Messages in this thread | | | Date | Thu, 14 Sep 2023 21:37:07 +0300 | From | Andy Shevchenko <> | Subject | Re: [PATCH v1 1/1] lib/string_helpers: Don't copy a tail in kstrdup_and_replace() if 'new' is \0 |
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On Wed, Sep 13, 2023 at 12:45:57PM +0300, Andy Shevchenko wrote: > The kstrdup_and_replace() takes two characters, old and new, to replace > former with latter after the copying of the original string. But in case > when new is a NUL, there is no point to copy the rest of the string, > the contract with the callers is that that the function returns a > NUL-terminated string and not a buffer of the size filled with a given > data. With this we can optimize the memory consumption by copying only > meaningful part of the original string and drop the rest.
Thinking about this more, I self NAK this. If the caller knows the size of the original message it can be handy to make a copy and replace all occurrences of old by NUL. This will be an optimized implementation of strsep(str, "$OLD").
-- With Best Regards, Andy Shevchenko
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