Deque iterator
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Leonardo committed
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@@ -53,6 +53,8 @@
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struct SNAME##_s *target; \
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size_t cursor; \
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size_t count; \
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bool start; \
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bool end; \
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}; \
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\
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/* HEADER ********************************************************************/
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@@ -79,222 +81,286 @@
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FMOD size_t PFX##_capacity(SNAME *_deque_); \
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\
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FMOD void PFX##_iter(SNAME##_iter *iter, SNAME *target); \
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FMOD bool PFX##_iter_start(SNAME##_iter *iter); \
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FMOD bool PFX##_iter_end(SNAME##_iter *iter); \
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FMOD void PFX##_iter_tostart(SNAME##_iter *iter); \
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FMOD void PFX##_iter_toend(SNAME##_iter *iter); \
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FMOD bool PFX##_iter_next(SNAME##_iter *iter, T *result, size_t *index); \
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FMOD bool PFX##_iter_prev(SNAME##_iter *iter, T *result, size_t *index); \
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\
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/* SOURCE ********************************************************************/
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#define DEQUE_GENERATE_SOURCE(PFX, SNAME, FMOD, K, T) \
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\
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FMOD bool PFX##_grow(SNAME *_deque_); \
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\
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FMOD SNAME *PFX##_new(size_t size) \
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{ \
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if (size < 1) \
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return NULL; \
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\
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SNAME *_deque_ = malloc(sizeof(SNAME)); \
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\
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if (!_deque_) \
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return NULL; \
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\
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_deque_->buffer = malloc(sizeof(T) * size); \
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\
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if (!_deque_->buffer) \
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{ \
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free(_deque_); \
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return NULL; \
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} \
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\
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for (size_t i = 0; i < size; i++) \
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_deque_->buffer[i] = 0; \
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\
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_deque_->capacity = size; \
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_deque_->count = 0; \
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_deque_->front = 0; \
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_deque_->rear = 0; \
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\
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return _deque_; \
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} \
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\
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FMOD void PFX##_free(SNAME *_deque_) \
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{ \
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free(_deque_->buffer); \
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free(_deque_); \
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} \
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\
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FMOD bool PFX##_push_front(SNAME *_deque_, T element) \
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{ \
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if (PFX##_full(_deque_)) \
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{ \
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if (!PFX##_grow(_deque_)) \
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return false; \
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} \
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\
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_deque_->front = (_deque_->front == 0) ? _deque_->capacity - 1 : _deque_->front - 1; \
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\
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_deque_->buffer[_deque_->front] = element; \
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\
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_deque_->count++; \
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\
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return true; \
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} \
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\
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FMOD bool PFX##_push_back(SNAME *_deque_, T element) \
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{ \
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if (PFX##_full(_deque_)) \
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{ \
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if (!PFX##_grow(_deque_)) \
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return false; \
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} \
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\
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_deque_->buffer[_deque_->rear] = element; \
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\
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_deque_->rear = (_deque_->rear == _deque_->capacity - 1) ? 0 : _deque_->rear + 1; \
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\
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_deque_->count++; \
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\
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return true; \
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} \
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\
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FMOD bool PFX##_pop_front(SNAME *_deque_) \
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{ \
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if (PFX##_empty(_deque_)) \
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return false; \
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\
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_deque_->buffer[_deque_->front] = 0; \
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\
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_deque_->front = (_deque_->front == _deque_->capacity - 1) ? 0 : _deque_->front + 1; \
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\
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_deque_->count--; \
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\
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return true; \
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} \
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\
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FMOD bool PFX##_pop_back(SNAME *_deque_) \
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{ \
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if (PFX##_empty(_deque_)) \
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return false; \
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\
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_deque_->rear = (_deque_->rear == 0) ? _deque_->capacity - 1 : _deque_->rear - 1; \
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\
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_deque_->buffer[_deque_->rear] = 0; \
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\
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_deque_->count--; \
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\
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return true; \
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} \
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\
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FMOD bool PFX##_push_front_if(SNAME *_deque_, T element, bool condition) \
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{ \
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if (condition) \
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return PFX##_push_front(_deque_, element); \
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\
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return false; \
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} \
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\
