diff options
Diffstat (limited to 'rcc')
| -rw-r--r-- | rcc/CMakeLists.txt | 2 | ||||
| -rw-r--r-- | rcc/include/rcc/ADT/STLFunctionalExtras.h | 112 | ||||
| -rw-r--r-- | rcc/include/rcc/Support/Compiler.h | 853 | ||||
| -rw-r--r-- | rcc/include/rcc/Support/Errno.h | 64 | ||||
| -rw-r--r-- | rcc/include/rcc/Support/ErrorOr.h | 378 | ||||
| -rw-r--r-- | rcc/include/rcc/Support/MathExtras.h | 1050 | ||||
| -rw-r--r-- | rcc/lib/CMakeLists.txt | 7 | ||||
| -rw-r--r-- | rcc/lib/Support/Errno.cc | 79 | ||||
| -rw-r--r-- | rcc/lib/Support/MathExtras.cc | 97 |
9 files changed, 1 insertions, 2641 deletions
diff --git a/rcc/CMakeLists.txt b/rcc/CMakeLists.txt index 86f1c80..3825e8a 100644 --- a/rcc/CMakeLists.txt +++ b/rcc/CMakeLists.txt @@ -66,7 +66,7 @@ install(DIRECTORY "${RCC_BINARY_DIR}/include/rcc" DESTINATION "${CMAKE_INSTALL_I FILES_MATCHING PATTERN "*.h" PATTERN "*.inc" PATTERN "*.def" PATTERN "CMakeFiles" EXCLUDE PATTERN "config.h" EXCLUDE) -add_subdirectory(lib) +add_subdirectory("${RCC_SOURCE_DIR}/../libsupport" "${CMAKE_CURRENT_BINARY_DIR}/libsupport") add_subdirectory(tools) foreach(rccProject IN LISTS RCC_ENABLE_PROJECTS) if(NOT rccProject STREQUAL "cfront") diff --git a/rcc/include/rcc/ADT/STLFunctionalExtras.h b/rcc/include/rcc/ADT/STLFunctionalExtras.h deleted file mode 100644 index 71a5b85..0000000 --- a/rcc/include/rcc/ADT/STLFunctionalExtras.h +++ /dev/null @@ -1,112 +0,0 @@ -/* - R *CC-Project - - Copyright (C) 2026 Richard Qin - - This file is part of RCC-Project. - - RCC-Project is free software; you can redistribute it and/or modify it under - the terms of the GNU General Public License as published by the Free - Software Foundation; either version 3 of the License, or (at your option) any - later version. - - RCC-Project is distributed in the hope that it will be useful, but WITHOUT ANY - WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR - A PARTICULAR PURPOSE. See the GNU General Public License for more details. - - You should have received a copy of the GNU General Public License along with - RCC-Project; see the file COPYING. If not see - <http://www.gnu.org/licenses/>. - */ - -//===- llvm/ADT/STLFunctionalExtras.h - Extras for <functional> -*- C++ -*-===// -// -// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. -// See https://llvm.org/LICENSE.txt for license information. -// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception -// -//===----------------------------------------------------------------------===// -// -// This file contains some extension to <functional>. -// -// No library is required when using these functions. -// -//===----------------------------------------------------------------------===// - -#ifndef RCC_ADT_STLFUNCTIONALEXTRAS_H -#define RCC_ADT_STLFUNCTIONALEXTRAS_H - -#include "rcc/Support/Compiler.h" - -#include <cstddef -#include <cstdint> -#include <type_traits> -#include <utility> - -namespace rcc -{ - -//===----------------------------------------------------------------------===// -// Extra additions to <functional> -//===----------------------------------------------------------------------===// - -/// An efficient, type-erasing, non-owning reference to a callable. This is -/// intended for use as the type of a function parameter that is not used -/// after the function in question returns. -/// -/// This class does not own the callable, so it is not in general safe to store -/// a function_ref. -template <typename Fn> class function_ref; - -template <typename Ret, typename... Params> -class RCC_GSL_POINTER function_ref<Ret (Params...)> -{ - Ret (*callback) (intptr_t callable, Params... params) = nullptr; - intptr_t callable = 0; - - template <typename Callable> - static Ret - callback_fn (intptr_t callable, Params... params) - { - return (*reinterpret_cast<Callable *> (callable)) ( - std::forward<Params> (params)...); - } - -public: - function_ref () = default; - function_ref (std::nullptr_t) - { - } - - template <typename Callable> - function_ref ( - Callable &&callable RCC_LIFETIME_BOUND, - // This is not the copy-constructor. - std::enable_if_t<!std::is_same<std::remove_cvref_t<Callable>, - function_ref>::value> * = nullptr, - // Functor must be callable and return a suitable type. - std::enable_if_t<std::is_void<Ret>::value || - std::is_convertible<decltype (std::declval<Callable> () ( - std::declval<Params> ()...)), - Ret>::value> * = nullptr) - : callback (callback_fn<std::remove_reference_t<Callable>>), - callable (reinterpret_cast<intptr_t> (&callable)) - { - } - - Ret - operator() (Params... params) const - { - return callback (callable, std::forward<Params> (params)...); - } - - explicit - operator bool () const - { - return callback; - } -}; - -} // end namespace rcc - -#endif // RCC_ADT_STLFUNCTIONALEXTRAS_H diff --git a/rcc/include/rcc/Support/Compiler.h b/rcc/include/rcc/Support/Compiler.h deleted file mode 100644 index 511c4cd..0000000 --- a/rcc/include/rcc/Support/Compiler.h +++ /dev/null @@ -1,853 +0,0 @@ -/* - RCC-Project - - Copyright (C) 2026 Richard Qin - - This file is part of RCC-Project. - - RCC-Project is free software; you can redistribute it and/or modify it under - the terms of the GNU General Public License as published by the Free - Software Foundation; either version 3 of the License, or (at your option) any - later version. - - RCC-Project is distributed in the hope that it will be useful, but WITHOUT ANY - WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR - A PARTICULAR PURPOSE. See the GNU General Public License for more details. - - You should have received a copy of the GNU General Public License along with - RCC-Project; see the file COPYING. If not see - <http://www.gnu.org/licenses/>. -*/ - -//===-- llvm/Support/Compiler.h - Compiler abstraction support --*- C++ -*-===// -// -// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. -// See https://llvm.org/LICENSE.txt for license information. -// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception -// -//===----------------------------------------------------------------------===// -// -// This file defines several macros, based on the current compiler. This allows -// use of compiler-specific features in a way that remains portable. This header -// can be included from either C or C++. -// -//===----------------------------------------------------------------------===// - -#ifndef RCC_SUPPORT_COMPILER_H -#define RCC_SUPPORT_COMPILER_H - -#include "rcc/Config/rcc-config.h" - -#include <stddef.h> - -#if defined(_MSC_VER) -#include <sal.h> -#endif - -#ifndef __has_feature -#define __has_feature(x) 0 -#endif - -#ifndef __has_extension -#define __has_extension(x) 0 -#endif - -#ifndef __has_attribute -#define __has_attribute(x) 0 -#endif - -#ifndef __has_builtin -#define __has_builtin(x) 0 -#endif - -#ifndef __has_warning -#define __has_warning(x) 0 -#endif - -// Only use __has_cpp_attribute in C++ mode. GCC defines __has_cpp_attribute in -// C mode, but the :: in __has_cpp_attribute(scoped::attribute) is invalid. -#ifndef RCC_HAS_CPP_ATTRIBUTE -#if defined(__cplusplus) && defined(__has_cpp_attribute) -#define RCC_HAS_CPP_ATTRIBUTE(x) __has_cpp_attribute (x) -#else -#define RCC_HAS_CPP_ATTRIBUTE(x) 0 -#endif -#endif - -/// \macro RCC_GNUC_PREREQ -/// Extend the default __GNUC_PREREQ even if glibc's features.h isn't -/// available. -#ifndef RCC_GNUC_PREREQ -#if defined(__GNUC__) && defined(__GNUC_MINOR__) && defined(__GNUC_PATCHLEVEL__) -#define RCC_GNUC_PREREQ(maj, min, patch) \ - ((__GNUC__ << 20) + (__GNUC_MINOR__ << 10) + __GNUC_PATCHLEVEL__ >= \ - ((maj) << 20) + ((min) << 10) + (patch)) -#elif defined(__GNUC__) && defined(__GNUC_MINOR__) -#define RCC_GNUC_PREREQ(maj, min, patch) \ - ((__GNUC__ << 20) + (__GNUC_MINOR__ << 10) >= ((maj) << 20) + ((min) << 10)) -#else -#define RCC_GNUC_PREREQ(maj, min, patch) 0 -#endif -#endif - -/// \macro RCC_MSC_PREREQ -/// Is the compiler MSVC of at least the specified version? -/// The common \param version values to check for are: -/// * 1910: VS2017, version 15.1 & 15.2 -/// * 1911: VS2017, version 15.3 & 15.4 -/// * 1912: VS2017, version 15.5 -/// * 1913: VS2017, version 15.6 -/// * 1914: VS2017, version 15.7 -/// * 1915: VS2017, version 15.8 -/// * 1916: VS2017, version 15.9 -/// * 1920: VS2019, version 16.0 -/// * 1921: VS2019, version 16.1 -/// * 1922: VS2019, version 16.2 -/// * 1923: VS2019, version 16.3 -/// * 1924: VS2019, version 16.4 -/// * 1925: VS2019, version 16.5 -/// * 1926: VS2019, version 16.6 -/// * 1927: VS2019, version 16.7 -/// * 1928: VS2019, version 16.8 + 16.9 -/// * 1929: VS2019, version 16.10 + 16.11 -/// * 1930: VS2022, version 17.0 -#ifdef _MSC_VER -#define RCC_MSC_PREREQ(version) (_MSC_VER >= (version)) - -// We require at least VS 2019. -#if !defined(RCC_FORCE_USE_OLD_TOOLCHAIN) -#if !RCC_MSC_PREREQ(1920) -#error RCC requires at least VS 2019. -#endif -#endif - -#else -#define