Magisk/core/jni/utils/vector.c
2017-12-04 15:16:41 +08:00

68 lines
1.5 KiB
C

/* vector.c - A simple vector implementation in c
*/
#include <stdlib.h>
#include <string.h>
#include "vector.h"
void vec_init(struct vector *v) {
if (v == NULL) return;
vec_size(v) = 0;
vec_cap(v) = 1;
vec_entry(v) = malloc(sizeof(void*));
}
void vec_push_back(struct vector *v, void *p) {
if (v == NULL) return;
if (vec_size(v) == vec_cap(v)) {
vec_cap(v) *= 2;
vec_entry(v) = realloc(vec_entry(v), sizeof(void*) * vec_cap(v));
}
vec_entry(v)[vec_size(v)] = p;
++vec_size(v);
}
void *vec_pop_back(struct vector *v) {
void *ret = vec_entry(v)[vec_size(v) - 1];
--vec_size(v);
return ret;
}
void vec_sort(struct vector *v, int (*compar)(const void *, const void *)) {
if (v == NULL) return;
qsort(vec_entry(v), vec_size(v), sizeof(void*), compar);
}
/* Will cleanup only the vector itself
* use in cases when each element requires special cleanup
*/
void vec_destroy(struct vector *v) {
if (v == NULL) return;
vec_size(v) = 0;
vec_cap(v) = 0;
free(vec_entry(v));
vec_entry(v) = NULL; // Prevent double destroy segfault
}
/* Will cleanup each element AND the vector itself
* Shall be the general case
*/
void vec_deep_destroy(struct vector *v) {
if (v == NULL) return;
void *e;
vec_for_each(v, e) {
free(e);
}
vec_destroy(v);
}
struct vector *vec_dup(struct vector *v) {
struct vector *ret = malloc(sizeof(*ret));
vec_size(ret) = vec_size(v);
vec_cap(ret) = vec_cap(v);
vec_entry(v) = malloc(sizeof(void*) * vec_cap(ret));
memcpy(vec_entry(ret), vec_entry(v), sizeof(void*) * vec_cap(ret));
return ret;
}