X-Git-Url: https://git.artsoft.org/?p=rocksndiamonds.git;a=blobdiff_plain;f=src%2Flibgame%2Fmisc.c;h=81ec00e7a1cc2245f1dd573d100a3c6e38296f48;hp=c04c256dd4989c54d363fb06fb958e90732f581b;hb=a8816d6e5319f9ec26a45346b08250f61e95c011;hpb=f2d0f3fed679ea3573f51aa298adce2d9a78d8be

diff --git a/src/libgame/misc.c b/src/libgame/misc.c
index c04c256d..81ec00e7 100644
--- a/src/libgame/misc.c
+++ b/src/libgame/misc.c
@@ -1,7 +1,7 @@
 /***********************************************************
 * Artsoft Retro-Game Library                               *
 *----------------------------------------------------------*
-* (c) 1994-2002 Artsoft Entertainment                      *
+* (c) 1994-2006 Artsoft Entertainment                      *
 *               Holger Schemel                             *
 *               Detmolder Strasse 189                      *
 *               33604 Bielefeld                            *
@@ -14,10 +14,12 @@
 #include <time.h>
 #include <sys/time.h>
 #include <sys/types.h>
+#include <sys/stat.h>
 #include <stdarg.h>
 #include <ctype.h>
 #include <string.h>
 #include <unistd.h>
+#include <errno.h>
 
 #include "platform.h"
 
@@ -33,32 +35,83 @@
 #include "image.h"
 
 
-/* ------------------------------------------------------------------------- */
+/* ========================================================================= */
 /* some generic helper functions                                             */
+/* ========================================================================= */
+
 /* ------------------------------------------------------------------------- */
+/* platform independent wrappers for printf() et al. (newline aware)         */
+/* ------------------------------------------------------------------------- */
+
+#if defined(PLATFORM_ANDROID)
+static int android_log_prio = ANDROID_LOG_INFO;
+#endif
+
+#if 0
+static void vfPrintLog(FILE *stream, char *format, va_list ap)
+{
+}
+
+static void vfPrintLog(FILE *stream, char *format, va_list ap)
+{
+}
+
+static void fPrintLog(FILE *stream, char *format, va_list ap)
+{
+}
+
+static void fPrintLog(FILE *stream, char *format, va_list ap)
+{
+}
+#endif
+
+static void vfprintf_newline(FILE *stream, char *format, va_list ap)
+{
+#if defined(PLATFORM_ANDROID)
+  __android_log_vprint(android_log_prio, program.program_title, format, ap);
+#else
+  char *newline = STRING_NEWLINE;
+
+  vfprintf(stream, format, ap);
+  fprintf(stream, "%s", newline);
+#endif
+}
+
+static void fprintf_newline(FILE *stream, char *format, ...)
+{
+  va_list ap;
+
+  va_start(ap, format);
+  vfprintf_newline(stream, format, ap);
+  va_end(ap);
+}
 
-void fprintf_line(FILE *stream, char *line_string, int line_length)
+void fprintf_line(FILE *stream, char *line_chars, int line_length)
 {
   int i;
 
   for (i = 0; i < line_length; i++)
-    fprintf(stream, "%s", line_string);
+    fprintf(stream, "%s", line_chars);
 
-  fprintf(stream, "\n");
+  fprintf_newline(stream, "");
 }
 
-void printf_line(char *line_string, int line_length)
+void printf_line(char *line_chars, int line_length)
 {
-  fprintf_line(stdout, line_string, line_length);
+  fprintf_line(stdout, line_chars, line_length);
 }
 
-void printf_line_with_prefix(char *prefix, char *line_string, int line_length)
+void printf_line_with_prefix(char *prefix, char *line_chars, int line_length)
 {
   fprintf(stdout, "%s", prefix);
-  fprintf_line(stdout, line_string, line_length);
+  fprintf_line(stdout, line_chars, line_length);
 }
 
 
+/* ------------------------------------------------------------------------- */
+/* string functions                                                          */
+/* ------------------------------------------------------------------------- */
+
 /* int2str() returns a number converted to a string;
    the used memory is static, but will be overwritten by later calls,
    so if you want to save the result, copy it to a private string buffer;
@@ -77,7 +130,7 @@ char *int2str(int number, int size)
   if (size > 20)
     size = 20;
 
-  if (size)
+  if (size > 0)
   {
     sprintf(s, "                    %09d", number);
     return &s[strlen(s) - size];
@@ -127,13 +180,18 @@ int log_2(unsigned int x)
   return e;
 }
 
+boolean getTokenValueFromString(char *string, char **token, char **value)
+{
+  return getTokenValueFromSetupLine(string, token, value);
+}
+
 
 /* ------------------------------------------------------------------------- */
 /* counter functions                                                         */
 /* ------------------------------------------------------------------------- */
 
 #if defined(PLATFORM_MSDOS)
-volatile unsigned long counter = 0;
+volatile unsigned int counter = 0;
 
 void increment_counter()
 {
@@ -147,12 +205,52 @@ END_OF_FUNCTION(increment_counter);
 /* maximal allowed length of a command line option */
 #define MAX_OPTION_LEN		256
 
-#ifdef TARGET_SDL
-static unsigned long mainCounter(int mode)
+#if 1
+
+#if defined(TARGET_SDL)
+static unsigned int getCurrentMS()
+{
+  return SDL_GetTicks();
+}
+
+#else /* !TARGET_SDL */
+
+#if defined(PLATFORM_UNIX)
+static unsigned int getCurrentMS()
+{
+  struct timeval current_time;
+
+  gettimeofday(&current_time, NULL);
+
+  return current_time.tv_sec * 1000 + current_time.tv_usec / 1000;
+}
+#endif /* PLATFORM_UNIX */
+#endif /* !TARGET_SDL */
+
+static unsigned int mainCounter(int mode)
+{
+  static unsigned int base_ms = 0;
+  unsigned int current_ms;
+
+  /* get current system milliseconds */
+  current_ms = getCurrentMS();
+
+  /* reset base timestamp in case of counter reset or wrap-around */
+  if (mode == INIT_COUNTER || current_ms < base_ms)
+    base_ms = current_ms;
+
+  /* return milliseconds since last counter reset */
+  return current_ms - base_ms;
+}
+
+#else
+
+#if defined(TARGET_SDL)
+static unsigned int mainCounter(int mode)
 {
-  static unsigned long base_ms = 0;
-  unsigned long current_ms;
-  unsigned long counter_ms;
+  static unsigned int base_ms = 0;
+  unsigned int current_ms;
+  unsigned int counter_ms;
 
   current_ms = SDL_GetTicks();
 
@@ -168,11 +266,11 @@ static unsigned long mainCounter(int mode)
 #else /* !TARGET_SDL */
 
 #if defined(PLATFORM_UNIX)
-static unsigned long mainCounter(int mode)
+static unsigned int mainCounter(int mode)
 {
   static struct timeval base_time = { 0, 0 };
   struct timeval current_time;
-  unsigned long counter_ms;
+  unsigned int counter_ms;
 
   gettimeofday(&current_time, NULL);
 
@@ -188,6 +286,8 @@ static unsigned long mainCounter(int mode)
 #endif /* PLATFORM_UNIX */
 #endif /* !TARGET_SDL */
 
+#endif
+
 void InitCounter()		/* set counter back to zero */
 {
 #if !defined(PLATFORM_MSDOS)
@@ -199,7 +299,7 @@ void InitCounter()		/* set counter back to zero */
 #endif
 }
 
-unsigned long Counter()	/* get milliseconds since last call of InitCounter() */
+unsigned int Counter()	/* get milliseconds since last call of InitCounter() */
 {
 #if !defined(PLATFORM_MSDOS)
   return mainCounter(READ_COUNTER);
@@ -208,7 +308,7 @@ unsigned long Counter()	/* get milliseconds since last call of InitCounter() */
 #endif
 }
 
-static void sleep_milliseconds(unsigned long milliseconds_delay)
+static void sleep_milliseconds(unsigned int milliseconds_delay)
 {
   boolean do_busy_waiting = (milliseconds_delay < 5 ? TRUE : FALSE);
 
@@ -219,7 +319,7 @@ static void sleep_milliseconds(unsigned long milliseconds_delay)
        therefore it's better to do a short interval of busy waiting
        to get our sleeping time more accurate */
 
-    unsigned long base_counter = Counter(), actual_counter = Counter();
+    unsigned int base_counter = Counter(), actual_counter = Counter();
 
     while (actual_counter < base_counter + milliseconds_delay &&
 	   actual_counter >= base_counter)
@@ -243,15 +343,15 @@ static void sleep_milliseconds(unsigned long milliseconds_delay)
   }
 }
 
-void Delay(unsigned long delay)	/* Sleep specified number of milliseconds */
+void Delay(unsigned int delay)	/* Sleep specified number of milliseconds */
 {
   sleep_milliseconds(delay);
 }
 
-boolean FrameReached(unsigned long *frame_counter_var,
-		     unsigned long frame_delay)
+boolean FrameReached(unsigned int *frame_counter_var,
+		     unsigned int frame_delay)
 {
-  unsigned long actual_frame_counter = FrameCounter;
+  unsigned int actual_frame_counter = FrameCounter;
 
   if (actual_frame_counter >= *frame_counter_var &&
       actual_frame_counter < *frame_counter_var + frame_delay)
@@ -262,10 +362,10 @@ boolean FrameReached(unsigned long *frame_counter_var,
   return TRUE;
 }
 
