diswsl.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.
* 
* ---------------------------------------------------------------------------
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* 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.
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*/
/*
 * Synopsis:
 * 	int diswsl(int stream, long value)
 *
 *	Converts <value> into a Data-is-Strings signed integer and sends it to
 *	<stream>.
 *
 *	This format for character strings representing integers can best be
 *	understood through the decoding algorithm:
 *
 *	1. Initialize the digit count to 1.
 *
 *	2. Read the next character; if it is a sign, go to step (4).
 *
 *	3. Decode a new count from the digit decoded in step (2) and the next
 *	   count - 1 digits; repeat step (2).
 *
 *	4. Decode the next count digits as the unsigned integer.
 *
 *	Returns DIS_SUCCESS if everything works well.  Returns an error code
 *	otherwise.  In case of an error, no characters are sent to <stream>.
 */

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

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

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

int diswsl(stream, value)
    int			stream;
    long		value;
    {
	int		retval;
	unsigned	ndigs;
	unsigned long	ulval;
	char		c;
	char		*cp;

	assert(stream >= 0);
	assert(dis_puts != NULL);
	assert(disw_commit != NULL);

	if (value < 0) {
		ulval = (unsigned long)-(value + 1) + 1;
		c = '-';
	} else {
		ulval = value;
	        c = '+';
	}
	cp = discul_(&dis_buffer[DIS_BUFSIZ], ulval, &ndigs);
	*--cp = c;
	while (ndigs > 1)
		cp = discui_(cp, ndigs, &ndigs);
	retval = (*dis_puts)(stream, cp,
			(size_t)(&dis_buffer[DIS_BUFSIZ] - cp)) < 0 ?
			DIS_PROTO : DIS_SUCCESS;
	return (((*disw_commit)(stream, retval == DIS_SUCCESS) < 0) ?
	       DIS_NOCOMMIT : retval);
}