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| Current File : //usr/src/lib/libc/stdio/vfwprintf.c |
/*-
* Copyright (c) 1990, 1993
* The Regents of the University of California. All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* Chris Torek.
*
* Copyright (c) 2011 The FreeBSD Foundation
* All rights reserved.
* Portions of this software were developed by David Chisnall
* under sponsorship from the FreeBSD Foundation.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#if 0
#if defined(LIBC_SCCS) && !defined(lint)
static char sccsid[] = "@(#)vfprintf.c 8.1 (Berkeley) 6/4/93";
#endif /* LIBC_SCCS and not lint */
#endif
#include <sys/cdefs.h>
__FBSDID("$FreeBSD: release/9.1.0/lib/libc/stdio/vfwprintf.c 235785 2012-05-22 14:40:39Z theraven $");
/*
* Actual wprintf innards.
*
* Avoid making gratuitous changes to this source file; it should be kept
* as close as possible to vfprintf.c for ease of maintenance.
*/
#include "namespace.h"
#include <sys/types.h>
#include <ctype.h>
#include <limits.h>
#include <locale.h>
#include <stdarg.h>
#include <stddef.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <wchar.h>
#include <wctype.h>
#include "un-namespace.h"
#include "libc_private.h"
#include "local.h"
#include "fvwrite.h"
#include "printflocal.h"
#include "xlocale_private.h"
static int __sprint(FILE *, struct __suio *, locale_t);
static int __sbprintf(FILE *, locale_t, const wchar_t *, va_list) __noinline;
static wint_t __xfputwc(wchar_t, FILE *, locale_t);
static wchar_t *__mbsconv(char *, int);
#define CHAR wchar_t
#include "printfcommon.h"
struct grouping_state {
wchar_t thousands_sep; /* locale-specific thousands separator */
const char *grouping; /* locale-specific numeric grouping rules */
int lead; /* sig figs before decimal or group sep */
int nseps; /* number of group separators with ' */
int nrepeats; /* number of repeats of the last group */
};
static const mbstate_t initial_mbs;
static inline wchar_t
get_decpt(locale_t locale)
{
mbstate_t mbs;
wchar_t decpt;
int nconv;
mbs = initial_mbs;
nconv = mbrtowc(&decpt, localeconv_l(locale)->decimal_point, MB_CUR_MAX, &mbs);
if (nconv == (size_t)-1 || nconv == (size_t)-2)
decpt = '.'; /* failsafe */
return (decpt);
}
static inline wchar_t
get_thousep(locale_t locale)
{
mbstate_t mbs;
wchar_t thousep;
int nconv;
mbs = initial_mbs;
nconv = mbrtowc(&thousep, localeconv_l(locale)->thousands_sep,
MB_CUR_MAX, &mbs);
if (nconv == (size_t)-1 || nconv == (size_t)-2)
thousep = '\0'; /* failsafe */
return (thousep);
}
/*
* Initialize the thousands' grouping state in preparation to print a
* number with ndigits digits. This routine returns the total number
* of wide characters that will be printed.
*/
static int
grouping_init(struct grouping_state *gs, int ndigits, locale_t locale)
{
gs->grouping = localeconv_l(locale)->grouping;
gs->thousands_sep = get_thousep(locale);
gs->nseps = gs->nrepeats = 0;
gs->lead = ndigits;
while (*gs->grouping != CHAR_MAX) {
if (gs->lead <= *gs->grouping)
break;
gs->lead -= *gs->grouping;
if (*(gs->grouping+1)) {
gs->nseps++;
gs->grouping++;
} else
gs->nrepeats++;
}
return (gs->nseps + gs->nrepeats);
}
/*
* Print a number with thousands' separators.
*/
static int
grouping_print(struct grouping_state *gs, struct io_state *iop,
const CHAR *cp, const CHAR *ep, locale_t locale)
{
const CHAR *cp0 = cp;
if (io_printandpad(iop, cp, ep, gs->lead, zeroes, locale))
return (-1);
cp += gs->lead;
while (gs->nseps > 0 || gs->nrepeats > 0) {
if (gs->nrepeats > 0)
gs->nrepeats--;
else {
gs->grouping--;
gs->nseps--;
}
if (io_print(iop, &gs->thousands_sep, 1, locale))
return (-1);
if (io_printandpad(iop, cp, ep, *gs->grouping, zeroes, locale))
return (-1);
cp += *gs->grouping;
}
if (cp > ep)
cp = ep;
return (cp - cp0);
}
/*
* Flush out all the vectors defined by the given uio,
* then reset it so that it can be reused.
