320d6d4d09
Adding %b support to vfprintf for parity with kernel space requires more discussion/review. In particular, many parties were concerned over introducing a non-standard format qualifier to *printf(3) which didn't already exist in other OSes, e.g. Linux, thus making code which used %b harder to port to other operating systems. Requested by: many
1046 lines
26 KiB
C
1046 lines
26 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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* Copyright (c) 2011 The FreeBSD Foundation
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* All rights reserved.
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* Portions of this software were developed by David Chisnall
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* under sponsorship from the FreeBSD Foundation.
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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. 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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static char sccsid[] = "@(#)vfprintf.c 8.1 (Berkeley) 6/4/93";
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#endif /* LIBC_SCCS and not lint */
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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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 <errno.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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#include <wchar.h>
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#include <printf.h>
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#include <stdarg.h>
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#include "xlocale_private.h"
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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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#include "printflocal.h"
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static int __sprint(FILE *, struct __suio *, locale_t);
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static int __sbprintf(FILE *, locale_t, const char *, va_list) __printflike(3, 0)
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__noinline;
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static char *__wcsconv(wchar_t *, int);
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#define CHAR char
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#include "printfcommon.h"
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struct grouping_state {
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char *thousands_sep; /* locale-specific thousands separator */
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int thousep_len; /* length of thousands_sep */
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const char *grouping; /* locale-specific numeric grouping rules */
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int lead; /* sig figs before decimal or group sep */
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int nseps; /* number of group separators with ' */
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int nrepeats; /* number of repeats of the last group */
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};
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/*
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* Initialize the thousands' grouping state in preparation to print a
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* number with ndigits digits. This routine returns the total number
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* of bytes that will be needed.
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*/
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static int
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grouping_init(struct grouping_state *gs, int ndigits, locale_t loc)
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{
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struct lconv *locale;
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locale = localeconv_l(loc);
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gs->grouping = locale->grouping;
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gs->thousands_sep = locale->thousands_sep;
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gs->thousep_len = strlen(gs->thousands_sep);
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gs->nseps = gs->nrepeats = 0;
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gs->lead = ndigits;
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while (*gs->grouping != CHAR_MAX) {
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if (gs->lead <= *gs->grouping)
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break;
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gs->lead -= *gs->grouping;
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if (*(gs->grouping+1)) {
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gs->nseps++;
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gs->grouping++;
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} else
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gs->nrepeats++;
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}
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return ((gs->nseps + gs->nrepeats) * gs->thousep_len);
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}
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/*
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* Print a number with thousands' separators.
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*/
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static int
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grouping_print(struct grouping_state *gs, struct io_state *iop,
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const CHAR *cp, const CHAR *ep, locale_t locale)
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{
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const CHAR *cp0 = cp;
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if (io_printandpad(iop, cp, ep, gs->lead, zeroes, locale))
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return (-1);
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cp += gs->lead;
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while (gs->nseps > 0 || gs->nrepeats > 0) {
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if (gs->nrepeats > 0)
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gs->nrepeats--;
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else {
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gs->grouping--;
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gs->nseps--;
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}
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if (io_print(iop, gs->thousands_sep, gs->thousep_len, locale))
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return (-1);
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if (io_printandpad(iop, cp, ep, *gs->grouping, zeroes, locale))
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return (-1);
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cp += *gs->grouping;
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}
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if (cp > ep)
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cp = ep;
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return (cp - cp0);
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}
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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, locale_t locale)
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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, locale_t locale, const char *fmt, va_list ap)
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{
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int ret;
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FILE fake = FAKE_FILE;
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unsigned char buf[BUFSIZ];
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/* XXX This is probably not needed. */
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if (prepwrite(fp) != 0)
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return (EOF);
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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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fake._orientation = fp->_orientation;
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fake._mbstate = fp->_mbstate;
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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, locale, 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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* Convert a wide character string argument for the %ls format to a multibyte
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* string representation. If not -1, prec specifies the maximum number of
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* bytes to output, and also means that we can't assume that the wide char.
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* string ends is null-terminated.
