Use nullptr in C++ code (solves #4348) (#5043)

* chore(CppParser): 0, NULL --> nullptr

* chore(Crypto): 0, NULL --> nullptr

* chore(DNSSD): 0, NULL --> nullptr

* chore(Encodings): 0, NULL --> nullptr

* chore(CppUnit): Correct indentation.

* chore(Foundation): 0, NULL --> nullptr

* chore(CMake): Always warn about wrong nullptr usage when compiling with GCC or CLang

* chore(Net): 0, NULL --> nullptr

* chore(Foundation): 0, NULL --> nullptr

* chore(Data): 0, NULL --> nullptr

* chore(macOS): 0, NULL --> nullptr

* chore(XML): 0, NULL --> nullptr

* chore(Zip): 0, NULL --> nullptr

* chore(Util): 0, NULL --> nullptr

* chore(Net/NetSSL): 0, NULL --> nullptr

* chore(Bonjour): 0, NULL --> nullptr

* chore(MongoDB, Redis): 0, NULL --> nullptr

* chore(Poco): 0, NULL --> nullptr

* chore(Win32): 0, NULL --> nullptr

* chore(CMake): Only warn about nullptr when verbose warnings are enabled.

* Potential fix for code scanning alert no. 1634: Guarded Free

Co-authored-by: Copilot Autofix powered by AI <62310815+github-advanced-security[bot]@users.noreply.github.com>

* chore(Net): Fix warning reported by gitlab.

* chore(gitlab CI): attempt to clean to gain disk space on the runner.

* chore(gitlab CI): Run build with  --parallel 4, correct docker cleanup.

---------

Co-authored-by: Aleksandar Fabijanic <aleks-f@users.noreply.github.com>
Co-authored-by: Copilot Autofix powered by AI <62310815+github-advanced-security[bot]@users.noreply.github.com>

.github/workflows/ci.yml

@@ -35,7 +35,7 @@ jobs:
           export CXX=clang++-20
           cmake -S . -B build -G Ninja -DPOCO_BUILD_MODULES=ON
       - name: Build
-        run: cmake --build build
+        run: cmake --build build --parallel 4
 
   android-arm64-v8a-ndk-latest-cmake:
     runs-on: ubuntu-22.04
@@ -82,7 +82,7 @@ jobs:
       - run: >-
           cmake -S. -Bcmake-build -GNinja -DENABLE_TESTS=ON -DPOCO_MINIMAL_BUILD=TRUE
           -DENABLE_NET=ON -DENABLE_JSON=ON -DENABLE_XML=ON -DENABLE_ZIP=ON
-      - run: cmake --build cmake-build --target all
+      - run: cmake --build cmake-build --target all --parallel 4
 
   linux-gcc-cmake-cross-armhf:
     # Converted from a make job, what is essentially different from the above?
@@ -100,14 +100,14 @@ jobs:
       - run: >-
           cmake -S. -Bcmake-build -GNinja -DENABLE_TESTS=ON -DPOCO_MINIMAL_BUILD=TRUE
           -DENABLE_NET=ON -DENABLE_JSON=ON -DENABLE_XML=ON -DENABLE_ZIP=ON
-      - run: cmake --build cmake-build --target all
+      - run: cmake --build cmake-build --target all  --parallel 4
 
   linux-gcc-cmake:
     runs-on: ubuntu-24.04
     steps:
       - uses: actions/checkout@v4
       - run: sudo apt -y update && sudo apt -y install cmake ninja-build libssl-dev unixodbc-dev libmysqlclient-dev redis-server
-      - run: cmake -S. -Bcmake-build -GNinja -DENABLE_PDF=OFF -DENABLE_TESTS=ON && cmake --build cmake-build --target all
+      - run: cmake -S. -Bcmake-build -GNinja -DENABLE_PDF=OFF -DENABLE_TESTS=ON && cmake --build cmake-build --target all  --parallel 4
       - uses: ./.github/actions/retry-action
         with:
           timeout_minutes: 90
@@ -126,7 +126,7 @@ jobs:
       - run: >-
           cmake -S. -Bcmake-build -GNinja -DCMAKE_CXX_VISIBILITY_PRESET=hidden
           -DENABLE_PDF=ON -DENABLE_TESTS=ON -DENABLE_DATA_MYSQL=ON -DENABLE_DATA_ODBC=ON
-      - run: cmake --build cmake-build --target all
+      - run: cmake --build cmake-build --target all --parallel 4
       - uses: ./.github/actions/retry-action
         with:
           timeout_minutes: 90
@@ -147,7 +147,7 @@ jobs:
       - run: >-
           cmake -S. -Bcmake-build -GNinja -DENABLE_TESTS=ON -DPOCO_UNBUNDLED=ON
           -DENABLE_DATA_MYSQL=ON -DENABLE_PDF=ON -DENABLE_XML=ON
-      - run: cmake --build cmake-build --target all
+      - run: cmake --build cmake-build --target all --parallel 4
       - uses: ./.github/actions/retry-action
         with:
           timeout_minutes: 90
@@ -168,7 +168,7 @@ jobs:
       - run: >-
           cmake -S. -Bcmake-build -GNinja -DENABLE_TESTS=ON -DPOCO_UNBUNDLED=ON -DBUILD_SHARED_LIBS=OFF
           -DENABLE_DATA_MYSQL=ON -DENABLE_PDF=ON -DENABLE_XML=ON
-      - run: cmake --build cmake-build --target all
+      - run: cmake --build cmake-build --target all --parallel 4
       - uses: ./.github/actions/retry-action
         with:
           timeout_minutes: 90
@@ -186,7 +186,7 @@ jobs:
       - run: sudo apt -y update && sudo apt -y install libssl-dev
       - run: >-
           cmake -S. -Bcmake-build -GNinja -DPOCO_MINIMAL_BUILD=ON -DENABLE_TRACE=ON -DENABLE_TESTS=ON
-      - run: cmake --build cmake-build --target all
+      - run: cmake --build cmake-build --target all --parallel 4
       - uses: ./.github/actions/retry-action
         with:
           timeout_minutes: 90
@@ -219,7 +219,7 @@ jobs:
           -DENABLE_PAGECOMPILER=ON -DENABLE_POCODOC=ON -DENABLE_PAGECOMPILER_FILE2PAGE=ON
           -DENABLE_REDIS=OFF -DENABLE_MONGODB=OFF
           -DENABLE_DATA=OFF -DENABLE_DATA_ODBC=OFF -DENABLE_DATA_POSTGRESQL=OFF -DENABLE_DATA_MYSQL=OFF
-      - run: cmake --build cmake-build --target all
+      - run: cmake --build cmake-build --target all --parallel 4
       - uses: ./.github/actions/retry-action
         with:
           timeout_minutes: 90
@@ -252,7 +252,7 @@ jobs:
           -DENABLE_PAGECOMPILER=ON -DENABLE_POCODOC=ON -DENABLE_PAGECOMPILER_FILE2PAGE=ON
           -DENABLE_REDIS=OFF -DENABLE_MONGODB=OFF
           -DENABLE_DATA=OFF -DENABLE_DATA_ODBC=OFF -DENABLE_DATA_POSTGRESQL=OFF -DENABLE_DATA_MYSQL=OFF
-      - run: cmake --build cmake-build --target all
+      - run: cmake --build cmake-build --target all --parallel 4
       - uses: ./.github/actions/retry-action
         with:
           timeout_minutes: 90
@@ -279,7 +279,7 @@ jobs:
           -DENABLE_PAGECOMPILER=ON -DENABLE_POCODOC=ON -DENABLE_PAGECOMPILER_FILE2PAGE=ON
           -DENABLE_REDIS=OFF -DENABLE_MONGODB=OFF
           -DENABLE_DATA=OFF -DENABLE_DATA_ODBC=OFF -DENABLE_DATA_POSTGRESQL=OFF -DENABLE_DATA_MYSQL=OFF
-      - run: cmake --build cmake-build --target all
+      - run: cmake --build cmake-build --target all --parallel 4
       - uses: ./.github/actions/retry-action
         with:
           timeout_minutes: 90
@@ -314,7 +314,7 @@ jobs:
           -DENABLE_PAGECOMPILER=ON -DENABLE_POCODOC=ON -DENABLE_PAGECOMPILER_FILE2PAGE=ON
           -DENABLE_REDIS=OFF -DENABLE_MONGODB=OFF
           -DENABLE_DATA=OFF -DENABLE_DATA_ODBC=OFF -DENABLE_DATA_POSTGRESQL=OFF -DENABLE_DATA_MYSQL=OFF
-      - run: cmake --build cmake-build --target all
+      - run: cmake --build cmake-build --target all --parallel 4
       - uses: ./.github/actions/retry-action
         with:
           timeout_minutes: 90
@@ -346,7 +346,7 @@ jobs:
       - run: >-
           emcmake cmake -H. -B cmake-build -DCMAKE_POLICY_VERSION_MINIMUM=3.5 -DENABLE_ACTIVERECORD_COMPILER=OFF
           -DENABLE_PAGECOMPILER=OFF -DENABLE_PAGECOMPILER_FILE2PAGE=off
-      - run: emmake cmake --build cmake-build --target all -j6
+      - run: emmake cmake --build cmake-build --target all --parallel 4
   # TODO: How to run unit tests in emscripten?
   #      - uses: ./.github/actions/retry-action
   #        with:
@@ -696,7 +696,7 @@ jobs:
       - run: sudo apt -y update && sudo apt -y install libssl-dev unixodbc-dev libmysqlclient-dev mysql-client
       - run: >-
           cmake -S. -Bcmake-build -GNinja -DPOCO_MINIMAL_BUILD=ON -DENABLE_DATA_MYSQL=ON -DENABLE_TESTS=ON
-      - run: cmake --build cmake-build --target all
+      - run: cmake --build cmake-build --target all --parallel 4
       - uses: ./.github/actions/retry-action
         with:
           timeout_minutes: 90
@@ -723,7 +723,7 @@ jobs:
       - run: sudo apt -y update && sudo apt -y install libssl-dev unixodbc-dev libmysqlclient-dev odbc-postgresql
       - run: >-
           cmake -S. -Bcmake-build -GNinja -DPOCO_MINIMAL_BUILD=ON -DENABLE_DATA_POSTGRESQL=ON -DENABLE_TESTS=ON
-      - run: cmake --build cmake-build --target all
+      - run: cmake --build cmake-build --target all --parallel 4
       - uses: ./.github/actions/retry-action
         with:
           timeout_minutes: 90
@@ -746,7 +746,7 @@ jobs:
           sudo apt-get -y install redis
       - run: >-
           cmake -S. -Bcmake-build -GNinja -DPOCO_MINIMAL_BUILD=ON -DENABLE_REDIS=ON -DENABLE_TESTS=ON
-      - run: cmake --build cmake-build --target all
+      - run: cmake --build cmake-build --target all --parallel 4
       - uses: ./.github/actions/retry-action
         with:
           timeout_minutes: 90
@@ -765,7 +765,7 @@ jobs:
       - run: sudo apt -y update && sudo apt -y install libssl-dev
       - run: >-
           cmake -S. -Bcmake-build -GNinja -DPOCO_MINIMAL_BUILD=ON -DENABLE_MONGODB=ON -DENABLE_TESTS=ON
-      - run: cmake --build cmake-build --target all
+      - run: cmake --build cmake-build --target all --parallel 4
 
       - uses: ./.github/actions/retry-action
         with:
@@ -817,6 +817,17 @@ jobs:
       #     wget https://dev.mysql.com/get/Downloads/Connector-ODBC/8.2/mysql-connector-odbc_8.2.0-1ubuntu22.04_amd64.deb
       #     wget https://dev.mysql.com/get/Downloads/MySQL-8.2/mysql-community-client-plugins_8.2.0-1ubuntu22.04_amd64.deb
       #     sudo dpkg -i mysql-community-client-plugins_8.2.0-1ubuntu22.04_amd64.deb mysql-connector-odbc_8.2.0-1ubuntu22.04_amd64.deb
+
+      - name: Free disk space
+        run: |
+          sudo df
+          sudo apt autopurge
+          sudo apt clean
+          sudo du -s /usr/local/lib/*
+          sudo du -s /opt/*
+          sudo rm -rf /usr/share/dotnet
+          sudo docker system prune -a --force
+          sudo df
       - name: Setup Oracle ODBC connector
         run: |
           wget https://www.devart.com/odbc/oracle/devartodbcoracle_amd64.deb
@@ -833,7 +844,7 @@ jobs:
       - run: ls -l /etc/apt/sources.list.d/
       - run: >-
           cmake -S. -Bcmake-build -GNinja -DPOCO_MINIMAL_BUILD=ON -DENABLE_DATA_ODBC=ON -DENABLE_TESTS=ON
-      - run: cmake --build cmake-build --target all
+      - run: cmake --build cmake-build --target all --parallel 4
       - uses: ./.github/actions/retry-action
         with:
           timeout_minutes: 90
@@ -853,7 +864,7 @@ jobs:
       - run: >-
           cmake -S. -Bcmake-build -GNinja -DPOCO_MINIMAL_BUILD=ON -DENABLE_DATA_SQLITE=ON
           -DPOCO_DATA_NO_SQL_PARSER=ON -DENABLE_TESTS=ON
-      - run: cmake --build cmake-build --target all
+      - run: cmake --build cmake-build --target all --parallel 4
 
       - uses: ./.github/actions/retry-action
         with:

ApacheConnector/src/ApacheConnector.cpp

@@ -164,7 +164,7 @@ void ApacheConnector::log(const char* file, int line, int level, int status, con
 	// ap_log_error() has undergone significant changes in Apache 2.4.
 	// Validate Apache version for using a proper ap_log_error() version.
 #if AP_SERVER_MAJORVERSION_NUMBER == 2 && AP_SERVER_MINORVERSION_NUMBER < 4
-		ap_log_error(file, line, level, 0, NULL, "%s", text);
+		ap_log_error(file, line, level, 0, nullptr, "%s", text);
 #else
 	ap_log_error(file, line, level, 0, 0, 0, text);
 #endif
@@ -245,7 +245,7 @@ extern "C" int ApacheConnector_handler(request_rec *r)
 
 extern "C" void ApacheConnector_register_hooks(apr_pool_t *p)
 {
-	ap_hook_handler(ApacheConnector_handler, NULL, NULL, APR_HOOK_MIDDLE);
+	ap_hook_handler(ApacheConnector_handler, nullptr, nullptr, APR_HOOK_MIDDLE);
 }
 
 
@@ -290,26 +290,26 @@ extern "C" const command_rec ApacheConnector_cmds[] =
 	AP_INIT_RAW_ARGS(
 		"AddPocoRequestHandler",
 		reinterpret_cast<cmd_func>(ApacheConnector_uris),
-		NULL,
+		nullptr,
 		RSRC_CONF,
 		"POCO RequestHandlerFactory class name followed by shared library path followed by a list of ' ' separated URIs that must be handled by this module."),
 	AP_INIT_RAW_ARGS(
 		"AddPocoConfig",
 		reinterpret_cast<cmd_func>(ApacheConnector_config),
-		NULL,
+		nullptr,
 		RSRC_CONF,
 		"Path of the POCO configuration file."),
-    { NULL }
+	{ nullptr }
 };
 
 
 module AP_MODULE_DECLARE_DATA poco_module =
 {
 	STANDARD20_MODULE_STUFF,
-	NULL,
-	NULL,
-	NULL,
-	NULL,
+	nullptr,
+	nullptr,
+	nullptr,
+	nullptr,
 	ApacheConnector_cmds,
 	ApacheConnector_register_hooks
 };

CppParser/include/Poco/CppParser/NameSpace.h

@@ -41,7 +41,7 @@ public:
 	NameSpace();
 		/// Creates the NameSpace.
 
-	NameSpace(const std::string& name, NameSpace* pNameSpace = 0);
+	NameSpace(const std::string& name, NameSpace* pNameSpace = nullptr);
 		/// Creates the NameSpace.
 
 	~NameSpace();

CppParser/include/Poco/CppParser/Symbol.h

@@ -62,7 +62,7 @@ public:
 		/// Creates the Symbol and assigns the symbol
 		/// a unique ID.
 
-	Symbol(const std::string& name, NameSpace* pNameSpace = 0);
+	Symbol(const std::string& name, NameSpace* pNameSpace = nullptr);
 		/// Creates the Symbol and assigns the symbol
 		/// a unique ID.
 

CppParser/src/CppToken.cpp

@@ -670,13 +670,13 @@ void NumberLiteralToken::finishSuffix(std::istream& istr, int next)
 
 int NumberLiteralToken::asInteger() const
 {
-	return static_cast<int>(std::strtol(_value.c_str(), 0, 0));
+	return static_cast<int>(std::strtol(_value.c_str(), nullptr, 0));
 }
 
 
 double NumberLiteralToken::asFloat() const
 {
-	return std::strtod(_value.c_str(), 0);
+	return std::strtod(_value.c_str(), nullptr);
 }
 
 

CppParser/src/Function.cpp

@@ -213,7 +213,7 @@ bool Function::isVirtual() const
 		Struct* pClass = dynamic_cast<Struct*>(nameSpace());
 		return pClass && pClass->hasVirtualDestructor();
 	}
-	else return getOverridden() != 0;
+	else return getOverridden() != nullptr;
 }
 
 
@@ -235,7 +235,7 @@ Function* Function::getOverridden() const
 			}
 		}
 	}
-	return 0;
+	return nullptr;
 }
 
 

CppParser/src/NameSpace.cpp

@@ -94,7 +94,7 @@ Symbol* NameSpace::lookup(const std::string& name) const
 
 Symbol* NameSpace::lookup(const std::string& name, std::set<const NameSpace*>& alreadyVisited) const
 {
-	Symbol* pSymbol = 0;
+	Symbol* pSymbol = nullptr;
 	
 	if (name.empty())
 		return pSymbol;
@@ -125,7 +125,7 @@ Symbol* NameSpace::lookup(const std::string& name, std::set<const NameSpace*>& a
 			if (pNS)
 				pSymbol = static_cast<NameSpace*>(pSymbol)->lookup(tail, alreadyVisited);
 			else
-				pSymbol = 0;
+				pSymbol = nullptr;
 		}
 	}
 	else if (tail.empty())

CppParser/src/Parameter.cpp

@@ -29,7 +29,7 @@ int Parameter::_count(0);
 
 
 Parameter::Parameter(const std::string& decl, Function* /*pFunction*/):
-	Decl(handleDecl(decl), 0), // handle init values
+	Decl(handleDecl(decl), nullptr), // handle init values
 	_type(),
 	_isRef(false),
 	_isPointer(false),

CppParser/src/Parser.cpp

@@ -52,7 +52,7 @@ Parser::Parser(NameSpace::SymbolTable& gst, const std::string& file, std::istrea
 	_tokenizer(_istr),
 	_file(file),
 	_inFile(false),
-	_pCurrentSymbol(0),
+	_pCurrentSymbol(nullptr),
 	_access(Symbol::ACC_PUBLIC)
 {
 	Path p(file);
@@ -235,7 +235,7 @@ const Token* Parser::parseNameSpace(const Token* pNext)
 		fullName += name;
 
 		NameSpace* pNS = dynamic_cast<NameSpace*>(currentNameSpace()->lookup(fullName));
-		bool undefined = (pNS == 0);
+		bool undefined = (pNS == nullptr);
 		if (undefined) pNS = new NameSpace(name, currentNameSpace());
 		pushNameSpace(pNS, -1, undefined);
 		pNext = next();
@@ -287,7 +287,7 @@ const Token* Parser::parseClass(const Token* pNext, std::string& decl)
 {
 	poco_assert (isKeyword(pNext, IdentifierToken::KW_CLASS) || isKeyword(pNext, IdentifierToken::KW_STRUCT) || isKeyword(pNext, IdentifierToken::KW_UNION));
 
-	_pCurrentSymbol = 0;
+	_pCurrentSymbol = nullptr;
 	bool isClass = isKeyword(pNext, IdentifierToken::KW_CLASS);
 	int line = static_cast<int>(_istr.getCurrentLineNumber());
 	Symbol::Access prevAccess = _access;
@@ -324,7 +324,7 @@ const Token* Parser::parseClass(const Token* pNext, std::string& decl)
 			expectOperator(pNext, OperatorToken::OP_SEMICOLON, ";");
 			pNext = next();
 			_access = prevAccess;
-			_pCurrentSymbol = 0;
+			_pCurrentSymbol = nullptr;
 			return pNext;
 		}
 		if (isOperator(pNext, OperatorToken::OP_COLON) || isOperator(pNext, OperatorToken::OP_OPENBRACE))
@@ -346,7 +346,7 @@ const Token* Parser::parseClass(const Token* pNext, std::string& decl)
 	}
 	pNext = next();
 	_access = prevAccess;
-	_pCurrentSymbol = 0;
+	_pCurrentSymbol = nullptr;
 	return pNext;
 }
 
@@ -495,7 +495,7 @@ const Token* Parser::parseTypeDef(const Token* pNext)
 {
 	poco_assert (isKeyword(pNext, IdentifierToken::KW_TYPEDEF));
 
-	_pCurrentSymbol = 0;
+	_pCurrentSymbol = nullptr;
 	int line = static_cast<int>(_istr.getCurrentLineNumber());
 	std::string decl;
 	while (!isOperator(pNext, OperatorToken::OP_SEMICOLON) && !isEOF(pNext))
@@ -507,7 +507,7 @@ const Token* Parser::parseTypeDef(const Token* pNext)
 	addSymbol(pTypeDef, line);
 
 	pNext = next();
-	_pCurrentSymbol = 0;
+	_pCurrentSymbol = nullptr;
 	return pNext;
 }
 
@@ -516,7 +516,7 @@ const Token* Parser::parseUsing(const Token* pNext)
 {
 	poco_assert (isKeyword(pNext, IdentifierToken::KW_USING));
 
-	_pCurrentSymbol = 0;
+	_pCurrentSymbol = nullptr;
 	int line = static_cast<int>(_istr.getCurrentLineNumber());
 	pNext = next();
 	if (isKeyword(pNext, IdentifierToken::KW_NAMESPACE))
@@ -560,7 +560,7 @@ const Token* Parser::parseUsing(const Token* pNext)
 	if (!isOperator(pNext, OperatorToken::OP_SEMICOLON))
 		syntaxError("semicolon");
 	pNext = next();
-	_pCurrentSymbol = 0;
+	_pCurrentSymbol = nullptr;
 	return pNext;
 }
 
@@ -589,7 +589,7 @@ const Token* Parser::parseVarFunc(const Token* pNext)
 
 const Token* Parser::parseVarFunc(const Token* pNext, std::string& decl)
 {
-	_pCurrentSymbol = 0;
+	_pCurrentSymbol = nullptr;
 	std::string attrs;
 	if (isOperator(pNext, OperatorToken::OP_DBL_OPENBRACKET))
 	{
@@ -642,7 +642,7 @@ const Token* Parser::parseVarFunc(const Token* pNext, std::string& decl)
 			pNext = parseFunc(pNext, attrs, decl);
 		}
 	}
-	_pCurrentSymbol = 0;
+	_pCurrentSymbol = nullptr;
 	return pNext;
 }
 
@@ -674,7 +674,7 @@ const Token* Parser::parseFunc(const Token* pNext, const std::string& attrs, std
 	poco_assert (isOperator(pNext, OperatorToken::OP_OPENPARENT));
 
 	int line = static_cast<int>(_istr.getCurrentLineNumber());
-	Function* pFunc = 0;
+	Function* pFunc = nullptr;
 	std::string name = Symbol::extractName(decl);
 	if (name.find(':') == std::string::npos)
 	{
@@ -836,7 +836,7 @@ const Token* Parser::parseEnum(const Token* pNext)
 
 	std::string baseType;
 	int flags = 0;
-	_pCurrentSymbol = 0;
+	_pCurrentSymbol = nullptr;
 	int line = static_cast<int>(_istr.getCurrentLineNumber());
 	pNext = next();
 
@@ -883,14 +883,14 @@ const Token* Parser::parseEnum(const Token* pNext)
 	pNext = next();
 	expectOperator(pNext, OperatorToken::OP_SEMICOLON, ";");
 	pNext = next();
-	_pCurrentSymbol = 0;
+	_pCurrentSymbol = nullptr;
 	return pNext;
 }
 
 
 const Token* Parser::parseEnumValue(const Token* pNext, Enum* pEnum)
 {
-	_pCurrentSymbol = 0;
+	_pCurrentSymbol = nullptr;
 	_doc.clear();
 	int line = static_cast<int>(_istr.getCurrentLineNumber());
 	std::string name = pNext->tokenString();

CppParser/src/Struct.cpp

@@ -58,7 +58,7 @@ void Struct::addBase(const std::string& name, Symbol::Access access, bool isVirt
 	base.name      = name;
 	base.access    = access;
 	base.isVirtual = isVirtual;
-	base.pClass = 0;
+	base.pClass = nullptr;
 	_bases.push_back(base);
 }
 
@@ -154,7 +154,7 @@ Function* Struct::destructor() const
 		if (pFunc && pFunc->isDestructor())
 			return pFunc;
 	}
-	return 0;
+	return nullptr;
 }
 
 
@@ -220,7 +220,7 @@ Function* Struct::findFunction(const std::string& signature) const
 			if (pFunc) return pFunc;
 		}
 	}
-	return 0;
+	return nullptr;
 }
 
 

CppParser/src/Symbol.cpp

@@ -29,7 +29,7 @@ int Symbol::_nextId = 0;
 
 Symbol::Symbol():
 	_id(_nextId++),
-	_pNameSpace(0),
+	_pNameSpace(nullptr),
 	_access(ACC_PUBLIC),
 	_line(-1),
 	_order(0)

Crypto/include/Poco/Crypto/Crypto.h

@@ -119,7 +119,7 @@ inline std::string& getError(std::string& msg)
 	while ((err = ERR_get_error()))
 	{
 		if (!msg.empty()) msg.append(1, '\n');
-		msg.append(ERR_error_string(err, 0));
+		msg.append(ERR_error_string(err, nullptr));
 	}
 	return msg;
 }

Crypto/include/Poco/Crypto/ECKey.h

@@ -65,7 +65,7 @@ public:
 		/// If a private key is specified, you don't need to specify a public key file.
 		/// OpenSSL will auto-create the public key from the private key.
 
