Rev 1618 |
Blame |
Compare with Previous |
Last modification |
View Log
| RSS feed
/*-
* Copyright (c) 1990, 1993
* The Regents of the University of California. All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* Chris Torek.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
/* MODIFIED:
* --added include <arch/math.h>
* --initialization to prevent warnings
*/
#if defined(LIBC_SCCS) && !defined(lint)
#if 0
static char sccsid
[] = "@(#)vfprintf.c 8.1 (Berkeley) 6/4/93";
#endif
static const char rcsid
[] =
"$\Id: vfprintf.c,v 1.9 1996/06/22 10:34:02 jraynard Exp $";
#endif /* LIBC_SCCS and not lint */
/*
* Actual printf innards.
*
* This code is large and complicated...
*/
#include <sys/types.h>
#include <limits.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#if __STDC__
#include <stdarg.h>
#else
#include <varargs.h>
#endif
#include "local.h"
#include "fvwrite.h"
#ifdef _THREAD_SAFE
#include <pthread.h>
#include "pthread_private.h"
#endif
/* Define FLOATING_POINT to get floating point. */
#define FLOATING_POINT
/* MG */
#ifdef FLOATING_POINT
# if defined(_ANSI_SOURCE)
# undef _ANSI_SOURCE
# if defined(_POSIX_SOURCE)
# undef _POSIX_SOURCE
# include <arch/math.h>
# define _POSIX_SOURCE
# else
# include <arch/math.h>
# endif
# define _ANSI_SOURCE
# elif defined(_POSIX_SOURCE)
# undef _POSIX_SOURCE
# include <arch/math.h>
# define _POSIX_SOURCE
# else
# include <arch/math.h>
# endif
#endif
static int __sprint __P
((FILE
*, struct __suio
*));
static int __sbprintf __P
((FILE
*, const char *, va_list
));
static char * __ultoa __P
((u_long
, char *, int, int, char *));
static char * __uqtoa __P
((u_quad_t
, char *, int, int, char *));
/*
* Flush out all the vectors defined by the given uio,
* then reset it so that it can be reused.
*/
static int
__sprint
(fp
, uio
)
FILE
*fp
;
register struct __suio
*uio
;
{
register int err
;
if (uio
->uio_resid
== 0) {
uio
->uio_iovcnt
= 0;
return (0);
}
err
= __sfvwrite
(fp
, uio
);
uio
->uio_resid
= 0;
uio
->uio_iovcnt
= 0;
return (err
);
}
/*
* Helper function for `fprintf to unbuffered unix file': creates a
* temporary buffer. We only work on write-only files; this avoids
* worries about ungetc buffers and so forth.
*/
static int
__sbprintf
(fp
, fmt
, ap
)
register FILE
*fp
;
const char *fmt
;
va_list ap
;
{
int ret
;
FILE fake
;
unsigned char buf
[BUFSIZ
];
/* copy the important variables */
fake._flags
= fp
->_flags
& ~__SNBF
;
fake._file
= fp
->_file
;
fake._cookie
= fp
->_cookie
;
fake._write
= fp
->_write
;
/* set up the buffer */
fake._bf._base
= fake._p
= buf
;
fake._bf._size
= fake._w
= sizeof(buf
);
fake._lbfsize
= 0; /* not actually used, but Just In Case */
/* do the work, then copy any error status */
ret
= vfprintf(&fake
, fmt
, ap
);
if (ret
>= 0 && fflush(&fake
))
ret
= EOF
;
if (fake._flags
& __SERR
)
fp
->_flags
|= __SERR
;
return (ret
);
}
/*
* Macros for converting digits to letters and vice versa
*/
#define to_digit(c) ((c) - '0')
#define is_digit(c) ((unsigned)to_digit(c) <= 9)
#define to_char(n) ((n) + '0')
/*
* Convert an unsigned long to ASCII for printf purposes, returning
* a pointer to the first character of the string representation.
* Octal numbers can be forced to have a leading zero; hex numbers
* use the given digits.
*/
static char *
__ultoa
(val
, endp
, base
, octzero
, xdigs
)
register u_long val
;
char *endp
;
int base
, octzero
;
char *xdigs
;
{
register char *cp
= endp
;
register long sval
;
/*
* Handle the three cases separately, in the hope of getting
* better/faster code.
