Codechange: Use null pointer literal instead of the NULL macro

8 files changed, 55 insertions, 55 deletions

diff --git a/src/core/alloc_func.hpp b/src/core/alloc_func.hpp
index c33e73301..c4ea1f561 100644
--- a/src/core/alloc_func.hpp
+++ b/src/core/alloc_func.hpp
@@ -53,23 +53,23 @@ static inline void CheckAllocationConstraints(size_t num_elements)
  * @note the memory contains garbage data (i.e. possibly non-zero values).
  * @tparam T the type of the variable(s) to allocation.
  * @param num_elements the number of elements to allocate of the given type.
- * @return NULL when num_elements == 0, non-NULL otherwise.
+ * @return nullptr when num_elements == 0, non-nullptr otherwise.
  */
 template <typename T>
 static inline T *MallocT(size_t num_elements)
 {
 	/*
 	 * MorphOS cannot handle 0 elements allocations, or rather that always
-	 * returns NULL. So we do that for *all* allocations, thus causing it
+	 * returns nullptr. So we do that for *all* allocations, thus causing it
 	 * to behave the same on all OSes.
 	 */
-	if (num_elements == 0) return NULL;
+	if (num_elements == 0) return nullptr;
 
 	/* Ensure the size does not overflow. */
 	CheckAllocationConstraints<T>(num_elements);
 
 	T *t_ptr = (T*)malloc(num_elements * sizeof(T));
-	if (t_ptr == NULL) MallocError(num_elements * sizeof(T));
+	if (t_ptr == nullptr) MallocError(num_elements * sizeof(T));
 	return t_ptr;
 }
 
@@ -81,20 +81,20 @@ static inline T *MallocT(size_t num_elements)
  * @note the memory contains all zero values.
  * @tparam T the type of the variable(s) to allocation.
  * @param num_elements the number of elements to allocate of the given type.
- * @return NULL when num_elements == 0, non-NULL otherwise.
+ * @return nullptr when num_elements == 0, non-nullptr otherwise.
  */
 template <typename T>
 static inline T *CallocT(size_t num_elements)
 {
 	/*
 	 * MorphOS cannot handle 0 elements allocations, or rather that always
-	 * returns NULL. So we do that for *all* allocations, thus causing it
+	 * returns nullptr. So we do that for *all* allocations, thus causing it
 	 * to behave the same on all OSes.
 	 */
-	if (num_elements == 0) return NULL;
+	if (num_elements == 0) return nullptr;
 
 	T *t_ptr = (T*)calloc(num_elements, sizeof(T));
-	if (t_ptr == NULL) MallocError(num_elements * sizeof(T));
+	if (t_ptr == nullptr) MallocError(num_elements * sizeof(T));
 	return t_ptr;
 }
 
@@ -107,26 +107,26 @@ static inline T *CallocT(size_t num_elements)
  * @tparam T the type of the variable(s) to allocation.
  * @param t_ptr the previous allocation to extend/shrink.
  * @param num_elements the number of elements to allocate of the given type.
- * @return NULL when num_elements == 0, non-NULL otherwise.
+ * @return nullptr when num_elements == 0, non-nullptr otherwise.
  */
 template <typename T>
 static inline T *ReallocT(T *t_ptr, size_t num_elements)
 {
 	/*
 	 * MorphOS cannot handle 0 elements allocations, or rather that always
-	 * returns NULL. So we do that for *all* allocations, thus causing it
+	 * returns nullptr. So we do that for *all* allocations, thus causing it
 	 * to behave the same on all OSes.
 	 */
 	if (num_elements == 0) {
 		free(t_ptr);
-		return NULL;
+		return nullptr;
 	}
 
 	/* Ensure the size does not overflow. */
 	CheckAllocationConstraints<T>(num_elements);
 
 	t_ptr = (T*)realloc(static_cast<void *>(t_ptr), num_elements * sizeof(T));
-	if (t_ptr == NULL) ReallocError(num_elements * sizeof(T));
+	if (t_ptr == nullptr) ReallocError(num_elements * sizeof(T));
 	return t_ptr;
 }
 
diff --git a/src/core/alloc_type.hpp b/src/core/alloc_type.hpp
index 5ea812b0e..685ff9890 100644
--- a/src/core/alloc_type.hpp
+++ b/src/core/alloc_type.hpp
@@ -73,7 +73,7 @@ private:
 
 public:
 	/** Create a new buffer */
-	ReusableBuffer() : buffer(NULL), count(0) {}
+	ReusableBuffer() : buffer(nullptr), count(0) {}
 	/** Clear the buffer */
 	~ReusableBuffer() { free(this->buffer); }
 
diff --git a/src/core/kdtree.hpp b/src/core/kdtree.hpp
index 154f27fc5..c7f66ebff 100644
--- a/src/core/kdtree.hpp
+++ b/src/core/kdtree.hpp
@@ -108,11 +108,11 @@ class Kdtree {
 		std::vector<T> elements = this->FreeSubtree(this->root);
 		elements.push_back(root_element);
 