-	ECKey(std::istream* pPublicKeyStream, std::istream* pPrivateKeyStream = 0, const std::string& privateKeyPassphrase = "");
+	ECKey(std::istream* pPublicKeyStream, std::istream* pPrivateKeyStream = nullptr, const std::string& privateKeyPassphrase = "");
 		/// Creates the ECKey, by reading public and private key from the given streams and
 		/// using the given passphrase for the private key.
 		///

Crypto/include/Poco/Crypto/ECKeyImpl.h

@@ -95,7 +95,7 @@ public:
 		/// is not exported.
 
 	void save(std::ostream* pPublicKeyStream,
-		std::ostream* pPrivateKeyStream = 0,
+		std::ostream* pPrivateKeyStream = nullptr,
 		const std::string& privateKeyPassphrase = "") const;
 		/// Exports the public and private key to the given streams.
 		///

Crypto/include/Poco/Crypto/EVPPKey.h

@@ -149,7 +149,7 @@ public:
 		/// If an empty filename is specified, the corresponding key
 		/// is not exported.
 
-	void save(std::ostream* pPublicKeyStream, std::ostream* pPrivateKeyStream = 0, const std::string& privateKeyPassphrase = "") const;
+	void save(std::ostream* pPublicKeyStream, std::ostream* pPrivateKeyStream = nullptr, const std::string& privateKeyPassphrase = "") const;
 		/// Exports the public and/or private key to the given streams.
 		///
 		/// If a null pointer is passed for a stream, the corresponding
@@ -218,7 +218,7 @@ private:
 		poco_check_ptr (ppKey);
 		poco_assert_dbg (!*ppKey);
 
-		FILE* pFile = 0;
+		FILE* pFile = nullptr;
 		if (!keyFile.empty())
 		{
 			if (!getFunc) *ppKey = (K*)EVP_PKEY_new();
@@ -236,11 +236,11 @@ private:
 
 				if (pFile)
 				{
-					pem_password_cb* pCB = pass.empty() ? (pem_password_cb*)0 : &passCB;
-					void* pPassword = pass.empty() ? (void*)0 : (void*)pass.c_str();
+					pem_password_cb* pCB = pass.empty() ? (pem_password_cb*)nullptr : &passCB;
+					void* pPassword = pass.empty() ? (void*)nullptr : (void*)pass.c_str();
 					if (readFunc(pFile, &pKey, pCB, pPassword))
 					{
-						fclose(pFile); pFile = 0;
+						fclose(pFile); pFile = nullptr;
 						if(getFunc)
 						{
 							*ppKey = (K*)getFunc(pKey);
@@ -288,7 +288,7 @@ private:
 		poco_check_ptr(ppKey);
 		poco_assert_dbg(!*ppKey);
 
-		BIO* pBIO = 0;
+		BIO* pBIO = nullptr;
 		if (pIstr)
 		{
 			std::ostringstream ostr;
@@ -301,11 +301,11 @@ private:
 				EVP_PKEY* pKey = getFunc ? EVP_PKEY_new() : (EVP_PKEY*)*ppKey;
 				if (pKey)
 				{
-					pem_password_cb* pCB = pass.empty() ? (pem_password_cb*)0 : &passCB;
-					void* pPassword = pass.empty() ? (void*)0 : (void*)pass.c_str();
+					pem_password_cb* pCB = pass.empty() ? (pem_password_cb*)nullptr : &passCB;
+					void* pPassword = pass.empty() ? (void*)nullptr : (void*)pass.c_str();
 					if (readFunc(pBIO, &pKey, pCB, pPassword))
 					{
-						BIO_free(pBIO); pBIO = 0;
+						BIO_free(pBIO); pBIO = nullptr;
 						if (getFunc)
 						{
 							*ppKey = (K*)getFunc(pKey);
@@ -335,7 +335,7 @@ private:
 		throw OpenSSLException(msg);
 	}
 
-	EVP_PKEY* _pEVPPKey = 0;
+	EVP_PKEY* _pEVPPKey = nullptr;
 	static const std::map<int, std::string> KNOWN_TYPES;
 
 	friend class ECKeyImpl;

Crypto/include/Poco/Crypto/KeyPair.h

@@ -44,7 +44,7 @@ public:
 		KT_EC = KeyPairImpl::KT_EC_IMPL
 	};
 
-	explicit KeyPair(KeyPairImpl::Ptr pKeyPairImpl = 0);
+	explicit KeyPair(KeyPairImpl::Ptr pKeyPairImpl = nullptr);
 		/// Extracts the RSA public key from the given certificate.
 
 	KeyPair(const KeyPair& other);
@@ -74,7 +74,7 @@ public:
 		/// is not exported.
 
 	virtual void save(std::ostream* pPublicKeyPairStream,
-		std::ostream* pPrivateKeyPairStream = 0,
+		std::ostream* pPrivateKeyPairStream = nullptr,
 		const std::string& privateKeyPairPassphrase = "") const;
 		/// Exports the public and private key to the given streams.
 		///

Crypto/include/Poco/Crypto/KeyPairImpl.h

@@ -62,7 +62,7 @@ public:
 		/// is not exported.
 
 	virtual void save(std::ostream* pPublicKeyStream,
-		std::ostream* pPrivateKeyStream = 0,
+		std::ostream* pPrivateKeyStream = nullptr,
 		const std::string& privateKeyPassphrase = "") const = 0;
 		/// Exports the public and private key to the given streams.
 		///

Crypto/include/Poco/Crypto/PKCS12Container.h

@@ -103,7 +103,7 @@ private:
 
 inline bool PKCS12Container::hasX509Certificate() const
 {
-	return _pX509Cert.get() != 0;
+	return _pX509Cert.get() != nullptr;
 }
 
 
@@ -135,7 +135,7 @@ inline const PKCS12Container::CANameList& PKCS12Container::getFriendlyNamesCA()
 
 inline bool PKCS12Container::hasKey() const
 {
-	return _pKey != 0;
+	return _pKey != nullptr;
 }
 
 

Crypto/include/Poco/Crypto/RSAKeyImpl.h

@@ -103,7 +103,7 @@ public:
 		/// is not exported.
 
 	void save(std::ostream* pPublicKeyStream,
-		std::ostream* pPrivateKeyStream = 0,
+		std::ostream* pPrivateKeyStream = nullptr,
 		const std::string& privateKeyPassphrase = "") const;
 		/// Exports the public and private key to the given streams.
 		///

Crypto/src/CipherFactory.cpp

@@ -34,8 +34,8 @@ namespace Crypto {
 CipherFactory::CipherFactory()
 {
 #if OPENSSL_VERSION_NUMBER >= 0x30000000L
-	OSSL_PROVIDER_load(NULL, "default");
-	OSSL_PROVIDER_load(NULL, "legacy");
+	OSSL_PROVIDER_load(nullptr, "default");
+	OSSL_PROVIDER_load(nullptr, "legacy");
 #endif
 }
 

Crypto/src/CipherImpl.cpp

@@ -34,7 +34,7 @@ namespace
 		{
 			if (!msg.empty())
 				msg.append("; ");
-			msg.append(ERR_error_string(err, 0));
+			msg.append(ERR_error_string(err, nullptr));
 		}
 
 		throw Poco::IOException(msg);
@@ -103,7 +103,7 @@ namespace
 			_pContext,
 			_pCipher,
 			&_key[0],
-			_iv.empty() ? 0 : &_iv[0],
+			_iv.empty() ? nullptr : &_iv[0],
 			(dir == DIR_ENCRYPT) ? 1 : 0);
 #else
 		int rc = EVP_CipherInit(
@@ -119,9 +119,9 @@ namespace
 		if (_iv.size() != EVP_CIPHER_iv_length(_pCipher) && EVP_CIPHER_mode(_pCipher) == EVP_CIPH_GCM_MODE)
 		{
 #if OPENSSL_VERSION_NUMBER >= 0x10100000L
-			int rc = EVP_CIPHER_CTX_ctrl(_pContext, EVP_CTRL_GCM_SET_IVLEN, static_cast<int>(_iv.size()), NULL);
+			int rc = EVP_CIPHER_CTX_ctrl(_pContext, EVP_CTRL_GCM_SET_IVLEN, static_cast<int>(_iv.size()), nullptr);
 #else
-			int rc = EVP_CIPHER_CTX_ctrl(&_context, EVP_CTRL_GCM_SET_IVLEN, static_cast<int>(_iv.size()), NULL);
+			int rc = EVP_CIPHER_CTX_ctrl(&_context, EVP_CTRL_GCM_SET_IVLEN, static_cast<int>(_iv.size()), nullptr);
 #endif
 			if (rc == 0) throwError();
 		}

Crypto/src/CipherKeyImpl.cpp

@@ -32,7 +32,7 @@ namespace
 		{
 			if (!msg.empty())
 				msg.append("; ");
-			msg.append(ERR_error_string(err, 0));
+			msg.append(ERR_error_string(err, nullptr));
 		}
 
 		throw Poco::IOException(msg);
@@ -49,8 +49,8 @@ CipherKeyImpl::CipherKeyImpl(const std::string& name,
 	const std::string& salt,
 	int iterationCount,
 	const std::string& digest):
-	_pCipher(0),
-	_pDigest(0),
+	_pCipher(nullptr),
+	_pDigest(nullptr),
 	_name(name),
 	_key(),
 	_iv()
@@ -76,8 +76,8 @@ CipherKeyImpl::CipherKeyImpl(const std::string& name,
 CipherKeyImpl::CipherKeyImpl(const std::string& name,
 	const ByteVec& key,
 	const ByteVec& iv):
-	_pCipher(0),
-	_pDigest(0),
+	_pCipher(nullptr),
+	_pDigest(nullptr),
 	_name(name),
 	_key(key),
 	_iv(iv)
@@ -92,8 +92,8 @@ CipherKeyImpl::CipherKeyImpl(const std::string& name,
 
 
 CipherKeyImpl::CipherKeyImpl(const std::string& name):
-	_pCipher(0),
-	_pDigest(0),
+	_pCipher(nullptr),
+	_pDigest(nullptr),
 	_name(name),
 	_key(),
 	_iv()
@@ -198,7 +198,7 @@ void CipherKeyImpl::generateKey(
 	int keySize = EVP_BytesToKey(
 		_pCipher,
 		_pDigest ? _pDigest : EVP_md5(),
-		(salt.empty() ? 0 : saltBytes),
+		(salt.empty() ? nullptr : saltBytes),
 		reinterpret_cast<const unsigned char*>(password.data()),
 		static_cast<int>(password.size()),
 		iterationCount,

Crypto/src/CryptoStream.cpp

@@ -36,7 +36,7 @@ CryptoStreamBuf::CryptoStreamBuf(std::istream& istr, CryptoTransform::Ptr pTrans
 	Poco::BufferedStreamBuf(bufferSize, std::ios::in),
 	_pTransform(pTransform),
 	_pIstr(&istr),
-	_pOstr(0),
+	_pOstr(nullptr),
 	_eof(false),
 	_buffer(static_cast<std::size_t>(bufferSize))
 {
@@ -48,7 +48,7 @@ CryptoStreamBuf::CryptoStreamBuf(std::istream& istr, CryptoTransform::Ptr pTrans
 CryptoStreamBuf::CryptoStreamBuf(std::ostream& ostr, CryptoTransform::Ptr pTransform, std::streamsize bufferSize):
 	Poco::BufferedStreamBuf(bufferSize, std::ios::out),
 	_pTransform(pTransform),
-	_pIstr(0),
+	_pIstr(nullptr),
 	_pOstr(&ostr),
 	_eof(false),
 	_buffer(static_cast<std::size_t>(bufferSize))
@@ -76,7 +76,7 @@ void CryptoStreamBuf::close()
 
 	if (_pIstr)
 	{
-		_pIstr = 0;
+		_pIstr = nullptr;
 	}
 	else if (_pOstr)
 	{
@@ -84,7 +84,7 @@ void CryptoStreamBuf::close()
 		// sure that we call finalize() only once, even if an exception is
 		// thrown.
 		std::ostream* pOstr = _pOstr;
-		_pOstr = 0;
+		_pOstr = nullptr;
 
 		// Finalize transformation.
 		std::streamsize n = _pTransform->finalize(_buffer.begin(), static_cast<std::streamsize>(_buffer.size()));

Crypto/src/DigestEngine.cpp

@@ -26,7 +26,7 @@ DigestEngine::DigestEngine(const std::string& name):
 {
 	const EVP_MD* md = EVP_get_digestbyname(_name.c_str());
 	if (!md) throw Poco::NotFoundException(_name);
-	EVP_DigestInit_ex(_pContext, md, NULL);
+	EVP_DigestInit_ex(_pContext, md, nullptr);
 }
 
 
@@ -60,7 +60,7 @@ void DigestEngine::reset()
 #endif
 	const EVP_MD* md = EVP_get_digestbyname(_name.c_str());
 	if (!md) throw Poco::NotFoundException(_name);
-	EVP_DigestInit_ex(_pContext, md, NULL);
+	EVP_DigestInit_ex(_pContext, md, nullptr);
 }
 
 

Crypto/src/ECDSADigestEngine.cpp

@@ -114,7 +114,7 @@ ECDSASignature::ECDSASignature(const ByteVec& derSignature)
 	poco_assert (!derSignature.empty());
 
 	const unsigned char* p = &derSignature[0];
-	_pSig = d2i_ECDSA_SIG(0, &p, static_cast<long>(derSignature.size()));
+	_pSig = d2i_ECDSA_SIG(nullptr, &p, static_cast<long>(derSignature.size()));
 	if (!_pSig)
 		throw OpenSSLException();
 }
@@ -131,12 +131,12 @@ ECDSASignature::ECDSASignature(const ByteVec& rawR, const ByteVec& rawS):
 	{
 #if OPENSSL_VERSION_NUMBER >= 0x10100000L
 		ECDSA_SIG_set0(_pSig,
-			BN_bin2bn(&rawR[0], static_cast<long>(rawR.size()), 0),
-			BN_bin2bn(&rawS[0], static_cast<long>(rawS.size()), 0));
-		const BIGNUM* pR = 0;
-		const BIGNUM* pS = 0;
+			BN_bin2bn(&rawR[0], static_cast<long>(rawR.size()), nullptr),
+			BN_bin2bn(&rawS[0], static_cast<long>(rawS.size()), nullptr));
+		const BIGNUM* pR = nullptr;
+		const BIGNUM* pS = nullptr;
 		ECDSA_SIG_get0(_pSig, &pR, &pS);
-		if (pR == 0 || pS == 0)
+		if (pR == nullptr || pS == nullptr)
 			throw Poco::Crypto::CryptoException("failed to decode R and S values");
 #else
 		if (!BN_bin2bn(&rawR[0], rawR.size(), _pSig->r))
@@ -161,7 +161,7 @@ ECDSASignature::~ECDSASignature()
 
 ECDSASignature::ByteVec ECDSASignature::toDER() const
 {
-	int size = i2d_ECDSA_SIG(_pSig, 0);
+	int size = i2d_ECDSA_SIG(_pSig, nullptr);
 	if (size > 0)
 	{
 		ByteVec buffer(size);

Crypto/src/ECKeyImpl.cpp

@@ -38,7 +38,7 @@ ECKeyImpl::ECKeyImpl(const EVPPKey& key):
 
 ECKeyImpl::ECKeyImpl(const X509Certificate& cert):
 	KeyPairImpl("ec", KT_EC_IMPL),
-	_pEC(0)
+	_pEC(nullptr)
 {
 	const X509* pCert = cert.certificate();
 	if (pCert)
@@ -78,7 +78,7 @@ ECKeyImpl::ECKeyImpl(int curve):
 
 ECKeyImpl::ECKeyImpl(const std::string& publicKeyFile,
 	const std::string& privateKeyFile,
-	const std::string& privateKeyPassphrase): KeyPairImpl("ec", KT_EC_IMPL), _pEC(0)
+	const std::string& privateKeyPassphrase): KeyPairImpl("ec", KT_EC_IMPL), _pEC(nullptr)
 {
 	if (EVPPKey::loadKey(&_pEC, PEM_read_PrivateKey, EVP_PKEY_get1_EC_KEY, privateKeyFile, privateKeyPassphrase))
 	{
@@ -101,7 +101,7 @@ ECKeyImpl::ECKeyImpl(const std::string& publicKeyFile,
 
 ECKeyImpl::ECKeyImpl(std::istream* pPublicKeyStream,
 	std::istream* pPrivateKeyStream,
-	const std::string& privateKeyPassphrase): KeyPairImpl("ec", KT_EC_IMPL), _pEC(0)
+	const std::string& privateKeyPassphrase): KeyPairImpl("ec", KT_EC_IMPL), _pEC(nullptr)
 {
 	if (EVPPKey::loadKey(&_pEC, PEM_read_bio_PrivateKey, EVP_PKEY_get1_EC_KEY, pPrivateKeyStream, privateKeyPassphrase))
 	{
@@ -141,7 +141,7 @@ void ECKeyImpl::freeEC()
 	if (_pEC)
 	{
 		EC_KEY_free(_pEC);
-		_pEC = 0;
+		_pEC = nullptr;
 	}
 }
 
@@ -181,7 +181,7 @@ int ECKeyImpl::groupId() const
 std::string ECKeyImpl::getCurveName(int nid)
 {
 	std::string curveName;
-	size_t len = EC_get_builtin_curves(NULL, 0);
+	size_t len = EC_get_builtin_curves(nullptr, 0);
 	EC_builtin_curve* pCurves =
 			(EC_builtin_curve*) OPENSSL_malloc(sizeof(EC_builtin_curve) * len);
 	if (!pCurves) return curveName;
@@ -206,7 +206,7 @@ std::string ECKeyImpl::getCurveName(int nid)
 int ECKeyImpl::getCurveNID(std::string& name)
 {
 	std::string curveName;
-	size_t len = EC_get_builtin_curves(NULL, 0);
+	size_t len = EC_get_builtin_curves(nullptr, 0);
 	EC_builtin_curve* pCurves =
 		(EC_builtin_curve*)OPENSSL_malloc(static_cast<int>(sizeof(EC_builtin_curve) * len));
 	if (!pCurves) return -1;

