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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; version 2 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, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */
#ifndef NDB_BITMASK_H
#define NDB_BITMASK_H
#include <ndb_global.h>
/**
* Bitmask implementation. Size is given explicitly
* (as first argument). All methods are static.
*/
class BitmaskImpl {
public:
STATIC_CONST( NotFound = (unsigned)-1 );
/**
* get - Check if bit n is set.
*/
static bool get(unsigned size, const Uint32 data[], unsigned n);
/**
* set - Set bit n to given value (true/false).
*/
static void set(unsigned size, Uint32 data[], unsigned n, bool value);
/**
* set - Set bit n.
*/
static void set(unsigned size, Uint32 data[], unsigned n);
/**
* set - Set all bits.
*/
static void set(unsigned size, Uint32 data[]);
/**
* set bit from <em>start</em> to <em>last</em>
*/
static void set_range(unsigned size, Uint32 data[], unsigned start, unsigned last);
/**
* assign - Set all bits in <em>dst</em> to corresponding in <em>src/<em>
*/
static void assign(unsigned size, Uint32 dst[], const Uint32 src[]);
/**
* clear - Clear bit n.
*/
static void clear(unsigned size, Uint32 data[], unsigned n);
/**
* clear - Clear all bits.
*/
static void clear(unsigned size, Uint32 data[]);
/**
* clear bit from <em>start</em> to <em>last</em>
*/
static void clear_range(unsigned size, Uint32 data[], unsigned start, unsigned last);
static Uint32 getWord(unsigned size, Uint32 data[], unsigned word_pos);
static void setWord(unsigned size, Uint32 data[],
unsigned word_pos, Uint32 new_word);
/**
* isclear - Check if all bits are clear. This is faster
* than checking count() == 0.
*/
static bool isclear(unsigned size, const Uint32 data[]);
/**
* count - Count number of set bits.
*/
static unsigned count(unsigned size, const Uint32 data[]);
/**
* find - Find first set bit, starting at given position.
* Returns NotFound when not found.
*/
static unsigned find(unsigned size, const Uint32 data[], unsigned n);
/**
* equal - Bitwise equal.
*/
static bool equal(unsigned size, const Uint32 data[], const Uint32 data2[]);
/**
* bitOR - Bitwise (x | y) into first operand.
*/
static void bitOR(unsigned size, Uint32 data[], const Uint32 data2[]);
/**
* bitAND - Bitwise (x & y) into first operand.
*/
static void bitAND(unsigned size, Uint32 data[], const Uint32 data2[]);
/**
* bitANDC - Bitwise (x & ~y) into first operand.
*/
static void bitANDC(unsigned size, Uint32 data[], const Uint32 data2[]);
/**
* bitXOR - Bitwise (x ^ y) into first operand.
*/
static void bitXOR(unsigned size, Uint32 data[], const Uint32 data2[]);
/**
* bitXORC - Bitwise (x ^ ~y) into first operand.
*/
static void bitXORC(unsigned size, Uint32 data[], const Uint32 data2[]);
/**
* contains - Check if all bits set in data2 are set in data
*/
static bool contains(unsigned size, Uint32 data[], const Uint32 data2[]);
/**
* overlaps - Check if any bit set in data is set in data2
*/
static bool overlaps(unsigned size, Uint32 data[], const Uint32 data2[]);
/**
* getField - Get bitfield at given position and length (max 32 bits)
*/
static Uint32 getField(unsigned size, const Uint32 data[],
unsigned pos, unsigned len);
/**
* setField - Set bitfield at given position and length (max 32 bits)
* Note : length == 0 not supported.
*/
static void setField(unsigned size, Uint32 data[],
unsigned pos, unsigned len, Uint32 val);
/**
* getField - Get bitfield at given position and length
* Note : length == 0 not supported.
*/
static void getField(unsigned size, const Uint32 data[],
unsigned pos, unsigned len, Uint32 dst[]);
/**
* setField - Set bitfield at given position and length
*/
static void setField(unsigned size, Uint32 data[],
unsigned pos, unsigned len, const Uint32 src[]);
/**
* getText - Return as hex-digits (only for debug routines).
