aboutsummaryrefslogtreecommitdiffstats
path: root/code/qcommon/qcommon.h
blob: 775923c692fea7ea9dd9a9eab78b3ef33a8cd274 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
/*
===========================================================================
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 Quake III Arena source code; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
===========================================================================
*/
// qcommon.h -- definitions common between client and server, but not game.or ref modules
#ifndef _QCOMMON_H_
#define _QCOMMON_H_

#include "../qcommon/cm_public.h"

//Ignore __attribute__ on non-gcc platforms
#ifndef __GNUC__
#ifndef __attribute__
#define __attribute__(x)
#endif
#endif

//#define	PRE_RELEASE_DEMO

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

//
// msg.c
//
typedef struct {
	qboolean	allowoverflow;	// if false, do a Com_Error
	qboolean	overflowed;		// set to true if the buffer size failed (with allowoverflow set)
	qboolean	oob;			// set to true if the buffer size failed (with allowoverflow set)
	byte	*data;
	int		maxsize;
	int		cursize;
	int		readcount;
	int		bit;				// for bitwise reads and writes
} msg_t;

void MSG_Init (msg_t *buf, byte *data, int length);
void MSG_InitOOB( msg_t *buf, byte *data, int length );
void MSG_Clear (msg_t *buf);
void MSG_WriteData (msg_t *buf, const void *data, int length);
void MSG_Bitstream( msg_t *buf );

// TTimo
// copy a msg_t in case we need to store it as is for a bit
// (as I needed this to keep an msg_t from a static var for later use)
// sets data buffer as MSG_Init does prior to do the copy
void MSG_Copy(msg_t *buf, byte *data, int length, msg_t *src);

struct usercmd_s;
struct entityState_s;
struct playerState_s;

void MSG_WriteBits( msg_t *msg, int value, int bits );

void MSG_WriteChar (msg_t *sb, int c);
void MSG_WriteByte (msg_t *sb, int c);
void MSG_WriteShort (msg_t *sb, int c);
void MSG_WriteLong (msg_t *sb, int c);
void MSG_WriteFloat (msg_t *sb, float f);
void MSG_WriteString (msg_t *sb, const char *s);
void MSG_WriteBigString (msg_t *sb, const char *s);
void MSG_WriteAngle16 (msg_t *sb, float f);

void	MSG_BeginReading (msg_t *sb);
void	MSG_BeginReadingOOB(msg_t *sb);

int		MSG_ReadBits( msg_t *msg, int bits );

int		MSG_ReadChar (msg_t *sb);
int		MSG_ReadByte (msg_t *sb);
int		MSG_ReadShort (msg_t *sb);
int		MSG_ReadLong (msg_t *sb);
float	MSG_ReadFloat (msg_t *sb);
char	*MSG_ReadString (msg_t *sb);
char	*MSG_ReadBigString (msg_t *sb);
char	*MSG_ReadStringLine (msg_t *sb);
float	MSG_ReadAngle16 (msg_t *sb);
void	MSG_ReadData (msg_t *sb, void *buffer, int size);


void MSG_WriteDeltaUsercmd( msg_t *msg, struct usercmd_s *from, struct usercmd_s *to );
void MSG_ReadDeltaUsercmd( msg_t *msg, struct usercmd_s *from, struct usercmd_s *to );

void MSG_WriteDeltaUsercmdKey( msg_t *msg, int key, usercmd_t *from, usercmd_t *to );
void MSG_ReadDeltaUsercmdKey( msg_t *msg, int key, usercmd_t *from, usercmd_t *to );

void MSG_WriteDeltaEntity( msg_t *msg, struct entityState_s *from, struct entityState_s *to
						   , qboolean force );
void MSG_ReadDeltaEntity( msg_t *msg, entityState_t *from, entityState_t *to, 
						 int number );

void MSG_WriteDeltaPlayerstate( msg_t *msg, struct playerState_s *from, struct playerState_s *to );
void MSG_ReadDeltaPlayerstate( msg_t *msg, struct playerState_s *from, struct playerState_s *to );


void MSG_ReportChangeVectors_f( void );

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

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

NET

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

#define	PACKET_BACKUP	32	// number of old messages that must be kept on client and
							// server for delta comrpession and ping estimation
#define	PACKET_MASK		(PACKET_BACKUP-1)

