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quakeforge-old/common/quakefs.c

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/*
quakefs.c - virtual filesystem functions
Copyright (C) 1996-1997 Id Software, Inc.
Portions Copyright (C) 1999,2000 Nelson Rush.
Copyright (C) 1999,2000 contributors of the QuakeForge project
Please see the file "AUTHORS" for a list of contributors
This program 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.
This program 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 this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#include "config.h"
#include <ctype.h>
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
#include <fcntl.h>
#include <qtypes.h>
#include <quakefs.h>
#include <sys.h>
#include <console.h>
#include <common_quakedef.h>
#include <zone.h>
#include <common.h>
#include <draw.h>
#include <dirent.h>
#include <fnmatch.h>
#ifdef WIN32
#include <io.h>
#endif
/*
All of Quake's data access is through a hierchal file system, but the contents of the file system can be transparently merged from several sources.
The "base directory" is the path to the directory holding the quake.exe and all game directories. The sys_* files pass this to host_init in quakeparms_t->basedir. This can be overridden with the "-basedir" command line parm to allow code debugging in a different directory. The base directory is
only used during filesystem initialization.
The "game directory" is the first tree on the search path and directory that all generated files (savegames, screenshots, demos, config files) will be saved to. This can be overridden with the "-game" command line parameter. The game directory can never be changed while quake is executing. This is a precacution against having a malicious server instruct clients to write files over areas they shouldn't.
The "cache directory" is only used during development to save network bandwidth, especially over ISDN / T1 lines. If there is a cache directory
specified, when a file is found by the normal search path, it will be mirrored
into the cache directory, then opened there.
*/
/*
=============================================================================
QUAKE FILESYSTEM
=============================================================================
*/
char gamedirfile[MAX_OSPATH];
#ifdef GENERATIONS
#include <unzip.h>
typedef unsigned char byte_t;
#ifndef _AIX
typedef unsigned int uint_t;
typedef unsigned short ushort_t;
#endif
#endif
int com_filesize;
/*
In-memory pack file structs
*/
typedef struct
{
char name[MAX_QPATH];
int filepos, filelen;
} packfile_t;
typedef struct pack_s
{
char filename[MAX_OSPATH];
QFile *handle;
int numfiles;
packfile_t *files;
} pack_t;
/*
Structs for pack files on disk
*/
typedef struct
{
char name[56];
int filepos, filelen;
} dpackfile_t;
typedef struct
{
char id[4];
int dirofs;
int dirlen;
} dpackheader_t;
#define MAX_FILES_IN_PACK 2048
char com_gamedir[MAX_OSPATH];
char com_basedir[MAX_OSPATH];
typedef struct searchpath_s
{
char filename[MAX_OSPATH];
pack_t *pack; // only one of filename / pack will be used
struct searchpath_s *next;
} searchpath_t;
searchpath_t *com_searchpaths;
searchpath_t *com_base_searchpaths; // without gamedirs
/*
================
COM_filelength
================
*/
int COM_filelength (QFile *f)
{
int pos;
int end;
pos = Qtell (f);
Qseek (f, 0, SEEK_END);
end = Qtell (f);
Qseek (f, pos, SEEK_SET);
return end;
}
int COM_FileOpenRead (char *path, QFile **hndl)
{
QFile *f;
f = Qopen(path, "rbz");
if (!f)
{
*hndl = NULL;
return -1;
}
*hndl = f;
return COM_filelength(f);
}
/*
============
COM_Path_f
============
*/
void COM_Path_f (void)
{
searchpath_t *s;
Con_Printf ("Current search path:\n");
for (s=com_searchpaths ; s ; s=s->next)
{
if (s == com_base_searchpaths)
Con_Printf ("----------\n");
if (s->pack)
Con_Printf ("%s (%i files)\n", s->pack->filename, s->pack->numfiles);
else
Con_Printf ("%s\n", s->filename);
}
}
/*
============
COM_WriteFile
The filename will be prefixed by the current game directory
============
*/
void COM_WriteFile (char *filename, void *data, int len)
{
QFile *f;
char name[MAX_OSPATH];
snprintf(name, sizeof(name), "%s/%s", com_gamedir, filename);
f = Qopen (name, "wb");
if (!f) {
Sys_mkdir(com_gamedir);
f = Qopen (name, "wb");
if (!f)
Sys_Error ("Error opening %s", filename);
}
Sys_Printf ("COM_WriteFile: %s\n", name);
Qwrite (f, data, len);
Qclose (f);
}
/*
============
COM_CreatePath
Only used for CopyFile and download
============
*/
void COM_CreatePath (char *path)
{
char *ofs;
for (ofs = path+1 ; *ofs ; ofs++)
{
if (*ofs == '/')
{ // create the directory
*ofs = 0;
Sys_mkdir (path);
*ofs = '/';
}
}
}
/*
===========
COM_CopyFile
Copies a file over from the net to the local cache, creating any directories
needed. This is for the convenience of developers using ISDN from home.