*/
static char* getText(unsigned size, const Uint32 data[], char* buf);
private:
static void getFieldImpl(const Uint32 data[], unsigned, unsigned, Uint32 []);
static void setFieldImpl(Uint32 data[], unsigned, unsigned, const Uint32 []);
};
inline bool
BitmaskImpl::get(unsigned size, const Uint32 data[], unsigned n)
{
assert(n < (size << 5));
return (data[n >> 5] & (1 << (n & 31))) != 0;
}
inline void
BitmaskImpl::set(unsigned size, Uint32 data[], unsigned n, bool value)
{
value ? set(size, data, n) : clear(size, data, n);
}
inline void
BitmaskImpl::set(unsigned size, Uint32 data[], unsigned n)
{
assert(n < (size << 5));
data[n >> 5] |= (1 << (n & 31));
}
inline void
BitmaskImpl::set(unsigned size, Uint32 data[])
{
for (unsigned i = 0; i < size; i++) {
data[i] = ~0;
}
}
inline void
BitmaskImpl::set_range(unsigned size, Uint32 data[],
unsigned start, unsigned last)
{
Uint32 *ptr = data + (start >> 5);
Uint32 *end = data + (last >> 5);
assert(start <= last);
assert(last < (size << 5));
Uint32 tmp_word = ~(Uint32)0 << (start & 31);
if (ptr < end)
{
* ptr ++ |= tmp_word;
for(; ptr < end; )
{
* ptr ++ = ~(Uint32)0;
}
tmp_word = ~(Uint32)0;
}
tmp_word &= ~(~(Uint32)0 << (last & 31));
* ptr |= tmp_word;
}
inline void
BitmaskImpl::assign(unsigned size, Uint32 dst[], const Uint32 src[])
{
for (unsigned i = 0; i < size; i++) {
dst[i] = src[i];
}
}
inline void
BitmaskImpl::clear(unsigned size, Uint32 data[], unsigned n)
{
assert(n < (size << 5));
data[n >> 5] &= ~(1 << (n & 31));
}
inline void
BitmaskImpl::clear(unsigned size, Uint32 data[])
{
for (unsigned i = 0; i < size; i++) {
data[i] = 0;
}
}
inline void
BitmaskImpl::clear_range(unsigned size, Uint32 data[],
unsigned start, unsigned last)
{
Uint32 *ptr = data + (start >> 5);
Uint32 *end = data + (last >> 5);
assert(start <= last);
assert(last < (size << 5));
Uint32 tmp_word = ~(Uint32)0 << (start & 31);
if (ptr < end)
{
* ptr ++ &= ~tmp_word;
for(; ptr < end; )
{
* ptr ++ = 0;
}
tmp_word = ~(Uint32)0;
}
tmp_word &= ~(~(Uint32)0 << (last & 31));
* ptr &= ~tmp_word;
}
inline
Uint32
BitmaskImpl::getWord(unsigned size, Uint32 data[], unsigned word_pos)
{
return data[word_pos];
}
inline void
BitmaskImpl::setWord(unsigned size, Uint32 data[],
unsigned word_pos, Uint32 new_word)
{
data[word_pos] = new_word;
return;
}
inline bool
BitmaskImpl::isclear(unsigned size, const Uint32 data[])
{
for (unsigned i = 0; i < size; i++) {
if (data[i] != 0)
return false;
}
return true;
}
inline unsigned
BitmaskImpl::count(unsigned size, const Uint32 data[])
{
unsigned cnt = 0;
for (unsigned i = 0; i < size; i++) {
Uint32 x = data[i];
while (x) {
x &= (x - 1);
cnt++;
}
}
return cnt;
}
inline unsigned
BitmaskImpl::find(unsigned size, const Uint32 data[], unsigned n)
{
while (n < (size << 5)) { // XXX make this smarter
if (get(size, data, n)) {
return n;
}
n++;
}
return NotFound;
}
inline bool
BitmaskImpl::equal(unsigned size, const Uint32 data[], const Uint32 data2[])
{
for (unsigned i = 0; i < size; i++) {
if (data[i] != data2[i])
return false;
}
return true;
}
inline void
BitmaskImpl::bitOR(unsigned size, Uint32 data[], const Uint32 data2[])
