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newlib/newlib/libc/stdio/vfwprintf.c
Jeff Johnston 7890be6e7d 2011-07-15 Yufeng Zhang <yufeng.zhang@arm.com> 
* libc/stdio/vfwprintf.c (wcvt): Add a new parameter len of type
        int.  *length is set to the value of (rev - digits) regardless
        of whether _MB_CAPABLE is defined or not.  Replace BUF with len
        in calling _mbsnrtowcs_r and also in the loop where _MB_CAPABLE
        is not defined.
        (_VFWPRINTF_R): Call wcvt with an extra argument.  Call wcvt
        again with allocated new buffer if buf is not large enough for
        the conversion.
        * testsuite/newlib.stdio/stdio.exp: New.
        * testsuite/newlib.stdio/swprintf.c: Likewise.
2011-07-15 17:20:16 +00:00

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/*
* Copyright (c) 1990 The Regents of the University of California.
* All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* Chris Torek.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 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.
*/
/*
FUNCTION
<<vfwprintf>>, <<vwprintf>>, <<vswprintf>>---wide character format argument list
INDEX
vfwprintf
INDEX
_vfwprintf_r
INDEX
vwprintf
INDEX
_vwprintf_r
INDEX
vswprintf
INDEX
_vswprintf_r
ANSI_SYNOPSIS
#include <stdio.h>
#include <stdarg.h>
#include <wchar.h>
int vwprintf(const wchar_t *<[fmt]>, va_list <[list]>);
int vfwprintf(FILE *<[fp]>, const wchar_t *<[fmt]>, va_list <[list]>);
int vswprintf(wchar_t *<[str]>, size_t <[size]>, const wchar_t *<[fmt]>,
va_list <[list]>);
int _vwprintf_r(struct _reent *<[reent]>, const wchar_t *<[fmt]>,
va_list <[list]>);
int _vfwprintf_r(struct _reent *<[reent]>, FILE *<[fp]>,
const wchar_t *<[fmt]>, va_list <[list]>);
int _vswprintf_r(struct _reent *<[reent]>, wchar_t *<[str]>,
size_t <[size]>, const wchar_t *<[fmt]>, va_list <[list]>);
DESCRIPTION
<<vwprintf>>, <<vfwprintf>> and <<vswprintf>> are (respectively) variants
of <<wprintf>>, <<fwprintf>> and <<swprintf>>. They differ only in allowing
their caller to pass the variable argument list as a <<va_list>> object
(initialized by <<va_start>>) rather than directly accepting a variable
number of arguments. The caller is responsible for calling <<va_end>>.
<<_vwprintf_r>>, <<_vfwprintf_r>> and <<_vswprintf_r>> are reentrant
versions of the above.
RETURNS
The return values are consistent with the corresponding functions.
PORTABILITY
POSIX-1.2008 with extensions; C99 (compliant except for POSIX extensions).
Supporting OS subroutines required: <<close>>, <<fstat>>, <<isatty>>,
<<lseek>>, <<read>>, <<sbrk>>, <<write>>.
SEEALSO
<<wprintf>>, <<fwprintf>> and <<swprintf>>.
*/
/*
* Actual wprintf innards.
*
* This code is large and complicated...
*/
#include <newlib.h>
#ifdef INTEGER_ONLY
# define VFWPRINTF vfiwprintf
# ifdef STRING_ONLY
# define _VFWPRINTF_R _svfiwprintf_r
# else
# define _VFWPRINTF_R _vfiwprintf_r
# endif
#else
# define VFWPRINTF vfwprintf
# ifdef STRING_ONLY
# define _VFWPRINTF_R _svfwprintf_r
# else
# define _VFWPRINTF_R _vfwprintf_r
# endif
# ifndef NO_FLOATING_POINT
# define FLOATING_POINT
# endif
#endif
#define _NO_POS_ARGS
#ifdef _WANT_IO_POS_ARGS
# undef _NO_POS_ARGS
#endif
#include <_ansi.h>
#include <reent.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <limits.h>
#include <stdint.h>
#include <wchar.h>
#include <sys/lock.h>
#include <stdarg.h>
#include "local.h"
#include "fvwrite.h"
#include "vfieeefp.h"
#ifdef __HAVE_LOCALE_INFO_EXTENDED__
#include "../locale/lnumeric.h"
#endif
/* Currently a test is made to see if long double processing is warranted.
This could be changed in the future should the _ldtoa_r code be
preferred over _dtoa_r. */
#define _NO_LONGDBL
#if defined _WANT_IO_LONG_DOUBLE && (LDBL_MANT_DIG > DBL_MANT_DIG)
#undef _NO_LONGDBL
#endif
#define _NO_LONGLONG
#if defined _WANT_IO_LONG_LONG \
&& (defined __GNUC__ || __STDC_VERSION__ >= 199901L)
# undef _NO_LONGLONG
#endif
int _EXFUN(_VFWPRINTF_R, (struct _reent *, FILE *, _CONST wchar_t *, va_list));
/* Defined in vfprintf.c. */
#ifdef STRING_ONLY
#define __SPRINT __ssprint_r
#else
#define __SPRINT __sprint_r
#endif
int _EXFUN(__SPRINT, (struct _reent *, FILE *, register struct __suio *));
#ifndef STRING_ONLY
/*
* 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
_DEFUN(__sbwprintf, (rptr, fp, fmt, ap),
struct _reent *rptr _AND
register FILE *fp _AND
_CONST wchar_t *fmt _AND
va_list ap)
{
int ret;
FILE fake;
unsigned char buf[BUFSIZ];
/* copy the important variables */
fake._flags = fp->_flags & ~__SNBF;
fake._flags2 = fp->_flags2;
fake._file = fp->_file;
fake._cookie = fp->_cookie;
fake._write = fp->_write;
/* set up the buffer */
fake._bf._base = fake._p = buf;
fake._bf._size = fake._w = sizeof (buf);
fake._lbfsize = 0; /* not actually used, but Just In Case */
#ifndef __SINGLE_THREAD__
__lock_init_recursive (fake._lock);
#endif
/* do the work, then copy any error status */
ret = _VFWPRINTF_R (rptr, &fake, fmt, ap);
if (ret >= 0 && _fflush_r (rptr, &fake))
ret = EOF;
if (fake._flags & __SERR)
fp->_flags |= __SERR;
#ifndef __SINGLE_THREAD__
__lock_close_recursive (fake._lock);
#endif
return (ret);
}
#endif /* !STRING_ONLY */
#if defined (FLOATING_POINT) || defined (_WANT_IO_C99_FORMATS)
# include <locale.h>
#endif
#ifdef FLOATING_POINT
# include <math.h>
/* For %La, an exponent of 15 bits occupies the exponent character, a
sign, and up to 5 digits. */
# define MAXEXPLEN 7
# define DEFPREC 6
# ifdef _NO_LONGDBL
extern char *_dtoa_r _PARAMS((struct _reent *, double, int,
int, int *, int *, char **));
# define _PRINTF_FLOAT_TYPE double
# define _DTOA_R _dtoa_r
# define FREXP frexp
# else /* !_NO_LONGDBL */
extern char *_ldtoa_r _PARAMS((struct _reent *, _LONG_DOUBLE, int,
int, int *, int *, char **));
extern int _EXFUN(_ldcheck,(_LONG_DOUBLE *));
# define _PRINTF_FLOAT_TYPE _LONG_DOUBLE
# define _DTOA_R _ldtoa_r
/* FIXME - frexpl is not yet supported; and cvt infloops if (double)f
converts a finite value into infinity. */
/* # define FREXP frexpl */
# define FREXP(f,e) ((_LONG_DOUBLE) frexp ((double)f, e))
# endif /* !_NO_LONGDBL */
static wchar_t *wcvt(struct _reent *, _PRINTF_FLOAT_TYPE, int, int, wchar_t *,
int *, int, int *, wchar_t *, int);
static int wexponent(wchar_t *, int, int);
#endif /* FLOATING_POINT */
/* BUF must be big enough for the maximum %#llo (assuming long long is
at most 64 bits, this would be 23 characters), the maximum
multibyte character %C, and the maximum default precision of %La
(assuming long double is at most 128 bits with 113 bits of
mantissa, this would be 29 characters). %e, %f, and %g use
reentrant storage shared with mprec. All other formats that use
buf get by with fewer characters. Making BUF slightly bigger
reduces the need for malloc in %.*a and %ls/%S, when large precision or
long strings are processed.
