rnd-20020318-3-src
[rocksndiamonds.git] / src / files.c
index 1e44ad714fae1c8c10dc28134d70ec2060707d40..9b5b73f5b302b002695091b382af99f7ea8f33da 100644 (file)
@@ -1,53 +1,48 @@
 /***********************************************************
-*  Rocks'n'Diamonds -- McDuffin Strikes Back!              *
+* Rocks'n'Diamonds -- McDuffin Strikes Back!               *
 *----------------------------------------------------------*
-*  (c) 1995-98 Artsoft Entertainment                       *
-*              Holger Schemel                              *
-*              Oststrasse 11a                              *
-*              33604 Bielefeld                             *
-*              phone: ++49 +521 290471                     *
-*              email: aeglos@valinor.owl.de                *
+* (c) 1995-2001 Artsoft Entertainment                      *
+*               Holger Schemel                             *
+*               Detmolder Strasse 189                      *
+*               33604 Bielefeld                            *
+*               Germany                                    *
+*               e-mail: info@artsoft.org                   *
 *----------------------------------------------------------*
-*  files.h                                                 *
+* files.c                                                  *
 ***********************************************************/
 
 #include <ctype.h>
 #include <dirent.h>
 #include <sys/stat.h>
-#include <unistd.h>
+
+#include "libgame/libgame.h"
 
 #include "files.h"
 #include "tools.h"
-#include "misc.h"
 #include "tape.h"
 #include "joystick.h"
 
-#define MAX_FILENAME_LEN       256     /* maximal filename length */
-#define MAX_LINE_LEN           1000    /* maximal input line length */
-#define CHUNK_ID_LEN           4       /* IFF style chunk id length */
-#define LEVEL_HEADER_SIZE      80      /* size of level file header */
-#define LEVEL_HEADER_UNUSED    15      /* unused level header bytes */
-#define TAPE_HEADER_SIZE       20      /* size of tape file header */
-#define TAPE_HEADER_UNUSED     7       /* unused tape header bytes */
-#define FILE_VERSION_1_0       10      /* 1.0 file version (old) */
-#define FILE_VERSION_1_2       12      /* 1.2 file version (still in use) */
-#define FILE_VERSION_1_4       14      /* 1.4 file version (new) */
+#define CHUNK_ID_LEN           4       /* IFF style chunk id length  */
+#define CHUNK_SIZE_UNDEFINED   0       /* undefined chunk size == 0  */
+#define CHUNK_SIZE_NONE                -1      /* do not write chunk size    */
+#define FILE_VERS_CHUNK_SIZE   8       /* size of file version chunk */
+#define LEVEL_HEADER_SIZE      80      /* size of level file header  */
+#define LEVEL_HEADER_UNUSED    15      /* unused level header bytes  */
+#define LEVEL_CHUNK_CNT2_SIZE  160     /* size of level CNT2 chunk   */
+#define LEVEL_CHUNK_CNT2_UNUSED        11      /* unused CNT2 chunk bytes    */
+#define TAPE_HEADER_SIZE       20      /* size of tape file header   */
+#define TAPE_HEADER_UNUSED     7       /* unused tape header bytes   */
 
 /* file identifier strings */
-#define LEVEL_COOKIE           "ROCKSNDIAMONDS_LEVEL_FILE_VERSION_1.4"
+#define LEVEL_COOKIE_TMPL      "ROCKSNDIAMONDS_LEVEL_FILE_VERSION_x.x"
+#define TAPE_COOKIE_TMPL       "ROCKSNDIAMONDS_TAPE_FILE_VERSION_x.x"
 #define SCORE_COOKIE           "ROCKSNDIAMONDS_SCORE_FILE_VERSION_1.2"
-#define TAPE_COOKIE            "ROCKSNDIAMONDS_TAPE_FILE_VERSION_1.2"
 #define SETUP_COOKIE           "ROCKSNDIAMONDS_SETUP_FILE_VERSION_1.2"
 #define LEVELSETUP_COOKIE      "ROCKSNDIAMONDS_LEVELSETUP_FILE_VERSION_1.2"
 #define LEVELINFO_COOKIE       "ROCKSNDIAMONDS_LEVELINFO_FILE_VERSION_1.2"
-/* old file identifiers for backward compatibility */
-#define LEVEL_COOKIE_10                "ROCKSNDIAMONDS_LEVEL_FILE_VERSION_1.0"
-#define LEVEL_COOKIE_12                "ROCKSNDIAMONDS_LEVEL_FILE_VERSION_1.2"
-#define TAPE_COOKIE_10         "ROCKSNDIAMONDS_LEVELREC_FILE_VERSION_1.0"
 
 /* file names and filename extensions */
-#ifndef MSDOS
-#define USERDATA_DIRECTORY     ".rocksndiamonds"
+#if !defined(PLATFORM_MSDOS)
 #define LEVELSETUP_DIRECTORY   "levelsetup"
 #define SETUP_FILENAME         "setup.conf"
 #define LEVELSETUP_FILENAME    "levelsetup.conf"
@@ -56,7 +51,6 @@
 #define TAPEFILE_EXTENSION     "tape"
 #define SCOREFILE_EXTENSION    "score"
 #else
-#define USERDATA_DIRECTORY     "userdata"
 #define LEVELSETUP_DIRECTORY   "lvlsetup"
 #define SETUP_FILENAME         "setup.cnf"
 #define LEVELSETUP_FILENAME    "lvlsetup.cnf"
 #define LEVELFILE_EXTENSION    "lvl"
 #define TAPEFILE_EXTENSION     "tap"
 #define SCOREFILE_EXTENSION    "sco"
-#define ERROR_FILENAME         "error.out"
 #endif
 
-/* file permissions for newly written files */
-#define MODE_R_ALL             (S_IRUSR | S_IRGRP | S_IROTH)
-#define MODE_W_ALL             (S_IWUSR | S_IWGRP | S_IWOTH)
-#define MODE_X_ALL             (S_IXUSR | S_IXGRP | S_IXOTH)
-#define USERDATA_DIR_MODE      (MODE_R_ALL | MODE_X_ALL | S_IWUSR)
-#define LEVEL_PERMS            (MODE_R_ALL | MODE_W_ALL)
-#define SCORE_PERMS            LEVEL_PERMS
-#define TAPE_PERMS             LEVEL_PERMS
-#define SETUP_PERMS            LEVEL_PERMS
-
 /* sort priorities of level series (also used as level series classes) */
 #define LEVELCLASS_TUTORIAL_START      10
 #define LEVELCLASS_TUTORIAL_END                99
@@ -187,26 +170,6 @@ char *getLevelClassDescription(struct LevelDirInfo *ldi)
 static void SaveUserLevelInfo();               /* for 'InitUserLevelDir()' */
 static char *getSetupLine(char *, int);                /* for 'SaveUserLevelInfo()' */
 
-char *getUserDataDir()
-{
-  static char *userdata_dir = NULL;
-
-  if (!userdata_dir)
-  {
-    char *home_dir = getHomeDir();
-    char *data_dir = USERDATA_DIRECTORY;
-
-    userdata_dir = getPath2(home_dir, data_dir);
-  }
-
-  return userdata_dir;
-}
-
-static char *getSetupDir()
-{
-  return getUserDataDir();
-}
-
 static char *getUserLevelDir(char *level_subdir)
 {
   static char *userlevel_dir = NULL;
@@ -284,10 +247,10 @@ static char *getLevelFilename(int nr)
     free(filename);
 
   sprintf(basename, "%03d.%s", nr, LEVELFILE_EXTENSION);
-  filename = getPath3((leveldir[leveldir_nr].user_defined ?
+  filename = getPath3((leveldir_current->user_defined ?
                       getUserLevelDir("") :
                       options.level_directory),
-                     leveldir[leveldir_nr].filename,
+                     leveldir_current->fullpath,
                      basename);
 
   return filename;
@@ -302,7 +265,7 @@ static char *getTapeFilename(int nr)
     free(filename);
 
   sprintf(basename, "%03d.%s", nr, TAPEFILE_EXTENSION);
-  filename = getPath2(getTapeDir(leveldir[leveldir_nr].filename), basename);
+  filename = getPath2(getTapeDir(leveldir_current->filename), basename);
 
   return filename;
 }
@@ -316,43 +279,31 @@ static char *getScoreFilename(int nr)
     free(filename);
 
   sprintf(basename, "%03d.%s", nr, SCOREFILE_EXTENSION);
-  filename = getPath2(getScoreDir(leveldir[leveldir_nr].filename), basename);
+  filename = getPath2(getScoreDir(leveldir_current->filename), basename);
 
   return filename;
 }
 
-static void createDirectory(char *dir, char *text)
-{
-  if (access(dir, F_OK) != 0)
-    if (mkdir(dir, USERDATA_DIR_MODE) != 0)
-      Error(ERR_WARN, "cannot create %s directory '%s'", text, dir);
-}
-
-static void InitUserDataDirectory()
-{
-  createDirectory(getUserDataDir(), "user data");
-}
-
 static void InitTapeDirectory(char *level_subdir)
 {
-  createDirectory(getUserDataDir(), "user data");
-  createDirectory(getTapeDir(""), "main tape");
-  createDirectory(getTapeDir(level_subdir), "level tape");
+  createDirectory(getUserDataDir(), "user data", PERMS_PRIVATE);
+  createDirectory(getTapeDir(""), "main tape", PERMS_PRIVATE);
+  createDirectory(getTapeDir(level_subdir), "level tape", PERMS_PRIVATE);
 }
 
 static void InitScoreDirectory(char *level_subdir)
 {
-  createDirectory(getScoreDir(""), "main score");
-  createDirectory(getScoreDir(level_subdir), "level score");
+  createDirectory(getScoreDir(""), "main score", PERMS_PUBLIC);
+  createDirectory(getScoreDir(level_subdir), "level score", PERMS_PUBLIC);
 }
 
 static void InitUserLevelDirectory(char *level_subdir)
 {
   if (access(getUserLevelDir(level_subdir), F_OK) != 0)
   {
-    createDirectory(getUserDataDir(), "user data");
-    createDirectory(getUserLevelDir(""), "main user level");
-    createDirectory(getUserLevelDir(level_subdir), "user level");
+    createDirectory(getUserDataDir(), "user data", PERMS_PRIVATE);
+    createDirectory(getUserLevelDir(""), "main user level", PERMS_PRIVATE);
+    createDirectory(getUserLevelDir(level_subdir), "user level",PERMS_PRIVATE);
 
     SaveUserLevelInfo();
   }
@@ -360,15 +311,66 @@ static void InitUserLevelDirectory(char *level_subdir)
 
 static void InitLevelSetupDirectory(char *level_subdir)
 {
-  createDirectory(getUserDataDir(), "user data");
-  createDirectory(getLevelSetupDir(""), "main level setup");
-  createDirectory(getLevelSetupDir(level_subdir), "level setup");
+  createDirectory(getUserDataDir(), "user data", PERMS_PRIVATE);
+  createDirectory(getLevelSetupDir(""), "main level setup", PERMS_PRIVATE);
+  createDirectory(getLevelSetupDir(level_subdir), "level setup",PERMS_PRIVATE);
+}
+
+static void ReadChunk_VERS(FILE *file, int *file_version, int *game_version)
+{
+  int file_version_major, file_version_minor, file_version_patch;
+  int game_version_major, game_version_minor, game_version_patch;
+
+  file_version_major = fgetc(file);
+  file_version_minor = fgetc(file);
+  file_version_patch = fgetc(file);
+  fgetc(file);         /* not used */
+
+  game_version_major = fgetc(file);
+  game_version_minor = fgetc(file);
+  game_version_patch = fgetc(file);
+  fgetc(file);         /* not used */
+
+  *file_version = VERSION_IDENT(file_version_major,
+                               file_version_minor,
+                               file_version_patch);
+
+  *game_version = VERSION_IDENT(game_version_major,
+                               game_version_minor,
+                               game_version_patch);
+}
+
+static void WriteChunk_VERS(FILE *file, int file_version, int game_version)
+{
+  int file_version_major = VERSION_MAJOR(file_version);
+  int file_version_minor = VERSION_MINOR(file_version);
+  int file_version_patch = VERSION_PATCH(file_version);
+  int game_version_major = VERSION_MAJOR(game_version);
+  int game_version_minor = VERSION_MINOR(game_version);
+  int game_version_patch = VERSION_PATCH(game_version);
+
+  fputc(file_version_major, file);
+  fputc(file_version_minor, file);
+  fputc(file_version_patch, file);
+  fputc(0, file);      /* not used */
+
+  fputc(game_version_major, file);
+  fputc(game_version_minor, file);
+  fputc(game_version_patch, file);
+  fputc(0, file);      /* not used */
 }
 
 static void setLevelInfoToDefaults()
 {
   int i, x, y;
 
+  level.file_version = FILE_VERSION_ACTUAL;
+  level.game_version = GAME_VERSION_ACTUAL;
+
+  level.encoding_16bit_field = FALSE;  /* default: only 8-bit elements */
+  level.encoding_16bit_yamyam = FALSE; /* default: only 8-bit elements */
+  level.encoding_16bit_amoeba = FALSE; /* default: only 8-bit elements */
+
   lev_fieldx = level.fieldx = STD_LEV_FIELDX;
   lev_fieldy = level.fieldy = STD_LEV_FIELDY;
 
@@ -402,7 +404,8 @@ static void setLevelInfoToDefaults()
   for(i=0; i<MAX_ELEMENT_CONTENTS; i++)
     for(x=0; x<3; x++)
       for(y=0; y<3; y++)
-       level.yam_content[i][x][y] = EL_FELSBROCKEN;
+       level.yam_content[i][x][y] =
+         (i < STD_ELEMENT_CONTENTS ? EL_FELSBROCKEN : EL_LEERRAUM);
 
