51 lines
1.7 KiB
C
51 lines
1.7 KiB
C
/*
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* This file is part of ltrace.
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* Copyright (C) 2011 Petr Machata, Red Hat Inc.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of the
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* License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
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* 02110-1301 USA
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*/
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#ifndef LENS_H
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#define LENS_H
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#include <stdio.h>
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#include "forward.h"
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struct lens {
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/* Format VALUE into STREAM. The dictionary of all arguments
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* is given for purposes of evaluating array lengths and other
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* dynamic expressions. Returns number of characters
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* outputted, -1 in case of failure. */
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int (*format_cb)(struct lens *lens, FILE *stream, struct value *value,
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struct value_dict *arguments);
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/* Erase any memory allocated for LENS. Keep the LENS pointer
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* itself intact. */
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void (*destroy_cb)(struct lens *lens);
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};
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/* Extracts a lens from VALUE and calls lens_format on that. */
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int format_argument(FILE *stream, struct value *value,
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struct value_dict *arguments);
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/* Calls format callback associated with LENS. */
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int lens_format(struct lens *lens, FILE *stream, struct value *value,
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struct value_dict *arguments);
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/* Calls destroy callback associated with LENS. */
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void lens_destroy(struct lens *lens);
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#endif /* LENS_H */
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