/*
*         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  +1 650 967-4675                  sales@OpenPBS.org
*                        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>
#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"
#include "pbs_helper.h"

/*
 * This file contains functions for manipulating attributes
 * character, a single
 *
 * Each set has functions for:
 * Decoding the value string to the machine representation.
 * Encoding the machine representation of the pbs_attribute to external form
 * Setting the value by =, + or - operators.
 * Comparing a (decoded) value with the pbs_attribute value.
 *
 * Some or all of the functions for an pbs_attribute type may be shared with
 * other pbs_attribute types.
 *
 * The prototypes are declared in "attribute.h"
 *
 * --------------------------------------------------
 * The Set of pbs_Attribute Functions for attributes with
 * value type "char"
 * --------------------------------------------------
 */

/*
 * decode_c - decode first character of string into pbs_attribute structure
 *
 * Returns: 0 if ok
 *  >0 error number if error
 *  *patr elements set
 */

int decode_c(

  pbs_attribute *patr,
  const char * UNUSED(name),  /* pbs_attribute name */
  const char * UNUSED(rescn),  /* resource name, unused here */
  const char    *val,  /* pbs_attribute value */
  int          UNUSED(perm)) /* only used for resources */

  {
  if ((val == (char *)0) || (strlen(val) == 0))
    {
    patr->at_flags = (patr->at_flags & ~ATR_VFLAG_SET) |
                     ATR_VFLAG_MODIFY;
    patr->at_val.at_char = '\0';
    }
  else
    {
    patr->at_flags |= ATR_VFLAG_SET | ATR_VFLAG_MODIFY;
    patr->at_val.at_char = *val;
    }

  return (0);
  }

/*
 * encode_c - encode pbs_attribute of type character into attr_extern
 *
 * Returns: >0 if ok
 *   =0 if no value, no link entry created
 *   <0 if error
 */
/*ARGSUSED*/

int encode_c(

  pbs_attribute  *attr,   /* ptr to pbs_attribute */
  tlist_head     *phead,  /* head of attrlist list */
  const char    *atname, /* pbs_attribute name */
  const char    *rsname, /* resource name or null */
  int            UNUSED(mode),   /* encode mode, unused here */
  int            UNUSED(perm))   /* only used for resources */

  {

  svrattrl *pal;

  if (!attr)
    return (-1);

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

  pal = attrlist_create(atname, rsname, 2);

  if (pal == (svrattrl *)0)
    return (-1);

  *pal->al_value   = attr->at_val.at_char;

  pal->al_flags = attr->at_flags;

  append_link(phead, &pal->al_link, pal);

  return (1);
  }

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

int set_c(
   
  pbs_attribute *attr,
  pbs_attribute *new_attr,
  enum batch_op  op)
  {
  assert(attr && new_attr && (new_attr->at_flags & ATR_VFLAG_SET));

  switch (op)
    {

    case SET:
      attr->at_val.at_char = new_attr->at_val.at_char;
      break;

    case INCR:
      attr->at_val.at_char =
        (char)((int)attr->at_val.at_char +
               (int)new_attr->at_val.at_char);
      break;

    case DECR:
      attr->at_val.at_char =
        (char)((int)attr->at_val.at_char -
               (int)new_attr->at_val.at_char);
      break;

    default:
      return (PBSE_INTERNAL);
    }

  attr->at_flags |= ATR_VFLAG_SET | ATR_VFLAG_MODIFY;

  return (0);
  }

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

int comp_c(
    
  pbs_attribute *attr,
  pbs_attribute *with)

  {
  if (!attr || !with)
    return (-1);

  if (attr->at_val.at_char < with->at_val.at_char)
    return (-1);
  else if (attr->at_val.at_char >  with->at_val.at_char)
    return (1);
  else
    return (0);
  }

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

