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/* Copyright (C) 2003 MySQL AB
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; either version 2 of the License, or
(at your option) any later version.
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, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */
#ifndef ATTRIBUTE_DESCRIPTOR_HPP
#define ATTRIBUTE_DESCRIPTOR_HPP
class AttributeDescriptor {
friend class Dbdict;
friend class Dbtup;
friend class Dbtux;
private:
static void setType(Uint32 &, Uint32 type);
static void setSize(Uint32 &, Uint32 size);
static void setArray(Uint32 &, Uint32 arraySize);
static void setOriginal(Uint32 &, Uint32 original);
static void setNullable(Uint32 &, Uint32 nullable);
static void setDGroup(Uint32 &, Uint32 dgroup);
static void setDKey(Uint32 &, Uint32 dkey);
static void setPrimaryKey(Uint32 &, Uint32 dkey);
static void setStoredInTup(Uint32 &, Uint32 storedInTup);
static void setDynamic(Uint32 &, Uint32 dynamicInd);
static Uint32 getType(const Uint32 &);
static Uint32 getSize(const Uint32 &);
static Uint32 getSizeInWords(const Uint32 &);
static Uint32 getArrayType(const Uint32 &);
static Uint32 getArraySize(const Uint32 &);
static Uint32 getOriginal(const Uint32 &);
static Uint32 getNullable(const Uint32 &);
static Uint32 getDGroup(const Uint32 &);
static Uint32 getDKey(const Uint32 &);
static Uint32 getPrimaryKey(const Uint32 &);
static Uint32 getStoredInTup(const Uint32 &);
static Uint32 getDynamic(const Uint32 &);
};
/**
*
* a = Array type - 2 Bits -> Max 3 (Bit 0-1)
* t = Attribute type - 2 Bits -> Max 3 (Bit 2-3)
* s = Attribute size - 3 Bits -> Max 7 (Bit 4-6)
* o = Original attribute - 1 Bit 7
* n = Nullable - 1 Bit 8
* ? = Stored in tup - 1 Bit 9
* d = Disk based - 1 Bit 10
* g = Distribution Group Ind- 1 Bit 11
* k = Distribution Key Ind - 1 Bit 12
* r = Distribution group sz - 1 Bit 13
* p = Primary key attribute - 1 Bit 14
* y = Dynamic attribute - 1 Bit 15
* z = Array size - 16 Bits -> Max 65535 (Bit 16-31)
*
* 1111111111222222222233
* 01234567890123456789012345678901
* aattsss n dgkrpyzzzzzzzzzzzzzzzz
*
*/
#define AD_ARRAY_TYPE_SHIFT (0)
#define AD_ARRAY_TYPE_MASK (3)
#define AD_TYPE_SHIFT (2)
#define AD_TYPE_MASK (3)
#define AD_SIZE_SHIFT (4)
#define AD_SIZE_MASK (7)
#define AD_SIZE_IN_WORDS_OFFSET (31)
#define AD_SIZE_IN_WORDS_SHIFT (5)
#define AD_ORIGINAL_SHIFT (8)
#define AD_NULLABLE_SHIFT (8)
#define AD_TUP_STORED_SHIFT (9)
#define AD_DISTR_GROUP_SHIFT (11)
#define AD_DISTR_KEY_SHIFT (12)
#define AD_DISTR_GROUP_SZ (13)
#define AD_PRIMARY_KEY (14)
#define AD_DYNAMIC (15)
#define AD_ARRAY_SIZE_SHIFT (16)
#define AD_ARRAY_SIZE_MASK (65535)
inline
void
AttributeDescriptor::setType(Uint32 & desc, Uint32 type){
ASSERT_MAX(type, AD_TYPE_MASK, "AttributeDescriptor::setType");
desc |= (type << AD_TYPE_SHIFT);
}
inline
void
AttributeDescriptor::setSize(Uint32 & desc, Uint32 size){
ASSERT_MAX(size, AD_SIZE_MASK, "AttributeDescriptor::setSize");
desc |= (size << AD_SIZE_SHIFT);
}
inline
void
