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[vector] Rewrite copy_array() to extend vector

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Behdad Esfahbod 2025-02-25 18:45:38 -07:00
parent 40c77a1c5a
commit aaf5c06d62
1 changed files with 12 additions and 18 deletions
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30
src/hb-vector.hh
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@ -333,13 +333,9 @@ struct hb_vector_t
void
copy_array (hb_array_t<const Type> other)
{
length = other.length;
if (!HB_OPTIMIZE_SIZE_VAL && sizeof (T) >= sizeof (long long))
/* This runs faster because of alignment. */
for (unsigned i = 0; i < length; i++)
arrayZ[i] = other.arrayZ[i];
else
hb_memcpy ((void *) arrayZ, (const void *) other.arrayZ, length * item_size);
assert ((int) (length + other.length) <= allocated);
hb_memcpy ((void *) (arrayZ + length), (const void *) other.arrayZ, other.length * item_size);
length += other.length;
}
template <typename T = Type,
hb_enable_if (!hb_is_trivially_copyable (T) &&
@ -347,12 +343,10 @@ struct hb_vector_t
void
copy_array (hb_array_t<const Type> other)
{
length = 0;
while (length < other.length)
{
length++;
new (std::addressof (arrayZ[length - 1])) Type (other.arrayZ[length - 1]);
}
assert ((int) (length + other.length) <= allocated);
for (unsigned i = 0; i < other.length; i++)
new (std::addressof (arrayZ[length + i])) Type (other.arrayZ[i]);
length += other.length;
}
template <typename T = Type,
hb_enable_if (!hb_is_trivially_copyable (T) &&
@ -362,13 +356,13 @@ struct hb_vector_t
void
copy_array (hb_array_t<const Type> other)
{
length = 0;
while (length < other.length)
assert ((int) (length + other.length) <= allocated);
for (unsigned i = 0; i < other.length; i++)
{
length++;
new (std::addressof (arrayZ[length - 1])) Type ();
arrayZ[length - 1] = other.arrayZ[length - 1];
new (std::addressof (arrayZ[length + i])) Type ();
arrayZ[length + i] = other.arrayZ[i];
}
length += other.length;
}
void