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distance routine improved a little; still not safe!

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This commit is contained in:
ceriel 1988-06-22 16:22:07 +00:00
parent d49fb42d47
commit c146e278fc
1 changed files with 4 additions and 2 deletions
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6
mach/proto/ncg/subr.c
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@ -282,6 +282,7 @@ distance(cindex) {
int tokexp,tpl; int tokexp,tpl;
int expsize,toksize,exact; int expsize,toksize,exact;
int xsekt=0; int xsekt=0;
int fromstackneeded=0;
bp = &coderules[cindex]; bp = &coderules[cindex];
#ifndef NDEBUG #ifndef NDEBUG
@ -305,6 +306,7 @@ distance(cindex) {
if (stackheight < tpl) { if (stackheight < tpl) {
if (xsekt) if (xsekt)
return(MAXINT); return(MAXINT);
fromstackneeded = tpl - stackheight;
tpl = stackheight; tpl = stackheight;
} else } else
if (stackheight != tpl && xsekt==2) if (stackheight != tpl && xsekt==2)
@ -325,12 +327,12 @@ distance(cindex) {
} else } else
exact++; exact++;
} }
if (exact==tpl) { if (exact==tpl && ! fromstackneeded) {
if (xsekt) if (xsekt)
return(0); return(0);
return(10-exact); return(10-exact);
} }
return(20-exact); return(20-exact+fromstackneeded);
} }
unsigned costcalc(cost) cost_t cost; { unsigned costcalc(cost) cost_t cost; {