1647 lines
39 KiB
C
1647 lines
39 KiB
C
/*-
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* Copyright (c) 1990 The Regents of the University of California.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms are permitted
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* provided that the above copyright notice and this paragraph are
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* duplicated in all such forms and that any documentation,
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* and/or other materials related to such
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* distribution and use acknowledge that the software was developed
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* by the University of California, Berkeley. The name of the
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* University may not be used to endorse or promote products derived
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* from this software without specific prior written permission.
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* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
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*/
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/*
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FUNCTION
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<<vfwscanf>>, <<vwscanf>>, <<vswscanf>>---scan and format argument list from wide character input
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INDEX
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vfwscanf
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INDEX
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_vfwscanf
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INDEX
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vwscanf
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INDEX
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_vwscanf
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INDEX
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vswscanf
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INDEX
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_vswscanf
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SYNOPSIS
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#include <stdio.h>
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#include <stdarg.h>
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int vwscanf(const wchar_t *__restrict <[fmt]>, va_list <[list]>);
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int vfwscanf(FILE *__restrict <[fp]>,
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const wchar_t *__restrict <[fmt]>, va_list <[list]>);
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int vswscanf(const wchar_t *__restrict <[str]>,
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const wchar_t *__restrict <[fmt]>, va_list <[list]>);
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int _vwscanf(struct _reent *<[reent]>, const wchar_t *<[fmt]>,
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va_list <[list]>);
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int _vfwscanf(struct _reent *<[reent]>, FILE *<[fp]>,
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const wchar_t *<[fmt]>, va_list <[list]>);
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int _vswscanf(struct _reent *<[reent]>, const wchar_t *<[str]>,
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const wchar_t *<[fmt]>, va_list <[list]>);
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DESCRIPTION
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<<vwscanf>>, <<vfwscanf>>, and <<vswscanf>> are (respectively) variants
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of <<wscanf>>, <<fwscanf>>, and <<swscanf>>. They differ only in
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allowing their caller to pass the variable argument list as a
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<<va_list>> object (initialized by <<va_start>>) rather than
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directly accepting a variable number of arguments.
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RETURNS
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The return values are consistent with the corresponding functions:
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<<vwscanf>> returns the number of input fields successfully scanned,
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converted, and stored; the return value does not include scanned
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fields which were not stored.
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If <<vwscanf>> attempts to read at end-of-file, the return value
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is <<EOF>>.
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If no fields were stored, the return value is <<0>>.
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The routines <<_vwscanf>>, <<_vfwscanf>>, and <<_vswscanf>> are
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reentrant versions which take an additional first parameter which points
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to the reentrancy structure.
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PORTABILITY
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C99, POSIX-1.2008
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*/
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#include <_ansi.h>
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#include <reent.h>
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#include <newlib.h>
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#include <ctype.h>
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#include <wctype.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <stdint.h>
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#include <limits.h>
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#include <wchar.h>
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#include <string.h>
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#include <stdarg.h>
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#include <errno.h>
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#include "local.h"
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#ifdef INTEGER_ONLY
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#define VFWSCANF vfiwscanf
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#define _VFWSCANF_R _vfiwscanf_r
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#define __SVFWSCANF __svfiwscanf
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#ifdef STRING_ONLY
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# define __SVFWSCANF_R __ssvfiwscanf_r
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#else
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# define __SVFWSCANF_R __svfiwscanf_r
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#endif
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#else
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#define VFWSCANF vfwscanf
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#define _VFWSCANF_R _vfwscanf_r
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#define __SVFWSCANF __svfwscanf
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#ifdef STRING_ONLY
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# define __SVFWSCANF_R __ssvfwscanf_r
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#else
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# define __SVFWSCANF_R __svfwscanf_r
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#endif
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#ifndef NO_FLOATING_POINT
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#define FLOATING_POINT
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#endif
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#endif
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#ifdef STRING_ONLY
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#undef _newlib_flockfile_start
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#undef _newlib_flockfile_exit
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#undef _newlib_flockfile_end
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#define _newlib_flockfile_start(x) {}
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#define _newlib_flockfile_exit(x) {}
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#define _newlib_flockfile_end(x) {}
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#define _ungetwc_r _sungetwc_r
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#define __srefill_r __ssrefill_r
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#define _fgetwc_r _sfgetwc_r
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#endif
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#ifdef FLOATING_POINT
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#include <math.h>
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#include <float.h>
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#include <locale.h>
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#ifdef __HAVE_LOCALE_INFO_EXTENDED__
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#include "../locale/setlocale.h"
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#endif
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/* Currently a test is made to see if long double processing is warranted.
