提交 491d93bf 编写于 作者: B Behdad Esfahbod

Move more stuff from hb-private.hh to hb-dsalgs.hh

上级 f4777656
......@@ -28,6 +28,7 @@
#define HB_DEBUG_HH
#include "hb-private.hh"
#include "hb-dsalgs.hh"
#ifndef HB_DEBUG
......
......@@ -30,6 +30,243 @@
#include "hb-private.hh"
/* Void! For when we need a expression-type of void. */
typedef const struct _hb_void_t *hb_void_t;
#define HB_VOID ((const _hb_void_t *) nullptr)
/*
* Bithacks.
*/
/* Return the number of 1 bits in v. */
template <typename T>
static inline HB_CONST_FUNC unsigned int
hb_popcount (T v)
{
#if (__GNUC__ > 3 || (__GNUC__ == 3 && __GNUC_MINOR__ >= 4)) && defined(__OPTIMIZE__)
if (sizeof (T) <= sizeof (unsigned int))
return __builtin_popcount (v);
if (sizeof (T) <= sizeof (unsigned long))
return __builtin_popcountl (v);
if (sizeof (T) <= sizeof (unsigned long long))
return __builtin_popcountll (v);
#endif
if (sizeof (T) <= 4)
{
/* "HACKMEM 169" */
uint32_t y;
y = (v >> 1) &033333333333;
y = v - y - ((y >>1) & 033333333333);
return (((y + (y >> 3)) & 030707070707) % 077);
}
if (sizeof (T) == 8)
{
unsigned int shift = 32;
return hb_popcount<uint32_t> ((uint32_t) v) + hb_popcount ((uint32_t) (v >> shift));
}
if (sizeof (T) == 16)
{
unsigned int shift = 64;
return hb_popcount<uint64_t> ((uint64_t) v) + hb_popcount ((uint64_t) (v >> shift));
}
assert (0);
return 0; /* Shut up stupid compiler. */
}
/* Returns the number of bits needed to store number */
template <typename T>
static inline HB_CONST_FUNC unsigned int
hb_bit_storage (T v)
{
if (unlikely (!v)) return 0;
#if defined(__GNUC__) && (__GNUC__ >= 4) && defined(__OPTIMIZE__)
if (sizeof (T) <= sizeof (unsigned int))
return sizeof (unsigned int) * 8 - __builtin_clz (v);
if (sizeof (T) <= sizeof (unsigned long))
return sizeof (unsigned long) * 8 - __builtin_clzl (v);
if (sizeof (T) <= sizeof (unsigned long long))
return sizeof (unsigned long long) * 8 - __builtin_clzll (v);
#endif
#if (defined(_MSC_VER) && _MSC_VER >= 1500) || defined(__MINGW32__)
if (sizeof (T) <= sizeof (unsigned int))
{
unsigned long where;
_BitScanReverse (&where, v);
return 1 + where;
}
# if _WIN64
if (sizeof (T) <= 8)
{
unsigned long where;
_BitScanReverse64 (&where, v);
return 1 + where;
}
# endif
#endif
if (sizeof (T) <= 4)
{
/* "bithacks" */
const unsigned int b[] = {0x2, 0xC, 0xF0, 0xFF00, 0xFFFF0000};
const unsigned int S[] = {1, 2, 4, 8, 16};
unsigned int r = 0;
for (int i = 4; i >= 0; i--)
if (v & b[i])
{
v >>= S[i];
r |= S[i];
}
return r + 1;
}
if (sizeof (T) <= 8)
{
/* "bithacks" */
const uint64_t b[] = {0x2ULL, 0xCULL, 0xF0ULL, 0xFF00ULL, 0xFFFF0000ULL, 0xFFFFFFFF00000000ULL};
const unsigned int S[] = {1, 2, 4, 8, 16, 32};
unsigned int r = 0;
for (int i = 5; i >= 0; i--)
if (v & b[i])
{
v >>= S[i];
r |= S[i];
}
return r + 1;
}
if (sizeof (T) == 16)
{
