Copy prerequisite file for "tiny" printf implementation
Use newlib/libc/stdio/nano-vfprintf.c as baseline for tiny-printf.c
This commit is contained in:
Jozef Lawrynowicz
Corinna Vinschen
parent
a2e81650d1
commit
2af6ad9f05
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@ -0,0 +1,661 @@
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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. 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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/*
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* Copyright (c) 2012-2014 ARM Ltd
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* All rights reserved.
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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. The name of the company may not be used to endorse or promote
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* products derived from this software without specific prior written
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* permission.
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*
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* THIS SOFTWARE IS PROVIDED BY ARM LTD ``AS IS'' AND ANY EXPRESS OR IMPLIED
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* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL ARM LTD BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
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* TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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/*
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FUNCTION
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<<vfprintf>>, <<vprintf>>, <<vsprintf>>, <<vsnprintf>>, <<vasprintf>>, <<vasnprintf>>---format argument list
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INDEX
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vfprintf
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INDEX
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_vfprintf_r
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INDEX
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vprintf
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INDEX
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_vprintf_r
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INDEX
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vsprintf
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INDEX
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_vsprintf_r
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INDEX
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vsnprintf
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INDEX
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_vsnprintf_r
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INDEX
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vasprintf
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INDEX
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_vasprintf_r
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INDEX
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vasnprintf
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INDEX
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_vasnprintf_r
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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 vsnprintf(char *<[str]>, size_t <[size]>, const char *<[fmt]>,
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va_list <[list]>);
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int vasprintf(char **<[strp]>, const char *<[fmt]>, va_list <[list]>);
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char *vasnprintf(char *<[str]>, size_t *<[size]>, const char *<[fmt]>,
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va_list <[list]>);
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int _vprintf_r(struct _reent *<[reent]>, const char *<[fmt]>,
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va_list <[list]>);
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int _vfprintf_r(struct _reent *<[reent]>, FILE *<[fp]>,
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const char *<[fmt]>, va_list <[list]>);
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int _vsprintf_r(struct _reent *<[reent]>, char *<[str]>,
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const char *<[fmt]>, va_list <[list]>);
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int _vasprintf_r(struct _reent *<[reent]>, char **<[str]>,
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const char *<[fmt]>, va_list <[list]>);
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int _vsnprintf_r(struct _reent *<[reent]>, char *<[str]>,
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size_t <[size]>, const char *<[fmt]>, va_list <[list]>);
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char *_vasnprintf_r(struct _reent *<[reent]>, char *<[str]>,
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size_t *<[size]>, const char *<[fmt]>, va_list <[list]>);
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DESCRIPTION
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<<vprintf>>, <<vfprintf>>, <<vasprintf>>, <<vsprintf>>, <<vsnprintf>>,
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and <<vasnprintf>> are (respectively) variants of <<printf>>,
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<<fprintf>>, <<asprintf>>, <<sprintf>>, <<snprintf>>, and
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<<asnprintf>>. They differ only in allowing their caller to pass the
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variable argument list as a <<va_list>> object (initialized by
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<<va_start>>) rather than directly accepting a variable number of
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arguments. The caller is responsible for calling <<va_end>>.
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<<_vprintf_r>>, <<_vfprintf_r>>, <<_vasprintf_r>>, <<_vsprintf_r>>,
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<<_vsnprintf_r>>, and <<_vasnprintf_r>> are reentrant versions of the
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above.
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RETURNS
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The return values are consistent with the corresponding functions.
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PORTABILITY
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ANSI C requires <<vprintf>>, <<vfprintf>>, <<vsprintf>>, and
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<<vsnprintf>>. The remaining functions are newlib extensions.
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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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#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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static char *rcsid = "$Id$";
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#endif /* LIBC_SCCS and not lint */
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/* Actual printf innards.
