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