// cmdlib.c

#include "cmdlib.h"
#include <sys/types.h>
#include <sys/stat.h>

#ifdef WIN32
#include <windows.h>
#include <direct.h>
#include <assert.h>
#endif

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

#define BASEDIRNAME   "hm"              // assumed to have a 2 or 3 following
#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 WIN_ERROR
#include <windows.h>
/*
=================
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( NULL, text2, "Error", 0 /* MB_OK */ );

	exit( 1 );
}

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

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

	printf( "\n************ ERROR ************\n" );

	va_start( argptr, error );
	vprintf( error, argptr );
	va_end( argptr );
	printf( "\n" );

	assert( 0 );
	exit( 1 );
}

#endif

// only printf if in verbose mode
qboolean verbose = qfalse;
void qprintf( const char *format, ... )
{
	va_list argptr;

	if( !verbose )
		return;

	va_start( argptr, format );
	vprintf( format, argptr );
	va_end( argptr );
}

/*

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];
char writedir[1024];

void SetQdirFromPath( const char *path )
{
	char       temp[1024];
	const char *c;
	int        len;
	int        arg_location;
	int        gamedir_length;
	int        current_char;
	int        qdir_length;

	// See if the game directory was specified at the command line

	arg_location = CheckParm( "-gamedir" );

	if( arg_location != 0 )
	{
		// Get the game directory

		strcpy( gamedir, myargv[arg_location + 1] );

		gamedir_length = strlen( gamedir );

		// Make sure all slashes are forward slashes

		for( current_char = 0; current_char < strlen( gamedir ); current_char++ )
		{
			if( gamedir[current_char] == '\\' )
				gamedir[current_char] = '/';
		}

		// Make sure there is a slash at the end of the directory name

		if( gamedir[gamedir_length - 1] != '/' )
		{
			gamedir[gamedir_length] = '/';
			gamedir[gamedir_length + 1] = 0;
		}

		// Get the quake directory (directory above gamedir)

		current_char = strlen( gamedir ) - 2;

		while( gamedir[current_char] != '/' )
		{
			current_char--;
		}

		qdir_length = current_char + 1;

		strncpy( qdir, gamedir, qdir_length );

		strcpy( writedir, gamedir );

		return;
	}

	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-- )
	{
		int i;

		if( !Q_strncasecmp( c, BASEDIRNAME, len ))
		{
			strncpy( qdir, path, c + len + 1 - path ); // was 2 for Quake 3
			qprintf( "qdir: %s\n", qdir );
			for( i = 0; i < strlen( qdir ); i++ )
			{
				if( qdir[i] == '\\' )
					qdir[i] = '/';
			}

			c += len + 2;
			while( *c )
			{
				if( *c == '/' || *c == '\\' )
				{
					strncpy( gamedir, path, c + 1 - path );

					for( i = 0; i < strlen( gamedir ); i++ )
					{
						if( gamedir[i] == '\\' )
							gamedir[i] = '/';
					}

					qprintf( "gamedir: %s\n", gamedir );

					if( !writedir[0] )
						strcpy( writedir, gamedir );
					else if( writedir[strlen( writedir ) - 1] != '/' )
					{
						writedir[strlen( writedir )] = '/';
						writedir[strlen( writedir ) + 1] = 0;
					}

					return;
				}
				c++;
			}
			Error( "No gamedir in %s", path );
			return;
		}
	}
	Error( "SetQdirFromPath: no '%s' in %s", BASEDIRNAME, path );
}

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

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

char *ExpandPathAndArchive( const 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( const char *s )
{
	char *b;
	b = malloc( strlen( s ) + 1 );
	strcpy( b, s );
	return b;
}

/*
================
I_MilliSeconds
================
*/
double I_MilliSeconds( void )
{
#ifdef WIN32
	double time;

	time = timeGetTime() / 1000.0f;
	return time;
#else
	time_t t;

	time( &t );

	return t * 1000.0f;
#endif
}

/*
================
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 )
{
	int i = 0;

#ifdef WIN32
	_getcwd( out, 256 );
	strcat( out, "\\" );
#else
	getwd( out );
	strcat( out, "/" );
#endif

	while( out[i] != 0 )
	{
		if( out[i] == '\\' )
			out[i] = '/';
		i++;
	}
}

void Q_mkdir( const 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( const 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 = qtrue;
			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( const char *s1, const 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_stricmp( const char *s1, const char *s2 )
{
	return Q_strncasecmp( s1, s2, 99999 );
}

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( const char *check )
{
	int i;

	for( i = 1; i < myargc; i++ )
	{
		if( !Q_stricmp( 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( const char *filename )
{
	FILE *f;

	f = fopen( filename, "wb" );

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

	return f;
}

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

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

	f = fopen( filename, "r" );
	if( !f )
		return qfalse;
	fclose( f );
	return qtrue;
}

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

	f = SafeOpenRead( filename );
	length = Q_filelength( f );
	buffer = malloc( length + 1 );
	((char *)buffer )[length] = 0;
	SafeRead( f, buffer, length );
	fclose( f );

	*bufferptr = buffer;
	return length;
}

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

Allows failure
==============
*/
int TryLoadFile( const 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 = malloc( length + 1 );
	((char *)buffer )[length] = 0;
	SafeRead( f, buffer, length );
	fclose( f );

