cl_parse.c

著名游戏quake2原代码最新版本(vc6.0可以编译的)

/*
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

#include "client.h"

char *svc_strings[256] =
{
	"svc_bad",

	"svc_muzzleflash",
	"svc_muzzlflash2",
	"svc_temp_entity",
	"svc_layout",
	"svc_inventory",

	"svc_nop",
	"svc_disconnect",
	"svc_reconnect",
	"svc_sound",
	"svc_print",
	"svc_stufftext",
	"svc_serverdata",
	"svc_configstring",
	"svc_spawnbaseline",	
	"svc_centerprint",
	"svc_download",
	"svc_playerinfo",
	"svc_packetentities",
	"svc_deltapacketentities",
	"svc_frame"
};

//=============================================================================

void CL_DownloadFileName(char *dest, int destlen, char *fn)
{
	if (strncmp(fn, "players", 7) == 0)
		Com_sprintf (dest, destlen, "%s/%s", BASEDIRNAME, fn);
	else
		Com_sprintf (dest, destlen, "%s/%s", FS_Gamedir(), fn);
}

/*
===============
CL_CheckOrDownloadFile

Returns true if the file exists, otherwise it attempts
to start a download from the server.
===============
*/
qboolean	CL_CheckOrDownloadFile (char *filename)
{
	FILE *fp;
	char	name[MAX_OSPATH];

	if (strstr (filename, ".."))
	{
		Com_Printf ("Refusing to download a path with ..\n");
		return true;
	}

	if (FS_LoadFile (filename, NULL) != -1)
	{	// it exists, no need to download
		return true;
	}

	strcpy (cls.downloadname, filename);

	// download to a temp name, and only rename
	// to the real name when done, so if interrupted
	// a runt file wont be left
	COM_StripExtension (cls.downloadname, cls.downloadtempname);
	strcat (cls.downloadtempname, ".tmp");

//ZOID
	// check to see if we already have a tmp for this file, if so, try to resume
	// open the file if not opened yet
	CL_DownloadFileName(name, sizeof(name), cls.downloadtempname);

//	FS_CreatePath (name);

	fp = fopen (name, "r+b");
	if (fp) { // it exists
		int len;
		fseek(fp, 0, SEEK_END);
		len = ftell(fp);

		cls.download = fp;

		// give the server an offset to start the download
		Com_Printf ("Resuming %s\n", cls.downloadname);
		MSG_WriteByte (&cls.netchan.message, clc_stringcmd);
		MSG_WriteString (&cls.netchan.message,
			va("download %s %i", cls.downloadname, len));
	} else {
		Com_Printf ("Downloading %s\n", cls.downloadname);
		MSG_WriteByte (&cls.netchan.message, clc_stringcmd);
		MSG_WriteString (&cls.netchan.message,
			va("download %s", cls.downloadname));
	}

	cls.downloadnumber++;

	return false;
}

/*
===============
CL_Download_f

Request a download from the server
===============
*/
void	CL_Download_f (void)
{
	char filename[MAX_OSPATH];

	if (Cmd_Argc() != 2) {
		Com_Printf("Usage: download <filename>\n");
		return;
	}

	Com_sprintf(filename, sizeof(filename), "%s", Cmd_Argv(1));

	if (strstr (filename, ".."))
	{
		Com_Printf ("Refusing to download a path with ..\n");
		return;
	}

	if (FS_LoadFile (filename, NULL) != -1)
	{	// it exists, no need to download
		Com_Printf("File already exists.\n");
		return;
	}

	strcpy (cls.downloadname, filename);
	Com_Printf ("Downloading %s\n", cls.downloadname);

	// download to a temp name, and only rename
	// to the real name when done, so if interrupted
	// a runt file wont be left
	COM_StripExtension (cls.downloadname, cls.downloadtempname);
	strcat (cls.downloadtempname, ".tmp");

	MSG_WriteByte (&cls.netchan.message, clc_stringcmd);
	MSG_WriteString (&cls.netchan.message,
		va("download %s", cls.downloadname));

	cls.downloadnumber++;
}

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

	S_BeginRegistration ();
	CL_RegisterTEntSounds ();
	for (i=1 ; i<MAX_SOUNDS ; i++)
	{
		if (!cl.configstrings[CS_SOUNDS+i][0])
			break;
		cl.sound_precache[i] = S_RegisterSound (cl.configstrings[CS_SOUNDS+i]);
		Sys_SendKeyEvents ();	// pump message loop
	}
	S_EndRegistration ();
}


/*
=====================
CL_ParseDownload

A download message has been received from the server
=====================
*/
void CL_ParseDownload (void)
{
	int		size, percent;
	char	name[MAX_OSPATH];
	int		r;

	// read the data
	size = MSG_ReadShort (&net_message);
	percent = MSG_ReadByte (&net_message);
	if (size == -1)
	{
		Com_Printf ("Server does not have this file.\n");
		if (cls.download)
		{
			// if here, we tried to resume a file but the server said no
			fclose (cls.download);
			cls.download = NULL;
		}
		CL_RequestNextDownload ();
		return;
	}

