259 lines
7.4 KiB
C
259 lines
7.4 KiB
C
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#ifndef _MDMUtils_h
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#define _MDMUtils_h
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// File: MDMUtils.h
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// Author: Michael Marr (mikemarr)
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//
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// Description:
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// This header contains miscellaneous utility functions.
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//
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// History:
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// -@- 08/04/95 (mikemarr) - created
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// -@- 09/09/97 (mikemarr) - snarfed from d2d\d2dutils\src\mmutils.cpp
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// -@- 09/09/97 (mikemarr) - will only create code when in debug mode
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// -@- 11/12/97 (mikemarr) - added CopyDWORDAligned
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#include <stdlib.h>
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#include <stdio.h>
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#include <stddef.h>
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#include <stdarg.h>
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#include <limits.h>
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#include <memory.h>
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#define nTMPBUFSIZE 1024
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extern char g_rgchTmpBuf[nTMPBUFSIZE];
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#if defined(_WINDOWS) || defined(WIN32)
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#ifndef _INC_WINDOWS
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#define WIN32_EXTRA_LEAN
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#define WIN32_LEAN_AND_MEAN
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#include <WINDOWS.H>
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#endif
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#endif
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#ifndef NULL
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#ifdef __cplusplus
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#define NULL 0
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#else
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#define NULL ((void *)0)
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#endif
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#endif
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#ifndef FALSE
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#define FALSE false
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#endif
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#ifndef TRUE
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#define TRUE true
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#endif
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#ifndef IN
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#define IN
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#endif
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#ifndef OUT
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#define OUT
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#endif
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#ifndef INOUT
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#define INOUT
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#endif
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#ifndef BOOL
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typedef int BOOL;
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typedef BOOL far *LPBOOL;
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#endif
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#ifndef BYTE
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typedef unsigned char BYTE;
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typedef BYTE far *LPBYTE;
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#endif
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#ifndef WORD
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typedef unsigned short WORD;
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typedef WORD far *LPWORD;
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#endif
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#ifndef DWORD
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typedef unsigned long DWORD;
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typedef DWORD far *LPDWORD;
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#endif
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#ifndef LPVOID
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typedef void far *LPVOID;
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#endif
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#define maskBYTE 0xFF
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#define maskWORD 0xFFFF
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#define maskDWORD 0xFFFFFFFF
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#define maxBYTE 0xFF
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#define maxWORD 0xFFFF
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#define maxDWORD 0xFFFFFFFF
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#define chSPC ' '
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#define chTAB ' '
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#define chEOL '\0'
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#define chNULL '\0'
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#define chLINEFEED 0x0D
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#define chCARRIAGERETURN 0x0A
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#ifndef max
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#define max(a,b) (((a) > (b)) ? (a) : (b))
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#endif
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#ifndef min
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#define min(a,b) (((a) < (b)) ? (a) : (b))
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#endif
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#define MACSTART do {
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#define MACEND } while(0)
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// Macro: ISWAP
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// This macro swaps two integer registers using 3 xor's.
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// This is unsafe because a & b are not guaranteed to get 2 regs.
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#define ISWAP(a,b) MACSTART (a)^=(b); (b)^=(a); (a)^=(b); MACEND
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// Macro: PSWAP
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// This macro swaps two pointers in place using 3 xor's.
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#define PSWAP(a,b,type) MACSTART \
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a = (type *)(int(a) ^ int(b)); \
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b = (type *)(int(a) ^ int(b)); \
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a = (type *)(int(a) ^ int(b)); \
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MACEND
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#define MMINITSTRUCT(__s) memset(&(__s), 0, sizeof(__s))
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#ifndef ZERO_DXSTRUCT
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#define ZERO_DXSTRUCT(__dxstruct) MACSTART \
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MMINITSTRUCT(__dxstruct); (__dxstruct).dwSize = sizeof(__dxstruct); MACEND
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#endif
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#ifndef INIT_DXSTRUCT
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#define INIT_DXSTRUCT(__dxstruct) MACSTART \
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MMINITSTRUCT(__dxstruct); (__dxstruct).dwSize = sizeof(__dxstruct); MACEND
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#endif
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#ifdef DBG
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#define CHECK_HR(__hr) MACSTART if (FAILED(__hr)) { printf("%s(%d): CHECK_HR failed (0x%X)\n", __FILE__, __LINE__, hr); goto e_Exit; } MACEND
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#else
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#define CHECK_HR(__hr) MACSTART if (FAILED(__hr)) goto e_Exit; MACEND
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#endif
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#define CHECK_MEM(__p) MACSTART if ((__p) == NULL) { hr = E_OUTOFMEMORY; goto e_Exit; } MACEND
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#define INRANGE(x, xmin, xmax) (((x) >= (xmin)) && ((x) <= (xmax)))
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#define INARRAY(x, xmax) (((x) >= 0) && ((x) < (xmax)))
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#define SETABS(x) MACSTART if ((x) < 0) (x) = -(x); MACEND
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#define SETMAX(dst, src1, src2) MACSTART if ((src1) < (src2)) (dst) = (src2); else (dst) = (src1); MACEND
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#define SETMIN(dst, src1, src2) MACSTART if ((src1) > (src2)) (dst) = (src2); else (dst) = (src1); MACEND
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#define UPDATEMAX(dst, src) MACSTART if ((src) > (dst)) (dst) = (src); MACEND
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#define UPDATEMIN(dst, src) MACSTART if ((src) < (dst)) (dst) = (src); MACEND
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#define UPDATEMINMAX(xmin, xmax, x) MACSTART if ((x) < (xmin)) (xmin) = (x); else if ((x) > (xmax)) (xmax) = (x); MACEND
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#define CLAMPMAX(x, xmax) MACSTART if ((x) > (xmax)) (x) = (xmax); MACEND
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#define CLAMPMIN(x, xmin) MACSTART if ((x) < (xmin)) (x) = (xmin); MACEND
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#define CLAMP(x, xmin, xmax) MACSTART \
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if ((x) > (xmax)) (x) = (xmax); \
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else if ((x) < (xmin)) (x) = (xmin); \
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MACEND
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//
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// BIT MANIPULATION: BitVector
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//
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// **Hungarian Prefix: bv
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typedef unsigned int BitVector;
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#define NUMBITS(Type) (sizeof(Type) << 3)
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// Macro: MASKRANGE
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// Create a bit mask in the specified range, where the lo value is inclusive, and the
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// hi value is exclusive.
