cnq3/code/qcommon/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 "../qcommon/cm_public.h"


//
// msg.c
//
typedef struct {
	qbool	allowoverflow;	// if qfalse, do a Com_Error
	qbool	overflowed;		// set to qtrue if the buffer size failed (with allowoverflow set)
	qbool	oob;
	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, const msg_t* src );

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

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_WriteString (msg_t *sb, const char *s);
void MSG_WriteBigString (msg_t *sb, const char *s);

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

int		MSG_ReadBits( msg_t *msg, int bits );

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


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

void MSG_WriteDeltaEntity( msg_t* msg, const entityState_t* from, const entityState_t* to, qbool force );
void MSG_ReadDeltaEntity( msg_t* msg, const entityState_t* from, entityState_t* to, int number );

void MSG_WriteDeltaPlayerstate( msg_t* msg, const playerState_t* from, playerState_t* to );
void MSG_ReadDeltaPlayerstate( msg_t* msg, const playerState_t* from, playerState_t* 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,
} netadrtype_t;

typedef enum {
	NS_CLIENT,
	NS_SERVER
} netsrc_t;

typedef struct {
	netadrtype_t type;
	byte ip[4];
	unsigned short port;
} netadr_t;

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

qbool NET_CompareAdr( const netadr_t& a, const netadr_t& b );
qbool NET_CompareBaseAdr( const netadr_t& a, const netadr_t& b );
qbool NET_IsLocalAddress( const netadr_t& a );
const char* NET_AdrToString( const netadr_t& a );
qbool NET_StringToAdr( const char* s, netadr_t* a );
qbool 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


/*
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
	qbool	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 );

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


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

PROTOCOL

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

#define	PROTOCOL_VERSION	68

#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();
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);
vm_t	*VM_Restart( vm_t *vm );

intptr_t	QDECL VM_Call( vm_t *vm, int callNum, ... );

void	VM_Debug( int level );


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

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();
// 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_Execute();
// 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 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

// the functions that execute commands get their parameters with these
// if arg > argc, Cmd_Argv() will return "", not NULL, so string ops are always safe
int Cmd_Argc();
const char* Cmd_Argv(int arg);
const char* Cmd_Args();
const char* Cmd_ArgsFrom( int arg );
void Cmd_ArgvBuffer( int arg, char *buffer, int bufferLength );
void Cmd_ArgsBuffer( char *buffer, int bufferLength );
const char* Cmd_Cmd(); // note: this is NOT argv[0], it's the entire cmd as a raw string

// break a NUL-terminated string up into argc+argv
void Cmd_TokenizeString( const char* text );
void Cmd_TokenizeStringIgnoreQuotes( const char* text );

void Cmd_ExecuteString( const char* text );
// parse a single line of text into arguments and 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.

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

*/

// nothing outside the Cvar_*() functions should modify these fields!
typedef struct cvar_s {
	char		*name;
	char		*string;
	char		*resetString;		// cvar_restart will reset to this value
	char		*latchedString;		// for CVAR_LATCH vars
	int			flags;
	qboolean	modified;			// set each time the cvar is changed
	int			modificationCount;	// incremented each time the cvar is changed
	float		value;				// atof( string )
	int			integer;			// atoi( string )
	struct cvar_s *next;
	struct cvar_s *hashNext;
} cvar_t;


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 module's 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_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

const 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

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

qbool Cvar_Command();
// 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 qtrue.

void	Cvar_Init();

const char* Cvar_InfoString( int bit );
const 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 );

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.
==============================================================
*/

#define MAX_PAKFILES	1024

// hash a filename as a case- and OS- insensitive string with no extension
int Q_FileHash( const char* s, int tablesize );

// 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

qbool FS_Initialized();

void	FS_InitFilesystem();
void	FS_Shutdown( qbool closemfp );

qbool	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 );

qbool FS_FileExists( const char *file );

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

int		FS_LoadStack();

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

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, qbool uniqueFILE );
// if uniqueFILE is qtrue, then a new FILE will be fopened even if the file
// is found in an already open pak file.  If uniqueFILE is qfalse, 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 qtrue, because the majority of
// file IO goes through FS_ReadFile, which Does The Right Thing already.

qbool	FS_FileIsInPAK( const char* filename, int* pChecksum );

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!!!!!!!!)

