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/*
* tclWinPanic.c --
*
* Contains the Windows-specific command-line panic proc.
*
* Copyright © 2013 Jan Nijtmans.
* All rights reserved.
*
* See the file "license.terms" for information on usage and redistribution of
* this file, and for a DISCLAIMER OF ALL WARRANTIES.
*/
#include "tclInt.h"
/*
*----------------------------------------------------------------------
*
* Tcl_ConsolePanic --
*
* Display a message. If a debugger is present, present it directly to
* the debugger, otherwise send it to stderr.
*
* Results:
* None.
*
* Side effects:
* None.
*
*----------------------------------------------------------------------
*/
TCL_NORETURN void
Tcl_ConsolePanic(
const char *format, ...)
{
#define TCL_MAX_WARN_LEN 26000
va_list argList;
WCHAR msgString[TCL_MAX_WARN_LEN];
char buf[TCL_MAX_WARN_LEN * 3];
HANDLE handle = GetStdHandle(STD_ERROR_HANDLE);
DWORD dummy;
va_start(argList, format);
vsnprintf(buf+3, sizeof(buf)-3, format, argList);
buf[sizeof(buf)-1] = 0;
msgString[TCL_MAX_WARN_LEN-1] = '\0';
MultiByteToWideChar(CP_UTF8, 0, buf+3, -1, msgString, TCL_MAX_WARN_LEN);
/*
* Truncate MessageBox string if it is too long to not overflow the buffer.
*/
if (msgString[TCL_MAX_WARN_LEN-1] != '\0') {
memcpy(msgString + (TCL_MAX_WARN_LEN - 5), L" ...", 5 * sizeof(WCHAR));
}
if (IsDebuggerPresent()) {
OutputDebugStringW(msgString);
} else if (_isatty(2)) {
WriteConsoleW(handle, msgString, (DWORD)wcslen(msgString), &dummy, 0);
} else {
buf[0] = '\xEF'; buf[1] = '\xBB'; buf[2] = '\xBF'; /* UTF-8 bom */
WriteFile(handle, buf, (DWORD)strlen(buf), &dummy, 0);
WriteFile(handle, "\n", 1, &dummy, 0);
FlushFileBuffers(handle);
}
# if defined(__GNUC__)
__builtin_trap();
# elif defined(_WIN64)
__debugbreak();
# elif defined(_MSC_VER)
_asm {int 3}
# else
DebugBreak();
# endif
#if defined(_WIN32)
ExitProcess(1);
#else
abort();
#endif
}
/*
* Local Variables:
* mode: c
* c-basic-offset: 4
* fill-column: 78
* tab-width: 8
* End:
*/
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