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This code is large and complicated... */
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#include <newlib.h>
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#define VFPRINTF vfprintf
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#ifdef STRING_ONLY
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# define _VFPRINTF_R _svfprintf_r
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#else
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# define _VFPRINTF_R _vfprintf_r
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#endif
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#include <_ansi.h>
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#include <reent.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 <stdint.h>
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#include <wchar.h>
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#include <sys/lock.h>
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#include <stdarg.h>
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#include "local.h"
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#include "../stdlib/local.h"
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#include "fvwrite.h"
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#include "vfieeefp.h"
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#include "nano-vfprintf_local.h"
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/* The __ssputs_r function is shared between all versions of vfprintf
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and vfwprintf. */
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#ifdef STRING_ONLY
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int
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__ssputs_r (struct _reent *ptr,
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FILE *fp,
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const char *buf,
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size_t len)
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{
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register int w;
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w = fp->_w;
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if (len >= w && fp->_flags & (__SMBF | __SOPT))
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{
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/* Must be asprintf family. */
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unsigned char *str;
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int curpos = (fp->_p - fp->_bf._base);
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/* Choose a geometric growth factor to avoid
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* quadratic realloc behavior, but use a rate less
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* than (1+sqrt(5))/2 to accomodate malloc
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* overhead. asprintf EXPECTS us to overallocate, so
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* that it can add a trailing \0 without
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* reallocating. The new allocation should thus be
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* max(prev_size*1.5, curpos+len+1). */
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int newsize = fp->_bf._size * 3 / 2;
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if (newsize < curpos + len + 1)
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newsize = curpos + len + 1;
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if (fp->_flags & __SOPT)
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{
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/* asnprintf leaves original buffer alone. */
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str = (unsigned char *)_malloc_r (ptr, newsize);
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if (!str)
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{
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ptr->_errno = ENOMEM;
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goto err;
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}
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memcpy (str, fp->_bf._base, curpos);
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fp->_flags = (fp->_flags & ~__SOPT) | __SMBF;
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}
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else
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{
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str = (unsigned char *)_realloc_r (ptr, fp->_bf._base, newsize);
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if (!str)
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{
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/* Free unneeded buffer. */
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_free_r (ptr, fp->_bf._base);
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/* Ensure correct errno, even if free changed it. */
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ptr->_errno = ENOMEM;
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goto err;
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}
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}
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fp->_bf._base = str;
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fp->_p = str + curpos;
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fp->_bf._size = newsize;
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w = len;
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fp->_w = newsize - curpos;
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}
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if (len < w)
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w = len;
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(void)memmove ((void *) fp->_p, (void *) buf, (size_t) (w));
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fp->_w -= w;
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fp->_p += w;
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return 0;
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err:
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fp->_flags |= __SERR;
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return EOF;
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}