===========
*/
void COM_CopyFile (char *netpath, char *cachepath)
{
QFile *in, *out;
int remaining, count;
char buf[4096];
remaining = COM_FileOpenRead (netpath, &in);
COM_CreatePath (cachepath); // create directories up to the cache file
out = Qopen(cachepath, "wb");
if (!out)
Sys_Error ("Error opening %s", cachepath);
while (remaining)
{
if (remaining < sizeof(buf))
count = remaining;
else
count = sizeof(buf);
Qread (in, buf, count);
Qwrite (out, buf, count);
remaining -= count;
}
Qclose (in);
Qclose (out);
}
QFile *COM_OpenRead(const char *path, int offs, int len)
{
int fd=open(path,O_RDONLY);
unsigned char id[2];
unsigned char len_bytes[4];
if (fd==-1) {
Sys_Error ("Couldn't open %s", path);
return 0;
}
if (offs<0 || len<0) {
// normal file
offs=0;
len=lseek(fd,0,SEEK_END);
lseek(fd,0,SEEK_SET);
}
read(fd,id,2);
if (id[0]==0x1f && id[1]==0x8b) {
lseek(fd,offs+len-4,SEEK_SET);
read(fd,len_bytes,4);
len=((len_bytes[3]<<24)
|(len_bytes[2]<<16)
|(len_bytes[1]<<8)
|(len_bytes[0]));
}
lseek(fd,offs,SEEK_SET);
com_filesize=len;
return Qdopen(fd,"rbz");
return 0;
}
/*
===========
COM_FOpenFile
Finds the file in the search path.
Sets com_filesize and one of handle or file
===========
*/
int file_from_pak; // global indicating file came from pack file ZOID
int COM_FOpenFile (char *filename, QFile **gzfile)
{
searchpath_t *search;
char netpath[MAX_OSPATH];
pack_t *pak;
int i;
int findtime;
#ifdef HAS_ZLIB
char gzfilename[MAX_OSPATH];
strncpy(gzfilename,filename,sizeof(gzfilename));
strncat(gzfilename,".gz",sizeof(gzfilename));
#endif
file_from_pak = 0;
//
// search through the path, one element at a time
//
for (search = com_searchpaths ; search ; search = search->next)
{
// is the element a pak file?
if (search->pack)
{
// look through all the pak file elements
pak = search->pack;
for (i=0 ; i<pak->numfiles ; i++) {
char *fn=0;
if (!strcmp (pak->files[i].name, filename))
fn=filename;
#ifdef HAS_ZLIB
else if (!strcmp (pak->files[i].name, gzfilename))
fn=gzfilename;
#endif
if (fn)
{ // found it!
if (developer->value)
Sys_Printf ("PackFile: %s : %s\n",pak->filename, fn);
// open a new file on the pakfile
*gzfile=COM_OpenRead(pak->filename,pak->files[i].filepos,
pak->files[i].filelen);
file_from_pak = 1;
return com_filesize;
}
}
}
else
{
// check a file in the directory tree
snprintf(netpath, sizeof(netpath), "%s/%s",search->filename,
filename);
findtime = Sys_FileTime (netpath);
if (findtime == -1) {
#ifdef HAS_ZLIB
snprintf(netpath, sizeof(netpath), "%s/%s",search->filename,
gzfilename);
findtime = Sys_FileTime (netpath);
if (findtime == -1)
#endif
continue;
}
if(developer->value)
Sys_Printf ("FindFile: %s\n",netpath);
//*file = fopen (netpath, "rb");
//return COM_filelength (*file);
*gzfile=COM_OpenRead(netpath,-1,-1);
return com_filesize;
}
}
Sys_Printf ("FindFile: can't find %s\n", filename);
*gzfile = NULL;
com_filesize = -1;
return -1;
}
/*
============
COM_LoadFile
Filename are relative to the quake directory.