unsigned int shift = 64;
return (v >> shift) ? hb_bit_storage<uint64_t> ((uint64_t) (v >> shift)) + shift :
hb_bit_storage<uint64_t> ((uint64_t) v);
}
assert (0);
return 0; /* Shut up stupid compiler. */
}
/* Returns the number of zero bits in the least significant side of v */
template <typename T>
static inline HB_CONST_FUNC unsigned int
hb_ctz (T v)
{
if (unlikely (!v)) return 0;
#if defined(__GNUC__) && (__GNUC__ >= 4) && defined(__OPTIMIZE__)
if (sizeof (T) <= sizeof (unsigned int))
return __builtin_ctz (v);
if (sizeof (T) <= sizeof (unsigned long))
return __builtin_ctzl (v);
if (sizeof (T) <= sizeof (unsigned long long))
return __builtin_ctzll (v);
#endif
#if (defined(_MSC_VER) && _MSC_VER >= 1500) || defined(__MINGW32__)
if (sizeof (T) <= sizeof (unsigned int))
{
unsigned long where;
_BitScanForward (&where, v);
return where;
}
# if _WIN64
if (sizeof (T) <= 8)
{
unsigned long where;
_BitScanForward64 (&where, v);
return where;
}
# endif
#endif
if (sizeof (T) <= 4)
{
/* "bithacks" */
unsigned int c = 32;
v &= - (int32_t) v;
if (v) c--;
if (v & 0x0000FFFF) c -= 16;
if (v & 0x00FF00FF) c -= 8;
if (v & 0x0F0F0F0F) c -= 4;
if (v & 0x33333333) c -= 2;
if (v & 0x55555555) c -= 1;
return c;
}
if (sizeof (T) <= 8)
{
/* "bithacks" */
unsigned int c = 64;
v &= - (int64_t) (v);
if (v) c--;
if (v & 0x00000000FFFFFFFFULL) c -= 32;
if (v & 0x0000FFFF0000FFFFULL) c -= 16;
if (v & 0x00FF00FF00FF00FFULL) c -= 8;
if (v & 0x0F0F0F0F0F0F0F0FULL) c -= 4;
if (v & 0x3333333333333333ULL) c -= 2;
if (v & 0x5555555555555555ULL) c -= 1;
return c;
}
if (sizeof (T) == 16)
{
unsigned int shift = 64;
return (uint64_t) v ? hb_bit_storage<uint64_t> ((uint64_t) v) :
hb_bit_storage<uint64_t> ((uint64_t) v >> shift) + shift;
}
assert (0);
return 0; /* Shut up stupid compiler. */
}
/*
* Tiny stuff.
*/
#undef MIN
template <typename Type>
static inline Type MIN (const Type &a, const Type &b) { return a < b ? a : b; }
#undef MAX
template <typename Type>
static inline Type MAX (const Type &a, const Type &b) { return a > b ? a : b; }
static inline unsigned int DIV_CEIL (const unsigned int a, unsigned int b)
{ return (a + (b - 1)) / b; }
#undef ARRAY_LENGTH
template <typename Type, unsigned int n>
static inline unsigned int ARRAY_LENGTH (const Type (&)[n]) { return n; }
/* A const version, but does not detect erratically being called on pointers. */
#define ARRAY_LENGTH_CONST(__array) ((signed int) (sizeof (__array) / sizeof (__array[0])))
static inline bool
hb_unsigned_mul_overflows (unsigned int count, unsigned int size)
{
return (size > 0) && (count >= ((unsigned int) -1) / size);
}
static inline unsigned int
hb_ceil_to_4 (unsigned int v)
{
return ((v - 1) | 3) + 1;
}
/*
* Sort and search.
*/
static inline void *
hb_bsearch_r (const void *key, const void *base,
size_t nmemb, size_t size,
......
