1775 lines
46 KiB
C
1775 lines
46 KiB
C
/*
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FUNCTION
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<<vprintf>>, <<vfprintf>>, <<vsprintf>>---format argument list
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INDEX
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vprintf
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INDEX
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vfprintf
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INDEX
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vsprintf
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INDEX
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vsnprintf
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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 vprintf(const char *<[fmt]>, va_list <[list]>);
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int vfprintf(FILE *<[fp]>, const char *<[fmt]>, va_list <[list]>);
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int vsprintf(char *<[str]>, const char *<[fmt]>, va_list <[list]>);
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int vasprintf(char **<[strp]>, const char *<[fmt]>, va_list <[list]>);
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int vsnprintf(char *<[str]>, size_t <[size]>, const char *<[fmt]>, va_list <[list]>);
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int _vprintf_r(void *<[reent]>, const char *<[fmt]>,
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va_list <[list]>);
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int _vfprintf_r(void *<[reent]>, FILE *<[fp]>, const char *<[fmt]>,
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va_list <[list]>);
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int _vasprintf_r(void *<[reent]>, char **<[str]>, const char *<[fmt]>,
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va_list <[list]>);
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int _vsprintf_r(void *<[reent]>, char *<[str]>, const char *<[fmt]>,
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va_list <[list]>);
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int _vsnprintf_r(void *<[reent]>, char *<[str]>, size_t <[size]>, const char *<[fmt]>,
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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 vprintf( <[fmt]>, <[list]>)
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char *<[fmt]>;
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va_list <[list]>;
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int vfprintf(<[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 vasprintf(<[strp]>, <[fmt]>, <[list]>)
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char **<[strp]>;
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char *<[fmt]>;
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va_list <[list]>;
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int vsprintf(<[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 vsnprintf(<[str]>, <[size]>, <[fmt]>, <[list]>)
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char *<[str]>;
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size_t <[size]>;
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char *<[fmt]>;
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va_list <[list]>;
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int _vprintf_r(<[reent]>, <[fmt]>, <[list]>)
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char *<[reent]>;
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char *<[fmt]>;
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va_list <[list]>;
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int _vfprintf_r(<[reent]>, <[fp]>, <[fmt]>, <[list]>)
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char *<[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 _vasprintf_r(<[reent]>, <[strp]>, <[fmt]>, <[list]>)
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char *<[reent]>;
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char **<[strp]>;
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char *<[fmt]>;
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va_list <[list]>;
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int _vsprintf_r(<[reent]>, <[str]>, <[fmt]>, <[list]>)
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char *<[reent]>;
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char *<[str]>;
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char *<[fmt]>;
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va_list <[list]>;
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int _vsnprintf_r(<[reent]>, <[str]>, <[size]>, <[fmt]>, <[list]>)
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char *<[reent]>;
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char *<[str]>;
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size_t <[size]>;
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char *<[fmt]>;
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va_list <[list]>;
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DESCRIPTION
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<<vprintf>>, <<vfprintf>>, <<vasprintf>>, <<vsprintf>> and <<vsnprintf>> are
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(respectively) variants of <<printf>>, <<fprintf>>, <<asprintf>>, <<sprintf>>,
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and <<snprintf>>. They differ only in allowing their caller to pass the
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variable argument list as a <<va_list>> object (initialized by <<va_start>>)
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rather than 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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<<vasprintf>>/<<vsprintf>> returns the number of bytes in the output string,
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save that the concluding <<NULL>> is not counted.
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<<vprintf>> and <<vfprintf>> return the number of characters transmitted.
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If an error occurs, <<vprintf>> and <<vfprintf>> return <<EOF>> and
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<<vasprintf>> returns -1. No error returns occur for <<vsprintf>>.
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PORTABILITY
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ANSI C requires all three functions.
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Supporting OS subroutines required: <<close>>, <<fstat>>, <<isatty>>,
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<<lseek>>, <<read>>, <<sbrk>>, <<write>>.
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*/
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/*
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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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* This code is derived from software contributed to Berkeley by
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* Chris Torek.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#if defined(LIBC_SCCS) && !defined(lint)
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static char *sccsid = "from: @(#)vfprintf.c 5.50 (Berkeley) 12/16/92";
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#endif /* LIBC_SCCS and not lint */
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/*
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* Actual printf innards.
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*
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* This code is large and complicated...
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*/
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#ifdef INTEGER_ONLY
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#define VFPRINTF vfiprintf
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#define _VFPRINTF_R _vfiprintf_r
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#else
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#define VFPRINTF vfprintf
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#define _VFPRINTF_R _vfprintf_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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#define _NO_LONGLONG
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#if defined WANT_PRINTF_LONG_LONG && defined __GNUC__
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# undef _NO_LONGLONG
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#endif
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#define _NO_POS_ARGS
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#if defined WANT_IO_POS_ARGS
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# undef _NO_POS_ARGS
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#endif
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#include <_ansi.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <limits.h>
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#include <reent.h>
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#include <wchar.h>
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#include <string.h>
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#include <sys/lock.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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#ifndef _SMALL_PRINTF
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#include "local.h"
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#include "fvwrite.h"
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#else
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#define MAXBUFLOC 80
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#endif
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#include "vfieeefp.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_DBL && (LDBL_MANT_DIG > DBL_MANT_DIG)
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# undef _NO_LONGDBL
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#endif
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#ifndef _SMALL_PRINTF
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/*
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* Flush out all the vectors defined by the given uio,
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* then reset it so that it can be reused.
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*/
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static int
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__sprint(fp, uio)
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FILE *fp;
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register struct __suio *uio;
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{
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register int err;
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if (uio->uio_resid == 0) {
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uio->uio_iovcnt = 0;
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return (0);
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}
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err = __sfvwrite(fp, uio);
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uio->uio_resid = 0;
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uio->uio_iovcnt = 0;
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return (err);
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}
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/*
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* Helper function for `fprintf to unbuffered unix file': creates a
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* temporary buffer. We only work on write-only files; this avoids
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* worries about ungetc buffers and so forth.
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*/
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static int
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__sbprintf(fp, fmt, ap)
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register FILE *fp;
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const char *fmt;
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va_list ap;
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{
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int ret;
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FILE fake;
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unsigned char buf[BUFSIZ];
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/* copy the important variables */
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fake._flags = fp->_flags & ~__SNBF;
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fake._file = fp->_file;
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fake._cookie = fp->_cookie;
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fake._write = fp->_write;
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/* set up the buffer */
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fake._bf._base = fake._p = buf;
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fake._bf._size = fake._w = sizeof(buf);
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fake._lbfsize = 0; /* not actually used, but Just In Case */
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#ifndef __SINGLE_THREAD__
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__lock_init_recursive (*(_LOCK_RECURSIVE_T *)&fake._lock);
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#endif
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/* do the work, then copy any error status */
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ret = VFPRINTF(&fake, fmt, ap);
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if (ret >= 0 && fflush(&fake))
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ret = EOF;
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if (fake._flags & __SERR)
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fp->_flags |= __SERR;
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#ifndef __SINGLE_THREAD__
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__lock_close_recursive (*(_LOCK_RECURSIVE_T *)&fake._lock);
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#endif
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return (ret);
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}
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#endif
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#ifdef FLOATING_POINT
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#include <locale.h>
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#include <math.h>
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#include "floatio.h"
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#if ((MAXEXP+MAXFRACT+1) > MB_LEN_MAX)
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# define BUF (MAXEXP+MAXFRACT+1) /* + decimal point */
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#else
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# define BUF MB_LEN_MAX
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#endif
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#define DEFPREC 6
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#ifdef _NO_LONGDBL
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static char *cvt _PARAMS((struct _reent *, double, int, int, char *, int *, int, int *));
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#else
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static char *cvt _PARAMS((struct _reent *, _LONG_DOUBLE, int, int, char *, int *, int, int *));
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extern int _ldcheck _PARAMS((_LONG_DOUBLE *));
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#endif
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static int exponent _PARAMS((char *, int, int));
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#else /* no FLOATING_POINT */
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#define BUF 40
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#endif /* FLOATING_POINT */
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#ifndef _NO_LONGLONG
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#define quad_t long long
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#define u_quad_t unsigned long long
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#else
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#define quad_t long
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#define u_quad_t unsigned long
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#endif
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typedef quad_t * quad_ptr_t;
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typedef void * void_ptr_t;
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typedef char * char_ptr_t;
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typedef long * long_ptr_t;
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typedef int * int_ptr_t;
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typedef short * short_ptr_t;
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#ifndef _NO_POS_ARGS
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#define MAX_POS_ARGS 32
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union arg_val
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{
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int val_int;
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u_int val_u_int;
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long val_long;
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u_long val_u_long;
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float val_float;
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double val_double;
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_LONG_DOUBLE val__LONG_DOUBLE;
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int_ptr_t val_int_ptr_t;
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short_ptr_t val_short_ptr_t;
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long_ptr_t val_long_ptr_t;
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char_ptr_t val_char_ptr_t;
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quad_ptr_t val_quad_ptr_t;
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void_ptr_t val_void_ptr_t;
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quad_t val_quad_t;
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u_quad_t val_u_quad_t;
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wint_t val_wint_t;
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};
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static union arg_val *get_arg (struct _reent *data, int n, char *fmt,
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va_list *ap, int *numargs, union arg_val *args,
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int *arg_type, char **last_fmt);
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#endif /* !_NO_POS_ARGS */
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/*
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* Macros for converting digits to letters and vice versa
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*/
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#define to_digit(c) ((c) - '0')
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#define is_digit(c) ((unsigned)to_digit(c) <= 9)
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#define to_char(n) ((n) + '0')
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/*
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* Flags used during conversion.
