0,0 → 1,1499 |
/*- |
* Copyright (c) 1990 The Regents of the University of California. |
* All rights reserved. |
* |
* Redistribution and use in source and binary forms are permitted |
* provided that the above copyright notice and this paragraph are |
* duplicated in all such forms and that any documentation, |
* advertising materials, and other materials related to such |
* distribution and use acknowledge that the software was developed |
* by the University of California, Berkeley. The name of the |
* University may not be used to endorse or promote products derived |
* from this software without specific prior written permission. |
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR |
* IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED |
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. |
*/ |
|
/* |
FUNCTION |
<<vfwscanf>>, <<vwscanf>>, <<vswscanf>>---scan and format argument list from wide character input |
|
INDEX |
vfwscanf |
INDEX |
_vfwscanf |
INDEX |
vwscanf |
INDEX |
_vwscanf |
INDEX |
vswscanf |
INDEX |
_vswscanf |
|
ANSI_SYNOPSIS |
#include <stdio.h> |
#include <stdarg.h> |
int vwscanf(const wchar_t *__restrict <[fmt]>, va_list <[list]>); |
int vfwscanf(FILE *__restrict <[fp]>, |
const wchar_t *__restrict <[fmt]>, va_list <[list]>); |
int vswscanf(const wchar_t *__restrict <[str]>, |
const wchar_t *__restrict <[fmt]>, va_list <[list]>); |
|
int _vwscanf(struct _reent *<[reent]>, const wchar_t *<[fmt]>, |
va_list <[list]>); |
int _vfwscanf(struct _reent *<[reent]>, FILE *<[fp]>, |
const wchar_t *<[fmt]>, va_list <[list]>); |
int _vswscanf(struct _reent *<[reent]>, const wchar_t *<[str]>, |
const wchar_t *<[fmt]>, va_list <[list]>); |
|
TRAD_SYNOPSIS |
#include <stdio.h> |
#include <varargs.h> |
int vwscanf( <[fmt]>, <[ist]>) |
wchar_t *__restrict <[fmt]>; |
va_list <[list]>; |
|
int vfwscanf( <[fp]>, <[fmt]>, <[list]>) |
FILE *__restrict <[fp]>; |
wchar_t *__restrict <[fmt]>; |
va_list <[list]>; |
|
int vswscanf( <[str]>, <[fmt]>, <[list]>) |
wchar_t *__restrict <[str]>; |
wchar_t *__restrict <[fmt]>; |
va_list <[list]>; |
|
int _vwscanf( <[reent]>, <[fmt]>, <[ist]>) |
struct _reent *<[reent]>; |
wchar_t *<[fmt]>; |
va_list <[list]>; |
|
int _vfwscanf( <[reent]>, <[fp]>, <[fmt]>, <[list]>) |
struct _reent *<[reent]>; |
FILE *<[fp]>; |
wchar_t *<[fmt]>; |
va_list <[list]>; |
|
int _vswscanf( <[reent]>, <[str]>, <[fmt]>, <[list]>) |
struct _reent *<[reent]>; |
wchar_t *<[str]>; |
wchar_t *<[fmt]>; |
va_list <[list]>; |
|
DESCRIPTION |
<<vwscanf>>, <<vfwscanf>>, and <<vswscanf>> are (respectively) variants |
of <<wscanf>>, <<fwscanf>>, and <<swscanf>>. 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. |
|
RETURNS |
The return values are consistent with the corresponding functions: |
<<vwscanf>> returns the number of input fields successfully scanned, |
converted, and stored; the return value does not include scanned |
fields which were not stored. |
|
If <<vwscanf>> attempts to read at end-of-file, the return value |
is <<EOF>>. |
|
If no fields were stored, the return value is <<0>>. |
|
The routines <<_vwscanf>>, <<_vfwscanf>>, and <<_vswscanf>> are |
reentrant versions which take an additional first parameter which points |
to the reentrancy structure. |
|
PORTABILITY |
C99, POSIX-1.2008 |
*/ |
|
#include <_ansi.h> |
#include <reent.h> |
#include <newlib.h> |
#include <ctype.h> |
#include <wctype.h> |
#include <stdio.h> |
#include <stdlib.h> |
#include <stdint.h> |
#include <limits.h> |
#include <wchar.h> |
#include <string.h> |
#include <stdarg.h> |
#include <errno.h> |
#include "local.h" |
|
#ifdef INTEGER_ONLY |
#define VFWSCANF vfiwscanf |
#define _VFWSCANF_R _vfiwscanf_r |
#define __SVFWSCANF __svfiwscanf |
#ifdef STRING_ONLY |
# define __SVFWSCANF_R __ssvfiwscanf_r |
#else |
# define __SVFWSCANF_R __svfiwscanf_r |
#endif |
#else |
#define VFWSCANF vfwscanf |
#define _VFWSCANF_R _vfwscanf_r |
#define __SVFWSCANF __svfwscanf |
#ifdef STRING_ONLY |
# define __SVFWSCANF_R __ssvfwscanf_r |
#else |
# define __SVFWSCANF_R __svfwscanf_r |
#endif |
