4 Copyright (C) 2003 Mathieu Olivier
5 Copyright (C) 1999,2000 contributors of the QuakeForge project
7 This program is free software; you can redistribute it and/or
8 modify it under the terms of the GNU General Public License
9 as published by the Free Software Foundation; either version 2
10 of the License, or (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
16 See the GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with this program; if not, write to:
21 Free Software Foundation, Inc.
22 59 Temple Place - Suite 330
23 Boston, MA 02111-1307, USA
38 # include <sys/stat.h>
51 All of Quake's data access is through a hierchal file system, but the contents
52 of the file system can be transparently merged from several sources.
54 The "base directory" is the path to the directory holding the quake.exe and
55 all game directories. The sys_* files pass this to host_init in
56 quakeparms_t->basedir. This can be overridden with the "-basedir" command
57 line parm to allow code debugging in a different directory. The base
58 directory is only used during filesystem initialization.
60 The "game directory" is the first tree on the search path and directory that
61 all generated files (savegames, screenshots, demos, config files) will be
62 saved to. This can be overridden with the "-game" command line parameter.
63 The game directory can never be changed while quake is executing. This is a
64 precacution against having a malicious server instruct clients to write files
65 over areas they shouldn't.
71 =============================================================================
75 =============================================================================
78 // Magic numbers of a ZIP file (big-endian format)
79 #define ZIP_DATA_HEADER 0x504B0304 // "PK\3\4"
80 #define ZIP_CDIR_HEADER 0x504B0102 // "PK\1\2"
81 #define ZIP_END_HEADER 0x504B0506 // "PK\5\6"
83 // Other constants for ZIP files
84 #define ZIP_MAX_COMMENTS_SIZE ((unsigned short)0xFFFF)
85 #define ZIP_END_CDIR_SIZE 22
86 #define ZIP_CDIR_CHUNK_BASE_SIZE 46
87 #define ZIP_LOCAL_CHUNK_BASE_SIZE 30
89 // Zlib constants (from zlib.h)
90 #define Z_SYNC_FLUSH 2
93 #define Z_STREAM_END 1
94 #define ZLIB_VERSION "1.1.4"
98 =============================================================================
102 =============================================================================
105 // Zlib stream (from zlib.h)
106 // Warning: some pointers we don't use directly have
107 // been cast to "void*" for a matter of simplicity
110 qbyte *next_in; // next input byte
111 unsigned int avail_in; // number of bytes available at next_in
112 unsigned long total_in; // total nb of input bytes read so far
114 qbyte *next_out; // next output byte should be put there
115 unsigned int avail_out; // remaining free space at next_out
116 unsigned long total_out; // total nb of bytes output so far
118 char *msg; // last error message, NULL if no error
119 void *state; // not visible by applications
121 void *zalloc; // used to allocate the internal state
122 void *zfree; // used to free the internal state
123 void *opaque; // private data object passed to zalloc and zfree
125 int data_type; // best guess about the data type: ascii or binary
126 unsigned long adler; // adler32 value of the uncompressed data
127 unsigned long reserved; // reserved for future use
131 // Our own file structure on top of FILE
135 FS_FLAG_PACKED = (1 << 0), // inside a package (PAK or PK3)
136 FS_FLAG_DEFLATED = (1 << 1) // file is compressed using the deflate algorithm (PK3 only)
139 #define ZBUFF_SIZE 1024
143 size_t real_length; // length of the uncompressed file
144 size_t in_ind, in_max; // input buffer index and counter
145 size_t in_position; // position in the compressed file
146 size_t out_ind, out_max; // output buffer index and counter
147 size_t out_position; // how many bytes did we uncompress until now?
