qcommon.h

/*
===========================================================================
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 "cm_public.h"
#include "alias.h"
 
#ifdef __cplusplus
extern "C" {
#endif
 
//#define   PRE_RELEASE_DEMO
 
//============================================================================
 
//
// msg.c
//
typedef struct msg_s {
    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;
    size_t  maxsize;
    size_t  cursize;
    int     readcount;
    int     bit;                // for bitwise reads and writes
} msg_t;
 
void MSG_Init (msg_t *buf, byte *data, size_t length);
void MSG_InitOOB( msg_t *buf, byte *data, size_t length );
void MSG_Clear (msg_t *buf);
void MSG_WriteData (msg_t *buf, const void *data, size_t length);
void MSG_Bitstream(msg_t* buf);
qboolean MSG_IsProtocolVersion15();
 
// 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_WriteSVC( 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_WriteScrambledString(msg_t* sb, const char* s);
void MSG_WriteScrambledBigString(msg_t* sb, const char* s);
void MSG_WriteAngle16 (msg_t *sb, float f);
int MSG_HashKey(const char *string, int maxlen);
void MSG_WriteEntityNum(msg_t* sb, short number);
 
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_ReadSVC (msg_t *sb);
int     MSG_ReadShort (msg_t *sb);
int     MSG_ReadLong (msg_t *sb);
 
void MSG_ReadDir( msg_t *msg, vec3_t dir );
float MSG_ReadCoord( msg_t *msg );
void MSG_GetNullEntityState(entityState_t *nullState);
 
float   MSG_ReadFloat (msg_t *sb);
char    *MSG_ReadString (msg_t *sb);
char    *MSG_ReadBigString (msg_t *sb);
char    *MSG_ReadStringLine( msg_t *sb );
char* MSG_ReadScrambledString(msg_t* msg);
char* MSG_ReadScrambledBigString(msg_t* msg);
float   MSG_ReadAngle8( msg_t *sb );
float   MSG_ReadAngle16 (msg_t *sb);
void    MSG_ReadData (msg_t *sb, void *buffer, int size);
unsigned short MSG_ReadEntityNum(msg_t* sb);
 
 
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, float frameTime);
 
void MSG_ReadSounds (msg_t *msg, server_sound_t *sounds, int *snapshot_number_of_sounds);
void MSG_WriteSounds (msg_t *msg, server_sound_t *sounds, int snapshot_number_of_sounds);
 
void MSG_ReadDeltaEyeInfo(msg_t *msg, usereyes_t *from, usereyes_t *to);
 
void MSG_ReadDeltaEntity(msg_t* msg, entityState_t* from, entityState_t* to,
    int number, float frameTime);
 
void MSG_WriteDeltaEyeInfo (msg_t  *msg, usereyes_t *from, usereyes_t *to);
 
void MSG_WriteDeltaPlayerstate(msg_t* msg, struct playerState_s* from, struct playerState_s* to, float frameTime);
void MSG_ReadDeltaPlayerstate(msg_t* msg, struct playerState_s* from, struct playerState_s* to, float frameTime);
 
float MSG_ReadServerFrameTime(msg_t* msg, gameState_t* gameState);
void MSG_WriteServerFrameTime(msg_t* msg, float value);
 
void MSG_ReportChangeVectors_f( void );
 
//====================
// TA features
//====================
 
int MSG_PackAngle(float angle, int bits);
int MSG_PackAnimTime(float time, int bits);
int MSG_PackAnimWeight(float weight, int bits);
int MSG_PackScale(float scale, int bits);
int MSG_PackAlpha(float alpha, int bits);
int MSG_PackCoord(float coord);
int MSG_PackCoordExtra(float coord);
qboolean MSG_DeltaNeeded(const void* fromField, const void* toField, int fieldType, int bits, int size);
 
void MSG_WritePackedAngle(msg_t* msg, float value, int bits);
void MSG_WritePackedAnimTime(msg_t* msg, float fromValue, float toValue, float frameTime, int bits);
void MSG_WritePackedAnimWeight(msg_t* msg, float value, int bits);
void MSG_WritePackedScale(msg_t* msg, float value, int bits);
void MSG_WritePackedAlpha(msg_t* msg, float value, int bits);
void MSG_WritePackedCoord(msg_t* msg, float fromValue, float toValue, int bits);
void MSG_WritePackedCoordExtra(msg_t* msg, float fromValue, float toValue, int bits);
void MSG_WritePackedVelocity(msg_t* msg, float value, int bits);
void MSG_WritePackedSimple(msg_t* msg, int value, int bits);
 
float MSG_UnpackAngle(int value, int bits);
float MSG_UnpackAnimTime(int packed);
float MSG_UnpackAnimWeight(int result, int bits);
float MSG_UnpackScale(int packed);
float MSG_UnpackAlpha(int packed, int bits);
float MSG_UnpackCoord(int packed, int bits);
float MSG_UnpackCoordExtra(int packed, int bits);
 
