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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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA */
#ifndef NDB_ROPE_HPP
#define NDB_ROPE_HPP
#include "DataBuffer.hpp"
typedef DataBuffer<7> RopeBase;
typedef DataBuffer<7>::DataBufferPool RopePool;
struct RopeHandle {
RopeHandle() { m_hash = 0; }
Uint32 m_hash;
RopeBase::Head m_head;
Uint32 hashValue() const { return m_hash; }
};
class ConstRope : private RopeBase {
public:
ConstRope(RopePool& thePool, const RopeHandle& handle)
: RopeBase(thePool), src(handle)
{
this->head = src.m_head;
}
~ConstRope(){
}
size_t size() const;
bool empty() const;
void copy(char* buf) const;
int compare(const char * s) const { return compare(s, strlen(s) + 1); }
int compare(const char *, size_t len) const;
private:
const RopeHandle & src;
};
class Rope : private RopeBase {
public:
Rope(RopePool& thePool, RopeHandle& handle)
: RopeBase(thePool), src(handle)
{
this->head = src.m_head;
m_hash = src.m_hash;
}
~Rope(){
src.m_head = this->head;
src.m_hash = m_hash;
}
size_t size() const;
bool empty() const;
void copy(char* buf) const;
int compare(const char * s) const { return compare(s, strlen(s) + 1); }
int compare(const char *, size_t len) const;
bool assign(const char * s) { return assign(s, strlen(s) + 1);}
bool assign(const char * s, size_t l) { return assign(s, l, hash(s, l));}
bool assign(const char *, size_t len, Uint32 hash);
void erase();
static Uint32 hash(const char * str, Uint32 len);
private:
Uint32 m_hash;
RopeHandle & src;
};
inline
size_t
Rope::size() const {
return head.used;
}
inline
bool
Rope::empty() const {
return head.used == 0;
}
inline
size_t
ConstRope::size() const {
return head.used;
}
inline
bool
ConstRope::empty() const {
return head.used == 0;
}
#endif
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