fltcnv.h

来自「开放源码的编译器open watcom 1.6.0版的源代码」· C头文件 代码 · 共 76 行

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*
*                            Open Watcom Project
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*    Portions Copyright (c) 1983-2002 Sybase, Inc. All Rights Reserved.
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*    This file contains Original Code and/or Modifications of Original
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#include "target.h"

#define FOUND_SIGN      0x01
#define LEFT_DIGITS     0x02
#define DECIMAL         0x04
#define RIGHT_DIGITS    0x08
#define EXPONENT        0x10
#define BAD_EXPONENT    0x20
#define DOUBLE          0x40
#define LONGDOUBLE      0x80

#define _SIGN           0
#define _DECIMAL        (_SIGN+1)
#define _DIGITS         (_DECIMAL+1)
#define _EXPONENT       (_DIGITS+CONVERSION_DIGITS)
#define _STRING_SIZE    (_EXPONENT+MAX_INT_SIZE)

#define _CanonSign( canon )     (&((canon)->string[_SIGN]))
#define _CanonDecimal( canon )  (&((canon)->string[_DECIMAL]))
#define _CanonDigits( canon )   (&((canon)->string[_DIGITS]))
#define _CanonExponent( canon ) (&((canon)->string[_EXPONENT]))

#define _CanonNumber( canon )   ((canon)->string)

typedef struct canon_form {
    int         exp;
    bool        neg;
    char        string[_STRING_SIZE+1];
    byte        col;
    byte        flags;
    byte        blanks;
} canon_form;

// Floating-point conversion return values:
// ========================================

#define FLT_OK                  0       //  conversion successful
#define FLT_RANGE_EXCEEDED      1       //  range exceeded during conversion
#define FLT_INVALID             2       //  not a valid floating-point number

#define PRECISION_SINGLE        0
#define PRECISION_DOUBLE        1
#define PRECISION_EXTENDED      2