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| //===- HeaderMapTypes.h - Types for the header map format -------*- 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_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
|