-boolean DelayReached(unsigned long *counter_var,
-		     unsigned long delay)
+boolean DelayReached(unsigned int *counter_var,
+		     unsigned int delay)
 {
-  unsigned long actual_counter = Counter();
+  unsigned int actual_counter = Counter();
 
   if (actual_counter >= *counter_var &&
       actual_counter < *counter_var + delay)
@@ -276,9 +376,9 @@ boolean DelayReached(unsigned long *counter_var,
   return TRUE;
 }
 
-void WaitUntilDelayReached(unsigned long *counter_var, unsigned long delay)
+void WaitUntilDelayReached(unsigned int *counter_var, unsigned int delay)
 {
-  unsigned long actual_counter;
+  unsigned int actual_counter;
 
   while (1)
   {
@@ -299,17 +399,30 @@ void WaitUntilDelayReached(unsigned long *counter_var, unsigned long delay)
 /* random generator functions                                                */
 /* ------------------------------------------------------------------------- */
 
-unsigned int init_random_number(int nr, long seed)
+unsigned int init_random_number(int nr, int seed)
 {
   if (seed == NEW_RANDOMIZE)
   {
-#if defined(TARGET_SDL)
-    seed = (long)SDL_GetTicks();
-#else
+    /* default random seed */
+    seed = (int)time(NULL);			// seconds since the epoch
+
+#if !defined(PLATFORM_WIN32)
+    /* add some more randomness */
     struct timeval current_time;
 
     gettimeofday(&current_time, NULL);
-    seed = (long)current_time.tv_usec;
+
+    seed += (int)current_time.tv_usec;		// microseconds since the epoch
+#endif
+
+#if defined(TARGET_SDL)
+    /* add some more randomness */
+    seed += (int)SDL_GetTicks();		// milliseconds since SDL init
+#endif
+
+#if 1
+    /* add some more randomness */
+    seed += GetSimpleRandom(1000000);
 #endif
   }
 
@@ -336,7 +449,7 @@ static char *get_corrected_real_name(char *real_name)
   char *to_ptr   = real_name_new;
 
   /* copy the name string, but not more than MAX_USERNAME_LEN characters */
-  while (*from_ptr && (long)(to_ptr - real_name_new) < MAX_USERNAME_LEN - 1)
+  while (*from_ptr && (int)(to_ptr - real_name_new) < MAX_USERNAME_LEN - 1)
   {
     /* the name field read from "passwd" file may also contain additional
        user information, separated by commas, which will be removed here */
@@ -404,7 +517,7 @@ char *getRealName()
     else
       real_name = ANONYMOUS_NAME;
   }
-#elif defined(PLATFORM_UNIX)
+#elif defined(PLATFORM_UNIX) && !defined(PLATFORM_ANDROID)
   if (real_name == NULL)
   {
     struct passwd *pwd;
@@ -421,36 +534,14 @@ char *getRealName()
   return real_name;
 }
 
-char *getHomeDir()
+time_t getFileTimestampEpochSeconds(char *filename)
 {
-  static char *dir = NULL;
+  struct stat file_status;
 
-#if defined(PLATFORM_WIN32)
-  if (dir == NULL)
-  {
-    dir = checked_malloc(MAX_PATH + 1);
-
-    if (!SUCCEEDED(SHGetFolderPath(NULL, CSIDL_PERSONAL, NULL, 0, dir)))
-      strcpy(dir, ".");
-  }
-#elif defined(PLATFORM_UNIX)
-  if (dir == NULL)
-  {
-    if ((dir = getenv("HOME")) == NULL)
-    {
-      struct passwd *pwd;
+  if (stat(filename, &file_status) != 0)	/* cannot stat file */
+    return 0;
 
-      if ((pwd = getpwuid(getuid())) != NULL)
-	dir = getStringCopy(pwd->pw_dir);
-      else
-	dir = ".";
-    }
-  }
-#else
-  dir = ".";
-#endif
-
-  return dir;
+  return file_status.st_mtime;
 }
 
 
@@ -460,17 +551,15 @@ char *getHomeDir()
 
 static char *getLastPathSeparatorPtr(char *filename)
 {
-  char *last_separator = strrchr(filename, '/');
+  char *last_separator = strrchr(filename, CHAR_PATH_SEPARATOR_UNIX);
 
-#if !defined(PLATFORM_UNIX)
   if (last_separator == NULL)	/* also try DOS/Windows variant */
-    last_separator = strrchr(filename, '\\');
-#endif
+    last_separator = strrchr(filename, CHAR_PATH_SEPARATOR_DOS);
 
   return last_separator;
 }
 
-static char *getBaseNamePtr(char *filename)
+char *getBaseNamePtr(char *filename)
 {
   char *last_separator = getLastPathSeparatorPtr(filename);
 
@@ -498,39 +587,92 @@ char *getBasePath(char *filename)
   return basepath;
 }
 
+static char *getProgramMainDataPath()
+{
+  char *main_data_path = getStringCopy(program.command_basepath);
+
+#if defined(PLATFORM_MACOSX)
+  static char *main_data_binary_subdir = NULL;
+
+  if (main_data_binary_subdir == NULL)
+  {
+    main_data_binary_subdir = checked_malloc(strlen(program.program_title) + 1 +
+					     strlen("app") + 1 +
+					     strlen(MAC_APP_BINARY_SUBDIR) + 1);
+
+    sprintf(main_data_binary_subdir, "%s.app/%s",
+	    program.program_title, MAC_APP_BINARY_SUBDIR);
+  }
+
+  // cut relative path to Mac OS X application binary directory from path
+  if (strSuffix(main_data_path, main_data_binary_subdir))
+    main_data_path[strlen(main_data_path) -
+		   strlen(main_data_binary_subdir)] = '\0';
+
+  // cut trailing path separator from path (but not if path is root directory)
+  if (strSuffix(main_data_path, "/") && !strEqual(main_data_path, "/"))
+    main_data_path[strlen(main_data_path) - 1] = '\0';
+#endif
+
+  return main_data_path;
+}
+
 
 /* ------------------------------------------------------------------------- */
 /* various string functions                                                  */
 /* ------------------------------------------------------------------------- */
 
-char *getPath2(char *path1, char *path2)
+char *getStringCat2WithSeparator(char *s1, char *s2, char *sep)
 {
-  char *complete_path = checked_malloc(strlen(path1) + 1 +
-				       strlen(path2) + 1);
+  char *complete_string = checked_malloc(strlen(s1) + strlen(sep) +
+					 strlen(s2) + 1);
 
-  sprintf(complete_path, "%s/%s", path1, path2);
+  sprintf(complete_string, "%s%s%s", s1, sep, s2);
 
-  return complete_path;
+  return complete_string;
 }
 
-char *getPath3(char *path1, char *path2, char *path3)
+char *getStringCat3WithSeparator(char *s1, char *s2, char *s3, char *sep)
 {
-  char *complete_path = checked_malloc(strlen(path1) + 1 +
-				       strlen(path2) + 1 +
-				       strlen(path3) + 1);
+  char *complete_string = checked_malloc(strlen(s1) + strlen(sep) +
+					 strlen(s2) + strlen(sep) +
+					 strlen(s3) + 1);
 
-  sprintf(complete_path, "%s/%s/%s", path1, path2, path3);
+  sprintf(complete_string, "%s%s%s%s%s", s1, sep, s2, sep, s3);
 
-  return complete_path;
+  return complete_string;
 }
 
 char *getStringCat2(char *s1, char *s2)
 {
-  char *complete_string = checked_malloc(strlen(s1) + strlen(s2) + 1);
+  return getStringCat2WithSeparator(s1, s2, "");
+}
 
-  sprintf(complete_string, "%s%s", s1, s2);
+char *getStringCat3(char *s1, char *s2, char *s3)
+{
+  return getStringCat3WithSeparator(s1, s2, s3, "");
+}
 
-  return complete_string;
+char *getPath2(char *path1, char *path2)
+{
+#if defined(PLATFORM_ANDROID)
+  // workaround for reading from APK assets directory -- skip leading "./"
+  if (strEqual(path1, "."))
+    return getStringCopy(path2);
+#endif
+
+  return getStringCat2WithSeparator(path1, path2, STRING_PATH_SEPARATOR);
+}
+
+char *getPath3(char *path1, char *path2, char *path3)
+{
+#if defined(PLATFORM_ANDROID)
+  // workaround for reading from APK assets directory -- skip leading "./"
+  if (strEqual(path1, "."))
+    return getStringCat2WithSeparator(path2, path3, STRING_PATH_SEPARATOR);
+#endif
+
+  return getStringCat3WithSeparator(path1, path2, path3, STRING_PATH_SEPARATOR);
 }
 
 char *getStringCopy(char *s)
@@ -546,6 +688,21 @@ char *getStringCopy(char *s)
   return s_copy;
 }
 
+char *getStringCopyN(char *s, int n)
+{
+  char *s_copy;
+  int s_len = MAX(0, n);
+
+  if (s == NULL)
+    return NULL;
+
+  s_copy = checked_malloc(s_len + 1);
+  strncpy(s_copy, s, s_len);
+  s_copy[s_len] = '\0';
+
+  return s_copy;
+}
+
 char *getStringToLower(char *s)
 {
   char *s_copy = checked_malloc(strlen(s) + 1);
@@ -573,6 +730,51 @@ boolean strEqual(char *s1, char *s2)
 	  strcmp(s1, s2) == 0);
 }
 
