mirror of
https://github.com/wheremyfoodat/Panda3DS.git
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Add std::bit_cast fallback for Helpers::bit_cast and run clang-format
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wheremyfoodat
GitHub
parent
e9b3b7c2a2
commit
88e3eb1558
1 changed files with 119 additions and 121 deletions
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@ -1,6 +1,6 @@
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#pragma once
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#include <cstdarg>
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#include <climits>
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#include <cstdarg>
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#include <cstdint>
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#include <fstream>
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#include <iostream>
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@ -8,8 +8,16 @@
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#include <type_traits>
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#include <utility>
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#include <vector>
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#include "termcolor.hpp"
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// We have to detect and special-case AppleClang at the moment since its C++20 support is finicky and doesn't quite support std::bit_cast
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#if defined(__clang__) && defined(__apple_build_version__)
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#define HELPERS_APPLE_CLANG
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#else
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#include <bit>
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#endif
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using u8 = std::uint8_t;
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using u16 = std::uint16_t;
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using u32 = std::uint32_t;
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@ -23,78 +31,74 @@ using s32 = std::int32_t;
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using s64 = std::int64_t;
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namespace Helpers {
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[[noreturn]] static void panic(const char* fmt, ...) {
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std::va_list args;
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va_start(args, fmt);
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std::cout << termcolor::on_red << "[FATAL] ";
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std::vprintf (fmt, args);
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std::cout << termcolor::reset << "\n";
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va_end(args);
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[[noreturn]] static void panic(const char* fmt, ...) {
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std::va_list args;
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va_start(args, fmt);
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std::cout << termcolor::on_red << "[FATAL] ";
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std::vprintf(fmt, args);
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std::cout << termcolor::reset << "\n";
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va_end(args);
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exit(1);
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}
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exit(1);
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}
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static void warn(const char* fmt, ...) {
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std::va_list args;
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va_start(args, fmt);
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std::cout << termcolor::on_red << "[Warning] ";
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std::vprintf (fmt, args);
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std::cout << termcolor::reset << "\n";
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va_end(args);
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}
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static void warn(const char* fmt, ...) {
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std::va_list args;
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va_start(args, fmt);
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std::cout << termcolor::on_red << "[Warning] ";
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std::vprintf(fmt, args);
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std::cout << termcolor::reset << "\n";
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va_end(args);
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}
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static std::vector <u8> loadROM(std::string directory) {
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std::ifstream file (directory, std::ios::binary);
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if (file.fail())
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panic("Couldn't read %s", directory.c_str());
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static std::vector<u8> loadROM(std::string directory) {
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std::ifstream file(directory, std::ios::binary);
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if (file.fail()) panic("Couldn't read %s", directory.c_str());
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std::vector<u8> ROM;
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std::vector<u8> ROM;
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file.unsetf(std::ios::skipws);
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ROM.insert(ROM.begin(),
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std::istream_iterator<uint8_t>(file),
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std::istream_iterator<uint8_t>());
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file.unsetf(std::ios::skipws);
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ROM.insert(ROM.begin(), std::istream_iterator<uint8_t>(file), std::istream_iterator<uint8_t>());
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file.close();
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file.close();
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printf ("%s loaded successfully\n", directory.c_str());
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return ROM;
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}
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printf("%s loaded successfully\n", directory.c_str());
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return ROM;
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}
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static constexpr bool buildingInDebugMode() {
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#ifdef NDEBUG
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return false;
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#endif
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static constexpr bool buildingInDebugMode() {
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#ifdef NDEBUG
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return false;
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#endif
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return true;
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}
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return true;
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}
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static void debug_printf (const char* fmt, ...) {
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if constexpr (buildingInDebugMode()) {
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std::va_list args;
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va_start(args, fmt);
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std::vprintf (fmt, args);
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va_end(args);
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}
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}
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static void debug_printf(const char* fmt, ...) {
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if constexpr (buildingInDebugMode()) {
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std::va_list args;
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va_start(args, fmt);
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std::vprintf(fmt, args);
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va_end(args);
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}
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}
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/// Sign extend an arbitrary-size value to 32 bits
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static constexpr u32 inline signExtend32 (u32 value, u32 startingSize) {
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auto temp = (s32) value;
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auto bitsToShift = 32 - startingSize;
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return (u32) (temp << bitsToShift >> bitsToShift);
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}
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/// Sign extend an arbitrary-size value to 32 bits
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static constexpr u32 inline signExtend32(u32 value, u32 startingSize) {
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auto temp = (s32)value;
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auto bitsToShift = 32 - startingSize;
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return (u32)(temp << bitsToShift >> bitsToShift);
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}
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/// Sign extend an arbitrary-size value to 16 bits
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static constexpr u16 signExtend16 (u16 value, u32 startingSize) {
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auto temp = (s16) value;
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auto bitsToShift = 16 - startingSize;
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return (u16) (temp << bitsToShift >> bitsToShift);
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}
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/// Sign extend an arbitrary-size value to 16 bits
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static constexpr u16 signExtend16(u16 value, u32 startingSize) {
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auto temp = (s16)value;
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auto bitsToShift = 16 - startingSize;
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return (u16)(temp << bitsToShift >> bitsToShift);
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}
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/// Create a mask with `count` number of one bits.