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*/
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#define ALT 0x001 /* alternate form */
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#define HEXPREFIX 0x002 /* add 0x or 0X prefix */
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#define LADJUST 0x004 /* left adjustment */
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#define LONGDBL 0x008 /* long double */
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#define LONGINT 0x010 /* long integer */
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#ifndef _NO_LONGLONG
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#define QUADINT 0x020 /* quad integer */
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#else /* ifdef _NO_LONGLONG, make QUADINT equivalent to LONGINT, so
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that %lld behaves the same as %ld, not as %d, as expected if:
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sizeof (long long) = sizeof long > sizeof int */
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#define QUADINT LONGINT
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#endif
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#define SHORTINT 0x040 /* short integer */
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#define ZEROPAD 0x080 /* zero (as opposed to blank) pad */
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#define FPT 0x100 /* Floating point number */
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int _EXFUN (_VFPRINTF_R, (struct _reent *, FILE *, _CONST char *, va_list));
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int
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_DEFUN (VFPRINTF, (fp, fmt0, ap),
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FILE * fp _AND
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_CONST char *fmt0 _AND
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va_list ap)
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{
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int result;
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_flockfile(fp);
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#ifndef _SMALL_PRINTF
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CHECK_INIT (fp);
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#endif
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result = _VFPRINTF_R (_REENT, fp, fmt0, ap);
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_funlockfile(fp);
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return result;
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}
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int
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_DEFUN (_VFPRINTF_R, (data, fp, fmt0, ap),
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struct _reent *data _AND
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FILE * fp _AND
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_CONST char *fmt0 _AND
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va_list ap)
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{
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register char *fmt; /* format string */
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register int ch; /* character from fmt */
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register int n, m; /* handy integers (short term usage) */
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register char *cp; /* handy char pointer (short term usage) */
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register struct __siov *iovp;/* for PRINT macro */
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register int flags; /* flags as above */
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char *fmt_anchor; /* current format spec being processed */
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int N; /* arg number */
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int arg_index; /* index into args processed directly */
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#ifndef _NO_POS_ARGS
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int numargs; /* number of varargs read */
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char *saved_fmt; /* saved fmt pointer */
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union arg_val args[MAX_POS_ARGS];
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int arg_type[MAX_POS_ARGS];
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int is_pos_arg; /* is current format positional? */
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int old_is_pos_arg; /* is current format positional? */
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#endif
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int ret; /* return value accumulator */
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int width; /* width from format (%8d), or 0 */
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int prec; /* precision from format (%.3d), or -1 */
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char sign; /* sign prefix (' ', '+', '-', or \0) */
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#ifdef FLOATING_POINT
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#ifdef _SMALL_PRINTF
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char *decimal_point = ".";
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#else
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char *decimal_point = localeconv()->decimal_point;
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#endif
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char softsign; /* temporary negative sign for floats */
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#ifdef _NO_LONGDBL
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union { int i; double d; } _double_ = {0};
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#define _fpvalue (_double_.d)
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#else
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union { int i; _LONG_DOUBLE ld; } _long_double_ = {0};
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#define _fpvalue (_long_double_.ld)
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int tmp;
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#endif
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int expt; /* integer value of exponent */
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int expsize = 0; /* character count for expstr */
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int ndig; /* actual number of digits returned by cvt */
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char expstr[7]; /* buffer for exponent string */
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#endif
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u_quad_t _uquad; /* integer arguments %[diouxX] */
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enum { OCT, DEC, HEX } base;/* base for [diouxX] conversion */
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int dprec; /* a copy of prec if [diouxX], 0 otherwise */
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int realsz; /* field size expanded by dprec */
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int size; /* size of converted field or string */
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char *xdigs = NULL; /* digits for [xX] conversion */
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#ifndef _SMALL_PRINTF
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#define NIOV 8
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struct __suio uio; /* output information: summary */
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struct __siov iov[NIOV];/* ... and individual io vectors */
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char *malloc_buf = NULL;/* handy pointer for malloced buffers */
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#else
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char malloc_buf [MAXBUFLOC]; /* local buffers */
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#endif
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char buf[BUF]; /* space for %c, %[diouxX], %[eEfgG] */
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char ox[2]; /* space for 0x hex-prefix */
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#ifdef MB_CAPABLE
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wchar_t wc;
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mbstate_t state; /* mbtowc calls from library must not change state */
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#endif
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/*
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* Choose PADSIZE to trade efficiency vs. size. If larger printf
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* fields occur frequently, increase PADSIZE and make the initialisers
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* below longer.
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*/
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#define PADSIZE 16 /* pad chunk size */
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static _CONST char blanks[PADSIZE] =
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{' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' '};
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static _CONST char zeroes[PADSIZE] =
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{'0','0','0','0','0','0','0','0','0','0','0','0','0','0','0','0'};
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#ifdef MB_CAPABLE
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memset (&state, '\0', sizeof (state));
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#endif
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#ifndef _SMALL_PRINTF
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/*
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* BEWARE, these `goto error' on error, and PAD uses `n'.
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*/
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#define PRINT(ptr, len,f) { \
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iovp->iov_base = (ptr); \
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iovp->iov_len = (len); \
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uio.uio_resid += (len); \
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iovp++; \
|
|
if (++uio.uio_iovcnt >= NIOV) { \
|
|
if (__sprint(fp, &uio)) \
|
|
goto error; \
|
|
iovp = iov; \
|
|
} \
|
|
}
|
|
#define PAD(howmany, with,f) { \
|
|
if ((n = (howmany)) > 0) { \
|
|
while (n > PADSIZE) { \
|
|
PRINT(with, PADSIZE,f); \
|
|
n -= PADSIZE; \
|
|
} \
|
|
PRINT(with, n,f); \
|
|
} \
|
|
}
|
|
#define FLUSH() { \
|
|
if (uio.uio_resid && __sprint(fp, &uio)) \
|
|
goto error; \
|
|
uio.uio_iovcnt = 0; \
|
|
iovp = iov; \
|
|
}
|
|
#else
|
|
//Macros for _SMALL_PRINTF
|
|
void _SMALL_PRINTF_puts(const char *ptr, int len, FILE *f);
|
|
#define PRINT(ptr, len, f) {_SMALL_PRINTF_puts(ptr,len,f);}
|
|
#define PAD(howmany, with, f) { \
|
|
if ((n = (howmany)) > 0) { \
|
|
while (n > PADSIZE) { \
|
|
PRINT(with, PADSIZE,f); \
|
|
n -= PADSIZE; \
|
|
} \
|
|
PRINT(with, n, f); \
|
|
} \
|
|
}
|
|
#define FLUSH() { ; }
|
|
#endif
|
|
|
|
|
|
/* Macros to support positional arguments */
|
|
#ifndef _NO_POS_ARGS
|
|
#define GET_ARG(n, ap, type) \
|
|
( is_pos_arg \
|
|
? n < numargs \
|
|
? args[n].val_##type \
|
|
: get_arg (data, n, fmt_anchor, &ap, &numargs, args, arg_type, &saved_fmt)->val_##type \
|
|
: arg_index++ < numargs \
|
|
? args[n].val_##type \
|
|
: numargs < MAX_POS_ARGS \
|
|
? args[numargs++].val_##type = va_arg(ap, type) \
|
|
: va_arg(ap, type) \
|
|
)
|
|
#else
|
|
#define GET_ARG(n, ap, type) (va_arg(ap, type))
|
|
#endif
|
|
|
|
/*
|
|
* To extend shorts properly, we need both signed and unsigned
|
|
* argument extraction methods.
