llvm-project/llvm/lib/Support/StringSaver.cpp

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834 B
C++

//===-- StringSaver.cpp ---------------------------------------------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#include "llvm/Support/StringSaver.h"
using namespace llvm;
StringRef StringSaver::save(StringRef S) {
char *P = Alloc.Allocate<char>(S.size() + 1);
memcpy(P, S.data(), S.size());
P[S.size()] = '\0';
return StringRef(P, S.size());
}
StringRef UniqueStringSaver::save(StringRef S) {
auto R = Unique.insert(S);
if (R.second) // cache miss, need to actually save the string
*R.first = Strings.save(S); // safe replacement with equal value
return *R.first;
}