//============================================================================
 
/*
==============================================================
 
NET
 
==============================================================
*/
 
#define NET_ENABLEV4            0x01
#define NET_ENABLEV6            0x02
// if this flag is set, always attempt ipv6 connections instead of ipv4 if a v6 address is found.
#define NET_PRIOV6              0x04
// disables ipv6 multicast support if set.
#define NET_DISABLEMCAST        0x08
 
#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   512         // max string commands buffered for restransmit
 
typedef enum {
    NA_BAD,                 // an address lookup failed
    NA_BOT,
    NA_LOOPBACK,
    NA_BROADCAST,
    NA_IP,
    NA_IPX,
    NA_BROADCAST_IPX,
    NA_IP6,
    NA_MULTICAST6,
    NA_UNSPEC
} netadrtype_t;
 
typedef enum {
    //NS_MASTER,
    NS_CLIENT,
    NS_SERVER
} netsrc_t;
 
#define NET_ADDRSTRMAXLEN 48    // maximum length of an IPv6 address string including trailing '\0'
typedef struct {
    netadrtype_t    type;
 
    byte    ip[4];
    byte    ip6[16];
    byte    ipx[10];
 
    unsigned short  port;
    unsigned long   scope_id;   // Needed for IPv6 link-local addresses
} netadr_t;
 
void        NET_Init( void );
void        NET_Shutdown( void );
void        NET_Restart_f( void );
void        NET_Config( qboolean enableNetworking );
void        NET_FlushPacketQueue(void);
void        NET_SendPacket (netsrc_t sock, size_t length, const void *data, netadr_t to);
void        QDECL NET_OutOfBandPrint( netsrc_t net_socket, netadr_t adr, const char *format, ...) Q_PRINTF_FUNC(3, 4);
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_CompareBaseAdrMask(netadr_t a, netadr_t b, int netmask);
qboolean    NET_CompareBaseAdr (netadr_t a, netadr_t b);
qboolean    NET_IsLocalAddress (netadr_t adr);
const char  *NET_AdrToString (netadr_t a);
const char  *NET_AdrToStringwPort (netadr_t a);
int     NET_StringToAdr ( const char *s, netadr_t *a, netadrtype_t family);
qboolean    NET_GetLoopPacket (netsrc_t sock, netadr_t *net_from, msg_t *net_message);
void        NET_JoinMulticast6(void);
void        NET_LeaveMulticast6(void);
void        NET_Sleep(int msec);
 
 
#define MAX_MSGLEN              49152       // max length of a message, which may
                                            // be fragmented into multiple packets
 
#define MAX_DOWNLOAD_WINDOW     48  // ACK window of 48 download chunks. Cannot set this higher, or clients
                        // will overflow the reliable commands buffer
#define MAX_DOWNLOAD_BLKSIZE        1024    // 896 byte block chunks
 
#define NETCHAN_GENCHECKSUM(challenge, sequence) ((challenge) ^ ((sequence) * (challenge)))
 
 
/*
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;
    size_t      unsentFragmentStart;
    size_t      unsentLength;
    byte        unsentBuffer[MAX_MSGLEN];
 
    int         challenge;
    int         lastSentTime;
    int         lastSentSize;
 
#ifdef LEGACY_PROTOCOL
    qboolean    compat;
#endif
} netchan_t;
 
/*
Packet profiling
*/
 
#define NETPROF_PACKET_FRAGMENTED 1
#define NETPROF_PACKET_DROPPED    2
#define NETPROF_PACKET_MESSAGE    4
 
#define NETPROX_MAX_PACKETS       64
 
typedef struct {
    int updateTime;
    int size;
    int flags;
} netprofpacket_t;
 
typedef struct {
    int updateTime;
    int index;
    netprofpacket_t packets[NETPROX_MAX_PACKETS];
 
    // Timing
    int lastCalcTime;
    int lowestUpdateTime;
    int highestUpdateTime;
 