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*/
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static char *
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__wcsconv(wchar_t *wcsarg, int prec)
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{
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static const mbstate_t initial;
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mbstate_t mbs;
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char buf[MB_LEN_MAX];
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wchar_t *p;
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char *convbuf;
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size_t clen, nbytes;
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/* Allocate space for the maximum number of bytes we could output. */
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if (prec < 0) {
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p = wcsarg;
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mbs = initial;
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nbytes = wcsrtombs(NULL, (const wchar_t **)&p, 0, &mbs);
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if (nbytes == (size_t)-1)
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return (NULL);
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} else {
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/*
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* Optimisation: if the output precision is small enough,
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* just allocate enough memory for the maximum instead of
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* scanning the string.
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*/
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if (prec < 128)
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nbytes = prec;
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else {
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nbytes = 0;
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p = wcsarg;
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mbs = initial;
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for (;;) {
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clen = wcrtomb(buf, *p++, &mbs);
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if (clen == 0 || clen == (size_t)-1 ||
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nbytes + clen > prec)
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break;
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nbytes += clen;
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}
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}
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}
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if ((convbuf = malloc(nbytes + 1)) == NULL)
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return (NULL);
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/* Fill the output buffer. */
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p = wcsarg;
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mbs = initial;
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if ((nbytes = wcsrtombs(convbuf, (const wchar_t **)&p,
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nbytes, &mbs)) == (size_t)-1) {
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free(convbuf);
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return (NULL);
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}
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convbuf[nbytes] = '\0';
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return (convbuf);
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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_l(FILE * __restrict fp, locale_t locale, const char * __restrict fmt0,
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va_list ap)
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{
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int ret;
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FIX_LOCALE(locale);
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FLOCKFILE(fp);
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/* optimise fprintf(stderr) (and other unbuffered Unix files) */
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if ((fp->_flags & (__SNBF|__SWR|__SRW)) == (__SNBF|__SWR) &&
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fp->_file >= 0)
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ret = __sbprintf(fp, locale, fmt0, ap);
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else
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ret = __vfprintf(fp, locale, fmt0, ap);
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FUNLOCKFILE(fp);
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return (ret);
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}
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int
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vfprintf(FILE * __restrict fp, const char * __restrict fmt0, va_list ap)
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{
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return vfprintf_l(fp, __get_locale(), fmt0, ap);
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}
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/*
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* The size of the buffer we use as scratch space for integer
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* conversions, among other things. We need enough space to
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* write a uintmax_t in octal (plus one byte).
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*/
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#if UINTMAX_MAX <= UINT64_MAX
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#define BUF 32
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#else
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#error "BUF must be large enough to format a uintmax_t"
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#endif
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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, locale_t locale, 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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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; <0 for N/A */
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char sign; /* sign prefix (' ', '+', '-', or \0) */
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struct grouping_state gs; /* thousands' grouping info */
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#ifndef NO_FLOATING_POINT
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/*
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* We can decompose the printed representation of floating
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* point numbers into several parts, some of which may be empty:
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*
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* [+|-| ] [0x|0X] MMM . NNN [e|E|p|P] [+|-] ZZ
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* A B ---C--- D E F
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*
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* A: 'sign' holds this value if present; '\0' otherwise
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* B: ox[1] holds the 'x' or 'X'; '\0' if not hexadecimal
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* C: cp points to the string MMMNNN. Leading and trailing
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* zeros are not in the string and must be added.
