1 files changed, 71 insertions, 0 deletions
diff --git a/gdb/mingw-hdep.c b/gdb/mingw-hdep.c
new file mode 100644
index 00000000000..1318cfdd38e
--- /dev/null
+++ b/gdb/mingw-hdep.c
@@ -0,0 +1,71 @@
+/* Host support routines for MinGW, for GDB, the GNU debugger.
+
+   Copyright (C) 2006
+   Free Software Foundation, Inc.
+
+   This file is part of GDB.
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 2 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software
+   Foundation, Inc., 51 Franklin Street, Fifth Floor,
+   Boston, MA 02110-1301, USA.  */
+
+#include "defs.h"
+
+#include "gdb_string.h"
+
+#include <windows.h>
+
+/* The strerror() function can return NULL for errno values that are
+   out of range.  Provide a "safe" version that always returns a
+   printable string.
+
+   The Windows runtime implementation of strerror never returns NULL,
+   but does return a useless string for anything above sys_nerr;
+   unfortunately this includes all socket-related error codes.
+   This replacement tries to find a system-provided error message.  */
+
+char *
+safe_strerror (int errnum)
+{
+  static char *buffer;
+  int len;
+
+  if (errnum >= 0 && errnum < sys_nerr)
+    return strerror (errnum);
+
+  if (buffer)
+    {
+      LocalFree (buffer);
+      buffer = NULL;
+    }
+
+  if (FormatMessage (FORMAT_MESSAGE_ALLOCATE_BUFFER
+		     | FORMAT_MESSAGE_FROM_SYSTEM,
+		     NULL, errnum,
+		     MAKELANGID (LANG_NEUTRAL, SUBLANG_DEFAULT),
+		     (LPTSTR) &buffer, 0, NULL) == 0)
+    {
+      static char buf[32];
+      xsnprintf (buf, sizeof buf, "(undocumented errno %d)", errnum);
+      return buf;
+    }
+
+  /* Windows error messages end with a period and a CR-LF; strip that
+     out.  */
+  len = strlen (buffer);
+  if (len > 3 && strcmp (buffer + len - 3, ".\r\n") == 0)
+    buffer[len - 3] = '\0';
+
+  return buffer;
+}