    // Accumulators
    int totalPackets;
    int totalSize;
    int numFragmented;
    int numDropped;
    int numConnectionLess;
    int totalBytesConnectionLess;
 
    // Rates
    int packetsPerSec;
    int bytesPerSec;
 
    // Percentages
    int percentFragmented;
    int percentDropped;
    int percentConnectionLess;
 
    float latency;
} netprofpacketlist_t;
 
typedef struct {
    qboolean initialized;
    int rate;
    netprofpacketlist_t downstream;
    netprofpacketlist_t upstream;
} netprofclient_t;
 
void Netchan_Init( int qport );
void Netchan_Setup(netsrc_t sock, netchan_t *chan, netadr_t adr, int qport, int challenge, qboolean compat);
 
void Netchan_Transmit( netchan_t *chan, size_t length, const byte *data, netprofpacketlist_t *packetlist );
void Netchan_TransmitNextFragment( netchan_t *chan, netprofpacketlist_t *packetlist );
 
qboolean Netchan_Process( netchan_t *chan, msg_t *msg, netprofpacketlist_t *packetlist );
 
void NetProfileAddPacket(netprofpacketlist_t* list, size_t size, int flags);
void NetProfileSetPacketFlags(netprofpacketlist_t* list, int flags);
void NetProfileCalcStats(netprofpacketlist_t* list, int time);
 
/*
==============================================================
 
PROTOCOL
 
==============================================================
*/
 
#define PROTOCOL_VERSION            17
#define PROTOCOL_LEGACY_VERSION     PROTOCOL_VERSION
// su44: MoHAA v 1.00 uses protocol version 6
 
// maintain a list of compatible protocols for demo playing
// NOTE: that stuff only works with two digits protocols
extern int demo_protocols[];
 
// fixme : we need a new master server address
 
#define UPDATE_SERVER_NAME  "updatemoh.2015.com"
// override on command line, config files etc.
#ifndef MASTER_SERVER_NAME
#define MASTER_SERVER_NAME  "master.2015.com"
#endif
#ifndef AUTHORIZE_SERVER_NAME
#define AUTHORIZE_SERVER_NAME   "authorize.2015.com"
#endif
 
#define PORT_MASTER         27950
#define PORT_UPDATE         27951
#ifndef PORT_AUTHORIZE
#define PORT_AUTHORIZE      27952
#endif
#define PORT_SERVER         12203
#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_centerprint,
    svc_locprint,
    svc_cgameMessage,
    svc_EOF,
 
// new commands, supported only by ioquake3 protocol but not legacy
    svc_voipSpeex,     // not wrapped in USE_VOIP, so this value is reserved.
    svc_voipOpus,      //
};
 
//
// 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,
 
// new commands, supported only by ioquake3 protocol but not legacy
    clc_voipSpeex,   // not wrapped in USE_VOIP, so this value is reserved.
    clc_voipOpus,    //
};
 
/*
==============================================================
 
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;
 
typedef intptr_t (QDECL *vmMainProc)(int callNum, int arg0, int arg1, int arg2, int arg3, int arg4, int arg5, int arg6, int arg7, int arg8, int arg9, int arg10, int arg11);
 
void    VM_Init( void );
vm_t    *VM_Create( const char *module, intptr_t (*systemCalls)(intptr_t *), 
                   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);
void    VM_Forced_Unload_Start(void);
void    VM_Forced_Unload_Done(void);
vm_t    *VM_Restart(vm_t *vm, qboolean unpure);
 
intptr_t        QDECL VM_Call( vm_t *vm, int callNum, ... );
 
void    VM_Debug( int level );
 
void    *VM_ArgPtr( intptr_t intValue );
void    *VM_ExplicitArgPtr( vm_t *vm, intptr_t intValue );
 
#define VMA(x) VM_ArgPtr(args[x])
static ID_INLINE float _vmf(intptr_t x)
{
    floatint_t fi;
    fi.i = (int)x;
    return fi.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 (int msec);
// 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.
 
void Cmd_WriteAliases( fileHandle_t f );
 
//===========================================================================
 
/*
 
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 );
 
typedef void (*completionFunc_t)( const char *args, int argNum );
 
// don't allow VMs to remove system commands
void    Cmd_RemoveCommandSafe( const char *cmd_name );
 
void    Cmd_CommandCompletion( void(*callback)(const char *s) );
// callback with each valid string
void Cmd_SetCommandCompletionFunc( const char *command,
    completionFunc_t complete );
void Cmd_CompleteArgument( const char *command, char *args, int argNum );
void Cmd_CompleteCfgName( const char *args, int argNum );
void    Cmd_CommandCompletion( void(*callback)(const char *s) );
const char* Cmd_CompleteCommandByNumber(const char* partial, int number);
// 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);
void    Cmd_Args_Sanitize( 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 );
void    Cmd_TokenizeStringIgnoreQuotes( const char *text_in );
// 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.
 
