diff options
Diffstat (limited to 'util/arr.c')
| -rw-r--r-- | util/arr.c | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/util/arr.c b/util/arr.c new file mode 100644 index 0000000..7595b4b --- /dev/null +++ b/util/arr.c @@ -0,0 +1,28 @@ +#define arr_declaration(arr_type, type, prefix) typedef struct { \ + type *data; \ + size_t cap; \ + size_t len; \ + } arr_type; \ + static void prefix##create(arr_type *arr) { \ + arr->data = NULL; \ + arr->cap = 0; \ + arr->len = 0; \ + } \ + static void prefix##reserve(arr_type *arr, size_t n) { \ + arr->data = err_realloc(arr->data, n * sizeof(*arr->data)); \ + arr->cap = n; \ + } \ + static void prefix##add(arr_type *arr, type *item) { \ + if (arr->len >= arr->cap) { \ + prefix##reserve(arr, 2 * arr->len + 2); \ + } \ + arr->data[arr->len++] = *item; \ + } \ + static void prefix##clear(arr_type *arr) { \ + free(arr->data); \ + arr->data = NULL; \ + arr->cap = 0; \ + arr->len = 0; \ + } + +#define arr_foreach(arr, type, var) for (type *var = (arr).data, *arr_iterate_last_ = (arr).data + ((arr).len - 1); var; (var == arr_iterate_last_) ? var = NULL : var++) |