   Feld[0][0] = Ur[0][0] = EL_SPIELFIGUR;
   Feld[STD_LEV_FIELDX-1][STD_LEV_FIELDY-1] =
@@ -411,313 +414,564 @@ static void setLevelInfoToDefaults()
   BorderElement = EL_BETON;
 
   /* try to determine better author name than 'anonymous' */
-  if (strcmp(leveldir[leveldir_nr].author, ANONYMOUS_NAME) != 0)
+  if (strcmp(leveldir_current->author, ANONYMOUS_NAME) != 0)
   {
-    strncpy(level.author, leveldir[leveldir_nr].author, MAX_LEVEL_AUTHOR_LEN);
+    strncpy(level.author, leveldir_current->author, MAX_LEVEL_AUTHOR_LEN);
     level.author[MAX_LEVEL_AUTHOR_LEN] = '\0';
   }
   else
   {
-    switch (LEVELCLASS(&leveldir[leveldir_nr]))
+    switch (LEVELCLASS(leveldir_current))
     {
       case LEVELCLASS_TUTORIAL:
-       strcpy(level.author, PROGRAM_AUTHOR_STRING);
-       break;
+       strcpy(level.author, PROGRAM_AUTHOR_STRING);
+       break;
 
       case LEVELCLASS_CONTRIBUTION:
-       strncpy(level.author, leveldir[leveldir_nr].name,MAX_LEVEL_AUTHOR_LEN);
-       level.author[MAX_LEVEL_AUTHOR_LEN] = '\0';
-       break;
+       strncpy(level.author, leveldir_current->name,MAX_LEVEL_AUTHOR_LEN);
+       level.author[MAX_LEVEL_AUTHOR_LEN] = '\0';
+       break;
 
       case LEVELCLASS_USER:
-       strncpy(level.author, getRealName(), MAX_LEVEL_AUTHOR_LEN);
-       level.author[MAX_LEVEL_AUTHOR_LEN] = '\0';
-       break;
+       strncpy(level.author, getRealName(), MAX_LEVEL_AUTHOR_LEN);
+       level.author[MAX_LEVEL_AUTHOR_LEN] = '\0';
+       break;
 
       default:
-       /* keep default value */
-       break;
+       /* keep default value */
+       break;
     }
   }
 }
 
-void LoadLevel(int level_nr)
+static int checkLevelElement(int element)
+{
+  if (element >= EL_FIRST_RUNTIME_EL)
+  {
+    Error(ERR_WARN, "invalid level element %d", element);
+    element = EL_CHAR_FRAGE;
+  }
+
+  return element;
+}
+
+static int LoadLevel_VERS(FILE *file, int chunk_size, struct LevelInfo *level)
+{
+  ReadChunk_VERS(file, &(level->file_version), &(level->game_version));
+
+  return chunk_size;
+}
+
+static int LoadLevel_HEAD(FILE *file, int chunk_size, struct LevelInfo *level)
 {
   int i, x, y;
-  char *filename = getLevelFilename(level_nr);
-  char cookie[MAX_LINE_LEN];
-  char chunk[CHUNK_ID_LEN + 1];
-  boolean encoding_16bit = FALSE;      /* default: maximal 256 elements */
-  int file_version = FILE_VERSION_1_4; /* last version of level files */
-  int chunk_length;
-  FILE *file;
 
-  /* always start with reliable default values */
-  setLevelInfoToDefaults();
+  lev_fieldx = level->fieldx = fgetc(file);
+  lev_fieldy = level->fieldy = fgetc(file);
 
-  if (!(file = fopen(filename, "r")))
-  {
-    Error(ERR_WARN, "cannot read level '%s' - creating new level", filename);
-    return;
-  }
+  level->time          = getFile16BitInteger(file, BYTE_ORDER_BIG_ENDIAN);
+  level->gems_needed   = getFile16BitInteger(file, BYTE_ORDER_BIG_ENDIAN);
 
-  /* check file identifier */
-  fgets(cookie, MAX_LINE_LEN, file);
-  if (strlen(cookie) > 0 && cookie[strlen(cookie) - 1] == '\n')
-    cookie[strlen(cookie) - 1] = '\0';
+  for(i=0; i<MAX_LEVEL_NAME_LEN; i++)
+    level->name[i] = fgetc(file);
+  level->name[MAX_LEVEL_NAME_LEN] = 0;
+
+  for(i=0; i<LEVEL_SCORE_ELEMENTS; i++)
+    level->score[i] = fgetc(file);
+
+  level->num_yam_contents = STD_ELEMENT_CONTENTS;
+  for(i=0; i<STD_ELEMENT_CONTENTS; i++)
+    for(y=0; y<3; y++)
+      for(x=0; x<3; x++)
+       level->yam_content[i][x][y] = checkLevelElement(fgetc(file));
+
+  level->amoeba_speed          = fgetc(file);
+  level->time_magic_wall       = fgetc(file);
+  level->time_wheel            = fgetc(file);
+  level->amoeba_content                = checkLevelElement(fgetc(file));
+  level->double_speed          = (fgetc(file) == 1 ? TRUE : FALSE);
+  level->gravity               = (fgetc(file) == 1 ? TRUE : FALSE);
+
+  level->encoding_16bit_field  = (fgetc(file) == 1 ? TRUE : FALSE);
+
+  ReadUnusedBytesFromFile(file, LEVEL_HEADER_UNUSED);
+
+  return chunk_size;
+}
 
-  if (strcmp(cookie, LEVEL_COOKIE_10) == 0)    /* old 1.0 level format */
-    file_version = FILE_VERSION_1_0;
-  else if (strcmp(cookie, LEVEL_COOKIE_12) == 0)/* 1.2 (8 bit) level format */
-    file_version = FILE_VERSION_1_2;
-  else if (strcmp(cookie, LEVEL_COOKIE) != 0)  /* unknown level format */
+static int LoadLevel_AUTH(FILE *file, int chunk_size, struct LevelInfo *level)
+{
+  int i;
+
+  for(i=0; i<MAX_LEVEL_AUTHOR_LEN; i++)
+    level->author[i] = fgetc(file);
+  level->author[MAX_LEVEL_NAME_LEN] = 0;
+
+  return chunk_size;
+}
+
+static int LoadLevel_CONT(FILE *file, int chunk_size, struct LevelInfo *level)
+{
+  int i, x, y;
+  int header_size = 4;
+  int content_size = MAX_ELEMENT_CONTENTS * 3 * 3;
+  int chunk_size_expected = header_size + content_size;
+
+  /* Note: "chunk_size" was wrong before version 2.0 when elements are
+     stored with 16-bit encoding (and should be twice as big then).
+     Even worse, playfield data was stored 16-bit when only yamyam content
+     contained 16-bit elements and vice versa. */
+
+  if (level->encoding_16bit_field && level->file_version >= FILE_VERSION_2_0)
+    chunk_size_expected += content_size;
+
+  if (chunk_size_expected != chunk_size)
   {
-    Error(ERR_WARN, "wrong file identifier of level file '%s'", filename);
-    fclose(file);
-    return;
+    ReadUnusedBytesFromFile(file, chunk_size);
+    return chunk_size_expected;
   }
 
-  /* read chunk "HEAD" */
-  if (file_version >= FILE_VERSION_1_2)
+  fgetc(file);
+  level->num_yam_contents = fgetc(file);
+  fgetc(file);
+  fgetc(file);
+
+  /* correct invalid number of content fields -- should never happen */
+  if (level->num_yam_contents < 1 ||
+      level->num_yam_contents > MAX_ELEMENT_CONTENTS)
+    level->num_yam_contents = STD_ELEMENT_CONTENTS;
+
+  for(i=0; i<MAX_ELEMENT_CONTENTS; i++)
+    for(y=0; y<3; y++)
+      for(x=0; x<3; x++)
+       level->yam_content[i][x][y] =
+         checkLevelElement(level->encoding_16bit_field ?
+                           getFile16BitInteger(file, BYTE_ORDER_BIG_ENDIAN) :
+                           fgetc(file));
+  return chunk_size;
+}
+
+static int LoadLevel_BODY(FILE *file, int chunk_size, struct LevelInfo *level)
+{
+  int x, y;
+  int chunk_size_expected = level->fieldx * level->fieldy;
+
+  /* Note: "chunk_size" was wrong before version 2.0 when elements are
+     stored with 16-bit encoding (and should be twice as big then).
+     Even worse, playfield data was stored 16-bit when only yamyam content
+     contained 16-bit elements and vice versa. */
+
+  if (level->encoding_16bit_field && level->file_version >= FILE_VERSION_2_0)
+    chunk_size_expected *= 2;
+
+  if (chunk_size_expected != chunk_size)
   {
-    getFileChunk(file, chunk, &chunk_length, BYTE_ORDER_BIG_ENDIAN);
-    if (strcmp(chunk, "HEAD") || chunk_length != LEVEL_HEADER_SIZE)
-    {
-      Error(ERR_WARN, "wrong 'HEAD' chunk of level file '%s'", filename);
-      fclose(file);
-      return;
-    }
+    ReadUnusedBytesFromFile(file, chunk_size);
+    return chunk_size_expected;
   }
 
-  lev_fieldx = level.fieldx = fgetc(file);
-  lev_fieldy = level.fieldy = fgetc(file);
-
-  level.time        = getFile16BitInteger(file, BYTE_ORDER_BIG_ENDIAN);
-  level.gems_needed = getFile16BitInteger(file, BYTE_ORDER_BIG_ENDIAN);
+  for(y=0; y<level->fieldy; y++)
+    for(x=0; x<level->fieldx; x++)
+      Feld[x][y] = Ur[x][y] =
+       checkLevelElement(level->encoding_16bit_field ?
+                         getFile16BitInteger(file, BYTE_ORDER_BIG_ENDIAN) :
+                         fgetc(file));
+  return chunk_size;
+}
 
-  for(i=0; i<MAX_LEVEL_NAME_LEN; i++)
-    level.name[i] = fgetc(file);
-  level.name[MAX_LEVEL_NAME_LEN] = 0;
+static int LoadLevel_CNT2(FILE *file, int chunk_size, struct LevelInfo *level)
+{
+  int i, x, y;
+  int element;
+  int num_contents, content_xsize, content_ysize;
+  int content_array[MAX_ELEMENT_CONTENTS][3][3];
 
-  for(i=0; i<LEVEL_SCORE_ELEMENTS; i++)
-    level.score[i] = fgetc(file);
+  element = checkLevelElement(getFile16BitInteger(file,BYTE_ORDER_BIG_ENDIAN));
+  num_contents = fgetc(file);
+  content_xsize = fgetc(file);
+  content_ysize = fgetc(file);
+  ReadUnusedBytesFromFile(file, LEVEL_CHUNK_CNT2_UNUSED);
 
-  level.num_yam_contents = STD_ELEMENT_CONTENTS;
   for(i=0; i<MAX_ELEMENT_CONTENTS; i++)
-  {
     for(y=0; y<3; y++)
-    {
       for(x=0; x<3; x++)
-      {
-       if (i < STD_ELEMENT_CONTENTS)
-         level.yam_content[i][x][y] = fgetc(file);
-       else
-         level.yam_content[i][x][y] = EL_LEERRAUM;
-      }
-    }
+       content_array[i][x][y] =
+         checkLevelElement(getFile16BitInteger(file, BYTE_ORDER_BIG_ENDIAN));
+
+  /* correct invalid number of content fields -- should never happen */
+  if (num_contents < 1 || num_contents > MAX_ELEMENT_CONTENTS)
+    num_contents = STD_ELEMENT_CONTENTS;
+
+  if (element == EL_MAMPFER)
+  {
+    level->num_yam_contents = num_contents;
+
+    for(i=0; i<num_contents; i++)
+      for(y=0; y<3; y++)
+       for(x=0; x<3; x++)
+         level->yam_content[i][x][y] = content_array[i][x][y];
+  }
+  else if (element == EL_AMOEBE_BD)
+  {
+    level->amoeba_content = content_array[0][0][0];
+  }
+  else
+  {
+    Error(ERR_WARN, "cannot load content for element '%d'", element);
   }
 
-  level.amoeba_speed   = fgetc(file);
-  level.time_magic_wall        = fgetc(file);
-  level.time_wheel     = fgetc(file);
-  level.amoeba_content = fgetc(file);
-  level.double_speed   = (fgetc(file) == 1 ? TRUE : FALSE);
-  level.gravity                = (fgetc(file) == 1 ? TRUE : FALSE);
+  return chunk_size;
+}
 
-  encoding_16bit       = (fgetc(file) == 1 ? TRUE : FALSE);
+void LoadLevel(int level_nr)
+{
+  char *filename = getLevelFilename(level_nr);
+  char cookie[MAX_LINE_LEN];
+  char chunk_name[CHUNK_ID_LEN + 1];
+  int chunk_size;
+  FILE *file;
 
-  for(i=0; i<LEVEL_HEADER_UNUSED; i++) /* skip unused header bytes */
-    fgetc(file);
+  /* always start with reliable default values */
+  setLevelInfoToDefaults();
 
-  if (file_version >= FILE_VERSION_1_2)
+  if (!(file = fopen(filename, MODE_READ)))
   {
-    getFileChunk(file, chunk, &chunk_length, BYTE_ORDER_BIG_ENDIAN);
+    Error(ERR_WARN, "cannot read level '%s' - creating new level", filename);
+    return;
+  }
 
