forked from osmocom/wireshark
84 lines
2.0 KiB
C
84 lines
2.0 KiB
C
/* dwarf.c
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* Common DWARF parts
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*
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* Wireshark - Network traffic analyzer
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* By Gerald Combs <gerald@wireshark.org>
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* Copyright 1998 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#include "config.h"
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#include <epan/tvbuff.h>
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#include "dwarf.h"
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gint
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dissect_uleb128(tvbuff_t *tvb, gint offset, guint64 *value)
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{
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guint start_offset = offset;
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guint shift = 0;
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guint8 byte;
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*value = 0;
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do {
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byte = tvb_get_guint8(tvb, offset);
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offset += 1;
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*value |= ((guint64)(byte & 0x7F) << shift);
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shift += 7;
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} while (byte & 0x80);
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return offset - start_offset;
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}
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gint
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dissect_leb128(tvbuff_t *tvb, gint offset, gint64 *value)
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{
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guint start_offset = offset;
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guint shift = 0;
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guint8 byte;
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*value = 0;
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do {
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byte = tvb_get_guint8(tvb, offset);
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offset += 1;
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*value |= ((guint64)(byte & 0x7F) << shift);
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shift += 7;
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} while (byte & 0x80);
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if (shift < 64 && byte & 0x40)
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*value |= - ((gint64)1 << shift);
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return offset - start_offset;
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}
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/*
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* Editor modelines - http://www.wireshark.org/tools/modelines.html
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*
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* Local variables:
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* c-basic-offset: 4
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* tab-width: 8
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* indent-tabs-mode: nil
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* End:
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*
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* vi: set shiftwidth=4 tabstop=8 expandtab:
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* :indentSize=4:tabSize=8:noTabs=true:
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*/
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