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This could be changed in the future should the _ldtoa_r code be
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preferred over _dtoa_r. */
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#define _NO_LONGDBL
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#if defined _WANT_IO_LONG_DOUBLE && (LDBL_MANT_DIG > DBL_MANT_DIG)
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#undef _NO_LONGDBL
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extern _LONG_DOUBLE _wcstold_r (wchar_t *s, wchar_t **sptr);
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#endif
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#include "floatio.h"
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#if ((MAXEXP+MAXFRACT+3) > MB_LEN_MAX)
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# define BUF (MAXEXP+MAXFRACT+3) /* 3 = sign + decimal point + NUL */
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#else
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# define BUF MB_LEN_MAX
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#endif
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/* An upper bound for how long a long prints in decimal. 4 / 13 approximates
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log (2). Add one char for roundoff compensation and one for the sign. */
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#define MAX_LONG_LEN ((CHAR_BIT * sizeof (long) - 1) * 4 / 13 + 2)
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#else
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#define BUF 40
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#endif
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#define _NO_LONGLONG
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#if defined _WANT_IO_LONG_LONG \
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&& (defined __GNUC__ || __STDC_VERSION__ >= 199901L)
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# undef _NO_LONGLONG
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#endif
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#define _NO_POS_ARGS
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#ifdef _WANT_IO_POS_ARGS
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# undef _NO_POS_ARGS
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# ifdef NL_ARGMAX
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# define MAX_POS_ARGS NL_ARGMAX
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# else
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# define MAX_POS_ARGS 32
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# endif
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static void * get_arg (int, va_list *, int *, void **);
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#endif /* _WANT_IO_POS_ARGS */
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/*
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* Flags used during conversion.
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*/
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#define LONG 0x01 /* l: long or double */
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#define LONGDBL 0x02 /* L/ll: long double or long long */
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#define SHORT 0x04 /* h: short */
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#define CHAR 0x08 /* hh: 8 bit integer */
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#define SUPPRESS 0x10 /* suppress assignment */
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#define POINTER 0x20 /* weird %p pointer (`fake hex') */
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#define NOSKIP 0x40 /* do not skip blanks */
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#define MALLOC 0x80 /* handle 'm' modifier */
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/*
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* The following are used in numeric conversions only:
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* SIGNOK, NDIGITS, DPTOK, and EXPOK are for floating point;
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* SIGNOK, NDIGITS, PFXOK, and NZDIGITS are for integral.
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*/
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#define SIGNOK 0x80 /* +/- is (still) legal */
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#define NDIGITS 0x100 /* no digits detected */
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#define DPTOK 0x200 /* (float) decimal point is still legal */
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#define EXPOK 0x400 /* (float) exponent (e+3, etc) still legal */
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#define PFXOK 0x200 /* 0x prefix is (still) legal */
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#define NZDIGITS 0x400 /* no zero digits detected */
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#define HAVESIGN 0x10000 /* sign detected */
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/*
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* Conversion types.
