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quakeforge/libs/util/quakefs.c
Bill Currie 54604d9aa2 [util] Make hunk (optionally) thread-safe 
For now, the functions check for a null hunk pointer and use the global
hunk (initialized via Memory_Init) if necessary. However, Hunk_Init is
available (and used by Memory_Init) to create a hunk from any arbitrary
memory block. So long as that block is 64-byte aligned, allocations
within the hunk will remain 64-byte aligned.
2021-07-29 11:43:27 +09:00

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/*
quakefs.c
virtual filesystem functions
Copyright (C) 1996-1997 Id Software, Inc.
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:
Free Software Foundation, Inc.
59 Temple Place - Suite 330
Boston, MA 02111-1307, USA
*/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#ifdef HAVE_STRING_H
# include <string.h>
#endif
#ifdef HAVE_STRINGS_H
# include <strings.h>
#endif
#ifdef HAVE_UNISTD_H
# include <unistd.h>
#endif
#ifdef HAVE_IO_H
# include <io.h>
#endif
#if defined(_WIN32) && defined(HAVE_MALLOC_H)
#include <malloc.h>
#endif
#include <ctype.h>
#include <dirent.h>
#include <errno.h>
#include <fcntl.h>
#include <stdarg.h>
#include <stdlib.h>
#include <sys/stat.h>
#ifdef HAVE_FNMATCH_H
# define model_t sunmodel_t
# include <fnmatch.h>
# undef model_t
#else
# ifdef _WIN32
# include "fnmatch.h"
# endif
#endif
#ifdef HAVE_IO_H
# include <io.h>
#endif
#ifdef _MSC_VER
# define _POSIX_
#endif
#include <limits.h>
#include "qfalloca.h"
#include "QF/alloc.h"
#include "QF/cmd.h"
#include "QF/cvar.h"
#include "QF/dstring.h"
#include "QF/hash.h"
#include "QF/mathlib.h"
#include "QF/pak.h"
#include "QF/pakfile.h"
#include "QF/plist.h"
#include "QF/qargs.h"
#include "QF/qendian.h"
#include "QF/qtypes.h"
#include "QF/quakefs.h"
#include "QF/sys.h"
#include "QF/va.h"
#include "QF/zone.h"
#include "compat.h"
#ifndef HAVE_FNMATCH_PROTO
int fnmatch (const char *__pattern, const char *__string, int __flags);
#endif
/*
All of Quake's data access is through a hierchical file system, but the
contents of the file system can be transparently merged from several
sources.
The "user directory" is the path to the directory holding the quake.exe
and all game directories. This can be overridden with the "fs_sharepath"
and "fs_userpath" cvars to allow code debugging in a different directory.
The base directory is used only 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 used only 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
static cvar_t *fs_userpath;
static cvar_t *fs_sharepath;
static cvar_t *fs_dirconf;
VISIBLE const char *qfs_userpath;
VISIBLE int qfs_filesize;
typedef struct searchpath_s {
char *filename;
struct pack_s *pack; // only one of filename / pack will be used
struct searchpath_s *next;
} searchpath_t;
/** Represent a single game directory.
A vpath is the union of all locations searched for a single gamedir. This
includes all pak files in the gamedir in the user's directory, the
filesystem in the user's gamedir, then all pak files in the share
game directory, and finally share's gamedir filesystem.
The purpose is to enable searches to be limited to a single gamedir or to
not search past a certain gamedir.
*/
struct vpath_s { // typedef to vpath_t is in quakefs.h
char *name; // usually the gamedir name
searchpath_t *user;
searchpath_t *share;
struct vpath_s *next;
};
typedef struct int_findfile_s {
findfile_t ff;
struct pack_s *pack;
dpackfile_t *packfile;
const char *path;
int fname_index;
} int_findfile_t;
static searchpath_t *searchpaths_freelist;
static vpath_t *vpaths_freelist;
static vpath_t *qfs_vpaths;
//QFS
typedef struct qfs_var_s {
char *var;
char *val;
} qfs_var_t;
static void qfs_add_gamedir (vpath_t *vpath, const char *dir);
VISIBLE gamedir_t *qfs_gamedir;
static plitem_t *qfs_gd_plist;
static const char *qfs_game = "";
static const char *qfs_default_dirconf =
"{"
" QF = {"
" Path = \"QF\";"
" };"
" Quake = {"
" Inherit = QF;"
" Path = \"id1\";"
" GameCode = \"progs.dat\";"
" HudType = \"id\";"
" };"
" QuakeWorld = {"
" Inherit = (Quake);"
" Path = \"qw\";"
" SkinPath = \"${path}/skins\";"
" GameCode = \"qwprogs.dat\";"
" HudType = \"id\";"
" };"
" \"Hipnotic\" = {"
" Inherit = (Quake);"
" Path = \"hipnotic\";"
" HudType = \"hipnotic\";"
" };"
" \"Rogue\" = {"
" Inherit = (Quake);"
" Path = \"rogue\";"
" HudType = \"rogue\";"
" };"
" \"qw:qw\" = {"
