Items: read ammo and inventory from the server arrays

The client m_iAmmo/m_hMyWeapons recv props still do not resolve, but the
listen server has the same CBaseCombatCharacter arrays in its datamap. Resolve
m_iAmmo and m_hMyWeapons there:
- reserve ammo comes from server_player_ammo() when the client array is
  missing, so full-ammo filtering works (RPG rockets at 3);
- the owned-weapon mask is filled from the server m_hMyWeapons[48] handles,
  so fallen weapons count as ammo before the player equips them.
Widen the datamap field-size filter to 512 for the 192-byte handle array.

1 files changed, 32 insertions, 3 deletions

diff --git a/src/server.cpp b/src/server.cpp
index 1313f00..af0a8ff 100644
--- a/src/server.cpp
+++ b/src/server.cpp
@@ -58,6 +58,8 @@ static int g_srv_mapname = -1;
 static int g_srv_armor = -1;
 static int g_srv_detonate = -1;
 static int g_srv_grenade_radius = -1;
+static int g_srv_ammo = -1;
+static int g_srv_myweapons = -1;
 static bool g_srv_ready = false;
 static bool g_srv_checked = false;
 
@@ -97,7 +99,7 @@ static int datamap_offset(const char *name, int want_type, int min_off = 0x40,
         continue;
       if (foff < min_off || foff > max_off)
         continue;
-      if (fsize < 1 || fsize > 128)
+      if (fsize < 1 || fsize > 512)
         continue;
       // DEFINE_KEYFIELD entries have an external name ("health"); plain
       // DEFINE_FIELD entries have none. Either way it must be in server.so.
@@ -160,17 +162,22 @@ bool resolve_server_netvars() {
   // CBaseGrenade fuse / blast radius (m_flDetonateTime is not networked).
   g_srv_detonate = datamap_offset("m_flDetonateTime", FIELD_TIME);
   g_srv_grenade_radius = datamap_offset("m_DmgRadius", FIELD_FLOAT);
+  // CBaseCombatCharacter arrays: ammo counts and the weapon handle list.
+  g_srv_ammo = datamap_offset("m_iAmmo", FIELD_INTEGER, 0x40, 0x4000);
+  g_srv_myweapons = datamap_offset("m_hMyWeapons", FIELD_EHANDLE);
   g_srv_ready = g_srv_health > 0;
   if (g_srv_ready) {
     logf("server datamap (%s): health=%d maxhealth=%d lifeste=%d "
          "modelindex=%d absvel=%d vel=%d activeweapon=%d relationship=%d "
          "followtarget=%d spawnflags=%d hacked=%d npcstate=%d "
-         "takedamage=%d mapname=%d armor=%d detonate=%d dmgradius=%d",
+         "takedamage=%d mapname=%d armor=%d detonate=%d dmgradius=%d "
+         "ammo=%d myweapons=%d",
          g_server.path.c_str(), g_srv_health, g_srv_maxhealth, g_srv_lifestate,
          g_srv_modelindex, g_srv_absvelocity, g_srv_velocity,
          g_srv_activeweapon, g_srv_relationship, g_srv_followtarget,
          g_srv_spawnflags, g_srv_hacked, g_srv_npcstate, g_srv_takedamage,
-         g_srv_mapname, g_srv_armor, g_srv_detonate, g_srv_grenade_radius);
+         g_srv_mapname, g_srv_armor, g_srv_detonate, g_srv_grenade_radius,
+         g_srv_ammo, g_srv_myweapons);
     fail_logged = false;
   } else if (!fail_logged) {
     fail_logged = true;
@@ -475,6 +482,28 @@ float server_grenade_radius(int idx) {
   return *(float *)((uintptr_t)base + g_srv_grenade_radius);
 }
 
+// Server-side CBaseCombatCharacter::m_iAmmo array (reserve ammo).
+int server_player_ammo(int idx, int type) {
+  if (!g_srv_ready || g_srv_ammo < 0 || type < 0 || type >= 32)
+    return -1;
+  void *base = nullptr;
+  server_entity_health(idx, nullptr, nullptr, &base);
+  if (!base)
+    return -1;
+  return *(int *)((uintptr_t)base + g_srv_ammo + type * 4);
+}
+
+// Server-side m_hMyWeapons[48] handle for one inventory slot (0 if empty).
+uint32_t server_player_weapon(int idx, int slot) {
+  if (!g_srv_ready || g_srv_myweapons < 0 || slot < 0 || slot >= 48)
+    return 0;
+  void *base = nullptr;
+  server_entity_health(idx, nullptr, nullptr, &base);
+  if (!base)
+    return 0;
+  return *(uint32_t *)((uintptr_t)base + g_srv_myweapons + slot * 4);
+}
+
 // Entity index of the player's active weapon from the authoritative server
 // entity. Used as a fallback if the client m_hActiveWeapon netvar is missing.
 int server_active_weapon(int idx) {