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Xash3DArchive/engine/client/cl_parse.c

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2007-06-21 22:00:00 +02:00
/*
Copyright (C) 1997-2001 Id Software, Inc.
This program 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.
This program 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 this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
// cl_parse.c -- parse a message received from the server
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#include "common.h"
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#include "client.h"
/*
===============
CL_CheckOrDownloadFile
Returns true if the file exists, otherwise it attempts
to start a download from the server.
===============
*/
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bool CL_CheckOrDownloadFile( const char *filename )
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{
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string name;
file_t *f;
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if( FS_FileExists( filename ))
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{
// it exists, no need to download
return true;
}
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com.strncpy( cls.downloadname, filename, MAX_STRING );
com.strncpy( cls.downloadtempname, filename, MAX_STRING );
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// download to a temp name, and only rename to the real name when done,
// so if interrupted a runt file won't be left
FS_StripExtension( cls.downloadtempname );
FS_DefaultExtension( cls.downloadtempname, ".tmp" );
com.strncpy( name, cls.downloadtempname, MAX_STRING );
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f = FS_Open( name, "a+b" );
if( f )
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{
// it exists
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size_t len = FS_Tell( f );
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cls.download = f;
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// give the server an offset to start the download
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MsgDev( D_INFO, "Resume download %s at %i\n", cls.downloadname, len );
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MSG_WriteByte( &cls.netchan.message, clc_stringcmd );
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MSG_Print( &cls.netchan.message, va("download %s %i", cls.downloadname, len ));
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}
else
{
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MsgDev( D_INFO, "Start download %s\n", cls.downloadname );
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MSG_WriteByte( &cls.netchan.message, clc_stringcmd );
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MSG_Print( &cls.netchan.message, va("download %s", cls.downloadname ));
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}
cls.downloadnumber++;
return false;
}
/*
=====================
CL_ParseDownload
A download message has been received from the server
=====================
*/
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void CL_ParseDownload( sizebuf_t *msg )
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{
int size, percent;
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string name;
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int r;
// read the data
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size = MSG_ReadShort( msg );
percent = MSG_ReadByte( msg );
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if( size == -1 )
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{
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Msg( "Server does not have this file.\n" );
if( cls.download )
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{
// if here, we tried to resume a file but the server said no
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FS_Close( cls.download );
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cls.download = NULL;
}
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CL_RequestNextDownload();
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return;
}
// open the file if not opened yet
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if( !cls.download )
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{
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com.strncpy( name, cls.downloadtempname, MAX_STRING );
cls.download = FS_Open ( name, "wb" );
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if( !cls.download )
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{
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msg->readcount += size;
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Msg( "Failed to open %s\n", cls.downloadtempname );
CL_RequestNextDownload();
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return;
}
}
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FS_Write( cls.download, msg->data + msg->readcount, size );
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msg->readcount += size;
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if( percent != 100 )
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{
// request next block
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Cvar_SetValue("scr_download", percent );
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MSG_WriteByte( &cls.netchan.message, clc_stringcmd );
MSG_Print( &cls.netchan.message, "nextdl" );
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}
else
{
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string oldn, newn;
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FS_Close( cls.download );
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// rename the temp file to it's final name
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com.strncpy( oldn, cls.downloadtempname, MAX_STRING );
com.strncpy( newn, cls.downloadname, MAX_STRING );
r = rename( oldn, newn );
if( r ) MsgDev( D_ERROR, "failed to rename.\n" );
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cls.download = NULL;
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Cvar_SetValue( "scr_download", 0.0f );
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// get another file if needed
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CL_RequestNextDownload();
}
}
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void CL_RunBackgroundTrack( void )
{
string intro, main, track;
// run background track
com.strncpy( track, cl.configstrings[CS_BACKGROUND_TRACK], MAX_STRING );
com.snprintf( intro, MAX_STRING, "%s_intro", cl.configstrings[CS_BACKGROUND_TRACK] );
com.snprintf( main, MAX_STRING, "%s_main", cl.configstrings[CS_BACKGROUND_TRACK] );
if( FS_FileExists( va( "media/%s.ogg", intro )) && FS_FileExists( va( "media/%s.ogg", main )))
{
// combined track with introduction and main loop theme
