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

Return to Castle Wolfenstein single player GPL Source Code
Copyright (C) 1999-2010 id Software LLC, a ZeniMax Media company. 

This file is part of the Return to Castle Wolfenstein single player GPL Source Code (RTCW SP Source Code).  

RTCW SP 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 3 of the License, or
(at your option) any later version.

RTCW SP 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 RTCW SP Source Code.  If not, see <http://www.gnu.org/licenses/>.

In addition, the RTCW SP Source Code is also subject to certain additional terms. You should have received a copy of these additional terms immediately following the terms and conditions of the GNU General Public License which accompanied the RTCW SP Source Code.  If not, please request a copy in writing from id Software at the address below.

If you have questions concerning this license or the applicable additional terms, you may contact in writing id Software LLC, c/o ZeniMax Media Inc., Suite 120, Rockville, Maryland 20850 USA.

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


// cmdlib.c

#include "l_cmd.h"
#include "l_log.h"
#include "l_mem.h"
#include <sys/types.h>
#include <sys/stat.h>

#ifndef SIN
#define SIN
#endif //SIN

#if defined( WIN32 ) || defined( _WIN32 )
#include <direct.h>
#else
#include <unistd.h>
#endif

#ifdef NeXT
#include <libc.h>
#endif

#define BASEDIRNAME "wolf"
#define PATHSEPERATOR   '/'

// set these before calling CheckParm
int myargc;
char **myargv;

char com_token[1024];
qboolean com_eof;

qboolean archive;
char archivedir[1024];


/*
===================
ExpandWildcards

Mimic unix command line expansion
===================
*/
#define MAX_EX_ARGC 1024
int ex_argc;
char    *ex_argv[MAX_EX_ARGC];
#ifdef _WIN32
#include "io.h"
void ExpandWildcards( int *argc, char ***argv ) {
	struct _finddata_t fileinfo;
	int handle;
	int i;
	char filename[1024];
	char filebase[1024];
	char    *path;

	ex_argc = 0;
	for ( i = 0 ; i < *argc ; i++ )
	{
		path = ( *argv )[i];
		if ( path[0] == '-'
			 || ( !strstr( path, "*" ) && !strstr( path, "?" ) ) ) {
			ex_argv[ex_argc++] = path;
			continue;
		}

		handle = _findfirst( path, &fileinfo );
		if ( handle == -1 ) {
			return;
		}

		ExtractFilePath( path, filebase );

		do
		{
			sprintf( filename, "%s%s", filebase, fileinfo.name );
			ex_argv[ex_argc++] = copystring( filename );
		} while ( _findnext( handle, &fileinfo ) != -1 );

		_findclose( handle );
	}

	*argc = ex_argc;
	*argv = ex_argv;
}
#else
void ExpandWildcards( int *argc, char ***argv ) {
}
#endif

#ifdef WINBSPC

#include <windows.h>

HWND program_hwnd;

void SetProgramHandle( HWND hwnd ) {
	program_hwnd = hwnd;
} //end of the function SetProgramHandle

/*
=================
Error

For abnormal program terminations in windowed apps
=================
*/
void Error( char *error, ... ) {
	va_list argptr;
	char text[1024];
	char text2[1024];
	int err;

	err = GetLastError();

	va_start( argptr, error );
	vsprintf( text, error, argptr );
	va_end( argptr );

	sprintf( text2, "%s\nGetLastError() = %i", text, err );
	MessageBox( program_hwnd, text2, "Error", 0 /* MB_OK */ );

	Log_Write( text );
	Log_Close();

	exit( 1 );
} //end of the function Error

void Warning( char *szFormat, ... ) {
	char szBuffer[256];
	va_list argptr;

	va_start( argptr, szFormat );
	vsprintf( szBuffer, szFormat, argptr );
	va_end( argptr );

	MessageBox( program_hwnd, szBuffer, "Warning", MB_OK );

	Log_Write( szBuffer );
} //end of the function Warning


#else
/*
=================
Error

For abnormal program terminations in console apps
=================
*/
void Error( char *error, ... ) {
	va_list argptr;
	char text[1024];

	va_start( argptr, error );
	vsprintf( text, error, argptr );
	va_end( argptr );
	printf( "ERROR: %s\n", text );