|
|
*/
|
|
#ifndef _NO_LONGLONG
|
|
#define SARG() \
|
|
(flags&QUADINT ? GET_ARG(N, ap, quad_t) : \
|
|
flags&LONGINT ? GET_ARG(N, ap, long) : \
|
|
flags&SHORTINT ? (long)(short)GET_ARG(N, ap, int) : \
|
|
(long)GET_ARG(N, ap, int))
|
|
#define UARG() \
|
|
(flags&QUADINT ? GET_ARG(N, ap, u_quad_t) : \
|
|
flags&LONGINT ? GET_ARG(N, ap, u_long) : \
|
|
flags&SHORTINT ? (u_long)(u_short)GET_ARG(N, ap, int) : \
|
|
(u_long)GET_ARG(N, ap, u_int))
|
|
#else
|
|
#define SARG() \
|
|
(flags&LONGINT ? GET_ARG(N, ap, long) : \
|
|
flags&SHORTINT ? (long)(short)GET_ARG(N, ap, int) : \
|
|
(long)GET_ARG(N, ap, int))
|
|
#define UARG() \
|
|
(flags&LONGINT ? GET_ARG(N, ap, u_long) : \
|
|
flags&SHORTINT ? (u_long)(u_short)GET_ARG(N, ap, int) : \
|
|
(u_long)GET_ARG(N, ap, u_int))
|
|
#endif
|
|
|
|
#ifndef _SMALL_PRINTF
|
|
/* sorry, fprintf(read_only_file, "") returns EOF, not 0 */
|
|
if (cantwrite(fp))
|
|
return (EOF);
|
|
|
|
/* optimise fprintf(stderr) (and other unbuffered Unix files) */
|
|
if ((fp->_flags & (__SNBF|__SWR|__SRW)) == (__SNBF|__SWR) &&
|
|
fp->_file >= 0)
|
|
return (__sbprintf(fp, fmt0, ap));
|
|
|
|
uio.uio_iov = iovp = iov;
|
|
uio.uio_resid = 0;
|
|
uio.uio_iovcnt = 0;
|
|
#endif
|
|
fmt = (char *)fmt0;
|
|
|
|
ret = 0;
|
|
arg_index = 0;
|
|
|
|
#ifndef _NO_POS_ARGS
|
|
saved_fmt = NULL;
|
|
arg_type[0] = -1;
|
|
numargs = 0;
|
|
is_pos_arg = 0;
|
|
#endif
|
|
|
|
/*
|
|
* Scan the format for conversions (`%' character).
|
|
*/
|
|
for (;;) {
|
|
cp = fmt;
|
|
#ifdef MB_CAPABLE
|
|
while ((n = _mbtowc_r(data, &wc, fmt, MB_CUR_MAX, &state)) > 0) {
|
|
if (wc == '%')
|
|
break;
|
|
fmt += n;
|
|
}
|
|
#else
|
|
while (*fmt != '\0' && *fmt != '%')
|
|
fmt += 1;
|
|
#endif
|
|
if ((m = fmt - cp) != 0) {
|
|
PRINT(cp, m, fp);
|
|
ret += m;
|
|
}
|
|
#ifdef MB_CAPABLE
|
|
if (n <= 0)
|
|
goto done;
|
|
#else
|
|
if (*fmt == '\0')
|
|
goto done;
|
|
#endif
|
|
fmt_anchor = fmt;
|
|
fmt++; /* skip over '%' */
|
|
|
|
flags = 0;
|
|
dprec = 0;
|
|
width = 0;
|
|
prec = -1;
|
|
sign = '\0';
|
|
N = arg_index;
|
|
#ifndef _NO_POS_ARGS
|
|
is_pos_arg = 0;
|
|
#endif
|
|
|
|
rflag: ch = *fmt++;
|
|
reswitch: switch (ch) {
|
|
case ' ':
|
|
/*
|
|
* ``If the space and + flags both appear, the space
|
|
* flag will be ignored.''
|
|
* -- ANSI X3J11
|
|
*/
|
|
if (!sign)
|
|
sign = ' ';
|
|
goto rflag;
|
|
case '#':
|
|
flags |= ALT;
|
|
goto rflag;
|
|
case '*':
|
|
n = N;
|
|
#ifndef _NO_POS_ARGS
|
|
/* we must check for positional arg used for dynamic width */
|
|
old_is_pos_arg = is_pos_arg;
|
|
is_pos_arg = 0;
|
|
if (is_digit(*fmt)) {
|
|
char *old_fmt = fmt;
|
|
|
|
n = 0;
|
|
ch = *fmt++;
|
|
do {
|
|
n = 10 * n + to_digit(ch);
|
|
ch = *fmt++;
|
|
} while (is_digit(ch));
|
|
|
|
if (ch == '$') {
|
|
if (n <= MAX_POS_ARGS) {
|
|
n -= 1;
|
|
is_pos_arg = 1;
|
|
}
|
|
else
|
|
goto error;
|
|
}
|
|
else {
|
|
fmt = old_fmt;
|
|
goto rflag;
|
|
}
|
|
}
|
|
#endif /* !_NO_POS_ARGS */
|
|
|
|
/*
|
|
* ``A negative field width argument is taken as a
|
|
* - flag followed by a positive field width.''
|
|
* -- ANSI X3J11
|
|
* They don't exclude field widths read from args.
|
|
*/
|
|
width = GET_ARG(n, ap, int);
|
|
#ifndef _NO_POS_ARGS
|
|
is_pos_arg = old_is_pos_arg;
|
|
#endif
|
|
if (width >= 0)
|
|
goto rflag;
|
|
width = -width;
|
|
/* FALLTHROUGH */
|
|
case '-':
|
|
flags |= LADJUST;
|
|
goto rflag;
|
|
case '+':
|
|
sign = '+';
|
|
goto rflag;
|
|
case '.':
|
|
if ((ch = *fmt++) == '*') {
|
|
n = N;
|
|
#ifndef _NO_POS_ARGS
|
|
/* we must check for positional arg used for dynamic width */
|
|
old_is_pos_arg = is_pos_arg;
|
|
is_pos_arg = 0;
|
|
if (is_digit(*fmt)) {
|
|
char *old_fmt = fmt;
|
|
|
|
n = 0;
|
|
ch = *fmt++;
|
|
do {
|
|
n = 10 * n + to_digit(ch);
|
|
ch = *fmt++;
|
|
} while (is_digit(ch));
|
|
|
|
if (ch == '$') {
|
|
if (n <= MAX_POS_ARGS) {
|
|
n -= 1;
|
|
is_pos_arg = 1;
|
|
}
|
|
else
|
|
goto error;
|
|
}
|
|
else {
|
|
fmt = old_fmt;
|
|
goto rflag;
|
|
}
|
|
}
|
|
#endif /* !_NO_POS_ARGS */
|
|
prec = GET_ARG(n, ap, int);
|
|
#ifndef _NO_POS_ARGS
|
|
is_pos_arg = old_is_pos_arg;
|
|
#endif
|
|
if (prec < 0)
|
|
prec = -1;
|
|
goto rflag;
|
|
}
|
|
n = 0;
|
|
while (is_digit(ch)) {
|
|
n = 10 * n + to_digit(ch);
|
|
ch = *fmt++;
|
|
}
|
|
prec = n < 0 ? -1 : n;
|
|
goto reswitch;
|
|
case '0':
|
|
/*
|
|
* ``Note that 0 is taken as a flag, not as the
|
|
* beginning of a field width.''
