/*============================================================================ 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) { } //---------------------------------------------------------------------------- void cmDefinitions::Reset(cmDefinitions* parent) { this->Up = parent; this->Map.clear(); } //---------------------------------------------------------------------------- cmDefinitions::Def const& cmDefinitions::GetInternal(const std::string& key) const { 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. return up->GetInternal(key); } return this->NoDef; } //---------------------------------------------------------------------------- cmDefinitions::Def const& cmDefinitions::SetInternal(const std::string& key, Def const& def) { if(this->Up || def.Exists) { // In lower scopes we store keys, defined or not. return (this->Map[key] = def); } else { // In the top-most scope we need not store undefined keys. this->Map.erase(key); return this->NoDef; } } //---------------------------------------------------------------------------- const char* cmDefinitions::Get(const std::string& key) const { Def const& def = this->GetInternal(key); return def.Exists? def.c_str() : 0; } //---------------------------------------------------------------------------- void cmDefinitions::Pull(const std::string& key) { if (this->Up) { Def const& def = this->Up->GetInternal(key); if (def.Exists) { this->SetInternal(key, def); } } } //---------------------------------------------------------------------------- const char* cmDefinitions::Set(const std::string& key, const char* value) { Def const& def = this->SetInternal(key, Def(value)); return def.Exists? def.c_str() : 0; } //---------------------------------------------------------------------------- std::set<std::string> cmDefinitions::LocalKeys() const { std::set<std::string> keys; // Consider local definitions. for(MapType::const_iterator mi = this->Map.begin(); mi != this->Map.end(); ++mi) { if (mi->second.Exists) { keys.insert(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 { // 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<std::string>& m = mi->second.Exists? defined : undefined; m.insert(mi->first); } } // Traverse parents. if(cmDefinitions const* up = this->Up) { up->ClosureKeys(defined, undefined); } }