PlaneteCasio
/
libc
1
0
Fork 0
Code Issues 6 Pull Requests Releases Wiki Activity
libc/newlib/libc/stdio/nano-vfprintf.c

669 lines
17 KiB
C
Raw Blame History

/*
* Copyright (c) 1990 The Regents of the University of California.
* All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* Chris Torek.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. 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.
* 3. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 THE REGENTS OR CONTRIBUTORS 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.
*/
/*
* Copyright (c) 2012-2014 ARM Ltd
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. 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.
* 3. The name of the company may not be used to endorse or promote
* products derived from this software without specific prior written
* permission.
*
* THIS SOFTWARE IS PROVIDED BY ARM LTD ``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 ARM LTD 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.
*/
/*
FUNCTION
<<vfprintf>>, <<vprintf>>, <<vsprintf>>, <<vsnprintf>>, <<vasprintf>>, <<vasnprintf>>---format argument list
INDEX
vfprintf
INDEX
_vfprintf_r
INDEX
vprintf
INDEX
_vprintf_r
INDEX
vsprintf
INDEX
_vsprintf_r
INDEX
vsnprintf
INDEX
_vsnprintf_r
INDEX
vasprintf
INDEX
_vasprintf_r
INDEX
vasnprintf
INDEX
_vasnprintf_r
SYNOPSIS
#include <stdio.h>
#include <stdarg.h>
int vprintf(const char *<[fmt]>, va_list <[list]>);
int vfprintf(FILE *<[fp]>, const char *<[fmt]>, va_list <[list]>);
int vsprintf(char *<[str]>, const char *<[fmt]>, va_list <[list]>);
int vsnprintf(char *<[str]>, size_t <[size]>, const char *<[fmt]>,
va_list <[list]>);
int vasprintf(char **<[strp]>, const char *<[fmt]>, va_list <[list]>);
char *vasnprintf(char *<[str]>, size_t *<[size]>, const char *<[fmt]>,
va_list <[list]>);
int _vprintf_r(struct _reent *<[reent]>, const char *<[fmt]>,
va_list <[list]>);
int _vfprintf_r(struct _reent *<[reent]>, FILE *<[fp]>,
const char *<[fmt]>, va_list <[list]>);
int _vsprintf_r(struct _reent *<[reent]>, char *<[str]>,
const char *<[fmt]>, va_list <[list]>);
int _vasprintf_r(struct _reent *<[reent]>, char **<[str]>,
const char *<[fmt]>, va_list <[list]>);
int _vsnprintf_r(struct _reent *<[reent]>, char *<[str]>,
size_t <[size]>, const char *<[fmt]>, va_list <[list]>);
char *_vasnprintf_r(struct _reent *<[reent]>, char *<[str]>,
size_t *<[size]>, const char *<[fmt]>, va_list <[list]>);
DESCRIPTION
<<vprintf>>, <<vfprintf>>, <<vasprintf>>, <<vsprintf>>, <<vsnprintf>>,
and <<vasnprintf>> are (respectively) variants of <<printf>>,
<<fprintf>>, <<asprintf>>, <<sprintf>>, <<snprintf>>, and
<<asnprintf>>. They differ only in allowing their caller to pass the
variable argument list as a <<va_list>> object (initialized by
<<va_start>>) rather than directly accepting a variable number of
arguments. The caller is responsible for calling <<va_end>>.
<<_vprintf_r>>, <<_vfprintf_r>>, <<_vasprintf_r>>, <<_vsprintf_r>>,
<<_vsnprintf_r>>, and <<_vasnprintf_r>> are reentrant versions of the
above.
RETURNS
The return values are consistent with the corresponding functions.
PORTABILITY
ANSI C requires <<vprintf>>, <<vfprintf>>, <<vsprintf>>, and
<<vsnprintf>>. The remaining functions are newlib extensions.
Supporting OS subroutines required: <<close>>, <<fstat>>, <<isatty>>,
<<lseek>>, <<read>>, <<sbrk>>, <<write>>.
*/
#if defined(LIBC_SCCS) && !defined(lint)
/*static char *sccsid = "from: @(#)vfprintf.c 5.50 (Berkeley) 12/16/92";*/
static char *rcsid = "$Id$";
#endif /* LIBC_SCCS and not lint */
/* Actual printf innards.
