1622 lines
37 KiB
C
1622 lines
37 KiB
C
/*-
|
|
* 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
|
|
<<vfscanf>>, <<vscanf>>, <<vsscanf>>---format argument list
|
|
|
|
INDEX
|
|
vfscanf
|
|
INDEX
|
|
_vfscanf_r
|
|
INDEX
|
|
vscanf
|
|
INDEX
|
|
_vscanf_r
|
|
INDEX
|
|
vsscanf
|
|
INDEX
|
|
_vsscanf_r
|
|
|
|
ANSI_SYNOPSIS
|
|
#include <stdio.h>
|
|
#include <stdarg.h>
|
|
int vscanf(const char *<[fmt]>, va_list <[list]>);
|
|
int vfscanf(FILE *<[fp]>, const char *<[fmt]>, va_list <[list]>);
|
|
int vsscanf(const char *<[str]>, const char *<[fmt]>, va_list <[list]>);
|
|
|
|
int _vscanf_r(struct _reent *<[reent]>, const char *<[fmt]>,
|
|
va_list <[list]>);
|
|
int _vfscanf_r(struct _reent *<[reent]>, FILE *<[fp]>, const char *<[fmt]>,
|
|
va_list <[list]>);
|
|
int _vsscanf_r(struct _reent *<[reent]>, const char *<[str]>,
|
|
const char *<[fmt]>, va_list <[list]>);
|
|
|
|
TRAD_SYNOPSIS
|
|
#include <stdio.h>
|
|
#include <varargs.h>
|
|
int vscanf( <[fmt]>, <[ist]>)
|
|
char *<[fmt]>;
|
|
va_list <[list]>;
|
|
|
|
int vfscanf( <[fp]>, <[fmt]>, <[list]>)
|
|
FILE *<[fp]>;
|
|
char *<[fmt]>;
|
|
va_list <[list]>;
|
|
|
|
int vsscanf( <[str]>, <[fmt]>, <[list]>)
|
|
char *<[str]>;
|
|
char *<[fmt]>;
|
|
va_list <[list]>;
|
|
|
|
int _vscanf_r( <[reent]>, <[fmt]>, <[ist]>)
|
|
struct _reent *<[reent]>;
|
|
char *<[fmt]>;
|
|
va_list <[list]>;
|
|
|
|
int _vfscanf_r( <[reent]>, <[fp]>, <[fmt]>, <[list]>)
|
|
struct _reent *<[reent]>;
|
|
FILE *<[fp]>;
|
|
char *<[fmt]>;
|
|
va_list <[list]>;
|
|
|
|
int _vsscanf_r( <[reent]>, <[str]>, <[fmt]>, <[list]>)
|
|
struct _reent *<[reent]>;
|
|
char *<[str]>;
|
|
char *<[fmt]>;
|
|
va_list <[list]>;
|
|
|
|
DESCRIPTION
|
|
<<vscanf>>, <<vfscanf>>, and <<vsscanf>> are (respectively) variants
|
|
of <<scanf>>, <<fscanf>>, and <<sscanf>>. 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:
|
|
<<vscanf>> returns the number of input fields successfully scanned,
|
|
converted, and stored; the return value does not include scanned
|
|
fields which were not stored.
|
|
|
|
If <<vscanf>> attempts to read at end-of-file, the return value
|
|
is <<EOF>>.
|
|
|
|
If no fields were stored, the return value is <<0>>.
|
|
|
|
The routines <<_vscanf_r>>, <<_vfscanf_f>>, and <<_vsscanf_r>> are
|
|
reentrant versions which take an additional first parameter which points to the
|
|
reentrancy structure.
|
|
|
|
PORTABILITY
|
|
These are GNU extensions.
