]> de.git.xonotic.org Git - xonotic/darkplaces.git/blobdiff - fs.c
changed most Sys_Error calls to Con_Printf with appropriate error returns
[xonotic/darkplaces.git] / fs.c
diff --git a/fs.c b/fs.c
index c6742d390f527d0ac44c2ac2d3f4346d036b3497..930a694a8d8f9496260a9166955d01f97fde5d3c 100644 (file)
--- a/fs.c
+++ b/fs.c
@@ -218,7 +218,6 @@ typedef struct pack_s
        int ignorecase;  // PK3 ignores case
        int numfiles;
        packfile_t *files;
-       mempool_t *mempool;
        struct pack_s *next;
 } pack_t;
 
@@ -258,7 +257,6 @@ VARIABLES
 */
 
 mempool_t *fs_mempool;
-mempool_t *pak_mempool;
 
 int fs_filesize;
 
@@ -541,33 +539,49 @@ pack_t *FS_LoadPackPK3 (const char *packfile)
                return NULL;
 
        if (! PK3_GetEndOfCentralDir (packfile, packhandle, &eocd))
-               Sys_Error ("%s is not a PK3 file", packfile);
+       {
+               Con_Printf ("%s is not a PK3 file", packfile);
+               close(packhandle);
+               return NULL;
+       }
 
        // Multi-volume ZIP archives are NOT allowed
        if (eocd.disknum != 0 || eocd.cdir_disknum != 0)
-               Sys_Error ("%s is a multi-volume ZIP archive", packfile);
+       {
+               Con_Printf ("%s is a multi-volume ZIP archive", packfile);
+               close(packhandle);
+               return NULL;
+       }
 
        // We only need to do this test if MAX_FILES_IN_PACK is lesser than 65535
        // since eocd.nbentries is an unsigned 16 bits integer
 #if MAX_FILES_IN_PACK < 65535
        if (eocd.nbentries > MAX_FILES_IN_PACK)
-               Sys_Error ("%s contains too many files (%hu)", packfile, eocd.nbentries);
+       {
+               Con_Printf ("%s contains too many files (%hu)", packfile, eocd.nbentries);
+               close(packhandle);
+               return NULL;
+       }
 #endif
 
        // Create a package structure in memory
-       pack = Mem_Alloc (pak_mempool, sizeof (pack_t));
+       pack = Mem_Alloc(fs_mempool, sizeof (pack_t));
        pack->ignorecase = true; // PK3 ignores case
        strlcpy (pack->filename, packfile, sizeof (pack->filename));
        pack->handle = packhandle;
        pack->numfiles = eocd.nbentries;
-       pack->mempool = Mem_AllocPool (packfile, 0, NULL);
-       pack->files = Mem_Alloc (pack->mempool, eocd.nbentries * sizeof(packfile_t));
+       pack->files = Mem_Alloc(fs_mempool, eocd.nbentries * sizeof(packfile_t));
        pack->next = packlist;
        packlist = pack;
 
        real_nb_files = PK3_BuildFileList (pack, &eocd);
        if (real_nb_files < 0)
-               Sys_Error ("%s is not a valid PK3 file", packfile);
+       {
+               Con_Printf ("%s is not a valid PK3 file", packfile);
+               close(pack->handle);
+               Mem_Free(pack);
+               return NULL;
+       }
 
        Con_Printf("Added packfile %s (%i files)\n", packfile, real_nb_files);
        return pack;
@@ -581,25 +595,29 @@ PK3_GetTrueFileOffset
 Find where the true file data offset is
 ====================
 */
-void PK3_GetTrueFileOffset (packfile_t *pfile, pack_t *pack)
+qboolean PK3_GetTrueFileOffset (packfile_t *pfile, pack_t *pack)
 {
        qbyte buffer [ZIP_LOCAL_CHUNK_BASE_SIZE];
        size_t count;
 
        // Already found?
        if (pfile->flags & PACKFILE_FLAG_TRUEOFFS)
-               return;
+               return true;
 
