hi, On Tue, Apr 29, 2008 at 06:33:44AM -0700, Matthew Welland wrote: > I'm using file-open and file-read and various blob to vector conversions to > read and parse binary files. Does anyone have any general suggestions or > guidelines for doing this efficiently? One possibility that occured to me > is to read large chunks into a blob and then process rather than reading > small chunks as needed. I'll probably give this a try but I'm hoping to > save exploring dead ends by tapping the wisdom of this group.
if your data can be represented as c-structs you could read it in some malloc()ed memory block and then use accessors defined with define-foreign-record. or on unix you could mmap() it and then use define-foreign-record accessors. but this only works if the file really is laid out like a c struct (and thus is not very platform independent). i like peter seibel's binary file library in practical common lisp[1], i always wanted to write something like that for chicken, but didn't do it so far :( hth&bye, hans. [1] http://www.gigamonkeys.com/book/practical-parsing-binary-files.html _______________________________________________ Chicken-users mailing list [email protected] http://lists.nongnu.org/mailman/listinfo/chicken-users
