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add a couple of NULL pointer checks for bucket-less histograms

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This commit is contained in:
Steffen Vogel 2016-10-30 22:55:12 -04:00
parent 693329cb68
commit c0d5bbb47b
1 changed files with 16 additions and 5 deletions
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21
lib/hist.c
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@ -24,15 +24,25 @@ void hist_create(struct hist *h, double low, double high, double resolution)
h->low = low;
h->high = high;
h->resolution = resolution;
h->length = (high - low) / resolution;
h->data = alloc(h->length * sizeof(unsigned));
if (resolution > 0) {
h->length = (high - low) / resolution;
h->data = alloc(h->length * sizeof(unsigned));
}
else {
h->length = 0;
h->data = NULL;
}
hist_reset(h);
}
void hist_destroy(struct hist *h)
{
free(h->data);
if (h->data) {
free(h->data);
h->data = NULL;
}
}
void hist_put(struct hist *h, double value)
@ -52,7 +62,7 @@ void hist_put(struct hist *h, double value)
h->higher++;
else if (idx < 0)
h->lower++;
else
else if (h->data != NULL)
h->data[idx]++;
h->total++;
@ -83,7 +93,8 @@ void hist_reset(struct hist *h)
h->highest = DBL_MIN;
h->lowest = DBL_MAX;
memset(h->data, 0, h->length * sizeof(unsigned));
if (h->data)
memset(h->data, 0, h->length * sizeof(unsigned));
}
double hist_mean(struct hist *h)