Model parsing is locale dependent

[jmichel]

the ossimString::toDouble() method calls atof(), which depends on the current locale.

As a result, model parsing fails when using LANG="fr_FR.UTF-8" (defines floating point seperator as ',' instead of '.'), and no application based on ossim can be internationalised.

I would suggest using this trick : ​http://stackoverflow.com/questions/1333451/c-locale-independent-atof to implement a local independent ToDouble() method in ossimString. A useLocale flag could be used to preserve the other behaviour (though the locale independent one should be used in order to get most sensor models right without patching everywhere).

[gpotts]

We have adjusted the algorithm to use istringstream in the conversion. We still need to test on mingw for conversion for there is a comment about thread safety when using this approach.

[jmalik]

Garrett,

Just saw your patch. From the reading of stackoverflow question, the advantage of using istringstream is that you can "imbue" the stream (to force a C locale for example). I guess the code as it is now is equivalent to the previous "atof" implementation, that is, it uses the system locale.

To read data from ascii metadata in products, I guess we need to force "C" numeric locale. Also, when reading/writing ossim keywordlist, what's the intended behavior. Probably also to use "C" numeric locale.