*/
 
// sets the default value of a variable
void Cvar_SetDefault( cvar_t *var, const char *var_value );
 
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
 
cvar_t  *Cvar_Set2( const char *var_name, const char *value, qboolean force );
// will create the variable with no flags if it doesn't exist
// can force
 
cvar_t  *Cvar_Next( cvar_t *var );
// gets the next var
 
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
 
cvar_t  *Cvar_FindVar( const char *var_name );
float   Cvar_VariableValue( const char *var_name );
int     Cvar_VariableIntegerValue(const char* var_name);
float   Cvar_VariableFloatValue(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 );
 
// find a compelte variable
const char *Cvar_CompleteVariable( const char *partial );
const char *Cvar_CompleteVariableByNumber( const char *partial, int number );
// returns an empty string if not defined
 
int Cvar_Flags(const char *var_name);
// returns CVAR_NONEXISTENT if cvar doesn't exist or the flags of that particular CVAR.
 
void    Cvar_CommandCompletion( void(*callback)(const char *s) );
// callback with each valid string
 
void    Cvar_Reset( const char *var_name );
void    Cvar_ForceReset(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_CheckRange( cvar_t *cv, float minVal, float maxVal, qboolean shouldBeIntegral );
void Cvar_SetDescription( cvar_t *var, const char *var_description );
 
void    Cvar_Restart(qboolean unsetVM);
void    Cvar_Restart_f( void );
void    Cvar_SaveGameRestart_f( void );
 
void    Cvar_CompleteCvarName(const char* args, int argNum);
 
cvar_t  *Cvar_Unset(cvar_t *cv);
 
extern  int         cvar_modifiedFlags;
extern  qboolean    cvar_global_force;
// 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     5
 
#define MAX_FILE_HANDLES    64
 
#ifdef DEDICATED
#   define Q3CONFIG_CFG CONFIG_PREFIX "_server.cfg"
#else
#   define Q3CONFIG_CFG CONFIG_PREFIX ".cfg"
#endif
 
qboolean FS_Initialized( void );
 
void    FS_InitFilesystem( void );
void    FS_Shutdown( qboolean closemfp );
 
qboolean    FS_ConditionalRestart( int checksumFeed, qboolean disconnect );
void    FS_Restart( int checksumFeed );
// shutdown and restart the filesystem so changes to fs_gamedir can take effect
 
char    **FS_ListFilteredFiles( const char *path, const char *extension, const char *filter, qboolean wantSubs, int *numfiles, qboolean allowNonPureFilesOnDisk );
char    **FS_ListFiles( const char *directory, const char *extension, qboolean wantSubs, 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_HomeConfig( const char *file );
qboolean FS_FileExists_HomeData( const char *file );
qboolean FS_FileExists_HomeState( const char *file );
 
void FS_CorrectCase(char* path);
qboolean FS_CreatePath (const char *OSPath);
 
char    *FS_BaseDir_BuildOSPath( const char *base, const char *qpath );
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 );
 
void    FS_GetModDescription(const char* modDir, char* description, int descriptionLen);
 
fileHandle_t    FS_FOpenFileWrite_HomeConfig( const char *filename );
fileHandle_t    FS_FOpenFileWrite_HomeData( const char *filename );
fileHandle_t    FS_FOpenFileWrite_HomeState( const char *filename );
fileHandle_t    FS_FOpenFileAppend_HomeData( const char *filename );
fileHandle_t    FS_FCreateOpenPipeFile( const char *filename );
fileHandle_t    FS_FOpenTextFileWrite_HomeConfig(const char* qpath);
fileHandle_t    FS_FOpenTextFileWrite_HomeData(const char* qpath);
fileHandle_t    FS_FOpenTextFileWrite_HomeState(const char* qpath);
// will properly create any needed paths and deal with seperater character issues
 
