--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/web/wp-includes/meta.php	Fri Mar 12 13:29:04 2010 +0000
@@ -0,0 +1,225 @@
+<?php
+/**
+ * Meta API
+ *
+ * Functions for retrieving and manipulating metadata
+ *
+ * @package WordPress
+ * @subpackage Meta
+ * @since 2.9.0
+ */
+
+function add_metadata($meta_type, $object_id, $meta_key, $meta_value, $unique = false) {
+	if ( !$meta_type || !$meta_key )
+		return false;
+
+	if ( ! $table = _get_meta_table($meta_type) )
+		return false;
+
+	global $wpdb;
+
+	$column = esc_sql($meta_type . '_id');
+
+	// expected_slashed ($meta_key)
+	$meta_key = stripslashes($meta_key);
+
+	if ( $unique && $wpdb->get_var( $wpdb->prepare(
+		"SELECT COUNT(*) FROM $table WHERE meta_key = %s AND $column = %d",
+		$meta_key, $object_id ) ) )
+		return false;
+
+	$meta_value = maybe_serialize( stripslashes_deep($meta_value) );
+
+	$wpdb->insert( $table, array(
+		$column => $object_id,
+		'meta_key' => $meta_key,
+		'meta_value' => $meta_value
+	) );
+
+	wp_cache_delete($object_id, $meta_type . '_meta');
+
+	do_action( "added_{$meta_type}_meta", $wpdb->insert_id, $object_id, $meta_key, $meta_value );
+
+	return true;
+}
+
+function update_metadata($meta_type, $object_id, $meta_key, $meta_value, $prev_value = '') {
+	if ( !$meta_type || !$meta_key )
+		return false;
+
+	if ( ! $table = _get_meta_table($meta_type) )
+		return false;
+
+	global $wpdb;
+
+	$column = esc_sql($meta_type . '_id');
+	$id_column = 'user' == $meta_type ? 'umeta_id' : 'meta_id';
+
+	// expected_slashed ($meta_key)
+	$meta_key = stripslashes($meta_key);
+
+	if ( ! $meta_id = $wpdb->get_var( $wpdb->prepare( "SELECT $id_column FROM $table WHERE meta_key = %s AND $column = %d", $meta_key, $object_id ) ) )
+		return add_metadata($meta_type, $object_id, $meta_key, $meta_value);
+
+	$meta_value = maybe_serialize( stripslashes_deep($meta_value) );
+
+	$data  = compact( 'meta_value' );
+	$where = array( $column => $object_id, 'meta_key' => $meta_key );
+
+	if ( !empty( $prev_value ) ) {
+		$prev_value = maybe_serialize($prev_value);
+		$where['meta_value'] = $prev_value;
+	}
+
+	do_action( "update_{$meta_type}_meta", $meta_id, $object_id, $meta_key, $meta_value );
+
+	$wpdb->update( $table, $data, $where );
+	wp_cache_delete($object_id, $meta_type . '_meta');
+
+	do_action( "updated_{$meta_type}_meta", $meta_id, $object_id, $meta_key, $meta_value );
+
+	return true;
+}
+
+function delete_metadata($meta_type, $object_id, $meta_key, $meta_value = '', $delete_all = false) {
+	if ( !$meta_type || !$meta_key || (!$delete_all && ! (int)$object_id) )
+		return false;
+
+	if ( ! $table = _get_meta_table($meta_type) )
+		return false;
+
+	global $wpdb;
+
+	$type_column = esc_sql($meta_type . '_id');
+	$id_column = 'user' == $meta_type ? 'umeta_id' : 'meta_id';
+	// expected_slashed ($meta_key)
+	$meta_key = stripslashes($meta_key);
+	$meta_value = maybe_serialize( stripslashes_deep($meta_value) );
+
+	$query = $wpdb->prepare( "SELECT $id_column FROM $table WHERE meta_key = %s", $meta_key );
+
