mirror of
https://github.com/MariaDB/server.git
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250 lines
6.6 KiB
C++
250 lines
6.6 KiB
C++
/* Copyright (C) 2003 MySQL AB
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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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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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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#ifndef ATTRIBUTE_DESCRIPTOR_HPP
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#define ATTRIBUTE_DESCRIPTOR_HPP
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class AttributeDescriptor {
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friend class Dbdict;
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friend class Dbtup;
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friend class Dbtux;
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private:
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static void setType(Uint32 &, Uint32 type);
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static void setSize(Uint32 &, Uint32 size);
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static void setArray(Uint32 &, Uint32 arraySize);
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static void setOriginal(Uint32 &, Uint32 original);
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static void setNullable(Uint32 &, Uint32 nullable);
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static void setDGroup(Uint32 &, Uint32 dgroup);
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static void setDKey(Uint32 &, Uint32 dkey);
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static void setPrimaryKey(Uint32 &, Uint32 dkey);
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static void setStoredInTup(Uint32 &, Uint32 storedInTup);
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static void setDynamic(Uint32 &, Uint32 dynamicInd);
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static Uint32 getType(const Uint32 &);
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static Uint32 getSize(const Uint32 &);
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static Uint32 getSizeInWords(const Uint32 &);
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static Uint32 getArrayType(const Uint32 &);
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static Uint32 getArraySize(const Uint32 &);
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static Uint32 getOriginal(const Uint32 &);
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static Uint32 getNullable(const Uint32 &);
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static Uint32 getDGroup(const Uint32 &);
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static Uint32 getDKey(const Uint32 &);
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static Uint32 getPrimaryKey(const Uint32 &);
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static Uint32 getStoredInTup(const Uint32 &);
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static Uint32 getDynamic(const Uint32 &);
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};
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/**
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*
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* a = Array type - 2 Bits -> Max 3 (Bit 0-1)
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* t = Attribute type - 2 Bits -> Max 3 (Bit 2-3)
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* s = Attribute size - 3 Bits -> Max 7 (Bit 4-6)
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* o = Original attribute - 1 Bit 7
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* n = Nullable - 1 Bit 8
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* ? = Stored in tup - 1 Bit 9
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* d = Disk based - 1 Bit 10
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* g = Distribution Group Ind- 1 Bit 11
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* k = Distribution Key Ind - 1 Bit 12
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* r = Distribution group sz - 1 Bit 13
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* p = Primary key attribute - 1 Bit 14
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* y = Dynamic attribute - 1 Bit 15
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* z = Array size - 16 Bits -> Max 65535 (Bit 16-31)
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*
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* 1111111111222222222233
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* 01234567890123456789012345678901
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* aattsss n dgkrpyzzzzzzzzzzzzzzzz
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*
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*/
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#define AD_ARRAY_TYPE_SHIFT (0)
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#define AD_ARRAY_TYPE_MASK (3)
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#define AD_TYPE_SHIFT (2)
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#define AD_TYPE_MASK (3)
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#define AD_SIZE_SHIFT (4)
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#define AD_SIZE_MASK (7)
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#define AD_SIZE_IN_WORDS_OFFSET (31)
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#define AD_SIZE_IN_WORDS_SHIFT (5)
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#define AD_ORIGINAL_SHIFT (8)
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#define AD_NULLABLE_SHIFT (8)
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#define AD_TUP_STORED_SHIFT (9)
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#define AD_DISTR_GROUP_SHIFT (11)
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#define AD_DISTR_KEY_SHIFT (12)
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#define AD_DISTR_GROUP_SZ (13)
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#define AD_PRIMARY_KEY (14)
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#define AD_DYNAMIC (15)
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#define AD_ARRAY_SIZE_SHIFT (16)
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#define AD_ARRAY_SIZE_MASK (65535)
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inline
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void
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AttributeDescriptor::setType(Uint32 & desc, Uint32 type){
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ASSERT_MAX(type, AD_TYPE_MASK, "AttributeDescriptor::setType");
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desc |= (type << AD_TYPE_SHIFT);
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}
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inline
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void
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AttributeDescriptor::setSize(Uint32 & desc, Uint32 size){
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ASSERT_MAX(size, AD_SIZE_MASK, "AttributeDescriptor::setSize");
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desc |= (size << AD_SIZE_SHIFT);
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}
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inline
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void
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AttributeDescriptor::setArray(Uint32 & desc, Uint32 size){
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ASSERT_MAX(size, AD_ARRAY_SIZE_MASK, "AttributeDescriptor::setArray");
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desc |= (size << AD_ARRAY_SIZE_SHIFT);
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if(size <= 1){
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desc |= (size << AD_ARRAY_TYPE_SHIFT);
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} else {
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desc |= (2 << AD_ARRAY_TYPE_SHIFT);
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}
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}
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inline
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void
