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

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

This file is part of the Return to Castle Wolfenstein multiplayer GPL Source Code (“RTCW MP Source Code”).  

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

In addition, the RTCW MP 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 MP 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.

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

//===========================================================================
//
// Name:			l_qfiles.h
// Function:		-
// Programmer:		Mr Elusive
// Last update:		1999-11-29
// Tab Size:		3
//===========================================================================

#if defined( WIN32 ) | defined( _WIN32 )
#include <windows.h>
#include <sys/types.h>
#include <sys/stat.h>
#else
#include <glob.h>
#include <sys/stat.h>
#include <unistd.h>
#endif

#include "qbsp.h"

//file extensions with their type
typedef struct qfile_exttype_s
{
	char *extension;
	int type;
} qfile_exttyp_t;

qfile_exttyp_t quakefiletypes[] =
{
	{QFILEEXT_UNKNOWN, QFILETYPE_UNKNOWN},
	{QFILEEXT_PAK, QFILETYPE_PAK},
	{QFILEEXT_PK3, QFILETYPE_PK3},
	{QFILEEXT_SIN, QFILETYPE_PAK},
	{QFILEEXT_BSP, QFILETYPE_BSP},
	{QFILEEXT_MAP, QFILETYPE_MAP},
	{QFILEEXT_MDL, QFILETYPE_MDL},
	{QFILEEXT_MD2, QFILETYPE_MD2},
	{QFILEEXT_MD3, QFILETYPE_MD3},
	{QFILEEXT_WAL, QFILETYPE_WAL},
	{QFILEEXT_WAV, QFILETYPE_WAV},
	{QFILEEXT_AAS, QFILETYPE_AAS},
	{NULL, 0}
};

//===========================================================================
//
// Parameter:			-
// Returns:				-
// Changes Globals:		-
//===========================================================================
int QuakeFileExtensionType( char *extension ) {
	int i;

	for ( i = 0; quakefiletypes[i].extension; i++ )
	{
		if ( !stricmp( extension, quakefiletypes[i].extension ) ) {
			return quakefiletypes[i].type;
		} //end if
	} //end for
	return QFILETYPE_UNKNOWN;
} //end of the function QuakeFileExtensionType
//===========================================================================
//
// Parameter:			-
// Returns:				-
// Changes Globals:		-
//===========================================================================
char *QuakeFileTypeExtension( int type ) {
	int i;

	for ( i = 0; quakefiletypes[i].extension; i++ )
	{
		if ( quakefiletypes[i].type == type ) {
			return quakefiletypes[i].extension;
		} //end if
	} //end for
	return QFILEEXT_UNKNOWN;
} //end of the function QuakeFileExtension
//===========================================================================
//
// Parameter:			-
// Returns:				-
// Changes Globals:		-
//===========================================================================
int QuakeFileType( char *filename ) {
	char ext[_MAX_PATH] = ".";

	ExtractFileExtension( filename, ext + 1 );
	return QuakeFileExtensionType( ext );
} //end of the function QuakeFileTypeFromFileName
//===========================================================================
//
// Parameter:				-
// Returns:					-
// Changes Globals:		-
//===========================================================================
char *StringContains( char *str1, char *str2, int casesensitive ) {
	int len, i, j;

	len = strlen( str1 ) - strlen( str2 );
	for ( i = 0; i <= len; i++, str1++ )
	{
		for ( j = 0; str2[j]; j++ )
		{
			if ( casesensitive ) {
				if ( str1[j] != str2[j] ) {
					break;
				}
			} //end if
			else
			{
				if ( toupper( str1[j] ) != toupper( str2[j] ) ) {
					break;
				}
			} //end else
		} //end for
		if ( !str2[j] ) {
			return str1;
		}
	} //end for
	return NULL;
} //end of the function StringContains
//===========================================================================
//
// Parameter:			-
// Returns:				-
// Changes Globals:		-
//===========================================================================
int FileFilter( char *filter, char *filename, int casesensitive ) {
	char buf[1024];
	char *ptr;
	int i, found;