-    /* look for optional author chunk */
-    if (strcmp(chunk, "AUTH") == 0 && chunk_length == MAX_LEVEL_AUTHOR_LEN)
-    {
-      for(i=0; i<MAX_LEVEL_AUTHOR_LEN; i++)
-       level.author[i] = fgetc(file);
-      level.author[MAX_LEVEL_NAME_LEN] = 0;
+  getFileChunk(file, chunk_name, NULL, BYTE_ORDER_BIG_ENDIAN);
+  if (strcmp(chunk_name, "RND1") == 0)
+  {
+    getFile32BitInteger(file, BYTE_ORDER_BIG_ENDIAN);  /* not used */
 
-      getFileChunk(file, chunk, &chunk_length, BYTE_ORDER_BIG_ENDIAN);
+    getFileChunk(file, chunk_name, NULL, BYTE_ORDER_BIG_ENDIAN);
+    if (strcmp(chunk_name, "CAVE") != 0)
+    {
+      Error(ERR_WARN, "unknown format of level file '%s'", filename);
+      fclose(file);
+      return;
     }
+  }
+  else /* check for pre-2.0 file format with cookie string */
+  {
+    strcpy(cookie, chunk_name);
+    fgets(&cookie[4], MAX_LINE_LEN - 4, file);
+    if (strlen(cookie) > 0 && cookie[strlen(cookie) - 1] == '\n')
+      cookie[strlen(cookie) - 1] = '\0';
 
-    /* look for optional content chunk */
-    if (strcmp(chunk, "CONT") == 0 &&
-       chunk_length == 4 + MAX_ELEMENT_CONTENTS * 3 * 3)
+    if (!checkCookieString(cookie, LEVEL_COOKIE_TMPL))
     {
-      fgetc(file);
-      level.num_yam_contents = fgetc(file);
-      fgetc(file);
-      fgetc(file);
-
-      if (level.num_yam_contents < 1 ||
-         level.num_yam_contents > MAX_ELEMENT_CONTENTS)
-      {
-#if DEBUG
-       printf("WARNING: num_yam_contents == %d (corrected)\n",
-              level.num_yam_contents);
-#endif
-       level.num_yam_contents = STD_ELEMENT_CONTENTS;
-      }
-
-      for(i=0; i<MAX_ELEMENT_CONTENTS; i++)
-       for(y=0; y<3; y++)
-         for(x=0; x<3; x++)
-           level.yam_content[i][x][y] =
-             (encoding_16bit ?
-              getFile16BitInteger(file, BYTE_ORDER_BIG_ENDIAN) :
-              fgetc(file));
-
-      getFileChunk(file, chunk, &chunk_length, BYTE_ORDER_BIG_ENDIAN);
+      Error(ERR_WARN, "unknown format of level file '%s'", filename);
+      fclose(file);
+      return;
     }
 
-    /* next check body chunk identifier and chunk length */
-    if (strcmp(chunk, "BODY") || chunk_length != lev_fieldx * lev_fieldy)
+    if ((level.file_version = getFileVersionFromCookieString(cookie)) == -1)
     {
-      Error(ERR_WARN, "wrong 'BODY' chunk of level file '%s'", filename);
+      Error(ERR_WARN, "unsupported version of level file '%s'", filename);
       fclose(file);
       return;
     }
   }
 
-  /* clear all other level fields (needed if resized in level editor later) */
-  for(x=0; x<MAX_LEV_FIELDX; x++)
-    for(y=0; y<MAX_LEV_FIELDY; y++)
-      Feld[x][y] = Ur[x][y] = EL_LEERRAUM;
+  if (level.file_version < FILE_VERSION_1_2)
+  {
+    /* level files from versions before 1.2.0 without chunk structure */
+    LoadLevel_HEAD(file, LEVEL_HEADER_SIZE,           &level);
+    LoadLevel_BODY(file, level.fieldx * level.fieldy, &level);
+  }
+  else
+  {
+    static struct
+    {
+      char *name;
+      int size;
+      int (*loader)(FILE *, int, struct LevelInfo *);
+    }
+    chunk_info[] =
+    {
+      { "VERS", FILE_VERS_CHUNK_SIZE,  LoadLevel_VERS },
+      { "HEAD", LEVEL_HEADER_SIZE,     LoadLevel_HEAD },
+      { "AUTH", MAX_LEVEL_AUTHOR_LEN,  LoadLevel_AUTH },
+      { "CONT", -1,                    LoadLevel_CONT },
+      { "BODY", -1,                    LoadLevel_BODY },
+      { "CNT2", LEVEL_CHUNK_CNT2_SIZE, LoadLevel_CNT2 },
+      {  NULL,  0,                     NULL }
+    };
+
+    while (getFileChunk(file, chunk_name, &chunk_size, BYTE_ORDER_BIG_ENDIAN))
+    {
+      int i = 0;
 
-  /* now read in the valid level fields from level file */
-  for(y=0; y<lev_fieldy; y++)
-    for(x=0; x<lev_fieldx; x++)
-      Feld[x][y] = Ur[x][y] =
-       (encoding_16bit ?
-        getFile16BitInteger(file, BYTE_ORDER_BIG_ENDIAN) :
-        fgetc(file));
+      while (chunk_info[i].name != NULL &&
+            strcmp(chunk_name, chunk_info[i].name) != 0)
+       i++;
+
+      if (chunk_info[i].name == NULL)
+      {
+       Error(ERR_WARN, "unknown chunk '%s' in level file '%s'",
+             chunk_name, filename);
+       ReadUnusedBytesFromFile(file, chunk_size);
+      }
+      else if (chunk_info[i].size != -1 &&
+              chunk_info[i].size != chunk_size)
+      {
+       Error(ERR_WARN, "wrong size (%d) of chunk '%s' in level file '%s'",
+             chunk_size, chunk_name, filename);
+       ReadUnusedBytesFromFile(file, chunk_size);
+      }
+      else
+      {
+       /* call function to load this level chunk */
+       int chunk_size_expected =
+         (chunk_info[i].loader)(file, chunk_size, &level);
+
+       /* the size of some chunks cannot be checked before reading other
+          chunks first (like "HEAD" and "BODY") that contain some header
+          information, so check them here */
+       if (chunk_size_expected != chunk_size)
+       {
+         Error(ERR_WARN, "wrong size (%d) of chunk '%s' in level file '%s'",
+               chunk_size, chunk_name, filename);
+       }
+      }
+    }
+  }
 
   fclose(file);
 
-  /* player was faster than monsters in pre-1.0 levels */
-  if (file_version == FILE_VERSION_1_0 &&
-      IS_LEVELCLASS_CONTRIBUTION(&leveldir[leveldir_nr]))
+  if (IS_LEVELCLASS_CONTRIBUTION(leveldir_current) ||
+      IS_LEVELCLASS_USER(leveldir_current))
   {
-    Error(ERR_WARN, "level file '%s' has version number 1.0", filename);
-    Error(ERR_WARN, "using high speed movement for player");
-    level.double_speed = TRUE;
+    /* for user contributed and private levels, use the version of
+       the game engine the levels were created for */
+    level.game_version = level.file_version;
+
+    /* player was faster than monsters in pre-1.0 levels */
+    if (level.file_version == FILE_VERSION_1_0)
+    {
+      Error(ERR_WARN, "level file '%s' has version number 1.0", filename);
+      Error(ERR_WARN, "using high speed movement for player");
+      level.double_speed = TRUE;
+    }
+  }
+  else
+  {
+    /* always use the latest version of the game engine for all but
+       user contributed and private levels */
+    level.game_version = GAME_VERSION_ACTUAL;
   }
 
   /* determine border element for this level */
   SetBorderElement();
 }
 
-void SaveLevel(int level_nr)
+static void SaveLevel_HEAD(FILE *file, struct LevelInfo *level)
 {
   int i, x, y;
-  char *filename = getLevelFilename(level_nr);
-  boolean encoding_16bit = FALSE;      /* default: maximal 256 elements */
-  char *oldest_possible_cookie;
-  FILE *file;
 
-  if (!(file = fopen(filename, "w")))
-  {
-    Error(ERR_WARN, "cannot save level file '%s'", filename);
-    return;
-  }
+  fputc(level->fieldx, file);
+  fputc(level->fieldy, file);
 
-  /* check yam content for 16-bit elements */
-  for(i=0; i<MAX_ELEMENT_CONTENTS; i++)
-    for(y=0; y<3; y++)
-      for(x=0; x<3; x++)
-       if (level.yam_content[i][x][y] > 255)
-         encoding_16bit = TRUE;
-
-  /* check level field for 16-bit elements */
-  for(y=0; y<lev_fieldy; y++) 
-    for(x=0; x<lev_fieldx; x++) 
-      if (Ur[x][y] > 255)
-       encoding_16bit = TRUE;
-
-  oldest_possible_cookie = (encoding_16bit ? LEVEL_COOKIE : LEVEL_COOKIE_12);
-
-  fputs(oldest_possible_cookie, file);         /* file identifier */
-  fputc('\n', file);
-
-  putFileChunk(file, "HEAD", LEVEL_HEADER_SIZE, BYTE_ORDER_BIG_ENDIAN);
-
-  fputc(level.fieldx, file);
-  fputc(level.fieldy, file);
-
-  putFile16BitInteger(file, level.time, BYTE_ORDER_BIG_ENDIAN);
-  putFile16BitInteger(file, level.gems_needed, BYTE_ORDER_BIG_ENDIAN);
+  putFile16BitInteger(file, level->time,        BYTE_ORDER_BIG_ENDIAN);
+  putFile16BitInteger(file, level->gems_needed, BYTE_ORDER_BIG_ENDIAN);
 
   for(i=0; i<MAX_LEVEL_NAME_LEN; i++)
-    fputc(level.name[i], file);
+    fputc(level->name[i], file);
+
   for(i=0; i<LEVEL_SCORE_ELEMENTS; i++)
-    fputc(level.score[i], file);
+    fputc(level->score[i], file);
+
   for(i=0; i<STD_ELEMENT_CONTENTS; i++)
     for(y=0; y<3; y++)
       for(x=0; x<3; x++)
-       fputc(encoding_16bit ? EL_LEERRAUM : level.yam_content[i][x][y], file);
-  fputc(level.amoeba_speed, file);
-  fputc(level.time_magic_wall, file);
-  fputc(level.time_wheel, file);
-  fputc(level.amoeba_content, file);
-  fputc((level.double_speed ? 1 : 0), file);
-  fputc((level.gravity ? 1 : 0), file);
-
-  fputc((encoding_16bit ? 1 : 0), file);
-
-  for(i=0; i<LEVEL_HEADER_UNUSED; i++) /* set unused header bytes to zero */
-    fputc(0, file);
+       fputc((level->encoding_16bit_yamyam ? EL_LEERRAUM :
+              level->yam_content[i][x][y]),
+             file);
+  fputc(level->amoeba_speed, file);
+  fputc(level->time_magic_wall, file);
+  fputc(level->time_wheel, file);
+  fputc((level->encoding_16bit_amoeba ? EL_LEERRAUM : level->amoeba_content),
+       file);
+  fputc((level->double_speed ? 1 : 0), file);
+  fputc((level->gravity ? 1 : 0), file);
+
+  fputc((level->encoding_16bit_field ? 1 : 0), file);
+
+  WriteUnusedBytesToFile(file, LEVEL_HEADER_UNUSED);
+}
 
-  putFileChunk(file, "AUTH", MAX_LEVEL_AUTHOR_LEN, BYTE_ORDER_BIG_ENDIAN);
+static void SaveLevel_AUTH(FILE *file, struct LevelInfo *level)
+{
+  int i;
 
   for(i=0; i<MAX_LEVEL_AUTHOR_LEN; i++)
-    fputc(level.author[i], file);
+    fputc(level->author[i], file);
+}
 
-  putFileChunk(file, "CONT", 4 + MAX_ELEMENT_CONTENTS * 3 * 3,
-              BYTE_ORDER_BIG_ENDIAN);
+#if 0
+static void SaveLevel_CONT(FILE *file, struct LevelInfo *level)
+{
+  int i, x, y;
 
   fputc(EL_MAMPFER, file);
-  fputc(level.num_yam_contents, file);
+  fputc(level->num_yam_contents, file);
   fputc(0, file);
   fputc(0, file);
 
   for(i=0; i<MAX_ELEMENT_CONTENTS; i++)
     for(y=0; y<3; y++)
       for(x=0; x<3; x++)
-       if (encoding_16bit)
-         putFile16BitInteger(file, level.yam_content[i][x][y],
+       if (level->encoding_16bit_field)
+         putFile16BitInteger(file, level->yam_content[i][x][y],
                              BYTE_ORDER_BIG_ENDIAN);
        else
-         fputc(level.yam_content[i][x][y], file);
+         fputc(level->yam_content[i][x][y], file);
+}
+#endif
 
-  putFileChunk(file, "BODY", lev_fieldx * lev_fieldy, BYTE_ORDER_BIG_ENDIAN);
+static void SaveLevel_BODY(FILE *file, struct LevelInfo *level)
+{
+  int x, y;
 
-  for(y=0; y<lev_fieldy; y++) 
-    for(x=0; x<lev_fieldx; x++) 
-      if (encoding_16bit)
+  for(y=0; y<level->fieldy; y++) 
+    for(x=0; x<level->fieldx; x++) 
+      if (level->encoding_16bit_field)
        putFile16BitInteger(file, Ur[x][y], BYTE_ORDER_BIG_ENDIAN);
       else
        fputc(Ur[x][y], file);
+}
 
