Template tag to automatically paginate a WP_Query instance

gistfile1.php

<?php

if ( !function_exists( 'get_pagination' ) ) :
/**
 * Return the pagination for the current (or instead, given) WP_Query or WP_Query_Users
 * object returned by paginate_links() function.
 *
 * @since 3.5.5
 * @uses paginate_links()
 * @uses $wp_query
 * @uses $wp_query_users
 * @uses $post
 * @uses $user
 * 
 * @param array $args Array of arguments for paginate_links()
 * @param object $wp_query Optional WP_Query or WP_Query_Users object
 * @return mixed The paginate links return
 */
function get_pagination( $args = '', $wp_query = '' ) {
	global $wp_rewrite;
	
	if ( $wp_rewrite->using_permalinks() ) {
		$url_split = explode( '?', get_pagenum_link(1) );
		$url_split[0] = trailingslashit( trim( $url_split[0], '/' ) ) . '%_%';
		
		if ( isset( $url_split[1] ) && $url_split[1] ) {
			$url_split[1] = '?'.$url_split[1];
		}
		
		$base = implode( '', $url_split );
		
		$format = '';
		if ( 'index.php/' == $wp_rewrite->root )
			$format = $wp_rewrite->root;
		
		$format .= 'page/%#%/';
		
		
	} else {
		$base = '%_%';
		$format = add_query_arg( 'page', '%#%' );
		
	}
	
	$args = wp_parse_args( $args, array(
		'base'         => $base,
		'format'       => $format,
		'total'        => 1,
		'current'      => 0,
		'show_all'     => false,
		'end_size'     => 1,
		'mid_size'     => 2,
		'prev_next'    => true,
		'prev_text'    => __( '&larr; Previous' ),
		'next_text'    => __( 'Next &rarr;' ),
		'type'         => 'plain',
		'add_args'     => false,
		'add_fragment' => ''
	) );
	
	
	if ( '' == $wp_query )
		global $wp_query;
		
	if ( is_a( $wp_query, 'WP_Query' ) ) {
		$args['total'] = round( $wp_query->max_num_pages );
		$args['current'] = max( 1, $wp_query->get( 'paged' ) );
		
	} elseif ( is_a( $wp_query, 'WP_Query_Users' ) ) {
		$args['total'] = round( $wp_query->max_num_pages );
		$args['current'] = max( 1, $wp_query->get( 'paged' ) );
		
	}
	
	$args 	= apply_filters( 'pre_get_the_pagination', $args, $wp_query );
	$result = paginate_links( $args );
	$result = apply_filters( 'get_the_pagination', $result, $args, $wp_query );
	
	return $result;
	
}
endif;


if ( !function_exists( 'the_pagination' ) ) :
/**
 * Displays the pagination for the current WP_Query
 * object returned by paginate_links() function.
 *
 * @since 3.5.5
 * 
 * @param array $args Array of arguments for paginate_links()
 */
function the_pagination( $args = '' ) {
	echo get_pagination( $args );
	
}
endif;