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Re: Reading in dictionary from txt file: options for speed
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Re: Reading in dictionary from txt file: options for speed


  • Subject: Re: Reading in dictionary from txt file: options for speed
  • From: Marcel Weiher <email@hidden>
  • Date: Thu, 16 Apr 2009 19:52:17 -0700


On Apr 16, 2009, at 18:59 , Michael Ash wrote:

On Thu, Apr 16, 2009 at 2:47 PM, WT <email@hidden> wrote:
since he'll be dealing with the string's raw bytes, won't Miles have to
manually add a null byte to terminate the search string?

The strnstr() function takes a length, and can thus be safely used on buffers which contain no NUL byte.

As far as I can tell it only takes one length, and that's for the string to be searched, so he will have to NULL-terminate the search string (which is what WT was talking about as far as I can tell). Well that would be the case if strnstr() were actually useful for him, which I guess it isn't.


On Tiger and earlier, strnstr() had a bug where it could read one byte
past the length specified, which could cause a crash in certain
circumstances. Had a grand old time tracking that one down, I did. It
was eventually fixed in a security update, and I believe it was fixed
in Leopard from the start.

Funky stuff!

Marcel

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  • Follow-Ups:
    • Re: Reading in dictionary from txt file: options for speed
      • From: Michael Ash <email@hidden>
References: 
 >Reading in dictionary from txt file: options for speed (From: Miles <email@hidden>)
 >Re: Reading in dictionary from txt file: options for speed (From: Marcel Weiher <email@hidden>)
 >Re: Reading in dictionary from txt file: options for speed (From: WT <email@hidden>)
 >Re: Reading in dictionary from txt file: options for speed (From: Miles <email@hidden>)
 >Re: Reading in dictionary from txt file: options for speed (From: Marcel Weiher <email@hidden>)
 >Re: Reading in dictionary from txt file: options for speed (From: WT <email@hidden>)
 >Re: Reading in dictionary from txt file: options for speed (From: Michael Ash <email@hidden>)

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