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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"
#include <assert.h>
//----------------------------------------------------------------------------
cmDefinitions::Def cmDefinitions::NoDef;
//----------------------------------------------------------------------------
cmDefinitions::Def const& cmDefinitions::GetInternal(
const std::string& key, StackIter begin, StackIter end)
{
assert(begin != end);
MapType::const_iterator i = begin->Map.find(key);
if (i != begin->Map.end())
{
return i->second;
}
StackIter it = begin;
++it;
if (it == end)
{
return cmDefinitions::NoDef;
}
Def const& def = cmDefinitions::GetInternal(key, it, end);
return begin->Map.insert(MapType::value_type(key, def)).first->second;
}
//----------------------------------------------------------------------------
const char* cmDefinitions::Get(const std::string& key,
StackIter begin, StackIter end)
{
Def const& def = cmDefinitions::GetInternal(key, begin, end);
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::MakeClosure(StackConstIter begin,
StackConstIter end)
{
cmDefinitions closure;
std::set<std::string> undefined;
for (StackConstIter it = begin; it != end; ++it)
{
// Consider local definitions.
for(MapType::const_iterator mi = it->Map.begin();
mi != it->Map.end(); ++mi)
{
// Use this key if it is not already set or unset.
if(closure.Map.find(mi->first) == closure.Map.end() &&
undefined.find(mi->first) == undefined.end())
{
if(mi->second.Exists)
{
closure.Map.insert(*mi);
}
else
{
undefined.insert(mi->first);
}
}
}
}
return closure;
}
//----------------------------------------------------------------------------
std::vector<std::string>
cmDefinitions::ClosureKeys(std::set<std::string>& bound) const
{
std::vector<std::string> defined;
defined.reserve(this->Map.size());
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(bound.insert(mi->first).second && mi->second.Exists)
{
defined.push_back(mi->first);
}
}
return defined;
}
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