diswul.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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* 
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* 
* 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,
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* 
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/*
 * Synopsis:
 *	int diswul(int stream, unsigned long value)
 *
 *	Converts <value> into a Data-is-Strings unsigned integer and sends it to
 *	<stream>.
 *
 *	This format for character strings representing unsigned 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 plus sign, go to step (4); if it
 *	   is a minus sign, post an error.
 *
 *	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 diswul(stream, value)
    int			stream;
    unsigned long	value;
    {
	int		retval;
	unsigned	ndigs;
	char		*cp;

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

	cp = discul_(&dis_buffer[DIS_BUFSIZ], value, &ndigs);
	*--cp = '+';
	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);
}