1469 lines
35 KiB
C
1469 lines
35 KiB
C
/*-
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* Copyright (c) 1990, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* Chris Torek.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#if defined(LIBC_SCCS) && !defined(lint)
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#if 0
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static char sccsid[] = "@(#)vfprintf.c 8.1 (Berkeley) 6/4/93";
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#endif
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static const char rcsid[] =
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"$FreeBSD$";
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#endif /* LIBC_SCCS and not lint */
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/*
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* Actual printf innards.
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*
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* This code is large and complicated...
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*/
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#include "namespace.h"
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#include <sys/types.h>
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#include <ctype.h>
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#include <limits.h>
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#include <locale.h>
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#include <stddef.h>
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#include <stdint.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#if __STDC__
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#include <stdarg.h>
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#else
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#include <varargs.h>
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#endif
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#include "un-namespace.h"
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#include "libc_private.h"
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#include "local.h"
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#include "fvwrite.h"
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/* Define FLOATING_POINT to get floating point. */
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#define FLOATING_POINT
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union arg {
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int intarg;
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u_int uintarg;
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long longarg;
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u_long ulongarg;
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long long longlongarg;
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unsigned long long ulonglongarg;
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ptrdiff_t ptrdiffarg;
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size_t sizearg;
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intmax_t intmaxarg;
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uintmax_t uintmaxarg;
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void *pvoidarg;
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char *pchararg;
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signed char *pschararg;
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short *pshortarg;
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int *pintarg;
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long *plongarg;
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long long *plonglongarg;
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ptrdiff_t *pptrdiffarg;
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size_t *psizearg;
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intmax_t *pintmaxarg;
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#ifdef FLOATING_POINT
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double doublearg;
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long double longdoublearg;
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#endif
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};
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/*
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* Type ids for argument type table.
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*/
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enum typeid {
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T_UNUSED, TP_SHORT, T_INT, T_U_INT, TP_INT,
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T_LONG, T_U_LONG, TP_LONG, T_LLONG, T_U_LLONG, TP_LLONG,
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T_PTRDIFFT, TP_PTRDIFFT, T_SIZET, TP_SIZET,
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T_INTMAXT, T_UINTMAXT, TP_INTMAXT, TP_VOID, TP_CHAR, TP_SCHAR,
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T_DOUBLE, T_LONG_DOUBLE
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};
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static int __sprint __P((FILE *, struct __suio *));
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static int __sbprintf __P((FILE *, const char *, va_list)) __printflike(2, 0);
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static char *__ujtoa __P((uintmax_t, char *, int, int, char *, int,
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char, const char *));
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static char *__ultoa __P((u_long, char *, int, int, char *, int,
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char, const char *));
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static void __find_arguments __P((const char *, va_list, union arg **));
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static void __grow_type_table __P((int, enum typeid **, int *));
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/*
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* Flush out all the vectors defined by the given uio,
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* then reset it so that it can be reused.
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*/
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static int
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__sprint(FILE *fp, struct __suio *uio)
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{
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int err;
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if (uio->uio_resid == 0) {
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uio->uio_iovcnt = 0;
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return (0);
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}
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err = __sfvwrite(fp, uio);
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uio->uio_resid = 0;
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uio->uio_iovcnt = 0;
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return (err);
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}
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/*
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* Helper function for `fprintf to unbuffered unix file': creates a
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* temporary buffer. We only work on write-only files; this avoids
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* worries about ungetc buffers and so forth.
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*/
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static int
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__sbprintf(FILE *fp, const char *fmt, va_list ap)
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{
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int ret;
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FILE fake;
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unsigned char buf[BUFSIZ];
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/* copy the important variables */
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fake._flags = fp->_flags & ~__SNBF;
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fake._file = fp->_file;
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fake._cookie = fp->_cookie;
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fake._write = fp->_write;
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/* set up the buffer */
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fake._bf._base = fake._p = buf;
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fake._bf._size = fake._w = sizeof(buf);
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fake._lbfsize = 0; /* not actually used, but Just In Case */
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/* do the work, then copy any error status */
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ret = __vfprintf(&fake, fmt, ap);
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if (ret >= 0 && __fflush(&fake))
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ret = EOF;
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if (fake._flags & __SERR)
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fp->_flags |= __SERR;
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return (ret);
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}
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/*
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* Macros for converting digits to letters and vice versa
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*/
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#define to_digit(c) ((c) - '0')
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#define is_digit(c) ((unsigned)to_digit(c) <= 9)
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#define to_char(n) ((n) + '0')
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/*
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* Convert an unsigned long to ASCII for printf purposes, returning
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* a pointer to the first character of the string representation.
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* Octal numbers can be forced to have a leading zero; hex numbers
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* use the given digits.
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*/
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static char *
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__ultoa(u_long val, char *endp, int base, int octzero, char *xdigs,
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int needgrp, char thousep, const char *grp)
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{
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register char *cp = endp;
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register long sval;
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int ndig;
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/*
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* Handle the three cases separately, in the hope of getting
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* better/faster code.