	Log_Write( text );
	Log_Close();

	exit( 1 );
} //end of the function Error

void Warning( char *warning, ... ) {
	va_list argptr;
	char text[1024];

	va_start( argptr, warning );
	vsprintf( text, warning, argptr );
	va_end( argptr );
	printf( "WARNING: %s\n", text );

	Log_Write( text );
} //end of the function Warning

#endif

//only printf if in verbose mode
qboolean verbose = true;

void qprintf( char *format, ... ) {
	va_list argptr;
#ifdef WINBSPC
	char buf[2048];
#endif //WINBSPC

	if ( !verbose ) {
		return;
	}

	va_start( argptr,format );
#ifdef WINBSPC
	vsprintf( buf, format, argptr );
	WinBSPCPrint( buf );
#else
	vprintf( format, argptr );
#endif //WINBSPC
	va_end( argptr );
} //end of the function qprintf

void Com_Error( int level, char *error, ... ) {
	va_list argptr;
	char text[1024];

	va_start( argptr, error );
	vsprintf( text, error, argptr );
	va_end( argptr );
	Error( text );
} //end of the funcion Com_Error

void Com_Printf( const char *fmt, ... ) {
	va_list argptr;
	char text[1024];

	va_start( argptr, fmt );
	vsprintf( text, fmt, argptr );
	va_end( argptr );
	Log_Print( text );
} //end of the funcion Com_Printf

/*

qdir will hold the path up to the quake directory, including the slash

  f:\quake \
  /raid/quake/

gamedir will hold qdir + the game directory (id1, id2, etc)

  */

char qdir[1024];
char gamedir[1024];

void SetQdirFromPath( char *path ) {
	char temp[1024];
	char    *c;
	int len;

	if ( !( path[0] == '/' || path[0] == '\\' || path[1] == ':' ) ) { // path is partial
		Q_getwd( temp );
		strcat( temp, path );
		path = temp;
	}

	// search for "quake2" in path

	len = strlen( BASEDIRNAME );
	for ( c = path + strlen( path ) - 1 ; c != path ; c-- )
		if ( !Q_strncasecmp( c, BASEDIRNAME, len ) ) {
			strncpy( qdir, path, c + len + 1 - path );
			qprintf( "qdir: %s\n", qdir );
			c += len + 1;
			while ( *c )
			{
				if ( *c == '/' || *c == '\\' ) {
					strncpy( gamedir, path, c + 1 - path );
					qprintf( "gamedir: %s\n", gamedir );
					return;
				}
				c++;
			}
			Error( "No gamedir in %s", path );
			return;
		}
	Error( "SetQdirFromPath: no '%s' in %s", BASEDIRNAME, path );
}

char *ExpandArg( char *path ) {
	static char full[1024];

	if ( path[0] != '/' && path[0] != '\\' && path[1] != ':' ) {
		Q_getwd( full );
		strcat( full, path );
	} else {
		strcpy( full, path );
	}
	return full;
}

char *ExpandPath( char *path ) {
	static char full[1024];
	if ( !qdir ) {
		Error( "ExpandPath called without qdir set" );
	}
	if ( path[0] == '/' || path[0] == '\\' || path[1] == ':' ) {
		return path;
	}
	sprintf( full, "%s%s", qdir, path );
	return full;
}

char *ExpandPathAndArchive( char *path ) {
	char    *expanded;
	char archivename[1024];

	expanded = ExpandPath( path );

	if ( archive ) {
		sprintf( archivename, "%s/%s", archivedir, path );
		QCopyFile( expanded, archivename );
	}
	return expanded;
}


char *copystring( char *s ) {
	char    *b;
	b = GetMemory( strlen( s ) + 1 );
	strcpy( b, s );
	return b;
}