Crypto/src/EVPCipherImpl.cpp

@@ -33,7 +33,7 @@ namespace
 		while ((err = ERR_get_error()))
 		{
 			if (!msg.empty()) msg.append("; ");
-			msg.append(ERR_error_string(err, 0));
+			msg.append(ERR_error_string(err, nullptr));
 		}
 
 		throw Poco::IOException(msg);
@@ -43,7 +43,7 @@ namespace
 	{
 	public:
 		EVPPKeyContext() = delete;
-		EVPPKeyContext(const EVP_PKEY* pEVP) : _pCtx(EVP_PKEY_CTX_new(const_cast<EVP_PKEY*>(pEVP), NULL))
+		EVPPKeyContext(const EVP_PKEY* pEVP) : _pCtx(EVP_PKEY_CTX_new(const_cast<EVP_PKEY*>(pEVP), nullptr))
 		{
 			if (!_pCtx)
 			{
@@ -73,7 +73,7 @@ namespace
 			_pEVP(pEVP),
 			_pCtx(_pEVP),
 			_pos(0),
-			_pBuf(0)
+			_pBuf(nullptr)
 		{
 			std::string fmt = "EVPEncryptImpl():%s()";
 			poco_check_ptr(_pEVP);
@@ -126,7 +126,7 @@ namespace
 				{
 					poco_assert (outputLength >= evpSize);
 					std::size_t outLen;
-					if (EVP_PKEY_encrypt(_pCtx, NULL, &outLen, _pBuf, static_cast<std::size_t>(maxSize)) <= 0)
+					if (EVP_PKEY_encrypt(_pCtx, nullptr, &outLen, _pBuf, static_cast<std::size_t>(maxSize)) <= 0)
 						throwError(Poco::format(fmt, std::string("EVP_PKEY_encrypt(NULL)")));
 					if (EVP_PKEY_encrypt(_pCtx, output, &outLen, _pBuf, static_cast<std::size_t>(maxSize)) <= 0)
 						throwError(Poco::format(fmt, std::string("EVP_PKEY_encrypt")));
@@ -156,7 +156,7 @@ namespace
 			std::size_t outLen = 0;
 			if (_pos > 0)
 			{
-				if (EVP_PKEY_encrypt(_pCtx, NULL, &outLen, _pBuf, static_cast<std::size_t>(_pos)) <= 0)
+				if (EVP_PKEY_encrypt(_pCtx, nullptr, &outLen, _pBuf, static_cast<std::size_t>(_pos)) <= 0)
 					throwError(Poco::format(fmt, std::string("EVP_PKEY_encrypt")));
 				if (EVP_PKEY_encrypt(_pCtx, output, &outLen, _pBuf, static_cast<std::size_t>(_pos)) <= 0)
 					throwError(Poco::format(fmt, std::string("EVP_PKEY_encrypt")));
@@ -169,7 +169,7 @@ namespace
 		{
 			std::string fmt = "EVPEncryptImpl::maxDataSize():%s()";
 			std::size_t outLength = 0;
-			if (EVP_PKEY_encrypt(_pCtx, NULL, &outLength, pIO, length) <= 0)
+			if (EVP_PKEY_encrypt(_pCtx, nullptr, &outLength, pIO, length) <= 0)
 				throwError(Poco::format(fmt, std::string("EVP_PKEY_encrypt")));
 			return outLength;
 		}
@@ -189,7 +189,7 @@ namespace
 			_pEVP(pEVP),
 			_pCtx(_pEVP),
 			_pos(0),
-			_pBuf(0)
+			_pBuf(nullptr)
 		{
 			std::string fmt = "EVPDecryptImpl():%s()";
 			poco_check_ptr(_pEVP);
@@ -237,7 +237,7 @@ namespace
 				if (missing == 0)
 				{
 					std::size_t outLen = 0;
-					if (EVP_PKEY_decrypt(_pCtx, NULL, &outLen, _pBuf, static_cast<std::size_t>(_pos)) <= 0)
+					if (EVP_PKEY_decrypt(_pCtx, nullptr, &outLen, _pBuf, static_cast<std::size_t>(_pos)) <= 0)
 						throwError(Poco::format(fmt, std::string("EVP_PKEY_decrypt(NULL)")));
 					if (EVP_PKEY_decrypt(_pCtx, output, &outLen, _pBuf, static_cast<std::size_t>(_pos)) <= 0)
 						throwError(Poco::format(fmt, std::string("EVP_PKEY_decrypt")));
@@ -263,7 +263,7 @@ namespace
 			poco_assert (length >= _blockSize);
 			std::string fmt = "EVPDecryptImpl::finalize():%s()";
 			std::size_t outLen = 0;
-			if (EVP_PKEY_decrypt(_pCtx, NULL, &outLen, _pBuf, static_cast<std::size_t>(_pos)) <= 0)
+			if (EVP_PKEY_decrypt(_pCtx, nullptr, &outLen, _pBuf, static_cast<std::size_t>(_pos)) <= 0)
 					throwError(Poco::format(fmt, std::string("EVP_PKEY_decrypt(NULL)")));
 			poco_assert (length >= outLen);
 			if (_pos > 0)

Crypto/src/EVPPKey.cpp

@@ -39,7 +39,7 @@ const std::map<int, std::string> EVPPKey::KNOWN_TYPES =
 	};
 
 
-EVPPKey::EVPPKey(const std::string& ecCurveName): _pEVPPKey(0)
+EVPPKey::EVPPKey(const std::string& ecCurveName) : _pEVPPKey(nullptr)
 {
 	newECKey(ecCurveName.c_str());
 	poco_check_ptr(_pEVPPKey);
@@ -47,7 +47,7 @@ EVPPKey::EVPPKey(const std::string& ecCurveName): _pEVPPKey(0)
 }
 
 
-EVPPKey::EVPPKey(const char* ecCurveName): _pEVPPKey(0)
+EVPPKey::EVPPKey(const char* ecCurveName) : _pEVPPKey(nullptr)
 {
 	newECKey(ecCurveName);
 	poco_check_ptr(_pEVPPKey);
@@ -55,8 +55,7 @@ EVPPKey::EVPPKey(const char* ecCurveName): _pEVPPKey(0)
 }
 
 
-EVPPKey::EVPPKey(const X509Certificate& cert):
-	_pEVPPKey(X509_get_pubkey(const_cast<X509*>(cert.certificate())))
+EVPPKey::EVPPKey(const X509Certificate& cert): _pEVPPKey(X509_get_pubkey(const_cast<X509*>(cert.certificate())))
 {
 	poco_check_ptr(_pEVPPKey);
 	checkType();
@@ -138,7 +137,7 @@ void EVPPKey::setKeyFromParameters(OSSL_PARAM* parameters)
 		throw OpenSSLException("EVPPKey cannot init create key");
 	}
 
-	if (_pEVPPKey != 0) EVP_PKEY_free(_pEVPPKey);
+	if (_pEVPPKey != nullptr) EVP_PKEY_free(_pEVPPKey);
 	if (EVP_PKEY_fromdata(ctx, &_pEVPPKey, EVP_PKEY_KEYPAIR, parameters) <= 0)
 	{
 		OSSL_PARAM_free(parameters);
@@ -150,7 +149,7 @@ void EVPPKey::setKeyFromParameters(OSSL_PARAM* parameters)
 }
 
 
-EVPPKey::EVPPKey(const std::vector<unsigned char>* public_key, const std::vector<unsigned char>* private_key, unsigned long exponent, int type) : _pEVPPKey(0)
+EVPPKey::EVPPKey(const std::vector<unsigned char>* public_key, const std::vector<unsigned char>* private_key, unsigned long exponent, int type) : _pEVPPKey(nullptr)
 {
 	if ((EVP_PKEY_RSA != type) || (RSA_F4 != exponent))
 	{
@@ -175,10 +174,10 @@ EVPPKey::EVPPKey(const std::vector<unsigned char>* public_key, const std::vector
 
 #if OPENSSL_VERSION_NUMBER >= 0x10000000L
 
-EVPPKey::EVPPKey(int type, int param): _pEVPPKey(0)
+EVPPKey::EVPPKey(int type, int param) : _pEVPPKey(nullptr)
 {
-	EVP_PKEY_CTX *pCtx = EVP_PKEY_CTX_new_id(type, NULL);
-	if (NULL == pCtx)
+	EVP_PKEY_CTX* pCtx = EVP_PKEY_CTX_new_id(type, nullptr);
+	if (nullptr == pCtx)
 	{
 		std::string msg = Poco::format(
 			"EVPPKey(%d, %d):EVP_PKEY_CTX_new_id()\n", type, param);
@@ -236,7 +235,7 @@ EVPPKey::EVPPKey(int type, int param): _pEVPPKey(0)
 #endif // OPENSSL_VERSION_NUMBER >= 0x10000000L
 
 
-EVPPKey::EVPPKey(EVP_PKEY* pEVPPKey): _pEVPPKey(0)
+EVPPKey::EVPPKey(EVP_PKEY* pEVPPKey) : _pEVPPKey(nullptr)
 {
 	duplicate(pEVPPKey, &_pEVPPKey);
 	poco_check_ptr(_pEVPPKey);
@@ -244,19 +243,16 @@ EVPPKey::EVPPKey(EVP_PKEY* pEVPPKey): _pEVPPKey(0)
 }
 
 
-EVPPKey::EVPPKey(const std::string& publicKeyFile,
-	const std::string& privateKeyFile,
-	const std::string& privateKeyPassphrase): _pEVPPKey(0)
+EVPPKey::EVPPKey(const std::string& publicKeyFile, const std::string& privateKeyFile, const std::string& privateKeyPassphrase) : _pEVPPKey(nullptr)
 {
-	if (loadKey(&_pEVPPKey, PEM_read_PrivateKey, (EVP_PKEY_get_Key_fn)0, privateKeyFile, privateKeyPassphrase))
+	if (loadKey(&_pEVPPKey, PEM_read_PrivateKey, (EVP_PKEY_get_Key_fn) nullptr, privateKeyFile, privateKeyPassphrase))
 	{
 		poco_check_ptr(_pEVPPKey);
 		return; // private key is enough
 	}
 
 	// no private key, this must be public key only, otherwise throw
-	if (!loadKey(&_pEVPPKey, PEM_read_PUBKEY, (EVP_PKEY_get_Key_fn)0, publicKeyFile))
-	{
+	if (!loadKey(&_pEVPPKey, PEM_read_PUBKEY, (EVP_PKEY_get_Key_fn) nullptr, publicKeyFile)) {
 		std::string msg = "EVPPKey(const string&, const string&, const string&)\n";
 		throw OpenSSLException(getError(msg));
 	}
@@ -265,19 +261,16 @@ EVPPKey::EVPPKey(const std::string& publicKeyFile,
 }
 
 
-EVPPKey::EVPPKey(std::istream* pPublicKeyStream,
-	std::istream* pPrivateKeyStream,
-	const std::string& privateKeyPassphrase): _pEVPPKey(0)
+EVPPKey::EVPPKey(std::istream* pPublicKeyStream, std::istream* pPrivateKeyStream, const std::string& privateKeyPassphrase) : _pEVPPKey(nullptr)
 {
-	if (loadKey(&_pEVPPKey, PEM_read_bio_PrivateKey, (EVP_PKEY_get_Key_fn)0, pPrivateKeyStream, privateKeyPassphrase))
+	if (loadKey(&_pEVPPKey, PEM_read_bio_PrivateKey, (EVP_PKEY_get_Key_fn) nullptr, pPrivateKeyStream, privateKeyPassphrase))
 	{
 		poco_check_ptr(_pEVPPKey);
 		return; // private key is enough
 	}
 
 	// no private key, this must be public key only, otherwise throw
-	if (!loadKey(&_pEVPPKey, PEM_read_bio_PUBKEY, (EVP_PKEY_get_Key_fn)0, pPublicKeyStream))
-	{
+	if (!loadKey(&_pEVPPKey, PEM_read_bio_PUBKEY, (EVP_PKEY_get_Key_fn) nullptr, pPublicKeyStream)) {
 		std::string msg = "EVPPKey(istream* ,istream* const string&)\n";
 		throw OpenSSLException(getError(msg));
 	}
@@ -416,13 +409,13 @@ void EVPPKey::save(const std::string& publicKeyFile, const std::string& privateK
 				int rc = 0;
 				if (privateKeyPassphrase.empty())
 				{
-					rc = PEM_write_bio_PrivateKey(bio, _pEVPPKey, 0, 0, 0, 0, 0);
+					rc = PEM_write_bio_PrivateKey(bio, _pEVPPKey, nullptr, nullptr, 0, nullptr, nullptr);
 				}
 				else
 				{
 					rc = PEM_write_bio_PrivateKey(bio, _pEVPPKey, EVP_des_ede3_cbc(),
-						reinterpret_cast<unsigned char*>(const_cast<char*>(privateKeyPassphrase.c_str())),
-						static_cast<int>(privateKeyPassphrase.length()), 0, 0);
+							reinterpret_cast<unsigned char *>( const_cast<char *>( privateKeyPassphrase.c_str())),
+							static_cast<int>(privateKeyPassphrase.length()), nullptr, nullptr);
 				}
 				if (!rc)
 				{
@@ -483,11 +476,11 @@ void EVPPKey::save(std::ostream* pPublicKeyStream, std::ostream* pPrivateKeyStre
 		}
 		int rc = 0;
 		if (privateKeyPassphrase.empty())
-			rc = PEM_write_bio_PrivateKey(bio, _pEVPPKey, 0, 0, 0, 0, 0);
+			rc = PEM_write_bio_PrivateKey(bio, _pEVPPKey, nullptr, nullptr, 0, nullptr, nullptr);
 		else
 			rc = PEM_write_bio_PrivateKey(bio, _pEVPPKey, EVP_des_ede3_cbc(),
-				reinterpret_cast<unsigned char*>(const_cast<char*>(privateKeyPassphrase.c_str())),
-				static_cast<int>(privateKeyPassphrase.length()), 0, 0);
+					reinterpret_cast<unsigned char *>( const_cast<char *>(privateKeyPassphrase.c_str())),
+					static_cast<int>(privateKeyPassphrase.length()), nullptr, nullptr);
 		if (!rc)
 		{
 			std::string msg = "EVPPKey::save(ostream*, ostream*, const string&)\n";

Crypto/src/Envelope.cpp

@@ -65,7 +65,7 @@ void Envelope::addKey(const EVPPKey& key)
 
 const Envelope::ByteVec& Envelope::seal(const ByteVec& plainData)
 {
-	std::vector<Byte*> pEncKeys(_encKeys.size(), 0);
+	std::vector<Byte *> pEncKeys(_encKeys.size(), nullptr);
 	std::vector<int> encKeysSizes(_encKeys.size(), 0);
 	int i = 0;
 	for (const auto& k : _encKeys)
@@ -153,7 +153,7 @@ void Envelope::handleErrors(std::string&& msg)
 	while ((err = ERR_get_error()))
 	{
 		if (!msg.empty()) msg.append("\n");
-		msg.append(ERR_error_string(err, 0));
+		msg.append(ERR_error_string(err, nullptr));
 	}
 	throw CryptoException(msg);
 }

Crypto/src/OpenSSLInitializer.cpp

@@ -66,8 +66,8 @@ Poco::FastMutex* OpenSSLInitializer::_mutexes(0);
 #endif
 
 #if OPENSSL_VERSION_NUMBER >= 0x30000000L
-OSSL_PROVIDER* OpenSSLInitializer::_defaultProvider(0);
-OSSL_PROVIDER* OpenSSLInitializer::_legacyProvider(0);
+OSSL_PROVIDER* OpenSSLInitializer::_defaultProvider(nullptr);
+OSSL_PROVIDER* OpenSSLInitializer::_legacyProvider(nullptr);
 #endif
 
 
@@ -95,9 +95,9 @@ void OpenSSLInitializer::initialize()
 	if (++_rc == 1)
 	{
 #if OPENSSL_VERSION_NUMBER >= 0x10100000L
-		CONF_modules_load(NULL, NULL, 0);
+		CONF_modules_load(nullptr, nullptr, 0);
 #else
-		OPENSSL_config(NULL);
+		OPENSSL_config(nullptr);
 #endif
 
 #if OPENSSL_VERSION_NUMBER < 0x10100000L
@@ -131,12 +131,12 @@ void OpenSSLInitializer::initialize()
 #if OPENSSL_VERSION_NUMBER >= 0x30000000L
 		if (!_defaultProvider)
 		{
-			_defaultProvider = OSSL_PROVIDER_load(NULL, "default");
+			_defaultProvider = OSSL_PROVIDER_load(nullptr, "default");
 			if (!_defaultProvider) throw CryptoException("Failed to load OpenSSL default provider");
 		}
 		if (!_legacyProvider)
 		{
-			_legacyProvider = OSSL_PROVIDER_load(NULL, "legacy");
+			_legacyProvider = OSSL_PROVIDER_load(nullptr, "legacy");
 			// Note: use haveLegacyProvider() to check if legacy provider has been loaded
 		}
 #endif

Crypto/src/PKCS12Container.cpp

@@ -19,7 +19,6 @@
 
 
 #include "Poco/Crypto/PKCS12Container.h"
-#include "Poco/NumberFormatter.h"
 #include "Poco/StreamCopier.h"
 #include <sstream>
 #include <openssl/err.h>
@@ -29,7 +28,7 @@ namespace Poco {
 namespace Crypto {
 
 
-PKCS12Container::PKCS12Container(std::istream& istr, const std::string& password): _pKey(0)
+PKCS12Container::PKCS12Container(std::istream& istr, const std::string& password) : _pKey(nullptr)
 {
 	std::ostringstream ostr;
 	Poco::StreamCopier::copyStream(istr, ostr);
@@ -38,7 +37,7 @@ PKCS12Container::PKCS12Container(std::istream& istr, const std::string& password
 	BIO *pBIO = BIO_new_mem_buf(const_cast<char*>(cont.data()), static_cast<int>(cont.size()));
 	if (pBIO)
 	{
-		PKCS12* pPKCS12 = 0;
+		PKCS12* pPKCS12 = nullptr;
 		d2i_PKCS12_bio(pBIO, &pPKCS12);
 		BIO_free(pBIO);
 		if (!pPKCS12) throw OpenSSLException("PKCS12Container(istream&, const string&)");
@@ -51,12 +50,12 @@ PKCS12Container::PKCS12Container(std::istream& istr, const std::string& password
 }
 
 
-PKCS12Container::PKCS12Container(const std::string& path, const std::string& password): _pKey(0)
+PKCS12Container::PKCS12Container(const std::string& path, const std::string& password) : _pKey(nullptr)
 {
 	FILE* pFile = fopen(path.c_str(), "rb");
 	if (pFile)
 	{
-		PKCS12* pPKCS12 = d2i_PKCS12_fp(pFile, NULL);
+		PKCS12* pPKCS12 = d2i_PKCS12_fp(pFile, nullptr);
 		fclose (pFile);
 		if (!pPKCS12) throw OpenSSLException("PKCS12Container(const string&, const string&)");
 		load(pPKCS12, password);
@@ -145,8 +144,8 @@ void PKCS12Container::load(PKCS12* pPKCS12, const std::string& password)
 {
 	if (pPKCS12)
 	{
-		X509* pCert = 0;
-		STACK_OF(X509)* pCA = 0;
+		X509* pCert = nullptr;
+		STACK_OF(X509)* pCA = nullptr;
 		if (PKCS12_parse(pPKCS12, password.c_str(), &_pKey, &pCert, &pCA))
 		{
 			if (pCert)

Crypto/src/RSACipherImpl.cpp

@@ -35,7 +35,7 @@ namespace
 		{
 			if (!msg.empty())
 				msg.append("; ");
-			msg.append(ERR_error_string(err, 0));
+			msg.append(ERR_error_string(err, nullptr));
 		}
 
 		throw Poco::IOException(msg);
@@ -90,7 +90,7 @@ namespace
 			_pRSA(pRSA),
 			_paddingMode(paddingMode),
 			_pos(0),
-			_pBuf(0)
+			_pBuf(nullptr)
 	{
 		_pBuf = new unsigned char[blockSize()];
 	}
@@ -223,11 +223,11 @@ namespace
 	};
 
 
-	RSADecryptImpl::RSADecryptImpl(const RSA* pRSA, RSAPaddingMode paddingMode):
+	RSADecryptImpl::RSADecryptImpl(const RSA *pRSA, RSAPaddingMode paddingMode) :
 			_pRSA(pRSA),
 			_paddingMode(paddingMode),
 			_pos(0),
-			_pBuf(0)
+			_pBuf(nullptr)
 	{
 		_pBuf = new unsigned char[blockSize()];
 	}

Crypto/src/RSAKeyImpl.cpp

@@ -15,9 +15,7 @@
 #include "Poco/Crypto/RSAKeyImpl.h"
 #include "Poco/Crypto/X509Certificate.h"
 #include "Poco/Crypto/PKCS12Container.h"
-#include "Poco/FileStream.h"
 #include "Poco/StreamCopier.h"
-#include <sstream>
 #include <openssl/pem.h>
 #include <openssl/rsa.h>
 #include <openssl/evp.h>
@@ -38,7 +36,7 @@ RSAKeyImpl::RSAKeyImpl(const EVPPKey& key):
 
 RSAKeyImpl::RSAKeyImpl(const X509Certificate& cert):
 	KeyPairImpl("rsa", KT_RSA_IMPL),
-	_pRSA(0)
+	_pRSA(nullptr)
 {
 	const X509* pCert = cert.certificate();
 	EVP_PKEY* pKey = X509_get_pubkey(const_cast<X509*>(pCert));
@@ -54,24 +52,24 @@ RSAKeyImpl::RSAKeyImpl(const X509Certificate& cert):
 
 RSAKeyImpl::RSAKeyImpl(const PKCS12Container& cont):
 	KeyPairImpl("rsa", KT_RSA_IMPL),
-	_pRSA(0)
+	_pRSA(nullptr)
 {
 	EVPPKey key = cont.getKey();
 	_pRSA = EVP_PKEY_get1_RSA(key);
 }
 
 
-RSAKeyImpl::RSAKeyImpl(int keyLength, unsigned long exponent): KeyPairImpl("rsa", KT_RSA_IMPL),
-	_pRSA(0)
+RSAKeyImpl::RSAKeyImpl(int keyLength, unsigned long exponent) : KeyPairImpl("rsa", KT_RSA_IMPL),
+	_pRSA(nullptr)
 {
 	_pRSA = RSA_new();
 	int ret = 0;
-	BIGNUM* bn = 0;
+	BIGNUM* bn = nullptr;
 	try
 	{
 		bn = BN_new();
 		BN_set_word(bn, exponent);
-		ret = RSA_generate_key_ex(_pRSA, keyLength, bn, 0);
+		ret = RSA_generate_key_ex(_pRSA, keyLength, bn, nullptr);
 		BN_free(bn);
 	}
 	catch (...)
@@ -83,12 +81,11 @@ RSAKeyImpl::RSAKeyImpl(int keyLength, unsigned long exponent): KeyPairImpl("rsa"
 }
 
 
-RSAKeyImpl::RSAKeyImpl(const std::string& publicKeyFile,
-	const std::string& privateKeyFile,
-	const std::string& privateKeyPassphrase): KeyPairImpl("rsa", KT_RSA_IMPL),
-		_pRSA(0)
+RSAKeyImpl::RSAKeyImpl(const std::string& publicKeyFile, const std::string& privateKeyFile, const std::string& privateKeyPassphrase):
+	KeyPairImpl("rsa", KT_RSA_IMPL),
+	_pRSA(nullptr)
 {
-	poco_assert_dbg(_pRSA == 0);
+	poco_assert_dbg(_pRSA == nullptr);
 
 	_pRSA = RSA_new();
 	if (!publicKeyFile.empty())
@@ -98,14 +95,14 @@ RSAKeyImpl::RSAKeyImpl(const std::string& publicKeyFile,
 		int rc = BIO_read_filename(bio, publicKeyFile.c_str());
 		if (rc)
 		{
-			RSA* pubKey = PEM_read_bio_RSAPublicKey(bio, &_pRSA, 0, 0);
+			RSA* pubKey = PEM_read_bio_RSAPublicKey(bio, &_pRSA, nullptr, nullptr);
 			if (!pubKey)
 			{
 				int rc = BIO_reset(bio);
 				// BIO_reset() normally returns 1 for success and 0 or -1 for failure.
 				// File BIOs are an exception, they return 0 for success and -1 for failure.
 				if (rc != 0) throw Poco::FileException("Failed to load public key", publicKeyFile);
-				pubKey = PEM_read_bio_RSA_PUBKEY(bio, &_pRSA, 0, 0);
+				pubKey = PEM_read_bio_RSA_PUBKEY(bio, &_pRSA, nullptr, nullptr);
 			}
 			BIO_free(bio);
 			if (!pubKey)
@@ -128,11 +125,11 @@ RSAKeyImpl::RSAKeyImpl(const std::string& publicKeyFile,
 		int rc = BIO_read_filename(bio, privateKeyFile.c_str());
 		if (rc)
 		{
-			RSA* privKey = 0;
+			RSA* privKey = nullptr;
 			if (privateKeyPassphrase.empty())
-				privKey = PEM_read_bio_RSAPrivateKey(bio, &_pRSA, 0, 0);
+				privKey = PEM_read_bio_RSAPrivateKey(bio, &_pRSA, nullptr, nullptr);
 			else
-				privKey = PEM_read_bio_RSAPrivateKey(bio, &_pRSA, 0, const_cast<char*>(privateKeyPassphrase.c_str()));
+				privKey = PEM_read_bio_RSAPrivateKey(bio, &_pRSA, nullptr, const_cast<char *>( privateKeyPassphrase.c_str()));
 			BIO_free(bio);
 			if (!privKey)
 			{
@@ -149,12 +146,11 @@ RSAKeyImpl::RSAKeyImpl(const std::string& publicKeyFile,
 }
 
