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[array] Organize

This commit is contained in:
Behdad Esfahbod 2018-12-16 23:57:27 -05:00
parent 84c1865821
commit a4354d2fd3
1 changed files with 49 additions and 28 deletions
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77
src/hb-array.hh
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@ -39,11 +39,18 @@ struct hb_array_t
typedef Type ItemType; typedef Type ItemType;
enum { item_size = hb_static_size (Type) }; enum { item_size = hb_static_size (Type) };
/*
* Constructors.
*/
hb_array_t (void) : arrayZ (nullptr), len (0) {} hb_array_t (void) : arrayZ (nullptr), len (0) {}
hb_array_t (const hb_array_t &o) : arrayZ (o.arrayZ), len (o.len) {} hb_array_t (const hb_array_t &o) : arrayZ (o.arrayZ), len (o.len) {}
hb_array_t (hb_array_t<const Type> o) : arrayZ (o.arrayZ), len (o.len) {} hb_array_t (hb_array_t<const Type> o) : arrayZ (o.arrayZ), len (o.len) {}
hb_array_t (Type *array_, unsigned int len_) : arrayZ (array_), len (len_) {} hb_array_t (Type *array_, unsigned int len_) : arrayZ (array_), len (len_) {}
/*
* Operators.
*/
Type& operator [] (int i_) const Type& operator [] (int i_) const
{ {
unsigned int i = (unsigned int) i_; unsigned int i = (unsigned int) i_;
@ -66,24 +73,23 @@ struct hb_array_t
return *this; return *this;
} }
unsigned int get_size (void) const { return len * item_size; } /*
* Compare, Sort, and Search.
*/
hb_array_t<Type> sub_array (unsigned int start_offset = 0, unsigned int *seg_count = nullptr /* IN/OUT */) const /* Note: our compare is NOT lexicographic; it also does NOT call Type::cmp. */
int cmp (const hb_array_t<Type> &a) const
{ {
if (!start_offset && !seg_count) if (len != a.len)
return *this; return (int) a.len - (int) len;
return hb_memcmp (a.arrayZ, arrayZ, get_size ());
unsigned int count = len; }
if (unlikely (start_offset > count)) static int cmp (const void *pa, const void *pb)
count = 0; {
else hb_array_t<Type> *a = (hb_array_t<Type> *) pa;
count -= start_offset; hb_array_t<Type> *b = (hb_array_t<Type> *) pb;
if (seg_count) return b->cmp (*a);
count = *seg_count = MIN (count, *seg_count);
return hb_array_t<Type> (arrayZ + start_offset, count);
} }
hb_array_t<Type> sub_array (unsigned int start_offset, unsigned int seg_count) const
{ return sub_array (start_offset, &seg_count); }
template <typename T> template <typename T>
Type *lsearch (const T &x, Type *not_found = nullptr) Type *lsearch (const T &x, Type *not_found = nullptr)
@ -121,26 +127,41 @@ struct hb_array_t
::qsort (arrayZ + start, end - start, item_size, Type::cmp); ::qsort (arrayZ + start, end - start, item_size, Type::cmp);
} }
/*
* Other methods.
*/
unsigned int get_size (void) const { return len * item_size; }
hb_array_t<Type> sub_array (unsigned int start_offset = 0, unsigned int *seg_count = nullptr /* IN/OUT */) const
{
if (!start_offset && !seg_count)
return *this;
unsigned int count = len;
if (unlikely (start_offset > count))
count = 0;
else
count -= start_offset;
if (seg_count)
count = *seg_count = MIN (count, *seg_count);
return hb_array_t<Type> (arrayZ + start_offset, count);
}
hb_array_t<Type> sub_array (unsigned int start_offset, unsigned int seg_count) const
{ return sub_array (start_offset, &seg_count); }
/* Only call if you allocated the underlying array using malloc() or similar. */
void free (void) void free (void)
{ ::free ((void *) arrayZ); arrayZ = nullptr; len = 0; } { ::free ((void *) arrayZ); arrayZ = nullptr; len = 0; }
int cmp (const hb_array_t<Type> &a) const
{
if (len != a.len)
return (int) a.len - (int) len;
return hb_memcmp (a.arrayZ, arrayZ, get_size ());
}
static int cmp (const void *pa, const void *pb)
{
hb_array_t<Type> *a = (hb_array_t<Type> *) pa;
hb_array_t<Type> *b = (hb_array_t<Type> *) pb;
return b->cmp (*a);
}
template <typename hb_sanitize_context_t> template <typename hb_sanitize_context_t>
bool sanitize (hb_sanitize_context_t *c) const bool sanitize (hb_sanitize_context_t *c) const
{ return c->check_array (arrayZ, len); } { return c->check_array (arrayZ, len); }
/*
* Members
*/
public: public:
Type *arrayZ; Type *arrayZ;
unsigned int len; unsigned int len;