1 //===- ExportTrie.h ---------------------------------------------*- 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 LLD_MACHO_EXPORT_TRIE_H
10 #define LLD_MACHO_EXPORT_TRIE_H
11 
12 #include "llvm/ADT/ArrayRef.h"
13 #include "llvm/ADT/STLExtras.h"
14 
15 #include <vector>
16 
17 namespace lld {
18 namespace macho {
19 
20 struct TrieNode;
21 class Symbol;
22 
23 class TrieBuilder {
24 public:
25   void setImageBase(uint64_t addr) { imageBase = addr; }
26   void addSymbol(const Symbol &sym) { exported.push_back(&sym); }
27   // Returns the size in bytes of the serialized trie.
28   size_t build();
29   void writeTo(uint8_t *buf) const;
30 
31 private:
32   TrieNode *makeNode();
33   void sortAndBuild(llvm::MutableArrayRef<const Symbol *> vec, TrieNode *node,
34                     size_t lastPos, size_t pos);
35 
36   uint64_t imageBase = 0;
37   std::vector<const Symbol *> exported;
38   std::vector<TrieNode *> nodes;
39 };
40 
41 using TrieEntryCallback =
42     llvm::function_ref<void(const llvm::Twine & /*name*/, uint64_t /*flags*/)>;
43 
44 void parseTrie(const uint8_t *buf, size_t size, const TrieEntryCallback &);
45 
46 } // namespace macho
47 } // namespace lld
48 
49 #endif
50