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Improve allocation logic

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hasufell 2014-05-15 19:04:51 +02:00
parent 242af84c99
commit 23dbcf2c58
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GPG Key ID: 220CD1C5BDEED020
1 changed files with 5 additions and 14 deletions
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src/half_edge.c
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@ -72,33 +72,24 @@ static bool get_all_emanating_edges(HE_vert const * const vert,
HE_edge ***edge_array_out, HE_edge ***edge_array_out,
uint32_t *ec_out) uint32_t *ec_out)
{ {
uint32_t ec = 0, /* edge count */ uint32_t ec = 0; /* edge count */
rc = 0; /* realloc count */ HE_edge **edge_array = NULL;
uint32_t const approx_ec = 20; /* allocation chunk */
HE_edge **edge_array;
if (!edge_array_out || !vert || !ec_out) if (!edge_array_out || !vert || !ec_out)
return false; return false;
edge_array = malloc(sizeof(HE_edge*) * approx_ec);
CHECK_PTR_VAL(edge_array);
HE_edge *edge = vert->edge; HE_edge *edge = vert->edge;
/* build an array of emanating edges */ /* build an array of emanating edges */
do { do {
REALLOC(edge_array,
sizeof(HE_edge*) * (ec + 1));
edge_array[ec] = edge; edge_array[ec] = edge;
edge = edge->pair->next; edge = edge->pair->next;
ec++; ec++;
/* allocate more chunks */
if (ec >= approx_ec) {
REALLOC(edge_array, sizeof(HE_edge*)
* approx_ec * (rc + 2));
rc++;
}
} while (edge && edge != vert->edge); } while (edge && edge != vert->edge);
/* set out-pointers */ /* set out-pointers */