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utils/dynarr: add dynarr_truncate

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Signed-off-by: Yuxuan Shui <yshuiv7@gmail.com>
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Yuxuan Shui 2024-06-05 18:33:59 +01:00
parent c2cb4df94a
commit 43e0a99259
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1 changed files with 10 additions and 5 deletions
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15
src/utils/dynarr.h
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@ -131,17 +131,22 @@ static inline void dynarr_remove_swap_impl(size_t size, void *arr, size_t idx) {
/// Return whether the array is empty
#define dynarr_is_empty(arr) (dynarr_len(arr) == 0)
/// Clear the array, destructing each element with `dtor`.
#define dynarr_clear(arr, dtor) \
/// Reduce the length of the array to `n`, destructing each element with `dtor`. If `n`
/// is greater than the current length, this does nothing.
#define dynarr_truncate(arr, n, dtor) \
do { \
if ((dtor) != NULL) { \
for (size_t i = 0; i < dynarr_len(arr); i++) { \
for (size_t i = n; i < dynarr_len(arr); i++) { \
(dtor)((arr) + i); \
} \
} \
dynarr_len(arr) = 0; \
dynarr_len(arr) = n; \
} while (0)
#define dynarr_clear_pod(arr) dynarr_clear(arr, (void (*)(typeof(arr)))NULL)
#define dynarr_truncate_pod(arr, n) dynarr_truncate(arr, n, (void (*)(typeof(arr)))NULL)
/// Clear the array, destructing each element with `dtor`.
#define dynarr_clear(arr, dtor) dynarr_truncate(arr, 0, dtor)
#define dynarr_clear_pod(arr) dynarr_truncate_pod(arr, 0)
/// Extend the array by copying `n` elements from `other`
#define dynarr_extend_from(arr, other, n) \