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Replace isnan() and isinf() with inline tests so uClibc doesn't want us to

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link sort against libm.  This adds 22 bytes for glibc but is a win for uClibc,
and since glibc is bigger than all of busybox it seems kind of silly to worry
about it.
This commit is contained in:
Rob Landley 2006-05-09 23:14:39 +00:00
parent c503df5bdd
commit f893250a3b
1 changed files with 8 additions and 6 deletions
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14
coreutils/sort.c
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@ -176,12 +176,14 @@ static int compare_keys(const void *xarg, const void *yarg)
/* not numbers < NaN < -infinity < numbers < +infinity) */
if(x==xx) retval=(y==yy ? 0 : -1);
else if(y==yy) retval=1;
else if(isnan(dx)) retval=isnan(dy) ? 0 : -1;
else if(isnan(dy)) retval=1;
else if(isinf(dx)) {
if(dx<0) retval=((isinf(dy) && dy<0) ? 0 : -1);
else retval=((isinf(dy) && dy>0) ? 0 : 1);
} else if(isinf(dy)) retval=dy<0 ? 1 : -1;
/* Check for isnan */
else if(dx != dx) retval = (dy != dy) ? 0 : -1;
else if(dy != dy) retval = 1;
/* Check for infinity. Could underflow, but it avoids libm. */
else if(1.0/dx == 0.0) {
if(dx<0) retval=((1.0/dy == 0.0 && dy<0) ? 0 : -1);
else retval=((1.0/dy == 0.0 && dy>0) ? 0 : 1);
} else if(1.0/dy == 0.0) retval=dy<0 ? 1 : -1;
else retval=dx>dy ? 1 : (dx<dy ? -1 : 0);
break;
}