1 files changed, 75 insertions, 0 deletions
diff --git a/include/llvm/DebugInfo/CodeView/StringTable.h b/include/llvm/DebugInfo/CodeView/StringTable.h
new file mode 100644
index 000000000000..05dc02ee849f
--- /dev/null
+++ b/include/llvm/DebugInfo/CodeView/StringTable.h
@@ -0,0 +1,75 @@
+//===- StringTable.h - CodeView String Table Reader/Writer ------*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_DEBUGINFO_CODEVIEW_STRINGTABLE_H
+#define LLVM_DEBUGINFO_CODEVIEW_STRINGTABLE_H
+
+#include "llvm/ADT/StringMap.h"
+#include "llvm/ADT/StringRef.h"
+
+#include "llvm/Support/BinaryStreamRef.h"
+#include "llvm/Support/Error.h"
+
+#include <stdint.h>
+
+namespace llvm {
+
+class BinaryStreamReader;
+class BinaryStreamRef;
+class BinaryStreamWriter;
+
+namespace codeview {
+
+/// Represents a read-only view of a CodeView string table.  This is a very
+/// simple flat buffer consisting of null-terminated strings, where strings
+/// are retrieved by their offset in the buffer.  StringTableRef does not own
+/// the underlying storage for the buffer.
+class StringTableRef {
+public:
+  StringTableRef();
+
+  Error initialize(BinaryStreamRef Contents);
+
+  Expected<StringRef> getString(uint32_t Offset) const;
+
+  bool valid() const { return Stream.valid(); }
+
+private:
+  BinaryStreamRef Stream;
+};
+
+/// Represents a read-write view of a CodeView string table.  StringTable owns
+/// the underlying storage for the table, and is capable of serializing the
+/// string table into a format understood by StringTableRef.
+class StringTable {
+public:
+  // If string S does not exist in the string table, insert it.
+  // Returns the ID for S.
+  uint32_t insert(StringRef S);
+
+  // Return the ID for string S.  Assumes S exists in the table.
+  uint32_t getStringId(StringRef S) const;
+
+  uint32_t calculateSerializedSize() const;
+  Error commit(BinaryStreamWriter &Writer) const;
+
+  uint32_t size() const;
+
+  StringMap<uint32_t>::const_iterator begin() const { return Strings.begin(); }
+
+  StringMap<uint32_t>::const_iterator end() const { return Strings.end(); }
+
+private:
+  StringMap<uint32_t> Strings;
+  uint32_t StringSize = 1;
+};
+}
+}
+
+#endif