-		if (include_element != NULL) {
+		if (include_element != nullptr) {
 			elements.push_back(*include_element);
 			initial_count++;
 		}
-		if (exclude_element != NULL) {
+		if (exclude_element != nullptr) {
 			typename std::vector<T>::iterator removed = std::remove(elements.begin(), elements.end(), *exclude_element);
 			elements.erase(removed, elements.end());
 			initial_count--;
@@ -377,7 +377,7 @@ public:
 	 */
 	void Rebuild()
 	{
-		this->Rebuild(NULL, NULL);
+		this->Rebuild(nullptr, nullptr);
 	}
 
 	/**
@@ -390,7 +390,7 @@ public:
 		if (this->Count() == 0) {
 			this->root = this->AddNode(element);
 		} else {
-			if (!this->IsUnbalanced() || !this->Rebuild(&element, NULL)) {
+			if (!this->IsUnbalanced() || !this->Rebuild(&element, nullptr)) {
 				this->InsertRecursive(element, this->root, 0);
 				this->IncrementUnbalanced();
 			}
@@ -408,7 +408,7 @@ public:
 	{
 		size_t count = this->Count();
 		if (count == 0) return;
-		if (!this->IsUnbalanced() || !this->Rebuild(NULL, &element)) {
+		if (!this->IsUnbalanced() || !this->Rebuild(nullptr, &element)) {
 			/* If the removed element is the root node, this modifies this->root */
 			this->root = this->RemoveRecursive(element, this->root, 0);
 			this->IncrementUnbalanced();
diff --git a/src/core/mem_func.hpp b/src/core/mem_func.hpp
index 687871164..5b3fe4cab 100644
--- a/src/core/mem_func.hpp
+++ b/src/core/mem_func.hpp
@@ -78,7 +78,7 @@ static inline int MemCmpT(const T *ptr1, const T *ptr2, size_t num = 1)
 template <typename T>
 static inline void MemReverseT(T *ptr1, T *ptr2)
 {
-	assert(ptr1 != NULL && ptr2 != NULL);
+	assert(ptr1 != nullptr && ptr2 != nullptr);
 	assert(ptr1 < ptr2);
 
 	do {
@@ -95,7 +95,7 @@ static inline void MemReverseT(T *ptr1, T *ptr2)
 template <typename T>
 static inline void MemReverseT(T *ptr, size_t num)
 {
-	assert(ptr != NULL);
+	assert(ptr != nullptr);
 
 	MemReverseT(ptr, ptr + (num - 1));
 }
diff --git a/src/core/pool_func.hpp b/src/core/pool_func.hpp
index 64af17564..ee4999286 100644
--- a/src/core/pool_func.hpp
+++ b/src/core/pool_func.hpp
@@ -39,8 +39,8 @@ DEFINE_POOL_METHOD(inline)::Pool(const char *name) :
 		checked(0),
 #endif /* OTTD_ASSERT */
 		cleaning(false),
-		data(NULL),
-		alloc_cache(NULL)
+		data(nullptr),
+		alloc_cache(nullptr)
 { }
 
 /**
@@ -71,7 +71,7 @@ DEFINE_POOL_METHOD(inline size_t)::FindFirstFree()
 	size_t index = this->first_free;
 
 	for (; index < this->first_unused; index++) {
-		if (this->data[index] == NULL) return index;
+		if (this->data[index] == nullptr) return index;
 	}
 
 	if (index < this->size) {
@@ -96,17 +96,17 @@ DEFINE_POOL_METHOD(inline size_t)::FindFirstFree()
  * @param size size of item
  * @param index index of item
  * @pre index < this->size
- * @pre this->Get(index) == NULL
+ * @pre this->Get(index) == nullptr
  */
 DEFINE_POOL_METHOD(inline void *)::AllocateItem(size_t size, size_t index)
 {
-	assert(this->data[index] == NULL);
+	assert(this->data[index] == nullptr);
 
 	this->first_unused = max(this->first_unused, index + 1);
 	this->items++;
 
 	Titem *item;
-	if (Tcache && this->alloc_cache != NULL) {
+	if (Tcache && this->alloc_cache != nullptr) {
 		assert(sizeof(Titem) == size);
 		item = (Titem *)this->alloc_cache;
 		this->alloc_cache = this->alloc_cache->next;
@@ -164,7 +164,7 @@ DEFINE_POOL_METHOD(void *)::GetNew(size_t size, size_t index)
 
 	if (index >= this->size) this->ResizeFor(index);
 
