From c6736649a493b37463e81ac8379c4ce1b2629652 Mon Sep 17 00:00:00 2001
From: Kelly Kinkade <kelly.lynn.martin@gmail.com>
Date: Sat, 15 Nov 2025 19:01:52 -0600
Subject: [PATCH] df structure support

implement `operator==`, `operator<`, and `std::hash` for `labor_kitchen_interface_food_key`
---
 library/include/df/custom/.gitignore             |  1 +
 .../hash/labor_kitchen_interface_food_key.h      | 16 ++++++++++++++++
 .../labor_kitchen_interface_food_key.custom.inc  | 11 +++++++++++
 3 files changed, 28 insertions(+)
 create mode 100644 library/include/df/custom/.gitignore
 create mode 100644 library/include/df/custom/hash/labor_kitchen_interface_food_key.h
 create mode 100644 library/include/df/custom/labor_kitchen_interface_food_key.custom.inc

diff --git a/library/include/df/custom/.gitignore b/library/include/df/custom/.gitignore
new file mode 100644
index 0000000000..96e79c167d
--- /dev/null
+++ b/library/include/df/custom/.gitignore
@@ -0,0 +1 @@
+!*.h
diff --git a/library/include/df/custom/hash/labor_kitchen_interface_food_key.h b/library/include/df/custom/hash/labor_kitchen_interface_food_key.h
new file mode 100644
index 0000000000..3ca9676725
--- /dev/null
+++ b/library/include/df/custom/hash/labor_kitchen_interface_food_key.h
@@ -0,0 +1,16 @@
+template<>
+struct std::hash<labor_kitchen_interface_food_key> {
+    auto operator()(const labor_kitchen_interface_food_key &a) const -> size_t {
+        struct thing {
+            int16_t t;
+            int16_t st;
+            int32_t x;
+        } thing{
+            .t = a.type;
+            .st = a.subtype,
+            .x = static_cast<int32_t>(a.mat) ^ (static_cast<int32_t>(a.matg))
+        };
+
+        return hash<int64_t>()(bit_cast<int64_t>(thing));
+        }
+    };
diff --git a/library/include/df/custom/labor_kitchen_interface_food_key.custom.inc b/library/include/df/custom/labor_kitchen_interface_food_key.custom.inc
new file mode 100644
index 0000000000..59796a69ba
--- /dev/null
+++ b/library/include/df/custom/labor_kitchen_interface_food_key.custom.inc
@@ -0,0 +1,11 @@
+    bool operator<(const labor_kitchen_interface_food_key &b) const {
+        if (type<b.type) return true;
+        if (subtype<b.subtype) return true;
+        if (mat<b.mat) return true;
+        if (matg<b.matg) return true;
+        return false;
+        }
+
+    bool operator==(const labor_kitchen_interface_food_key &b) const {
+        return type==b.type&&subtype==b.subtype&&mat==b.mat&&matg==b.matg;
+        }