-  fclose(file);
+static void SaveLevel_CNT2(FILE *file, struct LevelInfo *level, int element)
+{
+  int i, x, y;
+  int num_contents, content_xsize, content_ysize;
+  int content_array[MAX_ELEMENT_CONTENTS][3][3];
+
+  if (element == EL_MAMPFER)
+  {
+    num_contents = level->num_yam_contents;
+    content_xsize = 3;
+    content_ysize = 3;
+
+    for(i=0; i<MAX_ELEMENT_CONTENTS; i++)
+      for(y=0; y<3; y++)
+       for(x=0; x<3; x++)
+         content_array[i][x][y] = level->yam_content[i][x][y];
+  }
+  else if (element == EL_AMOEBE_BD)
+  {
+    num_contents = 1;
+    content_xsize = 1;
+    content_ysize = 1;
 
-  chmod(filename, LEVEL_PERMS);
+    for(i=0; i<MAX_ELEMENT_CONTENTS; i++)
+      for(y=0; y<3; y++)
+       for(x=0; x<3; x++)
+         content_array[i][x][y] = EL_LEERRAUM;
+    content_array[0][0][0] = level->amoeba_content;
+  }
+  else
+  {
+    /* chunk header already written -- write empty chunk data */
+    WriteUnusedBytesToFile(file, LEVEL_CHUNK_CNT2_SIZE);
+
+    Error(ERR_WARN, "cannot save content for element '%d'", element);
+    return;
+  }
+
+  putFile16BitInteger(file, element, BYTE_ORDER_BIG_ENDIAN);
+  fputc(num_contents, file);
+  fputc(content_xsize, file);
+  fputc(content_ysize, file);
+
+  WriteUnusedBytesToFile(file, LEVEL_CHUNK_CNT2_UNUSED);
+
+  for(i=0; i<MAX_ELEMENT_CONTENTS; i++)
+    for(y=0; y<3; y++)
+      for(x=0; x<3; x++)
+       putFile16BitInteger(file, content_array[i][x][y],
+                           BYTE_ORDER_BIG_ENDIAN);
 }
 
-void LoadTape(int level_nr)
+void SaveLevel(int level_nr)
 {
-  int i, j;
-  char *filename = getTapeFilename(level_nr);
-  char cookie[MAX_LINE_LEN];
-  char chunk[CHUNK_ID_LEN + 1];
+  int i, x, y;
+  char *filename = getLevelFilename(level_nr);
+  int body_chunk_size;
   FILE *file;
-  int num_participating_players;
-  int file_version = FILE_VERSION_1_2; /* last version of tape files */
-  int chunk_length;
+
+  if (!(file = fopen(filename, MODE_WRITE)))
+  {
+    Error(ERR_WARN, "cannot save level file '%s'", filename);
+    return;
+  }
+
+
+  /* check level field for 16-bit elements */
+  level.encoding_16bit_field = FALSE;
+  for(y=0; y<level.fieldy; y++) 
+    for(x=0; x<level.fieldx; x++) 
+      if (Ur[x][y] > 255)
+       level.encoding_16bit_field = TRUE;
+
+  /* check yamyam content for 16-bit elements */
+  level.encoding_16bit_yamyam = FALSE;
+  for(i=0; i<level.num_yam_contents; i++)
+    for(y=0; y<3; y++)
+      for(x=0; x<3; x++)
+       if (level.yam_content[i][x][y] > 255)
+         level.encoding_16bit_yamyam = TRUE;
+
+  /* check amoeba content for 16-bit elements */
+  level.encoding_16bit_amoeba = FALSE;
+  if (level.amoeba_content > 255)
+    level.encoding_16bit_amoeba = TRUE;
+
+  body_chunk_size =
+    level.fieldx * level.fieldy * (level.encoding_16bit_field ? 2 : 1);
+
+  putFileChunk(file, "RND1", CHUNK_SIZE_UNDEFINED, BYTE_ORDER_BIG_ENDIAN);
+  putFileChunk(file, "CAVE", CHUNK_SIZE_NONE,      BYTE_ORDER_BIG_ENDIAN);
+
+  putFileChunk(file, "VERS", FILE_VERS_CHUNK_SIZE, BYTE_ORDER_BIG_ENDIAN);
+  WriteChunk_VERS(file, FILE_VERSION_ACTUAL, GAME_VERSION_ACTUAL);
+
+  putFileChunk(file, "HEAD", LEVEL_HEADER_SIZE, BYTE_ORDER_BIG_ENDIAN);
+  SaveLevel_HEAD(file, &level);
+
+  putFileChunk(file, "AUTH", MAX_LEVEL_AUTHOR_LEN, BYTE_ORDER_BIG_ENDIAN);
+  SaveLevel_AUTH(file, &level);
+
+  putFileChunk(file, "BODY", body_chunk_size, BYTE_ORDER_BIG_ENDIAN);
+  SaveLevel_BODY(file, &level);
+
+  if (level.encoding_16bit_yamyam ||
+      level.num_yam_contents != STD_ELEMENT_CONTENTS)
+  {
+    putFileChunk(file, "CNT2", LEVEL_CHUNK_CNT2_SIZE, BYTE_ORDER_BIG_ENDIAN);
+    SaveLevel_CNT2(file, &level, EL_MAMPFER);
+  }
+
+  if (level.encoding_16bit_amoeba)
+  {
+    putFileChunk(file, "CNT2", LEVEL_CHUNK_CNT2_SIZE, BYTE_ORDER_BIG_ENDIAN);
+    SaveLevel_CNT2(file, &level, EL_AMOEBE_BD);
+  }
+
+  fclose(file);
+
+  SetFilePermissions(filename, PERMS_PRIVATE);
+}
+
+static void setTapeInfoToDefaults()
+{
+  int i;
 
   /* always start with reliable default values (empty tape) */
+  tape.file_version = FILE_VERSION_ACTUAL;
+  tape.game_version = GAME_VERSION_ACTUAL;
   TapeErase();
 
   /* default values (also for pre-1.2 tapes) with only the first player */
@@ -726,115 +980,99 @@ void LoadTape(int level_nr)
     tape.player_participates[i] = FALSE;
 
   /* at least one (default: the first) player participates in every tape */
-  num_participating_players = 1;
+  tape.num_participating_players = 1;
 
-  if (!(file = fopen(filename, "r")))
-    return;
+  tape.level_nr = level_nr;
+  tape.counter = 0;
+  tape.changed = FALSE;
 
-  /* check file identifier */
-  fgets(cookie, MAX_LINE_LEN, file);
-  if (strlen(cookie) > 0 && cookie[strlen(cookie) - 1] == '\n')
-    cookie[strlen(cookie) - 1] = '\0';
+  tape.recording = FALSE;
+  tape.playing = FALSE;
+  tape.pausing = FALSE;
+}
 
-  if (strcmp(cookie, TAPE_COOKIE_10) == 0)     /* old 1.0 tape format */
-    file_version = FILE_VERSION_1_0;
-  else if (strcmp(cookie, TAPE_COOKIE) != 0)   /* unknown tape format */
-  {
-    Error(ERR_WARN, "wrong file identifier of tape file '%s'", filename);
-    fclose(file);
-    return;
-  }
+static int LoadTape_VERS(FILE *file, int chunk_size, struct TapeInfo *tape)
+{
+  ReadChunk_VERS(file, &(tape->file_version), &(tape->game_version));
 
-  /* read chunk "HEAD" */
-  if (file_version >= FILE_VERSION_1_2)
-  {
-    getFileChunk(file, chunk, &chunk_length, BYTE_ORDER_BIG_ENDIAN);
-    if (strcmp(chunk, "HEAD") || chunk_length != TAPE_HEADER_SIZE)
-    {
-      Error(ERR_WARN, "wrong 'HEAD' chunk of tape file '%s'", filename);
-      fclose(file);
-      return;
-    }
-  }
+  return chunk_size;
+}
 
-  tape.random_seed = getFile32BitInteger(file, BYTE_ORDER_BIG_ENDIAN);
-  tape.date        = getFile32BitInteger(file, BYTE_ORDER_BIG_ENDIAN);
-  tape.length      = getFile32BitInteger(file, BYTE_ORDER_BIG_ENDIAN);
+static int LoadTape_HEAD(FILE *file, int chunk_size, struct TapeInfo *tape)
+{
+  int i;
+
+  tape->random_seed = getFile32BitInteger(file, BYTE_ORDER_BIG_ENDIAN);
+  tape->date        = getFile32BitInteger(file, BYTE_ORDER_BIG_ENDIAN);
+  tape->length      = getFile32BitInteger(file, BYTE_ORDER_BIG_ENDIAN);
 
   /* read header fields that are new since version 1.2 */
-  if (file_version >= FILE_VERSION_1_2)
+  if (tape->file_version >= FILE_VERSION_1_2)
   {
     byte store_participating_players = fgetc(file);
 
-    for(i=0; i<TAPE_HEADER_UNUSED; i++)                /* skip unused header bytes */
-      fgetc(file);
+    ReadUnusedBytesFromFile(file, TAPE_HEADER_UNUSED);
 
     /* since version 1.2, tapes store which players participate in the tape */
-    num_participating_players = 0;
+    tape->num_participating_players = 0;
     for(i=0; i<MAX_PLAYERS; i++)
     {
-      tape.player_participates[i] = FALSE;
+      tape->player_participates[i] = FALSE;
 
       if (store_participating_players & (1 << i))
       {
-       tape.player_participates[i] = TRUE;
-       num_participating_players++;
+       tape->player_participates[i] = TRUE;
+       tape->num_participating_players++;
       }
     }
   }
 
-  tape.level_nr = level_nr;
-  tape.counter = 0;
-  tape.changed = FALSE;
+  return chunk_size;
+}
 
-  tape.recording = FALSE;
-  tape.playing = FALSE;
-  tape.pausing = FALSE;
+static int LoadTape_BODY(FILE *file, int chunk_size, struct TapeInfo *tape)
+{
+  int i, j;
+  int chunk_size_expected =
+    (tape->num_participating_players + 1) * tape->length;
 
-  /* read chunk "BODY" */
-  if (file_version >= FILE_VERSION_1_2)
+  if (chunk_size_expected != chunk_size)
   {
-    getFileChunk(file, chunk, &chunk_length, BYTE_ORDER_BIG_ENDIAN);
-    if (strcmp(chunk, "BODY") ||
-       chunk_length != (num_participating_players + 1) * tape.length)
-    {
-      Error(ERR_WARN, "wrong 'BODY' chunk of tape file '%s'", filename);
-      fclose(file);
-      return;
-    }
+    ReadUnusedBytesFromFile(file, chunk_size);
+    return chunk_size_expected;
   }
 
-  for(i=0; i<tape.length; i++)
+  for(i=0; i<tape->length; i++)
   {
     if (i >= MAX_TAPELEN)
       break;
 
     for(j=0; j<MAX_PLAYERS; j++)
     {
-      tape.pos[i].action[j] = MV_NO_MOVING;
+      tape->pos[i].action[j] = MV_NO_MOVING;
 
-      if (tape.player_participates[j])
-       tape.pos[i].action[j] = fgetc(file);
+      if (tape->player_participates[j])
+       tape->pos[i].action[j] = fgetc(file);
     }
 
-    tape.pos[i].delay = fgetc(file);
+    tape->pos[i].delay = fgetc(file);
 
-    if (file_version == FILE_VERSION_1_0)
+    if (tape->file_version == FILE_VERSION_1_0)
     {
       /* eliminate possible diagonal moves in old tapes */
       /* this is only for backward compatibility */
 
       byte joy_dir[4] = { JOY_LEFT, JOY_RIGHT, JOY_UP, JOY_DOWN };
-      byte action = tape.pos[i].action[0];
+      byte action = tape->pos[i].action[0];
       int k, num_moves = 0;
 
       for (k=0; k<4; k++)
       {
        if (action & joy_dir[k])
        {
-         tape.pos[i + num_moves].action[0] = joy_dir[k];
+         tape->pos[i + num_moves].action[0] = joy_dir[k];
          if (num_moves > 0)
-           tape.pos[i + num_moves].delay = 0;
+           tape->pos[i + num_moves].delay = 0;
          num_moves++;
        }
       }
@@ -843,7 +1081,24 @@ void LoadTape(int level_nr)
       {
        num_moves--;
        i += num_moves;
-       tape.length += num_moves;
+       tape->length += num_moves;
+      }
+    }
+    else if (tape->file_version < FILE_VERSION_2_0)
+    {
+      if (tape->pos[i].delay > 1)
+      {
+       /* action part */
+       tape->pos[i + 1] = tape->pos[i];
+       tape->pos[i + 1].delay = 1;
+
+       /* delay part */
+       for(j=0; j<MAX_PLAYERS; j++)
+         tape->pos[i].action[j] = MV_NO_MOVING;
+       tape->pos[i].delay--;
+
+       i++;
+       tape->length++;
       }
     }
 