/*
================
I_FloatTime
================
*/
double I_FloatTime( void ) {
	time_t t;

	time( &t );

	return t;
#if 0
// more precise, less portable
	struct timeval tp;
	struct timezone tzp;
	static int secbase;

	gettimeofday( &tp, &tzp );

	if ( !secbase ) {
		secbase = tp.tv_sec;
		return tp.tv_usec / 1000000.0;
	}

	return ( tp.tv_sec - secbase ) + tp.tv_usec / 1000000.0;
#endif
}

void Q_getwd( char *out ) {
#if defined( WIN32 ) || defined( _WIN32 )
	getcwd( out, 256 );
	strcat( out, "\\" );
#else
	getwd( out );
	strcat( out, "/" );
#endif
}


void Q_mkdir( char *path ) {
#ifdef WIN32
	if ( _mkdir( path ) != -1 ) {
		return;
	}
#else
	if ( mkdir( path, 0777 ) != -1 ) {
		return;
	}
#endif
	if ( errno != EEXIST ) {
		Error( "mkdir %s: %s",path, strerror( errno ) );
	}
}

/*
============
FileTime

returns -1 if not present
============
*/
int FileTime( char *path ) {
	struct  stat buf;

	if ( stat( path,&buf ) == -1 ) {
		return -1;
	}

	return buf.st_mtime;
}



/*
==============
COM_Parse

Parse a token out of a string
==============
*/
char *COM_Parse( char *data ) {
	int c;
	int len;

	len = 0;
	com_token[0] = 0;

	if ( !data ) {
		return NULL;
	}

// skip whitespace
skipwhite:
	while ( ( c = *data ) <= ' ' )
	{
		if ( c == 0 ) {
			com_eof = true;
			return NULL;            // end of file;
		}
		data++;
	}

// skip // comments
	if ( c == '/' && data[1] == '/' ) {
		while ( *data && *data != '\n' )
			data++;
		goto skipwhite;
	}


// handle quoted strings specially
	if ( c == '\"' ) {
		data++;
		do
		{
			c = *data++;
			if ( c == '\"' ) {
				com_token[len] = 0;
				return data;
			}
			com_token[len] = c;
			len++;
		} while ( 1 );
	}

// parse single characters
	if ( c == '{' || c == '}' || c == ')' || c == '(' || c == '\'' || c == ':' ) {
		com_token[len] = c;
		len++;
		com_token[len] = 0;
		return data + 1;
	}

// parse a regular word
	do
	{
		com_token[len] = c;
		data++;
		len++;
		c = *data;
		if ( c == '{' || c == '}' || c == ')' || c == '(' || c == '\'' || c == ':' ) {
			break;
		}
	} while ( c > 32 );

	com_token[len] = 0;
	return data;
}


int Q_strncasecmp( char *s1, char *s2, int n ) {
	int c1, c2;

	do
	{
		c1 = *s1++;
		c2 = *s2++;

		if ( !n-- ) {
			return 0;       // strings are equal until end point

		}
		if ( c1 != c2 ) {
			if ( c1 >= 'a' && c1 <= 'z' ) {
				c1 -= ( 'a' - 'A' );
			}
			if ( c2 >= 'a' && c2 <= 'z' ) {
				c2 -= ( 'a' - 'A' );
			}
			if ( c1 != c2 ) {
				return -1;      // strings not equal
			}
		}
	} while ( c1 );

	return 0;       // strings are equal
}

int Q_strcasecmp( char *s1, char *s2 ) {
	return Q_strncasecmp( s1, s2, 99999 );
}

int Q_stricmp( char *s1, char *s2 ) {
	return Q_strncasecmp( s1, s2, 99999 );
}

void Q_strncpyz( char *dest, const char *src, int destsize ) {
	strncpy( dest, src, destsize - 1 );
	dest[destsize - 1] = 0;
}

char *strupr( char *start ) {
	char    *in;
	in = start;
	while ( *in )
	{
		*in = toupper( *in );
		in++;
	}
	return start;
}

char *strlower( char *start ) {
	char    *in;
	in = start;
	while ( *in )
	{
		*in = tolower( *in );
		in++;
	}
	return start;
}


