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[Complex Text Layouts] Add third-party TextServer dependencies (ICU, HarfBuzz, Graphite).
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bruvzg
313
thirdparty/harfbuzz/src/hb-vector.hh
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313
thirdparty/harfbuzz/src/hb-vector.hh
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/*
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* Copyright © 2017,2018 Google, Inc.
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*
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* This is part of HarfBuzz, a text shaping library.
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*
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* Permission is hereby granted, without written agreement and without
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* license or royalty fees, to use, copy, modify, and distribute this
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* software and its documentation for any purpose, provided that the
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* above copyright notice and the following two paragraphs appear in
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* all copies of this software.
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*
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* IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR
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* DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
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* ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN
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* IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
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* DAMAGE.
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*
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* THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING,
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* BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
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* FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS
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* ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO
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* PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
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*
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* Google Author(s): Behdad Esfahbod
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*/
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#ifndef HB_VECTOR_HH
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#define HB_VECTOR_HH
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#include "hb.hh"
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#include "hb-array.hh"
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#include "hb-null.hh"
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template <typename Type>
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struct hb_vector_t
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{
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typedef Type item_t;
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static constexpr unsigned item_size = hb_static_size (Type);
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hb_vector_t () { init (); }
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hb_vector_t (const hb_vector_t &o)
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{
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init ();
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alloc (o.length);
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hb_copy (o, *this);
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}
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hb_vector_t (hb_vector_t &&o)
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{
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allocated = o.allocated;
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length = o.length;
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arrayZ = o.arrayZ;
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o.init ();
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}
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~hb_vector_t () { fini (); }
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private:
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int allocated; /* == -1 means allocation failed. */
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public:
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unsigned int length;
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public:
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Type *arrayZ;
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void init ()
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{
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allocated = length = 0;
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arrayZ = nullptr;
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}
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void fini ()
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{
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free (arrayZ);
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init ();
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}
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void fini_deep ()
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{
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unsigned int count = length;
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for (unsigned int i = 0; i < count; i++)
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arrayZ[i].fini ();
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fini ();
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}
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void reset () { resize (0); }
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hb_vector_t& operator = (const hb_vector_t &o)
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{
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reset ();
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alloc (o.length);
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hb_copy (o, *this);
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return *this;
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}
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hb_vector_t& operator = (hb_vector_t &&o)
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{
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fini ();
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allocated = o.allocated;
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length = o.length;
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arrayZ = o.arrayZ;
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o.init ();
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return *this;
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}
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hb_bytes_t as_bytes () const
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{ return hb_bytes_t ((const char *) arrayZ, length * item_size); }
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bool operator == (const hb_vector_t &o) const { return as_array () == o.as_array (); }
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bool operator != (const hb_vector_t &o) const { return !(*this == o); }
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uint32_t hash () const { return as_array ().hash (); }
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Type& operator [] (int i_)
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{
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unsigned int i = (unsigned int) i_;
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if (unlikely (i >= length))
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return Crap (Type);
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return arrayZ[i];
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}
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const Type& operator [] (int i_) const
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{
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unsigned int i = (unsigned int) i_;
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if (unlikely (i >= length))
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return Null (Type);
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return arrayZ[i];
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}
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Type& tail () { return (*this)[length - 1]; }
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const Type& tail () const { return (*this)[length - 1]; }
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explicit operator bool () const { return length; }
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unsigned get_size () const { return length * item_size; }
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/* Sink interface. */
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template <typename T>
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hb_vector_t& operator << (T&& v) { push (hb_forward<T> (v)); return *this; }
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hb_array_t< Type> as_array () { return hb_array (arrayZ, length); }
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hb_array_t<const Type> as_array () const { return hb_array (arrayZ, length); }
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/* Iterator. */
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typedef hb_array_t<const Type> iter_t;
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typedef hb_array_t< Type> writer_t;
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iter_t iter () const { return as_array (); }
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writer_t writer () { return as_array (); }
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operator iter_t () const { return iter (); }
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operator writer_t () { return writer (); }
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hb_array_t<const Type> sub_array (unsigned int start_offset, unsigned int count) const
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{ return as_array ().sub_array (start_offset, count); }
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hb_array_t<const Type> sub_array (unsigned int start_offset, unsigned int *count = nullptr /* IN/OUT */) const
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{ return as_array ().sub_array (start_offset, count); }
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hb_array_t<Type> sub_array (unsigned int start_offset, unsigned int count)
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{ return as_array ().sub_array (start_offset, count); }
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hb_array_t<Type> sub_array (unsigned int start_offset, unsigned int *count = nullptr /* IN/OUT */)
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{ return as_array ().sub_array (start_offset, count); }
