1//===-- StringSaver.cpp ---------------------------------------------------===//
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 "llvm/Support/StringSaver.h"
10
11using namespace llvm;
12
13StringRef StringSaver::save(StringRef S) {
14  char *P = Alloc.Allocate<char>(S.size() + 1);
15  if (!S.empty())
16    memcpy(P, S.data(), S.size());
17  P[S.size()] = '\0';
18  return StringRef(P, S.size());
19}
20
21StringRef UniqueStringSaver::save(StringRef S) {
22  auto R = Unique.insert(S);
23  if (R.second)                 // cache miss, need to actually save the string
24    *R.first = Strings.save(S); // safe replacement with equal value
25  return *R.first;
26}
27