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

						MISC FUNCTIONS

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


/*
=================
CheckParm

Checks for the given parameter in the program's command line arguments
Returns the argument number (1 to argc-1) or 0 if not present
=================
*/
int CheckParm( char *check ) {
	int i;

	for ( i = 1; i < myargc; i++ )
	{
		if ( !Q_strcasecmp( check, myargv[i] ) ) {
			return i;
		}
	}

	return 0;
}



/*
================
Q_filelength
================
*/
int Q_filelength( FILE *f ) {
	int pos;
	int end;

	pos = ftell( f );
	fseek( f, 0, SEEK_END );
	end = ftell( f );
	fseek( f, pos, SEEK_SET );

	return end;
}


FILE *SafeOpenWrite( char *filename ) {
	FILE    *f;

	f = fopen( filename, "wb" );

	if ( !f ) {
		Error( "Error opening %s: %s",filename,strerror( errno ) );
	}

	return f;
}

FILE *SafeOpenRead( char *filename ) {
	FILE    *f;

	f = fopen( filename, "rb" );

	if ( !f ) {
		Error( "Error opening %s: %s",filename,strerror( errno ) );
	}

	return f;
}


void SafeRead( FILE *f, void *buffer, int count ) {
	if ( fread( buffer, 1, count, f ) != (size_t)count ) {
		Error( "File read failure" );
	}
}


void SafeWrite( FILE *f, void *buffer, int count ) {
	if ( fwrite( buffer, 1, count, f ) != (size_t)count ) {
		Error( "File write failure" );
	}
}


/*
==============
FileExists
==============
*/
qboolean    FileExists( char *filename ) {
	FILE    *f;

	f = fopen( filename, "r" );
	if ( !f ) {
		return false;
	}
	fclose( f );
	return true;
}

/*
==============
LoadFile
==============
*/
int    LoadFile( char *filename, void **bufferptr, int offset, int length ) {
	FILE    *f;
	void    *buffer;

	f = SafeOpenRead( filename );
	fseek( f, offset, SEEK_SET );
	if ( !length ) {
		length = Q_filelength( f );
	}
	buffer = GetMemory( length + 1 );
	( (char *)buffer )[length] = 0;
	SafeRead( f, buffer, length );
	fclose( f );

	*bufferptr = buffer;
	return length;
}


/*
==============
TryLoadFile

Allows failure
==============
*/
int    TryLoadFile( char *filename, void **bufferptr ) {
	FILE    *f;
	int length;
	void    *buffer;

	*bufferptr = NULL;

	f = fopen( filename, "rb" );
	if ( !f ) {
		return -1;
	}
	length = Q_filelength( f );
	buffer = GetMemory( length + 1 );
	( (char *)buffer )[length] = 0;
	SafeRead( f, buffer, length );
	fclose( f );

	*bufferptr = buffer;
	return length;
}


/*
==============
SaveFile
==============
*/
void    SaveFile( char *filename, void *buffer, int count ) {
	FILE    *f;

	f = SafeOpenWrite( filename );
	SafeWrite( f, buffer, count );
	fclose( f );
}



void DefaultExtension( char *path, char *extension ) {
	char    *src;
//
// if path doesnt have a .EXT, append extension
// (extension should include the .)
//
	src = path + strlen( path ) - 1;

	while ( *src != PATHSEPERATOR && src != path )
	{
		if ( *src == '.' ) {
			return;                 // it has an extension
		}
		src--;
	}

	strcat( path, extension );
}


void DefaultPath( char *path, char *basepath ) {
	char temp[128];

	if ( path[0] == PATHSEPERATOR ) {
		return;                   // absolute path location
	}
	strcpy( temp,path );
	strcpy( path,basepath );
	strcat( path,temp );
}


void    StripFilename( char *path ) {
	int length;

	length = strlen( path ) - 1;
	while ( length > 0 && path[length] != PATHSEPERATOR )
		length--;
	path[length] = 0;
}

void    StripExtension( char *path ) {
	int length;

	length = strlen( path ) - 1;
	while ( length > 0 && path[length] != '.' )
	{
		length--;
		if ( path[length] == '/' ) {
			return;     // no extension
		}
	}
	if ( length ) {
		path[length] = 0;
	}
}


/*
====================
Extract file parts
====================
*/
// FIXME: should include the slash, otherwise
// backing to an empty path will be wrong when appending a slash
void ExtractFilePath( char *path, char *dest ) {
	char    *src;

	src = path + strlen( path ) - 1;