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*/
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#define CT_CHAR 0 /* %c conversion */
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#define CT_CCL 1 /* %[...] conversion */
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#define CT_STRING 2 /* %s conversion */
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#define CT_INT 3 /* integer, i.e., wcstol or wcstoul */
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#define CT_FLOAT 4 /* floating, i.e., wcstod */
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#define INCCL(_c) \
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(cclcompl ? (wmemchr(ccls, (_c), ccle - ccls) == NULL) : \
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(wmemchr(ccls, (_c), ccle - ccls) != NULL))
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/*
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* vfwscanf
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*/
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#ifndef STRING_ONLY
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#ifndef _REENT_ONLY
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int
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VFWSCANF (register FILE *__restrict fp,
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const wchar_t *__restrict fmt,
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va_list ap)
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{
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struct _reent *reent = _REENT;
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CHECK_INIT(reent, fp);
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return __SVFWSCANF_R (reent, fp, fmt, ap);
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}
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int
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__SVFWSCANF (register FILE *fp,
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wchar_t const *fmt0,
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va_list ap)
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{
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return __SVFWSCANF_R (_REENT, fp, fmt0, ap);
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}
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#endif /* !_REENT_ONLY */
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int
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_VFWSCANF_R (struct _reent *data,
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register FILE *fp,
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const wchar_t *fmt,
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va_list ap)
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{
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CHECK_INIT(data, fp);
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return __SVFWSCANF_R (data, fp, fmt, ap);
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}
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#endif /* !STRING_ONLY */
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#ifdef STRING_ONLY
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/* When dealing with the swscanf family, we don't want to use the
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* regular ungetwc which will drag in file I/O items we don't need.
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* So, we create our own trimmed-down version. */
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static wint_t
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_sungetwc_r (struct _reent *data,
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wint_t wc,
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register FILE *fp)
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{
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if (wc == WEOF)
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return (WEOF);
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/* After ungetc, we won't be at eof anymore */
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fp->_flags &= ~__SEOF;
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/* All ungetwc usage in scanf un-gets the current character, so
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* just back up over the string if we aren't at the start