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* D: expchar holds this character; '\0' if no exponent, e.g. %f
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* F: at least two digits for decimal, at least one digit for hex
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*/
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char *decimal_point; /* locale specific decimal point */
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int decpt_len; /* length of decimal_point */
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int signflag; /* true if float is negative */
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union { /* floating point arguments %[aAeEfFgG] */
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double dbl;
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long double ldbl;
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} fparg;
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int expt; /* integer value of exponent */
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char expchar; /* exponent character: [eEpP\0] */
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char *dtoaend; /* pointer to end of converted digits */
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int expsize; /* character count for expstr */
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int ndig; /* actual number of digits returned by dtoa */
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char expstr[MAXEXPDIG+2]; /* buffer for exponent string: e+ZZZ */
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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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const char *xdigs; /* digits for %[xX] conversion */
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struct io_state io; /* I/O buffering state */
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char buf[BUF]; /* buffer with space for digits of uintmax_t */
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char ox[2]; /* space for 0x; ox[1] is either x, X, or \0 */
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union arg *argtable; /* args, built due to positional arg */
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union arg statargtable [STATIC_ARG_TBL_SIZE];
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int nextarg; /* 1-based argument index */
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va_list orgap; /* original argument pointer */
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char *convbuf; /* wide to multibyte conversion result */
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int savserr;
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static const char xdigs_lower[16] = "0123456789abcdef";
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static const char xdigs_upper[16] = "0123456789ABCDEF";
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/* BEWARE, these `goto error' on error. */
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#define PRINT(ptr, len) { \
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if (io_print(&io, (ptr), (len), locale)) \
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goto error; \
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}
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#define PAD(howmany, with) { \
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if (io_pad(&io, (howmany), (with), locale)) \
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goto error; \
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}
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#define PRINTANDPAD(p, ep, len, with) { \
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if (io_printandpad(&io, (p), (ep), (len), (with), locale)) \
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goto error; \
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}