The bigger size of 100 bytes is used on systems which allow number
strings using the locale's grouping character. Since that's a multibyte
value, we should use a conservative value.
*/
#ifdef _WANT_IO_C99_FORMATS
#define BUF 100
#else
#define BUF 40
#endif
#if defined _MB_CAPABLE && MB_LEN_MAX > BUF
# undef BUF
# define BUF MB_LEN_MAX
#endif
#ifndef _NO_LONGLONG
# define quad_t long long
# define u_quad_t unsigned long long
#else
# define quad_t long
# define u_quad_t unsigned long
#endif
typedef quad_t * quad_ptr_t;
typedef _PTR void_ptr_t;
typedef char * char_ptr_t;
typedef wchar_t* wchar_ptr_t;
typedef long * long_ptr_t;
typedef int * int_ptr_t;
typedef short * short_ptr_t;
#ifndef _NO_POS_ARGS
# ifdef NL_ARGMAX
# define MAX_POS_ARGS NL_ARGMAX
# else
# define MAX_POS_ARGS 32
# endif
union arg_val
{
int val_int;
u_int val_u_int;
long val_long;
u_long val_u_long;
float val_float;
double val_double;
_LONG_DOUBLE val__LONG_DOUBLE;
int_ptr_t val_int_ptr_t;
short_ptr_t val_short_ptr_t;
long_ptr_t val_long_ptr_t;
char_ptr_t val_char_ptr_t;
wchar_ptr_t val_wchar_ptr_t;
quad_ptr_t val_quad_ptr_t;
void_ptr_t val_void_ptr_t;
quad_t val_quad_t;
u_quad_t val_u_quad_t;
wint_t val_wint_t;
};
static union arg_val *
_EXFUN(get_arg, (struct _reent *data, int n, wchar_t *fmt,
va_list *ap, int *numargs, union arg_val *args,
int *arg_type, wchar_t **last_fmt));
#endif /* !_NO_POS_ARGS */
/*
* Macros for converting digits to letters and vice versa
*/
#define to_digit(c) ((c) - L'0')
#define is_digit(c) ((unsigned)to_digit (c) <= 9)
#define to_char(n) ((n) + L'0')
/*
* Flags used during conversion.
*/
#define ALT 0x001 /* alternate form */
#define HEXPREFIX 0x002 /* add 0x or 0X prefix */
#define LADJUST 0x004 /* left adjustment */
#define LONGDBL 0x008 /* long double */
#define LONGINT 0x010 /* long integer */
#ifndef _NO_LONGLONG
# define QUADINT 0x020 /* quad integer */
#else /* ifdef _NO_LONGLONG, make QUADINT equivalent to LONGINT, so
that %lld behaves the same as %ld, not as %d, as expected if:
sizeof (long long) = sizeof long > sizeof int */
# define QUADINT LONGINT
#endif
#define SHORTINT 0x040 /* short integer */
#define ZEROPAD 0x080 /* zero (as opposed to blank) pad */
#define FPT 0x100 /* Floating point number */
#ifdef _WANT_IO_C99_FORMATS
# define CHARINT 0x200 /* char as integer */
#else /* define as 0, to make SARG and UARG occupy fewer instructions */
# define CHARINT 0
#endif
#ifdef _WANT_IO_C99_FORMATS
# define GROUPING 0x400 /* use grouping ("'" flag) */
#endif
#ifndef STRING_ONLY
int
_DEFUN(VFWPRINTF, (fp, fmt0, ap),
FILE * fp _AND
_CONST wchar_t *fmt0 _AND
va_list ap)
{
int result;
result = _VFWPRINTF_R (_REENT, fp, fmt0, ap);
return result;
}
#endif /* STRING_ONLY */
int
_DEFUN(_VFWPRINTF_R, (data, fp, fmt0, ap),
struct _reent *data _AND
FILE * fp _AND
_CONST wchar_t *fmt0 _AND
va_list ap)
{
register wchar_t *fmt; /* format string */
register wint_t ch; /* character from fmt */
register int n, m; /* handy integers (short term usage) */
register wchar_t *cp; /* handy char pointer (short term usage) */
register struct __siov *iovp;/* for PRINT macro */
register int flags; /* flags as above */
wchar_t *fmt_anchor; /* current format spec being processed */
#ifndef _NO_POS_ARGS
int N; /* arg number */
int arg_index; /* index into args processed directly */
int numargs; /* number of varargs read */
wchar_t *saved_fmt; /* saved fmt pointer */
union arg_val args[MAX_POS_ARGS];
int arg_type[MAX_POS_ARGS];
int is_pos_arg; /* is current format positional? */
int old_is_pos_arg; /* is current format positional? */
#endif
int ret; /* return value accumulator */
int width; /* width from format (%8d), or 0 */
int prec; /* precision from format (%.3d), or -1 */
wchar_t sign; /* sign prefix (' ', '+', '-', or \0) */
#ifdef _WANT_IO_C99_FORMATS
/* locale specific numeric grouping */
wchar_t thousands_sep;
const char *grouping;
#endif
#ifdef _MB_CAPABLE
mbstate_t state; /* mbtowc calls from library must not change state */
#endif
#ifdef FLOATING_POINT
wchar_t decimal_point;
wchar_t softsign; /* temporary negative sign for floats */
union { int i; _PRINTF_FLOAT_TYPE fp; } _double_ = {0};
# define _fpvalue (_double_.fp)
int expt; /* integer value of exponent */
int expsize = 0; /* character count for expstr */
wchar_t expstr[MAXEXPLEN]; /* buffer for exponent string */
int lead; /* sig figs before decimal or group sep */
#endif /* FLOATING_POINT */
#if defined (FLOATING_POINT) || defined (_WANT_IO_C99_FORMATS)
int ndig = 0; /* actual number of digits returned by cvt */
#endif
#ifdef _WANT_IO_C99_FORMATS
int nseps; /* number of group separators with ' */
int nrepeats; /* number of repeats of the last group */
#endif
u_quad_t _uquad; /* integer arguments %[diouxX] */
enum { OCT, DEC, HEX } base;/* base for [diouxX] conversion */
int dprec; /* a copy of prec if [diouxX], 0 otherwise */
int realsz; /* field size expanded by dprec */
int size = 0; /* size of converted field or string */
wchar_t *xdigs = NULL; /* digits for [xX] conversion */
#define NIOV 8
struct __suio uio; /* output information: summary */
struct __siov iov[NIOV];/* ... and individual io vectors */
wchar_t buf[BUF]; /* space for %c, %ls/%S, %[diouxX], %[aA] */
wchar_t ox[2]; /* space for 0x hex-prefix */
wchar_t *malloc_buf = NULL;/* handy pointer for malloced buffers */
/*
* Choose PADSIZE to trade efficiency vs. size. If larger printf
* fields occur frequently, increase PADSIZE and make the initialisers
* below longer.