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*/
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switch (base) {
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case 10:
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if (val < 10) { /* many numbers are 1 digit */
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*--cp = to_char(val);
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return (cp);
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}
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ndig = 0;
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/*
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* On many machines, unsigned arithmetic is harder than
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* signed arithmetic, so we do at most one unsigned mod and
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* divide; this is sufficient to reduce the range of
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* the incoming value to where signed arithmetic works.
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*/
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if (val > LONG_MAX) {
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*--cp = to_char(val % 10);
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ndig++;
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sval = val / 10;
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} else
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sval = val;
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do {
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*--cp = to_char(sval % 10);
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ndig++;
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/*
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* If (*grp == CHAR_MAX) then no more grouping
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* should be performed.
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*/
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if (needgrp && ndig == *grp && *grp != CHAR_MAX
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&& sval > 9) {
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*--cp = thousep;
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ndig = 0;
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/*
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* If (*(grp+1) == '\0') then we have to
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* use *grp character (last grouping rule)
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* for all next cases
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*/
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if (*(grp+1) != '\0')
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grp++;
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}
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sval /= 10;
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} while (sval != 0);
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break;
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case 8:
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do {
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*--cp = to_char(val & 7);
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val >>= 3;
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} while (val);
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if (octzero && *cp != '0')
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*--cp = '0';
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break;
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case 16:
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do {
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*--cp = xdigs[val & 15];
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val >>= 4;
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} while (val);
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break;
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default: /* oops */
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abort();
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}
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return (cp);
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}
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/* Identical to __ultoa, but for intmax_t. */
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static char *
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__ujtoa(uintmax_t val, char *endp, int base, int octzero, char *xdigs,
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int needgrp, char thousep, const char *grp)
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{
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char *cp = endp;
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intmax_t sval;
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int ndig;
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/* quick test for small values; __ultoa is typically much faster */
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/* (perhaps instead we should run until small, then call __ultoa?) */
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if (val <= ULONG_MAX)
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return (__ultoa((u_long)val, endp, base, octzero, xdigs,
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needgrp, thousep, grp));
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switch (base) {
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case 10:
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if (val < 10) {
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*--cp = to_char(val % 10);
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return (cp);
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}
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ndig = 0;
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if (val > INTMAX_MAX) {
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*--cp = to_char(val % 10);
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ndig++;
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sval = val / 10;
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} else
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sval = val;
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do {
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*--cp = to_char(sval % 10);
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ndig++;
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/*
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* If (*grp == CHAR_MAX) then no more grouping
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* should be performed.
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*/
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if (needgrp && *grp != CHAR_MAX && ndig == *grp
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&& sval > 9) {
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*--cp = thousep;
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ndig = 0;
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/*
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* If (*(grp+1) == '\0') then we have to
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* use *grp character (last grouping rule)
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* for all next cases
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*/
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if (*(grp+1) != '\0')
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grp++;
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}
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sval /= 10;
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} while (sval != 0);
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break;
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case 8:
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do {
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*--cp = to_char(val & 7);
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val >>= 3;
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} while (val);
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if (octzero && *cp != '0')
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*--cp = '0';
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break;
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case 16:
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do {
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*--cp = xdigs[val & 15];
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val >>= 4;
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} while (val);
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break;
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default:
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abort();
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}
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return (cp);
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}
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/*
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* MT-safe version
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*/
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int
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vfprintf(FILE *fp, const char *fmt0, va_list ap)
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{
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int ret;
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FLOCKFILE(fp);
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ret = __vfprintf(fp, fmt0, ap);
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FUNLOCKFILE(fp);
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return (ret);
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}
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#ifdef FLOATING_POINT
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#include <math.h>
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#include "floatio.h"
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#define BUF ((MAXEXP*2)+MAXFRACT+1) /* + decimal point */
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#define DEFPREC 6
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static char *cvt __P((double, int, int, char *, int *, int, int *, char **));
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static int exponent __P((char *, int, int));
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#else /* no FLOATING_POINT */
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#define BUF 136
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#endif /* FLOATING_POINT */
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#define STATIC_ARG_TBL_SIZE 8 /* Size of static argument table. */
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/*
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* Flags used during conversion.