|
|
* -- ANSI X3J11
|
|
*/
|
|
flags |= ZEROPAD;
|
|
goto rflag;
|
|
case '1': case '2': case '3': case '4':
|
|
case '5': case '6': case '7': case '8': case '9':
|
|
n = 0;
|
|
do {
|
|
n = 10 * n + to_digit(ch);
|
|
ch = *fmt++;
|
|
} while (is_digit(ch));
|
|
#ifndef _NO_POS_ARGS
|
|
if (ch == '$') {
|
|
if (n <= MAX_POS_ARGS) {
|
|
N = n - 1;
|
|
is_pos_arg = 1;
|
|
goto rflag;
|
|
}
|
|
else
|
|
goto error;
|
|
}
|
|
#endif /* !_NO_POS_ARGS */
|
|
width = n;
|
|
goto reswitch;
|
|
#ifdef FLOATING_POINT
|
|
case 'L':
|
|
flags |= LONGDBL;
|
|
goto rflag;
|
|
#endif
|
|
case 'h':
|
|
flags |= SHORTINT;
|
|
goto rflag;
|
|
case 'l':
|
|
if (*fmt == 'l') {
|
|
fmt++;
|
|
flags |= QUADINT;
|
|
} else {
|
|
flags |= LONGINT;
|
|
}
|
|
goto rflag;
|
|
case 'q':
|
|
flags |= QUADINT;
|
|
goto rflag;
|
|
case 'c':
|
|
case 'C':
|
|
cp = buf;
|
|
if (ch == 'C' || (flags & LONGINT)) {
|
|
mbstate_t ps;
|
|
|
|
memset((void *)&ps, '\0', sizeof(mbstate_t));
|
|
if ((size = (int)_wcrtomb_r(data, cp,
|
|
(wchar_t)GET_ARG(N, ap, wint_t),
|
|
&ps)) == -1)
|
|
goto error;
|
|
}
|
|
else {
|
|
*cp = GET_ARG(N, ap, int);
|
|
size = 1;
|
|
}
|
|
sign = '\0';
|
|
break;
|
|
case 'D':
|
|
flags |= LONGINT;
|
|
/*FALLTHROUGH*/
|
|
case 'd':
|
|
case 'i':
|
|
_uquad = SARG();
|
|
#ifndef _NO_LONGLONG
|
|
if ((quad_t)_uquad < 0)
|
|
#else
|
|
if ((long) _uquad < 0)
|
|
#endif
|
|
{
|
|
|
|
_uquad = -_uquad;
|
|
sign = '-';
|
|
}
|
|
base = DEC;
|
|
goto number;
|
|
#ifdef FLOATING_POINT
|
|
case 'e':
|
|
case 'E':
|
|
case 'f':
|
|
case 'g':
|
|
case 'G':
|
|
if (prec == -1) {
|
|
prec = DEFPREC;
|
|
} else if ((ch == 'g' || ch == 'G') && prec == 0) {
|
|
prec = 1;
|
|
}
|
|
|
|
#ifdef _NO_LONGDBL
|
|
if (flags & LONGDBL) {
|
|
_fpvalue = (double) GET_ARG(N, ap, _LONG_DOUBLE);
|
|
} else {
|
|
_fpvalue = GET_ARG(N, ap, double);
|
|
}
|
|
|
|
/* do this before tricky precision changes */
|
|
if (isinf(_fpvalue)) {
|
|
if (_fpvalue < 0)
|
|
sign = '-';
|
|
cp = "Inf";
|
|
size = 3;
|
|
break;
|
|
}
|
|
if (isnan(_fpvalue)) {
|
|
cp = "NaN";
|
|
size = 3;
|
|
break;
|
|
}
|
|
|
|
#else /* !_NO_LONGDBL */
|
|
|
|
if (flags & LONGDBL) {
|
|
_fpvalue = GET_ARG(N, ap, _LONG_DOUBLE);
|
|
} else {
|
|
_fpvalue = (_LONG_DOUBLE)GET_ARG(N, ap, double);
|
|
}
|
|
|
|
/* do this before tricky precision changes */
|
|
tmp = _ldcheck (&_fpvalue);
|
|
if (tmp == 2) {
|
|
if (_fpvalue < 0)
|
|
sign = '-';
|
|
cp = "Inf";
|
|
size = 3;
|
|
break;
|
|
}
|
|
if (tmp == 1) {
|
|
cp = "NaN";
|
|
size = 3;
|
|
break;
|
|
}
|
|
#endif /* !_NO_LONGDBL */
|
|
|
|
flags |= FPT;
|
|
|
|
cp = cvt(data, _fpvalue, prec, flags, &softsign,
|
|
&expt, ch, &ndig);
|
|
|
|
if (ch == 'g' || ch == 'G') {
|
|
if (expt <= -4 || expt > prec)
|
|
ch = (ch == 'g') ? 'e' : 'E';
|
|
else
|
|
ch = 'g';
|
|
}
|
|
if (ch <= 'e') { /* 'e' or 'E' fmt */
|
|
--expt;
|
|
expsize = exponent(expstr, expt, ch);
|
|
size = expsize + ndig;
|
|
if (ndig > 1 || flags & ALT)
|
|
++size;
|
|
} else if (ch == 'f') { /* f fmt */
|
|
if (expt > 0) {
|
|
size = expt;
|
|
if (prec || flags & ALT)
|
|
size += prec + 1;
|
|
} else /* "0.X" */
|
|
size = (prec || flags & ALT)
|
|
? prec + 2
|
|
: 1;
|
|
} else if (expt >= ndig) { /* fixed g fmt */
|
|
size = expt;
|
|
if (flags & ALT)
|
|
++size;
|
|
} else
|
|
size = ndig + (expt > 0 ?
|
|
1 : 2 - expt);
|
|
|
|
if (softsign)
|
|
sign = '-';
|
|
break;
|
|
#endif /* FLOATING_POINT */
|
|
case 'n':
|
|
#ifndef _NO_LONGLONG
|
|
if (flags & QUADINT)
|
|
*GET_ARG(N, ap, quad_ptr_t) = ret;
|
|
else
|
|
#endif
|
|
if (flags & LONGINT)
|
|
*GET_ARG(N, ap, long_ptr_t) = ret;
|
|
else if (flags & SHORTINT)
|
|
*GET_ARG(N, ap, short_ptr_t) = ret;
|
|
else
|
|
*GET_ARG(N, ap, int_ptr_t) = ret;
|
|
continue; /* no output */
|
|
case 'O':
|
|
flags |= LONGINT;
|
|
/*FALLTHROUGH*/
|
|
case 'o':
|
|
_uquad = UARG();
|
|
base = OCT;
|
|
goto nosign;
|
|
case 'p':
|
|
/*
|
|
* ``The argument shall be a pointer to void. The
|
|
* value of the pointer is converted to a sequence
|
|
* of printable characters, in an implementation-
|
|
* defined manner.''
|
|
* -- ANSI X3J11
|
|
*/
|
|
/* NOSTRICT */
|
|
_uquad = (u_long)(unsigned _POINTER_INT)GET_ARG(N, ap, void_ptr_t);
|
|
base = HEX;
|
|
xdigs = "0123456789abcdef";
|
|
flags |= HEXPREFIX;
|
|
ch = 'x';
|
|
goto nosign;
|
|
case 's':
|
|
case 'S':
|
|
sign = '\0';
|
|
if ((cp = GET_ARG(N, ap, char_ptr_t)) == NULL) {
|
|
cp = "(null)";
|
|
size = 6;
|
|
}
|
|
else if (ch == 'S' || (flags & LONGINT)) {
|
|
mbstate_t ps;
|
|
_CONST wchar_t *wcp;
|
|
|
|
wcp = (_CONST wchar_t *)cp;
|
|
size = m = 0;
|
|
memset((void *)&ps, '\0', sizeof(mbstate_t));
|
|
|
|
/* Count number of bytes needed for multibyte
|
|
string that will be produced from widechar
|
|
string. */
|
|
if (prec >= 0) {
|
|
while (1) {
|
|
if (wcp[m] == L'\0')
|
|
break;
|
|
if ((n = (int)_wcrtomb_r(data,
|
|
buf, wcp[m], &ps)) == -1)
|
|
goto error;
|
|
if (n + size > prec)
|
|
break;
|
|
m += 1;
|
|
size += n;
|
|
if (size == prec)
|
|
break;
|
|
}
|
|
}
|
|
else {
|
|
if ((size = (int)_wcsrtombs_r(data,
|
|
NULL, &wcp, 0, &ps)) == -1)
|
|
goto error;
|
|
wcp = (_CONST wchar_t *)cp;
|
|
}
|
|
|
|
if (size == 0)
|
|
break;
|
|
|
|
#ifndef _SMALL_PRINTF
|
|
if ((malloc_buf =
|
|
(char *)_malloc_r(data, size + 1)) == NULL)
|
|
goto error;
|
|
#endif
|
|
|
|
/* Convert widechar string to multibyte string. */
|
|
memset((void *)&ps, '\0', sizeof(mbstate_t));
|
|
if (_wcsrtombs_r(data, malloc_buf, &wcp, size, &ps) != size)
|
|
goto error;
|
|
cp = malloc_buf;
|
|
cp[size] = '\0';
|
|
}
|
|
else if (prec >= 0) {
|
|
/*
|
|
* can't use strlen; can only look for the
|
|
* NUL in the first `prec' characters, and
|
|
* strlen() will go further.