*/
switch (base
) {
case 10:
if (val
< 10) { /* many numbers are 1 digit */
*--cp
= to_char
(val
);
return (cp
);
}
/*
* On many machines, unsigned arithmetic is harder than
* signed arithmetic, so we do at most one unsigned mod and
* divide; this is sufficient to reduce the range of
* the incoming value to where signed arithmetic works.
*/
if (val
> LONG_MAX
) {
*--cp
= to_char
(val
% 10);
sval
= val
/ 10;
} else
sval
= val
;
do {
*--cp
= to_char
(sval
% 10);
sval
/= 10;
} while (sval
!= 0);
break;
case 8:
do {
*--cp
= to_char
(val
& 7);
val
>>= 3;
} while (val
);
if (octzero
&& *cp
!= '0')
*--cp
= '0';
break;
case 16:
do {
*--cp
= xdigs
[val
& 15];
val
>>= 4;
} while (val
);
break;
default: /* oops */
abort();
}
return (cp
);
}
/* Identical to __ultoa, but for quads. */
static char *
__uqtoa
(val
, endp
, base
, octzero
, xdigs
)
register u_quad_t val
;
char *endp
;
int base
, octzero
;
char *xdigs
;
{
register char *cp
= endp
;
register quad_t sval
;
/* quick test for small values; __ultoa is typically much faster */
/* (perhaps instead we should run until small, then call __ultoa?) */
if (val
<= ULONG_MAX
)
return (__ultoa
((u_long
)val
, endp
, base
, octzero
, xdigs
));
switch (base
) {
case 10:
if (val
< 10) {
*--cp
= to_char
(val
% 10);
return (cp
);
}
if (val
> QUAD_MAX
) {
*--cp
= to_char
(val
% 10);
sval
= val
/ 10;
} else
sval
= val
;
do {
*--cp
= to_char
(sval
% 10);
sval
/= 10;
} while (sval
!= 0);
break;
case 8:
do {
*--cp
= to_char
(val
& 7);
val
>>= 3;
} while (val
);
if (octzero
&& *cp
!= '0')
*--cp
= '0';
break;
case 16:
do {
*--cp
= xdigs
[val
& 15];
val
>>= 4;
} while (val
);
break;
default:
abort();
}
return (cp
);
}
#ifdef FLOATING_POINT
#include <math.h>
#include "floatio.h"
#define BUF (MAXEXP+MAXFRACT+1) /* + decimal point */
#define DEFPREC 6
static char *cvt __P
((double, int, int, char *, int *, int, int *));
static int exponent __P
((char *, int, int));
#else /* no FLOATING_POINT */
#define BUF 68
#endif /* FLOATING_POINT */
/*
* Flags used during conversion.
*/
#define ALT 0x001 /* alternate form */
#define HEXPREFIX 0x002 /* add 0x or 0X prefix */
#define LADJUST 0x004 /* left adjustment */
#define LONGDBL 0x008 /* long double; unimplemented */
#define LONGINT 0x010 /* long integer */
#define QUADINT 0x020 /* quad integer */
#define SHORTINT 0x040 /* short integer */
#define ZEROPAD 0x080 /* zero (as opposed to blank) pad */
#define FPT 0x100 /* Floating point number */
int
vfprintf(fp
, fmt0
, ap
)
FILE
*fp
;
const char *fmt0
;
va_list ap
;
{
register char *fmt
; /* format string */
register int ch
; /* character from fmt */
register int n
; /* handy integer (short term usage) */
register char *cp
; /* handy char pointer (short term usage) */
register struct __siov
*iovp
;/* for PRINT macro */
register int flags
; /* flags as above */
int ret
; /* return value accumulator */
int width
; /* width from format (%8d), or 0 */
int prec
; /* precision from format (%.3d), or -1 */
char sign
; /* sign prefix (' ', '+', '-', or \0) */
#ifdef FLOATING_POINT
char softsign
; /* temporary negative sign for floats */
double _double
; /* double precision arguments %[eEfgG] */
int expt
; /* integer value of exponent */
int expsize
; /* character count for expstr */
int ndig
; /* actual number of digits returned by cvt */
char expstr
[7]; /* buffer for exponent string */
#endif
u_long ulval
; /* integer arguments %[diouxX] */
u_quad_t uqval
; /* %q integers */
int base
; /* base for [diouxX] conversion */
int dprec
; /* a copy of prec if [diouxX], 0 otherwise */
int realsz
; /* field size expanded by dprec, sign, etc */
int size
; /* size of converted field or string */
char *xdigs
; /* digits for [xX] conversion */
#define NIOV 8
struct __suio uio
; /* output information: summary */
struct __siov iov
[NIOV
];/* ... and individual io vectors */
char buf
[BUF
]; /* space for %c, %[diouxX], %[eEfgG] */
char ox
[2]; /* space for 0x hex-prefix */
/*
* Choose PADSIZE to trade efficiency vs. size. If larger printf
* fields occur frequently, increase PADSIZE and make the initialisers
* below longer.