+	if ( !$delete_all )
+		$query .= $wpdb->prepare(" AND $type_column = %d", $object_id );
+
+	if ( $meta_value )
+		$query .= $wpdb->prepare(" AND meta_value = %s", $meta_value );
+
+	$meta_ids = $wpdb->get_col( $query );
+	if ( !count( $meta_ids ) )
+		return false;
+
+	$query = "DELETE FROM $table WHERE $id_column IN( " . implode( ',', $meta_ids ) . " )";
+
+	$count = $wpdb->query($query);
+
+	if ( !$count )
+		return false;
+
+	wp_cache_delete($object_id, $meta_type . '_meta');
+
+	do_action( "deleted_{$meta_type}_meta", $meta_ids, $object_id, $meta_key, $meta_value );
+
+	return true;
+}
+
+function get_metadata($meta_type, $object_id, $meta_key = '', $single = false) {
+	if ( !$meta_type )
+		return false;
+
+	$meta_cache = wp_cache_get($object_id, $meta_type . '_meta');
+
+	if ( !$meta_cache ) {
+		update_meta_cache($meta_type, $object_id);
+		$meta_cache = wp_cache_get($object_id, $meta_type . '_meta');
+	}
+
+	if ( ! $meta_key )
+		return $meta_cache;
+
+	if ( isset($meta_cache[$meta_key]) ) {
+		if ( $single ) {
+			return maybe_unserialize( $meta_cache[$meta_key][0] );
+		} else {
+			return array_map('maybe_unserialize', $meta_cache[$meta_key]);
+		}
+	}
+
+	if ($single)
+		return '';
+	else
+		return array();
+}
+
+function update_meta_cache($meta_type, $object_ids) {
+	if ( empty( $meta_type ) || empty( $object_ids ) )
+		return false;
+
+	if ( ! $table = _get_meta_table($meta_type) )
+		return false;
+
+	$column = esc_sql($meta_type . '_id');
+
+	global $wpdb;
+
+	if ( !is_array($object_ids) ) {
+		$object_ids = preg_replace('|[^0-9,]|', '', $object_ids);
+		$object_ids = explode(',', $object_ids);
+	}
+
+	$object_ids = array_map('intval', $object_ids);
+
+	$cache_key = $meta_type . '_meta';
+	$ids = array();
+	foreach ( $object_ids as $id ) {
+		if ( false === wp_cache_get($id, $cache_key) )
+			$ids[] = $id;
+	}
+
+	if ( empty( $ids ) )
+		return false;
+
+	// Get meta info
+	$id_list = join(',', $ids);
+	$cache = array();
+	$meta_list = $wpdb->get_results( $wpdb->prepare("SELECT $column, meta_key, meta_value FROM $table WHERE $column IN ($id_list)",
+		$meta_type), ARRAY_A );
+
+	if ( !empty($meta_list) ) {
+		foreach ( $meta_list as $metarow) {
+			$mpid = intval($metarow[$column]);
+			$mkey = $metarow['meta_key'];
+			$mval = $metarow['meta_value'];
+
+			// Force subkeys to be array type:
+			if ( !isset($cache[$mpid]) || !is_array($cache[$mpid]) )
+				$cache[$mpid] = array();
+			if ( !isset($cache[$mpid][$mkey]) || !is_array($cache[$mpid][$mkey]) )
+				$cache[$mpid][$mkey] = array();
+
+			// Add a value to the current pid/key:
+			$cache[$mpid][$mkey][] = $mval;
+		}
+	}
+
+	foreach ( $ids as $id ) {
+		if ( ! isset($cache[$id]) )
+			$cache[$id] = array();
+	}
+
+	foreach ( array_keys($cache) as $object)
+		wp_cache_set($object, $cache[$object], $cache_key);
+
+	return $cache;
+}
+
+function _get_meta_table($type) {
+	global $wpdb;
+
+	$table_name = $type . 'meta';
+
+	if ( empty($wpdb->$table_name) )
+		return false;
+
+	return $wpdb->$table_name;
+}
+?>