fileHandle_t FS_BaseDir_FOpenFileWrite_HomeConfig( const char *filename );
fileHandle_t FS_BaseDir_FOpenFileWrite_HomeData( const char *filename );
fileHandle_t FS_BaseDir_FOpenFileWrite_HomeState( const char *filename );
long        FS_BaseDir_FOpenFileRead( const char *filename, fileHandle_t *fp );
void    FS_BaseDir_Rename_HomeData( const char *from, const char *to, qboolean safe );
void    FS_CanonicalFilename( char *filename );
 
long    FS_FOpenFileRead(const char* filename, fileHandle_t* file, qboolean uniqueFILE, qboolean quiet);
// 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
 
size_t  FS_Write( const void *buffer, size_t len, fileHandle_t f );
 
size_t  FS_Read( void *buffer, size_t 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
 
long        FS_ReadFileEx(const char* qpath, void** buffer, qboolean quiet);
long        FS_ReadFile(const char* qpath, void** buffer);
const char  *FS_Gamedir( void );
// 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
 
 
const char  *FS_PrepFileWrite( const char *filename );
// prepares the file to be written
 
int     FS_WriteFile( const char *qpath, const void *buffer, int size );
// writes a complete file, creating any subdirectories needed
 
void    FS_WriteTextFile( const char *qpath, const void *buffer, int size );
// writes a complete text file, creating any subdirectories needed
 
long 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, ... ) Q_PRINTF_FUNC(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 );
qboolean FS_FileNewer( const char *source, const char *destination );
 
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_CheckDirTraversal(const char *checkdir);
qboolean FS_idPak(const char *pak, const char *base);
qboolean FS_ComparePaks( char *neededpaks, int len, qboolean dlstring );
 
void FS_Remove( const char *osPath );
void FS_Remove_HomeData( const char *homePath );
 
void    FS_FilenameCompletion( const char *dir, const char *ext,
        qboolean stripExt, void(*callback)(const char *s), qboolean allowNonPureFilesOnDisk );
 
const char* FS_GetCurrentGameDir();
void    FS_GetRelativeFilename( const char *currentDirectory, const char *absoluteFilename, char *out, size_t destlen );
 
void FS_FileTime(const char* filename, char* date, char* size);
 
void FS_CorrectCase(char* path);
 
extern cvar_t* fs_debug;
extern cvar_t* fs_mapdir;
 
/*
==============================================================
 
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_AutoComplete( field_t *edit );
void Field_CompleteKeyname( void );
void Field_CompleteFilename( const char *dir,
        const char *ext, qboolean stripExt, qboolean allowNonPureFilesOnDisk );
void Field_CompleteCommand( char *cmd,
        qboolean doCommands, qboolean doCvars );
void Field_CompletePlayerName( const char **names, int count );
/*
==============================================================
 
MISC
 
==============================================================
*/
 
// 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!
 
/*
==============================================================
 
MISC
 
==============================================================
*/
 
// vsnprintf is ISO/IEC 9899:1999
// abstracting this to make it portable
#ifdef _WIN32
#define Q_vsnprintf _vsnprintf
#define Q_snprintf _snprintf
#else
#define Q_vsnprintf vsnprintf
#define Q_snprintf snprintf
#endif
 
// centralizing the declarations for cl_cdkey
// https://zerowing.idsoftware.com/bugzilla/show_bug.cgi?id=470
extern char cl_cdkey[34];
 
// returned by Sys_GetProcessorFeatures
typedef enum
{
  CF_RDTSC      = 1 << 0,
  CF_MMX        = 1 << 1,
  CF_MMX_EXT    = 1 << 2,
  CF_3DNOW      = 1 << 3,
  CF_3DNOW_EXT  = 1 << 4,
  CF_SSE        = 1 << 5,
  CF_SSE2       = 1 << 6,
  CF_ALTIVEC    = 1 << 7
} cpuFeatures_t;
 
// centralized and cleaned, that's the max string you can send to a Com_Printf / Com_DPrintf (above gets truncated)
#define MAXPRINTMSG 4096
 