*
* XXX The fact that we do this a character at a time and convert to a
* multibyte character sequence even if the destination is a wide
* string eclipses the benefits of buffering.
*/
static int
__sprint(FILE *fp, struct __suio *uio, locale_t locale)
{
struct __siov *iov;
wchar_t *p;
int i, len;
iov = uio->uio_iov;
for (; uio->uio_resid != 0; uio->uio_resid -= len, iov++) {
p = (wchar_t *)iov->iov_base;
len = iov->iov_len;
for (i = 0; i < len; i++) {
if (__xfputwc(p[i], fp, locale) == WEOF)
return (-1);
}
}
uio->uio_iovcnt = 0;
return (0);
}
/*
* Helper function for `fprintf to unbuffered unix file': creates a
* temporary buffer. We only work on write-only files; this avoids
* worries about ungetc buffers and so forth.
*/
static int
__sbprintf(FILE *fp, locale_t locale, const wchar_t *fmt, va_list ap)
{
int ret;
FILE fake;
unsigned char buf[BUFSIZ];
/* XXX This is probably not needed. */
if (prepwrite(fp) != 0)
return (EOF);
/* copy the important variables */
fake._flags = fp->_flags & ~__SNBF;
fake._file = fp->_file;
fake._cookie = fp->_cookie;
fake._write = fp->_write;
fake._orientation = fp->_orientation;
fake._mbstate = fp->_mbstate;
/* set up the buffer */
fake._bf._base = fake._p = buf;
fake._bf._size = fake._w = sizeof(buf);
fake._lbfsize = 0; /* not actually used, but Just In Case */
/* do the work, then copy any error status */
ret = __vfwprintf(&fake, locale, fmt, ap);
if (ret >= 0 && __fflush(&fake))
ret = WEOF;
if (fake._flags & __SERR)
fp->_flags |= __SERR;
return (ret);
}
/*
* Like __fputwc, but handles fake string (__SSTR) files properly.
* File must already be locked.
*/
static wint_t
__xfputwc(wchar_t wc, FILE *fp, locale_t locale)
{
mbstate_t mbs;
char buf[MB_LEN_MAX];
struct __suio uio;
struct __siov iov;
size_t len;
if ((fp->_flags & __SSTR) == 0)
return (__fputwc(wc, fp, locale));
mbs = initial_mbs;
if ((len = wcrtomb(buf, wc, &mbs)) == (size_t)-1) {
fp->_flags |= __SERR;
return (WEOF);
}
uio.uio_iov = &iov;
uio.uio_resid = len;
uio.uio_iovcnt = 1;
iov.iov_base = buf;
iov.iov_len = len;
return (__sfvwrite(fp, &uio) != EOF ? (wint_t)wc : WEOF);
}
/*
* Convert a multibyte character string argument for the %s format to a wide
* string representation. ``prec'' specifies the maximum number of bytes
* to output. If ``prec'' is greater than or equal to zero, we can't assume
* that the multibyte char. string ends in a null character.
*/
static wchar_t *
__mbsconv(char *mbsarg, int prec)
{
mbstate_t mbs;
wchar_t *convbuf, *wcp;
const char *p;
size_t insize, nchars, nconv;
if (mbsarg == NULL)
return (NULL);
/*
* Supplied argument is a multibyte string; convert it to wide
* characters first.
*/
if (prec >= 0) {
/*
* String is not guaranteed to be NUL-terminated. Find the
* number of characters to print.
*/
p = mbsarg;
insize = nchars = nconv = 0;
mbs = initial_mbs;
while (nchars != (size_t)prec) {
nconv = mbrlen(p, MB_CUR_MAX, &mbs);
if (nconv == 0 || nconv == (size_t)-1 ||
nconv == (size_t)-2)
break;
p += nconv;
nchars++;
insize += nconv;
}
if (nconv == (size_t)-1 || nconv == (size_t)-2)
return (NULL);
} else {
insize = strlen(mbsarg);
nconv = 0;
}
/*
* Allocate buffer for the result and perform the conversion,
* converting at most `size' bytes of the input multibyte string to
* wide characters for printing.