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/* __ssprint_r is the original implementation of __SPRINT. In nano
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version formatted IO it is reimplemented as __ssputs_r for non-wide
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char output, but __ssprint_r cannot be discarded because it is used
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by a serial of functions like svfwprintf for wide char output. */
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int
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__ssprint_r (struct _reent *ptr,
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FILE *fp,
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register struct __suio *uio)
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{
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register size_t len;
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register int w;
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register struct __siov *iov;
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register const char *p = NULL;
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iov = uio->uio_iov;
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len = 0;
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if (uio->uio_resid == 0)
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{
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uio->uio_iovcnt = 0;
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return (0);
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}
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do
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{
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while (len == 0)
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{
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p = iov->iov_base;
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len = iov->iov_len;
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iov++;
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}
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w = fp->_w;
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if (len >= w && fp->_flags & (__SMBF | __SOPT))
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{
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/* Must be asprintf family. */
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unsigned char *str;
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int curpos = (fp->_p - fp->_bf._base);
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/* Choose a geometric growth factor to avoid
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* quadratic realloc behavior, but use a rate less
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* than (1+sqrt(5))/2 to accomodate malloc
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* overhead. asprintf EXPECTS us to overallocate, so
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* that it can add a trailing \0 without
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* reallocating. The new allocation should thus be
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* max(prev_size*1.5, curpos+len+1). */
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int newsize = fp->_bf._size * 3 / 2;
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if (newsize < curpos + len + 1)
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newsize = curpos + len + 1;
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if (fp->_flags & __SOPT)
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{
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/* asnprintf leaves original buffer alone. */
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str = (unsigned char *)_malloc_r (ptr, newsize);
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if (!str)
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{
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ptr->_errno = ENOMEM;
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goto err;
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}
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memcpy (str, fp->_bf._base, curpos);
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fp->_flags = (fp->_flags & ~__SOPT) | __SMBF;
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}
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else
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{
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str = (unsigned char *)_realloc_r (ptr, fp->_bf._base,
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newsize);
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if (!str)
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{
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/* Free unneeded buffer. */
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_free_r (ptr, fp->_bf._base);
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/* Ensure correct errno, even if free changed it. */
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ptr->_errno = ENOMEM;
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goto err;
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}
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}
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fp->_bf._base = str;
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fp->_p = str + curpos;
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fp->_bf._size = newsize;
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w = len;
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fp->_w = newsize - curpos;
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}
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if (len < w)
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w = len;
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(void)memmove ((void *) fp->_p, (void *) p, (size_t) (w));
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fp->_w -= w;
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fp->_p += w;
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/* Pretend we copied all. */
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w = len;
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p += w;
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len -= w;
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}
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while ((uio->uio_resid -= w) != 0);