+boolean strEqualN(char *s1, char *s2, int n)
+{
+  return (s1 == NULL && s2 == NULL ? TRUE  :
+	  s1 == NULL && s2 != NULL ? FALSE :
+	  s1 != NULL && s2 == NULL ? FALSE :
+	  strncmp(s1, s2, n) == 0);
+}
+
+boolean strPrefix(char *s, char *prefix)
+{
+  return (s == NULL && prefix == NULL ? TRUE  :
+	  s == NULL && prefix != NULL ? FALSE :
+	  s != NULL && prefix == NULL ? FALSE :
+	  strncmp(s, prefix, strlen(prefix)) == 0);
+}
+
+boolean strSuffix(char *s, char *suffix)
+{
+  return (s == NULL && suffix == NULL ? TRUE  :
+	  s == NULL && suffix != NULL ? FALSE :
+	  s != NULL && suffix == NULL ? FALSE :
+	  strlen(s) < strlen(suffix)  ? FALSE :
+	  strncmp(&s[strlen(s) - strlen(suffix)], suffix, strlen(suffix)) == 0);
+}
+
+boolean strPrefixLower(char *s, char *prefix)
+{
+  char *s_lower = getStringToLower(s);
+  boolean match = strPrefix(s_lower, prefix);
+
+  free(s_lower);
+
+  return match;
+}
+
+boolean strSuffixLower(char *s, char *suffix)
+{
+  char *s_lower = getStringToLower(s);
+  boolean match = strSuffix(s_lower, suffix);
+
+  free(s_lower);
+
+  return match;
+}
+
 
 /* ------------------------------------------------------------------------- */
 /* command line option handling functions                                    */
@@ -584,6 +786,18 @@ void GetOptions(char *argv[], void (*print_usage_function)(void))
   char *rw_base_path = RW_BASE_PATH;
   char **options_left = &argv[1];
 
+#if 1
+  /* if the program is configured to start from current directory (default),
+     determine program package directory from program binary (some versions
+     of KDE/Konqueror and Mac OS X (especially "Mavericks") apparently do not
+     set the current working directory to the program package directory) */
+
+  if (strEqual(ro_base_path, "."))
+    ro_base_path = getProgramMainDataPath();
+  if (strEqual(rw_base_path, "."))
+    rw_base_path = getProgramMainDataPath();
+#else
+
 #if !defined(PLATFORM_MACOSX)
   /* if the program is configured to start from current directory (default),
      determine program package directory (KDE/Konqueror does not do this by
@@ -595,12 +809,15 @@ void GetOptions(char *argv[], void (*print_usage_function)(void))
     ro_base_path = program.command_basepath;
   if (strEqual(rw_base_path, "."))
     rw_base_path = program.command_basepath;
+#endif
+
 #endif
 
   /* initialize global program options */
   options.display_name = NULL;
   options.server_host = NULL;
   options.server_port = 0;
+
   options.ro_base_directory = ro_base_path;
   options.rw_base_directory = rw_base_path;
   options.level_directory    = getPath2(ro_base_path, LEVELS_DIRECTORY);
@@ -608,15 +825,23 @@ void GetOptions(char *argv[], void (*print_usage_function)(void))
   options.sounds_directory   = getPath2(ro_base_path, SOUNDS_DIRECTORY);
   options.music_directory    = getPath2(ro_base_path, MUSIC_DIRECTORY);
   options.docs_directory     = getPath2(ro_base_path, DOCS_DIRECTORY);
+
   options.execute_command = NULL;
+  options.special_flags = NULL;
+
   options.serveronly = FALSE;
   options.network = FALSE;
   options.verbose = FALSE;
   options.debug = FALSE;
+  options.debug_x11_sync = FALSE;
 
+#if 1
+  options.verbose = TRUE;
+#else
 #if !defined(PLATFORM_UNIX)
   if (*options_left == NULL)	/* no options given -- enable verbose mode */
     options.verbose = TRUE;
+#endif
 #endif
 
   while (*options_left)
@@ -636,7 +861,7 @@ void GetOptions(char *argv[], void (*print_usage_function)(void))
     if (strEqual(option, "--"))			/* stop scanning arguments */
       break;
 
-    if (strncmp(option, "--", 2) == 0)		/* treat '--' like '-' */
+    if (strPrefix(option, "--"))		/* treat '--' like '-' */
       option++;
 
     option_arg = strchr(option, '=');
@@ -738,6 +963,29 @@ void GetOptions(char *argv[], void (*print_usage_function)(void))
     {
       options.debug = TRUE;
     }
+    else if (strncmp(option, "-debug-x11-sync", option_len) == 0)
+    {
+      options.debug_x11_sync = TRUE;
+    }
+    else if (strPrefix(option, "-D"))
+    {
+#if 1
+      options.special_flags = getStringCopy(&option[2]);
+#else
+      char *flags_string = &option[2];
+      unsigned int flags_value;
+
+      if (*flags_string == '\0')
+	Error(ERR_EXIT_HELP, "empty flag ignored");
+
+      flags_value = get_special_flags_function(flags_string);
+
+      if (flags_value == 0)
+	Error(ERR_EXIT_HELP, "unknown flag '%s'", flags_string);
+
+      options.special_flags |= flags_value;
+#endif
+    }
     else if (strncmp(option, "-execute", option_len) == 0)
     {
       if (option_arg == NULL)
@@ -797,17 +1045,25 @@ void Error(int mode, char *format, ...)
 {
   static boolean last_line_was_separator = FALSE;
   char *process_name = "";
-  FILE *error = stderr;
-  char *newline = "\n";
 
+#if defined(PLATFORM_ANDROID)
+  android_log_prio = (mode & ERR_DEBUG ? ANDROID_LOG_DEBUG :
+		      mode & ERR_INFO ? ANDROID_LOG_INFO :
+		      mode & ERR_WARN ? ANDROID_LOG_WARN :
+		      mode & ERR_EXIT ? ANDROID_LOG_FATAL :
+		      ANDROID_LOG_UNKNOWN);
+#endif
+
+#if 1
   /* display warnings only when running in verbose mode */
   if (mode & ERR_WARN && !options.verbose)
     return;
+#endif
 
-  if (mode == ERR_RETURN_LINE)
+  if (mode == ERR_INFO_LINE)
   {
     if (!last_line_was_separator)
-      fprintf_line(error, format, 79);
+      fprintf_line(program.error_file, format, 79);
 
     last_line_was_separator = TRUE;
 
@@ -816,16 +1072,6 @@ void Error(int mode, char *format, ...)
 
   last_line_was_separator = FALSE;
 
-#if defined(PLATFORM_MSDOS)
-  newline = "\r\n";
-
-  if ((error = openErrorFile()) == NULL)
-  {
-    printf("Cannot write to error output file!%s", newline);
-    program.exit_function(1);
-  }
-#endif
-
   if (mode & ERR_SOUND_SERVER)
     process_name = " sound server";
   else if (mode & ERR_NETWORK_SERVER)
@@ -837,28 +1083,32 @@ void Error(int mode, char *format, ...)
   {
     va_list ap;
 
-    fprintf(error, "%s%s: ", program.command_basename, process_name);
+    fprintf(program.error_file, "%s%s: ", program.command_basename,
+	    process_name);
 
     if (mode & ERR_WARN)
-      fprintf(error, "warning: ");
+      fprintf(program.error_file, "warning: ");
 
     va_start(ap, format);
-    vfprintf(error, format, ap);
+    vfprintf_newline(program.error_file, format, ap);
     va_end(ap);
-  
-    fprintf(error, "%s", newline);
+
+    if ((mode & ERR_EXIT) && !(mode & ERR_FROM_SERVER))
+    {
+      va_start(ap, format);
+      program.exit_message_function(format, ap);
+      va_end(ap);
+    }
   }
   
   if (mode & ERR_HELP)
-    fprintf(error, "%s: Try option '--help' for more information.%s",
-	    program.command_basename, newline);
+    fprintf_newline(program.error_file,
+		    "%s: Try option '--help' for more information.",
+		    program.command_basename);
 
   if (mode & ERR_EXIT)
-    fprintf(error, "%s%s: aborting%s",
-	    program.command_basename, process_name, newline);
-
-  if (error != stderr)
-    fclose(error);
+    fprintf_newline(program.error_file, "%s%s: aborting",
+		    program.command_basename, process_name);
 
   if (mode & ERR_EXIT)
   {
@@ -874,7 +1124,7 @@ void Error(int mode, char *format, ...)
 /* checked memory allocation and freeing functions                           */
 /* ------------------------------------------------------------------------- */
 
-void *checked_malloc(unsigned long size)
+void *checked_malloc(unsigned int size)
 {
   void *ptr;
 
@@ -886,7 +1136,7 @@ void *checked_malloc(unsigned long size)
   return ptr;
 }
 
-void *checked_calloc(unsigned long size)
+void *checked_calloc(unsigned int size)
 {
   void *ptr;
 
