Hi, > I've read some of the source code, but I have one question for the > more experienced hackers: during the apply of a patch, darcs load the > whole file in memory and then writes it back, or it uses smart > "offset" tricks to read and write only specific parts of the file?
I haven't had a very deep look, so this is my best guess: the former. I say this because hunk modifications end up calling Darcs.Patch.Apply.applyFL, which calls Darcs.IO.WriteableDirectory.modifyFilePS, which by default, is implemented by reading the file in as a PackedString, doing something to it and writing it back out. I don't notice any other implementation overriding this default behaviour (grep -r mModifyFilePS src), so I conclude that it must always work that way. Hope that helps, -- Eric Kow http://www.loria.fr/~kow PGP Key ID: 08AC04F9 Merci de corriger mon français.
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