|
|
|
|
Supporting OS subroutines required:
|
|
*/
|
|
|
|
#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"
|
|
#include "../stdlib/local.h"
|
|
|
|
#ifdef INTEGER_ONLY
|
|
#define VFSCANF vfiscanf
|
|
#define _VFSCANF_R _vfiscanf_r
|
|
#define __SVFSCANF __svfiscanf
|
|
#ifdef STRING_ONLY
|
|
# define __SVFSCANF_R __ssvfiscanf_r
|
|
#else
|
|
# define __SVFSCANF_R __svfiscanf_r
|
|
#endif
|
|
#else
|
|
#define VFSCANF vfscanf
|
|
#define _VFSCANF_R _vfscanf_r
|
|
#define __SVFSCANF __svfscanf
|
|
#ifdef STRING_ONLY
|
|
# define __SVFSCANF_R __ssvfscanf_r
|
|
#else
|
|
# define __SVFSCANF_R __svfscanf_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 _ungetc_r _sungetc_r
|
|
#define __srefill_r __ssrefill_r
|
|
#define _fread_r _sfread_r
|
|
#endif
|
|
|
|
#ifdef FLOATING_POINT
|
|
#include <math.h>
|
|
#include <float.h>
|
|
|
|
/* 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 _strtold _PARAMS((char *s, char **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 NNZDIGITS 0x800 /* no non-zero digits 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., strtol or strtoul */
|
|
#define CT_FLOAT 4 /* floating, i.e., strtod */
|
|
|
|
#define u_char unsigned char
|
|
#define u_long unsigned long
|
|
|
|
#ifndef _NO_LONGLONG
|
|
typedef unsigned long long u_long_long;
|
|
#endif
|
|
|
|
/*
|
|
* vfscanf
|
|
*/
|
|
|
|
#define BufferEmpty (fp->_r <= 0 && __srefill_r(rptr, fp))
|
|
|
|
#ifndef STRING_ONLY
|
|
|
|
#ifndef _REENT_ONLY
|
|
|
|
int
|
|
_DEFUN(VFSCANF, (fp, fmt, ap),
|
|
register FILE *fp _AND
|
|
_CONST char *fmt _AND
|
|
va_list ap)
|
|
{
|
|
struct _reent *reent = _REENT;
|
|
|
|
CHECK_INIT(reent, fp);
|
|
return __SVFSCANF_R (reent, fp, fmt, ap);
|
|
}
|
|
|
|
int
|
|
_DEFUN(__SVFSCANF, (fp, fmt0, ap),
|
|
register FILE *fp _AND
|
|
char _CONST *fmt0 _AND
|
|
va_list ap)
|
|
{
|
|
return __SVFSCANF_R (_REENT, fp, fmt0, ap);
|
|
}
|
|
|
|
#endif /* !_REENT_ONLY */
|
|
|
|
int
|
|
_DEFUN(_VFSCANF_R, (data, fp, fmt, ap),
|
|
struct _reent *data _AND
|
|
register FILE *fp _AND
|
|
_CONST char *fmt _AND
|
|
va_list ap)
|
|
{
|
|
CHECK_INIT(data, fp);
|
|
return __SVFSCANF_R (data, fp, fmt, ap);
|
|
}
|
|
#endif /* !STRING_ONLY */
|
|
|
|
#if defined (STRING_ONLY) && defined (INTEGER_ONLY)
|
|
/* When dealing with the sscanf family, we don't want to use the
|
|
* regular ungetc which will drag in file I/O items we don't need.
|
|
* So, we create our own trimmed-down version. */
|
|
int
|
|
_DEFUN(_sungetc_r, (data, fp, ch),
|
|
struct _reent *data _AND
|
|
int c _AND
|
|
register FILE *fp)
|
|
{
|
|
if (c == EOF)
|
|
return (EOF);
|
|
|
|
/* After ungetc, we won't be at eof anymore */
|
|
fp->_flags &= ~__SEOF;
|
|
c = (unsigned char) c;
|
|
|
|
/*
|
|
* If we are in the middle of ungetc'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 = c;
|
|
fp->_r++;
|
|
return c;
|
|
}
|
|
|
|
/*
|
|
* If we can handle this by simply backing up, do so,
|
|
* but never replace the original character.
|
|
* (This makes sscanf() work when scanning `const' data.)
|
|
*/
|
|
|
|
if (fp->_bf._base != NULL && fp->_p > fp->_bf._base && fp->_p[-1] == c)
|
|
{
|
|
fp->_p--;
|
|
fp->_r++;
|
|
return c;
|
|
}
|
|
|
|
/*
|
|
* 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->_ubuf[sizeof (fp->_ubuf) - 1] = c;
|
|
fp->_p = &fp->_ubuf[sizeof (fp->_ubuf) - 1];
|
|
fp->_r = 1;
|
|
return c;
|
|
}
|
|
|
|
/* String only version of __srefill_r for sscanf family. */
|
|
int
|
|
_DEFUN(__ssrefill_r, (ptr, fp),
|
|
struct _reent * ptr _AND
|
|
register FILE * fp)
|
|
{
|
|
/*
|
|
* Our only hope of further input is the ungetc buffer.
