sv2tree.c

该软件可以方便的把HTML网页解析成一棵Tree

/*
**	HTML::Tree
**	mod/HTML/Tree/sv2tree.c
**
**	Copyright (C) 2001  Paul J. Lucas
**
**	This program is free software; you can redistribute it and/or modify
**	it under the terms of the GNU General Public License as published by
**	the Free Software Foundation; either version 2 of the License, or
**	(at your option) any later version.
**
**	This program is distributed in the hope that it will be useful,
**	but WITHOUT ANY WARRANTY; without even the implied warranty of
**	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
**	GNU General Public License for more details.
**
**	You should have received a copy of the GNU General Public License
**	along with this program; if not, write to the Free Software
**	Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/

#include "HTML_Tree.h"

// local
#include "util.h"			/* must go first */
#include "managed_ptr.h"

#ifndef PJL_NO_NAMESPACES
using namespace HTML_Tree;
#endif

//*****************************************************************************
//
// SYNOPSIS
//
	void sv2tree( SV *sv, Content_Node *parent )
//
// DESCRIPTION
//
//	Make an HTML::Tree from an sv and attach it to the given parent node.
//	The sv can be either a reference to an HTML::Tree, or a string.
//
// PARAMETERS
//
//	sv	An SV as described above.
//
//	parent	A pointer to the parent node to attach the resultant tree to.
//
//*****************************************************************************
{
	dTHX;
	if ( is_blessed_ref( sv ) && sv_isa( sv, "HTML::Tree" ) ) {
		managed_node *const node = reinterpret_cast< managed_node* >(
			SvIV( (SV*)SvRV( sv ) )
		);
		node->manage( false );
		parent->push_back( node->ptr() );
	} else if ( SvPOK( sv ) ) {
		STRLEN len;
		char const *const c_string = SvPV( sv, len );
		parent->push_back( html_parse(
			c_string, c_string + len, true
		) );
	} else
		croak( "not an HTML::Tree reference or a string" );
}