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Diffstat (limited to 'comphelper/source/misc/anytohash.cxx')
| -rw-r--r-- | comphelper/source/misc/anytohash.cxx | 210 |
1 files changed, 210 insertions, 0 deletions
diff --git a/comphelper/source/misc/anytohash.cxx b/comphelper/source/misc/anytohash.cxx new file mode 100644 index 000000000..4e97ea124 --- /dev/null +++ b/comphelper/source/misc/anytohash.cxx @@ -0,0 +1,210 @@ +/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */ +/* + * This file is part of the LibreOffice project. + * + * This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, You can obtain one at http://mozilla.org/MPL/2.0/. + * + * This file incorporates work covered by the following license notice: + * + * Licensed to the Apache Software Foundation (ASF) under one or more + * contributor license agreements. See the NOTICE file distributed + * with this work for additional information regarding copyright + * ownership. The ASF licenses this file to you under the Apache + * License, Version 2.0 (the "License"); you may not use this file + * except in compliance with the License. You may obtain a copy of + * the License at http://www.apache.org/licenses/LICENSE-2.0 . + */ + + +#include <comphelper/anytohash.hxx> + +#include <o3tl/hash_combine.hxx> +#include <typelib/typedescription.hxx> + +#include <com/sun/star/uno/Sequence.hxx> + +#include "typedescriptionref.hxx" + +using namespace ::com::sun::star; +using ::com::sun::star::uno::TypeDescription; +using ::comphelper::detail::TypeDescriptionRef; + +namespace comphelper { +namespace { + +std::optional<size_t> hashValue( size_t hash, + void const * val, typelib_TypeDescriptionReference * typeRef ) +{ + o3tl::hash_combine( hash, typeRef->eTypeClass ); + if (typeRef->eTypeClass == typelib_TypeClass_VOID) { + return hash; + } + assert(val != nullptr); + + switch (typeRef->eTypeClass) { + case typelib_TypeClass_INTERFACE: { + return std::nullopt; // not implemented + } + case typelib_TypeClass_STRUCT: + case typelib_TypeClass_EXCEPTION: { + TypeDescription typeDescr( typeRef ); + if (!typeDescr.is()) + typeDescr.makeComplete(); + if (!typeDescr.is()) + return std::nullopt; + + typelib_CompoundTypeDescription * compType = + reinterpret_cast< typelib_CompoundTypeDescription * >( + typeDescr.get() ); + sal_Int32 nDescr = compType->nMembers; + + if (compType->pBaseTypeDescription) { + std::optional<size_t> tmpHash = hashValue( + hash, val, reinterpret_cast< + typelib_TypeDescription * >( + compType->pBaseTypeDescription)->pWeakRef); + if(!tmpHash.has_value()) + return std::nullopt; + hash = *tmpHash; + } + + typelib_TypeDescriptionReference ** ppTypeRefs = + compType->ppTypeRefs; + sal_Int32 * memberOffsets = compType->pMemberOffsets; + + for ( sal_Int32 nPos = 0; nPos < nDescr; ++nPos ) + { + TypeDescriptionRef memberType( ppTypeRefs[ nPos ] ); + if (!memberType.is()) + return std::nullopt; + + std::optional<size_t> tmpHash = hashValue( hash, + static_cast< char const * >( + val ) + memberOffsets[ nPos ], + memberType->pWeakRef ); + if(!tmpHash.has_value()) + return std::nullopt; + hash = *tmpHash; + } + break; + } + case typelib_TypeClass_SEQUENCE: { + TypeDescriptionRef typeDescr( typeRef ); + if (!typeDescr.is()) + return std::nullopt; + + typelib_TypeDescriptionReference * elementTypeRef = + reinterpret_cast< + typelib_IndirectTypeDescription * >(typeDescr.get())->pType; + TypeDescriptionRef elementTypeDescr( elementTypeRef ); + if (!elementTypeDescr.is()) + return std::nullopt; + + sal_Int32 nElementSize = elementTypeDescr->nSize; + uno_Sequence * seq = + *static_cast< uno_Sequence * const * >(val); + sal_Int32 nElements = seq->nElements; + + if (nElements > 0) + { + char const * pElements = seq->elements; + for ( sal_Int32 nPos = 0; nPos < nElements; ++nPos ) + { + std::optional<size_t> tmpHash = hashValue( hash, + pElements + (nElementSize * nPos), + elementTypeDescr->pWeakRef ); + if(!tmpHash.has_value()) + return std::nullopt; + hash = *tmpHash; + } + } + break; + } + case typelib_TypeClass_ANY: { + uno_Any const * pAny = static_cast< uno_Any const * >(val); + return hashValue( hash, pAny->pData, pAny->pType ); + } + case typelib_TypeClass_TYPE: { + OUString const & str = OUString::unacquired( + &(*static_cast< + typelib_TypeDescriptionReference * const * >(val) + )->pTypeName ); + o3tl::hash_combine( hash, str.hashCode() ); + break; + } + case typelib_TypeClass_STRING: { + OUString const & str = OUString::unacquired( + static_cast< rtl_uString * const * >(val) ); + o3tl::hash_combine( hash, str.hashCode() ); + break; + } + case typelib_TypeClass_ENUM: { + TypeDescription typeDescr( typeRef ); + if (!typeDescr.is()) + typeDescr.makeComplete(); + if (!typeDescr.is()) + return std::nullopt; + + o3tl::hash_combine( hash, *static_cast< int const * >(val)); + break; + } + case typelib_TypeClass_BOOLEAN: + if (*static_cast< sal_Bool const * >(val)) + o3tl::hash_combine( hash, true ); + else + o3tl::hash_combine( hash, false ); + break; + case typelib_TypeClass_CHAR: { + o3tl::hash_combine( hash, *static_cast< sal_Unicode const * >(val)); + break; + } + case typelib_TypeClass_FLOAT: + o3tl::hash_combine( hash, *static_cast< float const * >(val) ); + break; + case typelib_TypeClass_DOUBLE: + o3tl::hash_combine( hash, *static_cast< double const * >(val) ); + break; + case typelib_TypeClass_BYTE: + o3tl::hash_combine( hash, *static_cast< sal_Int8 const * >(val) ); + break; + case typelib_TypeClass_SHORT: + o3tl::hash_combine( hash, *static_cast< sal_Int16 const * >(val) ); + break; + case typelib_TypeClass_UNSIGNED_SHORT: + o3tl::hash_combine( hash, *static_cast< sal_uInt16 const * >(val) ); + break; + case typelib_TypeClass_LONG: + o3tl::hash_combine( hash, *static_cast< sal_Int32 const * >(val) ); + break; + case typelib_TypeClass_UNSIGNED_LONG: + o3tl::hash_combine( hash, *static_cast< sal_uInt32 const * >(val) ); + break; + case typelib_TypeClass_HYPER: + o3tl::hash_combine( hash, *static_cast< sal_Int64 const * >(val) ); + break; + case typelib_TypeClass_UNSIGNED_HYPER: + o3tl::hash_combine( hash, *static_cast< sal_uInt64 const * >(val) ); + break; +// case typelib_TypeClass_UNKNOWN: +// case typelib_TypeClass_SERVICE: +// case typelib_TypeClass_MODULE: + default: + return std::nullopt; + } + return hash; +} + +} // anon namespace + + +std::optional<size_t> anyToHash( uno::Any const & value ) +{ + size_t hash = 0; + return hashValue( hash, value.getValue(), value.getValueTypeRef()); +} + +} // namespace comphelper + +/* vim:set shiftwidth=4 softtabstop=4 expandtab: */ |