*/
#define PADSIZE 16 /* pad chunk size */
static _CONST wchar_t blanks[PADSIZE] =
{L' ',L' ',L' ',L' ',L' ',L' ',L' ',L' ',
L' ',L' ',L' ',L' ',L' ',L' ',L' ',L' '};
static _CONST wchar_t zeroes[PADSIZE] =
{L'0',L'0',L'0',L'0',L'0',L'0',L'0',L'0',
L'0',L'0',L'0',L'0',L'0',L'0',L'0',L'0'};
#ifdef FLOATING_POINT
#ifdef _MB_CAPABLE
#ifdef __HAVE_LOCALE_INFO_EXTENDED__
decimal_point = *__get_current_numeric_locale ()->wdecimal_point;
#else
{
size_t nconv;
memset (&state, '\0', sizeof (state));
nconv = _mbrtowc_r (data, &decimal_point,
_localeconv_r (data)->decimal_point,
MB_CUR_MAX, &state);
if (nconv == (size_t) -1 || nconv == (size_t) -2)
decimal_point = L'.';
}
#endif
#else
decimal_point = (wchar_t) *_localeconv_r (data)->decimal_point;
#endif
#endif
/*
* BEWARE, these `goto error' on error, and PAD uses `n'.
*/
#define PRINT(ptr, len) { \
iovp->iov_base = (char *) (ptr); \
iovp->iov_len = (len) * sizeof (wchar_t); \
uio.uio_resid += (len) * sizeof (wchar_t); \
iovp++; \
if (++uio.uio_iovcnt >= NIOV) { \
if (__SPRINT(data, fp, &uio)) \
goto error; \
iovp = iov; \
} \
}
#define PAD(howmany, with) { \
if ((n = (howmany)) > 0) { \
while (n > PADSIZE) { \
PRINT (with, PADSIZE); \
n -= PADSIZE; \
} \
PRINT (with, n); \
} \
}
#define PRINTANDPAD(p, ep, len, with) { \
int n = (ep) - (p); \
if (n > (len)) \
n = (len); \
if (n > 0) \
PRINT((p), n); \
PAD((len) - (n > 0 ? n : 0), (with)); \
}
#define FLUSH() { \
if (uio.uio_resid && __SPRINT(data, fp, &uio)) \
goto error; \
uio.uio_iovcnt = 0; \
iovp = iov; \
}
/* Macros to support positional arguments */
#ifndef _NO_POS_ARGS
# define GET_ARG(n, ap, type) \
(is_pos_arg \
? (n < numargs \
? args[n].val_##type \
: get_arg (data, n, fmt_anchor, &ap, &numargs, args, \
arg_type, &saved_fmt)->val_##type) \
: (arg_index++ < numargs \
? args[n].val_##type \
: (numargs < MAX_POS_ARGS \
? args[numargs++].val_##type = va_arg (ap, type) \
: va_arg (ap, type))))
#else
# define GET_ARG(n, ap, type) (va_arg (ap, type))
#endif
/*
* To extend shorts properly, we need both signed and unsigned
* argument extraction methods.
*/
#ifndef _NO_LONGLONG
#define SARG() \
(flags&QUADINT ? GET_ARG (N, ap, quad_t) : \
flags&LONGINT ? GET_ARG (N, ap, long) : \
flags&SHORTINT ? (long)(short)GET_ARG (N, ap, int) : \
flags&CHARINT ? (long)(signed char)GET_ARG (N, ap, int) : \
(long)GET_ARG (N, ap, int))
#define UARG() \
(flags&QUADINT ? GET_ARG (N, ap, u_quad_t) : \
flags&LONGINT ? GET_ARG (N, ap, u_long) : \
flags&SHORTINT ? (u_long)(u_short)GET_ARG (N, ap, int) : \
flags&CHARINT ? (u_long)(unsigned char)GET_ARG (N, ap, int) : \
(u_long)GET_ARG (N, ap, u_int))
#else
#define SARG() \
(flags&LONGINT ? GET_ARG (N, ap, long) : \
flags&SHORTINT ? (long)(short)GET_ARG (N, ap, int) : \
flags&CHARINT ? (long)(signed char)GET_ARG (N, ap, int) : \
(long)GET_ARG (N, ap, int))
#define UARG() \
(flags&LONGINT ? GET_ARG (N, ap, u_long) : \
flags&SHORTINT ? (u_long)(u_short)GET_ARG (N, ap, int) : \
flags&CHARINT ? (u_long)(unsigned char)GET_ARG (N, ap, int) : \
(u_long)GET_ARG (N, ap, u_int))
#endif
#ifndef STRING_ONLY
/* Initialize std streams if not dealing with sprintf family. */
CHECK_INIT (data, fp);
_flockfile (fp);
ORIENT(fp, 1);
/* sorry, fwprintf(read_only_file, "") returns EOF, not 0 */
if (cantwrite (data, fp)) {
_funlockfile (fp);
return (EOF);
}
/* optimise fwprintf(stderr) (and other unbuffered Unix files) */
if ((fp->_flags & (__SNBF|__SWR|__SRW)) == (__SNBF|__SWR) &&
fp->_file >= 0) {
_funlockfile (fp);
return (__sbwprintf (data, fp, fmt0, ap));
}
#else /* STRING_ONLY */
/* Create initial buffer if we are called by asprintf family. */
if (fp->_flags & __SMBF && !fp->_bf._base)
{
fp->_bf._base = fp->_p = _malloc_r (data, 64);
if (!fp->_p)
{
data->_errno = ENOMEM;
return EOF;
}
fp->_bf._size = 64;
}
#endif /* STRING_ONLY */
fmt = (wchar_t *)fmt0;
uio.uio_iov = iovp = iov;
uio.uio_resid = 0;
uio.uio_iovcnt = 0;
ret = 0;
#ifndef _NO_POS_ARGS
arg_index = 0;
saved_fmt = NULL;
arg_type[0] = -1;
numargs = 0;
is_pos_arg = 0;
#endif
/*
* Scan the format for conversions (`%' character).