" Inherit = (QuakeWorld);"
" };"
" \"qw:*\" = {"
" Inherit = (QuakeWorld);"
" Path = \"$gamedir\";"
" };"
" \"nq:*\" = {"
" Inherit = (Quake);"
" Path = \"$gamedir\";"
" };"
" \"hipnotic:*\" = {"
" Inherit = (Hipnotic);"
" Path = \"$gamedir\";"
" };"
" \"rogue:*\" = {"
" Inherit = (Rogue);"
" Path = \"$gamedir\";"
" };"
" \"abyss\" = {"
" Inherit = (Quake);"
" Path = \"abyss\";"
" };"
" \"abyss:*\" = {"
" Inherit = (abyss);"
" Path = \"$gamedir\";"
" };"
"}";
#define GAMEDIR_CALLBACK_CHUNK 16
static gamedir_callback_t **gamedir_callbacks;
static int num_gamedir_callbacks;
static int max_gamedir_callbacks;
static searchpath_t *
new_searchpath (void)
{
searchpath_t *searchpath;
ALLOC (16, searchpath_t, searchpaths, searchpath);
return searchpath;
}
static void
delete_searchpath (searchpath_t *searchpath)
{
if (searchpath->pack) {
pack_del (searchpath->pack);
}
if (searchpath->filename) {
free (searchpath->filename);
}
FREE (searchpaths, searchpath);
}
static vpath_t *
new_vpath (void)
{
vpath_t *vpath;
ALLOC (16, vpath_t, vpaths, vpath);
return vpath;
}
static void
delete_vpath (vpath_t *vpath)
{
searchpath_t *next;
if (vpath->name) {
free (vpath->name);
}
while (vpath->user) {
next = vpath->user->next;
delete_searchpath (vpath->user);
vpath->user = next;
}
while (vpath->share) {
next = vpath->share->next;
delete_searchpath (vpath->share);
vpath->share = next;
}
FREE (vpaths, vpath);
}
static const char *
qfs_var_get_key (const void *_v, void *unused)
{
return ((qfs_var_t *)_v)->var;
}
static void
qfs_var_free (void *_v, void *unused)
{
qfs_var_t *v = (qfs_var_t *) _v;
free (v->var);
free (v->val);
free (v);
}
static hashtab_t *
qfs_new_vars (void)
{
return Hash_NewTable (61, qfs_var_get_key, qfs_var_free, 0, 0);
}
static void
qfs_set_var (hashtab_t *vars, const char *var, const char *val)
{
qfs_var_t *v = Hash_Find (vars, var);
if (!v) {
v = malloc (sizeof (qfs_var_t));
v->var = strdup (var);
v->val = 0;
Hash_Add (vars, v);
}
if (v->val)
free (v->val);
v->val = strdup (val);
}
static inline int
qfs_isident (byte c)
{
return ((c >= 'a' && c <='z') || (c >= 'A' && c <='Z')
|| (c >= '0' && c <= '9') || c == '_');
}
static char *
qfs_var_subst (const char *string, hashtab_t *vars)
{
dstring_t *new = dstring_newstr ();
const char *s = string;
const char *e = s;
const char *var;
qfs_var_t *sub;
while (1) {
while (*e && *e != '$')
e++;
dstring_appendsubstr (new, s, (e - s));
if (!*e++)
break;
if (*e == '$') {
dstring_appendstr (new, "$");
s = ++e;
} else if (*e == '{') {
s = e;
while (*e && *e != '}')
e++;
if (!*e) {
dstring_appendsubstr (new, s, (e - s));
break;
}
var = va (0, "%.*s", (int) (e - s) - 1, s + 1);
sub = Hash_Find (vars, var);
if (sub)
dstring_appendstr (new, sub->val);
else
dstring_appendsubstr (new, s - 1, (e - s) + 2);
s = ++e;
} else if (qfs_isident (*e)) {
s = e;
while (qfs_isident (*e))
e++;
var = va (0, "%.*s", (int) (e - s), s);
sub = Hash_Find (vars, var);
if (sub)
dstring_appendstr (new, sub->val);
else
dstring_appendsubstr (new, s - 1, (e - s) + 1);
s = e;
} else {
dstring_appendstr (new, "$");
s = e;
}
}
return dstring_freeze (new);
}
static void
qfs_get_gd_params (plitem_t *gdpl, gamedir_t *gamedir, dstring_t *path,
hashtab_t *vars)
{
plitem_t *p;
const char *ps;
if ((p = PL_ObjectForKey (gdpl, "Path")) && *(ps = PL_String (p))) {
char *str = qfs_var_subst (ps, vars);
qfs_set_var (vars, "path", str);
if (path->str[0])
dstring_appendstr (path, ":");
dstring_appendstr (path, str);
free (str);
}
if (!gamedir->gamecode && (p = PL_ObjectForKey (gdpl, "GameCode")))
gamedir->gamecode = qfs_var_subst (PL_String (p), vars);
if (!gamedir->hudtype && (p = PL_ObjectForKey (gdpl, "HudType")))
gamedir->hudtype = qfs_var_subst (PL_String (p), vars);
if (!gamedir->dir.skins && (p = PL_ObjectForKey (gdpl, "SkinPath")))
gamedir->dir.skins = qfs_var_subst (PL_String (p), vars);
if (!gamedir->dir.models && (p = PL_ObjectForKey (gdpl, "ModelPath")))
gamedir->dir.models = qfs_var_subst (PL_String (p), vars);
if (!gamedir->dir.sound && (p = PL_ObjectForKey (gdpl, "SoundPath")))
gamedir->dir.sound = qfs_var_subst (PL_String (p), vars);
if (!gamedir->dir.maps && (p = PL_ObjectForKey (gdpl, "MapPath")))
gamedir->dir.maps = qfs_var_subst (PL_String (p), vars);
if (!gamedir->dir.shots && (p = PL_ObjectForKey (gdpl, "ShotsPath")))
gamedir->dir.shots = qfs_var_subst (PL_String (p), vars);
}
static void
qfs_inherit (plitem_t *plist, plitem_t *gdpl, gamedir_t *gamedir,
