/*___INFO__MARK_BEGIN__*/
/*************************************************************************
 * 
 *  The Contents of this file are made available subject to the terms of
 *  the Sun Industry Standards Source License Version 1.2
 * 
 *  Sun Microsystems Inc., March, 2001
 * 
 * 
 *  Sun Industry Standards Source License Version 1.2
 *  =================================================
 *  The contents of this file are subject to the Sun Industry Standards
 *  Source License Version 1.2 (the "License"); You may not use this file
 *  except in compliance with the License. You may obtain a copy of the
 *  License at http://gridengine.sunsource.net/Gridengine_SISSL_license.html
 * 
 *  Software provided under this License is provided on an "AS IS" basis,
 *  WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING,
 *  WITHOUT LIMITATION, WARRANTIES THAT THE SOFTWARE IS FREE OF DEFECTS,
 *  MERCHANTABLE, FIT FOR A PARTICULAR PURPOSE, OR NON-INFRINGING.
 *  See the License for the specific provisions governing your rights and
 *  obligations concerning the Software.
 * 
 *   The Initial Developer of the Original Code is: Sun Microsystems, Inc.
 * 
 *   Copyright: 2001 by Sun Microsystems, Inc.
 * 
 *   All Rights Reserved.
 * 
 ************************************************************************/
/*___INFO__MARK_END__*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>

/* do not compile in monitoring code */
#ifndef NO_SGE_COMPILE_DEBUG
#define NO_SGE_COMPILE_DEBUG
#endif

#include "sgermon.h"
#include "cull_listP.h"
#include "cull_parse.h"
#include "cull_multitype.h"
#include "cull_sortP.h"
#include "cull_lerrnoP.h"
#include "sge_string.h"

/* ------------------------------------------------------------ 

   insert ep into sorted list lp using so as sort order

 */
int lInsertSorted(const lSortOrder * so, lListElem * ep, lList * lp)
{
   lListElem *tmp;

   DENTER(TOP_LAYER, "lInsertSorted");

   if (!so || !ep || !lp) {
      DEXIT;
      return -1;
   }

   for_each(tmp, lp)
      if (lSortCompare(ep, tmp, so) <= 0)
      break;                    /* insert before tmp */

   if (tmp) {
      /* insert before tmp */
      tmp = lPrev(tmp);
      lInsertElem(lp, tmp, ep);

   }
   else {
      /* append to list */
      lAppendElem(lp, ep);
   }

   DEXIT;
   return 0;
}

int lResortElem(const lSortOrder * so, lListElem * ep, lList * lp)
{
   lDechainElem(lp, ep);
   lInsertSorted(so, ep, lp);
   return 0;
}

/* ------------------------------------------------------------ 

   writes a sort order (for debugging purposes)

 */
void lWriteSortOrder(
const lSortOrder *sp 
) {
   int i;

   DENTER(CULL_LAYER, "lWriteSortOrder");

   if (!sp) {
      LERROR(LESORTORDNULL);
      return;
   }

   for (i = 0; sp[i].mt != lEndT; i++) {
      DPRINTF(("nm: %d mt: %d pos: %d asc/desc: %d\n", sp[i].nm, sp[i].mt,
               sp[i].pos, sp[i].ad));
   }

   DEXIT;
}

/* ----------------------------------------

   wrapper function adding global_sort_order
   to the passed parameters and calls
   lSortCompare()

 */
int lSortCompareUsingGlobal(const void *ep0, const void *ep1)
{
   return lSortCompare(*(lListElem **) ep0, *(lListElem **) ep1, cull_state_get_global_sort_order());
}

/* ------------------------------------------------------------ 

   compares two elementes ep0 and ep1 due to a given sort
   order sp 

   returns compare values like strcmp:

   <  -1 
   == 0 
   >  1 

 */
int lSortCompare(
const lListElem *ep0,
const lListElem *ep1,
const lSortOrder *sp 
) {
   int i, result = 0;

   DENTER(CULL_LAYER, "lSortCompare");

   for (i = 0; !result && sp[i].nm != NoName; i++) {

      switch (mt_get_type(sp[i].mt)) {
      case lIntT:
         result = intcmp(lGetPosInt(ep0, sp[i].pos), lGetPosInt(ep1, sp[i].pos));
         break;
      case lStringT:
         result = sge_strnullcmp(lGetPosString(ep0, sp[i].pos), lGetPosString(ep1, sp[i].pos));
         break;
      case lHostT:
         result = sge_strnullcmp(lGetPosHost(ep0, sp[i].pos), lGetPosHost(ep1, sp[i].pos));
         break;
      case lUlongT:
         result = ulongcmp(lGetPosUlong(ep0, sp[i].pos), lGetPosUlong(ep1, sp[i].pos));
         break;
      case lFloatT:
         result = floatcmp(lGetPosFloat(ep0, sp[i].pos), lGetPosFloat(ep1, sp[i].pos));
         break;
      case lDoubleT:
         result = doublecmp(lGetPosDouble(ep0, sp[i].pos), lGetPosDouble(ep1, sp[i].pos));
         break;
      case lLongT:
         result = longcmp(lGetPosLong(ep0, sp[i].pos), lGetPosLong(ep1, sp[i].pos));
         break;
      case lBoolT:
         result = boolcmp(lGetPosBool(ep0, sp[i].pos), lGetPosBool(ep1, sp[i].pos));
         break;
      case lCharT:
         result = charcmp(lGetPosChar(ep0, sp[i].pos), lGetPosChar(ep1, sp[i].pos));
         break;
      case lRefT:
         result = refcmp(lGetPosRef(ep0, sp[i].pos), lGetPosRef(ep1, sp[i].pos));
         break;
      default:
         unknownType("lSortCompare");
      }
      result *= sp[i].ad;
   }