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

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.

qbool FS_CheckDirTraversal(const char *checkdir);
qbool FS_idPak( const char* pak, const char* base );
qbool FS_ComparePaks( char *neededpaks, int len, qbool dlstring );

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

void FS_Remove( const char *osPath );
void FS_HomeRemove( const char *homePath );

void	FS_FilenameCompletion( const char *dir, const char *ext,
		qbool stripExt, void(*callback)(const char *s) );


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

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 );

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

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];

// returned by Sys_GetProcessorId
#define CPUID_GENERIC			0		// anything acceptable
#define CPUID_AXP				0x10
#define CPUID_UNSUPPORTED		0x20

// 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_DPrintf( const char *fmt, ... );
void		Com_Quit_f( void );
int			Com_EventLoop();
int			Com_Milliseconds();	// will be journaled properly
unsigned	Com_BlockChecksum( const void *buffer, int length );
char		*Com_MD5File(const char *filename, int length);
int			Com_HashKey(char *string, int maxlen);
int			Com_Filter( const char* filter, const char* name );
int			Com_FilterPath( const char* filter, const char* name );
int			Com_RealTime(qtime_t *qtime);
qbool	Com_SafeMode();

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_buildScript;		// for building release pak files
extern	cvar_t	*com_journal;

// 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;

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

extern	int		com_frameTime;

extern	qbool	com_errorEntered;

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 );
int Z_AvailableMemory( void );
// deliberately NOT overloading global new here
//void* operator new( size_t size ) { return Z_Malloc(size); }
template <class T> T* Z_New() { return (T*)Z_Malloc(sizeof(T)); }
template <class T> T* Z_New( int c ) { return (T*)Z_Malloc(sizeof(T) * c); }

void Hunk_Clear();
void Hunk_ClearToMark();
void Hunk_SetMark();
qbool Hunk_CheckMark();
void Hunk_ClearTempMemory();
void* Hunk_AllocateTempMemory( int size );
void Hunk_FreeTempMemory( void* buf );
int Hunk_MemoryRemaining();
template <class T> T* H_New( ha_pref heap ) { return (T*)Hunk_Alloc(sizeof(T), heap); }
template <class T> T* H_New( int c, ha_pref heap ) { return static_cast<T*>(Hunk_Alloc(sizeof(T) * c, heap)); }

void Com_TouchMemory();

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


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

CLIENT / SERVER SYSTEMS

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

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

void CL_Init();
void CL_Disconnect( qbool showMainMenu );
void CL_Shutdown();
void CL_Frame( int msec );
qbool CL_GameCommand();
void CL_KeyEvent (int key, qbool 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( const char* s );

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();
// 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


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


//
// UI interface
//
qbool UI_GameCommand();


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

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,	// 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 Sys_Init();
void Sys_Quit();

// general development dll loading for virtual machine testing
void* QDECL Sys_LoadDll( const char* name,
		intptr_t (QDECL **entryPoint)(int, ...), intptr_t (QDECL *systemcalls)(intptr_t, ...) );
void Sys_UnloadDll( void* dllHandle );

void	QDECL Sys_Error( const char *error, ...);
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();

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

int		Sys_GetProcessorId();

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

qbool	Sys_GetPacket( netadr_t* net_from, msg_t* net_message );
void	Sys_SendPacket( int length, const void *data, netadr_t to );

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

qbool	Sys_IsLANAddress( const netadr_t& adr );
void	Sys_ShowIP();

void Sys_Mkdir( const char* path );
const char* Sys_Cwd();
const char* Sys_GetCurrentUser();
const char* Sys_DefaultHomePath();

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

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

qbool Sys_LowPhysicalMemory( void );
unsigned int Sys_ProcessorCount( 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 HUFF_MAX 256 /* Maximum symbol */

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;

typedef struct {
	int			blocNode;
	int			blocPtrs;

	node_t*		tree;
	node_t*		lhead;
	node_t*		ltail;
	node_t*		loc[HUFF_MAX+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);

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

#endif // _QCOMMON_H_