Announcement

**Don Dickinson** · 28 Jan 2000, 08:24 PM

What is the ubound of ccData when this routine is called? What line does it gpf on exactly>
--Don

**Scott Turchin** · 28 Jan 2000, 08:42 PM

Code:

OK I fixed that array problem, ccData() is dimmed 1 to 1000, so 1000 transactions can be processed at one time, however this output file only gets written from web based use, so ccData(1).x will always be accurate, it is done in the ProcessCreditCards and ReadDialogData functions, but this is getting weirder:

After the first two replace commands, I did a Msgbox ccdata(1).fname etc, and by the time it hit TransAmt, it was garbage in my Msgbox ccData(1).TransAmt, which is bizarre, something is corrupting memory.

'------------------------------------------------------------------------------
Function WriteOutPutFile(ccData() As XmitData) As Long
Local F As Long
Local G As Long
Local x As Long

Local a  As String
Local c  As String
Local e  As String
Local n  As String
Local r  As String
Local St As String

a = "%a"
c = "%c"
e = "%e"
n = "%n"
r = "%r"

G = FreeFile
Open OutFile For Output As #G
F = FreeFile
Open Template For Input As #F

If IsTrue Exist(Template) Then
    Do Until Eof(F)
       Line Input #F,St
       If Len(St) < 2 Then Iterate '%a needs two characters
       Replace Any n With ccData(1).fName In St
       Replace Any c With ccData(1).CardNo In St     'ccData.everything is string
       Replace Any a With ccData(1).TransAmt In St
       Replace Any e With ccData(1).ExpDate In St
       Replace Any r With ccData(1).Reference In St
       Print #G, St
    Loop
Else
    For x = 1 To wCount
        Print #G, TimeStamp + ":"
        Print #G,ccData(1).fName
        Print #G,ccData(1).CardNo
        Print #G,ccData(1).ExpDate
        Print #G,ccData(1).TransAmt
        Print #G,ccData(1).Reference
        Print #G, String$(48,"-")
    Next
End If
Close F,G
End Function

[This message has been edited by Scott Turchin (edited January 28, 2000).]

**Scott Turchin** · 28 Jan 2000, 11:03 PM

If you Compile this and it does not GPF on anyone elses system then my OS is hosed (??)

Code:

#Dim All
#Compile Exe
#Option Version4
#Register None

Type XmitData
     fName      As Asciiz * 60
     CardNo     As Asciiz * 17
     ExpDate    As Asciiz * 5
     TransAmt   As Asciiz * 8        'In Pennies
     Reference  As Asciiz * 255
End Type
Global ccData() As XmitData

Function PbMain() As Long
Dim ccData(1 To 100) As XmitData
Local a  As String
Local c  As String
Local e  As String
Local n  As String
Local r  As String
Local St As String

a = "%a"
c = "%c"
e = "%e"
n = "%n"
r = "%r"
ccData(1).fName = "John M. Doe"
ccData(1).CardNo = "000000000000000"
ccData(1).TransAmt = "100"
ccData(1).ExpDate = "0901"
ccData(1).Reference = "General Purchase"

St = a + $CRLF + c + $CRLF + e + $CRLF + n + $CRLF + r
MsgBox St
Replace Any n With ccData(1).fName In St
Replace Any c With ccData(1).CardNo In St     'ccData.everything is asciiz
Replace Any a With ccData(1).TransAmt In St
Replace Any e With ccData(1).ExpDate In St
Replace Any r With ccData(1).Reference In St
       
End Function

-------------
Scott Turchin

**Semen Matusovski** · 28 Jan 2000, 11:39 PM

Scott --
you should cancel ANY in REPLACE command. This variant works even with additional difficultes (some n inside St).