RCC_MSC_PREREQ(version) 0 -#endif - -/// RCC_LIBRARY_VISIBILITY - If a class marked with this attribute is linked -/// into a shared library, then the class should be private to the library and -/// not accessible from outside it. Can also be used to mark variables and -/// functions, making them private to any shared library they are linked into. -/// On PE/COFF targets, library visibility is the default, so this isn't needed. -/// -/// RCC_EXTERNAL_VISIBILITY - classes, functions, and variables marked with -/// this attribute will be made public and visible outside of any shared library -/// they are linked in to. - -#if RCC_HAS_CPP_ATTRIBUTE(gnu::visibility) && defined(__GNUC__) && \ - !defined(__clang__) -#define RCC_ATTRIBUTE_VISIBILITY_HIDDEN [[gnu::visibility ("hidden")]] -#define RCC_ATTRIBUTE_VISIBILITY_DEFAULT [[gnu::visibility ("default")]] -#elif __has_attribute(visibility) -#define RCC_ATTRIBUTE_VISIBILITY_HIDDEN __attribute__ ((visibility ("hidden"))) -#define RCC_ATTRIBUTE_VISIBILITY_DEFAULT \ - __attribute__ ((visibility ("default"))) -#else -#define RCC_ATTRIBUTE_VISIBILITY_HIDDEN -#define RCC_ATTRIBUTE_VISIBILITY_DEFAULT -#endif - -#if defined(RCC_BUILD_RCC_DYLIB) || defined(RCC_BUILD_SHARED_LIBS) -#define RCC_EXTERNAL_VISIBILITY RCC_ATTRIBUTE_VISIBILITY_DEFAULT -#else -#define RCC_EXTERNAL_VISIBILITY -#endif - -#if (!(defined(_WIN32) || defined(__CYGWIN__)) || \ - ((defined(__MINGW32__) || defined(__CYGWIN__)) && defined(__clang__))) -#define RCC_LIBRARY_VISIBILITY RCC_ATTRIBUTE_VISIBILITY_HIDDEN -// Clang compilers older then 15 do not support gnu style attributes on -// namespaces. -#if defined(__clang__) && __clang_major__ < 15 -#define RCC_LIBRARY_VISIBILITY_NAMESPACE [[gnu::visibility ("hidden")]] -#else -#define RCC_LIBRARY_VISIBILITY_NAMESPACE RCC_ATTRIBUTE_VISIBILITY_HIDDEN -#endif -#define RCC_ALWAYS_EXPORT RCC_ATTRIBUTE_VISIBILITY_DEFAULT -#elif defined(_WIN32) -#define RCC_ALWAYS_EXPORT __declspec (dllexport) -#define RCC_LIBRARY_VISIBILITY -#define RCC_LIBRARY_VISIBILITY_NAMESPACE -#else -#define RCC_LIBRARY_VISIBILITY -#define RCC_ALWAYS_EXPORT -#define RCC_LIBRARY_VISIBILITY_NAMESPACE -#endif - -/// RCC_ABI is the main export/visibility macro to mark something as explicitly -/// exported when rcc is built as a shared library with everything else that is -/// unannotated will have internal visibility. -/// -/// RCC_ABI_EXPORT is for the special case for things like plugin symbol -/// declarations or definitions where we don't want the macro to be switching -/// between dllexport and dllimport on windows based on what codebase is being -/// built, it will only be dllexport. For non windows platforms this macro -/// behaves the same as RCC_ABI. -/// -/// RCC_EXPORT_TEMPLATE is used on explicit template instantiations in source -/// files that were declared extern in a header. This macro is only set as a -/// compiler export attribute on windows, on other platforms it does nothing. -/// -/// RCC_TEMPLATE_ABI is for annotating extern template declarations in headers -/// for both functions and classes. On windows its turned in to dllimport for -/// library consumers, for other platforms its a default visibility attribute. -/// -/// RCC_ABI_FOR_TEST is for annotating symbols that are exported from a -/// library-internal header solely so that unit tests can link against them. -/// Symbols in RCC's public headers are part of the RCC public interface and -/// should use RCC_ABI. RCC_ABI_FOR_TEST is reserved for internal headers, -/// whose symbols could be conditionally excluded when not building tests in the -/// future. -/// -#ifndef RCC_ABI_GENERATING_ANNOTATIONS -// Marker to add to classes or functions in public headers that should not have -// export macros added to them by the clang tool -#define RCC_ABI_NOT_EXPORTED -// TODO(https://github.com/rcc/rcc-project/issues/145406): eliminate need for -// two preprocessor definitions to gate RCC_ABI macro definitions. -#if defined(RCC_ENABLE_RCC_EXPORT_ANNOTATIONS) && !defined(RCC_BUILD_STATIC) -#if defined(_WIN32) && !defined(__MINGW32__) -#if defined(RCC_EXPORTS) -#define RCC_ABI __declspec (dllexport) -#define RCC_TEMPLATE_ABI -#define RCC_EXPORT_TEMPLATE __declspec (dllexport) -#else -#define RCC_ABI __declspec (dllimport) -#define RCC_TEMPLATE_ABI __declspec (dllimport) -#define RCC_EXPORT_TEMPLATE -#endif -#define RCC_ABI_EXPORT __declspec (dllexport) -#elif __has_attribute(visibility) -#if defined(__ELF__) || defined(__MINGW32__) || defined(_AIX) || \ - defined(__MVS__) || defined(__CYGWIN__) -#define RCC_ABI __attribute__ ((visibility ("default"))) -#define RCC_TEMPLATE_ABI RCC_ABI -#define RCC_EXPORT_TEMPLATE -#define RCC_ABI_EXPORT RCC_ABI -#elif defined(__MACH__) || defined(__wasm__) || defined(__EMSCRIPTEN__) -#define RCC_ABI __attribute__ ((visibility ("default"))) -#define RCC_TEMPLATE_ABI -#define RCC_EXPORT_TEMPLATE -#define RCC_ABI_EXPORT RCC_ABI -#endif -#endif -#endif -#if !defined(RCC_ABI) -#define RCC_ABI -#define RCC_TEMPLATE_ABI -#define RCC_EXPORT_TEMPLATE -#define RCC_ABI_EXPORT -#endif -#define RCC_ABI_FOR_TEST RCC_ABI -#endif - -#if defined(__GNUC__) -#define RCC_PREFETCH(addr, rw, locality) __builtin_prefetch (addr, rw, locality) -#else -#define RCC_PREFETCH(addr, rw, locality) -#endif - -#if __has_attribute(uninitialized) -#define RCC_ATTRIBUTE_UNINITIALIZED __attribute__ ((uninitialized)) -#else -#define RCC_ATTRIBUTE_UNINITIALIZED -#endif - -#if __has_attribute(used) -#define RCC_ATTRIBUTE_USED __attribute__ ((__used__)) -#else -#define RCC_ATTRIBUTE_USED -#endif - -#if __has_attribute(warn_unused) -#define RCC_ATTRIBUTE_WARN_UNUSED __attribute__ ((warn_unused)) -#else -#define RCC_ATTRIBUTE_WARN_UNUSED -#endif - -// Only enabled for clang: -// See https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99587 -// GCC may produce "warning: 'retain' attribute ignored" (despite -// __has_attribute(retain) being 1). -#if defined(__clang__) && __has_attribute(retain) -#define RCC_ATTRIBUTE_RETAIN __attribute__ ((__retain__)) -#else -#define RCC_ATTRIBUTE_RETAIN -#endif - -// For deprecations that are not a simple rename, use [[deprecated(MSG)]] -// instead. -#if defined(__clang__) -#define RCC_DEPRECATED_WITH_FIXIT(MSG, FIX) \ - __attribute__ ((deprecated (MSG, FIX))) -#else -#define RCC_DEPRECATED_WITH_FIXIT(MSG, FIX) [[deprecated (MSG)]] -#endif - -// clang-format off -#if defined(__clang__) || defined(__GNUC__) -#define RCC_SUPPRESS_DEPRECATED_DECLARATIONS_PUSH \ - _Pragma("GCC diagnostic push") \ - _Pragma("GCC diagnostic ignored \"-Wdeprecated-declarations\"") -#define RCC_SUPPRESS_DEPRECATED_DECLARATIONS_POP \ - _Pragma("GCC diagnostic pop") -#elif defined(_MSC_VER) -#define RCC_SUPPRESS_DEPRECATED_DECLARATIONS_PUSH \ - __pragma(warning(push)) \ - __pragma(warning(disable : 4996)) -#define RCC_SUPPRESS_DEPRECATED_DECLARATIONS_POP \ - __pragma(warning(pop)) -#else -#define RCC_SUPPRESS_DEPRECATED_DECLARATIONS_PUSH -#define RCC_SUPPRESS_DEPRECATED_DECLARATIONS_POP -#endif -// clang-format on - -// Indicate that a non-static, non-const C++ member function reinitializes -// the entire object to a known state, independent of the previous state of -// the object. -// -// The clang-tidy check bugprone-use-after-move recognizes this attribute as a -// marker that a moved-from object has left the indeterminate state and can be -// reused. -#if RCC_HAS_CPP_ATTRIBUTE(clang::reinitializes) -#define RCC_ATTRIBUTE_REINITIALIZES [[clang::reinitializes]] -#else -#define RCC_ATTRIBUTE_REINITIALIZES -#endif - -// Some compilers warn about unused functions. When a function is sometimes -// used or not depending on build settings (e.g. a function only called from -// within "assert"), this attribute can be used to suppress such warnings. -// -// However, it shouldn't be used for unused *variables*, as those have a much -// more portable solution: -// (void)unused_var_name; -// Prefer cast-to-void wherever it is sufficient. -#if __has_attribute(unused) -#define RCC_ATTRIBUTE_UNUSED __attribute__ ((__unused__)) -#else -#define RCC_ATTRIBUTE_UNUSED -#endif - -// FIXME: Provide this for PE/COFF targets. -#if __has_attribute(weak) && !defined(__MINGW32__) && !defined(__CYGWIN__) && \ - !defined(_WIN32) -#define RCC_HAS_ATTRIBUTE_WEAK 1 -#else -#define RCC_HAS_ATTRIBUTE_WEAK 0 -#endif -#if RCC_HAS_ATTRIBUTE_WEAK -#define RCC_ATTRIBUTE_WEAK __attribute__ ((__weak__)) -#else -#define RCC_ATTRIBUTE_WEAK -#endif - -// Prior to clang 3.2, clang did not accept any spelling of -// __has_attribute(const), so assume it is supported. -#if defined(__clang__) || defined(__GNUC__) -// aka 'CONST' but following RCC Conventions. -#define RCC_READNONE __attribute__ ((__const__)) -#else -#define RCC_READNONE -#endif - -#if __has_attribute(pure) || defined(__GNUC__) -// aka 'PURE' but following RCC Conventions. -#define RCC_READONLY __attribute__ ((__pure__)) -#else -#define RCC_READONLY -#endif - -#if __has_attribute(minsize) -#define RCC_ATTRIBUTE_MINSIZE __attribute__ ((minsize)) -#else -#define RCC_ATTRIBUTE_MINSIZE -#endif - -#if __has_builtin(__builtin_expect) || defined(__GNUC__) -#define RCC_LIKELY(EXPR) __builtin_expect ((bool)(EXPR), true) -#define RCC_UNLIKELY(EXPR) __builtin_expect ((bool)(EXPR), false) -#else -#define RCC_LIKELY(EXPR) (EXPR) -#define RCC_UNLIKELY(EXPR) (EXPR) -#endif - -/// RCC_ATTRIBUTE_NOINLINE - On compilers where we have a directive to do so, -/// mark a method "not for inlining". -#if __has_attribute(noinline) -#define RCC_ATTRIBUTE_NOINLINE __attribute__ ((noinline)) -#elif defined(_MSC_VER) -#define RCC_ATTRIBUTE_NOINLINE __declspec (noinline) -#else -#define RCC_ATTRIBUTE_NOINLINE -#endif - -/// RCC_ATTRIBUTE_ALWAYS_INLINE - On compilers where we have a directive to do -/// so, mark a method "always inline" because it is performance sensitive. -#if __has_attribute(always_inline) -#define RCC_ATTRIBUTE_ALWAYS_INLINE inline __attribute__ ((always_inline)) -#elif defined(_MSC_VER) -#define RCC_ATTRIBUTE_ALWAYS_INLINE __forceinline -#else -#define RCC_ATTRIBUTE_ALWAYS_INLINE inline -#endif - -/// RCC_ATTRIBUTE_ALWAYS_INLINE_UNLESS_DEBUG - Like -/// RCC_ATTRIBUTE_ALWAYS_INLINE but disabled in debug builds to avoid stack -/// overflow with deep recursion. -#if defined(NDEBUG) -#define RCC_ATTRIBUTE_ALWAYS_INLINE_UNLESS_DEBUG RCC_ATTRIBUTE_ALWAYS_INLINE -#else -#define RCC_ATTRIBUTE_ALWAYS_INLINE_UNLESS_DEBUG inline -#endif - -/// RCC_ATTRIBUTE_NO_DEBUG - On compilers where we have a directive to do -/// so, mark a method "no debug" because debug info makes the debugger -/// experience worse. -#if __has_attribute(nodebug) -#define RCC_ATTRIBUTE_NODEBUG __attribute__ ((nodebug)) -#else -#define RCC_ATTRIBUTE_NODEBUG -#endif - -#if __has_attribute(returns_nonnull) -#define RCC_ATTRIBUTE_RETURNS_NONNULL __attribute__ ((returns_nonnull)) -#elif defined(_MSC_VER) -#define RCC_ATTRIBUTE_RETURNS_NONNULL _Ret_notnull_ -#else -#define RCC_ATTRIBUTE_RETURNS_NONNULL -#endif - -/// RCC_ATTRIBUTE_RESTRICT - Annotates a pointer to tell the compiler that -/// it is not aliased in the current scope. -#if defined(__clang__) || defined(__GNUC__) || defined(_MSC_VER) -#define RCC_ATTRIBUTE_RESTRICT __restrict -#else -#define RCC_ATTRIBUTE_RESTRICT -#endif - -/// \macro RCC_ATTRIBUTE_RETURNS_NOALIAS Used to mark a function as returning a -/// pointer that does not alias any other valid pointer. -#ifdef __GNUC__ -#define RCC_ATTRIBUTE_RETURNS_NOALIAS __attribute__ ((__malloc__)) -#elif defined(_MSC_VER) -#define RCC_ATTRIBUTE_RETURNS_NOALIAS __declspec (restrict) -#else -#define RCC_ATTRIBUTE_RETURNS_NOALIAS -#endif - -/// RCC_FALLTHROUGH - Mark fallthrough cases in switch statements. -#if defined(__cplusplus) && __cplusplus > 201402L && \ - RCC_HAS_CPP_ATTRIBUTE(fallthrough) -#define RCC_FALLTHROUGH [[fallthrough]] -#elif RCC_HAS_CPP_ATTRIBUTE(gnu::fallthrough) -#define RCC_FALLTHROUGH [[gnu::fallthrough]] -#elif __has_attribute(fallthrough) -#define RCC_FALLTHROUGH __attribute__ ((fallthrough)) -#elif RCC_HAS_CPP_ATTRIBUTE(clang::fallthrough) -#define RCC_FALLTHROUGH [[clang::fallthrough]] -#else -#define RCC_FALLTHROUGH -#endif - -/// RCC_REQUIRE_CONSTANT_INITIALIZATION - Apply this to globals to ensure that -/// they are constant initialized. -#if RCC_HAS_CPP_ATTRIBUTE(clang::require_constant_initialization) -#define RCC_REQUIRE_CONSTANT_INITIALIZATION \ - [[clang::require_constant_initialization]] -#else -#define RCC_REQUIRE_CONSTANT_INITIALIZATION -#endif - -/// RCC_GSL_OWNER - Apply this to owning classes like SmallVector to enable -/// lifetime warnings. -#if RCC_HAS_CPP_ATTRIBUTE(gsl::Owner) -#define RCC_GSL_OWNER [[gsl::Owner]] -#else -#define RCC_GSL_OWNER -#endif - -/// RCC_GSL_POINTER - Apply this to non-owning classes like -/// StringRef to enable lifetime warnings. -#if RCC_HAS_CPP_ATTRIBUTE(gsl::Pointer) -#define RCC_GSL_POINTER [[gsl::Pointer]] -#else -#define RCC_GSL_POINTER -#endif - -#if RCC_HAS_CPP_ATTRIBUTE(clang::lifetimebound) -#define RCC_LIFETIME_BOUND [[clang::lifetimebound]] -#else -#define RCC_LIFETIME_BOUND -#endif - -#if RCC_HAS_CPP_ATTRIBUTE(nodiscard) >= 201907L -#define RCC_CTOR_NODISCARD [[nodiscard]] -#else -#define RCC_CTOR_NODISCARD -#endif - -// Macro to suppress the MSVC warning C4848: -// "support for attribute [[msvc::no_unique_address]] in C++17 and earlier -// is a vendor extension". -// This warning is removed in versions >= 19.43. -#if !defined(_MSC_VER) || _MSC_VER >= 1943 || defined(__clang__) -#define RCC_SUPPRESS_MSVC_ATTR_IS_VENDOR_EXT_PUSH -#define RCC_SUPPRESS_MSVC_ATTR_IS_VENDOR_EXT_POP -#else // MSVC < 19.43 -#define RCC_SUPPRESS_MSVC_ATTR_IS_VENDOR_EXT_PUSH \ - __pragma (warning (push)) __pragma (warning (disable : 4848)) -#define RCC_SUPPRESS_MSVC_ATTR_IS_VENDOR_EXT_POP __pragma (warning (pop)) -#endif - -#if RCC_HAS_CPP_ATTRIBUTE(no_unique_address) -#define RCC_NO_UNIQUE_ADDRESS [[no_unique_address]] -#elif RCC_HAS_CPP_ATTRIBUTE(msvc::no_unique_address) -#define RCC_NO_UNIQUE_ADDRESS \ - RCC_SUPPRESS_MSVC_ATTR_IS_VENDOR_EXT_PUSH \ - [[msvc::no_unique_address]] RCC_SUPPRESS_MSVC_ATTR_IS_VENDOR_EXT_POP -#else -#define RCC_NO_UNIQUE_ADDRESS -#endif - -/// RCC_EXTENSION - Support compilers where we have a keyword to suppress -/// pedantic diagnostics. -#ifdef __GNUC__ -#define RCC_EXTENSION __extension__ -#else -#define RCC_EXTENSION -#endif - -/// RCC_BUILTIN_UNREACHABLE - On compilers which support it, expands -/// to an expression which states that it is undefined behavior for the -/// compiler to reach this point. Otherwise is not defined. -/// -/// '#else' is intentionally left out so that other macro logic (e.g., -/// RCC_ASSUME_ALIGNED and rcc_unreachable()) can detect whether -/// RCC_BUILTIN_UNREACHABLE has a definition. -#if __has_builtin(__builtin_unreachable) || defined(__GNUC__) -#define RCC_BUILTIN_UNREACHABLE __builtin_unreachable () -#elif defined(_MSC_VER) -#define RCC_BUILTIN_UNREACHABLE __assume (false) -#endif - -/// RCC_BUILTIN_TRAP - On compilers which support it, expands to an expression -/// which causes the program to exit abnormally. -#if __has_builtin(__builtin_trap) || defined(__GNUC__) -#define RCC_BUILTIN_TRAP __builtin_trap () -#elif defined(_MSC_VER) -// The __debugbreak intrinsic is supported by MSVC, does not require forward -// declarations involving platform-specific typedefs (unlike RaiseException), -// results in a call to vectored exception handlers, and encodes to a short -// instruction that still causes the trapping behavior we want. -#define RCC_BUILTIN_TRAP __debugbreak () -#else -#define RCC_BUILTIN_TRAP *(volatile int *)0x11 = 0 -#endif - -/// RCC_BUILTIN_DEBUGTRAP - On compilers which support it, expands to -/// an expression which causes the program to break while running -/// under a debugger. -#if __has_builtin(__builtin_debugtrap) -#define RCC_BUILTIN_DEBUGTRAP __builtin_debugtrap () -#elif defined(_MSC_VER) -// The __debugbreak intrinsic is supported by MSVC and breaks while -// running under the debugger, and also supports invoking a debugger -// when the OS is configured appropriately. -#define RCC_BUILTIN_DEBUGTRAP __debugbreak () -#else -// Just continue execution when built with compilers that have no -// support. This is a debugging aid and not intended to force the -// program to abort if encountered. -#define RCC_BUILTIN_DEBUGTRAP -#endif - -/// \macro RCC_ASSUME_ALIGNED -/// Returns a pointer with an assumed alignment. -#if __has_builtin(__builtin_assume_aligned) || defined(__GNUC__) -#define RCC_ASSUME_ALIGNED(p, a) __builtin_assume_aligned (p, a) -#elif defined(RCC_BUILTIN_UNREACHABLE) -#define RCC_ASSUME_ALIGNED(p, a) \ - (((uintptr_t (p) % (a)) == 0) ? (p) : (RCC_BUILTIN_UNREACHABLE, (p))) -#else -#define RCC_ASSUME_ALIGNED(p, a) (p) -#endif - -/// \macro RCC_PACKED -/// Used to specify a packed structure. -/// RCC_PACKED( -/// struct A { -/// int i; -/// int j; -/// int k; -/// long long l; -/// }); -/// -/// RCC_PACKED_START -/// struct B { -/// int i; -/// int j; -/// int k; -/// long long l; -/// }; -/// RCC_PACKED_END -#ifdef _MSC_VER -#define RCC_PACKED(d) __pragma (pack (push, 1)) d __pragma (pack (pop)) -#define RCC_PACKED_START __pragma (pack (push, 1)) -#define RCC_PACKED_END __pragma (pack (pop)) -#else -#define RCC_PACKED(d) d __attribute__ ((packed)) -#define RCC_PACKED_START _Pragma ("pack(push, 1)") -#define RCC_PACKED_END _Pragma ("pack(pop)") -#endif - -/// \macro RCC_MEMORY_SANITIZER_BUILD -/// Whether RCC itself is built with MemorySanitizer instrumentation. -#if __has_feature(memory_sanitizer) -#define RCC_MEMORY_SANITIZER_BUILD 1 -#include <sanitizer/msan_interface.h> -#define RCC_NO_SANITIZE_MEMORY_ATTRIBUTE __attribute__ ((no_sanitize_memory)) -#else -#define RCC_MEMORY_SANITIZER_BUILD 0 -#define __msan_allocated_memory(p, size) -#define __msan_unpoison(p, size) -#define RCC_NO_SANITIZE_MEMORY_ATTRIBUTE -#endif - -/// \macro RCC_ADDRESS_SANITIZER_BUILD -/// Whether RCC itself is built with AddressSanitizer instrumentation. -#if __has_feature(address_sanitizer) || defined(__SANITIZE_ADDRESS__) -#define RCC_ADDRESS_SANITIZER_BUILD 1 -#if __has_include(<sanitizer/asan_interface.h>) -#include <sanitizer/asan_interface.h> -#else -// These declarations exist to support ASan with MSVC. If MSVC eventually ships -// asan_interface.h in their headers, then we can remove this. -#ifdef __cplusplus -extern "C" -{ -#endif - void - __asan_poison_memory_region (void const volatile *addr, size_t size); - void - __asan_unpoison_memory_region (void const volatile *addr, size_t size); -#ifdef __cplusplus -} // extern "C" -#endif -#endif -#else -#define RCC_ADDRESS_SANITIZER_BUILD 0 -#define __asan_poison_memory_region(p, size) -#define __asan_unpoison_memory_region(p, size) -#endif - -/// \macro RCC_HWADDRESS_SANITIZER_BUILD -/// Whether RCC itself is built with HWAddressSanitizer instrumentation. -#if __has_feature(hwaddress_sanitizer) -#define RCC_HWADDRESS_SANITIZER_BUILD 1 -#else -#define RCC_HWADDRESS_SANITIZER_BUILD 0 -#endif - -/// \macro RCC_THREAD_SANITIZER_BUILD -/// Whether RCC itself is built with ThreadSanitizer instrumentation. -#if __has_feature(thread_sanitizer) || defined(__SANITIZE_THREAD__) -#define RCC_THREAD_SANITIZER_BUILD 1 -#else -#define RCC_THREAD_SANITIZER_BUILD 0 -#endif - -#if RCC_THREAD_SANITIZER_BUILD -// Thread Sanitizer is a tool that finds races in code. -// See http://code.google.com/p/data-race-test/wiki/DynamicAnnotations . -// tsan detects these exact functions by name. -#ifdef __cplusplus -extern "C" -{ -#endif - void - AnnotateHappensAfter (const char *file, int line, const volatile void *cv); - void - AnnotateHappensBefore (const char *file, int line, const volatile void *cv); - void - AnnotateIgnoreWritesBegin (const char *file, int line); - void - AnnotateIgnoreWritesEnd (const char *file, int line); -#ifdef __cplusplus -} -#endif - -// This marker is used to define a happens-before arc. The race detector will -// infer an arc from the begin to the end when they share the same pointer -// argument. -#define TsanHappensBefore(cv) AnnotateHappensBefore (__FILE__, __LINE__, cv) - -// This marker defines the destination of a happens-before arc. -#define TsanHappensAfter(cv) AnnotateHappensAfter (__FILE__, __LINE__, cv) - -// Ignore any races on writes between here and the next TsanIgnoreWritesEnd. -#define TsanIgnoreWritesBegin() AnnotateIgnoreWritesBegin (__FILE__, __LINE__) - -// Resume checking for racy writes. -#define TsanIgnoreWritesEnd() AnnotateIgnoreWritesEnd (__FILE__, __LINE__) -#else -#define TsanHappensBefore(cv) -#define TsanHappensAfter(cv) -#define TsanIgnoreWritesBegin() -#define TsanIgnoreWritesEnd() -#endif - -/// \macro RCC_NO_SANITIZE -/// Disable a particular sanitizer for a function. -#if __has_attribute(no_sanitize) -#define RCC_NO_SANITIZE(KIND) __attribute__ ((no_sanitize (KIND))) -#else -#define RCC_NO_SANITIZE(KIND) -#endif - -/// Mark debug helper function definitions like dump() that should not be -/// stripped from debug builds. -/// Note that you should also surround dump() functions with -/// `#if !defined(NDEBUG) || defined(RCC_ENABLE_DUMP)` so they do always -/// get stripped in release builds. -// FIXME: Move this to a private config.h as it's not usable in public headers. -#if !defined(NDEBUG) || defined(RCC_ENABLE_DUMP) -#define RCC_DUMP_METHOD \ - RCC_ATTRIBUTE_NOINLINE RCC_ATTRIBUTE_USED RCC_ATTRIBUTE_RETAIN -#else -#define RCC_DUMP_METHOD RCC_ATTRIBUTE_NOINLINE -#endif - -/// \macro RCC_PRETTY_FUNCTION -/// Gets a user-friendly looking function signature for the current scope -/// using the best available method on each platform. The exact format of the -/// resulting string is implementation specific and non-portable, so this should -/// only be used, for example, for logging or diagnostics. -#if defined(_MSC_VER) -#define RCC_PRETTY_FUNCTION __FUNCSIG__ -#elif defined(__GNUC__) || defined(__clang__) -#define RCC_PRETTY_FUNCTION __PRETTY_FUNCTION__ -#else -#define RCC_PRETTY_FUNCTION __func__ -#endif - -/// \macro RCC_THREAD_LOCAL -/// A thread-local storage specifier which can be used with globals, -/// extern globals, and static globals. -/// -/// This is essentially an extremely restricted analog to C++11's thread_local -/// support. It uses thread_local if available, falling back on gcc __thread -/// if not. __thread doesn't support many of the C++11 thread_local's -/// features. You should only use this for PODs that you can statically -/// initialize to some constant value. In almost all circumstances this is most -/// appropriate for use with a pointer, integer, or small aggregation of -/// pointers and integers. -#if RCC_ENABLE_THREADS -#if __has_feature(cxx_thread_local) || defined(_MSC_VER) -#define RCC_THREAD_LOCAL thread_local -#else -// Clang, GCC, and other compatible compilers used __thread prior to C++11 and -// we only need the restricted functionality that provides. -#define RCC_THREAD_LOCAL __thread -#endif -#else // !RCC_ENABLE_THREADS -// If threading is disabled entirely, this compiles to nothing and you get -// a normal global variable. -#define RCC_THREAD_LOCAL -#endif - -/// \macro RCC_ENABLE_EXCEPTIONS -/// Whether RCC is built with exception support. -#if __has_feature(cxx_exceptions) -#define RCC_ENABLE_EXCEPTIONS 1 -#elif defined(__GNUC__) && defined(__EXCEPTIONS) -#define RCC_ENABLE_EXCEPTIONS 1 -#elif defined(_MSC_VER) && defined(_CPPUNWIND) -#define RCC_ENABLE_EXCEPTIONS 1 -#endif - -/// \macro RCC_NO_PROFILE_INSTRUMENT_FUNCTION -/// Disable the profile instrument for a function. -#if __has_attribute(no_profile_instrument_function) -#define RCC_NO_PROFILE_INSTRUMENT_FUNCTION \ - __attribute__ ((no_profile_instrument_function)) -#else -#define RCC_NO_PROFILE_INSTRUMENT_FUNCTION -#endif - -/// \macro RCC_PREFERRED_TYPE -/// Adjust type of bit-field in debug info. -#if __has_attribute(preferred_type) -#define RCC_PREFERRED_TYPE(T) __attribute__ ((preferred_type (T))) -#else -#define RCC_PREFERRED_TYPE(T) -#endif - -#if RCC_HAS_CPP_ATTRIBUTE(clang::ptrauth_vtable_pointer) && \ - (defined(__PTRAUTH__) || __has_feature(ptrauth_calls)) -#define RCC_MOVABLE_POLYMORPHIC_TYPE \ - [[clang::ptrauth_vtable_pointer (default_key, no_address_discrimination, \ - default_extra_discrimination)]] -#else -#define RCC_MOVABLE_POLYMORPHIC_TYPE -#endif - -/// \macro RCC_VIRTUAL_ANCHOR_FUNCTION -/// This macro is used to adhere to RCC's policy that each class with a vtable -/// must have at least one out-of-line virtual function. This macro allows us -/// to declare such a function in `final` classes without triggering a warning. -// clang-format off -// Autoformatting makes this look awful. -#if defined(__clang__) - // Make sure this is only parsed if __clang__ is defined - #if __has_warning("-Wunnecessary-virtual-specifier") - #define RCC_DECLARE_VIRTUAL_ANCHOR_FUNCTION() \ - _Pragma("clang diagnostic push") \ - _Pragma("clang diagnostic ignored \"-Wunnecessary-virtual-specifier\"") \ - virtual void anchor() \ - _Pragma("clang diagnostic pop") - #else // __has_warning - #define RCC_DECLARE_VIRTUAL_ANCHOR_FUNCTION() \ - virtual void anchor() - #endif -#else // defined(__clang__) - #define RCC_DECLARE_VIRTUAL_ANCHOR_FUNCTION() \ - virtual void anchor() -#endif -// clang-format on - -/// \macro RCC_IS_X86 -/// Whether the target architecture is x86 / x86-64. -#if defined(__x86_64__) || defined(__i386__) -#define RCC_IS_X86 1 -#else -#define RCC_IS_X86 0 -#endif - -/// \macro RCC_TARGET_SSE42 -/// Function attribute to compile a function with SSE4.2 enabled. -#if defined(__has_attribute) && __has_attribute(target) -#define RCC_TARGET_SSE42 __attribute__ ((target ("sse4.2"))) -#else -#define RCC_TARGET_SSE42 -#endif - -#if __has_builtin(__builtin_cpu_supports) && \ - (defined(__linux__) || defined(__APPLE__)) -#define RCC_CPU_SUPPORTS(feature) __builtin_cpu_supports (feature) -#else -#define RCC_CPU_SUPPORTS(feature) 0 -#endif - -/// \macro RCC_CPU_SUPPORTS_SSE42 -/// Expands to true if the runtime cpu supports SSE4.2, or if compiled with -/// SSE4.2 enabled. -#if defined(__SSE4_2__) -#define RCC_CPU_SUPPORTS_SSE42 1 -#else -#define RCC_CPU_SUPPORTS_SSE42 RCC_CPU_SUPPORTS ("sse4.2") -#endif - -#endif diff --git a/rcc/include/rcc/Support/Errno.h b/rcc/include/rcc/Support/Errno.h deleted file mode 100644 index 21d8d78..0000000 --- a/rcc/include/rcc/Support/Errno.h +++ /dev/null @@ -1,64 +0,0 @@ -/* - RCC-Project - - Copyright (C) 2026 Richard Qin - - This file is part of RCC-Project. - - RCC-Project is free software; you can redistribute it and/or modify it under - the terms of the GNU General Public License as published by the Free - Software Foundation; either version 3 of the