 
-RSAKeyImpl::RSAKeyImpl(std::istream* pPublicKeyStream,
-	std::istream* pPrivateKeyStream,
-	const std::string& privateKeyPassphrase): KeyPairImpl("rsa", KT_RSA_IMPL),
-		_pRSA(0)
+RSAKeyImpl::RSAKeyImpl(std::istream* pPublicKeyStream, std::istream* pPrivateKeyStream, const std::string& privateKeyPassphrase):
+	KeyPairImpl("rsa", KT_RSA_IMPL),
+	_pRSA(nullptr)
 {
-	poco_assert_dbg(_pRSA == 0);
+	poco_assert_dbg(_pRSA == nullptr);
 
 	_pRSA = RSA_new();
 	if (pPublicKeyStream)
@@ -163,14 +159,14 @@ RSAKeyImpl::RSAKeyImpl(std::istream* pPublicKeyStream,
 		Poco::StreamCopier::copyToString(*pPublicKeyStream, publicKeyData);
 		BIO* bio = BIO_new_mem_buf(const_cast<char*>(publicKeyData.data()), static_cast<int>(publicKeyData.size()));
 		if (!bio) throw Poco::IOException("Cannot create BIO for reading public key");
-		RSA* publicKey = PEM_read_bio_RSAPublicKey(bio, &_pRSA, 0, 0);
+		RSA* publicKey = PEM_read_bio_RSAPublicKey(bio, &_pRSA, nullptr, nullptr);
 		if (!publicKey)
 		{
 			int rc = BIO_reset(bio);
 			// BIO_reset() normally returns 1 for success and 0 or -1 for failure.
 			// File BIOs are an exception, they return 0 for success and -1 for failure.
 			if (rc != 1) throw Poco::FileException("Failed to load public key");
-			publicKey = PEM_read_bio_RSA_PUBKEY(bio, &_pRSA, 0, 0);
+			publicKey = PEM_read_bio_RSA_PUBKEY(bio, &_pRSA, nullptr, nullptr);
 		}
 		BIO_free(bio);
 		if (!publicKey)
@@ -186,11 +182,11 @@ RSAKeyImpl::RSAKeyImpl(std::istream* pPublicKeyStream,
 		Poco::StreamCopier::copyToString(*pPrivateKeyStream, privateKeyData);
 		BIO* bio = BIO_new_mem_buf(const_cast<char*>(privateKeyData.data()), static_cast<int>(privateKeyData.size()));
 		if (!bio) throw Poco::IOException("Cannot create BIO for reading private key");
-		RSA* privateKey = 0;
+		RSA* privateKey = nullptr;
 		if (privateKeyPassphrase.empty())
-			privateKey = PEM_read_bio_RSAPrivateKey(bio, &_pRSA, 0, 0);
+			privateKey = PEM_read_bio_RSAPrivateKey(bio, &_pRSA, nullptr, nullptr);
 		else
-			privateKey = PEM_read_bio_RSAPrivateKey(bio, &_pRSA, 0, const_cast<char*>(privateKeyPassphrase.c_str()));
+			privateKey = PEM_read_bio_RSAPrivateKey(bio, &_pRSA, nullptr, const_cast<char *>(privateKeyPassphrase.c_str()));
 		BIO_free(bio);
 		if (!privateKey)
 		{
@@ -210,7 +206,7 @@ RSAKeyImpl::~RSAKeyImpl()
 void RSAKeyImpl::freeRSA()
 {
 	if (_pRSA) RSA_free(_pRSA);
-	_pRSA = 0;
+	_pRSA = nullptr;
 }
 
 
@@ -223,9 +219,9 @@ int RSAKeyImpl::size() const
 RSAKeyImpl::ByteVec RSAKeyImpl::modulus() const
 {
 #if OPENSSL_VERSION_NUMBER >= 0x10100000L
-	const BIGNUM* n = 0;
-	const BIGNUM* e = 0;
-	const BIGNUM* d = 0;
+	const BIGNUM* n = nullptr;
+	const BIGNUM* e = nullptr;
+	const BIGNUM* d = nullptr;
 	RSA_get0_key(_pRSA, &n, &e, &d);
 	return convertToByteVec(n);
 #else
@@ -237,9 +233,9 @@ RSAKeyImpl::ByteVec RSAKeyImpl::modulus() const
 RSAKeyImpl::ByteVec RSAKeyImpl::encryptionExponent() const
 {
 #if OPENSSL_VERSION_NUMBER >= 0x10100000L
-	const BIGNUM* n = 0;
-	const BIGNUM* e = 0;
-	const BIGNUM* d = 0;
+	const BIGNUM* n = nullptr;
+	const BIGNUM* e = nullptr;
+	const BIGNUM* d = nullptr;
 	RSA_get0_key(_pRSA, &n, &e, &d);
 	return convertToByteVec(e);
 #else
@@ -251,9 +247,9 @@ RSAKeyImpl::ByteVec RSAKeyImpl::encryptionExponent() const
 RSAKeyImpl::ByteVec RSAKeyImpl::decryptionExponent() const
 {
 #if OPENSSL_VERSION_NUMBER >= 0x10100000L
-	const BIGNUM* n = 0;
-	const BIGNUM* e = 0;
-	const BIGNUM* d = 0;
+	const BIGNUM* n = nullptr;
+	const BIGNUM* e = nullptr;
+	const BIGNUM* d = nullptr;
 	RSA_get0_key(_pRSA, &n, &e, &d);
 	return convertToByteVec(d);
 #else
@@ -297,11 +293,11 @@ void RSAKeyImpl::save(const std::string& publicKeyFile,
 			{
 				int rc = 0;
 				if (privateKeyPassphrase.empty())
-					rc = PEM_write_bio_RSAPrivateKey(bio, _pRSA, 0, 0, 0, 0, 0);
+					rc = PEM_write_bio_RSAPrivateKey(bio, _pRSA, nullptr, nullptr, 0, nullptr, nullptr);
 				else
 					rc = PEM_write_bio_RSAPrivateKey(bio, _pRSA, EVP_des_ede3_cbc(),
-						reinterpret_cast<unsigned char*>(const_cast<char*>(privateKeyPassphrase.c_str())),
-						static_cast<int>(privateKeyPassphrase.length()), 0, 0);
+							 reinterpret_cast<unsigned char *>( const_cast<char *>( privateKeyPassphrase.c_str())),
+							 static_cast<int>(privateKeyPassphrase.length()), nullptr, nullptr);
 				if (!rc) throw Poco::FileException("Failed to write private key to file", privateKeyFile);
 			}
 			else throw Poco::CreateFileException("Cannot create private key file", privateKeyFile);
@@ -341,11 +337,12 @@ void RSAKeyImpl::save(std::ostream* pPublicKeyStream,
 		if (!bio) throw Poco::IOException("Cannot create BIO for writing public key");
 		int rc = 0;
 		if (privateKeyPassphrase.empty())
-			rc = PEM_write_bio_RSAPrivateKey(bio, _pRSA, 0, 0, 0, 0, 0);
+			rc = PEM_write_bio_RSAPrivateKey(bio, _pRSA, nullptr, nullptr, 0, nullptr, nullptr);
 		else
-			rc = PEM_write_bio_RSAPrivateKey(bio, _pRSA, EVP_des_ede3_cbc(),
-				reinterpret_cast<unsigned char*>(const_cast<char*>(privateKeyPassphrase.c_str())),
-				static_cast<int>(privateKeyPassphrase.length()), 0, 0);
+			rc = PEM_write_bio_RSAPrivateKey(bio,
+					_pRSA, EVP_des_ede3_cbc(),
+					reinterpret_cast<unsigned char *>( const_cast<char *>(privateKeyPassphrase.c_str())),
+					static_cast<int>(privateKeyPassphrase.length()), nullptr, nullptr);
 		if (!rc)
 		{
 			BIO_free(bio);

Crypto/src/X509Certificate.cpp

@@ -15,7 +15,6 @@
 #include "Poco/Crypto/X509Certificate.h"
 #include "Poco/Crypto/CryptoException.h"
 #include "Poco/StreamCopier.h"
-#include "Poco/String.h"
 #include "Poco/DateTimeParser.h"
 #include "Poco/Format.h"
 #include <sstream>
@@ -41,15 +40,13 @@ namespace Poco {
 namespace Crypto {
 
 
-X509Certificate::X509Certificate(std::istream& istr):
-	_pCert(0)
+X509Certificate::X509Certificate(std::istream& istr) : _pCert(nullptr)
 {
 	load(istr);
 }
 
 
-X509Certificate::X509Certificate(const std::string& path):
-	_pCert(0)
+X509Certificate::X509Certificate(const std::string& path) : _pCert(nullptr)
 {
 	load(path);
 }
@@ -147,7 +144,7 @@ void X509Certificate::load(std::istream& istr)
 
 	BIO *pBIO = BIO_new_mem_buf(const_cast<char*>(cert.data()), static_cast<int>(cert.size()));
 	if (!pBIO) throw Poco::IOException("Cannot create BIO for reading certificate");
-	_pCert = PEM_read_bio_X509(pBIO, 0, 0, 0);
+	_pCert = PEM_read_bio_X509(pBIO, nullptr, nullptr, nullptr);
 	BIO_free(pBIO);
 
 	if (!_pCert) throw Poco::IOException("Failed to load certificate from stream");
@@ -168,7 +165,7 @@ void X509Certificate::load(const std::string& path)
 		throw Poco::OpenFileException("Cannot open certificate file for reading", path);
 	}
 
-	_pCert = PEM_read_bio_X509(pBIO, 0, 0, 0);
+	_pCert = PEM_read_bio_X509(pBIO, nullptr, nullptr, nullptr);
 	BIO_free(pBIO);
 
 	if (!_pCert) throw Poco::ReadFileException("Faild to load certificate from", path);
@@ -239,7 +236,7 @@ void X509Certificate::init()
 {
 	_issuerName = _X509_NAME_oneline_utf8(X509_get_issuer_name(_pCert));
 	_subjectName = _X509_NAME_oneline_utf8(X509_get_subject_name(_pCert));
-	BIGNUM* pBN = ASN1_INTEGER_to_BN(X509_get_serialNumber(const_cast<X509*>(_pCert)), 0);
+	BIGNUM* pBN = ASN1_INTEGER_to_BN(X509_get_serialNumber(const_cast<X509 *>(_pCert)), nullptr);
 	if (pBN)
 	{
 		char* pSN = BN_bn2hex(pBN);
@@ -286,8 +283,7 @@ std::string X509Certificate::subjectName(NID nid) const
 void X509Certificate::extractNames(std::string& cmnName, std::set<std::string>& domainNames) const
 {
 	domainNames.clear();
-	if (STACK_OF(GENERAL_NAME)* names = static_cast<STACK_OF(GENERAL_NAME)*>(X509_get_ext_d2i(_pCert, NID_subject_alt_name, 0, 0)))
-	{
+	if (STACK_OF(GENERAL_NAME) *names = static_cast<STACK_OF(GENERAL_NAME) *>( X509_get_ext_d2i(_pCert, NID_subject_alt_name, nullptr, nullptr))) {
 		for (int i = 0; i < sk_GENERAL_NAME_num(names); ++i)
 		{
 			const GENERAL_NAME* name = sk_GENERAL_NAME_value(names, i);
@@ -416,8 +412,9 @@ X509Certificate::List X509Certificate::readPEM(const std::string& pemFileName)
 {
 	List caCertList;
 	BIO* pBIO = BIO_new_file(pemFileName.c_str(), "r");
-	if (pBIO == NULL) throw OpenFileException(Poco::format("X509Certificate::readPEM(%s)", pemFileName));
-	X509* x = PEM_read_bio_X509(pBIO, NULL, 0, NULL);
+	if (pBIO == nullptr)
+		throw OpenFileException(Poco::format("X509Certificate::readPEM(%s)", pemFileName));
+	X509* x = PEM_read_bio_X509(pBIO, nullptr, nullptr, nullptr);
 	if (!x)
 	{
 		BIO_free(pBIO);
@@ -426,7 +423,7 @@ X509Certificate::List X509Certificate::readPEM(const std::string& pemFileName)
 	while (x)
 	{
 		caCertList.push_back(X509Certificate(x));
-		x = PEM_read_bio_X509(pBIO, NULL, 0, NULL);
+		x = PEM_read_bio_X509(pBIO, nullptr, nullptr, nullptr);
 	}
 	BIO_free(pBIO);
 	return caCertList;
@@ -436,7 +433,7 @@ X509Certificate::List X509Certificate::readPEM(const std::string& pemFileName)
 void X509Certificate::writePEM(const std::string& pemFileName, const List& list)
 {
 	BIO* pBIO = BIO_new_file(pemFileName.c_str(), "a");
-	if (pBIO == NULL) throw OpenFileException(Poco::format("X509Certificate::writePEM(%s)", pemFileName));
+	if (pBIO == nullptr) throw OpenFileException(Poco::format("X509Certificate::writePEM(%s)", pemFileName));
 	List::const_iterator it = list.begin();
 	List::const_iterator end = list.end();
 	for (; it != end; ++it)

Crypto/testsuite/src/EVPTest.cpp

@@ -123,7 +123,7 @@ void EVPTest::testRSAEVPPKey()
 
 		BIO* bioPriv1 = BIO_new(BIO_s_mem());
 		BIO* bioPub1 = BIO_new(BIO_s_mem());
-		assertTrue (0 != PEM_write_bio_PrivateKey(bioPriv1, *pKey, NULL, NULL, 0, 0, NULL));
+		assertTrue (0 != PEM_write_bio_PrivateKey(bioPriv1, *pKey, nullptr, nullptr, 0, nullptr, nullptr));
 		assertTrue (0 != PEM_write_bio_PUBKEY(bioPub1, *pKey));
 		char* pPrivData1;
 		long sizePriv1 = BIO_get_mem_data(bioPriv1, &pPrivData1);
@@ -138,7 +138,7 @@ void EVPTest::testRSAEVPPKey()
 
 		BIO* bioPriv2 = BIO_new(BIO_s_mem());
 		BIO* bioPub2 = BIO_new(BIO_s_mem());
-		assertTrue (0 != PEM_write_bio_PrivateKey(bioPriv2, evpPKey, NULL, NULL, 0, 0, NULL));
+		assertTrue ( 0 != PEM_write_bio_PrivateKey(bioPriv2, evpPKey, nullptr, nullptr, 0, nullptr, nullptr));
 		assertTrue (0 != PEM_write_bio_PUBKEY(bioPub2, evpPKey));
 		char* pPrivData2;
 		long sizePriv2 = BIO_get_mem_data(bioPriv2, &pPrivData2);
@@ -158,7 +158,7 @@ void EVPTest::testRSAEVPPKey()
 		assertTrue (evpPKey2.type() == EVP_PKEY_RSA);
 		bioPriv2 = BIO_new(BIO_s_mem());
 		bioPub2 = BIO_new(BIO_s_mem());
-		assertTrue (0 != PEM_write_bio_PrivateKey(bioPriv2, evpPKey2, NULL, NULL, 0, 0, NULL));
+		assertTrue (0 != PEM_write_bio_PrivateKey(bioPriv2, evpPKey2, nullptr, nullptr, 0, nullptr, nullptr));
 		assertTrue (0 != PEM_write_bio_PUBKEY(bioPub2, evpPKey2));
 		sizePriv2 = BIO_get_mem_data(bioPriv2, &pPrivData2);
 		sizePub2 = BIO_get_mem_data(bioPub2, &pPubData2);
@@ -176,7 +176,7 @@ void EVPTest::testRSAEVPPKey()
 		assertTrue (evpPKey3.type() == EVP_PKEY_RSA);
 		bioPriv2 = BIO_new(BIO_s_mem());
 		bioPub2 = BIO_new(BIO_s_mem());
-		assertTrue (0 != PEM_write_bio_PrivateKey(bioPriv2, evpPKey3, NULL, NULL, 0, 0, NULL));
+		assertTrue (0 != PEM_write_bio_PrivateKey(bioPriv2, evpPKey3, nullptr, nullptr, 0, nullptr, nullptr));
 		assertTrue (0 != PEM_write_bio_PUBKEY(bioPub2, evpPKey3));
 		sizePriv2 = BIO_get_mem_data(bioPriv2, &pPrivData2);
 		sizePub2 = BIO_get_mem_data(bioPub2, &pPubData2);
@@ -229,7 +229,7 @@ void EVPTest::testRSAEVPSaveLoadStream()
 	assertTrue (strPub2.str() == pubKey);
 
 	std::istringstream iPriv2(strPriv2.str());
-	EVPPKey key3(0, &iPriv2,  "testpwd");
+	EVPPKey key3(nullptr, &iPriv2, "testpwd");
 	std::ostringstream strPub3;
 	key3.save(&strPub3);
 	assertTrue (strPub3.str() == pubKey);
@@ -261,7 +261,7 @@ void EVPTest::testRSAEVPSaveLoadStreamNoPass()
 	assertTrue (!(key2 == keyNE));
 
 	std::istringstream iPriv2(privKey);
-	EVPPKey key3(0, &iPriv2);
+	EVPPKey key3(nullptr, &iPriv2);
 	std::ostringstream strPub3;
 	key3.save(&strPub3);
 	std::string pubFromPrivate = strPub3.str();
@@ -277,7 +277,7 @@ void EVPTest::testECEVPPKey()
 		if (!curveName.empty())
 		{
 			EVPPKey* pKey = new EVPPKey(curveName);
-			assertTrue (pKey != 0);
+			assertTrue(pKey != nullptr);
 			assertTrue (!pKey->isSupported(0));
 			assertTrue (!pKey->isSupported(-1));
 			assertTrue (pKey->isSupported(pKey->type()));
@@ -285,7 +285,7 @@ void EVPTest::testECEVPPKey()
 
 			BIO* bioPriv1 = BIO_new(BIO_s_mem());
 			BIO* bioPub1 = BIO_new(BIO_s_mem());
-			assertTrue (0 != PEM_write_bio_PrivateKey(bioPriv1, *pKey, NULL, NULL, 0, 0, NULL));
+			assertTrue (0 != PEM_write_bio_PrivateKey(bioPriv1, *pKey, nullptr, nullptr, 0, nullptr, nullptr));
 			assertTrue (0 != PEM_write_bio_PUBKEY(bioPub1, *pKey));
 			char* pPrivData1;
 			long sizePriv1 = BIO_get_mem_data(bioPriv1, &pPrivData1);
@@ -300,7 +300,7 @@ void EVPTest::testECEVPPKey()
 
 			BIO* bioPriv2 = BIO_new(BIO_s_mem());
 			BIO* bioPub2 = BIO_new(BIO_s_mem());
-			assertTrue (0 != PEM_write_bio_PrivateKey(bioPriv2, evpPKey, NULL, NULL, 0, 0, NULL));
+			assertTrue (0 != PEM_write_bio_PrivateKey(bioPriv2, evpPKey, nullptr, nullptr, 0, nullptr, nullptr));
 			assertTrue (0 != PEM_write_bio_PUBKEY(bioPub2, evpPKey));
 			char* pPrivData2;
 			long sizePriv2 = BIO_get_mem_data(bioPriv2, &pPrivData2);
@@ -320,7 +320,7 @@ void EVPTest::testECEVPPKey()
 			assertTrue (evpPKey2.type() == EVP_PKEY_EC);
 			bioPriv2 = BIO_new(BIO_s_mem());
 			bioPub2 = BIO_new(BIO_s_mem());
-			assertTrue (0 != PEM_write_bio_PrivateKey(bioPriv2, evpPKey2, NULL, NULL, 0, 0, NULL));
+			assertTrue (0 != PEM_write_bio_PrivateKey( bioPriv2, evpPKey2, nullptr, nullptr, 0, nullptr, nullptr));
 			assertTrue (0 != PEM_write_bio_PUBKEY(bioPub2, evpPKey2));
 			sizePriv2 = BIO_get_mem_data(bioPriv2, &pPrivData2);
 			sizePub2 = BIO_get_mem_data(bioPub2, &pPubData2);
@@ -338,7 +338,7 @@ void EVPTest::testECEVPPKey()
 			assertTrue (evpPKey3.type() == EVP_PKEY_EC);
 			bioPriv2 = BIO_new(BIO_s_mem());
 			bioPub2 = BIO_new(BIO_s_mem());
-			assertTrue (0 != PEM_write_bio_PrivateKey(bioPriv2, evpPKey3, NULL, NULL, 0, 0, NULL));
+			assertTrue(0 != PEM_write_bio_PrivateKey( bioPriv2, evpPKey3, nullptr, nullptr, 0, nullptr, nullptr));
 			assertTrue (0 != PEM_write_bio_PUBKEY(bioPub2, evpPKey3));
 			sizePriv2 = BIO_get_mem_data(bioPriv2, &pPrivData2);
 			sizePub2 = BIO_get_mem_data(bioPub2, &pPubData2);
@@ -402,7 +402,7 @@ void EVPTest::testECEVPSaveLoadStream()
 			assertTrue (strPub2.str() == pubKey);
 
 			std::istringstream iPriv2(strPriv2.str());
-			EVPPKey key3(0, &iPriv2,  "testpwd");
+			EVPPKey key3(nullptr, &iPriv2, "testpwd");
 			std::ostringstream strPub3;
 			key3.save(&strPub3);
 			std::string pubFromPrivate = strPub3.str();
@@ -458,7 +458,7 @@ void EVPTest::testECEVPSaveLoadStreamNoPass()
 			assertTrue (strPriv2.str() == privKey);
 
 			std::istringstream iPriv2(privKey);
-			EVPPKey key3(0, &iPriv2);
+			EVPPKey key3(nullptr, &iPriv2);
 			std::ostringstream strPub3;
 			key3.save(&strPub3);
 			std::string pubFromPrivate = strPub3.str();
@@ -577,7 +577,7 @@ void EVPTest::testRSAEVPKeyFromX509()
 	X509Certificate cert(str);
 	EVPPKey publicKey(cert);
 	std::istringstream str2(anyPemRSA);
-	EVPPKey privateKey(0, &str2, "test");
+	EVPPKey privateKey(nullptr, &str2, "test");
 	Cipher::Ptr pCipher = CipherFactory::defaultFactory().createCipher(publicKey);
 	Cipher::Ptr pCipher2 = CipherFactory::defaultFactory().createCipher(privateKey);
 	std::string val("lets do some encryption");
@@ -631,7 +631,7 @@ void EVPTest::testRSAEVPKeyByLength()
 		assertTrue (!(key2 == keyNE));
 
 		std::istringstream iPriv2(privKey);
-		EVPPKey key3(0, &iPriv2);
+		EVPPKey key3(nullptr, &iPriv2);
 		std::ostringstream strPub3;
 		key3.save(&strPub3);
 		std::string pubFromPrivate = strPub3.str();
@@ -672,7 +672,7 @@ void EVPTest::testECEVPKeyByLength()
 		assertTrue (!(key2 == keyNE));
 
 		std::istringstream iPriv2(privKey);
-		EVPPKey key3(0, &iPriv2);
+		EVPPKey key3(nullptr, &iPriv2);
 		std::ostringstream strPub3;
 		key3.save(&strPub3);
 		std::string pubFromPrivate = strPub3.str();

