+ const char **ppsz_filter = calloc( i_count, sizeof(*ppsz_filter) );
+ if( !ppsz_filter )
+ {
+ free( psz_list );
+ return false;
+ }
+ bool b_present = false;
+ i_count = 0;
+ for( char *p = psz_list; p && *p; )
+ {
+ char *psz_end = strchr(p, ':');
+ if( psz_end )
+ *psz_end++ = '\0';
+ else
+ psz_end = p + strlen(p);
+ if( *p )
+ {
+ b_present |= !strcmp( p, psz_name );
+ ppsz_filter[i_count++] = p;
+ }
+ p = psz_end;
+ }
+ if( b_present == b_add )
+ {
+ free( ppsz_filter );
+ free( psz_list );
+ return false;
+ }
+
+ if( b_add )
+ {
+ int i_order = FilterOrder( psz_name );
+ int i;
+ for( i = 0; i < i_count; i++ )
+ {
+ if( FilterOrder( ppsz_filter[i] ) > i_order )
+ break;
+ }
+ if( i < i_count )
+ memmove( &ppsz_filter[i+1], &ppsz_filter[i], (i_count - i) * sizeof(*ppsz_filter) );
+ ppsz_filter[i] = psz_name;
+ i_count++;
+ }
+ else
+ {
+ for( int i = 0; i < i_count; i++ )
+ {
+ if( !strcmp( ppsz_filter[i], psz_name ) )
+ ppsz_filter[i] = "";
+ }
+ }
+ size_t i_length = 0;
+ for( int i = 0; i < i_count; i++ )
+ i_length += 1 + strlen( ppsz_filter[i] );
+
+ char *psz_new = malloc( i_length + 1 );
+ *psz_new = '\0';
+ for( int i = 0; i < i_count; i++ )
+ {
+ if( *ppsz_filter[i] == '\0' )
+ continue;
+ if( *psz_new )
+ strcat( psz_new, ":" );
+ strcat( psz_new, ppsz_filter[i] );
+ }
+ free( ppsz_filter );
+ free( psz_list );
+
+ if( p_aout )
+ var_SetString( p_aout, psz_variable, psz_new );
+ else
+ config_PutPsz( p_obj, psz_variable, psz_new );
+ free( psz_new );
+
+ return true;