|
|
*/
|
|
char *p = memchr(cp, 0, prec);
|
|
|
|
if (p != NULL) {
|
|
size = p - cp;
|
|
if (size > prec)
|
|
size = prec;
|
|
} else
|
|
size = prec;
|
|
} else
|
|
size = strlen(cp);
|
|
|
|
break;
|
|
case 'U':
|
|
flags |= LONGINT;
|
|
/*FALLTHROUGH*/
|
|
case 'u':
|
|
_uquad = UARG();
|
|
base = DEC;
|
|
goto nosign;
|
|
case 'X':
|
|
xdigs = "0123456789ABCDEF";
|
|
goto hex;
|
|
case 'x':
|
|
xdigs = "0123456789abcdef";
|
|
hex: _uquad = UARG();
|
|
base = HEX;
|
|
/* leading 0x/X only if non-zero */
|
|
if (flags & ALT && _uquad != 0)
|
|
flags |= HEXPREFIX;
|
|
|
|
/* unsigned conversions */
|
|
nosign: sign = '\0';
|
|
/*
|
|
* ``... diouXx conversions ... if a precision is
|
|
* specified, the 0 flag will be ignored.''
|
|
* -- ANSI X3J11
|
|
*/
|
|
number: if ((dprec = prec) >= 0)
|
|
flags &= ~ZEROPAD;
|
|
|
|
/*
|
|
* ``The result of converting a zero value with an
|
|
* explicit precision of zero is no characters.''
|
|
* -- ANSI X3J11
|
|
*/
|
|
cp = buf + BUF;
|
|
if (_uquad != 0 || prec != 0) {
|
|
/*
|
|
* Unsigned mod is hard, and unsigned mod
|
|
* by a constant is easier than that by
|
|
* a variable; hence this switch.
|
|
*/
|
|
switch (base) {
|
|
case OCT:
|
|
do {
|
|
*--cp = to_char(_uquad & 7);
|
|
_uquad >>= 3;
|
|
} while (_uquad);
|
|
/* handle octal leading 0 */
|
|
if (flags & ALT && *cp != '0')
|
|
*--cp = '0';
|
|
break;
|
|
|
|
case DEC:
|
|
/* many numbers are 1 digit */
|
|
while (_uquad >= 10) {
|
|
*--cp = to_char(_uquad % 10);
|
|
_uquad /= 10;
|
|
}
|
|
*--cp = to_char(_uquad);
|
|
break;
|
|
|
|
case HEX:
|
|
do {
|
|
*--cp = xdigs[_uquad & 15];
|
|
_uquad >>= 4;
|
|
} while (_uquad);
|
|
break;
|
|
|
|
default:
|
|
cp = "bug in vfprintf: bad base";
|
|
size = strlen(cp);
|
|
goto skipsize;
|
|
}
|
|
}
|
|
/*
|
|
* ...result is to be converted to an 'alternate form'.
|
|
* For o conversion, it increases the precision to force
|
|
* the first digit of the result to be a zero."
|
|
* -- ANSI X3J11
|
|
*
|
|
* To demonstrate this case, compile and run:
|
|
* printf ("%#.0o",0);
|
|
*/
|
|
else if (base == OCT && (flags & ALT))
|
|
*--cp = '0';
|
|
|
|
size = buf + BUF - cp;
|
|
skipsize:
|
|
break;
|
|
default: /* "%?" prints ?, unless ? is NUL */
|
|
if (ch == '\0')
|
|
goto done;
|
|
/* pretend it was %c with argument ch */
|
|
cp = buf;
|
|
*cp = ch;
|
|
size = 1;
|
|
sign = '\0';
|
|
break;
|
|
}
|
|
|
|
/*
|
|
* All reasonable formats wind up here. At this point, `cp'
|
|
* points to a string which (if not flags&LADJUST) should be
|
|
* padded out to `width' places. If flags&ZEROPAD, it should
|
|
* first be prefixed by any sign or other prefix; otherwise,
|
|
* it should be blank padded before the prefix is emitted.
|
|
* After any left-hand padding and prefixing, emit zeroes
|
|
* required by a decimal [diouxX] precision, then print the
|
|
* string proper, then emit zeroes required by any leftover
|
|
* floating precision; finally, if LADJUST, pad with blanks.
|
|
*
|
|
* Compute actual size, so we know how much to pad.
|
|
* size excludes decimal prec; realsz includes it.
|
|
*/
|
|
realsz = dprec > size ? dprec : size;
|
|
if (sign)
|
|
realsz++;
|
|
else if (flags & HEXPREFIX)
|
|
realsz+= 2;
|
|
|
|
/* right-adjusting blank padding */
|
|
if ((flags & (LADJUST|ZEROPAD)) == 0)
|
|
PAD(width - realsz, blanks, fp);
|
|
|
|
/* prefix */
|
|
if (sign) {
|
|
PRINT(&sign, 1, fp);
|
|
} else if (flags & HEXPREFIX) {
|
|
ox[0] = '0';
|
|
ox[1] = ch;
|
|
PRINT(ox, 2 ,fp);
|
|
}
|
|
|
|
/* right-adjusting zero padding */
|
|
if ((flags & (LADJUST|ZEROPAD)) == ZEROPAD)
|
|
PAD(width - realsz, zeroes, fp);
|
|
|
|
/* leading zeroes from decimal precision */
|
|
PAD(dprec - size, zeroes, fp);
|
|
|
|
/* the string or number proper */
|
|
#ifdef FLOATING_POINT
|
|
if ((flags & FPT) == 0) {
|
|
PRINT(cp, size, fp);
|
|
} else { /* glue together f_p fragments */
|
|
if (ch >= 'f') { /* 'f' or 'g' */
|
|
if (_fpvalue == 0) {
|
|
/* kludge for __dtoa irregularity */
|
|
PRINT("0", 1, fp);
|
|
if (expt < ndig || (flags & ALT) != 0) {
|
|
PRINT(decimal_point, 1, fp);
|
|
PAD(ndig - 1, zeroes, fp);
|
|
}
|
|
} else if (expt <= 0) {
|
|
PRINT("0", 1, fp);
|
|
if(expt || ndig) {
|
|
PRINT(decimal_point, 1, fp);
|
|
PAD(-expt, zeroes, fp);
|
|
PRINT(cp, ndig, fp);
|
|
}
|
|
} else if (expt >= ndig) {
|
|
PRINT(cp, ndig, fp);
|
|
PAD(expt - ndig, zeroes, fp);
|
|
if (flags & ALT)
|
|
PRINT(".", 1, fp);
|
|
} else {
|
|
PRINT(cp, expt, fp);
|
|
cp += expt;
|
|
PRINT(".", 1, fp);
|
|
PRINT(cp, ndig-expt, fp);
|
|
}
|
|
} else { /* 'e' or 'E' */
|
|
if (ndig > 1 || flags & ALT) {
|
|
ox[0] = *cp++;
|
|
ox[1] = '.';
|
|
PRINT(ox, 2, fp);
|
|
if (_fpvalue) {
|
|
PRINT(cp, ndig-1, fp);
|
|
} else /* 0.[0..] */
|
|
/* __dtoa irregularity */
|
|
PAD(ndig - 1, zeroes, fp);
|
|
} else /* XeYYY */
|
|
PRINT(cp, 1, fp);
|
|
PRINT(expstr, expsize, fp);
|
|
}
|
|
}
|
|
#else
|
|
PRINT(cp, size, fp);
|
|
#endif
|
|
/* left-adjusting padding (always blank) */
|
|
if (flags & LADJUST)
|
|
PAD(width - realsz, blanks, fp);
|
|
|
|
/* finally, adjust ret */
|
|
ret += width > realsz ? width : realsz;
|
|
|
|
FLUSH(); /* copy out the I/O vectors */
|
|
|
|
#ifndef _SMALL_PRINTF
|
|
if (malloc_buf != NULL) {
|
|
free(malloc_buf);
|
|
malloc_buf = NULL;
|
|
}
|
|
#endif
|
|
}
|
|
done:
|
|
FLUSH();
|
|
error:
|
|
|
|
#ifndef _SMALL_PRINTF
|
|
if (malloc_buf != NULL)
|
|
free(malloc_buf);
|
|
return (__sferror(fp) ? EOF : ret);
|
|
#else
|
|
return ret;
|
|
#endif
|
|
/* NOTREACHED */
|
|
}
|
|
|
|
#ifdef FLOATING_POINT
|
|
|
|
#ifdef _NO_LONGDBL
|
|
extern char *_dtoa_r _PARAMS((struct _reent *, double, int,
|
|
int, int *, int *, char **));
|
|
#else
|
|
extern char *_ldtoa_r _PARAMS((struct _reent *, _LONG_DOUBLE, int,
|
|
int, int *, int *, char **));
|
|
#undef word0
|
|
#define word0(x) ldword0(x)
|
|
#endif
|
|
|
|
static char *
|
|
cvt(data, value, ndigits, flags, sign, decpt, ch, length)
|
|
struct _reent *data;
|
|
#ifdef _NO_LONGDBL
|
|
double value;
|
|
#else
|
|
_LONG_DOUBLE value;
|
|
#endif
|
|
int ndigits, flags, *decpt, ch, *length;
|
|
char *sign;
|
|
{
|
|
int mode, dsgn;
|
|
char *digits, *bp, *rve;
|
|
#ifdef _NO_LONGDBL
|
|
union double_union tmp;
|
|
#else
|
|
struct ldieee *ldptr;
|
|
#endif
|
|
|
|
if (ch == 'f') {
|
|
mode = 3; /* ndigits after the decimal point */
|
|
} else {
|
|
/* To obtain ndigits after the decimal point for the 'e'
|
|
* and 'E' formats, round to ndigits + 1 significant
|
|
* figures.