#ifndef NO_FLOATING_POINT |
#define FLOATING_POINT |
#endif |
#endif |
|
#ifdef STRING_ONLY |
#undef _newlib_flockfile_start |
#undef _newlib_flockfile_exit |
#undef _newlib_flockfile_end |
#define _newlib_flockfile_start(x) {} |
#define _newlib_flockfile_exit(x) {} |
#define _newlib_flockfile_end(x) {} |
#define _ungetwc_r _sungetwc_r |
#define __srefill_r __ssrefill_r |
#define _fgetwc_r _sfgetwc_r |
#endif |
|
#ifdef FLOATING_POINT |
#include <math.h> |
#include <float.h> |
#include <locale.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 |
extern _LONG_DOUBLE _wcstold_r _PARAMS((wchar_t *s, wchar_t **sptr)); |
#endif |
|
#include "floatio.h" |
|
#if ((MAXEXP+MAXFRACT+3) > MB_LEN_MAX) |
# define BUF (MAXEXP+MAXFRACT+3) /* 3 = sign + decimal point + NUL */ |
#else |
# define BUF MB_LEN_MAX |
#endif |
|
/* An upper bound for how long a long prints in decimal. 4 / 13 approximates |
log (2). Add one char for roundoff compensation and one for the sign. */ |
#define MAX_LONG_LEN ((CHAR_BIT * sizeof (long) - 1) * 4 / 13 + 2) |
#else |
#define BUF 40 |
#endif |
|
#define _NO_LONGLONG |
#if defined _WANT_IO_LONG_LONG \ |
&& (defined __GNUC__ || __STDC_VERSION__ >= 199901L) |
# undef _NO_LONGLONG |
#endif |
|
#define _NO_POS_ARGS |
#ifdef _WANT_IO_POS_ARGS |
# undef _NO_POS_ARGS |
# ifdef NL_ARGMAX |
# define MAX_POS_ARGS NL_ARGMAX |
# else |
# define MAX_POS_ARGS 32 |
# endif |
|
static void * get_arg (int, va_list *, int *, void **); |
#endif /* _WANT_IO_POS_ARGS */ |
|
/* |
* Flags used during conversion. |
*/ |
|
#define LONG 0x01 /* l: long or double */ |
#define LONGDBL 0x02 /* L/ll: long double or long long */ |
#define SHORT 0x04 /* h: short */ |
#define CHAR 0x08 /* hh: 8 bit integer */ |
#define SUPPRESS 0x10 /* suppress assignment */ |
#define POINTER 0x20 /* weird %p pointer (`fake hex') */ |
#define NOSKIP 0x40 /* do not skip blanks */ |
|
/* |
* The following are used in numeric conversions only: |
* SIGNOK, NDIGITS, DPTOK, and EXPOK are for floating point; |
* SIGNOK, NDIGITS, PFXOK, and NZDIGITS are for integral. |
*/ |
|
#define SIGNOK 0x80 /* +/- is (still) legal */ |
#define NDIGITS 0x100 /* no digits detected */ |
|
#define DPTOK 0x200 /* (float) decimal point is still legal */ |
#define EXPOK 0x400 /* (float) exponent (e+3, etc) still legal */ |
|
#define PFXOK 0x200 /* 0x prefix is (still) legal */ |
#define NZDIGITS 0x400 /* no zero digits detected */ |
#define HAVESIGN 0x10000 /* sign detected */ |
|
/* |
* Conversion types. |
*/ |
|
#define CT_CHAR 0 /* %c conversion */ |
#define CT_CCL 1 /* %[...] conversion */ |
#define CT_STRING 2 /* %s conversion */ |
#define CT_INT 3 /* integer, i.e., wcstol or wcstoul */ |
#define CT_FLOAT 4 /* floating, i.e., wcstod */ |
|
#define INCCL(_c) \ |
(cclcompl ? (wmemchr(ccls, (_c), ccle - ccls) == NULL) : \ |
(wmemchr(ccls, (_c), ccle - ccls) != NULL)) |
|
/* |
* vfwscanf |
*/ |
|
#ifndef STRING_ONLY |
|
#ifndef _REENT_ONLY |
|
int |
_DEFUN(VFWSCANF, (fp, fmt, ap), |
register FILE *__restrict fp _AND |
_CONST wchar_t *__restrict fmt _AND |
va_list ap) |
{ |
struct _reent *reent = _REENT; |
|
CHECK_INIT(reent, fp); |
return __SVFWSCANF_R (reent, fp, fmt, ap); |
} |
|
int |
_DEFUN(__SVFWSCANF, (fp, fmt0, ap), |
register FILE *fp _AND |
wchar_t _CONST *fmt0 _AND |
va_list ap) |
{ |
return __SVFWSCANF_R (_REENT, fp, fmt0, ap); |
} |
|
#endif /* !_REENT_ONLY */ |
|
int |
_DEFUN(_VFWSCANF_R, (data, fp, fmt, ap), |
struct _reent *data _AND |
register FILE *fp _AND |
_CONST wchar_t *fmt _AND |
va_list ap) |
{ |
CHECK_INIT(data, fp); |
return __SVFWSCANF_R (data, fp, fmt, ap); |
} |
#endif /* !STRING_ONLY */ |
|
#ifdef STRING_ONLY |
/* When dealing with the swscanf family, we don't want to use the |
* regular ungetwc which will drag in file I/O items we don't need. |
* So, we create our own trimmed-down version. */ |
static wint_t |
_DEFUN(_sungetwc_r, (data, fp, ch), |
struct _reent *data _AND |
wint_t wc _AND |
register FILE *fp) |
{ |
if (wc == WEOF) |
return (WEOF); |
|
/* After ungetc, we won't be at eof anymore */ |