//
// back up until a \ or the start
//
	while ( src != path && *( src - 1 ) != '\\' && *( src - 1 ) != '/' )
		src--;

	memcpy( dest, path, src - path );
	dest[src - path] = 0;
}

void ExtractFileBase( char *path, char *dest ) {
	char    *src;

	src = path + strlen( path ) - 1;

//
// back up until a \ or the start
//
	while ( src != path && *( src - 1 ) != '\\' && *( src - 1 ) != '/' )
		src--;

	while ( *src && *src != '.' )
	{
		*dest++ = *src++;
	}
	*dest = 0;
}

void ExtractFileExtension( char *path, char *dest ) {
	char    *src;

	src = path + strlen( path ) - 1;

//
// back up until a . or the start
//
	while ( src != path && *( src - 1 ) != '.' )
		src--;
	if ( src == path ) {
		*dest = 0;  // no extension
		return;
	}

	strcpy( dest,src );
}


/*
==============
ParseNum / ParseHex
==============
*/
int ParseHex( char *hex ) {
	char    *str;
	int num;

	num = 0;
	str = hex;

	while ( *str )
	{
		num <<= 4;
		if ( *str >= '0' && *str <= '9' ) {
			num += *str - '0';
		} else if ( *str >= 'a' && *str <= 'f' ) {
			num += 10 + *str - 'a';
		} else if ( *str >= 'A' && *str <= 'F' ) {
			num += 10 + *str - 'A';
		} else {
			Error( "Bad hex number: %s",hex );
		}
		str++;
	}

	return num;
}


int ParseNum( char *str ) {
	if ( str[0] == '$' ) {
		return ParseHex( str + 1 );
	}
	if ( str[0] == '0' && str[1] == 'x' ) {
		return ParseHex( str + 2 );
	}
	return atol( str );
}



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

					BYTE ORDER FUNCTIONS

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

#ifdef _SGI_SOURCE
#define __BIG_ENDIAN__
#endif

#ifdef __BIG_ENDIAN__

short   LittleShort( short l ) {
	byte b1,b2;

	b1 = l & 255;
	b2 = ( l >> 8 ) & 255;

	return ( b1 << 8 ) + b2;
}

short   BigShort( short l ) {
	return l;
}


int    LittleLong( int l ) {
	byte b1,b2,b3,b4;

	b1 = l & 255;
	b2 = ( l >> 8 ) & 255;
	b3 = ( l >> 16 ) & 255;
	b4 = ( l >> 24 ) & 255;

	return ( (int)b1 << 24 ) + ( (int)b2 << 16 ) + ( (int)b3 << 8 ) + b4;
}

int    BigLong( int l ) {
	return l;
}


float   LittleFloat( float l ) {
	union {byte b[4]; float f;} in, out;

	in.f = l;
	out.b[0] = in.b[3];
	out.b[1] = in.b[2];
	out.b[2] = in.b[1];
	out.b[3] = in.b[0];

	return out.f;
}

float   BigFloat( float l ) {
	return l;
}

#ifdef SIN
unsigned short   LittleUnsignedShort( unsigned short l ) {
	byte b1,b2;

	b1 = l & 255;
	b2 = ( l >> 8 ) & 255;

	return ( b1 << 8 ) + b2;
}

unsigned short   BigUnsignedShort( unsigned short l ) {
	return l;
}

unsigned    LittleUnsigned( unsigned l ) {
	byte b1,b2,b3,b4;

	b1 = l & 255;
	b2 = ( l >> 8 ) & 255;
	b3 = ( l >> 16 ) & 255;
	b4 = ( l >> 24 ) & 255;

	return ( (unsigned)b1 << 24 ) + ( (unsigned)b2 << 16 ) + ( (unsigned)b3 << 8 ) + b4;
}

unsigned    BigUnsigned( unsigned l ) {
	return l;
}
#endif


#else


short   BigShort( short l ) {
	byte b1,b2;

	b1 = l & 255;
	b2 = ( l >> 8 ) & 255;

	return ( b1 << 8 ) + b2;
}

short   LittleShort( short l ) {
	return l;
}


int    BigLong( int l ) {
	byte b1,b2,b3,b4;