{
for (unsigned i = 0; i < size; i++) {
data[i] |= data2[i];
}
}
inline void
BitmaskImpl::bitAND(unsigned size, Uint32 data[], const Uint32 data2[])
{
for (unsigned i = 0; i < size; i++) {
data[i] &= data2[i];
}
}
inline void
BitmaskImpl::bitANDC(unsigned size, Uint32 data[], const Uint32 data2[])
{
for (unsigned i = 0; i < size; i++) {
data[i] &= ~data2[i];
}
}
inline void
BitmaskImpl::bitXOR(unsigned size, Uint32 data[], const Uint32 data2[])
{
for (unsigned i = 0; i < size; i++) {
data[i] ^= data2[i];
}
}
inline void
BitmaskImpl::bitXORC(unsigned size, Uint32 data[], const Uint32 data2[])
{
for (unsigned i = 0; i < size; i++) {
data[i] ^= ~data2[i];
}
}
inline bool
BitmaskImpl::contains(unsigned size, Uint32 data[], const Uint32 data2[])
{
for (unsigned int i = 0; i < size; i++)
if ((data[i] & data2[i]) != data2[i])
return false;
return true;
}
inline bool
BitmaskImpl::overlaps(unsigned size, Uint32 data[], const Uint32 data2[])
{
for (unsigned int i = 0; i < size; i++)
if ((data[i] & data2[i]) != 0)
return true;
return false;
}
inline Uint32
BitmaskImpl::getField(unsigned size, const Uint32 data[],
unsigned pos, unsigned len)
{
Uint32 val = 0;
for (unsigned i = 0; i < len; i++)
val |= get(size, data, pos + i) << i;
return val;
}
inline void
BitmaskImpl::setField(unsigned size, Uint32 data[],
unsigned pos, unsigned len, Uint32 val)
{
for (unsigned i = 0; i < len; i++)
set(size, data, pos + i, val & (1 << i));
}
inline char *
BitmaskImpl::getText(unsigned size, const Uint32 data[], char* buf)
{
char * org = buf;
const char* const hex = "0123456789abcdef";
for (int i = (size-1); i >= 0; i--) {
Uint32 x = data[i];
for (unsigned j = 0; j < 8; j++) {
buf[7-j] = hex[x & 0xf];
x >>= 4;
}
buf += 8;
}
*buf = 0;
return org;
}
/**
* Bitmasks. The size is number of 32-bit words (Uint32).
* Unused bits in the last word must be zero.
*
* XXX replace size by length in bits
*/
template <unsigned size>
struct BitmaskPOD {
public:
/**
* POD data representation
*/
struct Data {
Uint32 data[size];
#if 0
Data & operator=(const BitmaskPOD<size> & src) {
src.copyto(size, data);
return *this;
}
#endif
};
private:
Data rep;
public:
STATIC_CONST( Size = size );
STATIC_CONST( NotFound = BitmaskImpl::NotFound );
STATIC_CONST( TextLength = size * 8 );
/**
* assign - Set all bits in <em>dst</em> to corresponding in <em>src/<em>
*/
void assign(const typename BitmaskPOD<size>::Data & src);
/**
* assign - Set all bits in <em>dst</em> to corresponding in <em>src/<em>
*/
static void assign(Uint32 dst[], const Uint32 src[]);
static void assign(Uint32 dst[], const BitmaskPOD<size> & src);
void assign(const BitmaskPOD<size> & src);
/**
* copy this to <em>dst</em>
*/
void copyto(unsigned sz, Uint32 dst[]) const;
/**
* assign <em>this</em> according to <em>src/em>
*/
void assign(unsigned sz, const Uint32 src[]);
/**
* get - Check if bit n is set.
*/
static bool get(const Uint32 data[], unsigned n);
bool get(unsigned n) const;
/**
* set - Set bit n to given value (true/false).
*/
static void set(Uint32 data[], unsigned n, bool value);
void set(unsigned n, bool value);
/**
* set - Set bit n.