   DEXIT;
   return result;
}

lSortOrder *lParseSortOrderVarArg(const lDescr *dp, const char *fmt,...)
{
   va_list ap;

   va_start(ap, fmt);
   return lParseSortOrder(dp, fmt, ap);
}

/****** cull/sort/lParseSortOrder() *******************************************
*  NAME
*     lParseSortOrder() -- Creates a sort order array 
*
*  SYNOPSIS
*     lSortOrder* lParseSortOrder(const lDescr *dp, const char *fmt, 
*                                 va_list ap) 
*
*  FUNCTION
*     Create a sort oder array due to the given va_list. 
*
*  INPUTS
*     const lDescr *dp - descriptor 
*     const char *fmt  - format string
*                        %d - int
*                        %s - char*
*                        %u - ulong
*                        +  - ascending
*                        -  - descending 
*     va_list ap       - Attributes within descriptor 
*
*  RESULT
*     lSortOrder* - sort order array 
*
*  EXAMPLE
*     lParseSortOrder(dp,"%s+ %d-", H_hostname, H_memsize )
*     
*     Returns a sort order array which can be used for sorting an list
*     with ascending H_hostname and descending H_memsize. 
*******************************************************************************/
lSortOrder *lParseSortOrder(const lDescr *dp, const char *fmt, va_list ap) 
{
   const char *s;
   lSortOrder *sp;
   int i, n;
   cull_parse_state state;

   DENTER(CULL_LAYER, "lParseSortOrder");

   if (!dp || !fmt) {
      return NULL;
   }

   /* how many fields are selected (for malloc) */
   for (n = 0, s = fmt; *s; s++)
      if (*s == '%')
         n++;

   if (!(sp = (lSortOrder *) malloc(sizeof(lSortOrder) * (n + 1)))) {
      LERROR(LEMALLOC);
      return NULL;
   }

   memset(&state, 0, sizeof(state));
   scan(fmt, &state);                   /* Initialize scan */
   for (i = 0; i < n; i++) {
      sp[i].nm = va_arg(ap, int);
      if ((sp[i].pos = lGetPosInDescr(dp, sp[i].nm)) < 0) {;
         free(sp);
         LERROR(LENAMENOT);
         return NULL;
      }
      sp[i].mt = dp[sp[i].pos].mt;

      /* next token */
      if (scan(NULL, &state) != FIELD) {
         free(sp);
         LERROR(LESYNTAX);
         return NULL;
      }
      /* THIS IS FOR TYPE CHECKING */
      /* COMMENTED OUT
         switch( scan(NULL, &state) ) {
         case INT:
         if (mt_get_type(sp[i].mt) != lIntT )
         incompatibleType("lSortList (should be a lIntT)\n");
         break;

         case STRING:
         if (mt_get_type(sp[i].mt) !=lStringT )
         incompatibleType("lSortList (should be a lStringT)\n");
         break;

         case ULONG:
         if (mt_get_type(sp[i].mt) !=lUlongT )
         incompatibleType("lSortList (should be a lUlongT)\n");
         break;

         case SUBLIST:
         if (mt_get_type(sp[i].mt) !=lListT )
         incompatibleType("lSortList (should be a lListT)\n");
         break;
         case FLOAT:
         if (mt_get_type(sp[i].mt) !=lFloatT )
         incompatibleType("lSortList (should be a lFloatT)\n");
         break;
         case DOUBLE:
         if (mt_get_type(sp[i].mt) !=lDoubleT )
         incompatibleType("lSortList (should be a lDoubleT)\n");
         break;
         case LONG:
         if (mt_get_type(sp[i].mt) !=lLongT )
         incompatibleType("lSortList (should be a lLongT)\n");
         break;
         case CHAR:
         if (mt_get_type(sp[i].mt) !=lCharT )
         incompatibleType("lSortList (should be a lCharT)\n");
         break;

         default:
         free( sp );
         unknownType("lSortList");
         } 
       */
      eat_token(&state);              /* eat %I */
      switch (scan(NULL, &state)) {
      case PLUS:
         sp[i].ad = 1;
         break;
      case MINUS:
         sp[i].ad = -1;
         break;
      default:
         /* +/- is missing */
         free(sp);
         LERROR(LESYNTAX);
         return NULL;
      }
      eat_token(&state);
   }
   sp[n].nm = NoName;
   sp[n].mt = lEndT;

   DEXIT;

   return sp;
}

lSortOrder *lFreeSortOrder(
lSortOrder *so 
) {
   if (so)
      free(so);
   return NULL;
}


lSortOrder *lCreateSortOrder(
int n 
) {
   lSortOrder *sp;

   if (!(sp = (lSortOrder *) malloc(sizeof(lSortOrder) * (n + 1)))) {
      LERROR(LEMALLOC);
      return NULL;
   }

   /* set end mark at pos 0 */
   sp[0].nm = NoName;

   return sp;
}


int lAddSortCriteria(
const lDescr *dp,
lSortOrder *so,
int nm,
int up_down_flag 
) {
   int i;

   /* search next index for insert */
   for (i=0; so[i].nm != NoName; i++)
      ;

   /* use nm to get type and and pos of field in descr dp of list and append new sort criteria */
   so[i].nm = nm;
   so[i].ad = up_down_flag;
   if ((so[i].pos = lGetPosInDescr(dp, so[i].nm)) < 0)
      return -1;

   so[i].mt = dp[so[i].pos].mt;

   /* set end mark */
   i++;
   so[i].nm = NoName;

   return 0;
}