        // Load the local file description
        lseek (pack->handle, pfile->offset, SEEK_SET);
        count = read (pack->handle, buffer, ZIP_LOCAL_CHUNK_BASE_SIZE);
        if (count != ZIP_LOCAL_CHUNK_BASE_SIZE || BuffBigLong (buffer) != ZIP_DATA_HEADER)
-               Sys_Error ("Can't retrieve file %s in package %s", pfile->name, pack->filename);
+       {
+               Con_Printf ("Can't retrieve file %s in package %s", pfile->name, pack->filename);
+               return false;
+       }
 
        // Skip name and extra field
        pfile->offset += BuffLittleShort (&buffer[26]) + BuffLittleShort (&buffer[28]) + ZIP_LOCAL_CHUNK_BASE_SIZE;
 
        pfile->flags |= PACKFILE_FLAG_TRUEOFFS;
+       return true;
 }
 
 
@@ -641,8 +659,7 @@ static packfile_t* FS_AddFileToPack (const char* name, pack_t* pack,
 
                // If we found the file, there's a problem
                if (!diff)
-                       Sys_Error ("Package %s contains the file %s several times\n",
-                                          pack->filename, name);
+                       Con_Printf ("Package %s contains the file %s several times\n", pack->filename, name);
 
                // If we're too far in the list
                if (diff > 0)
@@ -705,9 +722,7 @@ void FS_Path_f (void)
        for (s=fs_searchpaths ; s ; s=s->next)
        {
                if (s->pack)
-               {
                        Con_Printf("%s (%i files)\n", s->pack->filename, s->pack->numfiles);
-               }
                else
                        Con_Printf("%s\n", s->filename);
        }
@@ -737,25 +752,36 @@ pack_t *FS_LoadPackPAK (const char *packfile)
                return NULL;
        read (packhandle, (void *)&header, sizeof(header));
        if (memcmp(header.id, "PACK", 4))
-               Sys_Error ("%s is not a packfile", packfile);
+       {
+               Con_Printf ("%s is not a packfile", packfile);
+               close(packhandle);
+               return NULL;
+       }
        header.dirofs = LittleLong (header.dirofs);
        header.dirlen = LittleLong (header.dirlen);
 
        if (header.dirlen % sizeof(dpackfile_t))
-               Sys_Error ("%s has an invalid directory size", packfile);
+       {
+               Con_Printf ("%s has an invalid directory size", packfile);
+               close(packhandle);
+               return NULL;
+       }
 
        numpackfiles = header.dirlen / sizeof(dpackfile_t);
 
        if (numpackfiles > MAX_FILES_IN_PACK)
-               Sys_Error ("%s has %i files", packfile, numpackfiles);
+       {
+               Con_Printf ("%s has %i files", packfile, numpackfiles);
+               close(packhandle);
+               return NULL;
+       }
 
-       pack = Mem_Alloc(pak_mempool, sizeof (pack_t));
+       pack = Mem_Alloc(fs_mempool, sizeof (pack_t));
        pack->ignorecase = false; // PAK is case sensitive
        strlcpy (pack->filename, packfile, sizeof (pack->filename));
        pack->handle = packhandle;
        pack->numfiles = 0;
-       pack->mempool = Mem_AllocPool(packfile, 0, NULL);
-       pack->files = Mem_Alloc(pack->mempool, numpackfiles * sizeof(packfile_t));
+       pack->files = Mem_Alloc(fs_mempool, numpackfiles * sizeof(packfile_t));
        pack->next = packlist;
        packlist = pack;
 