	*bufferptr = buffer;
	return length;
}

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

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

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

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

	strcat( path, extension );
}

void DefaultPath( char *path, const 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( const char *path, char *dest )
{
	const 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( const char *path, char *dest )
{
	const char *src;

	src = path + strlen( path ) - 1;

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

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

void ExtractFileExtension( const char *path, char *dest )
{
	const 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 );
}

void ExtractFileName( const char *path, char *dest )
{
	const char *src;

	src = path + strlen( path ) - 1;

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

	while( *src )
	{
		*dest++ = *src++;
	}
	*dest = 0;
}

/*
==============
ParseNum / ParseHex
==============
*/
int ParseHex( const char *hex )
{
	const 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( const 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;
}

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;
}

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;
}

#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;
}

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;
}

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;
}

#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( const char *path )
{
	const char *ofs;
	char       c;
	char       dir[1024];

#ifdef _WIN32
	int        olddrive = -1;

	if( path[1] == ':' )
	{
		olddrive = _getdrive();
		_chdrive( toupper( path[0] ) - 'A' + 1 );
	}
#endif

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

	for( ofs = path + 1; *ofs; ofs++ )
	{
		c = *ofs;
		if( c == '/' || c == '\\' )
		{ // create the directory
			memcpy( dir, path, ofs - path );
			dir[ ofs - path ] = 0;
			Q_mkdir( dir );
		}
	}

#ifdef _WIN32
	if( olddrive != -1 )
	{
		_chdrive( olddrive );
	}
#endif
}

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

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

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

/*
=================
ProcessDirectory
=================
*/
void ProcessDirectory( char *dir, char *name, char *ext, processfile_t func, qboolean recurse )
{
	char               savedir[256];
	char               subdir[128];
	char               subname[256];
	char               subsubname[256];
	char               extension[32];
	long               filehandle;
	struct _finddata_t files;
	static int         recurselevel = 0;

	if( strlen( name ) > 0 )
	{
		strcpy( subname, name );
		subname[6] = 0;
		strcat( subname, "_" );
	}
	else
	{
		memset( subname, 0, sizeof( subname ));
	}

	// save off directory
	_getcwd( savedir, 1024 );

	// change to this directory
	if( _chdir( dir ) != 0 )
		Error( "Could not change to %s\n", dir );

	filehandle = _findfirst( "*.*", &files );
	if( filehandle != -1L )
	{
		do
		{
			if( files.attrib & _A_SUBDIR )
			{
				if( recurse )
				{
					if( files.name[0] != '.' )
					{
						strcpy( subdir, dir );
						if( subdir[strlen( subdir ) - 1] != '\\' )
							strcat( subdir, "\\" );
						strcat( subdir, files.name );
						strcpy( subsubname, subname );
						strcat( subsubname, files.name );
						recurselevel++;
						ProcessDirectory( subdir, subsubname, ext, func, recurse );
						recurselevel--;
					}
				}
			}
			else
			{
				ExtractFileExtension( files.name, extension );
				if( strcmpi( extension, ext ) == 0 )
				{
					func( files.name, subname );
				}
			}
		}
		while( _findnext( filehandle, &files ) == 0 );
	}
	_findclose( filehandle );
	// change to the saved directory
	_chdir( savedir );
}

/*
=================
ProcessWildDirectory
=================
*/
void ProcessWildDirectory( char *dir, char *name, char *wild, processfile_t func, qboolean recurse )
{
	char               savedir[256];
	char               subdir[128];
	char               subname[256];
	char               subsubname[256];
	long               filehandle;
	struct _finddata_t files;
	static int         recurselevel = 0;

	if( strlen( name ) > 0 )
	{
		strcpy( subname, name );
		if( subname[strlen( subname ) - 1] != '/' )
			strcat( subname, "/" );
	}
	else
	{
		memset( subname, 0, sizeof( subname ));
	}

	// save off directory
	_getcwd( savedir, 1024 );

	// change to this directory
	if( _chdir( dir ) != 0 )
	{
		printf( "Could not change to %s\n", dir );
		return;
	}

	if( recurse )
	{
		filehandle = _findfirst( "*.*", &files );
		if( filehandle != -1L )
		{
			do
			{
				if( files.attrib & _A_SUBDIR )
				{
					if( recurse )
					{
						if( files.name[0] != '.' )
						{
							subdir[ 0 ] = 0;
							strcat( subdir, files.name );
							strcpy( subsubname, subname );
							strcat( subsubname, files.name );
							recurselevel++;
							ProcessWildDirectory( subdir, subsubname, wild, func, recurse );
							recurselevel--;
						}
					}
				}
			}
			while( _findnext( filehandle, &files ) == 0 );
		}
		_findclose( filehandle );
	}
	filehandle = _findfirst( wild, &files );
	if( filehandle != -1L )
	{
		do
		{
			if( !( files.attrib & _A_SUBDIR ) && ( files.name[0] != '.' ))
			{
				func( files.name, subname );
			}
		}
		while( _findnext( filehandle, &files ) == 0 );
	}
	_findclose( filehandle );
	// change to the saved directory
	_chdir( savedir );
}

/*
============
DeSlashify
============
*/
void DeSlashify( char *in )
{
	while( *in )
	{
		if(( *in ) == '\\' )
		{
			*in = '/';
		}
		in++;
	}
}

/*
============
WinSlashify
============
*/
void WinSlashify( char *in )
{
	while( *in )
	{
		if(( *in ) == '/' )
		{
			*in = '\\';
		}
		in++;
	}
}
