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