*/
convbuf = malloc((insize + 1) * sizeof(*convbuf));
if (convbuf == NULL)
return (NULL);
wcp = convbuf;
p = mbsarg;
mbs = initial_mbs;
while (insize != 0) {
nconv = mbrtowc(wcp, p, insize, &mbs);
if (nconv == 0 || nconv == (size_t)-1 || nconv == (size_t)-2)
break;
wcp++;
p += nconv;
insize -= nconv;
}
if (nconv == (size_t)-1 || nconv == (size_t)-2) {
free(convbuf);
return (NULL);
}
*wcp = L'\0';
return (convbuf);
}
/*
* MT-safe version
*/
int
vfwprintf_l(FILE * __restrict fp, locale_t locale,
const wchar_t * __restrict fmt0, va_list ap)
{
int ret;
FIX_LOCALE(locale);
FLOCKFILE(fp);
/* optimise fprintf(stderr) (and other unbuffered Unix files) */
if ((fp->_flags & (__SNBF|__SWR|__SRW)) == (__SNBF|__SWR) &&
fp->_file >= 0)
ret = __sbprintf(fp, locale, fmt0, ap);
else
ret = __vfwprintf(fp, locale, fmt0, ap);
FUNLOCKFILE(fp);
return (ret);
}
int
vfwprintf(FILE * __restrict fp, const wchar_t * __restrict fmt0, va_list ap)
{
return vfwprintf_l(fp, __get_locale(), fmt0, ap);
}
/*
* The size of the buffer we use as scratch space for integer
* conversions, among other things. We need enough space to
* write a uintmax_t in octal (plus one byte).
*/
#if UINTMAX_MAX <= UINT64_MAX
#define BUF 32
#else
#error "BUF must be large enough to format a uintmax_t"
#endif
/*
* Non-MT-safe version
*/
int
__vfwprintf(FILE *fp, locale_t locale, const wchar_t *fmt0, va_list ap)
{
wchar_t *fmt; /* format string */
wchar_t ch; /* character from fmt */
int n, n2; /* handy integer (short term usage) */
wchar_t *cp; /* handy char pointer (short term usage) */
int flags; /* flags as above */
int ret; /* return value accumulator */
int width; /* width from format (%8d), or 0 */
int prec; /* precision from format; <0 for N/A */
wchar_t sign; /* sign prefix (' ', '+', '-', or \0) */
struct grouping_state gs; /* thousands' grouping info */
#ifndef NO_FLOATING_POINT
/*
* We can decompose the printed representation of floating
* point numbers into several parts, some of which may be empty:
*
* [+|-| ] [0x|0X] MMM . NNN [e|E|p|P] [+|-] ZZ
* A B ---C--- D E F
*
* A: 'sign' holds this value if present; '\0' otherwise
* B: ox[1] holds the 'x' or 'X'; '\0' if not hexadecimal
* C: cp points to the string MMMNNN. Leading and trailing
* zeros are not in the string and must be added.
* D: expchar holds this character; '\0' if no exponent, e.g. %f
* F: at least two digits for decimal, at least one digit for hex
*/
wchar_t decimal_point; /* locale specific decimal point */
int signflag; /* true if float is negative */
union { /* floating point arguments %[aAeEfFgG] */
double dbl;
long double ldbl;
} fparg;
int expt; /* integer value of exponent */
char expchar; /* exponent character: [eEpP\0] */
char *dtoaend; /* pointer to end of converted digits */
int expsize; /* character count for expstr */
int ndig; /* actual number of digits returned by dtoa */
wchar_t expstr[MAXEXPDIG+2]; /* buffer for exponent string: e+ZZZ */
char *dtoaresult; /* buffer allocated by dtoa */
#endif
u_long ulval; /* integer arguments %[diouxX] */
uintmax_t ujval; /* %j, %ll, %q, %t, %z integers */
int base; /* base for [diouxX] conversion */
int dprec; /* a copy of prec if [diouxX], 0 otherwise */
int realsz; /* field size expanded by dprec, sign, etc */
int size; /* size of converted field or string */
int prsize; /* max size of printed field */
const char *xdigs; /* digits for [xX] conversion */
struct io_state io; /* I/O buffering state */
wchar_t buf[BUF]; /* buffer with space for digits of uintmax_t */
wchar_t 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 */
va_list orgap; /* original argument pointer */
wchar_t *convbuf; /* multibyte to wide conversion result */
static const char xdigs_lower[16] = "0123456789abcdef";
static const char xdigs_upper[16] = "0123456789ABCDEF";
/* BEWARE, these `goto error' on error. */
#define PRINT(ptr, len) do { \
if (io_print(&io, (ptr), (len), locale)) \
goto error; \
} while (0)
#define PAD(howmany, with) { \
if (io_pad(&io, (howmany), (with), locale)) \
goto error; \
}
#define PRINTANDPAD(p, ep, len, with) { \
if (io_printandpad(&io, (p), (ep), (len), (with), locale)) \
goto error; \
}
#define FLUSH() { \
if (io_flush(&io, locale)) \
goto error; \
}
/*
* 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) \
((argtable != NULL) ? *((type*)(&argtable[nextarg++])) : \
(nextarg++, va_arg(ap, type)))
/*
* To extend shorts properly, we need both signed and unsigned
* argument extraction methods.
