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/*++ BUILD Version: 0001
*
* WOW v1.0
*
* Copyright (c) 1991, Microsoft Corporation
*
* WMMALIAS.H
* WOW32 16-bit handle alias support
*
* History:
* Created Sept-1-1992 by Chandan Chauhan (ChandanC)
* Modified 12-May-1992 by Mike Tricker (miketri) to add MultiMedia support
--*/
/* 16-bit handle format
*
* Bits 0 and 1 are always zero (potential compatibility requirement).
* Note however that the macros below treat HASH_BITS as starting at bit
* 0, for simplicity. We just shift the alias left two bits when we're
* done. The actual number of low bits that are reserved is determined
* by RES_BITS.
*
* Of the remaining 14 bits, the next HASH_BITS bits are the hash slot #
* (relative to 0), followed by LIST_BITS bits containing the list slot #
* (relative to 1). List slot is relative to 1 because some portion of
* a valid handle must be non-zero; this is also why LIST_SLOTS contains
* that extra "-1".
*/
#define RES_BITS 2
#define HASH_BITS 6
#define HASH_SLOTS (1 << HASH_BITS)
#define HASH_MASK (HASH_SLOTS-1)
#define MASK32(h32) ((INT)(h32))
#define HASH32(h32) (MASK32(h32) & (HASH_SLOTS-1))
#define LIST_BITS (16-RES_BITS-HASH_BITS)
#define LIST_SLOTS ((1 << LIST_BITS) - 1)
#define LIST_MASK (LIST_SLOTS << HASH_BITS)
#define ALIAS_SLOTS 128 // must be a power of 2
/* Class map entry
*/
#pragma pack(2)
typedef struct _WCDM { /* wcd */
struct _WCD *pwcdNext; // pointer to next wcd entry
PSZ pszClass; // pointer to local copy of class name
VPSZ vpszMenu; // pointer to original copy of menu name, if any
HAND16 hModule16; // handle of owning module
HAND16 hInst16; // 16-bit hInstance (wndclass16.hInstance)
WORD nWindows; // # of windows in existence based on class
VPWNDPROC vpfnWndProc; // 16-bit window proc address
WORD wStyle; // Class Style bits
} WCD, *PWCD, **PPWCD;
#pragma pack()
/* Handle map entry
*/
#pragma pack(2)
typedef struct _HMAP { /* hm */
struct _HMAP *phmNext; // pointer to next hmap entry
HANDLE h32; // 32-bit handle
HAND16 h16; // 16-bit handle
HTASK16 htask16; // 16-bit handle of owning task
INT iClass; // WOW class index
DWORD dwStyle; // style flags (if handle to window)
PWCD pwcd; // WOW class data pointer
VPWNDPROC vpfnWndProc; // associated 16-bit function address
VPWNDPROC vpfnDlgProc; // 16-bit dialog function
} HMAP, *PHMAP, **PPHMAP;
#pragma pack()
/* Handle alias info
*/
typedef struct _HINFO { /* hi */
PPHMAP pphmHash; // address of hash table
#ifdef NEWALIAS
PPHMAP pphmAlias; // address of alias table
INT nAliasEntries; // size of alias table, in entries
INT iAliasHint; // next (possibly) free slot in alias table
#endif
} HINFO, *PHINFO, **PPHINFO;
PHMAP FindHMap32(HAND32 h32, PHINFO phi, INT iClass);
PHMAP FindHMap16(HAND16 h16, PHINFO phi);
VOID FreeHMap16(HAND16 h16, PHINFO phi);
PSZ GetHMapNameM(PHINFO phi, INT iClass);
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