[vtkusers] file handling

[Sean McInerney]

// methinks this'll work:

#include <stdlib.h>
#include <string.h>

char*       dataRoot = getenv("VTK_DATA_ROOT");
const char* fileName = "/Data/masonry.bmp";
char*       pathName = new char [strlen(dataRoot)+strlen(fileName)+1);

strcpy(pathName, dataRoot);
strcat(pathName, fileName);

// Voila!!! ... don't forget to call delete[] on pathName!!!

David Cole wrote:
>>
>> How would you write the line
>> reader SetFileName "$VTK_DATA_ROOT/Data/masonry.bmp"
>>
>> in C++?
> 
> 
> $VTK_DATA_ROOT represents the environment variable named VTK_DATA_ROOT. 
> It should be replaced with the location of the VTKData folder on your 
> system...
> 
> A search of the current CVS VTK C++ source files for VTK_DATA_ROOT 
> yields hits in the source file VTK/Rendering/vtkTesting.cxx. See that 
> file for an example usage of getenv to extract the value of VTK_DATA_ROOT.
> 
> 
> Hope this helps,
> David
>