Building an argc/argv style structure from a string (char*) Post: 302380929

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Top Forums Programming Building an argc/argv style structure from a string (char*) Post 302380929 by cbarwise on Wednesday 16th of December 2009 04:52:06 PM

12-16-2009

Registered User

Hi Jim,

Ok, I'll start from scratch with what I'm doing and perhaps there's an easier way you might see.

I'm writing an application that uses vi-like keybindings and has a command-mode similar to vi. Specifically, in command mode one can do a "write" just like in vi
:w
-or- to save the current playlist (this is a music application), one can do
:w filename

If they specificy a filename such as
:w foo\ bar
or,
:w "foo bar"

In these cases, I'd obviously like to be able to parse the parameters correctly (i.e. recognize that "foo\ bar" is one string, not two).

There are other a few other commands I have (and I'm currently working on a few more), that take multiple parameters, and I'd like to be able to handle spaces and quoting correctly for them.

About my current setup:
All of the command functions take two params, "int argc" and "char *argv[]", just like a regular "main" function. I then have an array of strings and function pointers (to these functions) that behaves essentially like a path.
When a user is in command mode and enters a string, I parse that string into a (bad) argc/argv structure, and then search the path for a matching named record, and if found, execute the function with the argc/argv that I built.

Does this help make clear at least my setup and what I'm asking about? I can point you to code if you would like.

Thanks again,
-Ryan

cbarwise

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mojo::path

Mojo::Path(3pm) 					User Contributed Perl Documentation					   Mojo::Path(3pm)

NAME

       Mojo::Path - Path

SYNOPSIS

	 use Mojo::Path;

	 my $path = Mojo::Path->new('/foo%2Fbar%3B/baz.html');
	 shift @{$path->parts};
	 say $path;

DESCRIPTION

       Mojo::Path is a container for URL paths.

ATTRIBUTES

       Mojo::Path implements the following attributes.

   "leading_slash"
	 my $leading_slash = $path->leading_slash;
	 $path		   = $path->leading_slash(1);

       Path has a leading slash.

   "parts"
	 my $parts = $path->parts;
	 $path	   = $path->parts([qw(foo bar baz)]);

       The path parts.

	 # Part with slash
	 push @{$path->parts}, 'foo/bar';

   "trailing_slash"
	 my $trailing_slash = $path->trailing_slash;
	 $path		    = $path->trailing_slash(1);

       Path has a trailing slash.

METHODS

       Mojo::Path inherits all methods from Mojo::Base and implements the following new ones.

   "new"
	 my $path = Mojo::Path->new;
	 my $path = Mojo::Path->new('/foo%2Fbar%3B/baz.html');

       Construct a new Mojo::Path object.

   "canonicalize"
	 $path = $path->canonicalize;

       Canonicalize path.

	 # "/foo/baz"
	 Mojo::Path->new('/foo/bar/../baz')->canonicalize;

   "clone"
	 my $clone = $path->clone;

       Clone path.

   "contains"
	 my $success = $path->contains('/foo');

       Check if path contains given prefix.

	 # True
	 Mojo::Path->new('/foo/bar')->contains('/');
	 Mojo::Path->new('/foo/bar')->contains('/foo');
	 Mojo::Path->new('/foo/bar')->contains('/foo/bar');

	 # False
	 Mojo::Path->new('/foo/bar')->contains('/f');
	 Mojo::Path->new('/foo/bar')->contains('/bar');
	 Mojo::Path->new('/foo/bar')->contains('/whatever');

   "merge"
	 $path = $path->merge('/foo/bar');
	 $path = $path->merge('foo/bar');
	 $path = $path->merge(Mojo::Path->new('foo/bar'));

       Merge paths.

	 # "/baz/yada"
	 Mojo::Path->new('/foo/bar')->merge('/baz/yada');

	 # "/foo/baz/yada"
	 Mojo::Path->new('/foo/bar')->merge('baz/yada');

	 # "/foo/bar/baz/yada"
	 Mojo::Path->new('/foo/bar/')->merge('baz/yada');

   "parse"
	 $path = $path->parse('/foo%2Fbar%3B/baz.html');

       Parse path. Note that %2F will be treated as "/" for security reasons.

   "to_abs_string"
	 my $string = $path->to_abs_string;

       Turn path into an absolute string.

   "to_string"
	 my $string = $path->to_string;

       Turn path into a string.

SEE ALSO

       Mojolicious, Mojolicious::Guides, <http://mojolicio.us>.

perl v5.14.2							    2012-09-05							   Mojo::Path(3pm)