[fixed] Efficiently iterate over FS using getFileSystem

[Cube_]

So I've been playing around with safeguarding my code (because if a file doesn't exist irrlicht crashes instead of handling it gracefully) and I figured; while I'm at it I might as well also figure out an efficient way to read files from FS; currently I just load a string list from a hardcoded config file and parse files one by one; this is obviously stupid but it works, eh?

anyway, since irrlicht has quite a few filesystem tools it presumably also has the ability to run the equivalent of ls and getting a file list, no?
Well, in any case - I tried my best at replicating such functionality in any meaningful way (I need to get a list of files so I can load them, and I don't know the file names at compile time)

If so, currently I just load strings from xml (this is not extensible) and then for each path I do this (minimal example with hardcoded path):

Code: Select all

 
std::string fpath = "data/models/levels/alphamap.obj";
io::IFileSystem* FileSystem = device->getFileSystem();
if (FileSystem->existFile(fpath.c_str()))
{
    IAnimatedMesh* levelMesh = smgr->getMesh(fpath.c_str());
    IMeshSceneNode* level = smgr->addMeshSceneNode(levelMesh);
    if (level)
    {
        level->setMaterialFlag(EMF_LIGHTING, false);
        level->setPosition(level->getPosition() + vector3df(0.0f, 0.0f, 50.0f));
    }
    else
    {
        level->drop();
        level = smgr->addCubeSceneNode(10.0f, 0, -1);
        level->setMaterialFlag(EMF_LIGHTING, false);
        level->setPosition(level->getPosition() + vector3df(0.0f, 0.0f, 50.0f));
    }
}

I tried using the following to iterate over the filesystem to find all .obj files (I have 10 of them for testing purposes)

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    io::IFileSystem* fs = Game->device->getFileSystem();
    fs->changeWorkingDirectoryTo("Data/");
    IFileList *fileList = fs->createFileList();
    fs->setFileListSystem(FILESYSTEM_NATIVE);
    for (int i = 0; i < fileList->getFileCount(); ++i)
    {
        s = fileList->getFullFileName(i);
        if (s.find(".obj") >= 0)
        {
            printf("path: %s\n", s);
        }
    }

Now; this sorta works - I get output.

but all lines are just "path: c" and I'm definitely certain none of the obj. files are named "c"; this implies that I misunderstand how to use that. s is defined as a core::stringw type, if that matters.
So the question is; what exactly am I doing wrong?
Worth noting is: I get exactly 10 lines out, so it is finding 10 obj files.

[Cube_]

Updated; managed to fix it - although it's technically an unsafe operation since it's an unsafe cast from core::stringw to wchar_t*

Code: Select all

    io::IFileSystem* fs = Game->device->getFileSystem();
    fs->changeWorkingDirectoryTo("Data/");
    IFileList *fileList = fs->createFileList();
    fs->setFileListSystem(FILESYSTEM_NATIVE);
    for (int i = 0; i < fileList->getFileCount(); ++i)
    {
        s = fileList->getFullFileName(i);
        if (s.find(".obj") >= 0)
        {
            wprintf(L"path: %s\n", s); 
        }
    }

[CuteAlien]

You can use .c_str() to get a wchar_t* from a core::stringw

[Cube_]

You can use .c_str() to get a wchar_t* from a core::stringw

yeah, I didn't even think of that - I've been going for... 18 hours now? I'm mostly done implementing all my file serialization code (including correctly determining endianness and serializing to network order (big endian)), most of my rendering and loading code, some level paging code - on a roll; I would probably have rememberd c_str() eventually since I use it everywhere else.