Crypto/testsuite/src/RSATest.cpp

@@ -101,7 +101,7 @@ void RSATest::testNewKeys()
 	RSAKey key2(&iPub, &iPriv, "testpwd");
 
 	std::istringstream iPriv2(privKey);
-	RSAKey key3(0, &iPriv2,  "testpwd");
+	RSAKey key3(nullptr, &iPriv2,  "testpwd");
 	std::ostringstream strPub3;
 	key3.save(&strPub3);
 	std::string pubFromPrivate = strPub3.str();
@@ -124,7 +124,7 @@ void RSATest::testNewKeysNoPassphrase()
 	RSAKey key2(&iPub, &iPriv);
 
 	std::istringstream iPriv2(privKey);
-	RSAKey key3(0, &iPriv2);
+	RSAKey key3(nullptr, &iPriv2);
 	std::ostringstream strPub3;
 	key3.save(&strPub3);
 	std::string pubFromPrivate = strPub3.str();
@@ -269,7 +269,7 @@ void RSATest::testCertificate()
 	X509Certificate cert(str);
 	RSAKey publicKey(cert);
 	std::istringstream str2(anyPem);
-	RSAKey privateKey(0, &str2, "test");
+	RSAKey privateKey(nullptr, &str2, "test");
 	Cipher::Ptr pCipher = CipherFactory::defaultFactory().createCipher(publicKey);
 	Cipher::Ptr pCipher2 = CipherFactory::defaultFactory().createCipher(privateKey);
 	std::string val("lets do some encryption");

DNSSD/Avahi/src/AvahiBrowserImpl.cpp

@@ -205,7 +205,10 @@ BrowseHandle AvahiBrowserImpl::browse(const std::string& regType, const std::str
 	AvahiResponderImpl::ScopedLock lock(_responder);
 
 	AvahiIfIndex ifIndex = networkInterface == 0 ? AVAHI_IF_UNSPEC : networkInterface;
-	AvahiServiceBrowser* browser = avahi_service_browser_new(_responder._avahiClient, ifIndex, AVAHI_PROTO_UNSPEC, regType.c_str(), domain.empty() ? NULL : domain.c_str(), (AvahiLookupFlags) 0, Poco::DNSSD::Avahi::onBrowseReply, this);
+	AvahiServiceBrowser* browser = avahi_service_browser_new(
+		_responder._avahiClient, ifIndex, AVAHI_PROTO_UNSPEC, regType.c_str(),
+		domain.empty() ? nullptr : domain.c_str(), (AvahiLookupFlags) 0, Poco::DNSSD::Avahi::onBrowseReply, this
+	);
 	if (!browser)
 	{
 		int error = avahi_client_errno(_responder._avahiClient);
@@ -235,13 +238,19 @@ BrowseHandle AvahiBrowserImpl::enumerateBrowseDomains(Poco::Int32 networkInterfa
 	AvahiResponderImpl::ScopedLock lock(_responder);
 
 	AvahiIfIndex ifIndex = networkInterface == 0 ? AVAHI_IF_UNSPEC : networkInterface;
-	AvahiDomainBrowser* browser = avahi_domain_browser_new(_responder._avahiClient, ifIndex, AVAHI_PROTO_UNSPEC, NULL, AVAHI_DOMAIN_BROWSER_BROWSE, (AvahiLookupFlags) 0, Poco::DNSSD::Avahi::onEnumerateBrowseDomainsReply, this);
+	AvahiDomainBrowser* browser = avahi_domain_browser_new(
+		_responder._avahiClient, ifIndex, AVAHI_PROTO_UNSPEC, nullptr,
+		AVAHI_DOMAIN_BROWSER_BROWSE, (AvahiLookupFlags) 0, Poco::DNSSD::Avahi::onEnumerateBrowseDomainsReply, this
+	);
 	if (!browser)
 	{
 		int error = avahi_client_errno(_responder._avahiClient);
 		throw Poco::DNSSD::DNSSDException("Failed to enumerate browse domains", AvahiResponderImpl::describeError(error), error);
 	}
-	AvahiDomainBrowser* defaultBrowser = avahi_domain_browser_new(_responder._avahiClient, ifIndex, AVAHI_PROTO_UNSPEC, NULL, AVAHI_DOMAIN_BROWSER_BROWSE_DEFAULT, (AvahiLookupFlags) 0, Poco::DNSSD::Avahi::onEnumerateDefaultBrowseDomainsReply, this);
+	AvahiDomainBrowser* defaultBrowser = avahi_domain_browser_new(
+		_responder._avahiClient, ifIndex, AVAHI_PROTO_UNSPEC, nullptr,
+		AVAHI_DOMAIN_BROWSER_BROWSE_DEFAULT, (AvahiLookupFlags) 0, Poco::DNSSD::Avahi::onEnumerateDefaultBrowseDomainsReply, this
+	);
 	if (!defaultBrowser)
 	{
 		int error = avahi_client_errno(_responder._avahiClient);
@@ -257,13 +266,19 @@ BrowseHandle AvahiBrowserImpl::enumerateRegistrationDomains(Poco::Int32 networkI
 	AvahiResponderImpl::ScopedLock lock(_responder);
 
 	AvahiIfIndex ifIndex = networkInterface == 0 ? AVAHI_IF_UNSPEC : networkInterface;
-	AvahiDomainBrowser* browser = avahi_domain_browser_new(_responder._avahiClient, ifIndex, AVAHI_PROTO_UNSPEC, NULL, AVAHI_DOMAIN_BROWSER_REGISTER, (AvahiLookupFlags) 0, Poco::DNSSD::Avahi::onEnumerateRegistrationDomainsReply, this);
+	AvahiDomainBrowser* browser = avahi_domain_browser_new(
+		_responder._avahiClient, ifIndex, AVAHI_PROTO_UNSPEC, nullptr,
+		AVAHI_DOMAIN_BROWSER_REGISTER, (AvahiLookupFlags) 0, Poco::DNSSD::Avahi::onEnumerateRegistrationDomainsReply, this
+	);
 	if (!browser)
 	{
 		int error = avahi_client_errno(_responder._avahiClient);
 		throw Poco::DNSSD::DNSSDException("Failed to enumerate registration domains", AvahiResponderImpl::describeError(error), error);
 	}
-	AvahiDomainBrowser* defaultBrowser = avahi_domain_browser_new(_responder._avahiClient, ifIndex, AVAHI_PROTO_UNSPEC, NULL, AVAHI_DOMAIN_BROWSER_REGISTER_DEFAULT, (AvahiLookupFlags) 0, Poco::DNSSD::Avahi::onEnumerateDefaultRegistrationDomainsReply, this);
+	AvahiDomainBrowser* defaultBrowser = avahi_domain_browser_new(
+		_responder._avahiClient, ifIndex, AVAHI_PROTO_UNSPEC, nullptr,
+		AVAHI_DOMAIN_BROWSER_REGISTER_DEFAULT, (AvahiLookupFlags) 0, Poco::DNSSD::Avahi::onEnumerateDefaultRegistrationDomainsReply, this
+	);
 	if (!defaultBrowser)
 	{
 		int error = avahi_client_errno(_responder._avahiClient);

DNSSD/Avahi/src/AvahiResponderImpl.cpp

@@ -66,8 +66,8 @@ extern "C" void onGroupStateChange(AvahiEntryGroup* avahiGroup, AvahiEntryGroupS
 AvahiResponderImpl::AvahiResponderImpl(Poco::DNSSD::DNSSDResponder& owner):
 	_owner(owner),
 	_browser(*this),
-	_avahiPoll(0),
-	_avahiClient(0),
+	_avahiPoll(nullptr),
+	_avahiClient(nullptr),
 	_running(false),
 	_nextRecordId(1)
 {
@@ -299,8 +299,8 @@ void AvahiResponderImpl::setupEntryGroup(AvahiEntryGroup* avahiGroup, const Serv
 		}
 		std::string name(service.name());
 		if (name.empty()) name = avahi_client_get_host_name(_avahiClient);
-		const char* domain = service.domain().empty() ? 0 : service.domain().c_str();
-		const char* host = service.host().empty() ? 0 : service.host().c_str();
+		const char* domain = service.domain().empty() ? nullptr : service.domain().c_str();
+		const char* host = service.host().empty() ? nullptr : service.host().c_str();
 
 		int error = rename ? AVAHI_ERR_COLLISION : avahi_entry_group_add_service_strlst(
 			avahiGroup,
@@ -390,7 +390,7 @@ void AvahiResponderImpl::setupEntryGroup(AvahiEntryGroup* avahiGroup, const Serv
 
 AvahiStringList* AvahiResponderImpl::createTXTRecord(const Service::Properties& properties)
 {
-	AvahiStringList* avahiList = 0;
+	AvahiStringList* avahiList = nullptr;
 	Service::Properties::ConstIterator itVers = properties.find("txtvers");
 	Service::Properties::ConstIterator itEnd = properties.end();
 	std::string entry;
@@ -399,7 +399,7 @@ AvahiStringList* AvahiResponderImpl::createTXTRecord(const Service::Properties&
 		std::string entry(itVers->first);
 		entry += '=';
 		entry += itVers->second;
-		avahiList = avahi_string_list_new(entry.c_str(), NULL);
+		avahiList = avahi_string_list_new(entry.c_str(), nullptr);
 	}
 
 	Service::Properties::ConstIterator it = properties.begin();
@@ -409,7 +409,11 @@ AvahiStringList* AvahiResponderImpl::createTXTRecord(const Service::Properties&
 		{
 			if (avahiList)
 			{
-				avahiList = avahi_string_list_add_pair_arbitrary(avahiList, it->first.c_str(), reinterpret_cast<const uint8_t*>(it->second.empty() ? NULL : it->second.c_str()), it->second.size());
+				avahiList = avahi_string_list_add_pair_arbitrary(
+					avahiList, it->first.c_str(), reinterpret_cast<const uint8_t*>(it->second.empty() ?
+					nullptr :
+					it->second.c_str()), it->second.size()
+				);
 			}
 			else
 			{
@@ -419,7 +423,7 @@ AvahiStringList* AvahiResponderImpl::createTXTRecord(const Service::Properties&
 					entry += '=';
 					entry += it->second;
 				}
-				avahiList = avahi_string_list_new(entry.c_str(), NULL);
+				avahiList = avahi_string_list_new(entry.c_str(), nullptr);
 			}
 		}
 	}

DNSSD/Bonjour/src/BonjourBrowserImpl.cpp

@@ -174,7 +174,7 @@ BrowseHandle BonjourBrowserImpl::browse(const std::string& regType, const std::s
 {
 	DNSServiceRef sdRef(nullptr);
 	EventLoop::ScopedLock lock(_eventLoop);
-	DNSServiceErrorType err = DNSServiceBrowse(&sdRef, 0, networkInterface, regType.c_str(), domain.empty() ? 0 : domain.c_str(), Poco::DNSSD::Bonjour::onBrowseReply, this);
+	DNSServiceErrorType err = DNSServiceBrowse(&sdRef, 0, networkInterface, regType.c_str(), domain.empty() ? nullptr : domain.c_str(), Poco::DNSSD::Bonjour::onBrowseReply, this);
 	if (err == kDNSServiceErr_NoError)
 	{
 		_eventLoop.add(sdRef);
@@ -186,7 +186,7 @@ BrowseHandle BonjourBrowserImpl::browse(const std::string& regType, const std::s
 
 BrowseHandle BonjourBrowserImpl::resolve(const Service& service, int options)
 {
-	DNSServiceRef sdRef(0);
+	DNSServiceRef sdRef(nullptr);
 	Poco::Int32 ifIndex = (options & RESOLVE_ON_ALL_INTERFACES) ? 0 : service.networkInterface();
 	EventLoop::ScopedLock lock(_eventLoop);
 	DNSServiceErrorType err = DNSServiceResolve(&sdRef, 0, ifIndex, service.name().c_str(), service.type().c_str(), service.domain().c_str(), Poco::DNSSD::Bonjour::onResolveReply, this);
@@ -202,7 +202,7 @@ BrowseHandle BonjourBrowserImpl::resolve(const Service& service, int options)
 
 BrowseHandle BonjourBrowserImpl::enumerateBrowseDomains(Poco::Int32 networkInterface)
 {
-	DNSServiceRef sdRef(0);
+	DNSServiceRef sdRef(nullptr);
 	EventLoop::ScopedLock lock(_eventLoop);
 	DNSServiceErrorType err = DNSServiceEnumerateDomains(&sdRef, kDNSServiceFlagsBrowseDomains, networkInterface, Poco::DNSSD::Bonjour::onEnumerateBrowseDomainsReply, this);
 	if (err == kDNSServiceErr_NoError)
@@ -216,7 +216,7 @@ BrowseHandle BonjourBrowserImpl::enumerateBrowseDomains(Poco::Int32 networkInter
 
 BrowseHandle BonjourBrowserImpl::enumerateRegistrationDomains(Poco::Int32 networkInterface)
 {
-	DNSServiceRef sdRef(0);
+	DNSServiceRef sdRef(nullptr);
 	EventLoop::ScopedLock lock(_eventLoop);
 	DNSServiceErrorType err = DNSServiceEnumerateDomains(&sdRef, kDNSServiceFlagsRegistrationDomains, networkInterface, Poco::DNSSD::Bonjour::onEnumerateRegistrationDomainsReply, this);
 	if (err == kDNSServiceErr_NoError)
@@ -247,7 +247,7 @@ BrowseHandle BonjourBrowserImpl::queryRecord(const std::string& name, Poco::UInt
 
 BrowseHandle BonjourBrowserImpl::resolveHost(const std::string& host, int options, Poco::Int32 networkInterface)
 {
-	DNSServiceRef sdRef(0);
+	DNSServiceRef sdRef(nullptr);
 	DNSServiceFlags flags(0);
 	if (options & BROWSE_FORCE_MULTICAST) flags |= kDNSServiceFlagsForceMulticast;
 	EventLoop::ScopedLock lock(_eventLoop);

DNSSD/Bonjour/src/BonjourResponderImpl.cpp

@@ -85,7 +85,13 @@ ServiceHandle BonjourResponderImpl::registerService(const Service& service, int
 	if (options & DNSSDResponder::REG_NON_BROWSABLE) flags |= kDNSServiceFlagsNonBrowsable;
 #endif
 	std::string txtRecord = createTXTRecord(service.properties());
-	DNSServiceErrorType err = DNSServiceRegister(&sdRef, flags, intf, service.name().empty() ? 0 : service.name().c_str(), service.type().c_str(), service.domain().empty() ? 0 : service.domain().c_str(), service.host().empty() ? 0 : service.host().c_str(), Poco::ByteOrder::toNetwork(service.port()), txtRecord.size(), txtRecord.empty() ? 0 : txtRecord.data(), Poco::DNSSD::Bonjour::onRegisterServiceReply, this);
+	DNSServiceErrorType err = DNSServiceRegister(
+		&sdRef, flags, intf,
+		service.name().empty() ? nullptr : service.name().c_str(),
+		service.type().c_str(), service.domain().empty() ? nullptr : service.domain().c_str(),
+		service.host().empty() ? nullptr : service.host().c_str(),
+		Poco::ByteOrder::toNetwork(service.port()), txtRecord.size(), txtRecord.empty() ? nullptr : txtRecord.data(),
+		Poco::DNSSD::Bonjour::onRegisterServiceReply, this);
 	if (err == kDNSServiceErr_NoError)
 	{
 		_eventLoop.add(sdRef);
@@ -105,7 +111,7 @@ void BonjourResponderImpl::unregisterService(ServiceHandle& serviceHandle)
 
 RecordHandle BonjourResponderImpl::addRecord(ServiceHandle serviceHandle, const Record& record)
 {
-	DNSRecordRef recRef(0);
+	DNSRecordRef recRef(nullptr);
 	EventLoop::ScopedLock lock(_eventLoop);
 	DNSServiceErrorType err = DNSServiceAddRecord(serviceHandle.cast<DNSServiceRef>(), &recRef, 0, record.type(), record.length(), record.data(), record.ttl());
 	if (err == kDNSServiceErr_NoError)
@@ -119,7 +125,9 @@ RecordHandle BonjourResponderImpl::addRecord(ServiceHandle serviceHandle, const
 void BonjourResponderImpl::updateRecord(ServiceHandle serviceHandle, RecordHandle recordHandle, const Record& record)
 {
 	EventLoop::ScopedLock lock(_eventLoop);
-	DNSServiceErrorType err = DNSServiceUpdateRecord(serviceHandle.cast<DNSServiceRef>(), recordHandle.cast<DNSRecordRef>(), 0, record.length(), record.data(), record.ttl());
+	DNSServiceErrorType err = DNSServiceUpdateRecord(
+		serviceHandle.cast<DNSServiceRef>(), recordHandle.cast<DNSRecordRef>(), 0,
+		record.length(), record.data(), record.ttl());
 	if (err != kDNSServiceErr_NoError)
 	{
 		throw Poco::DNSSD::DNSSDException("Failed to update record " + record.name(), describeError(err), err);
@@ -268,7 +276,7 @@ std::string BonjourResponderImpl::createTXTRecord(const Service::Properties& pro
 	if (itVers != itEnd)
 	{
 		Poco::UInt8 valueSize = static_cast<Poco::UInt8>(itVers->second.size());
-		TXTRecordSetValue(&ref, itVers->first.c_str(), valueSize, valueSize == 0 ? 0 : itVers->second.c_str());
+		TXTRecordSetValue(&ref, itVers->first.c_str(), valueSize, valueSize == 0 ? nullptr : itVers->second.c_str());
 	}
 
 	it = properties.begin();
@@ -277,7 +285,7 @@ std::string BonjourResponderImpl::createTXTRecord(const Service::Properties& pro
 		if (it != itVers)
 		{
 			Poco::UInt8 valueSize = static_cast<Poco::UInt8>(it->second.size());
-			TXTRecordSetValue(&ref, it->first.c_str(), valueSize, valueSize == 0 ? 0 : it->second.c_str());
+			TXTRecordSetValue(&ref, it->first.c_str(), valueSize, valueSize == 0 ? nullptr : it->second.c_str());
 		}
 	}
 	const void* txtRecord = TXTRecordGetBytesPtr(&ref);

DNSSD/samples/HTTPTimeServer/src/HTTPTimeServer.cpp

@@ -108,7 +108,7 @@ public:
 		if (request.getURI() == "/")
 			return new TimeRequestHandler(_format);
 		else
-			return 0;
+			return nullptr;
 	}
 
 private:

DNSSD/src/DNSSDResponder.cpp

@@ -23,11 +23,11 @@ namespace Poco {
 namespace DNSSD {
 
 
-DNSSDResponderImplFactory* DNSSDResponder::_pImplFactory(0);
+DNSSDResponderImplFactory* DNSSDResponder::_pImplFactory(nullptr);
 
 
 DNSSDResponder::DNSSDResponder():
-	_pImpl(0)
+	_pImpl(nullptr)
 {
 	if (_pImplFactory)
 	{
@@ -102,7 +102,7 @@ void DNSSDResponder::registerImplFactory(DNSSDResponderImplFactory& factory)
 
 void DNSSDResponder::unregisterImplFactory()
 {
-	_pImplFactory = 0;
+	_pImplFactory = nullptr;
 }
 
 

DNSSD/src/Record.cpp

@@ -26,7 +26,7 @@ Record::Record():
 	_type(0),
 	_clazz(0),
 	_length(0),
-	_data(0),
+	_data(nullptr),
 	_ttl(0)
 {
 }

Data/MySQL/include/Poco/Data/MySQL/SessionHandle.h

@@ -37,7 +37,7 @@ public:
 	~SessionHandle();
 		/// Destroy handle, close connection
 
-	void init(MYSQL* mysql = 0);
+	void init(MYSQL* mysql = nullptr);
 		/// Initializes the handle iff not initialized.
 
 	void options(mysql_option opt);

Data/MySQL/src/Binder.cpp

@@ -30,7 +30,7 @@ Binder::~Binder()
 	for (std::vector<MYSQL_TIME*>::iterator it = _dates.begin(); it != _dates.end(); ++it)
 	{
 		delete *it;
-		*it = 0;
+		*it = nullptr;
 	}
 }
 
@@ -220,7 +220,7 @@ void Binder::bind(std::size_t pos, const UUID& val, Direction dir)
 void Binder::bind(std::size_t pos, const NullData&, Direction dir)
 {
 	poco_assert(dir == PD_IN);
-	realBind(pos, MYSQL_TYPE_NULL, 0, 0);
+	realBind(pos, MYSQL_TYPE_NULL, nullptr, 0);
 }
 
 
@@ -234,7 +234,7 @@ MYSQL_BIND* Binder::getBindArray() const
 {
 	if (_bindArray.size() == 0)
 	{
-		return 0;
+		return nullptr;
 	}
 
 	return const_cast<MYSQL_BIND*>(&_bindArray[0]);
@@ -286,7 +286,7 @@ void Binder::realBind(std::size_t pos, enum_field_types type, const void* buffer
 		std::memset(&_bindArray[s], 0, sizeof(MYSQL_BIND) * (_bindArray.size() - s));
 	}
 
-	MYSQL_BIND b = {0};
+	MYSQL_BIND b = {nullptr};
 
 	b.buffer_type   = type;
 	b.buffer  = const_cast<void*>(buffer);

Data/MySQL/src/Connector.cpp

@@ -52,7 +52,7 @@ Poco::AutoPtr<Poco::Data::SessionImpl> Connector::createSession(const std::strin
 
 void Connector::registerConnector()
 {
-	if (mysql_library_init(0, 0, 0) != 0)
+	if (mysql_library_init(0, nullptr, nullptr) != 0)
 	{
 		throw Exception("mysql_library_init error");
 	}

Data/MySQL/src/Extractor.cpp

@@ -265,7 +265,7 @@ void Extractor::reset()
 
 bool Extractor::realExtractFixed(std::size_t pos, enum_field_types type, void* buffer, bool isUnsigned)
 {
-	MYSQL_BIND bind = {0};
+	MYSQL_BIND bind = {nullptr};
 	my_bool isNull = 0;
 
 	bind.is_null     = &isNull;

Data/MySQL/src/MySQLException.cpp

@@ -116,7 +116,7 @@ std::string StatementException::compose(const std::string& text, MYSQL_STMT* h,
 	str += "[Comment]: ";
 	str += text;
 
-	if (h != 0)
+	if (h != nullptr)
 	{
 		str += "\t[mysql_stmt_error]: ";
 		str += mysql_stmt_error(h);