@@ -898,7 +1148,7 @@ void *checked_calloc(unsigned long size)
   return ptr;
 }
 
-void *checked_realloc(void *ptr, unsigned long size)
+void *checked_realloc(void *ptr, unsigned int size)
 {
   ptr = realloc(ptr, size);
 
@@ -914,6 +1164,19 @@ void checked_free(void *ptr)
     free(ptr);
 }
 
+void clear_mem(void *ptr, unsigned int size)
+{
+#if defined(PLATFORM_WIN32)
+  /* for unknown reason, memset() sometimes crashes when compiled with MinGW */
+  char *cptr = (char *)ptr;
+
+  while (size--)
+    *cptr++ = 0;
+#else
+  memset(ptr, 0, size);
+#endif
+}
+
 
 /* ------------------------------------------------------------------------- */
 /* various helper functions                                                  */
@@ -1030,7 +1293,8 @@ boolean getFileChunk(FILE *file, char *chunk_name, int *chunk_size,
   const int chunk_name_length = 4;
 
   /* read chunk name */
-  fgets(chunk_name, chunk_name_length + 1, file);
+  if (fgets(chunk_name, chunk_name_length + 1, file) == NULL)
+    return FALSE;
 
   if (chunk_size != NULL)
   {
@@ -1093,7 +1357,7 @@ int putFileVersion(FILE *file, int version)
   return 4;
 }
 
-void ReadBytesFromFile(FILE *file, byte *buffer, unsigned long bytes)
+void ReadBytesFromFile(FILE *file, byte *buffer, unsigned int bytes)
 {
   int i;
 
@@ -1101,7 +1365,7 @@ void ReadBytesFromFile(FILE *file, byte *buffer, unsigned long bytes)
     buffer[i] = fgetc(file);
 }
 
-void WriteBytesToFile(FILE *file, byte *buffer, unsigned long bytes)
+void WriteBytesToFile(FILE *file, byte *buffer, unsigned int bytes)
 {
   int i;
 
@@ -1109,13 +1373,13 @@ void WriteBytesToFile(FILE *file, byte *buffer, unsigned long bytes)
     fputc(buffer[i], file);
 }
 
-void ReadUnusedBytesFromFile(FILE *file, unsigned long bytes)
+void ReadUnusedBytesFromFile(FILE *file, unsigned int bytes)
 {
   while (bytes-- && !feof(file))
     fgetc(file);
 }
 
-void WriteUnusedBytesToFile(FILE *file, unsigned long bytes)
+void WriteUnusedBytesToFile(FILE *file, unsigned int bytes)
 {
   while (bytes--)
     fputc(0, file);
@@ -1173,8 +1437,10 @@ void translate_keyname(Key *keysym, char **x11name, char **name, int mode)
     { KSYM_Meta_R,	"XK_Meta_R",		"right meta" },
     { KSYM_Alt_L,	"XK_Alt_L",		"left alt" },
     { KSYM_Alt_R,	"XK_Alt_R",		"right alt" },
+#if !defined(TARGET_SDL2)
     { KSYM_Super_L,	"XK_Super_L",		"left super" },	 /* Win-L */
     { KSYM_Super_R,	"XK_Super_R",		"right super" }, /* Win-R */
+#endif
     { KSYM_Mode_switch,	"XK_Mode_switch",	"mode switch" }, /* Alt-R */
     { KSYM_Multi_key,	"XK_Multi_key",		"multi key" },	 /* Ctrl-R */
 
@@ -1227,7 +1493,9 @@ void translate_keyname(Key *keysym, char **x11name, char **name, int mode)
     { KSYM_braceright,	"XK_braceright",	"brace right" },
     { KSYM_asciitilde,	"XK_asciitilde",	"~" },
 
+#if !defined(TARGET_SDL2)
     /* special (non-ASCII) keys */
+    { KSYM_degree,	"XK_degree",		"°" },
     { KSYM_Adiaeresis,	"XK_Adiaeresis",	"Ä" },
     { KSYM_Odiaeresis,	"XK_Odiaeresis",	"Ö" },
     { KSYM_Udiaeresis,	"XK_Udiaeresis",	"Ü" },
@@ -1235,6 +1503,7 @@ void translate_keyname(Key *keysym, char **x11name, char **name, int mode)
     { KSYM_odiaeresis,	"XK_odiaeresis",	"ö" },
     { KSYM_udiaeresis,	"XK_udiaeresis",	"ü" },
     { KSYM_ssharp,	"XK_ssharp",		"sharp s" },
+#endif
 
     /* end-of-array identifier */
     { 0,                NULL,			NULL }
@@ -1255,13 +1524,8 @@ void translate_keyname(Key *keysym, char **x11name, char **name, int mode)
       sprintf(name_buffer, "%c", '0' + (char)(key - KSYM_0));
     else if (key >= KSYM_KP_0 && key <= KSYM_KP_9)
       sprintf(name_buffer, "keypad %c", '0' + (char)(key - KSYM_KP_0));
-#if 1
     else if (key >= KSYM_FKEY_FIRST && key <= KSYM_FKEY_LAST)
       sprintf(name_buffer, "F%d", (int)(key - KSYM_FKEY_FIRST + 1));
-#else
-    else if (key >= KSYM_FKEY_FIRST && key <= KSYM_FKEY_LAST)
-      sprintf(name_buffer, "function F%d", (int)(key - KSYM_FKEY_FIRST + 1));
-#endif
     else if (key == KSYM_UNDEFINED)
       strcpy(name_buffer, "(undefined)");
     else
@@ -1316,7 +1580,7 @@ void translate_keyname(Key *keysym, char **x11name, char **name, int mode)
       while (translate_key[++i].x11name);
 
       if (!translate_key[i].x11name)
-	sprintf(name_buffer, "0x%04lx", (unsigned long)key);
+	sprintf(name_buffer, "0x%04x", (unsigned int)key);
     }
 
     *x11name = name_buffer;
@@ -1346,7 +1610,7 @@ void translate_keyname(Key *keysym, char **x11name, char **name, int mode)
     Key key = KSYM_UNDEFINED;
     char *name_ptr = *x11name;
 
-    if (strncmp(name_ptr, "XK_", 3) == 0 && strlen(name_ptr) == 4)
+    if (strPrefix(name_ptr, "XK_") && strlen(name_ptr) == 4)
     {
       char c = name_ptr[3];
 
@@ -1357,14 +1621,14 @@ void translate_keyname(Key *keysym, char **x11name, char **name, int mode)
       else if (c >= '0' && c <= '9')
 	key = KSYM_0 + (Key)(c - '0');
     }
-    else if (strncmp(name_ptr, "XK_KP_", 6) == 0 && strlen(name_ptr) == 7)
+    else if (strPrefix(name_ptr, "XK_KP_") && strlen(name_ptr) == 7)
     {
       char c = name_ptr[6];
 
       if (c >= '0' && c <= '9')
 	key = KSYM_KP_0 + (Key)(c - '0');
     }
-    else if (strncmp(name_ptr, "XK_F", 4) == 0 && strlen(name_ptr) <= 6)
+    else if (strPrefix(name_ptr, "XK_F") && strlen(name_ptr) <= 6)
     {
       char c1 = name_ptr[4];
       char c2 = name_ptr[5];
@@ -1377,7 +1641,7 @@ void translate_keyname(Key *keysym, char **x11name, char **name, int mode)
       if (d >= 1 && d <= KSYM_NUM_FKEYS)
 	key = KSYM_F1 + (Key)(d - 1);
     }
-    else if (strncmp(name_ptr, "XK_", 3) == 0)
+    else if (strPrefix(name_ptr, "XK_"))
     {
       i = 0;
 
@@ -1391,9 +1655,9 @@ void translate_keyname(Key *keysym, char **x11name, char **name, int mode)
       }
       while (translate_key[++i].x11name);
     }
-    else if (strncmp(name_ptr, "0x", 2) == 0)
+    else if (strPrefix(name_ptr, "0x"))
     {
-      unsigned long value = 0;
+      unsigned int value = 0;
 
       name_ptr += 2;
 
@@ -1461,16 +1725,23 @@ Key getKeyFromX11KeyName(char *x11name)
 char getCharFromKey(Key key)
 {
   char *keyname = getKeyNameFromKey(key);
-  char letter = 0;
+  char c = 0;
 
   if (strlen(keyname) == 1)
-    letter = keyname[0];
+    c = keyname[0];
   else if (strEqual(keyname, "space"))
-    letter = ' ';
-  else if (strEqual(keyname, "circumflex"))
-    letter = '^';
+    c = ' ';
+
+  return c;
+}
+
+char getValidConfigValueChar(char c)
+{
+  if (c == '#' ||	/* used to mark comments */
+      c == '\\')	/* used to mark continued lines */
+    c = 0;
 
-  return letter;
+  return c;
 }
 
 
@@ -1510,9 +1781,13 @@ int get_integer_from_string(char *s)
 
   if (result == -1)
   {
-    if (strEqual(s_lower, "false"))
+    if (strEqual(s_lower, "false") ||
+	strEqual(s_lower, "no") ||
+	strEqual(s_lower, "off"))
       result = 0;
-    else if (strEqual(s_lower, "true"))
+    else if (strEqual(s_lower, "true") ||
+	     strEqual(s_lower, "yes") ||
+	     strEqual(s_lower, "on"))
       result = 1;
     else
       result = atoi(s);
@@ -1539,6 +1814,24 @@ boolean get_boolean_from_string(char *s)
   return result;
 }
 