*/
static void set(Uint32 data[], unsigned n);
void set(unsigned n);
/**
* set - set all bits.
*/
static void set(Uint32 data[]);
void set();
/**
* clear - Clear bit n.
*/
static void clear(Uint32 data[], unsigned n);
void clear(unsigned n);
/**
* clear - Clear all bits.
*/
static void clear(Uint32 data[]);
void clear();
/**
* Get and set words of bits
*/
Uint32 getWord(unsigned word_pos);
void setWord(unsigned word_pos, Uint32 new_word);
/**
* isclear - Check if all bits are clear. This is faster
* than checking count() == 0.
*/
static bool isclear(const Uint32 data[]);
bool isclear() const;
/**
* count - Count number of set bits.
*/
static unsigned count(const Uint32 data[]);
unsigned count() const;
/**
* find - Find first set bit, starting at given position.
* Returns NotFound when not found.
*/
static unsigned find(const Uint32 data[], unsigned n);
unsigned find(unsigned n) const;
/**
* equal - Bitwise equal.
*/
static bool equal(const Uint32 data[], const Uint32 data2[]);
bool equal(const BitmaskPOD<size>& mask2) const;
/**
* bitOR - Bitwise (x | y) into first operand.
*/
static void bitOR(Uint32 data[], const Uint32 data2[]);
BitmaskPOD<size>& bitOR(const BitmaskPOD<size>& mask2);
/**
* bitAND - Bitwise (x & y) into first operand.
*/
static void bitAND(Uint32 data[], const Uint32 data2[]);
BitmaskPOD<size>& bitAND(const BitmaskPOD<size>& mask2);
/**
* bitANDC - Bitwise (x & ~y) into first operand.
*/
static void bitANDC(Uint32 data[], const Uint32 data2[]);
BitmaskPOD<size>& bitANDC(const BitmaskPOD<size>& mask2);
/**
* bitXOR - Bitwise (x ^ y) into first operand.
*/
static void bitXOR(Uint32 data[], const Uint32 data2[]);
BitmaskPOD<size>& bitXOR(const BitmaskPOD<size>& mask2);
/**
* bitXORC - Bitwise (x ^ ~y) into first operand.
*/
static void bitXORC(Uint32 data[], const Uint32 data2[]);
BitmaskPOD<size>& bitXORC(const BitmaskPOD<size>& mask2);
/**
* contains - Check if all bits set in data2 (that) are also set in data (this)
*/
static bool contains(Uint32 data[], const Uint32 data2[]);
bool contains(BitmaskPOD<size> that);
/**
* overlaps - Check if any bit set in this BitmaskPOD (data) is also set in that (data2)
*/
static bool overlaps(Uint32 data[], const Uint32 data2[]);
bool overlaps(BitmaskPOD<size> that);
/**
* getText - Return as hex-digits (only for debug routines).
*/
static char* getText(const Uint32 data[], char* buf);
char* getText(char* buf) const;
};
template <unsigned size>
inline void
BitmaskPOD<size>::assign(Uint32 dst[], const Uint32 src[])
{
BitmaskImpl::assign(size, dst, src);
}
template <unsigned size>
inline void
BitmaskPOD<size>::assign(Uint32 dst[], const BitmaskPOD<size> & src)
{
BitmaskImpl::assign(size, dst, src.rep.data);
}
template <unsigned size>
inline void
BitmaskPOD<size>::assign(const typename BitmaskPOD<size>::Data & src)
{
BitmaskPOD<size>::assign(rep.data, src.data);
}
template <unsigned size>
inline void
BitmaskPOD<size>::assign(const BitmaskPOD<size> & src)
{
BitmaskPOD<size>::assign(rep.data, src.rep.data);
}
template <unsigned size>
inline void
BitmaskPOD<size>::copyto(unsigned sz, Uint32 dst[]) const
{
BitmaskImpl::assign(sz, dst, rep.data);
}
template <unsigned size>
inline void
BitmaskPOD<size>::assign(unsigned sz, const Uint32 src[])
