sv_init.c

quakeIII源码这个不用我多说吧

/*
===========================================================================
Copyright (C) 1999-2005 Id Software, Inc.

This file is part of Quake III Arena source code.

Quake III Arena source code is free software; you can redistribute it
and/or modify it under the terms of the GNU General Public License as
published by the Free Software Foundation; either version 2 of the License,
or (at your option) any later version.

Quake III Arena source code is distributed in the hope that it will be
useful, but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with Foobar; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
===========================================================================
*/

#include "server.h"

/*
===============
SV_SetConfigstring

===============
*/
void SV_SetConfigstring (int index, const char *val) {
	int		len, i;
	int		maxChunkSize = MAX_STRING_CHARS - 24;
	client_t	*client;

	if ( index < 0 || index >= MAX_CONFIGSTRINGS ) {
		Com_Error (ERR_DROP, "SV_SetConfigstring: bad index %i\n", index);
	}

	if ( !val ) {
		val = "";
	}

	// don't bother broadcasting an update if no change
	if ( !strcmp( val, sv.configstrings[ index ] ) ) {
		return;
	}

	// change the string in sv
	Z_Free( sv.configstrings[index] );
	sv.configstrings[index] = CopyString( val );

	// send it to all the clients if we aren't
	// spawning a new server
	if ( sv.state == SS_GAME || sv.restarting ) {

		// send the data to all relevent clients
		for (i = 0, client = svs.clients; i < sv_maxclients->integer ; i++, client++) {
			if ( client->state < CS_PRIMED ) {
				continue;
			}
			// do not always send server info to all clients
			if ( index == CS_SERVERINFO && client->gentity && (client->gentity->r.svFlags & SVF_NOSERVERINFO) ) {
				continue;
			}

			len = strlen( val );
			if( len >= maxChunkSize ) {
				int		sent = 0;
				int		remaining = len;
				char	*cmd;
				char	buf[MAX_STRING_CHARS];

				while (remaining > 0 ) {
					if ( sent == 0 ) {
						cmd = "bcs0";
					}
					else if( remaining < maxChunkSize ) {
						cmd = "bcs2";
					}
					else {
						cmd = "bcs1";
					}
					Q_strncpyz( buf, &val[sent], maxChunkSize );

					SV_SendServerCommand( client, "%s %i \"%s\"\n", cmd, index, buf );

					sent += (maxChunkSize - 1);
					remaining -= (maxChunkSize - 1);
				}
			} else {
				// standard cs, just send it
				SV_SendServerCommand( client, "cs %i \"%s\"\n", index, val );
			}
		}
	}
}



/*
===============
SV_GetConfigstring

===============
*/
void SV_GetConfigstring( int index, char *buffer, int bufferSize ) {
	if ( bufferSize < 1 ) {
		Com_Error( ERR_DROP, "SV_GetConfigstring: bufferSize == %i", bufferSize );
	}
	if ( index < 0 || index >= MAX_CONFIGSTRINGS ) {
		Com_Error (ERR_DROP, "SV_GetConfigstring: bad index %i\n", index);
	}
	if ( !sv.configstrings[index] ) {
		buffer[0] = 0;
		return;
	}

	Q_strncpyz( buffer, sv.configstrings[index], bufferSize );
}


/*
===============
SV_SetUserinfo

===============
*/
void SV_SetUserinfo( int index, const char *val ) {
	if ( index < 0 || index >= sv_maxclients->integer ) {
		Com_Error (ERR_DROP, "SV_SetUserinfo: bad index %i\n", index);
	}

	if ( !val ) {
		val = "";
	}

	Q_strncpyz( svs.clients[index].userinfo, val, sizeof( svs.clients[ index ].userinfo ) );
	Q_strncpyz( svs.clients[index].name, Info_ValueForKey( val, "name" ), sizeof(svs.clients[index].name) );
}



/*
===============
SV_GetUserinfo

===============
*/
void SV_GetUserinfo( int index, char *buffer, int bufferSize ) {
	if ( bufferSize < 1 ) {
		Com_Error( ERR_DROP, "SV_GetUserinfo: bufferSize == %i", bufferSize );
	}
	if ( index < 0 || index >= sv_maxclients->integer ) {
		Com_Error (ERR_DROP, "SV_GetUserinfo: bad index %i\n", index);
	}
	Q_strncpyz( buffer, svs.clients[ index ].userinfo, bufferSize );
}


/*
================
SV_CreateBaseline

Entity baselines are used to compress non-delta messages
to the clients -- only the fields that differ from the
baseline will be transmitted
================
*/
void SV_CreateBaseline( void ) {
	sharedEntity_t *svent;
	int				entnum;	

	for ( entnum = 1; entnum < sv.num_entities ; entnum++ ) {
		svent = SV_GentityNum(entnum);
		if (!svent->r.linked) {
			continue;
		}
		svent->s.number = entnum;

