svn-gvsig-desktop / trunk / libraries / libjni-ecwcompress / include / NCSMisc.h @ 1937
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/********************************************************
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** Copyright 1999 Earth Resource Mapping Pty Ltd.
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** This document contains unpublished source code of
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** Earth Resource Mapping Pty Ltd. This notice does
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** not indicate any intention to publish the source
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** code contained herein.
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**
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** FILE: NCSMisc.h
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** CREATED: Wed Oct 13 09:19:00 WST 1999
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** AUTHOR: David Hayward
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** PURPOSE: Miscellaneous prototypes of useful functions
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** for the public SDKs.
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**
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** NOTE: Must be kept in sync with the private
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** includes.
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**
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** EDITS:
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*******************************************************/
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#ifndef NCSMISC_H
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#define NCSMISC_H
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#include <math.h> |
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#ifdef __cplusplus
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extern "C" { |
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#endif
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#ifndef NCSDEFS_H
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#include "NCSDefs.h" |
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#endif
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#ifdef _WIN32_WCE
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#define NCSMin MIN
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#define NCSMax MAX
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#else
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#define NCSMin min
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#define NCSMax max
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#endif // _WIN32_WCE |
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typedef enum { |
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NCS_UNKNOWN = 0, /* Don't know what this platform is */ |
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NCS_WINDOWS_9X = 1, /* Windows 9x (95, 98) */ |
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NCS_WINDOWS_NT = 2, /* Windows NT (NT4, 2000) */ |
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NCS_WINDOWS_CE = 3, /* Windows CE (CE, PocketPC) */ |
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NCS_MACINTOSH = 4, /* Macintosh (Sys 8/9) */ |
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NCS_MACINTOSH_OSX= 5, /* Macintosh OSX */ |
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NCS_LINUX = 6, /* Linux */ |
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NCS_PALM = 7, /* PalmOS (v2+) */ |
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NCS_SOLARIS = 8, /* Solaris 2.5+ */ |
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NCS_HPUX = 9, /* HP-UX 11.0(64bit) */ |
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} NCSPlatform; |
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void NCSFormatSizeText(INT64 nSizeBytes, char *buf); |
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NCSPlatform NCSGetPlatform(void);
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/*
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** [06] Fast Float to UINT8 conversion logic
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*/
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#if (defined(WIN32) && defined(_X86_))
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#define FLT_TO_INT_INIT() { unsigned int old_controlfp_val = _controlfp(_RC_NEAR, _MCW_RC) |
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#define FLT_TO_INT_INIT_FLR() { unsigned int old_controlfp_val = _controlfp(_RC_DOWN, _MCW_RC) |
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#define FLT_TO_INT_FINI() _controlfp(old_controlfp_val, _MCW_RC); }
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#define FLT_TO_UINT8(a, b) \
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{ \
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INT32 FLT_TO_INT_rval; \ |
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__asm \ |
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{ \
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__asm fld dword ptr [b] \ |
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__asm fistp dword ptr [FLT_TO_INT_rval] \ |
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} \ |
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a = FLT_TO_INT_rval; \ |
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} |
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#define FLT_TO_INT32(a, b) \
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__asm \ |
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{ \
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__asm fld dword ptr [b] \ |
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__asm fistp dword ptr [a] \ |
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} |
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#else /* WIN32 && _X86_ */ |
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#define FLT_TO_INT_INIT() {
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#define FLT_TO_INT_FINI() }
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#ifdef MACINTOSH /**[16]**/ |
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#define FLT_TO_INT32(a,b) a = rint(b)
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//#define FLT_TO_UINT8(a, b) a = (UINT8) b
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// rar (24-1-01): added from ECW mac port
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#define FLT_TO_UINT8(a,b) \
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{ \
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UINT32 _x; \ |
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FLT_TO_INT32(_x,b); \ |
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a = (UINT8)_x; \ |
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} |
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#else /* MACINTOSH */ |
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#define FLT_TO_UINT8(a, b) \
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{ a = (UINT8) b; }
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#define FLT_TO_INT32(a,b) \
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{ a = (INT32) b; }
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#endif /* MACINTOSH */ |
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#endif /* WIN32 && _X86_ */ |
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#ifndef MACOSX
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#define NCS_INLINE_FUNCS
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#ifdef NCS_INLINE_FUNCS
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#if (defined(WIN32) && defined(_X86_))
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static NCS_INLINE INT32 NCSfloatToInt32_RM(IEEE4 f) {
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INT32 i32; |
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FLT_TO_INT32(i32, f); |
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return(i32);
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} |
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// Convert a float between 0.0 and 1.0 to an INT32
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static NCS_INLINE INT32 NCSfloatToInt32_0_1(IEEE4 x)
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{
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IEEE4 y = x + 1.f;
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return((*(INT32 *)&y) & 0x7FFFFF); // last 23 bits |
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} |
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// Convert a float to an INT32
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static NCS_INLINE INT32 NCSfloatToInt32(IEEE4 x)
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{
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INT32 FltInt = *(INT32 *)&x; |
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INT32 MyInt; |
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INT32 mantissa = (FltInt & 0x07fffff) | 0x800000; |
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INT32 exponent = 150 - ((FltInt >> 23) & 0xff); |
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if (exponent < -(8*(int)sizeof(mantissa)-1)) { |
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MyInt = (mantissa << (8*(int)sizeof(mantissa)-1)); |
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} else if(exponent < 0) { |
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MyInt = (mantissa << -exponent); |
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} else if(exponent > (8*(int)sizeof(mantissa)-1)) { |
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MyInt = (mantissa >> (8*(int)sizeof(mantissa)-1)); |
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} else {
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MyInt = (mantissa >> exponent); |
