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| author | Bruce Hill <bruce@bruce-hill.com> | 2025-08-31 23:33:22 -0400 |
|---|---|---|
| committer | Bruce Hill <bruce@bruce-hill.com> | 2025-08-31 23:33:22 -0400 |
| commit | 5fc7577b5a3bc2c445522dfd5b287e1c6eddc3e9 (patch) | |
| tree | 34d44c9330dc3ec71fc850b95b3412a1ce292cb8 /src/stdlib/lists.h | |
| parent | a571ccffd795a595e990a3405dcf977aafc33c6c (diff) | |
Switch to using optional return values for list indexing.
Diffstat (limited to 'src/stdlib/lists.h')
| -rw-r--r-- | src/stdlib/lists.h | 47 |
1 files changed, 16 insertions, 31 deletions
diff --git a/src/stdlib/lists.h b/src/stdlib/lists.h index 1ba46222..74314aa6 100644 --- a/src/stdlib/lists.h +++ b/src/stdlib/lists.h @@ -10,26 +10,19 @@ #include "util.h" // Convert negative indices to back-indexed without branching: index0 = index + (index < 0)*(len+1)) - 1 -#define List_get(item_type, arr_expr, index_expr, start, end) \ - *({ \ - const List_t list = arr_expr; \ +#define List_get(list_expr, index_expr, item_type, var, optional_expr, none_expr) \ + ({ \ + const List_t list = list_expr; \ int64_t index = index_expr; \ - int64_t off = index + (index < 0) * (list.length + 1) - 1; \ - if (unlikely(off < 0 || off >= list.length)) \ - fail_source(__SOURCE_FILE__, start, end, "Invalid list index: ", index, " (list has length ", \ - (int64_t)list.length, ")\n"); \ - (item_type *)(list.data + list.stride * off); \ + int64_t offset = index + (index < 0) * (list.length + 1) - 1; \ + unlikely(offset < 0 || offset >= list.length) ? none_expr : ({ \ + item_type var = *(item_type *)(list.data + list.stride * offset); \ + optional_expr; \ + }); \ }) -#define List_get_unchecked(type, x, i) \ +#define List_lvalue(item_type, list_expr, index_expr, start, end) \ *({ \ - const List_t list = x; \ - int64_t index = i; \ - int64_t off = index + (index < 0) * (list.length + 1) - 1; \ - (type *)(list.data + list.stride * off); \ - }) -#define List_lvalue(item_type, arr_expr, index_expr, start, end) \ - *({ \ - List_t *list = arr_expr; \ + List_t *list = list_expr; \ int64_t index = index_expr; \ int64_t off = index + (index < 0) * (list->length + 1) - 1; \ if (unlikely(off < 0 || off >= list->length)) \ @@ -38,15 +31,7 @@ if (list->data_refcount > 0) List$compact(list, sizeof(item_type)); \ (item_type *)(list->data + list->stride * off); \ }) -#define List_lvalue_unchecked(item_type, arr_expr, index_expr) \ - *({ \ - List_t *list = arr_expr; \ - int64_t index = index_expr; \ - int64_t off = index + (index < 0) * (list->length + 1) - 1; \ - if (list->data_refcount > 0) List$compact(list, sizeof(item_type)); \ - (item_type *)(list->data + list->stride * off); \ - }) -#define List_set(item_type, list, index, value, start, end) List_lvalue(item_type, arr_expr, index, start, end) = value +#define List_set(item_type, list, index, value, start, end) List_lvalue(item_type, list_expr, index, start, end) = value #define is_atomic(x) \ _Generic(x, \ bool: true, \ @@ -103,9 +88,9 @@ void List$remove_item(List_t *list, void *item, Int_t max_removals, const TypeIn #define List$remove_item_value(list, item_expr, max, type) \ List$remove_item(list, (__typeof(item_expr)[1]){item_expr}, max, type) -#define List$pop(arr_expr, index_expr, item_type, nonnone_var, nonnone_expr, none_expr) \ +#define List$pop(list_expr, index_expr, item_type, nonnone_var, nonnone_expr, none_expr) \ ({ \ - List_t *list = arr_expr; \ + List_t *list = list_expr; \ Int_t index = index_expr; \ int64_t index64 = Int64$from_int(index, false); \ int64_t off = index64 + (index64 < 0) * (list->length + 1) - 1; \ @@ -131,9 +116,9 @@ List_t List$shuffled(List_t list, OptionalClosure_t random_int64, int64_t padded void *List$random(List_t list, OptionalClosure_t random_int64); #define List$random_value(list, random_int64, t) \ ({ \ - List_t _arr = list; \ - if (_arr.length == 0) fail("Cannot get a random value from an empty list!"); \ - *(t *)List$random(_arr, random_int64); \ + List_t _list_expr = list; \ + if (_list_expr.length == 0) fail("Cannot get a random value from an empty list!"); \ + *(t *)List$random(_list_expr, random_int64); \ }) List_t List$sample(List_t list, Int_t n, List_t weights, Closure_t random_num, int64_t padded_item_size); Table_t List$counts(List_t list, const TypeInfo_t *type); |