+int get_switch3_from_string(char *s)
+{
+  char *s_lower = getStringToLower(s);
+  int result = FALSE;
+
+  if (strEqual(s_lower, "true") ||
+      strEqual(s_lower, "yes") ||
+      strEqual(s_lower, "on") ||
+      get_integer_from_string(s) == 1)
+    result = TRUE;
+  else if (strEqual(s_lower, "auto"))
+    result = AUTO;
+
+  free(s_lower);
+
+  return result;
+}
+
 
 /* ------------------------------------------------------------------------- */
 /* functions for generic lists                                               */
@@ -1567,7 +1860,7 @@ void deleteNodeFromList(ListNode **node_first, char *key,
 
   if (strEqual((*node_first)->key, key))
   {
-    free((*node_first)->key);
+    checked_free((*node_first)->key);
     if (destructor_function)
       destructor_function((*node_first)->content);
     *node_first = (*node_first)->next;
@@ -1608,33 +1901,284 @@ void dumpList(ListNode *node_first)
 
 
 /* ------------------------------------------------------------------------- */
-/* functions for checking files and filenames                                */
+/* functions for file handling                                               */
 /* ------------------------------------------------------------------------- */
 
-boolean fileExists(char *filename)
+File *openFile(char *filename, char *mode)
 {
-  if (filename == NULL)
-    return FALSE;
+  File *file = checked_calloc(sizeof(File));
 
-  return (access(filename, F_OK) == 0);
-}
+  file->file = fopen(filename, mode);
 
-boolean fileHasPrefix(char *basename, char *prefix)
-{
-  static char *basename_lower = NULL;
-  int basename_length, prefix_length;
+  if (file->file != NULL)
+  {
+    file->filename = getStringCopy(filename);
 
-  checked_free(basename_lower);
+    return file;
+  }
 
-  if (basename == NULL || prefix == NULL)
-    return FALSE;
+#if defined(PLATFORM_ANDROID)
+  file->asset_file = SDL_RWFromFile(filename, mode);
 
-  basename_lower = getStringToLower(basename);
-  basename_length = strlen(basename_lower);
-  prefix_length = strlen(prefix);
+  if (file->asset_file != NULL)
+  {
+    file->file_is_asset = TRUE;
+    file->filename = getStringCopy(filename);
 
-  if (basename_length > prefix_length + 1 &&
-      basename_lower[prefix_length] == '.' &&
+    return file;
+  }
+#endif
+
+  checked_free(file);
+
+  return NULL;
+}
+
+int closeFile(File *file)
+{
+  if (file == NULL)
+    return -1;
+
+  int result;
+
+#if defined(PLATFORM_ANDROID)
+  if (file->asset_file)
+    result = SDL_RWclose(file->asset_file);
+#endif
+
+  if (file->file)
+    result = fclose(file->file);
+
+  checked_free(file->filename);
+  checked_free(file);
+
+  return result;
+}
+
+int checkEndOfFile(File *file)
+{
+#if defined(PLATFORM_ANDROID)
+  if (file->file_is_asset)
+    return file->end_of_file;
+#endif
+
+  return feof(file->file);
+}
+
+char *getStringFromFile(File *file, char *line, int size)
+{
+#if defined(PLATFORM_ANDROID)
+  if (file->file_is_asset)
+  {
+    if (file->end_of_file)
+      return NULL;
+
+    char *line_ptr = line;
+    int num_bytes_read = 0;
+
+    while (num_bytes_read < size - 1 &&
+	   SDL_RWread(file->asset_file, line_ptr, 1, 1) == 1 &&
+	   *line_ptr++ != '\n')
+      num_bytes_read++;
+
+    *line_ptr = '\0';
+
+    if (strlen(line) == 0)
+    {
+      file->end_of_file = TRUE;
+
+      return NULL;
+    }
+
+    return line;
+  }
+#endif
+
+  return fgets(line, size, file->file);
+}
+
+
+/* ------------------------------------------------------------------------- */
+/* functions for directory handling                                          */
+/* ------------------------------------------------------------------------- */
+
+Directory *openDirectory(char *dir_name)
+{
+  Directory *dir = checked_calloc(sizeof(Directory));
+
+  dir->dir = opendir(dir_name);
+
+  if (dir->dir != NULL)
+  {
+    dir->filename = getStringCopy(dir_name);
+
+    return dir;
+  }
+
+#if defined(PLATFORM_ANDROID)
+  char *asset_toc_filename = getPath2(dir_name, ASSET_TOC_BASENAME);
+
+  dir->asset_toc_file = SDL_RWFromFile(asset_toc_filename, MODE_READ);
+
+  checked_free(asset_toc_filename);
+
+  if (dir->asset_toc_file != NULL)
+  {
+    dir->directory_is_asset = TRUE;
+    dir->filename = getStringCopy(dir_name);
+
+    return dir;
+  }
+#endif
+
+  checked_free(dir);
+
+  return NULL;
+}
+
+int closeDirectory(Directory *dir)
+{
+  if (dir == NULL)
+    return -1;
+
+  int result;
+
+#if defined(PLATFORM_ANDROID)
+  if (dir->asset_toc_file)
+    result = SDL_RWclose(dir->asset_toc_file);
+#endif
+
+  if (dir->dir)
+    result = closedir(dir->dir);
+
+  if (dir->dir_entry)
+    freeDirectoryEntry(dir->dir_entry);
+
+  checked_free(dir->filename);
+  checked_free(dir);
+
+  return result;
+}
+
+DirectoryEntry *readDirectory(Directory *dir)
+{
+  if (dir->dir_entry)
+    freeDirectoryEntry(dir->dir_entry);
+
+  dir->dir_entry = NULL;
+
+#if defined(PLATFORM_ANDROID)
+  if (dir->directory_is_asset)
+  {
+    char line[MAX_LINE_LEN];
+    char *line_ptr = line;
+    int num_bytes_read = 0;
+
+    while (num_bytes_read < MAX_LINE_LEN - 1 &&
+	   SDL_RWread(dir->asset_toc_file, line_ptr, 1, 1) == 1 &&
+	   *line_ptr != '\n')
+    {
+      line_ptr++;
+      num_bytes_read++;
+    }
+
+    *line_ptr = '\0';
+
+    if (strlen(line) == 0)
+      return NULL;
+
+    dir->dir_entry = checked_calloc(sizeof(DirectoryEntry));
+
+    dir->dir_entry->is_directory = FALSE;
+    if (line[strlen(line) - 1] = '/')
+    {
+      dir->dir_entry->is_directory = TRUE;
+
+      line[strlen(line) - 1] = '\0';
+    }
+
+    dir->dir_entry->basename = getStringCopy(line);
+    dir->dir_entry->filename = getPath2(dir->filename, line);
+
+    return dir->dir_entry;
+  }
+#endif
+
+  struct dirent *dir_entry = readdir(dir->dir);
+
+  if (dir_entry == NULL)
+    return NULL;
+
+  dir->dir_entry = checked_calloc(sizeof(DirectoryEntry));
+
+  dir->dir_entry->basename = getStringCopy(dir_entry->d_name);
+  dir->dir_entry->filename = getPath2(dir->filename, dir_entry->d_name);
+
+  struct stat file_status;
+
+  dir->dir_entry->is_directory =
+    (stat(dir->dir_entry->filename, &file_status) == 0 &&
+     (file_status.st_mode & S_IFMT) == S_IFDIR);
+
+#if 0
+  Error(ERR_INFO, "::: '%s' is directory: %d",
+	dir->dir_entry->basename,
+	dir->dir_entry->is_directory);
+#endif
+
+  return dir->dir_entry;
+}
+
+void freeDirectoryEntry(DirectoryEntry *dir_entry)
+{
+  if (dir_entry == NULL)
+    return;
+
+  checked_free(dir_entry->basename);
+  checked_free(dir_entry->filename);
+  checked_free(dir_entry);
+}
+
+
+/* ------------------------------------------------------------------------- */
+/* functions for checking files and filenames                                */
+/* ------------------------------------------------------------------------- */
+
+boolean fileExists(char *filename)
+{
+  if (filename == NULL)
+    return FALSE;
+
+#if defined(PLATFORM_ANDROID)
+  // workaround: check if file exists by opening and closing it
+  SDL_RWops *file = SDL_RWFromFile(filename, MODE_READ);
+  boolean success = (file != NULL);
+
+  if (success)
+    SDL_RWclose(file);
+
+  return success;
+#else
+  return (access(filename, F_OK) == 0);
+#endif
+}
+
+boolean fileHasPrefix(char *basename, char *prefix)
+{
+  static char *basename_lower = NULL;
+  int basename_length, prefix_length;
+
+  checked_free(basename_lower);
+
+  if (basename == NULL || prefix == NULL)
+    return FALSE;
+
+  basename_lower = getStringToLower(basename);
+  basename_length = strlen(basename_lower);
+  prefix_length = strlen(prefix);
+
+  if (basename_length > prefix_length + 1 &&
+      basename_lower[prefix_length] == '.' &&
       strncmp(basename_lower, prefix, prefix_length) == 0)
     return TRUE;
 