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AttributeDescriptor::setNullable(Uint32 & desc, Uint32 nullable){
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ASSERT_BOOL(nullable, "AttributeDescriptor::setNullable");
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desc |= (nullable << AD_NULLABLE_SHIFT);
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}
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inline
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void
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AttributeDescriptor::setOriginal(Uint32 & desc, Uint32 original){
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ASSERT_BOOL(original, "AttributeDescriptor::setOriginal");
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desc |= (original << AD_ORIGINAL_SHIFT);
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}
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inline
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void
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AttributeDescriptor::setDGroup(Uint32 & desc, Uint32 dgroup){
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ASSERT_BOOL(dgroup, "AttributeDescriptor::setDGroup");
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desc |= (dgroup << AD_DISTR_GROUP_SHIFT);
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}
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inline
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void
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AttributeDescriptor::setDKey(Uint32 & desc, Uint32 dkey){
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ASSERT_BOOL(dkey, "AttributeDescriptor::setDKey");
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desc |= (dkey << AD_DISTR_KEY_SHIFT);
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}
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inline
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void
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AttributeDescriptor::setPrimaryKey(Uint32 & desc, Uint32 dkey){
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ASSERT_BOOL(dkey, "AttributeDescriptor::setPrimaryKey");
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desc |= (dkey << AD_PRIMARY_KEY);
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}
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inline
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void
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AttributeDescriptor::setStoredInTup(Uint32 & desc, Uint32 storedInTup){
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ASSERT_BOOL(storedInTup, "AttributeDescriptor::setStoredInTup");
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desc |= (storedInTup << AD_TUP_STORED_SHIFT);
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}
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inline
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void
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AttributeDescriptor::setDynamic(Uint32 & desc, Uint32 dynamic){
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ASSERT_BOOL(dynamic, "AttributeDescriptor::setDynamic");
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desc |= (dynamic << AD_DYNAMIC);
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}
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/**
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* Getters
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*/
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inline
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Uint32
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AttributeDescriptor::getType(const Uint32 & desc){
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return (desc >> AD_TYPE_SHIFT) & AD_TYPE_MASK;
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}
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inline
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Uint32
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AttributeDescriptor::getSize(const Uint32 & desc){
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return (desc >> AD_SIZE_SHIFT) & AD_SIZE_MASK;
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}
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inline
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Uint32
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AttributeDescriptor::getSizeInWords(const Uint32 & desc){
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return ((getArraySize(desc) << getSize(desc))
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+ AD_SIZE_IN_WORDS_OFFSET)
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>> AD_SIZE_IN_WORDS_SHIFT;
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}
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inline
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Uint32
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AttributeDescriptor::getArrayType(const Uint32 & desc){
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return (desc >> AD_ARRAY_TYPE_SHIFT) & AD_ARRAY_TYPE_MASK;
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}
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inline
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Uint32
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AttributeDescriptor::getArraySize(const Uint32 & desc){
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return (desc >> AD_ARRAY_SIZE_SHIFT) & AD_ARRAY_SIZE_MASK;
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}
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inline
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Uint32
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AttributeDescriptor::getNullable(const Uint32 & desc){
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return (desc >> AD_NULLABLE_SHIFT) & 1;
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}
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inline
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Uint32
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AttributeDescriptor::getOriginal(const Uint32 & desc){
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return (desc >> AD_ORIGINAL_SHIFT) & 1;
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}
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inline
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Uint32
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AttributeDescriptor::getDGroup(const Uint32 & desc){
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return (desc >> AD_DISTR_GROUP_SHIFT) & 1;
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}
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inline
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Uint32
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AttributeDescriptor::getDKey(const Uint32 & desc){
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return (desc >> AD_DISTR_KEY_SHIFT) & 1;
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}
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inline
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Uint32
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AttributeDescriptor::getPrimaryKey(const Uint32 & desc){
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return (desc >> AD_PRIMARY_KEY) & 1;
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}
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inline
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Uint32
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AttributeDescriptor::getDynamic(const Uint32 & desc){
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return (desc >> AD_DYNAMIC) & 1;
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}
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inline
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Uint32
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AttributeDescriptor::getStoredInTup(const Uint32 & desc){
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return (desc >> AD_TUP_STORED_SHIFT) & 1;
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}
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#endif
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