Code:

#Dim All
#Compile Exe
#Option Version4
#Register None

Type XmitData
     fName      As Asciiz * 60
     CardNo     As Asciiz * 17
     ExpDate    As Asciiz * 5
     TransAmt   As Asciiz * 8        'In Pennies
     Reference  As Asciiz * 255
End Type
Global ccData() As XmitData

Function PbMain() As Long
Dim ccData(1 To 100) As XmitData
Local a  As String
Local c  As String
Local e  As String
Local n  As String
Local r  As String
Local St As String

a = "%a"
c = "%c"
e = "%e"
n = "%n"
r = "%r"
ccData(1).fName = "John M. Doe"
ccData(1).CardNo = "000000000000000"
ccData(1).TransAmt = "100"
ccData(1).ExpDate = "0901"
ccData(1).Reference = "General Purchase"

St = a + $CRLF + n + c + n + $CRLF + e + $CRLF + n + $CRLF + r
Replace n With ccData(1).fName In St
Replace c With ccData(1).CardNo In St     'ccData.everything is asciiz
Replace a With ccData(1).TransAmt In St
Replace e With ccData(1).ExpDate In St
Replace r With ccData(1).Reference In St
MsgBox St

End Function

What is strange - what compiler do ? Why doesn't select minimum length between MatchString & NewString ?
Semantic mistake should not be a reason of GPF.

[This message has been edited by Semen Matusovski (edited January 29, 2000).]

**Gafny Jacob** · 29 Jan 2000, 01:55 AM

You can use REPLACE ANY Only if The New string is the same length
as the string you are replacing.

If you want multiple replacement of differnet length string then use

WHILE INSTR (St(x), n)
Replace n With ccData(x).fName In St(x)
WEND

**Semen Matusovski** · 29 Jan 2000, 02:24 AM

Jacob --
Replace without ANY and with ANY perform different actions.

REPLACE without ANY replaces ALL (!) occurrences of MatchString in
MainString with NewString.
So, it's not necessary to do WHILE INSTR (St(x), n).. WEND

"If you use the ANY option, within MainString, each occurrence of each
character in MatchString will be replaced with the corresponding character
in NewString."
Means following: If you want to change ALL letters "a" with "x", "b"
with "y", "c" with "z", you should use REPLACE ANY "abc" WITH "xyz" IN A$

Sample:
a$ = "bacdcab"
Replace "abc" With "xyz" In a$ ' <---- No effect , because there are no substrings "abc"
MsgBox a$
Replace Any "abc" With "xyz" In a$ ' <- result is yxzdzxy
MsgBox a$

[This message has been edited by Semen Matusovski (edited January 29, 2000).]

**Borje Hagsten** · 29 Jan 2000, 08:24 AM

Just a tip for better performance. You do a lot of printing, but why
not build up a string buffer and print that one just once instead?
It's much faster and more reliable. Example:

Code:

  Local Buf As String
  Do Until Eof(F)
    Incr x
    Line Input #F,St(x)
    Replace c With ccData(x).CardNo    In St(x) 'ccData.everything is string
    Replace a With ccData(x).TransAmt  In St(x)
    Replace e With ccData(x).ExpDate   In St(x)
    Replace n With ccData(x).fName     In St(x)
    Replace r With ccData(x).Reference In St(x)
    Buf = Buf & St(x) & Chr$(13, 10)            'need a CRLF here
  Loop
  Print #G, Buf

**Semen Matusovski** · 29 Jan 2000, 10:17 AM

Borje --
if to speak about performance and string buffer, it's necessary to remember that such statements as a$ = a$ + b$, where a$ is a string with variable length, work very bad since a moment, when a$ becomes enough large. To test this try following:

Code:

#Compile Exe
#Register None
DefInt A-z

Function PbMain() As Long

a$ = Space$(82& * 100000)
b$ = Space$(80) + $CRLF
t1# = Timer
For i = 1 To 100000
   Mid$(a$, i * 82 - 81, 82) = b$
Next
t2# = Timer
MsgBox Str$(t2# - t1#)
a$ = ""
t1# = Timer
For i = 1 To 10000
   a$ = a$ + b$
Next
t2# = Timer
MsgBox Str$(t2#-t1#)

End Function

You will see a difference, even when 100000 to 10000. Then try to increase number of iterations for variant 2.

My whatches shows that increasing a buffer after 4-8kb has no effect.
So, in my oppinion, better to insert in your code some additional statements:

Code:

  Local Buf As String
  Do Until Eof(F)
    Incr x
    Line Input #F,St(x)
    Replace c With ccData(x).CardNo In St(x) 'ccData.everything is 
    ...
    Buf = Buf & St(x) & Chr$(13, 10)
    If Len(Buf) > 4096 Then Print #G, Buf;: Buf = ""
 Loop
 Print #G, Buf

**Borje Hagsten** · 29 Jan 2000, 12:14 PM

You are right, Semen. I actually do this myself, when I save the language
databases I use in my translator to disk. I found that setting the limit
to around 32,000 bytes gave the best performace in a lopp that writes to a
HD, and then I use the first of your examples there, by filling up already
allocated string space with MID$().

