From d98a8476ebddd1bf05197cce949646f2116ee1a6 Mon Sep 17 00:00:00 2001
From: Fabian Greffrath <fabian@greffrath.com>
Date: Sat, 20 Jul 2024 12:53:53 +0200
Subject: [PATCH] check for existing savegame files ignoring case (#1797)

* check for existing savegame files ignoring case

* variable naming
---
 src/g_game.c | 33 +++++++++++++++++++++++++++++----
 1 file changed, 29 insertions(+), 4 deletions(-)

diff --git a/src/g_game.c b/src/g_game.c
index 79f3039d..ba2da058 100644
--- a/src/g_game.c
+++ b/src/g_game.c
@@ -2159,14 +2159,39 @@ char* G_SaveGameName(int slot)
   char buf[16] = {0};
   sprintf(buf, "%.7s%d.dsg", savegamename, 10*savepage+slot);
 
-  return M_StringJoin(basesavegame, DIR_SEPARATOR_S, buf);
+  char *filepath = M_StringJoin(basesavegame, DIR_SEPARATOR_S, buf);
+  char *existing = M_FileCaseExists(filepath);
+
+  if (existing)
+  {
+    free(filepath);
+    return existing;
+  }
+  else
+  {
+    char *filename = (char *)M_BaseName(filepath);
+    M_StringToLower(filename);
+    return filepath;
+  }
 }
 
 char* G_MBFSaveGameName(int slot)
 {
-   char buf[16] = {0};
-   sprintf(buf, "MBFSAV%d.dsg", 10*savepage+slot);
-   return M_StringJoin(basesavegame, DIR_SEPARATOR_S, buf);
+  char buf[16] = {0};
+  sprintf(buf, "MBFSAV%d.dsg", 10*savepage+slot);
+
+  char *filepath = M_StringJoin(basesavegame, DIR_SEPARATOR_S, buf);
+  char *existing = M_FileCaseExists(filepath);
+
+  if (existing)
+  {
+    free(filepath);
+    return existing;
+  }
+  else
+  {
+    return filepath;
+  }
 }
 
 // killough 12/98: