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Implement reduced code size "tiny" printf and puts 

"tiny" printf is derived from _vfprintf_r in libc/stdio/nano-vfprintf.c.
"tiny" puts has been implemented so that it just calls write, without
any other processing.
Support for buffering, reentrancy and streams has been removed from
these functions to achieve reduced code size.

This reduced code size implementation of printf and puts can be enabled
in an application by passing "--wrap printf" and "--wrap puts" to the
GNU linker. This will replace references to "printf" and "puts" in user
code with "__wrap_printf" and "__wrap_puts" respectively.
If there is no implementation of these __wrap* functions in user code,
these "tiny" printf and puts implementations will be linked into the
final executable.

The wrapping mechanism is supposed to be invisible to the user:
- A GCC wrapper option such as "-mtiny-printf" will be added to alias
  these wrap commands.
- If the user is unaware of the "tiny" implementation, and chooses to
  implement their own __wrap_printf and __wrap_puts, their own
  implementation will be automatically chosen over the "tiny" printf and
  puts from the library.

Newlib must be configured with --enable-newlib-nano-formatted-io for
the "tiny" printf and puts functions to be built into the library.

Code size reduction examples:
printf("Hello World\n")
  baseline - msp430-elf-gcc gcc-8_3_0-release
     text    data     bss
   5638     214      26
  "tiny" puts enabled
    text    data     bss
     714      90      20

printf("Hello %d\n", a)
  baseline - msp430-elf-gcc gcc-8_3_0-release
    text    data     bss
   10916     614      28

  "tiny" printf enabled
    text    data     bss
    4632     280      20
This commit is contained in:
Jozef Lawrynowicz 2019-04-12 12:08:22 +01:00 committed by Corinna Vinschen
parent 2af6ad9f05
commit 1e6c561d48
6 changed files with 131 additions and 427 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

9
newlib/libc/machine/msp430/Makefile.am
View File

@ -21,9 +21,16 @@ AM_CCASFLAGS = $(INCLUDES)
noinst_LIBRARIES = lib.a
lib_a_SOURCES = setjmp.S
lib_a_SOURCES = setjmp.S $(TINY_SOURCES)
lib_a_CCASFLAGS=$(AM_CCASFLAGS)
lib_a_CFLAGS=$(AM_CFLAGS)
# tiny-printf.c and tiny-puts.c are derived from the nano printf/puts
# functions, so other supporting nano functions are required, and the tiny
# printf/puts will not work without them.
if NEWLIB_NANO_FORMATTED_IO
TINY_SOURCES = tiny-puts.c tiny-printf.c
endif
ACLOCAL_AMFLAGS = -I ../../.. -I ../../../..
CONFIG_STATUS_DEPENDENCIES = $(newlib_basedir)/configure.host

