Package: manpages-dev
Version: 2.22-1
Severity: wishlist
Tags: upstream patch
Included is a sample program that demonstrates how to sort IEEE
floating point values, including NAN and friends, in a useful way;
please consider including it.
// make CFLAGS='-W -Wall -O3 -g -std=gnu99' LDFLAGS=-lm fpnansort
#include <math.h>
#include <stdlib.h>
#include <stdio.h>
#include <assert.h>
int fpcomp(const void *a, const void *b)
{
double x=*(double *)a,
y=*(double *)b;
if (x<y) return -1;
else if (x>y) return 1;
// The not-normal values will be grouped together, but
// otherwise unordered:
else if (!isnormal(x)) return 1;
else if (!isnormal(y)) return -1;
assert(x==y);
return 0;
}
int main(int argc, char *argv[])
{
int i;
double *fp;
if (argc==1) {
fprintf(stderr, "Usage: %s <val>...\n", argv[0]);
exit(EXIT_FAILURE);
} else if ((fp=malloc((argc-1)*sizeof(*fp)))==NULL) {
perror("malloc");
exit(EXIT_FAILURE);
}
for (i=1; i<argc; i++)
fp[i-1]=strtod(argv[i], NULL);
qsort(fp, argc-1, sizeof(*fp), &fpcomp);
for (i=0; i<argc-1; i++)
printf("%lf\n", fp[i]);
free(fp);
exit(EXIT_SUCCESS);
}
--
To UNSUBSCRIBE, email to [EMAIL PROTECTED]
with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]
