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Report From: Delphi-BCB/RTL/Delphi/Format + Float [ Add a report in this area ]

Report #: 101552

Status: Closed

[REGRESSION in XE2] Format function doesn't handle #0 characters

Project: Delphi

Build #: 16.0.4316.44803

Version: 16.2

Submitted By: Stephen Millington

Report Type: Basic functionality failure

Date Reported: 12/5/2011 4:07:09 AM

Severity: Serious / Highly visible problem

Last Updated: 12/19/2012 8:01:04 PM

Platform: All versions

Internal Tracking #: 289067

Resolution: Fixed (Resolution Comments)

Resolved in Build: : Update 4

Duplicate of: None

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Description

After upgrading from Delphi 2007 to Delphi XE2 I have found that when using the Format function with %s then if the string contains #0 characters, only the characters up to the first #0 are returned. Delphi 2007 returned all the characters.

Added by Sysop
<<<<<<
ShowMessage(IntToStr(Length(str2)));
In Delphi 6, ... XE, it outputs 17.
But in Delphi XE2, it outputs 10.
Please see [Steps] for more details.
>>>>>>

Steps to Reproduce:

var
  str, str2: string;
  i: integer;
begin
  i := 10;
  str := 'hello' + #0 + ' world';
  str2 := format('%d - %s', [i, str]);
  ShowMessage(IntToStr(Length(str2)));
end;

In Delphi 2007/XE it outputs 17, but in Delphi XE2 it outputs 10.

Workarounds

instead of using the Format function do str2 := IntToStr(i) + ' - ' + str;

Attachment

None

Comments

Stephen Millington at 12/5/2011 8:31:49 AM -

It is not the Length function that is at fault, it is the Format function. I just included the call to the Length function to demonstrate the problem but if you look at the local variables window in the IDE for str2 after putting a breakpoint after the Format line you can see it has been truncated at the #0.

Tomohiro Takahashi at 12/5/2011 5:16:32 PM -

Thanks for the information.
I will check this issue with Delphi 6, 2007, 2009, 2010, XE, XE2...

Tomohiro Takahashi at 12/5/2011 5:51:36 PM -

Delphi 6, ... XE return 17 correctly.

Tomohiro Takahashi at 1/4/2012 10:56:18 PM -

We hope this issue will be fixed in next update release(e.g., Update 4).
Please stay tuned.

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