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game/shared/usermessages.cpp

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+//========= Copyright Valve Corporation, All rights reserved. ============//
+//
+// Purpose: 
+//
+//=============================================================================//
+
+#include "cbase.h"
+#include "usermessages.h"
+#include <bitbuf.h>
+
+// memdbgon must be the last include file in a .cpp file!!!
+#include "tier0/memdbgon.h"
+
+void RegisterUserMessages( void );
+
+//-----------------------------------------------------------------------------
+// Purpose: Force registration on .dll load
+// FIXME:  Should this be a client/server system?
+//-----------------------------------------------------------------------------
+CUserMessages::CUserMessages()
+{
+	// Game specific registration function;
+	RegisterUserMessages();
+}
+
+CUserMessages::~CUserMessages()
+{
+	int c = m_UserMessages.Count();
+	for ( int i = 0; i < c; ++i )
+	{
+		delete m_UserMessages[ i ];
+	}
+	m_UserMessages.RemoveAll();
+}
+
+//-----------------------------------------------------------------------------
+// Purpose: 
+// Input  : *name - 
+// Output : int
+//-----------------------------------------------------------------------------
+int CUserMessages::LookupUserMessage( const char *name )
+{
+	int idx = m_UserMessages.Find( name );
+	if ( idx == m_UserMessages.InvalidIndex() )
+	{
+		return -1;
+	}
+
+	return idx;
+}
+
+//-----------------------------------------------------------------------------
+// Purpose: 
+// Input  : index - 
+// Output : int
+//-----------------------------------------------------------------------------
+int CUserMessages::GetUserMessageSize( int index )
+{
+	if ( index < 0 || index >= (int)m_UserMessages.Count() )
+	{
+		Error( "CUserMessages::GetUserMessageSize( %i ) out of range!!!\n", index );
+	}
+
+	CUserMessage *e = m_UserMessages[ index ];
+	return e->size;
+}
+
+//-----------------------------------------------------------------------------
+// Purpose: 
+// Input  : index - 
+// Output : char const
+//-----------------------------------------------------------------------------
+const char *CUserMessages::GetUserMessageName( int index )
+{
+	if ( index < 0 || index >= (int)m_UserMessages.Count() )
+	{
+		Error( "CUserMessages::GetUserMessageSize( %i ) out of range!!!\n", index );
+	}
+
+	return m_UserMessages.GetElementName( index );
+}
+
+//-----------------------------------------------------------------------------
+// Purpose: 
+// Input  : index - 
+// Output : Returns true on success, false on failure.
+//-----------------------------------------------------------------------------
+bool CUserMessages::IsValidIndex( int index )
+{
+	return m_UserMessages.IsValidIndex( index );
+}
+
+//-----------------------------------------------------------------------------
+// Purpose: 
+// Input  : *name - 
+//			size - -1 for variable size
+//-----------------------------------------------------------------------------
+void CUserMessages::Register( const char *name, int size )
+{
+	Assert( name );
+	int idx = m_UserMessages.Find( name );
+	if ( idx != m_UserMessages.InvalidIndex() )
+	{
+		Error( "CUserMessages::Register '%s' already registered\n", name );
+	}
+
+	CUserMessage * entry = new CUserMessage;
+	entry->size = size;
+	entry->name = name;
+
+	m_UserMessages.Insert( name, entry );
+}
+
+//-----------------------------------------------------------------------------
+// Purpose: 
+// Input  : *name - 
+//			hook - 
+//-----------------------------------------------------------------------------
+void CUserMessages::HookMessage( const char *name, pfnUserMsgHook hook )
+{
+#if defined( CLIENT_DLL )
+	Assert( name );
+	Assert( hook );
+
+	int idx = m_UserMessages.Find( name );
+	if ( idx == m_UserMessages.InvalidIndex() )
+	{
+		DevMsg( "CUserMessages::HookMessage:  no such message %s\n", name );
+		Assert( 0 );
+		return;
+	}
+
+	int i = m_UserMessages[ idx ]->clienthooks.AddToTail();
+	m_UserMessages[ idx ]->clienthooks[i] = hook;
+
+#else
+	Error( "CUserMessages::HookMessage called from server code!!!\n" );
+#endif
+}
+
+//-----------------------------------------------------------------------------
+// Purpose: 
+// Input  : *pszName - 
+//			iSize - 
+//			*pbuf - 
+// Output : Returns true on success, false on failure.
+//-----------------------------------------------------------------------------
+bool CUserMessages::DispatchUserMessage( int msg_type, bf_read &msg_data )
+{
+#if defined( CLIENT_DLL )
+	if ( msg_type < 0 || msg_type >= (int)m_UserMessages.Count() )
+	{
+		DevMsg( "CUserMessages::DispatchUserMessage:  Bogus msg type %i (max == %i)\n", msg_type, m_UserMessages.Count() );
+		Assert( 0 );
+		return false;
+	}
+
+	CUserMessage *entry = m_UserMessages[ msg_type ];
+
+	if ( !entry )
+	{
+		DevMsg( "CUserMessages::DispatchUserMessage:  Missing client entry for msg type %i\n", msg_type );
+		Assert( 0 );
+		return false;
+	}
+
+	if ( entry->clienthooks.Count() == 0 )
+	{
+		DevMsg( "CUserMessages::DispatchUserMessage:  missing client hook for %s\n", GetUserMessageName(msg_type) );
+		Assert( 0 );
+		return false;
+	}
+
+	for (int i = 0; i < entry->clienthooks.Count(); i++  )
+	{
+		bf_read msg_copy = msg_data;
+
+		pfnUserMsgHook hook = entry->clienthooks[i];
+		(*hook)( msg_copy );
+	}
+	return true;
+#else
+	Error( "CUserMessages::DispatchUserMessage called from server code!!!\n" );
+	return false;
+#endif
+}
+
+// Singleton
+static CUserMessages g_UserMessages;
+// Expose to rest of .dll
+CUserMessages *usermessages = &g_UserMessages;