@@ -803,11 +829,11 @@ void FS_AddGameDirectory (const char *dir)
        {
                if (matchpattern(current->text, "*.pak", true))
                {
-                       snprintf (pakfile, sizeof (pakfile), "%s/%s", dir, current->text);
+                       dpsnprintf (pakfile, sizeof (pakfile), "%s%s", dir, current->text);
                        pak = FS_LoadPackPAK (pakfile);
                        if (pak)
                        {
-                               search = Mem_Alloc(pak_mempool, sizeof(searchpath_t));
+                               search = Mem_Alloc(fs_mempool, sizeof(searchpath_t));
                                search->pack = pak;
                                search->next = fs_searchpaths;
                                fs_searchpaths = search;
@@ -822,11 +848,11 @@ void FS_AddGameDirectory (const char *dir)
        {
                if (matchpattern(current->text, "*.pk3", true))
                {
-                       snprintf (pakfile, sizeof (pakfile), "%s/%s", dir, current->text);
+                       dpsnprintf (pakfile, sizeof (pakfile), "%s%s", dir, current->text);
                        pak = FS_LoadPackPK3 (pakfile);
                        if (pak)
                        {
-                               search = Mem_Alloc(pak_mempool, sizeof(searchpath_t));
+                               search = Mem_Alloc(fs_mempool, sizeof(searchpath_t));
                                search->pack = pak;
                                search->next = fs_searchpaths;
                                fs_searchpaths = search;
@@ -839,7 +865,7 @@ void FS_AddGameDirectory (const char *dir)
 
        // Add the directory to the search path
        // (unpacked files have the priority over packed files)
-       search = Mem_Alloc(pak_mempool, sizeof(searchpath_t));
+       search = Mem_Alloc(fs_mempool, sizeof(searchpath_t));
        strlcpy (search->filename, dir, sizeof (search->filename));
        search->next = fs_searchpaths;
        fs_searchpaths = search;
@@ -853,17 +879,19 @@ FS_AddGameHierarchy
 */
 void FS_AddGameHierarchy (const char *dir)
 {
+#ifndef WIN32
        const char *homedir;
-
-       strlcpy (com_modname, dir, sizeof (com_modname));
+#endif
 
        // Add the common game directory
-       FS_AddGameDirectory (va("%s/%s", fs_basedir, dir));
+       FS_AddGameDirectory (va("%s/%s/", fs_basedir, dir));
 
+#ifndef WIN32
        // Add the personal game directory
        homedir = getenv ("HOME");
        if (homedir != NULL && homedir[0] != '\0')
-               FS_AddGameDirectory (va("%s/.%s/%s", homedir, gameuserdirname, dir));
+               FS_AddGameDirectory (va("%s/.%s/%s/", homedir, gameuserdirname, dir));
+#endif
 }
 
 
@@ -903,16 +931,23 @@ void FS_Init (void)
        searchpath_t *search;
 
        fs_mempool = Mem_AllocPool("file management", 0, NULL);
-       pak_mempool = Mem_AllocPool("paks", 0, NULL);
-
-       Cvar_RegisterVariable (&scr_screenshot_name);
-
-       Cmd_AddCommand ("path", FS_Path_f);
-       Cmd_AddCommand ("dir", FS_Dir_f);
-       Cmd_AddCommand ("ls", FS_Ls_f);
 
        strcpy(fs_basedir, ".");
-       strcpy(fs_gamedir, ".");
+       strcpy(fs_gamedir, "");
+
+#ifdef MACOSX
+       // FIXME: is there a better way to find the directory outside the .app?
+       if (strstr(com_argv[0], ".app/"))
+       {
+               char *split;
+               char temp[4096];
+               split = strstr(com_argv[0], ".app/");
+               while (split > com_argv[0] && *split != '/')
+                       split--;
+               strlcpy(fs_basedir, com_argv[0], sizeof(fs_basedir));
+               fs_basedir[split - com_argv[0]] = 0;
+       }
+#endif
 
        PK3_OpenLibrary ();
 
@@ -940,18 +975,26 @@ void FS_Init (void)
                        if (!com_argv[i] || com_argv[i][0] == '+' || com_argv[i][0] == '-')
                                break;
 