Allways appends a 0 byte to the loaded data.
============
*/
cache_user_t *loadcache;
byte *loadbuf;
int loadsize;
byte *COM_LoadFile (char *path, int usehunk)
{
QFile *h;
byte *buf;
char base[32];
int len;
buf = NULL; // quiet compiler warning
// look for it in the filesystem or pack files
len = com_filesize = COM_FOpenFile (path, &h);
if (!h)
return NULL;
// extract the filename base name for hunk tag
COM_FileBase (path, base);
if (usehunk == 1)
buf = Hunk_AllocName (len+1, base);
else if (usehunk == 2)
buf = Hunk_TempAlloc (len+1);
else if (usehunk == 0)
buf = Z_Malloc (len+1);
else if (usehunk == 3)
buf = Cache_Alloc (loadcache, len+1, base);
else if (usehunk == 4)
{
if (len+1 > loadsize)
buf = Hunk_TempAlloc (len+1);
else
buf = loadbuf;
}
else
Sys_Error ("COM_LoadFile: bad usehunk");
if (!buf)
Sys_Error ("COM_LoadFile: not enough space for %s", path);
((byte *)buf)[len] = 0;
#ifndef SERVERONLY
Draw_BeginDisc ();
#endif
Qread (h, buf, len);
Qclose (h);
#ifndef SERVERONLY
Draw_EndDisc ();
#endif
return buf;
}
byte *COM_LoadHunkFile (char *path)
{
return COM_LoadFile (path, 1);
}
byte *COM_LoadTempFile (char *path)
{
return COM_LoadFile (path, 2);
}
void COM_LoadCacheFile (char *path, struct cache_user_s *cu)
{
loadcache = cu;
COM_LoadFile (path, 3);
}
// uses temp hunk if larger than bufsize
byte *COM_LoadStackFile (char *path, void *buffer, int bufsize)
{
byte *buf;
loadbuf = (byte *)buffer;
loadsize = bufsize;
buf = COM_LoadFile (path, 4);
return buf;
}
/*
=================
COM_LoadPackFile
Takes an explicit (not game tree related) path to a pak file.
Loads the header and directory, adding the files at the beginning
of the list so they override previous pack files.
=================
*/
pack_t *COM_LoadPackFile (char *packfile)
{
dpackheader_t header;
int i;
packfile_t *newfiles;
int numpackfiles;
pack_t *pack;
QFile *packhandle;
dpackfile_t info[MAX_FILES_IN_PACK];
if (COM_FileOpenRead (packfile, &packhandle) == -1)
return NULL;
Qread (packhandle, &header, sizeof(header));
if (header.id[0] != 'P' || header.id[1] != 'A'
|| header.id[2] != 'C' || header.id[3] != 'K')
Sys_Error ("%s is not a packfile", packfile);
header.dirofs = LittleLong (header.dirofs);
header.dirlen = LittleLong (header.dirlen);
numpackfiles = header.dirlen / sizeof(dpackfile_t);
if (numpackfiles > MAX_FILES_IN_PACK)
Sys_Error ("%s has %i files", packfile, numpackfiles);
newfiles = Z_Malloc (numpackfiles * sizeof(packfile_t));
Qseek (packhandle, header.dirofs, SEEK_SET);
Qread (packhandle, info, header.dirlen);
// parse the directory
for (i=0 ; i<numpackfiles ; i++)
{
strcpy (newfiles[i].name, info[i].name);
newfiles[i].filepos = LittleLong(info[i].filepos);
newfiles[i].filelen = LittleLong(info[i].filelen);
}
pack = Z_Malloc (sizeof (pack_t));
strcpy (pack->filename, packfile);
pack->handle = packhandle;
pack->numfiles = numpackfiles;
pack->files = newfiles;
Con_Printf ("Added packfile %s (%i files)\n", packfile, numpackfiles);
return pack;
}
#ifdef GENERATIONS
int
COM_pakzip_checkfile(unzFile *pak, const char *path)
{
int status;
status = unzLocateFile(pak, path, 2);
return (status == UNZ_OK);
}
void
COM_pakzip_closepak(unzFile *pak)
{
if (pak)
unzClose(pak);
pak = NULL;
}
void
COM_pakzip_close(unzFile *pak)