148 qbyte input [ZBUFF_SIZE];
149 qbyte output [ZBUFF_SIZE];
156 size_t length; // file size on disk (PACKED only)
157 size_t offset; // offset into a package (PACKED only)
158 size_t position; // current position in the file (PACKED only)
159 ztoolkit_t* z; // used for inflating (DEFLATED only)
163 // ------ PK3 files on disk ------ //
165 // You can get the complete ZIP format description from PKWARE website
169 unsigned int signature;
170 unsigned short disknum;
171 unsigned short cdir_disknum; // number of the disk with the start of the central directory
172 unsigned short localentries; // number of entries in the central directory on this disk
173 unsigned short nbentries; // total number of entries in the central directory on this disk
174 unsigned int cdir_size; // size of the central directory
175 unsigned int cdir_offset; // with respect to the starting disk number
176 unsigned short comment_size;
177 } pk3_endOfCentralDir_t;
180 // ------ PAK files on disk ------ //
184 int filepos, filelen;
195 // Packages in memory
199 FILE_FLAG_TRUEOFFS = (1 << 0), // the offset in packfile_t is the true contents offset
200 FILE_FLAG_DEFLATED = (1 << 1) // file compressed using the deflate algorithm
205 char name [MAX_QPATH];
208 size_t packsize; // size in the package
209 size_t realsize; // real file size (uncompressed)
212 typedef struct pack_s
214 char filename [MAX_OSPATH];
216 int ignorecase; // PK3 ignores case
224 // Search paths for files (including packages)
225 typedef struct searchpath_s
227 // only one of filename / pack will be used
228 char filename[MAX_OSPATH];
230 struct searchpath_s *next;
235 =============================================================================
239 =============================================================================
242 mempool_t *fs_mempool;
243 mempool_t *pak_mempool;
247 pack_t *packlist = NULL;
249 searchpath_t *fs_searchpaths;
251 #define MAX_FILES_IN_PACK 65536
253 char fs_gamedir[MAX_OSPATH];
254 char fs_basedir[MAX_OSPATH];
256 qboolean fs_modified; // set true if using non-id files
260 =============================================================================
262 PRIVATE FUNCTIONS - PK3 HANDLING
264 =============================================================================
267 // Functions exported from zlib
269 # define ZEXPORT WINAPI
274 static int (ZEXPORT *qz_inflate) (z_stream* strm, int flush);
275 static int (ZEXPORT *qz_inflateEnd) (z_stream* strm);
276 static int (ZEXPORT *qz_inflateInit2_) (z_stream* strm, int windowBits, const char *version, int stream_size);
277 static int (ZEXPORT *qz_inflateReset) (z_stream* strm);
279 #define qz_inflateInit2(strm, windowBits) \
280 qz_inflateInit2_((strm), (windowBits), ZLIB_VERSION, sizeof(z_stream))
282 static dllfunction_t zlibfuncs[] =
284 {"inflate", (void **) &qz_inflate},
285 {"inflateEnd", (void **) &qz_inflateEnd},
286 {"inflateInit2_", (void **) &qz_inflateInit2_},
287 {"inflateReset", (void **) &qz_inflateReset},
291 // Handle for Zlib DLL
292 static dllhandle_t zlib_dll = NULL;
302 void PK3_CloseLibrary (void)
307 Sys_UnloadLibrary (zlib_dll);
316 Try to load the Zlib DLL
319 qboolean PK3_OpenLibrary (void)
322 const dllfunction_t *func;
329 dllname = "zlib.dll";
331 dllname = "libz.so.1";
335 for (func = zlibfuncs; func && func->name != NULL; func++)
336 *func->funcvariable = NULL;
339 if (! (zlib_dll = Sys_LoadLibrary (dllname)))
341 Con_Printf("Can't find %s. Compressed files support disabled\n", dllname);
345 // Get the function adresses
346 for (func = zlibfuncs; func && func->name != NULL; func++)
347 if (!(*func->funcvariable = (void *) Sys_GetProcAddress (zlib_dll, func->name)))
349 Con_Printf("missing function \"%s\" - broken Zlib library!\n", func->name);
354 Con_Printf("%s loaded. Compressed files support enabled\n", dllname);
361 PK3_GetEndOfCentralDir
363 Extract the end of the central directory from a PK3 package
366 qboolean PK3_GetEndOfCentralDir (const char *packfile, FILE *packhandle, pk3_endOfCentralDir_t *eocd)
368 long filesize, maxsize;
372 // Get the package size
373 fseek (packhandle, 0, SEEK_END);
374 filesize = ftell (packhandle);
375 if (filesize < ZIP_END_CDIR_SIZE)
378 // Load the end of the file in memory
379 if (filesize < ZIP_MAX_COMMENTS_SIZE + ZIP_END_CDIR_SIZE)
382 maxsize = ZIP_MAX_COMMENTS_SIZE + ZIP_END_CDIR_SIZE;
383 buffer = Mem_Alloc (tempmempool, maxsize);
384 fseek (packhandle, filesize - maxsize, SEEK_SET);
385 if (fread (buffer, 1, maxsize, packhandle) != (unsigned long) maxsize)
391 // Look for the end of central dir signature around the end of the file
392 maxsize -= ZIP_END_CDIR_SIZE;
393 ptr = &buffer[maxsize];
395 while (BuffBigLong (ptr) != ZIP_END_HEADER)
407 memcpy (eocd, ptr, ZIP_END_CDIR_SIZE);
408 eocd->signature = LittleLong (eocd->signature);
409 eocd->disknum = LittleShort (eocd->disknum);
410 eocd->cdir_disknum = LittleShort (eocd->cdir_disknum);
