constructors_destructors.c

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/* ************************************************************************** */
/*      ____    _    _____ ____     _    _   _   _____ _  _   ____  ____      */
/*     / ___|  / \  |  ___|  _ \   / \  | \ | | |_   _| || | |  _ \/ ___|     */
/*     \___ \ / _ \ | |_  | |_) | / _ \ |  \| |   | | | || |_| | | \___ \     */
/*      ___) / ___ \|  _| |  _ < / ___ \| |\  |   | | |__   _| |_| |___) |    */
/*     |____/_/   \_|_|   |_| \_/_/   \_|_| \_|   |_|    |_| |____/|____/     */
/*                                                                            */
/* ************************************************************************** */
 
#include "o2s/deque.h"
 
#include <stdlib.h> //free

deque_t deque_new(void* storage, size_t capacity, size_t type_size)
{
    return (deque_t){.storage   = storage,
                     .front     = storage,
                     .back      = storage,
                     .count     = 0,
                     .type_size = type_size,
                     .capacity  = capacity};
}

deque_t deque_allocate(size_t capacity, size_t type_size)
{
    void* storage = calloc(capacity, type_size);
 
    if (storage == NULL)
        capacity = 0;
    return deque_new(storage, capacity, type_size);
}

void deque_clear(deque_t* self)
{
    self->front = self->storage;
    self->back  = self->storage;
    self->count = 0;
}

void deque_free(deque_t* self)
{
    if (self->storage != NULL)
        free(self->storage);
    self->storage = NULL;
    deque_clear(self);
    self->capacity = 0;
}