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Check for success of the FormatMessageW() call.

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This commit is contained in:
ManoloFLTK 2020-04-23 11:28:18 +02:00
parent 2ced142adc
commit f11a80482a
1 changed files with 16 additions and 14 deletions
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30
src/drivers/WinAPI/Fl_WinAPI_Printer_Driver.cxx
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@ -119,20 +119,22 @@ int Fl_WinAPI_Printer_Driver::begin_job (int pagecount, int *frompage, int *topa
err = (dw == ERROR_CANCELLED ? 1 : 2);
if (perr_message && err == 2) {
wchar_t *lpMsgBuf;
FormatMessageW(FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_IGNORE_INSERTS,
NULL,
dw,
MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
(LPWSTR) &lpMsgBuf,
0, NULL);
unsigned srclen = lstrlenW(lpMsgBuf) - 2; // ignore terminal ^M
unsigned l = fl_utf8fromwc(NULL, 0, lpMsgBuf, srclen);
char *tmp = new char[l+1];
fl_utf8fromwc(tmp, l, lpMsgBuf, srclen);
LocalFree(lpMsgBuf);
*perr_message = new char[l + 50];
sprintf(*perr_message, "begin_job() failed with error %lu: %s", dw, tmp);
delete[] tmp;
DWORD retval = FormatMessageW(
FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_IGNORE_INSERTS,
NULL,
dw,
MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
(LPWSTR) &lpMsgBuf,
0, NULL);
if (retval) {
unsigned srclen = lstrlenW(lpMsgBuf);
while (srclen > 0 && (lpMsgBuf[srclen-1] == '\n' || lpMsgBuf[srclen-1] == '\r')) srclen--;
unsigned l = fl_utf8fromwc(NULL, 0, lpMsgBuf, srclen);
*perr_message = new char[l+51];
sprintf(*perr_message, "begin_job() failed with error %lu: ", dw);
fl_utf8fromwc(*perr_message + strlen(*perr_message), l+1, lpMsgBuf, srclen);
LocalFree(lpMsgBuf);
}
}
}
}