411 eocd->localentries = LittleShort (eocd->localentries);
412 eocd->nbentries = LittleShort (eocd->nbentries);
413 eocd->cdir_size = LittleLong (eocd->cdir_size);
414 eocd->cdir_offset = LittleLong (eocd->cdir_offset);
415 eocd->comment_size = LittleShort (eocd->comment_size);
427 Extract the file list from a PK3 file
430 int PK3_BuildFileList (pack_t *pack, const pk3_endOfCentralDir_t *eocd)
432 qbyte *central_dir, *ptr;
436 // Load the central directory in memory
437 central_dir = Mem_Alloc (tempmempool, eocd->cdir_size);
438 fseek (pack->handle, eocd->cdir_offset, SEEK_SET);
439 fread (central_dir, 1, eocd->cdir_size, pack->handle);
441 // Extract the files properties
442 // The parsing is done "by hand" because some fields have variable sizes and
443 // the constant part isn't 4-bytes aligned, which makes the use of structs difficult
444 remaining = eocd->cdir_size;
447 for (ind = 0; ind < eocd->nbentries; ind++)
449 size_t namesize, count;
452 // Checking the remaining size
453 if (remaining < ZIP_CDIR_CHUNK_BASE_SIZE)
455 Mem_Free (central_dir);
458 remaining -= ZIP_CDIR_CHUNK_BASE_SIZE;
461 if (BuffBigLong (ptr) != ZIP_CDIR_HEADER)
463 Mem_Free (central_dir);
467 namesize = BuffLittleShort (&ptr[28]); // filename length
469 // Check encryption, compression, and attributes
470 // 1st uint8 : general purpose bit flag
471 // Check bits 0 (encryption), 3 (data descriptor after the file), and 5 (compressed patched data (?))
472 // 2nd uint8 : external file attributes
473 // Check bits 3 (file is a directory) and 5 (file is a volume (?))
474 if ((ptr[8] & 0x29) == 0 && (ptr[38] & 0x18) == 0)
476 // Still enough bytes for the name?
477 if ((size_t) remaining < namesize || namesize >= sizeof (*pack->files))
479 Mem_Free (central_dir);
483 // WinZip doesn't use the "directory" attribute, so we need to check the name directly
484 if (ptr[ZIP_CDIR_CHUNK_BASE_SIZE + namesize - 1] != '/')
487 file = &pack->files[pack->numfiles];
488 memcpy (file->name, &ptr[ZIP_CDIR_CHUNK_BASE_SIZE], namesize);
489 file->name[namesize] = '\0';
491 // Compression, sizes and offset
492 if (BuffLittleShort (&ptr[10]))
493 file->flags = FILE_FLAG_DEFLATED;
494 file->packsize = BuffLittleLong (&ptr[20]);
495 file->realsize = BuffLittleLong (&ptr[24]);
496 file->offset = BuffLittleLong (&ptr[42]);
502 // Skip the name, additionnal field, and comment
503 // 1er uint16 : extra field length
504 // 2eme uint16 : file comment length
505 count = namesize + BuffLittleShort (&ptr[30]) + BuffLittleShort (&ptr[32]);
506 ptr += ZIP_CDIR_CHUNK_BASE_SIZE + count;
510 Mem_Free (central_dir);
511 return pack->numfiles;
519 Create a package entry associated with a PK3 file
522 pack_t *FS_LoadPackPK3 (const char *packfile)
525 pk3_endOfCentralDir_t eocd;
529 packhandle = fopen (packfile, "rb");
533 if (! PK3_GetEndOfCentralDir (packfile, packhandle, &eocd))
534 Sys_Error ("%s is not a PK3 file", packfile);
536 // Multi-volume ZIP archives are NOT allowed
537 if (eocd.disknum != 0 || eocd.cdir_disknum != 0)
538 Sys_Error ("%s is a multi-volume ZIP archive", packfile);
540 // We only need to do this test if MAX_FILES_IN_PACK is lesser than 65535
541 // since eocd.nbentries is an unsigned 16 bits integer
542 #if MAX_FILES_IN_PACK < 65535
543 if (eocd.nbentries > MAX_FILES_IN_PACK)
544 Sys_Error ("%s contains too many files (%hu)", packfile, eocd.nbentries);
547 // Create a package structure in memory
548 pack = Mem_Alloc (pak_mempool, sizeof (pack_t));
549 pack->ignorecase = true; // PK3 ignores case
550 strlcpy (pack->filename, packfile, sizeof (pack->filename));
551 pack->handle = packhandle;
552 pack->numfiles = eocd.nbentries;
553 pack->mempool = Mem_AllocPool (packfile);
554 pack->files = Mem_Alloc (pack->mempool, eocd.nbentries * sizeof(packfile_t));
555 pack->next = packlist;
558 real_nb_files = PK3_BuildFileList (pack, &eocd);
559 if (real_nb_files <= 0)
560 Sys_Error ("%s is not a valid PK3 file", packfile);
562 Con_Printf ("Added packfile %s (%i files)\n", packfile, real_nb_files);
569 PK3_GetTrueFileOffset
571 Find where the true file data offset is
574 void PK3_GetTrueFileOffset (packfile_t *file, pack_t *pack)
576 qbyte buffer [ZIP_LOCAL_CHUNK_BASE_SIZE];
580 if (file->flags & FILE_FLAG_TRUEOFFS)
583 // Load the local file description
584 fseek (pack->handle, file->offset, SEEK_SET);
585 count = fread (buffer, 1, ZIP_LOCAL_CHUNK_BASE_SIZE, pack->handle);
586 if (count != ZIP_LOCAL_CHUNK_BASE_SIZE || BuffBigLong (buffer) != ZIP_DATA_HEADER)
587 Sys_Error ("Can't retrieve file %s in package %s", file->name, pack->filename);
589 // Skip name and extra field
590 file->offset += BuffLittleShort (&buffer[26]) + BuffLittleShort (&buffer[28]) + ZIP_LOCAL_CHUNK_BASE_SIZE;
592 file->flags |= FILE_FLAG_TRUEOFFS;
597 =============================================================================
599 OTHER PRIVATE FUNCTIONS
601 =============================================================================