{
BitmaskImpl::assign(sz, rep.data, src);
}
template <unsigned size>
inline bool
BitmaskPOD<size>::get(const Uint32 data[], unsigned n)
{
return BitmaskImpl::get(size, data, n);
}
template <unsigned size>
inline bool
BitmaskPOD<size>::get(unsigned n) const
{
return BitmaskPOD<size>::get(rep.data, n);
}
template <unsigned size>
inline void
BitmaskPOD<size>::set(Uint32 data[], unsigned n, bool value)
{
BitmaskImpl::set(size, data, n, value);
}
template <unsigned size>
inline void
BitmaskPOD<size>::set(unsigned n, bool value)
{
BitmaskPOD<size>::set(rep.data, n, value);
}
template <unsigned size>
inline void
BitmaskPOD<size>::set(Uint32 data[], unsigned n)
{
BitmaskImpl::set(size, data, n);
}
template <unsigned size>
inline void
BitmaskPOD<size>::set(unsigned n)
{
BitmaskPOD<size>::set(rep.data, n);
}
template <unsigned size>
inline void
BitmaskPOD<size>::set(Uint32 data[])
{
BitmaskImpl::set(size, data);
}
template <unsigned size>
inline void
BitmaskPOD<size>::set()
{
BitmaskPOD<size>::set(rep.data);
}
template <unsigned size>
inline void
BitmaskPOD<size>::clear(Uint32 data[], unsigned n)
{
BitmaskImpl::clear(size, data, n);
}
template <unsigned size>
inline void
BitmaskPOD<size>::clear(unsigned n)
{
BitmaskPOD<size>::clear(rep.data, n);
}
template <unsigned size>
inline void
BitmaskPOD<size>::clear(Uint32 data[])
{
BitmaskImpl::clear(size, data);
}
template <unsigned size>
inline void
BitmaskPOD<size>::clear()
{
BitmaskPOD<size>::clear(rep.data);
}
template <unsigned size>
inline Uint32
BitmaskPOD<size>::getWord(unsigned word_pos)
{
return BitmaskImpl::getWord(size, rep.data, word_pos);
}
template <unsigned size>
inline void
BitmaskPOD<size>::setWord(unsigned word_pos, Uint32 new_word)
{
BitmaskImpl::setWord(size, rep.data, word_pos, new_word);
}
template <unsigned size>
inline bool
BitmaskPOD<size>::isclear(const Uint32 data[])
{
return BitmaskImpl::isclear(size, data);
}
template <unsigned size>
inline bool
BitmaskPOD<size>::isclear() const
{
return BitmaskPOD<size>::isclear(rep.data);
}
template <unsigned size>
unsigned
BitmaskPOD<size>::count(const Uint32 data[])
{
return BitmaskImpl::count(size, data);
}
template <unsigned size>
inline unsigned
BitmaskPOD<size>::count() const
{
return BitmaskPOD<size>::count(rep.data);
}
template <unsigned size>
unsigned
BitmaskPOD<size>::find(const Uint32 data[], unsigned n)
{
return BitmaskImpl::find(size, data, n);
}
template <unsigned size>
inline unsigned
BitmaskPOD<size>::find(unsigned n) const
{
return BitmaskPOD<size>::find(rep.data, n);
}
template <unsigned size>
inline bool
BitmaskPOD<size>::equal(const Uint32 data[], const Uint32 data2[])
{
return BitmaskImpl::equal(size, data, data2);
}
template <unsigned size>
inline bool
BitmaskPOD<size>::equal(const BitmaskPOD<size>& mask2) const
{
return BitmaskPOD<size>::equal(rep.data, mask2.rep.data);
}
template <unsigned size>
inline void
BitmaskPOD<size>::bitOR(Uint32 data[], const Uint32 data2[])
{
BitmaskImpl::bitOR(size,data, data2);
}
template <unsigned size>
inline BitmaskPOD<size>&
BitmaskPOD<size>::bitOR(const BitmaskPOD<size>& mask2)
{
BitmaskPOD<size>::bitOR(rep.data, mask2.rep.data);
return *this;
}
template <unsigned size>
inline void
