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Index > Macroinstructions > printf macro for display message

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chken



Joined: 24 Feb 2011
Posts: 2
chken
Code:
printf "%s : %d ", "size", 1024
    


compile,display

size : 1024

who can write it.
Post 06 May 2011, 22:13
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LocoDelAssembly
Your code has a bug


Joined: 06 May 2005
Posts: 4633
Location: Argentina
LocoDelAssembly
It is something like this:
Code:
; revolution is the author of the next two macros
macro display_decimal value*,put_zeros {
    local leading_zero,digit,divisor,number
    number=value
    if number=1 shl 63
        display '-9223372036854775808'
    else
        if number<0
            number=-number
            display '-'
        end if
        leading_zero=put_zeros+0
        divisor=1000000000000000000
        while divisor>0
            digit=number/divisor
            leading_zero=leading_zero+digit
            if leading_zero | (divisor=1)
                display digit+'0'
                number=number-digit*divisor
            end if
            divisor=divisor/10
        end while
    end if
}
macro display_unsigned value* {
    local number
    number=value
    if number<0
        number=number-10000000000000000000
        if number<0
            number=number+1000000000000000000
            display '9'
            display_decimal number
        else
            display '1'
            display_decimal number,1
        end if
    else
        display_decimal number
    end if
}


; Now my part Very Happy
macro printf fmt*, [args]{
common
local p, s, i, c

   p = 0
   s = 0

   virtual at 0
      db fmt

      repeat $
         load c byte from % - 1

         if ((~s) & (c <> '%')) | ((s) & (c = '%'))
            display c

            s = 0
         else if c = '%'

            s = 1
         else
            i = 0
forward
            if i = p
               if c = 's'
                  display args
               else if c = 'd'
                  display_decimal args, 0
               else
                  err 'Huh! What?!'
               end if
            end if

            i = i + 1
common
            s = 0
            p = p + 1
         end if
      end repeat
  end virtual
}


printf "%s : %d ", "size", 1024    
If you add the missing conversions please share here.
Post 07 May 2011, 00:24
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chken



Joined: 24 Feb 2011
Posts: 2
chken
Very Happy Thank you very much!
Post 08 May 2011, 11:02
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ketmar_



Joined: 19 Jan 2012
Posts: 1
ketmar_
very wordy and lame printf extension. now it understands "%x" and width modifier, so this is perfectly valid: dprintf "%10s %03d %-5d!\n", "str0", 42, 666
note "\n" usage. %-)
Code:
macro printf_display_format_decimal_minint length, zero_fill, lpad {
  local filler, minusok, len
  ;
  minusok = 0
  len = length-20  ; -9223372036854775808
  if (len > 0) & (lpad <> 0)
    if zero_fill > 0
      minusok = 1
      display '-'
      len = len-1
    end if
    while len > 0
      display filler
      len = len-1
    end while
  end if
  if minusok = 0
    len = len-1
    display '-'
  end if
  display "9223372036854775808"
  if (len > 0) & (lpad = 0)
    while len > 0
      display ' '
      len = len-1
    end while
  end if
}


macro printf_display_format_num num, length, zero_fill, lpad, base, alphaupcased {
  local leading_zero, digit, divisor, cnt, filler, minusok, len, number, nn
  ;
  if num = 1 shl 63
    ; special case
    printf_display_format_decimal_minint length, zero_fill, lpad
  else
    len = length
    number = num
    minusok = 0
    ; determine string representation length
    if number < 0
      minusok = 0
      number = -number
      len = len-1
    else
      minusok = 1
    end if
    ;
    cnt = 1
    if number >= base
      divisor = 1
      nn = number/base
      while nn > 0
        cnt = cnt+1
        nn = nn/base
        divisor = divisor*base
      end while
    else
      divisor = base
    end if
    ;
    len = len-cnt  ; compensate size
    ; left fill
    if (len > 0) & (lpad <> 0)
      if zero_fill > 0
        filler = '0'
        if minusok = 0
          minusok = 1
          display '-'
        end if
      else
        filler = ' '
      end if
      while len > 0
        display filler
        len = len-1
      end while
    end if
    ; minus
    if minusok = 0
      display '-'
    end if
    ; number
    while cnt > 0
      digit = number/divisor
      number = number-digit*divisor
      divisor = divisor/base
      cnt = cnt-1
      if digit > 9
        if alphaupcased <> 0
          digit = digit+7
        else
          digit = digit+39
        end if
      end if
      display digit+'0'
    end while
    ; right fill
    if (len > 0) & (lpad = 0)
      while len > 0
        display ' '
        len = len-1
      end while
    end if
  end if
}


