1290 lines
30 KiB
C
1290 lines
30 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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* advertising materials, and 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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<<vscanf>>, <<vfscanf>>, <<vsscanf>>---format argument list
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INDEX
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vscanf
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INDEX
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vfscanf
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INDEX
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vsscanf
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ANSI_SYNOPSIS
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#include <stdio.h>
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#include <stdarg.h>
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int vscanf(const char *<[fmt]>, va_list <[list]>);
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int vfscanf(FILE *<[fp]>, const char *<[fmt]>, va_list <[list]>);
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int vsscanf(const char *<[str]>, const char *<[fmt]>, va_list <[list]>);
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int _vscanf_r(struct _reent *<[reent]>, const char *<[fmt]>,
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va_list <[list]>);
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int _vfscanf_r(struct _reent *<[reent]>, FILE *<[fp]>, const char *<[fmt]>,
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va_list <[list]>);
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int _vsscanf_r(struct _reent *<[reent]>, const char *<[str]>,
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const char *<[fmt]>, va_list <[list]>);
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TRAD_SYNOPSIS
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#include <stdio.h>
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#include <varargs.h>
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int vscanf( <[fmt]>, <[ist]>)
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char *<[fmt]>;
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va_list <[list]>;
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int vfscanf( <[fp]>, <[fmt]>, <[list]>)
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FILE *<[fp]>;
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char *<[fmt]>;
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va_list <[list]>;
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int vsscanf( <[str]>, <[fmt]>, <[list]>)
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char *<[str]>;
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char *<[fmt]>;
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va_list <[list]>;
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int _vscanf_r( <[reent]>, <[fmt]>, <[ist]>)
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struct _reent *<[reent]>;
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char *<[fmt]>;
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va_list <[list]>;
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int _vfscanf_r( <[reent]>, <[fp]>, <[fmt]>, <[list]>)
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struct _reent *<[reent]>;
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FILE *<[fp]>;
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char *<[fmt]>;
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va_list <[list]>;
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int _vsscanf_r( <[reent]>, <[str]>, <[fmt]>, <[list]>)
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struct _reent *<[reent]>;
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char *<[str]>;
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char *<[fmt]>;
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va_list <[list]>;
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DESCRIPTION
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<<vscanf>>, <<vfscanf>>, and <<vsscanf>> are (respectively) variants
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of <<scanf>>, <<fscanf>>, and <<sscanf>>. 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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<<vscanf>> 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 <<vscanf>> 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 <<_vscanf_r>>, <<_vfscanf_f>>, and <<_vsscanf_r>> are
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reentrant versions which take an additional first parameter which points to the
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reentrancy structure.
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PORTABILITY
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These are GNU extensions.
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Supporting OS subroutines required:
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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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#ifdef _HAVE_STDC
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#include <stdarg.h>
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#else
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#include <varargs.h>
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#endif
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#include "local.h"
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#ifdef INTEGER_ONLY
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#define VFSCANF vfiscanf
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#define _VFSCANF_R _vfiscanf_r
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#define __SVFSCANF __svfiscanf
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#define __SVFSCANF_R __svfiscanf_r
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#else
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#define VFSCANF vfscanf
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#define _VFSCANF_R _vfscanf_r
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#define __SVFSCANF __svfscanf
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#define __SVFSCANF_R __svfscanf_r
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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 FLOATING_POINT
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#include <math.h>
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#include <float.h>
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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 _strtold _PARAMS((char *s, char **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 && defined __GNUC__
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# undef _NO_LONGLONG
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#endif
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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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/*
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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 NNZDIGITS 0x800 /* no non-zero digits 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., strtol or strtoul */
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#define CT_FLOAT 4 /* floating, i.e., strtod */
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#if 0
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#define u_char unsigned char
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#endif
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#define u_char char
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#define u_long unsigned long
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#ifndef _NO_LONGLONG
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typedef unsigned long long u_long_long;
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#endif
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/*static*/ u_char *__sccl ();
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/*
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* vfscanf
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*/
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#define BufferEmpty (fp->_r <= 0 && __srefill_r(rptr, fp))
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#ifndef _REENT_ONLY
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int
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_DEFUN(VFSCANF, (fp, fmt, ap),
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register FILE *fp _AND