fp->_flags &= ~__SEOF; |
|
/* |
* If we are in the middle of ungetwc'ing, just continue. |
* This may require expanding the current ungetc buffer. |
*/ |
|
if (HASUB (fp)) |
{ |
if (fp->_r >= fp->_ub._size && __submore (data, fp)) |
{ |
return EOF; |
} |
fp->_p -= sizeof (wchar_t); |
*fp->_p = (wchar_t) wc; |
fp->_r += sizeof (wchar_t); |
return wc; |
} |
|
/* |
* If we can handle this by simply backing up, do so, |
* but never replace the original character. |
* (This makes swscanf() work when scanning `const' data.) |
*/ |
|
if (fp->_bf._base != NULL && fp->_p > fp->_bf._base |
&& ((wchar_t *)fp->_p)[-1] == wc) |
{ |
fp->_p -= sizeof (wchar_t); |
fp->_r += sizeof (wchar_t); |
return wc; |
} |
|
/* |
* Create an ungetc buffer. |
* Initially, we will use the `reserve' buffer. |
*/ |
|
fp->_ur = fp->_r; |
fp->_up = fp->_p; |
fp->_ub._base = fp->_ubuf; |
fp->_ub._size = sizeof (fp->_ubuf); |
fp->_p = &fp->_ubuf[sizeof (fp->_ubuf) - sizeof (wchar_t)]; |
*(wchar_t *) fp->_p = wc; |
fp->_r = 2; |
return wc; |
} |
|
extern int __ssrefill_r _PARAMS ((struct _reent *ptr, register FILE * fp)); |
|
static size_t |
_DEFUN(_sfgetwc_r, (ptr, fp), |
struct _reent * ptr _AND |
FILE * fp) |
{ |
wchar_t wc; |
|
if (fp->_r <= 0 && __ssrefill_r (ptr, fp)) |
return (WEOF); |
wc = *(wchar_t *) fp->_p; |
fp->_p += sizeof (wchar_t); |
fp->_r -= sizeof (wchar_t); |
return (wc); |
} |
#endif /* STRING_ONLY */ |
|
int |
_DEFUN(__SVFWSCANF_R, (rptr, fp, fmt0, ap), |
struct _reent *rptr _AND |
register FILE *fp _AND |
wchar_t _CONST *fmt0 _AND |
va_list ap) |
{ |
register wchar_t *fmt = (wchar_t *) fmt0; |
register wint_t c; /* character from format, or conversion */ |
register size_t width; /* field width, or 0 */ |
register wchar_t *p = NULL; /* points into all kinds of strings */ |
register int n; /* handy integer */ |
register int flags; /* flags as defined above */ |
register wchar_t *p0; /* saves original value of p when necessary */ |
int nassigned; /* number of fields assigned */ |
int nread; /* number of characters consumed from fp */ |
#ifndef _NO_POS_ARGS |
int N; /* arg number */ |
int arg_index = 0; /* index into args processed directly */ |
int numargs = 0; /* number of varargs read */ |
void *args[MAX_POS_ARGS]; /* positional args read */ |
int is_pos_arg; /* is current format positional? */ |
#endif |
int base = 0; /* base argument to wcstol/wcstoul */ |
|
mbstate_t mbs; /* value to keep track of multibyte state */ |
|
#define CCFN_PARAMS _PARAMS((struct _reent *, const wchar_t *, wchar_t **, int)) |
unsigned long (*ccfn)CCFN_PARAMS=0; /* conversion function (wcstol/wcstoul) */ |
wchar_t buf[BUF]; /* buffer for numeric conversions */ |
const wchar_t *ccls; /* character class start */ |
const wchar_t *ccle; /* character class end */ |
int cclcompl = 0; /* ccl is complemented? */ |
wint_t wi; /* handy wint_t */ |
char *mbp = NULL; /* multibyte string pointer for %c %s %[ */ |
size_t nconv; /* number of bytes in mb. conversion */ |
char mbbuf[MB_LEN_MAX]; /* temporary mb. character buffer */ |
|
char *cp; |
short *sp; |
int *ip; |
#ifdef FLOATING_POINT |
float *flp; |
_LONG_DOUBLE *ldp; |
double *dp; |
wchar_t decpt; |
#endif |
long *lp; |
#ifndef _NO_LONGLONG |
long long *llp; |
#endif |
|
/* `basefix' is used to avoid `if' tests in the integer scanner */ |
static _CONST short basefix[17] = |
{10, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16}; |
|
/* Macro to support positional arguments */ |
#ifndef _NO_POS_ARGS |
# define GET_ARG(n, ap, type) \ |
((type) (is_pos_arg \ |
? (n < numargs \ |
? args[n] \ |
: get_arg (n, &ap, &numargs, args)) \ |
: (arg_index++ < numargs \ |
? args[n] \ |
: (numargs < MAX_POS_ARGS \ |
? args[numargs++] = va_arg (ap, void *) \ |
: va_arg (ap, void *))))) |
#else |
# define GET_ARG(n, ap, type) (va_arg (ap, type)) |
#endif |
|
#ifdef FLOATING_POINT |
#ifdef _MB_CAPABLE |
#ifdef __HAVE_LOCALE_INFO_EXTENDED__ |
decpt = *__get_current_numeric_locale ()->wdecimal_point; |
#else |
{ |
size_t nconv; |
|
memset (&mbs, '\0', sizeof (mbs)); |