*/
for (;;) {
cp = fmt;
while (*fmt != L'\0' && *fmt != L'%')
++fmt;
if ((m = fmt - cp) != 0) {
PRINT (cp, m);
ret += m;
}
if (*fmt == L'\0')
goto done;
fmt_anchor = fmt;
fmt++; /* skip over '%' */
flags = 0;
dprec = 0;
width = 0;
prec = -1;
sign = L'\0';
#ifdef FLOATING_POINT
lead = 0;
#endif
#ifdef _WANT_IO_C99_FORMATS
nseps = nrepeats = 0;
#endif
#ifndef _NO_POS_ARGS
N = arg_index;
is_pos_arg = 0;
#endif
rflag: ch = *fmt++;
reswitch: switch (ch) {
#ifdef _WANT_IO_C99_FORMATS
case L'\'':
#ifdef _MB_CAPABLE
#ifdef __HAVE_LOCALE_INFO_EXTENDED__
thousands_sep = *__get_current_numeric_locale ()->wthousands_sep;
#else
{
size_t nconv;
memset (&state, '\0', sizeof (state));
nconv = _mbrtowc_r (data, &thousands_sep,
_localeconv_r (data)->thousands_sep,
MB_CUR_MAX, &state);
if (nconv == (size_t) -1 || nconv == (size_t) -2)
thousands_sep = L'\0';
}
#endif
#else
thousands_sep = (wchar_t) *_localeconv_r(data)->thousands_sep;
#endif
grouping = _localeconv_r (data)->grouping;
if (thousands_sep && grouping && *grouping)
flags |= GROUPING;
goto rflag;
#endif
case L' ':
/*
* ``If the space and + flags both appear, the space
* flag will be ignored.''
* -- ANSI X3J11
*/
if (!sign)
sign = L' ';
goto rflag;
case L'#':
flags |= ALT;
goto rflag;
case L'*':
#ifndef _NO_POS_ARGS
/* we must check for positional arg used for dynamic width */
n = N;
old_is_pos_arg = is_pos_arg;
is_pos_arg = 0;
if (is_digit (*fmt)) {
wchar_t *old_fmt = fmt;
n = 0;
ch = *fmt++;
do {
n = 10 * n + to_digit (ch);
ch = *fmt++;
} while (is_digit (ch));
if (ch == L'$') {
if (n <= MAX_POS_ARGS) {
n -= 1;
is_pos_arg = 1;
}
else
goto error;
}
else {
fmt = old_fmt;
goto rflag;
}
}
#endif /* !_NO_POS_ARGS */
/*
* ``A negative field width argument is taken as a
* - flag followed by a positive field width.''
* -- ANSI X3J11
* They don't exclude field widths read from args.
*/
width = GET_ARG (n, ap, int);
#ifndef _NO_POS_ARGS
is_pos_arg = old_is_pos_arg;
#endif
if (width >= 0)
goto rflag;
width = -width;
/* FALLTHROUGH */
case L'-':
flags |= LADJUST;
goto rflag;
case L'+':
sign = L'+';
goto rflag;
case L'.':
if ((ch = *fmt++) == L'*') {
#ifndef _NO_POS_ARGS
/* we must check for positional arg used for dynamic width */
n = N;
old_is_pos_arg = is_pos_arg;
is_pos_arg = 0;
if (is_digit (*fmt)) {
wchar_t *old_fmt = fmt;
n = 0;
ch = *fmt++;
do {
n = 10 * n + to_digit (ch);
ch = *fmt++;
} while (is_digit (ch));
if (ch == L'$') {
if (n <= MAX_POS_ARGS) {
n -= 1;
is_pos_arg = 1;
}
else
goto error;
}
else {
fmt = old_fmt;
goto rflag;
}
}
#endif /* !_NO_POS_ARGS */
prec = GET_ARG (n, ap, int);
#ifndef _NO_POS_ARGS
is_pos_arg = old_is_pos_arg;
#endif
if (prec < 0)
prec = -1;
goto rflag;
}
n = 0;
while (is_digit (ch)) {
n = 10 * n + to_digit (ch);
ch = *fmt++;
}
prec = n < 0 ? -1 : n;
goto reswitch;
case L'0':
/*
* ``Note that 0 is taken as a flag, not as the
* beginning of a field width.''
* -- ANSI X3J11
*/
flags |= ZEROPAD;
goto rflag;
case L'1': case L'2': case L'3': case L'4':
case L'5': case L'6': case L'7': case L'8': case L'9':
n = 0;
do {
n = 10 * n + to_digit (ch);
ch = *fmt++;
} while (is_digit (ch));
#ifndef _NO_POS_ARGS
if (ch == L'$') {
if (n <= MAX_POS_ARGS) {
N = n - 1;
is_pos_arg = 1;
goto rflag;
}
else
goto error;
}
#endif /* !_NO_POS_ARGS */
width = n;
goto reswitch;
#ifdef FLOATING_POINT
case L'L':
flags |= LONGDBL;
goto rflag;
#endif
case L'h':
#ifdef _WANT_IO_C99_FORMATS
if (*fmt == L'h') {
fmt++;
flags |= CHARINT;
} else
#endif
flags |= SHORTINT;
goto rflag;
case L'l':
#if defined _WANT_IO_C99_FORMATS || !defined _NO_LONGLONG
if (*fmt == L'l') {
fmt++;
flags |= QUADINT;
} else
#endif
flags |= LONGINT;
goto rflag;
case L'q': /* GNU extension */
flags |= QUADINT;
goto rflag;
#ifdef _WANT_IO_C99_FORMATS
case L'j':
if (sizeof (intmax_t) == sizeof (long))
flags |= LONGINT;
else
flags |= QUADINT;
goto rflag;
case L'z':
if (sizeof (size_t) < sizeof (int))
/* POSIX states size_t is 16 or more bits, as is short. */
flags |= SHORTINT;
else if (sizeof (size_t) == sizeof (int))
/* no flag needed */;
else if (sizeof (size_t) <= sizeof (long))
flags |= LONGINT;
else
/* POSIX states that at least one programming
environment must support size_t no wider than
long, but that means other environments can
have size_t as wide as long long. */
flags |= QUADINT;
goto rflag;
case L't':
if (sizeof (ptrdiff_t) < sizeof (int))
/* POSIX states ptrdiff_t is 16 or more bits, as
is short. */
flags |= SHORTINT;
else if (sizeof (ptrdiff_t) == sizeof (int))
/* no flag needed */;
else if (sizeof (ptrdiff_t) <= sizeof (long))
flags |= LONGINT;
else
/* POSIX states that at least one programming
environment must support ptrdiff_t no wider than
long, but that means other environments can
have ptrdiff_t as wide as long long. */
flags |= QUADINT;
goto rflag;
case L'C': /* POSIX extension */
#endif /* _WANT_IO_C99_FORMATS */
case L'c':
cp = buf;
if (ch == L'c' && !(flags & LONGINT)) {
wint_t wc = btowc ((int) GET_ARG (N, ap, int));
if (wc == WEOF) {
fp->_flags |= __SERR;
goto error;
}
cp[0] = (wchar_t) wc;
}
else
{
cp[0] = GET_ARG (N, ap, int);
}
cp[1] = L'\0';
size = 1;
sign = L'\0';
break;
case L'd':
case L'i':
_uquad = SARG ();
#ifndef _NO_LONGLONG
if ((quad_t)_uquad < 0)
#else
if ((long) _uquad < 0)
#endif
{
_uquad = -_uquad;
sign = L'-';
}
base = DEC;
goto number;
#ifdef FLOATING_POINT
# ifdef _WANT_IO_C99_FORMATS
case L'a':
case L'A':
case L'F':
# endif
case L'e':
case L'E':
case L'f':
case L'g':
case L'G':
# ifdef _NO_LONGDBL
if (flags & LONGDBL) {
_fpvalue = (double) GET_ARG (N, ap, _LONG_DOUBLE);
} else {
_fpvalue = GET_ARG (N, ap, double);
}
/* do this before tricky precision changes
If the output is infinite or NaN, leading
zeros are not permitted. Otherwise, scanf
could not read what printf wrote.