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*/
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#define ALT 0x001 /* alternate form */
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#define HEXPREFIX 0x002 /* add 0x or 0X prefix */
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#define LADJUST 0x004 /* left adjustment */
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#define LONGDBL 0x008 /* long double */
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#define LONGINT 0x010 /* long integer */
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#define LLONGINT 0x020 /* long long integer */
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#define SHORTINT 0x040 /* short integer */
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#define ZEROPAD 0x080 /* zero (as opposed to blank) pad */
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#define FPT 0x100 /* Floating point number */
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#define GROUPING 0x200 /* use grouping ("'" flag) */
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/* C99 additional size modifiers: */
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#define SIZET 0x400 /* size_t */
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#define PTRDIFFT 0x800 /* ptrdiff_t */
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#define INTMAXT 0x1000 /* intmax_t */
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#define CHARINT 0x2000 /* print char using int format */
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/*
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* Non-MT-safe version
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*/
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int
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__vfprintf(FILE *fp, const char *fmt0, va_list ap)
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{
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char *fmt; /* format string */
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int ch; /* character from fmt */
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int n, n2; /* handy integer (short term usage) */
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char *cp; /* handy char pointer (short term usage) */
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struct __siov *iovp; /* for PRINT macro */
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int flags; /* flags as above */
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int ret; /* return value accumulator */
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int width; /* width from format (%8d), or 0 */
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int prec; /* precision from format (%.3d), or -1 */
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char sign; /* sign prefix (' ', '+', '-', or \0) */
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char thousands_sep; /* locale specific thousands separator */
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const char *grouping; /* locale specific numeric grouping rules */
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#ifdef FLOATING_POINT
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char *decimal_point; /* locale specific decimal point */
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char softsign; /* temporary negative sign for floats */
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double _double; /* double precision arguments %[eEfgG] */
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int expt; /* integer value of exponent */
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int expsize; /* character count for expstr */
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int ndig; /* actual number of digits returned by cvt */
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char expstr[7]; /* buffer for exponent string */
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char *dtoaresult; /* buffer allocated by dtoa */
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#endif
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u_long ulval; /* integer arguments %[diouxX] */
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uintmax_t ujval; /* %j, %ll, %q, %t, %z integers */
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int base; /* base for [diouxX] conversion */
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int dprec; /* a copy of prec if [diouxX], 0 otherwise */
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int realsz; /* field size expanded by dprec, sign, etc */
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int size; /* size of converted field or string */
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int prsize; /* max size of printed field */
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char *xdigs; /* digits for [xX] conversion */
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#define NIOV 8
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struct __suio uio; /* output information: summary */
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|
struct __siov iov[NIOV];/* ... and individual io vectors */
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|
char buf[BUF]; /* space for %c, %[diouxX], %[eEfFgG] */
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|
char ox[2]; /* space for 0x hex-prefix */
|
|
union arg *argtable; /* args, built due to positional arg */
|
|
union arg statargtable [STATIC_ARG_TBL_SIZE];
|
|
int nextarg; /* 1-based argument index */
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va_list orgap; /* original argument pointer */
|
|
|
|
/*
|
|
* Choose PADSIZE to trade efficiency vs. size. If larger printf
|
|
* fields occur frequently, increase PADSIZE and make the initialisers
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|
* below longer.
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|
*/
|
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#define PADSIZE 16 /* pad chunk size */
|
|
static char blanks[PADSIZE] =
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{' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' '};
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static char zeroes[PADSIZE] =
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{'0','0','0','0','0','0','0','0','0','0','0','0','0','0','0','0'};
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|
|
|
/*
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|
* BEWARE, these `goto error' on error, and PAD uses `n'.
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|
*/
|
|
#define PRINT(ptr, len) { \
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iovp->iov_base = (ptr); \
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iovp->iov_len = (len); \
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uio.uio_resid += (len); \
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iovp++; \
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if (++uio.uio_iovcnt >= NIOV) { \
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if (__sprint(fp, &uio)) \
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goto error; \
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iovp = iov; \
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|
} \
|
|
}
|
|
#define PAD(howmany, with) { \
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|
if ((n = (howmany)) > 0) { \
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|
while (n > PADSIZE) { \
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PRINT(with, PADSIZE); \
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n -= PADSIZE; \
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|
} \
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PRINT(with, n); \
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|
} \
|
|
}
|
|
#define FLUSH() { \
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|
if (uio.uio_resid && __sprint(fp, &uio)) \
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goto error; \
|
|
uio.uio_iovcnt = 0; \
|
|
iovp = iov; \
|
|
}
|
|
|
|
/*
|
|
* Get the argument indexed by nextarg. If the argument table is
|
|
* built, use it to get the argument. If its not, get the next
|
|
* argument (and arguments must be gotten sequentially).
|
|
*/
|
|
#define GETARG(type) \
|
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((argtable != NULL) ? *((type*)(&argtable[nextarg++])) : \
|
|
(nextarg++, va_arg(ap, type)))
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|
|
|
/*
|
|
* To extend shorts properly, we need both signed and unsigned
|
|
* argument extraction methods.