|
|
*/
|
|
if (ch == 'e' || ch == 'E') {
|
|
ndigits++;
|
|
}
|
|
mode = 2; /* ndigits significant digits */
|
|
}
|
|
|
|
#ifdef _NO_LONGDBL
|
|
tmp.d = value;
|
|
|
|
if (word0(tmp) & Sign_bit) { /* this will check for < 0 and -0.0 */
|
|
value = -value;
|
|
*sign = '-';
|
|
} else
|
|
*sign = '\000';
|
|
|
|
digits = _dtoa_r(data, value, mode, ndigits, decpt, &dsgn, &rve);
|
|
#else /* !_NO_LONGDBL */
|
|
ldptr = (struct ldieee *)&value;
|
|
if (ldptr->sign) { /* this will check for < 0 and -0.0 */
|
|
value = -value;
|
|
*sign = '-';
|
|
} else
|
|
*sign = '\000';
|
|
|
|
digits = _ldtoa_r(data, value, mode, ndigits, decpt, &dsgn, &rve);
|
|
#endif /* !_NO_LONGDBL */
|
|
|
|
if ((ch != 'g' && ch != 'G') || flags & ALT) { /* Print trailing zeros */
|
|
bp = digits + ndigits;
|
|
if (ch == 'f') {
|
|
if (*digits == '0' && value)
|
|
*decpt = -ndigits + 1;
|
|
bp += *decpt;
|
|
}
|
|
if (value == 0) /* kludge for __dtoa irregularity */
|
|
rve = bp;
|
|
while (rve < bp)
|
|
*rve++ = '0';
|
|
}
|
|
*length = rve - digits;
|
|
return (digits);
|
|
}
|
|
|
|
static int
|
|
exponent(p0, exp, fmtch)
|
|
char *p0;
|
|
int exp, fmtch;
|
|
{
|
|
register char *p, *t;
|
|
char expbuf[40];
|
|
|
|
p = p0;
|
|
*p++ = fmtch;
|
|
if (exp < 0) {
|
|
exp = -exp;
|
|
*p++ = '-';
|
|
}
|
|
else
|
|
*p++ = '+';
|
|
t = expbuf + 40;
|
|
if (exp > 9) {
|
|
do {
|
|
*--t = to_char(exp % 10);
|
|
} while ((exp /= 10) > 9);
|
|
*--t = to_char(exp);
|
|
for (; t < expbuf + 40; *p++ = *t++);
|
|
}
|
|
else {
|
|
*p++ = '0';
|
|
*p++ = to_char(exp);
|
|
}
|
|
return (p - p0);
|
|
}
|
|
#endif /* FLOATING_POINT */
|
|
|
|
|
|
#ifndef _NO_POS_ARGS
|
|
|
|
/* Positional argument support.
|
|
Written by Jeff Johnston
|
|
|
|
Copyright (c) 2002 Red Hat Incorporated.
|
|
All rights reserved.
|
|
|
|
Redistribution and use in source and binary forms, with or without
|
|
modification, are permitted provided that the following conditions are met:
|
|
|
|
Redistributions of source code must retain the above copyright
|
|
notice, this list of conditions and the following disclaimer.
|
|
|
|
Redistributions in binary form must reproduce the above copyright
|
|
notice, this list of conditions and the following disclaimer in the
|
|
documentation and/or other materials provided with the distribution.
|
|
|
|
The name of Red Hat Incorporated may not be used to endorse
|
|
or promote products derived from this software without specific
|
|
prior written permission.
|
|
|
|
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
|
|
AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
|
|
DISCLAIMED. IN NO EVENT SHALL RED HAT INCORPORATED BE LIABLE FOR ANY
|
|
DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
|
|
(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
|
|
LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
|
|
ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
|
(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
|
|
SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */
|
|
|
|
typedef enum {
|
|
ZERO, /* '0' */
|
|
DIGIT, /* '1-9' */
|
|
DOLLAR, /* '$' */
|
|
MODFR, /* spec modifier */
|
|
SPEC, /* format specifier */
|
|
DOT, /* '.' */
|
|
STAR, /* '*' */
|
|
FLAG, /* format flag */
|
|
OTHER, /* all other chars */
|
|
MAX_CH_CLASS /* place-holder */
|
|
} CH_CLASS;
|
|
|
|
typedef enum {
|
|
START, /* start */
|
|
SFLAG, /* seen a flag */
|
|
WDIG, /* seen digits in width area */
|
|
WIDTH, /* processed width */
|
|
SMOD, /* seen spec modifier */
|
|
SDOT, /* seen dot */
|
|
VARW, /* have variable width specifier */
|
|
VARP, /* have variable precision specifier */
|
|
PREC, /* processed precision */
|
|
VWDIG, /* have digits in variable width specification */
|
|
VPDIG, /* have digits in variable precision specification */
|
|
DONE, /* done */
|
|
MAX_STATE, /* place-holder */
|
|
} STATE;
|
|
|
|
typedef enum {
|
|
NOOP, /* do nothing */
|
|
NUMBER, /* build a number from digits */
|
|
SKIPNUM, /* skip over digits */
|
|
GETMOD, /* get and process format modifier */
|
|
GETARG, /* get and process argument */
|
|
GETPW, /* get variable precision or width */
|
|
GETPWB, /* get variable precision or width and pushback fmt char */
|
|
GETPOS, /* get positional parameter value */
|
|
PWPOS, /* get positional parameter value for variable width or precision */
|
|
} ACTION;
|
|
|
|
const static CH_CLASS chclass[256] = {
|
|
/* 00-07 */ OTHER, OTHER, OTHER, OTHER, OTHER, OTHER, OTHER, OTHER,
|
|
/* 08-0f */ OTHER, OTHER, OTHER, OTHER, OTHER, OTHER, OTHER, OTHER,
|
|
/* 10-17 */ OTHER, OTHER, OTHER, OTHER, OTHER, OTHER, OTHER, OTHER,
|
|
/* 18-1f */ OTHER, OTHER, OTHER, OTHER, OTHER, OTHER, OTHER, OTHER,
|
|
/* 20-27 */ FLAG, OTHER, OTHER, FLAG, DOLLAR, OTHER, OTHER, OTHER,
|
|
/* 28-2f */ OTHER, OTHER, STAR, FLAG, OTHER, FLAG, DOT, OTHER,
|
|
/* 30-37 */ ZERO, DIGIT, DIGIT, DIGIT, DIGIT, DIGIT, DIGIT, DIGIT,
|
|
/* 38-3f */ DIGIT, DIGIT, OTHER, OTHER, OTHER, OTHER, OTHER, OTHER,
|
|
/* 40-47 */ OTHER, OTHER, OTHER, SPEC, SPEC, SPEC, OTHER, SPEC,
