1 files changed, 86 insertions, 0 deletions
diff --git a/include/llvm/DebugInfo/CodeView/DebugStringTableSubsection.h b/include/llvm/DebugInfo/CodeView/DebugStringTableSubsection.h
new file mode 100644
index 000000000000..fbe39cb16f09
--- /dev/null
+++ b/include/llvm/DebugInfo/CodeView/DebugStringTableSubsection.h
@@ -0,0 +1,86 @@
+//===- DebugStringTableSubsection.h - CodeView String Table -----*- 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_DEBUGSTRINGTABLESUBSECTION_H
+#define LLVM_DEBUGINFO_CODEVIEW_DEBUGSTRINGTABLESUBSECTION_H
+
+#include "llvm/ADT/StringMap.h"
+#include "llvm/ADT/StringRef.h"
+#include "llvm/DebugInfo/CodeView/DebugSubsection.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.  DebugStringTableSubsectionRef
+/// does not own the underlying storage for the buffer.
+class DebugStringTableSubsectionRef : public DebugSubsectionRef {
+public:
+  DebugStringTableSubsectionRef();
+
+  static bool classof(const DebugSubsectionRef *S) {
+    return S->kind() == DebugSubsectionKind::StringTable;
+  }
+
+  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.
+/// DebugStringTableSubsection owns the underlying storage for the table, and is
+/// capable of serializing the string table into a format understood by
+/// DebugStringTableSubsectionRef.
+class DebugStringTableSubsection : public DebugSubsection {
+public:
+  DebugStringTableSubsection();
+
+  static bool classof(const DebugSubsection *S) {
+    return S->kind() == DebugSubsectionKind::StringTable;
+  }
+
+  // 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 override;
+  Error commit(BinaryStreamWriter &Writer) const override;
+
+  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