[Mysqlcppapi-forge] [ mysqlcppapi-Bugs-882718 ] fields/FieldType.cc variable used before initialisation

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Bugs item #882718, was opened at 2004-01-23 05:55
Message generated for change (Settings changed) made by redi
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Category: None
Group: None
Status: Open
Resolution: None
Priority: 5
Submitted By: Nobody/Anonymous (nobody)
>Assigned to: Jonathan Wakely (redi)
Summary: fields/FieldType.cc variable used before initialisation

Initial Comment:
In the constructors of FieldType the "m_uiMaxLength=0" 
should be put at the start of the constructors because 
setType subsequently needs to use it.

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Comment By: Jonathan Wakely (redi)
Date: 2004-01-25 02:18

Message:
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Yes, you're right, thanks for reporting it.
The class looks broken to me, since it calls the virtual
get_MaxLength and set_MaxLength functions from the base
ctor, which is usually a bad idea. Because the derived
object is not constructed yet, only the base class versions
are called, which uses an uninitialised variable.
I think the comment in FieldType.cc about the ctor having
too many args should be ignored and the max length and
decimal count should be passed to the ctor if known
(defaulting to zero).
I'll look into it properly A.S.A.P and at least fix the
uninitialised variables, but fixing it properly might
require a bigger change.


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