-	if (this->data[index] != NULL) {
+	if (this->data[index] != nullptr) {
 		SlErrorCorruptFmt("%s index " PRINTF_SIZE " already in use", this->name, index);
 	}
 
@@ -174,13 +174,13 @@ DEFINE_POOL_METHOD(void *)::GetNew(size_t size, size_t index)
 /**
  * Deallocates memory used by this index and marks item as free
  * @param index item to deallocate
- * @pre unit is allocated (non-NULL)
- * @note 'delete NULL' doesn't cause call of this function, so it is safe
+ * @pre unit is allocated (non-nullptr)
+ * @note 'delete nullptr' doesn't cause call of this function, so it is safe
  */
 DEFINE_POOL_METHOD(void)::FreeItem(size_t index)
 {
 	assert(index < this->size);
-	assert(this->data[index] != NULL);
+	assert(this->data[index] != nullptr);
 	if (Tcache) {
 		AllocCache *ac = (AllocCache *)this->data[index];
 		ac->next = this->alloc_cache;
@@ -188,7 +188,7 @@ DEFINE_POOL_METHOD(void)::FreeItem(size_t index)
 	} else {
 		free(this->data[index]);
 	}
-	this->data[index] = NULL;
+	this->data[index] = nullptr;
 	this->first_free = min(this->first_free, index);
 	this->items--;
 	if (!this->cleaning) Titem::PostDestructor(index);
@@ -199,16 +199,16 @@ DEFINE_POOL_METHOD(void)::CleanPool()
 {
 	this->cleaning = true;
 	for (size_t i = 0; i < this->first_unused; i++) {
-		delete this->Get(i); // 'delete NULL;' is very valid
+		delete this->Get(i); // 'delete nullptr;' is very valid
 	}
 	assert(this->items == 0);
 	free(this->data);
 	this->first_unused = this->first_free = this->size = 0;
-	this->data = NULL;
+	this->data = nullptr;
 	this->cleaning = false;
 
 	if (Tcache) {
-		while (this->alloc_cache != NULL) {
+		while (this->alloc_cache != nullptr) {
 			AllocCache *ac = this->alloc_cache;
 			this->alloc_cache = ac->next;
 			free(ac);
diff --git a/src/core/pool_type.hpp b/src/core/pool_type.hpp
index 38f314ebb..61dd29213 100644
--- a/src/core/pool_type.hpp
+++ b/src/core/pool_type.hpp
@@ -91,7 +91,7 @@ struct Pool : PoolBase {
 	size_t size;         ///< Current allocated size
 	size_t first_free;   ///< No item with index lower than this is free (doesn't say anything about this one!)
 	size_t first_unused; ///< This and all higher indexes are free (doesn't say anything about first_unused-1 !)
-	size_t items;        ///< Number of used indexes (non-NULL)
+	size_t items;        ///< Number of used indexes (non-nullptr)
 #ifdef OTTD_ASSERT
 	size_t checked;      ///< Number of items we checked for
 #endif /* OTTD_ASSERT */
@@ -115,13 +115,13 @@ struct Pool : PoolBase {
 	}
 
 	/**
-	 * Tests whether given index can be used to get valid (non-NULL) Titem
+	 * Tests whether given index can be used to get valid (non-nullptr) Titem
 	 * @param index index to examine
-	 * @return true if PoolItem::Get(index) will return non-NULL pointer
+	 * @return true if PoolItem::Get(index) will return non-nullptr pointer
 	 */
 	inline bool IsValidID(size_t index)
 	{
-		return index < this->first_unused && this->Get(index) != NULL;
+		return index < this->first_unused && this->Get(index) != nullptr;
 	}
 
 	/**
@@ -150,7 +150,7 @@ struct Pool : PoolBase {
 		 * Allocates space for new Titem
 		 * @param size size of Titem
 		 * @return pointer to allocated memory
-		 * @note can never fail (return NULL), use CanAllocate() to check first!
+		 * @note can never fail (return nullptr), use CanAllocate() to check first!
 		 */
 		inline void *operator new(size_t size)
 		{
@@ -164,7 +164,7 @@ struct Pool : PoolBase {
 		 */
 		inline void operator delete(void *p)
 		{
-			if (p == NULL) return;
+			if (p == nullptr) return;
 			Titem *pn = (Titem *)p;
 			assert(pn == Tpool->Get(pn->index));
 			Tpool->FreeItem(pn->index);
@@ -175,7 +175,7 @@ struct Pool : PoolBase {
 		 * @param size size of Titem
 		 * @param index index of item
 		 * @return pointer to allocated memory
-		 * @note can never fail (return NULL), use CanAllocate() to check first!
+		 * @note can never fail (return nullptr), use CanAllocate() to check first!
 		 * @pre index has to be unused! Else it will crash
 		 */
 		inline void *operator new(size_t size, size_t index)
@@ -228,9 +228,9 @@ struct Pool : PoolBase {
 		}
 