-                       search = Mem_Alloc(pak_mempool, sizeof(searchpath_t));
+                       search = Mem_Alloc(fs_mempool, sizeof(searchpath_t));
                        if (!strcasecmp (FS_FileExtension(com_argv[i]), "pak"))
                        {
                                search->pack = FS_LoadPackPAK (com_argv[i]);
                                if (!search->pack)
-                                       Sys_Error ("Couldn't load packfile: %s", com_argv[i]);
+                               {
+                                       Con_Printf ("Couldn't load packfile: %s", com_argv[i]);
+                                       Mem_Free(search);
+                                       continue;
+                               }
                        }
                        else if (!strcasecmp (FS_FileExtension (com_argv[i]), "pk3"))
                        {
                                search->pack = FS_LoadPackPK3 (com_argv[i]);
                                if (!search->pack)
-                                       Sys_Error ("Couldn't load packfile: %s", com_argv[i]);
+                               {
+                                       Con_Printf ("Couldn't load packfile: %s", com_argv[i]);
+                                       Mem_Free(search);
+                                       continue;
+                               }
                        }
                        else
                                strlcpy (search->filename, com_argv[i], sizeof (search->filename));
@@ -964,7 +1007,6 @@ void FS_Init (void)
        // add the game-specific paths
        // gamedirname1 (typically id1)
        FS_AddGameHierarchy (gamedirname1);
-       Cvar_SetQuick (&scr_screenshot_name, gamescreenshotname);
 
        // add the game-specific path, if any
        if (gamedirname2)
@@ -973,6 +1015,9 @@ void FS_Init (void)
                FS_AddGameHierarchy (gamedirname2);
        }
 
+       // set the com_modname (reported in server info)
+       strlcpy(com_modname, gamedirname1, sizeof(com_modname));
+
        // -game <gamedir>
        // Adds basedir/gamedir as an override game
        // LordHavoc: now supports multiple -game directories
@@ -985,7 +1030,8 @@ void FS_Init (void)
                        i++;
                        fs_modified = true;
                        FS_AddGameHierarchy (com_argv[i]);
-                       Cvar_SetQuick (&scr_screenshot_name, com_modname);
+                       // update the com_modname
+                       strlcpy (com_modname, com_argv[i], sizeof (com_modname));
                }
        }
 
@@ -994,6 +1040,22 @@ void FS_Init (void)
                unlink (va("%s/qconsole.log", fs_gamedir));
 }
 
+void FS_Init_Commands(void)
+{
+       Cvar_RegisterVariable (&scr_screenshot_name);
+
+       Cmd_AddCommand ("path", FS_Path_f);
+       Cmd_AddCommand ("dir", FS_Dir_f);
+       Cmd_AddCommand ("ls", FS_Ls_f);
+
+       // set the default screenshot name to either the mod name or the
+       // gamemode screenshot name
+       if (fs_modified)
+               Cvar_SetQuick (&scr_screenshot_name, com_modname);
+       else
+               Cvar_SetQuick (&scr_screenshot_name, gamescreenshotname);
+}
+
 /*
 ================
 FS_Shutdown
@@ -1001,7 +1063,6 @@ FS_Shutdown
 */
 void FS_Shutdown (void)
 {
-       Mem_FreePool (&pak_mempool);
        Mem_FreePool (&fs_mempool);
 }
 
@@ -1012,7 +1073,7 @@ FS_SysOpen
 Internal function used to create a qfile_t and open the relevant non-packed file on disk
 ====================
 */
-static qfile_t* FS_SysOpen (const char* filepath, const char* mode)
+static qfile_t* FS_SysOpen (const char* filepath, const char* mode, qboolean nonblocking)
 {
        qfile_t* file;
        int mod, opt;
@@ -1053,6 +1114,11 @@ static qfile_t* FS_SysOpen (const char* filepath, const char* mode)
                }
        }
 
+#ifndef WIN32
+       if (nonblocking)
+               opt |= O_NONBLOCK;
+#endif
+
        file = Mem_Alloc (fs_mempool, sizeof (*file));
        memset (file, 0, sizeof (*file));
        file->ungetc = EOF;
@@ -1064,12 +1130,13 @@ static qfile_t* FS_SysOpen (const char* filepath, const char* mode)
                return NULL;
        }
 
-       // For files opened in read mode, we now need to get the length
-       if (mod == O_RDONLY)
-       {
-               file->real_length = lseek (file->handle, 0, SEEK_END);
+       file->real_length = lseek (file->handle, 0, SEEK_END);
+
+       // For files opened in append mode, we start at the end of the file
+       if (mod & O_APPEND)
+               file->position = file->real_length;
+       else
                lseek (file->handle, 0, SEEK_SET);
-       }
 
        return file;
 }
@@ -1090,9 +1157,12 @@ qfile_t *FS_OpenPackedFile (pack_t* pack, int pack_ind)
 
        pfile = &pack->files[pack_ind];
 
+       fs_filesize = -1;
+
        // If we don't have the true offset, get it now
        if (! (pfile->flags & PACKFILE_FLAG_TRUEOFFS))
-               PK3_GetTrueFileOffset (pfile, pack);
+               if (!PK3_GetTrueFileOffset (pfile, pack))
+                       return NULL;
 
        // No Zlib DLL = no compressed files
        if (!zlib_dll && (pfile->flags & PACKFILE_FLAG_DEFLATED))
@@ -1100,13 +1170,24 @@ qfile_t *FS_OpenPackedFile (pack_t* pack, int pack_ind)
                Con_Printf("WARNING: can't open the compressed file %s\n"
                                        "You need the Zlib DLL to use compressed files\n",
                                        pfile->name);
-               fs_filesize = -1;
+               return NULL;
+       }
+
+       // LordHavoc: lseek affects all duplicates of a handle so we do it before
+       // the dup() call to avoid having to close the dup_handle on error here
+       if (lseek (pack->handle, pfile->offset, SEEK_SET) == -1)
+       {
+               Con_Printf ("FS_OpenPackedFile: can't lseek to %s in %s (offset: %d)",
+                                       pfile->name, pack->filename, pfile->offset);
                return NULL;
        }
 
        dup_handle = dup (pack->handle);
        if (dup_handle < 0)
-               Sys_Error ("FS_OpenPackedFile: can't dup package's handle (pack: %s)", pack->filename);
+       {
+               Con_Printf ("FS_OpenPackedFile: can't dup package's handle (pack: %s)", pack->filename);
+               return NULL;
+       }
 
        file = Mem_Alloc (fs_mempool, sizeof (*file));
        memset (file, 0, sizeof (*file));
@@ -1117,10 +1198,6 @@ qfile_t *FS_OpenPackedFile (pack_t* pack, int pack_ind)
        file->position = 0;
        file->ungetc = EOF;
 
-       if (lseek (file->handle, file->offset, SEEK_SET) == -1)
-               Sys_Error ("FS_OpenPackedFile: can't lseek to %s in %s (offset: %d)",
-                                       pfile->name, pack->filename, file->offset);
-
        if (pfile->flags & PACKFILE_FLAG_DEFLATED)
        {
                ztoolkit_t *ztk;
@@ -1146,7 +1223,12 @@ qfile_t *FS_OpenPackedFile (pack_t* pack, int pack_ind)
                 * size of both compressed and uncompressed data
                 */
                if (qz_inflateInit2 (&ztk->zstream, -MAX_WBITS) != Z_OK)
-                       Sys_Error ("FS_OpenPackedFile: inflate init error (file: %s)", pfile->name);
+               {
+                       Con_Printf ("FS_OpenPackedFile: inflate init error (file: %s)", pfile->name);
+                       close(dup_handle);
+                       Mem_Free(file);
+                       return NULL;
+               }
 
                ztk->zstream.next_out = file->buff;
                ztk->zstream.avail_out = sizeof (file->buff);
@@ -1260,7 +1342,7 @@ static searchpath_t *FS_FindFile (const char *name, int* index, qboolean quiet)
                else
                {
                        char netpath[MAX_OSPATH];
-                       snprintf(netpath, sizeof(netpath), "%s/%s", search->filename, name);
+                       dpsnprintf(netpath, sizeof(netpath), "%s%s", search->filename, name);
                        if (FS_SysFileExists (netpath))
                        {
                                if (!quiet)
@@ -1291,7 +1373,7 @@ Look for a file in the search paths and open it in read-only mode
 Sets fs_filesize
 ===========
 */
-qfile_t *FS_OpenReadFile (const char *filename, qboolean quiet)
+qfile_t *FS_OpenReadFile (const char *filename, qboolean quiet, qboolean nonblocking)
 {
        searchpath_t *search;
        int pack_ind;
@@ -1309,8 +1391,8 @@ qfile_t *FS_OpenReadFile (const char *filename, qboolean quiet)
        if (pack_ind < 0)
        {
                char path [MAX_OSPATH];
-               snprintf (path, sizeof (path), "%s/%s", search->filename, filename);
-               return FS_SysOpen (path, "rb");
+               dpsnprintf (path, sizeof (path), "%s%s", search->filename, filename);
+               return FS_SysOpen (path, "rb", nonblocking);
        }
 