S_StartBackgroundTrack( intro, main );
}
else if( FS_FileExists( va( "media/%s.ogg", track )))
{
// single looped theme
S_StartBackgroundTrack( track, track );
}
else if( !com.strcmp( track, "" ))
{
// blank name stopped last track
S_StopBackgroundTrack();
}
}
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/*
==================
CL_ParseSoundPacket
==================
*/
void CL_ParseSoundPacket( sizebuf_t *msg )
{
vec3_t pos;
int channel, sound_num;
float volume, attenuation;
int flags, pitch, entnum;
flags = MSG_ReadByte( msg );
sound_num = MSG_ReadWord( msg );
channel = MSG_ReadByte( msg );
if( flags & SND_VOL )
volume = MSG_ReadByte( msg ) / 255.0f;
else volume = 1.0f;
if( flags & SND_ATTN )
attenuation = MSG_ReadByte( msg ) / 255.0f;
else attenuation = ATTN_NORM;
if( flags & SND_PITCH )
pitch = MSG_ReadByte( msg );
else pitch = PITCH_NORM;
// entity reletive
if( flags & SND_ENT )
entnum = MSG_ReadBits( msg, NET_WORD );
if( flags & SND_POS )
{
// positioned in space
MSG_ReadPos( msg, pos );
}
else VectorClear( pos );
S_StartSound( pos, entnum, channel, cl.sound_precache[sound_num], volume, attenuation, pitch );
}
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/*
=====================================================================
SERVER CONNECTING MESSAGES
=====================================================================
*/
/*
==================
CL_ParseServerData
==================
*/
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void CL_ParseServerData( sizebuf_t *msg )
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{
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char *str;
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int i;
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MsgDev(D_INFO, "Serverdata packet received.\n");
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// wipe the client_t struct
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CL_ClearState();
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cls.state = ca_connected;
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// parse protocol version number
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i = MSG_ReadLong( msg );
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cls.serverProtocol = i;
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if( i != PROTOCOL_VERSION )
Host_Error("Server use invalid protocol (%i should be %i)\n", i, PROTOCOL_VERSION );
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cl.servercount = MSG_ReadLong( msg );
cl.playernum = MSG_ReadShort( msg );
str = MSG_ReadString( msg );
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// get splash name
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Cvar_Set( "cl_levelshot_name", va( "media/background/%s.png", str ));
Cvar_SetValue( "scr_loading", 0.0f ); // reset progress bar
if(!FS_FileExists( Cvar_VariableString( "cl_levelshot_name" )))
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{
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Cvar_Set( "cl_levelshot_name", "" );
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cl.need_levelshot = true; // make levelshot
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}
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// seperate the printfs so the server message can have a color
Msg("\35\36\36\36\36\36\36\36\36\36\36\36\36\36\36\36\36\36\36\36\36\36\36\36\36\36\36\36\36\36\36\36\36\36\36\36\37\n");
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// need to prep refresh at next oportunity
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cl.video_prepped = false;
cl.audio_prepped = false;
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}
/*
==================
CL_ParseBaseline
==================
*/
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void CL_ParseBaseline( sizebuf_t *msg )
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{
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int newnum;
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entity_state_t nullstate;
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edict_t *ent;
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Mem_Set( &nullstate, 0, sizeof( nullstate ));
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newnum = MSG_ReadBits( msg, NET_WORD );
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// increase edicts
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while( newnum >= clgame.numEntities ) CL_AllocEdict();
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ent = EDICT_NUM( newnum );
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Com_Assert( ent->pvClientData == NULL );
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MSG_ReadDeltaEntity( msg, &nullstate, &ent->pvClientData->baseline, newnum );
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}
/*
================
CL_ParseConfigString
================
*/
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void CL_ParseConfigString( sizebuf_t *msg )
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{
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int i;
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float value;
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i = MSG_ReadShort( msg );
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if( i < 0 || i >= MAX_CONFIGSTRINGS )
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Host_Error( "configstring > MAX_CONFIGSTRINGS\n" );
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com.strcpy( cl.configstrings[i], MSG_ReadString( msg ));
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// do something apropriate
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if( i == CS_SKYNAME && cl.video_prepped )
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{
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re->RegisterShader( cl.configstrings[CS_SKYNAME], SHADER_SKY );
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}
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else if( i == CS_MAXVELOCITY )
{
value = com.atof( cl.configstrings[CS_MAXVELOCITY] );
if( value > 0 ) clgame.maxVelocity = value;
else clgame.maxVelocity = com.atof( DEFAULT_MAXVELOCITY );
}
else if( i == CS_GRAVITY )
{
value = com.atof( cl.configstrings[CS_GRAVITY] );
if( value > 0 ) clgame.gravity = value;
else clgame.gravity = com.atof( DEFAULT_GRAVITY );
}
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else if( i == CS_BACKGROUND_TRACK && cl.audio_prepped )
{
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CL_RunBackgroundTrack();
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}
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else if( i >= CS_MODELS && i < CS_MODELS+MAX_MODELS && cl.video_prepped )
{
re->RegisterModel( cl.configstrings[i], i-CS_MODELS );