{
unzCloseCurrentFile(pak);
}
int
COM_pakzip_read(unzFile *pak, void *buf, uint_t size, uint_t nmemb)
{
int len = unzReadCurrentFile(pak, buf, size * nmemb);
return len / size;
}
int
COM_pakzip_open(unzFile *pak, const char *path)
{
if (unzLocateFile(pak, path, 2) != UNZ_OK)
return 0;
if (unzOpenCurrentFile(pak) != UNZ_OK)
return 0;
return 1;
}
uint_t
COM_pakzip_getlen(unzFile *pak)
{
unz_file_info info;
if (unzGetCurrentFileInfo(pak, &info, NULL, 0, NULL, 0, NULL, 0)
!= UNZ_OK)
return 0;
return info.uncompressed_size;
}
uint_t
COM_pakzip_readfile(unzFile *pak, const char *path, uint_t bufsize, byte_t *buf)
{
uint_t len;
if (!COM_pakzip_open(pak,path))
return 0;
if ((len = COM_pakzip_getlen(pak)) != 0)
{
if (COM_pakzip_read(pak, (void*)buf, 1, len) != len)
len = 0;
}
COM_pakzip_close(pak);
return len;
}
pack_t *COM_LoadPackZipFile (char *packfile)
{
int i=0;
packfile_t *newfiles;
float numpackfiles;
unzFile *pak;
pack_t *pack_old;
int status;
// This following variable info is unused ATM.
// dpackfile_t info[MAX_FILES_IN_PACK];
char szCurrentFileName[UNZ_MAXFILENAMEINZIP+1];
pak = unzOpen(packfile);
numpackfiles = 0;
Con_Printf ("Assigned Numpackfiles\n");
if (!pak)
return NULL;
newfiles = Hunk_AllocName (numpackfiles * sizeof(unzFile), "packfile");
status=unzGoToFirstFile(pak);
while(status == UNZ_OK) {
// unzGetCurrentFileInfo(pak,NULL,&szCurrentFileName,64,NULL,0,NULL,0);
if(strcmp(newfiles[i].name, szCurrentFileName)==0)
break;
strcpy (newfiles[i].name, szCurrentFileName);
Con_Printf ("strcpy'ed %s into newfiles[%i].name Ok\n",szCurrentFileName, i);
newfiles[i].filepos = LittleLong(unztell(pak));
// newfiles[i].filelen = LittleLong(COM_pak3_readfile(pak,packfile,64,64));
Con_Printf ("Added File\n");
status=unzGoToNextFile(pak);
++numpackfiles;
++i;
}
Con_Printf ("Added files in %s to game data Ok\n", packfile);
pack_old = Hunk_Alloc (sizeof (pack_t));
strcpy (pack_old->filename, packfile);
//pack_old->handle = unzGetLocalExtrafield(packfile, NULL, NULL);
pack_old->numfiles = numpackfiles;
pack_old->files = newfiles;
Con_Printf ("Added packfile %s (%.0f files)\n", packfile, numpackfiles);
COM_pakzip_close(pak);
return pack_old;
}
#endif
void
COM_LoadGameDirectory(char *dir)
{
searchpath_t *search;
pack_t *pak;
char pakfile[MAX_OSPATH];
DIR *dir_ptr;
struct dirent *dirent;
dir_ptr = opendir(dir);
if (!dir_ptr)
return;
while ((dirent = readdir(dir_ptr))) {
if (!fnmatch("*.pak", dirent->d_name, 0)) {
snprintf(pakfile, sizeof(pakfile), "%s/%s", dir, dirent->d_name);
pak = COM_LoadPackFile(pakfile);
if (!pak) {
Sys_Error(va("Bad pakfile %s!!", pakfile));
} else {
search = Z_Malloc (sizeof(searchpath_t));
search->pack = pak;
search->next = com_searchpaths;
com_searchpaths = search;
}
}
}
closedir(dir_ptr);
#ifdef GENERATIONS
for (done=false, i=0 ; !done ; i++ ) {
snprintf(pakfile, sizeof(pakfile), "%s/pak%i.qz", dir, i);
pak = COM_LoadPackZipFile(pakfile);
if(!pak) {
done = true;
} else {
search = Hunk_Alloc (sizeof(searchpath_t));
search->pack = pak;
search->next = com_searchpaths;
com_searchpaths = search;
}
}
#endif
}
/*
================
COM_AddGameDirectory
Sets com_gamedir, adds the directory to the head of the path,
then loads and adds pak1.pak pak2.pak ...
