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/* Error handling for Windows
Copyright (C) 1996-2022 Free Software Foundation, Inc.
This file is part of GNU Make.
GNU Make 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.
GNU Make 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 <https://www.gnu.org/licenses/>. */
#include <stdlib.h>
#include <windows.h>
#include "makeint.h"
#include "w32err.h"
/*
* Description: the windows32 version of perror()
*
* Returns: a pointer to a static error
*
* Notes/Dependencies: I got this from
* comp.os.ms-windows.programmer.win32
*/
const char *
map_windows32_error_to_string (DWORD ercode) {
/*
* We used to have an MSVC-specific '__declspec (thread)' qualifier
* here, with the following comment:
*
* __declspec (thread) necessary if you will use multiple threads on MSVC
*
* However, Make was never multithreaded on Windows (except when
* Ctrl-C is hit, in which case the main thread is stopped
* immediately, so it doesn't matter in this context). The functions
* on sub_proc.c that started and stopped additional threads were
* never used, and are now #ifdef'ed away. Until we need more than
* one thread, we have no problems with the following buffer being
* static. (If and when we do need it to be in thread-local storage,
* the corresponding GCC qualifier is '__thread'.)
*/
static char szMessageBuffer[128];
DWORD ret;
/* Fill message buffer with a default message in
* case FormatMessage fails
*/
wsprintf (szMessageBuffer, "Error %ld", ercode);
/*
* Special code for winsock error handling.
*/
if (ercode > WSABASEERR) {
O (fatal, NILF, szMessageBuffer);
}
/*
* Default system message handling
*/
ret = FormatMessage(FORMAT_MESSAGE_FROM_SYSTEM,
NULL,
ercode,
LANG_NEUTRAL,
szMessageBuffer,
sizeof(szMessageBuffer),
NULL);
if (ret)
{
char *cp;
for (cp = szMessageBuffer + ret - 1; cp >= szMessageBuffer; --cp)
{
if (*cp != '\r' && *cp != '\n')
break;
*cp = '\0';
}
}
return szMessageBuffer;
}
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