Re: [Flightgear-devel] Re: AI weirdness
On Monday 02 May 2005 21:23, Melchior FRANZ wrote: * Durk Talsma -- Monday 02 May 2005 21:16: I don't know what point you're trying to make: either that there is such a big discrepancy between the number of files that are checked for their precence, and the fact that there are currently none in CVS, Well, checking for 5 files when we can probably only expect a few hundreds in the next ten years seems like a waste of performance. No big problem on Linux with normal file systems (apart from the needless noise in debugging runs). But I wouldn't be surprised if this is a problem on other operating systems, like Win95. (Or NFS?) I thought the alternative approach would be obvious. Instead of checking for the existence of 5 possible files just ask the system for actual files? Okay, thanks for clarifying. I see what you mean. I'll put this on my TODO list. Might take a few weeks though before I'm fully back to working on this. Cheers, Durk ___ Flightgear-devel mailing list Flightgear-devel@flightgear.org http://mail.flightgear.org/mailman/listinfo/flightgear-devel 2f585eeea02e2c79d7b1d8c4963bae2d
Re: [Flightgear-devel] Re: AI weirdness
Melchior FRANZ wrote : * Durk Talsma -- Monday 02 May 2005 21:16: I don't know what point you're trying to make: either that there is such a big discrepancy between the number of files that are checked for their precence, and the fact that there are currently none in CVS, Well, checking for 5 files when we can probably only expect a few hundreds in the next ten years seems like a waste of performance. No big problem on Linux with normal file systems (apart from the needless noise in debugging runs). But I wouldn't be surprised if this is a problem on other operating systems, like Win95. (Or NFS?) I thought the alternative approach would be obvious. Instead of checking for the existence of 5 possible files just ask the system for actual files? I didn't see a problem yet, but if we can avoid a long startup time, it is better. Let me rephrase Melchior's suggestion : iterate on directories with plib's ulOpenDir and ulReadDir functions, possibly being recursive in the tree, and check if the name of the reported files are an existing ICAO code against the database already loaded in memory. Examples of directory scan are in fgadmin and in fgrun. -Fred ___ Flightgear-devel mailing list Flightgear-devel@flightgear.org http://mail.flightgear.org/mailman/listinfo/flightgear-devel 2f585eeea02e2c79d7b1d8c4963bae2d
Re: [Flightgear-devel] Re: AI weirdness
On Monday 02 May 2005 21:43, Frederic Bouvier wrote: Let me rephrase Melchior's suggestion : iterate on directories with plib's ulOpenDir and ulReadDir functions, possibly being recursive in the tree, and check if the name of the reported files are an existing ICAO code against the database already loaded in memory. Examples of directory scan are in fgadmin and in fgrun. -Fred Okay, that would be fairly easy to do. I'll have a look. Cheers, Durk ___ Flightgear-devel mailing list Flightgear-devel@flightgear.org http://mail.flightgear.org/mailman/listinfo/flightgear-devel 2f585eeea02e2c79d7b1d8c4963bae2d