*/
if (isinf (_fpvalue)) {
if (_fpvalue < 0)
sign = '-';
if (ch <= L'G') /* 'A', 'E', 'F', or 'G' */
cp = L"INF";
else
cp = L"inf";
size = 3;
flags &= ~ZEROPAD;
break;
}
if (isnan (_fpvalue)) {
if (ch <= L'G') /* 'A', 'E', 'F', or 'G' */
cp = L"NAN";
else
cp = L"nan";
size = 3;
flags &= ~ZEROPAD;
break;
}
# else /* !_NO_LONGDBL */
if (flags & LONGDBL) {
_fpvalue = GET_ARG (N, ap, _LONG_DOUBLE);
} else {
_fpvalue = (_LONG_DOUBLE)GET_ARG (N, ap, double);
}
/* do this before tricky precision changes */
expt = _ldcheck (&_fpvalue);
if (expt == 2) {
if (_fpvalue < 0)
sign = L'-';
if (ch <= L'G') /* 'A', 'E', 'F', or 'G' */
cp = L"INF";
else
cp = L"inf";
size = 3;
flags &= ~ZEROPAD;
break;
}
if (expt == 1) {
if (ch <= L'G') /* 'A', 'E', 'F', or 'G' */
cp = L"NAN";
else
cp = L"nan";
size = 3;
flags &= ~ZEROPAD;
break;
}
# endif /* !_NO_LONGDBL */
cp = buf;
# ifdef _WANT_IO_C99_FORMATS
if (ch == L'a' || ch == L'A') {
ox[0] = L'0';
ox[1] = ch == L'a' ? L'x' : L'X';
flags |= HEXPREFIX;
if (prec >= BUF)
{
if ((malloc_buf =
(wchar_t *)_malloc_r (data, (prec + 1) * sizeof (wchar_t)))
== NULL)
{
fp->_flags |= __SERR;
goto error;
}
cp = malloc_buf;
}
} else
# endif /* _WANT_IO_C99_FORMATS */
if (prec == -1) {
prec = DEFPREC;
} else if ((ch == L'g' || ch == L'G') && prec == 0) {
prec = 1;
}
flags |= FPT;
cp = wcvt (data, _fpvalue, prec, flags, &softsign,
&expt, ch, &ndig, cp, BUF);
/* If buf is not large enough for the converted wchar_t
sequence, call wcvt again with a malloced new buffer.
This should happen fairly rarely.
*/
if (cp == buf && ndig > BUF && malloc_buf == NULL) {
if ((malloc_buf =
(wchar_t *)_malloc_r (data, ndig * sizeof (wchar_t)))
== NULL)
{
fp->_flags |= __SERR;
goto error;
}
cp = wcvt (data, _fpvalue, prec, flags, &softsign,
&expt, ch, &ndig, malloc_buf, ndig);
}
if (ch == L'g' || ch == L'G') {
if (expt <= -4 || expt > prec)
ch -= 2; /* 'e' or 'E' */
else
ch = L'g';
}
# ifdef _WANT_IO_C99_FORMATS
else if (ch == L'F')
ch = L'f';
# endif
if (ch <= L'e') { /* 'a', 'A', 'e', or 'E' fmt */
--expt;
expsize = wexponent (expstr, expt, ch);
size = expsize + ndig;
if (ndig > 1 || flags & ALT)
++size;
# ifdef _WANT_IO_C99_FORMATS
flags &= ~GROUPING;
# endif
} else {
if (ch == L'f') { /* f fmt */
if (expt > 0) {
size = expt;
if (prec || flags & ALT)
size += prec + 1;
} else /* "0.X" */
size = (prec || flags & ALT)
? prec + 2
: 1;
} else if (expt >= ndig) { /* fixed g fmt */
size = expt;
if (flags & ALT)
++size;
} else
size = ndig + (expt > 0 ?
1 : 2 - expt);
# ifdef _WANT_IO_C99_FORMATS
if ((flags & GROUPING) && expt > 0) {
/* space for thousands' grouping */
nseps = nrepeats = 0;
lead = expt;
while (*grouping != CHAR_MAX) {
if (lead <= *grouping)
break;
lead -= *grouping;
if (grouping[1]) {
nseps++;
grouping++;
} else
nrepeats++;
}
size += nseps + nrepeats;
} else
# endif
lead = expt;
}
if (softsign)
sign = L'-';
break;
#endif /* FLOATING_POINT */
case L'n':
#ifndef _NO_LONGLONG
if (flags & QUADINT)
*GET_ARG (N, ap, quad_ptr_t) = ret;
else
#endif
if (flags & LONGINT)
*GET_ARG (N, ap, long_ptr_t) = ret;
else if (flags & SHORTINT)
*GET_ARG (N, ap, short_ptr_t) = ret;
#ifdef _WANT_IO_C99_FORMATS
else if (flags & CHARINT)
*GET_ARG (N, ap, char_ptr_t) = ret;
#endif
else
*GET_ARG (N, ap, int_ptr_t) = ret;
continue; /* no output */
case L'o':
_uquad = UARG ();
base = OCT;
#ifdef _WANT_IO_C99_FORMATS
flags &= ~GROUPING;
#endif
goto nosign;
case L'p':
/*
* ``The argument shall be a pointer to void. The
* value of the pointer is converted to a sequence
* of printable characters, in an implementation-
* defined manner.''
