dev-cpp-users

[Dev-C++] regexp howto in C/C++

[Szathmary L. <sz...@de...>]

Hi!

I first met regular expressions in Perl. In this language it's very easy
to use regexp, so could anyone tell me how to transform them to C?
Let's see an example:

$line = "<name>QL</name><path>ql.exe</path>";
if ($line =~ m#<name>(.*)</name><path>(.*)</path>#)
{
   print "Name: $1, path: $2\n";
}

How could it be rewritten to C? Which regexp. library do you suggest
using?

	Thanks in advance,

			Laszlo

[Dev-C++] regexp howto in C/C++

[<cbu...@to...>]

Hello!

There's a tool called "flex" which generates C routines that do regexp 
based pattern matching.on text.

In Linux this tool is included by most of the distros. It is also included 
with DJGPP, which is the DOS port of the GCC C compiler. I see that 
Mingw has Bison as an experimental package, but that's something 
different   

Regards

Cristian Burneci

Szathmary Laszlo <sz...@de...> wrote:

Hi!

I first met regular expressions in Perl. In this language it's very easy
to use regexp, so could anyone tell me how to transform them to C?

<snip>

Re: [Dev-C++] regexp howto in C/C++

[Per W. <pw...@ia...>]

flex is the lexical analyzer tool, and is a gnu version of lex

bison is the parser generator, and is a gnu version of yacc.

flex requires you to write a rule-set, and will then generate c source
code. However, there are a lot of other libraries specialized on handling
regexp, i.e. they allow the regexp to be specified as a text string during
run-time.

/Per W

On Sun, 13 Apr 2003 cbu...@to... wrote:

> Hello!
>
> There's a tool called "flex" which generates C routines that do regexp
> based pattern matching.on text.
>
> In Linux this tool is included by most of the distros. It is also included
> with DJGPP, which is the DOS port of the GCC C compiler. I see that
> Mingw has Bison as an experimental package, but that's something
> different
>
> Regards
>
> Cristian Burneci
>
> Szathmary Laszlo <sz...@de...> wrote:
>
> Hi!
>
> I first met regular expressions in Perl. In this language it's very easy
> to use regexp, so could anyone tell me how to transform them to C?
>
> <snip>
>
>
> -------------------------------------------------------
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Re: [Dev-C++] regexp howto in C/C++

[Shayne K. <err...@ne...>]

Well I suppose if you were a masochist you could embed perl into your
C application (examples on the Perl site).  Or you could use the PCRE
library (http://gnuwin32.sourceforge.net/packages/pcre.htm)

There's probably a regex library from MS and maybe others, check
http://www.freshmeat.net as well.

- Shayne

http://www.shaynekasai.com

On Tue, 6 May 2003, Szathmary Laszlo wrote:

> Hi!
>
> I first met regular expressions in Perl. In this language it's very easy
> to use regexp, so could anyone tell me how to transform them to C?
> Let's see an example:
>
> $line = "<name>QL</name><path>ql.exe</path>";
> if ($line =~ m#<name>(.*)</name><path>(.*)</path>#)
> {
>    print "Name: $1, path: $2\n";
> }
>
> How could it be rewritten to C? Which regexp. library do you suggest
> using?
>
> 	Thanks in advance,
>
> 			Laszlo
>
>
>
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