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_CONST char *fmt _AND
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va_list ap)
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{
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CHECK_INIT(_REENT, fp);
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return __SVFSCANF_R (_REENT, fp, fmt, ap);
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}
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int
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_DEFUN(__SVFSCANF, (fp, fmt0, ap),
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register FILE *fp _AND
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char _CONST *fmt0 _AND
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va_list ap)
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{
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return __SVFSCANF_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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_DEFUN(_VFSCANF_R, (data, fp, fmt, ap),
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struct _reent *data _AND
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register FILE *fp _AND
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_CONST char *fmt _AND
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va_list ap)
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{
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CHECK_INIT(data, fp);
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return __SVFSCANF_R (data, fp, fmt, ap);
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}
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int
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_DEFUN(__SVFSCANF_R, (rptr, fp, fmt0, ap),
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struct _reent *rptr _AND
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register FILE *fp _AND
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char _CONST *fmt0 _AND
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va_list ap)
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{
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register u_char *fmt = (u_char *) fmt0;
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register int c; /* character from format, or conversion */
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register size_t width; /* field width, or 0 */
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register char *p; /* 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 char *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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int base = 0; /* base argument to strtol/strtoul */
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int nbytes = 1; /* number of bytes read from fmt string */
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wchar_t wc; /* wchar to use to read format string */
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wchar_t *wcp; /* handy wide character pointer */
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size_t mbslen; /* length of converted multibyte sequence */
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mbstate_t state; /* value to keep track of multibyte state */
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u_long (*ccfn) () = 0; /* conversion function (strtol/strtoul) */
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char ccltab[256]; /* character class table for %[...] */
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char buf[BUF]; /* buffer for numeric conversions */
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char *lptr; /* literal pointer */
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char *cp;
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short *sp;
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int *ip;
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float *flp;
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_LONG_DOUBLE *ldp;
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double *dp;
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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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/* `basefix' is used to avoid `if' tests in the integer scanner */
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static _CONST short basefix[17] =
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{10, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16};
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_flockfile (fp);
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nassigned = 0;
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nread = 0;
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for (;;)
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{
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#ifndef _MB_CAPABLE
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wc = *fmt;
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#else
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memset (&state, '\0', sizeof (state));
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nbytes = _mbtowc_r (rptr, &wc, fmt, MB_CUR_MAX, &state);
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#endif
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fmt += nbytes;
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if (wc == 0)
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goto all_done;
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if (nbytes == 1 && isspace (wc))
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{
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for (;;)
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{
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if (BufferEmpty || !isspace (*fp->_p))
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break;
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nread++, fp->_r--, fp->_p++;
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}
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continue;
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}
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if (wc != '%')
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goto literal;
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width = 0;
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flags = 0;
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/*
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* switch on the format. continue if done; break once format
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* type is derived.
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*/
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again:
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c = *fmt++;
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switch (c)
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{
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case '%':
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literal:
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lptr = fmt - nbytes;
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for (n = 0; n < nbytes; ++n)
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{
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if (BufferEmpty)
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goto input_failure;
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if (*fp->_p != *lptr)
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goto match_failure;
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fp->_r--, fp->_p++;
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nread++;
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++lptr;
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}
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continue;
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case '*':
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flags |= SUPPRESS;
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goto again;
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case 'l':
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#if defined _WANT_IO_C99_FORMATS || !defined _NO_LONGLONG
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if (*fmt == 'l') /* Check for 'll' = long long (SUSv3) */
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{
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++fmt;
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flags |= LONGDBL;
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}