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#define FLUSH() { \
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if (io_flush(&io, locale)) \
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goto error; \
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}
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|
|
/*
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* Get the argument indexed by nextarg. If the argument table is
|
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* built, use it to get the argument. If its not, get the next
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* argument (and arguments must be gotten sequentially).
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*/
|
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#define GETARG(type) \
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((argtable != NULL) ? *((type*)(&argtable[nextarg++])) : \
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(nextarg++, va_arg(ap, type)))
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|
|
/*
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* To extend shorts properly, we need both signed and unsigned
|
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* argument extraction methods.
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|
*/
|
|
#define SARG() \
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(flags&LONGINT ? GETARG(long) : \
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flags&SHORTINT ? (long)(short)GETARG(int) : \
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|
flags&CHARINT ? (long)(signed char)GETARG(int) : \
|
|
(long)GETARG(int))
|
|
#define UARG() \
|
|
(flags&LONGINT ? GETARG(u_long) : \
|
|
flags&SHORTINT ? (u_long)(u_short)GETARG(int) : \
|
|
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(ssize_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; \
|
|
if (__find_arguments (fmt0, orgap, &argtable)) { \
|
|
ret = EOF; \
|
|
goto error; \
|
|
} \
|
|
} \
|
|
nextarg = n2; \
|
|
val = GETARG (int); \
|
|
nextarg = hold; \
|
|
fmt = ++cp; \
|
|
} else { \
|
|
val = GETARG (int); \
|
|
}
|
|
|
|
if (__use_xprintf == 0 && getenv("USE_XPRINTF"))
|
|
__use_xprintf = 1;
|
|
if (__use_xprintf > 0)
|
|
return (__xvprintf(fp, fmt0, ap));
|
|
|
|
/* sorry, fprintf(read_only_file, "") returns EOF, not 0 */
|
|
if (prepwrite(fp) != 0) {
|
|
errno = EBADF;
|
|
return (EOF);
|
|
}
|
|
|
|
savserr = fp->_flags & __SERR;
|
|
fp->_flags &= ~__SERR;
|
|
|
|
convbuf = NULL;
|
|
fmt = (char *)fmt0;
|
|
argtable = NULL;
|
|
nextarg = 1;
|
|
va_copy(orgap, ap);
|
|
io_init(&io, fp);
|
|
ret = 0;
|
|
#ifndef NO_FLOATING_POINT
|
|
dtoaresult = NULL;
|
|
decimal_point = localeconv_l(locale)->decimal_point;
|
|
/* The overwhelmingly common case is decpt_len == 1. */
|
|
decpt_len = (decimal_point[1] == '\0' ? 1 : strlen(decimal_point));
|
|
#endif
|
|
|
|
/*
|
|
* 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;
|
|
errno = EOVERFLOW;
|
|
goto error;
|
|
}
|
|
PRINT(cp, n);
|
|
ret += n;
|
|
}
|
|
if (ch == '\0')
|
|
goto done;
|
|
fmt++; /* skip over '%' */
|
|
|
|
flags = 0;
|
|
dprec = 0;
|
|
width = 0;
|
|
prec = -1;
|
|
gs.grouping = NULL;
|
|
sign = '\0';
|
|
ox[1] = '\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;
|
|
goto rflag;
|
|
case '.':
|
|
if ((ch = *fmt++) == '*') {
|
|
GETASTER (prec);
|
|
goto rflag;
|
|
}
|
|
prec = 0;
|
|
while (is_digit(ch)) {
|
|
prec = 10 * prec + to_digit(ch);
|
|
ch = *fmt++;
|
|
}
|
|
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;
|
|
if (__find_arguments (fmt0, orgap,
|
|
&argtable)) {
|
|
ret = EOF;
|
|
goto error;
|
|
}
|
|
}
|
|
goto rflag;
|
|
}
|
|
width = n;
|
|
goto reswitch;
|
|
#ifndef NO_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':
|
|
flags |= LONGINT;
|
|
/*FALLTHROUGH*/
|
|
case 'c':
|
|
if (flags & LONGINT) {
|
|
static const mbstate_t initial;
|
|
mbstate_t mbs;
|
|
size_t mbseqlen;
|
|
|
|
mbs = initial;
|
|
