881 lines
21 KiB
C
881 lines
21 KiB
C
/* $NetBSD: vfprintf.c,v 1.42 2001/12/07 11:47:44 yamt Exp $ */
|
|
|
|
/*-
|
|
* Copyright (c) 1990 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.
|
|
*/
|
|
|
|
#include <sys/cdefs.h>
|
|
#if defined(LIBC_SCCS) && !defined(lint)
|
|
#if 0
|
|
static char *sccsid = "@(#)vfprintf.c 5.50 (Berkeley) 12/16/92";
|
|
#else
|
|
__RCSID("$NetBSD: vfprintf.c,v 1.42 2001/12/07 11:47:44 yamt Exp $");
|
|
#endif
|
|
#endif /* LIBC_SCCS and not lint */
|
|
|
|
/*
|
|
* Actual printf innards.
|
|
*
|
|
* This code is large and complicated...
|
|
*/
|
|
|
|
#include "namespace.h"
|
|
#include <sys/types.h>
|
|
|
|
#include <assert.h>
|
|
#include <errno.h>
|
|
#include <stddef.h>
|
|
#include <stdint.h>
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <wchar.h>
|
|
|
|
#if __STDC__
|
|
#include <stdarg.h>
|
|
#else
|
|
#include <varargs.h>
|
|
#endif
|
|
|
|
#include "local.h"
|
|
#include "fvwrite.h"
|
|
#include "extern.h"
|
|
#include "reentrant.h"
|
|
|
|
static int __sprint __P((FILE *, struct __suio *));
|
|
static int __sbprintf __P((FILE *, const char *, va_list))
|
|
__attribute__((__format__(__printf__, 2, 0)));
|
|
|
|
/*
|
|
* 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;
|
|
struct __suio *uio;
|
|
{
|
|
int err;
|
|
|
|
_DIAGASSERT(fp != NULL);
|
|
_DIAGASSERT(uio != NULL);
|
|
|
|
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)
|
|
FILE *fp;
|
|
const char *fmt;
|
|
va_list ap;
|
|
{
|
|
int ret;
|
|
FILE fake;
|
|
struct __sfileext fakeext;
|
|
unsigned char buf[BUFSIZ];
|
|
|
|
_DIAGASSERT(fp != NULL);
|
|
_DIAGASSERT(fmt != NULL);
|
|
|
|
_FILEEXT_SETUP(&fake, &fakeext);
|
|
|
|
/* 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 = -1;
|
|
if (fake._flags & __SERR)
|
|
fp->_flags |= __SERR;
|
|
return (ret);
|
|
}
|
|
|
|
|
|
#ifdef FLOATING_POINT
|
|
#include <locale.h>
|
|
#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 40
|
|
|
|
#endif /* FLOATING_POINT */
|
|
|
|
#ifdef lint
|
|
static __inline void *__UNCONST __P((const void *));
|
|
static __inline void *
|
|
__UNCONST(v)
|
|
const void *v;
|
|
{
|
|
/* LINTED */
|
|
return (void *) v;
|
|
}
|
|
#else
|
|
#define __UNCONST(v) (void *)(v)
|
|
#endif
|
|
|
|
/*
|
|
* 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) ((char)((n) + '0'))
|
|
|
|
/*
|
|
* 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 MAXINT 0x080 /* (unsigned) intmax_t */
|
|
#define PTRINT 0x100 /* (unsigned) ptrdiff_t */
|
|
#define SIZEINT 0x200 /* (signed) size_t */
|
|
#define ZEROPAD 0x400 /* zero (as opposed to blank) pad */
|
|
#define FPT 0x800 /* Floating point number */
|
|
int
|
|
vfprintf(fp, fmt0, ap)
|
|
FILE *fp;
|
|
const char *fmt0;
|
|
_BSD_VA_LIST_ ap;
|
|
{
|
|
const char *fmt;/* format string */
|
|
int ch; /* character from fmt */
|
|
int n, m; /* handy integers (short term usage) */
|
|
