Input(S), Tokens(tokenize(S)) {}
24   explicit ScriptParserBase(std::vector<StringRef> Tokens)
25       : Input(""), Tokens(std::move(Tokens)) {}
26 
27 protected:
28   void setError(const Twine &Msg);
29   static std::vector<StringRef> tokenize(StringRef S);
30   static StringRef skipSpace(StringRef S);
31   bool atEOF();
32   StringRef next();
33   StringRef peek();
34   bool skip(StringRef Tok);
35   void expect(StringRef Expect);
36 
37   size_t getPos();
38   void printErrorPos();
39 
40   std::vector<uint8_t> parseHex(StringRef S);
41 
42   StringRef Input;
43   std::vector<StringRef> Tokens;
44   size_t Pos = 0;
45   bool Error = false;
46 };
47 
48 } // namespace elf
49 } // namespace lld
50 
51 #endif
52