mbseqlen = wcrtomb(cp = buf,
|
|
(wchar_t)GETARG(wint_t), &mbs);
|
|
if (mbseqlen == (size_t)-1) {
|
|
fp->_flags |= __SERR;
|
|
goto error;
|
|
}
|
|
size = (int)mbseqlen;
|
|
} else {
|
|
*(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;
|
|
#ifndef NO_FLOATING_POINT
|
|
case 'a':
|
|
case 'A':
|
|
if (ch == 'a') {
|
|
ox[1] = 'x';
|
|
xdigs = xdigs_lower;
|
|
expchar = 'p';
|
|
} else {
|
|
ox[1] = 'X';
|
|
xdigs = xdigs_upper;
|
|
expchar = 'P';
|
|
}
|
|
if (prec >= 0)
|
|
prec++;
|
|
if (dtoaresult != NULL)
|
|
freedtoa(dtoaresult);
|
|
if (flags & LONGDBL) {
|
|
fparg.ldbl = GETARG(long double);
|
|
dtoaresult = cp =
|
|
__hldtoa(fparg.ldbl, xdigs, prec,
|
|
&expt, &signflag, &dtoaend);
|
|
} else {
|
|
fparg.dbl = GETARG(double);
|
|
dtoaresult = cp =
|
|
__hdtoa(fparg.dbl, xdigs, prec,
|
|
&expt, &signflag, &dtoaend);
|
|
}
|
|
if (prec < 0)
|
|
prec = dtoaend - cp;
|
|
if (expt == INT_MAX)
|
|
ox[1] = '\0';
|
|
goto fp_common;
|
|
case 'e':
|
|
case 'E':
|
|
expchar = ch;
|
|
if (prec < 0) /* account for digit before decpt */
|
|
prec = DEFPREC + 1;
|
|
else
|
|
prec++;
|
|
goto fp_begin;
|
|
case 'f':
|
|
case 'F':
|
|
expchar = '\0';
|
|
goto fp_begin;
|
|
case 'g':
|
|
case 'G':
|
|
expchar = ch - ('g' - 'e');
|
|
if (prec == 0)
|
|
prec = 1;
|
|
fp_begin:
|
|
if (prec < 0)
|
|
prec = DEFPREC;
|
|
if (dtoaresult != NULL)
|
|
freedtoa(dtoaresult);
|
|
if (flags & LONGDBL) {
|
|
fparg.ldbl = GETARG(long double);
|
|
dtoaresult = cp =
|
|
__ldtoa(&fparg.ldbl, expchar ? 2 : 3, prec,
|
|
&expt, &signflag, &dtoaend);
|
|
} else {
|
|
fparg.dbl = GETARG(double);
|
|
dtoaresult = cp =
|
|
dtoa(fparg.dbl, expchar ? 2 : 3, prec,
|
|
&expt, &signflag, &dtoaend);
|
|
if (expt == 9999)
|
|
expt = INT_MAX;
|
|
}
|
|
fp_common:
|
|
if (signflag)
|
|
sign = '-';
|
|
if (expt == INT_MAX) { /* inf or nan */
|
|
if (*cp == 'N') {
|
|
cp = (ch >= 'a') ? "nan" : "NAN";
|
|
sign = '\0';
|
|
} else
|
|
cp = (ch >= 'a') ? "inf" : "INF";
|
|
size = 3;
|
|
flags &= ~ZEROPAD;
|
|
break;
|
|
}
|
|
flags |= FPT;
|
|
ndig = dtoaend - cp;
|
|
if (ch == 'g' || ch == 'G') {
|
|
if (expt > -4 && expt <= prec) {
|
|
/* Make %[gG] smell like %[fF] */
|
|
expchar = '\0';
|
|
if (flags & ALT)
|
|
prec -= expt;
|
|
else
|
|
prec = ndig - expt;
|
|
if (prec < 0)
|
|
prec = 0;
|
|
} else {
|
|
/*
|
|
* Make %[gG] smell like %[eE], but
|
|
* trim trailing zeroes if no # flag.
|
|
*/
|
|
if (!(flags & ALT))
|
|
prec = ndig;
|
|
}
|
|
}
|
|
if (expchar) {
|
|
expsize = exponent(expstr, expt - 1, expchar);
|
|
size = expsize + prec;
|
|
if (prec > 1 || flags & ALT)
|
|
size += decpt_len;
|
|
} else {
|
|
/* space for digits before decimal point */
|
|
if (expt > 0)
|
|
size = expt;
|
|
else /* "0" */
|
|
size = 1;
|
|
/* space for decimal pt and following digits */
|
|
if (prec || flags & ALT)
|
|
size += prec + decpt_len;
|
|
if ((flags & GROUPING) && expt > 0)
|
|
size += grouping_init(&gs, expt, locale);
|
|
}
|
|
break;
|
|
#endif /* !NO_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 = xdigs_lower;
|
|
flags = flags | INTMAXT;
|
|
ox[1] = 'x';
|
|
goto nosign;
|
|
case 'S':
|
|
flags |= LONGINT;
|
|
/*FALLTHROUGH*/
|
|
case 's':
|
|
if (flags & LONGINT) {
|
|
wchar_t *wcp;
|
|
|
|
if (convbuf != NULL)
|
|
free(convbuf);
|
|
if ((wcp = GETARG(wchar_t *)) == NULL)
|
|
cp = "(null)";
|
|
else {
|
|
convbuf = __wcsconv(wcp, prec);
|
|
if (convbuf == NULL) {
|
|
fp->_flags |= __SERR;
|
|
goto error;
|
|
}
|
|
cp = convbuf;
|
|
}
|
|
} else if ((cp = GETARG(char *)) == NULL)
|
|
cp = "(null)";
|
|
size = (prec >= 0) ? strnlen(cp, prec) : 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 = xdigs_upper;
|
|
goto hex;
|
|
case 'x':
|
|
xdigs = xdigs_lower;
|
|
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))
|
|
ox[1] = ch;
|
|
|
|
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
|
|
*
|
|
* ``The C Standard is clear enough as is. The call
|
|
* printf("%#.0o", 0) should print 0.''
