[Dcmlib] DebugMacro vs WarningMacro

[Mathieu Malaterre]

Jean-Pierre Roux wrote:
> Hi, everybody .
> 
> Some times ago I read (well. ..  I saw) some commit explaining we don't 
> have to mixture DebugMacro and WarningMacro.
> 
> I don't remember what was the purpose, but I'm not sure messages such as :
> "Last system error was: Success".
> was expected.
> 
> Anyway, have we got really 'Warning' messages to ouput to the 'normal' 
> user?
> Almost all I can find are informations we give the developper, to inform 
> him how the process is running.
> 
> Any opinion?

My goal is that Debug is for Debug, for developer. The Warning mechanism 
is right now identical to Debug (output to the same stream as Debug). 
But I would like later to generate output like dciodvfy, therefore I 
*need* to differenciate what a debug comment is from a warning 'we 
process this DICOM file only because we are smart enough'.

Basically the gdcmWarningMacro could output to std::log or a specific 
file if we ever write a 'dciodvfy' like.

BTW when debugging with bcc5.5, I found extremely usefull to have 
strerror() displayed. Therefore when gdcm start failing and I read that 
the file was not open properly (file permissions...) I don't have to 
waste my time. So yes I would like to keep this in DebugMacro.

2 cents,
Mathieu