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template<typename T, usize count>
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static constexpr T ones () {
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template <typename T, usize count>
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static constexpr T ones() {
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constexpr usize bitsize = CHAR_BIT * sizeof(T);
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static_assert(count <= bitsize, "count larger than bitsize of T");
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@ -105,80 +109,74 @@ namespace Helpers {
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}
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/// Extract bits from an integer-type
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template<usize offset, typename T>
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static constexpr T getBit (T value) {
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return (value >> offset) & T(1);
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template <usize offset, typename T>
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static constexpr T getBit(T value) {
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return (value >> offset) & T(1);
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}
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/// Extract bits from an integer-type
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template<usize offset, usize bits, typename T>
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static constexpr T getBits (T value) {
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return (value >> offset) & ones<T, bits>();
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template <usize offset, usize bits, typename T>
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static constexpr T getBits(T value) {
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return (value >> offset) & ones<T, bits>();
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}
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/// Check if a bit "bit" of value is set
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static constexpr bool isBitSet (u32 value, int bit) {
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return (value >> bit) & 1;
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}
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/// Check if a bit "bit" of value is set
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static constexpr bool isBitSet(u32 value, int bit) { return (value >> bit) & 1; }
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/// rotate number right
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template <typename T>
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static constexpr T rotr (T value, int bits) {
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constexpr auto bitWidth = sizeof(T) * 8;
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bits &= bitWidth - 1;
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return (value >> bits) | (value << (bitWidth - bits));
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}
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/// rotate number right
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template <typename T>
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static constexpr T rotr(T value, int bits) {
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constexpr auto bitWidth = sizeof(T) * 8;
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bits &= bitWidth - 1;
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return (value >> bits) | (value << (bitWidth - bits));
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}
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// rotate number left
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template <typename T>
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static constexpr T rotl (T value, int bits) {
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constexpr auto bitWidth = sizeof(T) * 8;
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bits &= bitWidth - 1;
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return (value << bits) | (value >> (bitWidth - bits));
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}
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// rotate number left
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template <typename T>
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static constexpr T rotl(T value, int bits) {
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constexpr auto bitWidth = sizeof(T) * 8;
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bits &= bitWidth - 1;
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return (value << bits) | (value >> (bitWidth - bits));
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}
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/// Used to make the compiler evaluate beeg loops at compile time for the tablegen
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template <typename T, T Begin, class Func, T ...Is>
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static constexpr void static_for_impl( Func&& f, std::integer_sequence<T, Is...> ) {
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( f( std::integral_constant<T, Begin + Is>{ } ),... );
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}
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/// Used to make the compiler evaluate beeg loops at compile time for the tablegen
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template <typename T, T Begin, class Func, T... Is>
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static constexpr void static_for_impl(Func&& f, std::integer_sequence<T, Is...>) {
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(f(std::integral_constant<T, Begin + Is>{}), ...);
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}
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template <typename T, T Begin, T End, class Func>
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static constexpr void static_for(Func&& f) {
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static_for_impl<T, Begin>( std::forward<Func>(f), std::make_integer_sequence<T, End - Begin>{ } );
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}
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template <typename T, T Begin, T End, class Func>
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static constexpr void static_for(Func&& f) {
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static_for_impl<T, Begin>(std::forward<Func>(f), std::make_integer_sequence<T, End - Begin>{});
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}
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// For values < 0x99
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static constexpr inline u8 incBCDByte(u8 value) {
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return ((value & 0xf) == 0x9) ? value + 7 : value + 1;
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}
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// Use this helper for platforms that lack a working std::bit_cast implementation
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// TODO: Replace this with C++20 version if available
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template< class To, class From >
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constexpr To bit_cast( const From& from ) noexcept{
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return *reinterpret_cast<const To*>(&from);
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}
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};
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// For values < 0x99
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static constexpr inline u8 incBCDByte(u8 value) { return ((value & 0xf) == 0x9) ? value + 7 : value + 1; }
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#ifdef HELPERS_APPLE_CLANG
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template <class To, class From>
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constexpr To bit_cast(const From& from) noexcept {
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return *reinterpret_cast<const To*>(&from);
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}
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#else
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template <class To, class From>
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constexpr To bit_cast(const From& from) noexcept {
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return std::bit_cast<To, From>(from);
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}
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#endif
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}; // namespace Helpers
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// UDLs for memory size values
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constexpr size_t operator""_KB(unsigned long long int x) {
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return 1024ULL * x;
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}
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constexpr size_t operator""_MB(unsigned long long int x) {
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return 1024_KB * x;
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}
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constexpr size_t operator""_GB(unsigned long long int x) {
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return 1024_MB * x;
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}
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constexpr size_t operator""_KB(unsigned long long int x) { return 1024ULL * x; }
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constexpr size_t operator""_MB(unsigned long long int x) { return 1024_KB * x; }
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constexpr size_t operator""_GB(unsigned long long int x) { return 1024_MB * x; }
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// useful macros
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// likely/unlikely
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#ifdef __GNUC__
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#define likely(x) __builtin_expect((x),1)
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#define unlikely(x) __builtin_expect((x),0)
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#else
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#define likely(x) (x)
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#define unlikely(x) (x)
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#endif
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#define likely(x) __builtin_expect((x), 1)
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#define unlikely(x) __builtin_expect((x), 0)
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#else
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#define likely(x) (x)
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#define unlikely(x) (x)
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#endif
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