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util/array: add array_remove_at

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This commit is contained in:
Simon Ser 2021-07-01 09:57:30 +02:00 committed by Simon Zeni
parent dbb0e2f75b
commit a6ed4ae308
2 changed files with 15 additions and 0 deletions
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6
include/util/array.h
View File

@ -4,6 +4,7 @@
#include <stdint.h>
#include <stdlib.h>
#include <stdbool.h>
#include <wayland-util.h>
size_t push_zeroes_to_end(uint32_t arr[], size_t n);
@ -21,4 +22,9 @@ bool set_add(uint32_t values[], size_t *len, size_t cap, uint32_t target);
*/
bool set_remove(uint32_t values[], size_t *len, size_t cap, uint32_t target);
/**
* Remove a chunk of memory of the specified size at the specified offset.
*/
void array_remove_at(struct wl_array *arr, size_t offset, size_t size);
#endif

9
util/array.c
View File

@ -1,5 +1,6 @@
#include "util/array.h"
#include <assert.h>
#include <string.h>
// https://www.geeksforgeeks.org/move-zeroes-end-array/
size_t push_zeroes_to_end(uint32_t arr[], size_t n) {
@ -46,3 +47,11 @@ bool set_remove(uint32_t values[], size_t *len, size_t cap, uint32_t target) {
}
return false;
}
void array_remove_at(struct wl_array *arr, size_t offset, size_t size) {
assert(arr->size >= offset + size);
char *data = arr->data;
memmove(&data[offset], &data[offset + size], arr->size - offset - size);
arr->size -= size;
}