const char *cp; /* handy char pointer (short term usage) */
|
|
char *bp; /* handy char pointer (short term usage) */
|
|
struct __siov *iovp;/* for PRINT macro */
|
|
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) */
|
|
wchar_t wc;
|
|
mbstate_t ps;
|
|
#ifdef FLOATING_POINT
|
|
char *decimal_point = localeconv()->decimal_point;
|
|
char softsign; /* temporary negative sign for floats */
|
|
double _double = 0; /* double precision arguments %[eEfgG] */
|
|
int expt; /* integer value of exponent */
|
|
int expsize = 0; /* character count for expstr */
|
|
int ndig; /* actual number of digits returned by cvt */
|
|
char expstr[7]; /* buffer for exponent string */
|
|
#endif
|
|
|
|
#ifdef __GNUC__ /* gcc has builtin quad type (long long) SOS */
|
|
#define quad_t long long
|
|
#define u_quad_t unsigned long long
|
|
#endif
|
|
|
|
#define INTMAX_T intmax_t
|
|
#define UINTMAX_T uintmax_t
|
|
|
|
UINTMAX_T _uintmax; /* integer arguments %[diouxX] */
|
|
enum { OCT, DEC, HEX } base;/* base for [diouxX] conversion */
|
|
int dprec; /* a copy of prec if [diouxX], 0 otherwise */
|
|
int realsz; /* field size expanded by dprec */
|
|
int size; /* size of converted field or string */
|
|
char *xdigs = NULL; /* 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 const char blanks[PADSIZE] =
|
|
{' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' '};
|
|
static const 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 = __UNCONST(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&MAXINT ? va_arg(ap, intmax_t) : \
|
|
flags&PTRINT ? va_arg(ap, ptrdiff_t) : \
|
|
flags&SIZEINT ? va_arg(ap, ssize_t) : /* XXX */ \
|
|
flags&QUADINT ? va_arg(ap, quad_t) : \
|
|
flags&LONGINT ? va_arg(ap, long) : \
|
|
flags&SHORTINT ? (long)(short)va_arg(ap, int) : \
|
|
(long)va_arg(ap, int))
|
|
#define UARG() \
|
|
(flags&MAXINT ? va_arg(ap, uintmax_t) : \
|
|
flags&PTRINT ? va_arg(ap, uintptr_t) : /* XXX */ \
|
|
flags&SIZEINT ? va_arg(ap, size_t) : \
|
|
flags&QUADINT ? va_arg(ap, u_quad_t) : \
|
|
flags&LONGINT ? va_arg(ap, u_long) : \
|
|
flags&SHORTINT ? (u_long)(u_short)va_arg(ap, int) : \
|
|
(u_long)va_arg(ap, u_int))
|
|
|
|
_DIAGASSERT(fp != NULL);
|
|
_DIAGASSERT(fmt0 != NULL);
|
|
|
|
FLOCKFILE(fp);
|
|
_SET_ORIENTATION(fp, -1);
|
|
|
|
/* sorry, fprintf(read_only_file, "") returns -1, not 0 */
|
|
if (cantwrite(fp)) {
|
|
errno = EBADF;
|
|
FUNLOCKFILE(fp);
|
|
return (-1);
|
|
}
|
|
|
|
/* optimise fprintf(stderr) (and other unbuffered Unix files) */
|
|
if ((fp->_flags & (__SNBF|__SWR|__SRW)) == (__SNBF|__SWR) &&
|
|
fp->_file >= 0) {
|
|
ret = __sbprintf(fp, fmt0, ap);
|
|
FUNLOCKFILE(fp);
|
|
return (ret);
|
|
}
|
|
|
|
fmt = fmt0;
|
|
uio.uio_iov = iovp = iov;
|
|
uio.uio_resid = 0;
|
|
uio.uio_iovcnt = 0;
|
|
ret = 0;
|
|
|
|
memset(&ps, 0, sizeof(ps));
|
|
|
|
/*
|
|
* Scan the format for conversions (`%' character).