nconv = _mbrtowc_r (rptr, &decpt, |
_localeconv_r (rptr)->decimal_point, |
MB_CUR_MAX, &mbs); |
if (nconv == (size_t) -1 || nconv == (size_t) -2) |
decpt = L'.'; |
} |
#endif /* !__HAVE_LOCALE_INFO_EXTENDED__ */ |
#else |
decpt = (wchar_t) *_localeconv_r (rptr)->decimal_point; |
#endif /* !_MB_CAPABLE */ |
#endif /* FLOATING_POINT */ |
|
_newlib_flockfile_start (fp); |
|
ORIENT (fp, 1); |
|
nassigned = 0; |
nread = 0; |
ccls = ccle = NULL; |
for (;;) |
{ |
c = *fmt++; |
if (c == L'\0') |
goto all_done; |
if (iswspace (c)) |
{ |
while ((c = _fgetwc_r (rptr, fp)) != WEOF && iswspace(c)) |
; |
if (c != WEOF) |
_ungetwc_r (rptr, c, fp); |
continue; |
} |
if (c != L'%') |
goto literal; |
width = 0; |
flags = 0; |
#ifndef _NO_POS_ARGS |
N = arg_index; |
is_pos_arg = 0; |
#endif |
|
/* |
* switch on the format. continue if done; break once format |
* type is derived. |
*/ |
|
again: |
c = *fmt++; |
|
switch (c) |
{ |
case L'%': |
literal: |
if ((wi = _fgetwc_r (rptr, fp)) == WEOF) |
goto input_failure; |
if (wi != c) |
{ |
_ungetwc_r (rptr, wi, fp); |
goto input_failure; |
} |
nread++; |
continue; |
|
case L'*': |
flags |= SUPPRESS; |
goto again; |
case L'l': |
#if defined _WANT_IO_C99_FORMATS || !defined _NO_LONGLONG |
if (*fmt == L'l') /* Check for 'll' = long long (SUSv3) */ |
{ |
++fmt; |
flags |= LONGDBL; |
} |
else |
#endif |
flags |= LONG; |
goto again; |
case L'L': |
flags |= LONGDBL; |
goto again; |
case L'h': |
#ifdef _WANT_IO_C99_FORMATS |
if (*fmt == 'h') /* Check for 'hh' = char int (SUSv3) */ |
{ |
++fmt; |
flags |= CHAR; |
} |
else |
#endif |
flags |= SHORT; |
goto again; |
#ifdef _WANT_IO_C99_FORMATS |
case L'j': /* intmax_t */ |
if (sizeof (intmax_t) == sizeof (long)) |
flags |= LONG; |
else |
flags |= LONGDBL; |
goto again; |
case L't': /* ptrdiff_t */ |
if (sizeof (ptrdiff_t) < sizeof (int)) |
/* POSIX states ptrdiff_t is 16 or more bits, as |
is short. */ |
flags |= SHORT; |
else if (sizeof (ptrdiff_t) == sizeof (int)) |
/* no flag needed */; |
else if (sizeof (ptrdiff_t) <= sizeof (long)) |
flags |= LONG; |
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 |= LONGDBL; |
goto again; |
case L'z': /* size_t */ |
if (sizeof (size_t) < sizeof (int)) |
/* POSIX states size_t is 16 or more bits, as is short. */ |
flags |= SHORT; |
else if (sizeof (size_t) == sizeof (int)) |
/* no flag needed */; |
else if (sizeof (size_t) <= sizeof (long)) |
flags |= LONG; |
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 |= LONGDBL; |
goto again; |
#endif /* _WANT_IO_C99_FORMATS */ |
|
case L'0': |
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': |
width = width * 10 + c - L'0'; |
goto again; |
|
#ifndef _NO_POS_ARGS |
case L'$': |
if (width <= MAX_POS_ARGS) |
{ |
N = width - 1; |
is_pos_arg = 1; |
width = 0; |
goto again; |
} |
rptr->_errno = EINVAL; |
goto input_failure; |
#endif /* !_NO_POS_ARGS */ |
|
case L'd': |
c = CT_INT; |
ccfn = (unsigned long (*)CCFN_PARAMS)_wcstol_r; |
base = 10; |
break; |
|
case L'i': |
c = CT_INT; |
ccfn = (unsigned long (*)CCFN_PARAMS)_wcstol_r; |
base = 0; |
break; |
|
case L'o': |
c = CT_INT; |
ccfn = _wcstoul_r; |
base = 8; |
break; |
|
case L'u': |
c = CT_INT; |
ccfn = _wcstoul_r; |
base = 10; |
break; |
|
case L'X': |
case L'x': |
flags |= PFXOK; /* enable 0x prefixing */ |
c = CT_INT; |
ccfn = _wcstoul_r; |
base = 16; |
break; |
|
#ifdef FLOATING_POINT |
# ifdef _WANT_IO_C99_FORMATS |
case L'A': |
case L'a': |
case L'F': |
# endif |
case L'E': |
case L'G': |
case L'e': |
case L'f': |
case L'g': |
c = CT_FLOAT; |
break; |
#endif |
|
#ifdef _WANT_IO_C99_FORMATS |
case L'S': |
flags |= LONG; |
/* FALLTHROUGH */ |
#endif |
|
case L's': |
c = CT_STRING; |
break; |
|
case L'[': |
ccls = fmt; |
if (*fmt == '^') |
{ |
cclcompl = 1; |
++fmt; |
} |
else |
cclcompl = 0; |
if (*fmt == ']') |
fmt++; |
while (*fmt != '\0' && *fmt != ']') |
fmt++; |
ccle = fmt; |
fmt++; |
flags |= NOSKIP; |
c = CT_CCL; |
break; |
|
#ifdef _WANT_IO_C99_FORMATS |
case 'C': |
flags |= LONG; |
/* FALLTHROUGH */ |
#endif |
|
case 'c': |
