| 1 | //===- HeaderMapTypes.h - Types for the header map format -------*- C++ -*-===// |
|---|---|
| 2 | // |
| 3 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| 4 | // See https://llvm.org/LICENSE.txt for license information. |
| 5 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| 6 | // |
| 7 | //===----------------------------------------------------------------------===// |
| 8 | |
| 9 | #ifndef LLVM_CLANG_LEX_HEADERMAPTYPES_H |
| 10 | #define LLVM_CLANG_LEX_HEADERMAPTYPES_H |
| 11 | |
| 12 | #include <cstdint> |
| 13 | |
| 14 | namespace clang { |
| 15 | |
| 16 | enum { |
| 17 | HMAP_HeaderMagicNumber = ('h' << 24) | ('m' << 16) | ('a' << 8) | 'p', |
| 18 | HMAP_HeaderVersion = 1, |
| 19 | HMAP_EmptyBucketKey = 0 |
| 20 | }; |
| 21 | |
| 22 | struct HMapBucket { |
| 23 | uint32_t Key; // Offset (into strings) of key. |
| 24 | uint32_t Prefix; // Offset (into strings) of value prefix. |
| 25 | uint32_t Suffix; // Offset (into strings) of value suffix. |
| 26 | }; |
| 27 | |
| 28 | struct HMapHeader { |
| 29 | uint32_t Magic; // Magic word, also indicates byte order. |
| 30 | uint16_t Version; // Version number -- currently 1. |
| 31 | uint16_t Reserved; // Reserved for future use - zero for now. |
| 32 | uint32_t StringsOffset; // Offset to start of string pool. |
| 33 | uint32_t NumEntries; // Number of entries in the string table. |
| 34 | uint32_t NumBuckets; // Number of buckets (always a power of 2). |
| 35 | uint32_t MaxValueLength; // Length of longest result path (excluding nul). |
| 36 | // An array of 'NumBuckets' HMapBucket objects follows this header. |
| 37 | // Strings follow the buckets, at StringsOffset. |
| 38 | }; |
| 39 | |
| 40 | } // end namespace clang. |
| 41 | |
| 42 | #endif |
| 43 |