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*/
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if (fp->_bf._base != NULL && fp->_p > fp->_bf._base)
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{
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fp->_p -= sizeof (wchar_t);
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fp->_r += sizeof (wchar_t);
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}
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return wc;
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}
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extern int __ssrefill_r (struct _reent *ptr, register FILE * fp);
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static size_t
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_sfgetwc_r (struct _reent * ptr,
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FILE * fp)
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{
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wchar_t wc;
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if (fp->_r <= 0 && __ssrefill_r (ptr, fp))
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return (WEOF);
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wc = *(wchar_t *) fp->_p;
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fp->_p += sizeof (wchar_t);
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fp->_r -= sizeof (wchar_t);
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return (wc);
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}
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#endif /* STRING_ONLY */
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int
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__SVFWSCANF_R (struct _reent *rptr,
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register FILE *fp,
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wchar_t const *fmt0,
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va_list ap)
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{
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register wchar_t *fmt = (wchar_t *) fmt0;
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register wint_t c; /* character from format, or conversion */
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register size_t width; /* field width, or 0 */
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register wchar_t *p = NULL; /* points into all kinds of strings */
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register int n; /* handy integer */
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register int flags; /* flags as defined above */
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register wchar_t *p0; /* saves original value of p when necessary */
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int nassigned; /* number of fields assigned */
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int nread; /* number of characters consumed from fp */
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#ifndef _NO_POS_ARGS
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int N; /* arg number */
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int arg_index = 0; /* index into args processed directly */
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int numargs = 0; /* number of varargs read */
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void *args[MAX_POS_ARGS]; /* positional args read */
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int is_pos_arg; /* is current format positional? */
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#endif
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int base = 0; /* base argument to wcstol/wcstoul */
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mbstate_t mbs; /* value to keep track of multibyte state */
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#define CCFN_PARAMS (struct _reent *, const wchar_t *, wchar_t **, int)
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unsigned long (*ccfn)CCFN_PARAMS=0; /* conversion function (wcstol/wcstoul) */
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wchar_t buf[BUF]; /* buffer for numeric conversions */
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const wchar_t *ccls; /* character class start */
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const wchar_t *ccle; /* character class end */
