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Change hb_assert_unsigned_t<> to hb_is_signed<>

This commit is contained in:
Behdad Esfahbod 2018-12-01 13:03:52 -05:00
parent c3a8b047aa
commit 50e0273ab1
1 changed files with 10 additions and 6 deletions
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16
src/hb-dsalgs.hh
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@ -287,11 +287,15 @@ hb_ceil_to_4 (unsigned int v)
return ((v - 1) | 3) + 1; return ((v - 1) | 3) + 1;
} }
template <typename T> class hb_assert_unsigned_t; template <typename T> struct hb_is_signed;
template <> class hb_assert_unsigned_t<unsigned char> {}; template <> struct hb_is_signed<signed char> { enum { value = true }; };
template <> class hb_assert_unsigned_t<unsigned short> {}; template <> struct hb_is_signed<signed short> { enum { value = true }; };
template <> class hb_assert_unsigned_t<unsigned int> {}; template <> struct hb_is_signed<signed int> { enum { value = true }; };
template <> class hb_assert_unsigned_t<unsigned long> {}; template <> struct hb_is_signed<signed long> { enum { value = true }; };
template <> struct hb_is_signed<unsigned char> { enum { value = false }; };
template <> struct hb_is_signed<unsigned short> { enum { value = false }; };
template <> struct hb_is_signed<unsigned int> { enum { value = false }; };
template <> struct hb_is_signed<unsigned long> { enum { value = false }; };
template <typename T> static inline bool template <typename T> static inline bool
hb_in_range (T u, T lo, T hi) hb_in_range (T u, T lo, T hi)
@ -301,7 +305,7 @@ hb_in_range (T u, T lo, T hi)
* one right now. Declaring a variable won't work as HB_UNUSED * one right now. Declaring a variable won't work as HB_UNUSED
* is unusable on some platforms and unused types are less likely * is unusable on some platforms and unused types are less likely
* to generate a warning than unused variables. */ * to generate a warning than unused variables. */
static_assert ((sizeof (hb_assert_unsigned_t<T>) >= 0), ""); static_assert (!hb_is_signed<T>::value, "");
/* The casts below are important as if T is smaller than int, /* The casts below are important as if T is smaller than int,
* the subtract results will become a signed int! */ * the subtract results will become a signed int! */