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Update me->tail with a single assignment operation. #4

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Update me->tail with a single assignment operation. #4

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7 changes: 4 additions & 3 deletions cbuffer.c
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Original file line number Diff line number Diff line change
Expand Up @@ -88,9 +88,10 @@ int cbuf_offer(cbuf_t *me, const unsigned char *data, const int size)
int written = cbuf_unusedspace(me);
written = size < written ? size : written;
memcpy(me->data + me->tail, data, written);
me->tail += written;
if (me->size < me->tail)
me->tail %= me->size;
unsigned int new_tail = me->tail + written;
if (me->size < new_tail)
new_tail %= me->size;
me->tail = new_tail;
return written;
}

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