dstring_t *path, hashtab_t *dirs, hashtab_t *vars)
{
plitem_t *base_item;
if (!(base_item = PL_ObjectForKey (gdpl, "Inherit")))
return;
switch (PL_Type (base_item)) {
case QFString:
{
const char *base = PL_String (base_item);
if (Hash_Find (dirs, base))
return;
gdpl = PL_ObjectForKey (plist, base);
if (!gdpl) {
Sys_Printf ("base `%s' not found\n", base);
return;
}
qfs_set_var (vars, "gamedir", base);
Hash_Add (dirs, strdup (base));
qfs_get_gd_params (gdpl, gamedir, path, vars);
qfs_inherit (plist, gdpl, gamedir, path, dirs, vars);
}
break;
case QFArray:
{
int i, num_dirs;
plitem_t *basedir_item;
const char *basedir;
num_dirs = PL_A_NumObjects (base_item);
for (i = 0; i < num_dirs; i++) {
basedir_item = PL_ObjectAtIndex (base_item, i);
if (!basedir_item)
continue;
basedir = PL_String (basedir_item);
if (!basedir || Hash_Find (dirs, basedir))
continue;
gdpl = PL_ObjectForKey (plist, basedir);
if (!gdpl) {
Sys_Printf ("base `%s' not found\n", basedir);
continue;
}
qfs_set_var (vars, "gamedir", basedir);
Hash_Add (dirs, strdup (basedir));
qfs_get_gd_params (gdpl, gamedir, path, vars);
qfs_inherit (plist, gdpl, gamedir, path, dirs, vars);
}
}
break;
default:
break;
}
}
static int
qfs_compare (const void *a, const void *b)
{
return strcmp (*(const char **) a, *(const char **) b);
}
static const char *
qfs_dir_get_key (const void *_k, void *unused)
{
return _k;
}
static void
qfs_dir_free (void *_k, void *unused)
{
free (_k);
}
static plitem_t *
qfs_find_gamedir (const char *name, hashtab_t *dirs)
{
plitem_t *gdpl = PL_ObjectForKey (qfs_gd_plist, name);
if (!gdpl) {
plitem_t *keys = PL_D_AllKeys (qfs_gd_plist);
int num_keys = PL_A_NumObjects (keys);
const char **list = malloc (num_keys * sizeof (char *));
int i;
for (i = 0; i < num_keys; i++)
list[i] = PL_String (PL_ObjectAtIndex (keys, i));
qsort (list, num_keys, sizeof (const char *), qfs_compare);
while (i--) {
if (!fnmatch (list[i], name, 0)) {
gdpl = PL_ObjectForKey (qfs_gd_plist, list[i]);
Hash_Add (dirs, strdup (list[i]));
break;
}
}
free (list);
PL_Free (keys);
}
return gdpl;
}
static void
qfs_process_path (const char *path, const char *gamedir)
{
const char *e = path + strlen (path);
const char *s = e;
char *dir;
vpath_t *vpath;
while (s >= path) {
while (s != path && s[-1] !=':')
s--;
if (s != e) {
dir = nva ("%.*s", (int) (e - s), s);
vpath = new_vpath ();
vpath->name = dir;
qfs_add_gamedir (vpath, dir);
vpath->next = qfs_vpaths;
qfs_vpaths = vpath;
}
e = --s;
}
}
static void
qfs_build_gamedir (const char **list)
{
int j;
gamedir_t *gamedir;
plitem_t *gdpl;
dstring_t *path;
hashtab_t *dirs = Hash_NewTable (31, qfs_dir_get_key, qfs_dir_free, 0, 0);
hashtab_t *vars = qfs_new_vars ();
const char *dir = 0;
qfs_set_var (vars, "game", qfs_game);
if (qfs_gamedir) {
if (qfs_gamedir->name)
free ((char *)qfs_gamedir->name);
if (qfs_gamedir->gamedir)
free ((char *)qfs_gamedir->gamedir);
if (qfs_gamedir->path)
free ((char *)qfs_gamedir->path);
if (qfs_gamedir->gamecode)
free ((char *)qfs_gamedir->gamecode);
if (qfs_gamedir->dir.def)
free ((char *)qfs_gamedir->dir.def);
if (qfs_gamedir->dir.skins)
free ((char *)qfs_gamedir->dir.skins);
if (qfs_gamedir->dir.models)
free ((char *)qfs_gamedir->dir.models);
if (qfs_gamedir->dir.sound)
free ((char *)qfs_gamedir->dir.sound);
if (qfs_gamedir->dir.maps)
free ((char *)qfs_gamedir->dir.maps);
free (qfs_gamedir);
}
while (qfs_vpaths) {
vpath_t *next = qfs_vpaths->next;
delete_vpath (qfs_vpaths);
qfs_vpaths = next;
}
for (j = 0; list[j]; j++)
;
gamedir = calloc (1, sizeof (gamedir_t));
path = dstring_newstr ();
while (j--) {
const char *name = va (0, "%s:%s", qfs_game, dir = list[j]);
if (Hash_Find (dirs, name))
continue;
gdpl = qfs_find_gamedir (name, dirs);
if (!gdpl) {
Sys_Printf ("gamedir `%s' not found\n", name);
continue;
}
Hash_Add (dirs, strdup (name));
if (!j) {
gamedir->name = strdup (name);
gamedir->gamedir = strdup (list[j]);
}
qfs_set_var (vars, "gamedir", dir);
qfs_get_gd_params (gdpl, gamedir, path, vars);
qfs_inherit (qfs_gd_plist, gdpl, gamedir, path, dirs, vars);
}
gamedir->path = path->str;
for (dir = gamedir->path; *dir && *dir != ':'; dir++)
;
gamedir->dir.def = nva ("%.*s", (int) (dir - gamedir->path),
gamedir->path);
if (!gamedir->hudtype)
gamedir->hudtype = strdup ("id");
if (!gamedir->dir.skins)
gamedir->dir.skins = nva ("%s/skins", gamedir->dir.def);
if (!gamedir->dir.models)