Data/MySQL/src/SessionHandle.cpp

@@ -67,7 +67,7 @@ private:
 #endif
 
 
-SessionHandle::SessionHandle(MYSQL* mysql): _pHandle(0)
+SessionHandle::SessionHandle(MYSQL* mysql): _pHandle(nullptr)
 {
 	init(mysql);
 #ifdef POCO_OS_FAMILY_UNIX
@@ -95,7 +95,7 @@ SessionHandle::~SessionHandle()
 
 void SessionHandle::options(mysql_option opt)
 {
-	if (mysql_options(_pHandle, opt, 0) != 0)
+	if (mysql_options(_pHandle, opt, nullptr) != 0)
 		throw ConnectionException("mysql_options error", _pHandle);
 }
 
@@ -130,7 +130,7 @@ void SessionHandle::options(mysql_option opt, unsigned int i)
 void SessionHandle::connect(const char* host, const char* user, const char* password, const char* db, unsigned int port)
 {
 #ifdef HAVE_MYSQL_REAL_CONNECT
-	if (!mysql_real_connect(_pHandle, host, user, password, db, port, 0, 0))
+	if (!mysql_real_connect(_pHandle, host, user, password, db, port, nullptr, 0))
 		throw ConnectionFailedException(mysql_error(_pHandle));
 #else
 	if (!mysql_connect(_pHandle, host, user, password))
@@ -144,7 +144,7 @@ void SessionHandle::close()
 	if (_pHandle)
 	{
 		mysql_close(_pHandle);
-		_pHandle = 0;
+		_pHandle = nullptr;
 	}
 }
 

Data/MySQL/src/SessionImpl.cpp

@@ -48,7 +48,7 @@ const std::string SessionImpl::MYSQL_SERIALIZABLE = "SERIALIZABLE";
 SessionImpl::SessionImpl(const std::string& connectionString, std::size_t loginTimeout) :
 	Poco::Data::AbstractSessionImpl<SessionImpl>(connectionString, loginTimeout),
 	_connector("MySQL"),
-	_handle(0),
+	_handle(nullptr),
 	_reset(false),
 	_connected(false),
 	_inTransaction(false),
@@ -120,7 +120,7 @@ void SessionImpl::open(const std::string& connect)
 	if (options["user"].empty())
 		throw MySQLException("create session: specify user name");
 
-	const char * db = NULL;
+	const char * db = nullptr;
 	if (!options["db"].empty())
 		db = options["db"].c_str();
 

Data/MySQL/src/StatementExecutor.cpp

@@ -76,7 +76,7 @@ void StatementExecutor::bindParams(MYSQL_BIND* params, std::size_t count)
 		throw StatementException("Statement is not compiled yet");
 
 	if (count != mysql_stmt_param_count(_pHandle))
-		throw StatementException("wrong bind parameters count", 0, _query);
+		throw StatementException("wrong bind parameters count", nullptr, _query);
 
 	if (count == 0) return;
 

Data/MySQL/testsuite/src/MySQLTest.cpp

@@ -37,8 +37,8 @@ using Poco::Nullable;
 using Poco::Tuple;
 using Poco::NamedTuple;
 
-Poco::SharedPtr<Poco::Data::Session> MySQLTest::_pSession = 0;
-Poco::SharedPtr<SQLExecutor> MySQLTest::_pExecutor = 0;
+Poco::SharedPtr<Poco::Data::Session> MySQLTest::_pSession = nullptr;
+Poco::SharedPtr<SQLExecutor> MySQLTest::_pExecutor = nullptr;
 
 //
 // Parameters for barebone-test
@@ -936,7 +936,7 @@ CppUnit::Test* MySQLTest::suite()
 		catch (ConnectionFailedException& ex)
 		{
 			std::cout << ex.displayText() << std::endl;
-			return 0;
+			return nullptr;
 		}
 	}
 

Data/MySQL/testsuite/src/SQLExecutor.cpp

@@ -158,14 +158,14 @@ SQLExecutor::~SQLExecutor()
 void SQLExecutor::bareboneMySQLTest(const char* host, const char* user, const char* pwd, const char* db, int port, const char* tableCreateString)
 {
 	int rc;
-	MYSQL* hsession = mysql_init(0);
-	assertTrue (hsession != 0);
+	MYSQL* hsession = mysql_init(nullptr);
+	assertTrue (hsession != nullptr);
 
-	MYSQL* tmp = mysql_real_connect(hsession, host, user, pwd, db, port, 0, 0);
+	MYSQL* tmp = mysql_real_connect(hsession, host, user, pwd, db, port, nullptr, 0);
 	assertTrue (tmp == hsession);
 
 	MYSQL_STMT* hstmt = mysql_stmt_init(hsession);
-	assertTrue (hstmt != 0);
+	assertTrue (hstmt != nullptr);
 
 	std::string sql = "DROP TABLE Test";
 	mysql_real_query(hsession, sql.c_str(), static_cast<unsigned long>(sql.length()));
@@ -185,7 +185,7 @@ void SQLExecutor::bareboneMySQLTest(const char* host, const char* user, const ch
 	int fourth = 4;
 	float fifth = 1.5;
 
-	MYSQL_BIND bind_param[5] = {{0}};
+	MYSQL_BIND bind_param[5] = {{nullptr}};
 
 	bind_param[0].buffer		= const_cast<char*>(str[0].c_str());
 	bind_param[0].buffer_length = static_cast<unsigned long>(str[0].length());
@@ -225,7 +225,7 @@ void SQLExecutor::bareboneMySQLTest(const char* host, const char* user, const ch
 	fourth = 0;
 	fifth = 0.0f;
 
-	MYSQL_BIND bind_result[5] = {{0}};
+	MYSQL_BIND bind_result[5] = {{nullptr}};
 
 	bind_result[0].buffer		= chr[0];
 	bind_result[0].buffer_length = sizeof(chr[0]);

Data/ODBC/include/Poco/Data/ODBC/Binder.h

@@ -71,7 +71,7 @@ public:
 	Binder(const StatementHandle& rStmt,
 		std::size_t maxFieldSize,
 		ParameterBinding dataBinding = PB_IMMEDIATE,
-		const TypeInfo* pDataTypes = 0,
+		const TypeInfo* pDataTypes = nullptr,
 		Poco::TextEncoding::Ptr pFromEncoding = nullptr,
 		Poco::TextEncoding::Ptr pDBEncoding = nullptr);
 		/// Creates the Binder.
@@ -427,7 +427,7 @@ private:
 
 		getColSizeAndPrecision(pos, cDataType, colSize, decDigits);
 
-		_lengthIndicator.push_back(0);
+		_lengthIndicator.push_back(nullptr);
 
 		if (Utility::isError(SQLBindParameter(_rStmt,
 			(SQLUSMALLINT) pos + 1,
@@ -436,7 +436,7 @@ private:
 			Utility::sqlDataType(cDataType),
 			colSize,
 			decDigits,
-			(SQLPOINTER) &val, 0, 0)))
+			(SQLPOINTER) &val, 0, nullptr)))
 		{
 			throw StatementException(_rStmt, "ODBC::Binder::SQLBindParameter()");
 		}
@@ -492,7 +492,7 @@ private:
 
 		if (_vecLengthIndicator.size() <= pos)
 		{
-			_vecLengthIndicator.resize(pos + 1, 0);
+			_vecLengthIndicator.resize(pos + 1, nullptr);
 			_vecLengthIndicator[pos] = new LengthVec(length);
 		}
 
@@ -544,7 +544,7 @@ private:
 
 		if (_vecLengthIndicator.size() <= pos)
 		{
-			_vecLengthIndicator.resize(pos + 1, 0);
+			_vecLengthIndicator.resize(pos + 1, nullptr);
 			_vecLengthIndicator[pos] = new LengthVec(length);
 		}
 
@@ -582,7 +582,7 @@ private:
 		if (PB_IMMEDIATE != _paramBinding)
 			throw InvalidAccessException("Containers can only be bound immediately.");
 
-		const C* pVal = 0;
+		const C* pVal = nullptr;
 		if (!transcodeRequired()) pVal = &valC;
 		else
 		{
@@ -614,12 +614,12 @@ private:
 
 		if (_vecLengthIndicator.size() <= pos)
 		{
-			_vecLengthIndicator.resize(pos + 1, 0);
+			_vecLengthIndicator.resize(pos + 1, nullptr);
 			_vecLengthIndicator[pos] = new LengthVec(length ? length : 1, SQL_NTS);
 		}
 
 		if (_charPtrs.size() <= pos)
-			_charPtrs.resize(pos + 1, 0);
+			_charPtrs.resize(pos + 1, nullptr);
 
 		_charPtrs[pos] = (char*) std::calloc(pVal->size() * size, sizeof(char));
 
@@ -685,12 +685,12 @@ private:
 
 		if (_vecLengthIndicator.size() <= pos)
 		{
-			_vecLengthIndicator.resize(pos + 1, 0);
+			_vecLengthIndicator.resize(pos + 1, nullptr);
 			_vecLengthIndicator[pos] = new LengthVec(length ? length : 1, SQL_NTS);
 		}
 
 		if (_utf16CharPtrs.size() <= pos)
-			_utf16CharPtrs.resize(pos + 1, 0);
+			_utf16CharPtrs.resize(pos + 1, nullptr);
 
 		_utf16CharPtrs[pos] = (UTF16Char*)std::calloc(val.size() * size, sizeof(UTF16Char));
 
@@ -745,7 +745,7 @@ private:
 
 		if (_vecLengthIndicator.size() <= pos)
 		{
-			_vecLengthIndicator.resize(pos + 1, 0);
+			_vecLengthIndicator.resize(pos + 1, nullptr);
 			_vecLengthIndicator[pos] = new LengthVec(length ? length : 1);
 		}
 
@@ -760,7 +760,7 @@ private:
 		}
 
 		if (_charPtrs.size() <= pos)
-			_charPtrs.resize(pos + 1, 0);
+			_charPtrs.resize(pos + 1, nullptr);
 
 		_charPtrs[pos] = (char*) std::calloc(val.size() * size, sizeof(CharType));
 		poco_check_ptr (_charPtrs[pos]);
@@ -811,13 +811,13 @@ private:
 
 		if (_vecLengthIndicator.size() <= pos)
 		{
-			_vecLengthIndicator.resize(pos + 1, 0);
+			_vecLengthIndicator.resize(pos + 1, nullptr);
 			_vecLengthIndicator[pos] = new LengthVec(length ? length : 1);
 		}
 
 		if (_dateVecVec.size() <= pos)
 		{
-			_dateVecVec.resize(pos + 1, 0);
+			_dateVecVec.resize(pos + 1, nullptr);
 			_dateVecVec[pos] = new DateVec(length ? length : 1);
 		}
 
@@ -859,13 +859,13 @@ private:
 
 		if (_vecLengthIndicator.size() <= pos)
 		{
-			_vecLengthIndicator.resize(pos + 1, 0);
+			_vecLengthIndicator.resize(pos + 1, nullptr);
 			_vecLengthIndicator[pos] = new LengthVec(length ? length : 1);
 		}
 
 		if (_timeVecVec.size() <= pos)
 		{
-			_timeVecVec.resize(pos + 1, 0);
+			_timeVecVec.resize(pos + 1, nullptr);
 			_timeVecVec[pos] = new TimeVec(length ? length : 1);
 		}
 
@@ -908,13 +908,13 @@ private:
 
 		if (_vecLengthIndicator.size() <= pos)
 		{
-			_vecLengthIndicator.resize(pos + 1, 0);
+			_vecLengthIndicator.resize(pos + 1, nullptr);
 			_vecLengthIndicator[pos] = new LengthVec(length ? length : 1);
 		}
 
 		if (_dateTimeVecVec.size() <= pos)
 		{
-			_dateTimeVecVec.resize(pos + 1, 0);
+			_dateTimeVecVec.resize(pos + 1, nullptr);
 			_dateTimeVecVec[pos] = new DateTimeVec(length ? length : 1);
 		}
 
@@ -958,12 +958,12 @@ private:
 		SQLINTEGER size = 16; // UUID is fixed 16 bytes
 		if (_vecLengthIndicator.size() <= pos)
 		{
-			_vecLengthIndicator.resize(pos + 1, 0);
+			_vecLengthIndicator.resize(pos + 1, nullptr);
 			_vecLengthIndicator[pos] = new LengthVec(length ? length : 1, size);
 		}
 
 		if (_charPtrs.size() <= pos)
-			_charPtrs.resize(pos + 1, 0);
+			_charPtrs.resize(pos + 1, nullptr);
 
 		_charPtrs[pos] = (char*)std::calloc(val.size() * size, sizeof(char));
 		std::size_t offset = 0;
@@ -1015,7 +1015,7 @@ private:
 
 		if (_vecLengthIndicator.size() <= pos)
 		{
-			_vecLengthIndicator.resize(pos + 1, 0);
+			_vecLengthIndicator.resize(pos + 1, nullptr);
 			_vecLengthIndicator[pos] = new LengthVec(length, SQL_NULL_DATA);
 		}
 
@@ -1030,7 +1030,7 @@ private:
 			TypeInfo::sqlDataType<SQL_C_CHAR>(),
 			colSize,
 			decDigits,
-			0,
+			nullptr,
 			0,
 			&(*_vecLengthIndicator[pos])[0])))
 		{
@@ -1057,7 +1057,7 @@ private:
 
 		if (_vecLengthIndicator.size() <= pos)
 		{
-			_vecLengthIndicator.resize(pos + 1, 0);
+			_vecLengthIndicator.resize(pos + 1, nullptr);
 			_vecLengthIndicator[pos] = new LengthVec(length, SQL_NULL_DATA);
 			auto valIt = val.begin(), valEnd = val.end();
 			auto lenIt = _vecLengthIndicator[pos]->begin(), lenEnd = _vecLengthIndicator[pos]->end();
@@ -1080,7 +1080,7 @@ private:
 			TypeInfo::sqlDataType<SQL_C_CHAR>(),
 			colSize,
 			decDigits,
-			0,
+			nullptr,
 			0,
 			&(*_vecLengthIndicator[pos])[0])))
 		{

Data/ODBC/include/Poco/Data/ODBC/Handle.h

@@ -41,7 +41,7 @@ class Handle
 public:
 	Handle(const ConnectionHandle& rConnection):
 		_rConnection(rConnection),
-		_handle(0)
+		_handle(nullptr)
 			/// Creates the Handle.
 	{
 		if (Utility::isError(SQLAllocHandle(handleType,

Data/ODBC/include/Poco/Data/ODBC/Preparator.h

@@ -428,7 +428,7 @@ private:
 	Preparator& operator = (const Preparator&);
 
 	template <typename C>
-	void prepareImpl(std::size_t pos, const C* pVal = 0)
+	void prepareImpl(std::size_t pos, const C* pVal = nullptr)
 		/// Utility function to prepare Any and Dynamic::Var.
 	{
 		ODBCMetaColumn col(_rStmt, pos);

Data/ODBC/include/Poco/Data/ODBC/TypeInfo.h

@@ -70,7 +70,7 @@ public:
 		SQLSMALLINT> TypeInfoTup;
 	typedef std::vector<TypeInfoTup> TypeInfoVec;
 
-	explicit TypeInfo(SQLHDBC* pHDBC=0);
+	explicit TypeInfo(SQLHDBC* pHDBC=nullptr);
 		/// Creates the TypeInfo.
 
 	~TypeInfo();

Data/ODBC/src/Binder.cpp

@@ -114,7 +114,7 @@ void Binder::freeMemory()
 
 void Binder::bind(std::size_t pos, const std::string& val, Direction dir)
 {
-	char* pTCVal = 0;
+	char* pTCVal = nullptr;
 	SQLINTEGER size = 0;
 	if (transcodeRequired())
 	{
@@ -125,7 +125,7 @@ void Binder::bind(std::size_t pos, const std::string& val, Direction dir)
 		std::memcpy(pTCVal, tcVal.data(), size);
 	}
 	else size = static_cast<SQLINTEGER>(val.size());
-	SQLPOINTER pVal = 0;
+	SQLPOINTER pVal = nullptr;
 	SQLINTEGER colSize = 0;
 	SQLSMALLINT decDigits = 0;
 	getColSizeAndPrecision(pos, SQL_C_CHAR, colSize, decDigits, val.size());
@@ -183,7 +183,7 @@ void Binder::bind(std::size_t pos, const UTF16String& val, Direction dir)
 {
 	typedef UTF16String::value_type CharT;
 
-	SQLPOINTER pVal = 0;
+	SQLPOINTER pVal = nullptr;
 	SQLINTEGER size = (SQLINTEGER)(val.size() * sizeof(CharT));
 	SQLINTEGER colSize = 0;
 	SQLSMALLINT decDigits = 0;
@@ -366,7 +366,7 @@ void Binder::bind(std::size_t pos, const NullData& val, Direction dir)
 	if (isOutBound(dir) || !isInBound(dir))
 		throw NotImplementedException("NULL parameter type can only be inbound.");
 
-	_inParams.insert(ParamMap::value_type(SQLPOINTER(0), SQLINTEGER(0)));
+	_inParams.insert(ParamMap::value_type(SQLPOINTER(nullptr), SQLINTEGER(0)));
 
 	SQLLEN* pLenIn = new SQLLEN;
 	*pLenIn  = SQL_NULL_DATA;
@@ -384,7 +384,7 @@ void Binder::bind(std::size_t pos, const NullData& val, Direction dir)
 		TypeInfo::sqlDataType<SQL_C_CHAR>(),
 		colSize,
 		decDigits,
-		0,
+		nullptr,
 		0,
 		_lengthIndicator.back())))
 	{

Data/ODBC/src/Extractor.cpp

@@ -72,7 +72,7 @@ bool Extractor::extractBoundImpl<UTF16String>(std::size_t pos, UTF16String& val)
 	typedef UTF16String::value_type CharT;
 	if (isNull(pos)) return false;
 	std::size_t dataSize = _pPreparator->actualDataSize(pos);
-	CharT* sp = 0;
+	CharT* sp = nullptr;
 	UTF16String us;
 	const std::type_info& ti = _pPreparator->at(pos).type();
 	if (ti == typeid(CharT*))

Data/ODBC/src/ODBCMetaColumn.cpp

@@ -64,9 +64,9 @@ bool ODBCMetaColumn::isUnsigned() const
 	if (Utility::isError(Poco::Data::ODBC::SQLColAttribute(_rStmt,
 		(SQLUSMALLINT)position() + 1, // ODBC columns are 1-based
 		SQL_DESC_UNSIGNED,
+		nullptr,
 		0,
-		0,
-		0,
+		nullptr,
 		&val)))
 	{
 		throw StatementException(_rStmt, "ODBCMetaColumn::isUnsigned()");
@@ -82,9 +82,9 @@ void ODBCMetaColumn::init()
 	if (Utility::isError(Poco::Data::ODBC::SQLColAttribute(_rStmt,
 			(SQLUSMALLINT) position() + 1, // ODBC columns are 1-based
 			SQL_DESC_LENGTH,
+			nullptr,
 			0,
-			0,
-			0,
+			nullptr,
 			&_dataLength)))
 	{
 		throw StatementException(_rStmt, "ODBCMetaColumn::init()");

Data/ODBC/src/ODBCStatementImpl.cpp

@@ -92,7 +92,7 @@ void ODBCStatementImpl::compileImpl()
 	Binder::ParameterBinding bind = session().getFeature("autoBind") ?
 		Binder::PB_IMMEDIATE : Binder::PB_AT_EXEC;
 
-	const TypeInfo* pDT = 0;
+	const TypeInfo* pDT = nullptr;
 	try
 	{
 		Poco::Any dti = session().getProperty("dataTypeInfo");
@@ -194,7 +194,7 @@ void ODBCStatementImpl::doPrepare()
 					"SQLSetStmtAttr(SQL_ATTR_ROW_ARRAY_SIZE)");
 		}
 
-		AbstractPreparation::Ptr pAP = 0;
+		AbstractPreparation::Ptr pAP = nullptr;
 		Poco::Data::AbstractPreparator::Ptr pP = _preparations[curDataSet];
 		for (std::size_t pos = 0; it != itEnd; ++it)
 		{
@@ -295,7 +295,7 @@ void ODBCStatementImpl::execDirectImpl(const std::string& query)
 
 void ODBCStatementImpl::putData()
 {
-	SQLPOINTER pParam = 0;
+	SQLPOINTER pParam = nullptr;
 	SQLINTEGER dataSize = 0;
 	SQLRETURN rc;
 
@@ -433,7 +433,7 @@ std::string ODBCStatementImpl::nativeSQL()
 
 	SQLINTEGER length = (SQLINTEGER) statement.size() * 2;
 
-	char* pNative = 0;
+	char* pNative = nullptr;
 	SQLINTEGER retlen = length;
 	do
 	{

Data/ODBC/src/SessionImpl.cpp

@@ -170,7 +170,7 @@ void SessionImpl::open(const std::string& connect)
 			&SessionImpl::setDataTypeInfo,
 			&SessionImpl::dataTypeInfo);
 
-		Poco::Data::ODBC::SQLSetConnectAttr(_db, SQL_ATTR_QUIET_MODE, 0, 0);
+		Poco::Data::ODBC::SQLSetConnectAttr(_db, SQL_ATTR_QUIET_MODE, nullptr, 0);
 
 		if (!canTransact()) autoCommit("", true);
 	}
@@ -227,7 +227,7 @@ inline Poco::Any SessionImpl::getCursorUse(const std::string&) const
 #pragma warning (disable : 4995) // ignore marked as deprecated
 #endif
 	SQLUINTEGER curUse = 0;
-	Poco::Data::ODBC::SQLGetConnectAttr(_db, SQL_ATTR_ODBC_CURSORS, &curUse, SQL_IS_UINTEGER, 0);
+	Poco::Data::ODBC::SQLGetConnectAttr(_db, SQL_ATTR_ODBC_CURSORS, &curUse, SQL_IS_UINTEGER, nullptr);
 	switch (curUse)
 	{
 	case SQL_CUR_USE_ODBC:
@@ -263,7 +263,7 @@ bool SessionImpl::canTransact() const
 	if (ODBC_TXN_CAPABILITY_UNKNOWN == _canTransact)
 	{
 		SQLUSMALLINT ret;
-		checkError(Poco::Data::ODBC::SQLGetInfo(_db, SQL_TXN_CAPABLE, &ret, 0, 0),
+		checkError(Poco::Data::ODBC::SQLGetInfo(_db, SQL_TXN_CAPABLE, &ret, 0, nullptr),
 			"Failed to obtain transaction capability info.");
 