	while ( *filter )
	{
		if ( *filter == '*' ) {
			filter++;
			for ( i = 0; *filter; i++ )
			{
				if ( *filter == '*' || *filter == '?' ) {
					break;
				}
				buf[i] = *filter;
				filter++;
			} //end for
			buf[i] = '\0';
			if ( strlen( buf ) ) {
				ptr = StringContains( filename, buf, casesensitive );
				if ( !ptr ) {
					return false;
				}
				filename = ptr + strlen( buf );
			} //end if
		} //end if
		else if ( *filter == '?' ) {
			filter++;
			filename++;
		} //end else if
		else if ( *filter == '[' && *( filter + 1 ) == '[' ) {
			filter++;
		} //end if
		else if ( *filter == '[' ) {
			filter++;
			found = false;
			while ( *filter && !found )
			{
				if ( *filter == ']' && *( filter + 1 ) != ']' ) {
					break;
				}
				if ( *( filter + 1 ) == '-' && *( filter + 2 ) && ( *( filter + 2 ) != ']' || *( filter + 3 ) == ']' ) ) {
					if ( casesensitive ) {
						if ( *filename >= *filter && *filename <= *( filter + 2 ) ) {
							found = true;
						}
					} //end if
					else
					{
						if ( toupper( *filename ) >= toupper( *filter ) &&
							 toupper( *filename ) <= toupper( *( filter + 2 ) ) ) {
							found = true;
						}
					} //end else
					filter += 3;
				} //end if
				else
				{
					if ( casesensitive ) {
						if ( *filter == *filename ) {
							found = true;
						}
					} //end if
					else
					{
						if ( toupper( *filter ) == toupper( *filename ) ) {
							found = true;
						}
					} //end else
					filter++;
				} //end else
			} //end while
			if ( !found ) {
				return false;
			}
			while ( *filter )
			{
				if ( *filter == ']' && *( filter + 1 ) != ']' ) {
					break;
				}
				filter++;
			} //end while
			filter++;
			filename++;
		} //end else if
		else
		{
			if ( casesensitive ) {
				if ( *filter != *filename ) {
					return false;
				}
			} //end if
			else
			{
				if ( toupper( *filter ) != toupper( *filename ) ) {
					return false;
				}
			} //end else
			filter++;
			filename++;
		} //end else
	} //end while
	return true;
} //end of the function FileFilter
//===========================================================================
//
// Parameter:			-
// Returns:				-
// Changes Globals:		-
//===========================================================================
quakefile_t *FindQuakeFilesInZip( char *zipfile, char *filter ) {
	unzFile uf;
	int err;
	unz_global_info gi;
	char filename_inzip[MAX_PATH];
	unz_file_info file_info;
	int i;
	quakefile_t     *qfiles, *lastqf, *qf;

	uf = unzOpen( zipfile );
	err = unzGetGlobalInfo( uf, &gi );

	if ( err != UNZ_OK ) {
		return NULL;
	}

	unzGoToFirstFile( uf );

	qfiles = NULL;
	lastqf = NULL;
	for ( i = 0; i < gi.number_entry; i++ )
	{
		err = unzGetCurrentFileInfo( uf, &file_info, filename_inzip, sizeof( filename_inzip ), NULL,0,NULL,0 );
		if ( err != UNZ_OK ) {
			break;
		}

		ConvertPath( filename_inzip );
		if ( FileFilter( filter, filename_inzip, false ) ) {
			qf = malloc( sizeof( quakefile_t ) );
			if ( !qf ) {
				Error( "out of memory" );
			}
			memset( qf, 0, sizeof( quakefile_t ) );
			strcpy( qf->pakfile, zipfile );
			strcpy( qf->filename, zipfile );
			strcpy( qf->origname, filename_inzip );
			qf->zipfile = true;
			//memcpy( &buildBuffer[i].zipfileinfo, (unz_s*)uf, sizeof(unz_s));
			memcpy( &qf->zipinfo, (unz_s*)uf, sizeof( unz_s ) );
			qf->offset = 0;
			qf->length = file_info.uncompressed_size;
			qf->type = QuakeFileType( filename_inzip );
			//add the file ot the list
			qf->next = NULL;
			if ( lastqf ) {
				lastqf->next = qf;
			} else { qfiles = qf;}
			lastqf = qf;
		} //end if
		unzGoToNextFile( uf );
	} //end for

	unzClose( uf );