*/
#define SARG() \
(flags&LONGINT ? GETARG(long) : \
flags&SHORTINT ? (long)(short)GETARG(int) : \
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) : \
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_warguments (fmt0, orgap, &argtable)) { \
ret = EOF; \
goto error; \
} \
} \
nextarg = n2; \
val = GETARG (int); \
nextarg = hold; \
fmt = ++cp; \
} else { \
val = GETARG (int); \
}
/* sorry, fwprintf(read_only_file, L"") returns WEOF, not 0 */
if (prepwrite(fp) != 0)
return (EOF);
convbuf = NULL;
fmt = (wchar_t *)fmt0;
argtable = NULL;
nextarg = 1;
va_copy(orgap, ap);
io_init(&io, fp);
ret = 0;
#ifndef NO_FLOATING_POINT
decimal_point = get_decpt(locale);
#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;
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_warguments (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)
*(cp = buf) = (wchar_t)GETARG(wint_t);
else
*(cp = buf) = (wchar_t)btowc(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 (flags & LONGDBL) {
fparg.ldbl = GETARG(long double);
dtoaresult =
__hldtoa(fparg.ldbl, xdigs, prec,
&expt, &signflag, &dtoaend);
} else {
fparg.dbl = GETARG(double);
dtoaresult =
__hdtoa(fparg.dbl, xdigs, prec,
&expt, &signflag, &dtoaend);
}
if (prec < 0)
prec = dtoaend - dtoaresult;
if (expt == INT_MAX)
ox[1] = '\0';
if (convbuf != NULL)
free(convbuf);
ndig = dtoaend - dtoaresult;
cp = convbuf = __mbsconv(dtoaresult, -1);
freedtoa(dtoaresult);
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 (convbuf != NULL)
free(convbuf);
if (flags & LONGDBL) {
fparg.ldbl = GETARG(long double);
dtoaresult =
__ldtoa(&fparg.ldbl, expchar ? 2 : 3, prec,
&expt, &signflag, &dtoaend);
} else {
fparg.dbl = GETARG(double);
dtoaresult =
dtoa(fparg.dbl, expchar ? 2 : 3, prec,
&expt, &signflag, &dtoaend);
if (expt == 9999)
expt = INT_MAX;
}
ndig = dtoaend - dtoaresult;
cp = convbuf = __mbsconv(dtoaresult, -1);
freedtoa(dtoaresult);
fp_common:
if (signflag)
sign = '-';
if (expt == INT_MAX) { /* inf or nan */
if (*cp == 'N') {
cp = (ch >= 'a') ? L"nan" : L"NAN";
sign = '\0';
} else
cp = (ch >= 'a') ? L"inf" : L"INF";
size = 3;
flags &= ~ZEROPAD;
break;
}
flags |= FPT;
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;
} 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 + 1;
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) {
if ((cp = GETARG(wchar_t *)) == NULL)
cp = L"(null)";
} else {
char *mbp;
if (convbuf != NULL)
free(convbuf);
if ((mbp = GETARG(char *)) == NULL)
cp = L"(null)";
else {
convbuf = __mbsconv(mbp, prec);
if (convbuf == NULL) {
fp->_flags |= __SERR;
goto error;
}
cp = convbuf;
}
}
size = (prec >= 0) ? wcsnlen(cp, prec) : wcslen(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;
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, 1);
PAD(-expt, zeroes);
/* already handled initial 0's */
prec += expt;
} else {
if (gs.grouping) {
n = grouping_print(&gs, &io,
cp, convbuf + ndig, locale);
if (n < 0)
goto error;
cp += n;
} else {
PRINTANDPAD(cp, convbuf + ndig,
expt, zeroes);
cp += expt;
}
if (prec || flags & ALT)
PRINT(&decimal_point, 1);
}
PRINTANDPAD(cp, convbuf + ndig, prec, zeroes);
} else { /* %[eE] or sufficiently long %[gG] */
if (prec > 1 || flags & ALT) {
buf[0] = *cp++;
buf[1] = decimal_point;
PRINT(buf, 2);
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);
if (convbuf != NULL)
free(convbuf);
if (__sferror(fp))
ret = EOF;
if ((argtable != NULL) && (argtable != statargtable))
free (argtable);
return (ret);
/* NOTREACHED */
}