@@ -1665,27 +2209,38 @@ boolean fileHasSuffix(char *basename, char *suffix)
 
 boolean FileIsGraphic(char *filename)
 {
+#if 1
+  return TRUE;
+#else
   char *basename = getBaseNamePtr(filename);
 
   return fileHasSuffix(basename, "pcx");
+#endif
 }
 
 boolean FileIsSound(char *filename)
 {
+#if 1
+  return TRUE;
+#else
   char *basename = getBaseNamePtr(filename);
 
   return fileHasSuffix(basename, "wav");
+#endif
 }
 
 boolean FileIsMusic(char *filename)
 {
+#if 1
+  return TRUE;
+#else
   char *basename = getBaseNamePtr(filename);
 
   if (FileIsSound(basename))
     return TRUE;
 
 #if defined(TARGET_SDL)
-  if (fileHasPrefix(basename, "mod") ||
+  if ((fileHasPrefix(basename, "mod") && !fileHasSuffix(basename, "txt")) ||
       fileHasSuffix(basename, "mod") ||
       fileHasSuffix(basename, "s3m") ||
       fileHasSuffix(basename, "it") ||
@@ -1698,6 +2253,7 @@ boolean FileIsMusic(char *filename)
 #endif
 
   return FALSE;
+#endif
 }
 
 boolean FileIsArtworkType(char *basename, int type)
@@ -1784,6 +2340,20 @@ int get_parameter_value(char *value_raw, char *suffix, int type)
 	      strEqual(value, "up")    ? MV_UP :
 	      strEqual(value, "down")  ? MV_DOWN : MV_NONE);
   }
+  else if (strEqual(suffix, ".align"))
+  {
+    result = (strEqual(value, "left")   ? ALIGN_LEFT :
+	      strEqual(value, "right")  ? ALIGN_RIGHT :
+	      strEqual(value, "center") ? ALIGN_CENTER :
+	      strEqual(value, "middle") ? ALIGN_CENTER : ALIGN_DEFAULT);
+  }
+  else if (strEqual(suffix, ".valign"))
+  {
+    result = (strEqual(value, "top")    ? VALIGN_TOP :
+	      strEqual(value, "bottom") ? VALIGN_BOTTOM :
+	      strEqual(value, "middle") ? VALIGN_MIDDLE :
+	      strEqual(value, "center") ? VALIGN_MIDDLE : VALIGN_DEFAULT);
+  }
   else if (strEqual(suffix, ".anim_mode"))
   {
     result = (string_has_parameter(value, "none")	? ANIM_NONE :
@@ -1797,6 +2367,7 @@ int get_parameter_value(char *value_raw, char *suffix, int type)
 	      string_has_parameter(value, "ce_delay")	? ANIM_CE_DELAY :
 	      string_has_parameter(value, "horizontal")	? ANIM_HORIZONTAL :
 	      string_has_parameter(value, "vertical")	? ANIM_VERTICAL :
+	      string_has_parameter(value, "centered")	? ANIM_CENTERED :
 	      ANIM_DEFAULT);
 
     if (string_has_parameter(value, "reverse"))
@@ -1808,6 +2379,36 @@ int get_parameter_value(char *value_raw, char *suffix, int type)
     if (string_has_parameter(value, "static_panel"))
       result |= ANIM_STATIC_PANEL;
   }
+  else if (strEqual(suffix, ".class"))
+  {
+    result = get_hash_from_key(value);
+  }
+  else if (strEqual(suffix, ".style"))
+  {
+    result = STYLE_DEFAULT;
+
+    if (string_has_parameter(value, "accurate_borders"))
+      result |= STYLE_ACCURATE_BORDERS;
+
+    if (string_has_parameter(value, "inner_corners"))
+      result |= STYLE_INNER_CORNERS;
+  }
+  else if (strEqual(suffix, ".fade_mode"))
+  {
+    result = (string_has_parameter(value, "none")	? FADE_MODE_NONE :
+	      string_has_parameter(value, "fade")	? FADE_MODE_FADE :
+	      string_has_parameter(value, "crossfade")	? FADE_MODE_CROSSFADE :
+	      string_has_parameter(value, "melt")	? FADE_MODE_MELT :
+	      FADE_MODE_DEFAULT);
+  }
+#if 1
+  else if (strPrefix(suffix, ".font"))		/* (may also be ".font_xyz") */
+#else
+  else if (strEqualN(suffix, ".font", 5))	/* (may also be ".font_xyz") */
+#endif
+  {
+    result = gfx.get_font_from_token_function(value);
+  }
   else		/* generic parameter of type integer or boolean */
   {
     result = (strEqual(value, ARG_UNDEFINED) ? ARG_UNDEFINED_VALUE :
@@ -1821,18 +2422,46 @@ int get_parameter_value(char *value_raw, char *suffix, int type)
   return result;
 }
 
-int get_auto_parameter_value(char *token, char *value_raw)
+struct ScreenModeInfo *get_screen_mode_from_string(char *screen_mode_string)
+{
+  static struct ScreenModeInfo screen_mode;
+  char *screen_mode_string_x = strchr(screen_mode_string, 'x');
+  char *screen_mode_string_copy;
+  char *screen_mode_string_pos_w;
+  char *screen_mode_string_pos_h;
+
+  if (screen_mode_string_x == NULL)	/* invalid screen mode format */
+    return NULL;
+
+  screen_mode_string_copy = getStringCopy(screen_mode_string);
+
+  screen_mode_string_pos_w = screen_mode_string_copy;
+  screen_mode_string_pos_h = strchr(screen_mode_string_copy, 'x');
+  *screen_mode_string_pos_h++ = '\0';
+
+  screen_mode.width  = atoi(screen_mode_string_pos_w);
+  screen_mode.height = atoi(screen_mode_string_pos_h);
+
+  return &screen_mode;
+}
+
+void get_aspect_ratio_from_screen_mode(struct ScreenModeInfo *screen_mode,
+				       int *x, int *y)
 {
-  char *suffix;
+  float aspect_ratio = (float)screen_mode->width / (float)screen_mode->height;
+  float aspect_ratio_new;
+  int i = 1;
 
-  if (token == NULL || value_raw == NULL)
-    return ARG_UNDEFINED_VALUE;
+  do
+  {
+    *x = i * aspect_ratio + 0.000001;
+    *y = i;
 
-  suffix = strrchr(token, '.');
-  if (suffix == NULL)
-    suffix = token;
+    aspect_ratio_new = (float)*x / (float)*y;
 
-  return get_parameter_value(value_raw, suffix, TYPE_INTEGER);
+    i++;
+  }
+  while (aspect_ratio_new != aspect_ratio && *y < screen_mode->height);
 }
 
 static void FreeCustomArtworkList(struct ArtworkListInfo *,
@@ -1877,14 +2506,18 @@ struct FileInfo *getFileListFromConfigList(struct ConfigInfo *config_list,
 
       file_list[i].redefined = FALSE;
       file_list[i].fallback_to_default = FALSE;
+      file_list[i].default_is_cloned = FALSE;
     }
   }
 
   list_pos = 0;
+
   for (i = 0; config_list[i].token != NULL; i++)
   {
     int len_config_token = strlen(config_list[i].token);
+#if 0
     int len_config_value = strlen(config_list[i].value);
+#endif
     boolean is_file_entry = TRUE;
 
     for (j = 0; suffix_list[j].token != NULL; j++)
@@ -1899,6 +2532,7 @@ struct FileInfo *getFileListFromConfigList(struct ConfigInfo *config_list,
 		  config_list[i].value);
 
 	is_file_entry = FALSE;
+
 	break;
       }
     }
@@ -1916,33 +2550,46 @@ struct FileInfo *getFileListFromConfigList(struct ConfigInfo *config_list,
       if (list_pos >= num_file_list_entries)
 	break;
 
+#if 0
       /* simple sanity check if this is really a file definition */
       if (!strEqual(&config_list[i].value[len_config_value - 4], ".pcx") &&
 	  !strEqual(&config_list[i].value[len_config_value - 4], ".wav") &&
 	  !strEqual(config_list[i].value, UNDEFINED_FILENAME))
       {
-	Error(ERR_RETURN, "Configuration directive '%s' -> '%s':",
+	Error(ERR_INFO, "Configuration directive '%s' -> '%s':",
 	      config_list[i].token, config_list[i].value);
 	Error(ERR_EXIT, "This seems to be no valid definition -- please fix");
       }
+#endif
 
       file_list[list_pos].token = config_list[i].token;
       file_list[list_pos].default_filename = config_list[i].value;
+
+#if 0
+      printf("::: '%s' => '%s'\n", config_list[i].token, config_list[i].value);
+#endif
     }
+
+    if (strSuffix(config_list[i].token, ".clone_from"))
+      file_list[list_pos].default_is_cloned = TRUE;
   }
 
   num_file_list_entries_found = list_pos + 1;
   if (num_file_list_entries_found != num_file_list_entries)
   {
-    Error(ERR_RETURN_LINE, "-");
-    Error(ERR_RETURN, "inconsistant config list information:");
-    Error(ERR_RETURN, "- should be:   %d (according to 'src/conf_gfx.h')",
+    Error(ERR_INFO_LINE, "-");
+    Error(ERR_INFO, "inconsistant config list information:");
+    Error(ERR_INFO, "- should be:   %d (according to 'src/conf_xxx.h')",
 	  num_file_list_entries);
-    Error(ERR_RETURN, "- found to be: %d (according to 'src/conf_gfx.c')",
+    Error(ERR_INFO, "- found to be: %d (according to 'src/conf_xxx.c')",
 	  num_file_list_entries_found);
     Error(ERR_EXIT,   "please fix");
   }
 
