Function ScriptEngineFunctionPrintf

hyperdbg/script-eval/code/Functions.c:1570–1787

* @brief Implementation of printf function * * @param GuestRegs * @param ActionDetail * @param ScriptGeneralRegisters * @param Tag * @param ImmediateMessagePassing * @param Format * @param ArgCount * @param FirstArg * @param HasError * @return VOID */

 * @return VOID
 */
VOID
ScriptEngineFunctionPrintf(PGUEST_REGS                       GuestRegs,
                           ACTION_BUFFER *                   ActionDetail,
                           SCRIPT_ENGINE_GENERAL_REGISTERS * ScriptGeneralRegisters,
                           UINT64                            Tag,
                           BOOLEAN                           ImmediateMessagePassing,
                           char *                            Format,
                           UINT64                            ArgCount,
                           PSYMBOL                           FirstArg,
                           BOOLEAN *                         HasError)
{
    //
    // *** The printf function ***
    //

    char    FinalBuffer[PacketChunkSize]              = {0};
    UINT32  CurrentPositionInFinalBuffer              = 0;
    UINT32  CurrentProcessedPositionFromStartOfFormat = 0;
    BOOLEAN WithoutAnyFormatSpecifier                 = TRUE;

    UINT64  Val;
    UINT32  Position;
    UINT32  LenOfFormats = (UINT32)strlen(Format) + 1;
    PSYMBOL Symbol;

    *HasError = FALSE;

    for (int i = 0; i < ArgCount; i++)
    {
        WithoutAnyFormatSpecifier = FALSE;
        Symbol                    = FirstArg + i;

        //
        // Address is either wstring (%ws) or string (%s)
        //

        Position = (Symbol->Type >> 32) + 1;

        SYMBOL TempSymbol = {0};
        memcpy(&TempSymbol, Symbol, sizeof(SYMBOL));
        TempSymbol.Type &= 0x7fffffff;

        Val = GetValue(GuestRegs, ActionDetail, ScriptGeneralRegisters, &TempSymbol, FALSE);

        CHAR PercentageChar = Format[Position];

        // printf("position = %d is %c%c \n", Position, PercentageChar, IndicatorChar1);

        if (CurrentProcessedPositionFromStartOfFormat != Position)
        {
            //
            // There is some strings before this format specifier
            // we should move it to the buffer
            //
            UINT32 StringLen = Position - CurrentProcessedPositionFromStartOfFormat;

            //
            // Check final buffer capacity