BitmaskPOD<size>::bitAND(Uint32 data[], const Uint32 data2[])
{
BitmaskImpl::bitAND(size,data, data2);
}
template <unsigned size>
inline BitmaskPOD<size>&
BitmaskPOD<size>::bitAND(const BitmaskPOD<size>& mask2)
{
BitmaskPOD<size>::bitAND(rep.data, mask2.rep.data);
return *this;
}
template <unsigned size>
inline void
BitmaskPOD<size>::bitANDC(Uint32 data[], const Uint32 data2[])
{
BitmaskImpl::bitANDC(size,data, data2);
}
template <unsigned size>
inline BitmaskPOD<size>&
BitmaskPOD<size>::bitANDC(const BitmaskPOD<size>& mask2)
{
BitmaskPOD<size>::bitANDC(rep.data, mask2.rep.data);
return *this;
}
template <unsigned size>
inline void
BitmaskPOD<size>::bitXOR(Uint32 data[], const Uint32 data2[])
{
BitmaskImpl::bitXOR(size,data, data2);
}
template <unsigned size>
inline BitmaskPOD<size>&
BitmaskPOD<size>::bitXOR(const BitmaskPOD<size>& mask2)
{
BitmaskPOD<size>::bitXOR(rep.data, mask2.rep.data);
return *this;
}
template <unsigned size>
inline void
BitmaskPOD<size>::bitXORC(Uint32 data[], const Uint32 data2[])
{
BitmaskImpl::bitXORC(size,data, data2);
}
template <unsigned size>
inline BitmaskPOD<size>&
BitmaskPOD<size>::bitXORC(const BitmaskPOD<size>& mask2)
{
BitmaskPOD<size>::bitXORC(rep.data, mask2.rep.data);
return *this;
}
template <unsigned size>
char *
BitmaskPOD<size>::getText(const Uint32 data[], char* buf)
{
return BitmaskImpl::getText(size, data, buf);
}
template <unsigned size>
inline char *
BitmaskPOD<size>::getText(char* buf) const
{
return BitmaskPOD<size>::getText(rep.data, buf);
}
template <unsigned size>
inline bool
BitmaskPOD<size>::contains(Uint32 data[], const Uint32 data2[])
{
return BitmaskImpl::contains(size, data, data2);
}
template <unsigned size>
inline bool
BitmaskPOD<size>::contains(BitmaskPOD<size> that)
{
return BitmaskPOD<size>::contains(this->rep.data, that.rep.data);
}
template <unsigned size>
inline bool
BitmaskPOD<size>::overlaps(Uint32 data[], const Uint32 data2[])
{
return BitmaskImpl::overlaps(size, data, data2);
}
template <unsigned size>
inline bool
BitmaskPOD<size>::overlaps(BitmaskPOD<size> that)
{
return BitmaskPOD<size>::overlaps(this->rep.data, that.rep.data);
}
template <unsigned size>
class Bitmask : public BitmaskPOD<size> {
public:
Bitmask() { this->clear();}
};
inline void
BitmaskImpl::getField(unsigned size, const Uint32 src[],
unsigned pos, unsigned len, Uint32 dst[])
{
assert(pos + len <= (size << 5));
assert (len != 0);
if (len == 0)
return;
src += (pos >> 5);
Uint32 offset = pos & 31;
* dst = (* src >> offset) & (len >= 32 ? ~0 : (1 << len) - 1);
if(offset + len <= 32)
{
return;
}
Uint32 used = (32 - offset);
assert(len > used);
getFieldImpl(src+1, used & 31, len-used, dst+(used >> 5));
}
inline void
BitmaskImpl::setField(unsigned size, Uint32 dst[],
unsigned pos, unsigned len, const Uint32 src[])
{
assert(pos + len <= (size << 5));
assert(len != 0);
if (len == 0)
return;
dst += (pos >> 5);
Uint32 offset = pos & 31;
Uint32 mask = (len >= 32 ? ~0 : (1 << len) - 1) << offset;
* dst = (* dst & ~mask) | ((*src << offset) & mask);
if(offset + len <= 32)
{
return;
}
Uint32 used = (32 - offset);
assert(len > used);
setFieldImpl(dst+1, used & 31, len-used, src+(used >> 5));
}
#endif
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