|
|
*/
|
|
#define SARG() \
|
|
(flags&LONGINT ? GETARG(long) : \
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|
flags&SHORTINT ? (long)(short)GETARG(int) : \
|
|
flags&CHARINT ? (long)(signed char)GETARG(int) : \
|
|
(long)GETARG(int))
|
|
#define UARG() \
|
|
(flags&LONGINT ? GETARG(u_long) : \
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|
flags&SHORTINT ? (u_long)(u_short)GETARG(int) : \
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|
flags&CHARINT ? (u_long)(u_char)GETARG(int) : \
|
|
(u_long)GETARG(u_int))
|
|
#define INTMAX_SIZE (INTMAXT|SIZET|PTRDIFFT|LLONGINT)
|
|
#define SJARG() \
|
|
(flags&INTMAXT ? GETARG(intmax_t) : \
|
|
flags&SIZET ? (intmax_t)GETARG(size_t) : \
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|
flags&PTRDIFFT ? (intmax_t)GETARG(ptrdiff_t) : \
|
|
(intmax_t)GETARG(long long))
|
|
#define UJARG() \
|
|
(flags&INTMAXT ? GETARG(uintmax_t) : \
|
|
flags&SIZET ? (uintmax_t)GETARG(size_t) : \
|
|
flags&PTRDIFFT ? (uintmax_t)GETARG(ptrdiff_t) : \
|
|
(uintmax_t)GETARG(unsigned long long))
|
|
|
|
/*
|
|
* Get * arguments, including the form *nn$. Preserve the nextarg
|
|
* that the argument can be gotten once the type is determined.
|
|
*/
|
|
#define GETASTER(val) \
|
|
n2 = 0; \
|
|
cp = fmt; \
|
|
while (is_digit(*cp)) { \
|
|
n2 = 10 * n2 + to_digit(*cp); \
|
|
cp++; \
|
|
} \
|
|
if (*cp == '$') { \
|
|
int hold = nextarg; \
|
|
if (argtable == NULL) { \
|
|
argtable = statargtable; \
|
|
__find_arguments (fmt0, orgap, &argtable); \
|
|
} \
|
|
nextarg = n2; \
|
|
val = GETARG (int); \
|
|
nextarg = hold; \
|
|
fmt = ++cp; \
|
|
} else { \
|
|
val = GETARG (int); \
|
|
}
|
|
|
|
|
|
thousands_sep = '\0';
|
|
grouping = NULL;
|
|
#ifdef FLOATING_POINT
|
|
dtoaresult = NULL;
|
|
decimal_point = localeconv()->decimal_point;
|
|
#endif
|
|
/* sorry, fprintf(read_only_file, "") returns EOF, not 0 */
|
|
if (cantwrite(fp))
|
|
return (EOF);
|
|
|
|
/* optimise fprintf(stderr) (and other unbuffered Unix files) */
|
|
if ((fp->_flags & (__SNBF|__SWR|__SRW)) == (__SNBF|__SWR) &&
|
|
fp->_file >= 0)
|
|
return (__sbprintf(fp, fmt0, ap));
|
|
|
|
fmt = (char *)fmt0;
|
|
argtable = NULL;
|
|
nextarg = 1;
|
|
orgap = ap;
|
|
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) {
|
|
if ((unsigned)ret + n > INT_MAX) {
|
|
ret = EOF;
|
|
goto error;
|
|
}
|
|
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.
|
|
*/
|
|
GETASTER (width);
|
|
if (width >= 0)
|
|
goto rflag;
|
|
width = -width;
|
|
/* FALLTHROUGH */
|
|
case '-':
|
|
flags |= LADJUST;
|
|
goto rflag;
|
|
case '+':
|
|
sign = '+';
|
|
goto rflag;
|
|
case '\'':
|
|
flags |= GROUPING;
|
|
thousands_sep = *(localeconv()->thousands_sep);
|
|
grouping = localeconv()->grouping;
|
|
goto rflag;
|
|
case '.':
|
|
if ((ch = *fmt++) == '*') {
|
|
GETASTER (n);
|
|
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));
|
|
if (ch == '$') {
|
|
nextarg = n;
|
|
if (argtable == NULL) {
|
|
argtable = statargtable;
|
|
__find_arguments (fmt0, orgap,
|
|
&argtable);
|
|
}
|
|
goto rflag;
|
|
}
|
|
width = n;
|
|
goto reswitch;
|
|
#ifdef FLOATING_POINT
|
|
case 'L':
|
|
flags |= LONGDBL;
|
|
goto rflag;
|
|
#endif
|
|
case 'h':
|
|
if (flags & SHORTINT) {
|
|
flags &= ~SHORTINT;
|
|
flags |= CHARINT;
|
|
} else
|
|
flags |= SHORTINT;
|
|
goto rflag;
|
|
case 'j':
|
|
flags |= INTMAXT;
|
|
goto rflag;
|
|
case 'l':
|
|
if (flags & LONGINT) {
|
|
flags &= ~LONGINT;
|
|
flags |= LLONGINT;
|
|
} else
|
|
flags |= LONGINT;
|
|
goto rflag;
|
|
case 'q':
|
|
flags |= LLONGINT; /* not necessarily */
|
|
goto rflag;
|
|
case 't':
|
|
flags |= PTRDIFFT;
|
|
goto rflag;
|
|
case 'z':
|
|
flags |= SIZET;
|
|
goto rflag;
|
|
case 'c':
|
|
*(cp = buf) = GETARG(int);
|
|
size = 1;
|
|
sign = '\0';
|
|
break;
|
|
case 'D':
|
|
flags |= LONGINT;
|
|
/*FALLTHROUGH*/
|
|
case 'd':
|
|
case 'i':
|
|
if (flags & INTMAX_SIZE) {
|
|
ujval = SJARG();
|
|
if ((intmax_t)ujval < 0) {
|
|
ujval = -ujval;
|
|
sign = '-';
|
|
}
|
|
} else {
|
|
ulval = SARG();
|
|
if ((long)ulval < 0) {
|
|
ulval = -ulval;
|
|
sign = '-';
|
|
}
|
|
}
|
|
base = 10;
|
|
goto number;
|
|
#ifdef FLOATING_POINT
|
|
#ifdef HEXFLOAT
|
|
case 'a':
|
|
case 'A':
|
|
#endif
|
|
case 'e':
|
|
case 'E':
|
|
/*-
|
|
* Grouping apply to %i, %d, %u, %f, %F, %g, %G
|
|
* conversion specifiers only. For other conversions
|
|
* behavior is undefined.
