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<HTML>
<BODY BGCOLOR=white>
<PRE>
<!-- Manpage converted by man2html 3.0.1 -->
NAME
     lCreateElem, lFreeElem, lCopyElem, lAppendElem, lInsertElem,
     lDechainElem,   lFirst,  lLast,  lNext,  lPrev,  lFindFirst,
     lFindLast,  lFindNext,  lFindPrev,  lDumpElem,  lUndumpElem,
     lWriteElem, lWriteElemTo, lGetPosViaElem

     generic list element manipulation and information functions

SYNOPSIS
     #include "cull.h"

     lListElem* lCreateElem( lDescr *descriptor );

     void lFreeElem( lListElem *element );

     lListElem* lCopyElem( lListElem *source );

     lListElem* lAppendElem( lList *list, lListElem *newelem );

     lListElem* lDechainElem(
          lList* list,
          lListElem* element
     );

     lListElem* lFirst( lList* list );

     lListElem* lLast( lList* list );

     lListElem* lNext( lListElem* element );

     lListElem* lPrev( lListElem* element );

     lListElem* lFindFirst(
          lList* list,
          lCondition* condition
     );

     lListElem* lFindLast(
          lList* list,
          lCondition* condition
     );

     lListElem* lFindNext(
          lListElem* element,
          lCondition* element
     );

     lListElem* lFindPrev(
          lListElem* element,
          lCondition* element
     );

     int lDumpElem(
          FILE *file,
          lListElem *element,
          int indent,
          int number
     );

     lListElem* lUndumpElem( FILE *file, lDescr *descriptor );

     void lWriteElem( lListElem *element );

     void lWriteElemTo( lListElem *element, FILE *fp );

     int lGetPosViaElem( lListElem *element, int nm );

DESCRIPTION
     lCreateElem
          creates a new list element specified by descriptor.  In
          case  of  success,  a  pointer  to  the list element is
          returned, otherwise the return value is NULL. All  list
          element  fields are set to zero.  There is memory allo-
          cated for the list element, that must be released  with
          <I>lFreeElem</I>.

     lFreeElem
          frees the memory allocated by <I>lCreateElem</I>. If there are
          sub-list   or   string  fields  their  memory  is  also
          released. If the list element is NULL the function sim-
          ply returns.

     lCopyElem
          duplicates a list element with all  its  sub-lists  and
          strings. If an error occurs NULL is returned, otherwise
          a pointer to the copied list element is  returned.   If
          the  copied  list  element is no longer used, the allo-
          cated memory has to be released with <I>lFreeElem</I>.

     lAppendElem
          append a list element to a generic  list  as  the  last
          element.  The  first  argument is the list to which the
          new element shall be appended. The second  argument  is
          the  new  element.  Sometimes it may be useful to use a
          copy of the element to be inserted  in  the  list  (see
          <I>lCopyList</I>).

     lInsertElem
          inserts a new element after the  specified  element  in
          the  list.  The  first argument is the list, the second
          argument is the list element, after which the new  ele-
          ment  shall  be  inserted, and the third element is the
          new list element.  Sometimes it may be useful to use  a
          copy  of  the  element  to be inserted in the list (see
          <I>lCopyList</I>).

     lDechainElem
          dechains the specified element from the generic list. A
          pointer  to the list element is returned. The list ele-
          ment  is  not  destroyed.  If  it  shall  be  destroyed
          <I>lFreeElem</I> should be called.

     lFirst, lLast
          get the first/last element of the specified list. If no
          list is specified or no elements are contained, NULL is
          returned.  Otherwise a pointer to the  first/last  list
          element is returned.

     lNext, lPrev
          get the successor/predecessor of the specified element.
          If the specified element is NULL or the last/first ele-
          ment in the list, NULL is returned. Otherwise a pointer
          to the successor/predecessor is returned.

     lFindFirst, lFindLast
          find the first/last element matching the specified con-
          dition.  The  first  argument is the generic list where
          the requested  list  element  may  be  contained.   The
          second element is the condition that shall be fulfilled
          by the element. The  list  is  searched  in  the  order
          first/last  to  last/first element. If there is no ele-
          ment that matches the condition NULL  is  returned.  If
          there  is  no  list specified, the return value is also
          NULL, otherwise a pointer to  the  first/last  matching
          list element is returned.