	b1 = l & 255;
	b2 = ( l >> 8 ) & 255;
	b3 = ( l >> 16 ) & 255;
	b4 = ( l >> 24 ) & 255;

	return ( (int)b1 << 24 ) + ( (int)b2 << 16 ) + ( (int)b3 << 8 ) + b4;
}

int    LittleLong( int l ) {
	return l;
}

float   BigFloat( float l ) {
	union {byte b[4]; float f;} in, out;

	in.f = l;
	out.b[0] = in.b[3];
	out.b[1] = in.b[2];
	out.b[2] = in.b[1];
	out.b[3] = in.b[0];

	return out.f;
}

float   LittleFloat( float l ) {
	return l;
}

#ifdef SIN
unsigned short   BigUnsignedShort( unsigned short l ) {
	byte b1,b2;

	b1 = l & 255;
	b2 = ( l >> 8 ) & 255;

	return ( b1 << 8 ) + b2;
}

unsigned short   LittleUnsignedShort( unsigned short l ) {
	return l;
}


unsigned    BigUnsigned( unsigned l ) {
	byte b1,b2,b3,b4;

	b1 = l & 255;
	b2 = ( l >> 8 ) & 255;
	b3 = ( l >> 16 ) & 255;
	b4 = ( l >> 24 ) & 255;

	return ( (unsigned)b1 << 24 ) + ( (unsigned)b2 << 16 ) + ( (unsigned)b3 << 8 ) + b4;
}

unsigned    LittleUnsigned( unsigned l ) {
	return l;
}
#endif


#endif


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


// FIXME: byte swap?

// this is a 16 bit, non-reflected CRC using the polynomial 0x1021
// and the initial and final xor values shown below...  in other words, the
// CCITT standard CRC used by XMODEM

