attr_fn_size.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.
* 
* 4. Any Redistribution in binary form must reproduce the above copyright
*    notice and the acknowledgment contained in paragraph 6, this list of
*    conditions and the disclaimer contained in paragraph 7 in the
*    documentation and/or other materials provided with the distribution.
* 
* 5. Redistributions in any form must be accompanied by information on how to
*    obtain complete source code for the OpenPBS software and any
*    modifications and/or additions to the OpenPBS software.  The source code
*    must either be included in the distribution or be available for no more
*    than the cost of distribution plus a nominal fee, and all modifications
*    and additions to the Software must be freely redistributable by any party
*    (including Licensor) without restriction.
* 
* 6. All advertising materials mentioning features or use of the Software must
*    display the following acknowledgment:
* 
*     "This product includes software developed by NASA Ames Research Center,
*     Lawrence Livermore National Laboratory, and Veridian Information 
*     Solutions, Inc.
*     Visit www.OpenPBS.org for OpenPBS software support,
*     products, and information."
* 
* 7. DISCLAIMER OF WARRANTY
* 
* 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.
* 
* IN NO EVENT SHALL VERIDIAN CORPORATION, ITS AFFILIATED COMPANIES, OR THE
* U.S. GOVERNMENT OR ANY OF ITS AGENCIES BE LIABLE FOR ANY DIRECT OR INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA,
* OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
* EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
* 
* This license will be governed by the laws of the Commonwealth of Virginia,
* without reference to its choice of law rules.
*/
#include <pbs_config.h>   /* the master config generated by configure */

#include <assert.h>
#include <ctype.h>
#include <memory.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <pbs_ifl.h>
#include "list_link.h"
#include "attribute.h"
#include "pbs_error.h"

static char ident[] = "@(#) $RCSfile: attr_fn_size.c,v $ $Revision: 2.1.10.4 $";

/*
 * This file contains functions for manipulating attributes of type
 *	size, which is an integer optionally followed by k,K,m,M,g,
 *	G,t, or T, optionally followed by w,W,b,B.
 *	If 'w' or 'W' is not specified, b for bytes is assumed.
 *
 * The attribute has functions for:
 *	Decoding the value string to the machine representation.
 *	Encoding the internal attribute to external form
 *	Setting the value by =, + or - operators.
 *	Comparing a (decoded) value with the attribute value.
 *
 * Some or all of the functions for an attribute type may be shared with
 * other attribute types.
 * 
 * The prototypes are declared in "attribute.h"
 *
 * --------------------------------------------------
 * The Set of Attribute Functions for attributes with
 * value type "size"
 * --------------------------------------------------
 */


/*
 * decode_size - decode size into attribute structure
 *
 *	Returns: 0 if ok
 *		>0 error number if error
 *		*patr elements set
 */

int decode_size(patr, name, rescn, val)
	struct attribute *patr;
	char *name;		/* attribute name */
	char *rescn;		/* resource name, unused here */
	char *val;		/* attribute value */
{
	int to_size A_((char *, struct size_value *));

	patr->at_val.at_size.atsv_num   = 0;
	patr->at_val.at_size.atsv_shift = 0;
	if ((val != (char *)0) && (strlen(val) != 0)) {
		if (to_size(val, &patr->at_val.at_size) != 0)
			return (PBSE_BADATVAL);
		patr->at_flags |= ATR_VFLAG_SET | ATR_VFLAG_MODIFY;
	} else {
		patr->at_flags = (patr->at_flags & ~ATR_VFLAG_SET) |
				 ATR_VFLAG_MODIFY;
	}
	return (0);
}

/*
 * encode_size - encode attribute of type size into attr_extern
 *
 *	Returns: >0 if ok
 *		 =0 if no value, no attrlist link added
 *		 <0 if error
 */
/*ARGSUSED*/