gamedir->dir.models = nva ("%s/progs", gamedir->dir.def);
if (!gamedir->dir.sound)
gamedir->dir.sound = nva ("%s/sound", gamedir->dir.def);
if (!gamedir->dir.maps)
gamedir->dir.maps = nva ("%s/maps", gamedir->dir.def);
if (!gamedir->dir.shots)
gamedir->dir.shots = strdup ("QF");
qfs_gamedir = gamedir;
Sys_MaskPrintf (SYS_fs, "%s\n", qfs_gamedir->name);
Sys_MaskPrintf (SYS_fs, " gamedir : %s\n", qfs_gamedir->gamedir);
Sys_MaskPrintf (SYS_fs, " path : %s\n", qfs_gamedir->path);
Sys_MaskPrintf (SYS_fs, " gamecode: %s\n", qfs_gamedir->gamecode);
Sys_MaskPrintf (SYS_fs, " hudtype : %s\n", qfs_gamedir->hudtype);
Sys_MaskPrintf (SYS_fs, " def : %s\n", qfs_gamedir->dir.def);
Sys_MaskPrintf (SYS_fs, " skins : %s\n", qfs_gamedir->dir.skins);
Sys_MaskPrintf (SYS_fs, " models : %s\n", qfs_gamedir->dir.models);
Sys_MaskPrintf (SYS_fs, " sound : %s\n", qfs_gamedir->dir.sound);
Sys_MaskPrintf (SYS_fs, " maps : %s\n", qfs_gamedir->dir.maps);
qfs_process_path (qfs_gamedir->path, dir);
free (path);
Hash_DelTable (dirs);
Hash_DelTable (vars);
}
static void
qfs_load_config (void)
{
QFile *f = 0;
int len;
char *buf;
char *dirconf;
if (*fs_dirconf->string) {
dirconf = Sys_ExpandSquiggle (fs_dirconf->string);
if (!(f = Qopen (dirconf, "rt")))
Sys_MaskPrintf (SYS_fs,
"Could not load `%s', using builtin defaults\n",
dirconf);
free (dirconf);
}
if (!f)
goto no_config;
len = Qfilesize (f);
buf = malloc (len + 3); // +3 for { } and \0
Qread (f, buf + 1, len);
Qclose (f);
// convert the config file to a plist dictionary
buf[0] = '{';
buf[len + 1] = '}';
buf[len + 2] = 0;
if (qfs_gd_plist)
PL_Free (qfs_gd_plist);
qfs_gd_plist = PL_GetPropertyList (buf, 0);
free (buf);
if (qfs_gd_plist && PL_Type (qfs_gd_plist) == QFDictionary)
return; // done
Sys_Printf ("not a dictionary\n");
no_config:
if (qfs_gd_plist)
PL_Free (qfs_gd_plist);
qfs_gd_plist = PL_GetPropertyList (qfs_default_dirconf, 0);
}
/*
qfs_contains_updir
Checks if a string contains an updir ('..'), either at the ends or
surrounded by slashes ('/'). Doesn't check for leading slash.
Assumes canonical (compressed) path.
*/
static inline int
qfs_contains_updir (const char *path, int levels)
{
do {
if (path[0] != '.' || path[1] != '.'
|| (path[2] != '/' && path[2] != 0))
return 0;
if (!path[2])
break;
// first part of path is ../
if (levels <= 0)
return 1;
path += 3;
} while (levels-- > 0);
return 0;
}
static int
qfs_expand_path (dstring_t *full_path, const char *base, const char *path,
int levels)
{
const char *separator = "/";
char *cpath;
int len;
if (!base || !*base) {
errno = EACCES;
return -1;
}
cpath = QFS_CompressPath (path);
if (qfs_contains_updir (cpath, levels)) {
free (cpath);
errno = EACCES;
return -1;
}
if (*cpath == '/')
separator = "";
len = strlen (base);
if (len && base[len - 1] == '/')
len--;
dsprintf (full_path, "%.*s%s%s", len, base, separator, cpath);
free (cpath);
return 0;
}
static int
qfs_expand_userpath (dstring_t *full_path, const char *path)
{
return qfs_expand_path (full_path, qfs_userpath, path, 0);
}
VISIBLE char *
QFS_FileBase (const char *in)
{
const char *base;
const char *ext;
int len;
char *out;
base = QFS_SkipPath (in);
ext = QFS_FileExtension (base);
len = ext - base;
out = malloc (len + 1);
strncpy (out, base, len);
out [len] = 0;
return out;
}
static void
qfs_path_print (searchpath_t *sp)
{
if (sp->pack) {
Sys_Printf ("%s (%i files)\n", sp->pack->filename, sp->pack->numfiles);
} else {
Sys_Printf ("%s\n", sp->filename);
}
}
static void
qfs_path_f (void)
{
vpath_t *vp;
searchpath_t *sp;
Sys_Printf ("Current search path:\n");
for (vp = qfs_vpaths; vp; vp = vp->next) {
Sys_Printf ("%s\n", vp->name);
for (sp = vp->user; sp; sp = sp->next) {
qfs_path_print (sp);
}
for (sp = vp->share; sp; sp = sp->next) {
qfs_path_print (sp);
}
}
}
VISIBLE void
QFS_WriteFile (const char *filename, const void *data, int len)
{
QFile *f;
f = QFS_WOpen (filename, 0);
if (!f) {
Sys_Error ("Error opening %s", filename);
}
Qwrite (f, data, len);
Qclose (f);
}
static int_findfile_t *
qfs_findfile_search (const vpath_t *vpath, const searchpath_t *sp,
const char **fnames)
{
static int_findfile_t found;
const char **fn;
found.ff.vpath = 0;
found.ff.in_pak = false;
found.pack = 0;
found.packfile = 0;
found.fname_index = 0;
if (found.ff.realname) {
free ((char *) found.ff.realname);
found.ff.realname = 0;
}
if (found.path) {
free ((char *) found.path);
found.path = 0;
}
// is the element a pak file?