......@@ -279,26 +279,6 @@ static int errno = 0; /* Use something better? */
# undef HB_USE_ATEXIT
#endif
/* Basics */
#undef MIN
template <typename Type>
static inline Type MIN (const Type &a, const Type &b) { return a < b ? a : b; }
#undef MAX
template <typename Type>
static inline Type MAX (const Type &a, const Type &b) { return a > b ? a : b; }
static inline unsigned int DIV_CEIL (const unsigned int a, unsigned int b)
{ return (a + (b - 1)) / b; }
#undef ARRAY_LENGTH
template <typename Type, unsigned int n>
static inline unsigned int ARRAY_LENGTH (const Type (&)[n]) { return n; }
/* A const version, but does not detect erratically being called on pointers. */
#define ARRAY_LENGTH_CONST(__array) ((signed int) (sizeof (__array) / sizeof (__array[0])))
#define HB_STMT_START do
#define HB_STMT_END while (0)
......@@ -350,228 +330,6 @@ static_assert ((sizeof (hb_var_int_t) == 4), "");
# define ASSERT_POD() _ASSERT_POD0 (__LINE__)
/* Tiny functions */
/*
* Void!
*/
typedef const struct _hb_void_t *hb_void_t;
#define HB_VOID ((const _hb_void_t *) nullptr)
/* Return the number of 1 bits in v. */
template <typename T>
static inline HB_CONST_FUNC unsigned int
hb_popcount (T v)
{
#if (__GNUC__ > 3 || (__GNUC__ == 3 && __GNUC_MINOR__ >= 4)) && defined(__OPTIMIZE__)
if (sizeof (T) <= sizeof (unsigned int))
return __builtin_popcount (v);
if (sizeof (T) <= sizeof (unsigned long))
return __builtin_popcountl (v);
if (sizeof (T) <= sizeof (unsigned long long))
return __builtin_popcountll (v);
#endif
if (sizeof (T) <= 4)
{
/* "HACKMEM 169" */
uint32_t y;
y = (v >> 1) &033333333333;
y = v - y - ((y >>1) & 033333333333);
return (((y + (y >> 3)) & 030707070707) % 077);
}
if (sizeof (T) == 8)
{
unsigned int shift = 32;
return hb_popcount<uint32_t> ((uint32_t) v) + hb_popcount ((uint32_t) (v >> shift));
}
if (sizeof (T) == 16)
{
unsigned int shift = 64;
return hb_popcount<uint64_t> ((uint64_t) v) + hb_popcount ((uint64_t) (v >> shift));
}
assert (0);
return 0; /* Shut up stupid compiler. */
}
/* Returns the number of bits needed to store number */
template <typename T>
static inline HB_CONST_FUNC unsigned int
hb_bit_storage (T v)
{
if (unlikely (!v)) return 0;
#if defined(__GNUC__) && (__GNUC__ >= 4) && defined(__OPTIMIZE__)
if (sizeof (T) <= sizeof (unsigned int))
return sizeof (unsigned int) * 8 - __builtin_clz (v);
if (sizeof (T) <= sizeof (unsigned long))
return sizeof (unsigned long) * 8 - __builtin_clzl (v);
if (sizeof (T) <= sizeof (unsigned long long))
return sizeof (unsigned long long) * 8 - __builtin_clzll (v);
#endif
#if (defined(_MSC_VER) && _MSC_VER >= 1500) || defined(__MINGW32__)
if (sizeof (T) <= sizeof (unsigned int))
{
unsigned long where;
_BitScanReverse (&where, v);
return 1 + where;
}
# if _WIN64
if (sizeof (T) <= 8)
{
unsigned long where;
_BitScanReverse64 (&where, v);
return 1 + where;
}
# endif
#endif
if (sizeof (T) <= 4)
{
/* "bithacks" */
const unsigned int b[] = {0x2, 0xC, 0xF0, 0xFF00, 0xFFFF0000};
const unsigned int S[] = {1, 2, 4, 8, 16};
unsigned int r = 0;
for (int i = 4; i >= 0; i--)
if (v & b[i])
{
v >>= S[i];
r |= S[i];
}
return r + 1;
}
if (sizeof (T) <= 8)
{
/* "bithacks" */
