forked from osmocom/wireshark
117 lines
2.7 KiB
C
117 lines
2.7 KiB
C
/* ptvcursor.c
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*
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* Proto Tree TVBuff cursor
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* Gilbert Ramirez <gram@alumni.rice.edu>
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*
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* $Id: ptvcursor.c,v 1.7 2002/08/28 21:00:41 jmayer Exp $
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*
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* Ethereal - Network traffic analyzer
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* By Gerald Combs <gerald@zing.org>
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* Copyright 2000 Gerald Combs
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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
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* as published by the Free Software Foundation; either version 2
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* of the 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,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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#include "ptvcursor.h"
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struct ptvcursor {
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proto_tree *tree;
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tvbuff_t *tvb;
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gint offset;
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};
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/* Allocates an initializes a ptvcursor_t with 3 variables:
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* proto_tree, tvbuff, and offset. */
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ptvcursor_t*
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ptvcursor_new(proto_tree *tree, tvbuff_t *tvb, gint offset)
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{
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ptvcursor_t *ptvc;
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ptvc = g_new(ptvcursor_t, 1);
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ptvc->tree = tree;
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ptvc->tvb = tvb;
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ptvc->offset = offset;
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return ptvc;
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}
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/* Gets data from tvbuff, adds it to proto_tree, increments offset,
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* and returns proto_item* */
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proto_item*
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ptvcursor_add(ptvcursor_t *ptvc, int hf, gint length, gboolean endianness)
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{
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proto_item *item;
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item = ptvcursor_add_no_advance(ptvc, hf, length, endianness);
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ptvc->offset += proto_item_get_len(item);
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return item;
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}
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/* Gets data from tvbuff, adds it to proto_tree, *DOES NOT* increment
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* offset, and returns proto_item* */
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proto_item*
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ptvcursor_add_no_advance(ptvcursor_t* ptvc, int hf, gint length,
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gboolean endianness)
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{
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proto_item *item;
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item = proto_tree_add_item(ptvc->tree, hf, ptvc->tvb, ptvc->offset,
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length, endianness);
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return item;
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}
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/* Advance the ptvcursor's offset within its tvbuff without
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* adding anything to the proto_tree. */
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void
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ptvcursor_advance(ptvcursor_t* ptvc, gint length)
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{
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ptvc->offset += length;
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}
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/* Frees memory for ptvcursor_t, but nothing deeper than that. */
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void
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ptvcursor_free(ptvcursor_t *ptvc)
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{
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g_free(ptvc);
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}
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/* Returns tvbuff. */
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tvbuff_t*
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ptvcursor_tvbuff(ptvcursor_t* ptvc)
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{
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return ptvc->tvb;
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}
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/* Returns current offset. */
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gint
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ptvcursor_current_offset(ptvcursor_t* ptvc)
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{
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return ptvc->offset;
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}
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proto_tree*
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ptvcursor_tree(ptvcursor_t* ptvc)
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{
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return ptvc->tree;
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}
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void
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ptvcursor_set_tree(ptvcursor_t* ptvc, proto_tree *tree)
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{
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ptvc->tree = tree;
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}
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