#define CVNBUFSZ 23

int encode_size(attr, phead, atname, rsname, mode)
	attribute	*attr;	  /* ptr to attribute */
	list_head	*phead;	  /* head of attrlist list */
	char		*atname;  /* attribute name */
	char		*rsname;  /* resource name or null */
	int		mode;	  /* encode mode, unused here */
{
	size_t	     ct;
	char	     cvnbuf[CVNBUFSZ];
	svrattrl *pal;
	void from_size A_((struct size_value *, char *));

	if ( !attr )
		return (-1);
	if ( !(attr->at_flags & ATR_VFLAG_SET))
		return (0);

	from_size(&attr->at_val.at_size, cvnbuf);
	ct = strlen(cvnbuf) + 1;

	pal = attrlist_create(atname, rsname, ct);
	if (pal == (svrattrl *)0)
		return (-1);

	(void)memcpy(pal->al_value, cvnbuf, ct);
	pal->al_flags = attr->at_flags;
	append_link(phead, &pal->al_link, pal);
	
	return (1);
}

/*
 * set_size - set attribute A to attribute B,
 *	either A=B, A += B, or A -= B
 *
 *	Returns: 0 if ok
 *		>0 if error
 */

int set_size(attr, new, op)
	struct attribute *attr;
	struct attribute *new;
	enum batch_op op;
{
	unsigned long old;
	struct size_value tmpa;	/* the two temps are used to insure that the */
	struct size_value tmpn;	/* real attributes are not changed if error  */
	int normalize_size A_((struct size_value *a, struct size_value *b,
			      struct size_value *c, struct size_value *d));

	assert ( attr && new && (new->at_flags & ATR_VFLAG_SET) );

	switch (op) {
	    case SET:	attr->at_val.at_size.atsv_num   = new->at_val.at_size.atsv_num;
	    		attr->at_val.at_size.atsv_shift = new->at_val.at_size.atsv_shift;
			attr->at_val.at_size.atsv_units = new->at_val.at_size.atsv_units;
			break;

	    case INCR:	if (normalize_size(&attr->at_val.at_size, 
			    &new->at_val.at_size, &tmpa, &tmpn) < 0)
				return (PBSE_BADATVAL);
			old  = tmpa.atsv_num;
			tmpa.atsv_num += tmpn.atsv_num;
			if (tmpa.atsv_num < old)
				return (PBSE_BADATVAL);
			attr->at_val.at_size = tmpa;
			break;

	    case DECR:	if (normalize_size(&attr->at_val.at_size, 
			    &new->at_val.at_size, &tmpa, &tmpn) < 0)
				return (PBSE_BADATVAL);
			old  = tmpa.atsv_num;
			tmpa.atsv_num -= tmpn.atsv_num;
			if (tmpa.atsv_num > old)
				return (PBSE_BADATVAL);
			attr->at_val.at_size = tmpa;
			break;

	    default:	return (PBSE_INTERNAL);
	}
	attr->at_flags |= ATR_VFLAG_SET | ATR_VFLAG_MODIFY;

	return (0);
}

/*
 * comp_size - compare two attributes of type size
 *
 *	Returns: +1 if 1st > 2nd
 *		  0 if 1st == 2nd
 *		 -1 if 1st < 2nd
 */

int comp_size(attr, with)
	struct attribute *attr;
	struct attribute *with;
{
	struct size_value tmpa;
	struct size_value tmpw;
	int normalize_size A_((struct size_value *a, struct size_value *b,
			       struct size_value *c, struct size_value *d));

	if (normalize_size(&attr->at_val.at_size, &with->at_val.at_size,
            &tmpa, &tmpw) != 0) {
		if (tmpa.atsv_shift > 
		    tmpw.atsv_shift)
			return (1);
		else if (tmpa.atsv_shift < 
		    tmpw.atsv_shift)
			return (-1);
		else 
			return (0);
	} else if (tmpa.atsv_num > tmpw.atsv_num)
		return (1);
	else if (tmpa.atsv_num < tmpw.atsv_num)
		return (-1);
	else
		return (0);

}

/*
 * free_size - use free_null to (not) free space
 */

/*
 * normalize_size - normalize two size values, adjust so the shift
 *	counts are the same.
 */

int normalize_size (a, b, ta, tb)
	struct size_value *a;
	struct size_value *b;
	struct size_value *ta;
	struct size_value *tb;
{
	int adj;
	unsigned long temp;