|
|
/* 48-4f */ OTHER, OTHER, OTHER, OTHER, MODFR, OTHER, OTHER, SPEC,
|
|
/* 50-57 */ OTHER, OTHER, OTHER, SPEC, OTHER, SPEC, OTHER, SPEC,
|
|
/* 58-5f */ OTHER, OTHER, OTHER, OTHER, OTHER, OTHER, OTHER, OTHER,
|
|
/* 60-67 */ OTHER, OTHER, OTHER, SPEC, SPEC, SPEC, SPEC, SPEC,
|
|
/* 68-6f */ MODFR, SPEC, OTHER, OTHER, MODFR, OTHER, OTHER, SPEC,
|
|
/* 70-77 */ SPEC, MODFR, OTHER, SPEC, OTHER, SPEC, OTHER, OTHER,
|
|
/* 78-7f */ SPEC, OTHER, OTHER, OTHER, OTHER, OTHER, OTHER, OTHER,
|
|
/* 80-87 */ OTHER, OTHER, OTHER, OTHER, OTHER, OTHER, OTHER, OTHER,
|
|
/* 88-8f */ OTHER, OTHER, OTHER, OTHER, OTHER, OTHER, OTHER, OTHER,
|
|
/* 90-97 */ OTHER, OTHER, OTHER, OTHER, OTHER, OTHER, OTHER, OTHER,
|
|
/* 98-9f */ OTHER, OTHER, OTHER, OTHER, OTHER, OTHER, OTHER, OTHER,
|
|
/* a0-a7 */ OTHER, OTHER, OTHER, OTHER, OTHER, OTHER, OTHER, OTHER,
|
|
/* a8-af */ OTHER, OTHER, OTHER, OTHER, OTHER, OTHER, OTHER, OTHER,
|
|
/* b0-b7 */ OTHER, OTHER, OTHER, OTHER, OTHER, OTHER, OTHER, OTHER,
|
|
/* b8-bf */ OTHER, OTHER, OTHER, OTHER, OTHER, OTHER, OTHER, OTHER,
|
|
/* c0-c7 */ OTHER, OTHER, OTHER, OTHER, OTHER, OTHER, OTHER, OTHER,
|
|
/* c8-cf */ OTHER, OTHER, OTHER, OTHER, OTHER, OTHER, OTHER, OTHER,
|
|
/* d0-d7 */ OTHER, OTHER, OTHER, OTHER, OTHER, OTHER, OTHER, OTHER,
|
|
/* d8-df */ OTHER, OTHER, OTHER, OTHER, OTHER, OTHER, OTHER, OTHER,
|
|
/* e0-e7 */ OTHER, OTHER, OTHER, OTHER, OTHER, OTHER, OTHER, OTHER,
|
|
/* e8-ef */ OTHER, OTHER, OTHER, OTHER, OTHER, OTHER, OTHER, OTHER,
|
|
/* f0-f7 */ OTHER, OTHER, OTHER, OTHER, OTHER, OTHER, OTHER, OTHER,
|
|
/* f8-ff */ OTHER, OTHER, OTHER, OTHER, OTHER, OTHER, OTHER, OTHER,
|
|
};
|
|
|
|
const static STATE state_table[MAX_STATE][MAX_CH_CLASS] = {
|
|
/* '0' '1-9' '$' MODFR SPEC '.' '*' FLAG OTHER */
|
|
/* START */ { SFLAG, WDIG, DONE, SMOD, DONE, SDOT, VARW, SFLAG, DONE },
|
|
/* SFLAG */ { SFLAG, WDIG, DONE, SMOD, DONE, SDOT, VARW, SFLAG, DONE },
|
|
/* WDIG */ { DONE, DONE, WIDTH, SMOD, DONE, SDOT, DONE, DONE, DONE },
|
|
/* WIDTH */ { DONE, DONE, DONE, SMOD, DONE, SDOT, DONE, DONE, DONE },
|
|
/* SMOD */ { DONE, DONE, DONE, DONE, DONE, DONE, DONE, DONE, DONE },
|
|
/* SDOT */ { SDOT, PREC, DONE, SMOD, DONE, DONE, VARP, DONE, DONE },
|
|
/* VARW */ { DONE, VWDIG, DONE, SMOD, DONE, SDOT, DONE, DONE, DONE },
|
|
/* VARP */ { DONE, VPDIG, DONE, SMOD, DONE, DONE, DONE, DONE, DONE },
|
|
/* PREC */ { DONE, DONE, DONE, SMOD, DONE, DONE, DONE, DONE, DONE },
|
|
/* VWDIG */ { DONE, DONE, WIDTH, DONE, DONE, DONE, DONE, DONE, DONE },
|
|
/* VPDIG */ { DONE, DONE, PREC, DONE, DONE, DONE, DONE, DONE, DONE },
|
|
};
|
|
|
|
const static ACTION action_table[MAX_STATE][MAX_CH_CLASS] = {
|
|
/* '0' '1-9' '$' MODFR SPEC '.' '*' FLAG OTHER */
|
|
/* START */ { NOOP, NUMBER, NOOP, GETMOD, GETARG, NOOP, NOOP, NOOP, NOOP },
|
|
/* SFLAG */ { NOOP, NUMBER, NOOP, GETMOD, GETARG, NOOP, NOOP, NOOP, NOOP },
|
|
/* WDIG */ { NOOP, NOOP, GETPOS, GETMOD, GETARG, NOOP, NOOP, NOOP, NOOP },
|
|
/* WIDTH */ { NOOP, NOOP, NOOP, GETMOD, GETARG, NOOP, NOOP, NOOP, NOOP },
|
|
/* SMOD */ { NOOP, NOOP, NOOP, NOOP, GETARG, NOOP, NOOP, NOOP, NOOP },
|
|
/* SDOT */ { NOOP, SKIPNUM, NOOP, GETMOD, GETARG, NOOP, NOOP, NOOP, NOOP },
|
|
/* VARW */ { NOOP, NUMBER, NOOP, GETPW, GETPWB, GETPW, NOOP, NOOP, NOOP },
|
|
/* VARP */ { NOOP, NUMBER, NOOP, GETPW, GETPWB, NOOP, NOOP, NOOP, NOOP },
|
|
/* PREC */ { NOOP, NOOP, NOOP, GETMOD, GETARG, NOOP, NOOP, NOOP, NOOP },
|
|
/* VWDIG */ { NOOP, NOOP, PWPOS, NOOP, NOOP, NOOP, NOOP, NOOP, NOOP },
|
|
/* VPDIG */ { NOOP, NOOP, PWPOS, NOOP, NOOP, NOOP, NOOP, NOOP, NOOP },
|
|
};
|
|
|
|
/* function to get positional parameter N where n = N - 1 */
|
|
static union arg_val *
|
|
get_arg (struct _reent *data, int n, char *fmt, va_list *ap,
|
|
int *numargs_p, union arg_val *args,
|
|
int *arg_type, char **last_fmt)
|
|
{
|
|
int ch;
|
|
int number, flags;
|
|
int spec_type;
|
|
int numargs = *numargs_p;
|
|
CH_CLASS chtype;
|
|
STATE state, next_state;
|
|
ACTION action;
|
|
int pos, last_arg;
|
|
int max_pos_arg = n;
|
|
enum types { INT, LONG_INT, SHORT_INT, QUAD_INT, CHAR, CHAR_PTR, DOUBLE, LONG_DOUBLE, WIDE_CHAR };
|
|
#ifdef MB_CAPABLE
|
|
wchar_t wc;
|
|
mbstate_t wc_state;
|
|
int nbytes;
|
|
#endif
|
|
|
|
/* if this isn't the first call, pick up where we left off last time */
|
|
if (*last_fmt != NULL)
|
|
fmt = *last_fmt;
|
|
|
|
#ifdef MB_CAPABLE
|
|
memset (&wc_state, '\0', sizeof (wc_state));
|
|
#endif
|
|
|
|
/* we need to process either to end of fmt string or until we have actually
|
|
read the desired parameter from the vararg list. */
|
|
while (*fmt && n >= numargs)
|
|
{
|
|
#ifdef MB_CAPABLE
|
|
while ((nbytes = _mbtowc_r(data, &wc, fmt, MB_CUR_MAX, &wc_state)) > 0)
|
|
{
|
|
fmt += nbytes;
|
|
if (wc == '%')
|
|
break;
|
|
}
|
|
|
|
if (nbytes <= 0)
|
|
break;
|
|
#else
|
|
while (*fmt != '\0' && *fmt != '%')
|
|
fmt += 1;
|
|
|
|
if (*fmt == '\0')
|
|
break;
|
|
#endif
|
|
state = START;
|
|
flags = 0;
|
|
pos = -1;
|
|
number = 0;
|
|
spec_type = INT;