*/
#define PADSIZE 16 /* pad chunk size */
static char blanks
[PADSIZE
] =
{' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' '};
static char zeroes
[PADSIZE
] =
{'0','0','0','0','0','0','0','0','0','0','0','0','0','0','0','0'};
/*
* BEWARE, these `goto error' on error, and PAD uses `n'.
*/
#define PRINT(ptr, len) { \
iovp->iov_base = (ptr); \
iovp->iov_len = (len); \
uio.uio_resid += (len); \
iovp++; \
if (++uio.uio_iovcnt >= NIOV) { \
if (__sprint(fp, &uio)) \
goto error; \
iovp = iov; \
} \
}
#define PAD(howmany, with) { \
if ((n = (howmany)) > 0) { \
while (n > PADSIZE) { \
PRINT(with, PADSIZE); \
n -= PADSIZE; \
} \
PRINT(with, n); \
} \
}
#define FLUSH() { \
if (uio.uio_resid && __sprint(fp, &uio)) \
goto error; \
uio.uio_iovcnt = 0; \
iovp = iov; \
}
/*
* To extend shorts properly, we need both signed and unsigned
* argument extraction methods.
*/
#define SARG() \
(flags&LONGINT ? va_arg(ap, long) : \
flags&SHORTINT ? (long)(short)va_arg(ap, int) : \
(long)va_arg(ap, int))
#define UARG() \
(flags&LONGINT ? va_arg(ap, u_long) : \
flags&SHORTINT ? (u_long)(u_short)va_arg(ap, int) : \
(u_long)va_arg(ap, u_int))
/*MG (to prevent warnings) */
#ifdef FLOATING_POINT
_double
=0;
expsize
=0;
#endif
ulval
=0;
uqval
=0;
xdigs
=NULL
;
#ifdef _THREAD_SAFE
_thread_flockfile
(fp
,__FILE__
,__LINE__
);
#endif
/* sorry, fprintf(read_only_file, "") returns EOF, not 0 */
if (cantwrite
(fp
)) {
#ifdef _THREAD_SAFE
_thread_funlockfile
(fp
);
#endif
return (EOF
);
}
/* optimise fprintf(stderr) (and other unbuffered Unix files) */
/*
if ((fp->_flags & (__SNBF|__SWR|__SRW)) == (__SNBF|__SWR) &&
fp->_file >= 0) {
#ifdef _THREAD_SAFE
_thread_funlockfile(fp);
#endif
return (__sbprintf(fp, fmt0, ap));
}
*/
fmt
= (char *)fmt0
;
uio.
uio_iov = iovp
= iov
;
uio.
uio_resid = 0;
uio.
uio_iovcnt = 0;
ret
= 0;
/*
* Scan the format for conversions (`%' character).
*/
for (;;) {
for (cp
= fmt
; (ch
= *fmt
) != '\0' && ch
!= '%'; fmt
++)
/* void */;
if ((n
= fmt
- cp
) != 0) {
PRINT
(cp
, n
);
ret
+= n
;
}
if (ch
== '\0')
goto done
;
fmt
++; /* skip over '%' */
flags
= 0;
dprec
= 0;
width
= 0;
prec
= -1;
sign
= '\0';
rflag
: ch
= *fmt
++;
reswitch
: switch (ch
) {
case ' ':
/*
* ``If the space and + flags both appear, the space
* flag will be ignored.''
* -- ANSI X3J11
*/
if (!sign
)
sign
= ' ';
goto rflag
;
case '#':
flags
|= ALT
;
goto rflag
;
case '*':
/*
* ``A negative field width argument is taken as a
* - flag followed by a positive field width.''
* -- ANSI X3J11
* They don't exclude field widths read from args.
