Can we do regular expression processing in C ?

[Mahendra Kutare]

Or do we need to have any specific library ?

I am more interested in knowing if we can do string pattern matching
regular expression processing with C.

Thanks
Mahendra

[Ian Collins]

Mahendra Kutare wrote:

Or do we need to have any specific library ?

I am more interested in knowing if we can do string pattern matching
regular expression processing with C.

Not in standard C, there are plenty of extensions (POSIX regex for example).

--
Ian Collins.

[Don Bruder]

In article <65*************@mid.individual.net>,
Ian Collins <ia******@hotmail.comwrote:

Mahendra Kutare wrote:

Or do we need to have any specific library ?

I am more interested in knowing if we can do string pattern matching
regular expression processing with C.

Not in standard C, there are plenty of extensions (POSIX regex for example).

And I betcha that was written in ... wait for it ... C!

Yes, you can indeed do regular expression processing in C. Even in
absolutely 100% standard C.

You can do *DAMN NEAR ANYTHING* in standard C. (Even *THAT*? Get your
mind out of the gutter! I said "damn near"! :) )

You just have to be willing (and able) to write the code to do it if you
don't have (or for some reason don't want to/aren't allowed to use) a
library routine that already does it for you.

Fortunately, at this stage in the game there are many excellent
libraries available out there that do many useful things, and they are
perfectly compatible with standard C (and quite possibly written in
standard C) even if they aren't specced by the C standard as being
officially part of the language. Not being required by the standard
doesn't make them any less "standard C".

--
Don Bruder - da****@sonic.net - If your "From:" address isn't on my whitelist,
or the subject of the message doesn't contain the exact text "PopperAndShadow"
somewhere, any message sent to this address will go in the garbage without my
ever knowing it arrived. Sorry... <http://www.sonic.net/~dakiddfor more info

[Ian Collins]

Don Bruder wrote:

In article <65*************@mid.individual.net>,
Ian Collins <ia******@hotmail.comwrote:

>Mahendra Kutare wrote:

>>Or do we need to have any specific library ?

I am more interested in knowing if we can do string pattern matching
regular expression processing with C.

Not in standard C, there are plenty of extensions (POSIX regex for example).

Not being required by the standard doesn't make them any less "standard C".

OK, to disambiguate my reply further, regular expressions are not part
of the standard library.

--
Ian Collins.

[Jack Klein]

On Wed, 02 Apr 2008 15:36:41 +1300, Ian Collins <ia******@hotmail.com>
wrote in comp.lang.c:

Mahendra Kutare wrote:

Or do we need to have any specific library ?

I am more interested in knowing if we can do string pattern matching
regular expression processing with C.

Not in standard C, there are plenty of extensions (POSIX regex for example).

I disagree, one most certainly can.

There are no functions for doing this in the standard library, so one
would have to either write them, or find a library that already
contained them. But such a library could be written in strictly
conforming C, at least for the ASCII character set.

--
Jack Klein
Home: http://JK-Technology.Com
FAQs for
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alt.comp.lang.learn.c-c++
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[Ian Collins]

Jack Klein wrote:

On Wed, 02 Apr 2008 15:36:41 +1300, Ian Collins <ia******@hotmail.com>
wrote in comp.lang.c:

>Mahendra Kutare wrote:

>>Or do we need to have any specific library ?

I am more interested in knowing if we can do string pattern matching
regular expression processing with C.

Not in standard C, there are plenty of extensions (POSIX regex for example).

I disagree, one most certainly can.

There are no functions for doing this in the standard library, so one
would have to either write them, or find a library that already
contained them. But such a library could be written in strictly
conforming C, at least for the ASCII character set.

Didn't you see the clarification I posted an hour earlier?

--
Ian Collins.

[Jack Klein]

On Wed, 02 Apr 2008 17:23:03 +1300, Ian Collins <ia******@hotmail.com>
wrote in comp.lang.c:

Jack Klein wrote:

On Wed, 02 Apr 2008 15:36:41 +1300, Ian Collins <ia******@hotmail.com>
wrote in comp.lang.c:

Mahendra Kutare wrote:
Or do we need to have any specific library ?

I am more interested in knowing if we can do string pattern matching
regular expression processing with C.

Not in standard C, there are plenty of extensions (POSIX regex for example).

I disagree, one most certainly can.

There are no functions for doing this in the standard library, so one
would have to either write them, or find a library that already
contained them. But such a library could be written in strictly
conforming C, at least for the ASCII character set.

Didn't you see the clarification I posted an hour earlier?

Actually, I didn't, nor Don Bruder's reply that prompted it, otherwise
I would not have posted the amplification.

SuperNews just switched their servers on March 31, and my feed has
been a bit spotty since. Hopefully they'll have it squared away in
another day or two.

--
Jack Klein
Home: http://JK-Technology.Com
FAQs for
comp.lang.c http://c-faq.com/
comp.lang.c++ http://www.parashift.com/c++-faq-lite/
alt.comp.lang.learn.c-c++
http://www.club.cc.cmu.edu/~ajo/docs/FAQ-acllc.html