macro printf_display_helper freevirt, value, fmt, length, zero_fill, lpad {
  local slen, len, filler
  ;
#if 0
  display "[", fmt, "]", 10
  ;
  display " length="
  printf_display_format_unsigned length
  display 10
  ;
  display " zero_fill="
  printf_display_format_unsigned zero_fill
  display 10
  ;
  display " lpad="
  printf_display_format_unsigned lpad
  display 10
  ;
  display " freevirt="
  printf_display_format_unsigned freevirt
  display 10
  ;
  display "==============", 10
end if
  if fmt = 's'
    virtual at freevirt
      db value
      slen = $-freevirt
    end virtual
    len = length-slen
    ;
    if (len > 0) & (lpad <> 0)
      if zero_fill > 0
        filler = '0'
      else
        filler = ' '
      end if
      while len > 0
        display filler
        len = len-1
      end while
    end if
    display value
    if (len > 0) & (lpad = 0)
      while len > 0
        display ' '
        len = len-1
      end while
    end if
  else if fmt = 'd'
    printf_display_format_num value, length, zero_fill, lpad, 10, 0
  else if fmt = 'u'
    ;FIXME!
    printf_display_format_num value, length, zero_fill, lpad, 10, 0
  else if fmt = 'x'
    printf_display_format_num value, length, zero_fill, lpad, 16, 0
  else if fmt = 'X'
    printf_display_format_num value, length, zero_fill, lpad, 16, 1
  else
    display "FATAL: invalid format directive: '", fmt, "'", 10
    err 'Huh! What?!'
  end if
  ;display "|", 10, "--------------", 10
}


macro printf fmt*, [args] {
common
  local curargnum, state, f, curch, fmtlength, fmtzeropad, fmtleftpad, freevirt
  ; state machine:
  ;  0: normal char; check for specials or print
  ;  1: just after '\'
  ;  2: formatting directive just started
  ;  3: parsing formatting directive length
  ;  4: at format directive
  curargnum = 0
  state = 0
  ;display "**************************", 10
  virtual at 0
    db fmt
    freevirt = $+8
    repeat $
      load curch byte from %-1
      ;display "*state: ", state+'0', "; curch=[", curch, "]", 10
      if state = 0
        ; normal
        if curch = '\'
          state = 1
        else if curch = '%'
          state = 2
        else
          display curch
        end if
      else if state = 1
        ; escape
        state = 0
        if curch = 'n'
          display 10
        else if curch = 'r'
          display 13
        else if curch = 't'
          display 9
        else if curch = 'a'
          display 8
        else if curch = 'e'
          display 27
        else
          display curch
        end if
      else if state = 2
        ; first char of format directive
        state = 3
        fmtdir = ' '
        fmtlength = 0
        fmtzeropad = -1
        if curch = '-'
          fmtleftpad = 0
        else if (curch >= '0') & (curch <= '9')
          fmtleftpad = 1
          if curch = '0'
            fmtzeropad = 1
          else
            fmtzeropad = 0
          end if
          fmtlength = curch-'0'
        else if curch = '%'
          state = 0
          display '%'
        else
          state = 0
          f = 0
forward
          ; process all varargs
          if f = curargnum
            printf_display_helper freevirt, args, curch, fmtlength, fmtzeropad, fmtleftpad
          end if
          f = f+1
common
          curargnum = curargnum+1
        end if
      else if state = 3
        ; in length
        if (curch >= '0') & (curch <= '9')
          if fmtzeropad < 0
            if curch = '0'
              fmtzeropad = 1
            else
              fmtzeropad = 0
            end if
          end if
          fmtlength = fmtlength*10+curch-'0'
        else
          state = 0
          f = 0
forward
          ; process all varargs
          if f = curargnum
            printf_display_helper freevirt, args, curch, fmtlength, fmtzeropad, fmtleftpad
          end if
          f = f+1
common
          curargnum = curargnum+1
        end if
      end if
    end repeat
  end virtual
}


printf "%s\n", "size"
printf "%10s: %07d %08x %-10s|\n", "size", -1024, 16385, "str0"
    
Post 19 Jan 2012, 04:35
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gulrak



Joined: 17 Jun 2006
Posts: 1
gulrak
I was looking for something like this. Thanks to revolution, LocoDelAssembly and ketmar_ for doing the work, but trying it, I found a bug:

for %d or %x with a value less than the base, if simply prints 0. The reason is

Code:
   if number >= base
      divisor = 1
      nn = number/base
      while nn > 0
        cnt = cnt+1
        nn = nn/base
        divisor = divisor*base
      end while
    else
      divisor = base ; <- this should be divisor = 1
    end if
    


in printf_display_format_num. Setting the divisor for single digit values to base, leaves 0 after the the first digit = number/divisor later in the code.

With that fix it at least worked for my tests.
Post 30 Sep 2012, 20:32
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