cl.models[i-CS_MODELS] = pe->RegisterModel( cl.configstrings[i] );
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}
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else if( i >= CS_SOUNDS && i < CS_SOUNDS+MAX_SOUNDS && cl.audio_prepped )
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{
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cl.sound_precache[i-CS_SOUNDS] = S_RegisterSound( cl.configstrings[i] );
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}
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else if( i >= CS_DECALS && i < CS_DECALS+MAX_DECALS && cl.video_prepped )
{
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cl.decal_shaders[i-CS_DECALS] = re->RegisterShader( cl.configstrings[i], SHADER_GENERIC );
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}
else if( i >= CS_USER_MESSAGES && i < CS_USER_MESSAGES+MAX_USER_MESSAGES )
{
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CL_LinkUserMessage( cl.configstrings[i], i - CS_USER_MESSAGES );
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}
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else if( i >= CS_CLASSNAMES && i < CS_CLASSNAMES+MAX_CLASSNAMES )
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{
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// edicts classnames for search by classname on client
cl.edict_classnames[i-CS_CLASSNAMES] = MAKE_STRING( cl.configstrings[i] );
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}
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else if( i >= CS_LIGHTSTYLES && i < CS_LIGHTSTYLES+MAX_LIGHTSTYLES )
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{
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CL_SetLightstyle( i - CS_LIGHTSTYLES );
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}
}
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/*
================
CL_ParseSetAngle
set the view angle to this absolute value
================
*/
void CL_ParseSetAngle( sizebuf_t *msg )
{
cl.viewangles[0] = MSG_ReadAngle16( msg );
cl.viewangles[1] = MSG_ReadAngle16( msg );
cl.viewangles[2] = MSG_ReadAngle16( msg );
}
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/*
=====================================================================
ACTION MESSAGES
=====================================================================
*/
/*
=====================
CL_ParseServerMessage
=====================
*/
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void CL_ParseServerMessage( sizebuf_t *msg )
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{
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char *s;
int cmd;
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// parse the message
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while( 1 )
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{
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if( msg->readcount > msg->cursize )
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{
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Host_Error("CL_ParseServerMessage: Bad server message\n");
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break;
}
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cmd = MSG_ReadByte( msg );
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if( cmd == -1 ) break;
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// other commands
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switch( cmd )
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{
case svc_nop:
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MsgDev( D_ERROR, "CL_ParseServerMessage: user message out of bounds\n" );
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break;
case svc_disconnect:
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CL_Drop ();
Host_AbortCurrentFrame();
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break;
case svc_reconnect:
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Msg( "Server disconnected, reconnecting\n" );
if( cls.download )
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{
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FS_Close( cls.download );
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cls.download = NULL;
}
cls.state = ca_connecting;
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cls.connect_time = MAX_HEARTBEAT; // CL_CheckForResend() will fire immediately
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break;
case svc_stufftext:
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s = MSG_ReadString( msg );
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Cbuf_AddText( s );
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break;
case svc_serverdata:
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Cbuf_Execute(); // make sure any stuffed commands are done
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CL_ParseServerData( msg );
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break;
case svc_configstring:
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CL_ParseConfigString( msg );
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break;
case svc_spawnbaseline:
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CL_ParseBaseline( msg );
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break;
case svc_download:
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CL_ParseDownload( msg );
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break;
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case svc_sound:
CL_ParseSoundPacket( msg );
break;
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case svc_setangle:
CL_ParseSetAngle( msg );
break;
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case svc_print:
Con_Print( va( "^6%s\n", MSG_ReadString( msg )));
break;
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case svc_frame:
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CL_ParseFrame( msg );
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break;
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case svc_playerinfo:
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case svc_packetentities:
case svc_deltapacketentities:
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Host_Error( "CL_ParseServerMessage: out of place frame data\n" );
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break;
case svc_bad:
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Host_Error( "CL_ParseServerMessage: svc_bad\n" );
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break;
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default:
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CL_ParseUserMessage( msg, cmd );
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break;
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}
}
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}