iprintf.c

来自「用于嵌入式Linux系统的标准C的库函数」· C语言 代码 · 共 101 行

/*
FUNCTION
        <<iprintf>>---write formatted output (integer only)
INDEX
	iprintf

ANSI_SYNOPSIS
        #include <stdio.h>

        int iprintf(const char *<[format]>, ...);

TRAD_SYNOPSIS
	#include <stdio.h>

	int iprintf(<[format]> [, <[arg]>, ...])
	char *<[format]>;

DESCRIPTION
<<iprintf>> is a restricted version of <<printf>>: it has the same
arguments and behavior, save that it cannot perform any floating-point
formatting: the <<f>>, <<g>>, <<G>>, <<e>>, and <<F>> type specifiers
are not recognized.

RETURNS
        <<iprintf>> returns the number of bytes in the output string,
        save that the concluding <<NULL>> is not counted.
        <<iprintf>> returns when the end of the format string is
        encountered.  If an error occurs, <<iprintf>>
        returns <<EOF>>.

PORTABILITY
<<iprintf>> is not required by ANSI C.

Supporting OS subroutines required: <<close>>, <<fstat>>, <<isatty>>,
<<lseek>>, <<read>>, <<sbrk>>, <<write>>.
*/

#include <_ansi.h>
#include <stdio.h>

#include "local.h"

#ifdef _HAVE_STDC
#include <stdarg.h>
#else
#include <varargs.h>
#endif

#ifndef _REENT_ONLY

#ifdef _HAVE_STDC
int
iprintf (const char *fmt,...)
#else
int
iprintf (fmt, va_alist)
     char *fmt;
     va_dcl
#endif
{
  int ret;
  va_list ap;

  _REENT_SMALL_CHECK_INIT(_stdout_r (_REENT));
#ifdef _HAVE_STDC
  va_start (ap, fmt);
#else
  va_start (ap);
#endif
  ret = vfiprintf (stdout, fmt, ap);
  va_end (ap);
  return ret;
}

#endif /* ! _REENT_ONLY */

#ifdef _HAVE_STDC
int
_iprintf_r (struct _reent *ptr, const char *fmt, ...)
#else
int
_iprintf_r (data, fmt, va_alist)
     char *data;
     char *fmt;
     va_dcl
#endif
{
  int ret;
  va_list ap;

  _REENT_SMALL_CHECK_INIT(_stdout_r (ptr));
#ifdef _HAVE_STDC
  va_start (ap, fmt);
#else
  va_start (ap);
#endif
  ret = vfiprintf (_stdout_r (ptr), fmt, ap);
  va_end (ap);
  return ret;
}