@@ -851,24 +1106,172 @@ void LoadTape(int level_nr)
       break;
   }
 
-  fclose(file);
+  if (i != tape->length)
+    chunk_size = (tape->num_participating_players + 1) * i;
+
+  return chunk_size;
+}
+
+void LoadTape(int level_nr)
+{
+  char *filename = getTapeFilename(level_nr);
+  char cookie[MAX_LINE_LEN];
+  char chunk_name[CHUNK_ID_LEN + 1];
+  FILE *file;
+  int chunk_size;
+
+  /* always start with reliable default values */
+  setTapeInfoToDefaults();
+
+  if (!(file = fopen(filename, MODE_READ)))
+    return;
+
+  getFileChunk(file, chunk_name, NULL, BYTE_ORDER_BIG_ENDIAN);
+  if (strcmp(chunk_name, "RND1") == 0)
+  {
+    getFile32BitInteger(file, BYTE_ORDER_BIG_ENDIAN);  /* not used */
+
+    getFileChunk(file, chunk_name, NULL, BYTE_ORDER_BIG_ENDIAN);
+    if (strcmp(chunk_name, "TAPE") != 0)
+    {
+      Error(ERR_WARN, "unknown format of tape file '%s'", filename);
+      fclose(file);
+      return;
+    }
+  }
+  else /* check for pre-2.0 file format with cookie string */
+  {
+    strcpy(cookie, chunk_name);
+    fgets(&cookie[4], MAX_LINE_LEN - 4, file);
+    if (strlen(cookie) > 0 && cookie[strlen(cookie) - 1] == '\n')
+      cookie[strlen(cookie) - 1] = '\0';
+
+    if (!checkCookieString(cookie, TAPE_COOKIE_TMPL))
+    {
+      Error(ERR_WARN, "unknown format of tape file '%s'", filename);
+      fclose(file);
+      return;
+    }
+
+    if ((tape.file_version = getFileVersionFromCookieString(cookie)) == -1)
+    {
+      Error(ERR_WARN, "unsupported version of tape file '%s'", filename);
+      fclose(file);
+      return;
+    }
+  }
+
+  tape.game_version = tape.file_version;
+
+  if (tape.file_version < FILE_VERSION_1_2)
+  {
+    /* tape files from versions before 1.2.0 without chunk structure */
+    LoadTape_HEAD(file, TAPE_HEADER_SIZE, &tape);
+    LoadTape_BODY(file, 2 * tape.length,  &tape);
+  }
+  else
+  {
+    static struct
+    {
+      char *name;
+      int size;
+      int (*loader)(FILE *, int, struct TapeInfo *);
+    }
+    chunk_info[] =
+    {
+      { "VERS", FILE_VERS_CHUNK_SIZE,  LoadTape_VERS },
+      { "HEAD", TAPE_HEADER_SIZE,      LoadTape_HEAD },
+      { "BODY", -1,                    LoadTape_BODY },
+      {  NULL,  0,                     NULL }
+    };
+
+    while (getFileChunk(file, chunk_name, &chunk_size, BYTE_ORDER_BIG_ENDIAN))
+    {
+      int i = 0;
+
+      while (chunk_info[i].name != NULL &&
+            strcmp(chunk_name, chunk_info[i].name) != 0)
+       i++;
+
+      if (chunk_info[i].name == NULL)
+      {
+       Error(ERR_WARN, "unknown chunk '%s' in tape file '%s'",
+             chunk_name, filename);
+       ReadUnusedBytesFromFile(file, chunk_size);
+      }
+      else if (chunk_info[i].size != -1 &&
+              chunk_info[i].size != chunk_size)
+      {
+       Error(ERR_WARN, "wrong size (%d) of chunk '%s' in tape file '%s'",
+             chunk_size, chunk_name, filename);
+       ReadUnusedBytesFromFile(file, chunk_size);
+      }
+      else
+      {
+       /* call function to load this tape chunk */
+       int chunk_size_expected =
+         (chunk_info[i].loader)(file, chunk_size, &tape);
+
+       /* the size of some chunks cannot be checked before reading other
+          chunks first (like "HEAD" and "BODY") that contain some header
+          information, so check them here */
+       if (chunk_size_expected != chunk_size)
+       {
+         Error(ERR_WARN, "wrong size (%d) of chunk '%s' in tape file '%s'",
+               chunk_size, chunk_name, filename);
+       }
+      }
+    }
+  }
 
-  if (i != tape.length)
-    Error(ERR_WARN, "level recording file '%s' corrupted", filename);
+  fclose(file);
 
   tape.length_seconds = GetTapeLength();
 }
 
+static void SaveTape_HEAD(FILE *file, struct TapeInfo *tape)
+{
+  int i;
+  byte store_participating_players = 0;
+
+  /* set bits for participating players for compact storage */
+  for(i=0; i<MAX_PLAYERS; i++)
+    if (tape->player_participates[i])
+      store_participating_players |= (1 << i);
+
+  putFile32BitInteger(file, tape->random_seed, BYTE_ORDER_BIG_ENDIAN);
+  putFile32BitInteger(file, tape->date, BYTE_ORDER_BIG_ENDIAN);
+  putFile32BitInteger(file, tape->length, BYTE_ORDER_BIG_ENDIAN);
+
+  fputc(store_participating_players, file);
+
+  WriteUnusedBytesToFile(file, TAPE_HEADER_UNUSED);
+}
+
+static void SaveTape_BODY(FILE *file, struct TapeInfo *tape)
+{
+  int i, j;
+
+  for(i=0; i<tape->length; i++)
+  {
+    for(j=0; j<MAX_PLAYERS; j++)
+      if (tape->player_participates[j])
+       fputc(tape->pos[i].action[j], file);
+
+    fputc(tape->pos[i].delay, file);
+  }
+}
+
 void SaveTape(int level_nr)
 {
   int i;
   char *filename = getTapeFilename(level_nr);
   FILE *file;
   boolean new_tape = TRUE;
-  byte store_participating_players;
-  int num_participating_players;
+  int num_participating_players = 0;
+  int body_chunk_size;
 
-  InitTapeDirectory(leveldir[leveldir_nr].filename);
+  InitTapeDirectory(leveldir_current->filename);
 
   /* if a tape still exists, ask to overwrite it */
   if (access(filename, F_OK) == 0)
@@ -878,60 +1281,83 @@ void SaveTape(int level_nr)
       return;
   }
 
-  /* count number of players and set corresponding bits for compact storage */
-  store_participating_players = 0;
-  num_participating_players = 0;
-  for(i=0; i<MAX_PLAYERS; i++)
-  {
-    if (tape.player_participates[i])
-    {
-      num_participating_players++;
-      store_participating_players |= (1 << i);
-    }
-  }
-
-  if (!(file = fopen(filename, "w")))
+  if (!(file = fopen(filename, MODE_WRITE)))
   {
     Error(ERR_WARN, "cannot save level recording file '%s'", filename);
     return;
   }
 
-  fputs(TAPE_COOKIE, file);            /* file identifier */
-  fputc('\n', file);
+  /* count number of participating players  */
+  for(i=0; i<MAX_PLAYERS; i++)
+    if (tape.player_participates[i])
+      num_participating_players++;
+
+  body_chunk_size = (num_participating_players + 1) * tape.length;
+
+  putFileChunk(file, "RND1", CHUNK_SIZE_UNDEFINED, BYTE_ORDER_BIG_ENDIAN);
+  putFileChunk(file, "TAPE", CHUNK_SIZE_NONE,      BYTE_ORDER_BIG_ENDIAN);
+
+  putFileChunk(file, "VERS", FILE_VERS_CHUNK_SIZE, BYTE_ORDER_BIG_ENDIAN);
+  WriteChunk_VERS(file, FILE_VERSION_ACTUAL, GAME_VERSION_ACTUAL);
 
   putFileChunk(file, "HEAD", TAPE_HEADER_SIZE, BYTE_ORDER_BIG_ENDIAN);
+  SaveTape_HEAD(file, &tape);
 
-  putFile32BitInteger(file, tape.random_seed, BYTE_ORDER_BIG_ENDIAN);
-  putFile32BitInteger(file, tape.date, BYTE_ORDER_BIG_ENDIAN);
-  putFile32BitInteger(file, tape.length, BYTE_ORDER_BIG_ENDIAN);
+  putFileChunk(file, "BODY", body_chunk_size, BYTE_ORDER_BIG_ENDIAN);
+  SaveTape_BODY(file, &tape);
 
-  fputc(store_participating_players, file);
+  fclose(file);
+
+  SetFilePermissions(filename, PERMS_PRIVATE);
+
+  tape.changed = FALSE;
+
+  if (new_tape)
+    Request("tape saved !", REQ_CONFIRM);
+}
+
+void DumpTape(struct TapeInfo *tape)
+{
+  int i, j;
 
-  for(i=0; i<TAPE_HEADER_UNUSED; i++)  /* set unused header bytes to zero */
-    fputc(0, file);
+  if (TAPE_IS_EMPTY(*tape))
+  {
+    Error(ERR_WARN, "no tape available for level %d", tape->level_nr);
+    return;
+  }
 
-  putFileChunk(file, "BODY", (num_participating_players + 1) * tape.length,
-              BYTE_ORDER_BIG_ENDIAN);
+  printf("\n");
+  printf("-------------------------------------------------------------------------------\n");
+  printf("Tape of Level %d (file version %06d, game version %06d\n",
+        tape->level_nr, tape->file_version, tape->game_version);
+  printf("-------------------------------------------------------------------------------\n");
 
-  for(i=0; i<tape.length; i++)
+  for(i=0; i<tape->length; i++)
   {
-    int j;
+    if (i >= MAX_TAPELEN)
+      break;
 
     for(j=0; j<MAX_PLAYERS; j++)
-      if (tape.player_participates[j])
-       fputc(tape.pos[i].action[j], file);
+    {
+      if (tape->player_participates[j])
+      {
+       int action = tape->pos[i].action[j];
+
+       printf("%d:%02x ", j, action);
+       printf("[%c%c%c%c|%c%c] - ",
+              (action & JOY_LEFT ? '<' : ' '),
+              (action & JOY_RIGHT ? '>' : ' '),
+              (action & JOY_UP ? '^' : ' '),
+              (action & JOY_DOWN ? 'v' : ' '),
+              (action & JOY_BUTTON_1 ? '1' : ' '),
+              (action & JOY_BUTTON_2 ? '2' : ' '));
+      }
+    }
 
-    fputc(tape.pos[i].delay, file);
+    printf("(%03d)\n", tape->pos[i].delay);
   }
 
-  fclose(file);
-
-  chmod(filename, TAPE_PERMS);
-
-  tape.changed = FALSE;
-
-  if (new_tape)
-    Request("tape saved !", REQ_CONFIRM);
+  printf("-------------------------------------------------------------------------------\n");
 }
 
 void LoadScore(int level_nr)
@@ -950,7 +1376,7 @@ void LoadScore(int level_nr)
     highscore[i].Score = 0;
   }
 
-  if (!(file = fopen(filename, "r")))
+  if (!(file = fopen(filename, MODE_READ)))
     return;
 
   /* check file identifier */
@@ -958,9 +1384,9 @@ void LoadScore(int level_nr)
   if (strlen(cookie) > 0 && cookie[strlen(cookie) - 1] == '\n')
     cookie[strlen(cookie) - 1] = '\0';
 
-  if (strcmp(cookie, SCORE_COOKIE) != 0)
+  if (!checkCookieString(cookie, SCORE_COOKIE))
   {
-    Error(ERR_WARN, "wrong file identifier of score file '%s'", filename);
+    Error(ERR_WARN, "unknown format of score file '%s'", filename);
     fclose(file);
     return;
   }
@@ -993,9 +1419,9 @@ void SaveScore(int level_nr)
   char *filename = getScoreFilename(level_nr);
   FILE *file;
 
-  InitScoreDirectory(leveldir[leveldir_nr].filename);
+  InitScoreDirectory(leveldir_current->filename);
 
-  if (!(file = fopen(filename, "w")))
+  if (!(file = fopen(filename, MODE_WRITE)))
   {
     Error(ERR_WARN, "cannot save score for level %d", level_nr);
     return;
@@ -1008,29 +1434,24 @@ void SaveScore(int level_nr)
 
   fclose(file);
 
-  chmod(filename, SCORE_PERMS);
+  SetFilePermissions(filename, PERMS_PUBLIC);
 }
 
-#define TOKEN_STR_FILE_IDENTIFIER      "file_identifier"
+/* ------------------------------------------------------------------------- */
+/* setup file stuff                                                          */
+/* ------------------------------------------------------------------------- */
+
 #define TOKEN_STR_LAST_LEVEL_SERIES    "last_level_series"
 #define TOKEN_STR_LAST_PLAYED_LEVEL    "last_played_level"
 #define TOKEN_STR_HANDICAP_LEVEL       "handicap_level"
 #define TOKEN_STR_PLAYER_PREFIX                "player_"
 
-#define TOKEN_VALUE_POSITION           30
-
 /* global setup */
 #define SETUP_TOKEN_PLAYER_NAME                0
 #define SETUP_TOKEN_SOUND              1
 #define SETUP_TOKEN_SOUND_LOOPS                2
 #define SETUP_TOKEN_SOUND_MUSIC                3
 #define SETUP_TOKEN_SOUND_SIMPLE       4
-
-#if 0
-#define SETUP_TOKEN_TOONS              5
-#define SETUP_TOKEN_DOUBLE_BUFFERING   6
-#endif
-
 #define SETUP_TOKEN_SCROLL_DELAY       5
 #define SETUP_TOKEN_SOFT_SCROLLING     6
 #define SETUP_TOKEN_FADING             7
@@ -1039,38 +1460,40 @@ void SaveScore(int level_nr)
 #define SETUP_TOKEN_TEAM_MODE          10
 #define SETUP_TOKEN_HANDICAP           11
 #define SETUP_TOKEN_TIME_LIMIT         12
+#define SETUP_TOKEN_FULLSCREEN         13
 
