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tnoseek.c

/***********************************************************************
*                                                                      *
*               This software is part of the ast package               *
*           Copyright (c) 1999-2007 AT&T Knowledge Ventures            *
*                      and is licensed under the                       *
*                  Common Public License, Version 1.0                  *
*                      by AT&T Knowledge Ventures                      *
*                                                                      *
*                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>                  *
*                                                                      *
***********************************************************************/
#include    "sftest.h"

char* buffer;
size_t      size;
size_t      count;

#if __STD_C
Sfoff_t discseek(Sfio_t* f, Sfoff_t offset, int type, Sfdisc_t* disc)
#else
Sfoff_t discseek(f,offset,type,disc)
Sfio_t*           f;
Sfoff_t           offset;
int         type;
Sfdisc_t*   disc;
#endif
{
      return 0;
}

#if __STD_C
ssize_t discwrite(Sfio_t* f, const Void_t* s, size_t n, Sfdisc_t* disc)
#else
ssize_t discwrite(f,s,n,disc)
Sfio_t*           f;
Void_t*           s;
size_t            n;
Sfdisc_t*   disc;
#endif
{
      buffer = (char*)s;
      size = n;
      count += 1;
      return n;
}

Sfdisc_t seekable = { (Sfread_f)0, discwrite, discseek, (Sfexcept_f)0 };

MAIN()
{
      char  buf[1024];

      sfsetbuf(sfstdout,buf,sizeof(buf));
      sfset(sfstdout,SF_LINE,0);

      if(sfdisc(sfstdout,&seekable) != &seekable)
            terror("Can't set discipline\n");
      if(sfseek(sfstdout,(Sfoff_t)0,0) < 0)
            terror("Sfstdout should be seekable\n");
      if(sfwrite(sfstdout,"123\n",4) != 4)
            terror("Can't write\n");
      if(sfwrite(sfstdout,"123\n",4) != 4)
            terror("Can't write\n");
      if(sfdisc(sfstdout,NIL(Sfdisc_t*)) != &seekable)
            terror("Can't pop discipline\n");

      if(buffer != buf || size != 8 || count != 1)
            terror("Wrong calls to write\n");

      TSTEXIT(0);
}

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