	/*
	 * we do the work in copies of the original attributes
	 * to preserve the original (in case of error)
	 */
	*ta = *a;
	*tb = *b;

	/* if either unit is in bytes, then both must be */

	if ((ta->atsv_units == ATR_SV_WORDSZ) &&
	    (tb->atsv_units != ATR_SV_WORDSZ)) {
		ta->atsv_num *= sizeof(int);
		ta->atsv_units = ATR_SV_BYTESZ;
	} else if ((ta->atsv_units != ATR_SV_WORDSZ) &&
		   (tb->atsv_units == ATR_SV_WORDSZ)) {
		tb->atsv_num *= sizeof(int);
		tb->atsv_units = ATR_SV_BYTESZ;
	}
		
	adj = ta->atsv_shift - tb->atsv_shift;

	if (adj > 0) {
		temp = ta->atsv_num;
		if ((adj > sizeof (int) * 8) ||
		    (((temp << adj) >> adj) != ta->atsv_num))
			return (-1);	/* would overflow */
		ta->atsv_shift = tb->atsv_shift;
		ta->atsv_num   = ta->atsv_num << adj;
	} else if (adj < 0) {
		adj = -adj;
		temp = tb->atsv_num;
		if ((adj > sizeof (int) * 8) ||
		    (((temp << adj) >> adj) != tb->atsv_num))
			return (-1);	/* would overflow */
		tb->atsv_shift = ta->atsv_shift;
		tb->atsv_num   = tb->atsv_num << adj;
	}
	return (0);
}


/* 
 * to_size - decode the value string TO a size_value structure
 *
 *	This function decodes a value string into a size_value struct.
 */

int to_size(val, psize)
	char	 *val;
	struct size_value *psize;
{
	int   havebw = 0;
	char *pc;

	psize->atsv_units = ATR_SV_BYTESZ;
	psize->atsv_num = strtol(val, &pc, 0);
	if (pc == val)		/* no numeric part */
		return (PBSE_BADATVAL);

	switch (*pc) {
	    case '\0':	break;
	    case 'k':
	    case 'K':	psize->atsv_shift = 10;
			break;
	    case 'm':
	    case 'M':	psize->atsv_shift = 20;
			break;
	    case 'g':
	    case 'G':	psize->atsv_shift = 30;
			break;
	    case 't':
	    case 'T':	psize->atsv_shift = 40;
			break;
	    case 'p':
	    case 'P':	psize->atsv_shift = 50;
			break;
	    case 'b':
	    case 'B':	havebw = 1;
			break;
	    case 'w':
	    case 'W':	havebw = 1;
			psize->atsv_units = ATR_SV_WORDSZ;
			break;
	    default:	return (PBSE_BADATVAL);	 /* invalid string */
	}
	if (*pc != '\0') 
		pc++;
	if (*pc != '\0') {
		if (havebw)
			return (PBSE_BADATVAL);  /* invalid string */
		switch (*pc) {
		    case 'b':
		    case 'B':	break;
		    case 'w':
		    case 'W':	psize->atsv_units = ATR_SV_WORDSZ;
				break;
		    default:	return (PBSE_BADATVAL);
		}
	}
	return (0);
}

/*
 * from_size - encode a string FROM a size_value structure
 */

void from_size(psize, cvnbuf)
	struct size_value *psize;
	char		  *cvnbuf;
{

	(void)sprintf(cvnbuf, "%lu", psize->atsv_num);
	switch (psize->atsv_shift) {
		case  0:	break;
		case 10:	strcat(cvnbuf, "k");
				break;
		case 20:	strcat(cvnbuf, "m");
				break;
		case 30:	strcat(cvnbuf, "g");
				break;
		case 40:	strcat(cvnbuf, "t");
				break;
		case 50:	strcat(cvnbuf, "p");
	}
	if (psize->atsv_units & ATR_SV_WORDSZ)
		strcat(cvnbuf, "w");
	else
		strcat(cvnbuf, "b");
}