#define	MAX_PACKET_USERCMDS		32		// max number of usercmd_t in a packet

#define	PORT_ANY			-1

#define	MAX_RELIABLE_COMMANDS	64			// max string commands buffered for restransmit

typedef enum {
	NA_BOT,
	NA_BAD,					// an address lookup failed
	NA_LOOPBACK,
	NA_BROADCAST,
	NA_IP,
	NA_IPX,
	NA_BROADCAST_IPX
} netadrtype_t;

typedef enum {
	NS_CLIENT,
	NS_SERVER
} netsrc_t;

typedef struct {
	netadrtype_t	type;

	byte	ip[4];
	byte	ipx[10];

	unsigned short	port;
} netadr_t;

void		NET_Init( void );
void		NET_Shutdown( void );
void		NET_Restart( void );
void		NET_Config( qboolean enableNetworking );

void		NET_SendPacket (netsrc_t sock, int length, const void *data, netadr_t to);
void		QDECL NET_OutOfBandPrint( netsrc_t net_socket, netadr_t adr, const char *format, ...);
void		QDECL NET_OutOfBandData( netsrc_t sock, netadr_t adr, byte *format, int len );

qboolean	NET_CompareAdr (netadr_t a, netadr_t b);
qboolean	NET_CompareBaseAdr (netadr_t a, netadr_t b);
qboolean	NET_IsLocalAddress (netadr_t adr);
const char	*NET_AdrToString (netadr_t a);
qboolean	NET_StringToAdr ( const char *s, netadr_t *a);
qboolean	NET_GetLoopPacket (netsrc_t sock, netadr_t *net_from, msg_t *net_message);
void		NET_Sleep(int msec);


#define	MAX_MSGLEN				16384		// max length of a message, which may
											// be fragmented into multiple packets

#define MAX_DOWNLOAD_WINDOW			8		// max of eight download frames
#define MAX_DOWNLOAD_BLKSIZE		2048	// 2048 byte block chunks
 

/*
Netchan handles packet fragmentation and out of order / duplicate suppression
*/

typedef struct {
	netsrc_t	sock;

	int			dropped;			// between last packet and previous

	netadr_t	remoteAddress;
	int			qport;				// qport value to write when transmitting

	// sequencing variables
	int			incomingSequence;
	int			outgoingSequence;

	// incoming fragment assembly buffer
	int			fragmentSequence;
	int			fragmentLength;	
	byte		fragmentBuffer[MAX_MSGLEN];

	// outgoing fragment buffer
	// we need to space out the sending of large fragmented messages
	qboolean	unsentFragments;
	int			unsentFragmentStart;
	int			unsentLength;
	byte		unsentBuffer[MAX_MSGLEN];
} netchan_t;

void Netchan_Init( int qport );
void Netchan_Setup( netsrc_t sock, netchan_t *chan, netadr_t adr, int qport );

void Netchan_Transmit( netchan_t *chan, int length, const byte *data );
void Netchan_TransmitNextFragment( netchan_t *chan );

qboolean Netchan_Process( netchan_t *chan, msg_t *msg );


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

PROTOCOL

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

#define	PROTOCOL_VERSION	68
// 1.31 - 67

// maintain a list of compatible protocols for demo playing
// NOTE: that stuff only works with two digits protocols
extern int demo_protocols[];

#define	UPDATE_SERVER_NAME	"update.quake3arena.com"
// override on command line, config files etc.
#ifndef MASTER_SERVER_NAME
#define MASTER_SERVER_NAME	"master.quake3arena.com"
#endif
#ifndef AUTHORIZE_SERVER_NAME
#define	AUTHORIZE_SERVER_NAME	"authorize.quake3arena.com"
#endif

#define	PORT_MASTER			27950
#define	PORT_UPDATE			27951
#ifndef PORT_AUTHORIZE
#define	PORT_AUTHORIZE		27952
#endif
#define	PORT_SERVER			27960
#define	NUM_SERVER_PORTS	4		// broadcast scan this many ports after
									// PORT_SERVER so a single machine can
									// run multiple servers


// the svc_strings[] array in cl_parse.c should mirror this
//
// server to client
//
enum svc_ops_e {
	svc_bad,
	svc_nop,
	svc_gamestate,
	svc_configstring,			// [short] [string] only in gamestate messages
	svc_baseline,				// only in gamestate messages
	svc_serverCommand,			// [string] to be executed by client game module
	svc_download,				// [short] size [size bytes]
	svc_snapshot,
	svc_EOF
};