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else
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#endif
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flags |= LONG;
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goto again;
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case 'L':
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flags |= LONGDBL;
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goto again;
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case 'h':
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#ifdef _WANT_IO_C99_FORMATS
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if (*fmt == 'h') /* Check for 'hh' = char int (SUSv3) */
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{
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++fmt;
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flags |= CHAR;
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}
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else
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#endif
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flags |= SHORT;
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goto again;
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#ifdef _WANT_IO_C99_FORMATS
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case 'j': /* intmax_t */
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if (sizeof (intmax_t) == sizeof (long))
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flags |= LONG;
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else
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flags |= LONGDBL;
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goto again;
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case 't': /* ptrdiff_t */
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if (sizeof (ptrdiff_t) < sizeof (int))
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/* POSIX states ptrdiff_t is 16 or more bits, as
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is short. */
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flags |= SHORT;
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else if (sizeof (ptrdiff_t) == sizeof (int))
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/* no flag needed */;
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else if (sizeof (ptrdiff_t) <= sizeof (long))
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flags |= LONG;
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else
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/* POSIX states that at least one programming
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environment must support ptrdiff_t no wider than
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long, but that means other environments can
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have ptrdiff_t as wide as long long. */
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flags |= LONGDBL;
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goto again;
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case 'z': /* size_t */
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if (sizeof (size_t) < sizeof (int))
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/* POSIX states size_t is 16 or more bits, as is short. */
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flags |= SHORT;
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else if (sizeof (size_t) == sizeof (int))
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/* no flag needed */;
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else if (sizeof (size_t) <= sizeof (long))
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flags |= LONG;
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else
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/* POSIX states that at least one programming
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environment must support size_t no wider than
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long, but that means other environments can
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have size_t as wide as long long. */
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flags |= LONGDBL;
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goto again;
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#endif /* _WANT_IO_C99_FORMATS */
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|
|
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case '0':
|
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case '1':
|
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case '2':
|
|
case '3':
|
|
case '4':
|
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case '5':
|
|
case '6':
|
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case '7':
|
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case '8':
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case '9':
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width = width * 10 + c - '0';
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goto again;
|
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|
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/*
|
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* Conversions. Those marked `compat' are for
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* 4.[123]BSD compatibility.
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*
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* (According to ANSI, E and X formats are supposed to
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* the same as e and x. Sorry about that.)
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|
*/
|
|
|
|
case 'D': /* compat */
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flags |= LONG;
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/* FALLTHROUGH */
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case 'd':
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c = CT_INT;
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ccfn = (u_long (*)())_strtol_r;
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base = 10;
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break;
|
|
|
|
case 'i':
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c = CT_INT;
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ccfn = (u_long (*)())_strtol_r;
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base = 0;
|
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break;
|
|
|
|
case 'O': /* compat */
|
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flags |= LONG;
|
|
/* FALLTHROUGH */
|
|
case 'o':
|
|
c = CT_INT;
|
|
ccfn = _strtoul_r;
|
|
base = 8;
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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 = __sccl (ccltab, 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 = va_arg (ap, char *);
|
|
*cp = nread;
|
|
}
|
|
else
|
|
#endif
|
|
if (flags & SHORT)
|
|
{
|
|
sp = va_arg (ap, short *);
|
|
*sp = nread;
|
|
}
|
|
else if (flags & LONG)
|
|
{
|
|
lp = va_arg (ap, long *);
|
|
*lp = nread;
|
|
}
|
|
#ifndef _NO_LONGLONG
|
|
else if (flags & LONGDBL)
|
|
{
|
|
llp = va_arg (ap, long long*);
|
|
*llp = nread;
|
|
}
|
|
#endif
|
|
else
|
|
{
|
|
ip = va_arg (ap, int *);
|
|
*ip = nread;
|
|
}
|
|
continue;
|
|
|
|
/*
|
|
* Disgusting backwards compatibility hacks. XXX
|
|
*/
|
|
case '\0': /* compat */
|
|
_funlockfile (fp);
|
|
return EOF;
|
|
|
|
default: /* compat */
|
|
if (isupper (c))
|
|
flags |= LONG;
|
|
c = CT_INT;
|
|
ccfn = (u_long (*)())_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 (flags & LONG)
|
|
{
|
|
if ((flags & SUPPRESS) == 0)
|
|
wcp = va_arg (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;
|
|
memset ((_PTR)&state, '\0', sizeof (mbstate_t));
|
|
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 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 ((_PTR) va_arg (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 = va_arg (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 (flags & LONG)
|
|
{
|
|
/* Process %S and %ls placeholders */
|
|
if ((flags & SUPPRESS) == 0)
|
|
wcp = va_arg (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;
|
|
memset ((_PTR)&state, '\0', sizeof (mbstate_t));
|
|
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 (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 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 = va_arg (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 & 2nd char */
|
|
case 'x':
|
|
case 'X':
|
|
if (flags & PFXOK && p == buf + 1)
|
|
{
|
|
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'.