 		_canTransact = (SQL_TC_NONE != ret) ?
@@ -318,7 +318,7 @@ bool SessionImpl::getMultiActiveResultset(const std::string&) const
 {
 #ifdef POCO_DATA_ODBC_HAVE_SQL_SERVER_EXT
 	SQLINTEGER mars;
-	Poco::Data::ODBC::SQLGetConnectAttr(_db, SQL_COPT_SS_MARS_ENABLED, &mars, SQL_IS_INTEGER, 0);
+	Poco::Data::ODBC::SQLGetConnectAttr(_db, SQL_COPT_SS_MARS_ENABLED, &mars, SQL_IS_INTEGER, nullptr);
 	return mars == SQL_MARS_ENABLED_YES;
 #else
 	return false;
@@ -332,7 +332,7 @@ Poco::UInt32 SessionImpl::getTransactionIsolation() const
 	checkError(SQLGetConnectAttr(_db, SQL_ATTR_TXN_ISOLATION,
 		&isolation,
 		0,
-		0));
+		nullptr));
 
 	return transactionIsolation(isolation);
 }
@@ -359,7 +359,7 @@ Poco::UInt32 SessionImpl::getDefaultTransactionIsolation() const
 	checkError(SQLGetInfo(_db, SQL_DEFAULT_TXN_ISOLATION,
 		&isolation,
 		0,
-		0));
+		nullptr));
 
 	return transactionIsolation(isolation);
 }
@@ -418,7 +418,7 @@ bool SessionImpl::isAutoCommit(const std::string&) const
 		SQL_ATTR_AUTOCOMMIT,
 		&value,
 		0,
-		0));
+		nullptr));
 
 	return (0 != value);
 }
@@ -433,7 +433,7 @@ bool SessionImpl::isTransaction() const
 		SQL_ATTR_AUTOCOMMIT,
 		&value,
 		0,
-		0));
+		nullptr));
 
 	if (0 == value) return _inTransaction;
 	else return false;
@@ -505,7 +505,7 @@ int SessionImpl::maxStatementLength() const
 		SQL_MAXIMUM_STATEMENT_LENGTH,
 		(SQLPOINTER) &info,
 		0,
-		0)))
+		nullptr)))
 	{
 		throw ConnectionException(_db,
 			"SQLGetInfo(SQL_MAXIMUM_STATEMENT_LENGTH)");

Data/ODBC/testsuite/src/ODBCAccessTest.cpp

@@ -35,7 +35,7 @@ using Poco::format;
 using Poco::NotFoundException;
 
 
-Session*    ODBCAccessTest::_pSession = 0;
+Session*    ODBCAccessTest::_pSession = nullptr;
 std::string ODBCAccessTest::_dbConnString;
 Poco::Data::ODBC::Utility::DriverMap ODBCAccessTest::_drivers;
 
@@ -209,5 +209,5 @@ CppUnit::Test* ODBCAccessTest::suite()
 		return pSuite;
 	}
 
-	return 0;
+	return nullptr;
 }

Data/ODBC/testsuite/src/ODBCDB2Test.cpp

@@ -681,5 +681,5 @@ CppUnit::Test* ODBCDB2Test::suite()
 		return pSuite;
 	}
 
-	return 0;
+	return nullptr;
 }

Data/ODBC/testsuite/src/ODBCMySQLTest.cpp

@@ -506,5 +506,5 @@ CppUnit::Test* ODBCMySQLTest::suite()
 		return pSuite;
 	}
 
-	return 0;
+	return nullptr;
 }

Data/ODBC/testsuite/src/ODBCOracleTest.cpp

@@ -1024,5 +1024,5 @@ CppUnit::Test* ODBCOracleTest::suite()
 		return pSuite;
 	}
 
-	return 0;
+	return nullptr;
 }

Data/ODBC/testsuite/src/ODBCPostgreSQLTest.cpp

@@ -687,5 +687,5 @@ CppUnit::Test* ODBCPostgreSQLTest::suite()
 		return pSuite;
 	}
 
-	return 0;
+	return nullptr;
 }

Data/ODBC/testsuite/src/ODBCSQLServerTest.cpp

@@ -1211,5 +1211,5 @@ CppUnit::Test* ODBCSQLServerTest::suite()
 		return pSuite;
 	}
 
-	return 0;
+	return nullptr;
 }

Data/ODBC/testsuite/src/ODBCSQLiteTest.cpp

@@ -398,5 +398,5 @@ CppUnit::Test* ODBCSQLiteTest::suite()
 		return pSuite;
 	}
 
-	return 0;
+	return nullptr;
 }

Data/ODBC/testsuite/src/ODBCTest.cpp

@@ -1454,7 +1454,7 @@ ODBCTest::SessionPtr ODBCTest::init(const std::string& driver,
 	const std::string& dbEncoding)
 {
 	Utility::drivers(_drivers);
-	if (!canConnect(driver, dsn, uid, pwd, dbConnString, db)) return 0;
+	if (!canConnect(driver, dsn, uid, pwd, dbConnString, db)) return nullptr;
 
 	try
 	{
@@ -1466,6 +1466,6 @@ ODBCTest::SessionPtr ODBCTest::init(const std::string& driver,
 	}catch (ConnectionFailedException& ex)
 	{
 		std::cout << ex.displayText() << std::endl;
-		return 0;
+		return nullptr;
 	}
 }

Data/ODBC/testsuite/src/SQLExecutor.cpp

@@ -172,7 +172,7 @@ void SQLExecutor::bareboneODBCTest(const std::string& dbConnString,
 		SQLCHAR connectOutput[1024] = {0};
 		SQLSMALLINT result;
 		rc = SQLDriverConnect(hdbc
-			, NULL
+			, nullptr
 			,(SQLCHAR*) dbConnString.c_str()
 			,(SQLSMALLINT) SQL_NTS
 			, connectOutput
@@ -307,7 +307,7 @@ void SQLExecutor::bareboneODBCTest(const std::string& dbConnString,
 				0,
 				(SQLPOINTER) &fourth,
 				0,
-				0);
+				nullptr);
 			poco_odbc_check_stmt (rc, hstmt);
 
 			rc = SQLBindParameter(hstmt,
@@ -319,7 +319,7 @@ void SQLExecutor::bareboneODBCTest(const std::string& dbConnString,
 				1,
 				(SQLPOINTER) &fifth,
 				0,
-				0);
+				nullptr);
 			poco_odbc_check_stmt (rc, hstmt);
 
 			if (dateTimeColSize == 0 || dateTimeDecDigits == -1)
@@ -354,7 +354,7 @@ void SQLExecutor::bareboneODBCTest(const std::string& dbConnString,
 				dateTimeDecDigits,
 				(SQLPOINTER) &sixth,
 				0,
-				0);
+				nullptr);
 			poco_odbc_check_stmt (rc, hstmt);
 
 			rc = SQLExecute(hstmt);
@@ -362,7 +362,7 @@ void SQLExecutor::bareboneODBCTest(const std::string& dbConnString,
 
 			if (SQL_NEED_DATA == rc)
 			{
-				SQLPOINTER pParam = 0;
+				SQLPOINTER pParam = nullptr;
 				while (SQL_NEED_DATA == (rc = SQLParamData(hstmt, &pParam)))
 				{
 					SQLINTEGER dataSize = 0;
@@ -600,7 +600,7 @@ void SQLExecutor::bareboneODBCMultiResultTest(const std::string& dbConnString,
 		SQLCHAR connectOutput[512] = {0};
 		SQLSMALLINT result;
 		rc = SQLDriverConnect(hdbc
-			, NULL
+			, nullptr
 			,(SQLCHAR*) dbConnString.c_str()
 			,(SQLSMALLINT) SQL_NTS
 			, connectOutput
@@ -822,7 +822,7 @@ void SQLExecutor::bareboneODBCStoredFuncTest(const std::string& dbConnString,
 	SQLCHAR connectOutput[1024] = { 0 };
 	SQLSMALLINT result;
 	rc = SQLDriverConnect(hdbc
-		, NULL
+		, nullptr
 		, (SQLCHAR*)dbConnString.c_str()
 		, (SQLSMALLINT)SQL_NTS
 		, connectOutput
@@ -944,7 +944,7 @@ void SQLExecutor::bareboneODBCStoredFuncTest(const std::string& dbConnString,
 
 		if (SQL_NEED_DATA == rc)
 		{
-			SQLPOINTER pParam = 0;
+			SQLPOINTER pParam = nullptr;
 			while (SQL_NEED_DATA == (rc = SQLParamData(hstmt, &pParam)))
 			{
 				if ((pParam != (SQLPOINTER)retVal) &&

Data/PostgreSQL/include/Poco/Data/PostgreSQL/BinaryExtractor.h

@@ -428,7 +428,7 @@ private:
 //
 inline bool BinaryExtractor::isColumnNull(const OutputParameter& anOutputParameter) const
 {
-	return anOutputParameter.isNull() || 0 == anOutputParameter.pData();
+	return anOutputParameter.isNull() || nullptr == anOutputParameter.pData();
 }
 
 

Data/PostgreSQL/include/Poco/Data/PostgreSQL/Extractor.h

@@ -448,7 +448,7 @@ private:
 //
 inline bool Extractor::isColumnNull(const OutputParameter& outputParameter) const
 {
-	return outputParameter.isNull() || 0 == outputParameter.pData();
+	return outputParameter.isNull() || nullptr == outputParameter.pData();
 }
 
 

Data/PostgreSQL/include/Poco/Data/PostgreSQL/PostgreSQLTypes.h

@@ -194,16 +194,16 @@ inline InputParameter::InputParameter(Poco::Data::MetaColumn::ColumnDataType fie
 	_pData(aDataPtr),
 	_size(theSize),
 	_isBinary(Poco::Data::MetaColumn::FDT_BLOB == _fieldType || Poco::Data::MetaColumn::FDT_CLOB == _fieldType),
-	_pNonStringVersionRepresentation(0)
+	_pNonStringVersionRepresentation(nullptr)
 {
 }
 
 
 inline InputParameter::InputParameter(): _fieldType(Poco::Data::MetaColumn::FDT_UNKNOWN),
-	_pData(0),
+	_pData(nullptr),
 	_size(0),
 	_isBinary(false),
-	_pNonStringVersionRepresentation(0)
+	_pNonStringVersionRepresentation(nullptr)
 {
 }
 
@@ -239,7 +239,7 @@ inline bool InputParameter::isBinary() const
 
 inline void InputParameter::setStringVersionRepresentation(const std::string& aString)
 {
-	_pNonStringVersionRepresentation = 0;
+	_pNonStringVersionRepresentation = nullptr;
 	_stringVersionRepresentation = aString;
 	_size = _stringVersionRepresentation.size();
 }
@@ -281,7 +281,7 @@ inline const void* InputParameter::pInternalRepresentation() const
 
 	case Poco::Data::MetaColumn::FDT_UNKNOWN:
 	default:
-		return 0;
+		return nullptr;
 	}
 }
 
@@ -306,7 +306,7 @@ inline OutputParameter::OutputParameter():
 	_fieldType(Poco::Data::MetaColumn::FDT_UNKNOWN),
 	_internalFieldType(static_cast<Oid>(-1)),
 	_rowNumber(0),
-	_pData(0),
+	_pData(nullptr),
 	_size(0),
 	_isNull(true)
 {
@@ -381,7 +381,7 @@ inline PQConnectionInfoOptionsFree::~PQConnectionInfoOptionsFree()
 	if (_pConnectionInfoOption)
 	{
 		PQconninfoFree(_pConnectionInfoOption);
-        _pConnectionInfoOption = 0;
+		_pConnectionInfoOption = nullptr;
 	}
 }
 
@@ -397,7 +397,7 @@ inline PQResultClear::~PQResultClear()
 	if (_pPQResult)
 	{
 		PQclear(_pPQResult);
-        _pPQResult = 0;
+		_pPQResult = nullptr;
 	}
 }
 
@@ -415,7 +415,7 @@ inline PGCancelFree::~PGCancelFree()
 	if (_pPGCancel)
 	{
 		PQfreeCancel(_pPGCancel);
-        _pPGCancel = 0;
+		_pPGCancel = nullptr;
 	}
 }
 

Data/PostgreSQL/src/Binder.cpp

@@ -186,7 +186,7 @@ void Binder::bind(std::size_t pos, const UUID& val, Direction dir)
 void Binder::bind(std::size_t pos, const NullData&, Direction dir)
 {
 	poco_assert(dir == PD_IN);
-	realBind(pos, Poco::Data::MetaColumn::FDT_UNKNOWN, 0, 0);
+	realBind(pos, Poco::Data::MetaColumn::FDT_UNKNOWN, nullptr, 0);
 }
 
 

Data/PostgreSQL/src/SessionHandle.cpp

@@ -34,7 +34,7 @@ const std::string SessionHandle::POSTGRESQL_SERIALIZABLE	= "SERIALIZABLE";
 
 
 SessionHandle::SessionHandle():
-	_pConnection(0),
+	_pConnection(nullptr),
 	_inTransaction(false),
 	_isAsynchronousCommit(false),
 	_tranactionIsolationLevel(Session::TRANSACTION_READ_COMMITTED)
@@ -86,7 +86,7 @@ void SessionHandle::connect(const std::string& aConnectionString)
 	{
 		// free bad connection
 		PQfinish(_pConnection);
-		_pConnection = 0;
+		_pConnection = nullptr;
 	}
 
 	_pConnection = PQconnectdb(aConnectionString.c_str());
@@ -97,7 +97,7 @@ void SessionHandle::connect(const std::string& aConnectionString)
 		if (_pConnection)
 		{
 			PQfinish(_pConnection);
-			_pConnection = 0;
+			_pConnection = nullptr;
 		}
 		throw ConnectionFailedException(msg);
 	}
@@ -152,7 +152,7 @@ void SessionHandle::disconnect()
 	{
 		PQfinish(_pConnection);
 
-		_pConnection = 0;
+		_pConnection = nullptr;
 
 		_connectionString = std::string();
 		_inTransaction= false;
@@ -197,7 +197,7 @@ std::string SessionHandle::lastError() const
 std::string SessionHandle::lastErrorNoLock() const
 {
 	// DO NOT ACQUIRE THE MUTEX IN PRIVATE METHODS
-	std::string lastErrorString (0 != _pConnection ? PQerrorMessage(_pConnection) : "not connected");
+	std::string lastErrorString (nullptr != _pConnection ? PQerrorMessage(_pConnection) : "not connected");
 
 	return lastErrorString;
 }
@@ -328,7 +328,7 @@ void SessionHandle::cancel()
 
 	PGCancelFree cancelFreer(ptrPGCancel);
 
-	PQcancel(ptrPGCancel, 0, 0); // no error buffer
+	PQcancel(ptrPGCancel, nullptr, 0); // no error buffer
 }
 
 
@@ -565,7 +565,7 @@ SessionParametersMap SessionHandle::connectionParameters() const
 		throw NotConnectedException();
 	}
 
-	PQconninfoOption* ptrConnInfoOptions = 0;
+	PQconninfoOption* ptrConnInfoOptions = nullptr;
 	{
 		Poco::FastMutex::ScopedLock mutexLocker(_sessionMutex);
 

Data/PostgreSQL/src/StatementExecutor.cpp

@@ -76,7 +76,7 @@ StatementExecutor::StatementExecutor(SessionHandle& sessionHandle, bool binaryEx
 	_sessionHandle(sessionHandle),
 	_binaryExtraction(binaryExtraction),
 	_state(STMT_INITED),
-	_pResultHandle(0),
+	_pResultHandle(nullptr),
 	_countPlaceholdersInSQLStatement(0),
 	_currentRow(0),
 	_affectedRowCount(0)
@@ -133,13 +133,13 @@ void StatementExecutor::prepare(const std::string& aSQLStatement)
 	std::replace(statementName.begin(), statementName.end(), '-', 'p');  // PostgreSQL doesn't like dashes in prepared statement names
 	const char* pStatementName = statementName.c_str();
 
-	PGresult* ptrPGResult = 0;
+	PGresult* ptrPGResult = nullptr;
 
 	{
 		Poco::FastMutex::ScopedLock mutexLocker(_sessionHandle.mutex());
 
 		// prepare the statement - temporary PGresult returned
-		ptrPGResult = PQprepare(_sessionHandle, pStatementName, ptrCSQLStatement, (int)countPlaceholdersInSQLStatement, 0);
+		ptrPGResult = PQprepare(_sessionHandle, pStatementName, ptrCSQLStatement, (int)countPlaceholdersInSQLStatement, nullptr);
 	}
 
 	{
@@ -254,15 +254,15 @@ void StatementExecutor::execute()
 	// clear out any result data.  One way or another it is now obsolete.
 	clearResults();
 
-	PGresult* ptrPGResult = 0;
+	PGresult* ptrPGResult = nullptr;
 	{
 		Poco::FastMutex::ScopedLock mutexLocker(_sessionHandle.mutex());
 
 		ptrPGResult = PQexecPrepared(_sessionHandle,
 			_preparedStatementName.c_str(), (int)_countPlaceholdersInSQLStatement,
-			_inputParameterVector.size() != 0 ? &pParameterVector[ 0 ] : 0,
-			_inputParameterVector.size() != 0 ? &parameterLengthVector[ 0 ] : 0,
-			_inputParameterVector.size() != 0 ? &parameterFormatVector[ 0 ] : 0,
+			_inputParameterVector.size() != 0 ? &pParameterVector[ 0 ] : nullptr,
+			_inputParameterVector.size() != 0 ? &parameterLengthVector[ 0 ] : nullptr,
+			_inputParameterVector.size() != 0 ? &parameterFormatVector[ 0 ] : nullptr,
 			_binaryExtraction ? 1 : 0);
 	}
 
@@ -308,7 +308,7 @@ void StatementExecutor::execute()
 	{	// non Select DML statments also have an affected row count.
 		// unfortunately PostgreSQL offers up this count as a char * - go figure!
 		const char * pNonSelectAffectedRowCountString = PQcmdTuples(_pResultHandle);
-		if (0 != pNonSelectAffectedRowCountString)
+		if (nullptr != pNonSelectAffectedRowCountString)
 		{
 			if	(	Poco::NumberParser::tryParse(pNonSelectAffectedRowCountString, affectedRowCount)
 				 && affectedRowCount >= 0

Data/PostgreSQL/testsuite/src/PostgreSQLTest.cpp

@@ -41,8 +41,8 @@ using Poco::NamedTuple;
 using Poco::Environment;
 
 
-Poco::SharedPtr<Poco::Data::Session> PostgreSQLTest::_pSession = 0;
-Poco::SharedPtr<SQLExecutor> PostgreSQLTest::_pExecutor = 0;
+Poco::SharedPtr<Poco::Data::Session> PostgreSQLTest::_pSession = nullptr;
+Poco::SharedPtr<SQLExecutor> PostgreSQLTest::_pExecutor = nullptr;
 
 
 //
@@ -1254,7 +1254,7 @@ CppUnit::Test* PostgreSQLTest::suite()
 	catch (ConnectionFailedException& ex)
 	{
 		std::cout << ex.displayText() << std::endl;
-		return 0;
+		return nullptr;
 	}
 
 	std::cout << "*** Connected to [" << "PostgreSQL" << "] test database." << std::endl;

Data/PostgreSQL/testsuite/src/SQLExecutor.cpp

@@ -174,13 +174,13 @@ void SQLExecutor::oidPostgreSQLTest(std::string host, std::string user, std::str
 	connectionString.append("port=");
 	connectionString.append(port);
 
-	PGconn *  pConnection = 0;
+	PGconn *  pConnection = nullptr;
 
 	pConnection = PQconnectdb(connectionString.c_str());
 
 	assertTrue (PQstatus(pConnection) == CONNECTION_OK);
 
-	PGresult * pResult = 0;
+	PGresult * pResult = nullptr;
 	std::string sql = "DROP TABLE IF EXISTS Test";
 
 	pResult = PQexec(pConnection, sql.c_str());
@@ -203,7 +203,7 @@ void SQLExecutor::oidPostgreSQLTest(std::string host, std::string user, std::str
 	sql = "SELECT * FROM Test";
 	std::string selectStatementName = "SELECT Statement";
 
-	pResult = PQprepare(pConnection, selectStatementName.c_str(), sql.c_str(), 0, 0);
+	pResult = PQprepare(pConnection, selectStatementName.c_str(), sql.c_str(), 0, nullptr);
 
 	assertTrue (PQresultStatus(pResult) == PGRES_COMMAND_OK);
 	PQclear(pResult);
@@ -273,20 +273,20 @@ void SQLExecutor::barebonePostgreSQLTest(std::string host, std::string user, std
 	connectionString.append("port=");
 	connectionString.append(port);
 
-	PGconn *  pConnection = 0;
+	PGconn *  pConnection = nullptr;
 
 	pConnection = PQconnectdb(connectionString.c_str());
 
 	assertTrue (PQstatus(pConnection) == CONNECTION_OK);
 
-	PGresult * pResult = 0;
+	PGresult * pResult = nullptr;
 	std::string sql = "DROP TABLE IF EXISTS Test";
 
 	pResult = PQexec(pConnection, sql.c_str());
 
 	std::cout << "Drop Table Test Result: " <<  PQresStatus(PQresultStatus(pResult)) << " statement: "<< sql.c_str() << std::endl;
 
-	assertTrue (	PQresultStatus(pResult) == PGRES_COMMAND_OK
+	assertTrue (PQresultStatus(pResult) == PGRES_COMMAND_OK
 			|| PQresultStatus(pResult) == PGRES_FATAL_ERROR);
 
 	PQclear(pResult);
@@ -306,7 +306,7 @@ void SQLExecutor::barebonePostgreSQLTest(std::string host, std::string user, std
 						insertStatementName.c_str(),
 						sql.c_str(),
 						5,
-						0
+						nullptr
 						);
 
 	assertTrue (PQresultStatus(pResult) == PGRES_COMMAND_OK);
@@ -316,7 +316,7 @@ void SQLExecutor::barebonePostgreSQLTest(std::string host, std::string user, std
 	int fourth = ByteOrder::toNetwork((Poco::UInt32) 4);
 	float fifth = 1.5;
 
-	const char *paramValues[5] = { 0 };
+	const char *paramValues[5] = { nullptr };
 	int paramLengths[5] = { 0 };
 	int paramFormats[5] = { 0 };
 
@@ -364,7 +364,7 @@ void SQLExecutor::barebonePostgreSQLTest(std::string host, std::string user, std
 
 	assertTrue (PQntuples(pResult) == 1);
 
-	char* pSelectResult[5] = { 0 };
+	char* pSelectResult[5] = { nullptr };
 	int pResultLengths[5] = { 0 };
 
 	// column 0
@@ -377,7 +377,7 @@ void SQLExecutor::barebonePostgreSQLTest(std::string host, std::string user, std
 										0,
 										0
 									);
-	assertTrue (pSelectResult[ 0 ] != 0);
+	assertTrue (pSelectResult[ 0 ] != nullptr);
 	assertTrue (pResultLengths[ 0 ] != 0);
 
 	// column 1
@@ -390,7 +390,7 @@ void SQLExecutor::barebonePostgreSQLTest(std::string host, std::string user, std
 										0,
 										1
 									);
-	assertTrue (pSelectResult[ 1 ] != 0);
+	assertTrue (pSelectResult[ 1 ] != nullptr);
 	assertTrue (pResultLengths[ 1 ] != 0);
 
 	// column 2
@@ -403,7 +403,7 @@ void SQLExecutor::barebonePostgreSQLTest(std::string host, std::string user, std
 										0,
 										2
 									);
-	assertTrue (pSelectResult[ 2 ] != 0);
+	assertTrue (pSelectResult[ 2 ] != nullptr);
 	assertTrue (pResultLengths[ 2 ] != 0);
 