|
|
* If there is anything in that buffer to read, return.
|
|
*/
|
|
if (HASUB (fp))
|
|
{
|
|
FREEUB (ptr, fp);
|
|
if ((fp->_r = fp->_ur) != 0)
|
|
{
|
|
fp->_p = fp->_up;
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
/* Otherwise we are out of character input. */
|
|
fp->_p = fp->_bf._base;
|
|
fp->_r = 0;
|
|
fp->_flags |= __SEOF;
|
|
return EOF;
|
|
}
|
|
|
|
size_t
|
|
_DEFUN(_sfread_r, (ptr, buf, size, count, fp),
|
|
struct _reent * ptr _AND
|
|
_PTR buf _AND
|
|
size_t size _AND
|
|
size_t count _AND
|
|
FILE * fp)
|
|
{
|
|
register size_t resid;
|
|
register char *p;
|
|
register int r;
|
|
size_t total;
|
|
|
|
if ((resid = count * size) == 0)
|
|
return 0;
|
|
|
|
total = resid;
|
|
p = buf;
|
|
|
|
while (resid > (r = fp->_r))
|
|
{
|
|
_CAST_VOID memcpy ((_PTR) p, (_PTR) fp->_p, (size_t) r);
|
|
fp->_p += r;
|
|
fp->_r = 0;
|
|
p += r;
|
|
resid -= r;
|
|
if (__ssrefill_r (ptr, fp))
|
|
{
|
|
/* no more input: return partial result */
|
|
return (total - resid) / size;
|
|
}
|
|
}
|
|
_CAST_VOID memcpy ((_PTR) p, (_PTR) fp->_p, resid);
|
|
fp->_r -= resid;
|
|
fp->_p += resid;
|
|
return count;
|
|
}
|
|
#else /* !STRING_ONLY || !INTEGER_ONLY */
|
|
int _EXFUN (_sungetc_r, (struct _reent *, int, register FILE *));
|
|
int _EXFUN (__ssrefill_r, (struct _reent *, register FILE *));
|
|
size_t _EXFUN (_sfread_r, (struct _reent *, _PTR buf, size_t, size_t, FILE *));
|
|
#endif /* !STRING_ONLY || !INTEGER_ONLY */
|
|
|
|
int
|
|
_DEFUN(__SVFSCANF_R, (rptr, fp, fmt0, ap),
|
|
struct _reent *rptr _AND
|
|
register FILE *fp _AND
|
|
char _CONST *fmt0 _AND
|
|
va_list ap)
|
|
{
|
|
register u_char *fmt = (u_char *) fmt0;
|
|
register int c; /* character from format, or conversion */
|
|
register size_t width; /* field width, or 0 */
|
|
register char *p; /* points into all kinds of strings */
|
|
register int n; /* handy integer */
|
|
register int flags; /* flags as defined above */
|
|
register char *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 strtol/strtoul */
|
|
int nbytes = 1; /* number of bytes read from fmt string */
|
|
wchar_t wc; /* wchar to use to read format string */
|
|
wchar_t *wcp; /* handy wide character pointer */
|
|
size_t mbslen; /* length of converted multibyte sequence */
|
|
#ifdef _MB_CAPABLE
|
|
mbstate_t state; /* value to keep track of multibyte state */
|
|
#endif
|
|
|
|
#define CCFN_PARAMS _PARAMS((struct _reent *, const char *, char **, int))
|
|
u_long (*ccfn)CCFN_PARAMS=0; /* conversion function (strtol/strtoul) */
|
|
char ccltab[256]; /* character class table for %[...] */
|
|
char buf[BUF]; /* buffer for numeric conversions */
|
|
unsigned char *lptr; /* literal pointer */
|
|
|
|
char *cp;
|
|
short *sp;
|
|
int *ip;
|
|
#ifdef FLOATING_POINT
|
|
float *flp;
|
|
_LONG_DOUBLE *ldp;
|
|
double *dp;
|
|
#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
|
|
|
|
_newlib_flockfile_start (fp);
|
|
|
|
ORIENT (fp, -1);
|
|
|
|
nassigned = 0;
|
|
nread = 0;
|
|
#ifdef _MB_CAPABLE
|
|
memset (&state, 0, sizeof (state));
|
|
#endif
|
|
|
|
for (;;)
|
|
{
|
|
#ifndef _MB_CAPABLE
|
|
wc = *fmt;
|
|
#else
|
|
nbytes = __mbtowc (rptr, &wc, (char *) fmt, MB_CUR_MAX,
|
|
__locale_charset (), &state);
|
|
if (nbytes < 0) {
|
|
wc = 0xFFFD; /* Unicode replacement character */
|
|