//
// client to server
//
enum clc_ops_e {
	clc_bad,
	clc_nop, 		
	clc_move,				// [[usercmd_t]
	clc_moveNoDelta,		// [[usercmd_t]
	clc_clientCommand,		// [string] message
	clc_EOF
};

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

VIRTUAL MACHINE

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

typedef struct vm_s vm_t;

typedef enum {
	VMI_NATIVE,
	VMI_BYTECODE,
	VMI_COMPILED
} vmInterpret_t;

typedef enum {
	TRAP_MEMSET = 100,
	TRAP_MEMCPY,
	TRAP_STRNCPY,
	TRAP_SIN,
	TRAP_COS,
	TRAP_ATAN2,
	TRAP_SQRT,
	TRAP_MATRIXMULTIPLY,
	TRAP_ANGLEVECTORS,
	TRAP_PERPENDICULARVECTOR,
	TRAP_FLOOR,
	TRAP_CEIL,

	TRAP_TESTPRINTINT,
	TRAP_TESTPRINTFLOAT
} sharedTraps_t;

void	VM_Init( void );
vm_t	*VM_Create( const char *module, long (*systemCalls)(long *), 
				   vmInterpret_t interpret );
// module should be bare: "cgame", not "cgame.dll" or "vm/cgame.qvm"

void	VM_Free( vm_t *vm );
void	VM_Clear(void);
vm_t	*VM_Restart( vm_t *vm );

long		QDECL VM_Call( vm_t *vm, long callNum, ... );

void	VM_Debug( int level );

void	*VM_ArgPtr( long intValue );
void	*VM_ExplicitArgPtr( vm_t *vm, long intValue );

#define	VMA(x) VM_ArgPtr(args[x])
static __inline float _vmf(long x)
{
	union {
		long l;
		float f;
	} t;
	t.l = x;
	return t.f;
}
#define	VMF(x)	_vmf(args[x])


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

CMD

Command text buffering and command execution

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

/*

Any number of commands can be added in a frame, from several different sources.
Most commands come from either keybindings or console line input, but entire text
files can be execed.

*/

void Cbuf_Init (void);
// allocates an initial text buffer that will grow as needed

void Cbuf_AddText( const char *text );
// Adds command text at the end of the buffer, does NOT add a final \n

void Cbuf_ExecuteText( int exec_when, const char *text );
// this can be used in place of either Cbuf_AddText or Cbuf_InsertText

void Cbuf_Execute (void);
// Pulls off \n terminated lines of text from the command buffer and sends
// them through Cmd_ExecuteString.  Stops when the buffer is empty.
// Normally called once per frame, but may be explicitly invoked.
// Do not call inside a command function, or current args will be destroyed.

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

/*

Command execution takes a null terminated string, breaks it into tokens,
then searches for a command or variable that matches the first token.

*/

typedef void (*xcommand_t) (void);

void	Cmd_Init (void);

void	Cmd_AddCommand( const char *cmd_name, xcommand_t function );
// called by the init functions of other parts of the program to
// register commands and functions to call for them.
// The cmd_name is referenced later, so it should not be in temp memory
// if function is NULL, the command will be forwarded to the server
// as a clc_clientCommand instead of executed locally

void	Cmd_RemoveCommand( const char *cmd_name );

void	Cmd_CommandCompletion( void(*callback)(const char *s) );
// callback with each valid string

int		Cmd_Argc (void);
char	*Cmd_Argv (int arg);
void	Cmd_ArgvBuffer( int arg, char *buffer, int bufferLength );
char	*Cmd_Args (void);
char	*Cmd_ArgsFrom( int arg );
void	Cmd_ArgsBuffer( char *buffer, int bufferLength );
char	*Cmd_Cmd (void);
// The functions that execute commands get their parameters with these
// functions. Cmd_Argv () will return an empty string, not a NULL
// if arg > argc, so string operations are allways safe.

void	Cmd_TokenizeString( const char *text );
// Takes a null terminated string.  Does not need to be /n terminated.
// breaks the string up into arg tokens.

void	Cmd_ExecuteString( const char *text );
// Parses a single line of text into arguments and tries to execute it
// as if it was typed at the console


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

CVAR

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

/*

cvar_t variables are used to hold scalar or string variables that can be changed
or displayed at the console or prog code as well as accessed directly
in C code.

The user can access cvars from the console in three ways:
r_draworder			prints the current value
r_draworder 0		sets the current value to 0
set r_draworder 0	as above, but creates the cvar if not present

Cvars are restricted from having the same names as commands to keep this
interface from being ambiguous.