33
newlib/libc/machine/msp430/Makefile.in
View File

@ -82,7 +82,10 @@ LIBRARIES = $(noinst_LIBRARIES)
ARFLAGS = cru
lib_a_AR = $(AR) $(ARFLAGS)
lib_a_LIBADD =
am_lib_a_OBJECTS = lib_a-setjmp.$(OBJEXT)
@NEWLIB_NANO_FORMATTED_IO_TRUE@am__objects_1 = \
@NEWLIB_NANO_FORMATTED_IO_TRUE@ lib_a-tiny-puts.$(OBJEXT) \
@NEWLIB_NANO_FORMATTED_IO_TRUE@ lib_a-tiny-printf.$(OBJEXT)
am_lib_a_OBJECTS = lib_a-setjmp.$(OBJEXT) $(am__objects_1)
lib_a_OBJECTS = $(am_lib_a_OBJECTS)
DEFAULT_INCLUDES = -I.@am__isrc@
depcomp =
@ -195,6 +198,7 @@ pdfdir = @pdfdir@
prefix = @prefix@
program_transform_name = @program_transform_name@
psdir = @psdir@
runstatedir = @runstatedir@
sbindir = @sbindir@
sharedstatedir = @sharedstatedir@
srcdir = @srcdir@
@ -208,15 +212,20 @@ AUTOMAKE_OPTIONS = cygnus
INCLUDES = $(NEWLIB_CFLAGS) $(CROSS_CFLAGS) $(TARGET_CFLAGS)
AM_CCASFLAGS = $(INCLUDES)
noinst_LIBRARIES = lib.a
lib_a_SOURCES = setjmp.S
lib_a_SOURCES = setjmp.S $(TINY_SOURCES)
lib_a_CCASFLAGS = $(AM_CCASFLAGS)
lib_a_CFLAGS = $(AM_CFLAGS)
# tiny-printf.c and tiny-puts.c are derived from the nano printf/puts
# functions, so other supporting nano functions are required, and the tiny
# printf/puts will not work without them.
@NEWLIB_NANO_FORMATTED_IO_TRUE@TINY_SOURCES = tiny-puts.c tiny-printf.c
ACLOCAL_AMFLAGS = -I ../../.. -I ../../../..
CONFIG_STATUS_DEPENDENCIES = $(newlib_basedir)/configure.host
all: all-am
.SUFFIXES:
.SUFFIXES: .S .o .obj
.SUFFIXES: .S .c .o .obj
am--refresh: Makefile
@:
$(srcdir)/Makefile.in: @MAINTAINER_MODE_TRUE@ $(srcdir)/Makefile.am $(am__configure_deps)
@ -277,6 +286,24 @@ lib_a-setjmp.o: setjmp.S
lib_a-setjmp.obj: setjmp.S
$(CCAS) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(AM_CPPFLAGS) $(CPPFLAGS) $(lib_a_CCASFLAGS) $(CCASFLAGS) -c -o lib_a-setjmp.obj `if test -f 'setjmp.S'; then $(CYGPATH_W) 'setjmp.S'; else $(CYGPATH_W) '$(srcdir)/setjmp.S'; fi`
.c.o:
$(COMPILE) -c $<
.c.obj:
$(COMPILE) -c `$(CYGPATH_W) '$<'`
lib_a-tiny-puts.o: tiny-puts.c
$(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(AM_CPPFLAGS) $(CPPFLAGS) $(lib_a_CFLAGS) $(CFLAGS) -c -o lib_a-tiny-puts.o `test -f 'tiny-puts.c' || echo '$(srcdir)/'`tiny-puts.c
lib_a-tiny-puts.obj: tiny-puts.c
$(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(AM_CPPFLAGS) $(CPPFLAGS) $(lib_a_CFLAGS) $(CFLAGS) -c -o lib_a-tiny-puts.obj `if test -f 'tiny-puts.c'; then $(CYGPATH_W) 'tiny-puts.c'; else $(CYGPATH_W) '$(srcdir)/tiny-puts.c'; fi`
lib_a-tiny-printf.o: tiny-printf.c
$(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(AM_CPPFLAGS) $(CPPFLAGS) $(lib_a_CFLAGS) $(CFLAGS) -c -o lib_a-tiny-printf.o `test -f 'tiny-printf.c' || echo '$(srcdir)/'`tiny-printf.c
lib_a-tiny-printf.obj: tiny-printf.c
$(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(AM_CPPFLAGS) $(CPPFLAGS) $(lib_a_CFLAGS) $(CFLAGS) -c -o lib_a-tiny-printf.obj `if test -f 'tiny-printf.c'; then $(CYGPATH_W) 'tiny-printf.c'; else $(CYGPATH_W) '$(srcdir)/tiny-printf.c'; fi`
ID: $(HEADERS) $(SOURCES) $(LISP) $(TAGS_FILES)
list='$(SOURCES) $(HEADERS) $(LISP) $(TAGS_FILES)'; \
unique=`for i in $$list; do \

28
newlib/libc/machine/msp430/configure vendored
View File

@ -640,6 +640,8 @@ build
newlib_basedir
MAY_SUPPLY_SYSCALLS_FALSE
MAY_SUPPLY_SYSCALLS_TRUE
NEWLIB_NANO_FORMATTED_IO_FALSE
NEWLIB_NANO_FORMATTED_IO_TRUE
target_alias
host_alias
build_alias
@ -681,6 +683,7 @@ SHELL'
ac_subst_files=''
ac_user_opts='
enable_option_checking
enable_newlib_nano_formatted_io
enable_multilib
enable_target_optspace
enable_malloc_debugging
@ -1318,6 +1321,7 @@ Optional Features:
--disable-option-checking ignore unrecognized --enable/--with options
--disable-FEATURE do not include FEATURE (same as --enable-FEATURE=no)
--enable-FEATURE[=ARG] include FEATURE [ARG=yes]
--enable-newlib-nano-formatted-io Use small-footprint nano-formatted-IO implementation
--enable-multilib build many library versions (default)
--enable-target-optspace optimize for space
--enable-malloc-debugging indicate malloc debugging requested
@ -1837,6 +1841,26 @@ ac_configure="$SHELL $ac_aux_dir/configure" # Please don't use this var.
# Check whether --enable-newlib_nano_formatted_io was given.
if test "${enable_newlib_nano_formatted_io+set}" = set; then :
enableval=$enable_newlib_nano_formatted_io; case "${enableval}" in
yes) newlib_nano_formatted_io=yes ;;
no) newlib_nano_formatted_io=no ;;
*) as_fn_error $? "bad value ${enableval} for newlib-nano-formatted-io" "$LINENO" 5 ;;
esac
else
newlib_nano_formatted_io=no
fi
if test x$newlib_nano_formatted_io = xyes; then
NEWLIB_NANO_FORMATTED_IO_TRUE=
NEWLIB_NANO_FORMATTED_IO_FALSE='#'
else
NEWLIB_NANO_FORMATTED_IO_TRUE='#'
NEWLIB_NANO_FORMATTED_IO_FALSE=
fi
# Make sure we can run config.sub.
$SHELL "$ac_aux_dir/config.sub" sun4 >/dev/null 2>&1 ||
@ -3575,6 +3599,10 @@ LIBOBJS=$ac_libobjs
LTLIBOBJS=$ac_ltlibobjs
if test -z "${NEWLIB_NANO_FORMATTED_IO_TRUE}" && test -z "${NEWLIB_NANO_FORMATTED_IO_FALSE}"; then
as_fn_error $? "conditional \"NEWLIB_NANO_FORMATTED_IO\" was never defined.
Usually this means the macro was only invoked conditionally." "$LINENO" 5
fi
if test -z "${MAY_SUPPLY_SYSCALLS_TRUE}" && test -z "${MAY_SUPPLY_SYSCALLS_FALSE}"; then
as_fn_error $? "conditional \"MAY_SUPPLY_SYSCALLS\" was never defined.
Usually this means the macro was only invoked conditionally." "$LINENO" 5

