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Don't call memcpy when a table is empty

This commit is contained in:
Ebrahim Byagowi 2019-07-10 16:41:40 +04:30
parent c85f624b51
commit a6065d05cf
1 changed files with 4 additions and 3 deletions
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7
src/hb-open-file.hh
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@ -141,14 +141,15 @@ typedef struct OffsetTable
TableRecord &rec = tables.arrayZ[i];
hb_blob_t *blob = items[i].blob;
rec.tag = items[i].tag;
rec.length = hb_blob_get_length (blob);
rec.length = blob->length;
rec.offset.serialize (c, this);
/* Allocate room for the table and copy it. */
char *start = (char *) c->allocate_size<void> (rec.length);
if (unlikely (!start)) {return false;}
if (unlikely (!start)) return false;
memcpy (start, hb_blob_get_data (blob, nullptr), rec.length);
if (likely (rec.length))
memcpy (start, blob->data, rec.length);
/* 4-byte alignment. */
c->align (4);