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#include <ccan/tally/tally.c>
#include <ccan/tap/tap.h>
int main(void)
{
struct tally *tally;
ssize_t total, overflow;
ssize_t min, max;
max = (ssize_t)~(1ULL << (sizeof(max)*CHAR_BIT - 1));
min = (ssize_t)(1ULL << (sizeof(max)*CHAR_BIT - 1));
plan_tests(15);
/* Simple case. */
tally = tally_new(0);
tally_add(tally, min);
ok1(tally_total(tally, NULL) == min);
ok1(tally_total(tally, &overflow) == min);
ok1(overflow == -1);
/* Underflow. */
tally_add(tally, min);
total = tally_total(tally, &overflow);
ok1(overflow == -1);
ok1((size_t)total == 0);
ok1(tally_total(tally, NULL) == min);
free(tally);
/* Simple case. */
tally = tally_new(0);
tally_add(tally, max);
ok1(tally_total(tally, NULL) == max);
ok1(tally_total(tally, &overflow) == max);
ok1(overflow == 0);
/* Overflow into sign bit... */
tally_add(tally, max);
total = tally_total(tally, &overflow);
ok1(overflow == 0);
ok1((size_t)total == (size_t)-2);
ok1(tally_total(tally, NULL) == max);
/* Overflow into upper size_t. */
tally_add(tally, max);
total = tally_total(tally, &overflow);
ok1(overflow == 1);
if (sizeof(size_t) == 4)
ok1((size_t)total == 0x7FFFFFFD);
else if (sizeof(size_t) == 8)
ok1((size_t)total == 0x7FFFFFFFFFFFFFFDULL);
ok1(tally_total(tally, NULL) == max);
free(tally);
return exit_status();
}
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