Generic CAO cleanups and renames for clarification

* Use enum for GENERIC_CMD_*
* Rename m_attachements to attachement_parent_ids (public member and clearer name)
* Rename GENERIC_CMD_SET_ATTACHMENT to GENERIC_CMD_ATTACH_TO
* USHRT_MAX + 1 buffer sizes to prevent overflows as @kahrl suggested
* Remove unneccessary m_id from GenericCAO (shadowing protected superclass member for no reason) as @kahrl suggested

src/content_cao.cpp

@@ -543,7 +543,6 @@ GenericCAO::GenericCAO(IGameDef *gamedef, ClientEnvironment *env):
 		//
 		m_is_player(false),
 		m_is_local_player(false),
-		m_id(0),
 		//
 		m_smgr(NULL),
 		m_irr(NULL),
@@ -747,7 +746,7 @@ ClientActiveObject* GenericCAO::getParent()
 {
 	ClientActiveObject *obj = NULL;
 
-	u16 attached_id = m_env->m_attachements[getId()];
+	u16 attached_id = m_env->attachement_parent_ids[getId()];
 
 	if ((attached_id != 0) &&
 			(attached_id != getId())) {
@@ -764,12 +763,12 @@ void GenericCAO::removeFromScene(bool permanent)
 		for(std::vector<u16>::iterator ci = m_children.begin();
 						ci != m_children.end(); ci++)
 		{
-			if (m_env->m_attachements[*ci] == getId()) {
-				m_env->m_attachements[*ci] = 0;
+			if (m_env->attachement_parent_ids[*ci] == getId()) {
+				m_env->attachement_parent_ids[*ci] = 0;
 			}
 		}
 
-		m_env->m_attachements[getId()] = 0;
+		m_env->attachement_parent_ids[getId()] = 0;
 
 		LocalPlayer* player = m_env->getLocalPlayer();
 		if (this == player->parent) {
@@ -1111,7 +1110,7 @@ void GenericCAO::step(float dtime, ClientEnvironment *env)
 		for(std::vector<u16>::iterator ci = m_children.begin();
 				ci != m_children.end();)
 		{
-			if (m_env->m_attachements[*ci] != getId()) {
+			if (m_env->attachement_parent_ids[*ci] != getId()) {
 				ci = m_children.erase(ci);
 				continue;
 			}
@@ -1669,9 +1668,9 @@ void GenericCAO::processMessage(const std::string &data)
 		m_bone_position[bone] = core::vector2d<v3f>(position, rotation);
 
 		updateBonePosition();
-	} else if (cmd == GENERIC_CMD_SET_ATTACHMENT) {
+	} else if (cmd == GENERIC_CMD_ATTACH_TO) {
 		u16 parentID = readS16(is);
-		m_env->m_attachements[getId()] = parentID;
+		m_env->attachement_parent_ids[getId()] = parentID;
 		GenericCAO *parentobj = m_env->getGenericCAO(parentID);
 
 		if (parentobj) {

src/content_cao.h

@@ -60,7 +60,6 @@ private:
 	std::string m_name;
 	bool m_is_player;
 	bool m_is_local_player;
-	int m_id;
 	// Property-ish things
 	ObjectProperties m_prop;
 	//

src/environment.cpp

@@ -2009,7 +2009,7 @@ ClientEnvironment::ClientEnvironment(ClientMap *map, scene::ISceneManager *smgr,
 	m_irr(irr)
 {
 	char zero = 0;
-	memset(m_attachements, zero, sizeof(m_attachements));
+	memset(attachement_parent_ids, zero, sizeof(attachement_parent_ids));
 }
 
 ClientEnvironment::~ClientEnvironment()

src/environment.h

@@ -505,7 +505,7 @@ public:
 	// Get event from queue. CEE_NONE is returned if queue is empty.
 	ClientEnvEvent getClientEvent();
 