|
|
*/
|
|
if (flags & NDIGITS)
|
|
{
|
|
if (p > buf)
|
|
_CAST_VOID ungetc (*(u_char *)-- p, fp);
|
|
goto match_failure;
|
|
}
|
|
c = ((u_char *) p)[-1];
|
|
if (c == 'x' || c == 'X')
|
|
{
|
|
--p;
|
|
/*(void)*/ ungetc (c, fp);
|
|
}
|
|
if ((flags & SUPPRESS) == 0)
|
|
{
|
|
u_long res;
|
|
|
|
*p = 0;
|
|
res = (*ccfn) (rptr, buf, (char **) NULL, base);
|
|
if (flags & POINTER)
|
|
*(va_arg (ap, _PTR *)) = (_PTR) (unsigned _POINTER_INT) res;
|
|
#ifdef _WANT_IO_C99_FORMATS
|
|
else if (flags & CHAR)
|
|
{
|
|
cp = va_arg (ap, char *);
|
|
*cp = res;
|
|
}
|
|
#endif
|
|
else if (flags & SHORT)
|
|
{
|
|
sp = va_arg (ap, short *);
|
|
*sp = res;
|
|
}
|
|
else if (flags & LONG)
|
|
{
|
|
lp = va_arg (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 = va_arg (ap, long long*);
|
|
*llp = resll;
|
|
}
|
|
#endif
|
|
else
|
|
{
|
|
ip = va_arg (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;
|
|
int nancount = 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 == 0)
|
|
{
|
|
flags &= ~(SIGNOK | NDIGITS);
|
|
goto fok;
|
|
}
|
|
break;
|
|
|
|
case '+':
|
|
case '-':
|
|
if (flags & SIGNOK)
|
|
{
|
|
flags &= ~SIGNOK;
|
|
goto fok;
|
|
}
|
|
break;
|
|
case 'n':
|
|
case 'N':
|
|
if (nancount == 0
|
|
&& (flags & (SIGNOK | NDIGITS | DPTOK | EXPOK)) ==
|
|
(SIGNOK | NDIGITS | DPTOK | EXPOK))
|
|
{
|
|
flags &= ~(SIGNOK | DPTOK | EXPOK | NDIGITS);
|
|
nancount = 1;
|
|
goto fok;
|
|
}
|
|
else if (nancount == 2)
|
|
{
|
|
nancount = 3;
|
|
goto fok;
|
|
}
|
|
break;
|
|
case 'a':
|
|
case 'A':
|
|
if (nancount == 1)
|
|
{
|
|
nancount = 2;
|
|
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 a 'Na' 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. */
|
|
if (nancount && nancount != 3)
|
|
{
|
|
/* Ok... what are we supposed to do in the event that the
|
|
__srefill call above was triggered in the middle of the partial
|
|
'NaN' and so we can't put it all back? */
|
|
while (nancount-- && (p > buf))
|
|
{
|
|
ungetc (*(u_char *)--p, fp);
|
|
--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 (*(u_char *)--p, fp);
|
|
--nread;
|
|
}
|
|
goto match_failure;
|
|
}
|
|
/* just a bad exponent (e and maybe sign) */
|
|
c = *(u_char *)-- p;
|
|
--nread;
|
|
if (c != 'e' && c != 'E')
|
|
{
|
|
_CAST_VOID ungetc (c, fp); /* sign */
|
|
c = *(u_char *)-- p;
|
|
--nread;
|
|
}
|
|
_CAST_VOID ungetc (c, fp);
|
|
}
|
|
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 = va_arg (ap, double *);
|
|
*dp = res;
|
|
}
|
|
else if (flags & LONGDBL)
|
|
{
|
|
ldp = va_arg (ap, _LONG_DOUBLE *);
|
|
*ldp = QUAD_RES;
|
|
}
|
|
else
|
|
{
|
|
flp = va_arg (ap, float *);
|
|
if (isnan (res))
|
|
*flp = nanf (NULL);
|
|
else
|
|
*flp = res;
|
|
}
|
|
nassigned++;
|
|
}
|
|
break;
|
|
}
|
|
#endif /* FLOATING_POINT */
|
|
}
|
|
}
|
|
input_failure:
|
|
_funlockfile (fp);
|
|
return nassigned ? nassigned : -1;
|
|
match_failure:
|
|
all_done:
|
|
_funlockfile (fp);
|
|
return nassigned;
|
|
}
|