From 3dd7854076c5f49032ad520dc56769faa1c35d08 Mon Sep 17 00:00:00 2001
From: Bruce Hill <bruce@bruce-hill.com>
Date: Sun, 22 Dec 2024 15:53:26 -0500
Subject: Add optimized metamethods for enums and structs that hold packed data

---
 stdlib/structs.c | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

(limited to 'stdlib/structs.c')

diff --git a/stdlib/structs.c b/stdlib/structs.c
index 010b49f7..1ff5a918 100644
--- a/stdlib/structs.c
+++ b/stdlib/structs.c
@@ -53,6 +53,14 @@ PUREFUNC public uint64_t Struct$hash(const void *obj, const TypeInfo_t *type)
 }
 #pragma GCC diagnostic pop
 
+PUREFUNC public uint64_t PackedData$hash(const void *obj, const TypeInfo_t *type)
+{
+    if (type->StructInfo.num_fields == 0)
+        return 0;
+
+    return siphash24(obj, (size_t)type->size);
+}
+
 PUREFUNC public int32_t Struct$compare(const void *x, const void *y, const TypeInfo_t *type)
 {
     if (x == y)
@@ -122,6 +130,12 @@ PUREFUNC public bool Struct$equal(const void *x, const void *y, const TypeInfo_t
     return true;
 }
 
+PUREFUNC public bool PackedData$equal(const void *x, const void *y, const TypeInfo_t *type)
+{
+    if (x == y) return true;
+    return (memcmp(x, y, (size_t)type->size) == 0);
+}
+
 PUREFUNC public Text_t Struct$as_text(const void *obj, bool colorize, const TypeInfo_t *type)
 {
     if (!obj) return Text$from_str(type->StructInfo.name);
-- 
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