attr_fn_b.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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* other than those described below, or to purchase support for this software,
* please contact Veridian Systems, PBS Products Department ("Licensor") at:
* 
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*                        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,
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* After December 31, 2001, only conditions 3-6 must be met:
* 
* 1. Commercial and/or non-commercial use of the Software is permitted
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*/
#include <pbs_config.h>   /* the master config generated by configure */

#include <assert.h>
#include <ctype.h>
#include <memory.h>
#ifndef NDEBUG
#include <stdio.h>
#endif
#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_b.c,v $ $Revision: 2.1.10.4 $";

/*
 * This file contains functions for manipulating attributes of type
 *	boolean
 *
 * Each set has functions for:
 *	Decoding the value string to the machine representation.
 *	Encoding the machine representation of the value to a string
 *	Setting the value by =, + or - operators.
 *	Comparing a (decoded) value with the attribute value.
 *	Freeing the space malloc-ed to 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"
 *
 * -------------------------------------------------------
 * Set of General functions for attributes of type boolean
 * -------------------------------------------------------
 */

static char *true_val  = ATR_TRUE;
static char *false_val = ATR_FALSE;

/*
 * decode_b - decode string into boolean attribute
 *
 *	String of "1" decodes to true, all else to false
 *	Returns: 0 if ok
 *		>0 error number if error
 *		*patr elements set
 */

int decode_b(patr, name, rescn, val)
	struct attribute *patr;
	char *name;		/* attribute name */
	char *rescn;		/* resource name, unused here */
	char *val;		/* attribute value */
{
	char *pc;

	if ((val == (char *)0) || (strlen(val) == 0)) {
		patr->at_flags = (patr->at_flags & ~ATR_VFLAG_SET) |
				 ATR_VFLAG_MODIFY;
		patr->at_val.at_long = 0;		/* default to false */
	} else {
		for (pc = val; *pc; pc++)
			*pc = (char)toupper((int)*pc);
		if ((strcmp(val, true_val) == 0) ||
		    (strcmp(val, "TRUE") == 0)   ||
		    (strcmp(val, "true") == 0)   ||
		    (strcmp(val, "t") == 0)	 ||
		    (strcmp(val, "T") == 0)	 ||
		    (strcmp(val, "1") == 0)	 ||
		    (strcmp(val, "y") == 0)	 ||
		    (strcmp(val, "Y") == 0))
			patr->at_val.at_long = 1;	/* true */
		else if ((strcmp(val, false_val) == 0) || 
			 (strcmp(val, "FALSE") == 0)   ||
			 (strcmp(val, "false") == 0)   ||
			 (strcmp(val, "f") == 0)       ||
			 (strcmp(val, "F") == 0)       ||
			 (strcmp(val, "0") == 0)       ||
			 (strcmp(val, "n") == 0)       ||
			 (strcmp(val, "N") == 0))
			patr->at_val.at_long = 0;	/* false */
		else
			return (PBSE_BADATVAL);
		patr->at_flags |= ATR_VFLAG_SET | ATR_VFLAG_MODIFY;
	}
	return (0);
}

/*
 * encode_b - encode attribute of type ATR_TYPE_LONG to attr_extern
 *
 *	Returns: >0 size of data returned to buffer
 *		 =0 if not value, no link added
 *		 <0 if error
 */
/*ARGSUSED*/

int encode_b(attr, phead, atname, rsname, mode)
	attribute	*attr;		/* ptr to attribute */
	list_head	*phead;		/* head of attribute list */
	char		*atname;	/* attribute name */
	char		*rsname;	/* resource name or null */
	int		 mode;		/* encode mode, unused here */
{
	size_t	  ct;
	svrattrl *pal;
	char	 *value;

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

	if (attr->at_val.at_long) {
		value = true_val;
	} else {
		value = false_val;
	}
	ct = strlen(value) + 1;
	
	pal = attrlist_create(atname, rsname, ct);
	if (pal == (svrattrl *)0)
		return (-1);
	strcpy(pal->al_value, value);
	pal->al_flags = attr->at_flags;

	append_link(phead, &pal->al_link, pal);
	return (1);
}

/*
 * set_b - set attribute of type ATR_TYPE_LONG
 *
 *	A=B --> A set to value of B
 *	A+B --> A = A | B  (inclusive or, turn on)
 *	A-B --> A = A & ~B  (and not, clear)
 *
 *	Returns: 0 if ok
 *		>0 if error
 */

int set_b(attr, new, op)
	struct attribute *attr;
	struct attribute *new;
	enum batch_op op;
{
	assert( attr && new && (new->at_flags & ATR_VFLAG_SET));

	switch (op) {
	    case SET:
		attr->at_val.at_long = new->at_val.at_long;
		break;

	    case INCR:
		attr->at_val.at_long = 
    		attr->at_val.at_long | new->at_val.at_long; /* "or" */
		break;

	    case DECR:
		attr->at_val.at_long = attr->at_val.at_long &
		  ~new->at_val.at_long;
		break;

	    default:	return (PBSE_INTERNAL);
	}
	attr->at_flags |= ATR_VFLAG_SET | ATR_VFLAG_MODIFY;
	return (0);
}

/* 
 * comp_b - compare two attributes of type ATR_TYPE_LONG
 *
 *	Returns: 0 if same value
 *		+1 if different value
 */

int comp_b(attr, with)
	struct attribute *attr;
	struct attribute *with;
{
	if ( !attr || !with )
		return (1);
	if ( ((attr->at_val.at_long == 0) && (with->at_val.at_long == 0)) ||
	     ((attr->at_val.at_long != 0) && (with->at_val.at_long != 0)) )
		return (0);
	else 
		return (1);
}

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