This code is large and complicated... */
#include <newlib.h>
#define VFPRINTF vfprintf
#ifdef STRING_ONLY
# define _VFPRINTF_R _svfprintf_r
#else
# define _VFPRINTF_R _vfprintf_r
#endif
#include <_ansi.h>
#include <reent.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <limits.h>
#include <stdint.h>
#include <wchar.h>
#include <sys/lock.h>
#include <stdarg.h>
#include "local.h"
#include "../stdlib/local.h"
#include "fvwrite.h"
#include "vfieeefp.h"
#include "nano-vfprintf_local.h"
/* GCC PR 14577 at https://gcc.gnu.org/bugzilla/show_bug.cgi?id=14557 */
#if __STDC_VERSION__ >= 201112L
#define va_ptr(ap) _Generic(&(ap), va_list *: &(ap), default: (va_list *)(ap))
#elif __GNUC__ >= 4
#define va_ptr(ap) __builtin_choose_expr(__builtin_types_compatible_p(__typeof__(&(ap)), va_list *), &(ap), (va_list *)(ap))
#else
#define va_ptr(ap) (sizeof(ap) == sizeof(va_list) ? (va_list *)&(ap) : (va_list *)(ap))
#endif
/* The __ssputs_r function is shared between all versions of vfprintf
and vfwprintf. */
#ifdef STRING_ONLY
int
__ssputs_r (struct _reent *ptr,
FILE *fp,
const char *buf,
size_t len)
{
register int w;
w = fp->_w;
if (len >= w && fp->_flags & (__SMBF | __SOPT))
{
/* Must be asprintf family. */
unsigned char *str;
int curpos = (fp->_p - fp->_bf._base);
/* Choose a geometric growth factor to avoid
* quadratic realloc behavior, but use a rate less
* than (1+sqrt(5))/2 to accomodate malloc
* overhead. asprintf EXPECTS us to overallocate, so
* that it can add a trailing \0 without
* reallocating. The new allocation should thus be
* max(prev_size*1.5, curpos+len+1). */
int newsize = fp->_bf._size * 3 / 2;
if (newsize < curpos + len + 1)
newsize = curpos + len + 1;
if (fp->_flags & __SOPT)
{
/* asnprintf leaves original buffer alone. */
str = (unsigned char *)_malloc_r (ptr, newsize);
if (!str)
{
ptr->_errno = ENOMEM;
goto err;
}
memcpy (str, fp->_bf._base, curpos);
fp->_flags = (fp->_flags & ~__SOPT) | __SMBF;
}
else
{
str = (unsigned char *)_realloc_r (ptr, fp->_bf._base, newsize);
if (!str)
{
/* Free unneeded buffer. */
_free_r (ptr, fp->_bf._base);
/* Ensure correct errno, even if free changed it. */
ptr->_errno = ENOMEM;
goto err;
}
}
fp->_bf._base = str;
fp->_p = str + curpos;
fp->_bf._size = newsize;
w = len;
fp->_w = newsize - curpos;
}
if (len < w)
w = len;
(void)memmove ((void *) fp->_p, (void *) buf, (size_t) (w));
fp->_w -= w;
fp->_p += w;
return 0;
err:
fp->_flags |= __SERR;
return EOF;
}
/* __ssprint_r is the original implementation of __SPRINT. In nano
version formatted IO it is reimplemented as __ssputs_r for non-wide
char output, but __ssprint_r cannot be discarded because it is used
by a serial of functions like svfwprintf for wide char output. */
int
__ssprint_r (struct _reent *ptr,
FILE *fp,
register struct __suio *uio)
{
register size_t len;
register int w;
register struct __siov *iov;
register const char *p = NULL;
iov = uio->uio_iov;
len = 0;
if (uio->uio_resid == 0)
{
uio->uio_iovcnt = 0;
return (0);
}
do
{
while (len == 0)
{
p = iov->iov_base;
len = iov->iov_len;
iov++;
}
w = fp->_w;
if (len >= w && fp->_flags & (__SMBF | __SOPT))
{
/* Must be asprintf family. */
unsigned char *str;
int curpos = (fp->_p - fp->_bf._base);
/* Choose a geometric growth factor to avoid
* quadratic realloc behavior, but use a rate less
* than (1+sqrt(5))/2 to accomodate malloc
* overhead. asprintf EXPECTS us to overallocate, so
* that it can add a trailing \0 without
* reallocating. The new allocation should thus be
* max(prev_size*1.5, curpos+len+1). */
int newsize = fp->_bf._size * 3 / 2;
if (newsize < curpos + len + 1)
newsize = curpos + len + 1;
if (fp->_flags & __SOPT)
{
/* asnprintf leaves original buffer alone. */
str = (unsigned char *)_malloc_r (ptr, newsize);
if (!str)
{
ptr->_errno = ENOMEM;
goto err;
}
memcpy (str, fp->_bf._base, curpos);
fp->_flags = (fp->_flags & ~__SOPT) | __SMBF;
}
else
{
str = (unsigned char *)_realloc_r (ptr, fp->_bf._base,
newsize);
if (!str)
{
/* Free unneeded buffer. */
_free_r (ptr, fp->_bf._base);
/* Ensure correct errno, even if free changed it. */
ptr->_errno = ENOMEM;
goto err;
}
}
fp->_bf._base = str;
fp->_p = str + curpos;
fp->_bf._size = newsize;
w = len;
fp->_w = newsize - curpos;
}
if (len < w)
w = len;
(void)memmove ((void *) fp->_p, (void *) p, (size_t) (w));
fp->_w -= w;
fp->_p += w;
/* Pretend we copied all. */
w = len;
p += w;
len -= w;
}
while ((uio->uio_resid -= w) != 0);
uio->uio_resid = 0;
uio->uio_iovcnt = 0;
return 0;
err:
fp->_flags |= __SERR;
uio->uio_resid = 0;
uio->uio_iovcnt = 0;
return EOF;
}
#else
/* As __ssputs_r, __sprint_r is used by output functions for wide char,
like vfwprint. */
/* Flush out all the vectors defined by the given uio,
then reset it so that it can be reused. */
int
__sprint_r (struct _reent *ptr,
FILE *fp,
register struct __suio *uio)
{
register int err = 0;
if (uio->uio_resid == 0)
{
uio->uio_iovcnt = 0;
return 0;
}
#ifdef _WIDE_ORIENT
if (fp->_flags2 & __SWID)
{
struct __siov *iov;
wchar_t *p;
int i, len;
iov = uio->uio_iov;
for (; uio->uio_resid != 0;
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);
out:
uio->uio_resid = 0;
uio->uio_iovcnt = 0;
return err;
}
_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. */
/* 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';
/* 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, 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, 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, _LONG_DOUBLE);
else
GET_ARG (N, ap, double);
}
else
{
n = _printf_float (data, &prt_data, fp, pfunc, va_ptr(ap));
}
}
else
#endif
n = _printf_i (data, &prt_data, fp, pfunc, va_ptr(ap));
if (n == -1)
goto error;
prt_data.ret += n;
}
done:
FLUSH ();
error:
#ifndef STRING_ONLY
_newlib_flockfile_end (fp);
#endif
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
Reference in New Issue View Git Blame Copy Permalink