1 files changed, 43 insertions, 0 deletions
diff --git a/include/clang/Lex/HeaderMapTypes.h b/include/clang/Lex/HeaderMapTypes.h
new file mode 100644
index 0000000000..fbaf4baee4
--- /dev/null
+++ b/include/clang/Lex/HeaderMapTypes.h
@@ -0,0 +1,43 @@
+//===- HeaderMapTypes.h - Types for the header map format -------*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_CLANG_LEX_HEADERMAPTYPES_H
+#define LLVM_CLANG_LEX_HEADERMAPTYPES_H
+
+#include <cstdint>
+
+namespace clang {
+
+enum {
+  HMAP_HeaderMagicNumber = ('h' << 24) | ('m' << 16) | ('a' << 8) | 'p',
+  HMAP_HeaderVersion = 1,
+  HMAP_EmptyBucketKey = 0
+};
+
+struct HMapBucket {
+  uint32_t Key;    // Offset (into strings) of key.
+  uint32_t Prefix; // Offset (into strings) of value prefix.
+  uint32_t Suffix; // Offset (into strings) of value suffix.
+};
+
+struct HMapHeader {
+  uint32_t Magic;          // Magic word, also indicates byte order.
+  uint16_t Version;        // Version number -- currently 1.
+  uint16_t Reserved;       // Reserved for future use - zero for now.
+  uint32_t StringsOffset;  // Offset to start of string pool.
+  uint32_t NumEntries;     // Number of entries in the string table.
+  uint32_t NumBuckets;     // Number of buckets (always a power of 2).
+  uint32_t MaxValueLength; // Length of longest result path (excluding nul).
+  // An array of 'NumBuckets' HMapBucket objects follows this header.
+  // Strings follow the buckets, at StringsOffset.
+};
+
+} // end namespace clang.
+
+#endif