 
#define MAX_RENDER_STRINGS          8
#define MAX_RENDER_STRING_LENGTH    32
 
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, ... ) Q_PRINTF_FUNC(1, 2);
void        QDECL Com_DPrintf( const char *fmt, ... ) Q_PRINTF_FUNC(1, 2);
void        QDECL Com_Error( int code, const char *fmt, ... ) Q_NO_RETURN Q_PRINTF_FUNC(2, 3);
void        Com_Quit_f( void ) Q_NO_RETURN;
void        Com_GameRestart(int checksumFeed, qboolean disconnect);
 
int         Com_Milliseconds( void );   // will be journaled properly
unsigned    Com_BlockChecksum( const void *buffer, int length );
char        *Com_MD5File(const char *filename, int length, const char *prefix, int prefix_len);
int         Com_HashKey(char *string, int maxlen);
int         Com_Filter(const char *filter, const char *name, int casesensitive);
int         Com_FilterPath(const char *filter, const char *name, int casesensitive);
int         Com_RealTime(qtime_t *qtime);
qboolean    Com_SafeMode( void );
void        Com_RunAndTimeServerPacket(netadr_t *evFrom, msg_t *buf);
 
qboolean    Com_IsVoipTarget(uint8_t *voipTargets, int voipTargetsSize, int clientNum);
 
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.
qboolean        Com_PlayerNameToFieldString( char *str, int length, const char *name );
qboolean        Com_FieldStringToPlayerName( char *name, int length, const char *rawname );
int QDECL   Com_strCompare( const void *a, const void *b );
 
 
extern  float currentfps;
extern  cvar_t  *paused;
extern  cvar_t  *config;
extern  cvar_t  *fps;
extern  cvar_t  *fps_location;
extern  cvar_t  *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_shortversion;
extern  cvar_t  *com_version;
extern  cvar_t  *autopaused;
extern  cvar_t  *deathmatch;
extern  cvar_t  *com_blood;
extern  cvar_t  *com_buildScript;       // for building release pak files
extern  cvar_t  *com_radar_range;
extern  cvar_t  *console_spam_filter;
extern  cvar_t  *com_journal;
extern  cvar_t  *com_cameraMode;
extern  cvar_t  *com_ansiColor;
extern  cvar_t  *com_unfocused;
extern  cvar_t  *com_maxfpsUnfocused;
extern  cvar_t  *com_minimized;
extern  cvar_t  *com_maxfpsMinimized;
extern  cvar_t  *com_altivec;
extern  cvar_t  *com_standalone;
extern  cvar_t  *com_gamename;
extern  cvar_t  *com_basegame;
extern  cvar_t  *com_homepath;
extern  cvar_t  *com_altivec;
 
// both client and server must agree to pause
extern  cvar_t  *cl_paused;
extern  cvar_t  *sv_paused;
 
extern  cvar_t  *cl_packetdelay;
extern  cvar_t  *sv_packetdelay;
 
extern  cvar_t* com_protocol;
#ifdef LEGACY_PROTOCOL
extern  cvar_t* com_legacyprotocol;
#endif
#ifndef DEDICATED
extern  cvar_t* con_autochat;
#endif
extern  cvar_t* com_target_game;
extern  cvar_t* com_target_shortversion;
extern  cvar_t* com_target_version;
extern  cvar_t* com_target_extension;
extern  cvar_t* com_target_demo;
 
extern  cvar_t* com_updatecheck_enabled;
extern  cvar_t* com_updatecheck_interval;
 
extern  int     protocol_version_demo;
extern  int     protocol_version_full;
 
// 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  qboolean    com_fullyInitialized;
extern  qboolean    com_gotOriginalConfig;
extern  qboolean    com_firstConfig;
 
extern  fileHandle_t    com_journalFile;
extern  fileHandle_t    com_journalDataFile;
 
typedef enum {
    TAG_FREE,
    TAG_CONST,
    TAG_GENERAL,
    TAG_BOTLIB,
    TAG_RENDERER,               // memory allocated from renderer
    TAG_GAME,                   // memory allocated from game
    TAG_CGAME,                  // memory allocated from client game
    TAG_CLIENT,                 // memory allocated from client
    TAG_TIKI,                   // su44: memory allocated by qcommon/tiki.c code
    TAG_STRINGS_AND_COMMANDS,
    TAG_SOUND,                  // memory allocated from sound
    TAG_STATIC,
    TAG_STATIC_RENDERER,
    TAG_SKEL,                   // memory allocated from skeletor
    TAG_TEMP,                   // temporary memory
    TAG_EXE,
    TAG_NUM_TOTAL_TAGS
} 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, const char *label, const char *file, int line ); // NOT 0 filled memory
void *Z_MallocDebug( int size, const char *label, const char *file, int line );         // returns 0 filled memory
void *S_MallocDebug( int size, const char *label, const 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 Com_TouchMemory( void );
 
const char* Z_EmptyStringPointer(void);
const char* Z_NumberStringPointer(int iNum);
 