License, or (at your option) any - later version. - - RCC-Project is distributed in the hope that it will be useful, but WITHOUT ANY - WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR - A PARTICULAR PURPOSE. See the GNU General Public License for more details. - - You should have received a copy of the GNU General Public License along with - RCC-Project; see the file COPYING. If not see - <http://www.gnu.org/licenses/>. -*/ - -// This implementation is based on llvm/include/llvm/Support/Errno.h. - -#ifndef RCC_SUPPORT_ERRNO_H -#define RCC_SUPPORT_ERRNO_H - -#include "rcc/Support/Compiler.h" - -#include <cerrno> -#include <string> - -namespace rcc -{ -namespace sys -{ - -/// Returns a string representation of the errno value, using whatever -/// thread-safe variant of strerror() is available. Be sure to call this -/// immediately after the function that set errno, or errno may have been -/// overwritten by an intervening call. -RCC_ABI std::string -StrError (); - -/// Like the no-argument version above, but uses \p errnum instead of errno. -RCC_ABI std::string -StrError (int errnum); - -template <typename FailT, typename Fun, typename... Args> -inline decltype (auto) -RetryAfterSignal (const FailT &Fail, const Fun &F, const Args &...As) -{ - decltype (F (As...)) Res; - do - { - errno = 0; - Res = F (As...); - } while (Res == Fail && errno == EINTR); - return Res; -} - -} // namespace sys -} // namespace rcc - -#endif // RCC_SUPPORT_ERRNO_H diff --git a/rcc/include/rcc/Support/ErrorOr.h b/rcc/include/rcc/Support/ErrorOr.h deleted file mode 100644 index 0e17822..0000000 --- a/rcc/include/rcc/Support/ErrorOr.h +++ /dev/null @@ -1,378 +0,0 @@ -/* - RCC-Project - - Copyright (C) 2026 Richard Qin - - This file is part of RCC-Project. - - RCC-Project is free software; you can redistribute it and/or modify it under - the terms of the GNU General Public License as published by the Free - Software Foundation; either version 3 of the License, or (at your option) any - later version. - - RCC-Project is distributed in the hope that it will be useful, but WITHOUT ANY - WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR - A PARTICULAR PURPOSE. See the GNU General Public License for more details. - - You should have received a copy of the GNU General Public License along with - RCC-Project; see the file COPYING. If not see - <http://www.gnu.org/licenses/>. -*/ - -//===- llvm/Support/ErrorOr.h - Error Smart Pointer -------------*- C++ -*-===// -// -// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. -// See https://llvm.org/LICENSE.txt for license information. -// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception -// -//===----------------------------------------------------------------------===// -/// -/// \file -/// -/// Provides ErrorOr<T> smart pointer. -/// -//===----------------------------------------------------------------------===// - -#ifndef RCC_SUPPORT_ERROROR_H -#define RCC_SUPPORT_ERROROR_H - -#include <cassert> -#include <functional> // for std::reference_wrapper -#include <system_error> -#include <type_traits> -#include <utility> - -namespace rcc -{ - -/// Represents either an error or a value T. -/// -/// ErrorOr<T> is a pointer-like class that represents the result of an -/// operation. The result is either an error, or a value of type T. This is -/// designed to emulate the usage of returning a pointer where nullptr indicates -/// failure. However instead of just knowing that the operation failed, we also -/// have an error_code that describes why it failed. -/// -/// It is used like the following. -/// \code -/// ErrorOr<Buffer> getBuffer(); -/// -/// auto buffer = getBuffer(); -/// if (error_code ec = buffer.getError()) -/// return ec; -/// buffer->write("adena"); -/// \endcode -/// -/// -/// Implicit conversion to bool returns true if there is a usable value. The -/// unary * and -> operators provide pointer like access to the value. Accessing -/// the value when there is an error has undefined behavior. -/// -/// When T is a reference type the behavior is slightly different. The reference -/// is held in a std::reference_wrapper<std::remove_reference<T>::type>, and -/// there is special handling to make operator -> work as if T was not a -/// reference. -/// -/// T cannot be a rvalue reference. -template <class T> class ErrorOr -{ - template <class OtherT> friend class ErrorOr; - - static constexpr bool isRef = std::is_reference_v<T>; - - using wrap = std::reference_wrapper<std::remove_reference_t<T>>; - -public: - using storage_type = std::conditional_t<isRef, wrap, T>; - -private: - using reference = std::remove_reference_t<T> &; - using const_reference = const std::remove_reference_t<T> &; - using pointer = std::remove_reference_t<T> *; - using const_pointer = const std::remove_reference_t<T> *; - -public: - template <class E> - ErrorOr (E ErrorCode, - std::enable_if_t<std::is_error_code_enum<E>::value || - std::is_error_condition_enum<E>::value, - void *> = nullptr) - : HasError (true) - { - new (getErrorStorage ()) std::error_code (make_error_code (ErrorCode)); - } - - ErrorOr (std::error_code EC) : HasError (true) - { - new (getErrorStorage ()) std::error_code (EC); - } - - template <class OtherT> - ErrorOr (OtherT &&Val, - std::enable_if_t<std::is_convertible_v<OtherT, T>> * = nullptr) - : HasError (false) - { - new (getStorage ()) storage_type (std::forward<OtherT> (Val)); - } - - ErrorOr (const ErrorOr &Other) - { - copyConstruct (Other); - } - - template <class OtherT> - ErrorOr (const ErrorOr<OtherT> &Other, - std::enable_if_t<std::is_convertible_v<OtherT, T>> * = nullptr) - { - copyConstruct (Other); - } - - template <class OtherT> - explicit ErrorOr ( - const ErrorOr<OtherT> &Other, - std::enable_if_t<!std::is_convertible_v<OtherT, const T &>> * = nullptr) - { - copyConstruct (Other); - } - - ErrorOr (ErrorOr &&Other) - { - moveConstruct (std::move (Other)); - } - - template <class OtherT> - ErrorOr (ErrorOr<OtherT> &&Other, - std::enable_if_t<std::is_convertible_v<OtherT, T>> * = nullptr) - { - moveConstruct (std::move (Other)); - } - - // This might eventually need SFINAE but it's more complex than is_convertible - // & I'm too lazy to write it right now. - template <class OtherT> - explicit ErrorOr ( - ErrorOr<OtherT> &&Other, - std::enable_if_t<!std::is_convertible_v<OtherT, T>> * = nullptr) - { - moveConstruct (std::move (Other)); - } - - ErrorOr & - operator= (const ErrorOr &Other) - { - copyAssign (Other); - return *this; - } - - ErrorOr & - operator= (ErrorOr &&Other) - { - moveAssign (std::move (Other)); - return *this; - } - - ~ErrorOr () - { - if (!HasError) - { - getStorage ()->~storage_type (); - } - } - - /// Return false if there is an error. - explicit - operator bool () const - { - return !HasError; - } - - reference - get () - { - return *getStorage (); - } - const_reference - get () const - { - return const_cast<ErrorOr<T> *> (this)->get (); - } - - std::error_code - getError () const - { - return HasError ? *getErrorStorage () : std::error_code (); - } - - pointer - operator->() - { - return toPointer (getStorage ()); - } - - const_pointer - operator->() const - { - return toPointer (getStorage ()); - } - - reference - operator* () - { - return *getStorage (); - } - - const_reference - operator* () const - { - return *getStorage (); - } - -private: - template <class OtherT> - void - copyConstruct (const ErrorOr<OtherT> &Other) - { - if (!Other.HasError) - { - // Get the other value. - HasError = false; - new (getStorage ()) storage_type (*Other.getStorage ()); - } - else - { - // Get other's error. - HasError = true; - new (getErrorStorage ()) std::error_code (Other.getError ()); - } - } - - template <class T1> - static bool - compareThisIfSameType (const T1 &a, const T1 &b) - { - return &a == &b; - } - - template <class T1, class T2> - static bool - compareThisIfSameType (const T1 &, const T2 &) - { - return false; - } - - template <class OtherT> - void - copyAssign (const ErrorOr<OtherT> &Other) - { - if (compareThisIfSameType (*this, Other)) - { - return; - } - - this->~ErrorOr (); - new (this) ErrorOr (Other); - } - - template <class OtherT> - void - moveConstruct (ErrorOr<OtherT> &&Other) - { - if (!Other.HasError) - { - // Get the other value. - HasError = false; - new (getStorage ()) storage_type (std::move (*Other.getStorage ())); - } - else - { - // Get other's error. - HasError = true; - new (getErrorStorage ()) std::error_code (Other.getError ()); - } - } - - template <class OtherT> - void - moveAssign (ErrorOr<OtherT> &&Other) - { - if (compareThisIfSameType (*this, Other)) - { - return; - } - - this->~ErrorOr (); - new (this) ErrorOr (std::move (Other)); - } - - pointer - toPointer (pointer Val) - { - return Val; - } - - const_pointer - toPointer (const_pointer Val) const - { - return Val; - } - - pointer - toPointer (wrap *Val) - { - return &Val->get (); - } - - const_pointer - toPointer (const wrap *Val) const - { - return &Val->get (); - } - - storage_type * - getStorage () - { - assert (!HasError && "Cannot get value when an error exists!"); - return &TStorage; - } - - const storage_type * - getStorage () const - { - assert (!HasError && "Cannot get value when an error exists!"); - return &TStorage; - } - - std::error_code * - getErrorStorage () - { - assert (HasError && "Cannot get error when a value exists!"); - return &ErrorStorage; - } - - const std::error_code * - getErrorStorage () const - { - assert (HasError && "Cannot get error when a value exists!"); - return &ErrorStorage; - } - - union - { - storage_type TStorage; - std::error_code ErrorStorage; - }; - bool HasError : 1; -}; - -template <class T, class E> -std::enable_if_t<std::is_error_code_enum<E>::value || - std::is_error_condition_enum<E>::value, - bool> -operator== (const ErrorOr<T> &Err, E Code) -{ - return Err.getError () == Code; -} - -} // end namespace rcc - -#endif // RCC_SUPPORT_ERROROR_H diff --git a/rcc/include/rcc/Support/MathExtras.h b/rcc/include/rcc/Support/MathExtras.h deleted file mode 100644 index 6ea2a1f..0000000 --- a/rcc/include/rcc/Support/MathExtras.h +++ /dev/null @@ -1,1050 +0,0 @@ -/* - RCC-Project - - Copyright (C) 2026 Richard Qin - - This file is part of RCC-Project. - - RCC-Project is free software; you can redistribute it and/or modify it under - the terms of the GNU General Public License as published by the Free - Software Foundation; either version 3 of the License, or (at your option) any - later version. - - RCC-Project is distributed in the hope that it will be useful, but WITHOUT ANY - WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR - A PARTICULAR PURPOSE. See the GNU General Public License for more details. - - You should have received a copy of the GNU General Public License along with - RCC-Project; see the file COPYING. If not see - <http://www.gnu.org/licenses/>. -*/ - -//===-- llvm/Support/MathExtras.h - Useful math functions -------*- C++ -*-===// -// -// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. -// See https://llvm.org/LICENSE.txt for license information. -// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception -// -//===----------------------------------------------------------------------===// -// -// This file contains some functions that are useful for math stuff. -// -//===----------------------------------------------------------------------===// - -#ifndef RCC_SUPPORT_MATHEXTRAS_H -#define RCC_SUPPORT_MATHEXTRAS_H - -#include "rcc/Support/Compiler.h" -#include <bit> -#include <cassert> -#include <climits> -#include <cstdint> -#include <cstring> -#include <limits> -#include <numbers> -#include <type_traits> -#include <utility> - -namespace rcc -{ -/// Some template parameter helpers to optimize for bitwidth, for functions that -/// take multiple arguments. - -// We can't verify signedness, since callers rely on implicit coercions to -// signed/unsigned. -template <typename T, typename U> -using enableif_int = - std::enable_if_t<std::is_integral_v<T> && std::is_integral_v<U>>; - -// Use std::common_type_t to widen only up to the widest argument. -template <typename T, typename U, typename = enableif_int<T, U>> -using common_uint = - std::common_type_t<std::make_unsigned_t<T>, std::make_unsigned_t<U>>; -template <typename T, typename U, typename = enableif_int<T, U>> -using common_sint = - std::common_type_t<std::make_signed_t<T>, std::make_signed_t<U>>; - -/// Mathematical constants. -namespace numbers -{ -// clang-format off -inline constexpr float ef = std::numbers::e_v<float>; -inline constexpr float egammaf = std::numbers::egamma_v<float>; -inline constexpr float ln2f = std::numbers::ln2_v<float>; -inline constexpr float ln10f = std::numbers::ln10_v<float>; -inline constexpr float log2ef = std::numbers::log2e_v<float>; -inline constexpr float log10ef = std::numbers::log10e_v<float>; -inline constexpr float pif = std::numbers::pi_v<float>; -inline constexpr float inv_pif = std::numbers::inv_pi_v<float>; -inline constexpr float inv_sqrtpif = std::numbers::inv_sqrtpi_v<float>; -inline constexpr float sqrt2f = std::numbers::sqrt2_v<float>; -inline constexpr float inv_sqrt2f = 1.0f / std::numbers::sqrt2_v<float>; -inline constexpr float sqrt3f = std::numbers::sqrt3_v<float>; -inline constexpr float inv_sqrt3f = std::numbers::inv_sqrt3_v<float>; -inline constexpr float phif = std::numbers::phi_v<float>; - -// sqrtpi is not in C++20 std::numbers. -template <typename T, typename = std::enable_if_t<std::is_floating_point_v<T>>> -inline constexpr T sqrtpi_v = T(0x1.c5bf891b4ef6bP+0); // (1.7724538509055160273) https://oeis.org/A002161 -inline constexpr double sqrtpi = sqrtpi_v<double>; -inline constexpr float sqrtpif = sqrtpi_v<float>; - -// These string literals are taken from below: -// https://github.com/bminor/glibc/blob/8543577b04ded6d979ffcc5a818930e4d74d0645/math/math.h#L1215-L1229 -constexpr const char *pis = "3.141592653589793238462643383279502884", - *inv_pis = "0.318309886183790671537767526745028724"; -// clang-format on -} // namespace numbers - -/// Create a bitmask with the N right-most bits set to 1, and all other -/// bits set to 0. Only unsigned types are allowed. -template <typename T> -constexpr T -maskTrailingOnes (unsigned N) -{ - static_assert (std::is_unsigned_v<T>, "Invalid type!"); - const unsigned Bits = CHAR_BIT * sizeof (T); - assert (N <= Bits && "Invalid bit index"); - if (N == 0) - { - return 0; - } - return T (-1) >> (Bits - N); -} - -/// Create a bitmask with the N left-most bits set to 1, and all other -/// bits set to 0. Only unsigned types are allowed. -template <typename T> -constexpr T -maskLeadingOnes (unsigned N) -{ - return ~maskTrailingOnes<T> (CHAR_BIT * sizeof (T) - N); -} - -/// Create a bitmask with the N right-most bits set to 0, and all other -/// bits set to 1. Only unsigned types are allowed. -template <typename T> -constexpr T -maskTrailingZeros (unsigned N) -{ - return maskLeadingOnes<T> (CHAR_BIT * sizeof (T) - N); -} - -/// Create a bitmask with the N left-most bits set to 0, and all other -/// bits set to 1. Only unsigned types are allowed. -template <typename T> -constexpr T -maskLeadingZeros (unsigned N) -{ - return maskTrailingOnes<T> (CHAR_BIT * sizeof (T) - N); -} - -/// Macro compressed bit reversal table for 256 bits. -/// -/// http://graphics.stanford.edu/~seander/bithacks.html#BitReverseTable -static const unsigned char BitReverseTable256[256] = { -#define R2(n) n, n + 2 * 64, n + 1 * 64, n + 3 * 64 -#define R4(n) R2 (n), R2 (n + 2 * 16), R2 (n + 1 * 16), R2 (n + 3 * 16) -#define R6(n) R4 (n), R4 (n + 2 * 4), R4 (n + 1 * 4), R4 (n + 3 * 4) - R6 (0), R6 (2), R6 (1), R6 (3) -#undef R2 -#undef R4 -#undef R6 -}; - -/// Reverse the bits in \p Val. -template <typename T> -constexpr T -reverseBits (T Val) -{ -#if __has_builtin(__builtin_bitreverse8) - if constexpr (std::is_same_v<T, uint8_t>) - { - return __builtin_bitreverse8 (Val); - } -#endif -#if __has_builtin(__builtin_bitreverse16) - if constexpr (std::is_same_v<T, uint16_t>) - { - return __builtin_bitreverse16 (Val); - } -#endif -#if __has_builtin(__builtin_bitreverse32) - if constexpr (std::is_same_v<T, uint32_t>) - { - return __builtin_bitreverse32 (Val); - } -#endif -#if __has_builtin(__builtin_bitreverse64) - if constexpr (std::is_same_v<T, uint64_t>) - { - return __builtin_bitreverse64 (Val); - } -#endif - - unsigned char in[sizeof (Val)]; - unsigned char out[sizeof (Val)]; - std::memcpy (in, &Val, sizeof (Val)); - for (unsigned i = 0; i < sizeof (Val); ++i) - { - out[(sizeof (Val) - i) - 1] = BitReverseTable256[in[i]]; - } - std::memcpy (&Val, out, sizeof (Val)); - return Val; -} - -// NOTE: The following support functions use the _32/_64 extensions instead of -// type overloading so that signed and unsigned integers can be used without -// ambiguity. - -/// Return the high 32 bits of a 64 bit value. -constexpr uint32_t -Hi_32 (uint64_t Value) -{ - return static_cast<uint32_t> (Value >> 32); -} - -/// Return the low 32 bits of a 64 bit value. -constexpr uint32_t -Lo_32 (uint64_t Value) -{ - return static_cast<uint32_t> (Value); -} - -/// Make a 64-bit integer from a high / low pair of 32-bit integers. -constexpr uint64_t -Make_64 (uint32_t High, uint32_t Low) -{ - return ((uint64_t)High << 32) | (uint64_t)Low; -} - -/// Checks if an integer fits into the given bit width. -template <unsigned N> -constexpr bool -isInt (int64_t x) -{ - if constexpr (N == 0) - { - return 0 == x; - } - if constexpr (N == 8) - { - return static_cast<int8_t> (x) == x; - } - if constexpr (N == 16) - { - return static_cast<int16_t> (x) == x; - } - if constexpr (N == 32) - { - return static_cast<int32_t> (x) == x; - } - if constexpr (N < 64) - { - return -(INT64_C (1) << (N - 1)) <= x && x < (INT64_C (1) << (N - 