     lFindNext, lFindPrev
          find the next/previous element matching  the  specified
          condition.  The  first  argument  is  the  list element
          returned       by        <I>lFindFirst</I>/<I>lFindLast</I>        or
          <I>lFindNext</I>/<I>lFindPrev</I>.  The second argument is the condi-
          tion which should be equal to the  one  stated  in  the
          corresponding  <I>lFindFirst</I>/<I>lFindLast</I>  call.  The  return
          value is NULL, if the specified list element is NULL or
          no  matching  element is found.  Otherwise a pointer to
          the matching list element is returned.

     lDumpElem
          dumps a list element in ASCII format  to  a  file.  The
          first  argument  is a FILE pointer, the second argument
          is the list element to be dumped, the third argument is
          the number of indentation units for formatting purposes
          and the fourth argument is the number of  the  element.
          This function is normally called by <B><A HREF="../htmlman3/lDumpList.html">lDumpList(3)</A></B>.

     lUndumpElem
          undumps a list element from  a  dump  file.  The  first
          argument is a FILE pointer of the dump file. The second
          argument is the descriptor of the list element.  If one
          or  both  of  the  function arguments are NULL, NULL is
          retuned.  Otherwise a pointer to the newly created list
          element is returned.  If the element is no longer used,
          <I>lFreeElem</I> has to be called.  This function is  normally
          called by <B><A HREF="../htmlman3/lUndumpList.html">lUndumpList(3)</A></B> only.

     lWriteElem
          writes the contents of a  list  element  with  all  its
          sub-lists  if  Monitoring  Level  CULL_LAYER  is set to
          info.  The only argument is a list element.

     lWriteElemTo
          writes the contents of a  list  element  with  all  its
          sub-lists to the stream connected with the file pointer
          fp.  The first argument is a list element,  the  second
          argument is a file pointer or NULL. If the file pointer
          is NULL, this function behaves exactly as lWriteElemTo.

     lGetPosViaElem
          get the field position of a field with name nm  in  the
          list  element element.  The position of the field named
          nm is returned. If the field does not exist in the list
          element -1 is returned.

RETURN VALUES
     In case of error the return value is -1 or NULL, otherwise 0
     or a valid pointer to the corresponding struct is returned.

ERRORS
     The following errors may occur. The affected  functions  are
     listed in parentheses.

     LECOUNTDESCR
          Counting the descriptor  length  failed.  (<I>lCreateElem</I>,
          <I>lUndumpElem</I>)

     LEMALLOC
          <B><A HREF="../htmlman3/Malloc.html">Malloc(3)</A></B> failed. (<I>lCreateElem</I>)

     LEELEMNULL
          List element is NULL.  (<I>lFreeElem</I>,  <I>lCopyElem</I>,  <I>lAppen-</I>
          <I>dElem</I>,   <I>lInsertElem</I>,  <I>lDechainElem</I>,  <I>lFindNext</I>,  <I>lWri-</I>
          <I>teElem</I>, <I>lGetPosViaElem</I>, <I>lDumpElem</I>)

     LELISTNULL
          List is NULL. (<I>lAppendElem</I>, <I>lInsertElem</I>,  <I>lDechainElem</I>,
          <I>lFindFirst</I>)

     LECREATEELEM
          Creation of a list element failed. (<I>lCopyElem</I>,  <I>lUndum-</I>
          <I>pElem</I>)

     LEFILENULL
          File pointer is NULL. (<I>lDumpElem</I>, <I>lUndumpElem</I>)

     LEDESCRNULL
          List descriptor pointer is NULL. (<I>lUndumpElem</I>)

     LECOPYSWITCH
          Copying a list element field failed. (<I>lCopyElem</I>)

     LESYNTAX
          A syntax error occurred  (missing  opening  or  closing
          brackets).  (<I>lUndumpElem</I>)

SEE ALSO
     <B><A HREF="../htmlman1/sge_intro.html">sge_intro(1)</A></B>, <B><A HREF="../htmlman3/list_intro.html">list_intro(3)</A></B>.

COPYRIGHT
     See <B><A HREF="../htmlman1/sge_intro.html">sge_intro(1)</A></B> for a full statement of rights and  permis-
     sions.






























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