From 94e3856b769f0380d1dbd2bc4f8a5dcaa5d1c358 Mon Sep 17 00:00:00 2001
From: helixhorned <helixhorned@1a8010ca-5511-0410-912e-c29ae57300e0>
Date: Sun, 27 Oct 2013 21:12:25 +0000
Subject: [PATCH] SDL2/non-Windows: Before showing "simple message box",
 replace tabs with spaces.

Because the one implemented on top of X shows a special mark for tabs instead of
whitespace.
Also, in wm_msgbox(), use vsnprintf.

git-svn-id: https://svn.eduke32.com/eduke32@4120 1a8010ca-5511-0410-912e-c29ae57300e0
---
 polymer/eduke32/build/src/sdlayer.c | 12 +++++++++++-
 1 file changed, 11 insertions(+), 1 deletion(-)

diff --git a/polymer/eduke32/build/src/sdlayer.c b/polymer/eduke32/build/src/sdlayer.c
index 698a65545..3af08abcb 100644
--- a/polymer/eduke32/build/src/sdlayer.c
+++ b/polymer/eduke32/build/src/sdlayer.c
@@ -154,7 +154,7 @@ int32_t wm_msgbox(char *name, char *fmt, ...)
     UNREFERENCED_PARAMETER(name);
 
     va_start(va,fmt);
-    vsprintf(buf,fmt,va);
+    vsnprintf(buf,sizeof(buf),fmt,va);
     va_end(va);
 
 #if defined(__APPLE__)
@@ -162,6 +162,16 @@ int32_t wm_msgbox(char *name, char *fmt, ...)
 #elif defined HAVE_GTK2
     if (gtkbuild_msgbox(name, buf) >= 0) return 1;
 #elif SDL_MAJOR_VERSION==2
+# if !defined _WIN32
+    // Replace all tab chars with spaces because the hand-rolled SDL message
+    // box diplays the former as N/L instead of whitespace.
+    {
+        int32_t i;
+        for (i=0; i<(int32_t)sizeof(buf); i++)
+            if (buf[i] == '\t')
+                buf[i] = ' ';
+    }
+# endif
     return SDL_ShowSimpleMessageBox(SDL_MESSAGEBOX_INFORMATION, name, buf, NULL);
 #endif
     puts(buf);