        // So, we found it in a package...
@@ -1333,7 +1415,7 @@ FS_Open
 Open a file. The syntax is the same as fopen
 ====================
 */
-qfile_t* FS_Open (const char* filepath, const char* mode, qboolean quiet)
+qfile_t* FS_Open (const char* filepath, const char* mode, qboolean quiet, qboolean nonblocking)
 {
        qfile_t* file;
 
@@ -1349,16 +1431,16 @@ qfile_t* FS_Open (const char* filepath, const char* mode, qboolean quiet)
                char real_path [MAX_OSPATH];
 
                // Open the file on disk directly
-               snprintf (real_path, sizeof (real_path), "%s/%s", fs_gamedir, filepath);
+               dpsnprintf (real_path, sizeof (real_path), "%s%s", fs_gamedir, filepath);
 
                // Create directories up to the file
                FS_CreatePath (real_path);
 
-               return FS_SysOpen (real_path, mode);
+               return FS_SysOpen (real_path, mode, nonblocking);
        }
 
        // Else, we look at the various search paths and open the file in read-only mode
-       file = FS_OpenReadFile (filepath, quiet);
+       file = FS_OpenReadFile (filepath, quiet, nonblocking);
        if (file != NULL)
                fs_filesize = file->real_length;
 
@@ -1398,7 +1480,21 @@ Write "datasize" bytes into a file
 */
 size_t FS_Write (qfile_t* file, const void* data, size_t datasize)
 {
-       ssize_t result = write (file->handle, data, datasize);
+       ssize_t result;
+
+       // If necessary, seek to the exact file position we're supposed to be
+       if (file->buff_ind != file->buff_len)
+               lseek (file->handle, file->buff_ind - file->buff_len, SEEK_CUR);
+
+       // Purge cached data
+       FS_Purge (file);
+
+       // Write the buffer and update the position
+       result = write (file->handle, data, datasize);
+       file->position = lseek (file->handle, 0, SEEK_CUR);
+       if (file->real_length < file->position)
+               file->real_length = file->position;
+
        if (result < 0)
                return 0;
 
@@ -1417,12 +1513,26 @@ size_t FS_Read (qfile_t* file, void* buffer, size_t buffersize)
 {
        size_t count, done;
 
+       if (buffersize == 0)
+               return 0;
+
+       // Get rid of the ungetc character
+       if (file->ungetc != EOF)
+       {
+               ((char*)buffer)[0] = file->ungetc;
+               buffersize--;
+               file->ungetc = EOF;
+               done = 1;
+       }
+       else
+               done = 0;
+
        // First, we copy as many bytes as we can from "buff"
        if (file->buff_ind < file->buff_len)
        {
                count = file->buff_len - file->buff_ind;
 
-               done = (buffersize > count) ? count : buffersize;
+               done += (buffersize > count) ? count : buffersize;
                memcpy (buffer, &file->buff[file->buff_ind], done);
                file->buff_ind += done;
 
@@ -1430,8 +1540,6 @@ size_t FS_Read (qfile_t* file, void* buffer, size_t buffersize)
                if (buffersize == 0)
                        return done;
        }
-       else
-               done = 0;
 
        // NOTE: at this point, the read buffer is always empty
 
@@ -1455,9 +1563,8 @@ size_t FS_Read (qfile_t* file, void* buffer, size_t buffersize)
                                done += nb;
                                file->position += nb;
 
-                               // Invalidate the output data (for FS_Seek)
-                               file->buff_len = 0;
-                               file->buff_ind = 0;
+                               // Purge cached data
+                               FS_Purge (file);
                        }
                }
                else
@@ -1503,7 +1610,10 @@ size_t FS_Read (qfile_t* file, void* buffer, size_t buffersize)
                                count = sizeof (ztk->input);
                        lseek (file->handle, file->offset + ztk->in_position, SEEK_SET);
                        if (read (file->handle, ztk->input, count) != (ssize_t)count)
-                               Sys_Error ("FS_Read: unexpected end of file");
+                       {
+                               Con_Printf ("FS_Read: unexpected end of file");
+                               break;
+                       }
 
