1 files changed, 51 insertions, 0 deletions

diff --git a/src/allocator.cpp b/src/allocator.cpp
new file mode 100644
index 0000000..84acde5
--- /dev/null
+++ b/src/allocator.cpp
@@ -0,0 +1,51 @@
+/*
+ * ALLOCATOR.CPP                  Copyright (c) 2017-2024, Benoit Germain
+ */
+
+/*
+===============================================================================
+
+Copyright (C) 2017-2024 Benoit Germain <bnt.germain@gmail.com>
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.
+
+===============================================================================
+*/
+
+#include "_pch.hpp"
+#include "allocator.hpp"
+
+namespace lanes
+{
+    AllocatorDefinition& AllocatorDefinition::Validated(lua_State* const L_, StackIndex const idx_)
+    {
+        lanes::AllocatorDefinition* const _def{ luaG_tofulluserdata<lanes::AllocatorDefinition>(L_, idx_) };
+        // raise an error and don't return if the full userdata at the specified index is not a valid AllocatorDefinition
+        if (!_def) {
+            raise_luaL_error(L_, "Bad config.allocator function, provided value is not a userdata");
+        }
+        if (lua_rawlen(L_, idx_) < sizeof(lanes::AllocatorDefinition)) {
+            raise_luaL_error(L_, "Bad config.allocator function, provided value is too small to contain a valid AllocatorDefinition");
+        }
+        if (_def->version != kAllocatorVersion) {
+            raise_luaL_error(L_, "Bad config.allocator function, AllocatorDefinition version mismatch");
+        }
+        return *_def;
+    }
+}