From 201e1dace88941c841a9211c0e081fb21dc89577 Mon Sep 17 00:00:00 2001
From: TimePath <andrew.hardaker1995@gmail.com>
Date: Sun, 25 Dec 2016 17:14:07 +1100
Subject: [PATCH 1/1] Inventory: expand capacity

---
 qcsrc/common/items/all.qh       |  2 +-
 qcsrc/common/items/inventory.qh | 76 +++++++++++++++++++++++++++------
 2 files changed, 64 insertions(+), 14 deletions(-)

diff --git a/qcsrc/common/items/all.qh b/qcsrc/common/items/all.qh
index d377776cd5..dc8cf21c02 100644
--- a/qcsrc/common/items/all.qh
+++ b/qcsrc/common/items/all.qh
@@ -4,7 +4,7 @@
 
 #include "item.qh"
 
-REGISTRY(Items, BITS(5))
+REGISTRY(Items, BITS(7))
 #define Items_from(i) _Items_from(i, NULL)
 REGISTER_REGISTRY(Items)
 #define REGISTER_ITEM(id, class) REGISTER(Items, ITEM, id, m_id, NEW(class))
diff --git a/qcsrc/common/items/inventory.qh b/qcsrc/common/items/inventory.qh
index 811f716fb8..a022979a70 100644
--- a/qcsrc/common/items/inventory.qh
+++ b/qcsrc/common/items/inventory.qh
@@ -15,17 +15,33 @@ ENDCLASS(Inventory)
 
 REGISTER_NET_LINKED(ENT_CLIENT_INVENTORY)
 
+const int Inventory_groups_major = 16;
+const int Inventory_groups_minor = 8; // ceil(Items_MAX / Inventory_groups_major)
+
+#define G_MAJOR(id) (floor((id) / Inventory_groups_minor))
+#define G_MINOR(id) ((id) % Inventory_groups_minor)
+
 #ifdef CSQC
 NET_HANDLE(ENT_CLIENT_INVENTORY, bool isnew)
 {
     make_pure(this);
-    const int bits = ReadInt24_t();
-    FOREACH(Items, bits & BIT(it.m_id), {
-        .int fld = inv_items[it.m_id];
-        int prev = this.(fld);
-        int next = this.(fld) = ReadByte();
-        LOG_TRACEF("%s: %.0f -> %.0f", it.m_name, prev, next);
-    });
+    const int majorBits = ReadShort();
+    for (int i = 0; i < Inventory_groups_major; ++i) {
+        if (!(majorBits & BIT(i))) {
+            continue;
+        }
+        const int minorBits = ReadByte();
+        for (int j = 0; j < Inventory_groups_minor; ++j) {
+            if (!(minorBits & BIT(j))) {
+                continue;
+            }
+            const GameItem it = Items_from(Inventory_groups_minor * i + j);
+            .int fld = inv_items[it.m_id];
+            int prev = this.(fld);
+            int next = this.(fld) = ReadByte();
+            LOG_TRACEF("%s: %.0f -> %.0f", it.m_name, prev, next);
+        }
+    }
     return true;
 }
 #endif
@@ -34,22 +50,56 @@ NET_HANDLE(ENT_CLIENT_INVENTORY, bool isnew)
 void Inventory_Write(Inventory data)
 {
     if (!data) {
-        WriteInt24_t(MSG_ENTITY, 0);
+        WriteShort(MSG_ENTITY, 0);
         return;
     }
     TC(Inventory, data);
-    int bits = 0;
+
+    int majorBits = 0;
     FOREACH(Items, true, {
         .int fld = inv_items[it.m_id];
-        bits = BITSET(bits, BIT(it.m_id), data.inventory.(fld) != (data.inventory.(fld) = data.(fld)));
+        const bool changed = data.inventory.(fld) != data.(fld);
+        if (changed) {
+            majorBits = BITSET(majorBits, BIT(G_MAJOR(it.m_id)), true);
+        }
     });
-    WriteInt24_t(MSG_ENTITY, bits);
-    FOREACH(Items, bits & BIT(it.m_id), {
-        WriteByte(MSG_ENTITY, data.inv_items[it.m_id]);
+    WriteShort(MSG_ENTITY, majorBits);
+
+    int minorBits = 0;
+    int lastMaj = 0;
+    int maj = 0;
+    FOREACH(Items, majorBits & BIT(maj = G_MAJOR(it.m_id)), {
+        .int fld = inv_items[it.m_id];
+        const bool changed = data.inventory.(fld) != (data.inventory.(fld) = data.(fld));
+        if (changed) {
+            if (maj != lastMaj) {
+                lastMaj = maj;
+#define X() MACRO_BEGIN \
+    if (minorBits) { \
+        WriteByte(MSG_ENTITY, minorBits); \
+        for (int j = 0; j < Inventory_groups_minor; ++j) { \
+            if (!(minorBits & BIT(j))) { \
+                continue; \
+            } \
+            const GameItem it = Items_from(Inventory_groups_minor * maj + j); \
+            WriteByte(MSG_ENTITY, data.inv_items[it.m_id]); \
+        } \
+    } \
+MACRO_END
+                X();
+                minorBits = 0;
+            }
+            minorBits = BITSET(minorBits, BIT(G_MINOR(it.m_id)), true);
+        }
     });
+    X();
+#undef X
 }
 #endif
 
+#undef G_MAJOR
+#undef G_MINOR
+
 #ifdef SVQC
 bool Inventory_Send(Inventory this, Client to, int sf)
 {
-- 
2.39.2