                        ztk->in_ind = 0;
                        ztk->in_len = count;
@@ -1523,7 +1633,10 @@ size_t FS_Read (qfile_t* file, void* buffer, size_t buffersize)
                        ztk->zstream.avail_out = sizeof (file->buff);
                        error = qz_inflate (&ztk->zstream, Z_SYNC_FLUSH);
                        if (error != Z_OK && error != Z_STREAM_END)
-                               Sys_Error ("Can't inflate file");
+                       {
+                               Con_Printf ("FS_Read: Can't inflate file");
+                               break;
+                       }
                        ztk->in_ind = ztk->in_len - ztk->zstream.avail_in;
 
                        file->buff_len = sizeof (file->buff) - ztk->zstream.avail_out;
@@ -1542,16 +1655,18 @@ size_t FS_Read (qfile_t* file, void* buffer, size_t buffersize)
                        ztk->zstream.avail_out = buffersize;
                        error = qz_inflate (&ztk->zstream, Z_SYNC_FLUSH);
                        if (error != Z_OK && error != Z_STREAM_END)
-                               Sys_Error ("Can't inflate file");
+                       {
+                               Con_Printf ("FS_Read: Can't inflate file");
+                               break;
+                       }
                        ztk->in_ind = ztk->in_len - ztk->zstream.avail_in;
 
                        // How much data did it inflate?
                        count = buffersize - ztk->zstream.avail_out;
                        file->position += count;
 
-                       // Invalidate the output data (for FS_Seek)
-                       file->buff_len = 0;
-                       file->buff_ind = 0;
+                       // Purge cached data
+                       FS_Purge (file);
                }
 
                done += count;
@@ -1604,19 +1719,24 @@ Print a string into a file
 int FS_VPrintf (qfile_t* file, const char* format, va_list ap)
 {
        int len;
-       char tempstring [1024];
+       size_t buff_size;
+       char *tempbuff = NULL;
 
-       len = vsnprintf (tempstring, sizeof(tempstring), format, ap);
-       if (len >= sizeof (tempstring))
+       buff_size = 1024;
+       tempbuff = Mem_Alloc (tempmempool, buff_size);
+       len = dpvsnprintf (tempbuff, buff_size, format, ap);
+       while (len < 0)
        {
-               char *temp = Mem_Alloc (tempmempool, len + 1);
-               len = vsnprintf (temp, len + 1, format, ap);
-               len = write (file->handle, temp, len);
-               Mem_Free (temp);
-               return len;
+               Mem_Free (tempbuff);
+               buff_size *= 2;
+               tempbuff = Mem_Alloc (tempmempool, buff_size);
+               len = dpvsnprintf (tempbuff, buff_size, format, ap);
        }
 
-       return write (file->handle, tempstring, len);
+       len = write (file->handle, tempbuff, len);
+       Mem_Free (tempbuff);
+
+       return len;
 }
 
 
@@ -1624,19 +1744,14 @@ int FS_VPrintf (qfile_t* file, const char* format, va_list ap)
 ====================
 FS_Getc
 
-Get stored ungetc character or the next character of a file
+Get the next character of a file
 ====================
 */
 int FS_Getc (qfile_t* file)
 {
        char c;
 
-       if (file->ungetc != EOF)
-       {
-               c = file->ungetc;
-               file->ungetc = EOF;
-       }
-       else if (FS_Read (file, &c, 1) != 1)
+       if (FS_Read (file, &c, 1) != 1)
                return EOF;
 
        return c;
@@ -1647,12 +1762,17 @@ int FS_Getc (qfile_t* file)
 ====================
 FS_UnGetc
 
-Put a character back into the Getc buffer (only supports one character!)
+Put a character back into the read buffer (only supports one character!)
 ====================
 */
-void FS_UnGetc (qfile_t* file, unsigned char c)
+int FS_UnGetc (qfile_t* file, unsigned char c)
 {
+       // If there's already a character waiting to be read
+       if (file->ungetc != EOF)
+               return EOF;
+
        file->ungetc = c;
+       return c;
 }
 
