[2573] | 1 | #ifndef COMMON_HPP |
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| 2 | #define COMMON_HPP |
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| 3 | |
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| 4 | #ifdef _MSC_VER |
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| 5 | #define CPPTRACE_FORCE_NO_INLINE __declspec(noinline) |
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| 6 | #define CPPTRACE_PFUNC __FUNCSIG__ |
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| 7 | #define CPPTRACE_MAYBE_UNUSED |
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| 8 | #pragma warning(push) |
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| 9 | #pragma warning(disable: 4505) // Unused local function |
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| 10 | #else |
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| 11 | #define CPPTRACE_FORCE_NO_INLINE __attribute__((noinline)) |
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| 12 | #define CPPTRACE_PFUNC __extension__ __PRETTY_FUNCTION__ |
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| 13 | #define CPPTRACE_MAYBE_UNUSED __attribute__((unused)) |
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| 14 | #endif |
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| 15 | |
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| 16 | #include <cstdint> |
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| 17 | #include <cstdio> |
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| 18 | #include <cstdlib> |
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| 19 | #include <exception> |
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| 20 | #include <ios> |
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| 21 | #include <sstream> |
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| 22 | #include <string> |
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| 23 | #include <type_traits> |
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| 24 | #include <utility> |
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| 25 | #include <vector> |
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| 26 | #include <memory> |
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| 27 | #include <new> |
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| 28 | |
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| 29 | #define IS_WINDOWS 0 |
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| 30 | #define IS_LINUX 0 |
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| 31 | #define IS_APPLE 0 |
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| 32 | |
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| 33 | #if defined(_WIN32) |
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| 34 | #undef IS_WINDOWS |
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| 35 | #define IS_WINDOWS 1 |
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| 36 | #elif defined(__linux) |
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| 37 | #undef IS_LINUX |
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| 38 | #define IS_LINUX 1 |
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| 39 | #elif defined(__APPLE__) |
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| 40 | #undef IS_APPLE |
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| 41 | #define IS_APPLE 1 |
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| 42 | #else |
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| 43 | #error "Unexpected platform" |
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| 44 | #endif |
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| 45 | |
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| 46 | #define IS_CLANG 0 |
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| 47 | #define IS_GCC 0 |
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| 48 | #define IS_MSVC 0 |
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| 49 | |
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| 50 | #if defined(__clang__) |
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| 51 | #undef IS_CLANG |
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| 52 | #define IS_CLANG 1 |
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| 53 | #elif defined(__GNUC__) || defined(__GNUG__) |
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| 54 | #undef IS_GCC |
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| 55 | #define IS_GCC 1 |
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| 56 | #elif defined(_MSC_VER) |
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| 57 | #undef IS_MSVC |
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| 58 | #define IS_MSVC 1 |
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| 59 | #else |
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| 60 | #error "Unsupported compiler" |
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| 61 | #endif |
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| 62 | |
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| 63 | #if IS_WINDOWS |
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| 64 | #include <windows.h> |
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| 65 | #else |
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| 66 | #include <sys/stat.h> |
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| 67 | #endif |
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| 68 | |
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| 69 | // Lightweight std::source_location. |
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| 70 | struct source_location { |
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| 71 | // NOLINTNEXTLINE(cppcoreguidelines-avoid-const-or-ref-data-members) |
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| 72 | const char* const file; |
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| 73 | //const char* const function; // disabled for now due to static constexpr restrictions |
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| 74 | // NOLINTNEXTLINE(cppcoreguidelines-avoid-const-or-ref-data-members) |
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| 75 | const int line; |
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| 76 | constexpr source_location( |
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| 77 | //const char* _function /*= __builtin_FUNCTION()*/, |
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| 78 | // const char* _file = __builtin_FILE(), |
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| 79 | // int _line = __builtin_LINE() |
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| 80 | const char* _file = __FILE__, |
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| 81 | int _line = __LINE__ |
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| 82 | ) : file(_file), /*function(_function),*/ line(_line) {} |
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| 83 | }; |
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| 84 | |
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| 85 | CPPTRACE_MAYBE_UNUSED |
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| 86 | static void primitive_assert_impl( |
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| 87 | bool condition, |
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| 88 | bool verify, |
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| 89 | const char* expression, |
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| 90 | const char* signature, |
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| 91 | source_location location, |
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| 92 | const char* message = nullptr |
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| 93 | ) { |
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| 94 | if(!condition) { |