// commandLine should not include the executable name (argv[0])
void Com_Init( char *commandLine );
void Com_Frame( void );
void Com_Shutdown( void );
 
qboolean Com_SanitizeName( const char *pszOldName, char *pszNewName, size_t bufferSize );
const char *Com_GetArchiveFileName( const char *filename, const char *extension );
const char *Com_GetArchiveFolder();
void Com_WipeSavegame( const char *savename );
qboolean Com_ShiftedStrStr(const char* shifted, const char* name, int offset);
qboolean COM_IsMapValid(const char* name);
void Com_SwapSaveStruct(savegamestruct_t* save);
 
 
/*
==============================================================
 
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();
void CL_AbnormalDisconnect();
void CL_Shutdown(const char *finalmsg, qboolean disconnect, qboolean quit);
qboolean CL_FinishedIntro(void);
void CL_FinishedStartStage(void);
void CL_SetFrameNumber(int frameNumber);
void CL_Frame( int msec );
qboolean CL_GameCommand( void );
void CL_KeyEvent (int key, qboolean down, unsigned time);
 
void CL_Key_ForceCommand(int key, unsigned int time);
 
void CL_CharEvent( int key );
// char events are for field typing, not game control
 
void CL_GetMouseState( int *x, int *y, unsigned int *buttons );
 
void CL_SetMousePos( int x, int y );
 
void CL_MouseEvent( int dx, int dy, int time );
 
void CL_ClearButtons( void );
 
void CL_JoystickEvent( int axis, int value, int time );
 
void CL_PacketEvent( netadr_t from, msg_t *msg );
 
void CL_MapLoading( qboolean flush, const char *pszMapName );
// 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.
 
qboolean CL_UseLargeLightmap(const char* mapName);
// returns true if the standard BSP file should be used
 
void CL_CDDialog( void );
// bring up the "need a cd to play" dialog
 
void CL_FlushMemory( void );
// dump all memory on an error
 
void CL_ShutdownAll(qboolean shutdownRef);
// shutdown client
 
void CL_InitRef(void);
// initialize renderer interface
 
void CL_StartHunkUsers( qboolean rendererOnly );
// start all the client stuff using the hunk
 
void CL_Snd_Shutdown(void);
// Restart sound subsystem
 
void Key_KeynameCompletion( void(*callback)(const char *s) );
// for keyname autocompletion
 
void Key_WriteBindings( fileHandle_t f );
// for writing the config files
 
void S_ClearSoundBuffer( void );
// call before filesystem access
 
float *get_camera_offset( qboolean *lookactive, qboolean *resetview );
 
// AVI files have the start of pixel lines 4 byte-aligned
#define AVI_LINE_PADDING 4
 
//
// server interface
//
void SV_ServerLoaded( void );
void SV_Init( void );
void SV_Shutdown( const char *finalmsg );
void SV_SetFrameNumber(int frameNumber);
void SV_Frame( int msec );
void SV_PacketEvent( netadr_t from, msg_t *msg );
int SV_FrameMsec(void);
void SV_CheckSaveGame(void);
qboolean SV_GameCommand(void);
int SV_SendQueuedPackets(void);
 
//
// input interface
//
void IN_Init(void *windowData);
void IN_Frame(void);
void IN_Shutdown(void);
void IN_Restart(void);
void IN_GetMousePosition(int *x, int *y);
 
typedef void (*pCursorFree)(byte *pic);
qboolean IN_SetCursorFromImage(const byte *pic, int width, int height, pCursorFree cursorFreeFn);
void IN_FreeCursor();
qboolean IN_IsCursorActive();
 
void Com_Pause();
void Com_Unpause();
void Com_FakePause();
void Com_FakeUnpause();
void Com_Pause_f();
void SV_SoundCallback( int entnum, int channel_number, const char *name );
 
int R_CountTextureMemory();
/*
==============================================================
 
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 {
    // SE_NONE must be 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;
    size_t          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        Com_QueueEvent( int time, sysEventType_t type, int value, int value2, size_t ptrLength, void *ptr );
int         Com_EventLoop( void );
sysEvent_t  Com_GetSystemEvent( void );
 
void    Sys_Init (void);
 
// general development dll loading for virtual machine testing
void    Sys_UnloadDll( void *dllHandle );
 
qboolean Sys_DllExtension(const char* name);
 
void    Sys_UnloadGame( void );
void    *Sys_GetGameAPI( void *parms );
 
void    Sys_UnloadCGame( void );
void    *Sys_GetCGameAPI( void *parms );
 