 /* player setup */
-#define SETUP_TOKEN_USE_JOYSTICK       13
-#define SETUP_TOKEN_JOY_DEVICE_NAME    14
-#define SETUP_TOKEN_JOY_XLEFT          15
-#define SETUP_TOKEN_JOY_XMIDDLE                16
-#define SETUP_TOKEN_JOY_XRIGHT         17
-#define SETUP_TOKEN_JOY_YUPPER         18
-#define SETUP_TOKEN_JOY_YMIDDLE                19
-#define SETUP_TOKEN_JOY_YLOWER         20
-#define SETUP_TOKEN_JOY_SNAP           21
-#define SETUP_TOKEN_JOY_BOMB           22
-#define SETUP_TOKEN_KEY_LEFT           23
-#define SETUP_TOKEN_KEY_RIGHT          24
-#define SETUP_TOKEN_KEY_UP             25
-#define SETUP_TOKEN_KEY_DOWN           26
-#define SETUP_TOKEN_KEY_SNAP           27
-#define SETUP_TOKEN_KEY_BOMB           28
+#define SETUP_TOKEN_USE_JOYSTICK       14
+#define SETUP_TOKEN_JOY_DEVICE_NAME    15
+#define SETUP_TOKEN_JOY_XLEFT          16
+#define SETUP_TOKEN_JOY_XMIDDLE                17
+#define SETUP_TOKEN_JOY_XRIGHT         18
+#define SETUP_TOKEN_JOY_YUPPER         19
+#define SETUP_TOKEN_JOY_YMIDDLE                20
+#define SETUP_TOKEN_JOY_YLOWER         21
+#define SETUP_TOKEN_JOY_SNAP           22
+#define SETUP_TOKEN_JOY_BOMB           23
+#define SETUP_TOKEN_KEY_LEFT           24
+#define SETUP_TOKEN_KEY_RIGHT          25
+#define SETUP_TOKEN_KEY_UP             26
+#define SETUP_TOKEN_KEY_DOWN           27
+#define SETUP_TOKEN_KEY_SNAP           28
+#define SETUP_TOKEN_KEY_BOMB           29
 
 /* level directory info */
-#define LEVELINFO_TOKEN_NAME           29
-#define LEVELINFO_TOKEN_NAME_SHORT     30
-#define LEVELINFO_TOKEN_NAME_SORTING   31
-#define LEVELINFO_TOKEN_AUTHOR         32
-#define LEVELINFO_TOKEN_IMPORTED_FROM  33
-#define LEVELINFO_TOKEN_LEVELS         34
-#define LEVELINFO_TOKEN_FIRST_LEVEL    35
-#define LEVELINFO_TOKEN_SORT_PRIORITY  36
-#define LEVELINFO_TOKEN_READONLY       37
+#define LEVELINFO_TOKEN_NAME           30
+#define LEVELINFO_TOKEN_NAME_SHORT     31
+#define LEVELINFO_TOKEN_NAME_SORTING   32
+#define LEVELINFO_TOKEN_AUTHOR         33
+#define LEVELINFO_TOKEN_IMPORTED_FROM  34
+#define LEVELINFO_TOKEN_LEVELS         35
+#define LEVELINFO_TOKEN_FIRST_LEVEL    36
+#define LEVELINFO_TOKEN_SORT_PRIORITY  37
+#define LEVELINFO_TOKEN_LEVEL_GROUP    38
+#define LEVELINFO_TOKEN_READONLY       39
 
 #define FIRST_GLOBAL_SETUP_TOKEN       SETUP_TOKEN_PLAYER_NAME
-#define LAST_GLOBAL_SETUP_TOKEN                SETUP_TOKEN_TIME_LIMIT
+#define LAST_GLOBAL_SETUP_TOKEN                SETUP_TOKEN_FULLSCREEN
 
 #define FIRST_PLAYER_SETUP_TOKEN       SETUP_TOKEN_USE_JOYSTICK
 #define LAST_PLAYER_SETUP_TOKEN                SETUP_TOKEN_KEY_BOMB
@@ -1078,12 +1501,6 @@ void SaveScore(int level_nr)
 #define FIRST_LEVELINFO_TOKEN          LEVELINFO_TOKEN_NAME
 #define LAST_LEVELINFO_TOKEN           LEVELINFO_TOKEN_READONLY
 
-#define TYPE_BOOLEAN                   1
-#define TYPE_SWITCH                    2
-#define TYPE_KEYSYM                    3
-#define TYPE_INTEGER                   4
-#define TYPE_STRING                    5
-
 static struct SetupInfo si;
 static struct SetupInputInfo sii;
 static struct LevelDirInfo ldi;
@@ -1100,12 +1517,6 @@ static struct
   { TYPE_SWITCH,  &si.sound_loops,     "repeating_sound_loops"         },
   { TYPE_SWITCH,  &si.sound_music,     "background_music"              },
   { TYPE_SWITCH,  &si.sound_simple,    "simple_sound_effects"          },
-
-#if 0
-  { TYPE_SWITCH,  &si.toons,           "toons"                         },
-  { TYPE_SWITCH,  &si.double_buffering,        "double_buffering"              },
-#endif
-
   { TYPE_SWITCH,  &si.scroll_delay,    "scroll_delay"                  },
   { TYPE_SWITCH,  &si.soft_scrolling,  "soft_scrolling"                },
   { TYPE_SWITCH,  &si.fading,          "screen_fading"                 },
@@ -1114,6 +1525,7 @@ static struct
   { TYPE_SWITCH,  &si.team_mode,       "team_mode"                     },
   { TYPE_SWITCH,  &si.handicap,                "handicap"                      },
   { TYPE_SWITCH,  &si.time_limit,      "time_limit"                    },
+  { TYPE_SWITCH,  &si.fullscreen,      "fullscreen"                    },
 
   /* player setup */
   { TYPE_BOOLEAN, &sii.use_joystick,   ".use_joystick"                 },
@@ -1126,12 +1538,12 @@ static struct
   { TYPE_INTEGER, &sii.joy.ylower,     ".joy.ylower"                   },
   { TYPE_INTEGER, &sii.joy.snap,       ".joy.snap_field"               },
   { TYPE_INTEGER, &sii.joy.bomb,       ".joy.place_bomb"               },
-  { TYPE_KEYSYM,  &sii.key.left,       ".key.move_left"                },
-  { TYPE_KEYSYM,  &sii.key.right,      ".key.move_right"               },
-  { TYPE_KEYSYM,  &sii.key.up,         ".key.move_up"                  },
-  { TYPE_KEYSYM,  &sii.key.down,       ".key.move_down"                },
-  { TYPE_KEYSYM,  &sii.key.snap,       ".key.snap_field"               },
-  { TYPE_KEYSYM,  &sii.key.bomb,       ".key.place_bomb"               },
+  { TYPE_KEY,     &sii.key.left,       ".key.move_left"                },
+  { TYPE_KEY,     &sii.key.right,      ".key.move_right"               },
+  { TYPE_KEY,     &sii.key.up,         ".key.move_up"                  },
+  { TYPE_KEY,     &sii.key.down,       ".key.move_down"                },
+  { TYPE_KEY,     &sii.key.snap,       ".key.snap_field"               },
+  { TYPE_KEY,     &sii.key.bomb,       ".key.place_bomb"               },
 
   /* level directory info */
   { TYPE_STRING,  &ldi.name,           "name"                          },
@@ -1142,267 +1554,15 @@ static struct
   { TYPE_INTEGER, &ldi.levels,         "levels"                        },
   { TYPE_INTEGER, &ldi.first_level,    "first_level"                   },
   { TYPE_INTEGER, &ldi.sort_priority,  "sort_priority"                 },
+  { TYPE_BOOLEAN, &ldi.level_group,    "level_group"                   },
   { TYPE_BOOLEAN, &ldi.readonly,       "readonly"                      }
 };
 
-static char *string_tolower(char *s)
-{
-  static char s_lower[100];
-  int i;
-
-  if (strlen(s) >= 100)
-    return s;
-
-  strcpy(s_lower, s);
-
-  for (i=0; i<strlen(s_lower); i++)
-    s_lower[i] = tolower(s_lower[i]);
-
-  return s_lower;
-}
-
-static int get_string_integer_value(char *s)
-{
-  static char *number_text[][3] =
-  {
-    { "0", "zero", "null", },
-    { "1", "one", "first" },
-    { "2", "two", "second" },
-    { "3", "three", "third" },
-    { "4", "four", "fourth" },
-    { "5", "five", "fifth" },
-    { "6", "six", "sixth" },
-    { "7", "seven", "seventh" },
-    { "8", "eight", "eighth" },
-    { "9", "nine", "ninth" },
-    { "10", "ten", "tenth" },
-    { "11", "eleven", "eleventh" },
-    { "12", "twelve", "twelfth" },
-  };
-
-  int i, j;
-
-  for (i=0; i<13; i++)
-    for (j=0; j<3; j++)
-      if (strcmp(string_tolower(s), number_text[i][j]) == 0)
-       return i;
-
-  return atoi(s);
-}
-
-static boolean get_string_boolean_value(char *s)
-{
-  if (strcmp(string_tolower(s), "true") == 0 ||
-      strcmp(string_tolower(s), "yes") == 0 ||
-      strcmp(string_tolower(s), "on") == 0 ||
-      get_string_integer_value(s) == 1)
-    return TRUE;
-  else
-    return FALSE;
-}
-
-static char *getFormattedSetupEntry(char *token, char *value)
-{
-  int i;
-  static char entry[MAX_LINE_LEN];
-
-  sprintf(entry, "%s:", token);
-  for (i=strlen(entry); i<TOKEN_VALUE_POSITION; i++)
-    entry[i] = ' ';
-  entry[i] = '\0';
-
-  strcat(entry, value);
-
-  return entry;
-}
-
-static void freeSetupFileList(struct SetupFileList *setup_file_list)
-{
-  if (!setup_file_list)
-    return;
-
-  if (setup_file_list->token)
-    free(setup_file_list->token);
-  if (setup_file_list->value)
-    free(setup_file_list->value);
-  if (setup_file_list->next)
-    freeSetupFileList(setup_file_list->next);
-  free(setup_file_list);
-}
-
-static struct SetupFileList *newSetupFileList(char *token, char *value)
-{
-  struct SetupFileList *new = checked_malloc(sizeof(struct SetupFileList));
-
-  new->token = checked_malloc(strlen(token) + 1);
-  strcpy(new->token, token);
-
-  new->value = checked_malloc(strlen(value) + 1);
-  strcpy(new->value, value);
-
-  new->next = NULL;
-
-  return new;
-}
-
-static char *getTokenValue(struct SetupFileList *setup_file_list,
-                          char *token)
-{
-  if (!setup_file_list)
-    return NULL;
-
-  if (strcmp(setup_file_list->token, token) == 0)
-    return setup_file_list->value;
-  else
-    return getTokenValue(setup_file_list->next, token);
-}
-
-static void setTokenValue(struct SetupFileList *setup_file_list,
-                         char *token, char *value)
-{
-  if (!setup_file_list)
-    return;
-
-  if (strcmp(setup_file_list->token, token) == 0)
-  {
-    free(setup_file_list->value);
-    setup_file_list->value = checked_malloc(strlen(value) + 1);
-    strcpy(setup_file_list->value, value);
-  }
-  else if (setup_file_list->next == NULL)
-    setup_file_list->next = newSetupFileList(token, value);
-  else
-    setTokenValue(setup_file_list->next, token, value);
-}
-
-#ifdef DEBUG
-static void printSetupFileList(struct SetupFileList *setup_file_list)
-{
-  if (!setup_file_list)
-    return;
-
-  printf("token: '%s'\n", setup_file_list->token);
-  printf("value: '%s'\n", setup_file_list->value);
-
-  printSetupFileList(setup_file_list->next);
-}
-#endif
-
-static struct SetupFileList *loadSetupFileList(char *filename)
-{
-  int line_len;
-  char line[MAX_LINE_LEN];
-  char *token, *value, *line_ptr;
-  struct SetupFileList *setup_file_list = newSetupFileList("", "");
-  struct SetupFileList *first_valid_list_entry;
-
-  FILE *file;
-
-  if (!(file = fopen(filename, "r")))
-  {
-    Error(ERR_WARN, "cannot open configuration file '%s'", filename);
-    return NULL;
-  }
-
-  while(!feof(file))
-  {
-    /* read next line of input file */
-    if (!fgets(line, MAX_LINE_LEN, file))
-      break;
-
-    /* cut trailing comment or whitespace from input line */
-    for (line_ptr = line; *line_ptr; line_ptr++)
-    {
-      if (*line_ptr == '#' || *line_ptr == '\n' || *line_ptr == '\r')
-      {
-       *line_ptr = '\0';
-       break;
-      }
-    }
-
-    /* cut trailing whitespaces from input line */
-    for (line_ptr = &line[strlen(line)]; line_ptr > line; line_ptr--)
-      if ((*line_ptr == ' ' || *line_ptr == '\t') && line_ptr[1] == '\0')
-       *line_ptr = '\0';
-
-    /* ignore empty lines */
-    if (*line == '\0')
-      continue;
-
-    line_len = strlen(line);
-
-    /* cut leading whitespaces from token */
-    for (token = line; *token; token++)
-      if (*token != ' ' && *token != '\t')
-       break;
-
-    /* find end of token */
-    for (line_ptr = token; *line_ptr; line_ptr++)
-    {
-      if (*line_ptr == ' ' || *line_ptr == '\t' || *line_ptr == ':')
-      {
-       *line_ptr = '\0';
-       break;
-      }
-    }
-
-    if (line_ptr < line + line_len)
-      value = line_ptr + 1;
-    else
-      value = "\0";
-
-    /* cut leading whitespaces from value */
-    for (; *value; value++)
-      if (*value != ' ' && *value != '\t')
-       break;
-
-    if (*token && *value)
-      setTokenValue(setup_file_list, token, value);
-  }
-
-  fclose(file);
-
-  first_valid_list_entry = setup_file_list->next;
-
-  /* free empty list header */
-  setup_file_list->next = NULL;
-  freeSetupFileList(setup_file_list);
-
-  if (first_valid_list_entry == NULL)
-    Error(ERR_WARN, "configuration file '%s' is empty", filename);
-
-  return first_valid_list_entry;
-}
-
-static void checkSetupFileListIdentifier(struct SetupFileList *setup_file_list,
-                                        char *identifier)
-{
-  if (!setup_file_list)
-    return;
-
-  if (strcmp(setup_file_list->token, TOKEN_STR_FILE_IDENTIFIER) == 0)
-  {
-    if (strcmp(setup_file_list->value, identifier) != 0)
-    {
-      Error(ERR_WARN, "configuration file has wrong version");
-      return;
-    }
-    else
-      return;
-  }
-
-  if (setup_file_list->next)
-    checkSetupFileListIdentifier(setup_file_list->next, identifier);
-  else
-  {
-    Error(ERR_WARN, "configuration file has no version information");
-    return;
-  }
-}
-
 static void setLevelDirInfoToDefaults(struct LevelDirInfo *ldi)
 {
   ldi->filename = NULL;
+  ldi->fullpath = NULL;
+  ldi->basepath = NULL;
   ldi->name = getStringCopy(ANONYMOUS_NAME);
   ldi->name_short = NULL;
   ldi->name_sorting = NULL;
@@ -1412,11 +1572,55 @@ static void setLevelDirInfoToDefaults(struct LevelDirInfo *ldi)
   ldi->first_level = 0;
   ldi->last_level = 0;
   ldi->sort_priority = LEVELCLASS_UNDEFINED;   /* default: least priority */
-  ldi->readonly = TRUE;
+  ldi->level_group = FALSE;
+  ldi->parent_link = FALSE;
   ldi->user_defined = FALSE;
+  ldi->readonly = TRUE;
   ldi->color = 0;
   ldi->class_desc = NULL;
   ldi->handicap_level = 0;
+  ldi->cl_first = -1;
+  ldi->cl_cursor = -1;
+
+  ldi->node_parent = NULL;
+  ldi->node_group = NULL;
+  ldi->next = NULL;
+}
+
+static void setLevelDirInfoToDefaultsFromParent(struct LevelDirInfo *ldi,
+                                               struct LevelDirInfo *parent)
+{
+  if (parent == NULL)
+  {
+    setLevelDirInfoToDefaults(ldi);
+    return;
+  }
+
+  /* first copy all values from the parent structure ... */
+  *ldi = *parent;
+
+  /* ... then set all fields to default that cannot be inherited from parent.
+     This is especially important for all those fields that can be set from
+     the 'levelinfo.conf' config file, because the function 'setSetupInfo()'
+     calls 'free()' for all already set token values which requires that no
+     other structure's pointer may point to them!
+  */
+
+  ldi->filename = NULL;
+  ldi->fullpath = NULL;
+  ldi->basepath = NULL;
+  ldi->name = getStringCopy(ANONYMOUS_NAME);
+  ldi->name_short = NULL;
+  ldi->name_sorting = NULL;
+  ldi->author = getStringCopy(parent->author);
+  ldi->imported_from = getStringCopy(parent->imported_from);
+
+  ldi->level_group = FALSE;
+  ldi->parent_link = FALSE;
+
+  ldi->node_parent = parent;
+  ldi->node_group = NULL;
+  ldi->next = NULL;
 }
 
