intermediate changes

ref:cde9a383711a11544ce7e107a78147fb96cc4029

1 files changed, 107 insertions, 0 deletions

diff --git a/contrib/libs/llvm12/include/llvm/DebugInfo/CodeView/DebugStringTableSubsection.h b/contrib/libs/llvm12/include/llvm/DebugInfo/CodeView/DebugStringTableSubsection.h
new file mode 100644
index 0000000000..067149c40d
--- /dev/null
+++ b/contrib/libs/llvm12/include/llvm/DebugInfo/CodeView/DebugStringTableSubsection.h
@@ -0,0 +1,107 @@
+#pragma once
+
+#ifdef __GNUC__
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wunused-parameter"
+#endif
+
+//===- DebugStringTableSubsection.h - CodeView String Table -----*- C++ -*-===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_DEBUGINFO_CODEVIEW_DEBUGSTRINGTABLESUBSECTION_H
+#define LLVM_DEBUGINFO_CODEVIEW_DEBUGSTRINGTABLESUBSECTION_H
+
+#include "llvm/ADT/DenseMap.h"
+#include "llvm/ADT/StringMap.h"
+#include "llvm/ADT/StringRef.h"
+#include "llvm/DebugInfo/CodeView/CodeView.h"
+#include "llvm/DebugInfo/CodeView/DebugSubsection.h"
+#include "llvm/Support/BinaryStreamRef.h"
+#include "llvm/Support/Error.h"
+#include <cstdint>
+
+namespace llvm {
+
+class BinaryStreamReader;
+
+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);
+  Error initialize(BinaryStreamReader &Reader);
+
+  Expected<StringRef> getString(uint32_t Offset) const;
+
+  bool valid() const { return Stream.valid(); }
+
+  BinaryStreamRef getBuffer() const { return Stream; }
+
+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 getIdForString(StringRef S) const;
+
+  StringRef getStringForId(uint32_t Id) const;
+
+  uint32_t calculateSerializedSize() const override;
+  Error commit(BinaryStreamWriter &Writer) const override;
+
+  uint32_t size() const;
+
+  StringMap<uint32_t>::const_iterator begin() const {
+    return StringToId.begin();
+  }
+
+  StringMap<uint32_t>::const_iterator end() const { return StringToId.end(); }
+
+  std::vector<uint32_t> sortedIds() const;
+
+private:
+  DenseMap<uint32_t, StringRef> IdToString;
+  StringMap<uint32_t> StringToId;
+  uint32_t StringSize = 1;
+};
+
+} // end namespace codeview
+
+} // end namespace llvm
+
+#endif // LLVM_DEBUGINFO_CODEVIEW_DEBUGSTRINGTABLESUBSECTION_H
+
+#ifdef __GNUC__
+#pragma GCC diagnostic pop
+#endif