The are also occasionally used to communicated information between different
modules of the program.

*/

cvar_t *Cvar_Get( const char *var_name, const char *value, int flags );
// creates the variable if it doesn't exist, or returns the existing one
// if it exists, the value will not be changed, but flags will be ORed in
// that allows variables to be unarchived without needing bitflags
// if value is "", the value will not override a previously set value.

void	Cvar_Register( vmCvar_t *vmCvar, const char *varName, const char *defaultValue, int flags );
// basically a slightly modified Cvar_Get for the interpreted modules

void	Cvar_Update( vmCvar_t *vmCvar );
// updates an interpreted modules' version of a cvar

void 	Cvar_Set( const char *var_name, const char *value );
// will create the variable with no flags if it doesn't exist

void Cvar_SetLatched( const char *var_name, const char *value);
// don't set the cvar immediately

void	Cvar_SetValue( const char *var_name, float value );
// expands value to a string and calls Cvar_Set

float	Cvar_VariableValue( const char *var_name );
int		Cvar_VariableIntegerValue( const char *var_name );
// returns 0 if not defined or non numeric

char	*Cvar_VariableString( const char *var_name );
void	Cvar_VariableStringBuffer( const char *var_name, char *buffer, int bufsize );
// returns an empty string if not defined

void	Cvar_CommandCompletion( void(*callback)(const char *s) );
// callback with each valid string

void 	Cvar_Reset( const char *var_name );

void	Cvar_SetCheatState( void );
// reset all testing vars to a safe value

qboolean Cvar_Command( void );
// called by Cmd_ExecuteString when Cmd_Argv(0) doesn't match a known
// command.  Returns true if the command was a variable reference that
// was handled. (print or change)

void 	Cvar_WriteVariables( fileHandle_t f );
// writes lines containing "set variable value" for all variables
// with the archive flag set to true.

void	Cvar_Init( void );

char	*Cvar_InfoString( int bit );
char	*Cvar_InfoString_Big( int bit );
// returns an info string containing all the cvars that have the given bit set
// in their flags ( CVAR_USERINFO, CVAR_SERVERINFO, CVAR_SYSTEMINFO, etc )
void	Cvar_InfoStringBuffer( int bit, char *buff, int buffsize );

void	Cvar_Restart_f( void );

extern	int			cvar_modifiedFlags;
// whenever a cvar is modifed, its flags will be OR'd into this, so
// a single check can determine if any CVAR_USERINFO, CVAR_SERVERINFO,
// etc, variables have been modified since the last check.  The bit
// can then be cleared to allow another change detection.

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

FILESYSTEM

No stdio calls should be used by any part of the game, because
we need to deal with all sorts of directory and seperator char
issues.
==============================================================
*/

// referenced flags
// these are in loop specific order so don't change the order
#define FS_GENERAL_REF	0x01
#define FS_UI_REF		0x02
#define FS_CGAME_REF	0x04
#define FS_QAGAME_REF	0x08
// number of id paks that will never be autodownloaded from baseq3
#define NUM_ID_PAKS		9

#define	MAX_FILE_HANDLES	64

#define BASEGAME "baseq3"

qboolean FS_Initialized( void );

void	FS_InitFilesystem ( void );
void	FS_Shutdown( qboolean closemfp );

qboolean	FS_ConditionalRestart( int checksumFeed );
void	FS_Restart( int checksumFeed );
// shutdown and restart the filesystem so changes to fs_gamedir can take effect

char	**FS_ListFiles( const char *directory, const char *extension, int *numfiles );
// directory should not have either a leading or trailing /
// if extension is "/", only subdirectories will be returned
// the returned files will not include any directories or /

void	FS_FreeFileList( char **list );

qboolean FS_FileExists( const char *file );

char   *FS_BuildOSPath( const char *base, const char *game, const char *qpath );

int		FS_LoadStack( void );

int		FS_GetFileList(  const char *path, const char *extension, char *listbuf, int bufsize );
int		FS_GetModList(  char *listbuf, int bufsize );

fileHandle_t	FS_FOpenFileWrite( const char *qpath );
// will properly create any needed paths and deal with seperater character issues

int		FS_filelength( fileHandle_t f );
fileHandle_t FS_SV_FOpenFileWrite( const char *filename );
int		FS_SV_FOpenFileRead( const char *filename, fileHandle_t *fp );
void	FS_SV_Rename( const char *from, const char *to );
int		FS_FOpenFileRead( const char *qpath, fileHandle_t *file, qboolean uniqueFILE );
// if uniqueFILE is true, then a new FILE will be fopened even if the file
// is found in an already open pak file.  If uniqueFILE is false, you must call
// FS_FCloseFile instead of fclose, otherwise the pak FILE would be improperly closed
// It is generally safe to always set uniqueFILE to true, because the majority of
// file IO goes through FS_ReadFile, which Does The Right Thing already.

