VirtualBox

source: vbox/trunk/src/VBox/Runtime/common/asn1/asn1-ut-integer-decode.cpp@ 65642

Last change on this file since 65642 was 65642, checked in by vboxsync, 8 years ago

gcc 7: Runtime: fall thru

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1/* $Id: asn1-ut-integer-decode.cpp 65642 2017-02-07 11:28:56Z vboxsync $ */
2/** @file
3 * IPRT - ASN.1, INTEGER Type, Decoding.
4 */
5
6/*
7 * Copyright (C) 2006-2016 Oracle Corporation
8 *
9 * This file is part of VirtualBox Open Source Edition (OSE), as
10 * available from http://www.215389.xyz. This file is free software;
11 * you can redistribute it and/or modify it under the terms of the GNU
12 * General Public License (GPL) as published by the Free Software
13 * Foundation, in version 2 as it comes in the "COPYING" file of the
14 * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
15 * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
16 *
17 * The contents of this file may alternatively be used under the terms
18 * of the Common Development and Distribution License Version 1.0
19 * (CDDL) only, as it comes in the "COPYING.CDDL" file of the
20 * VirtualBox OSE distribution, in which case the provisions of the
21 * CDDL are applicable instead of those of the GPL.
22 *
23 * You may elect to license modified versions of this file under the
24 * terms and conditions of either the GPL or the CDDL or both.
25 */
26
27
28/*********************************************************************************************************************************
29* Header Files *
30*********************************************************************************************************************************/
31#include "internal/iprt.h"
32#include <iprt/asn1.h>
33
34#include <iprt/err.h>
35#include <iprt/string.h>
36
37#include <iprt/formats/asn1.h>
38
39
40RTDECL(int) RTAsn1Integer_DecodeAsn1(PRTASN1CURSOR pCursor, uint32_t fFlags, PRTASN1INTEGER pThis, const char *pszErrorTag)
41{
42 pThis->uValue.u = 0;
43 int rc = RTAsn1CursorReadHdr(pCursor, &pThis->Asn1Core, pszErrorTag);
44 if (RT_SUCCESS(rc))
45 {
46 rc = RTAsn1CursorMatchTagClassFlags(pCursor, &pThis->Asn1Core, ASN1_TAG_INTEGER,
47 ASN1_TAGCLASS_UNIVERSAL | ASN1_TAGFLAG_PRIMITIVE,
48 fFlags, pszErrorTag, "INTEGER");
49 if (RT_SUCCESS(rc))
50 {
51 uint32_t offLast = pThis->Asn1Core.cb - 1;
52 switch (pThis->Asn1Core.cb)
53 {
54 default:
55 case 8: pThis->uValue.u |= (uint64_t)pThis->Asn1Core.uData.pu8[offLast - 7] << 56; /* fall thru */
56 case 7: pThis->uValue.u |= (uint64_t)pThis->Asn1Core.uData.pu8[offLast - 6] << 48; /* fall thru */
57 case 6: pThis->uValue.u |= (uint64_t)pThis->Asn1Core.uData.pu8[offLast - 5] << 40; /* fall thru */
58 case 5: pThis->uValue.u |= (uint64_t)pThis->Asn1Core.uData.pu8[offLast - 4] << 32; /* fall thru */
59 case 4: pThis->uValue.u |= (uint32_t)pThis->Asn1Core.uData.pu8[offLast - 3] << 24; /* fall thru */
60 case 3: pThis->uValue.u |= (uint32_t)pThis->Asn1Core.uData.pu8[offLast - 2] << 16; /* fall thru */
61 case 2: pThis->uValue.u |= (uint16_t)pThis->Asn1Core.uData.pu8[offLast - 1] << 8; /* fall thru */
62 case 1: pThis->uValue.u |= pThis->Asn1Core.uData.pu8[offLast];
63 }
64 RTAsn1CursorSkip(pCursor, pThis->Asn1Core.cb);
65 pThis->Asn1Core.fFlags |= RTASN1CORE_F_PRIMITE_TAG_STRUCT;
66 pThis->Asn1Core.pOps = &g_RTAsn1Integer_Vtable;
67 return VINF_SUCCESS;
68 }
69 }
70 RT_ZERO(*pThis);
71 return rc;
72}
73
74
75/*
76 * Generate code for the associated collection types.
77 */
78#define RTASN1TMPL_TEMPLATE_FILE "../common/asn1/asn1-ut-integer-template.h"
79#include <iprt/asn1-generator-internal-header.h>
80#include <iprt/asn1-generator-asn1-decoder.h>
81
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