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| 95 | const char* action = verify ? "verification" : "assertion"; |
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| 96 | const char* name = verify ? "verify" : "assert"; |
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| 97 | if(message == nullptr) { |
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| 98 | (void) fprintf( |
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| 99 | stderr, |
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| 100 | "Cpptrace %s failed at %s:%d: %s\n", |
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| 101 | action, location.file, location.line, signature |
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| 102 | ); |
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| 103 | } else { |
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| 104 | (void) fprintf( |
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| 105 | stderr, |
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| 106 | "Cpptrace %s failed at %s:%d: %s: %s\n", |
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| 107 | action, location.file, location.line, signature, message |
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| 108 | ); |
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| 109 | } |
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| 110 | (void) fprintf(stderr, " primitive_%s(%s);\n", name, expression); |
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| 111 | std::abort(); |
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| 112 | } |
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| 113 | } |
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| 114 | |
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| 115 | template<typename T> |
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| 116 | void nothing() {} |
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| 117 | #define PHONY_USE(E) (nothing<decltype(E)>()) |
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| 118 | |
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| 119 | // Still present in release mode, nonfatal |
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| 120 | #define internal_verify(c, ...) primitive_assert_impl(c, true, #c, CPPTRACE_PFUNC, {}, ##__VA_ARGS__) |
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| 121 | |
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| 122 | #ifndef NDEBUG |
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| 123 | #define CPPTRACE_PRIMITIVE_ASSERT(c, ...) \ |
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| 124 | primitive_assert_impl(c, false, #c, CPPTRACE_PFUNC, {}, ##__VA_ARGS__) |
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| 125 | #else |
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| 126 | #define CPPTRACE_PRIMITIVE_ASSERT(c, ...) PHONY_USE(c) |
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| 127 | #endif |
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| 128 | |
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| 129 | CPPTRACE_MAYBE_UNUSED |
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| 130 | static std::vector<std::string> split(const std::string& str, const std::string& delims) { |
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| 131 | std::vector<std::string> vec; |
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| 132 | size_t old_pos = 0; |
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| 133 | size_t pos = 0; |
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| 134 | while((pos = str.find_first_of(delims, old_pos)) != std::string::npos) { |
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| 135 | vec.emplace_back(str.substr(old_pos, pos - old_pos)); |
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| 136 | old_pos = pos + 1; |
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| 137 | } |
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| 138 | vec.emplace_back(str.substr(old_pos)); |
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| 139 | return vec; |
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| 140 | } |
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| 141 | |
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| 142 | template<typename C> |
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| 143 | CPPTRACE_MAYBE_UNUSED |
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| 144 | static std::string join(const C& container, const std::string& delim) { |
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| 145 | auto iter = std::begin(container); |
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| 146 | auto end = std::end(container); |
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| 147 | std::string str; |
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| 148 | if(std::distance(iter, end) > 0) { |
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| 149 | str += *iter; |
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| 150 | while(++iter != end) { |
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| 151 | str += delim; |
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| 152 | str += *iter; |
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| 153 | } |
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| 154 | } |
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| 155 | return str; |
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| 156 | } |
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| 157 | |
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| 158 | constexpr const char* const whitespace = " \t\n\r\f\v"; |
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| 159 | |
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| 160 | CPPTRACE_MAYBE_UNUSED |
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| 161 | static std::string trim(const std::string& str) { |
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| 162 | if(str.empty()) { |
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| 163 | return ""; |
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| 164 | } |
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| 165 | const size_t left = str.find_first_not_of(whitespace); |
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| 166 | const size_t right = str.find_last_not_of(whitespace) + 1; |
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| 167 | return str.substr(left, right - left); |
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| 168 | } |
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| 169 | |
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| 170 | CPPTRACE_MAYBE_UNUSED |
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| 171 | static std::string to_hex(uintptr_t addr) { |
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| 172 | std::stringstream sstream; |
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| 173 | sstream<<std::hex<<addr; |
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| 174 | return std::move(sstream).str(); |
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| 175 | } |
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| 176 | |
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| 177 | CPPTRACE_MAYBE_UNUSED |
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| 178 | static bool is_little_endian() { |
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| 179 | uint16_t num = 0x1; |
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| 180 | auto* ptr = (uint8_t*)# |
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| 181 | return ptr[0] == 1; |
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| 182 | } |
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| 183 | |
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| 184 | // Modified from |