*/
if ((width
= va_arg(ap
, int)) >= 0)
goto rflag
;
width
= -width
;
/* FALLTHROUGH */
case '-':
flags
|= LADJUST
;
goto rflag
;
case '+':
sign
= '+';
goto rflag
;
case '.':
if ((ch
= *fmt
++) == '*') {
n
= va_arg(ap
, int);
prec
= n
< 0 ? -1 : n
;
goto rflag
;
}
n
= 0;
while (is_digit
(ch
)) {
n
= 10 * n
+ to_digit
(ch
);
ch
= *fmt
++;
}
prec
= n
< 0 ? -1 : n
;
goto reswitch
;
case '0':
/*
* ``Note that 0 is taken as a flag, not as the
* beginning of a field width.''
* -- ANSI X3J11
*/
flags
|= ZEROPAD
;
goto rflag
;
case '1': case '2': case '3': case '4':
case '5': case '6': case '7': case '8': case '9':
n
= 0;
do {
n
= 10 * n
+ to_digit
(ch
);
ch
= *fmt
++;
} while (is_digit
(ch
));
width
= n
;
goto reswitch
;
#ifdef FLOATING_POINT
case 'L':
flags
|= LONGDBL
;
goto rflag
;
#endif
case 'h':
flags
|= SHORTINT
;
goto rflag
;
case 'l':
flags
|= LONGINT
;
goto rflag
;
case 'q':
flags
|= QUADINT
;
goto rflag
;
case 'c':
*(cp
= buf
) = va_arg(ap
, int);
size
= 1;
sign
= '\0';
break;
case 'D':
flags
|= LONGINT
;
/*FALLTHROUGH*/
case 'd':
case 'i':
if (flags
& QUADINT
) {
uqval
= va_arg(ap
, quad_t
);
if ((quad_t
)uqval
< 0) {
uqval
= -uqval
;
sign
= '-';
}
} else {
ulval
= SARG
();
if ((long)ulval
< 0) {
ulval
= -ulval
;
sign
= '-';
}
}
base
= 10;
goto number
;
#ifdef FLOATING_POINT
case 'e':
case 'E':
case 'f':
goto fp_begin
;
case 'g':
case 'G':
if (prec
== 0)
prec
= 1;
fp_begin
: if (prec
== -1)
prec
= DEFPREC
;
if (flags
& LONGDBL
)
_double
= (double)va_arg(ap
, long double);
else
_double
= va_arg(ap
, double);
/* do this before tricky precision changes */
if (isinf
(_double
)) {
if (_double
< 0)
sign
= '-';
cp
= "Inf";
size
= 3;
break;
}
if (isnan
(_double
)) {
cp
= "NaN";
size
= 3;
break;
}
flags
|= FPT
;
cp
= cvt
(_double
, prec
, flags
, &softsign
,
&expt
, ch
, &ndig
);
if (ch
== 'g' || ch
== 'G') {
if (expt
<= -4 || expt
> prec
)
ch
= (ch
== 'g') ? 'e' : 'E';
else
ch
= 'g';
}
if (ch
<= 'e') { /* 'e' or 'E' fmt */
--expt
;
expsize
= exponent
(expstr
, expt
, ch
);
size
= expsize
+ ndig
;
if (ndig
> 1 || flags
& ALT
)
++size
;
} else if (ch
== 'f') { /* f fmt */
if (expt
> 0) {
size
= expt
;
if (prec
|| flags
& ALT
)
size
+= prec
+ 1;
} else /* "0.X" */
size
= prec
+ 2;
} else if (expt
>= ndig
) { /* fixed g fmt */
size
= expt
;
if (flags
& ALT
)
++size
;
} else
size
= ndig
+ (expt
> 0 ?
1 : 2 - expt
);
if (softsign
)
sign
= '-';
break;
#endif /* FLOATING_POINT */
case 'n':
if (flags
& QUADINT
)
*va_arg(ap
, quad_t
*) = ret
;
else if (flags
& LONGINT
)
*va_arg(ap
, long *) = ret
;
else if (flags
& SHORTINT
)
*va_arg(ap
, short *) = ret
;
else
*va_arg(ap
, int *) = ret
;
continue; /* no output */
case 'O':
flags
|= LONGINT
;
/*FALLTHROUGH*/
case 'o':
if (flags
& QUADINT
)
uqval
= va_arg(ap
, u_quad_t
);
else
ulval
= UARG
();
base
= 8;
goto nosign
;
case 'p':
/*
* ``The argument shall be a pointer to void. The
* value of the pointer is converted to a sequence
* of printable characters, in an implementation-
* defined manner.''
