Weird behaviour of console print functions

[jj2007]

Btw your printf "\n" puts out a LF only.

The printf function is written by Vortex so I guess he skipped that bit. The data storage of "\n" is always 10 (LF) and it is the _write() function that normally adds a "\r" (CR) in front if needed before calling WriteFile().

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printf proc c USES esi edi format:dword, arglist:VARARG
LOCAL buf1[512]:BYTE
LOCAL buf2[256]:BYTE
LOCAL hHandle:DWORD
LOCAL BytesWritten:DWORD

invoke  GetStdHandle,STD_OUTPUT_HANDLE
mov hHandle,eax
invoke wvsprintfA,addr buf1,format,addr arglist
lea esi,buf1
lea edi,buf2
mov edx,edi
.if byte ptr [esi] == 10
mov word ptr [edi],0A0Dh
add edi,2
add esi,1
.endif
lodsb
.while al
.if al == 10 && byte ptr [esi-1] != 13
mov byte ptr [edi],0Dh
add edi,1
.endif
stosb
lodsb
.endw
mov esi,edi
sub esi,edx
lea ecx,BytesWritten
invoke WriteFile,hHandle,edx,esi,ecx,0
mov eax,esi
ret
printf  endp


Using a simple...

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start:
  xor ebx, ebx
  .Repeat
print "M32 "
print str$(ebx), 13, 10
inc ebx
  .Until ebx>=3

  xor ebx, ebx
  .Repeat
printf("Crt %d\n", ebx)
inc ebx
  .Until ebx>=3
... you get:

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M32 0
M32 1
M32 2
Crt 0
Crt 1
Crt 2

So far, so good. It gets weird when (under Win7-64) you redirect output to a file (see attachment):
pf.exe >pf.txt

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M32 0
M32 1
M32 2
Crt 0 Crt 1 Crt 2

In a hex editor, you'll discover 0D0D0A sequences for the Crt prints.

It gets much weirder with this code:

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start:
  xor ebx, ebx
  .Repeat
print "M32 "
print str$(ebx), 13, 10
inc ebx
  .Until ebx>=3

  xor ebx, ebx
  .Repeat
printf("Crt %d\n", ebx)
inc ebx
  .Until ebx>=3

  xor ebx, ebx
  .Repeat
print "M32 "
print str$(ebx), 13, 10
inc ebx
  .Until ebx>=3

Console output:

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M32 0
M32 1
M32 2
Crt 0
Crt 1
Crt 2
M32 0
M32 1
M32 2

No surprise. But with redirection to a text file, the three Crt prints appear at the end of the text file ::)

[nidud]

deleted

[jj2007]

Even with invoke crt_printf, formatstring, number you get the same effect: the crt part appears at the end of the file:

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M32 0
M32 1
M32 2
<<< ---- should be here
M32 0
M32 1
M32 2
MB 0
MB 1
MB 2
Crt 0 Crt 1 Crt 2 <<< ---- but gets moved here, with 0d 0d 0a sequences

[nidud]

deleted

[jj2007]

Good to know, thanks :t

[nidud]

deleted

[nidud]

deleted

[RuiLoureiro]

  Hi Jochen,
how are you ?

[jj2007]

Hi Rui,
Happy Easter :icon14:
Where have you been all the time??

[ragdog]

Hello Jochen

Nice found printf replacement
http://masm32.com/board/index.php?topic=5250.msg56234#msg56234

But it support not Floating point wsprintf does not supporting.

I think is better tu use sprintf

a format string that follows the same specifications as format in printf

Greets,

[jj2007]

Hello Jochen

Nice found printf replacement
http://masm32.com/board/index.php?topic=5250.msg56234#msg56234

But it support not Floating point wsprintf does not supporting.

I think is better tu use sprintf

a format string that follows the same specifications as format in printf

Great :t
Let me know when sprintf starts supporting simple constructs like e.g.

include \masm32\MasmBasic\MasmBasic.inc      ; download
  Init
  Let edi="\Masm32\include\Windows.inc"
  Let esi=FileRead$(edi)
  Inkey "The file ", edi, Str$(" has %i lines", Count(esi, CrLf$)), Str$(" and %4f kBytes", LastFileSize/1024)
EndOfCode

Output:
The file \Masm32\include\Windows.inc has 26902 lines and 954.5 kBytes

[ragdog]

Let me know when sprintf starts supporting simple constructs like e.g.

Why not?

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.data
szStr db "The file \Masm32\include\Windows.inc has",0
kBytes real8 954.5

.code

mov ebx,26902
invoke crt_sprintf,addr plainbuf ,chr$ ("%s %i lines and %.2f kBytes",CR,LF),addr szStr,ebx,kBytes
invoke crt_puts,addr plainbuf


Output

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The file \Masm32\include\Windows.inc has 26902 lines and 954.50 kBytes

Waiting for keypress to exit....


MfG

[jj2007]

LastFileSize and Count() are not global variables, my friend :P

[RuiLoureiro]

Hi Rui,
Happy Easter :icon14:
Where have you been all the time??

Hi Jochen, my life changed a lot, home, wife,city,etc and i never did anything about the calculator since the last time. My computer is not well too.
Nice to see you again. :t :icon14:
Where is Dave ? He is here, do you know ?

[ragdog]

LastFileSize and Count() are not global variables, my friend :P

Ok i understand not MasmBasic