diff options
Diffstat (limited to 'src/3rdparty/harfbuzz-ng/src/hb-serialize.hh')
| -rw-r--r-- | src/3rdparty/harfbuzz-ng/src/hb-serialize.hh | 108 |
1 files changed, 79 insertions, 29 deletions
diff --git a/src/3rdparty/harfbuzz-ng/src/hb-serialize.hh b/src/3rdparty/harfbuzz-ng/src/hb-serialize.hh index 40895a4548..61ec0253a0 100644 --- a/src/3rdparty/harfbuzz-ng/src/hb-serialize.hh +++ b/src/3rdparty/harfbuzz-ng/src/hb-serialize.hh @@ -74,23 +74,32 @@ struct hb_serialize_context_t } object_t () = default; - + #ifdef HB_EXPERIMENTAL_API object_t (const hb_object_t &o) { head = o.head; tail = o.tail; next = nullptr; - real_links.alloc (o.num_real_links); + real_links.alloc (o.num_real_links, true); for (unsigned i = 0 ; i < o.num_real_links; i++) real_links.push (o.real_links[i]); - virtual_links.alloc (o.num_virtual_links); + virtual_links.alloc (o.num_virtual_links, true); for (unsigned i = 0; i < o.num_virtual_links; i++) virtual_links.push (o.virtual_links[i]); } #endif + friend void swap (object_t& a, object_t& b) + { + hb_swap (a.head, b.head); + hb_swap (a.tail, b.tail); + hb_swap (a.next, b.next); + hb_swap (a.real_links, b.real_links); + hb_swap (a.virtual_links, b.virtual_links); + } + bool operator == (const object_t &o) const { // Virtual links aren't considered for equality since they don't affect the functionality @@ -111,10 +120,10 @@ struct hb_serialize_context_t struct link_t { unsigned width: 3; - bool is_signed: 1; + unsigned is_signed: 1; unsigned whence: 2; - unsigned position: 28; - unsigned bias; + unsigned bias : 26; + unsigned position; objidx_t objidx; link_t () = default; @@ -130,6 +139,14 @@ struct hb_serialize_context_t objidx = o.objidx; } #endif + + HB_INTERNAL static int cmp (const void* a, const void* b) + { + int cmp = ((const link_t*)a)->position - ((const link_t*)b)->position; + if (cmp) return cmp; + + return ((const link_t*)a)->objidx - ((const link_t*)b)->objidx; + } }; char *head; @@ -177,7 +194,6 @@ struct hb_serialize_context_t current = current->next; _->fini (); } - object_pool.fini (); } bool in_error () const { return bool (errors); } @@ -207,6 +223,7 @@ struct hb_serialize_context_t this->errors = HB_SERIALIZE_ERROR_NONE; this->head = this->start; this->tail = this->end; + this->zerocopy = nullptr; this->debug_depth = 0; fini (); @@ -306,10 +323,11 @@ struct hb_serialize_context_t { object_t *obj = current; if (unlikely (!obj)) return; - if (unlikely (in_error())) return; + if (unlikely (in_error() && !only_overflow ())) return; current = current->next; - revert (obj->head, obj->tail); + revert (zerocopy ? zerocopy : obj->head, obj->tail); + zerocopy = nullptr; obj->fini (); object_pool.release (obj); } @@ -327,8 +345,11 @@ struct hb_serialize_context_t current = current->next; obj->tail = head; obj->next = nullptr; + assert (obj->head <= obj->tail); unsigned len = obj->tail - obj->head; - head = obj->head; /* Rewind head. */ + head = zerocopy ? zerocopy : obj->head; /* Rewind head. */ + bool was_zerocopy = zerocopy; + zerocopy = nullptr; if (!len) { @@ -338,9 +359,11 @@ struct hb_serialize_context_t } objidx_t objidx; + uint32_t hash = 0; if (share) { - objidx = packed_map.get (obj); + hash = hb_hash (obj); + objidx = packed_map.get_with_hash (obj, hash); if (objidx) { merge_virtual_links (obj, objidx); @@ -350,7 +373,10 @@ struct hb_serialize_context_t } tail -= len; - memmove (tail, obj->head, len); + if (was_zerocopy) + assert (tail == obj->head); + else + memmove (tail, obj->head, len); obj->head = tail; obj->tail = tail + len; @@ -368,7 +394,7 @@ struct hb_serialize_context_t objidx = packed.length - 1; - if (share) packed_map.set (obj, objidx); + if (share) packed_map.set_with_hash (obj, hash, objidx); propagate_error (packed_map); return objidx; @@ -552,8 +578,26 @@ struct hb_serialize_context_t return !bool ((errors = (errors | err_type))); } + bool start_zerocopy (size_t size) + { + if (unlikely (in_error ())) return false; + + if (unlikely (size > INT_MAX || this->tail - this->head < ptrdiff_t (size))) + { + err (HB_SERIALIZE_ERROR_OUT_OF_ROOM); + return false; + } + + assert (!this->zerocopy); + this->zerocopy = this->head; + + assert (this->current->head == this->head); + this->current->head = this->current->tail = this->head = this->tail - size; + return true; + } + template <typename Type> - Type *allocate_size (size_t size) + Type *allocate_size (size_t size, bool clear = true) { if (unlikely (in_error ())) return nullptr; @@ -562,7 +606,8 @@ struct hb_serialize_context_t err (HB_SERIALIZE_ERROR_OUT_OF_ROOM); return nullptr; } - hb_memset (this->head, 0, size); + if (clear) + hb_memset (this->head, 0, size); char *ret = this->head; this->head += size; return reinterpret_cast<Type *> (ret); @@ -576,14 +621,21 @@ struct hb_serialize_context_t Type *embed (const Type *obj) { unsigned int size = obj->get_size (); - Type *ret = this->allocate_size<Type> (size); + Type *ret = this->allocate_size<Type> (size, false); if (unlikely (!ret)) return nullptr; - memcpy (ret, obj, size); + hb_memcpy (ret, obj, size); return ret; } template <typename Type> Type *embed (const Type &obj) { return embed (std::addressof (obj)); } + char *embed (const char *obj, unsigned size) + { + char *ret = this->allocate_size<char> (size, false); + if (unlikely (!ret)) return nullptr; + hb_memcpy (ret, obj, size); + return ret; + } template <typename Type, typename ...Ts> auto _copy (const Type &src, hb_priority<1>, Ts&&... ds) HB_RETURN @@ -599,7 +651,7 @@ struct hb_serialize_context_t } /* Like embed, but active: calls obj.operator=() or obj.copy() to transfer data - * instead of memcpy(). */ + * instead of hb_memcpy(). */ template <typename Type, typename ...Ts> Type *copy (const Type &src, Ts&&... ds) { return _copy (src, hb_prioritize, std::forward<Ts> (ds)...); } @@ -617,7 +669,7 @@ struct hb_serialize_context_t hb_serialize_context_t& operator << (const Type &obj) & { embed (obj); return *this; } template <typename Type> - Type *extend_size (Type *obj, size_t size) + Type *extend_size (Type *obj, size_t size, bool clear = true) { if (unlikely (in_error ())) return nullptr; @@ -625,12 +677,12 @@ struct hb_serialize_context_t assert ((char *) obj <= this->head); assert ((size_t) (this->head - (char *) obj) <= size); if (unlikely (((char *) obj + size < (char *) obj) || - !this->allocate_size<Type> (((char *) obj) + size - this->head))) return nullptr; + !this->allocate_size<Type> (((char *) obj) + size - this->head, clear))) return nullptr; return reinterpret_cast<Type *> (obj); } template <typename Type> - Type *extend_size (Type &obj, size_t size) - { return extend_size (std::addressof (obj), size); } + Type *extend_size (Type &obj, size_t size, bool clear = true) + { return extend_size (std::addressof (obj), size, clear); } template <typename Type> Type *extend_min (Type *obj) { return extend_size (obj, obj->min_size); } @@ -659,8 +711,8 @@ struct hb_serialize_context_t char *p = (char *) hb_malloc (len); if (unlikely (!p)) return hb_bytes_t (); - memcpy (p, this->start, this->head - this->start); - memcpy (p + (this->head - this->start), this->tail, this->end - this->tail); + hb_memcpy (p, this->start, this->head - this->start); + hb_memcpy (p + (this->head - this->start), this->tail, this->end - this->tail); return hb_bytes_t (p, len); } template <typename Type> @@ -686,8 +738,8 @@ struct hb_serialize_context_t check_assign (off, offset, HB_SERIALIZE_ERROR_OFFSET_OVERFLOW); } - public: /* TODO Make private. */ - char *start, *head, *tail, *end; + public: + char *start, *head, *tail, *end, *zerocopy; unsigned int debug_depth; hb_serialize_error_t errors; @@ -710,9 +762,7 @@ struct hb_serialize_context_t hb_vector_t<object_t *> packed; /* Map view of packed objects. */ - hb_hashmap_t<const object_t *, objidx_t, - const object_t *, objidx_t, - nullptr, 0> packed_map; + hb_hashmap_t<const object_t *, objidx_t> packed_map; }; #endif /* HB_SERIALIZE_HH */ |