	// open the file if not opened yet
	if (!cls.download)
	{
		CL_DownloadFileName(name, sizeof(name), cls.downloadtempname);

		FS_CreatePath (name);

		cls.download = fopen (name, "wb");
		if (!cls.download)
		{
			net_message.readcount += size;
			Com_Printf ("Failed to open %s\n", cls.downloadtempname);
			CL_RequestNextDownload ();
			return;
		}
	}

	fwrite (net_message.data + net_message.readcount, 1, size, cls.download);
	net_message.readcount += size;

	if (percent != 100)
	{
		// request next block
// change display routines by zoid
#if 0
		Com_Printf (".");
		if (10*(percent/10) != cls.downloadpercent)
		{
			cls.downloadpercent = 10*(percent/10);
			Com_Printf ("%i%%", cls.downloadpercent);
		}
#endif
		cls.downloadpercent = percent;

		MSG_WriteByte (&cls.netchan.message, clc_stringcmd);
		SZ_Print (&cls.netchan.message, "nextdl");
	}
	else
	{
		char	oldn[MAX_OSPATH];
		char	newn[MAX_OSPATH];

//		Com_Printf ("100%%\n");

		fclose (cls.download);

		// rename the temp file to it's final name
		CL_DownloadFileName(oldn, sizeof(oldn), cls.downloadtempname);
		CL_DownloadFileName(newn, sizeof(newn), cls.downloadname);
		r = rename (oldn, newn);
		if (r)
			Com_Printf ("failed to rename.\n");

		cls.download = NULL;
		cls.downloadpercent = 0;

		// get another file if needed

		CL_RequestNextDownload ();
	}
}


/*
=====================================================================

  SERVER CONNECTING MESSAGES

=====================================================================
*/

/*
==================
CL_ParseServerData
==================
*/
void CL_ParseServerData (void)
{
	extern cvar_t	*fs_gamedirvar;
	char	*str;
	int		i;
	
	Com_DPrintf ("Serverdata packet received.\n");
//
// wipe the client_state_t struct
//
	CL_ClearState ();
	cls.state = ca_connected;

// parse protocol version number
	i = MSG_ReadLong (&net_message);
	cls.serverProtocol = i;

	// BIG HACK to let demos from release work with the 3.0x patch!!!
	if (Com_ServerState() && PROTOCOL_VERSION == 34)
	{
	}
	else if (i != PROTOCOL_VERSION)
		Com_Error (ERR_DROP,"Server returned version %i, not %i", i, PROTOCOL_VERSION);

	cl.servercount = MSG_ReadLong (&net_message);
	cl.attractloop = MSG_ReadByte (&net_message);

	// game directory
	str = MSG_ReadString (&net_message);
	strncpy (cl.gamedir, str, sizeof(cl.gamedir)-1);

	// set gamedir
	if ((*str && (!fs_gamedirvar->string || !*fs_gamedirvar->string || strcmp(fs_gamedirvar->string, str))) || (!*str && (fs_gamedirvar->string || *fs_gamedirvar->string)))
		Cvar_Set("game", str);

	// parse player entity number
	cl.playernum = MSG_ReadShort (&net_message);

	// get the full level name
	str = MSG_ReadString (&net_message);

	if (cl.playernum == -1)
	{	// playing a cinematic or showing a pic, not a level
		SCR_PlayCinematic (str);
	}
	else
	{
		// seperate the printfs so the server message can have a color
		Com_Printf("\n\n\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\n");
		Com_Printf ("%c%s\n", 2, str);

		// need to prep refresh at next oportunity
		cl.refresh_prepped = false;
	}
}

/*
==================
CL_ParseBaseline
==================
*/
void CL_ParseBaseline (void)
{
	entity_state_t	*es;
	int				bits;
	int				newnum;
	entity_state_t	nullstate;

	memset (&nullstate, 0, sizeof(nullstate));

	newnum = CL_ParseEntityBits (&bits);
	es = &cl_entities[newnum].baseline;
	CL_ParseDelta (&nullstate, es, newnum, bits);
}


/*
================
CL_LoadClientinfo

================
*/
void CL_LoadClientinfo (clientinfo_t *ci, char *s)
{
	int i;
	char		*t;
	char		model_name[MAX_QPATH];
	char		skin_name[MAX_QPATH];
	char		model_filename[MAX_QPATH];
	char		skin_filename[MAX_QPATH];
	char		weapon_filename[MAX_QPATH];

	strncpy(ci->cinfo, s, sizeof(ci->cinfo));
	ci->cinfo[sizeof(ci->cinfo)-1] = 0;

	// isolate the player's name
	strncpy(ci->name, s, sizeof(ci->name));
	ci->name[sizeof(ci->name)-1] = 0;
	t = strstr (s, "\\");
	if (t)
	{
		ci->name[t-s] = 0;
		s = t+1;
	}

	if (cl_noskins->value || *s == 0)
	{
		Com_sprintf (model_filename, sizeof(model_filename), "players/male/tris.md2");
		Com_sprintf (weapon_filename, sizeof(weapon_filename), "players/male/weapon.md2");