	return qfiles;
} //end of the function FindQuakeFilesInZip
//===========================================================================
//
// Parameter:			-
// Returns:				-
// Changes Globals:		-
//===========================================================================
quakefile_t *FindQuakeFilesInPak( char *pakfile, char *filter ) {
	FILE *fp;
	dpackheader_t packheader;
	dsinpackfile_t *packfiles;
	dpackfile_t *idpackfiles;
	quakefile_t *qfiles, *lastqf, *qf;
	int numpackdirs, i;

	qfiles = NULL;
	lastqf = NULL;
	//open the pak file
	fp = fopen( pakfile, "rb" );
	if ( !fp ) {
		Warning( "can't open pak file %s", pakfile );
		return NULL;
	} //end if
	  //read pak header, check for valid pak id and seek to the dir entries
	if ( ( fread( &packheader, 1, sizeof( dpackheader_t ), fp ) != sizeof( dpackheader_t ) )
		 || ( packheader.ident != IDPAKHEADER && packheader.ident != SINPAKHEADER )
		 ||  ( fseek( fp, LittleLong( packheader.dirofs ), SEEK_SET ) )
		 ) {
		fclose( fp );
		Warning( "invalid pak file %s", pakfile );
		return NULL;
	} //end if
	  //if it is a pak file from id software
	if ( packheader.ident == IDPAKHEADER ) {
		//number of dir entries in the pak file
		numpackdirs = LittleLong( packheader.dirlen ) / sizeof( dpackfile_t );
		idpackfiles = (dpackfile_t *) malloc( numpackdirs * sizeof( dpackfile_t ) );
		if ( !idpackfiles ) {
			Error( "out of memory" );
		}
		//read the dir entry
		if ( fread( idpackfiles, sizeof( dpackfile_t ), numpackdirs, fp ) != numpackdirs ) {
			fclose( fp );
			free( idpackfiles );
			Warning( "can't read the Quake pak file dir entries from %s", pakfile );
			return NULL;
		} //end if
		fclose( fp );
		//convert to sin pack files
		packfiles = (dsinpackfile_t *) malloc( numpackdirs * sizeof( dsinpackfile_t ) );
		if ( !packfiles ) {
			Error( "out of memory" );
		}
		for ( i = 0; i < numpackdirs; i++ )
		{
			strcpy( packfiles[i].name, idpackfiles[i].name );
			packfiles[i].filepos = LittleLong( idpackfiles[i].filepos );
			packfiles[i].filelen = LittleLong( idpackfiles[i].filelen );
		} //end for
		free( idpackfiles );
	} //end if
	else //its a Sin pack file
	{
		//number of dir entries in the pak file
		numpackdirs = LittleLong( packheader.dirlen ) / sizeof( dsinpackfile_t );
		packfiles = (dsinpackfile_t *) malloc( numpackdirs * sizeof( dsinpackfile_t ) );
		if ( !packfiles ) {
			Error( "out of memory" );
		}
		//read the dir entry
		if ( fread( packfiles, sizeof( dsinpackfile_t ), numpackdirs, fp ) != numpackdirs ) {
			fclose( fp );
			free( packfiles );
			Warning( "can't read the Sin pak file dir entries from %s", pakfile );
			return NULL;
		} //end if
		fclose( fp );
		for ( i = 0; i < numpackdirs; i++ )
		{
			packfiles[i].filepos = LittleLong( packfiles[i].filepos );
			packfiles[i].filelen = LittleLong( packfiles[i].filelen );
		} //end for
	} //end else
	  //
	for ( i = 0; i < numpackdirs; i++ )
	{
		ConvertPath( packfiles[i].name );
		if ( FileFilter( filter, packfiles[i].name, false ) ) {
			qf = malloc( sizeof( quakefile_t ) );
			if ( !qf ) {
				Error( "out of memory" );
			}
			memset( qf, 0, sizeof( quakefile_t ) );
			strcpy( qf->pakfile, pakfile );
			strcpy( qf->filename, pakfile );
			strcpy( qf->origname, packfiles[i].name );
			qf->zipfile = false;
			qf->offset = packfiles[i].filepos;
			qf->length = packfiles[i].filelen;
			qf->type = QuakeFileType( packfiles[i].name );
			//add the file ot the list
			qf->next = NULL;
			if ( lastqf ) {
				lastqf->next = qf;
			} else { qfiles = qf;}
			lastqf = qf;
		} //end if
	} //end for
	free( packfiles );
	return qfiles;
} //end of the function FindQuakeFilesInPak
//===========================================================================
//
// Parameter:			-
// Returns:				-
// Changes Globals:		-
//===========================================================================
quakefile_t *FindQuakeFilesWithPakFilter( char *pakfilter, char *filter ) {
#if defined( WIN32 ) | defined( _WIN32 )
	WIN32_FIND_DATA filedata;
	HWND handle;
	struct _stat statbuf;
#else
	glob_t globbuf;
	struct stat statbuf;
	int j;
#endif
	quakefile_t *qfiles, *lastqf, *qf;
	char pakfile[_MAX_PATH], filename[_MAX_PATH], *str;
	int done;