|
|
* -- POSIX
|
|
*/
|
|
flags &= ~GROUPING;
|
|
/*FALLTHROUGH*/
|
|
case 'f':
|
|
case 'F':
|
|
goto fp_begin;
|
|
case 'g':
|
|
case 'G':
|
|
if (prec == 0)
|
|
prec = 1;
|
|
fp_begin: if (prec == -1)
|
|
prec = DEFPREC;
|
|
if (flags & LONGDBL)
|
|
/* XXX this loses precision. */
|
|
_double = (double)GETARG(long double);
|
|
else
|
|
_double = GETARG(double);
|
|
/* do this before tricky precision changes */
|
|
if (isinf(_double)) {
|
|
if (_double < 0)
|
|
sign = '-';
|
|
if (isupper(ch))
|
|
cp = "INF";
|
|
else
|
|
cp = "inf";
|
|
size = 3;
|
|
break;
|
|
}
|
|
if (isnan(_double)) {
|
|
if (isupper(ch))
|
|
cp = "NAN";
|
|
else
|
|
cp = "nan";
|
|
size = 3;
|
|
break;
|
|
}
|
|
flags |= FPT;
|
|
if (dtoaresult != NULL) {
|
|
free(dtoaresult);
|
|
dtoaresult = NULL;
|
|
}
|
|
cp = cvt(_double, prec, flags, &softsign,
|
|
&expt, ch, &ndig, &dtoaresult);
|
|
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':
|
|
/*
|
|
* Assignment-like behavior is specified if the
|
|
* value overflows or is otherwise unrepresentable.
|
|
* C99 says to use `signed char' for %hhn conversions.
|
|
*/
|
|
if (flags & LLONGINT)
|
|
*GETARG(long long *) = ret;
|
|
else if (flags & SIZET)
|
|
*GETARG(ssize_t *) = (ssize_t)ret;
|
|
else if (flags & PTRDIFFT)
|
|
*GETARG(ptrdiff_t *) = ret;
|
|
else if (flags & INTMAXT)
|
|
*GETARG(intmax_t *) = ret;
|
|
else if (flags & LONGINT)
|
|
*GETARG(long *) = ret;
|
|
else if (flags & SHORTINT)
|
|
*GETARG(short *) = ret;
|
|
else if (flags & CHARINT)
|
|
*GETARG(signed char *) = ret;
|
|
else
|
|
*GETARG(int *) = ret;
|
|
continue; /* no output */
|
|
case 'O':
|
|
flags |= LONGINT;
|
|
/*FALLTHROUGH*/
|
|
case 'o':
|
|
if (flags & INTMAX_SIZE)
|
|
ujval = UJARG();
|
|
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
|
|
*/
|
|
ujval = (uintmax_t)(uintptr_t)GETARG(void *);
|
|
base = 16;
|
|
xdigs = "0123456789abcdef";
|
|
flags = flags | INTMAXT | HEXPREFIX;
|
|
ch = 'x';
|
|
goto nosign;
|
|
case 's':
|
|
if ((cp = GETARG(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 & INTMAX_SIZE)
|
|
ujval = UJARG();
|
|
else
|
|
ulval = UARG();
|
|
base = 10;
|
|
goto nosign;
|
|
case 'X':
|
|
xdigs = "0123456789ABCDEF";
|
|
goto hex;
|
|
case 'x':
|
|
xdigs = "0123456789abcdef";
|
|
hex:
|
|
if (flags & INTMAX_SIZE)
|
|
ujval = UJARG();
|
|
else
|
|
ulval = UARG();
|
|
base = 16;
|
|
/* leading 0x/X only if non-zero */
|
|
if (flags & ALT &&
|
|
(flags & INTMAX_SIZE ? ujval != 0 : ulval != 0))
|
|
flags |= HEXPREFIX;
|
|
|
|
flags &= ~GROUPING;
|
|
/* 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 & INTMAX_SIZE) {
|
|
if (ujval != 0 || prec != 0)
|
|
cp = __ujtoa(ujval, cp, base,
|
|
flags & ALT, xdigs,
|
|
flags & GROUPING, thousands_sep,
|
|
grouping);
|
|
} else {
|
|
if (ulval != 0 || prec != 0)
|
|
cp = __ultoa(ulval, cp, base,
|
|
flags & ALT, xdigs,
|
|
flags & GROUPING, thousands_sep,
|
|
grouping);
|
|
}
|
|
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;
|
|
|
|
prsize = width > realsz ? width : realsz;
|
|
if ((unsigned)ret + prsize > INT_MAX) {
|
|
ret = EOF;
|
|
goto error;
|
|
}
|
|
|
|
