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util/array: add array_remove_at
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2 changed files with 15 additions and 0 deletions
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@ -4,6 +4,7 @@
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#include <stdint.h>
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#include <stdlib.h>
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#include <stdbool.h>
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#include <wayland-util.h>
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size_t push_zeroes_to_end(uint32_t arr[], size_t n);
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@ -21,4 +22,9 @@ bool set_add(uint32_t values[], size_t *len, size_t cap, uint32_t target);
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*/
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bool set_remove(uint32_t values[], size_t *len, size_t cap, uint32_t target);
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/**
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* Remove a chunk of memory of the specified size at the specified offset.
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*/
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void array_remove_at(struct wl_array *arr, size_t offset, size_t size);
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#endif
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@ -1,5 +1,6 @@
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#include "util/array.h"
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#include <assert.h>
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#include <string.h>
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// https://www.geeksforgeeks.org/move-zeroes-end-array/
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size_t push_zeroes_to_end(uint32_t arr[], size_t n) {
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@ -46,3 +47,11 @@ bool set_remove(uint32_t values[], size_t *len, size_t cap, uint32_t target) {
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}
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return false;
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}
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void array_remove_at(struct wl_array *arr, size_t offset, size_t size) {
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assert(arr->size >= offset + size);
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char *data = arr->data;
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memmove(&data[offset], &data[offset + size], arr->size - offset - size);
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arr->size -= size;
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}
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