	qfiles = NULL;
	lastqf = NULL;
	if ( pakfilter && strlen( pakfilter ) ) {
#if defined( WIN32 ) | defined( _WIN32 )
		handle = FindFirstFile( pakfilter, &filedata );
		done = ( handle == INVALID_HANDLE_VALUE );
		while ( !done )
		{
			_splitpath( pakfilter, pakfile, NULL, NULL, NULL );
			_splitpath( pakfilter, NULL, &pakfile[strlen( pakfile )], NULL, NULL );
			AppendPathSeperator( pakfile, _MAX_PATH );
			strcat( pakfile, filedata.cFileName );
			_stat( pakfile, &statbuf );
#else
		glob( pakfilter, 0, NULL, &globbuf );
		for ( j = 0; j < globbuf.gl_pathc; j++ )
		{
			strcpy( pakfile, globbuf.gl_pathv[j] );
			stat( pakfile, &statbuf );
#endif
			//if the file with .pak or .pk3 is a folder
			if ( statbuf.st_mode & S_IFDIR ) {
				strcpy( filename, pakfilter );
				AppendPathSeperator( filename, _MAX_PATH );
				strcat( filename, filter );
				qf = FindQuakeFilesWithPakFilter( NULL, filename );
				if ( lastqf ) {
					lastqf->next = qf;
				} else { qfiles = qf;}
				lastqf = qf;
				while ( lastqf->next ) lastqf = lastqf->next;
			} //end if
			else
			{
#if defined( WIN32 ) | defined( _WIN32 )
				str = StringContains( pakfile, ".pk3", false );
#else
				str = StringContains( pakfile, ".pk3", true );
#endif
				if ( str && str == pakfile + strlen( pakfile ) - strlen( ".pk3" ) ) {
					qf = FindQuakeFilesInZip( pakfile, filter );
				} //end if
				else
				{
					qf = FindQuakeFilesInPak( pakfile, filter );
				} //end else
				  //
				if ( qf ) {
					if ( lastqf ) {
						lastqf->next = qf;
					} else { qfiles = qf;}
					lastqf = qf;
					while ( lastqf->next ) lastqf = lastqf->next;
				} //end if
			} //end else
			  //
#if defined( WIN32 ) | defined( _WIN32 )
			//find the next file
			done = !FindNextFile( handle, &filedata );
		} //end while
#else
		} //end for
		globfree( &globbuf );
#endif
	} //end if
	else
	{
#if defined( WIN32 ) | defined( _WIN32 )
		handle = FindFirstFile( filter, &filedata );
		done = ( handle == INVALID_HANDLE_VALUE );
		while ( !done )
		{
			_splitpath( filter, filename, NULL, NULL, NULL );
			_splitpath( filter, NULL, &filename[strlen( filename )], NULL, NULL );
			AppendPathSeperator( filename, _MAX_PATH );
			strcat( filename, filedata.cFileName );
#else
		glob( filter, 0, NULL, &globbuf );
		for ( j = 0; j < globbuf.gl_pathc; j++ )
		{
			strcpy( filename, globbuf.gl_pathv[j] );
#endif
			//
			qf = malloc( sizeof( quakefile_t ) );
			if ( !qf ) {
				Error( "out of memory" );
			}
			memset( qf, 0, sizeof( quakefile_t ) );
			strcpy( qf->pakfile, "" );
			strcpy( qf->filename, filename );
			strcpy( qf->origname, filename );
			qf->offset = 0;
			qf->length = 0;
			qf->type = QuakeFileType( filename );
			//add the file ot the list
			qf->next = NULL;
			if ( lastqf ) {
				lastqf->next = qf;
			} else { qfiles = qf;}
			lastqf = qf;
#if defined( WIN32 ) | defined( _WIN32 )
			//find the next file
			done = !FindNextFile( handle, &filedata );
		} //end while
#else
		} //end for
		globfree( &globbuf );
#endif
	} //end else
	return qfiles;
} //end of the function FindQuakeFilesWithPakFilter
//===========================================================================
//
// Parameter:			-
// Returns:				-
// Changes Globals:		-
//===========================================================================
quakefile_t *FindQuakeFiles( char *filter ) {
	char *str;
	char newfilter[_MAX_PATH];
	char pakfilter[_MAX_PATH];
	char filefilter[_MAX_PATH];