 static void setSetupInfoToDefaults(struct SetupInfo *si)
@@ -1440,6 +1644,7 @@ static void setSetupInfoToDefaults(struct SetupInfo *si)
   si->team_mode = FALSE;
   si->handicap = TRUE;
   si->time_limit = TRUE;
+  si->fullscreen = FALSE;
 
   for (i=0; i<MAX_PLAYERS; i++)
   {
@@ -1453,12 +1658,12 @@ static void setSetupInfoToDefaults(struct SetupInfo *si)
     si->input[i].joy.ylower  = JOYSTICK_YLOWER;
     si->input[i].joy.snap  = (i == 0 ? JOY_BUTTON_1 : 0);
     si->input[i].joy.bomb  = (i == 0 ? JOY_BUTTON_2 : 0);
-    si->input[i].key.left  = (i == 0 ? DEFAULT_KEY_LEFT  : KEY_UNDEFINDED);
-    si->input[i].key.right = (i == 0 ? DEFAULT_KEY_RIGHT : KEY_UNDEFINDED);
-    si->input[i].key.up    = (i == 0 ? DEFAULT_KEY_UP    : KEY_UNDEFINDED);
-    si->input[i].key.down  = (i == 0 ? DEFAULT_KEY_DOWN  : KEY_UNDEFINDED);
-    si->input[i].key.snap  = (i == 0 ? DEFAULT_KEY_SNAP  : KEY_UNDEFINDED);
-    si->input[i].key.bomb  = (i == 0 ? DEFAULT_KEY_BOMB  : KEY_UNDEFINDED);
+    si->input[i].key.left  = (i == 0 ? DEFAULT_KEY_LEFT  : KSYM_UNDEFINED);
+    si->input[i].key.right = (i == 0 ? DEFAULT_KEY_RIGHT : KSYM_UNDEFINED);
+    si->input[i].key.up    = (i == 0 ? DEFAULT_KEY_UP    : KSYM_UNDEFINED);
+    si->input[i].key.down  = (i == 0 ? DEFAULT_KEY_DOWN  : KSYM_UNDEFINED);
+    si->input[i].key.snap  = (i == 0 ? DEFAULT_KEY_SNAP  : KSYM_UNDEFINED);
+    si->input[i].key.bomb  = (i == 0 ? DEFAULT_KEY_BOMB  : KSYM_UNDEFINED);
   }
 }
 
@@ -1478,8 +1683,8 @@ static void setSetupInfo(int token_nr, char *token_value)
       *(boolean *)setup_value = get_string_boolean_value(token_value);
       break;
 
-    case TYPE_KEYSYM:
-      *(KeySym *)setup_value = getKeySymFromX11KeyName(token_value);
+    case TYPE_KEY:
+      *(Key *)setup_value = getKeyFromX11KeyName(token_value);
       break;
 
     case TYPE_INTEGER:
@@ -1529,27 +1734,15 @@ static void decodeSetupFileList(struct SetupFileList *setup_file_list)
   }
 }
 
-int getLevelSeriesNrFromLevelSeriesName(char *level_series_name)
-{
-  int i;
-
-  if (!level_series_name)
-    return 0;
-
-  for (i=0; i<num_leveldirs; i++)
-    if (strcmp(level_series_name, leveldir[i].filename) == 0)
-      return i;
-
-  return 0;
-}
-
 static int compareLevelDirInfoEntries(const void *object1, const void *object2)
 {
-  const struct LevelDirInfo *entry1 = object1;
-  const struct LevelDirInfo *entry2 = object2;
+  const struct LevelDirInfo *entry1 = *((struct LevelDirInfo **)object1);
+  const struct LevelDirInfo *entry2 = *((struct LevelDirInfo **)object2);
   int compare_result;
 
-  if (entry1->sort_priority == entry2->sort_priority)
+  if (entry1->parent_link || entry2->parent_link)
+    compare_result = (entry1->parent_link ? -1 : +1);
+  else if (entry1->sort_priority == entry2->sort_priority)
   {
     char *name1 = getStringToLower(entry1->name_sorting);
     char *name2 = getStringToLower(entry2->name_sorting);
@@ -1567,134 +1760,170 @@ static int compareLevelDirInfoEntries(const void *object1, const void *object2)
   return compare_result;
 }
 
-static int LoadLevelInfoFromLevelDir(char *level_directory, int start_entry)
+static void createParentLevelDirNode(struct LevelDirInfo *node_parent)
+{
+  struct LevelDirInfo *leveldir_new = newLevelDirInfo();
+
+  setLevelDirInfoToDefaults(leveldir_new);
+
+  leveldir_new->node_parent = node_parent;
+  leveldir_new->parent_link = TRUE;
+
+  leveldir_new->name = ".. (parent directory)";
+  leveldir_new->name_short = getStringCopy(leveldir_new->name);
+  leveldir_new->name_sorting = getStringCopy(leveldir_new->name);
+
+  leveldir_new->filename = "..";
+  leveldir_new->fullpath = getStringCopy(node_parent->fullpath);
+
+  leveldir_new->sort_priority = node_parent->sort_priority;
+  leveldir_new->class_desc = getLevelClassDescription(leveldir_new);
+
+  pushLevelDirInfo(&node_parent->node_group, leveldir_new);
+}
+
+static void LoadLevelInfoFromLevelDir(struct LevelDirInfo **node_first,
+                                     struct LevelDirInfo *node_parent,
+                                     char *level_directory)
 {
   DIR *dir;
-  struct stat file_status;
-  char *directory = NULL;
-  char *filename = NULL;
-  struct SetupFileList *setup_file_list = NULL;
   struct dirent *dir_entry;
-  int i, current_entry = start_entry;
+  boolean valid_entry_found = FALSE;
 
   if ((dir = opendir(level_directory)) == NULL)
   {
     Error(ERR_WARN, "cannot read level directory '%s'", level_directory);
-    return current_entry;
+    return;
   }
 
-  while (current_entry < MAX_LEVDIR_ENTRIES)
+  while ((dir_entry = readdir(dir)) != NULL)   /* loop until last dir entry */
   {
-    if ((dir_entry = readdir(dir)) == NULL)    /* last directory entry */
-      break;
+    struct SetupFileList *setup_file_list = NULL;
+    struct stat file_status;
+    char *directory_name = dir_entry->d_name;
+    char *directory_path = getPath2(level_directory, directory_name);
+    char *filename = NULL;
 
     /* skip entries for current and parent directory */
-    if (strcmp(dir_entry->d_name, ".")  == 0 ||
-       strcmp(dir_entry->d_name, "..") == 0)
+    if (strcmp(directory_name, ".")  == 0 ||
+       strcmp(directory_name, "..") == 0)
+    {
+      free(directory_path);
       continue;
+    }
 
     /* find out if directory entry is itself a directory */
-    directory = getPath2(level_directory, dir_entry->d_name);
-    if (stat(directory, &file_status) != 0 ||          /* cannot stat file */
+    if (stat(directory_path, &file_status) != 0 ||     /* cannot stat file */
        (file_status.st_mode & S_IFMT) != S_IFDIR)      /* not a directory */
     {
-      free(directory);
+      free(directory_path);
       continue;
     }
 
-    filename = getPath2(directory, LEVELINFO_FILENAME);
+    filename = getPath2(directory_path, LEVELINFO_FILENAME);
     setup_file_list = loadSetupFileList(filename);
 
     if (setup_file_list)
     {
-#if 0
-      DrawInitText(dir_entry->d_name, 150, FC_YELLOW);
-#endif
+      struct LevelDirInfo *leveldir_new = newLevelDirInfo();
+      int i;
 
       checkSetupFileListIdentifier(setup_file_list, LEVELINFO_COOKIE);
-      setLevelDirInfoToDefaults(&leveldir[current_entry]);
+      setLevelDirInfoToDefaultsFromParent(leveldir_new, node_parent);
 
-      ldi = leveldir[current_entry];
+      /* set all structure fields according to the token/value pairs */
+      ldi = *leveldir_new;
       for (i=FIRST_LEVELINFO_TOKEN; i<=LAST_LEVELINFO_TOKEN; i++)
        setSetupInfo(i, getTokenValue(setup_file_list, token_info[i].text));
-      leveldir[current_entry] = ldi;
+      *leveldir_new = ldi;
 
-#if 1
-      DrawInitText(leveldir[current_entry].name, 150, FC_YELLOW);
-#endif
+      DrawInitText(leveldir_new->name, 150, FC_YELLOW);
 
-      if (leveldir[current_entry].name_short == NULL)
-       leveldir[current_entry].name_short =
-         getStringCopy(leveldir[current_entry].name);
-
-      if (leveldir[current_entry].name_sorting == NULL)
-       leveldir[current_entry].name_sorting =
-         getStringCopy(leveldir[current_entry].name_short);
-
-      leveldir[current_entry].filename = getStringCopy(dir_entry->d_name);
-      leveldir[current_entry].last_level =
-       leveldir[current_entry].first_level +
-       leveldir[current_entry].levels - 1;
-      leveldir[current_entry].user_defined =
-       (level_directory == options.level_directory ? FALSE : TRUE);
-      leveldir[current_entry].color = LEVELCOLOR(&leveldir[current_entry]);
-      leveldir[current_entry].class_desc =
-       getLevelClassDescription(&leveldir[current_entry]);
-#if 0
-      leveldir[current_entry].handicap_level =
-       leveldir[current_entry].first_level;    /* default value */
-#else
-      leveldir[current_entry].handicap_level =
-       (leveldir[current_entry].user_defined ?
-        leveldir[current_entry].last_level :
-        leveldir[current_entry].first_level);
-#endif
+      if (leveldir_new->name_short == NULL)
+       leveldir_new->name_short = getStringCopy(leveldir_new->name);
+
+      if (leveldir_new->name_sorting == NULL)
+       leveldir_new->name_sorting = getStringCopy(leveldir_new->name);
+
+      leveldir_new->filename = getStringCopy(directory_name);
+
+      if (node_parent == NULL)         /* top level group */
+      {
+       leveldir_new->basepath = level_directory;
+       leveldir_new->fullpath = leveldir_new->filename;
+      }
+      else                             /* sub level group */
+      {
+       leveldir_new->basepath = node_parent->basepath;
+       leveldir_new->fullpath = getPath2(node_parent->fullpath,
+                                         directory_name);
+      }
+
+      if (leveldir_new->levels < 1)
+       leveldir_new->levels = 1;
+
+      leveldir_new->last_level =
+       leveldir_new->first_level + leveldir_new->levels - 1;
+
+      leveldir_new->user_defined =
+       (leveldir_new->basepath == options.level_directory ? FALSE : TRUE);
+
+      leveldir_new->color = LEVELCOLOR(leveldir_new);
+      leveldir_new->class_desc = getLevelClassDescription(leveldir_new);
+
+      leveldir_new->handicap_level =   /* set handicap to default value */
+       (leveldir_new->user_defined ?
+        leveldir_new->last_level :
+        leveldir_new->first_level);
+
+      pushLevelDirInfo(node_first, leveldir_new);
 
       freeSetupFileList(setup_file_list);
-      current_entry++;
+      valid_entry_found = TRUE;
+
+      if (leveldir_new->level_group)
+      {
+       /* create node to link back to current level directory */
+       createParentLevelDirNode(leveldir_new);
+
+       /* step into sub-directory and look for more level series */
+       LoadLevelInfoFromLevelDir(&leveldir_new->node_group,
+                                 leveldir_new, directory_path);
+      }
     }
     else
-      Error(ERR_WARN, "ignoring level directory '%s'", directory);
+      Error(ERR_WARN, "ignoring level directory '%s'", directory_path);
 