================
*/
void COM_AddGameDirectory (char *dir)
{
searchpath_t *search;
char *p;
if ((p = strrchr(dir, '/')) != NULL)
strcpy(gamedirfile, ++p);
else
strcpy(gamedirfile, dir);
strcpy (com_gamedir, dir);
//
// add the directory to the search path
//
search = Z_Malloc (sizeof(searchpath_t));
strcpy (search->filename, dir);
search->next = com_searchpaths;
com_searchpaths = search;
//
// add any pak files in the format pak0.pak pak1.pak, ...
//
COM_LoadGameDirectory(dir);
}
/*
================
COM_Gamedir
Sets the gamedir and path to a different directory.
================
*/
void COM_Gamedir (char *dir)
{
searchpath_t *search, *next;
if (strstr(dir, "..") || strstr(dir, "/")
|| strstr(dir, "\\") || strstr(dir, ":") )
{
Con_Printf ("Gamedir should be a single filename, not a path\n");
return;
}
if (!strcmp(gamedirfile, dir))
return; // still the same
strcpy (gamedirfile, dir);
//
// free up any current game dir info
//
while (com_searchpaths != com_base_searchpaths)
{
if (com_searchpaths->pack)
{
Qclose (com_searchpaths->pack->handle);
Z_Free (com_searchpaths->pack->files);
Z_Free (com_searchpaths->pack);
}
next = com_searchpaths->next;
Z_Free (com_searchpaths);
com_searchpaths = next;
}
//
// flush all data, so it will be forced to reload
//
Cache_Flush ();
#ifdef QUAKEWORLD
if (!strcmp(dir, GAMENAME) || !strcmp(dir, "qw"))
return;
#endif
snprintf(com_gamedir, sizeof(com_gamedir), "%s/%s", com_basedir, dir);
//
// add the directory to the search path
//
#if 1
//search = Hunk_Alloc (sizeof(searchpath_t));
search = Z_Malloc (sizeof(searchpath_t));
strcpy (search->filename, dir);
search->next = com_searchpaths;
com_searchpaths = search;
#else
search = Z_Malloc (sizeof(searchpath_t));
strcpy (search->filename, com_gamedir);
search->next = com_searchpaths;
com_searchpaths = search;
#endif
//
// add any pak files in the format pak0.pak pak1.pak, ...
//
COM_LoadGameDirectory(dir);
}
/*
================
COM_InitFilesystem
================
*/
void
COM_InitFilesystem ( void )
{
int i, len;
char *p;
char *games;
/*
-basedir <path>
Overrides the system supplied base directory
*/
i = COM_CheckParm ("-basedir");
if (i && i < com_argc-1)
strcpy (com_basedir, com_argv[i+1]);
else
strcpy (com_basedir, host_parms.basedir);
/*
start up with GAMENAME by default
*/
COM_AddGameDirectory (va("%s/" GAMENAME, com_basedir) );
#ifdef QUAKEWORLD
COM_AddGameDirectory (va("%s/qw", com_basedir) );
#endif // QUAKEWORLD
if ( hipnotic ) {
COM_AddGameDirectory (va("%s/hipnotic", com_basedir) );
}
if ( rogue ) {
COM_AddGameDirectory (va("%s/rogue", com_basedir) );
}
i = COM_CheckParm ("-game");
if (i && i < com_argc-1) {
len = strlen(com_argv[i+1]) + 1;
games = (char *) malloc(len);
strcpy(games, com_argv[i+1]);
for ( p = strtok(games, ",") ; p != NULL; p = strtok(NULL, ",")) {
COM_AddGameDirectory (va("%s/%s", com_basedir, p));
}
free(games);
}
// any set gamedirs will be freed up to here
com_base_searchpaths = com_searchpaths;
}
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