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FMOD bool PFX##_push_back_if(SNAME *_deque_, T element, bool condition) \
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{ \
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if (condition) \
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return PFX##_push_back(_deque_, element); \
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\
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return false; \
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} \
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\
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FMOD bool PFX##_pop_front_if(SNAME *_deque_, bool condition) \
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{ \
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if (condition) \
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return PFX##_pop_front(_deque_); \
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\
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return false; \
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} \
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\
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FMOD bool PFX##_pop_back_if(SNAME *_deque_, bool condition) \
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{ \
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if (condition) \
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return PFX##_pop_back(_deque_); \
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\
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return false; \
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} \
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\
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FMOD T PFX##_back(SNAME *_deque_) \
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{ \
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if (PFX##_empty(_deque_)) \
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return 0; \
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\
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return _deque_->buffer[(_deque_->rear == 0) ? _deque_->capacity - 1 : _deque_->rear - 1]; \
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} \
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\
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FMOD T PFX##_front(SNAME *_deque_) \
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{ \
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if (PFX##_empty(_deque_)) \
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return 0; \
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\
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return _deque_->buffer[_deque_->front]; \
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} \
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\
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FMOD bool PFX##_empty(SNAME *_deque_) \
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{ \
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return _deque_->count == 0; \
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} \
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\
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FMOD bool PFX##_full(SNAME *_deque_) \
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{ \
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return _deque_->count >= _deque_->capacity; \
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} \
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\
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FMOD size_t PFX##_count(SNAME *_deque_) \
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{ \
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return _deque_->count; \
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} \
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\
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FMOD size_t PFX##_capacity(SNAME *_deque_) \
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{ \
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return _deque_->capacity; \
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} \
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\
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FMOD bool PFX##_grow(SNAME *_deque_) \
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{ \
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\
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size_t new_capacity = _deque_->capacity * 2; \
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\
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T *new_buffer = malloc(sizeof(T) * new_capacity); \
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\
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if (!new_buffer) \
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return false; \
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\
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for (size_t i = _deque_->front, j = 0; j < _deque_->count; i = (i + 1) % _deque_->capacity, j++) \
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{ \
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new_buffer[j] = _deque_->buffer[i]; \
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} \
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\
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free(_deque_->buffer); \
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\
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_deque_->buffer = new_buffer; \
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_deque_->capacity = new_capacity; \
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_deque_->front = 0; \
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_deque_->rear = _deque_->count; \
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\
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return true; \
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} \
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\
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FMOD void PFX##_iter(SNAME##_iter *iter, SNAME *target) \
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{ \
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iter->target = target; \
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iter->cursor = target->front; \
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iter->count = 0; \
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} \
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\
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FMOD bool PFX##_iter_next(SNAME##_iter *iter, T *result, size_t *index) \
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{ \
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if (iter->count < iter->target->count) \
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{ \
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*result = iter->target->buffer[iter->cursor]; \
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iter->cursor = (iter->cursor + 1) % (iter->target->capacity); \
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*index = iter->count; \
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iter->count++; \
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return true; \
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} \
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\
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return false; \
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#define DEQUE_GENERATE_SOURCE(PFX, SNAME, FMOD, K, T) \
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\
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FMOD bool PFX##_grow(SNAME *_deque_); \
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\
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FMOD SNAME *PFX##_new(size_t size) \
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{ \
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if (size < 1) \
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return NULL; \
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\
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SNAME *_deque_ = malloc(sizeof(SNAME)); \
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\
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if (!_deque_) \
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return NULL; \
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\
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_deque_->buffer = malloc(sizeof(T) * size); \
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\
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if (!_deque_->buffer) \
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{ \
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free(_deque_); \
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return NULL; \
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} \
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\
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for (size_t i = 0; i < size; i++) \
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_deque_->buffer[i] = 0; \
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\
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_deque_->capacity = size; \
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_deque_->count = 0; \
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_deque_->front = 0; \
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_deque_->rear = 0; \
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\
