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Tricks of the Windows Gam…ming Gurus (2nd Edition)
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Disc2.iso
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vc98
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crt
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src
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fltintrn.h
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C/C++ Source or Header
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1998-06-17
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/***
*fltintrn.h - contains declarations of internal floating point types,
* routines and variables
*
* Copyright (c) 1985-1997, Microsoft Corporation. All rights reserved.
*
*Purpose:
* Declares floating point types, routines and variables used
* internally by the C run-time.
*
* [Internal]
*
****/
#if _MSC_VER > 1000
#pragma once
#endif /* _MSC_VER > 1000 */
#ifndef _INC_FLTINTRN
#define _INC_FLTINTRN
#ifndef _CRTBLD
/*
* This is an internal C runtime header file. It is used when building
* the C runtimes only. It is not to be used as a public header file.
*/
#error ERROR: Use of C runtime library internal header file.
#endif /* _CRTBLD */
#ifdef __cplusplus
extern "C" {
#endif /* __cplusplus */
#include <cruntime.h>
/* Define _CRTIMP */
#ifndef _CRTIMP
#ifdef CRTDLL
#define _CRTIMP __declspec(dllexport)
#else /* CRTDLL */
#ifdef _DLL
#define _CRTIMP __declspec(dllimport)
#else /* _DLL */
#define _CRTIMP
#endif /* _DLL */
#endif /* CRTDLL */
#endif /* _CRTIMP */
/* Define __cdecl for non-Microsoft compilers */
#if (!defined (_MSC_VER) && !defined (__cdecl))
#define __cdecl
#endif /* (!defined (_MSC_VER) && !defined (__cdecl)) */
/*
* For MS C for the x86 family, disable the annoying "long double is the
* same precision as double" warning
*/
#ifdef _M_IX86
#pragma warning(disable:4069)
#endif /* _M_IX86 */
/*
* structs used to fool the compiler into not generating floating point
* instructions when copying and pushing [long] double values
*/
#ifndef DOUBLE
typedef struct {
double x;
} DOUBLE;
#endif /* DOUBLE */
#ifndef LONGDOUBLE
typedef struct {
#if defined (_M_MRX000) || defined (_M_ALPHA) || defined (_M_PPC) || defined (_M_MPPC)
/*
* No long double type for MIPS, ALPHA, PPC. or PowerMac
*/
double x;
#else /* defined (_M_MRX000) || defined (_M_ALPHA) || defined (_M_PPC) || defined (_M_MPPC) */
/*
* Assume there is a long double type
*/
long double x;
#endif /* defined (_M_MRX000) || defined (_M_ALPHA) || defined (_M_PPC) || defined (_M_MPPC) */
} LONGDOUBLE;
#endif /* LONGDOUBLE */
/*
* typedef for _fltout
*/
typedef struct _strflt
{
int sign; /* zero if positive otherwise negative */
int decpt; /* exponent of floating point number */
int flag; /* zero if okay otherwise IEEE overflow */
char *mantissa; /* pointer to mantissa in string form */
}
*STRFLT;
/*
* typedef for _fltin
*/
typedef struct _flt
{
int flags;
int nbytes; /* number of characters read */
long lval;
double dval; /* the returned floating point number */
}
*FLT;
#ifdef _MAC
/*
* typedef for _fltinl
*/
typedef struct _fltl
{
int flags;
int nbytes; /* number of characters read */
long lval;
long double ldval; /* the returned floating point number */
}
*FLTL;
#endif /* _MAC */
/* floating point conversion routines, keep in sync with mrt32\include\convert.h */
char *_cftoe(double *, char *, int, int);
char *_cftof(double *, char *, int);
void __cdecl _fptostr(char *, int, STRFLT);
#ifdef _MT
STRFLT __cdecl _fltout2( double, STRFLT, char * );
FLT __cdecl _fltin2( FLT , const char *, int, int, int );
#else /* _MT */
STRFLT __cdecl _fltout( double );
FLT __cdecl _fltin( const char *, int, int, int );
#ifdef _MAC
FLTL __cdecl _fltinl( const char *, int, int, int );
#endif /* _MAC */
#endif /* _MT */
/*
* table of pointers to floating point helper routines
*
* We can't specify the prototypes for the entries of the table accurately,
* since different functions in the table have different arglists.
* So we declare the functions to take and return void (which is the
* correct prototype for _fptrap(), which is what the entries are all
* initialized to if no floating point is loaded) and cast appropriately
* on every usage.
*/
typedef void (* PFV)(void);
extern PFV _cfltcvt_tab[6];
typedef void (* PF0)(DOUBLE*, char*, int, int, int);
#define _cfltcvt(a,b,c,d,e) (*((PF0)_cfltcvt_tab[0]))(a,b,c,d,e)
typedef void (* PF1)(char*);
#define _cropzeros(a) (*((PF1)_cfltcvt_tab[1]))(a)
typedef void (* PF2)(int, char*, char*);
#define _fassign(a,b,c) (*((PF2)_cfltcvt_tab[2]))(a,b,c)
typedef void (* PF3)(char*);
#define _forcdecpt(a) (*((PF3)_cfltcvt_tab[3]))(a)
typedef int (* PF4)(DOUBLE*);
#define _positive(a) (*((PF4)_cfltcvt_tab[4]))(a)
typedef void (* PF5)(LONGDOUBLE*, char*, int, int, int);
#define _cldcvt(a,b,c,d,e) (*((PF5)_cfltcvt_tab[5]))(a,b,c,d,e)
#ifdef _M_IX86
#pragma warning(default:4069)
#endif /* _M_IX86 */
#ifdef __cplusplus
}
#endif /* __cplusplus */
#endif /* _INC_FLTINTRN */