/* 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(decimal_point, 1);
|
|
} else {
|
|
PRINT(cp, expt);
|
|
cp += expt;
|
|
PRINT(decimal_point, 1);
|
|
PRINT(cp, ndig-expt);
|
|
}
|
|
} else { /* 'e' or 'E' */
|
|
if (ndig > 1 || flags & ALT) {
|
|
ox[0] = *cp++;
|
|
ox[1] = *decimal_point;
|
|
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 += prsize;
|
|
|
|
FLUSH(); /* copy out the I/O vectors */
|
|
}
|
|
done:
|
|
FLUSH();
|
|
error:
|
|
#ifdef FLOATING_POINT
|
|
if (dtoaresult != NULL)
|
|
free(dtoaresult);
|
|
#endif
|
|
if (__sferror(fp))
|
|
ret = EOF;
|
|
if ((argtable != NULL) && (argtable != statargtable))
|
|
free (argtable);
|
|
return (ret);
|
|
/* NOTREACHED */
|
|
}
|
|
|
|
/*
|
|
* Find all arguments when a positional parameter is encountered. Returns a
|
|
* table, indexed by argument number, of pointers to each arguments. The
|
|
* initial argument table should be an array of STATIC_ARG_TBL_SIZE entries.
|
|
* It will be replaces with a malloc-ed one if it overflows.
|
|
*/
|
|
static void
|
|
__find_arguments (const char *fmt0, va_list ap, union arg **argtable)
|
|
{
|
|
char *fmt; /* format string */
|
|
int ch; /* character from fmt */
|
|
int n, n2; /* handy integer (short term usage) */
|
|
char *cp; /* handy char pointer (short term usage) */
|
|
int flags; /* flags as above */
|
|
int width; /* width from format (%8d), or 0 */
|
|
enum typeid *typetable; /* table of types */
|
|
enum typeid stattypetable [STATIC_ARG_TBL_SIZE];
|
|
int tablesize; /* current size of type table */
|
|
int tablemax; /* largest used index in table */
|
|
int nextarg; /* 1-based argument index */
|
|
|
|
/*
|
|
* Add an argument type to the table, expanding if necessary.
|
|
*/
|
|
#define ADDTYPE(type) \
|
|
((nextarg >= tablesize) ? \
|
|
__grow_type_table(nextarg, &typetable, &tablesize) : 0, \
|
|
(nextarg > tablemax) ? tablemax = nextarg : 0, \
|
|
typetable[nextarg++] = type)
|
|
|
|
#define ADDSARG() \
|
|
((flags&INTMAXT) ? ADDTYPE(T_INTMAXT) : \
|
|
((flags&SIZET) ? ADDTYPE(T_SIZET) : \
|
|
((flags&PTRDIFFT) ? ADDTYPE(T_PTRDIFFT) : \
|
|
((flags&LLONGINT) ? ADDTYPE(T_LLONG) : \
|
|
((flags&LONGINT) ? ADDTYPE(T_LONG) : ADDTYPE(T_INT))))))
|
|
|
|
#define ADDUARG() \
|
|
((flags&INTMAXT) ? ADDTYPE(T_UINTMAXT) : \
|
|
((flags&SIZET) ? ADDTYPE(T_SIZET) : \
|
|
((flags&PTRDIFFT) ? ADDTYPE(T_PTRDIFFT) : \
|
|
((flags&LLONGINT) ? ADDTYPE(T_U_LLONG) : \
|
|
((flags&LONGINT) ? ADDTYPE(T_U_LONG) : ADDTYPE(T_U_INT))))))
|
|
|
|
/*
|
|
* Add * arguments to the type array.
|
|
*/
|
|
#define ADDASTER() \
|
|
n2 = 0; \
|
|
cp = fmt; \
|
|
while (is_digit(*cp)) { \
|
|
n2 = 10 * n2 + to_digit(*cp); \
|
|
cp++; \
|
|
} \
|
|
if (*cp == '$') { \
|
|
int hold = nextarg; \
|
|
nextarg = n2; \
|
|
ADDTYPE (T_INT); \
|
|
nextarg = hold; \
|
|
fmt = ++cp; \
|
|
} else { \
|
|
ADDTYPE (T_INT); \
|
|
}
|
|
fmt = (char *)fmt0;
|
|
typetable = stattypetable;
|
|
tablesize = STATIC_ARG_TBL_SIZE;
|
|
tablemax = 0;
|
|
nextarg = 1;
|
|
memset (typetable, T_UNUSED, STATIC_ARG_TBL_SIZE);
|
|
|
|
/*
|
|
* Scan the format for conversions (`%' character).