flags |= NOSKIP; |
c = CT_CHAR; |
break; |
|
case 'p': /* pointer format is like hex */ |
flags |= POINTER | PFXOK; |
c = CT_INT; |
ccfn = _wcstoul_r; |
base = 16; |
break; |
|
case 'n': |
if (flags & SUPPRESS) /* ??? */ |
continue; |
#ifdef _WANT_IO_C99_FORMATS |
if (flags & CHAR) |
{ |
cp = GET_ARG (N, ap, char *); |
*cp = nread; |
} |
else |
#endif |
if (flags & SHORT) |
{ |
sp = GET_ARG (N, ap, short *); |
*sp = nread; |
} |
else if (flags & LONG) |
{ |
lp = GET_ARG (N, ap, long *); |
*lp = nread; |
} |
#ifndef _NO_LONGLONG |
else if (flags & LONGDBL) |
{ |
llp = GET_ARG (N, ap, long long*); |
*llp = nread; |
} |
#endif |
else |
{ |
ip = GET_ARG (N, ap, int *); |
*ip = nread; |
} |
continue; |
|
/* |
* Disgusting backwards compatibility hacks. XXX |
*/ |
case L'\0': /* compat */ |
_newlib_flockfile_exit (fp); |
return EOF; |
|
default: /* compat */ |
goto match_failure; |
} |
|
/* |
* Consume leading white space, except for formats that |
* suppress this. |
*/ |
if ((flags & NOSKIP) == 0) |
{ |
while ((wi = _fgetwc_r (rptr, fp)) != WEOF && iswspace (wi)) |
nread++; |
if (wi == WEOF) |
goto input_failure; |
_ungetwc_r (rptr, wi, fp); |
} |
|
/* |
* Do the conversion. |
*/ |
switch (c) |
{ |
|
case CT_CHAR: |
/* scan arbitrary characters (sets NOSKIP) */ |
if (width == 0) |
width = 1; |
if (flags & LONG) |
{ |
if (!(flags & SUPPRESS)) |
p = GET_ARG(N, ap, wchar_t *); |
n = 0; |
while (width-- != 0 && (wi = _fgetwc_r (rptr, fp)) != WEOF) |
{ |
if (!(flags & SUPPRESS)) |
*p++ = (wchar_t) wi; |
n++; |
} |
if (n == 0) |
goto input_failure; |
nread += n; |
if (!(flags & SUPPRESS)) |
nassigned++; |
} |
else |
{ |
if (!(flags & SUPPRESS)) |
mbp = GET_ARG(N, ap, char *); |
n = 0; |
memset ((_PTR)&mbs, '\0', sizeof (mbstate_t)); |
while (width != 0 && (wi = _fgetwc_r (rptr, fp)) != WEOF) |
{ |
if (width >= MB_CUR_MAX && !(flags & SUPPRESS)) |
{ |
nconv = _wcrtomb_r (rptr, mbp, wi, &mbs); |
if (nconv == (size_t) -1) |
goto input_failure; |
} |
else |
{ |
nconv = _wcrtomb_r (rptr, mbbuf, wi, &mbs); |
if (nconv == (size_t) -1) |
goto input_failure; |
if (nconv > width) |
{ |
_ungetwc_r (rptr, wi, fp); |
break; |
} |
if (!(flags & SUPPRESS)) |
memcpy(mbp, mbbuf, nconv); |
} |
if (!(flags & SUPPRESS)) |
mbp += nconv; |
width -= nconv; |
n++; |
} |
if (n == 0) |
goto input_failure; |
nread += n; |
if (!(flags & SUPPRESS)) |
nassigned++; |
} |
break; |
|
case CT_CCL: |
/* scan a (nonempty) character class (sets NOSKIP) */ |
if (width == 0) |
width = (size_t) ~0; /* `infinity' */ |
/* take only those things in the class */ |
if ((flags & SUPPRESS) && (flags & LONG)) |
{ |
n = 0; |
while ((wi = _fgetwc_r (rptr, fp)) != WEOF |
&& width-- != 0 && INCCL (wi)) |
n++; |
if (wi != WEOF) |
_ungetwc_r (rptr, wi, fp); |
if (n == 0) |
goto match_failure; |
} |
else if (flags & LONG) |
{ |
p0 = p = GET_ARG(N, ap, wchar_t *); |
while ((wi = _fgetwc_r (rptr, fp)) != WEOF |
&& width-- != 0 && INCCL (wi)) |
*p++ = (wchar_t) wi; |
if (wi != WEOF) |
_ungetwc_r (rptr, wi, fp); |
n = p - p0; |
if (n == 0) |
goto match_failure; |
*p = L'\0'; |
nassigned++; |
} |
else |
{ |
if (!(flags & SUPPRESS)) |
mbp = GET_ARG(N, ap, char *); |
n = 0; |
memset ((_PTR) &mbs, '\0', sizeof (mbstate_t)); |
while ((wi = _fgetwc_r (rptr, fp)) != WEOF |
&& width-- != 0 && INCCL (wi)) |
{ |
if (width >= MB_CUR_MAX && !(flags & SUPPRESS)) |
{ |
nconv = _wcrtomb_r (rptr, mbp, wi, &mbs); |
if (nconv == (size_t) -1) |
goto input_failure; |
} |
else |
{ |
nconv = wcrtomb(mbbuf, wi, &mbs); |
if (nconv == (size_t) -1) |
goto input_failure; |
if (nconv > width) |
break; |
if (!(flags & SUPPRESS)) |
memcpy(mbp, mbbuf, nconv); |
} |
if (!(flags & SUPPRESS)) |
mbp += nconv; |
width -= nconv; |
n++; |
} |
if (wi != WEOF) |
_ungetwc_r (rptr, wi, fp); |
if (!(flags & SUPPRESS)) |
{ |
*mbp = 0; |
nassigned++; |
} |
} |
nread += n; |
break; |
|
case CT_STRING: |
/* like CCL, but zero-length string OK, & no NOSKIP */ |
if (width == 0) |
width = (size_t)~0; |
if ((flags & SUPPRESS) && (flags & LONG)) |
{ |
while ((wi = _fgetwc_r (rptr, fp)) != WEOF |
