blob: 4760348571a01f071de49fdd63dc5db1917467e7 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
|
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
* This file is part of the LibreOffice project.
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
*/
#include "svl/stringpool.hxx"
#include "unotools/charclass.hxx"
namespace svl {
StringPool::StringPool() : mpCharClass(NULL) {}
StringPool::StringPool( const CharClass* pCharClass ) : mpCharClass(pCharClass) {}
rtl_uString* StringPool::intern( const OUString& rStr )
{
InsertResultType aRes = findOrInsert(maStrPool, rStr);
if (aRes.first == maStrPool.end())
// Insertion failed.
return NULL;
rtl_uString* pOrig = aRes.first->pData;
if (!aRes.second)
// No new string has been inserted. Return the existing string in the pool.
return pOrig;
if (!mpCharClass)
return pOrig;
// This is a new string insertion. Establish mapping to upper-case variant.
OUString aUpper = mpCharClass->uppercase(rStr);
aRes = findOrInsert(maStrPoolUpper, aUpper);
if (aRes.first == maStrPoolUpper.end())
// Failed to insert or fetch upper-case variant. Should never happen.
return pOrig;
// Set mapping.
maToUpperMap.insert(StrIdMapType::value_type(pOrig, *aRes.first));
return pOrig;
}
StringPool::StrIdType StringPool::getIdentifier( const OUString& rStr ) const
{
StrHashType::const_iterator it = maStrPool.find(rStr);
return (it == maStrPool.end()) ? 0 : reinterpret_cast<StrIdType>(it->pData);
}
StringPool::StrIdType StringPool::getIdentifierIgnoreCase( const OUString& rStr ) const
{
StrHashType::const_iterator itOrig = maStrPool.find(rStr);
if (itOrig == maStrPool.end())
// Not in the pool.
return 0;
StrIdMapType::const_iterator itUpper = maToUpperMap.find(itOrig->pData);
if (itUpper == maToUpperMap.end())
// Passed string is not in the pool.
return 0;
const rtl_uString* pUpper = itUpper->second.pData;
return reinterpret_cast<StrIdType>(pUpper);
}
namespace {
inline sal_Int32 getRefCount( const rtl_uString* p )
{
return (p->refCount & 0x3FFFFFFF);
}
}
void StringPool::purge()
{
StrHashType aNewStrPool;
StrHashType::iterator it = maStrPool.begin(), itEnd = maStrPool.end();
for (; it != itEnd; ++it)
{
const rtl_uString* p = it->pData;
if (getRefCount(p) == 1)
{
// Remove it from the upper string map. This should unref the
// upper string linked to this original string.
maToUpperMap.erase(p);
}
else
// Still referenced outside the pool. Keep it.
aNewStrPool.insert(*it);
}
maStrPool.swap(aNewStrPool);
aNewStrPool.clear(); // for re-use.
// Purge the upper string pool as well.
it = maStrPoolUpper.begin();
itEnd = maStrPoolUpper.end();
for (; it != itEnd; ++it)
{
const rtl_uString* p = it->pData;
if (getRefCount(p) > 1)
aNewStrPool.insert(*it);
}
maStrPoolUpper.swap(aNewStrPool);
}
size_t StringPool::getCount() const
{
return maStrPool.size();
}
size_t StringPool::getCountIgnoreCase() const
{
return maStrPoolUpper.size();
}
StringPool::InsertResultType StringPool::findOrInsert( StrHashType& rPool, const OUString& rStr ) const
{
StrHashType::iterator it = rPool.find(rStr);
bool bInserted = false;
if (it == rPool.end())
{
// Not yet in the pool.
std::pair<StrHashType::iterator, bool> r = rPool.insert(rStr);
if (!r.second)
// Insertion failed.
return InsertResultType(rPool.end(), false);
it = r.first;
bInserted = true;
}
return InsertResultType(it, bInserted);
}
}
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
|