(svn r3214) -Feature: openttd.cfg can now set how many autosaves to keep before starting to overwrite old ones

	max_autosave_num in the config files sets the number of autosaves to keep (default 16)
	MAX_NUM_AUTOSAVES in Makefile.config sets the default value. 16 is used if no value is given
	this behaviour can still be overwritten by keep_all_autosave (openttd.config setting)
	Note: this is a requested behaviour for PDA ports, since they got limited storage space

1 files changed, 8 insertions, 4 deletions

diff --git a/openttd.c b/openttd.c
index e63685382..cc4732df7 100644
--- a/openttd.c
+++ b/openttd.c
@@ -888,10 +888,14 @@ static void DoAutosave(void)
 		SetDParam(2, _date);
 		s = GetString(buf + strlen(_path.autosave_dir) + strlen(PATHSEP), STR_4004);
 		strcpy(s, ".sav");
-	} else { /* Save a maximum of 15 autosaves */
-		int n = _autosave_ctr;
-		_autosave_ctr = (_autosave_ctr + 1) & 15;
-		sprintf(buf, "%s%sautosave%d.sav", _path.autosave_dir, PATHSEP, n);
+	} else { /* generate a savegame name and number according to _patches.max_num_autosaves */
+		sprintf(buf, "%s%sautosave%d.sav", _path.autosave_dir, PATHSEP, _autosave_ctr);
+
+		_autosave_ctr++;
+		if (_autosave_ctr >= _patches.max_num_autosaves) {
+			// we reached the limit for numbers of autosaves. We will start over
+			_autosave_ctr = 0;
+		}
 	}
 
 	DEBUG(misc, 2) ("Autosaving to %s", buf);