nbytes = 1;
|
|
memset (&state, 0, sizeof (state));
|
|
}
|
|
#endif
|
|
fmt += nbytes;
|
|
|
|
if (wc == 0)
|
|
goto all_done;
|
|
if (nbytes == 1 && isspace (wc))
|
|
{
|
|
for (;;)
|
|
{
|
|
if (BufferEmpty || !isspace (*fp->_p))
|
|
break;
|
|
nread++, fp->_r--, fp->_p++;
|
|
}
|
|
continue;
|
|
}
|
|
if (wc != '%')
|
|
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 '%':
|
|
literal:
|
|
lptr = fmt - nbytes;
|
|
for (n = 0; n < nbytes; ++n)
|
|
{
|
|
if (BufferEmpty)
|
|
goto input_failure;
|
|
if (*fp->_p != *lptr)
|
|
goto match_failure;
|
|
fp->_r--, fp->_p++;
|
|
nread++;
|
|
++lptr;
|
|
}
|
|
continue;
|
|
|
|
case '*':
|
|
flags |= SUPPRESS;
|
|
goto again;
|
|
case 'l':
|
|
#if defined _WANT_IO_C99_FORMATS || !defined _NO_LONGLONG
|
|
if (*fmt == 'l') /* Check for 'll' = long long (SUSv3) */
|
|
{
|
|
++fmt;
|
|
flags |= LONGDBL;
|
|
}
|
|
else
|
|
#endif
|
|
flags |= LONG;
|
|
goto again;
|
|
case 'L':
|
|
flags |= LONGDBL;
|
|
goto again;
|
|
case '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 'j': /* intmax_t */
|
|
if (sizeof (intmax_t) == sizeof (long))
|
|
flags |= LONG;
|
|
else
|
|
flags |= LONGDBL;
|
|
goto again;
|
|
case '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 '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 '0':
|
|
case '1':
|
|
case '2':
|
|
case '3':
|
|
case '4':
|
|
case '5':
|
|
case '6':
|
|
case '7':
|
|
case '8':
|
|
case '9':
|
|
width = width * 10 + c - '0';
|
|
goto again;
|
|
|
|
#ifndef _NO_POS_ARGS
|
|
case '$':
|
|
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 */
|
|
|
|
/*
|
|
* Conversions. Those marked `compat' are for
|
|
* 4.[123]BSD compatibility.
|
|
*
|
|
* (According to ANSI, E and X formats are supposed to
|
|
* the same as e and x. Sorry about that.)
|
|
*/
|
|
|
|
case 'D': /* compat */
|
|
flags |= LONG;
|
|
/* FALLTHROUGH */
|
|
case 'd':
|
|
c = CT_INT;
|
|
ccfn = (u_long (*)CCFN_PARAMS)_strtol_r;
|
|
base = 10;
|
|
break;
|
|
|
|
case 'i':
|
|
c = CT_INT;
|
|
ccfn = (u_long (*)CCFN_PARAMS)_strtol_r;
|
|
base = 0;
|
|
break;
|
|
|
|
case 'O': /* compat */
|
|
flags |= LONG;
|
|
/* FALLTHROUGH */
|
|
case 'o':
|
|
c = CT_INT;
|
|
ccfn = _strtoul_r;
|
|
base = 8;
|
|
break;
|
|
|
|
case 'u':
|
|
c = CT_INT;
|
|
ccfn = _strtoul_r;
|
|
base = 10;
|
|
break;
|
|
|
|
case 'X':
|
|
case 'x':
|
|
flags |= PFXOK; /* enable 0x prefixing */
|
|
c = CT_INT;
|
|
ccfn = _strtoul_r;
|
|
base = 16;
|
|
break;
|
|
|
|
#ifdef FLOATING_POINT
|
|
# ifdef _WANT_IO_C99_FORMATS
|
|
case 'a':
|
|
case 'A':
|
|
case 'F':
|
|
# endif
|
|
case 'E':
|
|
case 'G':
|
|
case 'e':
|
|
case 'f':
|
|
case 'g':
|
|
c = CT_FLOAT;
|
|
break;
|
|
#endif
|
|
|
|
#ifdef _WANT_IO_C99_FORMATS
|
|
case 'S':
|
|
flags |= LONG;
|
|
/* FALLTHROUGH */
|
|
#endif
|
|
|
|
case 's':
|
|
c = CT_STRING;
|
|
break;
|
|
|
|
case '[':
|
|
fmt = (u_char *) __sccl (ccltab, (unsigned char *) 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 = _strtoul_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 '\0': /* compat */
|
|
_newlib_flockfile_exit (fp);
|
|
return EOF;
|
|
|
|
default: /* compat */
|
|
if (isupper (c))
|
|
flags |= LONG;
|
|
c = CT_INT;
|
|
ccfn = (u_long (*)CCFN_PARAMS)_strtol_r;
|
|
base = 10;
|
|
break;
|
|
}
|
|
|
|
/*
|
|
* We have a conversion that requires input.
