1 files changed, 56 insertions, 0 deletions
diff --git a/ELF/ScriptLexer.h b/ELF/ScriptLexer.h
new file mode 100644
index 000000000000..64d6d9204864
--- /dev/null
+++ b/ELF/ScriptLexer.h
@@ -0,0 +1,56 @@
+//===- ScriptLexer.h --------------------------------------------*- C++ -*-===//
+//
+//                             The LLVM Linker
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLD_ELF_SCRIPT_LEXER_H
+#define LLD_ELF_SCRIPT_LEXER_H
+
+#include "lld/Core/LLVM.h"
+#include "llvm/ADT/StringRef.h"
+#include "llvm/Support/MemoryBuffer.h"
+#include <utility>
+#include <vector>
+
+namespace lld {
+namespace elf {
+
+class ScriptLexer {
+public:
+  explicit ScriptLexer(MemoryBufferRef MB);
+
+  void setError(const Twine &Msg);
+  void tokenize(MemoryBufferRef MB);
+  static StringRef skipSpace(StringRef S);
+  bool atEOF();
+  StringRef next();
+  StringRef peek();
+  void skip();
+  bool consume(StringRef Tok);
+  void expect(StringRef Expect);
+  bool consumeLabel(StringRef Tok);
+  std::string getCurrentLocation();
+
+  std::vector<MemoryBufferRef> MBs;
+  std::vector<StringRef> Tokens;
+  bool InExpr = false;
+  size_t Pos = 0;
+  bool Error = false;
+
+private:
+  void maybeSplitExpr();
+  StringRef getLine();
+  size_t getLineNumber();
+  size_t getColumnNumber();
+
+  MemoryBufferRef getCurrentMB();
+};
+
+} // namespace elf
+} // namespace lld
+
+#endif