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| -rw-r--r-- | include/VBox/com/Guid.h | 526 |
1 files changed, 526 insertions, 0 deletions
diff --git a/include/VBox/com/Guid.h b/include/VBox/com/Guid.h new file mode 100644 index 00000000..42663323 --- /dev/null +++ b/include/VBox/com/Guid.h @@ -0,0 +1,526 @@ +/* $Id: Guid.h $ */ +/** @file + * MS COM / XPCOM Abstraction Layer - Guid class declaration. + */ + +/* + * Copyright (C) 2006-2022 Oracle and/or its affiliates. + * + * This file is part of VirtualBox base platform packages, as + * available from https://www.virtualbox.org. + * + * 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, in version 3 of the + * License. + * + * 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, see <https://www.gnu.org/licenses>. + * + * The contents of this file may alternatively be used under the terms + * of the Common Development and Distribution License Version 1.0 + * (CDDL), a copy of it is provided in the "COPYING.CDDL" file included + * in the VirtualBox distribution, in which case the provisions of the + * CDDL are applicable instead of those of the GPL. + * + * You may elect to license modified versions of this file under the + * terms and conditions of either the GPL or the CDDL or both. + * + * SPDX-License-Identifier: GPL-3.0-only OR CDDL-1.0 + */ + +#ifndef VBOX_INCLUDED_com_Guid_h +#define VBOX_INCLUDED_com_Guid_h +#ifndef RT_WITHOUT_PRAGMA_ONCE +# pragma once +#endif + +/* Make sure all the stdint.h macros are included - must come first! */ +#ifndef __STDC_LIMIT_MACROS +# define __STDC_LIMIT_MACROS +#endif +#ifndef __STDC_CONSTANT_MACROS +# define __STDC_CONSTANT_MACROS +#endif + +#include "VBox/com/string.h" + +#include <iprt/uuid.h> + + +/** @defgroup grp_com_guid GUID Class + * @ingroup grp_com + * @{ + */ + +namespace com +{ + +typedef enum GuidState_t +{ + GUID_ZERO, + GUID_NORMAL, + GUID_INVALID +} GuidState_t; + +/** + * Helper class that represents the UUID type and hides platform-specific + * implementation details. + */ +class Guid +{ +public: + + Guid() + { + clear(); + } + + Guid(const Guid &that) + { + mUuid = that.mUuid; + mGuidState = that.mGuidState; + dbg_refresh(); + } + + Guid(const RTUUID &that) + { + mUuid = that; + updateState(); + dbg_refresh(); + } + + Guid(const GUID &that) + { + AssertCompileSize(GUID, sizeof(RTUUID)); + ::memcpy(&mUuid, &that, sizeof(GUID)); + updateState(); + dbg_refresh(); + } + + /** + * Construct a GUID from a string. + * + * @param that The UUID string. Can be with or without the curly + * brackets. Empty strings are translated to a zero + * GUID, and strings which are not confirming to + * valid GUID string representations are marked as + * invalid. + */ + Guid(const char *that) + { + initString(that); + } + + /** + * Construct a GUID from a BSTR. + * + * @param that The UUID BSTR. Can be with or without the curly + * brackets. Empty strings are translated to a zero + * GUID, and strings which are not confirming to + * valid GUID string representations are marked as + * invalid. + */ + Guid(CBSTR that) + { + initBSTR(that); + } + + /** + * Construct a GUID from a Utf8Str. + * + * @param that The UUID Utf8Str. Can be with or without the curly + * brackets. Empty strings are translated to a zero + * GUID, and strings which are not confirming to + * valid GUID string representations are marked as + */ + Guid(const Utf8Str &that) + { + initString(that.c_str()); + } + + /** + * Construct a GUID from a RTCString. + * + * @param that The UUID RTCString. Can be with or without the curly + * brackets. Empty strings are translated to a zero + * GUID, and strings which are not confirming to + * valid GUID string representations are marked as + */ + Guid(const RTCString &that) + { + initString(that.c_str()); + } + + /** + * Construct a GUID from a Bstr. + * + * @param that The UUID Bstr. Can