+#if 0
+  printf("::: ---------- DONE ----------\n");
+#endif
+
   return file_list;
 }
 
@@ -2033,6 +2680,7 @@ static void add_dynamic_file_list_entry(struct FileInfo **list,
 
   new_list_entry->redefined = FALSE;
   new_list_entry->fallback_to_default = FALSE;
+  new_list_entry->default_is_cloned = FALSE;
 
   read_token_parameters(extra_file_hash, suffix_list, new_list_entry);
 }
@@ -2208,10 +2856,20 @@ static void LoadArtworkConfigFromFilename(struct ArtworkListInfo *artwork_info,
 
       base_index = i;
 
+#if 0
+      if (IS_PARENT_PROCESS())
+	printf("===> MATCH: '%s', '%s'\n", token, base_prefix);
+#endif
+
       if (start_pos + len_base_prefix == len_token)	/* exact match */
       {
 	exact_match = TRUE;
 
+#if 0
+	if (IS_PARENT_PROCESS())
+	  printf("===> EXACT MATCH: '%s', '%s'\n", token, base_prefix);
+#endif
+
 	add_dynamic_file_list_entry(dynamic_file_list,
 				    num_dynamic_file_list_entries,
 				    extra_file_hash,
@@ -2245,10 +2903,20 @@ static void LoadArtworkConfigFromFilename(struct ArtworkListInfo *artwork_info,
 
 	ext1_index = j;
 
+#if 0
+	if (IS_PARENT_PROCESS())
+	  printf("===> MATCH: '%s', '%s'\n", token, ext1_suffix);
+#endif
+
 	if (start_pos + len_ext1_suffix == len_token)	/* exact match */
 	{
 	  exact_match = TRUE;
 
+#if 0
+	if (IS_PARENT_PROCESS())
+	  printf("===> EXACT MATCH: '%s', '%s'\n", token, ext1_suffix);
+#endif
+
 	  add_dynamic_file_list_entry(dynamic_file_list,
 				      num_dynamic_file_list_entries,
 				      extra_file_hash,
@@ -2287,10 +2955,20 @@ static void LoadArtworkConfigFromFilename(struct ArtworkListInfo *artwork_info,
 
 	ext2_index = k;
 
+#if 0
+	if (IS_PARENT_PROCESS())
+	  printf("===> MATCH: '%s', '%s'\n", token, ext2_suffix);
+#endif
+
 	if (start_pos + len_ext2_suffix == len_token)	/* exact match */
 	{
 	  exact_match = TRUE;
 
+#if 0
+	  if (IS_PARENT_PROCESS())
+	    printf("===> EXACT MATCH: '%s', '%s'\n", token, ext2_suffix);
+#endif
+
 	  add_dynamic_file_list_entry(dynamic_file_list,
 				      num_dynamic_file_list_entries,
 				      extra_file_hash,
@@ -2329,10 +3007,20 @@ static void LoadArtworkConfigFromFilename(struct ArtworkListInfo *artwork_info,
 
 	ext3_index = l;
 
+#if 0
+	if (IS_PARENT_PROCESS())
+	  printf("===> MATCH: '%s', '%s'\n", token, ext3_suffix);
+#endif
+
 	if (start_pos + len_ext3_suffix == len_token) /* exact match */
 	{
 	  exact_match = TRUE;
 
+#if 0
+	  if (IS_PARENT_PROCESS())
+	    printf("===> EXACT MATCH: '%s', '%s'\n", token, ext3_suffix);
+#endif
+
 	  add_dynamic_file_list_entry(dynamic_file_list,
 				      num_dynamic_file_list_entries,
 				      extra_file_hash,
@@ -2378,53 +3066,53 @@ static void LoadArtworkConfigFromFilename(struct ArtworkListInfo *artwork_info,
 
     if (options.debug && dynamic_tokens_found)
     {
-      Error(ERR_RETURN_LINE, "-");
-      Error(ERR_RETURN, "dynamic token(s) found in config file:");
-      Error(ERR_RETURN, "- config file: '%s'", filename);
+      Error(ERR_INFO_LINE, "-");
+      Error(ERR_INFO, "dynamic token(s) found in config file:");
+      Error(ERR_INFO, "- config file: '%s'", filename);
 
       for (list = setup_file_list; list != NULL; list = list->next)
       {
 	char *value = getHashEntry(extra_file_hash, list->token);
 
 	if (value != NULL && strEqual(value, known_token_value))
-	  Error(ERR_RETURN, "- dynamic token: '%s'", list->token);
+	  Error(ERR_INFO, "- dynamic token: '%s'", list->token);
       }
 
-      Error(ERR_RETURN_LINE, "-");
+      Error(ERR_INFO_LINE, "-");
     }
 
     if (unknown_tokens_found)
     {
-      Error(ERR_RETURN_LINE, "-");
-      Error(ERR_RETURN, "warning: unknown token(s) found in config file:");
-      Error(ERR_RETURN, "- config file: '%s'", filename);
+      Error(ERR_INFO_LINE, "-");
+      Error(ERR_INFO, "warning: unknown token(s) found in config file:");
+      Error(ERR_INFO, "- config file: '%s'", filename);
 
       for (list = setup_file_list; list != NULL; list = list->next)
       {
 	char *value = getHashEntry(extra_file_hash, list->token);
 
 	if (value != NULL && !strEqual(value, known_token_value))
-	  Error(ERR_RETURN, "- dynamic token: '%s'", list->token);
+	  Error(ERR_INFO, "- dynamic token: '%s'", list->token);
       }
 
-      Error(ERR_RETURN_LINE, "-");
+      Error(ERR_INFO_LINE, "-");
     }
 
     if (undefined_values_found)
     {
-      Error(ERR_RETURN_LINE, "-");
-      Error(ERR_RETURN, "warning: undefined values found in config file:");
-      Error(ERR_RETURN, "- config file: '%s'", filename);
+      Error(ERR_INFO_LINE, "-");
+      Error(ERR_INFO, "warning: undefined values found in config file:");
+      Error(ERR_INFO, "- config file: '%s'", filename);
 
       for (list = setup_file_list; list != NULL; list = list->next)
       {
 	char *value = getHashEntry(empty_file_hash, list->token);
 
 	if (value != NULL)
-	  Error(ERR_RETURN, "- undefined value for token: '%s'", list->token);
+	  Error(ERR_INFO, "- undefined value for token: '%s'", list->token);
       }
 
-      Error(ERR_RETURN_LINE, "-");
+      Error(ERR_INFO_LINE, "-");
     }
 
     freeSetupFileList(setup_file_list);
@@ -2453,7 +3141,7 @@ void LoadArtworkConfig(struct ArtworkListInfo *artwork_info)
   char *filename_base = UNDEFINED_FILENAME, *filename_local;
   int i, j;
 
-  DrawInitText("Loading artwork config:", 120, FC_GREEN);
+  DrawInitText("Loading artwork config", 120, FC_GREEN);
   DrawInitText(ARTWORKINFO_FILENAME(artwork_info->type), 150, FC_YELLOW);
 
   /* always start with reliable default values */
@@ -2494,11 +3182,21 @@ void LoadArtworkConfig(struct ArtworkListInfo *artwork_info)
     artwork_info->num_property_mapping_entries = 0;
   }
 
+#if 1
+  if (!GFX_OVERRIDE_ARTWORK(artwork_info->type))
+#else
   if (!SETUP_OVERRIDE_ARTWORK(setup, artwork_info->type))
+#endif
   {
     /* first look for special artwork configured in level series config */
     filename_base = getCustomArtworkLevelConfigFilename(artwork_info->type);
 
+#if 0
+    printf("::: filename_base == '%s' [%s, %s]\n", filename_base,
+	   leveldir_current->graphics_set,
+	   leveldir_current->graphics_path);
+#endif
+
     if (fileExists(filename_base))
       LoadArtworkConfigFromFilename(artwork_info, filename_base);
   }
@@ -2530,9 +3228,9 @@ static void replaceArtworkListEntry(struct ArtworkListInfo *artwork_info,
 {
   char *init_text[] =
   {
-    "Loading graphics:",
-    "Loading sounds:",
-    "Loading music:"
+    "Loading graphics",
+    "Loading sounds",
+    "Loading music"
   };
 
   ListNode *node;
@@ -2545,6 +3243,22 @@ static void replaceArtworkListEntry(struct ArtworkListInfo *artwork_info,
 
     basename = file_list_entry->default_filename;
 
+    /* fail for cloned default artwork that has no default filename defined */
+    if (file_list_entry->default_is_cloned &&
+	strEqual(basename, UNDEFINED_FILENAME))
+    {
+      int error_mode = ERR_WARN;
+
+      /* we can get away without sounds and music, but not without graphics */
+      if (*listnode == NULL && artwork_info->type == ARTWORK_TYPE_GRAPHICS)
+	error_mode = ERR_EXIT;
+
+      Error(error_mode, "token '%s' was cloned and has no default filename",
+	    file_list_entry->token);
+
+      return;
+    }
+
     /* dynamic artwork has no default filename / skip empty default artwork */
     if (basename == NULL || strEqual(basename, UNDEFINED_FILENAME))
       return;
@@ -2621,6 +3335,7 @@ static void replaceArtworkListEntry(struct ArtworkListInfo *artwork_info,
       error_mode = ERR_EXIT;
 
