153   UInt32 backPrev;  member
872 #define MakeAsChar(p) (p)->backPrev = (UInt32)(-1); (p)->prev1IsChar = False;
873 #define MakeAsShortRep(p) (p)->backPrev = 0; (p)->prev1IsChar = False;
874 #define IsShortRep(p) ((p)->backPrev == 0)
914   UInt32 backMem = p->opt[cur].backPrev;  in Backward()
926         p->opt[posMem - 1].backPrev = p->opt[cur].backPrev2;  in Backward()
933       backMem = p->opt[posPrev].backPrev;  in Backward()
936       p->opt[posPrev].backPrev = backCur;  in Backward()
942   *backRes = p->opt[0].backPrev;  in Backward()
961     *backRes = opt->backPrev;  in GetOptimum()
1057     *backRes = p->opt[1].backPrev;  in GetOptimum()
1085         opt->backPrev = i;  in GetOptimum()
1120         opt->backPrev = distance + LZMA_NUM_REPS;  in GetOptimum()
1204         pos = curOpt->backPrev;  in GetOptimum()
1265     if (matchByte == curByte && !(nextOpt->posPrev < cur && nextOpt->backPrev == 0))  in GetOptimum()
1319             opt->backPrev = 0;  in GetOptimum()
1351           opt->backPrev = repIndex;  in GetOptimum()
1398                 opt->backPrev = 0;  in GetOptimum()
1445           opt->backPrev = curBack + LZMA_NUM_REPS;  in GetOptimum()
1487                 opt->backPrev = 0;  in GetOptimum()