src/cpp-common/bt2c/std-int.hpp

   1 /*
   2  * Copyright (c) 2022 Philippe Proulx <pproulx@efficios.com>
   3  *
   4  * SPDX-License-Identifier: MIT
   5  */
   6
   7 #ifndef BABELTRACE_CPP_COMMON_BT2C_STD_INT_HPP
   8 #define BABELTRACE_CPP_COMMON_BT2C_STD_INT_HPP
   9
  10 #include <cstdint>
  11
  12 namespace bt2c {
  13 namespace internal {
  14
  15 template <std::size_t LenBitsV, bool IsSignedV>
  16 struct StdIntTBase;
  17
  18 template <>
  19 struct StdIntTBase<8, true>
  20 {
  21     using Type = std::int8_t;
  22 };
  23
  24 template <>
  25 struct StdIntTBase<8, false>
  26 {
  27     using Type = std::uint8_t;
  28 };
  29
  30 template <>
  31 struct StdIntTBase<16, true>
  32 {
  33     using Type = std::int16_t;
  34 };
  35
  36 template <>
  37 struct StdIntTBase<16, false>
  38 {
  39     using Type = std::uint16_t;
  40 };
  41
  42 template <>
  43 struct StdIntTBase<32, true>
  44 {
  45     using Type = std::int32_t;
  46 };
  47
  48 template <>
  49 struct StdIntTBase<32, false>
  50 {
  51     using Type = std::uint32_t;
  52 };
  53
  54 template <>
  55 struct StdIntTBase<64, true>
  56 {
  57     using Type = std::int64_t;
  58 };
  59
  60 template <>
  61 struct StdIntTBase<64, false>
  62 {
  63     using Type = std::uint64_t;
  64 };
  65
  66 } /* namespace internal */
  67
  68 /*
  69  * Standard fixed-length integer type `Type` of length `LenBitsV` bits
  70  * and signedness `IsSignedV`.
  71  *
  72  * `LenBitsV` must be one of 8, 16, 32, or 64.
  73  *
  74  * For example, `StdIntT<32, true>` is `std::int32_t`.
  75  */
  76 template <std::size_t LenBitsV, bool IsSignedV>
  77 using StdIntT = typename internal::StdIntTBase<LenBitsV, IsSignedV>::Type;
  78
  79 } /* namespace bt2c */
  80
  81 #endif /* BABELTRACE_CPP_COMMON_BT2C_STD_INT_HPP */