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, ...) Q_NO_RETURN Q_PRINTF_FUNC(1, 2);
void    Sys_Quit (void) Q_NO_RETURN;
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);
 
qboolean Sys_RandomBytes( byte *string, int len );
 
// the system console is shown when a dedicated server is running
void    Sys_DisplaySystemConsole( qboolean show );
 
cpuFeatures_t Sys_GetProcessorFeatures( void );
 
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, netadrtype_t family );
qboolean Sys_GetPacket( netadr_t *net_from, msg_t *net_message );
 
//Does NOT parse port numbers, only base addresses.
 
qboolean    Sys_IsLANAddress (netadr_t adr);
void        Sys_ShowIP(void);
 
FILE    *Sys_FOpen( const char *ospath, const char *mode );
qboolean Sys_Mkdir( const char *path );
FILE    *Sys_Mkfifo( const char *ospath );
char    *Sys_Cwd( void );
void    Sys_SetDefaultInstallPath(const char *path);
char    *Sys_DefaultInstallPath(void);
char    *Sys_SteamPath(void);
char    *Sys_GogPath(void);
char    *Sys_MicrosoftStorePath(void);
 
#ifdef __APPLE__
char    *Sys_DefaultAppPath(void);
#endif
 
char    *Sys_DefaultHomeConfigPath(void);
char    *Sys_DefaultHomeDataPath(void);
char    *Sys_DefaultHomeStatePath(void);
const char *Sys_Dirname( char *path );
const char *Sys_Basename( char *path );
char *Sys_ConsoleInput( void );
 
void    SetProgramPath( const char *path );
char    *Sys_DefaultBasePath( void );
char    *Sys_DefaultUserPath( void );
char    *Sys_DefaultOutputPath( void );
 
char **Sys_ListFiles( const char *directory, const char *extension, const char *filter, int *numfiles, qboolean wantsubs );
void    Sys_FreeFileList( char **list );
void    Sys_Sleep(int msec);
 
void Sys_InitStreamThread(void);
void Sys_ShutdownStreamThread(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);
 
qboolean Sys_LowPhysicalMemory(void);
 
void Sys_SetEnv(const char* name, const char* value);
 
void SetNormalThreadPriority( void );
void SetBelowNormalThreadPriority( void );
 
void RecoverLostAutodialData( void );
 
void Sys_CloseMutex( void );
void Sys_ShowConsole( int visLevel, qboolean quitOnClose );
void Sys_DebugPrint(const char* message);
void Sys_PumpMessageLoop( void );
 
qboolean SaveRegistryInfo( qboolean user, const char *pszName, void *pvBuf, long lSize );
qboolean LoadRegistryInfo( qboolean user, const char *pszName, void *pvBuf, long *plSize );
 
qboolean IsFirstRun( void );
qboolean IsNewConfig( void );
qboolean IsSafeMode( void );
void ClearNewConfigFlag( void );
const char *Sys_GetWholeClipboard( void );
void Sys_SetClipboard( const char *contents );
 
typedef enum
{
    DR_YES = 0,
    DR_NO = 1,
    DR_OK = 0,
    DR_CANCEL = 1
} dialogResult_t;
 
typedef enum
{
    DT_INFO,
    DT_WARNING,
    DT_ERROR,
    DT_YES_NO,
    DT_OK_CANCEL
} dialogType_t;
 
dialogResult_t Sys_Dialog( dialogType_t type, const char *message, const char *title );
qboolean Sys_OpenFolderInFileManager( const char *path, qboolean create );
 
void Sys_RemovePIDFile( const char *gamedir );
void Sys_InitPIDFile( const char *gamedir );
 
void Sys_ProcessBackgroundTasks();
 
/* 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, int maxoffset);
void    Huff_offsetReceive (node_t *node, int *ch, byte *fin, int *offset, int maxoffset);
void    Huff_offsetTransmit (huff_t *huff, int ch, byte *fout, int *offset, int maxoffset);
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
 
// flags for sv_allowDownload and cl_allowDownload
#define DLF_ENABLE 1
#define DLF_NO_REDIRECT 2
#define DLF_NO_UDP 4
#define DLF_NO_DISCONNECT 8
 
#ifdef __cplusplus
}
#endif
 
#endif // _QCOMMON_H_