Buffer work

src/basic/basic.h

@@ -493,7 +493,7 @@ Array<T> Copy(Allocator alo, Array<T> array) {
 template <class T>
 Array<T> TightCopy(Allocator alo, Array<T> array) {
     Array<T> result = {alo};
-    result.reserve(array.len);
+    Reserve(&result, array.len);
     memcpy(result.data, array.data, sizeof(T) * array.len);
     result.len = array.len;
     return result;
@@ -526,6 +526,24 @@ void RemoveByIndex(Array<T> *arr, int64_t index) {
     arr->len -= 1;
 }
 
+template <class T>
+void RemoveManyByIndex(Array<T> *arr, int64_t index, int64_t count) {
+    if (count == 0) return;
+    Assert(index >= 0 && index < arr->len);
+    Assert((index + count) > 0 && (index + count) <= arr->len);
+    int64_t right_len = arr->len - index - count;
+    memmove(arr->data + index, arr->data + index + count, right_len * sizeof(T));
+    arr->len -= count;
+}
+
+template <class T>
+void RemoveMany(Array<T> *arr, T &item, int64_t count) {
+    Assert(arr->len > 0);
+    Assert(&item >= arr->begin() && &item < arr->end());
+    int64_t index = GetIndex(*arr, item);
+    RemoveManyByIndex(arr, index, count);
+}
+
 template <class T>
 void Remove(Array<T> *arr, T &item) {
     Assert(arr->len > 0);