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| 185 | // https://stackoverflow.com/questions/105252/how-do-i-convert-between-big-endian-and-little-endian-values-in-c |
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| 186 | template<typename T, size_t N> |
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| 187 | struct byte_swapper; |
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| 188 | |
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| 189 | template<typename T> |
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| 190 | struct byte_swapper<T, 1> { |
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| 191 | T operator()(T val) { |
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| 192 | return val; |
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| 193 | } |
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| 194 | }; |
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| 195 | |
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| 196 | template<typename T> |
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| 197 | struct byte_swapper<T, 2> { |
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| 198 | T operator()(T val) { |
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| 199 | return ((((val) >> 8) & 0xff) | (((val) & 0xff) << 8)); |
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| 200 | } |
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| 201 | }; |
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| 202 | |
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| 203 | template<typename T> |
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| 204 | struct byte_swapper<T, 4> { |
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| 205 | T operator()(T val) { |
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| 206 | return ((((val) & 0xff000000) >> 24) | |
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| 207 | (((val) & 0x00ff0000) >> 8) | |
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| 208 | (((val) & 0x0000ff00) << 8) | |
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| 209 | (((val) & 0x000000ff) << 24)); |
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| 210 | } |
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| 211 | }; |
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| 212 | |
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| 213 | template<typename T> |
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| 214 | struct byte_swapper<T, 8> { |
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| 215 | T operator()(T val) { |
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| 216 | return ((((val) & 0xff00000000000000ull) >> 56) | |
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| 217 | (((val) & 0x00ff000000000000ull) >> 40) | |
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| 218 | (((val) & 0x0000ff0000000000ull) >> 24) | |
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| 219 | (((val) & 0x000000ff00000000ull) >> 8 ) | |
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| 220 | (((val) & 0x00000000ff000000ull) << 8 ) | |
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| 221 | (((val) & 0x0000000000ff0000ull) << 24) | |
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| 222 | (((val) & 0x000000000000ff00ull) << 40) | |
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| 223 | (((val) & 0x00000000000000ffull) << 56)); |
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| 224 | } |
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| 225 | }; |
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| 226 | |
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| 227 | template<typename T, typename std::enable_if<std::is_integral<T>::value, int>::type = 0> |
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| 228 | T byteswap(T value) { |
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| 229 | return byte_swapper<T, sizeof(T)>{}(value); |
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| 230 | } |
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| 231 | |
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| 232 | CPPTRACE_MAYBE_UNUSED |
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| 233 | inline void enable_virtual_terminal_processing_if_needed() { |
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| 234 | // enable colors / ansi processing if necessary |
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| 235 | #if IS_WINDOWS |
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| 236 | // https://docs.microsoft.com/en-us/windows/console/console-virtual-terminal-sequences#example-of-enabling-virtual-terminal-processing |
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| 237 | #ifndef ENABLE_VIRTUAL_TERMINAL_PROCESSING |
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| 238 | constexpr DWORD ENABLE_VIRTUAL_TERMINAL_PROCESSING = 0x4; |
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| 239 | #endif |
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| 240 | HANDLE hOut = GetStdHandle(STD_OUTPUT_HANDLE); |
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| 241 | DWORD dwMode = 0; |
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| 242 | if(hOut == INVALID_HANDLE_VALUE) return; |
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| 243 | if(!GetConsoleMode(hOut, &dwMode)) return; |
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| 244 | if(dwMode != (dwMode | ENABLE_VIRTUAL_TERMINAL_PROCESSING)) |
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| 245 | if(!SetConsoleMode(hOut, dwMode | ENABLE_VIRTUAL_TERMINAL_PROCESSING)) return; |
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| 246 | #endif |
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| 247 | } |
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| 248 | |
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| 249 | CPPTRACE_MAYBE_UNUSED |
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| 250 | // NOLINTNEXTLINE(misc-no-recursion) |
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| 251 | inline constexpr unsigned n_digits(unsigned value) { |
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| 252 | return value < 10 ? 1 : 1 + n_digits(value / 10); |
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| 253 | } |
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| 254 | static_assert(n_digits(1) == 1, "n_digits utility producing the wrong result"); |
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| 255 | static_assert(n_digits(9) == 1, "n_digits utility producing the wrong result"); |
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| 256 | static_assert(n_digits(10) == 2, "n_digits utility producing the wrong result"); |
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| 257 | static_assert(n_digits(11) == 2, "n_digits utility producing the wrong result"); |
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| 258 | static_assert(n_digits(1024) == 4, "n_digits utility producing the wrong result"); |
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| 259 | |
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| 260 | // TODO: Re-evaluate use of off_t |
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| 261 | template<typename T, typename std::enable_if<std::is_pod<T>::value, int>::type = 0> |
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| 262 | T load_bytes(FILE* obj_file, off_t offset) { |
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| 263 | T object; |
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| 264 | internal_verify(fseek(obj_file, offset, SEEK_SET) == 0, "fseek error"); |
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| 265 | internal_verify(fread(&object, sizeof(T), 1, obj_file) == 1, "fread error"); |
