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sfprintf.c

/***********************************************************************
*                                                                      *
*               This software is part of the ast package               *
*          Copyright (c) 1985-2008 AT&T Intellectual Property          *
*                      and is licensed under the                       *
*                  Common Public License, Version 1.0                  *
*                    by AT&T Intellectual Property                     *
*                                                                      *
*                A copy of the License is available at                 *
*            http://www.opensource.org/licenses/cpl1.0.txt             *
*         (with md5 checksum 059e8cd6165cb4c31e351f2b69388fd9)         *
*                                                                      *
*              Information and Software Systems Research               *
*                            AT&T Research                             *
*                           Florham Park NJ                            *
*                                                                      *
*                 Glenn Fowler <gsf@research.att.com>                  *
*                  David Korn <dgk@research.att.com>                   *
*                   Phong Vo <kpv@research.att.com>                    *
*                                                                      *
***********************************************************************/
#include    "sfhdr.h"

/*    Print data with a given format
**
**    Written by Kiem-Phong Vo.
*/

#if __STD_C
int sfprintf(Sfio_t* f, const char* form, ...)
#else
int sfprintf(va_alist)
va_dcl
#endif
{
      va_list     args;
      reg int     rv;

#if __STD_C
      va_start(args,form);
#else
      reg Sfio_t* f;
      reg char*   form;
      va_start(args);
      f = va_arg(args,Sfio_t*);
      form = va_arg(args,char*);
#endif
      rv = sfvprintf(f,form,args);

      va_end(args);
      return rv;
}

#if __STD_C
ssize_t sfvsprintf(char* s, size_t n, const char* form, va_list args)
#else
ssize_t sfvsprintf(s, n, form, args)
char* s;
size_t      n;
char* form;
va_list     args;
#endif
{
      Sfio_t      *f;
      ssize_t     rv;

      /* make a temp stream */
      if(!(f = sfnew(NIL(Sfio_t*),NIL(char*),(size_t)SF_UNBOUND,
                        -1,SF_WRITE|SF_STRING)) )
            return -1;

      if((rv = sfvprintf(f,form,args)) < 0 )
            return -1;
      if(s && n > 0)
      {     if((rv+1) >= n)
                  n--;
            else
                  n = rv;
            memcpy(s, f->data, n);
            s[n] = 0;
      }

      sfclose(f);

      _Sfi = rv;

      return rv;
}

#if __STD_C
ssize_t sfsprintf(char* s, size_t n, const char* form, ...)
#else
ssize_t sfsprintf(va_alist)
va_dcl
#endif
{
      va_list     args;
      ssize_t     rv;

#if __STD_C
      va_start(args,form);
#else
      reg char*   s;
      reg size_t  n;
      reg char*   form;
      va_start(args);
      s = va_arg(args,char*);
      n = va_arg(args,size_t);
      form = va_arg(args,char*);
#endif

      rv = sfvsprintf(s,n,form,args);
      va_end(args);

      return rv;
}

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