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int cclcompl = 0; /* ccl is complemented? */
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wint_t wi; /* handy wint_t */
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char *mbp = NULL; /* multibyte string pointer for %c %s %[ */
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size_t nconv; /* number of bytes in mb. conversion */
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char mbbuf[MB_LEN_MAX]; /* temporary mb. character buffer */
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char *cp;
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short *sp;
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int *ip;
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#ifdef FLOATING_POINT
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float *flp;
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_LONG_DOUBLE *ldp;
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double *dp;
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wchar_t decpt;
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#endif
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long *lp;
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#ifndef _NO_LONGLONG
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long long *llp;
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#endif
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#ifdef _WANT_IO_C99_FORMATS
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#define _WANT_IO_POSIX_EXTENSIONS
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#endif
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#ifdef _WANT_IO_POSIX_EXTENSIONS
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/* POSIX requires that fwscanf frees all allocated strings from 'm'
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conversions in case it returns EOF. m_ptr is used to keep track.
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It will be allocated on the stack the first time an 'm' conversion
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takes place, and it will be free'd on return from the function.
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This implementation tries to save space by only allocating 8
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pointer slots at a time. Most scenarios should never have to call
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realloc again. This implementation allows only up to 65528 'm'
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conversions per fwscanf invocation for now. That should be enough
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for almost all scenarios, right? */
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struct m_ptrs {
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void ***m_arr; /* Array of pointer args to 'm' conversion */
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uint16_t m_siz; /* Number of slots in m_arr */
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uint16_t m_cnt; /* Number of valid entries in m_arr */
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} *m_ptr = NULL;
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#define init_m_ptr() \
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do \
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{ \
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if (!m_ptr) \
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{ \
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m_ptr = (struct m_ptrs *) alloca (sizeof *m_ptr); \
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m_ptr->m_arr = NULL; \
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m_ptr->m_siz = 0; \
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m_ptr->m_cnt = 0; \
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} \
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} \
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while (0)
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#define push_m_ptr(arg) \
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do \
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{ \
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if (m_ptr->m_cnt >= m_ptr->m_siz) \
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{ \
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void ***n = NULL; \