 		/**
-		 * Tests whether given index can be used to get valid (non-NULL) Titem
+		 * Tests whether given index can be used to get valid (non-nullptr) Titem
 		 * @param index index to examine
-		 * @return true if PoolItem::Get(index) will return non-NULL pointer
+		 * @return true if PoolItem::Get(index) will return non-nullptr pointer
 		 */
 		static inline bool IsValidID(size_t index)
 		{
@@ -252,11 +252,11 @@ struct Pool : PoolBase {
 		 * Returns Titem with given index
 		 * @param index of item to get
 		 * @return pointer to Titem
-		 * @note returns NULL for invalid index
+		 * @note returns nullptr for invalid index
 		 */
 		static inline Titem *GetIfValid(size_t index)
 		{
-			return index < Tpool->first_unused ? Tpool->Get(index) : NULL;
+			return index < Tpool->first_unused ? Tpool->Get(index) : nullptr;
 		}
 
 		/**
@@ -282,7 +282,7 @@ struct Pool : PoolBase {
 		 * Dummy function called after destructor of each member.
 		 * If you want to use it, override it in PoolItem's subclass.
 		 * @param index index of deleted item
-		 * @note when this function is called, PoolItem::Get(index) == NULL.
+		 * @note when this function is called, PoolItem::Get(index) == nullptr.
 		 * @note it's called only when !CleaningPool()
 		 */
 		static inline void PostDestructor(size_t index) { }
@@ -314,8 +314,8 @@ private:
 };
 
 #define FOR_ALL_ITEMS_FROM(type, iter, var, start) \
-	for (size_t iter = start; var = NULL, iter < type::GetPoolSize(); iter++) \
-		if ((var = type::Get(iter)) != NULL)
+	for (size_t iter = start; var = nullptr, iter < type::GetPoolSize(); iter++) \
+		if ((var = type::Get(iter)) != nullptr)
 
 #define FOR_ALL_ITEMS(type, iter, var) FOR_ALL_ITEMS_FROM(type, iter, var, 0)
 
diff --git a/src/core/smallmatrix_type.hpp b/src/core/smallmatrix_type.hpp
index cd4dee4e3..faa531d5f 100644
--- a/src/core/smallmatrix_type.hpp
+++ b/src/core/smallmatrix_type.hpp
@@ -46,13 +46,13 @@ protected:
 
 public:
 
-	SmallMatrix() : data(NULL), width(0), height(0), capacity(0) {}
+	SmallMatrix() : data(nullptr), width(0), height(0), capacity(0) {}
 
 	/**
 	 * Copy constructor.
 	 * @param other The other matrix to copy.
 	 */
-	SmallMatrix(const SmallMatrix &other) : data(NULL), width(0), height(0), capacity(0)
+	SmallMatrix(const SmallMatrix &other) : data(nullptr), width(0), height(0), capacity(0)
 	{
 		this->Assign(other);
 	}
@@ -112,7 +112,7 @@ public:
 		this->width = 0;
 		this->capacity = 0;
 		free(this->data);
-		this->data = NULL;
+		this->data = nullptr;
 	}
 
 	/**
@@ -216,8 +216,8 @@ public:
 	inline void Resize(uint new_width, uint new_height)
 	{
 		uint new_capacity = new_width * new_height;
-		T *new_data = NULL;
-		void (*copy)(T *dest, const T *src, size_t count) = NULL;
+		T *new_data = nullptr;
+		void (*copy)(T *dest, const T *src, size_t count) = nullptr;
 		if (new_capacity > this->capacity) {
 			/* If the data doesn't fit into current capacity, resize and copy ... */
 			new_data = MallocT<T>(new_capacity);
diff --git a/src/core/sort_func.hpp b/src/core/sort_func.hpp
index f3ac73a66..d557d24bd 100644
--- a/src/core/sort_func.hpp
+++ b/src/core/sort_func.hpp
@@ -53,8 +53,8 @@ static inline void GSortT(T *base, size_t num, int (CDECL *comparator)(const T*,
 {
 	if (num < 2) return;
 
-	assert(base != NULL);
-	assert(comparator != NULL);
+	assert(base != nullptr);
+	assert(comparator != nullptr);
 
 	T *a = base;
 	T *b = base + 1;