|
|
|
|
/* Use state/action table to process format specifiers. We ignore invalid
|
|
formats and we are only interested in information that tells us how to
|
|
read the vararg list. */
|
|
while (state != DONE)
|
|
{
|
|
ch = *fmt++;
|
|
chtype = chclass[ch];
|
|
next_state = state_table[state][chtype];
|
|
action = action_table[state][chtype];
|
|
state = next_state;
|
|
|
|
switch (action)
|
|
{
|
|
case GETMOD: /* we have format modifier */
|
|
switch (ch)
|
|
{
|
|
case 'h':
|
|
flags |= SHORTINT;
|
|
break;
|
|
case 'L':
|
|
flags |= LONGDBL;
|
|
break;
|
|
case 'q':
|
|
flags |= QUADINT;
|
|
break;
|
|
case 'l':
|
|
default:
|
|
if (*fmt == 'l')
|
|
{
|
|
flags |= QUADINT;
|
|
++fmt;
|
|
}
|
|
else
|
|
flags |= LONGINT;
|
|
break;
|
|
}
|
|
break;
|
|
case GETARG: /* we have format specifier */
|
|
{
|
|
numargs &= (MAX_POS_ARGS - 1);
|
|
/* process the specifier and translate it to a type to fetch from varargs */
|
|
switch (ch)
|
|
{
|
|
case 'd':
|
|
case 'i':
|
|
case 'o':
|
|
case 'x':
|
|
case 'X':
|
|
case 'u':
|
|
if (flags & LONGINT)
|
|
spec_type = LONG_INT;
|
|
else if (flags & SHORTINT)
|
|
spec_type = SHORT_INT;
|
|
#ifndef _NO_LONGLONG
|
|
else if (flags & QUADINT)
|
|
spec_type = QUAD_INT;
|
|
#endif
|
|
else
|
|
spec_type = INT;
|
|
break;
|
|
case 'D':
|
|
case 'U':
|
|
case 'O':
|
|
spec_type = LONG_INT;
|
|
break;
|
|
case 'f':
|
|
case 'g':
|
|
case 'G':
|
|
case 'E':
|
|
case 'e':
|
|
#ifndef _NO_LONGDBL
|
|
if (flags & LONGDBL)
|
|
spec_type = LONG_DOUBLE;
|
|
else
|
|
#endif
|
|
spec_type = DOUBLE;
|
|
break;
|
|
case 's':
|
|
case 'S':
|
|
case 'p':
|
|
spec_type = CHAR_PTR;
|
|
break;
|
|
case 'c':
|
|
spec_type = CHAR;
|
|
break;
|
|
case 'C':
|
|
spec_type = WIDE_CHAR;
|
|
break;
|
|
}
|
|
|
|
/* if we have a positional parameter, just store the type, otherwise
|
|
fetch the parameter from the vararg list */
|
|
if (pos != -1)
|
|
arg_type[pos] = spec_type;
|
|
else
|
|
{
|
|
switch (spec_type)
|
|
{
|
|
case LONG_INT:
|
|
args[numargs++].val_long = va_arg(*ap, long);
|
|
break;
|
|
case QUAD_INT:
|
|
args[numargs++].val_quad_t = va_arg(*ap, quad_t);
|
|
break;
|
|
case WIDE_CHAR:
|
|
args[numargs++].val_wint_t = va_arg(*ap, wint_t);
|
|
break;
|
|
case CHAR:
|
|
case SHORT_INT:
|
|
case INT:
|
|
args[numargs++].val_int = va_arg(*ap, int);
|
|
break;
|
|
case CHAR_PTR:
|
|
args[numargs++].val_char_ptr_t = va_arg(*ap, char *);
|
|
break;
|
|
case DOUBLE:
|
|
args[numargs++].val_double = va_arg(*ap, double);
|
|
break;
|
|
case LONG_DOUBLE:
|
|
args[numargs++].val__LONG_DOUBLE = va_arg(*ap, _LONG_DOUBLE);
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
break;
|
|
case GETPOS: /* we have positional specifier */
|
|
if (arg_type[0] == -1)
|
|
memset (arg_type, 0, sizeof(int) * MAX_POS_ARGS);
|
|
pos = number - 1;
|
|
max_pos_arg = (max_pos_arg > pos ? max_pos_arg : pos);
|
|
break;
|
|
case PWPOS: /* we have positional specifier for width or precision */
|
|
if (arg_type[0] == -1)
|
|
memset (arg_type, 0, sizeof(int) * MAX_POS_ARGS);
|
|
number -= 1;
|
|
arg_type[number] = INT;
|
|
max_pos_arg = (max_pos_arg > number ? max_pos_arg : number);
|
|
break;
|
|
case GETPWB: /* we require format pushback */
|
|
--fmt;
|
|
/* fallthrough */
|
|
case GETPW: /* we have a variable precision or width to acquire */
|
|
args[numargs++].val_int = va_arg(*ap, int);
|
|
break;
|
|
case NUMBER: /* we have a number to process */
|
|
number = (ch - '0');
|
|
while ((ch = *fmt) != '\0' && is_digit(ch))
|
|
{
|
|
number = number * 10 + (ch - '0');
|
|
++fmt;
|
|
}
|
|
break;
|
|
case SKIPNUM: /* we have a number to skip */
|
|
while ((ch = *fmt) != '\0' && is_digit(ch))
|
|
++fmt;
|
|
break;
|
|
case NOOP:
|
|
default:
|
|
break; /* do nothing */
|
|
}
|
|
}
|
|
}
|
|
|
|
/* process all arguments up to at least the one we are looking for and if we
|
|
have seen the end of the string, then process up to the max argument needed */
|
|
if (*fmt == '\0')
|
|
last_arg = max_pos_arg;
|
|
else
|
|
last_arg = n;
|
|
|
|
while (numargs <= last_arg)
|
|
{
|
|
switch (arg_type[numargs])
|
|
{
|
|
case LONG_INT:
|
|
args[numargs++].val_long = va_arg(*ap, long);
|
|
break;
|
|
case QUAD_INT:
|
|
args[numargs++].val_quad_t = va_arg(*ap, quad_t);
|
|
break;
|
|
case CHAR_PTR:
|
|
args[numargs++].val_char_ptr_t = va_arg(*ap, char *);
|
|
break;
|
|
case DOUBLE:
|
|
args[numargs++].val_double = va_arg(*ap, double);
|
|
break;
|
|
case LONG_DOUBLE:
|
|
args[numargs++].val__LONG_DOUBLE = va_arg(*ap, _LONG_DOUBLE);
|
|
break;
|
|
case WIDE_CHAR:
|
|
args[numargs++].val_wint_t = va_arg(*ap, wint_t);
|
|
break;
|
|
case INT:
|
|
case SHORT_INT:
|
|
case CHAR:
|
|
default:
|
|
args[numargs++].val_int = va_arg(*ap, int);
|
|
break;
|
|
}
|
|
}
|
|
|
|
/* alter the global numargs value and keep a reference to the last bit of the fmt
|
|
string we processed here because the caller will continue processing where we started */
|
|
*numargs_p = numargs;
|
|
*last_fmt = fmt;
|
|
return &args[n];
|
|
}
|
|
#endif /* !_NO_POS_ARGS */
|