* -- ANSI X3J11
*/
/* NOSTRICT */
_uquad = (uintptr_t) GET_ARG (N, ap, void_ptr_t);
base = HEX;
xdigs = L"0123456789abcdef";
flags |= HEXPREFIX;
ox[0] = L'0';
ox[1] = ch = L'x';
goto nosign;
case L's':
#ifdef _WANT_IO_C99_FORMATS
case L'S': /* POSIX extension */
#endif
sign = '\0';
cp = GET_ARG (N, ap, wchar_ptr_t);
#ifndef __OPTIMIZE_SIZE__
/* Behavior is undefined if the user passed a
NULL string when precision is not 0.
However, if we are not optimizing for size,
we might as well mirror glibc behavior. */
if (cp == NULL) {
cp = L"(null)";
size = ((unsigned) prec > 6U) ? 6 : prec;
}
else
#endif /* __OPTIMIZE_SIZE__ */
#ifdef _MB_CAPABLE
if (ch == L's' && !(flags & LONGINT)) {
char *arg = (char *) cp;
size_t insize = 0, nchars = 0, nconv = 0;
mbstate_t ps;
wchar_t *p;
if (prec >= 0) {
char *p = arg;
memset ((_PTR)&ps, '\0', sizeof (mbstate_t));
while (nchars < (size_t)prec) {
nconv = mbrlen (p, MB_CUR_MAX, &ps);
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) {
fp->_flags |= __SERR;
goto error;
}
} else
insize = strlen(arg);
if (insize >= BUF) {
if ((malloc_buf = (wchar_t *) _malloc_r (data, (insize + 1) * sizeof (wchar_t)))
== NULL) {
fp->_flags |= __SERR;
goto error;
}
cp = malloc_buf;
} else
cp = buf;
memset ((_PTR)&ps, '\0', sizeof (mbstate_t));
p = cp;
while (insize != 0) {
nconv = _mbrtowc_r (data, p, arg, insize, &ps);
if (nconv == 0 || nconv == (size_t)-1 || nconv == (size_t)-2)
break;
++p;
arg += nconv;
insize -= nconv;
}
if (nconv == (size_t) -1 || nconv == (size_t) -2) {
fp->_flags |= __SERR;
goto error;
}
*p = L'\0';
size = p - cp;
}
else
#endif /* _MB_CAPABLE */
if (prec >= 0) {
/*
* can't use wcslen; can only look for the
* NUL in the first `prec' characters, and
* strlen () will go further.
*/
wchar_t *p = wmemchr (cp, L'\0', prec);
if (p != NULL) {
size = p - cp;
if (size > prec)
size = prec;
} else
size = prec;
} else
size = wcslen (cp);
break;
case L'u':
_uquad = UARG ();
base = DEC;
goto nosign;
case L'X':
xdigs = L"0123456789ABCDEF";
goto hex;
case 'x':
xdigs = L"0123456789abcdef";
hex: _uquad = UARG ();
base = HEX;
/* leading 0x/X only if non-zero */
if (flags & ALT && _uquad != 0) {
ox[0] = L'0';
ox[1] = ch;
flags |= HEXPREFIX;
}
#ifdef _WANT_IO_C99_FORMATS
flags &= ~GROUPING;
#endif
/* unsigned conversions */
nosign: sign = L'\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 (_uquad != 0 || prec != 0) {
/*
* Unsigned mod is hard, and unsigned mod
* by a constant is easier than that by
* a variable; hence this switch.
*/
switch (base) {
case OCT:
do {
*--cp = to_char (_uquad & 7);
_uquad >>= 3;
} while (_uquad);
/* handle octal leading 0 */
if (flags & ALT && *cp != L'0')
*--cp = L'0';
break;
case DEC:
/* many numbers are 1 digit */
if (_uquad < 10) {
*--cp = to_char(_uquad);
break;
}
#ifdef _WANT_IO_C99_FORMATS
ndig = 0;
#endif
do {
*--cp = to_char (_uquad % 10);
#ifdef _WANT_IO_C99_FORMATS
ndig++;
/* If (*grouping == CHAR_MAX) then no
more grouping */
if ((flags & GROUPING)
&& ndig == *grouping
&& *grouping != CHAR_MAX
&& _uquad > 9) {
*--cp = thousands_sep;
ndig = 0;
/* If (grouping[1] == '\0') then we
have to use *grouping character
(last grouping rule) for all
next cases. */
if (grouping[1] != '\0')
grouping++;
}
#endif
_uquad /= 10;
} while (_uquad != 0);
break;
case HEX:
do {
*--cp = xdigs[_uquad & 15];
_uquad >>= 4;
} while (_uquad);
break;
default:
cp = L"bug in vfprintf: bad base";
size = wcslen (cp);
goto skipsize;
}
}
/*
* ...result is to be converted to an 'alternate form'.
* For o conversion, it increases the precision to force
* the first digit of the result to be a zero."
* -- ANSI X3J11
*
* To demonstrate this case, compile and run:
* printf ("%#.0o",0);
*/
else if (base == OCT && (flags & ALT))
*--cp = L'0';
size = buf + BUF - cp;
skipsize:
break;
default: /* "%?" prints ?, unless ? is NUL */
if (ch == L'\0')
goto done;
/* pretend it was %c with argument ch */
cp = buf;
*cp = ch;
size = 1;
sign = L'\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.
* If flags&FPT, ch must be in [aAeEfg].
