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- // @COMPILECMD gcc $@ -o vector.out
- #include <stdio.h>
- #include <stdlib.h>
- #include <string.h>
-
- typedef struct {
- char * data;
- size_t element_size;
- size_t element_count;
- } vector_t;
-
- typedef struct {
- int a;
- int b;
- char * c;
- } example_t;
-
- extern void vector_init(vector_t * vector,
- size_t element_size,
- size_t element_count);
-
- extern void vector_push(vector_t * vector,
- void * data);
-
- extern void vector_pop(vector_t * vector);
-
- extern void * vector_get(vector_t * vector,
- size_t element);
-
- extern void vector_set(vector_t * vector,
- void * data,
- size_t element);
-
- extern void vector_free(vector_t * vector);
-
- extern void example_print(example_t * example);
-
- void vector_init(vector_t * vector,
- size_t element_size,
- size_t element_count) {
- vector->data = NULL;
- vector->element_size = element_size;
- vector->element_count = element_count;
-
- vector->data = malloc(vector->element_size * vector->element_count);
-
- if ((! vector->data) && (vector->element_count)) {
- // Handle or output error somehow?
- puts("vector_init");
- exit(EXIT_FAILURE);
- }
-
- memset(vector->data,
- 0,
- vector->element_size * vector->element_count);
- }
-
- void vector_push(vector_t * vector,
- void * data) {
- ++vector->element_count;
-
- vector->data = realloc(vector->data,
- vector->element_size * vector->element_count);
-
- if (! vector->data) {
- // Handle or output error somehow?
- puts("vector_push");
- exit(EXIT_FAILURE);
- }
-
- memcpy(&vector->data[(vector->element_count - 1) * vector->element_size],
- data,
- vector->element_size);
- }
-
- void vector_pop(vector_t * vector) {
- (void) vector;
- }
-
- void * vector_get(vector_t * vector,
- size_t element) {
- if (element >= vector->element_count) {
- // Handle or output error somehow?
- puts("vector_get");
- exit(EXIT_FAILURE);
- }
-
- return &vector->data[vector->element_size * element];
- }
-
- void vector_set(vector_t * vector,
- void * data,
- size_t element) {
- if (element >= vector->element_count) {
- // Handle or output error somehow?
- puts("vector_set");
- exit(EXIT_FAILURE);
- }
-
- memcpy(&vector->data[vector->element_size * element],
- data,
- vector->element_size);
- }
-
- void vector_free(vector_t * vector) {
- free(vector->data);
- }
-
- void example_print(example_t * example) {
- printf("a : %+i\n", example->a);
- printf("b : %+i\n", example->b);
- printf("c : %2s\n", example->c);
- }
-
- int main(void) {
- vector_t vector;
-
- example_t x = { 1, -1, "A" },
- y = { 2, -2, "B" },
- z = { 3, -3, "C" };
-
- vector_init(&vector, sizeof(example_t), 10);
-
- vector_set(&vector, &x, 0);
- vector_set(&vector, &y, 1);
- vector_set(&vector, &z, 2);
-
- example_print(vector_get(&vector, 0));
- example_print(vector_get(&vector, 1));
- example_print(vector_get(&vector, 2));
-
- vector_free(&vector);
-
- return (EXIT_SUCCESS);
- }
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