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uio->uio_resid = 0;
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uio->uio_iovcnt = 0;
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return 0;
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err:
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fp->_flags |= __SERR;
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uio->uio_resid = 0;
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uio->uio_iovcnt = 0;
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return EOF;
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}
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#else
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/* As __ssputs_r, __sprint_r is used by output functions for wide char,
|
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like vfwprint. */
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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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int
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__sprint_r (struct _reent *ptr,
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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 = 0;
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|
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if (uio->uio_resid == 0)
|
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{
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uio->uio_iovcnt = 0;
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return 0;
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}
|
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#ifdef _WIDE_ORIENT
|
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if (fp->_flags2 & __SWID)
|
||||
{
|
||||
struct __siov *iov;
|
||||
wchar_t *p;
|
||||
int i, len;
|
||||
|
||||
iov = uio->uio_iov;
|
||||
for (; uio->uio_resid != 0;
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uio->uio_resid -= len * sizeof (wchar_t), iov++)
|
||||
{
|
||||
p = (wchar_t *) iov->iov_base;
|
||||
len = iov->iov_len / sizeof (wchar_t);
|
||||
for (i = 0; i < len; i++)
|
||||
{
|
||||
if (_fputwc_r (ptr, p[i], fp) == WEOF)
|
||||
{
|
||||
err = -1;
|
||||
goto out;
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
else
|
||||
#endif
|
||||
err = __sfvwrite_r(ptr, fp, uio);
|
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out:
|
||||
uio->uio_resid = 0;
|
||||
uio->uio_iovcnt = 0;
|
||||
return err;
|
||||
}
|
||||
|
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_NOINLINE_STATIC int
|
||||
__sfputc_r (struct _reent *ptr,
|
||||
int c,
|
||||
FILE *fp)
|
||||
{
|
||||
if (--fp->_w >= 0 || (fp->_w >= fp->_lbfsize && (char)c != '\n'))
|
||||
return (*fp->_p++ = c);
|
||||
else
|
||||
return (__swbuf_r(ptr, c, fp));
|
||||
}
|
||||
|
||||
int
|
||||
__sfputs_r (struct _reent *ptr,
|
||||
FILE *fp,
|
||||
const char *buf,
|
||||
size_t len)
|
||||
{
|
||||
register int i;
|
||||
|
||||
#ifdef _WIDE_ORIENT
|
||||
if (fp->_flags2 & __SWID)
|
||||
{
|
||||
wchar_t *p;
|
||||
|
||||
p = (wchar_t *) buf;
|
||||
for (i = 0; i < (len / sizeof (wchar_t)); i++)
|
||||
{
|
||||
if (_fputwc_r (ptr, p[i], fp) == WEOF)
|
||||
return -1;
|
||||
}
|
||||
}
|
||||
else
|
||||
#endif
|
||||
{
|
||||
for (i = 0; i < len; i++)
|
||||
{
|
||||
/* Call __sfputc_r to skip _fputc_r. */
|
||||
if (__sfputc_r (ptr, (int)buf[i], fp) == EOF)
|
||||
return -1;
|
||||
}
|
||||
}
|
||||
return (0);
|
||||
}
|
||||
#endif /* STRING_ONLY. */
|
||||
|
||||
int _VFPRINTF_R (struct _reent *, FILE *, const char *, va_list);
|
||||
|
||||
#ifndef STRING_ONLY
|
||||
int
|
||||
VFPRINTF (FILE * fp,
|
||||
const char *fmt0,
|
||||
va_list ap)
|
||||
{
|
||||
int result;
|
||||
result = _VFPRINTF_R (_REENT, fp, fmt0, ap);
|
||||
return result;
|
||||
}
|
||||
|
||||
int
|
||||
vfiprintf (FILE *, const char *, __VALIST)
|
||||
_ATTRIBUTE ((__alias__("vfprintf")));
|
||||
#endif
|
||||
|
||||
#ifdef STRING_ONLY
|
||||
# define __SPRINT __ssputs_r
|
||||
#else
|
||||
# define __SPRINT __sfputs_r
|
||||
#endif
|
||||
|
||||
/* Do not need FLUSH for all sprintf functions. */
|
||||
#ifdef STRING_ONLY
|
||||
# define FLUSH()
|
||||
#else
|
||||
# define FLUSH()
|
||||
#endif
|
||||
|
||||
int
|
||||
_VFPRINTF_R (struct _reent *data,
|
||||
FILE * fp,
|
||||
const char *fmt0,
|
||||
va_list ap)
|
||||
{
|
||||
register char *fmt; /* Format string. */
|
||||
register int n, m; /* Handy integers (short term usage). */
|
||||
register char *cp; /* Handy char pointer (short term usage). */
|
||||
const char *flag_chars;
|
||||
struct _prt_data_t prt_data; /* All data for decoding format string. */
|
||||
va_list ap_copy;
|
||||
|
||||
/* Output function pointer. */
|
||||
int (*pfunc)(struct _reent *, FILE *, const char *, size_t len);
|
||||
|
||||
pfunc = __SPRINT;
|
||||
|
||||
#ifndef STRING_ONLY
|
||||
/* Initialize std streams if not dealing with sprintf family. */
|
||||
CHECK_INIT (data, fp);
|
||||
_newlib_flockfile_start (fp);
|
||||
|
||||
/* Sorry, fprintf(read_only_file, "") returns EOF, not 0. */
|
||||
if (cantwrite (data, fp))
|
||||
{
|
||||
_newlib_flockfile_exit (fp);
|
||||
return (EOF);
|
||||
}
|
||||
|
||||
#else
|
||||
/* Create initial buffer if we are called by asprintf family. */
|
||||
if (fp->_flags & __SMBF && !fp->_bf._base)
|
||||
{
|
||||
fp->_bf._base = fp->_p = _malloc_r (data, 64);
|
||||
if (!fp->_p)
|
||||
{
|
||||
data->_errno = ENOMEM;
|
||||
return EOF;
|
||||
}
|
||||
fp->_bf._size = 64;
|
||||
}
|
||||
#endif
|
||||
|
||||
fmt = (char *)fmt0;
|
||||
prt_data.ret = 0;
|
||||
prt_data.blank = ' ';
|
||||
prt_data.zero = '0';
|
||||
|
||||
/* GCC PR 14577 at https://gcc.gnu.org/bugzilla/show_bug.cgi?id=14557 */
|
||||
va_copy (ap_copy, ap);
|
||||
|
||||
/* Scan the format for conversions (`%' character). */
|
||||
for (;;)
|
||||
{
|
||||
cp = fmt;
|
||||
while (*fmt != '\0' && *fmt != '%')
|
||||
fmt += 1;
|
||||
|
||||
if ((m = fmt - cp) != 0)
|
||||
{
|
||||
PRINT (cp, m);
|
||||
prt_data.ret += m;
|
||||
}
|
||||
if (*fmt == '\0')
|
||||
goto done;
|
||||
|
||||
fmt++; /* Skip over '%'. */
|
||||
|
||||
prt_data.flags = 0;
|
||||
prt_data.width = 0;
|
||||
prt_data.prec = -1;
|
||||
prt_data.dprec = 0;
|
||||
prt_data.l_buf[0] = '\0';
|
||||
#ifdef FLOATING_POINT
|
||||
prt_data.lead = 0;
|
||||
#endif
|
||||
/* The flags. */
|
||||
/*
|
||||
* ``Note that 0 is taken as a flag, not as the
|
||||
* beginning of a field width.''