1)); - } - (void)x; // MSVC v19.25 warns that x is unused. - return true; -} - -/// Checks if a signed integer is an N bit number shifted left by S. -template <unsigned N, unsigned S> -constexpr bool -isShiftedInt (int64_t x) -{ - static_assert (S < 64, "isShiftedInt<N, S> with S >= 64 is too much."); - static_assert (N + S <= 64, - "isShiftedInt<N, S> with N + S > 64 is too wide."); - return isInt<N + S> (x) && (x % (UINT64_C (1) << S) == 0); -} - -/// Checks if an unsigned integer fits into the given bit width. -template <unsigned N> -constexpr bool -isUInt (uint64_t x) -{ - if constexpr (N < 64) - { - return (x >> N) == 0; - } - (void)x; // MSVC v19.25 warns that x is unused. - return true; -} - -/// Checks if a unsigned integer is an N bit number shifted left by S. -template <unsigned N, unsigned S> -constexpr bool -isShiftedUInt (uint64_t x) -{ - static_assert (S < 64, "isShiftedUInt<N, S> with S >= 64 is too much."); - static_assert (N + S <= 64, - "isShiftedUInt<N, S> with N + S > 64 is too wide."); - // S must be strictly less than 64. So 1 << S is not undefined behavior. - return isUInt<N + S> (x) && (x % (UINT64_C (1) << S) == 0); -} - -/// Gets the maximum value for a N-bit unsigned integer. -inline constexpr uint64_t -maxUIntN (uint64_t N) -{ - assert (N <= 64 && "integer width out of range"); - - // uint64_t(1) << 64 is undefined behavior, so we can't do - // (uint64_t(1) << N) - 1 - // without checking first that N != 64. But this works and doesn't have a - // branch for N != 0. - // Unfortunately, shifting a uint64_t right by 64 bit is undefined - // behavior, so the condition on N == 0 is necessary. Fortunately, most - // optimizers do not emit branches for this check. - if (N == 0) - { - return 0; - } - return UINT64_MAX >> (64 - N); -} - -/// Gets the minimum value for a N-bit signed integer. -inline constexpr int64_t -minIntN (int64_t N) -{ - assert (N <= 64 && "integer width out of range"); - - if (N == 0) - { - return 0; - } - return UINT64_MAX << (N - 1); -} - -/// Gets the maximum value for a N-bit signed integer. -inline constexpr int64_t -maxIntN (int64_t N) -{ - assert (N <= 64 && "integer width out of range"); - - // This relies on two's complement wraparound when N == 64, so we convert to - // int64_t only at the very end to avoid UB. - if (N == 0) - { - return 0; - } - return (UINT64_C (1) << (N - 1)) - 1; -} - -/// Checks if an unsigned integer fits into the given (dynamic) bit width. -inline constexpr bool -isUIntN (unsigned N, uint64_t x) -{ - return N >= 64 || (x >> N) == 0; -} - -/// Checks if an signed integer fits into the given (dynamic) bit width. -inline constexpr bool -isIntN (unsigned N, int64_t x) -{ - return N >= 64 || (minIntN (N) <= x && x <= maxIntN (N)); -} - -/// Return true if the argument is a non-empty sequence of ones starting at the -/// least significant bit with the remainder zero (32 bit version). -/// Ex. isMask_32(0x0000FFFFU) == true. -constexpr bool -isMask_32 (uint32_t Value) -{ - return Value && ((Value + 1) & Value) == 0; -} - -/// Return true if the argument is a non-empty sequence of ones starting at the -/// least significant bit with the remainder zero (64 bit version). -constexpr bool -isMask_64 (uint64_t Value) -{ - return Value && ((Value + 1) & Value) == 0; -} - -/// Return true if the argument contains a non-empty sequence of ones with the -/// remainder zero (32 bit version.) Ex. isShiftedMask_32(0x0000FF00U) == true. -constexpr bool -isShiftedMask_32 (uint32_t Value) -{ - return Value && isMask_32 ((Value - 1) | Value); -} - -/// Return true if the argument contains a non-empty sequence of ones with the -/// remainder zero (64 bit version.) -constexpr bool -isShiftedMask_64 (uint64_t Value) -{ - return Value && isMask_64 ((Value - 1) | Value); -} - -/// Return true if the argument is a power of two > 0. -/// Ex. isPowerOf2_32(0x00100000U) == true (32 bit edition.) -constexpr bool -isPowerOf2_32 (uint32_t Value) -{ - return std::has_single_bit (Value); -} - -/// Return true if the argument is a power of two > 0 (64 bit edition.) -constexpr bool -isPowerOf2_64 (uint64_t Value) -{ - return std::has_single_bit (Value); -} - -/// Return true if the argument contains a non-empty sequence of ones with the -/// remainder zero (32 bit version.) Ex. isShiftedMask_32(0x0000FF00U) == true. -/// If true, \p MaskIdx will specify the index of the lowest set bit and \p -/// MaskLen is updated to specify the length of the mask, else neither are -/// updated. -inline bool -isShiftedMask_32 (uint32_t Value, unsigned &MaskIdx, unsigned &MaskLen) -{ - if (!isShiftedMask_32 (Value)) - { - return false; - } - MaskIdx = std::countr_zero (Value); - MaskLen = std::popcount (Value); - return true; -} - -/// Return true if the argument contains a non-empty sequence of ones with the -/// remainder zero (64 bit version.) If true, \p MaskIdx will specify the index -/// of the lowest set bit and \p MaskLen is updated to specify the length of the -/// mask, else neither are updated. -inline bool -isShiftedMask_64 (uint64_t Value, unsigned &MaskIdx, unsigned &MaskLen) -{ - if (!isShiftedMask_64 (Value)) - { - return false; - } - MaskIdx = std::countr_zero (Value); - MaskLen = std::popcount (Value); - return true; -} - -/// Compile time Log2. -/// Valid only for positive powers of two. -template <size_t kValue> -constexpr size_t -ConstantLog2 () -{ - static_assert (rcc::isPowerOf2_64 (kValue), - "Value is not a valid power of 2"); - return std::countr_zero (kValue); -} - -/// Return the floor log base 2 of the specified value, -1 if the value is zero. -/// (32 bit edition.) -/// Ex. Log2_32(32) == 5, Log2_32(1) == 0, Log2_32(0) == -1, Log2_32(6) == 2 -inline unsigned -Log2_32 (uint32_t Value) -{ - return 31 - std::countl_zero (Value); -} - -/// Return the floor log base 2 of the specified value, -1 if the value is zero. -/// (64 bit edition.) -inline unsigned -Log2_64 (uint64_t Value) -{ - return 63 - std::countl_zero (Value); -} - -/// Return the ceil log base 2 of the specified value, 32 if the value is zero. -/// (32 bit edition). -/// Ex. Log2_32_Ceil(32) == 5, Log2_32_Ceil(1) == 0, Log2_32_Ceil(6) == 3 -inline unsigned -Log2_32_Ceil (uint32_t Value) -{ - return 32 - std::countl_zero (Value - 1); -} - -/// Return the ceil log base 2 of the specified value, 64 if the value is zero. -/// (64 bit edition.) -inline unsigned -Log2_64_Ceil (uint64_t Value) -{ - return 64 - std::countl_zero (Value - 1); -} - -/// A and B are either alignments or offsets. Return the minimum alignment that -/// may be assumed after adding the two together. -template <typename U, typename V, typename T = common_uint<U, V>> -constexpr T -MinAlign (U A, V B) -{ - // The largest power of 2 that divides both A and B. - // - // Replace "-Value" by "1+~Value" in the following commented code to avoid - // MSVC warning C4146 - // return (A | B) & -(A | B); - return (A | B) & (1 + ~(A | B)); -} - -/// Fallback when arguments aren't integral. -constexpr uint64_t -MinAlign (uint64_t A, uint64_t B) -{ - return (A | B) & (1 + ~(A | B)); -} - -/// Returns the next power of two (in 64-bits) that is strictly greater than A. -/// Returns zero on overflow. -constexpr uint64_t -NextPowerOf2 (uint64_t A) -{ - A |= (A >> 1); - A |= (A >> 2); - A |= (A >> 4); - A |= (A >> 8); - A |= (A >> 16); - A |= (A >> 32); - return A + 1; -} - -/// Returns the power of two which is greater than or equal to the given value. -/// Essentially, it is a ceil operation across the domain of powers of two. -inline uint64_t -PowerOf2Ceil (uint64_t A) -{ - if (!A || A > UINT64_MAX / 2) - { - return 0; - } - return UINT64_C (1) << Log2_64_Ceil (A); -} - -/// Returns the integer ceil(Numerator / Denominator). Unsigned version. -/// Guaranteed to never overflow. -template <typename U, typename V, typename T = common_uint<U, V>> -constexpr T -divideCeil (U Numerator, V Denominator) -{ - assert (Denominator && "Division by zero"); - T Bias = (Numerator != 0); - return (Numerator - Bias) / Denominator + Bias; -} - -/// Fallback when arguments aren't integral. -constexpr uint64_t -divideCeil (uint64_t Numerator, uint64_t Denominator) -{ - assert (Denominator && "Division by zero"); - uint64_t Bias = (Numerator != 0); - return (Numerator - Bias) / Denominator + Bias; -} - -// Check whether divideCeilSigned or divideFloorSigned would overflow. This -// happens only when Numerator = INT_MIN and Denominator = -1. -template <typename U, typename V> -constexpr bool -divideSignedWouldOverflow (U Numerator, V Denominator) -{ - return Numerator == std::numeric_limits<U>::min () && Denominator == -1; -} - -/// Returns the integer ceil(Numerator / Denominator). Signed version. -/// Overflow is explicitly forbidden with an assert. -template <typename U, typename V, typename T = common_sint<U, V>> -constexpr T -divideCeilSigned (U Numerator, V Denominator) -{ - assert (Denominator && "Division by zero"); - assert (!divideSignedWouldOverflow (Numerator, Denominator) && - "Divide would overflow"); - if (!Numerator) - { - return 0; - } - // C's integer division rounds towards 0. - T Bias = Denominator >= 0 ? 