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Gordon Henriksen985cb622007-12-08 17:07:47 +00001//===-- StringPool.cpp - Interned string pool -----------------------------===//
2//
3// The LLVM Compiler Infrastructure
4//
Chris Lattner4ee451d2007-12-29 20:36:04 +00005// This file is distributed under the University of Illinois Open Source
6// License. See LICENSE.TXT for details.
Gordon Henriksen985cb622007-12-08 17:07:47 +00007//
8//===----------------------------------------------------------------------===//
9//
10// This file implements the StringPool class.
11//
12//===----------------------------------------------------------------------===//
13
14#include "llvm/Support/StringPool.h"
Daniel Dunbar6316fbc2009-07-23 18:17:34 +000015#include "llvm/ADT/StringRef.h"
Gordon Henriksen985cb622007-12-08 17:07:47 +000016
17using namespace llvm;
18
19StringPool::StringPool() {}
20
21StringPool::~StringPool() {
22 assert(InternTable.empty() && "PooledStringPtr leaked!");
23}
24
Benjamin Kramer38e59892010-07-14 22:38:02 +000025PooledStringPtr StringPool::intern(StringRef Key) {
Daniel Dunbar6316fbc2009-07-23 18:17:34 +000026 table_t::iterator I = InternTable.find(Key);
Gordon Henriksen985cb622007-12-08 17:07:47 +000027 if (I != InternTable.end())
28 return PooledStringPtr(&*I);
29
Daniel Dunbar6316fbc2009-07-23 18:17:34 +000030 entry_t *S = entry_t::Create(Key.begin(), Key.end());
Gordon Henriksen985cb622007-12-08 17:07:47 +000031 S->getValue().Pool = this;
32 InternTable.insert(S);
33
34 return PooledStringPtr(S);
35}