-    free(directory);
+    free(directory_path);
     free(filename);
   }
 
   closedir(dir);
 
-  if (current_entry == MAX_LEVDIR_ENTRIES)
-  {
-    Error(ERR_WARN, "maximum of %d level directories reached", current_entry);
-    Error(ERR_WARN, "remaining level directories ignored in directory '%s'",
-         level_directory);
-  }
-  else if (current_entry == start_entry)
+  if (!valid_entry_found)
     Error(ERR_WARN, "cannot find any valid level series in directory '%s'",
          level_directory);
-
-  return current_entry;
 }
 
 void LoadLevelInfo()
 {
   InitUserLevelDirectory(getLoginName());
 
-  num_leveldirs = 0;
-  leveldir_nr = 0;
-
   DrawInitText("Loading level series:", 120, FC_GREEN);
 
-  num_leveldirs = LoadLevelInfoFromLevelDir(options.level_directory,
-                                           num_leveldirs);
-  num_leveldirs = LoadLevelInfoFromLevelDir(getUserLevelDir(""),
-                                           num_leveldirs);
+  LoadLevelInfoFromLevelDir(&leveldir_first, NULL, options.level_directory);
+  LoadLevelInfoFromLevelDir(&leveldir_first, NULL, getUserLevelDir(""));
+
+  leveldir_current = getFirstValidLevelSeries(leveldir_first);
 
-  if (num_leveldirs == 0)
+  if (leveldir_first == NULL)
     Error(ERR_EXIT, "cannot find any valid level series in any directory");
 
-  if (num_leveldirs > 1)
-    qsort(leveldir, num_leveldirs, sizeof(struct LevelDirInfo),
-         compareLevelDirInfoEntries);
+  sortLevelDirInfo(&leveldir_first, compareLevelDirInfoEntries);
+
+#if 0
+  dumpLevelDirInfo(leveldir_first, 0);
+#endif
 }
 
 static void SaveUserLevelInfo()
@@ -1705,7 +1934,7 @@ static void SaveUserLevelInfo()
 
   filename = getPath2(getUserLevelDir(getLoginName()), LEVELINFO_FILENAME);
 
-  if (!(file = fopen(filename, "w")))
+  if (!(file = fopen(filename, MODE_WRITE)))
   {
     Error(ERR_WARN, "cannot write level info file '%s'", filename);
     free(filename);
@@ -1734,7 +1963,7 @@ static void SaveUserLevelInfo()
   fclose(file);
   free(filename);
 
-  chmod(filename, SETUP_PERMS);
+  SetFilePermissions(filename, PERMS_PRIVATE);
 }
 
 void LoadSetup()
@@ -1800,12 +2029,12 @@ static char *getSetupLine(char *prefix, int token_nr)
       strcat(entry, (*(boolean *)setup_value ? "on" : "off"));
       break;
 
-    case TYPE_KEYSYM:
+    case TYPE_KEY:
       {
-       KeySym keysym = *(KeySym *)setup_value;
-       char *keyname = getKeyNameFromKeySym(keysym);
+       Key key = *(Key *)setup_value;
+       char *keyname = getKeyNameFromKey(key);
 
-       strcat(entry, getX11KeyNameFromKeySym(keysym));
+       strcat(entry, getX11KeyNameFromKey(key));
        for (i=strlen(entry); i<50; i++)
          strcat(entry, " ");
 
@@ -1849,7 +2078,7 @@ void SaveSetup()
 
   filename = getPath2(getSetupDir(), SETUP_FILENAME);
 
-  if (!(file = fopen(filename, "w")))
+  if (!(file = fopen(filename, MODE_WRITE)))
   {
     Error(ERR_WARN, "cannot write setup file '%s'", filename);
     free(filename);
@@ -1887,7 +2116,7 @@ void SaveSetup()
   fclose(file);
   free(filename);
 
-  chmod(filename, SETUP_PERMS);
+  SetFilePermissions(filename, PERMS_PRIVATE);
 }
 
 void LoadLevelSetup_LastSeries()
@@ -1896,7 +2125,7 @@ void LoadLevelSetup_LastSeries()
   struct SetupFileList *level_setup_list = NULL;
 
   /* always start with reliable default values */
-  leveldir_nr = 0;
+  leveldir_current = getFirstValidLevelSeries(leveldir_first);
 
   /* ----------------------------------------------------------------------- */
   /* ~/.rocksndiamonds/levelsetup.conf                                       */
@@ -1909,7 +2138,9 @@ void LoadLevelSetup_LastSeries()
     char *last_level_series =
       getTokenValue(level_setup_list, TOKEN_STR_LAST_LEVEL_SERIES);
 
-    leveldir_nr = getLevelSeriesNrFromLevelSeriesName(last_level_series);
+    leveldir_current = getLevelDirInfoFromFilename(last_level_series);
+    if (leveldir_current == NULL)
+      leveldir_current = leveldir_first;
 
     checkSetupFileListIdentifier(level_setup_list, LEVELSETUP_COOKIE);
 
@@ -1924,7 +2155,7 @@ void LoadLevelSetup_LastSeries()
 void SaveLevelSetup_LastSeries()
 {
   char *filename;
-  char *level_subdir = leveldir[leveldir_nr].filename;
+  char *level_subdir = leveldir_current->filename;
   FILE *file;
 
   /* ----------------------------------------------------------------------- */
@@ -1935,7 +2166,7 @@ void SaveLevelSetup_LastSeries()
 
   filename = getPath2(getSetupDir(), LEVELSETUP_FILENAME);
 
-  if (!(file = fopen(filename, "w")))
+  if (!(file = fopen(filename, MODE_WRITE)))
   {
     Error(ERR_WARN, "cannot write setup file '%s'", filename);
     free(filename);
@@ -1950,10 +2181,10 @@ void SaveLevelSetup_LastSeries()
   fclose(file);
   free(filename);
 
-  chmod(filename, SETUP_PERMS);
+  SetFilePermissions(filename, PERMS_PRIVATE);
 }
 
-static void checkSeriesInfo(int leveldir_nr)
+static void checkSeriesInfo()
 {
   static char *level_directory = NULL;
   DIR *dir;
@@ -1961,10 +2192,10 @@ static void checkSeriesInfo(int leveldir_nr)
 
   /* check for more levels besides the 'levels' field of 'levelinfo.conf' */
 
-  level_directory = getPath2((leveldir[leveldir_nr].user_defined ?
+  level_directory = getPath2((leveldir_current->user_defined ?
                              getUserLevelDir("") :
                              options.level_directory),
-                            leveldir[leveldir_nr].filename);
+                            leveldir_current->fullpath);
 
   if ((dir = opendir(level_directory)) == NULL)
   {
@@ -1986,15 +2217,15 @@ static void checkSeriesInfo(int leveldir_nr)
 
       levelnum_value = atoi(levelnum_str);
 
-      if (levelnum_value < leveldir[leveldir_nr].first_level)
+      if (levelnum_value < leveldir_current->first_level)
       {
        Error(ERR_WARN, "additional level %d found", levelnum_value);
-       leveldir[leveldir_nr].first_level = levelnum_value;
+       leveldir_current->first_level = levelnum_value;
       }
-      else if (levelnum_value > leveldir[leveldir_nr].last_level)
+      else if (levelnum_value > leveldir_current->last_level)
       {
        Error(ERR_WARN, "additional level %d found", levelnum_value);
-       leveldir[leveldir_nr].last_level = levelnum_value;
+       leveldir_current->last_level = levelnum_value;
       }
     }
   }
@@ -2002,27 +2233,22 @@ static void checkSeriesInfo(int leveldir_nr)
   closedir(dir);
 }
 
-void LoadLevelSetup_SeriesInfo(int leveldir_nr)
+void LoadLevelSetup_SeriesInfo()
 {
   char *filename;
   struct SetupFileList *level_setup_list = NULL;
-  char *level_subdir = leveldir[leveldir_nr].filename;
+  char *level_subdir = leveldir_current->filename;
 
   /* always start with reliable default values */
-#if 0
-  level_nr = 0;
-  leveldir[leveldir_nr].handicap_level = 0;
-#else
-  level_nr = leveldir[leveldir_nr].first_level;
-#endif
+  level_nr = leveldir_current->first_level;
 
-  checkSeriesInfo(leveldir_nr);
+  checkSeriesInfo(leveldir_current);
 
   /* ----------------------------------------------------------------------- */
   /* ~/.rocksndiamonds/levelsetup/<level series>/levelsetup.conf             */
   /* ----------------------------------------------------------------------- */
 
-  level_subdir = leveldir[leveldir_nr].filename;
+  level_subdir = leveldir_current->filename;
 
   filename = getPath2(getLevelSetupDir(level_subdir), LEVELSETUP_FILENAME);
 
@@ -2036,10 +2262,10 @@ void LoadLevelSetup_SeriesInfo(int leveldir_nr)
     {
       level_nr = atoi(token_value);
 
-      if (level_nr < leveldir[leveldir_nr].first_level)
-       level_nr = leveldir[leveldir_nr].first_level;
-      if (level_nr > leveldir[leveldir_nr].last_level)
-       level_nr = leveldir[leveldir_nr].last_level;
+      if (level_nr < leveldir_current->first_level)
+       level_nr = leveldir_current->first_level;
+      if (level_nr > leveldir_current->last_level)
+       level_nr = leveldir_current->last_level;
     }
 
     token_value = getTokenValue(level_setup_list, TOKEN_STR_HANDICAP_LEVEL);
@@ -2048,15 +2274,15 @@ void LoadLevelSetup_SeriesInfo(int leveldir_nr)
     {
       int level_nr = atoi(token_value);
 
-      if (level_nr < leveldir[leveldir_nr].first_level)
-       level_nr = leveldir[leveldir_nr].first_level;
-      if (level_nr > leveldir[leveldir_nr].last_level + 1)
-       level_nr = leveldir[leveldir_nr].last_level;
+      if (level_nr < leveldir_current->first_level)
+       level_nr = leveldir_current->first_level;
+      if (level_nr > leveldir_current->last_level + 1)
+       level_nr = leveldir_current->last_level;
 
-      if (leveldir[leveldir_nr].user_defined)
-       level_nr = leveldir[leveldir_nr].last_level;
+      if (leveldir_current->user_defined)
+       level_nr = leveldir_current->last_level;
 
-      leveldir[leveldir_nr].handicap_level = level_nr;
+      leveldir_current->handicap_level = level_nr;
     }
 
     checkSetupFileListIdentifier(level_setup_list, LEVELSETUP_COOKIE);
@@ -2069,12 +2295,12 @@ void LoadLevelSetup_SeriesInfo(int leveldir_nr)
   free(filename);
 }
 
-void SaveLevelSetup_SeriesInfo(int leveldir_nr)
+void SaveLevelSetup_SeriesInfo()
 {
   char *filename;
-  char *level_subdir = leveldir[leveldir_nr].filename;
+  char *level_subdir = leveldir_current->filename;
   char *level_nr_str = int2str(level_nr, 0);
-  char *handicap_level_str = int2str(leveldir[leveldir_nr].handicap_level, 0);
+  char *handicap_level_str = int2str(leveldir_current->handicap_level, 0);
   FILE *file;
 
   /* ----------------------------------------------------------------------- */
@@ -2085,7 +2311,7 @@ void SaveLevelSetup_SeriesInfo(int leveldir_nr)
 
   filename = getPath2(getLevelSetupDir(level_subdir), LEVELSETUP_FILENAME);
 
-  if (!(file = fopen(filename, "w")))
+  if (!(file = fopen(filename, MODE_WRITE)))
   {
     Error(ERR_WARN, "cannot write setup file '%s'", filename);
     free(filename);
@@ -2102,48 +2328,5 @@ void SaveLevelSetup_SeriesInfo(int leveldir_nr)
   fclose(file);
   free(filename);
 
-  chmod(filename, SETUP_PERMS);
-}
-
-#ifdef MSDOS
-void initErrorFile()
-{
-  char *filename;
-
-  InitUserDataDirectory();
-
-  filename = getPath2(getUserDataDir(), ERROR_FILENAME);
-  unlink(filename);
-  free(filename);
-}
-
-FILE *openErrorFile()
-{
-  char *filename;
-  FILE *error_file;
-
-  filename = getPath2(getUserDataDir(), ERROR_FILENAME);
-  error_file = fopen(filename, "a");
-  free(filename);
-
-  return error_file;
-}
-
-void dumpErrorFile()
-{
-  char *filename;
-  FILE *error_file;
-
-  filename = getPath2(getUserDataDir(), ERROR_FILENAME);
-  error_file = fopen(filename, "r");
-  free(filename);
-
-  if (error_file != NULL)
-  {
-    while (!feof(error_file))
-      fputc(fgetc(error_file), stderr);
-
-    fclose(error_file);
-  }
+  SetFilePermissions(filename, PERMS_PRIVATE);
 }
-#endif