|
|
*/
|
|
if (BufferEmpty)
|
|
goto input_failure;
|
|
|
|
/*
|
|
* Consume leading white space, except for formats that
|
|
* suppress this.
|
|
*/
|
|
if ((flags & NOSKIP) == 0)
|
|
{
|
|
while (isspace (*fp->_p))
|
|
{
|
|
nread++;
|
|
if (--fp->_r > 0)
|
|
fp->_p++;
|
|
else
|
|
if (__srefill_r (rptr, fp))
|
|
goto input_failure;
|
|
}
|
|
/*
|
|
* Note that there is at least one character in the
|
|
* buffer, so conversions that do not set NOSKIP ca
|
|
* no longer result in an input failure.
|
|
*/
|
|
}
|
|
|
|
/*
|
|
* Do the conversion.
|
|
*/
|
|
switch (c)
|
|
{
|
|
|
|
case CT_CHAR:
|
|
/* scan arbitrary characters (sets NOSKIP) */
|
|
if (width == 0)
|
|
width = 1;
|
|
#if !defined(_ELIX_LEVEL) || _ELIX_LEVEL >= 2
|
|
if (flags & LONG)
|
|
{
|
|
mbstate_t state;
|
|
memset (&state, 0, sizeof (mbstate_t));
|
|
if ((flags & SUPPRESS) == 0)
|
|
wcp = GET_ARG (N, ap, wchar_t *);
|
|
else
|
|
wcp = NULL;
|
|
n = 0;
|
|
while (width != 0)
|
|
{
|
|
if (n == MB_CUR_MAX)
|
|
goto input_failure;
|
|
buf[n++] = *fp->_p;
|
|
fp->_r -= 1;
|
|
fp->_p += 1;
|
|
if ((mbslen = _mbrtowc_r (rptr, wcp, buf, n, &state))
|
|
== (size_t)-1)
|
|
goto input_failure; /* Invalid sequence */
|
|
if (mbslen == 0 && !(flags & SUPPRESS))
|
|
*wcp = L'\0';
|
|
if (mbslen != (size_t)-2) /* Incomplete sequence */
|
|
{
|
|
nread += n;
|
|
width -= 1;
|
|
if (!(flags & SUPPRESS))
|
|
wcp += 1;
|
|
n = 0;
|
|
}
|
|
if (BufferEmpty)
|
|
{
|
|
if (n != 0)
|
|
goto input_failure;
|
|
break;
|
|
}
|
|
}
|
|
if (!(flags & SUPPRESS))
|
|
nassigned++;
|
|
}
|
|
else
|
|
#endif
|
|
if (flags & SUPPRESS)
|
|
{
|
|
size_t sum = 0;
|
|
for (;;)
|
|
{
|
|
if ((n = fp->_r) < (int)width)
|
|
{
|
|
sum += n;
|
|
width -= n;
|
|
fp->_p += n;
|
|
if (__srefill_r (rptr, fp))
|
|
{
|
|
if (sum == 0)
|
|
goto input_failure;
|
|
break;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
sum += width;
|
|
fp->_r -= width;
|
|
fp->_p += width;
|
|
break;
|
|
}
|
|
}
|
|
nread += sum;
|
|
}
|
|
else
|
|
{
|
|
size_t r = _fread_r (rptr, (_PTR) GET_ARG (N, ap, char *), 1, width, fp);
|
|
|
|
if (r == 0)
|
|
goto input_failure;
|
|
nread += r;
|
|
nassigned++;
|
|
}
|
|
break;
|
|
|
|
case CT_CCL:
|
|
/* scan a (nonempty) character class (sets NOSKIP) */
|
|
if (width == 0)
|
|
width = ~0; /* `infinity' */
|
|
/* take only those things in the class */
|
|
if (flags & SUPPRESS)
|
|
{
|
|
n = 0;
|
|
while (ccltab[*fp->_p])
|
|
{
|
|
n++, fp->_r--, fp->_p++;
|
|
if (--width == 0)
|
|
break;
|
|
if (BufferEmpty)
|
|
{
|
|
if (n == 0)
|
|
goto input_failure;
|
|
break;
|
|
}
|
|
}
|
|
if (n == 0)
|
|
goto match_failure;
|
|
}
|
|
else
|
|
{
|
|
p0 = p = GET_ARG (N, ap, char *);