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| 266 | return object; |
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| 267 | } |
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| 268 | |
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| 269 | class file_error : std::exception { |
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| 270 | const char* what() const noexcept override { |
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| 271 | return "Unable to read file"; |
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| 272 | } |
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| 273 | }; |
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| 274 | |
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| 275 | struct nullopt_t {}; |
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| 276 | |
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| 277 | static constexpr nullopt_t nullopt; |
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| 278 | |
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| 279 | template<typename T, typename std::enable_if<!std::is_same<typename std::decay<T>::type, void>::value, int>::type = 0> |
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| 280 | class optional { |
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| 281 | bool holds_value = false; |
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| 282 | |
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| 283 | union { |
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| 284 | T uvalue; |
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| 285 | }; |
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| 286 | |
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| 287 | public: |
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| 288 | // clang-tidy false positive |
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| 289 | // NOLINTNEXTLINE(modernize-use-equals-default) |
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| 290 | optional() noexcept {} |
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| 291 | |
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| 292 | optional(nullopt_t) noexcept {} |
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| 293 | |
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| 294 | ~optional() { |
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| 295 | reset(); |
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| 296 | } |
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| 297 | |
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| 298 | optional(const optional& other) : holds_value(other.holds_value) { |
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| 299 | if(holds_value) { |
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| 300 | new (static_cast<void*>(std::addressof(uvalue))) T(other.uvalue); |
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| 301 | } |
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| 302 | } |
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| 303 | |
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| 304 | optional(optional&& other) noexcept(std::is_nothrow_move_constructible<T>::value) : holds_value(other.holds_value) { |
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| 305 | if(holds_value) { |
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| 306 | new (static_cast<void*>(std::addressof(uvalue))) T(std::move(other.uvalue)); |
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| 307 | } |
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| 308 | } |
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| 309 | |
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| 310 | optional& operator=(const optional& other) { |
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| 311 | optional copy(other); |
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| 312 | swap(*this, copy); |
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| 313 | return *this; |
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| 314 | } |
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| 315 | |
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| 316 | optional& operator=(optional&& other) noexcept( |
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| 317 | std::is_nothrow_move_assignable<T>::value && std::is_nothrow_move_constructible<T>::value |
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| 318 | ) { |
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| 319 | reset(); |
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| 320 | if(other.holds_value) { |
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| 321 | new (static_cast<void*>(std::addressof(uvalue))) T(std::move(other.uvalue)); |
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| 322 | holds_value = true; |
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| 323 | } |
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| 324 | return *this; |
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| 325 | } |
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| 326 | |
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| 327 | template< |
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| 328 | typename U = T, |
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| 329 | typename std::enable_if<!std::is_same<typename std::decay<U>::type, optional<T>>::value, int>::type = 0 |
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| 330 | > |
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| 331 | // clang-tidy false positive |
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| 332 | // NOLINTNEXTLINE(bugprone-forwarding-reference-overload) |
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| 333 | optional(U&& value) : holds_value(true) { |
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| 334 | new (static_cast<void*>(std::addressof(uvalue))) T(std::forward<U>(value)); |
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| 335 | } |
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| 336 | |
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| 337 | template< |
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| 338 | typename U = T, |
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| 339 | typename std::enable_if<!std::is_same<typename std::decay<U>::type, optional<T>>::value, int>::type = 0 |
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| 340 | > |
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| 341 | optional& operator=(U&& value) { |
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| 342 | if(holds_value) { |
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| 343 | uvalue = std::forward<U>(value); |
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| 344 | } else { |
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| 345 | new (static_cast<void*>(std::addressof(uvalue))) T(std::forward<U>(value)); |
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| 346 | holds_value = true; |
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| 347 | } |
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| 348 | return *this; |
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| 349 | } |
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| 350 | |
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| 351 | optional& operator=(nullopt_t) noexcept { |
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| 352 | reset(); |
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| 353 | return *this; |
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| 354 | } |
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| 355 | |
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| 356 | void swap(optional& other) { |
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| 357 | if(holds_value && other.holds_value) { |
