0021899: Tregistry access of bluetooth comm ports drops last char

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Date Submitted

Last Update

0021899

FPC

Compiler

public

2012-04-30 20:01

2012-05-04 03:16

Reporter

mas

Assigned To

Priority

normal

Severity

tweak

Reproducibility

always

Status

new

Resolution

open

Platform

desktop and laptop

windows

OS Version

XP & Win 7

Product Version

2.4.4

Product Build

32559

Target Version

Fixed in Version

Summary

0021899: Tregistry access of bluetooth comm ports drops last char

Description

when accessing window's comm port registry the ReadString() works normally for USB and real hardware but drops the last character for any Bluetooth comm ports. the error is with Windows but a fix is needed anyway.

either the striping of the last char is fixed to check before striping or an override flag is needed in the Tregistry so the trailing Null is not striped.

Steps To Reproduce

add a Bluetooth comm port (hardware needed?). see windows fail.
or add a simulated entry elsewhere and access with TRegistry

binary view of working entry
"COM10" = [43,00,4f,00,4d,00,31,00,30,00,00,00]

binary view of bluetooth entry
"COM58" = [43,00,4f,00,4d,00,35,00,38,00]

Additional Information

   reg.RootKey := HKEY_LOCAL_MACHINE;
    reg.OpenKeyReadOnly('HARDWARE\DEVICEMAP\SERIALCOMM');//, false);
    reg.GetValueNames(l);
    for n := 0 to l.Count - 1 do begin
// reg.StringSizeIncludesNulls := FALSE; // if I had set access to this..
      v.Add(reg.ReadString(l[n]));
    end;
    Result := v.CommaText;

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FPCOldBugId

Fixed in Revision

Attached Files

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Notes
(0059135) mas (reporter) 2012-04-30 20:06	I included some more data but I do not see it here. flaw in reporting website or is it only accessable by the repairman?

(0059227) mas (reporter) 2012-05-04 03:16 edited on: 2012-05-04 03:16	I verified that setting StringSizeIncludesNull := FALSE just before the call does GET the full string. (kluge) adding the strings with the extra null to tstring does not hurt anything (my access). If I fix this issure correctly, do I/can I upload a modified registry file from 2.4.4 ??

Issue History
Date Modified	Username	Field	Change
2012-04-30 20:01	mas	New Issue
2012-04-30 20:06	mas	Note Added: 0059135
2012-05-04 03:16	mas	Note Added: 0059227
2012-05-04 03:16	mas	Note Edited: 0059227

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Open source compiler for Pascal and Object Pascal