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
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
|
/*=========================================================================
Program: CMake - Cross-Platform Makefile Generator
Module: $RCSfile$
Language: C++
Date: $Date$
Version: $Revision$
Copyright (c) 2002 Kitware, Inc., Insight Consortium. All rights reserved.
See Copyright.txt or http://www.cmake.org/HTML/Copyright.html for details.
This software is distributed WITHOUT ANY WARRANTY; without even
the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
PURPOSE. See the above copyright notices for more information.
=========================================================================*/
#include "cmDefinitions.h"
//----------------------------------------------------------------------------
cmDefinitions::Def cmDefinitions::NoDef;
//----------------------------------------------------------------------------
cmDefinitions::cmDefinitions(cmDefinitions* parent): Up(parent)
{
}
//----------------------------------------------------------------------------
void cmDefinitions::Reset(cmDefinitions* parent)
{
this->Up = parent;
this->Map.clear();
}
//----------------------------------------------------------------------------
cmDefinitions::Def const&
cmDefinitions::GetInternal(const char* key)
{
MapType::const_iterator i = this->Map.find(key);
if(i != this->Map.end())
{
return i->second;
}
else if(cmDefinitions* up = this->Up)
{
// Query the parent scope and store the result locally.
Def def = up->GetInternal(key);
return this->Map.insert(MapType::value_type(key, def)).first->second;
}
return this->NoDef;
}
//----------------------------------------------------------------------------
cmDefinitions::Def const&
cmDefinitions::SetInternal(const char* key, Def const& def)
{
if(this->Up || def.Exists)
{
// In lower scopes we store keys, defined or not.
MapType::iterator i = this->Map.find(key);
if(i == this->Map.end())
{
i = this->Map.insert(MapType::value_type(key, def)).first;
}
else
{
i->second = def;
}
return i->second;
}
else
{
// In the top-most scope we need not store undefined keys.
this->Map.erase(key);
return this->NoDef;
}
}
//----------------------------------------------------------------------------
const char* cmDefinitions::Get(const char* key)
{
Def const& def = this->GetInternal(key);
return def.Exists? def.c_str() : 0;
}
//----------------------------------------------------------------------------
const char* cmDefinitions::Set(const char* key, const char* value)
{
Def const& def = this->SetInternal(key, Def(value));
return def.Exists? def.c_str() : 0;
}
//----------------------------------------------------------------------------
cmDefinitions cmDefinitions::Closure() const
{
return cmDefinitions(ClosureTag(), this);
}
//----------------------------------------------------------------------------
cmDefinitions::cmDefinitions(ClosureTag const&, cmDefinitions const* root):
Up(0)
{
std::set<cmStdString> undefined;
this->ClosureImpl(undefined, root);
}
//----------------------------------------------------------------------------
void cmDefinitions::ClosureImpl(std::set<cmStdString>& undefined,
cmDefinitions const* defs)
{
// Consider local definitions.
for(MapType::const_iterator mi = defs->Map.begin();
mi != defs->Map.end(); ++mi)
{
// Use this key if it is not already set or unset.
if(this->Map.find(mi->first) == this->Map.end() &&
undefined.find(mi->first) == undefined.end())
{
if(mi->second.Exists)
{
this->Map.insert(*mi);
}
else
{
undefined.insert(mi->first);
}
}
}
// Traverse parents.
if(cmDefinitions const* up = defs->Up)
{
this->ClosureImpl(undefined, up);
}
}
//----------------------------------------------------------------------------
std::set<cmStdString> cmDefinitions::ClosureKeys() const
{
std::set<cmStdString> defined;
std::set<cmStdString> undefined;
this->ClosureKeys(defined, undefined);
return defined;
}
//----------------------------------------------------------------------------
void cmDefinitions::ClosureKeys(std::set<cmStdString>& defined,
std::set<cmStdString>& undefined) const
{
// Consider local definitions.
for(MapType::const_iterator mi = this->Map.begin();
mi != this->Map.end(); ++mi)
{
// Use this key if it is not already set or unset.
if(defined.find(mi->first) == defined.end() &&
undefined.find(mi->first) == undefined.end())
{
std::set<cmStdString>& m = mi->second.Exists? defined : undefined;
m.insert(mi->first);
}
}
// Traverse parents.
if(cmDefinitions const* up = this->Up)
{
up->ClosureKeys(defined, undefined);
}
}
|