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// For example, MASKRANGE(8, 16) == 0x0000FF00.
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#define MASKRANGE(lo, hi) \
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(((((BitVector) ~0) >> (lo)) << ((lo) + (NUMBITS(BitVector) - (hi)))) >> (NUMBITS(BitVector) - (hi)))
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#define SETBIT(bv, i) ((bv) |= (((BitVector) 1) << (i)))
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#define UNSETBIT(bv, i) ((bv) &= ~(((BitVector) 1) << (i)))
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#define SETRANGE(bv, lo, hi) ((bv) |= MASKRANGE(lo, hi))
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#define UNSETRANGE(bv, lo, hi) ((bv) &= ~MASKRANGE(lo, hi))
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#define SETFLAG(_dwFlags, _flag, _b) MACSTART if (_b) _dwFlags |= _flag; else _dwFlags &= ~_flag; MACEND
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//
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// DEBUG STUFF
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//
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#ifndef __AFX_H__
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#ifdef _DEBUG
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void _MMStall(const char *szExp, const char *szFile, int nLine);
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void _MMTrace(const char *szFmt, ...);
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#define MMASSERT(exp) (void)((exp) || (_MMStall(#exp, __FILE__, __LINE__),0))
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#define MMASSERT_VALID(exp) MMASSERT(exp)
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#define MMVERIFY(exp) MMASSERT(exp)
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#define MMDEBUG_ONLY(exp) (exp)
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#define MMTRACE ::_MMTrace
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#else
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// void _MMIgnore(const char *szFmt, ...) {}
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#define MMASSERT(exp) ((void)0)
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#define MMASSERT_VALID(exp) ((void)0)
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#define MMVERIFY(exp) ((void)(exp))
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#define MMDEBUG_ONLY(exp) ((void)0)
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#define MMTRACE 1 ? (void)0 : ::printf
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#endif
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#else
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#define MMASSERT(exp) ASSERT(exp)
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#define MMASSERT_VALID(exp) ASSERT_VALID(exp)
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#define MMVERIFY(exp) VERIFY(exp)
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#define MMDEBUG_ONLY(exp) DEBUG_ONLY(exp)
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#define MMTRACE TRACE
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#endif
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// Macro: MMRELEASE
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// Safe release for COM objects
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// ***this code should never change - there is stuff that relies on the pointer being
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// set to NULL after being released
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#ifndef MMRELEASE
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#define MMRELEASE(_p) MACSTART if ((_p) != NULL) {(_p)->Release(); (_p) = NULL;} MACEND
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#endif
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#define MMDELETE(__ptr) MACSTART delete (__ptr); (__ptr) = NULL; MACEND
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#define MMDELETERG(__ptr) MACSTART delete [] (__ptr); (__ptr) = NULL; MACEND
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#define MMSETREF(_pOld, _pNew) MACSTART if (_pOld) (_pOld)->Release(); if ((_pOld) = (_pNew)) (_pOld)->AddRef(); MACEND
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#define MAKE_USERERROR(code) MAKE_HRESULT(1,FACILITY_ITF,code)
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#define E_NOTINITIALIZED MAKE_USERERROR(0xFFFC)
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#define E_ALREADYINITIALIZED MAKE_USERERROR(0xFFFB)
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#define E_NOTFOUND MAKE_USERERROR(0xFFFA)
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#define E_INSUFFICIENTDATA MAKE_USERERROR(0xFFF9)
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extern char g_szEOFMessage[];
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// Macro for memory mapped file stuff
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#define CHECKEOF(__pFilePos, __pFileLimit) MACSTART \
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if ((__pFilePos) >= (__pFileLimit)) { \
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MMTRACE(g_szEOFMessage); \
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return E_UNEXPECTED; \
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} MACEND
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void ZeroDWORDAligned(LPDWORD pdw, DWORD cEntries);
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void CopyDWORDAligned(DWORD *pdwDst, const DWORD *pdwSrc, DWORD cEntries);
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inline void
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ZeroPointers(void **ppv, DWORD cEntries)
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{
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// use a Duff-Marr machine
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void **ppvLimit = ppv;
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ppv += (cEntries & ~0x7);
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switch (cEntries & 0x7) {
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do {
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ppv -= 8;
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ppv[7] = NULL;
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case 7: ppv[6] = NULL;
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case 6: ppv[5] = NULL;
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case 5: ppv[4] = NULL;
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case 4: ppv[3] = NULL;
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case 3: ppv[2] = NULL;
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case 2: ppv[1] = NULL;
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case 1: ppv[0] = NULL;
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case 0: ;
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} while (ppv != ppvLimit);
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}
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}
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DWORD GetClosestMultipleOf4(DWORD n, bool bGreater);
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DWORD GetClosestPowerOf2(DWORD n, bool bGreater);
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#endif
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