int		FS_FileIsInPAK(const char *filename, int *pChecksum );
// returns 1 if a file is in the PAK file, otherwise -1

int		FS_Write( const void *buffer, int len, fileHandle_t f );

int		FS_Read2( void *buffer, int len, fileHandle_t f );
int		FS_Read( void *buffer, int len, fileHandle_t f );
// properly handles partial reads and reads from other dlls

void	FS_FCloseFile( fileHandle_t f );
// note: you can't just fclose from another DLL, due to MS libc issues

int		FS_ReadFile( const char *qpath, void **buffer );
// returns the length of the file
// a null buffer will just return the file length without loading
// as a quick check for existance. -1 length == not present
// A 0 byte will always be appended at the end, so string ops are safe.
// the buffer should be considered read-only, because it may be cached
// for other uses.

void	FS_ForceFlush( fileHandle_t f );
// forces flush on files we're writing to.

void	FS_FreeFile( void *buffer );
// frees the memory returned by FS_ReadFile

void	FS_WriteFile( const char *qpath, const void *buffer, int size );
// writes a complete file, creating any subdirectories needed

int		FS_filelength( fileHandle_t f );
// doesn't work for files that are opened from a pack file

int		FS_FTell( fileHandle_t f );
// where are we?

void	FS_Flush( fileHandle_t f );

void 	QDECL FS_Printf( fileHandle_t f, const char *fmt, ... ) __attribute__ ((format (printf, 2, 3)));
// like fprintf

int		FS_FOpenFileByMode( const char *qpath, fileHandle_t *f, fsMode_t mode );
// opens a file for reading, writing, or appending depending on the value of mode

int		FS_Seek( fileHandle_t f, long offset, int origin );
// seek on a file (doesn't work for zip files!!!!!!!!)

qboolean FS_FilenameCompare( const char *s1, const char *s2 );

const char *FS_GamePureChecksum( void );
// Returns the checksum of the pk3 from which the server loaded the qagame.qvm

const char *FS_LoadedPakNames( void );
const char *FS_LoadedPakChecksums( void );
const char *FS_LoadedPakPureChecksums( void );
// Returns a space separated string containing the checksums of all loaded pk3 files.
// Servers with sv_pure set will get this string and pass it to clients.

const char *FS_ReferencedPakNames( void );
const char *FS_ReferencedPakChecksums( void );
const char *FS_ReferencedPakPureChecksums( void );
// Returns a space separated string containing the checksums of all loaded 
// AND referenced pk3 files. Servers with sv_pure set will get this string 
// back from clients for pure validation 

void FS_ClearPakReferences( int flags );
// clears referenced booleans on loaded pk3s

void FS_PureServerSetReferencedPaks( const char *pakSums, const char *pakNames );
void FS_PureServerSetLoadedPaks( const char *pakSums, const char *pakNames );
// If the string is empty, all data sources will be allowed.
// If not empty, only pk3 files that match one of the space
// separated checksums will be checked for files, with the
// sole exception of .cfg files.

qboolean FS_idPak( char *pak, char *base );
qboolean FS_ComparePaks( char *neededpaks, int len, qboolean dlstring );

void FS_Rename( const char *from, const char *to );

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

Edit fields and command line history/completion

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

#define	MAX_EDIT_LINE	256
typedef struct {
	int		cursor;
	int		scroll;
	int		widthInChars;
	char	buffer[MAX_EDIT_LINE];
} field_t;

void Field_Clear( field_t *edit );
void Field_CompleteCommand( field_t *edit );

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

MISC

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

// TTimo
// vsnprintf is ISO/IEC 9899:1999
// abstracting this to make it portable
#ifdef WIN32
#define Q_vsnprintf _vsnprintf
#else
// TODO: do we need Mac define?
#define Q_vsnprintf vsnprintf
#endif

// centralizing the declarations for cl_cdkey
// https://zerowing.idsoftware.com/bugzilla/show_bug.cgi?id=470
extern char cl_cdkey[34];

// returnbed by Sys_GetProcessorId
#define CPUID_GENERIC			0			// any unrecognized processor

#define CPUID_AXP				0x10

#define CPUID_INTEL_UNSUPPORTED	0x20			// Intel 386/486
#define CPUID_INTEL_PENTIUM		0x21			// Intel Pentium or PPro
#define CPUID_INTEL_MMX			0x22			// Intel Pentium/MMX or P2/MMX
#define CPUID_INTEL_KATMAI		0x23			// Intel Katmai

#define CPUID_AMD_3DNOW			0x30			// AMD K6 3DNOW!