|
|
while (ccltab[*fp->_p])
|
|
{
|
|
fp->_r--;
|
|
*p++ = *fp->_p++;
|
|
if (--width == 0)
|
|
break;
|
|
if (BufferEmpty)
|
|
{
|
|
if (p == p0)
|
|
goto input_failure;
|
|
break;
|
|
}
|
|
}
|
|
n = p - p0;
|
|
if (n == 0)
|
|
goto match_failure;
|
|
*p = 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 !defined(_ELIX_LEVEL) || _ELIX_LEVEL >= 2
|
|
if (flags & LONG)
|
|
{
|
|
/* Process %S and %ls placeholders */
|
|
mbstate_t state;
|
|
memset (&state, 0, sizeof (mbstate_t));
|
|
if ((flags & SUPPRESS) == 0)
|
|
wcp = GET_ARG (N, ap, wchar_t *);
|
|
else
|
|
wcp = &wc;
|
|
n = 0;
|
|
while (!isspace (*fp->_p) && width != 0)
|
|
{
|
|
if (n == MB_CUR_MAX)
|
|
goto input_failure;
|
|
buf[n++] = *fp->_p;
|
|
fp->_r -= 1;
|
|
fp->_p += 1;
|
|
if ((mbslen = _mbrtowc_r (rptr, wcp, buf, n, &state))
|
|
== (size_t)-1)
|
|
goto input_failure;
|
|
if (mbslen == 0)
|
|
*wcp = L'\0';
|
|
if (mbslen != (size_t)-2) /* Incomplete sequence */
|
|
{
|
|
if (iswspace(*wcp))
|
|
{
|
|
while (n != 0)
|
|
_ungetc_r (rptr, (unsigned char) buf[--n], fp);
|
|
break;
|
|
}
|
|
nread += n;
|
|
width -= 1;
|
|
if ((flags & SUPPRESS) == 0)
|
|
wcp += 1;
|
|
n = 0;
|
|
}
|
|
if (BufferEmpty)
|
|
{
|
|
if (n != 0)
|
|
goto input_failure;
|
|
break;
|
|
}
|
|
}
|
|
if (!(flags & SUPPRESS))
|
|
{
|
|
*wcp = L'\0';
|
|
nassigned++;
|
|
}
|
|
}
|
|
else
|
|
#endif
|
|
if (flags & SUPPRESS)
|
|
{
|
|
n = 0;
|
|
while (!isspace (*fp->_p))
|
|
{
|
|
n++, fp->_r--, fp->_p++;
|
|
if (--width == 0)
|
|
break;
|
|
if (BufferEmpty)
|
|
break;
|
|
}
|
|
nread += n;
|
|
}
|
|
else
|
|
{
|
|
p0 = p = GET_ARG (N, ap, char *);
|
|
while (!isspace (*fp->_p))
|
|
{
|
|
fp->_r--;
|
|
*p++ = *fp->_p++;
|
|
if (--width == 0)
|
|
break;
|
|
if (BufferEmpty)
|
|
break;
|
|
}
|
|
*p = 0;
|
|
nread += p - p0;
|
|
nassigned++;
|
|
}
|
|
continue;
|
|
|
|
case CT_INT:
|
|
{
|
|
/* scan an integer as if by strtol/strtoul */
|
|
unsigned width_left = 0;
|
|
int skips = 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 | NZDIGITS | NNZDIGITS;
|
|
for (p = buf; width; width--)
|
|
{
|
|
c = *fp->_p;
|
|
/*
|
|
* 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 '0':
|
|
if (! (flags & NNZDIGITS))
|
|
goto ok;
|
|
if (base == 0)
|
|
{
|
|
base = 8;
|
|
flags |= PFXOK;
|
|
}
|
|
if (flags & NZDIGITS)
|
|
{
|
|
flags &= ~(SIGNOK | NZDIGITS | NDIGITS);
|
|
goto ok;
|
|
}
|
|
flags &= ~(SIGNOK | PFXOK | NDIGITS);
|
|
if (width_left)
|
|
{
|
|
width_left--;
|
|
width++;
|
|
}
|
|
++skips;
|
|
goto skip;
|
|
|
|
/* 1 through 7 always legal */
|
|
case '1':
|
|
case '2':
|
|
case '3':
|
|
case '4':
|
|
case '5':
|
|
case '6':
|
|
case '7':
|
|