-	u16 m_attachements[USHRT_MAX];
+	u16 attachement_parent_ids[USHRT_MAX + 1];
 
 	std::list<std::string> getPlayerNames()
 	{ return m_player_names; }

src/genericobject.cpp

@@ -161,7 +161,7 @@ std::string gob_cmd_update_attachment(int parent_id, std::string bone, v3f posit
 {
 	std::ostringstream os(std::ios::binary);
 	// command 
-	writeU8(os, GENERIC_CMD_SET_ATTACHMENT);
+	writeU8(os, GENERIC_CMD_ATTACH_TO);
 	// parameters
 	writeS16(os, parent_id);
 	os<<serializeString(bone);

src/genericobject.h

@@ -24,17 +24,19 @@ with this program; if not, write to the Free Software Foundation, Inc.,
 #include "irrlichttypes_bloated.h"
 #include <iostream>
 
-#define GENERIC_CMD_SET_PROPERTIES 0
-#define GENERIC_CMD_UPDATE_POSITION 1
-#define GENERIC_CMD_SET_TEXTURE_MOD 2
-#define GENERIC_CMD_SET_SPRITE 3
-#define GENERIC_CMD_PUNCHED 4
-#define GENERIC_CMD_UPDATE_ARMOR_GROUPS 5
-#define GENERIC_CMD_SET_ANIMATION 6
-#define GENERIC_CMD_SET_BONE_POSITION 7
-#define GENERIC_CMD_SET_ATTACHMENT 8
-#define GENERIC_CMD_SET_PHYSICS_OVERRIDE 9
-#define GENERIC_CMD_UPDATE_NAMETAG_ATTRIBUTES 10
+enum GenericCMD {
+	GENERIC_CMD_SET_PROPERTIES,
+	GENERIC_CMD_UPDATE_POSITION,
+	GENERIC_CMD_SET_TEXTURE_MOD,
+	GENERIC_CMD_SET_SPRITE,
+	GENERIC_CMD_PUNCHED,
+	GENERIC_CMD_UPDATE_ARMOR_GROUPS,
+	GENERIC_CMD_SET_ANIMATION,
+	GENERIC_CMD_SET_BONE_POSITION,
+	GENERIC_CMD_ATTACH_TO,
+	GENERIC_CMD_SET_PHYSICS_OVERRIDE,
+	GENERIC_CMD_UPDATE_NAMETAG_ATTRIBUTES
+};
 
 #include "object_properties.h"
 std::string gob_cmd_set_properties(const ObjectProperties &prop);

src/mapblock.cpp

@@ -465,11 +465,11 @@ s16 MapBlock::getGroundLevel(v2s16 p2d)
 // sure we can handle all content ids. But it's absolutely worth it as it's
 // a speedup of 4 for one of the major time consuming functions on storing
 // mapblocks.
-static content_t getBlockNodeIdMapping_mapping[USHRT_MAX];
+static content_t getBlockNodeIdMapping_mapping[USHRT_MAX + 1];
 static void getBlockNodeIdMapping(NameIdMapping *nimap, MapNode *nodes,
 		INodeDefManager *nodedef)
 {
-	memset(getBlockNodeIdMapping_mapping, 0xFF, USHRT_MAX * sizeof(content_t));
+	memset(getBlockNodeIdMapping_mapping, 0xFF, (USHRT_MAX + 1) * sizeof(content_t));
 
 	std::set<content_t> unknown_contents;
 	content_t id_counter = 0;

src/network/networkprotocol.h

@@ -129,6 +129,7 @@ with this program; if not, write to the Free Software Foundation, Inc.,
 		Add TOCLIENT_HELLO for presenting server to client after client
 			presentation
 		Add TOCLIENT_AUTH_ACCEPT to accept connection from client
+		Rename GENERIC_CMD_SET_ATTACHMENT to GENERIC_CMD_ATTACH_TO
 */
 
 #define LATEST_PROTOCOL_VERSION 25