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att
GitHub Repository: att/ast
 Path: blob/master/src/cmd/tests/sfio/tnoseek.c
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/***********************************************************************

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*                                                                      *

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*               This software is part of the ast package               *

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*          Copyright (c) 1999-2011 AT&T Intellectual Property          *

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*                      and is licensed under the                       *

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*                 Eclipse Public License, Version 1.0                  *

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*                    by AT&T Intellectual Property                     *

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*                                                                      *

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*                A copy of the License is available at                 *

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*          http://www.eclipse.org/org/documents/epl-v10.html           *

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*         (with md5 checksum b35adb5213ca9657e911e9befb180842)         *

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*                                                                      *

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*              Information and Software Systems Research               *

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*                            AT&T Research                             *

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*                           Florham Park NJ                            *

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*                                                                      *

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*                 Glenn Fowler <[email protected]>                  *

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*                                                                      *

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***********************************************************************/

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#include	"sftest.h"

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char*	buffer;

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size_t	size;

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size_t	count;

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#if __STD_C

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Sfoff_t discseek(Sfio_t* f, Sfoff_t offset, int type, Sfdisc_t* disc)

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#else

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Sfoff_t discseek(f,offset,type,disc)

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Sfio_t*		f;

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Sfoff_t		offset;

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int		type;

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Sfdisc_t*	disc;

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#endif

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{

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	return 0;

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}

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#if __STD_C

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ssize_t discwrite(Sfio_t* f, const Void_t* s, size_t n, Sfdisc_t* disc)

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#else

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ssize_t discwrite(f,s,n,disc)

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Sfio_t*		f;

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Void_t*		s;

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size_t		n;

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Sfdisc_t*	disc;

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#endif

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{

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	buffer = (char*)s;

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	size = n;

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	count += 1;

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	return n;

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}

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

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tmain()

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{

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	char	buf[1024];

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	sfsetbuf(sfstdout,buf,sizeof(buf));

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	sfset(sfstdout,SF_LINE,0);

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	if(sfdisc(sfstdout,&seekable) != &seekable)

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		terror("Can't set discipline");

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	if(sfseek(sfstdout,(Sfoff_t)0,0) < 0)

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		terror("Sfstdout should be seekable");

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	if(sfwrite(sfstdout,"123\n",4) != 4)

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		terror("Can't write");

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	if(sfwrite(sfstdout,"123\n",4) != 4)

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		terror("Can't write");

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	if(sfdisc(sfstdout,NIL(Sfdisc_t*)) != &seekable)

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		terror("Can't pop discipline");

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	if(buffer != buf || size != 8 || count != 1)

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		terror("Wrong calls to write");

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	texit(0);

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}

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