609 Only used for FS_WriteFile.
612 void FS_CreatePath (char *path)
616 for (ofs = path+1 ; *ofs ; ofs++)
618 if (*ofs == '/' || *ofs == '\\')
620 // create the directory
636 void FS_Path_f (void)
640 Con_Printf ("Current search path:\n");
641 for (s=fs_searchpaths ; s ; s=s->next)
645 Con_Printf ("%s (%i files)\n", s->pack->filename, s->pack->numfiles);
648 Con_Printf ("%s\n", s->filename);
657 Takes an explicit (not game tree related) path to a pak file.
659 Loads the header and directory, adding the files at the beginning
660 of the list so they override previous pack files.
663 pack_t *FS_LoadPackPAK (const char *packfile)
665 dpackheader_t header;
669 dpackfile_t *info; // temporary alloc, allowing huge pack directories
671 packhandle = fopen (packfile, "rb");
675 fread ((void *)&header, 1, sizeof(header), packhandle);
676 if (memcmp(header.id, "PACK", 4))
677 Sys_Error ("%s is not a packfile", packfile);
678 header.dirofs = LittleLong (header.dirofs);
679 header.dirlen = LittleLong (header.dirlen);
681 if (header.dirlen % sizeof(dpackfile_t))
682 Sys_Error ("%s has an invalid directory size", packfile);
684 numpackfiles = header.dirlen / sizeof(dpackfile_t);
686 if (numpackfiles > MAX_FILES_IN_PACK)
687 Sys_Error ("%s has %i files", packfile, numpackfiles);
689 pack = Mem_Alloc(pak_mempool, sizeof (pack_t));
690 pack->ignorecase = false; // PAK is case sensitive
691 strlcpy (pack->filename, packfile, sizeof (pack->filename));
692 pack->handle = packhandle;
693 pack->numfiles = numpackfiles;
694 pack->mempool = Mem_AllocPool(packfile);
695 pack->files = Mem_Alloc(pack->mempool, numpackfiles * sizeof(packfile_t));
696 pack->next = packlist;
699 info = Mem_Alloc(tempmempool, sizeof(*info) * numpackfiles);
700 fseek (packhandle, header.dirofs, SEEK_SET);
701 fread ((void *)info, 1, header.dirlen, packhandle);
703 // parse the directory
704 for (i = 0;i < numpackfiles;i++)
707 packfile_t *file = &pack->files[i];
709 strlcpy (file->name, info[i].name, sizeof (file->name));
710 file->offset = LittleLong(info[i].filepos);
711 size = LittleLong (info[i].filelen);
712 file->packsize = size;
713 file->realsize = size;
714 file->flags = FILE_FLAG_TRUEOFFS;
719 Con_Printf ("Added packfile %s (%i files)\n", packfile, numpackfiles);
728 Sets fs_gamedir, adds the directory to the head of the path,
729 then loads and adds pak1.pak pak2.pak ...
