//----------------------------------------------------------------------------//
//                           GNU GPL OS/K                                     //
//                                                                            //
//  Desc:       How NOT to panic 101                                          //
//                                                                            //
//                                                                            //
//  Copyright © 2018-2019 The OS/K Team                                       //
//                                                                            //
//  This file is part of OS/K.                                                //
//                                                                            //
//  OS/K 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         //
//  any later version.                                                        //
//                                                                            //
//  OS/K 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 OS/K.  If not, see <https://www.gnu.org/licenses/>.            //
//----------------------------------------------------------------------------//

#include <kernel/term.h>
#include <kernel/panic.h>

//
// Failed assert() handler
//
noreturn void __assert_handler(const char *msg,
                               const char *file,
                               int line,
                               const char *func)
{
    KeDisableIRQs();

    (void)file; (void)line; (void)func;

    KeStartPanic("In function '%s', from %s line %d - assertion failed: '%s'",
                   func, file, line, msg);
}

//
// Your best boy panic()
// This is CPU local...
//
noreturn void KeStartPanic(const char *fmt, ...)
{
    va_list ap;

    KeDisableIRQs();

    if (PsGetCurProc()) _PsSetCurProc(NULL);
    if (StdOut == NULL) KeCrashSystem();

    if (fmt == NULL) {
        fmt = "(no message given)";
    }

    if (KePanicStr[0] != 0) {
        PrintOnTermUnlocked(StdOut, "\nDouble panic!");
        KeHaltCPU();
    }

    va_start(ap, fmt);
    vsnprintf((char *)KePanicStr, PANICSTR_SIZE, fmt, ap);
    va_end(ap);

    PrintOnTermUnlocked(StdOut, "\nPanic!\n\n");
    PrintOnTermUnlocked(StdOut, (char *)KePanicStr);

    KeHaltCPU();
}

//
// Oh well
//
noreturn void KeCrashSystem(void)
{
    while (1) {
        KeDisableIRQs();
        KeHaltCPU();
    }
}