|
|
*/
|
|
for (;;) {
|
|
for (cp = fmt; (ch = *fmt) != '\0' && ch != '%'; fmt++)
|
|
/* void */;
|
|
if (ch == '\0')
|
|
goto done;
|
|
fmt++; /* skip over '%' */
|
|
|
|
flags = 0;
|
|
width = 0;
|
|
|
|
rflag: ch = *fmt++;
|
|
reswitch: switch (ch) {
|
|
case ' ':
|
|
case '#':
|
|
goto rflag;
|
|
case '*':
|
|
ADDASTER ();
|
|
goto rflag;
|
|
case '-':
|
|
case '+':
|
|
case '\'':
|
|
goto rflag;
|
|
case '.':
|
|
if ((ch = *fmt++) == '*') {
|
|
ADDASTER ();
|
|
goto rflag;
|
|
}
|
|
while (is_digit(ch)) {
|
|
ch = *fmt++;
|
|
}
|
|
goto reswitch;
|
|
case '0':
|
|
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));
|
|
if (ch == '$') {
|
|
nextarg = n;
|
|
goto rflag;
|
|
}
|
|
width = n;
|
|
goto reswitch;
|
|
#ifdef FLOATING_POINT
|
|
case 'L':
|
|
flags |= LONGDBL;
|
|
goto rflag;
|
|
#endif
|
|
case 'h':
|
|
if (flags & SHORTINT) {
|
|
flags &= ~SHORTINT;
|
|
flags |= CHARINT;
|
|
} else
|
|
flags |= SHORTINT;
|
|
goto rflag;
|
|
case 'j':
|
|
flags |= INTMAXT;
|
|
goto rflag;
|
|
case 'l':
|
|
if (flags & LONGINT) {
|
|
flags &= ~LONGINT;
|
|
flags |= LLONGINT;
|
|
} else
|
|
flags |= LONGINT;
|
|
goto rflag;
|
|
case 'q':
|
|
flags |= LLONGINT; /* not necessarily */
|
|
goto rflag;
|
|
case 't':
|
|
flags |= PTRDIFFT;
|
|
goto rflag;
|
|
case 'z':
|
|
flags |= SIZET;
|
|
goto rflag;
|
|
case 'c':
|
|
ADDTYPE(T_INT);
|
|
break;
|
|
case 'D':
|
|
flags |= LONGINT;
|
|
/*FALLTHROUGH*/
|
|
case 'd':
|
|
case 'i':
|
|
ADDSARG();
|
|
break;
|
|
#ifdef FLOATING_POINT
|
|
#ifdef HEXFLOAT
|
|
case 'a':
|
|
case 'A':
|
|
#endif
|
|
case 'e':
|
|
case 'E':
|
|
case 'f':
|
|
case 'g':
|
|
case 'G':
|
|
if (flags & LONGDBL)
|
|
ADDTYPE(T_LONG_DOUBLE);
|
|
else
|
|
ADDTYPE(T_DOUBLE);
|
|
break;
|
|
#endif /* FLOATING_POINT */
|
|
case 'n':
|
|
if (flags & INTMAXT)
|
|
ADDTYPE(TP_INTMAXT);
|
|
else if (flags & PTRDIFFT)
|
|
ADDTYPE(TP_PTRDIFFT);
|
|
else if (flags & SIZET)
|
|
ADDTYPE(TP_SIZET);
|
|
else if (flags & LLONGINT)
|
|
ADDTYPE(TP_LLONG);
|
|
else if (flags & LONGINT)
|
|
ADDTYPE(TP_LONG);
|
|
else if (flags & SHORTINT)
|
|
ADDTYPE(TP_SHORT);
|
|
else if (flags & CHARINT)
|
|
ADDTYPE(TP_SCHAR);
|
|
else
|
|
ADDTYPE(TP_INT);
|
|
continue; /* no output */
|
|
case 'O':
|
|
flags |= LONGINT;
|
|
/*FALLTHROUGH*/
|
|
case 'o':
|
|
ADDUARG();
|
|
break;
|
|
case 'p':
|
|
ADDTYPE(TP_VOID);
|
|
break;
|
|
case 's':
|
|
ADDTYPE(TP_CHAR);
|
|
break;
|
|
case 'U':
|
|
flags |= LONGINT;
|
|
/*FALLTHROUGH*/
|
|
case 'u':
|
|
case 'X':
|
|
case 'x':
|
|
ADDUARG();
|
|
break;
|
|
default: /* "%?" prints ?, unless ? is NUL */
|
|
if (ch == '\0')
|
|
goto done;
|
|
break;
|
|
}
|
|
}
|
|
done:
|
|
/*
|
|
* Build the argument table.