|
|
* -- Defect Report #151
|
|
*/
|
|
cp = buf + BUF;
|
|
if (flags & INTMAX_SIZE) {
|
|
if (ujval != 0 || prec != 0 ||
|
|
(flags & ALT && base == 8))
|
|
cp = __ujtoa(ujval, cp, base,
|
|
flags & ALT, xdigs);
|
|
} else {
|
|
if (ulval != 0 || prec != 0 ||
|
|
(flags & ALT && base == 8))
|
|
cp = __ultoa(ulval, cp, base,
|
|
flags & ALT, xdigs);
|
|
}
|
|
size = buf + BUF - cp;
|
|
if (size > BUF) /* should never happen */
|
|
abort();
|
|
if ((flags & GROUPING) && size != 0)
|
|
size += grouping_init(&gs, size, locale);
|
|
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++;
|
|
if (ox[1])
|
|
realsz += 2;
|
|
|
|
prsize = width > realsz ? width : realsz;
|
|
if ((unsigned)ret + prsize > INT_MAX) {
|
|
ret = EOF;
|
|
errno = EOVERFLOW;
|
|
goto error;
|
|
}
|
|
|
|
/* right-adjusting blank padding */
|
|
if ((flags & (LADJUST|ZEROPAD)) == 0)
|
|
PAD(width - realsz, blanks);
|
|
|
|
/* prefix */
|
|
if (sign)
|
|
PRINT(&sign, 1);
|
|
|
|
if (ox[1]) { /* ox[1] is either x, X, or \0 */
|
|
ox[0] = '0';
|
|
PRINT(ox, 2);
|
|
}
|
|
|
|
/* right-adjusting zero padding */
|
|
if ((flags & (LADJUST|ZEROPAD)) == ZEROPAD)
|
|
PAD(width - realsz, zeroes);
|
|
|
|
/* the string or number proper */
|
|
#ifndef NO_FLOATING_POINT
|
|
if ((flags & FPT) == 0) {
|
|
#endif
|
|
/* leading zeroes from decimal precision */
|
|
PAD(dprec - size, zeroes);
|
|
if (gs.grouping) {
|
|
if (grouping_print(&gs, &io, cp, buf+BUF, locale) < 0)
|
|
goto error;
|
|
} else {
|
|
PRINT(cp, size);
|
|
}
|
|
#ifndef NO_FLOATING_POINT
|
|
} else { /* glue together f_p fragments */
|
|
if (!expchar) { /* %[fF] or sufficiently short %[gG] */
|
|
if (expt <= 0) {
|
|
PRINT(zeroes, 1);
|
|
if (prec || flags & ALT)
|
|
PRINT(decimal_point,decpt_len);
|
|
PAD(-expt, zeroes);
|
|
/* already handled initial 0's */
|
|
prec += expt;
|
|
} else {
|
|
if (gs.grouping) {
|
|
n = grouping_print(&gs, &io,
|
|
cp, dtoaend, locale);
|
|
if (n < 0)
|
|
goto error;
|
|
cp += n;
|
|
} else {
|
|
PRINTANDPAD(cp, dtoaend,
|
|
expt, zeroes);
|
|
cp += expt;
|
|
}
|
|
if (prec || flags & ALT)
|
|
PRINT(decimal_point,decpt_len);
|
|
}
|
|
PRINTANDPAD(cp, dtoaend, prec, zeroes);
|
|
} else { /* %[eE] or sufficiently long %[gG] */
|
|
if (prec > 1 || flags & ALT) {
|
|
PRINT(cp++, 1);
|
|
PRINT(decimal_point, decpt_len);
|
|
PRINT(cp, ndig-1);
|
|
PAD(prec - ndig, zeroes);
|
|
} else /* XeYYY */
|
|
PRINT(cp, 1);
|
|
PRINT(expstr, expsize);
|
|
}
|
|
}
|
|
#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:
|
|
va_end(orgap);
|
|
#ifndef NO_FLOATING_POINT
|
|
if (dtoaresult != NULL)
|
|
freedtoa(dtoaresult);
|
|
#endif
|
|
if (convbuf != NULL)
|
|
free(convbuf);
|
|
if (__sferror(fp))
|
|
ret = EOF;
|
|
else
|
|
fp->_flags |= savserr;
|
|
if ((argtable != NULL) && (argtable != statargtable))
|
|
free (argtable);
|
|
return (ret);
|
|
/* NOTREACHED */
|
|
}
|
|
|