be with or without the curly + * brackets. Empty strings are translated to a zero + * GUID, and strings which are not confirming to + * valid GUID string representations are marked as + */ + Guid(const Bstr &that) + { + initBSTR(that.raw()); + } + + Guid& operator=(const Guid &that) + { + mUuid = that.mUuid; + mGuidState = that.mGuidState; + dbg_refresh(); + return *this; + } + + Guid& operator=(const RTUUID &guid) + { + mUuid = guid; + updateState(); + dbg_refresh(); + return *this; + } + + Guid& operator=(const GUID &guid) + { + AssertCompileSize(GUID, sizeof(RTUUID)); + ::memcpy(&mUuid, &guid, sizeof(GUID)); + updateState(); + dbg_refresh(); + return *this; + } + + Guid& operator=(const char *str) + { + initString(str); + return *this; + } + + Guid& operator=(CBSTR str) + { + initBSTR(str); + return *this; + } + + Guid& operator=(const Utf8Str &str) + { + return operator=(str.c_str()); + } + + Guid& operator=(const RTCString &str) + { + return operator=(str.c_str()); + } + + Guid& operator=(const Bstr &str) + { + return operator=(str.raw()); + } + + void create() + { + ::RTUuidCreate(&mUuid); + mGuidState = GUID_NORMAL; + dbg_refresh(); + } + + void clear() + { + makeClear(); + dbg_refresh(); + } + + /** + * Convert the GUID to a string. + * + * @returns String object containing the formatted GUID. + * @throws std::bad_alloc + */ + Utf8Str toString() const + { + if (mGuidState == GUID_INVALID) + { + /* What to return in case of wrong Guid */ + return Utf8Str("00000000-0000-0000-0000-00000000000"); + } + + char buf[RTUUID_STR_LENGTH]; + ::memset(buf, '\0', sizeof(buf)); + ::RTUuidToStr(&mUuid, buf, sizeof(buf)); + + return Utf8Str(buf); + } + + /** + * Like toString, but encloses the returned string in curly brackets. + * + * @returns String object containing the formatted GUID in curly brackets. + * @throws std::bad_alloc + */ + Utf8Str toStringCurly() const + { + if (mGuidState == GUID_INVALID) + { + /* What to return in case of wrong Guid */ + return Utf8Str("{00000000-0000-0000-0000-00000000000}"); + } + + char buf[RTUUID_STR_LENGTH + 2]; + ::memset(buf, '\0', sizeof(buf)); + ::RTUuidToStr(&mUuid, buf + 1, sizeof(buf) - 2); + buf[0] = '{'; + buf[sizeof(buf) - 2] = '}'; + + return Utf8Str(buf); + } + + /** + * Convert the GUID to a string. + * + * @returns Bstr object containing the formatted GUID. + * @throws std::bad_alloc + */ + Bstr toUtf16() const + { + if (mGuidState == GUID_INVALID) + { + /* What to return in case of wrong Guid */ + return Bstr("00000000-0000-0000-0000-00000000000"); + } + + RTUTF16 buf[RTUUID_STR_LENGTH]; + ::memset(buf, '\0', sizeof(buf)); + ::RTUuidToUtf16(&mUuid, buf, RT_ELEMENTS(buf)); + + return Bstr(buf); + } + + /** + * Convert the GUID to a C string. + * + * @returns See RTUuidToStr. + * @param pszUuid The output buffer + * @param cbUuid The size of the output buffer. Should be at least + * RTUUID_STR_LENGTH in length. + */ + int toString(char *pszUuid, size_t cbUuid) const + { + return ::RTUuidToStr(mGuidState != GUID_INVALID ? &mUuid : &Empty.mUuid, pszUuid, cbUuid); + } + + bool isValid() const + { + return mGuidState != GUID_INVALID; + } + + bool isZero() const + { + return mGuidState == GUID_ZERO; + } + + bool operator==(const Guid &that) const { return ::RTUuidCompare(&mUuid, &that.mUuid) == 0; } + bool operator==(const RTUUID &guid) const { return ::RTUuidCompare(&mUuid, &guid) == 0; } + bool operator==(const GUID &guid) const { return ::RTUuidCompare(&mUuid, (PRTUUID)&guid) == 0; } + bool operator!=(const Guid &that) const { return !operator==(that); } + bool operator!=(const GUID &guid) const { return !operator==(guid); } + bool operator!