SysFn47:DrawNumber

• 0CodErr

  Posts 1498

  Joined: Sun Oct 30, 2011 6:43 pm

  Wed Mar 07, 2018 10:24 pm

  ======================================================================
  ============= Function 47 - draw a number in the window. =============
  ======================================================================
  Parameters:
  * eax = 47 - function number
  * ebx = parameters of conversion number to text:
  ............................................................................
  * bh = 2 - display in binary system
  ............................................................................
  * bit 30 set = display qword (64-bit) number (must be bl=1)
  ............................................................................
  Remarks:
  * The given length must not exceed 60.
  ............................................................................

  В kernel.asm происходят такие проверки:

  Code: Select all

  display_number:
  ............................................................................
  display_number_force:
          push    eax
          and     eax, 0x3fffffff
          cmp     eax, 0xffff     ; length > 0 ?
          pop     eax
          jge     cont_displ
          ret
     cont_displ:
          push    eax
          and     eax, 0x3fffffff
          cmp     eax, 61*0x10000  ; length <= 60 ?
          pop     eax
          jb      cont_displ2
          ret
     cont_displ2:
  ............................................................................   

  Но логика подсказывает, что двоичное представление числа, размером 64 бита, может быть больше, чем 60.

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