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Old 04-18-2010, 02:24 PM   #1
golmschenk
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C - How to put a specific arbitrary part of a string into it's own string?


So if I'm given a location of a file like:
/something/somethingelse/thefile.html or
/different/moredifferent/otherfile.jpg
How can I just take the type of the file at the end? I know I can use strrchr() for a period to get the pointer to the period just before file type. Is there a build in string function that will just take the rest of the string from a certain point on forward in the string? I know it wouldn't be much work to make it myself, but I figured I would find out if it already existed before doing it.

Thanks!
 
Old 04-18-2010, 02:51 PM   #2
troop
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too simpe for the special function
Code:
char str[]="/something/somethingelse/thefile.html";
char str_ext[10];
strcpy(str_ext,((char*)strrchr(str,'.'))+1);
 
Old 04-18-2010, 03:26 PM   #3
golmschenk
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Great great, thanks thanks.
 
Old 04-18-2010, 03:32 PM   #4
jiml8
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and how well will that scheme work if char str[]="/some.thing/some.thing.else/thefile.html"; ?

Best way it to use pointers and scan backward through the string to find the last period in it.
 
Old 04-18-2010, 03:56 PM   #5
troop
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Quote:
Originally Posted by jiml8 View Post
and how well will that scheme work if char str[]="/some.thing/some.thing.else/thefile.html"; ?
that scheme work very well. output: html
Quote:
Best way it to use pointers and scan backward through the string to find the last period in it.
strrchr!=strchr

Last edited by troop; 04-18-2010 at 03:58 PM.
 
Old 04-18-2010, 07:36 PM   #6
jiml8
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Oops. I missed the extra "r" in the middle of the function.
 
Old 04-18-2010, 08:28 PM   #7
grail
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OP - if you have your solution, please mark query as SOLVED.
 
Old 04-19-2010, 11:12 AM   #8
golmschenk
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Oops, sorry about not marking solved. I usually remember that.
 
Old 04-19-2010, 12:05 PM   #9
dmail
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Quote:
Originally Posted by grail View Post
OP - if you have your solution, please mark query as SOLVED.
Is it solved?

"/foo/.baz"
"./foo"
"/foo.causeBufferOverFlow"

Marking threads as solved is wrong, especially since the person who marks it as such does not have the knowledge to know if there are problems. I will purposely leave this as an exercise.

Last edited by dmail; 04-19-2010 at 12:09 PM.
 
Old 04-19-2010, 09:27 PM   #10
grail
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Whilst i understand your point dmail, I also cannot tell if the OP understands that the solution is not final but may need
some more work just as it may be all they need to solve this particular issue.

But as OPs last post was:
Quote:
Great great, thanks thanks.
I just took it that they probably were not going to revisit this query as they seemed to be satisfied.
 
  


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