	strcpy( newfilter, filter );
	ConvertPath( newfilter );
	strcpy( pakfilter, newfilter );

	str = StringContains( pakfilter, ".pak", false );
	if ( !str ) {
		str = StringContains( pakfilter, ".pk3", false );
	}

	if ( str ) {
		str += strlen( ".pak" );
		if ( *str ) {
			*str++ = '\0';
			while ( *str == '\\' || *str == '/' ) str++;
			strcpy( filefilter, str );
			return FindQuakeFilesWithPakFilter( pakfilter, filefilter );
		} //end if
	} //end else
	return FindQuakeFilesWithPakFilter( NULL, newfilter );
} //end of the function FindQuakeFiles
//===========================================================================
//
// Parameter:			-
// Returns:				-
// Changes Globals:		-
//===========================================================================
int LoadQuakeFile( quakefile_t *qf, void **bufferptr ) {
	FILE *fp;
	void *buffer;
	int length;
	unzFile zf;

	if ( qf->zipfile ) {
		//open the zip file
		zf = unzOpen( qf->pakfile );
		//set the file pointer
		qf->zipinfo.file = ( (unz_s *) zf )->file;
		//open the Quake file in the zip file
		unzOpenCurrentFile( &qf->zipinfo );
		//allocate memory for the buffer
		length = qf->length;
		buffer = GetMemory( length + 1 );
		//read the Quake file from the zip file
		length = unzReadCurrentFile( &qf->zipinfo, buffer, length );
		//close the Quake file in the zip file
		unzCloseCurrentFile( &qf->zipinfo );
		//close the zip file
		unzClose( zf );

		*bufferptr = buffer;
		return length;
	} //end if
	else
	{
		fp = SafeOpenRead( qf->filename );
		if ( qf->offset ) {
			fseek( fp, qf->offset, SEEK_SET );
		}
		length = qf->length;
		if ( !length ) {
			length = Q_filelength( fp );
		}
		buffer = GetMemory( length + 1 );
		( (char *)buffer )[length] = 0;
		SafeRead( fp, buffer, length );
		fclose( fp );

		*bufferptr = buffer;
		return length;
	} //end else
} //end of the function LoadQuakeFile
//===========================================================================
//
// Parameter:			-
// Returns:				-
// Changes Globals:		-
//===========================================================================
int ReadQuakeFile( quakefile_t *qf, void *buffer, int offset, int length ) {
	FILE *fp;
	int read;
	unzFile zf;
	char tmpbuf[1024];

	if ( qf->zipfile ) {
		//open the zip file
		zf = unzOpen( qf->pakfile );
		//set the file pointer
		qf->zipinfo.file = ( (unz_s *) zf )->file;
		//open the Quake file in the zip file
		unzOpenCurrentFile( &qf->zipinfo );
		//
		while ( offset > 0 )
		{
			read = offset;
			if ( read > sizeof( tmpbuf ) ) {
				read = sizeof( tmpbuf );
			}
			unzReadCurrentFile( &qf->zipinfo, tmpbuf, read );
			offset -= read;
		} //end while
		  //read the Quake file from the zip file
		length = unzReadCurrentFile( &qf->zipinfo, buffer, length );
		//close the Quake file in the zip file
		unzCloseCurrentFile( &qf->zipinfo );
		//close the zip file
		unzClose( zf );

		return length;
	} //end if
	else
	{
		fp = SafeOpenRead( qf->filename );
		if ( qf->offset ) {
			fseek( fp, qf->offset, SEEK_SET );
		}
		if ( offset ) {
			fseek( fp, offset, SEEK_CUR );
		}
		SafeRead( fp, buffer, length );
		fclose( fp );

		return length;
	} //end else
} //end of the function ReadQuakeFile