base = basefix[base];
|
|
flags &= ~(SIGNOK | PFXOK | NDIGITS | NNZDIGITS);
|
|
goto ok;
|
|
|
|
/* digits 8 and 9 ok iff decimal or hex */
|
|
case '8':
|
|
case '9':
|
|
base = basefix[base];
|
|
if (base <= 8)
|
|
break; /* not legal here */
|
|
flags &= ~(SIGNOK | PFXOK | NDIGITS | NNZDIGITS);
|
|
goto ok;
|
|
|
|
/* letters ok iff hex */
|
|
case 'A':
|
|
case 'B':
|
|
case 'C':
|
|
case 'D':
|
|
case 'E':
|
|
case 'F':
|
|
case 'a':
|
|
case 'b':
|
|
case 'c':
|
|
case 'd':
|
|
case 'e':
|
|
case 'f':
|
|
/* no need to fix base here */
|
|
if (base <= 10)
|
|
break; /* not legal here */
|
|
flags &= ~(SIGNOK | PFXOK | NDIGITS | NNZDIGITS);
|
|
goto ok;
|
|
|
|
/* sign ok only as first character */
|
|
case '+':
|
|
case '-':
|
|
if (flags & SIGNOK)
|
|
{
|
|
flags &= ~SIGNOK;
|
|
goto ok;
|
|
}
|
|
break;
|
|
|
|
/* x ok iff flag still set & single 0 seen */
|
|
case 'x':
|
|
case 'X':
|
|
if ((flags & (PFXOK | NZDIGITS)) == PFXOK)
|
|
{
|
|
base = 16;/* if %i */
|
|
flags &= ~PFXOK;
|
|
/* We must reset the NZDIGITS and NDIGITS
|
|
flags that would have been unset by seeing
|
|
the zero that preceded the X or x. */
|
|
flags |= NZDIGITS | NDIGITS;
|
|
goto ok;
|
|
}
|
|
break;
|
|
}
|
|
|
|
/*
|
|
* If we got here, c is not a legal character
|
|
* for a number. Stop accumulating digits.
|
|
*/
|
|
break;
|
|
ok:
|
|
/*
|
|
* c is legal: store it and look at the next.
|
|
*/
|
|
*p++ = c;
|
|
skip:
|
|
if (--fp->_r > 0)
|
|
fp->_p++;
|
|
else
|
|
if (__srefill_r (rptr, fp))
|
|
break; /* EOF */
|
|
}
|
|
/*
|
|
* 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)
|
|
_ungetc_r (rptr, *--p, fp); /* [-+xX] */
|
|
if (p == buf)
|
|
goto match_failure;
|
|
}
|
|
if ((flags & SUPPRESS) == 0)
|
|
{
|
|
u_long res;
|
|
|
|
*p = 0;
|
|
res = (*ccfn) (rptr, buf, (char **) NULL, base);
|
|
if (flags & POINTER)
|
|
{
|
|
void **vp = GET_ARG (N, ap, void **);
|
|
#ifndef _NO_LONGLONG
|
|
if (sizeof (uintptr_t) > sizeof (u_long))
|
|
{
|
|
u_long_long resll;
|
|
resll = _strtoull_r (rptr, buf, (char **) 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)
|
|
{
|
|
u_long_long resll;
|
|
if (ccfn == _strtoul_r)
|
|
resll = _strtoull_r (rptr, buf, (char **) NULL, base);
|
|
else
|
|
resll = _strtoll_r (rptr, buf, (char **) 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 + skips;
|
|
break;
|
|
}
|
|
#ifdef FLOATING_POINT
|
|
case CT_FLOAT:
|
|
{
|
|
/* scan a floating point number as if by strtod */
|
|
/* 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;
|
|
char *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 = *fp->_p;
|
|
/*
|
|
* This code mimicks the integer conversion
|
|
* code, but is much simpler.
