You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
141 lines
5.0 KiB
141 lines
5.0 KiB
//+---------------------------------------------------------------------------
|
|
//
|
|
// Microsoft Windows
|
|
// Copyright (C) Microsoft Corporation, 1992 - 1995.
|
|
//
|
|
// File: map_kv.h
|
|
//
|
|
// Contents:
|
|
//
|
|
// Classes:
|
|
//
|
|
// Functions:
|
|
//
|
|
// History: 10-29-1996 JohannP (Johann Posch) taken from OLE
|
|
//
|
|
//----------------------------------------------------------------------------
|
|
#ifndef __MAP_KV_H__
|
|
#define __MAP_KV_H__
|
|
|
|
typedef void FAR* POSITION;
|
|
#define BEFORE_START_POSITION ((POSITION)(ULONG_PTR)-1L)
|
|
|
|
|
|
/////////////////////////////////////////////////////////////////////////////
|
|
// class CMapKeyToValue - a mapping from 'KEY's to 'VALUE's, passed in as
|
|
// pv/cb pairs. The keys can be variable length, although we optmizize the
|
|
// case when they are all the same.
|
|
//
|
|
/////////////////////////////////////////////////////////////////////////////
|
|
|
|
STDAPI_(UINT) MKVDefaultHashKey(LPVOID pKey, UINT cbKey);
|
|
DECLARE_HANDLE(HMAPKEY);
|
|
typedef UINT (STDAPICALLTYPE FAR* LPFNHASHKEY)(LPVOID, UINT);
|
|
|
|
class FAR CMapKeyToValue
|
|
{
|
|
public:
|
|
CMapKeyToValue(UINT cbValue, UINT cbKey = 0,
|
|
int nBlockSize=10,
|
|
LPFNHASHKEY lpfnHashKey = NULL,
|
|
UINT nHashSize = 17);
|
|
~CMapKeyToValue();
|
|
|
|
// number of elements
|
|
int GetCount() const { return m_nCount; }
|
|
BOOL IsEmpty() const { return m_nCount == 0; }
|
|
|
|
// Lookup; return FALSE if not found
|
|
BOOL Lookup(LPVOID pKey, UINT cbKey, LPVOID pValue) const;
|
|
BOOL LookupHKey(HMAPKEY hKey, LPVOID pValue) const;
|
|
BOOL LookupAdd(LPVOID pKey, UINT cbKey, LPVOID pValue) const;
|
|
|
|
// add a new (key, value) pair; return FALSE if out of memory
|
|
BOOL SetAt(LPVOID pKey, UINT cbKey, LPVOID pValue);
|
|
BOOL SetAtHKey(HMAPKEY hKey, LPVOID pValue);
|
|
|
|
// removing existing (key, ?) pair; return FALSE if no such key
|
|
BOOL RemoveKey(LPVOID pKey, UINT cbKey);
|
|
BOOL RemoveHKey(HMAPKEY hKey);
|
|
void RemoveAll();
|
|
|
|
// iterating all (key, value) pairs
|
|
POSITION GetStartPosition() const
|
|
{ return (m_nCount == 0) ? (POSITION)NULL : BEFORE_START_POSITION; }
|
|
void GetNextAssoc(POSITION FAR* pNextPosition, LPVOID pKey,
|
|
UINT FAR* pcbKey, LPVOID pValue) const;
|
|
|
|
// return HMAPKEY for given key; returns NULL if not currently in map
|
|
HMAPKEY GetHKey(LPVOID pKey, UINT cbKey) const;
|
|
|
|
void AssertValid() const;
|
|
#ifndef unix
|
|
private:
|
|
#else
|
|
// If this was not made public we get complier warnings
|
|
// that CKeyWrap is not accessible from CAssoc declared below
|
|
// which means global functions cant return CNode pointers
|
|
public:
|
|
#endif /* unix */
|
|
// abstracts, somewhat, variable and fixed sized keys; size is really
|
|
// m_cbKeyInAssoc.
|
|
union CKeyWrap
|
|
{
|
|
BYTE rgbKey[sizeof(LPVOID) + sizeof(UINT)];
|
|
struct
|
|
{
|
|
LPVOID pKey;
|
|
UINT cbKey;
|
|
}
|
|
#ifdef unix
|
|
n
|
|
#endif /* unix */
|
|
;
|
|
};
|
|
// Association of one key and one value; NOTE: even though in general
|
|
// the size of the key and value varies, for any given map,
|
|
// the size of an assoc is fixed.
|
|
struct CAssoc
|
|
{
|
|
CAssoc FAR* pNext;
|
|
UINT nHashValue; // needed for efficient iteration
|
|
CKeyWrap key; // size is really m_cbKeyInAssoc
|
|
// BYTE rgbValue[m_cbValue];
|
|
};
|
|
#ifdef unix
|
|
private:
|
|
#endif /* unix */
|
|
UINT SizeAssoc() const
|
|
{ return sizeof(CAssoc)-sizeof(CKeyWrap) + m_cbKeyInAssoc + m_cbValue; }
|
|
CAssoc FAR* NewAssoc(UINT hash, LPVOID pKey, UINT cbKey, LPVOID pValue);
|
|
void FreeAssoc(CAssoc FAR* pAssoc);
|
|
BOOL CompareAssocKey(CAssoc FAR* pAssoc, LPVOID pKey, UINT cbKey) const;
|
|
CAssoc FAR* GetAssocAt(LPVOID pKey, UINT cbKey, UINT FAR& nHash) const;
|
|
|
|
BOOL SetAssocKey(CAssoc FAR* pAssoc, LPVOID pKey, UINT cbKey) const;
|
|
void GetAssocKeyPtr(CAssoc FAR* pAssoc, LPVOID FAR* ppKey,UINT FAR* pcbKey) const;
|
|
void FreeAssocKey(CAssoc FAR* pAssoc) const;
|
|
void GetAssocValuePtr(CAssoc FAR* pAssoc, LPVOID FAR* ppValue) const;
|
|
void GetAssocValue(CAssoc FAR* pAssoc, LPVOID pValue) const;
|
|
void SetAssocValue(CAssoc FAR* pAssoc, LPVOID pValue) const;
|
|
|
|
BOOL InitHashTable();
|
|
|
|
UINT m_cbValue;
|
|
UINT m_cbKey; // variable length if 0
|
|
UINT m_cbKeyInAssoc; // always non-zero
|
|
|
|
CAssoc FAR* FAR* m_pHashTable;
|
|
UINT m_nHashTableSize;
|
|
LPFNHASHKEY m_lpfnHashKey;
|
|
|
|
int m_nCount;
|
|
CAssoc FAR* m_pFreeList;
|
|
struct CPlex FAR* m_pBlocks;
|
|
int m_nBlockSize;
|
|
};
|
|
|
|
|
|
#endif // !__MAP_KV_H__
|
|
|
|
|