|
|
*/
|
|
if (tablemax >= STATIC_ARG_TBL_SIZE) {
|
|
*argtable = (union arg *)
|
|
malloc (sizeof (union arg) * (tablemax + 1));
|
|
}
|
|
|
|
(*argtable) [0].intarg = 0;
|
|
for (n = 1; n <= tablemax; n++) {
|
|
switch (typetable [n]) {
|
|
case T_UNUSED: /* whoops! */
|
|
(*argtable) [n].intarg = va_arg (ap, int);
|
|
break;
|
|
case TP_SCHAR:
|
|
(*argtable) [n].pschararg = va_arg (ap, signed char *);
|
|
break;
|
|
case TP_SHORT:
|
|
(*argtable) [n].pshortarg = va_arg (ap, short *);
|
|
break;
|
|
case T_INT:
|
|
(*argtable) [n].intarg = va_arg (ap, int);
|
|
break;
|
|
case T_U_INT:
|
|
(*argtable) [n].uintarg = va_arg (ap, unsigned int);
|
|
break;
|
|
case TP_INT:
|
|
(*argtable) [n].pintarg = va_arg (ap, int *);
|
|
break;
|
|
case T_LONG:
|
|
(*argtable) [n].longarg = va_arg (ap, long);
|
|
break;
|
|
case T_U_LONG:
|
|
(*argtable) [n].ulongarg = va_arg (ap, unsigned long);
|
|
break;
|
|
case TP_LONG:
|
|
(*argtable) [n].plongarg = va_arg (ap, long *);
|
|
break;
|
|
case T_LLONG:
|
|
(*argtable) [n].longlongarg = va_arg (ap, long long);
|
|
break;
|
|
case T_U_LLONG:
|
|
(*argtable) [n].ulonglongarg = va_arg (ap, unsigned long long);
|
|
break;
|
|
case TP_LLONG:
|
|
(*argtable) [n].plonglongarg = va_arg (ap, long long *);
|
|
break;
|
|
case T_PTRDIFFT:
|
|
(*argtable) [n].ptrdiffarg = va_arg (ap, ptrdiff_t);
|
|
break;
|
|
case TP_PTRDIFFT:
|
|
(*argtable) [n].pptrdiffarg = va_arg (ap, ptrdiff_t *);
|
|
break;
|
|
case T_SIZET:
|
|
(*argtable) [n].sizearg = va_arg (ap, size_t);
|
|
break;
|
|
case TP_SIZET:
|
|
(*argtable) [n].psizearg = va_arg (ap, ssize_t *);
|
|
break;
|
|
case T_INTMAXT:
|
|
(*argtable) [n].intmaxarg = va_arg (ap, intmax_t);
|
|
break;
|
|
case T_UINTMAXT:
|
|
(*argtable) [n].uintmaxarg = va_arg (ap, uintmax_t);
|
|
break;
|
|
case TP_INTMAXT:
|
|
(*argtable) [n].pintmaxarg = va_arg (ap, intmax_t *);
|
|
break;
|
|
#ifdef FLOATING_POINT
|
|
case T_DOUBLE:
|
|
(*argtable) [n].doublearg = va_arg (ap, double);
|
|
break;
|
|
case T_LONG_DOUBLE:
|
|
(*argtable) [n].longdoublearg = va_arg (ap, long double);
|
|
break;
|
|
#endif
|
|
case TP_CHAR:
|
|
(*argtable) [n].pchararg = va_arg (ap, char *);
|
|
break;
|
|
case TP_VOID:
|
|
(*argtable) [n].pvoidarg = va_arg (ap, void *);
|
|
break;
|
|
}
|
|
}
|
|
|
|
if ((typetable != NULL) && (typetable != stattypetable))
|
|
free (typetable);
|
|
}
|
|
|
|
/*
|
|
* Increase the size of the type table.
|
|
*/
|
|
static void
|
|
__grow_type_table (int nextarg, enum typeid **typetable, int *tablesize)
|
|
{
|
|
enum typeid *const oldtable = *typetable;
|
|
const int oldsize = *tablesize;
|
|
enum typeid *newtable;
|
|
int newsize = oldsize * 2;
|
|
|
|
if (newsize < nextarg + 1)
|
|
newsize = nextarg + 1;
|
|
if (oldsize == STATIC_ARG_TBL_SIZE) {
|
|
if ((newtable = malloc(newsize)) == NULL)
|
|
abort(); /* XXX handle better */
|
|
bcopy(oldtable, newtable, oldsize);
|
|
} else {
|
|
if ((newtable = reallocf(oldtable, newsize)) == NULL)
|
|
abort(); /* XXX handle better */
|
|
}
|
|
memset(&newtable[oldsize], T_UNUSED, newsize - oldsize);
|
|
|
|
*typetable = newtable;
|
|
*tablesize = newsize;
|
|
}
|
|
|
|
|
|
#ifdef FLOATING_POINT
|
|
|
|
extern char *__dtoa __P((double, int, int, int *, int *, char **, char **));
|
|
|
|
static char *
|
|
cvt(double value, int ndigits, int flags, char *sign, int *decpt,
|
|
int ch, int *length, char **dtoaresultp)
|
|
{
|
|
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,
|
|
dtoaresultp);
|
|
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(char *p0, int exp, int fmtch)
|
|
{
|
|
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 */
|