if (sp->pack) {
dpackfile_t *packfile = 0;
for (fn = fnames; *fn; fn++) {
packfile = pack_find_file (sp->pack, *fn);
if (packfile) {
break;
}
}
if (packfile) {
Sys_MaskPrintf (SYS_fs_f, "PackFile: %s : %s\n",
sp->pack->filename, packfile->name);
found.ff.vpath = vpath;
found.ff.in_pak = true;
found.ff.realname = strdup (*fn);
found.pack = sp->pack;
found.packfile = packfile;
found.fname_index = fn - fnames;
found.path = strdup (sp->pack->filename);
return &found;
}
} else {
// check a file in the directory tree
dstring_t *path = dstring_new ();
for (fn = fnames; *fn; fn++) {
if (qfs_expand_path (path, sp->filename, *fn, 1) == 0) {
if (Sys_FileExists (path->str) == -1) {
continue;
}
Sys_MaskPrintf (SYS_fs_f, "FindFile: %s\n", path->str);
found.ff.vpath = vpath;
found.ff.in_pak = false;
found.ff.realname = strdup (*fn);
found.path = strdup (path->str);
found.fname_index = fn - fnames;
dstring_delete (path);
return &found;
}
}
dstring_delete (path);
}
return 0;
}
static int_findfile_t *
qfs_findfile (const char **fnames, const vpath_t *start, const vpath_t *end)
{
const vpath_t *vp;
searchpath_t *sp;
int_findfile_t *found;
if (!start) {
start = qfs_vpaths;
}
if (end) {
for (vp = start; vp; vp = vp->next) {
if (vp == end) {
break;
}
}
if (!vp) {
Sys_Error ("QFS_FindFile: end vpath not in search list");
}
end = end->next;
}
for (vp = start; vp && vp != end; vp = vp->next) {
for (sp = vp->user; sp; sp = sp->next) {
found = qfs_findfile_search (vp, sp, fnames);
if (found) {
return found;
}
}
for (sp = vp->share; sp; sp = sp->next) {
found = qfs_findfile_search (vp, sp, fnames);
if (found) {
return found;
}
}
}
// file not found
return 0;
}
VISIBLE findfile_t *
QFS_FindFile (const char *fname, const vpath_t *start, const vpath_t *end)
{
int_findfile_t *found;
const char *fname_list[2];
fname_list[0] = fname;
fname_list[1] = 0;
found = qfs_findfile (fname_list, start, end);
if (found) {
return &found->ff;
}
return 0;
}
static QFile *
qfs_openread (const char *path, int offs, int len, int zip)
{
QFile *file;
if (offs < 0 || len < 0)
file = Qopen (path, zip ? "rbz" : "rb");
else
file = Qsubopen (path, offs, len, zip);
if (!file) {
Sys_Error ("Couldn't open %s", path);
return 0;
}
qfs_filesize = Qfilesize (file);
return file;
}
VISIBLE char *
QFS_CompressPath (const char *pth)
{
char *p, *d;
char *path= malloc (strlen (pth) + 1);
for (d = path; *pth; d++, pth++) {
if (*pth == '\\')
*d = '/';
else
*d = *pth;
}
*d = 0;
p = path;
while (*p) {
if (p[0] == '.') {
if (p[1] == '.') {
if (p[2] == '/' || p[2] == 0) {
d = p;
if (d > path)
d--;
while (d > path && d[-1] != '/')
d--;
if (d == path
&& d[0] == '.' && d[1] == '.'
&& (d[2] == '/' || d[2] == '\0')) {
p += 2 + (p[2] == '/');
continue;
}
if (d[0] == '/'
&& d[1] == '.' && d[2] == '.'
&& (d[3] == '/' || d[3] == '\0')) {
*p = 0;
p += 2 + (p[2] == '/');
continue;
}
p = p + 2 + (p[2] == '/');
memmove (d, p, strlen (p) + 1);
p = d;
continue;
}
} else if (p[1] == '/') {
memmove (p, p + 2, strlen (p + 2) + 1);
continue;
} else if (p[1] == 0) {
p[0] = 0;
}
}
while (*p && *p != '/')
p++;
if (*p == '/') {
p++;
// skip over multiple / (foo//bar -> foo/bar)
for (d = p; *d == '/'; d++)
;
if (d != p)
memmove (p, d, strlen (d) + 1);
}
}
// strip any trailing /, but not if it's the root /
if (--p > path && *p == '/')
*p = 0;
return path;
}
VISIBLE findfile_t qfs_foundfile;
/*
QFS_FOpenFile
Finds the file in the search path.
Sets qfs_filesize and one of handle or file
*/
static void
open_file (int_findfile_t *found, QFile **gzfile, int zip)
{
qfs_foundfile = found->ff;
if (found->ff.in_pak) {
*gzfile = qfs_openread (found->pack->filename,
found->packfile->filepos,
found->packfile->filelen, zip);
} else {
*gzfile = qfs_openread (found->path, -1, -1, zip);
}
}
VISIBLE QFile *
_QFS_VOpenFile (const char *filename, int zip,
const vpath_t *start, const vpath_t *end)
{
QFile *gzfile;
int_findfile_t *found;
char *path;
const char *fnames[4];
int zip_flags[3];
int ind;
// make sure they're not trying to do weird stuff with our private files
path = QFS_CompressPath (filename);
if (qfs_contains_updir(path, 1)) {
Sys_MaskPrintf (SYS_fs,
"FindFile: %s: attempt to escape directory tree!\n",
path);
goto error;
}
ind = 0;
#ifdef HAVE_VORBIS
if (strequal (".wav", QFS_FileExtension (path))) {
size_t len = strlen (path);
char *oggfilename = alloca (len + 1);
QFS_StripExtension (path, oggfilename);
strcat (oggfilename, ".ogg");
fnames[ind] = oggfilename;
zip_flags[ind] = 0;
ind++;
}
#endif
#ifdef HAVE_ZLIB
{
char *gzfilename;
gzfilename = alloca (strlen (path) + 3 + 1);
sprintf (gzfilename, "%s.gz", path);
fnames[ind] = gzfilename;
zip_flags[ind] = zip;
ind++;
}
#endif
fnames[ind] = path;
zip_flags[ind] = zip;
ind++;
fnames[ind] = 0;
found = qfs_findfile (fnames, start, end);
if (found) {
open_file (found, &gzfile, zip_flags[found->fname_index]);
free(path);
return gzfile;
}
Sys_MaskPrintf (SYS_fs_nf, "FindFile: can't find %s\n", filename);
error:
qfs_filesize = -1;
free (path);
return 0;
}
VISIBLE QFile *
QFS_VOpenFile (const char *filename, const vpath_t *start, const vpath_t *end)
{
return _QFS_VOpenFile (filename, 1, start, end);
}
VISIBLE QFile *
_QFS_FOpenFile (const char *filename, int zip)
{
return _QFS_VOpenFile (filename, zip, 0, 0);
}
VISIBLE QFile *
QFS_FOpenFile (const char *filename)
{
return _QFS_VOpenFile (filename, 1, 0, 0);
}
static cache_user_t *loadcache;
/*
QFS_LoadFile
Filename are relative to the quake directory.