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\
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if (m_ptr->m_siz + 8 > 0 && m_ptr->m_siz + 8 < UINT16_MAX) \
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n = (void ***) realloc (m_ptr->m_arr, \
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(m_ptr->m_siz + 8) * \
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sizeof (void **)); \
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if (!n) \
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{ \
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nassigned = EOF; \
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goto match_failure; \
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} \
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m_ptr->m_arr = n; \
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m_ptr->m_siz += 8; \
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} \
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m_ptr->m_arr[m_ptr->m_cnt++] = (void **) (arg); \
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} \
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while (0)
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#define alloc_m_ptr(_type, _p, _p0, _p_p, _w) \
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({ \
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_p_p = GET_ARG (N, ap, _type **); \
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if (!_p_p) \
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goto match_failure; \
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_p0 = (_type *) malloc ((_w) * sizeof (_type)); \
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if (!_p0) \
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{ \
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nassigned = EOF; \
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goto match_failure; \
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} \
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*_p_p = _p0; \
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push_m_ptr (_p_p); \
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_p = _p0; \
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_w; \
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})
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|
/* For char output, check if there's room for at least MB_CUR_MAX
|
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characters. */
|
|
#define realloc_m_ptr(_type, _p, _p0, _p_p, _w) \
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|
({ \
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|
size_t _nw = (_w); \
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ptrdiff_t _dif = _p - _p0; \
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if (_p_p && \
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((sizeof (_type) == 1 && _dif >= _nw - MB_CUR_MAX) \
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|| _dif >= _nw)) \
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{ \
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_p0 = (_type *) realloc (_p0, (_nw << 1) * sizeof (_type)); \
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|
if (!_p0) \
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{ \
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nassigned = EOF; \
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|
goto match_failure; \
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|
} \
|
|
_p = _p0 + _dif; \
|
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*_p_p = _p0; \
|
|
_nw <<= 1; \
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|
} \
|
|
_nw; \
|
|
})
|
|
#define shrink_m_ptr(_type, _p_p, _w, _cw) \
|
|
({ \
|
|
size_t _nw = (_w); \
|
|
if (_p_p && _nw < _cw) \
|
|
{ \
|
|
_type *_np_p = (_type *) \
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|
realloc (*_p_p, _nw * sizeof (_type)); \
|
|
if (_np_p) \
|
|
*_p_p = _np_p; \
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|
} \
|
|
})
|
|
#define free_m_ptr() \
|
|
do \
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|
{ \
|
|
if (m_ptr) \
|
|
{ \
|
|
if (nassigned == EOF) \
|
|
{ \
|
|
int i; \
|
|
for (i = 0; i < m_ptr->m_cnt; ++i) \
|
|
{ \
|
|
free (*m_ptr->m_arr[i]); \
|
|
*m_ptr->m_arr[i] = NULL; \
|
|
} \
|
|
} \
|
|
if (m_ptr->m_arr) \
|
|