 
@@ -1697,9 +1817,8 @@ int FS_Seek (qfile_t* file, long offset, int whence)
                return 0;
        }
 
-       // Invalidate the read buffer contents
-       file->buff_ind = 0;
-       file->buff_len = 0;
+       // Purge cached data
+       FS_Purge (file);
 
        // Unpacked or uncompressed files can seek directly
        if (! (file->flags & QFILE_FLAG_DEFLATED))
@@ -1766,6 +1885,21 @@ long FS_Tell (qfile_t* file)
 }
 
 
+/*
+====================
+FS_Purge
+
+Erases any buffered input or output data
+====================
+*/
+void FS_Purge (qfile_t* file)
+{
+       file->buff_len = 0;
+       file->buff_ind = 0;
+       file->ungetc = EOF;
+}
+
+
 /*
 ============
 FS_LoadFile
@@ -1779,7 +1913,7 @@ qbyte *FS_LoadFile (const char *path, mempool_t *pool, qboolean quiet)
        qfile_t *file;
        qbyte *buf;
 
-       file = FS_Open (path, "rb", quiet);
+       file = FS_Open (path, "rb", quiet, false);
        if (!file)
                return NULL;
 
@@ -1804,7 +1938,7 @@ qboolean FS_WriteFile (const char *filename, void *data, int len)
 {
        qfile_t *file;
 
-       file = FS_Open (filename, "wb", false);
+       file = FS_Open (filename, "wb", false, false);
        if (!file)
        {
                Con_Printf("FS_WriteFile: failed on %s\n", filename);
@@ -1948,10 +2082,14 @@ fssearch_t *FS_Search(const char *pattern, int caseinsensitive, int quiet)
        char netpath[MAX_OSPATH];
        char temp[MAX_OSPATH];
 
-       while(!strncmp(pattern, "./", 2))
-               pattern += 2;
-       while(!strncmp(pattern, ".\\", 2))
-               pattern += 2;
+       for (i = 0;pattern[i] == '.' || pattern[i] == ':' || pattern[i] == '/' || pattern[i] == '\\';i++)
+               ;
+
+       if (i > 0)
+       {
+               Con_Printf("Don't use punctuation at the beginning of a search pattern!\n");
+               return NULL;
+       }
 
        search = NULL;
        liststart = NULL;
@@ -1960,14 +2098,9 @@ fssearch_t *FS_Search(const char *pattern, int caseinsensitive, int quiet)
        slash = strrchr(pattern, '/');
        backslash = strrchr(pattern, '\\');
        colon = strrchr(pattern, ':');
-       separator = pattern;
-       if (separator < slash)
-               separator = slash;
-       if (separator < backslash)
-               separator = backslash;
-       if (separator < colon)
-               separator = colon;
-       basepathlength = separator - pattern;
+       separator = max(slash, backslash);
+       separator = max(separator, colon);
+       basepathlength = separator ? (separator + 1 - pattern) : 0;
        basepath = Mem_Alloc (tempmempool, basepathlength + 1);
        if (basepathlength)
                memcpy(basepath, pattern, basepathlength);
@@ -2019,12 +2152,12 @@ fssearch_t *FS_Search(const char *pattern, int caseinsensitive, int quiet)
                else
                {
                        // get a directory listing and look at each name
-                       snprintf(netpath, sizeof (netpath), "%s/%s", searchpath->filename, basepath);
+                       dpsnprintf(netpath, sizeof (netpath), "%s%s", searchpath->filename, basepath);
                        if ((dir = listdirectory(netpath)))
                        {
                                for (dirfile = dir;dirfile;dirfile = dirfile->next)
                                {
-                                       snprintf(temp, sizeof(temp), "%s/%s", basepath, dirfile->text);
+                                       dpsnprintf(temp, sizeof(temp), "%s%s", basepath, dirfile->text);
                                        if (matchpattern(temp, (char *)pattern, true))
                                        {
                                                for (listtemp = liststart;listtemp;listtemp = listtemp->next)