* -- ANSI X3J11
*/
ulval
= (u_long
)va_arg(ap
, void *);
base
= 16;
xdigs
= "0123456789abcdef";
flags
= (flags
& ~QUADINT
) | HEXPREFIX
;
ch
= 'x';
goto nosign
;
case 's':
if ((cp
= va_arg(ap
, char *)) == NULL
)
cp
= "(null)";
if (prec
>= 0) {
/*
* can't use strlen; can only look for the
* NUL in the first `prec' characters, and
* strlen() will go further.
*/
char *p
= memchr(cp
, 0, (size_t)prec
);
if (p
!= NULL
) {
size
= p
- cp
;
if (size
> prec
)
size
= prec
;
} else
size
= prec
;
} else
size
= strlen(cp
);
sign
= '\0';
break;
case 'U':
flags
|= LONGINT
;
/*FALLTHROUGH*/
case 'u':
if (flags
& QUADINT
)
uqval
= va_arg(ap
, u_quad_t
);
else
ulval
= UARG
();
base
= 10;
goto nosign
;
case 'X':
xdigs
= "0123456789ABCDEF";
goto hex
;
case 'x':
xdigs
= "0123456789abcdef";
hex
: if (flags
& QUADINT
)
uqval
= va_arg(ap
, u_quad_t
);
else
ulval
= UARG
();
base
= 16;
/* leading 0x/X only if non-zero */
if (flags
& ALT
&&
(flags
& QUADINT
? uqval
!= 0 : ulval
!= 0))
flags
|= HEXPREFIX
;
/* unsigned conversions */
nosign
: sign
= '\0';
/*
* ``... diouXx conversions ... if a precision is
* specified, the 0 flag will be ignored.''
* -- ANSI X3J11
*/
number
: if ((dprec
= prec
) >= 0)
flags
&= ~ZEROPAD
;
/*
* ``The result of converting a zero value with an
* explicit precision of zero is no characters.''
* -- ANSI X3J11
*/
cp
= buf
+ BUF
;
if (flags
& QUADINT
) {
if (uqval
!= 0 || prec
!= 0)
cp
= __uqtoa
(uqval
, cp
, base
,
flags
& ALT
, xdigs
);
} else {
if (ulval
!= 0 || prec
!= 0)
cp
= __ultoa
(ulval
, cp
, base
,
flags
& ALT
, xdigs
);
}
size
= buf
+ BUF
- cp
;
break;
default: /* "%?" prints ?, unless ? is NUL */
if (ch
== '\0')
goto done
;
/* pretend it was %c with argument ch */
cp
= buf
;
*cp
= ch
;
size
= 1;
sign
= '\0';
break;
}
/*
* All reasonable formats wind up here. At this point, `cp'
* points to a string which (if not flags&LADJUST) should be
* padded out to `width' places. If flags&ZEROPAD, it should
* first be prefixed by any sign or other prefix; otherwise,
* it should be blank padded before the prefix is emitted.
* After any left-hand padding and prefixing, emit zeroes
* required by a decimal [diouxX] precision, then print the
* string proper, then emit zeroes required by any leftover
* floating precision; finally, if LADJUST, pad with blanks.
*
* Compute actual size, so we know how much to pad.
* size excludes decimal prec; realsz includes it.
