diff options
Diffstat (limited to 'lens.h')
| -rw-r--r-- | lens.h | 51 |
1 files changed, 51 insertions, 0 deletions
@@ -0,0 +1,51 @@ +/* + * This file is part of ltrace. + * Copyright (C) 2011 Petr Machata, Red Hat Inc. + * + * 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., 51 Franklin St, Fifth Floor, Boston, MA + * 02110-1301 USA + */ + +#ifndef LENS_H +#define LENS_H + +#include <stdio.h> +#include "forward.h" + +struct lens { + /* Format VALUE into STREAM. The dictionary of all arguments + * is given for purposes of evaluating array lengths and other + * dynamic expressions. Returns number of characters + * outputted, -1 in case of failure. */ + int (*format_cb)(struct lens *lens, FILE *stream, struct value *value, + struct value_dict *arguments); + + /* Erase any memory allocated for LENS. Keep the LENS pointer + * itself intact. */ + void (*destroy_cb)(struct lens *lens); +}; + +/* Extracts a lens from VALUE and calls lens_format on that. */ +int format_argument(FILE *stream, struct value *value, + struct value_dict *arguments); + +/* Calls format callback associated with LENS. */ +int lens_format(struct lens *lens, FILE *stream, struct value *value, + struct value_dict *arguments); + +/* Calls destroy callback associated with LENS. */ +void lens_destroy(struct lens *lens); + +#endif /* LENS_H */ |