/* Safe version of strerror for MinGW, for GDB, the GNU debugger. Copyright (C) 2006-2015 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 3 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, see <http://www.gnu.org/licenses/>. */ #include "common-defs.h" #include <windows.h> /* Implementation of safe_strerror as defined in common-utils.h. 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; }