disrfst.c

openPBS的开放源代码

/*
*         OpenPBS (Portable Batch System) v2.3 Software License
* 
* Copyright (c) 1999-2000 Veridian Information Solutions, Inc.
* All rights reserved.
* 
* ---------------------------------------------------------------------------
* For a license to use or redistribute the OpenPBS software under conditions
* other than those described below, or to purchase support for this software,
* please contact Veridian Systems, PBS Products Department ("Licensor") at:
* 
*    www.OpenPBS.org  [phone]                  [e-mail]
*                        877 902-4PBS (US toll-free)
* ---------------------------------------------------------------------------
* 
* This license covers use of the OpenPBS v2.3 software (the "Software") at
* your site or location, and, for certain users, redistribution of the
* Software to other sites and locations.  Use and redistribution of
* OpenPBS v2.3 in source and binary forms, with or without modification,
* are permitted provided that all of the following conditions are met.
* After December 31, 2001, only conditions 3-6 must be met:
* 
* 1. Commercial and/or non-commercial use of the Software is permitted
*    provided a current software registration is on file at www.OpenPBS.org.
*    If use of this software contributes to a publication, product, or
*    service, proper attribution must be given; see www.OpenPBS.org/credit.html
* 
* 2. Redistribution in any form is only permitted for non-commercial,
*    non-profit purposes.  There can be no charge for the Software or any
*    software incorporating the Software.  Further, there can be no
*    expectation of revenue generated as a consequence of redistributing
*    the Software.
* 
* 3. Any Redistribution of source code must retain the above copyright notice
*    and the acknowledgment contained in paragraph 6, this list of conditions
*    and the disclaimer contained in paragraph 7.
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*    obtain complete source code for the OpenPBS software and any
*    modifications and/or additions to the OpenPBS software.  The source code
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*    and additions to the Software must be freely redistributable by any party
*    (including Licensor) without restriction.
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* 6. All advertising materials mentioning features or use of the Software must
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*     "This product includes software developed by NASA Ames Research Center,
*     Lawrence Livermore National Laboratory, and Veridian Information 
*     Solutions, Inc.
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* 7. DISCLAIMER OF WARRANTY
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* THIS SOFTWARE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. ANY EXPRESS
* OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, AND NON-INFRINGEMENT
* ARE EXPRESSLY DISCLAIMED.
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* U.S. GOVERNMENT OR ANY OF ITS AGENCIES BE LIABLE FOR ANY DIRECT OR INDIRECT,
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* 
* This license will be governed by the laws of the Commonwealth of Virginia,
* without reference to its choice of law rules.
*/
/*
 * Synopsis:
 *	int disrfst(int stream, size_t achars, char *value)
 *
 *	Gets a Data-is-Strings character string from <stream> and converts it
 *	into an ASCII NUL-terminated string, and puts the string into <value>,
 *	a pre-allocated string, <achars> long.  The character string in <stream>
 *	consists of an unsigned integer, followed by a number of characters
 *	determined by the unsigned integer.
 *
 *	Disrfst returns DIS_SUCCESS if everything works well.  It returns an
 *	error code otherwise.  In case of an error, the <stream> character
 *	pointer is reset, making it possible to retry with some other conversion
 *	strategy, and the first character of <value> is set to ASCII NUL.
 */

#include <pbs_config.h>   /* the master config generated by configure */

#include <assert.h>
#include <stddef.h>
#include <stdlib.h>

#ifndef NDEBUG
#include <string.h>
#endif

#include "dis.h"
#include "dis_.h"

int disrfst(stream, achars, value)
    int			stream;
    size_t		achars;
    char		*value;
    {
        int		locret;
        int		negate;
        unsigned	count;

	assert(value != NULL);
	assert(dis_gets != NULL);
	assert(disr_commit != NULL);

	locret = disrsi_(stream, &negate, &count, 1);
	if (locret == DIS_SUCCESS) {
		if (negate)
		        locret = DIS_BADSIGN;
		else if (count > achars)
		        locret = DIS_OVERFLOW;
		else if ((*dis_gets)(stream, value, (size_t)count) !=
						(size_t)count)
		        locret = DIS_PROTO;
#ifndef NDEBUG
		else if (memchr(value, 0, (size_t)count))
		        locret = DIS_NULLSTR;
#endif
		else
		        value[count] = '\0';
	}
	locret = (*disr_commit)(stream, locret == DIS_SUCCESS) ?
	    DIS_NOCOMMIT : locret;
	if (locret != DIS_SUCCESS)
	        *value = '\0';
	return (locret);
}