732 void FS_AddGameDirectory (char *dir)
734 stringlist_t *list, *current;
735 searchpath_t *search;
737 char pakfile[MAX_OSPATH];
739 strlcpy (fs_gamedir, dir, sizeof (fs_gamedir));
741 // add the directory to the search path
742 search = Mem_Alloc(pak_mempool, sizeof(searchpath_t));
743 strlcpy (search->filename, dir, sizeof (search->filename));
744 search->next = fs_searchpaths;
745 fs_searchpaths = search;
747 list = listdirectory(dir);
749 // add any PAK package in the directory
750 for (current = list;current;current = current->next)
752 if (matchpattern(current->text, "*.pak", true))
754 sprintf (pakfile, "%s/%s", dir, current->text);
755 pak = FS_LoadPackPAK (pakfile);
758 search = Mem_Alloc(pak_mempool, sizeof(searchpath_t));
760 search->next = fs_searchpaths;
761 fs_searchpaths = search;
764 Con_Printf("unable to load pak \"%s\"\n", pakfile);
768 // add any PK3 package in the director
769 for (current = list;current;current = current->next)
771 if (matchpattern(current->text, "*.pk3", true))
773 sprintf (pakfile, "%s/%s", dir, current->text);
774 pak = FS_LoadPackPK3 (pakfile);
777 search = Mem_Alloc(pak_mempool, sizeof(searchpath_t));
779 search->next = fs_searchpaths;
780 fs_searchpaths = search;
783 Con_Printf("unable to load pak \"%s\"\n", pakfile);
795 char *FS_FileExtension (const char *in)
797 static char exten[8];
798 const char *slash, *backslash, *colon, *dot, *separator;
801 slash = strrchr(in, '/');
802 backslash = strrchr(in, '\\');
803 colon = strrchr(in, ':');
804 dot = strrchr(in, '.');
806 if (separator < backslash)
807 separator = backslash;
808 if (separator < colon)
813 for (i = 0;i < 7 && dot[i];i++)
828 searchpath_t *search;
830 fs_mempool = Mem_AllocPool("file management");
831 pak_mempool = Mem_AllocPool("paks");
833 Cmd_AddCommand ("path", FS_Path_f);
835 strcpy(fs_basedir, ".");
840 // Overrides the system supplied base directory (under GAMENAME)
841 i = COM_CheckParm ("-basedir");
842 if (i && i < com_argc-1)
843 strlcpy (fs_basedir, com_argv[i+1], sizeof (fs_basedir));
845 i = strlen (fs_basedir);
846 if (i > 0 && (fs_basedir[i-1] == '\\' || fs_basedir[i-1] == '/'))
849 // start up with GAMENAME by default (id1)
850 strlcpy (com_modname, GAMENAME, sizeof (com_modname));
851 FS_AddGameDirectory (va("%s/"GAMENAME, fs_basedir));
855 strlcpy (com_modname, gamedirname, sizeof (com_modname));
856 FS_AddGameDirectory (va("%s/%s", fs_basedir, gamedirname));
860 // Adds basedir/gamedir as an override game
861 i = COM_CheckParm ("-game");
862 if (i && i < com_argc-1)
865 strlcpy (com_modname, com_argv[i+1], sizeof (com_modname));
866 FS_AddGameDirectory (va("%s/%s", fs_basedir, com_argv[i+1]));
869 // -path <dir or packfile> [<dir or packfile>] ...
870 // Fully specifies the exact search path, overriding the generated one
871 i = COM_CheckParm ("-path");
875 fs_searchpaths = NULL;
876 while (++i < com_argc)
878 if (!com_argv[i] || com_argv[i][0] == '+' || com_argv[i][0] == '-')
881 search = Mem_Alloc(pak_mempool, sizeof(searchpath_t));
882 if (!strcasecmp (FS_FileExtension(com_argv[i]), "pak"))
884 search->pack = FS_LoadPackPAK (com_argv[i]);
886 Sys_Error ("Couldn't load packfile: %s", com_argv[i]);
888 else if (!strcasecmp (FS_FileExtension (com_argv[i]), "pk3"))
890 search->pack = FS_LoadPackPK3 (com_argv[i]);
892 Sys_Error ("Couldn't load packfile: %s", com_argv[i]);
895 strlcpy (search->filename, com_argv[i], sizeof (search->filename));
896 search->next = fs_searchpaths;
897 fs_searchpaths = search;
907 Internal function used to create a qfile_t and open the relevant file on disk
910 static qfile_t* FS_SysOpen (const char* filepath, const char* mode)
914 file = Mem_Alloc (fs_mempool, sizeof (*file));
915 memset (file, 0, sizeof (*file));
917 file->stream = fopen (filepath, mode);
933 qfile_t *FS_OpenRead (const char *path, int offs, int len)
937 file = FS_SysOpen (path, "rb");
940 Sys_Error ("Couldn't open %s", path);
945 if (offs < 0 || len < 0)
947 // We set fs_filesize here for normal files
948 fseek (file->stream, 0, SEEK_END);
949 fs_filesize = ftell (file->stream);
950 fseek (file->stream, 0, SEEK_SET);
955 fseek (file->stream, offs, SEEK_SET);
957 file->flags |= FS_FLAG_PACKED;
970 If the requested file is inside a packfile, a new qfile_t* will be opened
976 qfile_t *FS_FOpenFile (const char *filename, qboolean quiet)
978 searchpath_t *search;
979 char netpath[MAX_OSPATH];
981 int i, filenamelen, matched;
983 filenamelen = strlen (filename);
985 // search through the path, one element at a time
986 search = fs_searchpaths;
988 for ( ; search ; search = search->next)
990 // is the element a pak file?
