return 0;
}
assert(step_bits < SIZET_BITS);
- return (size_t)(val - min) >> step_bits;
+ return ((size_t)val - (size_t)min) >> step_bits;
}
/* Return the min value in bucket b. */
return min;
}
assert(step_bits < SIZET_BITS);
- return min + ((ssize_t)b << step_bits);
+ return min + ((size_t)b << step_bits);
}
/* Does shifting by this many bits truncate the number? */
if (bits == 0) {
return false;
}
+ if (bits >= SIZET_BITS) {
+ return true;
+ }
return ((num << bits) >> 1) != (num << (bits - 1));
}
/* If we don't have sufficient range, increase step bits until
* buckets cover entire range of ssize_t anyway. */
- range = (new_max - new_min) + 1;
+ range = ((size_t)new_max - (size_t)new_min) + 1;
while (!shift_overflows(tally->buckets, tally->step_bits)
&& range > ((size_t)tally->buckets << tally->step_bits)) {
/* Collapse down. */
memset(tally->counts, 0, sizeof(tally->counts[0]) * old_min);
/* If we moved boundaries, adjust buckets to that ratio. */
- spill = (tally->min - new_min) % (1 << tally->step_bits);
- for (i = 0; i < tally->buckets-1; i++) {
- size_t adjust = (tally->counts[i] >> tally->step_bits) * spill;
- tally->counts[i] -= adjust;
- tally->counts[i+1] += adjust;
+ if (tally->step_bits < SIZET_BITS) {
+ spill = (tally->min - new_min) % ((size_t)1 << tally->step_bits);
+ for (i = 0; i < tally->buckets-1; i++) {
+ size_t adjust = (tally->counts[i] >> tally->step_bits) * spill;
+ tally->counts[i] -= adjust;
+ tally->counts[i+1] += adjust;
+ }
}
update:
{
int64_t q, uneg, vneg, diff, borrow;
- uneg = u1 >> 63; // -1 if u < 0.
- if (uneg) { // Compute the absolute
- u0 = -u0; // value of the dividend u.
+ uneg = u1 >> 63; /* -1 if u < 0. */
+ if (uneg) { /* Compute the absolute */
+ u0 = -u0; /* value of the dividend u. */
borrow = (u0 != 0);
u1 = -u1 - borrow;
}
- vneg = v >> 63; // -1 if v < 0.
- v = (v ^ vneg) - vneg; // Absolute value of v.
+ vneg = v >> 63; /* -1 if v < 0. */
+ v = (v ^ vneg) - vneg; /* Absolute value of v. */
- if ((uint64_t)u1 >= (uint64_t)v)
+ if ((uint64_t)u1 >= (uint64_t)v) {
goto overflow;
+ }
q = divlu64(u1, u0, v);
- diff = uneg ^ vneg; // Negate q if signs of
- q = (q ^ diff) - diff; // u and v differed.
+ diff = uneg ^ vneg; /* Negate q if signs of */
+ q = (q ^ diff) - diff; /* u and v differed. */
- if ((diff ^ q) < 0 && q != 0) { // If overflow, return the largest
- overflow: // possible neg. quotient.
+ if ((diff ^ q) < 0 && q != 0) { /* If overflow, return the
+ largest */
+ overflow: /* possible neg. quotient. */
q = 0x8000000000000000ULL;
}
return q;
ssize_t tally_mean(const struct tally *tally)
{
size_t count = tally_num(tally);
- if (!count)
+ if (!count) {
return 0;
+ }
if (sizeof(tally->total[0]) == sizeof(uint32_t)) {
/* Use standard 64-bit arithmetic. */
ssize_t min, max;
min = bucket_min(tally->min, tally->step_bits, b);
- if (b == tally->buckets - 1)
+ if (b == tally->buckets - 1) {
max = tally->max;
- else
+ } else {
max = bucket_min(tally->min, tally->step_bits, b+1) - 1;
+ }
/* FIXME: Think harder about cumulative error; is this enough?. */
*err = (max - min + 1) / 2;
for (i = 0; i < tally->buckets; i++) {
total += tally->counts[i];
- if (total * 2 >= count)
+ if (total * 2 >= count) {
break;
+ }
}
return bucket_range(tally, i, err);
}
{
unsigned int i;
- for (i = tally->buckets; i > 0; i--)
- if (tally->counts[i-1])
+ for (i = tally->buckets; i > 0; i--) {
+ if (tally->counts[i-1]) {
break;
+ }
+ }
return i;
}
/* We create a temporary then renormalize so < height. */
/* FIXME: Antialias properly! */
tmp = tally_new(tally->buckets);
- if (!tmp)
+ if (!tmp) {
return NULL;
+ }
tmp->min = tally->min;
tmp->max = tally->max;
tmp->step_bits = tally->step_bits;
memcpy(tmp->counts, tally->counts,
sizeof(tally->counts[0]) * tmp->buckets);
- while ((max_bucket = get_max_bucket(tmp)) >= height)
+ while ((max_bucket = get_max_bucket(tmp)) >= height) {
renormalize(tmp, tmp->min, tmp->max * 2);
+ }
/* Restore max */
tmp->max = tally->max;
tally = tmp;
/* Figure out longest line, for scale. */
largest_bucket = 0;
for (i = 0; i < tally->buckets; i++) {
- if (tally->counts[i] > largest_bucket)
+ if (tally->counts[i] > largest_bucket) {
largest_bucket = tally->counts[i];
+ }
}
p = graph = (char *)malloc(height * (width + 1) + 1);
row = height - i - 1;
count = (double)tally->counts[row] / largest_bucket * (width-1)+1;
- if (row == 0)
+ if (row == 0) {
covered = snprintf(p, width, "%zi", tally->min);
- else if (row == height - 1)
+ } else if (row == height - 1) {
covered = snprintf(p, width, "%zi", tally->max);
- else if (row == bucket_of(tally->min, tally->step_bits, 0))
+ } else if (row == bucket_of(tally->min, tally->step_bits, 0)) {
*p = '+';
- else
+ } else {
*p = '|';
+ }
- if (covered > width)
+ if (covered > width) {
covered = width;
+ }
p += covered;
- if (count > covered)
+ if (count > covered) {
count -= covered;
- else
+ memset(p, '*', count);
+ } else {
count = 0;
+ }
- memset(p, '*', count);
p += count;
*p = '\n';
p++;