Bool Option(I64 num, Bool val)
{//Set compiler Option to val.
    return BEqual(&Fs->last_cc->opts, num, val);
}

Bool OptionGet(I64 num)
{//Get state of compiler option.
    return Bt(&Fs->last_cc->opts, num);
}

asm {
_LAST_FUN::         //See _CALL_IND
                PUSH        RBP
                MOV         RBP, RSP
                PUSH        RSI
                PUSH        RDI

                XOR         RAX, RAX
                MOV         RAX, FS:CTask.last_fun[RAX]
                TEST        RAX, RAX
                JZ          @@10
                MOV         RDX, U64 CHashFun.exe_addr[RAX]

                MOV         RCX, U64 SF_ARG1[RBP] // argc
                MOV         RSI, U64 SF_ARG2[RBP] // argv
                SHL         RCX, 3
                SUB         RSP, RCX
                MOV         RDI, RSP
                REP_MOVSB
                TEST        RDX, RDX
                JZ          @@05

                CALL        RDX
                POP         RDI
                POP         RSI
                POP         RBP
                RET1        16

@@05:           MOV         RCX, U64 SF_ARG1[RBP] // argc
                SHL         RCX, 3
                ADD         RSP, RCX
                XOR         RAX, RAX
@@10:           POP         RDI
                POP         RSI
                POP         RBP
                RET1        16
}
_extern _LAST_FUN I64 LastFun(I64 argc, I64 *argv); //Execute last fun with args.

I64 PassTrace(I64 i=0b10001111101)
{//Ctrls which optimizer passes are displayed.
    I64 old = Fs->last_cc->pass_trace;

    if (i)
        Fs->last_cc->saved_pass_trace = i;
    Fs->last_cc->pass_trace = i;

    return old;
}

Bool Trace(Bool val=ON)
{//Displays assembly code output from compiler.
    return Option(OPTf_TRACE, val);
}

Bool Echo(Bool val)
{//Displays text as it is being compiled.
    return Option(OPTf_ECHO, val);
}

U0 StreamPrint(U8 *format, ...)
{//Injects text into the compile stream. Used in #exe{} blocks.
    U8          *buf = StrPrintJoin(NULL, format, argc, argv), *st;
    CCompCtrl   *cc = Fs->last_cc;
    CStreamBlk  *tmpe = cc->last_stream_blk;

    if (tmpe != &cc->next_stream_blk)
    {
        st = MStrPrint("%s%s", tmpe->body, buf);
        Free(tmpe->body);
        tmpe->body = st;
    }
    else
        PrintErr("No exe{} blk\n");
    Free(buf);
}

U0 StreamDir()
{
    U8 *dirname;

    if (dirname = DirFile(Fs->last_cc->lex_include_stack->full_name))
    {
        StreamPrint("\"%s\"", dirname);
        Free(dirname);
    }
}

CD2I32 *LexD2I32(CCompCtrl *cc, CD2I32 *p)
{//Not CosmiC. Sprite-like lex 2D point.
    if (cc->token != '(')
        LexExcept(cc, "Expecting '(' at ");
    Lex(cc); // Skip (
    p->x = LexExpressionI64(cc);
    if (cc->token != ',')
        LexExcept(cc, "Expecting ',' at ");
    Lex(cc); // Skip ,
    p->y = LexExpressionI64(cc);
    if (cc->token != ')')
        LexExcept(cc, "Expecting ')' at ");
    Lex(cc); // Skip )

    return p;
}

CD3I32 *LexD3I32(CCompCtrl *cc,CD3I32 *p)
{//Not CosmiC. Sprite-like lex 3D point.
    if (cc->token != '(')
        LexExcept(cc, "Expecting '(' at ");
    Lex(cc); // Skip (
    p->x = LexExpressionI64(cc);
    if (cc->token != ',')
        LexExcept(cc, "Expecting ',' at ");
    Lex(cc); // Skip ,
    p->y = LexExpressionI64(cc);
    if (cc->token != ',')
        LexExcept(cc, "Expecting ',' at ");
    Lex(cc); // Skip ,
    p->z = LexExpressionI64(cc);
    if (cc->token != ')')
        LexExcept(cc, "Expecting ')' at ");
    Lex(cc); // Skip )

    return p;
}

U8 *CmdLinePrompt()
{
    I64 i;
    U8 *res, *st;

    if (Fs->new_answer)
    {
        if (Fs->answer_type & ~1 != RT_I0)
        {
            if (Fs->answer_type == RT_F64)
                "%8.6fs ansf=%15.7g\n", Fs->answer_time, Fs->answer;
            else
                "%8.6fs ans=0x%08X=%d\n", Fs->answer_time, Fs->answer, Fs->answer;
        }
        else
        {
            "%8.6fs\n", Fs->answer_time;
            Fs->answer = 0;
        }
        Fs->new_answer = FALSE;
    }
    if (st = DirCur)
    {
        "%s", st;
        Free(st);
    }
    '>';
    if (IsDebugMode && IsRaw)
        RawDr;

    LBts(&Fs->task_flags, TASKf_CMD_LINE_PROMPT);
    st = StrGet(,, SGF_SHIFT_ESC_EXIT);
    LBtr(&Fs->task_flags, TASKf_CMD_LINE_PROMPT);

    i = StrLen(st);
    res = MAlloc(i + 1 + 2);
    MemCopy(res, st, i + 1);
    i--;
    while (i >= 0 && Bt(char_bmp_white_space, res[i]))
        i--;
    i++;
    if (i > 0 && res[i - 1] == ';')
        res[i++] = ';'; // The Lex goes one beyond
    res[i++] = '\n';    // #define goes to '\n'
    res[i] = 0;

    Free(st);

    return res;
}