JudySL_funcs man page on HP-UX

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JudySL_funcs(3X)					      JudySL_funcs(3X)

       JudySL  functions  -  C	library	 for  creating and accessing a dynamic
       array, using a null-terminated string as an index (associative array)

       PPvoid_t JudySLIns(	PPvoid_t PPJSLArray, const char * Index, PJError_t PJError);
       int	JudySLDel(	PPvoid_t PPJSLArray, const char * Index, PJError_t PJError);
       PPvoid_t JudySLGet(	Pcvoid_t  PJSLArray, const char * Index, PJError_t PJError);
       Word_t	JudySLFreeArray(PPvoid_t PPJSLArray, PJError_t PJError);
       PPvoid_t JudySLFirst(	Pcvoid_t  PJSLArray,	   char * Index, PJError_t PJError);
       PPvoid_t JudySLNext(	Pcvoid_t  PJSLArray,	   char * Index, PJError_t PJError);
       PPvoid_t JudySLLast(	Pcvoid_t  PJSLArray,	   char * Index, PJError_t PJError);
       PPvoid_t JudySLPrev(	Pcvoid_t  PJSLArray,	   char * Index, 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	JudySL
       functions.   See	 JudySL(3X)  for  more information.  The function call
       definitions are included here for completeness.

       One of the difficulties in using the  JudySL  function  calls  lies  in
       determining  whether  to	 pass  a  pointer or the address of a pointer.
       Since the functions that modify the JudySL array must also  modify  the
       pointer	to  the JudySL 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  JudySL  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 JudySL functions when an error occurs.

       Notice the placement of the & in the different functions.

			     #define JSLI(PValue, PJSLArray, Index) \
			 PValue = JudyLIns(&PJSLArray, Index, PJE0)

			     #define JSLD(Rc_int, PJSLArray, Index) \
			 Rc_int = JudySLDel(&PJSLArray, Index, PJE0)

			     #define JSLG(PValue, PJSLArray, Index) \
			 PValue = JudySLIns(PJSLArray, Index, PJE0)

			     #define JSLFA(Rc_word, PJSLArray) \
			 Rc_word = JudySLFreeArray(&PJSLArray, PJE0)

			     #define JSLF(PValue, PJSLArray, Index) \
			 PValue = JudySLFirst(PJSLArray, Index, PJE0)

			     #define JSLN(PValue, PJSLArray, Index) \
			 PValue = JudySLNext(PJSLArray, Index, PJE0)

			     #define JSLL(PValue, PJSLArray, Index) \
			 PValue = JudySLLast(PJSLArray, Index, PJE0)

			     #define JSLP(PValue, PJSLArray, Index) \
			 PValue = JudySLPrev(PJSLArray, Index, PJE0)

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


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