|
||||
* -- ANSI X3J11
|
||||
*/
|
||||
flag_chars = "#-0+ ";
|
||||
for (; cp = memchr (flag_chars, *fmt, 5); fmt++)
|
||||
prt_data.flags |= (1 << (cp - flag_chars));
|
||||
|
||||
if (prt_data.flags & SPACESGN)
|
||||
prt_data.l_buf[0] = ' ';
|
||||
|
||||
/*
|
||||
* ``If the space and + flags both appear, the space
|
||||
* flag will be ignored.''
|
||||
* -- ANSI X3J11
|
||||
*/
|
||||
if (prt_data.flags & PLUSSGN)
|
||||
prt_data.l_buf[0] = '+';
|
||||
|
||||
/* The width. */
|
||||
if (*fmt == '*')
|
||||
{
|
||||
/*
|
||||
* ``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.
|
||||
*/
|
||||
prt_data.width = GET_ARG (n, ap_copy, int);
|
||||
if (prt_data.width < 0)
|
||||
{
|
||||
prt_data.width = -prt_data.width;
|
||||
prt_data.flags |= LADJUST;
|
||||
}
|
||||
fmt++;
|
||||
}
|
||||
else
|
||||
{
|
||||
for (; is_digit (*fmt); fmt++)
|
||||
prt_data.width = 10 * prt_data.width + to_digit (*fmt);
|
||||
}
|
||||
|
||||
/* The precision. */
|
||||
if (*fmt == '.')
|
||||
{
|
||||
fmt++;
|
||||
if (*fmt == '*')
|
||||
{
|
||||
fmt++;
|
||||
prt_data.prec = GET_ARG (n, ap_copy, int);
|
||||
if (prt_data.prec < 0)
|
||||
prt_data.prec = -1;
|
||||
}
|
||||
else
|
||||
{
|
||||
prt_data.prec = 0;
|
||||
for (; is_digit (*fmt); fmt++)
|
||||
prt_data.prec = 10 * prt_data.prec + to_digit (*fmt);
|
||||
}
|
||||
}
|
||||
|
||||
/* The length modifiers. */
|
||||
flag_chars = "hlL";
|
||||
if ((cp = memchr (flag_chars, *fmt, 3)) != NULL)
|
||||
{
|
||||
prt_data.flags |= (SHORTINT << (cp - flag_chars));
|
||||
fmt++;
|
||||
}
|
||||
|
||||
/* The conversion specifiers. */
|
||||
prt_data.code = *fmt++;
|
||||
cp = memchr ("efgEFG", prt_data.code, 6);
|
||||
#ifdef FLOATING_POINT
|
||||
/* If cp is not NULL, we are facing FLOATING POINT NUMBER. */
|
||||
if (cp)
|
||||
{
|
||||
/* Consume floating point argument if _printf_float is not
|
||||
linked. */
|
||||
if (_printf_float == NULL)
|
||||
{
|
||||
if (prt_data.flags & LONGDBL)
|
||||
GET_ARG (N, ap_copy, _LONG_DOUBLE);
|
||||
else
|
||||
GET_ARG (N, ap_copy, double);
|
||||
}
|
||||
else
|
||||
n = _printf_float (data, &prt_data, fp, pfunc, &ap_copy);
|
||||
}
|
||||
else
|
||||
#endif
|
||||
n = _printf_i (data, &prt_data, fp, pfunc, &ap_copy);
|
||||
|
||||
if (n == -1)
|
||||
goto error;
|
||||
|
||||
prt_data.ret += n;
|
||||
}
|
||||
done:
|
||||
FLUSH ();
|
||||
error:
|
||||
#ifndef STRING_ONLY
|
||||
_newlib_flockfile_end (fp);
|
||||
#endif
|
||||
va_end (ap_copy);
|
||||
return (__sferror (fp) ? EOF : prt_data.ret);
|
||||
}
|
||||
|
||||
#ifdef STRING_ONLY
|
||||
int
|
||||
_svfiprintf_r (struct _reent *, FILE *, const char *, __VALIST)
|
||||
_ATTRIBUTE ((__alias__("_svfprintf_r")));
|
||||
#else
|
||||
int
|
||||
_vfiprintf_r (struct _reent *, FILE *, const char *, __VALIST)
|
||||
_ATTRIBUTE ((__alias__("_vfprintf_r")));
|
||||
#endif
|
||||
Loading…
Reference in New Issue