11
newlib/libc/machine/msp430/configure.in
View File

@ -21,6 +21,17 @@ AC_CONFIG_SRCDIR([setjmp.S])
dnl Can't be done in NEWLIB_CONFIGURE because that confuses automake.
AC_CONFIG_AUX_DIR(../../../..)
dnl Support --enable-newlib-nano-formatted-io required by tiny-printf.c
dnl and tiny-puts.c
AC_ARG_ENABLE(newlib_nano_formatted_io,
[ --enable-newlib-nano-formatted-io Use small-footprint nano-formatted-IO implementation],
[case "${enableval}" in
yes) newlib_nano_formatted_io=yes ;;
no) newlib_nano_formatted_io=no ;;
*) AC_MSG_ERROR(bad value ${enableval} for newlib-nano-formatted-io) ;;
esac],[newlib_nano_formatted_io=no])
AM_CONDITIONAL(NEWLIB_NANO_FORMATTED_IO, test x$newlib_nano_formatted_io = xyes)
NEWLIB_CONFIGURE(../../..)
AC_CONFIG_FILES([Makefile])

457
newlib/libc/machine/msp430/tiny-printf.c
View File

@ -58,100 +58,11 @@
* 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>
@ -162,310 +73,35 @@ static char *rcsid = "$Id$";
#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"
#include <string.h>
#include <newlib.h>
#include "../../stdio/local.h"
#include "../../stdlib/local.h"
#include "../../stdio/fvwrite.h"
#include "../../stdio/nano-vfprintf_local.h"
/* The __ssputs_r function is shared between all versions of vfprintf
and vfwprintf. */
#ifdef STRING_ONLY
/* Bypass *putc* fns called by the default _sfputs_r to save code size.
Among other things, this means there is no buffering of the string before
it is sent to <<write>>, but <<write>> does its own buffering so we won't
lose chars when buf is larger than sizeof(CIOBUF). */
int
__ssputs_r (struct _reent *ptr,
__tiny__sfputs_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));
return write (1, buf, len);
}
/* VFPRINTF_R from nano-vfprintf.c but:
- No support for reentrancy
- No support for streams
- __SINGLE_THREAD__ assumed.
- No STRING_ONLY variant (either way the formatted string would end up
being sent to <<write>> via <<__tiny__sfputs_r>>.
Basically, format the string as normal, and send it to write. */
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,
__tiny_vfprintf_r (struct _reent *data,
FILE * fp,
const char *fmt0,
va_list ap)
@ -480,33 +116,7 @@ _VFPRINTF_R (struct _reent *data,
/* 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
pfunc = __tiny__sfputs_r;
fmt = (char *)fmt0;
prt_data.ret = 0;
@ -641,21 +251,22 @@ _VFPRINTF_R (struct _reent *data,
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
__wrap_printf (const char *__restrict fmt, ...)
{
int ret;
va_list ap;
struct _reent *ptr = _REENT;
va_start (ap, fmt);
ret = __tiny_vfprintf_r (ptr, _stdout_r (ptr), fmt, ap);
va_end (ap);
return ret;
}
int printf (const char *__restrict fmt, ...) __attribute__ ((weak, alias ("__wrap_printf")));

20
newlib/libc/machine/msp430/tiny-puts.c Normal file
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@ -0,0 +1,20 @@
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <newlib.h>
int write (int fd, const char *buf, int len);
int
__wrap_puts (const char * s)
{
int res = write (1, s, strlen (s));
if (res == EOF)
{
write (1, "\n", 1);
return EOF;
}
return write (1, "\n", 1);
}
int puts (const char * s) __attribute__ ((weak, alias ("__wrap_puts")));