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glibc/stdlib/tst-qsort2.c
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#include <stdio.h> | |
#include <stdlib.h> | |
char *array; | |
char *array_end; | |
size_t member_size; | |
int | |
compare (const void *a1, const void *b1) | |
{ | |
const char *a = a1; | |
const char *b = b1; | |
if (! (array <= a && a < array_end | |
&& array <= b && b < array_end)) | |
{ | |
puts ("compare arguments not inside of the array"); | |
exit (EXIT_FAILURE); | |
} | |
int ret = b[0] - a[0]; | |
if (ret) | |
return ret; | |
if (member_size > 1) | |
return b[1] - a[1]; | |
return 0; | |
} | |
int | |
test (size_t nmemb, size_t size) | |
{ | |
array = malloc (nmemb * size); | |
if (array == NULL) | |
{ | |
printf ("%zd x %zd: no memory", nmemb, size); | |
return 1; | |
} | |
array_end = array + nmemb * size; | |
member_size = size; | |
char *p; | |
size_t i; | |
size_t bias = random (); | |
for (i = 0, p = array; i < nmemb; i++, p += size) | |
{ | |
p[0] = (char) (i + bias); | |
if (size > 1) | |
p[1] = (char) ((i + bias) >> 8); | |
} | |
qsort (array, nmemb, size, compare); | |
for (i = 0, p = array; i < nmemb - 1; i++, p += size) | |
{ | |
if (p[0] < p[size] | |
|| (size > 1 && p[0] == p[size] && p[1] < p[size + 1])) | |
{ | |
printf ("%zd x %zd: failure at offset %zd\n", nmemb, | |
size, i); | |
free (array); | |
return 1; | |
} | |
} | |
free (array); | |
return 0; | |
} | |
int | |
main (int argc, char **argv) | |
{ | |
int ret = 0; | |
if (argc >= 3) | |
ret |= test (atoi (argv[1]), atoi (argv[2])); | |
else | |
{ | |
ret |= test (10000, 1); | |
ret |= test (200000, 2); | |
ret |= test (2000000, 3); | |
ret |= test (2132310, 4); | |
ret |= test (1202730, 7); | |
ret |= test (1184710, 8); | |
ret |= test (272710, 12); | |
ret |= test (14170, 32); | |
ret |= test (4170, 320); | |
} | |
return ret; | |
} |