*/
realsz
= dprec
> size
? dprec
: size
;
if (sign
)
realsz
++;
else if (flags
& HEXPREFIX
)
realsz
+= 2;
/* right-adjusting blank padding */
if ((flags
& (LADJUST
|ZEROPAD
)) == 0)
PAD
(width
- realsz
, blanks
);
/* prefix */
if (sign
) {
PRINT
(&sign
, 1);
} else if (flags
& HEXPREFIX
) {
ox
[0] = '0';
ox
[1] = ch
;
PRINT
(ox
, 2);
}
/* right-adjusting zero padding */
if ((flags
& (LADJUST
|ZEROPAD
)) == ZEROPAD
)
PAD
(width
- realsz
, zeroes
);
/* leading zeroes from decimal precision */
PAD
(dprec
- size
, zeroes
);
/* the string or number proper */
#ifdef FLOATING_POINT
if ((flags
& FPT
) == 0) {
PRINT
(cp
, size
);
} else { /* glue together f_p fragments */
if (ch
>= 'f') { /* 'f' or 'g' */
if (_double
== 0) {
/* kludge for __dtoa irregularity */
if (expt
>= ndig
&&
(flags
& ALT
) == 0) {
PRINT
("0", 1);
} else {
PRINT
("0.", 2);
PAD
(ndig
- 1, zeroes
);
}
} else if (expt
<= 0) {
PRINT
("0.", 2);
PAD
(-expt
, zeroes
);
PRINT
(cp
, ndig
);
} else if (expt
>= ndig
) {
PRINT
(cp
, ndig
);
PAD
(expt
- ndig
, zeroes
);
if (flags
& ALT
)
PRINT
(".", 1);
} else {
PRINT
(cp
, expt
);
cp
+= expt
;
PRINT
(".", 1);
PRINT
(cp
, ndig
-expt
);
}
} else { /* 'e' or 'E' */
if (ndig
> 1 || flags
& ALT
) {
ox
[0] = *cp
++;
ox
[1] = '.';
PRINT
(ox
, 2);
if (_double
) {
PRINT
(cp
, ndig
-1);
} else /* 0.[0..] */
/* __dtoa irregularity */
PAD
(ndig
- 1, zeroes
);
} else /* XeYYY */
PRINT
(cp
, 1);
PRINT
(expstr
, expsize
);
}
}
#else
PRINT
(cp
, size
);
#endif
/* left-adjusting padding (always blank) */
if (flags
& LADJUST
)
PAD
(width
- realsz
, blanks
);
/* finally, adjust ret */
ret
+= width
> realsz
? width
: realsz
;
FLUSH
(); /* copy out the I/O vectors */
}
done
:
FLUSH
();
error
:
if (__sferror
(fp
))
ret
= EOF
;
#ifdef _THREAD_SAFE
_thread_funlockfile
(fp
);
#endif
return (ret
);
/* NOTREACHED */
}
#ifdef FLOATING_POINT
extern char *__dtoa __P
((double, int, int, int *, int *, char **));
static char *
cvt
(value
, ndigits
, flags
, sign
, decpt
, ch
, length
)
double value
;
int ndigits
, flags
, *decpt
, ch
, *length
;
char *sign
;
{
int mode
, dsgn
;
char *digits
, *bp
, *rve
;
if (ch
== 'f')
mode
= 3; /* ndigits after the decimal point */
else {
/*
* To obtain ndigits after the decimal point for the 'e'
* and 'E' formats, round to ndigits + 1 significant
* figures.
*/
if (ch
== 'e' || ch
== 'E')
ndigits
++;
mode
= 2; /* ndigits significant digits */
}
if (value
< 0) {
value
= -value
;
*sign
= '-';
} else
*sign
= '\000';
digits
= __dtoa
(value
, mode
, ndigits
, decpt
, &dsgn
, &rve
);
if ((ch
!= 'g' && ch
!= 'G') || flags
& ALT
) {
/* print trailing zeros */
bp
= digits
+ ndigits
;
if (ch
== 'f') {
if (*digits
== '0' && value
)
*decpt
= -ndigits
+ 1;
bp
+= *decpt
;
}
if (value
== 0) /* kludge for __dtoa irregularity */
rve
= bp
;
while (rve
< bp
)
*rve
++ = '0';
}
*length
= rve
- digits
;
return (digits
);
}
static int
exponent
(p0
, exp, fmtch
)
char *p0
;
int exp, fmtch
;
{
register char *p
, *t
;
char expbuf
[MAXEXP
];
p
= p0
;
*p
++ = fmtch
;
if (exp < 0) {
exp = -exp;
*p
++ = '-';
}
else
*p
++ = '+';
t
= expbuf
+ MAXEXP
;
if (exp > 9) {
do {
*--t
= to_char
(exp % 10);
} while ((exp /= 10) > 9);
*--t
= to_char
(exp);
for (; t
< expbuf
+ MAXEXP
; *p
++ = *t
++);
}
else {
*p
++ = '0';
*p
++ = to_char
(exp);
}
return (p
- p0
);
}
#endif /* FLOATING_POINT */