&& width-- != 0 && !iswspace (wi)) |
nread++; |
if (wi != WEOF) |
_ungetwc_r (rptr, wi, fp); |
} |
else if (flags & LONG) |
{ |
p0 = p = GET_ARG(N, ap, wchar_t *); |
while ((wi = _fgetwc_r (rptr, fp)) != WEOF |
&& width-- != 0 && !iswspace (wi)) |
{ |
*p++ = (wchar_t) wi; |
nread++; |
} |
if (wi != WEOF) |
_ungetwc_r (rptr, wi, fp); |
*p = L'\0'; |
nassigned++; |
} |
else |
{ |
if (!(flags & SUPPRESS)) |
mbp = GET_ARG(N, ap, char *); |
memset ((_PTR) &mbs, '\0', sizeof (mbstate_t)); |
while ((wi = _fgetwc_r (rptr, fp)) != WEOF |
&& width != 0 && !iswspace (wi)) |
{ |
if (width >= MB_CUR_MAX && !(flags & SUPPRESS)) |
{ |
nconv = wcrtomb(mbp, wi, &mbs); |
if (nconv == (size_t)-1) |
goto input_failure; |
} |
else |
{ |
nconv = wcrtomb(mbbuf, wi, &mbs); |
if (nconv == (size_t)-1) |
goto input_failure; |
if (nconv > width) |
break; |
if (!(flags & SUPPRESS)) |
memcpy(mbp, mbbuf, nconv); |
} |
if (!(flags & SUPPRESS)) |
mbp += nconv; |
width -= nconv; |
nread++; |
} |
if (wi != WEOF) |
_ungetwc_r (rptr, wi, fp); |
if (!(flags & SUPPRESS)) |
{ |
*mbp = 0; |
nassigned++; |
} |
} |
continue; |
|
case CT_INT: |
{ |
/* scan an integer as if by wcstol/wcstoul */ |
if (width == 0 || width > sizeof (buf) / sizeof (*buf) - 1) |
width = sizeof(buf) / sizeof (*buf) - 1; |
flags |= SIGNOK | NDIGITS | NZDIGITS; |
for (p = buf; width; width--) |
{ |
c = _fgetwc_r (rptr, fp); |
/* |
* Switch on the character; `goto ok' if we |
* accept it as a part of number. |
*/ |
switch (c) |
{ |
/* |
* The digit 0 is always legal, but is special. |
* For %i conversions, if no digits (zero or nonzero) |
* have been scanned (only signs), we will have base==0. |
* In that case, we should set it to 8 and enable 0x |
* prefixing. Also, if we have not scanned zero digits |
* before this, do not turn off prefixing (someone else |
* will turn it off if we have scanned any nonzero digits). |
*/ |
case L'0': |
if (base == 0) |
{ |
base = 8; |
flags |= PFXOK; |
} |
if (flags & NZDIGITS) |
flags &= ~(SIGNOK | NZDIGITS | NDIGITS); |
else |
flags &= ~(SIGNOK | PFXOK | NDIGITS); |
goto ok; |
|
/* 1 through 7 always legal */ |
case L'1': |
case L'2': |
case L'3': |
case L'4': |
case L'5': |
case L'6': |
case L'7': |
base = basefix[base]; |
flags &= ~(SIGNOK | PFXOK | NDIGITS); |
goto ok; |
|
/* digits 8 and 9 ok iff decimal or hex */ |
case L'8': |
case L'9': |
base = basefix[base]; |
if (base <= 8) |
break; /* not legal here */ |
flags &= ~(SIGNOK | PFXOK | NDIGITS); |
goto ok; |
|
/* letters ok iff hex */ |
case L'A': |
case L'B': |
case L'C': |
case L'D': |
case L'E': |
case L'F': |
case L'a': |
case L'b': |
case L'c': |
case L'd': |
case L'e': |
case L'f': |
/* no need to fix base here */ |
if (base <= 10) |
break; /* not legal here */ |
flags &= ~(SIGNOK | PFXOK | NDIGITS); |
goto ok; |
|
/* sign ok only as first character */ |
case L'+': |
case L'-': |
if (flags & SIGNOK) |
{ |
flags &= ~SIGNOK; |
flags |= HAVESIGN; |
goto ok; |
} |
break; |
|
/* x ok iff flag still set & single 0 seen */ |
case L'x': |
case L'X': |
if ((flags & PFXOK) && p == buf + 1 + !!(flags & HAVESIGN)) |
{ |
base = 16;/* if %i */ |
flags &= ~PFXOK; |
goto ok; |
} |
break; |
} |
|
/* |
* If we got here, c is not a legal character |
* for a number. Stop accumulating digits. |
*/ |
if (c != WEOF) |
_ungetwc_r (rptr, c, fp); |
break; |
ok: |
/* |
* c is legal: store it and look at the next. |
*/ |
*p++ = (wchar_t) c; |
} |
/* |
* If we had only a sign, it is no good; push back the sign. |
* If the number ends in `x', it was [sign] '0' 'x', so push back |
* the x and treat it as [sign] '0'. |
* Use of ungetc here and below assumes ASCII encoding; we are only |
* pushing back 7-bit characters, so casting to unsigned char is |
* not necessary. |
*/ |
if (flags & NDIGITS) |
{ |
if (p > buf) |
_ungetwc_r (rptr, *--p, fp); /* [-+xX] */ |
goto match_failure; |
} |
c = p[-1]; |
if (c == L'x' || c == L'X') |
{ |
--p; |
_ungetwc_r (rptr, c, fp); |
} |
if ((flags & SUPPRESS) == 0) |
{ |
unsigned long res; |
|
*p = 0; |
