fconv.c File Reference

#include <schily/mconfig.h>
#include <schily/stdlib.h>
#include <schily/standard.h>
#include <schily/string.h>
#include <schily/schily.h>
#include <schily/math.h>
#include <schily/nlsdefs.h>
#include <schily/float.h>
#include "cvt.c"

Include dependency graph for fconv.c:

Go to the source code of this file.

Macros
#define	isnan(val)   (0)
#define	NO_ISNAN
#define	isinf(val)   (0)
#define	NO_ISINF
#define	MDOUBLE   double
#define	abs(i)   ((i) < 0 ? -(i) : (i))

Functions
char *ecvt	__PR ((double, int, int *, int *))
static int _ferr	__PR ((char *, double))
EXPORT int	ftoes (register char *s, MDOUBLE val, register int fieldwidth, register int ndigits)
EXPORT int	ftofs (register char *s, MDOUBLE val, register int fieldwidth, register int ndigits)
LOCAL int	_ferr (char *s, double val)

Variables
static char	_js_nan [] = "(NaN)"
static char	_js_inf [] = "(Infinity)"

Macro Definition Documentation

abs

#define abs

(

i

)

((i) < 0 ? -(i) : (i))

Definition at line 206 of file fconv.c.

isinf

#define isinf

(

val

)

(0)

Definition at line 129 of file fconv.c.

isnan

#define isnan

(

val

)

(0)

Definition at line 124 of file fconv.c.

MDOUBLE

#define MDOUBLE   double

Definition at line 200 of file fconv.c.

NO_ISINF

#define NO_ISINF

Definition at line 130 of file fconv.c.

NO_ISNAN

#define NO_ISNAN

Definition at line 125 of file fconv.c.

Function Documentation

__PR() [1/2]

static int _ferr __PR ( (char *, double)  )

static

__PR() [2/2]

char *ecvt __PR

(

(double, int, int *, int *)

)

_ferr()

LOCAL int _ferr	(	char *	s,
		double	val
	)

Definition at line 397 of file fconv.c.

{
    if (isnan(val)) {
        strcpy(s, _js_nan);
        return (sizeof (_js_nan) - 1);
    }
 
    /*
     * Check first for NaN because finite() will return 1 on Nan too.
     */
    if (isinf(val)) {
        strcpy(s, _js_inf);
        return (sizeof (_js_inf) - 1);
    }
    return (0);
}

Referenced by ftoes(), and ftofs().

ftoes()

EXPORT int ftoes	(	register char *	s,
		MDOUBLE	val,
		register int	fieldwidth,
		register int	ndigits
	)

Definition at line 209 of file fconv.c.

{
    register    char    *b;
    register    char    *rs;
    register    int len;
    register    int rdecpt;
            int     decpt;
            int sign;
 
#ifndef __DO_LONG_DOUBLE__
    if ((len = _ferr(s, val)) > 0)
        return (len);
#endif
    rs = s;
#ifdef  V7_FLOATSTYLE
    b = ecvt(val, ndigits, &decpt, &sign);
    rdecpt = decpt;
#else
    b = ecvt(val, ndigits+1, &decpt, &sign);
    rdecpt = decpt-1;
#endif
#ifdef  __DO_LONG_DOUBLE__
    len = *b;
    if (len < '0' || len > '9') {       /* Inf/NaN */
        strcpy(s, b);
        return (strlen(b));
    }
#endif
    len = ndigits + 6;          /* Punkt e +/- nnn */
    if (sign)
        len++;
    if (fieldwidth > len)
        while (fieldwidth-- > len)
            *rs++ = ' ';
    if (sign)
        *rs++ = '-';
#ifndef V7_FLOATSTYLE
    if (*b)
        *rs++ = *b++;
#endif
#if defined(HAVE_LOCALECONV) && defined(USE_LOCALE)
    *rs++ = *(localeconv()->decimal_point);
#else
    *rs++ = '.';
#endif
    while (*b && ndigits-- > 0)
        *rs++ = *b++;
    *rs++ = 'e';
    *rs++ = rdecpt >= 0 ? '+' : '-';
    rdecpt = abs(rdecpt);
#ifdef  __DO_LONG_DOUBLE__
    if (rdecpt >= 1000) {           /* Max-Exp is > 4000 */
        *rs++ = rdecpt / 1000 + '0';
        rdecpt %= 1000;
    }
#endif
#ifndef V7_FLOATSTYLE
    if (rdecpt >= 100)
#endif
    {
        *rs++ = rdecpt / 100 + '0';
        rdecpt %= 100;
    }
    *rs++ = rdecpt / 10 + '0';
    *rs++ = rdecpt % 10 + '0';
    *rs = '\0';
    return (rs - s);
}

Referenced by for().

ftofs()

EXPORT int ftofs	(	register char *	s,
		MDOUBLE	val,
		register int	fieldwidth,
		register int	ndigits
	)

Definition at line 290 of file fconv.c.

{
    register    char    *b;
    register    char    *rs;
    register    int len;
    register    int rdecpt;
            int     decpt;
            int sign;
 
#ifndef __DO_LONG_DOUBLE__
    if ((len = _ferr(s, val)) > 0)
        return (len);
#endif
    rs = s;
#ifdef  USE_ECVT
    /*
     * Needed on systems with broken fcvt() implementation
     * (e.g. Cygwin32)
     */
    b = ecvt(val, ndigits, &decpt, &sign);
    /*
     * The next call is needed to force higher precision.
     */
    if (decpt > 0)
        b = ecvt(val, ndigits+decpt, &decpt, &sign);
#else
    b = fcvt(val, ndigits, &decpt, &sign);
#endif
#ifdef  __DO_LONG_DOUBLE__
    len = *b;
    if (len < '0' || len > '9') {       /* Inf/NaN */
        strcpy(s, b);
        return (strlen(b));
    }
#endif
    rdecpt = decpt;
    len = rdecpt + ndigits + 1;
    if (rdecpt < 0)
        len -= rdecpt;
    if (sign)
        len++;
    if (fieldwidth > len)
        while (fieldwidth-- > len)
            *rs++ = ' ';
    if (sign)
        *rs++ = '-';
    if (rdecpt > 0) {
        len = rdecpt;
        while (*b && len-- > 0)
            *rs++ = *b++;
#ifdef  USE_ECVT
        while (len-- > 0)
            *rs++ = '0';
#endif
    }
#ifndef V7_FLOATSTYLE
    else {
        *rs++ = '0';
    }
#endif
#if defined(HAVE_LOCALECONV) && defined(USE_LOCALE)
    *rs++ = *(localeconv()->decimal_point);
#else
    *rs++ = '.';
#endif
    if (rdecpt < 0) {
        len = rdecpt;
        while (len++ < 0 && ndigits-- > 0)
            *rs++ = '0';
    }
    while (*b && ndigits-- > 0)
        *rs++ = *b++;
#ifdef  USE_ECVT
    while (ndigits-- > 0)
        *rs++ = '0';
#endif
    *rs = '\0';
    return (rs - s);
}

Referenced by for().

Variable Documentation

_js_inf

char _js_inf[] = "(Infinity)"

static

Definition at line 190 of file fconv.c.

Referenced by _ferr().

_js_nan

char _js_nan[] = "(NaN)"

static

Definition at line 189 of file fconv.c.

Referenced by _ferr().