JudyL_funcs man page on HP-UX

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JudyL_funcs(3X)						       JudyL_funcs(3X)

       JudyL  functions - C library for creating and accessing a dynamic array
       of words, using any value of a word as an index

       PPvoid_t JudyLIns(	PPvoid_t PPJLArray, Word_t    Index, PJError_t PJError);
       int	JudyLDel(	PPvoid_t PPJLArray, Word_t    Index, PJError_t PJError);
       PPvoid_t JudyLGet(	Pcvoid_t  PJLArray, Word_t    Index, PJError_t PJError);
       Word_t	JudyLCount(	Pcvoid_t  PJLArray, Word_t    Index1, Word_t	Index2, PJError_t PJError);
       PPvoid_t JudyLByCount(	Pcvoid_t  PJLArray, Word_t    Nth,  Word_t * PIndex,  PJError_t PJError);
       Word_t	JudyLFreeArray( PPvoid_t PPJLArray, PJError_t PJError);
       Word_t	JudyLMemUsed(	Pcvoid_t  PJLArray);
       PPvoid_t JudyLFirst(	Pcvoid_t  PJLArray, Word_t * PIndex, PJError_t PJError);
       PPvoid_t JudyLNext(	Pcvoid_t  PJLArray, Word_t * PIndex, PJError_t PJError);
       PPvoid_t JudyLLast(	Pcvoid_t  PJLArray, Word_t * PIndex, PJError_t PJError);
       PPvoid_t JudyLPrev(	Pcvoid_t  PJLArray, Word_t * PIndex, PJError_t PJError);
       int	JudyLFirstEmpty(Pcvoid_t  PJLArray, Word_t * PIndex, PJError_t PJError);
       int	JudyLNextEmpty( Pcvoid_t  PJLArray, Word_t * PIndex, PJError_t PJError);
       int	JudyLLastEmpty( Pcvoid_t  PJLArray, Word_t * PIndex, PJError_t PJError);
       int	JudyLPrevEmpty( Pcvoid_t  PJLArray, Word_t * PIndex, PJError_t PJError);

       A macro equivalent exists for each function call.   Because  the	 macro
       forms  are  faster and have a simpler error handling interface than the
       equivalent functions, they are the preferred way of calling  the	 JudyL
       functions.  See JudyL(3X) for more information.	The function call def‐
       initions are included here for completeness.

       One of the difficulties in using	 the  JudyL  function  calls  lies  in
       determining  whether  to	 pass  a  pointer or the address of a pointer.
       Since the functions that modify the JudyL array must  also  modify  the
       pointer	to  the	 JudyL array, you must pass the address of the pointer
       rather than the pointer itself.	This often leads to hard-to-debug pro‐
       grammatic  errors.  In practice, the macros allow the compiler to catch
       programming errors when pointers instead of addresses of	 pointers  are

       The  JudyL  function  calls  have  an additional parameter beyond those
       specified in the macro calls.  This parameter is either a pointer to an
       error  structure, or NULL (in which case the detailed error information
       is not returned).

       In the following descriptions, the functions are described in terms  of
       how  the	 macros use them (only in the case of #define JUDYERROR_NOTEST
       1).  This is the suggested use of the macros  after  your  program  has
       been fully debugged.  When the JUDYERROR_NOTEST macro is not specified,
       an error structure is declared to store error information returned from
       the JudyL functions when an error occurs.

       Notice the placement of the & in the different functions.

			     #define JLI(PValue, PJLArray, Index)  \
			 PValue = JudyLIns(&PJLArray, Index, PJE0)

			     #define JLD(Rc_int, PJLArray, Index)  \
			 Rc_int = JudyLDel(&PJLArray, Index, PJE0)

			     #define JLG(PValue, PJLArray, Index)  \
			 PValue = JudyLGet(PJLArray, Index, PJE0)

			     #define JLC(Rc_word, PJLArray, Index1, Index2)  \
			 Rc_word = JudyLCount(PJLArray, Index1, Index2, PJE0)

			     #define JLBC(PValue, PJLArray, Nth, Index) \
			 PValue = JudyLByCount(PJLArray, Nth, &Index, PJE0)

			     #define JLFA(Rc_word, PJLArray) \
			 Rc_word = JudyLFreeArray(&PJLArray, PJE0)

			     #define JLMU(Rc_word, PJLArray) \
			 Rc_word = JudyLMemUsed(PJLArray)

			     #define JLF(PValue, PJLArray, Index) \
			 PValue = JudyLFirst(PJLArray, &Index, PJEO)

			     #define JLN(PValue, PJLArray, Index) \
			 PValue = JudyLNext(PJLArray, &Index, PJEO)

			     #define JLL(PValue, PJLArray, Index) \
			 PValue = JudyLLast(PJLArray, &Index, PJEO)

			     #define JLP(PValue, PJLArray, Index) \
			 PValue = JudyLPrev(PJLArray, &Index, PJEO)

			     #define JLFE(Rc_int, PJLArray, Index) \
			 Rc_int = JudyLFirstEmpty(PJLArray, &Index, PJEO)

			     #define JLNE(Rc_int, PJLArray, Index) \
			 Rc_int = JudyLNextEmpty(PJLArray, &Index, PJEO)

			     #define JLLE(Rc_int, PJLArray, Index) \
			 Rc_int = JudyLLastEmpty(PJLArray, &Index, PJEO)

			     #define JLPE(Rc_int, PJLArray, Index) \
			 Rc_int = JudyLPrevEmpty(PJLArray, &Index, PJEO)

       Definitions  for	 all  the Judy functions, the types Pvoid_t, Pcvoid_t,
       PPvoid_t,  Word_t,  JError_t,  and  PJError_t,  the   constants	 NULL,
       JU_ERRNO_*,  JERR,  PPJERR, and PJE0, are provided in the Judy.h header
       file (/usr/include/Judy.h).  Note:  Callers should define JudyL	arrays
       as  type	 Pvoid_t,  which can be passed by value to functions that take
       Pcvoid_t (constant Pvoid_t), and also by address to functions that take

       The  return type from most JudyL functions is PPvoid_t so that the val‐
       ues stored in the array can be pointers to other objects,  which	 is  a
       typical	usage,	or  cast  to  a	 Word_t * when a pointer to a value is
       required instead of a pointer to a pointer.

       Judy was invented and implemented by Hewlett-Packard.

       Judy(3X),   Judy1(3X),	 Judy1_funcs(3X),    JudyL(3X),	   JudySL(3X),
       the  Judy website, http://www.hp.com/go/judy/, for more information and
       Application Notes.


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