96 lines
2.1 KiB
C
96 lines
2.1 KiB
C
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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typedef struct {
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char * data;
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size_t element_size;
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size_t element_count;
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} vector_t;
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typedef struct {
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int a;
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int b;
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char * c;
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} example_t;
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extern void vector_push(vector_t * vector,
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void * data);
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extern void vector_pop(vector_t * vector);
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extern void * vector_get(vector_t * vector,
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size_t element);
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extern void vector_free(vector_t * vector);
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extern void example_print(example_t * example);
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// Add only 1 new element to vector.
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void vector_push(vector_t * vector,
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void * data) {
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++vector->element_count;
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vector->data = realloc(vector->data,
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vector->element_size * vector->element_count);
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if (vector->data == NULL) {
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// Handle or output error somehow?
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puts("vector_push");
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exit(EXIT_FAILURE);
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}
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memcpy(&vector->data[(vector->element_count - 1) * vector->element_size],
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data,
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vector->element_size);
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}
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void vector_pop(vector_t * vector) {
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(void) vector;
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}
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void * vector_get(vector_t * vector,
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size_t element) {
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if (element >= vector->element_count) {
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// Handle or output error somehow?
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puts("vector_get");
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exit(EXIT_FAILURE);
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}
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return &vector->data[vector->element_size * element];
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}
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void vector_free(vector_t * vector) {
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free(vector->data);
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}
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void example_print(example_t * example) {
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printf("a : %+i\n", example->a);
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printf("b : %+i\n", example->b);
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printf("c : %2s\n", example->c);
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}
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int main(void) {
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vector_t vector;
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example_t x = { 1, -1, "A" },
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y = { 2, -2, "B" },
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z = { 3, -3, "C" };
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vector.data = NULL; // Important to NULL it.
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vector.element_size = sizeof(example_t); // Important to type it.
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vector.element_count = 0UL; // Important to 0 it.
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vector_push(&vector, &x);
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vector_push(&vector, &y);
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vector_push(&vector, &z);
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example_print(vector_get(&vector, 0));
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example_print(vector_get(&vector, 1));
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example_print(vector_get(&vector, 2));
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vector_free(&vector);
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return (EXIT_SUCCESS);
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}
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