=(const RTUUID &guid) const { return !operator==(guid); } + bool operator<(const Guid &that) const { return ::RTUuidCompare(&mUuid, &that.mUuid) < 0; } + bool operator<(const GUID &guid) const { return ::RTUuidCompare(&mUuid, (PRTUUID)&guid) < 0; } + bool operator<(const RTUUID &guid) const { return ::RTUuidCompare(&mUuid, &guid) < 0; } + + /** Compare with a UUID string representation. + * @note Not an operator as that could lead to confusion. */ + bool equalsString(const char *pszUuid2) const { return ::RTUuidCompareStr(&mUuid, pszUuid2) == 0; } + + /** + * To directly copy the contents to a GUID, or for passing it as an input + * parameter of type (const GUID *), the compiler converts. */ + const GUID &ref() const + { + return *(const GUID *)&mUuid; + } + + /** + * To pass instances to printf-like functions. + */ + PCRTUUID raw() const + { + return (PCRTUUID)&mUuid; + } + +#if !defined(VBOX_WITH_XPCOM) + + /** To assign instances to OUT_GUID parameters from within the interface + * method. */ + const Guid &cloneTo(GUID *pguid) const + { + if (pguid) + ::memcpy(pguid, &mUuid, sizeof(GUID)); + return *this; + } + + /** To pass instances as OUT_GUID parameters to interface methods. */ + GUID *asOutParam() + { + return (GUID *)&mUuid; + } + +#else + + /** To assign instances to OUT_GUID parameters from within the + * interface method */ + const Guid &cloneTo(nsID **ppGuid) const + { + if (ppGuid) + *ppGuid = (nsID *)nsMemory::Clone(&mUuid, sizeof(nsID)); + + return *this; + } + + /** + * Internal helper class for asOutParam(). + * + * This takes a GUID reference in the constructor and copies the mUuid from + * the method to that instance in its destructor. + */ + class GuidOutParam + { + GuidOutParam(Guid &guid) + : ptr(0), + outer(guid) + { + outer.clear(); + } + + nsID *ptr; + Guid &outer; + GuidOutParam(const GuidOutParam &that); // disabled + GuidOutParam &operator=(const GuidOutParam &that); // disabled + public: + operator nsID**() { return &ptr; } + ~GuidOutParam() + { + if (ptr && outer.isZero()) + { + outer = *ptr; + outer.dbg_refresh(); + nsMemory::Free(ptr); + } + } + friend class Guid; + }; + + /** to pass instances as OUT_GUID parameters to interface methods */ + GuidOutParam asOutParam() { return GuidOutParam(*this); } + +#endif + + /** + * Static immutable empty (zero) object. May be used for comparison purposes. + */ + static const Guid Empty; + +private: + void makeClear() + { + ::RTUuidClear(&mUuid); + mGuidState = GUID_ZERO; + } + + void makeInvalid() + { + ::RTUuidClear(&mUuid); + mGuidState = GUID_INVALID; + } + + void updateState() + { + if (::RTUuidIsNull(&mUuid)) + mGuidState = GUID_ZERO; + else + mGuidState = GUID_NORMAL; + } + + void initString(const char *that) + { + if (!that || !*that) + { + makeClear(); + } + else + { + int rc = ::RTUuidFromStr(&mUuid, that); + if (RT_SUCCESS(rc)) + updateState(); + else + makeInvalid(); + } + dbg_refresh(); + } + + void initBSTR(CBSTR that) + { + if (!that || !*that) + { + makeClear(); + } + else + { + int rc = ::RTUuidFromUtf16(&mUuid, that); + if (RT_SUCCESS(rc)) + updateState(); + else + makeInvalid(); + } + dbg_refresh(); + } + + /** + * Refresh the debug-only UUID string. + * + * In debug code, refresh the UUID string representatino for debugging; + * must be called every time the internal uuid changes; compiles to nothing + * in release code. + */ + inline void dbg_refresh() + { +#ifdef DEBUG + switch (mGuidState) + { + case GUID_ZERO: + case GUID_NORMAL: + ::RTUuidToStr(&mUuid, mszUuid, RTUUID_STR_LENGTH); + break; + default: + ::memset(mszUuid, '\0', sizeof(mszUuid)); + ::RTStrCopy(mszUuid, sizeof(mszUuid), "INVALID"); + break; + } + m_pcszUUID = mszUuid; +#endif + } + + /** The UUID. */ + RTUUID mUuid; + + GuidState_t mGuidState; + +#ifdef DEBUG + /** String representation of mUuid for printing in the debugger. */ + char mszUuid[RTUUID_STR_LENGTH]; + /** Another string variant for the debugger, points to szUUID. */ + const char *m_pcszUUID; +#endif +}; + +} /* namespace com */ + +/** @} */ + +#endif /* !VBOX_INCLUDED_com_Guid_h */ + |