_SP_snprintf.c

/*
 * Copyright (c) 1990 The Regents of the University of California.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms are permitted
 * provided that the above copyright notice and this paragraph are
 * duplicated in all such forms and that any documentation,
 * advertising materials, and other materials related to such
 * distribution and use acknowledge that the software was developed
 * by the University of California, Berkeley.  The name of the
 * University may not be used to endorse or promote products derived
 * from this software without specific prior written permission.
 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
 */
/* doc in _SP_sprintf.c */
/* This code created by modifying _SP_sprintf.c so copyright inherited. */

#include <stdio.h>
#ifdef _HAVE_STDC
#include <stdarg.h>
#else
#include <varargs.h>
#endif
#include <limits.h>
#include <errno.h>
#include <_ansi.h>

#ifndef _SMALL_PRINTF
                #include "local.h"
#else
        #ifdef INTEGER_ONLY
                #define _vfprintf_r  _vfiprintf_r 
        #endif
#endif


#ifndef _SMALL_PRINTF
        int
        #ifdef _HAVE_STDC
        _DEFUN (_snprintf_r, (ptr, str, size, fmt), struct _reent *ptr _AND char *str _AND size_t size _AND _CONST char *fmt _DOTS)
        #else
        _snprintf_r (ptr, str, size, fmt, va_alist)
             struct _reent *ptr;
             char *str;
                 size_t size;
             _CONST char *fmt;
             va_dcl
        #endif
        {
          int ret;
          va_list ap;
          FILE f;
          
          if (size > INT_MAX)
                {
                 ptr->_errno = EOVERFLOW;
                 return EOF;
                }
        
          f._flags = __SWR | __SSTR;
          f._bf._base = f._p = (unsigned char *) str;
          f._bf._size = f._w = (size > 0 ? size - 1 : 0);
          f._file = -1;  /* No file. */
        #ifdef _HAVE_STDC
          va_start (ap, fmt);
        #else
          va_start (ap);
        #endif
          ret = _vfprintf_r (ptr, &f, fmt, ap);
          va_end (ap);
          if (ret < EOF)
                ptr->_errno = EOVERFLOW;
          if (size > 0)
                *f._p = 0;
          return (ret);
        }
#endif

#ifndef _REENT_ONLY
int
#ifdef _HAVE_STDC
_DEFUN (snprintf, (str, size, fmt), char *str _AND size_t size _AND _CONST char *fmt _DOTS)
#else
snprintf (str, size, fmt, va_alist)
     char *str;
         size_t size;
     _CONST char *fmt;
     va_dcl
#endif
{
  int ret;
  va_list ap;
  FILE f;

  struct _reent *ptr = _REENT;

  if (size > INT_MAX)
    {
      ptr->_errno = EOVERFLOW;
      return EOF;
    }

  f._flags = __SWR | __SSTR;
  f._bf._base = f._p = (unsigned char *) str;
  f._bf._size = f._w = (size > 0 ? size - 1 : 0);
  f._file = -1;  /* No file. */
#ifdef _HAVE_STDC
  va_start (ap, fmt);
#else
  va_start (ap);
#endif
  ret = _vfprintf_r (ptr, &f, fmt, ap);
  va_end (ap);
  if (ret < EOF)
    ptr->_errno = EOVERFLOW;
  if (size > 0)
        *f._p = 0;
  return (ret);
}
#endif