S*[t-r]+[ing]?g

gr33ndata · 03-11-2004, 09:42 AM

Hi

Does anyone knows some library in linux for searching for format strings or whatever it is called

For example:

Suppose I want to search for a substring in another string startin with a letter X and then some numbers

So I use X[0-9]+ or X*[0-9]+ etc.

??

jim mcnamara · 03-11-2004, 09:47 AM

Those are called regular expressions.

man regexp

will give you an overview of how they work, even tho this is meant for use inside C or C++ code. Any perl book, or basic unix book has a section on regular expressions.

gr33ndata · 03-11-2004, 10:01 AM

ok
thnx a lot

Strike · 03-11-2004, 10:23 AM

What language are you coding in? We can't point you to a regexp library without knowing that.

gr33ndata · 03-12-2004, 01:24 PM

I use C/C++

Hko · 03-12-2004, 02:33 PM

For regular expression in C, see "man regcomp".

gr33ndata · 03-12-2004, 04:55 PM

regcomp or regexp ??

infamous41md · 03-12-2004, 06:24 PM

there is also 'prce', perl compatible regular expressions if you are more comfortable w/ those. and it's 'man regex' for POSIX regex's

gr33ndata · 03-12-2004, 06:55 PM

What about LEX
Can I use LEX with strings instead of files

ie. yyin = some string instead of fopen("somefile","r");

llama_meme · 03-12-2004, 07:22 PM

If you could it really wouldn't be worth the trouble — the POSIX regexp functions are quite easy to use.

Alex

Hko · 03-13-2004, 05:15 AM

Quote:

Originally posted by gr33ndata
regcomp or regexp ??

You need both regcomp() and regexec().
regexp is the struct they use.