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Diffstat (limited to 'lib/ktl/include/limits')
| -rw-r--r-- | lib/ktl/include/limits | 110 |
1 files changed, 0 insertions, 110 deletions
diff --git a/lib/ktl/include/limits b/lib/ktl/include/limits deleted file mode 100644 index d8ea37d..0000000 --- a/lib/ktl/include/limits +++ /dev/null @@ -1,110 +0,0 @@ -// Copyright 2018 The Fuchsia Authors -// -// Use of this source code is governed by a MIT-style -// license that can be found in the LICENSE file or at -// https://opensource.org/licenses/MIT - -#pragma once - -// TODO(https://fxbug.dev/42106615): The libc++ <limits> defines specializations for -// floating-point types, which in GCC is incompatible with the command-line -// switches used for the kernel. So this header fakes out the other libc++ -// headers with a std::numeric_limits that is close enough. - -#include <limits.h> - -namespace std { - -template <class T> -class numeric_limits {}; - -#define SPECIALIZE_INT(type, sign, modulo, digits_, min_, max_) \ - template <> \ - class numeric_limits<type> { \ - public: \ - static constexpr bool is_specialized = true; \ - static constexpr bool is_signed = (sign); \ - static constexpr bool is_integer = true; \ - static constexpr bool is_exact = true; \ - static constexpr bool has_infinity = false; \ - static constexpr bool has_quiet_NaN = false; \ - static constexpr bool has_signaling_NaN = false; \ - static constexpr bool has_denorm = false; \ - static constexpr bool has_denorm_loss = false; \ - static constexpr bool round_style = false; \ - static constexpr bool is_iec559 = false; \ - static constexpr bool is_bounded = true; \ - static constexpr bool is_modulo = (modulo); \ - static constexpr int digits = (digits_); \ - static constexpr int digits10 = (digits_) * 3 / 10; \ - static constexpr int max_digits10 = 0; \ - static constexpr int radix = 2; \ - static constexpr int min_exponent = 0; \ - static constexpr int min_exponent10 = 0; \ - static constexpr int max_exponent = 0; \ - static constexpr int max_exponent10 = 0; \ - static constexpr bool traps = false; \ - static constexpr bool tinyness_before = false; \ - static constexpr type min() { \ - return (min_); \ - } \ - static constexpr type lowest() { \ - return (min_); \ - } \ - static constexpr type max() { \ - return (max_); \ - } \ - static constexpr type epsilon() { \ - return 0; \ - } \ - static constexpr type round_error() { \ - return 0; \ - } \ - static constexpr type infinity() { \ - return 0; \ - } \ - static constexpr type quiet_NaN() { \ - return 0; \ - } \ - static constexpr type signaling_NaN() { \ - return 0; \ - } \ - static constexpr type denorm_min() { \ - return 0; \ - } \ - } - -#define SPECIALIZE_SIGNED(type, min, max) \ - SPECIALIZE_INT(type, true, false, CHAR_BIT * sizeof(type) - 1, min, max) - -#define SPECIALIZE_UNSIGNED(type, min, max) \ - SPECIALIZE_INT(type, false, true, CHAR_BIT * sizeof(type), min, max) - -SPECIALIZE_INT(bool, false, true, 1, false, true); -#if CHAR_MIN == 0 -SPECIALIZE_UNSIGNED(char, CHAR_MIN, CHAR_MAX); -#else -SPECIALIZE_SIGNED(char, CHAR_MIN, CHAR_MAX); -#endif -SPECIALIZE_SIGNED(signed char, SCHAR_MIN, SCHAR_MAX); -SPECIALIZE_UNSIGNED(unsigned char, 0, UCHAR_MAX); - -SPECIALIZE_SIGNED(short, SHRT_MIN, SHRT_MAX); -SPECIALIZE_UNSIGNED(unsigned short, 0, USHRT_MAX); -SPECIALIZE_SIGNED(int, INT_MIN, INT_MAX); -SPECIALIZE_UNSIGNED(unsigned int, 0, UINT_MAX); -SPECIALIZE_SIGNED(long, LONG_MIN, LONG_MAX); -SPECIALIZE_UNSIGNED(unsigned long, 0, ULONG_MAX); -SPECIALIZE_SIGNED(long long, (-__LONG_LONG_MAX__ - 1LL), __LONG_LONG_MAX__); -SPECIALIZE_UNSIGNED(unsigned long long, 0, (__LONG_LONG_MAX__ * 2ULL + 1ULL)); - -#ifdef __SIZEOF_INT128__ -SPECIALIZE_SIGNED(__int128_t, (__int128_t{1} << 127), (~__uint128_t{0} ^ (__int128_t{1} << 127))); -SPECIALIZE_UNSIGNED(__uint128_t, 0, (~__uint128_t{0})); -#endif - -#undef SPECIALIZE_SIGNED -#undef SPECIALIZE_UNSIGNED -#undef SPECIALIZE_INT - -} // namespace std |