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| 358 | std::swap(uvalue, other.uvalue); |
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| 359 | } else if(holds_value && !other.holds_value) { |
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| 360 | new (&other.uvalue) T(std::move(uvalue)); |
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| 361 | uvalue.~T(); |
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| 362 | } else if(!holds_value && other.holds_value) { |
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| 363 | new (static_cast<void*>(std::addressof(uvalue))) T(std::move(other.uvalue)); |
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| 364 | other.uvalue.~T(); |
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| 365 | } |
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| 366 | std::swap(holds_value, other.holds_value); |
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| 367 | } |
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| 368 | |
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| 369 | bool has_value() const { |
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| 370 | return holds_value; |
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| 371 | } |
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| 372 | |
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| 373 | operator bool() const { |
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| 374 | return holds_value; |
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| 375 | } |
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| 376 | |
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| 377 | void reset() { |
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| 378 | if(holds_value) { |
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| 379 | uvalue.~T(); |
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| 380 | } |
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| 381 | holds_value = false; |
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| 382 | } |
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| 383 | |
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| 384 | T& unwrap() & { |
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| 385 | if(!holds_value) { |
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| 386 | throw std::runtime_error{"Optional does not contain a value"}; |
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| 387 | } |
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| 388 | return uvalue; |
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| 389 | } |
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| 390 | |
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| 391 | const T& unwrap() const & { |
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| 392 | if(!holds_value) { |
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| 393 | throw std::runtime_error{"Optional does not contain a value"}; |
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| 394 | } |
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| 395 | return uvalue; |
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| 396 | } |
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| 397 | |
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| 398 | T&& unwrap() && { |
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| 399 | if(!holds_value) { |
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| 400 | throw std::runtime_error{"Optional does not contain a value"}; |
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| 401 | } |
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| 402 | return std::move(uvalue); |
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| 403 | } |
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| 404 | |
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| 405 | const T&& unwrap() const && { |
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| 406 | if(!holds_value) { |
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| 407 | throw std::runtime_error{"Optional does not contain a value"}; |
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| 408 | } |
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| 409 | return std::move(uvalue); |
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| 410 | } |
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| 411 | |
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| 412 | template<typename U> |
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| 413 | T value_or(U&& default_value) const & { |
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| 414 | return holds_value ? uvalue : static_cast<T>(std::forward<U>(default_value)); |
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| 415 | } |
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| 416 | |
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| 417 | template<typename U> |
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| 418 | T value_or(U&& default_value) && { |
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| 419 | return holds_value ? std::move(uvalue) : static_cast<T>(std::forward<U>(default_value)); |
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| 420 | } |
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| 421 | }; |
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| 422 | |
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| 423 | // shamelessly stolen from stackoverflow |
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| 424 | CPPTRACE_MAYBE_UNUSED |
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| 425 | static bool directory_exists(const std::string& path) { |
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| 426 | #if IS_WINDOWS |
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| 427 | DWORD dwAttrib = GetFileAttributesA(path.c_str()); |
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| 428 | return dwAttrib != INVALID_FILE_ATTRIBUTES && (dwAttrib & FILE_ATTRIBUTE_DIRECTORY); |
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| 429 | #else |
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| 430 | struct stat sb; |
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| 431 | return stat(path.c_str(), &sb) == 0 && S_ISDIR(sb.st_mode); |
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| 432 | #endif |
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| 433 | } |
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| 434 | |
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| 435 | CPPTRACE_MAYBE_UNUSED |
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| 436 | static std::string basename(const std::string& path) { |
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| 437 | // Assumes no trailing /'s |
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| 438 | auto pos = path.rfind('/'); |
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| 439 | if(pos == std::string::npos) { |
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| 440 | return path; |
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| 441 | } else { |
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| 442 | return path.substr(pos + 1); |
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| 443 | } |
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| 444 | } |
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| 445 | |
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| 446 | #ifdef _MSC_VER |
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| 447 | #pragma warning(pop) |
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| 448 | #endif |
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| 449 | |
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| 450 | #endif |
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