|
|
*/
|
|
for (;;) {
|
|
cp = fmt;
|
|
while ((n = mbrtowc(&wc, fmt, MB_CUR_MAX, &ps)) > 0) {
|
|
fmt += n;
|
|
if (wc == '%') {
|
|
fmt--;
|
|
break;
|
|
}
|
|
}
|
|
if ((m = fmt - cp) != 0) {
|
|
PRINT(cp, m);
|
|
ret += m;
|
|
}
|
|
if (n <= 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 'j':
|
|
flags |= MAXINT;
|
|
goto rflag;
|
|
case 'l':
|
|
if (*fmt == 'l') {
|
|
fmt++;
|
|
flags |= QUADINT;
|
|
} else {
|
|
flags |= LONGINT;
|
|
}
|
|
goto rflag;
|
|
case 'q':
|
|
flags |= QUADINT;
|
|
goto rflag;
|
|
case 't':
|
|
flags |= PTRINT;
|
|
goto rflag;
|
|
case 'z':
|
|
flags |= SIZEINT;
|
|
goto rflag;
|
|
case 'c':
|
|
*buf = va_arg(ap, int);
|
|
cp = buf;
|
|
size = 1;
|
|
sign = '\0';
|
|
break;
|
|
case 'D':
|
|
flags |= LONGINT;
|
|
/*FALLTHROUGH*/
|
|
case 'd':
|
|
case 'i':
|
|
_uintmax = SARG();
|
|
if ((intmax_t)_uintmax < 0) {
|
|
_uintmax = -_uintmax;
|
|
sign = '-';
|
|
}
|
|
base = DEC;
|
|
goto number;
|
|
#ifdef FLOATING_POINT
|
|
case 'e':
|
|
case 'E':
|
|
case 'f':
|
|
case 'F':
|
|
case 'g':
|
|
case 'G':
|
|
if (prec == -1) {
|
|
prec = DEFPREC;
|
|
} else if ((ch == 'g' || ch == 'G') && prec == 0) {
|
|
prec = 1;
|
|
}
|
|
|
|
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 = '-';
|
|
if (ch == 'E' || ch == 'F' || ch == 'G')
|
|
cp = "INF";
|
|
else
|
|
cp = "inf";
|
|
size = 3;
|
|
break;
|
|
}
|
|
if (isnan(_double)) {
|
|
if (ch == 'E' || ch == 'F' || ch == 'G')
|
|
cp = "NAN";
|
|
else
|
|
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' || ch == 'E') {
|
|
--expt;
|
|
expsize = exponent(expstr, expt, ch);
|
|
size = expsize + ndig;
|
|
if (ndig > 1 || flags & ALT)
|
|
++size;
|
|
} else if (ch == 'f' || ch == 'F') {
|
|
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 & MAXINT)
|
|
*va_arg(ap, intmax_t *) = ret;
|
|
else if (flags & PTRINT)
|
|
*va_arg(ap, ptrdiff_t *) = ret;
|
|
else if (flags & SIZEINT)
|
|
*va_arg(ap, ssize_t *) = ret; /* XXX */
|
|
else 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':
|
|
_uintmax = UARG();
|
|
base = OCT;
|
|
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
|
|
*/
|
|
/* NOSTRICT */
|
|
_uintmax = (u_long)va_arg(ap, void *);
|
|
base = HEX;
|
|
xdigs = "0123456789abcdef";
|
|
flags |= 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':
|
|
_uintmax = UARG();
|
|
base = DEC;
|
|
goto nosign;
|
|
case 'X':
|
|
xdigs = "0123456789ABCDEF";
|
|
goto hex;
|
|
case 'x':
|
|
xdigs = "0123456789abcdef";
|
|
hex: _uintmax = UARG();
|
|
base = HEX;
|
|
/* leading 0x/X only if non-zero */
|
|
if (flags & ALT && _uintmax != 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
|
|
*/
|
|
bp = buf + BUF;
|
|
if (_uintmax != 0 || prec != 0) {
|
|
/*
|
|
* Unsigned mod is hard, and unsigned mod
|
|
* by a constant is easier than that by
|
|
* a variable; hence this switch.