|
|
*/
|
|
switch (c)
|
|
{
|
|
case '0':
|
|
if (flags & NDIGITS)
|
|
{
|
|
flags &= ~SIGNOK;
|
|
zeroes++;
|
|
if (width_left)
|
|
{
|
|
width_left--;
|
|
width++;
|
|
}
|
|
goto fskip;
|
|
}
|
|
/* Fall through. */
|
|
case '1':
|
|
case '2':
|
|
case '3':
|
|
case '4':
|
|
case '5':
|
|
case '6':
|
|
case '7':
|
|
case '8':
|
|
case '9':
|
|
if (nancount + infcount == 0)
|
|
{
|
|
flags &= ~(SIGNOK | NDIGITS);
|
|
goto fok;
|
|
}
|
|
break;
|
|
|
|
case '+':
|
|
case '-':
|
|
if (flags & SIGNOK)
|
|
{
|
|
flags &= ~SIGNOK;
|
|
goto fok;
|
|
}
|
|
break;
|
|
case 'n':
|
|
case '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 'a':
|
|
case 'A':
|
|
if (nancount == 1)
|
|
{
|
|
nancount = 2;
|
|
goto fok;
|
|
}
|
|
break;
|
|
case 'i':
|
|
case '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 'f':
|
|
case 'F':
|
|
if (infcount == 2)
|
|
{
|
|
infcount = 3;
|
|
goto fok;
|
|
}
|
|
break;
|
|
case 't':
|
|
case 'T':
|
|
if (infcount == 6)
|
|
{
|
|
infcount = 7;
|
|
goto fok;
|
|
}
|
|
break;
|
|
case 'y':
|
|
case 'Y':
|
|
if (infcount == 7)
|
|
{
|
|
infcount = 8;
|
|
goto fok;
|
|
}
|
|
break;
|
|
case '.':
|
|
if (flags & DPTOK)
|
|
{
|
|
flags &= ~(SIGNOK | DPTOK);
|
|
leading_zeroes = zeroes;
|
|
goto fok;
|
|
}
|
|
break;
|
|
case 'e':
|
|
case '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;
|
|
}
|
|
break;
|
|
fok:
|
|
*p++ = c;
|
|
fskip:
|
|
width--;
|
|
++nread;
|
|
if (--fp->_r > 0)
|
|
fp->_p++;
|
|
else
|
|
if (__srefill_r (rptr, fp))
|
|
break; /* EOF */
|
|
}
|
|
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)
|
|
{
|
|
_ungetc_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)
|
|
{
|
|
_ungetc_r (rptr, *--p, fp); /* [iInNtT] */
|
|
--nread;
|
|
}
|
|
else
|
|
{
|
|
while (p > buf)
|
|
{
|
|
_ungetc_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)
|
|
{
|
|
_ungetc_r (rptr, *--p, fp); /* [-+.] */
|
|
--nread;
|
|
}
|
|
goto match_failure;
|
|
}
|
|
/* just a bad exponent (e and maybe sign) */
|
|
c = *--p;
|
|
--nread;
|
|
if (c != 'e' && c != 'E')
|
|
{
|
|
_ungetc_r (rptr, c, fp); /* [-+] */
|
|
c = *--p;
|
|
--nread;
|
|
}
|
|
_ungetc_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 = _strtol_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;
|
|
sprintf (exp_start, "e%ld", new_exp);
|
|
}
|
|
|
|
/* Current _strtold routine is markedly slower than
|
|
_strtod_r. Only use it if we have a long double
|
|
result. */
|
|
#ifndef _NO_LONGDBL /* !_NO_LONGDBL */
|
|
if (flags & LONGDBL)
|
|
qres = _strtold (buf, NULL);
|
|
else
|
|
#endif
|
|
res = _strtod_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 scanf, 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 */
|