Hi Robert,
Hiding the standard functions and classes with our own fopen and
fstream/ifstream/ofstream does seem the ideal option.
Hiding fopen in the osg and osgDB namespaces is trivial.
However, hiding fstream/ifstream/ofstream is not so easy as they are in
the std namespace.
This works:
//header file osg/fstream
#include <fstream>
namespace osg{
namespace std{
using namespace ::std;
class fstream : public ::std::fstream{...};
}}
//cpp file
#include <osg/fstream>
namespace osg{
void someFunc(){
std::fstream f;//constructs an osg::std::fstream
}}
However, most OpenSceneGraph CPP files contain the following line:
using namespace osg;
Consequently all subsequent references to the std namespace are
ambiguous and won't compile.
Personally I think "using namespace osg" is incorrect, and should be
replaced with "namespace osg{" but that's a separate issue.
In conclusion, yes we should have osg::fopen(). We could have
osg::fstream, which would look a bit neater, but won't prevent
accidental use of std::fstream.
-----Original Message-----
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED]
<mailto:[EMAIL PROTECTED]> ] On Behalf Of
Robert Osfield
Sent: 07 October 2008 21:14
To: OpenSceneGraph Users
Subject: Re: [osg-users] Unicode support for Windows
Off the top of my head my first suggestions, perhaps naive, would be to
have a osgDB::ifstream and osgDB::ofstream implementations that take
std::string (or alternatively) as parameters for the constructors and
open() and hide the traditional methods, and have these subclasses do
the internal conversions required. An osgDB::fopen() could also be
written.
Thoughts?
Robert.
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