|
|
*/
|
|
switch (base) {
|
|
case OCT:
|
|
do {
|
|
*--bp = to_char(_uintmax & 7);
|
|
_uintmax >>= 3;
|
|
} while (_uintmax);
|
|
/* handle octal leading 0 */
|
|
if (flags & ALT && *bp != '0')
|
|
*--bp = '0';
|
|
break;
|
|
|
|
case DEC:
|
|
/* many numbers are 1 digit */
|
|
while (_uintmax >= 10) {
|
|
*--bp = to_char(_uintmax % 10);
|
|
_uintmax /= 10;
|
|
}
|
|
*--bp = to_char(_uintmax);
|
|
break;
|
|
|
|
case HEX:
|
|
do {
|
|
*--bp = xdigs[(size_t)
|
|
(_uintmax & 15)];
|
|
_uintmax >>= 4;
|
|
} while (_uintmax);
|
|
break;
|
|
|
|
default:
|
|
cp = "bug in vfprintf: bad base";
|
|
size = strlen(cp);
|
|
goto skipsize;
|
|
}
|
|
}
|
|
cp = bp;
|
|
size = buf + BUF - bp;
|
|
skipsize:
|
|
break;
|
|
default: /* "%?" prints ?, unless ? is NUL */
|
|
if (ch == '\0')
|
|
goto done;
|
|
/* pretend it was %c with argument ch */
|
|
*buf = ch;
|
|
cp = buf;
|
|
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 */
|
|
PRINT("0", 1);
|
|
if (expt < ndig || (flags & ALT) != 0) {
|
|
PRINT(decimal_point, 1);
|
|
PAD(ndig - 1, zeroes);
|
|
}
|
|
} else if (expt <= 0) {
|
|
PRINT("0", 1);
|
|
PRINT(decimal_point, 1);
|
|
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 = -1;
|
|
FUNLOCKFILE(fp);
|
|
return (ret);
|
|
}
|
|
|
|
#ifdef FLOATING_POINT
|
|
|
|
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;
|
|
|
|
_DIAGASSERT(decpt != NULL);
|
|
_DIAGASSERT(length != NULL);
|
|
_DIAGASSERT(sign != NULL);
|
|
|
|
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 */
|
|
}
|
|
|
|
digits = __dtoa(value, mode, ndigits, decpt, &dsgn, &rve);
|
|
if (dsgn) {
|
|
value = -value;
|
|
*sign = '-';
|
|
} else
|
|
*sign = '\000';
|
|
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, expon, fmtch)
|
|
char *p0;
|
|
int expon, fmtch;
|
|
{
|
|
char *p, *t;
|
|
char expbuf[MAXEXP];
|
|
|
|
_DIAGASSERT(p0 != NULL);
|
|
|
|
p = p0;
|
|
*p++ = fmtch;
|
|
if (expon < 0) {
|
|
expon = -expon;
|
|
*p++ = '-';
|
|
}
|
|
else
|
|
*p++ = '+';
|
|
t = expbuf + MAXEXP;
|
|
if (expon > 9) {
|
|
do {
|
|
*--t = to_char(expon % 10);
|
|
} while ((expon /= 10) > 9);
|
|
*--t = to_char(expon);
|
|
for (; t < expbuf + MAXEXP; *p++ = *t++);
|
|
}
|
|
else {
|
|
*p++ = '0';
|
|
*p++ = to_char(expon);
|
|
}
|
|
return (p - p0);
|
|
}
|
|
#endif /* FLOATING_POINT */
|