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
11#include "llvm/ADT/SmallString.h"
12
13using namespace llvm;
14
15StringRef StringSaver::save(StringRef S) {
16  char *P = Alloc.Allocate<char>(S.size() + 1);
17  if (!S.empty())
18    memcpy(P, S.data(), S.size());
19  P[S.size()] = '\0';
20  return StringRef(P, S.size());
21}
22
23StringRef StringSaver::save(const Twine &S) {
24  SmallString<128> Storage;
25  return save(S.toStringRef(Storage));
26}
27
28StringRef UniqueStringSaver::save(StringRef S) {
29  auto R = Unique.insert(S);
30  if (R.second)                 // cache miss, need to actually save the string
31    *R.first = Strings.save(S); // safe replacement with equal value
32  return *R.first;
33}
34
35StringRef UniqueStringSaver::save(const Twine &S) {
36  SmallString<128> Storage;
37  return save(S.toStringRef(Storage));
38}
39