res = (*ccfn) (rptr, buf, (wchar_t **) NULL, base); |
if (flags & POINTER) |
{ |
void **vp = GET_ARG (N, ap, void **); |
#ifndef _NO_LONGLONG |
if (sizeof (uintptr_t) > sizeof (unsigned long)) |
{ |
unsigned long long resll; |
resll = _wcstoull_r (rptr, buf, (wchar_t **) NULL, base); |
*vp = (void *) (uintptr_t) resll; |
} |
else |
#endif /* !_NO_LONGLONG */ |
*vp = (void *) (uintptr_t) res; |
} |
#ifdef _WANT_IO_C99_FORMATS |
else if (flags & CHAR) |
{ |
cp = GET_ARG (N, ap, char *); |
*cp = res; |
} |
#endif |
else if (flags & SHORT) |
{ |
sp = GET_ARG (N, ap, short *); |
*sp = res; |
} |
else if (flags & LONG) |
{ |
lp = GET_ARG (N, ap, long *); |
*lp = res; |
} |
#ifndef _NO_LONGLONG |
else if (flags & LONGDBL) |
{ |
unsigned long long resll; |
if (ccfn == _wcstoul_r) |
resll = _wcstoull_r (rptr, buf, (wchar_t **) NULL, base); |
else |
resll = _wcstoll_r (rptr, buf, (wchar_t **) NULL, base); |
llp = GET_ARG (N, ap, long long*); |
*llp = resll; |
} |
#endif |
else |
{ |
ip = GET_ARG (N, ap, int *); |
*ip = res; |
} |
nassigned++; |
} |
nread += p - buf; |
break; |
} |
#ifdef FLOATING_POINT |
case CT_FLOAT: |
{ |
/* scan a floating point number as if by wcstod */ |
/* This code used to assume that the number of digits is reasonable. |
However, ANSI / ISO C makes no such stipulation; we have to get |
exact results even when there is an unreasonable amount of |
leading zeroes. */ |
long leading_zeroes = 0; |
long zeroes, exp_adjust; |
wchar_t *exp_start = NULL; |
unsigned width_left = 0; |
char nancount = 0; |
char infcount = 0; |
#ifdef hardway |
if (width == 0 || width > sizeof (buf) - 1) |
#else |
/* size_t is unsigned, hence this optimisation */ |
if (width - 1 > sizeof (buf) - 2) |
#endif |
{ |
width_left = width - (sizeof (buf) - 1); |
width = sizeof (buf) - 1; |
} |
flags |= SIGNOK | NDIGITS | DPTOK | EXPOK; |
zeroes = 0; |
exp_adjust = 0; |
for (p = buf; width; ) |
{ |
c = _fgetwc_r (rptr, fp); |
/* |
* This code mimicks the integer conversion |
* code, but is much simpler. |
*/ |
switch (c) |
{ |
case L'0': |
if (flags & NDIGITS) |
{ |
flags &= ~SIGNOK; |
zeroes++; |
if (width_left) |
{ |
width_left--; |
width++; |
} |
goto fskip; |
} |
/* Fall through. */ |
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': |
if (nancount + infcount == 0) |
{ |
flags &= ~(SIGNOK | NDIGITS); |
goto fok; |
} |
break; |
|
case L'+': |
case L'-': |
if (flags & SIGNOK) |
{ |
flags &= ~SIGNOK; |
goto fok; |
} |
break; |
case L'n': |
case L'N': |
if (nancount == 0 && zeroes == 0 |
&& (flags & (NDIGITS | DPTOK | EXPOK)) == |
(NDIGITS | DPTOK | EXPOK)) |
{ |
flags &= ~(SIGNOK | DPTOK | EXPOK | NDIGITS); |
nancount = 1; |
goto fok; |
} |
if (nancount == 2) |
{ |
nancount = 3; |
goto fok; |
} |
if (infcount == 1 || infcount == 4) |
{ |
infcount++; |
goto fok; |
} |
break; |
case L'a': |
case L'A': |
if (nancount == 1) |
{ |
nancount = 2; |
goto fok; |
} |
break; |
case L'i': |
if (infcount == 0 && zeroes == 0 |
&& (flags & (NDIGITS | DPTOK | EXPOK)) == |
(NDIGITS | DPTOK | EXPOK)) |
{ |
flags &= ~(SIGNOK | DPTOK | EXPOK | NDIGITS); |
infcount = 1; |
goto fok; |
} |
if (infcount == 3 || infcount == 5) |
{ |
infcount++; |
goto fok; |
} |
break; |
case L'f': |
case L'F': |
if (infcount == 2) |
{ |
infcount = 3; |
goto fok; |
} |
break; |
case L't': |
case L'T': |
if (infcount == 6) |
{ |
infcount = 7; |
goto fok; |
} |
break; |
case L'y': |
case L'Y': |
if (infcount == 7) |
{ |
infcount = 8; |
goto fok; |
} |
break; |
case L'e': |
case L'E': |
/* no exponent without some digits */ |
if ((flags & (NDIGITS | EXPOK)) == EXPOK |
|| ((flags & EXPOK) && zeroes)) |
{ |
if (! (flags & DPTOK)) |
{ |
exp_adjust = zeroes - leading_zeroes; |
exp_start = p; |
} |
flags = |
(flags & ~(EXPOK | DPTOK)) | |
SIGNOK | NDIGITS; |
zeroes = 0; |
goto fok; |
} |
break; |
default: |
if ((wchar_t) c == decpt && (flags & DPTOK)) |
{ |
flags &= ~(SIGNOK | DPTOK); |
leading_zeroes = zeroes; |
goto fok; |
} |
break; |
} |
if (c != WEOF) |
_ungetwc_r (rptr, c, fp); |
break; |
fok: |
*p++ = c; |
fskip: |
width--; |
++nread; |
} |