free (m_ptr->m_arr); \
|
|
} \
|
|
} \
|
|
while (0)
|
|
#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'*':
|
|
if ((flags & (CHAR | SHORT | LONG | LONGDBL | SUPPRESS | MALLOC))
|
|
|| width)
|
|
goto match_failure;
|
|
flags |= SUPPRESS;
|
|
goto again;
|
|
case L'l':
|
|
if (flags & (CHAR | SHORT | LONG | LONGDBL))
|
|
goto match_failure;
|
|
#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':
|
|
if (flags & (CHAR | SHORT | LONG | LONGDBL))
|
|
goto match_failure;
|
|
flags |= LONGDBL;
|
|
goto again;
|
|
case L'h':
|
|
#ifdef _WANT_IO_C99_FORMATS
|
|
if (flags & (CHAR | SHORT | LONG | LONGDBL))
|
|
goto match_failure;
|
|
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 (flags & (CHAR | SHORT | LONG | LONGDBL))
|
|
goto match_failure;
|
|
if (sizeof (intmax_t) == sizeof (long))
|
|
flags |= LONG;
|
|
else
|
|
flags |= LONGDBL;
|
|
goto again;
|
|
case L't': /* ptrdiff_t */
|
|
if (flags & (CHAR | SHORT | LONG | LONGDBL))
|
|
goto match_failure;
|
|
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 (flags & (CHAR | SHORT | LONG | LONGDBL))
|
|
goto match_failure;
|
|
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 */
|
|
#ifdef _WANT_IO_POSIX_EXTENSIONS
|
|
case 'm':
|
|
if (flags & (CHAR | SHORT | LONG | LONGDBL | MALLOC))
|
|
goto match_failure;
|
|
init_m_ptr ();
|
|
flags |= MALLOC;
|
|
goto again;
|
|
#endif
|
|
|
|
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':
|
|
if (flags & (CHAR | SHORT | LONG | LONGDBL | MALLOC))
|
|
goto match_failure;
|
|
width = width * 10 + c - L'0';
|
|
goto again;
|
|
|
|
#ifndef _NO_POS_ARGS
|
|
case L'$':
|
|
if (flags & (CHAR | SHORT | LONG | LONGDBL | SUPPRESS | MALLOC))
|
|
goto match_failure;
|
|
if (width <= MAX_POS_ARGS)
|
|
{
|
|
N = width - 1;
|
|
is_pos_arg = 1;
|
|
width = 0;
|
|
goto again;
|
|
}
|
|
_REENT_ERRNO(rptr) = 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'[':
|
|
if (*fmt == '^')
|
|
{
|
|
cclcompl = 1;
|
|
++fmt;
|
|
}
|
|
else
|
|
cclcompl = 0;
|
|
ccls = fmt;
|
|
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;
|
|
|
|
default:
|
|
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)
|
|
{
|
|
#ifdef _WANT_IO_POSIX_EXTENSIONS
|
|
wchar_t **p_p = NULL;
|
|
wchar_t *p0 = NULL;
|
|
size_t p_siz = 0;
|
|
#endif
|
|
|
|
if (flags & SUPPRESS)
|
|
;
|
|
#ifdef _WANT_IO_POSIX_EXTENSIONS
|
|
else if (flags & MALLOC)
|
|
p_siz = alloc_m_ptr (wchar_t, p, p0, p_p, 32);
|
|
#endif
|
|
else
|
|
p = GET_ARG(N, ap, wchar_t *);
|
|
n = 0;
|
|
while (width-- != 0 && (wi = _fgetwc_r (rptr, fp)) != WEOF)
|
|
{
|
|
if (!(flags & SUPPRESS))
|
|
{
|
|
#ifdef _WANT_IO_POSIX_EXTENSIONS
|
|
/* Check before ++ because we never add a \0 */
|
|
p_siz = realloc_m_ptr (wchar_t, p, p0, p_p, p_siz);
|
|
#endif
|
|
*p++ = (wchar_t) wi;
|
|
}
|
|
n++;
|
|
}
|
|
if (n == 0)
|
|
goto input_failure;
|
|
nread += n;
|
|
#ifdef _WANT_IO_POSIX_EXTENSIONS
|
|
shrink_m_ptr (wchar_t, p_p, p - p0, p_siz);
|
|
#endif
|
|
if (!(flags & SUPPRESS))
|
|
nassigned++;
|
|
}
|
|
else
|
|
{
|
|
#ifdef _WANT_IO_POSIX_EXTENSIONS
|
|
char **mbp_p = NULL;
|
|
char *mbp0 = NULL;
|
|
size_t mbp_siz = 0;
|
|
#endif
|
|
|
|
if (flags & SUPPRESS)
|
|
mbp = mbbuf;
|
|
#ifdef _WANT_IO_POSIX_EXTENSIONS
|
|
else if (flags & MALLOC)
|
|
mbp_siz = alloc_m_ptr (char, mbp, mbp0, mbp_p, 32);
|
|
#endif
|
|
else
|
|
mbp = GET_ARG(N, ap, char *);
|
|
n = 0;
|
|
memset ((void *)&mbs, '\0', sizeof (mbstate_t));
|
|
while (width != 0 && (wi = _fgetwc_r (rptr, fp)) != WEOF)
|
|
{
|
|
nconv = _wcrtomb_r (rptr, mbp, wi, &mbs);
|
|
if (nconv == (size_t) -1)
|
|
goto input_failure;
|
|
/* Ignore high surrogate in width counting */
|
|
if (nconv != 0 || mbs.__count != -4)
|
|
width--;
|
|
if (!(flags & SUPPRESS))
|
|
{
|
|
#ifdef _WANT_IO_POSIX_EXTENSIONS
|
|
mbp_siz = realloc_m_ptr (char, mbp, mbp0, mbp_p, mbp_siz);
|
|
#endif
|
|
mbp += nconv;
|
|
}
|
|
n++;
|
|
}
|
|
if (n == 0)
|
|
goto input_failure;
|
|
nread += n;
|
|
#ifdef _WANT_IO_POSIX_EXTENSIONS
|
|
shrink_m_ptr (char, mbp_p, mbp - mbp0, mbp_siz);
|
|
#endif
|
|
if (!(flags & SUPPRESS))
|
|
nassigned++;
|
|
}
|
|
break;
|
|
|
|
case CT_CCL:
|
|
/* scan a (nonempty) character class (sets NOSKIP) */
|
|
if (width == 0)
|
|
width = SIZE_MAX; /* `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)
|
|
{
|
|
#ifdef _WANT_IO_POSIX_EXTENSIONS
|
|
wchar_t **p_p = NULL;
|
|
size_t p_siz = 0;
|
|
|
|
if (flags & MALLOC)
|
|