 // column 3
@@ -416,7 +416,7 @@ void SQLExecutor::barebonePostgreSQLTest(std::string host, std::string user, std
 											0,
 											3
 									);
-	assertTrue (pSelectResult[ 3 ] != 0);
+	assertTrue (pSelectResult[ 3 ] != nullptr);
 	assertTrue (pResultLengths[ 3 ] != 0);
 
 	// column 4
@@ -429,7 +429,7 @@ void SQLExecutor::barebonePostgreSQLTest(std::string host, std::string user, std
 										0,
 										4
 									);
-	assertTrue (pSelectResult[ 4 ] != 0);
+	assertTrue (pSelectResult[ 4 ] != nullptr);
 	assertTrue (pResultLengths[ 4 ] != 0);
 
 /*

Data/SQLite/include/Poco/Data/SQLite/Utility.h

@@ -148,7 +148,7 @@ public:
 		static CBMap retMap;
 		T* pRet = reinterpret_cast<T*>(eventHookRegister(pDB, callbackFn, pParam));
 
-		if (pRet == 0)
+		if (pRet == nullptr)
 		{
 			if (retMap.find(pDB) == retMap.end())
 			{
@@ -161,8 +161,8 @@ public:
 			CBMapItPair retMapRange = retMap.equal_range(pDB);
 			for (CBMapIt it = retMapRange.first; it != retMapRange.second; ++it)
 			{
-				poco_assert (it->second.first != 0);
-				if ((callbackFn == 0) && (*pRet == *it->second.second))
+				poco_assert (it->second.first != nullptr);
+				if ((callbackFn == nullptr) && (*pRet == *it->second.second))
 				{
 					retMap.erase(it);
 					return true;

Data/SQLite/src/Notifier.cpp

@@ -69,7 +69,7 @@ bool Notifier::disableUpdate()
 {
 	Poco::Mutex::ScopedLock l(_mutex);
 
-	if (Utility::registerUpdateHandler(Utility::dbHandle(_session), (Utility::UpdateCallbackType) 0, this))
+	if (Utility::registerUpdateHandler(Utility::dbHandle(_session), (Utility::UpdateCallbackType) nullptr, this))
 		_enabledEvents &= ~SQLITE_NOTIFY_UPDATE;
 
 	return !updateEnabled();
@@ -97,7 +97,7 @@ bool Notifier::disableCommit()
 {
 	Poco::Mutex::ScopedLock l(_mutex);
 
-	if (Utility::registerUpdateHandler(Utility::dbHandle(_session), (Utility::CommitCallbackType) 0, this))
+	if (Utility::registerUpdateHandler(Utility::dbHandle(_session), (Utility::CommitCallbackType) nullptr, this))
 		_enabledEvents &= ~SQLITE_NOTIFY_COMMIT;
 
 	return !commitEnabled();
@@ -125,7 +125,7 @@ bool Notifier::disableRollback()
 {
 	Poco::Mutex::ScopedLock l(_mutex);
 
-	if (Utility::registerUpdateHandler(Utility::dbHandle(_session), (Utility::RollbackCallbackType) 0, this))
+	if (Utility::registerUpdateHandler(Utility::dbHandle(_session), (Utility::RollbackCallbackType) nullptr, this))
 		_enabledEvents &= ~SQLITE_NOTIFY_ROLLBACK;
 
 	return !rollbackEnabled();

Data/SQLite/src/SQLiteStatementImpl.cpp

@@ -32,7 +32,7 @@ const int SQLiteStatementImpl::POCO_SQLITE_INV_ROW_CNT = -1;
 SQLiteStatementImpl::SQLiteStatementImpl(Poco::Data::SessionImpl& rSession, sqlite3* pDB):
 	StatementImpl(rSession),
 	_pDB(pDB),
-	_pStmt(0),
+	_pStmt(nullptr),
 	_stepCalled(false),
 	_nextResponse(0),
 	_affectedRowCount(POCO_SQLITE_INV_ROW_CNT),
@@ -66,14 +66,14 @@ void SQLiteStatementImpl::compileImpl()
 
 	std::string statement(toString());
 
-	sqlite3_stmt* pStmt = 0;
+	sqlite3_stmt* pStmt = nullptr;
 	const char* pSql = _pLeftover ? _pLeftover->c_str() : statement.c_str();
 
 	if (0 == std::strlen(pSql))
 		throw InvalidSQLStatementException("Empty statements are illegal");
 
 	int rc = SQLITE_OK;
-	const char* pLeftover = 0;
+	const char* pLeftover = nullptr;
 	bool queryFound = false;
 
 	do
@@ -82,7 +82,7 @@ void SQLiteStatementImpl::compileImpl()
 		if (rc != SQLITE_OK)
 		{
 			if (pStmt) sqlite3_finalize(pStmt);
-			pStmt = 0;
+			pStmt = nullptr;
 			std::string errMsg = sqlite3_errmsg(_pDB);
 			Utility::throwException(_pDB, rc, errMsg);
 		}
@@ -149,7 +149,7 @@ void SQLiteStatementImpl::bindImpl()
 {
 	_stepCalled = false;
 	_nextResponse = 0;
-	if (_pStmt == 0) return;
+	if (_pStmt == nullptr) return;
 
 	sqlite3_reset(_pStmt);
 
@@ -217,9 +217,9 @@ void SQLiteStatementImpl::clear()
 	if (_pStmt)
 	{
 		sqlite3_finalize(_pStmt);
-		_pStmt=0;
+		_pStmt=nullptr;
 	}
-	_pLeftover = 0;
+	_pLeftover = nullptr;
 }
 
 
@@ -229,7 +229,7 @@ bool SQLiteStatementImpl::hasNext()
 		return (_nextResponse == SQLITE_ROW);
 
 	// _pStmt is allowed to be null for conditional SQL statements
-	if (_pStmt == 0)
+	if (_pStmt == nullptr)
 	{
 		_stepCalled   = true;
 		_nextResponse = SQLITE_DONE;
@@ -305,7 +305,7 @@ const MetaColumn& SQLiteStatementImpl::metaColumn(std::size_t pos) const
 int SQLiteStatementImpl::affectedRowCount() const
 {
 	if (_affectedRowCount != POCO_SQLITE_INV_ROW_CNT) return _affectedRowCount;
-	return _pStmt == 0 || sqlite3_stmt_readonly(_pStmt) ? 0 : sqlite3_changes(_pDB);
+	return _pStmt == nullptr || sqlite3_stmt_readonly(_pStmt) ? 0 : sqlite3_changes(_pDB);
 }
 
 

Data/SQLite/src/Utility.cpp

@@ -62,7 +62,7 @@ Utility::TypeMap Utility::_types;
 Poco::Mutex Utility::_mutex;
 
 
-Utility::SQLiteMutex::SQLiteMutex(sqlite3* pDB): _pMutex((pDB) ? sqlite3_db_mutex(pDB) : 0)
+Utility::SQLiteMutex::SQLiteMutex(sqlite3* pDB): _pMutex((pDB) ? sqlite3_db_mutex(pDB) : nullptr)
 {
 	if (_pMutex)
 		sqlite3_mutex_enter(_pMutex);
@@ -256,7 +256,7 @@ bool Utility::fileToMemory(sqlite3* pInMemory, const std::string& fileName)
 
 	// Note: SQLITE_OPEN_READWRITE is required to correctly handle an existing hot journal.
 	// See #3135
-	rc = sqlite3_open_v2(fileName.c_str(), &pFile, SQLITE_OPEN_READWRITE | SQLITE_OPEN_URI, NULL);
+	rc = sqlite3_open_v2(fileName.c_str(), &pFile, SQLITE_OPEN_READWRITE | SQLITE_OPEN_URI, nullptr);
 	if(rc == SQLITE_OK )
 	{
 		pBackup = sqlite3_backup_init(pInMemory, "main", pFile, "main");
@@ -279,7 +279,7 @@ bool Utility::memoryToFile(const std::string& fileName, sqlite3* pInMemory)
 	sqlite3* pFile;
 	sqlite3_backup* pBackup;
 
-	rc = sqlite3_open_v2(fileName.c_str(), &pFile, SQLITE_OPEN_READWRITE | SQLITE_OPEN_CREATE | SQLITE_OPEN_URI, NULL);
+	rc = sqlite3_open_v2(fileName.c_str(), &pFile, SQLITE_OPEN_READWRITE | SQLITE_OPEN_CREATE | SQLITE_OPEN_URI, nullptr);
 	if(rc == SQLITE_OK )
 	{
 		pBackup = sqlite3_backup_init(pFile, "main", pInMemory, "main");

Data/SQLite/testsuite/src/SQLiteTest.cpp

@@ -476,7 +476,7 @@ void SQLiteTest::testNullCharPointer()
 
 	try
 	{
-		const char* pc = 0;
+		const char* pc = nullptr;
 		tmp << "INSERT INTO PERSON VALUES(:ln, :fn, :ad, :age)",
 			bind("lastname"),
 			bind("firstname"),
@@ -506,7 +506,7 @@ void SQLiteTest::testInsertCharPointer()
 	tmp << "DROP TABLE IF EXISTS Person", now;
 	tmp << "CREATE TABLE IF NOT EXISTS Person (LastName VARCHAR(30), FirstName VARCHAR, Address VARCHAR, Age INTEGER(3))", now;
 
-	const char* pc = 0;
+	const char* pc = nullptr;
 	try
 	{
 		tmp << "INSERT INTO PERSON VALUES(:ln, :fn, :ad, :age)", bind(pc), now;
@@ -522,7 +522,7 @@ void SQLiteTest::testInsertCharPointer()
 		bind("Address"),
 		bind(133132));
 
-	std::free((void*) pc); pc = 0;
+	std::free((void*) pc); pc = nullptr;
 	assertTrue (1 == stmt.execute());
 
 	tmp << "SELECT COUNT(*) FROM PERSON", into(count), now;
@@ -3005,7 +3005,7 @@ void SQLiteTest::testUpdateCallback()
 	assertTrue (_deleteCounter == 1);
 
 	// disarm callback and do the same drill
-	assertTrue (Utility::registerUpdateHandler(tmp, (Utility::UpdateCallbackType) 0, &val));
+	assertTrue (Utility::registerUpdateHandler(tmp, (Utility::UpdateCallbackType) nullptr, &val));
 
 	tmp << "DROP TABLE IF EXISTS Person", now;
 	tmp << "CREATE TABLE IF NOT EXISTS Person (LastName VARCHAR(30), FirstName VARCHAR, Address VARCHAR, Age INTEGER(3))", now;
@@ -3074,7 +3074,7 @@ void SQLiteTest::testCommitCallback()
 	tmp.commit();
 	assertTrue (val == 2);
 
-	assertTrue (Utility::registerUpdateHandler(tmp, (Utility::CommitCallbackType) 0, &val));
+	assertTrue (Utility::registerUpdateHandler(tmp, (Utility::CommitCallbackType) nullptr, &val));
 	val = 0;
 	tmp.begin();
 	tmp << "DROP TABLE IF EXISTS Person", now;
@@ -3115,7 +3115,7 @@ void SQLiteTest::testRollbackCallback()
 	tmp.rollback();
 	assertTrue (val == 2);
 
-	assertTrue (Utility::registerUpdateHandler(tmp, (Utility::RollbackCallbackType) 0, &val));
+	assertTrue (Utility::registerUpdateHandler(tmp, (Utility::RollbackCallbackType) nullptr, &val));
 	val = 0;
 	tmp.begin();
 	tmp << "DROP TABLE IF EXISTS Person", now;

Data/include/Poco/Data/LOB.h

@@ -136,7 +136,7 @@ public:
 		/// If the LOB is empty, returns NULL.
 	{
 		if (_pContent->empty())
-			return 0;
+			return nullptr;
 		else
 			return _pContent->data();
 	}
@@ -147,7 +147,7 @@ public:
 		/// If the LOB is empty, returns NULL.
 	{
 		if (_pContent->empty())
-			return 0;
+			return nullptr;
 		else
 			return _pContent->data();
 	}
@@ -294,7 +294,7 @@ public:
 		val.assign(_val.begin(), _val.end());
 	}
 
-	VarHolder* clone(Placeholder<VarHolder>* pVarHolder = 0) const
+	VarHolder* clone(Placeholder<VarHolder>* pVarHolder = nullptr) const
 	{
 		return cloneHolder(pVarHolder, _val);
 	}
@@ -332,7 +332,7 @@ public:
 		val.assign(_val.begin(), _val.end());
 	}
 
-	VarHolder* clone(Placeholder<VarHolder>* pVarHolder = 0) const
+	VarHolder* clone(Placeholder<VarHolder>* pVarHolder = nullptr) const
 	{
 		return cloneHolder(pVarHolder, _val);
 	}

Data/include/Poco/Data/RecordSet.h

@@ -78,12 +78,12 @@ public:
 	static const std::size_t UNKNOWN_TOTAL_ROW_COUNT;
 
 	explicit RecordSet(const Statement& rStatement,
-		RowFormatter::Ptr pRowFormatter = 0);
+		RowFormatter::Ptr pRowFormatter = nullptr);
 		/// Creates the RecordSet.
 
 	RecordSet(Session& rSession,
 		const std::string& query,
-		RowFormatter::Ptr pRowFormatter = 0);
+		RowFormatter::Ptr pRowFormatter = nullptr);
 		/// Creates the RecordSet.
 
 	RecordSet(Session& rSession,

Data/include/Poco/Data/Row.h

@@ -82,12 +82,12 @@ public:
 		/// Creates the Row.
 
 	Row(NameVecPtr pNames,
-		const RowFormatter::Ptr& pFormatter = 0);
+		const RowFormatter::Ptr& pFormatter = nullptr);
 		/// Creates the Row.
 
 	Row(NameVecPtr pNames,
 		const SortMapPtr& pSortMap,
-		const RowFormatter::Ptr& pFormatter = 0);
+		const RowFormatter::Ptr& pFormatter = nullptr);
 		/// Creates the Row.
 
 	~Row();
@@ -200,14 +200,14 @@ public:
 	const ValueVec& values() const;
 		/// Returns the const reference to values vector.
 
-	void setFormatter(const RowFormatter::Ptr& pFormatter = 0);
+	void setFormatter(const RowFormatter::Ptr& pFormatter = nullptr);
 		/// Sets the formatter for this row and takes the
 		/// shared ownership of it.
 
 	const RowFormatter& getFormatter() const;
 		/// Returns the reference to the formatter.
 
-	void setSortMap(const SortMapPtr& pSortMap = 0);
+	void setSortMap(const SortMapPtr& pSortMap = nullptr);
 		/// Adds the sorting fields entry and takes the
 		/// shared ownership of it.
 

Data/include/Poco/Data/Transaction.h

@@ -37,7 +37,7 @@ class Data_API Transaction
 	/// See Transaction for more details and purpose of this template.
 {
 public:
-	Transaction(Poco::Data::Session& session, Poco::Logger* pLogger = 0);
+	Transaction(Poco::Data::Session& session, Poco::Logger* pLogger = nullptr);
 		/// Creates the Transaction and starts it, using the given database session and logger.
 
 	Transaction(Poco::Data::Session& session, bool start);
@@ -46,7 +46,7 @@ public:
 		/// to start the transaction.
 
 	template <typename T>
-	Transaction(Poco::Data::Session& rSession, T& t, Poco::Logger* pLogger = 0):
+	Transaction(Poco::Data::Session& rSession, T& t, Poco::Logger* pLogger = nullptr):
 		_rSession(rSession),
 		_pLogger(pLogger)
 		/// Creates the Transaction, using the given database session, transactor and logger.

Data/samples/WebNotifier/src/WebNotifier.cpp

@@ -88,7 +88,7 @@ class WebSocketRequestHandler: public HTTPRequestHandler
 	/// Handler for the WebSocket connection.
 {
 public:
-	WebSocketRequestHandler() : _pWS(0), _flags(0)
+	WebSocketRequestHandler() : _pWS(nullptr), _flags(0)
 	{
 	}
 
@@ -165,7 +165,7 @@ class RequestHandlerFactory: public HTTPRequestHandlerFactory
 	/// Web request handler factory.
 {
 public:
-	RequestHandlerFactory() : _pHandler(0)
+	RequestHandlerFactory() : _pHandler(nullptr)
 	{
 	}
 
@@ -185,7 +185,7 @@ public:
 		if (uri != "/favicon.ico")
 			std::cout << "Unknown URI: " << uri << std::endl;
 
-		return 0;
+		return nullptr;
 	}
 
 	WebSocketRequestHandler& handler()

Data/src/AbstractBinding.cpp

@@ -22,7 +22,7 @@ namespace Data {
 AbstractBinding::AbstractBinding(const std::string& name,
 	Direction direction,
 	Poco::UInt32 bulkSize):
-	_pBinder(0),
+	_pBinder(nullptr),
 	_name(name),
 	_direction(direction),
 	_bulkSize(bulkSize)

Data/src/AbstractExtraction.cpp

@@ -22,7 +22,7 @@ namespace Data {
 AbstractExtraction::AbstractExtraction(Poco::UInt32 limit,
 	Poco::UInt32 position,
 	bool bulk):
-	_pExtractor(0),
+	_pExtractor(nullptr),
 	_limit(limit),
 	_position(position),
 	_bulk(bulk),

Data/src/RecordSet.cpp

@@ -130,9 +130,9 @@ RecordSet& RecordSet::operator = (RecordSet&& other) noexcept
 void RecordSet::reset(const Statement& stmt)
 {
 	delete _pBegin;
-	_pBegin = 0;
+	_pBegin = nullptr;
 	delete _pEnd;
-	_pEnd = 0;
+	_pEnd = nullptr;
 	_currentRow = 0;
 	_totalRowCount = UNKNOWN_TOTAL_ROW_COUNT;
 
@@ -473,7 +473,7 @@ Row& RecordSet::row(std::size_t pos)
 		throw RangeException("Invalid recordset row requested.");
 
 	RowMap::const_iterator it = _rowMap.find(pos);
-	Row* pRow = 0;
+	Row* pRow = nullptr;
 	std::size_t columns = columnCount();
 	if (it == _rowMap.end())
 	{

Data/src/Row.cpp

@@ -30,7 +30,7 @@ std::ostream& operator << (std::ostream &os, const Row& row)
 
 
 Row::Row():
-	_pNames(0),
+	_pNames(nullptr),
 	_pSortMap(new SortMap),
 	_pFormatter(new SimpleRowFormatter)
 {
@@ -41,7 +41,7 @@ Row::Row(NameVecPtr pNames,
 	const RowFormatter::Ptr& pFormatter): _pNames(pNames)
 {
 	if (!_pNames) throw NullPointerException();
-	init(0, pFormatter);
+	init(nullptr, pFormatter);
 }
 
 

Data/src/RowFilter.cpp

@@ -32,7 +32,7 @@ RowFilter::RowFilter(RecordSet* pRecordSet): _pRecordSet(pRecordSet), _not(false
 }
 
 
-RowFilter::RowFilter(Ptr pParent, LogicOperator op): _pRecordSet(0),
+RowFilter::RowFilter(Ptr pParent, LogicOperator op): _pRecordSet(nullptr),
 	_pParent(pParent),
 	_not(false)
 {
@@ -61,7 +61,7 @@ RowFilter::~RowFilter()
 {
 	try
 	{
-		if (_pRecordSet) _pRecordSet->filter(0);
+		if (_pRecordSet) _pRecordSet->filter(nullptr);
 		if (_pParent && _pParent->has(this))
 			_pParent->removeFilter(this);
 		release();
@@ -89,7 +89,7 @@ bool RowFilter::isAllowed(std::size_t row) const
 			if (_comparisonMap.find(name) == _comparisonMap.end()) continue;
 
 			Poco::Dynamic::Var ret;
-			CompT compOp = 0;
+			CompT compOp = nullptr;
 			Poco::Dynamic::Var val = rs.value(col, row, false);
 
 			switch (it->second.get<1>())
@@ -180,8 +180,8 @@ void RowFilter::removeFilter(Ptr pFilter)
 
 	_pRecordSet->moveFirst();
 	_filterMap.erase(pFilter);
-	pFilter->_pRecordSet = 0;
-	pFilter->_pParent = 0;
+	pFilter->_pRecordSet = nullptr;
+	pFilter->_pParent = nullptr;
 }
 
 

Data/src/Transaction.cpp

@@ -30,7 +30,7 @@ Transaction::Transaction(Poco::Data::Session& rSession, Poco::Logger* pLogger):
 
 Transaction::Transaction(Poco::Data::Session& rSession, bool start):
 	_rSession(rSession),
-	_pLogger(0)
+	_pLogger(nullptr)
 {
 	if (start) begin();
 }

Data/testsuite/src/SessionImpl.cpp

@@ -24,12 +24,12 @@ SessionImpl::SessionImpl(const std::string& init, std::size_t timeout):
 	_connected(true)
 {
 	addFeature("f1", &SessionImpl::setF, &SessionImpl::getF);
-	addFeature("f2", 0, &SessionImpl::getF);
-	addFeature("f3", &SessionImpl::setF, 0);
+	addFeature("f2", nullptr, &SessionImpl::getF);
+	addFeature("f3", &SessionImpl::setF, nullptr);
 	addFeature("throwOnHasNext", &SessionImpl::setThrowOnHasNext, &SessionImpl::getThrowOnHasNext);
 	addFeature("connected", &SessionImpl::setConnected, &SessionImpl::getConnected);
 	addProperty("p1", &SessionImpl::setP, &SessionImpl::getP);
-	addProperty("p2", 0, &SessionImpl::getP);
+	addProperty("p2", nullptr, &SessionImpl::getP);
 	addProperty("p3", &SessionImpl::setP, &SessionImpl::getP);
 	setDBMSName("Test");
 }

Encodings/Compiler/src/TextEncodingCompiler.cpp

@@ -21,7 +21,6 @@
 #include "Poco/Exception.h"
 #include "Poco/DateTime.h"
 #include "Poco/AutoPtr.h"
-#include "Poco/Path.h"
 #include "Poco/Net/HTTPStreamFactory.h"
 #include "Poco/Net/FTPStreamFactory.h"
 #include <iostream>
@@ -367,7 +366,7 @@ const std::string TextEncodingCompiler::IMPL_TEMPLATE(
 	"const char* ${CLASS}::_names[] =\n"
 	"{\n"
 	"${ENCODING_NAMES}"
-	"	NULL\n"
+	"	nullptr\n"
 	"};\n"
 	"\n"
 	"\n"

Encodings/include/Poco/DoubleByteEncoding.h

@@ -65,7 +65,7 @@ protected:
 		///     {
 		///         "myencoding",
 		///         "MyEncoding",
-		///         NULL
+		///         nullptr
 		///     };
 		///
 		/// The first entry in names must be the canonical name.

Encodings/src/ISO8859_10Encoding.cpp

@@ -23,7 +23,7 @@ const char* ISO8859_10Encoding::_names[] =
 	"ISO-8859-10",
 	"Latin6",
 	"Latin-6",
-	NULL
+	nullptr
 };
 
 

Encodings/src/ISO8859_11Encoding.cpp

@@ -21,7 +21,7 @@ namespace Poco {
 const char* ISO8859_11Encoding::_names[] =
 {
 	"ISO-8859-11",
-	NULL
+	nullptr
 };