SysBinarySearch and search function

[Thomas Ward]

Hi everyone,

Has anybody been able to make SysBinarySearch work? This is what I have:

GLOBAL:

typedef struct {
   ULong         id;
   int           order;
   } sort_element;

sort_element     *pp_array;

IN A SUBROUTINE:

ULong  searchpos;
(void) SysBinarySearch(&pp_array, (UInt) count, (UInt) sizeof(sort_element),
                       (SearchFuncPtr) &search_routine,
                       &id, (ULong) 0, &searchpos, false);

Right before this call, I've verified that the pp_array contains the proper
values, and that the COUNT variable is correct.

MY SEARCH ROUTINE:

static int search_routine(const VoidPtr searchData,
                          const VoidPtr arrayData, Long other) {
   ULong search, data;
   int   answer;
CALLBACK_PROLOGUE

   search = *((ULong *) searchData);
   data = (*(sort_element *)arrayData)->id;

   if (search < data)
      answer = -1;
   else if (search > data)
      answer = 1;
   else
      answer = 0;

CALLBACK_EPILOGUE
   return answer;
   }

The SEARCH variable contains the correct value, but the value in DATA is
always wrong. Can anybody tell me what I'm doing wrong? (I have a feeling
it's the assignment statement DATA = ... that's the problem.)

TIA,

Tom Ward