p_siz = alloc_m_ptr (wchar_t, p, p0, p_p, 32);
|
|
else
|
|
#endif
|
|
p0 = p = GET_ARG(N, ap, wchar_t *);
|
|
while ((wi = _fgetwc_r (rptr, fp)) != WEOF
|
|
&& width-- != 0 && INCCL (wi))
|
|
{
|
|
*p++ = (wchar_t) wi;
|
|
#ifdef _WANT_IO_POSIX_EXTENSIONS
|
|
p_siz = realloc_m_ptr (wchar_t, p, p0, p_p, p_siz);
|
|
#endif
|
|
}
|
|
if (wi != WEOF)
|
|
_ungetwc_r (rptr, wi, fp);
|
|
n = p - p0;
|
|
if (n == 0)
|
|
goto match_failure;
|
|
*p = L'\0';
|
|
#ifdef _WANT_IO_POSIX_EXTENSIONS
|
|
shrink_m_ptr (wchar_t, p_p, n + 1, p_siz);
|
|
#endif
|
|
nassigned++;
|
|
}
|
|
else
|
|
{
|
|
#ifdef _WANT_IO_POSIX_EXTENSIONS
|
|
char **mbp_p = NULL;
|
|
char *mbp0 = NULL;
|
|
size_t mbp_siz = 0;
|
|
#endif
|
|
|
|
if (flags & SUPPRESS)
|
|
mbp = mbbuf;
|
|
#ifdef _WANT_IO_POSIX_EXTENSIONS
|
|
else if (flags & MALLOC)
|
|
mbp_siz = alloc_m_ptr (char, mbp, mbp0, mbp_p, 32);
|
|
#endif
|
|
else
|
|
mbp = GET_ARG(N, ap, char *);
|
|
n = 0;
|
|
memset ((void *) &mbs, '\0', sizeof (mbstate_t));
|
|
while ((wi = _fgetwc_r (rptr, fp)) != WEOF
|
|
&& width != 0 && INCCL (wi))
|
|
{
|
|
nconv = _wcrtomb_r (rptr, mbp, wi, &mbs);
|
|
if (nconv == (size_t) -1)
|
|
goto input_failure;
|
|
/* Ignore high surrogate in width counting */
|
|
if (nconv != 0 || mbs.__count != -4)
|
|
width--;
|
|
if (!(flags & SUPPRESS))
|
|
{
|
|
mbp += nconv;
|
|
#ifdef _WANT_IO_POSIX_EXTENSIONS
|
|
mbp_siz = realloc_m_ptr (char, mbp, mbp0, mbp_p, mbp_siz);
|
|
#endif
|
|
}
|
|
n++;
|
|
}
|
|
if (wi != WEOF)
|
|
_ungetwc_r (rptr, wi, fp);
|
|
if (!(flags & SUPPRESS))
|
|
{
|
|
*mbp = 0;
|
|
#ifdef _WANT_IO_POSIX_EXTENSIONS
|
|
shrink_m_ptr (char, mbp_p, mbp - mbp0 + 1, mbp_siz);
|
|
#endif
|
|
nassigned++;
|
|
}
|
|
}
|
|
nread += n;
|
|
break;
|
|
|
|
case CT_STRING:
|
|
/* like CCL, but zero-length string OK, & no NOSKIP */
|
|
if (width == 0)
|
|
width = SIZE_MAX;
|
|
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)
|
|
{
|
|
#ifdef _WANT_IO_POSIX_EXTENSIONS
|
|
wchar_t **p_p = NULL;
|
|
size_t p_siz = 0;
|
|
|
|
if (flags & MALLOC)
|
|
p_siz = alloc_m_ptr (wchar_t, p, p0, p_p, 32);
|
|
else
|
|
#endif
|
|
p0 = p = GET_ARG(N, ap, wchar_t *);
|
|
while ((wi = _fgetwc_r (rptr, fp)) != WEOF
|
|
&& width-- != 0 && !iswspace (wi))
|
|
{
|
|
*p++ = (wchar_t) wi;
|
|
#ifdef _WANT_IO_POSIX_EXTENSIONS
|
|
p_siz = realloc_m_ptr (wchar_t, p, p0, p_p, p_siz);
|
|
#endif
|
|
nread++;
|
|
}
|
|
if (wi != WEOF)
|
|
_ungetwc_r (rptr, wi, fp);
|
|
*p = L'\0';
|
|
#ifdef _WANT_IO_POSIX_EXTENSIONS
|
|
shrink_m_ptr (wchar_t, p_p, p - p0 + 1, p_siz);
|
|
#endif
|
|
nassigned++;
|
|
}
|
|
else
|
|
{
|
|
#ifdef _WANT_IO_POSIX_EXTENSIONS
|
|
char **mbp_p = NULL;
|
|
char *mbp0 = NULL;
|
|
size_t mbp_siz = 0;
|
|
#endif
|
|
|
|
if (flags & SUPPRESS)
|
|
mbp = mbbuf;
|
|
#ifdef _WANT_IO_POSIX_EXTENSIONS
|
|
else if (flags & MALLOC)
|
|
mbp_siz = alloc_m_ptr (char, mbp, mbp0, mbp_p, 32);
|
|
#endif
|
|
else
|
|
mbp = GET_ARG(N, ap, char *);
|
|
memset ((void *) &mbs, '\0', sizeof (mbstate_t));
|
|
while ((wi = _fgetwc_r (rptr, fp)) != WEOF
|
|
&& width != 0 && !iswspace (wi))
|
|
{
|
|
nconv = wcrtomb(mbp, wi, &mbs);
|
|
if (nconv == (size_t)-1)
|
|
goto input_failure;
|
|
/* Ignore high surrogate in width counting */
|
|
if (nconv != 0 || mbs.__count != -4)
|
|
width--;
|
|
if (!(flags & SUPPRESS))
|
|
{
|
|
mbp += nconv;
|
|
#ifdef _WANT_IO_POSIX_EXTENSIONS
|
|
mbp_siz = realloc_m_ptr (char, mbp, mbp0, mbp_p, mbp_siz);
|
|
#endif
|
|
}
|
|
nread++;
|
|
}
|
|
if (wi != WEOF)
|
|
_ungetwc_r (rptr, wi, fp);
|
|
if (!(flags & SUPPRESS))
|
|
{
|
|
*mbp = 0;
|
|
#ifdef _WANT_IO_POSIX_EXTENSIONS
|
|
shrink_m_ptr (char, mbp_p, mbp - mbp0 + 1, mbp_siz);
|
|
#endif
|
|
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) / sizeof (*buf) - 1)
|
|
#else
|
|
/* size_t is unsigned, hence this optimisation */
|
|
if (width - 1 > sizeof (buf) / sizeof (*buf) - 2)
|
|
#endif
|
|
{
|
|
width_left = width - (sizeof (buf) / sizeof (*buf) - 1);
|
|
width = sizeof (buf) / 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) / sizeof (*buf)
|
|
- MAX_LONG_LEN)
|
|
exp_start = buf + sizeof (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 ("");
|
|
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. */
|
|
nassigned = 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);
|
|
#ifdef _WANT_IO_POSIX_EXTENSIONS
|
|
free_m_ptr ();
|
|
#endif
|
|
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 */
|