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} |
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if (FltInt & 0x80000000) |
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MyInt = -MyInt; |
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return(MyInt);
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} |
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// Convert a double to an INT32
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static NCS_INLINE INT32 NCSdoubleToInt32(IEEE8 x)
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{
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INT64 DblInt = *(INT64 *)&x; |
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INT32 MyInt; |
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INT64 mantissa = (DblInt & 0xfffffffffffff) | 0x10000000000000; |
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INT32 exponent = (INT32)(1075 - ((DblInt >> 52) & 0x7ff)); |
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if (exponent < -(8*(int)sizeof(mantissa)-1)) { |
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MyInt = (INT32)(mantissa << (8*(int)sizeof(mantissa)-1)); |
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} else if(exponent < 0) { |
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MyInt = (INT32)(mantissa << -exponent); |
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} else if(exponent > (8*(int)sizeof(mantissa)-1)) { |
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MyInt = (INT32)(mantissa >> (8*(int)sizeof(mantissa)-1)); |
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} else {
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MyInt = (INT32)(mantissa >> exponent); |
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} |
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if (DblInt & 0x8000000000000000) |
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MyInt = -MyInt; |
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return(MyInt);
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} |
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#else // WIN32 & X86 |
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#define NCSfloatToInt32_RM(f) ((INT32)(f))
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#define NCSfloatToInt32_0_1(x) ((INT32)(x))
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#define NCSfloatToInt32(x) ((INT32)(x))
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#define NCSdoubleToInt32(x) ((INT32)(x))
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#endif // WIN32 && X86 |
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static NCS_INLINE INT32 NCSCeil(double a) |
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{
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if(a >= 0.0) { |
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INT32 v = NCSdoubleToInt32(a); |
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return(v + ((a != v) ? 1 : 0)); |
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} else {
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return(NCSdoubleToInt32(a));
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} |
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} |
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static NCS_INLINE INT32 NCSFloor(double a) |
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{
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if(a >= 0.0) { |
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return(NCSdoubleToInt32(a));
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} else {
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INT32 v = NCSdoubleToInt32(a); |
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return(v - ((a != v) ? 1 : 0)); |
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} |
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} |
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static NCS_INLINE INT32 NCSCeilDiv(INT32 n, INT32 d)
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{
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if(d == 0) { |
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return(0x7fffffff); |
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} else if(n >= 0 && d > 0) { |
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return((n / d + ((n % d) ? 1 : 0))); |
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} else {
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return(n / d);
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} |
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// if(n < 0 || d < 0) {
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// return((INT32)ceil(n / (double)d));
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// } else {
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// return((n / d + ((n % d) ? 1 : 0)));
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// }
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} |
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static NCS_INLINE INT32 NCSFloorDiv(INT32 n, INT32 d)
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{
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switch(d) {
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case 1: return(n); break; |
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case 2: return(n >> 1); break; |
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case 4: return(n >> 2); break; |
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default:
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if(n < 0 || d < 0) { |
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return((INT32)NCSFloor(n / (double)d)); |
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} else {
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return(n / d);
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} |
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break;
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} |
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} |
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static NCS_INLINE UINT32 NCS2Pow(UINT32 n)
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{
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// return(pow(2, n));
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return(1 << n); |
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} |
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static NCS_INLINE IEEE8 NCS2PowS(INT32 n)
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{
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// return(pow(2, n));
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if(n >= 0) { |
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return((IEEE8)(1 << n)); |
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} else {
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return(1.0 / (1 << -n)); |
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} |
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} |
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static NCS_INLINE INT32 NCSLog2(INT32 n)
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{
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INT32 nLog; |
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for(nLog = 0; n > 1; nLog++) { |
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n >>= 1;
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} |
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return nLog;
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} |
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static NCS_INLINE UINT64 NCSAbs(INT64 a)
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{
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// return(abs(a));
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return((a < 0) ? -a : a); |
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} |
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static NCS_INLINE BOOLEAN NCSIsPow2(UINT32 nValue)
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{
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if(NCS2Pow(NCSLog2(nValue)) == nValue) {
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return(TRUE);
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} |
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return(FALSE);
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} |
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#else
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#ifdef __cplusplus
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extern void *NCSNew(INT32 nSize, bool bClear = false); |
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extern void NCSDelete(void *p); |
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#endif // __cplusplus |
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extern INT32 NCSCeil(double a); |
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extern INT32 NCSFloor(double a); |
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extern INT32 NCSCeilDiv(INT32 n, INT32 d);
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extern INT32 NCSFloorDiv(INT32 n, INT32 d);
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extern UINT32 NCS2Pow(UINT32 n);
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extern IEEE8 NCS2PowS(INT32 n);
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extern UINT64 NCSAbs(INT64 a);
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#endif /* NCS_INLINE_FUNCS */ |
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#endif // !MACOSX |
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#ifdef __cplusplus
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} |
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#endif
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#endif /* NCSMISC_H */ |