		//
		// take current state as baseline
		//
		sv.svEntities[entnum].baseline = svent->s;
	}
}


/*
===============
SV_BoundMaxClients

===============
*/
void SV_BoundMaxClients( int minimum ) {
	// get the current maxclients value
	Cvar_Get( "sv_maxclients", "8", 0 );

	sv_maxclients->modified = qfalse;

	if ( sv_maxclients->integer < minimum ) {
		Cvar_Set( "sv_maxclients", va("%i", minimum) );
	} else if ( sv_maxclients->integer > MAX_CLIENTS ) {
		Cvar_Set( "sv_maxclients", va("%i", MAX_CLIENTS) );
	}
}


/*
===============
SV_Startup

Called when a host starts a map when it wasn't running
one before.  Successive map or map_restart commands will
NOT cause this to be called, unless the game is exited to
the menu system first.
===============
*/
void SV_Startup( void ) {
	if ( svs.initialized ) {
		Com_Error( ERR_FATAL, "SV_Startup: svs.initialized" );
	}
	SV_BoundMaxClients( 1 );

	svs.clients = Z_Malloc (sizeof(client_t) * sv_maxclients->integer );
	if ( com_dedicated->integer ) {
		svs.numSnapshotEntities = sv_maxclients->integer * PACKET_BACKUP * 64;
	} else {
		// we don't need nearly as many when playing locally
		svs.numSnapshotEntities = sv_maxclients->integer * 4 * 64;
	}
	svs.initialized = qtrue;

	Cvar_Set( "sv_running", "1" );
}


/*
==================
SV_ChangeMaxClients
==================
*/
void SV_ChangeMaxClients( void ) {
	int		oldMaxClients;
	int		i;
	client_t	*oldClients;
	int		count;

	// get the highest client number in use
	count = 0;
	for ( i = 0 ; i < sv_maxclients->integer ; i++ ) {
		if ( svs.clients[i].state >= CS_CONNECTED ) {
			if (i > count)
				count = i;
		}
	}
	count++;

	oldMaxClients = sv_maxclients->integer;
	// never go below the highest client number in use
	SV_BoundMaxClients( count );
	// if still the same
	if ( sv_maxclients->integer == oldMaxClients ) {
		return;
	}

	oldClients = Hunk_AllocateTempMemory( count * sizeof(client_t) );
	// copy the clients to hunk memory
	for ( i = 0 ; i < count ; i++ ) {
		if ( svs.clients[i].state >= CS_CONNECTED ) {
			oldClients[i] = svs.clients[i];
		}
		else {
			Com_Memset(&oldClients[i], 0, sizeof(client_t));
		}
	}

	// free old clients arrays
	Z_Free( svs.clients );

	// allocate new clients
	svs.clients = Z_Malloc ( sv_maxclients->integer * sizeof(client_t) );
	Com_Memset( svs.clients, 0, sv_maxclients->integer * sizeof(client_t) );

	// copy the clients over
	for ( i = 0 ; i < count ; i++ ) {
		if ( oldClients[i].state >= CS_CONNECTED ) {
			svs.clients[i] = oldClients[i];
		}
	}

	// free the old clients on the hunk
	Hunk_FreeTempMemory( oldClients );
	
	// allocate new snapshot entities
	if ( com_dedicated->integer ) {
		svs.numSnapshotEntities = sv_maxclients->integer * PACKET_BACKUP * 64;
	} else {
		// we don't need nearly as many when playing locally
		svs.numSnapshotEntities = sv_maxclients->integer * 4 * 64;
	}
}

/*
================
SV_ClearServer
================
*/
void SV_ClearServer(void) {
	int i;

	for ( i = 0 ; i < MAX_CONFIGSTRINGS ; i++ ) {
		if ( sv.configstrings[i] ) {
			Z_Free( sv.configstrings[i] );
		}
	}
	Com_Memset (&sv, 0, sizeof(sv));
}

/*
================
SV_TouchCGame

  touch the cgame.vm so that a pure client can load it if it's in a seperate pk3
================
*/
void SV_TouchCGame(void) {
	fileHandle_t	f;
	char filename[MAX_QPATH];

	Com_sprintf( filename, sizeof(filename), "vm/%s.qvm", "cgame" );
	FS_FOpenFileRead( filename, &f, qfalse );
	if ( f ) {
		FS_FCloseFile( f );
	}
}

/*
================
SV_SpawnServer

Change the server to a new map, taking all connected
clients along with it.
This is NOT called for map_restart
================
*/
void SV_SpawnServer( char *server, qboolean killBots ) {
	int			i;