Category : C Source Code
Archive   : HEAPMAN.ZIP
Filename : FINDNEXT.C

#include "mm.h"

void FindNext(LastHighest)
long *LastHighest;

/*
Finds the next lowest adrs in mpt based on the present value of
LastHighest. Additionally, it rets either an adrs or a nil value if
the table search is exhausted.

calling params:
last highest adrs in table

return params:
next lowest hndl adrs in mpt
Author: Byro
Creation: 01/10/91
Modified: 01/31/91
Revision:

*/

{
int i;
long evenLower = ZERO,
nextLowest = ZERO,
temp = ZERO,
*thisHndl = NIL;
unsigned long myTemp;

extern long gMPTsize,
*gTableSizeCountAdrs,
*gTopOfHeap;

/* Debugger(); */
if (*LastHighest == A_HIGH_NUMBER) /* hndls init cond */
{
myTemp = (unsigned long) gTopOfHeap + 1;
*LastHighest = myTemp;
}

for (i = 1; i <= gMPTsize; i++)
{
myTemp = (unsigned long) gTableSizeCountAdrs + (i * BYTE_OFFSET);
thisHndl = (long *) myTemp;

if ((*thisHndl < *LastHighest) && (*thisHndl != NIL))
evenLower = (long) *thisHndl;

if (nextLowest < evenLower) /* swap */
{
temp = nextLowest;
nextLowest = evenLower;
evenLower = temp;
}
}
*LastHighest = nextLowest;
}