1 //===--- SymbolID.cpp --------------------------------------------*- 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 #include "SymbolID.h"
10 #include "support/Logger.h"
11 #include "llvm/Support/SHA1.h"
12 
13 namespace clang {
14 namespace clangd {
15 
SymbolID(llvm::StringRef USR)16 SymbolID::SymbolID(llvm::StringRef USR) {
17   auto Hash = llvm::SHA1::hash(llvm::arrayRefFromStringRef(USR));
18   static_assert(sizeof(Hash) >= RawSize, "RawSize larger than SHA1");
19   memcpy(HashValue.data(), Hash.data(), RawSize);
20 }
21 
raw() const22 llvm::StringRef SymbolID::raw() const {
23   return llvm::StringRef(reinterpret_cast<const char *>(HashValue.data()),
24                          RawSize);
25 }
26 
fromRaw(llvm::StringRef Raw)27 SymbolID SymbolID::fromRaw(llvm::StringRef Raw) {
28   SymbolID ID;
29   assert(Raw.size() == RawSize);
30   memcpy(ID.HashValue.data(), Raw.data(), RawSize);
31   return ID;
32 }
33 
str() const34 std::string SymbolID::str() const { return llvm::toHex(raw()); }
35 
fromStr(llvm::StringRef Str)36 llvm::Expected<SymbolID> SymbolID::fromStr(llvm::StringRef Str) {
37   if (Str.size() != RawSize * 2)
38     return error("Bad ID length");
39   for (char C : Str)
40     if (!llvm::isHexDigit(C))
41       return error("Bad hex ID");
42   return fromRaw(llvm::fromHex(Str));
43 }
44 
operator <<(llvm::raw_ostream & OS,const SymbolID & ID)45 llvm::raw_ostream &operator<<(llvm::raw_ostream &OS, const SymbolID &ID) {
46   return OS << llvm::toHex(ID.raw());
47 }
48 
49 } // namespace clangd
50 } // namespace clang
51