// TTimo
// centralized and cleaned, that's the max string you can send to a Com_Printf / Com_DPrintf (above gets truncated)
#define	MAXPRINTMSG	4096

char		*CopyString( const char *in );
void		Info_Print( const char *s );

void		Com_BeginRedirect (char *buffer, int buffersize, void (*flush)(char *));
void		Com_EndRedirect( void );
void 		QDECL Com_Printf( const char *fmt, ... );
void 		QDECL Com_DPrintf( const char *fmt, ... );
void 		QDECL Com_Error( int code, const char *fmt, ... );
void 		Com_Quit_f( void );
int			Com_EventLoop( void );
int			Com_Milliseconds( void );	// will be journaled properly
unsigned	Com_BlockChecksum( const void *buffer, int length );
unsigned	Com_BlockChecksumKey (void *buffer, int length, int key);
int			Com_HashKey(char *string, int maxlen);
int			Com_Filter(char *filter, char *name, int casesensitive);
int			Com_FilterPath(char *filter, char *name, int casesensitive);
int			Com_RealTime(qtime_t *qtime);
qboolean	Com_SafeMode( void );

void		Com_StartupVariable( const char *match );
// checks for and removes command line "+set var arg" constructs
// if match is NULL, all set commands will be executed, otherwise
// only a set with the exact name.  Only used during startup.


extern	cvar_t	*com_developer;
extern	cvar_t	*com_dedicated;
extern	cvar_t	*com_speeds;
extern	cvar_t	*com_timescale;
extern	cvar_t	*com_sv_running;
extern	cvar_t	*com_cl_running;
extern	cvar_t	*com_viewlog;			// 0 = hidden, 1 = visible, 2 = minimized
extern	cvar_t	*com_version;
extern	cvar_t	*com_blood;
extern	cvar_t	*com_buildScript;		// for building release pak files
extern	cvar_t	*com_journal;
extern	cvar_t	*com_cameraMode;

// both client and server must agree to pause
extern	cvar_t	*cl_paused;
extern	cvar_t	*sv_paused;

// com_speeds times
extern	int		time_game;
extern	int		time_frontend;
extern	int		time_backend;		// renderer backend time

extern	int		com_frameTime;
extern	int		com_frameMsec;

extern	qboolean	com_errorEntered;

extern	fileHandle_t	com_journalFile;
extern	fileHandle_t	com_journalDataFile;

typedef enum {
	TAG_FREE,
	TAG_GENERAL,
	TAG_BOTLIB,
	TAG_RENDERER,
	TAG_SMALL,
	TAG_STATIC
} memtag_t;

/*

--- low memory ----
server vm
server clipmap
---mark---
renderer initialization (shaders, etc)
UI vm
cgame vm
renderer map
renderer models

---free---

temp file loading
--- high memory ---

*/

#if defined(_DEBUG) && !defined(BSPC)
	#define ZONE_DEBUG
#endif

#ifdef ZONE_DEBUG
#define Z_TagMalloc(size, tag)			Z_TagMallocDebug(size, tag, #size, __FILE__, __LINE__)
#define Z_Malloc(size)					Z_MallocDebug(size, #size, __FILE__, __LINE__)
#define S_Malloc(size)					S_MallocDebug(size, #size, __FILE__, __LINE__)
void *Z_TagMallocDebug( int size, int tag, char *label, char *file, int line );	// NOT 0 filled memory
void *Z_MallocDebug( int size, char *label, char *file, int line );			// returns 0 filled memory
void *S_MallocDebug( int size, char *label, char *file, int line );			// returns 0 filled memory
#else
void *Z_TagMalloc( int size, int tag );	// NOT 0 filled memory
void *Z_Malloc( int size );			// returns 0 filled memory
void *S_Malloc( int size );			// NOT 0 filled memory only for small allocations
#endif
void Z_Free( void *ptr );
void Z_FreeTags( int tag );
int Z_AvailableMemory( void );
void Z_LogHeap( void );

void Hunk_Clear( void );
void Hunk_ClearToMark( void );
void Hunk_SetMark( void );
qboolean Hunk_CheckMark( void );
void Hunk_ClearTempMemory( void );
void *Hunk_AllocateTempMemory( int size );
void Hunk_FreeTempMemory( void *buf );
int	Hunk_MemoryRemaining( void );
void Hunk_Log( void);
void Hunk_Trash( void );

void Com_TouchMemory( void );

