Don't successfully save a savegame if a buffer overrun occurs, and don't

overwrite the existing savegame.

Subversion-branch: /trunk/chocolate-doom
Subversion-revision: 1119

1 files changed, 26 insertions, 1 deletions

diff --git a/src/p_saveg.c b/src/p_saveg.c
index afd3852d..40b5f988 100644
--- a/src/p_saveg.c
+++ b/src/p_saveg.c
@@ -44,11 +44,36 @@
 FILE *save_stream;
 int savegamelength;
 
+// Get the filename of a temporary file to write the savegame to.  After
+// the file has been successfully saved, it will be renamed to the 
+// real file.
+
+char *P_TempSaveGameFile(void)
+{
+    static char *filename = NULL;
+
+    if (filename == NULL)
+    {
+        filename = malloc(strlen(savegamedir) + 32);
+    }
+
+    sprintf(filename, "%stemp.dsg", savegamedir);
+
+    return filename;
+}
+
+// Get the filename of the save game file to use for the specified slot.
+
 char *P_SaveGameFile(int slot)
 {
-    static char filename[256];
+    static char *filename = NULL;
     char basename[32];
 
+    if (filename == NULL)
+    {
+        filename = malloc(strlen(savegamedir) + 32);
+    }
+
     sprintf(basename, DEH_String(SAVEGAMENAME "%d.dsg"), slot);
 
     sprintf(filename, "%s%s", savegamedir, basename);