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return _deque_; \
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} \
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\
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FMOD void PFX##_free(SNAME *_deque_) \
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{ \
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free(_deque_->buffer); \
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free(_deque_); \
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} \
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\
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FMOD bool PFX##_push_front(SNAME *_deque_, T element) \
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{ \
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if (PFX##_full(_deque_)) \
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{ \
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if (!PFX##_grow(_deque_)) \
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return false; \
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} \
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\
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_deque_->front = (_deque_->front == 0) ? _deque_->capacity - 1 : _deque_->front - 1; \
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\
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_deque_->buffer[_deque_->front] = element; \
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\
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_deque_->count++; \
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\
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return true; \
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} \
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\
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FMOD bool PFX##_push_back(SNAME *_deque_, T element) \
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{ \
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if (PFX##_full(_deque_)) \
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{ \
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if (!PFX##_grow(_deque_)) \
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return false; \
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} \
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\
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_deque_->buffer[_deque_->rear] = element; \
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\
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_deque_->rear = (_deque_->rear == _deque_->capacity - 1) ? 0 : _deque_->rear + 1; \
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\
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_deque_->count++; \
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\
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return true; \
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} \
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\
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FMOD bool PFX##_pop_front(SNAME *_deque_) \
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{ \
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if (PFX##_empty(_deque_)) \
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return false; \
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\
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_deque_->buffer[_deque_->front] = 0; \
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\
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_deque_->front = (_deque_->front == _deque_->capacity - 1) ? 0 : _deque_->front + 1; \
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\
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_deque_->count--; \
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\
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return true; \
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} \
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\
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FMOD bool PFX##_pop_back(SNAME *_deque_) \
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{ \
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if (PFX##_empty(_deque_)) \
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return false; \
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\
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_deque_->rear = (_deque_->rear == 0) ? _deque_->capacity - 1 : _deque_->rear - 1; \
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\
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_deque_->buffer[_deque_->rear] = 0; \
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\
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_deque_->count--; \
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\
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return true; \
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} \
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\
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FMOD bool PFX##_push_front_if(SNAME *_deque_, T element, bool condition) \
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{ \
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if (condition) \
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return PFX##_push_front(_deque_, element); \
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\
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return false; \
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} \
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\
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FMOD bool PFX##_push_back_if(SNAME *_deque_, T element, bool condition) \
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{ \
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if (condition) \
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return PFX##_push_back(_deque_, element); \
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\
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return false; \
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} \
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\
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FMOD bool PFX##_pop_front_if(SNAME *_deque_, bool condition) \
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{ \
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if (condition) \
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return PFX##_pop_front(_deque_); \
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\
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return false; \
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} \
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\
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FMOD bool PFX##_pop_back_if(SNAME *_deque_, bool condition) \
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{ \
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if (condition) \
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return PFX##_pop_back(_deque_); \
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\
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return false; \
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} \
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\
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FMOD T PFX##_back(SNAME *_deque_) \
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{ \
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if (PFX##_empty(_deque_)) \
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return 0; \
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\
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return _deque_->buffer[(_deque_->rear == 0) ? _deque_->capacity - 1 : _deque_->rear - 1]; \
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} \
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\
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FMOD T PFX##_front(SNAME *_deque_) \
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{ \
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if (PFX##_empty(_deque_)) \
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return 0; \
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\
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return _deque_->buffer[_deque_->front]; \
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} \
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\
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FMOD bool PFX##_empty(SNAME *_deque_) \
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{ \
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return _deque_->count == 0; \
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} \
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\
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FMOD bool PFX##_full(SNAME *_deque_) \
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{ \
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return _deque_->count >= _deque_->capacity; \
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} \
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\
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FMOD size_t PFX##_count(SNAME *_deque_) \
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{ \
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return _deque_->count; \
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} \
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\
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FMOD size_t PFX##_capacity(SNAME *_deque_) \