AttributeDescriptor::setArray(Uint32 & desc, Uint32 size){
ASSERT_MAX(size, AD_ARRAY_SIZE_MASK, "AttributeDescriptor::setArray");
desc |= (size << AD_ARRAY_SIZE_SHIFT);
if(size <= 1){
desc |= (size << AD_ARRAY_TYPE_SHIFT);
} else {
desc |= (2 << AD_ARRAY_TYPE_SHIFT);
}
}
inline
void
AttributeDescriptor::setNullable(Uint32 & desc, Uint32 nullable){
ASSERT_BOOL(nullable, "AttributeDescriptor::setNullable");
desc |= (nullable << AD_NULLABLE_SHIFT);
}
inline
void
AttributeDescriptor::setOriginal(Uint32 & desc, Uint32 original){
ASSERT_BOOL(original, "AttributeDescriptor::setOriginal");
desc |= (original << AD_ORIGINAL_SHIFT);
}
inline
void
AttributeDescriptor::setDGroup(Uint32 & desc, Uint32 dgroup){
ASSERT_BOOL(dgroup, "AttributeDescriptor::setDGroup");
desc |= (dgroup << AD_DISTR_GROUP_SHIFT);
}
inline
void
AttributeDescriptor::setDKey(Uint32 & desc, Uint32 dkey){
ASSERT_BOOL(dkey, "AttributeDescriptor::setDKey");
desc |= (dkey << AD_DISTR_KEY_SHIFT);
}
inline
void
AttributeDescriptor::setPrimaryKey(Uint32 & desc, Uint32 dkey){
ASSERT_BOOL(dkey, "AttributeDescriptor::setPrimaryKey");
desc |= (dkey << AD_PRIMARY_KEY);
}
inline
void
AttributeDescriptor::setStoredInTup(Uint32 & desc, Uint32 storedInTup){
ASSERT_BOOL(storedInTup, "AttributeDescriptor::setStoredInTup");
desc |= (storedInTup << AD_TUP_STORED_SHIFT);
}
inline
void
AttributeDescriptor::setDynamic(Uint32 & desc, Uint32 dynamic){
ASSERT_BOOL(dynamic, "AttributeDescriptor::setDynamic");
desc |= (dynamic << AD_DYNAMIC);
}
/**
* Getters
*/
inline
Uint32
AttributeDescriptor::getType(const Uint32 & desc){
return (desc >> AD_TYPE_SHIFT) & AD_TYPE_MASK;
}
inline
Uint32
AttributeDescriptor::getSize(const Uint32 & desc){
return (desc >> AD_SIZE_SHIFT) & AD_SIZE_MASK;
}
inline
Uint32
AttributeDescriptor::getSizeInWords(const Uint32 & desc){
return ((getArraySize(desc) << getSize(desc))
+ AD_SIZE_IN_WORDS_OFFSET)
>> AD_SIZE_IN_WORDS_SHIFT;
}
inline
Uint32
AttributeDescriptor::getArrayType(const Uint32 & desc){
return (desc >> AD_ARRAY_TYPE_SHIFT) & AD_ARRAY_TYPE_MASK;
}
inline
Uint32
AttributeDescriptor::getArraySize(const Uint32 & desc){
return (desc >> AD_ARRAY_SIZE_SHIFT) & AD_ARRAY_SIZE_MASK;
}
inline
Uint32
AttributeDescriptor::getNullable(const Uint32 & desc){
return (desc >> AD_NULLABLE_SHIFT) & 1;
}
inline
Uint32
AttributeDescriptor::getOriginal(const Uint32 & desc){
return (desc >> AD_ORIGINAL_SHIFT) & 1;
}
inline
Uint32
AttributeDescriptor::getDGroup(const Uint32 & desc){
return (desc >> AD_DISTR_GROUP_SHIFT) & 1;
}
inline
Uint32
AttributeDescriptor::getDKey(const Uint32 & desc){
return (desc >> AD_DISTR_KEY_SHIFT) & 1;
}
inline
Uint32
AttributeDescriptor::getPrimaryKey(const Uint32 & desc){
return (desc >> AD_PRIMARY_KEY) & 1;
}
inline
Uint32
AttributeDescriptor::getDynamic(const Uint32 & desc){
return (desc >> AD_DYNAMIC) & 1;
}
inline
Uint32
AttributeDescriptor::getStoredInTup(const Uint32 & desc){
return (desc >> AD_TUP_STORED_SHIFT) & 1;
}
#endif
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