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att
GitHub Repository: att/ast
 Path: blob/master/src/lib/libdss/dss-null.h
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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) 2002-2011 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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#pragma prototyped

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/*

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 * null query

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 */

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static const char null_usage[] =

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"[-1ls5P?\n@(#)$Id: dss null query (AT&T Research) 2002-12-10 $\n]"

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USAGE_LICENSE

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"[+PLUGIN?\findex\f]"

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"[+DESCRIPTION?The \bdss\b \bnull\b query selects all records"

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"	but otherwise generates no output.]"

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;

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static int

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null_beg(Cx_t* cx, Cxexpr_t* expr, void* data, Cxdisc_t* disc)

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{

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	char**	argv = (char**)data;

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	int	errors = error_info.errors;

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	for (;;)

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	{

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		switch (optget(argv, null_usage))

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		{

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		case '?':

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			if (disc->errorf)

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				(*disc->errorf)(NiL, disc, ERROR_USAGE|4, "%s", opt_info.arg);

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			continue;

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		case ':':

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			if (disc->errorf)

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				(*disc->errorf)(NiL, disc, 2, "%s", opt_info.arg);

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			continue;

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		}

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		break;

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	}

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	if (error_info.errors > errors)

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		return -1;

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	argv += opt_info.index;

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	if (*argv)

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	{

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		if (disc->errorf)

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			(*disc->errorf)(NiL, disc, ERROR_USAGE|4, "%s", optusage(NiL));

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		return -1;

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	}

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	return 0;

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}

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#define QUERY_null \

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	{ \

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		"null", \

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		"select all records; generate no output", \

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		CXH, \

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		null_beg, \

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		0, \

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		0, \

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		0 \

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	}

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