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hb_sorted_array_t<Type> as_sorted_array ()
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{ return hb_sorted_array (arrayZ, length); }
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hb_sorted_array_t<const Type> as_sorted_array () const
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{ return hb_sorted_array (arrayZ, length); }
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template <typename T> explicit operator T * () { return arrayZ; }
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template <typename T> explicit operator const T * () const { return arrayZ; }
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Type * operator + (unsigned int i) { return arrayZ + i; }
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const Type * operator + (unsigned int i) const { return arrayZ + i; }
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Type *push ()
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{
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if (unlikely (!resize (length + 1)))
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return &Crap (Type);
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return &arrayZ[length - 1];
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}
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template <typename T>
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Type *push (T&& v)
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{
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Type *p = push ();
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*p = hb_forward<T> (v);
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return p;
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}
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bool in_error () const { return allocated < 0; }
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/* Allocate for size but don't adjust length. */
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bool alloc (unsigned int size)
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{
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if (unlikely (allocated < 0))
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return false;
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if (likely (size <= (unsigned) allocated))
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return true;
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/* Reallocate */
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unsigned int new_allocated = allocated;
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while (size >= new_allocated)
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new_allocated += (new_allocated >> 1) + 8;
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Type *new_array = nullptr;
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bool overflows =
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(int) new_allocated < 0 ||
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(new_allocated < (unsigned) allocated) ||
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hb_unsigned_mul_overflows (new_allocated, sizeof (Type));
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if (likely (!overflows))
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new_array = (Type *) realloc (arrayZ, new_allocated * sizeof (Type));
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if (unlikely (!new_array))
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{
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allocated = -1;
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return false;
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}
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arrayZ = new_array;
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allocated = new_allocated;
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return true;
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}
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bool resize (int size_)
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{
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unsigned int size = size_ < 0 ? 0u : (unsigned int) size_;
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if (!alloc (size))
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return false;
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if (size > length)
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memset (arrayZ + length, 0, (size - length) * sizeof (*arrayZ));
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length = size;
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return true;
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}
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Type pop ()
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{
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if (!length) return Null (Type);
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return hb_move (arrayZ[--length]); /* Does this move actually work? */
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}
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void remove (unsigned int i)
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{
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if (unlikely (i >= length))
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return;
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memmove (static_cast<void *> (&arrayZ[i]),
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static_cast<void *> (&arrayZ[i + 1]),
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(length - i - 1) * sizeof (Type));
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length--;
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}
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void shrink (int size_)
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{
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unsigned int size = size_ < 0 ? 0u : (unsigned int) size_;
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if (size < length)
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length = size;
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}
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template <typename T>
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Type *find (T v)
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{
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for (unsigned int i = 0; i < length; i++)
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if (arrayZ[i] == v)
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return &arrayZ[i];
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return nullptr;
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}
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template <typename T>
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const Type *find (T v) const
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{
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for (unsigned int i = 0; i < length; i++)
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if (arrayZ[i] == v)
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return &arrayZ[i];
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return nullptr;
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}
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void qsort (int (*cmp)(const void*, const void*))
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{ as_array ().qsort (cmp); }
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void qsort (unsigned int start = 0, unsigned int end = (unsigned int) -1)
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{ as_array ().qsort (start, end); }
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template <typename T>
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Type *lsearch (const T &x, Type *not_found = nullptr)
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{ return as_array ().lsearch (x, not_found); }
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template <typename T>
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const Type *lsearch (const T &x, const Type *not_found = nullptr) const
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{ return as_array ().lsearch (x, not_found); }
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template <typename T>
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bool lfind (const T &x, unsigned *pos = nullptr) const
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{ return as_array ().lfind (x, pos); }
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};
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template <typename Type>
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struct hb_sorted_vector_t : hb_vector_t<Type>
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{
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hb_sorted_array_t< Type> as_array () { return hb_sorted_array (this->arrayZ, this->length); }
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hb_sorted_array_t<const Type> as_array () const { return hb_sorted_array (this->arrayZ, this->length); }
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/* Iterator. */
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typedef hb_sorted_array_t<const Type> const_iter_t;
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typedef hb_sorted_array_t< Type> iter_t;
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const_iter_t iter () const { return as_array (); }
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const_iter_t citer () const { return as_array (); }
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iter_t iter () { return as_array (); }
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operator iter_t () { return iter (); }
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operator const_iter_t () const { return iter (); }
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template <typename T>
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Type *bsearch (const T &x, Type *not_found = nullptr)
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{ return as_array ().bsearch (x, not_found); }
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template <typename T>
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const Type *bsearch (const T &x, const Type *not_found = nullptr) const
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{ return as_array ().bsearch (x, not_found); }
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template <typename T>
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bool bfind (const T &x, unsigned int *i = nullptr,
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hb_bfind_not_found_t not_found = HB_BFIND_NOT_FOUND_DONT_STORE,
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unsigned int to_store = (unsigned int) -1) const
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{ return as_array ().bfind (x, i, not_found, to_store); }
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};
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#endif /* HB_VECTOR_HH */
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