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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>
#include <set>
#include <utility>
cmDefinitions::Def cmDefinitions::NoDef;
cmDefinitions::Def const& cmDefinitions::GetInternal(const std::string& key,
StackIter begin,
StackIter end, bool raise)
{
assert(begin != end);
MapType::iterator i = begin->Map.find(key);
if (i != begin->Map.end()) {
i->second.Used = true;
return i->second;
}
StackIter it = begin;
++it;
if (it == end) {
return cmDefinitions::NoDef;
}
Def const& def = cmDefinitions::GetInternal(key, it, end, raise);
if (!raise) {
return def;
}
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, false);
return def.Exists ? def.c_str() : CM_NULLPTR;
}
void cmDefinitions::Raise(const std::string& key, StackIter begin,
StackIter end)
{
cmDefinitions::GetInternal(key, begin, end, true);
}
bool cmDefinitions::HasKey(const std::string& key, StackIter begin,
StackIter end)
{
for (StackIter it = begin; it != end; ++it) {
MapType::const_iterator i = it->Map.find(key);
if (i != it->Map.end()) {
return true;
}
}
return false;
}
void cmDefinitions::Set(const std::string& key, const char* value)
{
Def def(value);
this->Map[key] = def;
}
std::vector<std::string> cmDefinitions::UnusedKeys() 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.Used) {
keys.push_back(mi->first);
}
}
return keys;
}
cmDefinitions cmDefinitions::MakeClosure(StackIter begin, StackIter end)
{
cmDefinitions closure;
std::set<std::string> undefined;
for (StackIter 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(StackIter begin,
StackIter end)
{
std::set<std::string> bound;
std::vector<std::string> defined;
for (StackIter it = begin; it != end; ++it) {
defined.reserve(defined.size() + it->Map.size());
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 (bound.insert(mi->first).second && mi->second.Exists) {
defined.push_back(mi->first);
}
}
}
return defined;
}
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