if (zeroes) |
flags &= ~NDIGITS; |
/* We may have a 'N' or possibly even [sign] 'N' 'a' as the |
start of 'NaN', only to run out of chars before it was |
complete (or having encountered a non-matching char). So |
check here if we have an outstanding nancount, and if so |
put back the chars we did swallow and treat as a failed |
match. |
|
FIXME - we still don't handle NAN([0xdigits]). */ |
if (nancount - 1U < 2U) /* nancount && nancount < 3 */ |
{ |
/* Newlib's ungetc works even if we called __srefill in |
the middle of a partial parse, but POSIX does not |
guarantee that in all implementations of ungetc. */ |
while (p > buf) |
{ |
_ungetwc_r (rptr, *--p, fp); /* [-+nNaA] */ |
--nread; |
} |
goto match_failure; |
} |
/* Likewise for 'inf' and 'infinity'. But be careful that |
'infinite' consumes only 3 characters, leaving the stream |
at the second 'i'. */ |
if (infcount - 1U < 7U) /* infcount && infcount < 8 */ |
{ |
if (infcount >= 3) /* valid 'inf', but short of 'infinity' */ |
while (infcount-- > 3) |
{ |
_ungetwc_r (rptr, *--p, fp); /* [iInNtT] */ |
--nread; |
} |
else |
{ |
while (p > buf) |
{ |
_ungetwc_r (rptr, *--p, fp); /* [-+iInN] */ |
--nread; |
} |
goto match_failure; |
} |
} |
/* |
* If no digits, might be missing exponent digits |
* (just give back the exponent) or might be missing |
* regular digits, but had sign and/or decimal point. |
*/ |
if (flags & NDIGITS) |
{ |
if (flags & EXPOK) |
{ |
/* no digits at all */ |
while (p > buf) |
{ |
_ungetwc_r (rptr, *--p, fp); /* [-+.] */ |
--nread; |
} |
goto match_failure; |
} |
/* just a bad exponent (e and maybe sign) */ |
c = *--p; |
--nread; |
if (c != L'e' && c != L'E') |
{ |
_ungetwc_r (rptr, c, fp); /* [-+] */ |
c = *--p; |
--nread; |
} |
_ungetwc_r (rptr, c, fp); /* [eE] */ |
} |
if ((flags & SUPPRESS) == 0) |
{ |
double res = 0; |
#ifdef _NO_LONGDBL |
#define QUAD_RES res; |
#else /* !_NO_LONG_DBL */ |
long double qres = 0; |
#define QUAD_RES qres; |
#endif /* !_NO_LONG_DBL */ |
long new_exp = 0; |
|
*p = 0; |
if ((flags & (DPTOK | EXPOK)) == EXPOK) |
{ |
exp_adjust = zeroes - leading_zeroes; |
new_exp = -exp_adjust; |
exp_start = p; |
} |
else if (exp_adjust) |
new_exp = _wcstol_r (rptr, (exp_start + 1), NULL, 10) - exp_adjust; |
if (exp_adjust) |
{ |
|
/* If there might not be enough space for the new exponent, |
truncate some trailing digits to make room. */ |
if (exp_start >= buf + sizeof (buf) - MAX_LONG_LEN) |
exp_start = buf + sizeof (buf) - MAX_LONG_LEN - 1; |
swprintf (exp_start, MAX_LONG_LEN, L"e%ld", new_exp); |
} |
|
/* FIXME: We don't have wcstold yet. */ |
#if 0//ndef _NO_LONGDBL /* !_NO_LONGDBL */ |
if (flags & LONGDBL) |
qres = _wcstold_r (rptr, buf, NULL); |
else |
#endif |
res = _wcstod_r (rptr, buf, NULL); |
|
if (flags & LONG) |
{ |
dp = GET_ARG (N, ap, double *); |
*dp = res; |
} |
else if (flags & LONGDBL) |
{ |
ldp = GET_ARG (N, ap, _LONG_DOUBLE *); |
*ldp = QUAD_RES; |
} |
else |
{ |
flp = GET_ARG (N, ap, float *); |
if (isnan (res)) |
*flp = nanf (NULL); |
else |
*flp = res; |
} |
nassigned++; |
} |
break; |
} |
#endif /* FLOATING_POINT */ |
} |
} |
input_failure: |
/* On read failure, return EOF failure regardless of matches; errno |
should have been set prior to here. On EOF failure (including |
invalid format string), return EOF if no matches yet, else number |
of matches made prior to failure. */ |
_newlib_flockfile_exit (fp); |
return nassigned && !(fp->_flags & __SERR) ? nassigned : EOF; |
match_failure: |
all_done: |
/* Return number of matches, which can be 0 on match failure. */ |
_newlib_flockfile_end (fp); |
return nassigned; |
} |
|
#ifndef _NO_POS_ARGS |
/* Process all intermediate arguments. Fortunately, with wscanf, all |
intermediate arguments are sizeof(void*), so we don't need to scan |
ahead in the format string. */ |
static void * |
get_arg (int n, va_list *ap, int *numargs_p, void **args) |
{ |
int numargs = *numargs_p; |
while (n >= numargs) |
args[numargs++] = va_arg (*ap, void *); |
*numargs_p = numargs; |
return args[n]; |
} |
#endif /* !_NO_POS_ARGS */ |