// commandLine should not include the executable name (argv[0])
void Com_Init( char *commandLine );
void Com_Frame( void );
void Com_Shutdown( void );


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

CLIENT / SERVER SYSTEMS

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

//
// client interface
//
void CL_InitKeyCommands( void );
// the keyboard binding interface must be setup before execing
// config files, but the rest of client startup will happen later

void CL_Init( void );
void CL_Disconnect( qboolean showMainMenu );
void CL_Shutdown( void );
void CL_Frame( int msec );
qboolean CL_GameCommand( void );
void CL_KeyEvent (int key, qboolean down, unsigned time);

void CL_CharEvent( int key );
// char events are for field typing, not game control

void CL_MouseEvent( int dx, int dy, int time );

void CL_JoystickEvent( int axis, int value, int time );

void CL_PacketEvent( netadr_t from, msg_t *msg );

void CL_ConsolePrint( char *text );

void CL_MapLoading( void );
// do a screen update before starting to load a map
// when the server is going to load a new map, the entire hunk
// will be cleared, so the client must shutdown cgame, ui, and
// the renderer

void	CL_ForwardCommandToServer( const char *string );
// adds the current command line as a clc_clientCommand to the client message.
// things like godmode, noclip, etc, are commands directed to the server,
// so when they are typed in at the console, they will need to be forwarded.

void CL_CDDialog( void );
// bring up the "need a cd to play" dialog

void CL_ShutdownAll( void );
// shutdown all the client stuff

void CL_FlushMemory( void );
// dump all memory on an error

void CL_StartHunkUsers( void );
// start all the client stuff using the hunk

void Key_WriteBindings( fileHandle_t f );
// for writing the config files

void S_ClearSoundBuffer( void );
// call before filesystem access

void SCR_DebugGraph (float value, int color);	// FIXME: move logging to common?


//
// server interface
//
void SV_Init( void );
void SV_Shutdown( char *finalmsg );
void SV_Frame( int msec );
void SV_PacketEvent( netadr_t from, msg_t *msg );
qboolean SV_GameCommand( void );


//
// UI interface
//
qboolean UI_GameCommand( void );
qboolean UI_usesUniqueCDKey(void);

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

NON-PORTABLE SYSTEM SERVICES

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

typedef enum {
	AXIS_SIDE,
	AXIS_FORWARD,
	AXIS_UP,
	AXIS_ROLL,
	AXIS_YAW,
	AXIS_PITCH,
	MAX_JOYSTICK_AXIS
} joystickAxis_t;

typedef enum {
  // bk001129 - make sure SE_NONE is zero
	SE_NONE = 0,	// evTime is still valid
	SE_KEY,		// evValue is a key code, evValue2 is the down flag
	SE_CHAR,	// evValue is an ascii char
	SE_MOUSE,	// evValue and evValue2 are reletive signed x / y moves
	SE_JOYSTICK_AXIS,	// evValue is an axis number and evValue2 is the current state (-127 to 127)
	SE_CONSOLE,	// evPtr is a char*
	SE_PACKET	// evPtr is a netadr_t followed by data bytes to evPtrLength
} sysEventType_t;

typedef struct {
	int				evTime;
	sysEventType_t	evType;
	int				evValue, evValue2;
	int				evPtrLength;	// bytes of data pointed to by evPtr, for journaling
	void			*evPtr;			// this must be manually freed if not NULL
} sysEvent_t;

sysEvent_t	Sys_GetEvent( void );

void	Sys_Init (void);

// general development dll loading for virtual machine testing
// fqpath param added 7/20/02 by T.Ray - Sys_LoadDll is only called in vm.c at this time
void	* QDECL Sys_LoadDll( const char *name, char *fqpath , long (QDECL **entryPoint)(long, ...),
				  long (QDECL *systemcalls)(long, ...) );
void	Sys_UnloadDll( void *dllHandle );

void	Sys_UnloadGame( void );
void	*Sys_GetGameAPI( void *parms );

void	Sys_UnloadCGame( void );
void	*Sys_GetCGameAPI( void );

void	Sys_UnloadUI( void );
void	*Sys_GetUIAPI( void );