#define CRC_INIT_VALUE  0xffff
#define CRC_XOR_VALUE   0x0000

static unsigned short crctable[256] =
{
	0x0000, 0x1021, 0x2042, 0x3063, 0x4084, 0x50a5, 0x60c6, 0x70e7,
	0x8108, 0x9129, 0xa14a, 0xb16b, 0xc18c, 0xd1ad, 0xe1ce, 0xf1ef,
	0x1231, 0x0210, 0x3273, 0x2252, 0x52b5, 0x4294, 0x72f7, 0x62d6,
	0x9339, 0x8318, 0xb37b, 0xa35a, 0xd3bd, 0xc39c, 0xf3ff, 0xe3de,
	0x2462, 0x3443, 0x0420, 0x1401, 0x64e6, 0x74c7, 0x44a4, 0x5485,
	0xa56a, 0xb54b, 0x8528, 0x9509, 0xe5ee, 0xf5cf, 0xc5ac, 0xd58d,
	0x3653, 0x2672, 0x1611, 0x0630, 0x76d7, 0x66f6, 0x5695, 0x46b4,
	0xb75b, 0xa77a, 0x9719, 0x8738, 0xf7df, 0xe7fe, 0xd79d, 0xc7bc,
	0x48c4, 0x58e5, 0x6886, 0x78a7, 0x0840, 0x1861, 0x2802, 0x3823,
	0xc9cc, 0xd9ed, 0xe98e, 0xf9af, 0x8948, 0x9969, 0xa90a, 0xb92b,
	0x5af5, 0x4ad4, 0x7ab7, 0x6a96, 0x1a71, 0x0a50, 0x3a33, 0x2a12,
	0xdbfd, 0xcbdc, 0xfbbf, 0xeb9e, 0x9b79, 0x8b58, 0xbb3b, 0xab1a,
	0x6ca6, 0x7c87, 0x4ce4, 0x5cc5, 0x2c22, 0x3c03, 0x0c60, 0x1c41,
	0xedae, 0xfd8f, 0xcdec, 0xddcd, 0xad2a, 0xbd0b, 0x8d68, 0x9d49,
	0x7e97, 0x6eb6, 0x5ed5, 0x4ef4, 0x3e13, 0x2e32, 0x1e51, 0x0e70,
	0xff9f, 0xefbe, 0xdfdd, 0xcffc, 0xbf1b, 0xaf3a, 0x9f59, 0x8f78,
	0x9188, 0x81a9, 0xb1ca, 0xa1eb, 0xd10c, 0xc12d, 0xf14e, 0xe16f,
	0x1080, 0x00a1, 0x30c2, 0x20e3, 0x5004, 0x4025, 0x7046, 0x6067,
	0x83b9, 0x9398, 0xa3fb, 0xb3da, 0xc33d, 0xd31c, 0xe37f, 0xf35e,
	0x02b1, 0x1290, 0x22f3, 0x32d2, 0x4235, 0x5214, 0x6277, 0x7256,
	0xb5ea, 0xa5cb, 0x95a8, 0x8589, 0xf56e, 0xe54f, 0xd52c, 0xc50d,
	0x34e2, 0x24c3, 0x14a0, 0x0481, 0x7466, 0x6447, 0x5424, 0x4405,
	0xa7db, 0xb7fa, 0x8799, 0x97b8, 0xe75f, 0xf77e, 0xc71d, 0xd73c,
	0x26d3, 0x36f2, 0x0691, 0x16b0, 0x6657, 0x7676, 0x4615, 0x5634,
	0xd94c, 0xc96d, 0xf90e, 0xe92f, 0x99c8, 0x89e9, 0xb98a, 0xa9ab,
	0x5844, 0x4865, 0x7806, 0x6827, 0x18c0, 0x08e1, 0x3882, 0x28a3,
	0xcb7d, 0xdb5c, 0xeb3f, 0xfb1e, 0x8bf9, 0x9bd8, 0xabbb, 0xbb9a,
	0x4a75, 0x5a54, 0x6a37, 0x7a16, 0x0af1, 0x1ad0, 0x2ab3, 0x3a92,
	0xfd2e, 0xed0f, 0xdd6c, 0xcd4d, 0xbdaa, 0xad8b, 0x9de8, 0x8dc9,
	0x7c26, 0x6c07, 0x5c64, 0x4c45, 0x3ca2, 0x2c83, 0x1ce0, 0x0cc1,
	0xef1f, 0xff3e, 0xcf5d, 0xdf7c, 0xaf9b, 0xbfba, 0x8fd9, 0x9ff8,
	0x6e17, 0x7e36, 0x4e55, 0x5e74, 0x2e93, 0x3eb2, 0x0ed1, 0x1ef0
};

void CRC_Init( unsigned short *crcvalue ) {
	*crcvalue = CRC_INIT_VALUE;
}

void CRC_ProcessByte( unsigned short *crcvalue, byte data ) {
	*crcvalue = ( *crcvalue << 8 ) ^ crctable[( *crcvalue >> 8 ) ^ data];
}

unsigned short CRC_Value( unsigned short crcvalue ) {
	return crcvalue ^ CRC_XOR_VALUE;
}
//=============================================================================

/*
============
CreatePath
============
*/
void    CreatePath( char *path ) {
	char    *ofs, c;

	if ( path[1] == ':' ) {
		path += 2;
	}

	for ( ofs = path + 1 ; *ofs ; ofs++ )
	{
		c = *ofs;
		if ( c == '/' || c == '\\' ) { // create the directory
			*ofs = 0;
			Q_mkdir( path );
			*ofs = c;
		}
	}
}


/*
============
QCopyFile

  Used to archive source files
============
*/
void QCopyFile( char *from, char *to ) {
	void    *buffer;
	int length;

	length = LoadFile( from, &buffer, 0, 0 );
	CreatePath( to );
	SaveFile( to, buffer, length );
	FreeMemory( buffer );
}

void FS_FreeFile( void *buf ) {
	FreeMemory( buf );
} //end of the function FS_FreeFile

int FS_ReadFileAndCache( const char *qpath, void **buffer ) {
	return LoadFile( (char *) qpath, buffer, 0, 0 );
} //end of the function FS_ReadFileAndCache

int FS_FOpenFileRead( const char *filename, FILE **file, qboolean uniqueFILE ) {
	*file = fopen( filename, "rb" );
	return ( *file != NULL );
} //end of the function FS_FOpenFileRead