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{ \
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return _deque_->capacity; \
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} \
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\
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FMOD bool PFX##_grow(SNAME *_deque_) \
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{ \
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\
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size_t new_capacity = _deque_->capacity * 2; \
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\
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T *new_buffer = malloc(sizeof(T) * new_capacity); \
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\
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if (!new_buffer) \
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return false; \
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\
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for (size_t i = _deque_->front, j = 0; j < _deque_->count; i = (i + 1) % _deque_->capacity, j++) \
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{ \
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new_buffer[j] = _deque_->buffer[i]; \
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} \
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\
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free(_deque_->buffer); \
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\
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_deque_->buffer = new_buffer; \
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_deque_->capacity = new_capacity; \
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_deque_->front = 0; \
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_deque_->rear = _deque_->count; \
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\
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return true; \
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} \
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\
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FMOD void PFX##_iter(SNAME##_iter *iter, SNAME *target) \
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{ \
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iter->target = target; \
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iter->cursor = target->front; \
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iter->count = 0; \
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iter->start = true; \
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iter->end = PFX##_empty(target); \
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} \
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\
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FMOD bool PFX##_iter_start(SNAME##_iter *iter) \
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{ \
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return iter->cursor == iter->target->front && iter->start; \
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} \
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\
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FMOD bool PFX##_iter_end(SNAME##_iter *iter) \
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{ \
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size_t real_rear = iter->target->rear == 0 ? iter->target->capacity - 1 : iter->target->rear - 1; \
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return iter->cursor == real_rear && iter->end; \
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} \
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\
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FMOD void PFX##_iter_tostart(SNAME##_iter *iter) \
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{ \
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iter->cursor = iter->target->front; \
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iter->count = 0; \
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iter->start = true; \
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iter->end = false; \
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} \
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\
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FMOD void PFX##_iter_toend(SNAME##_iter *iter) \
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{ \
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if (PFX##_empty(iter->target)) \
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iter->cursor = 0; \
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else \
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iter->cursor = (iter->target->rear == 0) ? iter->target->count - 1 : iter->target->rear - 1; \
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\
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iter->count = iter->target->count - 1; \
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iter->start = false; \
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iter->end = true; \
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} \
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\
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FMOD bool PFX##_iter_next(SNAME##_iter *iter, T *result, size_t *index) \
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{ \
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if (iter->end) \
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return false; \
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\
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*index = iter->count; \
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*result = iter->target->buffer[iter->cursor]; \
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iter->start = false; \
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\
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if (iter->count == iter->target->count - 1) \
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iter->end = true; \
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else \
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{ \
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iter->cursor = (iter->cursor + 1) % (iter->target->capacity); \
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iter->count++; \
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} \
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\
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return true; \
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} \
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\
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FMOD bool PFX##_iter_prev(SNAME##_iter *iter, T *result, size_t *index) \
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{ \
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if (iter->start) \
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return false; \
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\
|
||||
*index = iter->count; \
|
||||
*result = iter->target->buffer[iter->cursor]; \
|
||||
iter->end = false; \
|
||||
\
|
||||
if (iter->count == 0) \
|
||||
iter->start = true; \
|
||||
else \
|
||||
{ \
|
||||
iter->cursor = (iter->cursor == 0) ? iter->target->capacity - 1 : iter->cursor - 1; \
|
||||
iter->count--; \
|
||||
} \
|
||||
\
|
||||
return true; \
|
||||
}
|
||||
|
||||
#endif /* CMC_DEQUE_H */
|
||||
+5
-5
@@ -84,9 +84,9 @@ int main(int argc, char const *argv[])
|
||||
sum2 += var;
|
||||
})
|
||||
|
||||
// FOR_EACH_REV(d, deque, , int, d, {
|
||||
// sum3 += var;
|
||||
// })
|
||||
FOR_EACH_REV(d, deque, , int, d, {
|
||||
sum3 += var;
|
||||
})
|
||||
|
||||
FOR_EACH_REV(ll, linked, , int, ll, {
|
||||
sum4 += var;
|
||||
@@ -98,8 +98,8 @@ int main(int argc, char const *argv[])
|
||||
printf("%10s PASSED\n", "STACK");
|
||||
if (sum2 == 50005000)
|
||||
printf("%10s PASSED\n", "QUEUE");
|
||||
// if (sum3 == 50005000)
|
||||
// printf("%10s PASSED\n", "DEQUE");
|
||||
if (sum3 == 50005000)
|
||||
printf("%10s PASSED\n", "DEQUE");
|
||||
if (sum4 == 50005000)
|
||||
printf("%10s PASSED\n", "LINKEDLIST");
|
||||
|
||||
|
||||
@@ -0,0 +1,55 @@
|
||||
// Checks if the deque iterator can go back and forward in the deque without
|
||||
// hitting invalid states or a null pointer. Check is done visually.
|
||||
#include <stdio.h>
|
||||
#include <stdlib.h>
|
||||
#include <stdint.h>
|
||||
#include <stdbool.h>
|
||||
#include "../../src/deque.h"
|
||||
|
||||
DEQUE_GENERATE(d, deque, static, , int)
|
||||
|
||||
int main(int argc, char const *argv[])
|
||||
{
|
||||
size_t i;
|
||||
int r;
|
||||
|
||||
// Initliazie deque and add some elements
|
||||
deque *d = d_new(10);
|
||||
for (int i = 0; i < 10; i++)
|
||||
{
|
||||
i % 2 == 0 ? d_push_back(d, i) : d_push_front(d, i);
|
||||
}
|
||||
|
||||
// Initialize iterator
|
||||
deque_iter iter;
|
||||
d_iter(&iter, d);
|
||||
|
||||
// Make the iterator go back and forward
|
||||
for (int j = 0; j < 4; j++)
|
||||
{
|
||||
while (d_iter_next(&iter, &r, &i))
|
||||
printf("C[%2d] = %2d\n", i, r);
|
||||
printf("\n");
|
||||
while (d_iter_prev(&iter, &r, &i))
|
||||
printf("C[%2d] = %2d\n", i, r);
|
||||
printf("\n\n");
|
||||
}
|
||||
|
||||
for (d_iter_tostart(&iter); !d_iter_end(&iter); /**/)
|
||||
{
|
||||
d_iter_next(&iter, &r, &i);
|
||||
printf("D[%2d] = %2d\n", i, r);
|
||||
}
|
||||
|
||||
printf("\n");
|
||||
|
||||
for (d_iter_toend(&iter); !d_iter_start(&iter); /**/)
|
||||
{
|
||||
d_iter_prev(&iter, &r, &i);
|
||||
printf("D[%2d] = %2d\n", i, r);
|
||||
}
|
||||
|
||||
d_free(d);
|
||||
|
||||
return 0;
|
||||
}
|
||||
Reference in new issue
Block a user