const uint64_t b[] = {0x2ULL, 0xCULL, 0xF0ULL, 0xFF00ULL, 0xFFFF0000ULL, 0xFFFFFFFF00000000ULL};
const unsigned int S[] = {1, 2, 4, 8, 16, 32};
unsigned int r = 0;
for (int i = 5; i >= 0; i--)
if (v & b[i])
{
v >>= S[i];
r |= S[i];
}
return r + 1;
}
if (sizeof (T) == 16)
{
unsigned int shift = 64;
return (v >> shift) ? hb_bit_storage<uint64_t> ((uint64_t) (v >> shift)) + shift :
hb_bit_storage<uint64_t> ((uint64_t) v);
}
assert (0);
return 0; /* Shut up stupid compiler. */
}
/* Returns the number of zero bits in the least significant side of v */
template <typename T>
static inline HB_CONST_FUNC unsigned int
hb_ctz (T v)
{
if (unlikely (!v)) return 0;
#if defined(__GNUC__) && (__GNUC__ >= 4) && defined(__OPTIMIZE__)
if (sizeof (T) <= sizeof (unsigned int))
return __builtin_ctz (v);
if (sizeof (T) <= sizeof (unsigned long))
return __builtin_ctzl (v);
if (sizeof (T) <= sizeof (unsigned long long))
return __builtin_ctzll (v);
#endif
#if (defined(_MSC_VER) && _MSC_VER >= 1500) || defined(__MINGW32__)
if (sizeof (T) <= sizeof (unsigned int))
{
unsigned long where;
_BitScanForward (&where, v);
return where;
}
# if _WIN64
if (sizeof (T) <= 8)
{
unsigned long where;
_BitScanForward64 (&where, v);
return where;
}
# endif
#endif
if (sizeof (T) <= 4)
{
/* "bithacks" */
unsigned int c = 32;
v &= - (int32_t) v;
if (v) c--;
if (v & 0x0000FFFF) c -= 16;
if (v & 0x00FF00FF) c -= 8;
if (v & 0x0F0F0F0F) c -= 4;
if (v & 0x33333333) c -= 2;
if (v & 0x55555555) c -= 1;
return c;
}
if (sizeof (T) <= 8)
{
/* "bithacks" */
unsigned int c = 64;
v &= - (int64_t) (v);
if (v) c--;
if (v & 0x00000000FFFFFFFFULL) c -= 32;
if (v & 0x0000FFFF0000FFFFULL) c -= 16;
if (v & 0x00FF00FF00FF00FFULL) c -= 8;
if (v & 0x0F0F0F0F0F0F0F0FULL) c -= 4;
if (v & 0x3333333333333333ULL) c -= 2;
if (v & 0x5555555555555555ULL) c -= 1;
return c;
}
if (sizeof (T) == 16)
{
unsigned int shift = 64;
return (uint64_t) v ? hb_bit_storage<uint64_t> ((uint64_t) v) :
hb_bit_storage<uint64_t> ((uint64_t) v >> shift) + shift;
}
assert (0);
return 0; /* Shut up stupid compiler. */
}
static inline bool
hb_unsigned_mul_overflows (unsigned int count, unsigned int size)
{
return (size > 0) && (count >= ((unsigned int) -1) / size);
}
static inline unsigned int
hb_ceil_to_4 (unsigned int v)
{
return ((v - 1) | 3) + 1;
}
static inline bool
hb_ispow2 (unsigned int v)
{
return 0 == (v & (v - 1));
}
/*
*
* Utility types
*
*/
#define HB_DISALLOW_COPY_AND_ASSIGN(TypeName) \
TypeName(const TypeName&); \
void operator=(const TypeName&)
......@@ -819,7 +577,7 @@ _hb_round (double x)
static inline int
_hb_memalign(void **memptr, size_t alignment, size_t size)
{
if (unlikely (!hb_ispow2 (alignment) ||
if (unlikely (0 != (alignment & (alignment - 1)) ||
!alignment ||
0 != (alignment & (sizeof (void *) - 1))))
return EINVAL;
......@@ -842,10 +600,10 @@ _hb_memalign(void **memptr, size_t alignment, size_t size)
/* Headers we include for everyone. Specifically ordered to resolve dependencies. */
#include "hb-debug.hh"
#include "hb-atomic-private.hh"
#include "hb-mutex-private.hh"
#include "hb-dsalgs.hh"
#include "hb-debug.hh"
#include "hb-object-private.hh"
#endif /* HB_PRIVATE_HH */
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