*
* 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 (flags & HEXPREFIX)
realsz+= 2;
/* right-adjusting blank padding */
if ((flags & (LADJUST|ZEROPAD)) == 0)
PAD (width - realsz, blanks);
/* prefix */
if (sign)
PRINT (&sign, 1);
if (flags & HEXPREFIX)
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 >= L'f') { /* 'f' or 'g' */
if (_fpvalue == 0) {
/* kludge for __dtoa irregularity */
PRINT (L"0", 1);
if (expt < ndig || flags & ALT) {
PRINT (&decimal_point, 1);
PAD (ndig - 1, zeroes);
}
} else if (expt <= 0) {
PRINT (L"0", 1);
if (expt || ndig || flags & ALT) {
PRINT (&decimal_point, 1);
PAD (-expt, zeroes);
PRINT (cp, ndig);
}
} else {
wchar_t *convbuf = cp;
PRINTANDPAD(cp, convbuf + ndig,
lead, zeroes);
cp += lead;
#ifdef _WANT_IO_C99_FORMATS
if (flags & GROUPING) {
while (nseps > 0 || nrepeats > 0) {
if (nrepeats > 0)
nrepeats--;
else {
grouping--;
nseps--;
}
PRINT (&thousands_sep, 1);
PRINTANDPAD (cp, convbuf + ndig,
*grouping, zeroes);
cp += *grouping;
}
if (cp > convbuf + ndig)
cp = convbuf + ndig;
}
#endif
if (expt < ndig || flags & ALT)
PRINT (&decimal_point, 1);
PRINTANDPAD (cp, convbuf + ndig,
ndig - expt, zeroes);
}
} else { /* 'a', 'A', 'e', or 'E' */
if (ndig > 1 || flags & ALT) {
PRINT (cp, 1);
cp++;
PRINT (&decimal_point, 1);
if (_fpvalue) {
PRINT (cp, ndig - 1);
} else /* 0.[0..] */
/* __dtoa irregularity */
PAD (ndig - 1, zeroes);
} else /* XeYYY */
PRINT (cp, 1);
PRINT (expstr, expsize);
}
}
#else /* !FLOATING_POINT */
PRINT (cp, size);
#endif
/* left-adjusting padding (always blank) */
if (flags & LADJUST)
PAD (width - realsz, blanks);
/* finally, adjust ret */
ret += width > realsz ? width : realsz;
FLUSH (); /* copy out the I/O vectors */
if (malloc_buf != NULL) {
_free_r (data, malloc_buf);
malloc_buf = NULL;
}
}
done:
FLUSH ();
error:
if (malloc_buf != NULL)
_free_r (data, malloc_buf);
#ifndef STRING_ONLY
_funlockfile (fp);
#endif
return (__sferror (fp) ? EOF : ret);
/* NOTREACHED */
}
#ifdef FLOATING_POINT
/* Using reentrant DATA, convert finite VALUE into a string of digits
with no decimal point, using NDIGITS precision and FLAGS as guides
to whether trailing zeros must be included. Set *SIGN to nonzero
if VALUE was negative. Set *DECPT to the exponent plus one. Set
*LENGTH to the length of the returned string. CH must be one of
[aAeEfFgG]; different from vfprintf.c:cvt(), the return string
lives in BUF regardless of CH. LEN is the length of BUF, except
when CH is [aA], in which case LEN is not in use. If BUF is not
large enough for the converted string, only the first LEN number
of characters will be returned in BUF, but *LENGTH will be set to
the full length of the string before the truncation. */
static wchar_t *
wcvt(struct _reent *data, _PRINTF_FLOAT_TYPE value, int ndigits, int flags,
wchar_t *sign, int *decpt, int ch, int *length, wchar_t *buf, int len)
{
int mode, dsgn;
# ifdef _NO_LONGDBL
union double_union tmp;
tmp.d = value;
if (word0 (tmp) & Sign_bit) { /* this will check for < 0 and -0.0 */
value = -value;
*sign = L'-';
} else
*sign = L'\0';
# else /* !_NO_LONGDBL */
union
{
struct ldieee ieee;
_LONG_DOUBLE val;
} ld;
ld.val = value;
if (ld.ieee.sign) { /* this will check for < 0 and -0.0 */
value = -value;
*sign = L'-';
} else
*sign = L'\0';
# endif /* !_NO_LONGDBL */
# ifdef _WANT_IO_C99_FORMATS
if (ch == L'a' || ch == L'A') {
wchar_t *digits, *bp, *rve;
/* This code assumes FLT_RADIX is a power of 2. The initial
division ensures the digit before the decimal will be less
than FLT_RADIX (unless it is rounded later). There is no
loss of precision in these calculations. */
value = FREXP (value, decpt) / 8;
if (!value)
*decpt = 1;
digits = ch == L'a' ? L"0123456789abcdef" : L"0123456789ABCDEF";
bp = buf;
do {
value *= 16;
mode = (int) value;
value -= mode;
*bp++ = digits[mode];
} while (ndigits-- && value);
if (value > 0.5 || (value == 0.5 && mode & 1)) {
/* round to even */
rve = bp;
while (*--rve == digits[0xf]) {
*rve = L'0';
}
*rve = *rve == L'9' ? digits[0xa] : *rve + 1;
} else {
while (ndigits-- >= 0) {
*bp++ = L'0';
}
}
*length = bp - buf;
return buf;
}
# endif /* _WANT_IO_C99_FORMATS */
if (ch == L'f' || ch == L'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 == L'e' || ch == L'E') {
ndigits++;
}
mode = 2; /* ndigits significant digits */
}
{
char *digits, *bp, *rve;
#ifndef _MB_CAPABLE
int i;
#endif
digits = _DTOA_R (data, value, mode, ndigits, decpt, &dsgn, &rve);
if ((ch != L'g' && ch != L'G') || flags & ALT) { /* Print trailing zeros */
bp = digits + ndigits;
if (ch == L'f' || ch == L'F') {
if (*digits == L'0' && value)
*decpt = -ndigits + 1;
bp += *decpt;
}
if (value == 0) /* kludge for __dtoa irregularity */
rve = bp;
while (rve < bp)
*rve++ = '0';
}
*length = rve - digits; /* full length of the string */
#ifdef _MB_CAPABLE
_mbsnrtowcs_r (data, buf, (const char **) &digits, *length,
len, NULL);
#else
for (i = 0; i < *length && i < len; ++i)
buf[i] = (wchar_t) digits[i];
#endif
return buf;
}
}
static int
wexponent(wchar_t *p0, int exp, int fmtch)
{
register wchar_t *p, *t;
wchar_t expbuf[MAXEXPLEN];
# ifdef _WANT_IO_C99_FORMATS
int isa = fmtch == L'a' || fmtch == L'A';
# else
# define isa 0
# endif
p = p0;
*p++ = isa ? L'p' - L'a' + fmtch : fmtch;
if (exp < 0) {
exp = -exp;
*p++ = L'-';
}
else
*p++ = L'+';
t = expbuf + MAXEXPLEN;
if (exp > 9) {
do {
*--t = to_char (exp % 10);
} while ((exp /= 10) > 9);
*--t = to_char (exp);
for (; t < expbuf + MAXEXPLEN; *p++ = *t++);
}
else {
if (!isa)
*p++ = L'0';
*p++ = to_char (exp);
}
return (p - p0);
}
#endif /* FLOATING_POINT */
#ifndef _NO_POS_ARGS
/* Positional argument support.
Written by Jeff Johnston
Copyright (c) 2002 Red Hat Incorporated.
All rights reserved.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met:
Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.
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.