It's very effective - saving 100,000 items takes less than a second..

**Scott Turchin** · 29 Jan 2000, 12:31 PM

OK So while that discussion is going on, can anyone produce the original GPF with this code, I'll give you a hint, it will process 2 Replace commands and will die on the 3rd

Code:

#Dim All
#Compile Exe
#Option Version4
#Register None
#Include "win32api.inc"

Type XmitData
     fName      As String * 35
     CardNo     As String * 17
     ExpDate    As String * 5
     TransAmt   As String * 8        'In Pennies
     Reference  As String * 255
End Type
Global ccData() As XmitData

Function PbMain() As Long
Dim ccData(1 To 100) As XmitData
Local a  As String
Local c  As String
Local e  As String
Local n  As String
Local r  As String
Local St As String

a = "@@a"
c = "@@c"
e = "@@e"
n = "@@n"
r = "@@r"
ccData(1).fName = "John M. Doe"
ccData(1).CardNo = "000000000000000"
ccData(1).TransAmt = "100"
ccData(1).ExpDate = "0901"
ccData(1).Reference = "General Purchase"

St = a + $CRLF + c + $CRLF + e + $CRLF + n + $CRLF + r + Chr$(0)

MsgBox St, %MB_ICONINFORMATION, "Test one"
'Replace Any "@@n" With ccData(1).fName In St
Replace Any "@@c" With ccData(1).CardNo In St     'ccData.everything is asciiz
Replace Any "@@a" With ccData(1).TransAmt In St
Replace Any "@@e" With ccData(1).ExpDate In St
'Replace Any "@@r" With ccData(1).Reference In St
MsgBox St, %MB_ICONINFORMATION, "Test two"

End Function

-------------
Scott Turchin

**Eric Pearson** · 29 Jan 2000, 02:18 PM

Scott -

As Gafny pointed out, when you use REPLACE ANY the search and replace strings must be
the same length. Using the ANY option specifies a character-for-character replacement.

So when you do this…

Code:

ccData(1).CardNo = "000000000000000"
Replace Any "@@c" With ccData(1).CardNo In St

...you are violating that rule because "@@c" is not the same length as "000000000000000".
I am not surprised that this produces a GPF. Not only that, but you are effectively
saying "replace @ with the first character of .CardNo, then replace "@" with the second character
of .CardNo, and then replace c with the third character of .CardNo" and I strongly suspect
that that's not what you intended to do.

Get rid of the ANY and I predict that the GPF will disappear.

-- Eric

-------------
Perfect Sync: Perfect Sync Development Tools
Email: mailto:[email protected][email protected]</A>

[This message has been edited by Eric Pearson (edited January 29, 2000).]

**Scott Turchin** · 29 Jan 2000, 02:32 PM

That was it, OK Sorry for the misunderstanding

Cool, it's rther nice because it allows me to replace the %n with a username and write a web page based on a template ...

Cool! One more huge bug and this app is done!

Thanks!!

Scott

-------------
Scott Turchin

**Semen Matusovski** · 29 Jan 2000, 02:45 PM

Guys --
I think that not GPF could be a thread for further discussion - here all is clear.
Scott, as I understand, wanted to replaces "all occurrences of MatchString in MainString with NewString", but not "character-to-character". He used REPLACE ANY, because thought that exactly REPLACE ANY performs needed replacement.
If to read documentation, it's very easy to understand, why Scott made a logical mistake and Jacob offered to use While Instr ...: Wend.
I was able to understand, what exactly perform these statements after testing only.

Another moment - why compiler generate GPF instead of - for example - run-time ON ERROR-situation ?

**Lance Edmonds** · 31 Jan 2000, 06:07 AM

Simple. The programmer is responsible to ensure that these type of errors do not occur. The compiler simply cannot catch every possible error, especially when using pointers.

-------------
Lance
PowerBASIC Support
mailto:[email protected][email protected]</A>

Announcement

Replace command

Replace command

Comment

Comment

Comment

Comment

Comment

Comment

Comment

Comment

Comment

Comment

Comment

Comment

Comment

Comment