Always appends a 0 byte to the loaded data.
*/
VISIBLE byte *
QFS_LoadFile (QFile *file, int usehunk)
{
byte *buf = NULL;
char *base;
int len;
// look for it in the filesystem or pack files
if (!file)
return NULL;
base = strdup ("QFS_LoadFile");
len = qfs_filesize = Qfilesize (file);
// extract the filename base name for hunk tag
//base = QFS_FileBase (path);
if (usehunk == 1)
buf = Hunk_AllocName (0, len + 1, base);
else if (usehunk == 2)
buf = Hunk_TempAlloc (0, len + 1);
else if (usehunk == 0)
buf = calloc (1, len + 1);
else if (usehunk == 3)
buf = Cache_Alloc (loadcache, len + 1, base);
else
Sys_Error ("QFS_LoadFile: bad usehunk");
if (!buf)
Sys_Error ("QFS_LoadFile: not enough space");
//Sys_Error ("QFS_LoadFile: not enough space for %s", path);
buf[len] = 0;
Qread (file, buf, len);
Qclose (file);
free (base);
return buf;
}
VISIBLE byte *
QFS_LoadHunkFile (QFile *file)
{
return QFS_LoadFile (file, 1);
}
VISIBLE void
QFS_LoadCacheFile (QFile *file, struct cache_user_s *cu)
{
loadcache = cu;
QFS_LoadFile (file, 3);
}
/*
qfs_load_pakfile
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.
*/
static pack_t *
qfs_load_pakfile (char *packfile)
{
pack_t *pack = pack_open (packfile);
if (pack)
Sys_MaskPrintf (SYS_fs, "Added packfile %s (%i files)\n",
packfile, pack->numfiles);
return pack;
}
#define FBLOCK_SIZE 32
// Note, this is /NOT/ a work-alike strcmp, this groups numbers sanely.
static int
qfs_file_sort (char **os1, char **os2)
{
int in1, in2, n1, n2;
char *s1, *s2;
s1 = *os1;
s2 = *os2;
while (1) {
n1 = n2 = 0;
if ((in1 = isdigit ((byte) *s1)))
n1 = strtol (s1, &s1, 10);
if ((in2 = isdigit ((byte) *s2)))
n2 = strtol (s2, &s2, 10);
if (in1 && in2) {
if (n1 != n2)
return n1 - n2;
} else {
if (*s1 != *s2)
return *s1 - *s2;
else if (*s1 == '\0')
return *s1 - *s2;
s1++;
s2++;
}
}
}
static void
qfs_load_gamedir (searchpath_t **searchpath, const char *dir)
{
searchpath_t *sp;
pack_t *pak;
DIR *dir_ptr;
struct dirent *dirent;
char **pakfiles = NULL;
int i = 0, bufsize = 0, count = 0;
Sys_MaskPrintf (SYS_fs, "qfs_load_gamedir (\"%s\")\n", dir);
pakfiles = calloc (1, FBLOCK_SIZE * sizeof (char *));
bufsize += FBLOCK_SIZE;
if (!pakfiles)
goto qfs_load_gamedir_free;
for (i = 0; i < bufsize; i++) {
pakfiles[i] = NULL;
}
dir_ptr = opendir (dir);
if (!dir_ptr)
goto qfs_load_gamedir_free;
while ((dirent = readdir (dir_ptr))) {
if (!fnmatch ("*.pak", dirent->d_name, 0)) {
if (count >= bufsize) {
bufsize += FBLOCK_SIZE;
pakfiles = realloc (pakfiles, bufsize * sizeof (char *));
if (!pakfiles)
goto qfs_load_gamedir_free;
for (i = count; i < bufsize; i++)
pakfiles[i] = NULL;
}
// at this point, dir is known to not have a trailing /, and
// dirent->d_name definitely won't start with one.
pakfiles[count] = nva ("%s/%s", dir, dirent->d_name);
if (!pakfiles[count])
Sys_Error ("qfs_load_gamedir: Memory allocation failure");
count++;
}
}
closedir (dir_ptr);
qsort (pakfiles, count, sizeof (char *),
(int (*)(const void *, const void *)) qfs_file_sort);
for (i = 0; i < count; i++) {
pak = qfs_load_pakfile (pakfiles[i]);
if (!pak) {
Sys_Error ("Bad pakfile %s!!", pakfiles[i]);
} else {
sp = new_searchpath ();
sp->pack = pak;
sp->next = *searchpath;
*searchpath = sp;
}
}
qfs_load_gamedir_free:
for (i = 0; i < count; i++)
free (pakfiles[i]);
free (pakfiles);
}
/*
qfs_add_dir
Adds the directory to the head of the path, then loads and adds pak0.pak
pak1.pak ...
