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[vector] Speed up hb_vector_t<hb_vector_t<U>>::realloc_vector

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Use in CFF subsetting.
This commit is contained in:
Behdad Esfahbod 2023-06-23 14:42:21 -06:00
parent b96eed0294
commit d36b87bde4
1 changed files with 16 additions and 3 deletions
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19
src/hb-vector.hh
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@ -255,7 +255,7 @@ struct hb_vector_t
template <typename T = Type,
hb_enable_if (hb_is_trivially_copy_assignable(T))>
Type *
realloc_vector (unsigned new_allocated)
realloc_vector (unsigned new_allocated, hb_priority<0>)
{
if (!new_allocated)
{
@ -267,7 +267,7 @@ struct hb_vector_t
template <typename T = Type,
hb_enable_if (!hb_is_trivially_copy_assignable(T))>
Type *
realloc_vector (unsigned new_allocated)
realloc_vector (unsigned new_allocated, hb_priority<0>)
{
if (!new_allocated)
{
@ -287,6 +287,19 @@ struct hb_vector_t
}
return new_array;
}
/* Specialization for hb_vector_t<hb_vector_t<U>> to speed up. */
template <typename T = Type,
hb_enable_if (hb_is_same(T, hb_vector_t<typename T::item_t>))>
Type *
realloc_vector (unsigned new_allocated, hb_priority<1>)
{
if (!new_allocated)
{
hb_free (arrayZ);
return nullptr;
}
return (Type *) hb_realloc (arrayZ, new_allocated * sizeof (Type));
}
template <typename T = Type,
hb_enable_if (hb_is_trivially_constructible(T))>
@ -418,7 +431,7 @@ struct hb_vector_t
return false;
}
Type *new_array = realloc_vector (new_allocated);
Type *new_array = realloc_vector (new_allocated, hb_prioritize);
if (unlikely (new_allocated && !new_array))
{