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1 //===-- StringPool.cpp - Interned string pool -----------------------------===//
2 //
3 //                     The LLVM Compiler Infrastructure
4 //
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9 //
10 // This file implements the StringPool class.
11 //
12 //===----------------------------------------------------------------------===//
13
14 #include "llvm/Support/StringPool.h"
15 #include "llvm/ADT/StringRef.h"
16
17 using namespace llvm;
18
19 StringPool::StringPool() {}
20
21 StringPool::~StringPool() {
22   assert(InternTable.empty() && "PooledStringPtr leaked!");
23 }
24
25 PooledStringPtr StringPool::intern(StringRef Key) {
26   table_t::iterator I = InternTable.find(Key);
27   if (I != InternTable.end())
28     return PooledStringPtr(&*I);
29   
30   entry_t *S = entry_t::Create(Key.begin(), Key.end());
31   S->getValue().Pool = this;
32   InternTable.insert(S);
33   
34   return PooledStringPtr(S);
35 }