*/
static void
qfs_add_dir (searchpath_t **searchpath, const char *dir)
{
searchpath_t *sp;
// add the directory to the search path
sp = new_searchpath ();
sp->filename = strdup (dir);
sp->next = *searchpath;
*searchpath = sp;
// add any pak files in the format pak0.pak pak1.pak, ...
qfs_load_gamedir (searchpath, dir);
}
static void
qfs_add_gamedir (vpath_t *vpath, const char *dir)
{
const char *e;
const char *s;
dstring_t *s_dir;
dstring_t *f_dir;
if (!*dir)
return;
e = fs_sharepath->string + strlen (fs_sharepath->string);
s = e;
s_dir = dstring_new ();
f_dir = dstring_new ();
while (s >= fs_sharepath->string) {
while (s != fs_sharepath->string && s[-1] !=':')
s--;
if (s != e) {
dsprintf (s_dir, "%.*s", (int) (e - s), s);
if (strcmp (s_dir->str, fs_userpath->string) != 0) {
if (qfs_expand_path (f_dir, s_dir->str, dir, 0) != 0) {
Sys_Printf ("dropping bad directory %s\n", dir);
break;
}
Sys_MaskPrintf (SYS_fs, "qfs_add_gamedir (\"%s\")\n",
f_dir->str);
qfs_add_dir (&vpath->share, f_dir->str);
}
}
e = --s;
}
qfs_expand_userpath (f_dir, dir);
Sys_MaskPrintf (SYS_fs, "qfs_add_gamedir (\"%s\")\n", f_dir->str);
qfs_add_dir (&vpath->user, f_dir->str);
dstring_delete (f_dir);
dstring_delete (s_dir);
}
/*
QFS_Gamedir
Sets the gamedir and path to a different directory.
*/
VISIBLE void
QFS_Gamedir (const char *gamedir)
{
int i;
const char *list[2] = {gamedir, 0};
qfs_build_gamedir (list);
// Make sure everyone else knows we've changed gamedirs
for (i = 0; i < num_gamedir_callbacks; i++) {
gamedir_callbacks[i] (0);
}
Cache_Flush ();
for (i = 0; i < num_gamedir_callbacks; i++) {
gamedir_callbacks[i] (1);
}
}
VISIBLE void
QFS_GamedirCallback (gamedir_callback_t *func)
{
if (num_gamedir_callbacks == max_gamedir_callbacks) {
size_t size = (max_gamedir_callbacks + GAMEDIR_CALLBACK_CHUNK)
* sizeof (gamedir_callback_t *);
gamedir_callbacks = realloc (gamedir_callbacks, size);
if (!gamedir_callbacks)
Sys_Error ("Too many gamedir callbacks!\n");
max_gamedir_callbacks += GAMEDIR_CALLBACK_CHUNK;
}
if (!func) {
Sys_Error ("null gamedir callback\n");
}
gamedir_callbacks[num_gamedir_callbacks] = func;
num_gamedir_callbacks++;
}
static void
qfs_path_cvar (cvar_t *var)
{
char *cpath = QFS_CompressPath (var->string);
if (strcmp (cpath, var->string))
Cvar_Set (var, cpath);
free (cpath);
}
static void
qfs_shutdown (void *data)
{
while (qfs_vpaths) {
vpath_t *next = qfs_vpaths->next;
delete_vpath (qfs_vpaths);
qfs_vpaths = next;
}
}
VISIBLE void
QFS_Init (const char *game)
{
int i;
fs_sharepath = Cvar_Get ("fs_sharepath", FS_SHAREPATH, CVAR_ROM,
qfs_path_cvar,
"location of shared (read-only) game "
"directories");
fs_userpath = Cvar_Get ("fs_userpath", FS_USERPATH, CVAR_ROM,
qfs_path_cvar,
"location of your game directories");
fs_dirconf = Cvar_Get ("fs_dirconf", "", CVAR_ROM, NULL,
"full path to gamedir.conf FIXME");
Cmd_AddCommand ("path", qfs_path_f, "Show what paths Quake is using");
qfs_userpath = Sys_ExpandSquiggle (fs_userpath->string);
qfs_load_config ();
qfs_game = game;
if ((i = COM_CheckParm ("-game")) && i < com_argc - 1) {
char *gamedirs = NULL;
const char **list;
char *where;
int j, count = 1;
gamedirs = strdup (com_argv[i + 1]);
for (j = 0; gamedirs[j]; j++)
if (gamedirs[j] == ',')
count++;
list = calloc (count + 1, sizeof (char *));
j = 0;
where = strtok (gamedirs, ",");
while (where) {
list[j++] = where;
where = strtok (NULL, ",");
}
qfs_build_gamedir (list);
free (gamedirs);
free ((void*)list);
} else {
QFS_Gamedir ("");
}
Sys_RegisterShutdown (qfs_shutdown, 0);
}
VISIBLE const char *
QFS_SkipPath (const char *pathname)
{
const char *last;
// char after last / on the line
if ((last = strrchr (pathname, '/')))
last++;
else
last = pathname;
return last;
}
VISIBLE void
QFS_StripExtension (const char *in, char *out)
{
char *tmp;
if (out != in)
strcpy (out, in);
tmp = out + (QFS_FileExtension (out) - out);
*tmp = 0;
}
VISIBLE const char *
QFS_FileExtension (const char *in)
{
const char *tmp;
const char *end = in + strlen (in);
for (tmp = end; tmp != in; tmp--) {
if (tmp[-1] == '/')
return end;
if (tmp[-1] == '.') {
if (tmp - 1 == in || tmp[-2] == '/')
return end;
return tmp - 1;
}
}
return end;
}
VISIBLE void
QFS_DefaultExtension (dstring_t *path, const char *extension)
{
const char *ext;
// if path doesn't have a .EXT, append extension
// (extension should include the .)
