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/*============================================================================
CMake - Cross Platform Makefile Generator
Copyright 2000-2009 Kitware, Inc., Insight Software Consortium
Distributed under the OSI-approved BSD License (the "License");
see accompanying file Copyright.txt for details.
This software is distributed WITHOUT ANY WARRANTY; without even the
implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
See the License for more information.
============================================================================*/
#include "cmDefinitions.h"
//----------------------------------------------------------------------------
cmDefinitions::Def cmDefinitions::NoDef;
//----------------------------------------------------------------------------
cmDefinitions::cmDefinitions(cmDefinitions* parent)
: Up(parent)
{
}
//----------------------------------------------------------------------------
cmDefinitions::Def const&
cmDefinitions::GetInternal(const std::string& key)
{
MapType::const_iterator i = this->Map.find(key);
if(i != this->Map.end())
{
return i->second;
}
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;
}
//----------------------------------------------------------------------------
const char* cmDefinitions::Get(const std::string& key)
{
Def const& def = this->GetInternal(key);
return def.Exists? def.c_str() : 0;
}
//----------------------------------------------------------------------------
void cmDefinitions::Set(const std::string& key, const char* value)
{
Def def(value);
this->Map[key] = def;
}
void cmDefinitions::Erase(const std::string& key)
{
this->Map.erase(key);
}
//----------------------------------------------------------------------------
std::vector<std::string> cmDefinitions::LocalKeys() const
{
std::vector<std::string> keys;
keys.reserve(this->Map.size());
// Consider local definitions.
for(MapType::const_iterator mi = this->Map.begin();
mi != this->Map.end(); ++mi)
{
if (mi->second.Exists)
{
keys.push_back(mi->first);
}
}
return keys;
}
//----------------------------------------------------------------------------
cmDefinitions cmDefinitions::Closure() const
{
return cmDefinitions(ClosureTag(), this);
}
//----------------------------------------------------------------------------
cmDefinitions::cmDefinitions(ClosureTag const&, cmDefinitions const* root):
Up(0)
{
std::set<std::string> undefined;
this->ClosureImpl(undefined, root);
}
//----------------------------------------------------------------------------
void cmDefinitions::ClosureImpl(std::set<std::string>& 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<std::string> cmDefinitions::ClosureKeys() const
{
std::set<std::string> defined;
std::set<std::string> undefined;
this->ClosureKeys(defined, undefined);
return defined;
}
//----------------------------------------------------------------------------
void cmDefinitions::ClosureKeys(std::set<std::string>& defined,
std::set<std::string>& undefined) const
{
cmDefinitions const* up = this;
while (up)
{
// Consider local definitions.
for(MapType::const_iterator mi = up->Map.begin();
mi != up->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<std::string>& m = mi->second.Exists? defined : undefined;
m.insert(mi->first);
}
}
up = up->Up;
}
}
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