//bot libraries
void	Sys_UnloadBotLib( void );
void	*Sys_GetBotLibAPI( void *parms );

char	*Sys_GetCurrentUser( void );

void	QDECL Sys_Error( const char *error, ...);
void	Sys_Quit (void);
char	*Sys_GetClipboardData( void );	// note that this isn't journaled...

void	Sys_Print( const char *msg );

// Sys_Milliseconds should only be used for profiling purposes,
// any game related timing information should come from event timestamps
int		Sys_Milliseconds (void);

void	Sys_SnapVector( float *v );

// the system console is shown when a dedicated server is running
void	Sys_DisplaySystemConsole( qboolean show );

int		Sys_GetProcessorId( void );

void	Sys_BeginStreamedFile( fileHandle_t f, int readahead );
void	Sys_EndStreamedFile( fileHandle_t f );
int		Sys_StreamedRead( void *buffer, int size, int count, fileHandle_t f );
void	Sys_StreamSeek( fileHandle_t f, int offset, int origin );

void	Sys_ShowConsole( int level, qboolean quitOnClose );
void	Sys_SetErrorText( const char *text );

void	Sys_SendPacket( int length, const void *data, netadr_t to );

qboolean	Sys_StringToAdr( const char *s, netadr_t *a );
//Does NOT parse port numbers, only base addresses.

qboolean	Sys_IsLANAddress (netadr_t adr);
void		Sys_ShowIP(void);

qboolean	Sys_CheckCD( void );

void	Sys_Mkdir( const char *path );
char	*Sys_Cwd( void );
void	Sys_SetDefaultCDPath(const char *path);
char	*Sys_DefaultCDPath(void);
void	Sys_SetDefaultInstallPath(const char *path);
char	*Sys_DefaultInstallPath(void);
void  Sys_SetDefaultHomePath(const char *path);
char	*Sys_DefaultHomePath(void);

char **Sys_ListFiles( const char *directory, const char *extension, char *filter, int *numfiles, qboolean wantsubs );
void	Sys_FreeFileList( char **list );

void	Sys_BeginProfiling( void );
void	Sys_EndProfiling( void );

qboolean Sys_LowPhysicalMemory( void );
unsigned int Sys_ProcessorCount( void );

int Sys_MonkeyShouldBeSpanked( void );

/* This is based on the Adaptive Huffman algorithm described in Sayood's Data
 * Compression book.  The ranks are not actually stored, but implicitly defined
 * by the location of a node within a doubly-linked list */

#define NYT HMAX					/* NYT = Not Yet Transmitted */
#define INTERNAL_NODE (HMAX+1)

typedef struct nodetype {
	struct	nodetype *left, *right, *parent; /* tree structure */ 
	struct	nodetype *next, *prev; /* doubly-linked list */
	struct	nodetype **head; /* highest ranked node in block */
	int		weight;
	int		symbol;
} node_t;

#define HMAX 256 /* Maximum symbol */

typedef struct {
	int			blocNode;
	int			blocPtrs;

	node_t*		tree;
	node_t*		lhead;
	node_t*		ltail;
	node_t*		loc[HMAX+1];
	node_t**	freelist;

	node_t		nodeList[768];
	node_t*		nodePtrs[768];
} huff_t;

typedef struct {
	huff_t		compressor;
	huff_t		decompressor;
} huffman_t;

void	Huff_Compress(msg_t *buf, int offset);
void	Huff_Decompress(msg_t *buf, int offset);
void	Huff_Init(huffman_t *huff);
void	Huff_addRef(huff_t* huff, byte ch);
int		Huff_Receive (node_t *node, int *ch, byte *fin);
void	Huff_transmit (huff_t *huff, int ch, byte *fout);
void	Huff_offsetReceive (node_t *node, int *ch, byte *fin, int *offset);
void	Huff_offsetTransmit (huff_t *huff, int ch, byte *fout, int *offset);
void	Huff_putBit( int bit, byte *fout, int *offset);
int		Huff_getBit( byte *fout, int *offset);

extern huffman_t clientHuffTables;

#define	SV_ENCODE_START		4
#define SV_DECODE_START		12
#define	CL_ENCODE_START		12
#define CL_DECODE_START		4

#endif // _QCOMMON_H_