63 lines
1.4 KiB
C
63 lines
1.4 KiB
C
#include <stdio.h>
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#include <stdlib.h>
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#include <stdbool.h>
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// Type for vector, change to the desired type to be used in the vector
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#define VECTOR_TYPE int
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typedef struct vector {
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size_t length;
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VECTOR_TYPE* arr;
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size_t start;
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size_t size;
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} vector_t;
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inline static size_t vector_end(vector_t* self) {
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return (self->start + self->size) % self->length;
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}
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vector_t vector_init(size_t length) {
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vector_t self;
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self.length = length;
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self.arr = malloc(length * sizeof(VECTOR_TYPE));
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self.start = 0;
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self.size = 0;
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return self;
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}
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bool vector_add(vector_t* self, VECTOR_TYPE element, bool to_end) {
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if (self->size == self->length) {
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return false;
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}
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if (to_end) {
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self->arr[vector_end(self)] = element;
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} else {
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if (self->size == 0) {
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self->arr[self->start] = element;
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} else {
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self->arr[self->start - 1] = element;
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self->start--;
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}
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}
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self->size++;
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return true;
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}
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bool vector_remove(vector_t* self, VECTOR_TYPE* destination, bool from_end) {
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if (self->size == 0) {
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return false;
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}
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*destination = self->arr[!from_end ? vector_end(self) : self->start];
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self->start = from_end ? (self->start + 1) % self->length : self->start;
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self->size--;
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return true;
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}
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void vector_destroy(vector_t* self) {
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if (self->arr != NULL) {
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free(self->arr);
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self->arr = NULL;
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}
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}
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