The name of Red Hat Incorporated may not be used to endorse
or promote products derived from this software without specific
prior written permission.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS 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 RED HAT INCORPORATED 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. */
/* function to get positional parameter N where n = N - 1 */
static union arg_val *
_DEFUN(get_arg, (data, n, fmt, ap, numargs_p, args, arg_type, last_fmt),
struct _reent *data _AND
int n _AND
wchar_t *fmt _AND
va_list *ap _AND
int *numargs_p _AND
union arg_val *args _AND
int *arg_type _AND
wchar_t **last_fmt)
{
wchar_t ch;
int number, flags;
int spec_type;
int numargs = *numargs_p;
__CH_CLASS chtype;
__STATE state, next_state;
__ACTION action;
int pos, last_arg;
int max_pos_arg = n;
/* Only need types that can be reached via vararg promotions. */
enum types { INT, LONG_INT, QUAD_INT, CHAR_PTR, DOUBLE, LONG_DOUBLE, WIDE_CHAR };
/* if this isn't the first call, pick up where we left off last time */
if (*last_fmt != NULL)
fmt = *last_fmt;
/* we need to process either to end of fmt string or until we have actually
read the desired parameter from the vararg list. */
while (*fmt && n >= numargs)
{
while (*fmt != L'\0' && *fmt != L'%')
fmt += 1;
if (*fmt == L'\0')
break;
state = START;
flags = 0;
pos = -1;
number = 0;
spec_type = INT;
/* Use state/action table to process format specifiers. We ignore invalid
formats and we are only interested in information that tells us how to
read the vararg list. */
while (state != DONE)
{
ch = *fmt++;
chtype = ch < (wchar_t) 256 ? __chclass[ch] : OTHER;
next_state = __state_table[state][chtype];
action = __action_table[state][chtype];
state = next_state;
switch (action)
{
case GETMOD: /* we have format modifier */
switch (ch)
{
case L'h':
/* No flag needed, since short and char promote to int. */
break;
case L'L':
flags |= LONGDBL;
break;
case L'q':
flags |= QUADINT;
break;
# ifdef _WANT_IO_C99_FORMATS
case L'j':
if (sizeof (intmax_t) == sizeof (long))
flags |= LONGINT;
else
flags |= QUADINT;
break;
case L'z':
if (sizeof (size_t) <= sizeof (int))
/* no flag needed */;
else if (sizeof (size_t) <= sizeof (long))
flags |= LONGINT;
else
/* POSIX states that at least one programming
environment must support size_t no wider than
long, but that means other environments can
have size_t as wide as long long. */
flags |= QUADINT;
break;
case L't':
if (sizeof (ptrdiff_t) <= sizeof (int))
/* no flag needed */;
else if (sizeof (ptrdiff_t) <= sizeof (long))
flags |= LONGINT;
else
/* POSIX states that at least one programming
environment must support ptrdiff_t no wider than
long, but that means other environments can
have ptrdiff_t as wide as long long. */
flags |= QUADINT;
break;
# endif /* _WANT_IO_C99_FORMATS */
case L'l':
default:
# if defined _WANT_IO_C99_FORMATS || !defined _NO_LONGLONG
if (*fmt == L'l')
{
flags |= QUADINT;
++fmt;
}
else
# endif
flags |= LONGINT;
break;
}
break;
case GETARG: /* we have format specifier */
{
numargs &= (MAX_POS_ARGS - 1);
/* process the specifier and translate it to a type to fetch from varargs */
switch (ch)
{
case L'd':
case L'i':
case L'o':
case L'x':
case L'X':
case L'u':
if (flags & LONGINT)
spec_type = LONG_INT;
# ifndef _NO_LONGLONG
else if (flags & QUADINT)
spec_type = QUAD_INT;
# endif
else
spec_type = INT;
break;
# ifdef _WANT_IO_C99_FORMATS
case L'a':
case L'A':
case L'F':
# endif
case L'f':
case L'g':
case L'G':
case L'E':
case L'e':
# ifndef _NO_LONGDBL
if (flags & LONGDBL)
spec_type = LONG_DOUBLE;
else
# endif
spec_type = DOUBLE;
break;
case L's':
# ifdef _WANT_IO_C99_FORMATS
case L'S': /* POSIX extension */
# endif
case L'p':
case L'n':
spec_type = CHAR_PTR;
break;
case L'c':
# ifdef _WANT_IO_C99_FORMATS
if (flags & LONGINT)
spec_type = WIDE_CHAR;
else
# endif
spec_type = INT;
break;
# ifdef _WANT_IO_C99_FORMATS
case L'C': /* POSIX extension */
spec_type = WIDE_CHAR;
break;
# endif
}
/* if we have a positional parameter, just store the type, otherwise
fetch the parameter from the vararg list */
if (pos != -1)
arg_type[pos] = spec_type;
else
{
switch (spec_type)
{
case LONG_INT:
args[numargs++].val_long = va_arg (*ap, long);
break;
case QUAD_INT:
args[numargs++].val_quad_t = va_arg (*ap, quad_t);
break;
case WIDE_CHAR:
args[numargs++].val_wint_t = va_arg (*ap, wint_t);
break;
case INT:
args[numargs++].val_int = va_arg (*ap, int);
break;
case CHAR_PTR:
args[numargs++].val_wchar_ptr_t = va_arg (*ap, wchar_t *);
break;
case DOUBLE:
args[numargs++].val_double = va_arg (*ap, double);
break;
case LONG_DOUBLE:
args[numargs++].val__LONG_DOUBLE = va_arg (*ap, _LONG_DOUBLE);
break;
}
}
}
break;
case GETPOS: /* we have positional specifier */
if (arg_type[0] == -1)
memset (arg_type, 0, sizeof (int) * MAX_POS_ARGS);
pos = number - 1;
max_pos_arg = (max_pos_arg > pos ? max_pos_arg : pos);
break;
case PWPOS: /* we have positional specifier for width or precision */
if (arg_type[0] == -1)
memset (arg_type, 0, sizeof (int) * MAX_POS_ARGS);
number -= 1;
arg_type[number] = INT;
max_pos_arg = (max_pos_arg > number ? max_pos_arg : number);
break;
case GETPWB: /* we require format pushback */
--fmt;
/* fallthrough */
case GETPW: /* we have a variable precision or width to acquire */
args[numargs++].val_int = va_arg (*ap, int);
break;
case NUMBER: /* we have a number to process */
number = (ch - '0');
while ((ch = *fmt) != '\0' && is_digit (ch))
{
number = number * 10 + (ch - '0');
++fmt;
}
break;
case SKIPNUM: /* we have a number to skip */
while ((ch = *fmt) != '\0' && is_digit (ch))
++fmt;
break;
case NOOP:
default:
break; /* do nothing */
}
}
}
/* process all arguments up to at least the one we are looking for and if we
have seen the end of the string, then process up to the max argument needed */
if (*fmt == '\0')
last_arg = max_pos_arg;
else
last_arg = n;
while (numargs <= last_arg)
{
switch (arg_type[numargs])
{
case LONG_INT:
args[numargs++].val_long = va_arg (*ap, long);
break;
case QUAD_INT:
args[numargs++].val_quad_t = va_arg (*ap, quad_t);
break;
case CHAR_PTR:
args[numargs++].val_wchar_ptr_t = va_arg (*ap, wchar_t *);
break;
case DOUBLE:
args[numargs++].val_double = va_arg (*ap, double);
break;
case LONG_DOUBLE:
args[numargs++].val__LONG_DOUBLE = va_arg (*ap, _LONG_DOUBLE);
break;
case WIDE_CHAR:
args[numargs++].val_wint_t = va_arg (*ap, wint_t);
break;
case INT:
default:
args[numargs++].val_int = va_arg (*ap, int);
break;
}
}
/* alter the global numargs value and keep a reference to the last bit of the fmt
string we processed here because the caller will continue processing where we started */
*numargs_p = numargs;
*last_fmt = fmt;
return &args[n];
}
#endif /* !_NO_POS_ARGS */
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