diff options
Diffstat (limited to 'thirdparty/harfbuzz/src/hb-algs.hh')
| -rw-r--r-- | thirdparty/harfbuzz/src/hb-algs.hh | 183 |
1 files changed, 170 insertions, 13 deletions
diff --git a/thirdparty/harfbuzz/src/hb-algs.hh b/thirdparty/harfbuzz/src/hb-algs.hh index 98de61f3e8..bc170b0546 100644 --- a/thirdparty/harfbuzz/src/hb-algs.hh +++ b/thirdparty/harfbuzz/src/hb-algs.hh @@ -35,6 +35,132 @@ #include "hb-number.hh" +/* + * Flags + */ + +/* Enable bitwise ops on enums marked as flags_t */ +/* To my surprise, looks like the function resolver is happy to silently cast + * one enum to another... So this doesn't provide the type-checking that I + * originally had in mind... :(. + * + * For MSVC warnings, see: https://github.com/harfbuzz/harfbuzz/pull/163 + */ +#ifdef _MSC_VER +# pragma warning(disable:4200) +# pragma warning(disable:4800) +#endif +#define HB_MARK_AS_FLAG_T(T) \ + extern "C++" { \ + static inline constexpr T operator | (T l, T r) { return T ((unsigned) l | (unsigned) r); } \ + static inline constexpr T operator & (T l, T r) { return T ((unsigned) l & (unsigned) r); } \ + static inline constexpr T operator ^ (T l, T r) { return T ((unsigned) l ^ (unsigned) r); } \ + static inline constexpr T operator ~ (T r) { return T (~(unsigned int) r); } \ + static inline T& operator |= (T &l, T r) { l = l | r; return l; } \ + static inline T& operator &= (T& l, T r) { l = l & r; return l; } \ + static inline T& operator ^= (T& l, T r) { l = l ^ r; return l; } \ + } \ + static_assert (true, "") + +/* Useful for set-operations on small enums. + * For example, for testing "x ∈ {x1, x2, x3}" use: + * (FLAG_UNSAFE(x) & (FLAG(x1) | FLAG(x2) | FLAG(x3))) + */ +#define FLAG(x) (static_assert_expr ((unsigned)(x) < 32) + (((uint32_t) 1U) << (unsigned)(x))) +#define FLAG_UNSAFE(x) ((unsigned)(x) < 32 ? (((uint32_t) 1U) << (unsigned)(x)) : 0) +#define FLAG_RANGE(x,y) (static_assert_expr ((x) < (y)) + FLAG(y+1) - FLAG(x)) +#define FLAG64(x) (static_assert_expr ((unsigned)(x) < 64) + (((uint64_t) 1ULL) << (unsigned)(x))) +#define FLAG64_UNSAFE(x) ((unsigned)(x) < 64 ? (((uint64_t) 1ULL) << (unsigned)(x)) : 0) + + +/* + * Big-endian integers. + */ + +/* Endian swap, used in Windows related backends */ +static inline constexpr uint16_t hb_uint16_swap (uint16_t v) +{ return (v >> 8) | (v << 8); } +static inline constexpr uint32_t hb_uint32_swap (uint32_t v) +{ return (hb_uint16_swap (v) << 16) | hb_uint16_swap (v >> 16); } + +template <typename Type, int Bytes = sizeof (Type)> +struct BEInt; +template <typename Type> +struct BEInt<Type, 1> +{ + public: + BEInt () = default; + constexpr BEInt (Type V) : v {uint8_t (V)} {} + constexpr operator Type () const { return v; } + private: uint8_t v; +}; +template <typename Type> +struct BEInt<Type, 2> +{ + public: + BEInt () = default; + constexpr BEInt (Type V) : v {uint8_t ((V >> 8) & 0xFF), + uint8_t ((V ) & 0xFF)} {} + + struct __attribute__((packed)) packed_uint16_t { uint16_t v; }; + constexpr operator Type () const + { +#if ((defined(__GNUC__) && __GNUC__ >= 5) || defined(__clang__)) && \ + defined(__BYTE_ORDER) && \ + (__BYTE_ORDER == __LITTLE_ENDIAN || __BYTE_ORDER == __BIG_ENDIAN) + /* Spoon-feed the compiler a big-endian integer with alignment 1. + * https://github.com/harfbuzz/harfbuzz/pull/1398 */ +#if __BYTE_ORDER == __LITTLE_ENDIAN + return __builtin_bswap16 (((packed_uint16_t *) this)->v); +#else /* __BYTE_ORDER == __BIG_ENDIAN */ + return ((packed_uint16_t *) this)->v; +#endif +#else + return (v[0] << 8) + + (v[1] ); +#endif + } + private: uint8_t v[2]; +}; +template <typename Type> +struct BEInt<Type, 3> +{ + static_assert (!hb_is_signed (Type), ""); + public: + BEInt () = default; + constexpr BEInt (Type V) : v {uint8_t ((V >> 16) & 0xFF), + uint8_t ((V >> 8) & 0xFF), + uint8_t ((V ) & 0xFF)} {} + + constexpr operator Type () const { return (v[0] << 16) + + (v[1] << 8) + + (v[2] ); } + private: uint8_t v[3]; +}; +template <typename Type> +struct BEInt<Type, 4> +{ + public: + BEInt () = default; + constexpr BEInt (Type V) : v {uint8_t ((V >> 24) & 0xFF), + uint8_t ((V >> 16) & 0xFF), + uint8_t ((V >> 8) & 0xFF), + uint8_t ((V ) & 0xFF)} {} + constexpr operator Type () const { return (v[0] << 24) + + (v[1] << 16) + + (v[2] << 8) + + (v[3] ); } + private: uint8_t v[4]; +}; + +/* Floats. */ + +/* We want our rounding towards +infinity. */ +static inline float +_hb_roundf (float x) { return floorf (x + .5f); } +#define roundf(x) _hb_roundf(x) + + /* Encodes three unsigned integers in one 64-bit number. If the inputs have more than 21 bits, * values will be truncated / overlap, and might not decode exactly. */ #define HB_CODEPOINT_ENCODE3(x,y,z) (((uint64_t) (x) << 42) | ((uint64_t) (y) << 21) | (uint64_t) (z)) @@ -48,6 +174,7 @@ #define HB_CODEPOINT_DECODE3_11_7_14_2(v) ((hb_codepoint_t) (((v) >> 14) & 0x007Fu) | 0x0300) #define HB_CODEPOINT_DECODE3_11_7_14_3(v) ((hb_codepoint_t) (v) & 0x3FFFu) + struct { /* Note. This is dangerous in that if it's passed an rvalue, it returns rvalue-reference. */ @@ -215,7 +342,9 @@ struct template <typename Pred, typename Val> auto impl (Pred&& p, Val &&v, hb_priority<1>) const HB_AUTO_RETURN - (hb_deref (hb_forward<Pred> (p)).has (hb_forward<Val> (v))) + ( + hb_deref (hb_forward<Pred> (p)).has (hb_forward<Val> (v)) + ) template <typename Pred, typename Val> auto impl (Pred&& p, Val &&v, hb_priority<0>) const HB_AUTO_RETURN @@ -269,7 +398,9 @@ struct template <typename Proj, typename Val> auto impl (Proj&& f, Val &&v, hb_priority<2>) const HB_AUTO_RETURN - (hb_deref (hb_forward<Proj> (f)).get (hb_forward<Val> (v))) + ( + hb_deref (hb_forward<Proj> (f)).get (hb_forward<Val> (v)) + ) template <typename Proj, typename Val> auto impl (Proj&& f, Val &&v, hb_priority<1>) const HB_AUTO_RETURN @@ -296,6 +427,40 @@ struct } HB_FUNCOBJ (hb_get); +struct +{ + private: + + template <typename T1, typename T2> auto + impl (T1&& v1, T2 &&v2, hb_priority<2>) const HB_AUTO_RETURN + ( + hb_forward<T2> (v2).cmp (hb_forward<T1> (v1)) == 0 + ) + + template <typename T1, typename T2> auto + impl (T1&& v1, T2 &&v2, hb_priority<1>) const HB_AUTO_RETURN + ( + hb_forward<T1> (v1).cmp (hb_forward<T2> (v2)) == 0 + ) + + template <typename T1, typename T2> auto + impl (T1&& v1, T2 &&v2, hb_priority<0>) const HB_AUTO_RETURN + ( + hb_forward<T1> (v1) == hb_forward<T2> (v2) + ) + + public: + + template <typename T1, typename T2> auto + operator () (T1&& v1, T2 &&v2) const HB_AUTO_RETURN + ( + impl (hb_forward<T1> (v1), + hb_forward<T2> (v2), + hb_prioritize) + ) +} +HB_FUNCOBJ (hb_equal); + template <typename T1, typename T2> struct hb_pair_t @@ -375,7 +540,7 @@ HB_FUNCOBJ (hb_clamp); /* Return the number of 1 bits in v. */ template <typename T> -static inline HB_CONST_FUNC unsigned int +static inline unsigned int hb_popcount (T v) { #if (defined(__GNUC__) && (__GNUC__ >= 4)) || defined(__clang__) @@ -416,7 +581,7 @@ hb_popcount (T v) /* Returns the number of bits needed to store number */ template <typename T> -static inline HB_CONST_FUNC unsigned int +static inline unsigned int hb_bit_storage (T v) { if (unlikely (!v)) return 0; @@ -490,7 +655,7 @@ hb_bit_storage (T v) /* Returns the number of zero bits in the least significant side of v */ template <typename T> -static inline HB_CONST_FUNC unsigned int +static inline unsigned int hb_ctz (T v) { if (unlikely (!v)) return 8 * sizeof (T); @@ -988,32 +1153,24 @@ hb_codepoint_parse (const char *s, unsigned int len, int base, hb_codepoint_t *o struct hb_bitwise_and { HB_PARTIALIZE(2); - static constexpr bool passthru_left = false; - static constexpr bool passthru_right = false; template <typename T> constexpr auto operator () (const T &a, const T &b) const HB_AUTO_RETURN (a & b) } HB_FUNCOBJ (hb_bitwise_and); struct hb_bitwise_or { HB_PARTIALIZE(2); - static constexpr bool passthru_left = true; - static constexpr bool passthru_right = true; template <typename T> constexpr auto operator () (const T &a, const T &b) const HB_AUTO_RETURN (a | b) } HB_FUNCOBJ (hb_bitwise_or); struct hb_bitwise_xor { HB_PARTIALIZE(2); - static constexpr bool passthru_left = true; - static constexpr bool passthru_right = true; template <typename T> constexpr auto operator () (const T &a, const T &b) const HB_AUTO_RETURN (a ^ b) } HB_FUNCOBJ (hb_bitwise_xor); struct hb_bitwise_sub { HB_PARTIALIZE(2); - static constexpr bool passthru_left = true; - static constexpr bool passthru_right = false; template <typename T> constexpr auto operator () (const T &a, const T &b) const HB_AUTO_RETURN (a & ~b) } |