ext = QFS_FileExtension (path->str);
if (*ext)
return; // it has an extension
dstring_appendstr (path, extension);
}
VISIBLE void
QFS_SetExtension (struct dstring_s *path, const char *extension)
{
const char *ext = QFS_FileExtension (path->str);
int offs = ext - path->str;
if (*ext) {
// path has an extension... cut it off
path->str[offs] = 0;
path->size = offs + 1;
}
dstring_appendstr (path, extension);
}
VISIBLE int
QFS_NextFilename (dstring_t *filename, const char *prefix, const char *ext)
{
char *digits;
int i;
int ret = 0;
dstring_t *full_path = dstring_new ();
dsprintf (filename, "%s0000%s", prefix, ext);
digits = filename->str + strlen (prefix);
for (i = 0; i <= 9999; i++) {
digits[0] = i / 1000 + '0';
digits[1] = i / 100 % 10 + '0';
digits[2] = i / 10 % 10 + '0';
digits[3] = i % 10 + '0';
if (qfs_expand_userpath (full_path, filename->str) == -1)
break;
if (Sys_FileExists (full_path->str) == -1) {
// file doesn't exist, so we can use this name
ret = 1;
break;
}
}
dstring_delete (full_path);
return ret;
}
VISIBLE QFile *
QFS_Open (const char *path, const char *mode)
{
dstring_t *full_path = dstring_new ();
QFile *file = 0;
const char *m;
int write = 0;
if (qfs_expand_userpath (full_path, path) == 0) {
Sys_MaskPrintf (SYS_fs, "QFS_Open: %s %s\n", full_path->str, mode);
for (m = mode; *m; m++)
if (*m == 'w' || *m == '+' || *m == 'a')
write = 1;
if (write)
if (Sys_CreatePath (full_path->str) == -1)
goto done;
file = Qopen (full_path->str, mode);
}
done:
dstring_delete (full_path);
return file;
}
VISIBLE QFile *
QFS_WOpen (const char *path, int zip)
{
char mode[5] = "wb\000\000\000";
if (zip) {
mode[2] = 'z';
mode[3] = bound (1, zip, 9) + '0';
}
return QFS_Open (path, mode);
}
VISIBLE int
QFS_Rename (const char *old_path, const char *new_path)
{
dstring_t *full_old = dstring_new ();
dstring_t *full_new = dstring_new ();
int ret;
if ((ret = qfs_expand_userpath (full_old, old_path)) != -1)
if ((ret = qfs_expand_userpath (full_new, new_path)) != -1)
if ((ret = Sys_CreatePath (full_new->str)) != -1) {
Sys_MaskPrintf (SYS_fs, "QFS_Rename %s %s\n", full_old->str,
full_new->str);
ret = Qrename (full_old->str, full_new->str);
}
dstring_delete (full_old);
dstring_delete (full_new);
return ret;
}
VISIBLE int
QFS_Remove (const char *path)
{
dstring_t *full_path = dstring_new ();
int ret;
if ((ret = qfs_expand_userpath (full_path, path)) != -1)
ret = Qremove (full_path->str);
dstring_delete (full_path);
return ret;
}
VISIBLE filelist_t *
QFS_FilelistNew (void)
{
return calloc (1, sizeof (filelist_t));
}
VISIBLE void
QFS_FilelistAdd (filelist_t *filelist, const char *fname, const char *ext)
{
char **new_list;
char *s, *str;
while ((s = strchr(fname, '/')))
fname = s + 1;
if (filelist->count == filelist->size) {
filelist->size += 32;
new_list = realloc (filelist->list, filelist->size * sizeof (char *));
if (!new_list) {
filelist->size -= 32;
return;
}
filelist->list = new_list;
}
str = strdup (fname);
if (ext && (s = strstr(str, va (0, ".%s", ext))))
*s = 0;
filelist->list[filelist->count++] = str;
}
static void
qfs_filelistfill_do (filelist_t *list, const searchpath_t *search, const char *cp, const char *ext, int strip)
{
const char *separator = "/";
if (*cp && cp[strlen (cp) - 1] == '/')
separator = "";
if (search->pack) {
int i;
pack_t *pak = search->pack;
for (i = 0; i < pak->numfiles; i++) {
char *name = pak->files[i].name;
if (!fnmatch (va (0, "%s%s*.%s", cp, separator, ext), name,
FNM_PATHNAME)
|| !fnmatch (va (0, "%s%s*.%s.gz", cp, separator, ext), name,
FNM_PATHNAME))
QFS_FilelistAdd (list, name, strip ? ext : 0);
}
} else {
DIR *dir_ptr;
struct dirent *dirent;
dir_ptr = opendir (va (0, "%s/%s", search->filename, cp));
if (!dir_ptr)
return;
while ((dirent = readdir (dir_ptr)))
if (!fnmatch (va (0, "*.%s", ext), dirent->d_name, 0)
|| !fnmatch (va (0, "*.%s.gz", ext), dirent->d_name, 0))
QFS_FilelistAdd (list, dirent->d_name, strip ? ext : 0);
closedir (dir_ptr);
}
}
VISIBLE void
QFS_FilelistFill (filelist_t *list, const char *path, const char *ext,
int strip)
{
vpath_t *vpath;
searchpath_t *search;
char *cpath, *cp;
if (strchr (ext, '/') || strchr (ext, '\\'))
return;
cp = cpath = QFS_CompressPath (path);
for (vpath = qfs_vpaths; vpath; vpath = vpath->next) {
for (search = vpath->user; search; search = search->next) {
qfs_filelistfill_do (list, search, cp, ext, strip);
}
}
free (cpath);
}
VISIBLE void
QFS_FilelistFree (filelist_t *list)
{
int i;
for (i = 0; i < list->count; i++)
free (list->list[i]);
free (list->list);
free (list);
}
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