Directory

// Submitted by EthereumHistory (ethereumhistory.com)
// DigixDAO `Directory` typed-collection storage library.
// Deployed by Anthony Eufemio (DigixDAO CTO, github.com/tymat), Nov 2015 — one of 9 byte-identical clones.
// Source: github.com/DigixGlobal/ethereum-ruby  contracts/Directory.sol (verbatim).
// Compiler: native solc v0.1.7 @commit c806b9bc, flags --optimize --optimize-runs 1.
// Verification: exact_bytecode_match (runtime 820 bytes, incl. native version stamp 650107c806b9bc50).
// Proof: https://github.com/cartoonitunes/awesome-ethereum-proofs/tree/main/proofs/digixdao-directory-config

library Directory {

  struct AddressBytesMap { mapping(address => bytes32) bytesentries; }

  struct AddressAddressMap { mapping(address => address) addrentries; }

  struct AddressBoolMap { mapping(address => bool) boolentries; }

  function insert(AddressBytesMap storage self, address key, bytes32 val) returns (bool) {
    if (self.bytesentries[key] == val) return false;
    self.bytesentries[key] = val;
    return true;
  }

  function insert(AddressBoolMap storage self, address key) returns (bool) {
    if (self.boolentries[key]) return false; 
    self.boolentries[key] = true;
    return true;
  }

  function insert(AddressAddressMap storage self, address key, address val) returns (bool) {
    if (self.addrentries[key] == val) return false;
    self.addrentries[key] = val;
    return true;
  }

  function remove(AddressBytesMap storage self, address key) returns (bool) {
    if (self.bytesentries[key] == 0x0) return false;
    self.bytesentries[key] = 0x0;
    return true;
  }

  function remove(AddressBoolMap storage self, address key) returns (bool) {
    if (!self.boolentries[key]) return false;
    self.boolentries[key] = false;
    return true;
  }

  function remove(AddressAddressMap storage self, address key) returns (bool) {
    if (self.addrentries[key] == 0x0000000000000000000000000000000000000000) return false;
    self.addrentries[key] = 0x0000000000000000000000000000000000000000;
    return true;
  }
  
  function contains(AddressBytesMap storage self, address key) returns (bool) {
    if (self.bytesentries[key] != 0x0) return true;
  }

  function contains(AddressBoolMap storage self, address key) returns (bool) {
    return self.boolentries[key];
  }

  function contains(AddressAddressMap storage self, address key) returns (bool) {
    if (self.addrentries[key] != 0x0000000000000000000000000000000000000000) return true;
  }
  
  function containsAndMatches(AddressBytesMap storage self, address key, bytes32 val) returns (bool) {
    return (self.bytesentries[key] == val);
  }

  function containsAndMatches(AddressAddressMap storage self, address key, address val) returns (bool) {
    return (self.addrentries[key] == val);
  }

}