993 // look through all the pak file elements
995 for (i=0 ; i<pak->numfiles ; i++)
998 matched = !strcasecmp (pak->files[i].name, filename);
1000 matched = !strcmp (pak->files[i].name, filename);
1001 if (matched) // found it?
1006 Sys_Printf ("PackFile: %s : %s\n",pak->filename, pak->files[i].name);
1008 // If we don't have the true offset, get it now
1009 if (! (pak->files[i].flags & FILE_FLAG_TRUEOFFS))
1010 PK3_GetTrueFileOffset (&pak->files[i], pak);
1012 // No Zlib DLL = no compressed files
1013 if (!zlib_dll && (pak->files[i].flags & FILE_FLAG_DEFLATED))
1015 Con_Printf ("WARNING: can't open the compressed file %s\n"
1016 "You need the Zlib DLL to use compressed files\n", filename);
1021 // open a new file in the pakfile
1022 file = FS_OpenRead (pak->filename, pak->files[i].offset, pak->files[i].packsize);
1023 fs_filesize = pak->files[i].realsize;
1025 if (pak->files[i].flags & FILE_FLAG_DEFLATED)
1029 file->flags |= FS_FLAG_DEFLATED;
1031 // We need some more variables
1032 ztk = Mem_Alloc (fs_mempool, sizeof (*file->z));
1034 ztk->real_length = pak->files[i].realsize;
1036 // Initialize zlib stream
1037 ztk->zstream.next_in = ztk->input;
1038 ztk->zstream.avail_in = 0;
1040 /* From Zlib's "unzip.c":
1042 * windowBits is passed < 0 to tell that there is no zlib header.
1043 * Note that in this case inflate *requires* an extra "dummy" byte
1044 * after the compressed stream in order to complete decompression and
1045 * return Z_STREAM_END.
1046 * In unzip, i don't wait absolutely Z_STREAM_END because I known the
1047 * size of both compressed and uncompressed data
1049 if (qz_inflateInit2 (&ztk->zstream, -MAX_WBITS) != Z_OK)
1050 Sys_Error ("inflate init error (file: %s)", filename);
1052 ztk->zstream.next_out = ztk->output;
1053 ztk->zstream.avail_out = sizeof (ztk->output);
1064 sprintf (netpath, "%s/%s",search->filename, filename);
1066 if (!FS_SysFileExists (netpath))
1070 Sys_Printf ("FindFile: %s\n",netpath);
1071 return FS_OpenRead (netpath, -1, -1);
1076 Sys_Printf ("FindFile: can't find %s\n", filename);
1084 =============================================================================
1086 MAIN PUBLIC FUNCTIONS
1088 =============================================================================
1092 ====================
1095 Open a file. The syntax is the same as fopen
1096 ====================
1098 qfile_t* FS_Open (const char* filepath, const char* mode, qboolean quiet)
1100 // If the file is opened in "write" or "append" mode
1101 if (strchr (mode, 'w') || strchr (mode, 'a'))
1103 char real_path [MAX_OSPATH];
1105 // Open the file on disk directly
1106 snprintf (real_path, sizeof (real_path), "%s/%s", fs_gamedir, filepath);
1108 // Create directories up to the file
1109 FS_CreatePath (real_path);
1111 return FS_SysOpen (real_path, mode);
1114 // Else, we look at the various search paths
1115 return FS_FOpenFile (filepath, quiet);
1120 ====================
1124 ====================
1126 int FS_Close (qfile_t* file)
1128 if (fclose (file->stream))
1133 qz_inflateEnd (&file->z->zstream);
1143 ====================
1146 Write "datasize" bytes into a file
1147 ====================
1149 size_t FS_Write (qfile_t* file, const void* data, size_t datasize)
1151 return fwrite (data, 1, datasize, file->stream);
1156 ====================
1159 Read up to "buffersize" bytes from a file
1160 ====================
1162 size_t FS_Read (qfile_t* file, void* buffer, size_t buffersize)
1167 // Quick path for unpacked files
1168 if (! (file->flags & FS_FLAG_PACKED))
1169 return fread (buffer, 1, buffersize, file->stream);
1171 // If the file isn't compressed
1172 if (! (file->flags & FS_FLAG_DEFLATED))
1174 // We must take care to not read after the end of the file
1175 count = file->length - file->position;
1176 if (buffersize > count)
1179 nb = fread (buffer, 1, buffersize, file->stream);
1181 file->position += nb;
1185 // If the file is compressed, it's more complicated...
