1 files changed, 50 insertions, 0 deletions
diff --git a/winsup/cygwin/assert.cc b/winsup/cygwin/assert.cc
new file mode 100644
index 000000000..98acb6d88
--- /dev/null
+++ b/winsup/cygwin/assert.cc
@@ -0,0 +1,50 @@
+/* assert.cc: Handle the assert macro for WIN32.
+
+   Copyright 1997, 1998, 2000 Cygnus Solutions.
+
+This file is part of Cygwin.
+
+This software is a copyrighted work licensed under the terms of the
+Cygwin license.  Please consult the file "CYGWIN_LICENSE" for
+details. */
+
+#include "winsup.h"
+
+#include <assert.h>
+#include <stdlib.h>
+#include <stdio.h>
+
+/* This function is called when the assert macro fails.  This will
+   override the function of the same name in newlib.  */
+
+extern "C" void
+__assert (const char *file, int line, const char *failedexpr)
+{
+  HANDLE h;
+
+  /* If we don't have a console in a Windows program, then bring up a
+     message box for the assertion failure.  */
+
+  h = CreateFileA ("CONOUT$", GENERIC_WRITE, FILE_SHARE_WRITE, &sec_none_nih,
+		   OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL);
+  if (h == INVALID_HANDLE_VALUE || h == 0)
+    {
+      char *buf;
+
+      buf = (char *) alloca (100 + strlen (failedexpr));
+      siprintf (buf, "Failed assertion\n\t%s\nat line %d of file %s",
+		failedexpr, line, file);
+      MessageBox (NULL, buf, NULL, MB_OK | MB_ICONERROR | MB_TASKMODAL);
+    }
+  else
+    {
+      CloseHandle (h);
+      (void) fiprintf (stderr,
+		       "assertion \"%s\" failed: file \"%s\", line %d\n",
+		       failedexpr, file, line);
+    }
+
+  abort ();
+
+  /* NOTREACHED */
+}