     Error(error_mode, "cannot load artwork file '%s'", basename);
+
     return;
   }
 }
@@ -2630,12 +3345,13 @@ static void LoadCustomArtwork(struct ArtworkListInfo *artwork_info,
 			      struct FileInfo *file_list_entry)
 {
 #if 0
-  printf("GOT CUSTOM ARTWORK FILE '%s'\n", filename);
+  printf("GOT CUSTOM ARTWORK FILE '%s'\n", file_list_entry->filename);
 #endif
 
   if (strEqual(file_list_entry->filename, UNDEFINED_FILENAME))
   {
     deleteArtworkListEntry(artwork_info, listnode);
+
     return;
   }
 
@@ -2651,6 +3367,8 @@ void ReloadCustomArtworkList(struct ArtworkListInfo *artwork_info)
     artwork_info->num_dynamic_file_list_entries;
   int i;
 
+  print_timestamp_init("ReloadCustomArtworkList");
+
   for (i = 0; i < num_file_list_entries; i++)
     LoadCustomArtwork(artwork_info, &artwork_info->artwork_list[i],
 		      &file_list[i]);
@@ -2659,6 +3377,8 @@ void ReloadCustomArtworkList(struct ArtworkListInfo *artwork_info)
     LoadCustomArtwork(artwork_info, &artwork_info->dynamic_artwork_list[i],
 		      &dynamic_file_list[i]);
 
+  print_timestamp_done("ReloadCustomArtworkList");
+
 #if 0
   dumpList(artwork_info->content_list);
 #endif
@@ -2697,25 +3417,36 @@ void FreeCustomArtworkLists(struct ArtworkListInfo *artwork_info)
 /* ------------------------------------------------------------------------- */
 /* functions only needed for non-Unix (non-command-line) systems             */
 /* (MS-DOS only; SDL/Windows creates files "stdout.txt" and "stderr.txt")    */
+/* (now also added for Windows, to create files in user data directory)      */
 /* ------------------------------------------------------------------------- */
 
-#if defined(PLATFORM_MSDOS)
-
-#define ERROR_FILENAME		"stderr.txt"
+char *getErrorFilename(char *basename)
+{
+  return getPath2(getUserGameDataDir(), basename);
+}
 
-void initErrorFile()
+void openErrorFile()
 {
-  unlink(ERROR_FILENAME);
+  InitUserDataDirectory();
+
+  if ((program.error_file = fopen(program.error_filename, MODE_WRITE)) == NULL)
+  {
+    program.error_file = stderr;
+
+    Error(ERR_WARN, "cannot open file '%s' for writing: %s",
+	  program.error_filename, strerror(errno));
+  }
 }
 
-FILE *openErrorFile()
+void closeErrorFile()
 {
-  return fopen(ERROR_FILENAME, MODE_APPEND);
+  if (program.error_file != stderr)	/* do not close stream 'stderr' */
+    fclose(program.error_file);
 }
 
 void dumpErrorFile()
 {
-  FILE *error_file = fopen(ERROR_FILENAME, MODE_READ);
+  FILE *error_file = fopen(program.error_filename, MODE_READ);
 
   if (error_file != NULL)
   {
@@ -2725,29 +3456,104 @@ void dumpErrorFile()
     fclose(error_file);
   }
 }
+
+void NotifyUserAboutErrorFile()
+{
+#if defined(PLATFORM_WIN32)
+  char *title_text = getStringCat2(program.program_title, " Error Message");
+  char *error_text = getStringCat2("The program was aborted due to an error; "
+				   "for details, see the following error file:"
+				   STRING_NEWLINE, program.error_filename);
+
+  MessageBox(NULL, error_text, title_text, MB_OK);
 #endif
+}
 
 
 /* ------------------------------------------------------------------------- */
 /* the following is only for debugging purpose and normally not used         */
 /* ------------------------------------------------------------------------- */
 
-#define DEBUG_NUM_TIMESTAMPS	3
+#if DEBUG
+
+#define DEBUG_PRINT_INIT_TIMESTAMPS		TRUE
+#define DEBUG_PRINT_INIT_TIMESTAMPS_DEPTH	10
+
+#define DEBUG_NUM_TIMESTAMPS			10
+#define DEBUG_TIME_IN_MICROSECONDS		0
+
+#if DEBUG_TIME_IN_MICROSECONDS
+static double Counter_Microseconds()
+{
+  static struct timeval base_time = { 0, 0 };
+  struct timeval current_time;
+  double counter;
+
+  gettimeofday(&current_time, NULL);
+
+  /* reset base time in case of wrap-around */
+  if (current_time.tv_sec < base_time.tv_sec)
+    base_time = current_time;
+
+  counter =
+    ((double)(current_time.tv_sec  - base_time.tv_sec)) * 1000000 +
+    ((double)(current_time.tv_usec - base_time.tv_usec));
+
+  return counter;		/* return microseconds since last init */
+}
+#endif
+
+char *debug_print_timestamp_get_padding(int padding_size)
+{
+  static char *padding = NULL;
+  int max_padding_size = 100;
+
+  if (padding == NULL)
+  {
+    padding = checked_calloc(max_padding_size + 1);
+    memset(padding, ' ', max_padding_size);
+  }
+
+  return &padding[MAX(0, max_padding_size - padding_size)];
+}
 
 void debug_print_timestamp(int counter_nr, char *message)
 {
-  static long counter[DEBUG_NUM_TIMESTAMPS][2];
+  int indent_size = 8;
+  int padding_size = 40;
+  float timestamp_interval;
 
-  if (counter_nr >= DEBUG_NUM_TIMESTAMPS)
+  if (counter_nr < 0)
+    Error(ERR_EXIT, "debugging: invalid negative counter");
+  else if (counter_nr >= DEBUG_NUM_TIMESTAMPS)
     Error(ERR_EXIT, "debugging: increase DEBUG_NUM_TIMESTAMPS in misc.c");
 
+#if DEBUG_TIME_IN_MICROSECONDS
+  static double counter[DEBUG_NUM_TIMESTAMPS][2];
+  char *unit = "ms";
+
+  counter[counter_nr][0] = Counter_Microseconds();
+#else
+  static int counter[DEBUG_NUM_TIMESTAMPS][2];
+  char *unit = "s";
+
   counter[counter_nr][0] = Counter();
+#endif
 
-  if (message)
-    printf("%s %.2f seconds\n", message,
-	   (float)(counter[counter_nr][0] - counter[counter_nr][1]) / 1000);
+  timestamp_interval = counter[counter_nr][0] - counter[counter_nr][1];
+  counter[counter_nr][1] = counter[counter_nr][0];
 
-  counter[counter_nr][1] = Counter();
+  if (message)
+#if 1
+    Error(ERR_DEBUG, "%s%s%s %.3f %s",
+#else
+    printf("%s%s%s %.3f %s\n",
+#endif
+	   debug_print_timestamp_get_padding(counter_nr * indent_size),
+	   message,
+	   debug_print_timestamp_get_padding(padding_size - strlen(message)),
+	   timestamp_interval / 1000,
+	   unit);
 }
 
 void debug_print_parent_only(char *format, ...)
@@ -2766,3 +3572,69 @@ void debug_print_parent_only(char *format, ...)
     printf("\n");
   }
 }
+
+void print_timestamp_ext(char *message, char *mode)
+{
+#if DEBUG_PRINT_INIT_TIMESTAMPS
+  static char *debug_message = NULL;
+  static char *last_message = NULL;
+  static int counter_nr = 0;
+  int max_depth = DEBUG_PRINT_INIT_TIMESTAMPS_DEPTH;
+
+  checked_free(debug_message);
+  debug_message = getStringCat3(mode, " ", message);
+
+  if (strEqual(mode, "INIT"))
+  {
+    debug_print_timestamp(counter_nr, NULL);
+
+    if (counter_nr + 1 < max_depth)
+      debug_print_timestamp(counter_nr, debug_message);
+
+    counter_nr++;
+
+    debug_print_timestamp(counter_nr, NULL);
+  }
+  else if (strEqual(mode, "DONE"))
+  {
+    counter_nr--;
+
+    if (counter_nr + 1 < max_depth ||
+	(counter_nr == 0 && max_depth == 1))
+    {
+      last_message = message;
+
+      if (counter_nr == 0 && max_depth == 1)
+      {
+	checked_free(debug_message);
+	debug_message = getStringCat3("TIME", " ", message);
+      }
+
+      debug_print_timestamp(counter_nr, debug_message);
+    }
+  }
+  else if (!strEqual(mode, "TIME") ||
+	   !strEqual(message, last_message))
+  {
+    if (counter_nr < max_depth)
+      debug_print_timestamp(counter_nr, debug_message);
+  }
+#endif
+}
+
+void print_timestamp_init(char *message)
+{
+  print_timestamp_ext(message, "INIT");
+}
+
+void print_timestamp_time(char *message)
+{
+  print_timestamp_ext(message, "TIME");
+}
+
+void print_timestamp_done(char *message)
+{
+  print_timestamp_ext(message, "DONE");
+}
+
+#endif	/* DEBUG */