1188 // First, we copy as many bytes as we can from "output"
1189 if (ztk->out_ind < ztk->out_max)
1191 count = ztk->out_max - ztk->out_ind;
1193 nb = (buffersize > count) ? count : buffersize;
1194 memcpy (buffer, &ztk->output[ztk->out_ind], nb);
1196 file->position += nb;
1201 // We cycle through a few operations until we have inflated enough data
1202 while (nb < buffersize)
1204 // NOTE: at this point, "output" should always be empty
1206 // If "input" is also empty, we need to fill it
1207 if (ztk->in_ind == ztk->in_max)
1209 size_t remain = file->length - ztk->in_position;
1211 // If we are at the end of the file
1215 count = (remain > sizeof (ztk->input)) ? sizeof (ztk->input) : remain;
1216 fread (ztk->input, 1, count, file->stream);
1218 // Update indexes and counters
1220 ztk->in_max = count;
1221 ztk->in_position += count;
1224 // Now that we are sure we have compressed data available, we need to determine
1225 // if it's better to inflate it in "output" or directly in "buffer" (we are in this
1226 // case if we still need more bytes than "output" can contain)
1228 ztk->zstream.next_in = &ztk->input[ztk->in_ind];
1229 ztk->zstream.avail_in = ztk->in_max - ztk->in_ind;
1231 // If output will be able to contain at least 1 more byte than the data we need
1232 if (buffersize - nb < sizeof (ztk->output))
1236 // Inflate the data in "output"
1237 ztk->zstream.next_out = ztk->output;
1238 ztk->zstream.avail_out = sizeof (ztk->output);
1239 error = qz_inflate (&ztk->zstream, Z_SYNC_FLUSH);
1240 if (error != Z_OK && error != Z_STREAM_END)
1241 Sys_Error ("Can't inflate file");
1242 ztk->in_ind = ztk->in_max - ztk->zstream.avail_in;
1243 ztk->out_max = sizeof (ztk->output) - ztk->zstream.avail_out;
1244 ztk->out_position += ztk->out_max;
1246 // Copy the requested data in "buffer" (as much as we can)
1247 count = (buffersize - nb > ztk->out_max) ? ztk->out_max : buffersize - nb;
1248 memcpy (&((qbyte*)buffer)[nb], ztk->output, count);
1249 ztk->out_ind = count;
1252 // Else, we inflate directly in "buffer"
1257 // Inflate the data in "buffer"
1258 ztk->zstream.next_out = &((qbyte*)buffer)[nb];
1259 ztk->zstream.avail_out = buffersize - nb;
1260 error = qz_inflate (&ztk->zstream, Z_SYNC_FLUSH);
1261 if (error != Z_OK && error != Z_STREAM_END)
1262 Sys_Error ("Can't inflate file");
1263 ztk->in_ind = ztk->in_max - ztk->zstream.avail_in;
1265 // Invalidate the output data (for FS_Seek)
1269 // How much data did it inflate?
1270 count = buffersize - nb - ztk->zstream.avail_out;
1271 ztk->out_position += count;
1275 file->position += count;
1283 ====================
1286 Flush the file output stream
1287 ====================
1289 int FS_Flush (qfile_t* file)
1291 return fflush (file->stream);
1296 ====================
1299 Print a string into a file
1300 ====================
1302 int FS_Printf (qfile_t* file, const char* format, ...)
1307 va_start (args, format);
1308 result = vfprintf (file->stream, format, args);
1316 ====================
1319 Get the next character of a file
1320 ====================
1322 int FS_Getc (qfile_t* file)
1326 if (FS_Read (file, &c, 1) != 1)
1334 ====================
1337 Move the position index in a file
1338 ====================
1340 int FS_Seek (qfile_t* file, long offset, int whence)
1342 // Quick path for unpacked files
1343 if (! (file->flags & FS_FLAG_PACKED))
1344 return fseek (file->stream, offset, whence);
1346 // Seeking in compressed files is more a hack than anything else,
1347 // but we need to support it, so here it is.
1348 if (file->flags & FS_FLAG_DEFLATED)
1350 ztoolkit_t *ztk = file->z;
1351 qbyte buffer [sizeof (ztk->output)]; // it's big to force inflating into buffer directly
1356 offset += file->position;
1363 offset += ztk->real_length;
1369 if (offset < 0 || offset > (long) ztk->real_length)
1372 // If we need to go back in the file
1373 if (offset <= (long) file->position)
1375 // If we still have the data we need in the output buffer
1376 if (file->position - offset <= ztk->out_ind)
1378 ztk->out_ind -= file->position - offset;
1379 file->position = offset;
1383 // Else, we restart from the beginning of the file
1386 ztk->in_position = 0;
1389 ztk->out_position = 0;
1391 fseek (file->stream, file->offset, SEEK_SET);
1393 // Reset the Zlib stream
1394 ztk->zstream.next_in = ztk->input;
1395 ztk->zstream.avail_in = 0;
1396 qz_inflateReset (&ztk->zstream);
1399 // Skip all data until we reach the requested offset
1400 while ((long) file->position < offset)
1402 size_t diff = offset - file->position;
1405 count = (diff > sizeof (buffer)) ? sizeof (buffer) : diff;
1406 len = FS_Read (file, buffer, count);
1414 // Packed files receive a special treatment too, because
1415 // we need to make sure it doesn't go outside of the file
1419 offset += file->position;
1426 offset += file->length;
1432 if (offset < 0 || offset > (long) file->length)
1435 if (fseek (file->stream, file->offset + offset, SEEK_SET) == -1)
1437 file->position = offset;
1443 ====================
1446 Give the current position in a file
1447 ====================
1449 long FS_Tell (qfile_t* file)
1451 if (file->flags & FS_FLAG_PACKED)
1452 return file->position;
1454 return ftell (file->stream);
1459 ====================
1462 Extract a line from a file
1463 ====================
1465 char* FS_Gets (qfile_t* file, char* buffer, int buffersize)
1469 // Quick path for unpacked files
1470 if (! (file->flags & FS_FLAG_PACKED))
1471 return fgets (buffer, buffersize, file->stream);
1473 for (ind = 0; ind < (size_t) buffersize - 1; ind++)
1475 int c = FS_Getc (file);
1490 buffer[ind + 1] = '\0';
1499 buffer[buffersize - 1] = '\0';
1508 Dynamic length version of fgets. DO NOT free the buffer.
1511 char *FS_Getline (qfile_t *file)
1513 static int size = 256;
1514 static char *buf = 0;
1519 buf = Mem_Alloc (fs_mempool, size);
1521 if (!FS_Gets (file, buf, size))
1525 while (buf[len - 1] != '\n' && buf[len - 1] != '\r')
1527 t = Mem_Alloc (fs_mempool, size + 256);
1528 memcpy(t, buf, size);
1532 if (!FS_Gets (file, buf + len, size - len))
1536 while ((len = strlen(buf)) && (buf[len - 1] == '\n' || buf[len - 1] == '\r'))
1543 ====================
1546 Extract a line from a file
1547 ====================
1549 int FS_Eof (qfile_t* file)
1551 if (file->flags & FS_FLAG_PACKED)
1553 if (file->flags & FS_FLAG_DEFLATED)
1554 return (file->position == file->z->real_length);
1556 return (file->position == file->length);
1559 return feof (file->stream);
1567 Filename are relative to the quake directory.
1568 Always appends a 0 byte.
1571 qbyte *FS_LoadFile (const char *path, qboolean quiet)
1576 // look for it in the filesystem or pack files
1577 h = FS_Open (path, "rb", quiet);
1581 buf = Mem_Alloc(tempmempool, fs_filesize+1);
1583 Sys_Error ("FS_LoadFile: not enough available memory for %s (size %i)", path, fs_filesize);
1585 ((qbyte *)buf)[fs_filesize] = 0;
1587 FS_Read (h, buf, fs_filesize);
1598 The filename will be prefixed by the current game directory
1601 qboolean FS_WriteFile (const char *filename, void *data, int len)
1604 char name[MAX_OSPATH];
1606 sprintf (name, "%s/%s", fs_gamedir, filename);
1608 // Create directories up to the file
1609 FS_CreatePath (name);
1611 handle = fopen (name, "wb");
1614 Con_Printf ("FS_WriteFile: failed on %s\n", name);
1618 Con_DPrintf ("FS_WriteFile: %s\n", name);
1619 fwrite (data, 1, len, handle);
1626 =============================================================================
1628 OTHERS PUBLIC FUNCTIONS
1630 =============================================================================
1638 void FS_StripExtension (const char *in, char *out)
1645 else if (*in == '/' || *in == '\\' || *in == ':')
1661 void FS_DefaultExtension (char *path, const char *extension, size_t size_path)
1665 // if path doesn't have a .EXT, append extension
1666 // (extension should include the .)
1667 src = path + strlen(path) - 1;
1669 while (*src != '/' && src != path)
1672 return; // it has an extension
1676 strlcat (path, extension, size_path);
1680 qboolean FS_FileExists (const char *filename)
1682 searchpath_t *search;
1683 char netpath[MAX_OSPATH];
1687 for (search = fs_searchpaths;search;search = search->next)
1692 for (i = 0;i < pak->numfiles;i++)
1693 if (!strcmp (pak->files[i].name, filename))
1698 sprintf (netpath, "%s/%s",search->filename, filename);
1699 if (FS_SysFileExists (netpath))
1708 qboolean FS_SysFileExists (const char *path)
1713 f = fopen (path, "rb");
1724 if (stat (path,&buf) == -1)
1731 void FS_mkdir (const char *path)