1 : -1; - bool SameSign = (Numerator >= 0) == (Denominator >= 0); - return SameSign ? (Numerator - Bias) / Denominator + 1 - : Numerator / Denominator; -} - -/// Returns the integer floor(Numerator / Denominator). Signed version. -/// Overflow is explicitly forbidden with an assert. -template <typename U, typename V, typename T = common_sint<U, V>> -constexpr T -divideFloorSigned (U Numerator, V Denominator) -{ - assert (Denominator && "Division by zero"); - assert (!divideSignedWouldOverflow (Numerator, Denominator) && - "Divide would overflow"); - if (!Numerator) - { - return 0; - } - // C's integer division rounds towards 0. - T Bias = Denominator >= 0 ? -1 : 1; - bool SameSign = (Numerator >= 0) == (Denominator >= 0); - return SameSign ? Numerator / Denominator - : (Numerator - Bias) / Denominator - 1; -} - -/// Returns the remainder of the Euclidean division of LHS by RHS. Result is -/// always non-negative. -template <typename U, typename V, typename T = common_sint<U, V>> -constexpr T -mod (U Numerator, V Denominator) -{ - assert (Denominator >= 1 && "Mod by non-positive number"); - T Mod = Numerator % Denominator; - return Mod < 0 ? Mod + Denominator : Mod; -} - -/// Returns (Numerator / Denominator) rounded by round-half-up. Guaranteed to -/// never overflow. -template <typename U, typename V, typename T = common_uint<U, V>> -constexpr T -divideNearest (U Numerator, V Denominator) -{ - assert (Denominator && "Division by zero"); - T Mod = Numerator % Denominator; - return (Numerator / Denominator) + - (Mod > (static_cast<T> (Denominator) - 1) / 2); -} - -/// Returns the next integer (mod 2**nbits) that is greater than or equal to -/// \p Value and is a multiple of \p Align. \p Align must be non-zero. -/// -/// Examples: -/// \code -/// alignTo(5, 8) = 8 -/// alignTo(17, 8) = 24 -/// alignTo(~0LL, 8) = 0 -/// alignTo(321, 255) = 510 -/// \endcode -/// -/// Will overflow only if result is not representable in T. -template <typename U, typename V, typename T = common_uint<U, V>> -constexpr T -alignTo (U Value, V Align) -{ - assert (Align != 0u && "Align can't be 0."); - T CeilDiv = divideCeil (Value, Align); - return CeilDiv * Align; -} - -/// Fallback when arguments aren't integral. -constexpr uint64_t -alignTo (uint64_t Value, uint64_t Align) -{ - assert (Align != 0u && "Align can't be 0."); - uint64_t CeilDiv = divideCeil (Value, Align); - return CeilDiv * Align; -} - -/// Will overflow only if result is not representable in T. -template <typename U, typename V, typename T = common_uint<U, V>> -constexpr T -alignToPowerOf2 (U Value, V Align) -{ - assert (Align != 0 && (Align & (Align - 1)) == 0 && - "Align must be a power of 2"); - T NegAlign = static_cast<T> (0) - Align; - return (Value + (Align - 1)) & NegAlign; -} - -/// Fallback when arguments aren't integral. -constexpr uint64_t -alignToPowerOf2 (uint64_t Value, uint64_t Align) -{ - assert (Align != 0 && (Align & (Align - 1)) == 0 && - "Align must be a power of 2"); - uint64_t NegAlign = 0 - Align; - return (Value + (Align - 1)) & NegAlign; -} - -/// If non-zero \p Skew is specified, the return value will be a minimal integer -/// that is greater than or equal to \p Size and equal to \p A * N + \p Skew for -/// some integer N. If \p Skew is larger than \p A, its value is adjusted to '\p -/// Skew mod \p A'. \p Align must be non-zero. -/// -/// Examples: -/// \code -/// alignTo(5, 8, 7) = 7 -/// alignTo(17, 8, 1) = 17 -/// alignTo(~0LL, 8, 3) = 3 -/// alignTo(321, 255, 42) = 552 -/// \endcode -/// -/// May overflow. -template <typename U, typename V, typename W, - typename T = common_uint<common_uint<U, V>, W>> -constexpr T -alignTo (U Value, V Align, W Skew) -{ - assert (Align != 0u && "Align can't be 0."); - Skew %= Align; - return alignTo (Value - Skew, Align) + Skew; -} - -/// Returns the next integer (mod 2**nbits) that is greater than or equal to -/// \p Value and is a multiple of \c Align. \c Align must be non-zero. -/// -/// Will overflow only if result is not representable in T. -template <auto Align, typename V, typename T = common_uint<decltype (Align), V>> -constexpr T -alignTo (V Value) -{ - static_assert (Align != 0u, "Align must be non-zero"); - T CeilDiv = divideCeil (Value, Align); - return CeilDiv * Align; -} - -/// Returns the largest unsigned integer less than or equal to \p Value and is -/// \p Skew mod \p Align. \p Align must be non-zero. Guaranteed to never -/// overflow. -template <typename U, typename V, typename W = uint8_t, - typename T = common_uint<common_uint<U, V>, W>> -constexpr T -alignDown (U Value, V Align, W Skew = 0) -{ - assert (Align != 0u && "Align can't be 0."); - Skew %= Align; - return (Value - Skew) / Align * Align + Skew; -} - -/// Sign-extend the number in the bottom B bits of X to a 32-bit integer. -/// Requires B <= 32. -template <unsigned B> -constexpr int32_t -SignExtend32 (uint32_t X) -{ - static_assert (B <= 32, "Bit width out of range."); - if constexpr (B == 0) - { - return 0; - } - return int32_t (X << (32 - B)) >> (32 - B); -} - -/// Sign-extend the number in the bottom B bits of X to a 32-bit integer. -/// Requires B <= 32. -inline int32_t -SignExtend32 (uint32_t X, unsigned B) -{ - assert (B <= 32 && "Bit width out of range."); - if (B == 0) - { - return 0; - } - return int32_t (X << (32 - B)) >> (32 - B); -} - -/// Sign-extend the number in the bottom B bits of X to a 64-bit integer. -/// Requires B <= 64. -template <unsigned B> -constexpr int64_t -SignExtend64 (uint64_t x) -{ - static_assert (B <= 64, "Bit width out of range."); - if constexpr (B == 0) - { - return 0; - } - return int64_t (x << (64 - B)) >> (64 - B); -} - -/// Sign-extend the number in the bottom B bits of X to a 64-bit integer. -/// Requires B <= 64. -inline int64_t -SignExtend64 (uint64_t X, unsigned B) -{ - assert (B <= 64 && "Bit width out of range."); - if (B == 0) - { - return 0; - } - return int64_t (X << (64 - B)) >> (64 - B); -} - -/// Return the absolute value of a signed integer, converted to the -/// corresponding unsigned integer type. Avoids undefined behavior in std::abs -/// when you pass it INT_MIN or similar. -template <typename T, typename U = std::make_unsigned_t<T>> -constexpr U -AbsoluteValue (T X) -{ - // If X is negative, cast it to the unsigned type _before_ negating it. - return X < 0 ? -static_cast<U> (X) : X; -} - -/// Subtract two unsigned integers, X and Y, of type T and return the absolute -/// value of the result. -template <typename U, typename V, typename T = common_uint<U, V>> -constexpr T -AbsoluteDifference (U X, V Y) -{ - return X > Y ? (X - Y) : (Y - X); -} - -/// Add two unsigned integers, X and Y, of type T. Clamp the result to the -/// maximum representable value of T on overflow. ResultOverflowed indicates if -/// the result is larger than the maximum representable value of type T. -template <typename T> -std::enable_if_t<std::is_unsigned_v<T>, T> -SaturatingAdd (T X, T Y, bool *ResultOverflowed = nullptr) -{ - bool Dummy; - bool &Overflowed = ResultOverflowed ? *ResultOverflowed : Dummy; - // Hacker's Delight, p. 29 - T Z = X + Y; - Overflowed = (Z < X || Z < Y); - if (Overflowed) - { - return std::numeric_limits<T>::max (); - } - else - { - return Z; - } -} - -/// Add multiple unsigned integers of type T. Clamp the result to the -/// maximum representable value of T on overflow. -template <class T, class... Ts> -std::enable_if_t<std::is_unsigned_v<T>, T> -SaturatingAdd (T X, T Y, T Z, Ts... Args) -{ - bool Overflowed = false; - T XY = SaturatingAdd (X, Y, &Overflowed); - if (Overflowed) - { - return SaturatingAdd (std::numeric_limits<T>::max (), T (1), Args...); - } - return SaturatingAdd (XY, Z, Args...); -} - -/// Multiply two unsigned integers, X and Y, of type T. Clamp the result to the -/// maximum representable value of T on overflow. ResultOverflowed indicates if -/// the result is larger than the maximum representable value of type T. -template <typename T> -std::enable_if_t<std::is_unsigned_v<T>, T> -SaturatingMultiply (T X, T Y, bool *ResultOverflowed = nullptr) -{ - bool Dummy; - bool &Overflowed = ResultOverflowed ? *ResultOverflowed : Dummy; - - // Hacker's Delight, p. 30 has a different algorithm, but we don't use that - // because it fails for uint16_t (where multiplication can have undefined - // behavior due to promotion to int), and requires a division in addition - // to the multiplication. - - Overflowed = false; - - // Log2(Z) would be either Log2Z or Log2Z + 1. - // Special case: if X or Y is 0, Log2_64 gives -1, and Log2Z - // will necessarily be less than Log2Max as desired. - int Log2Z = Log2_64 (X) + Log2_64 (Y); - const T Max = std::numeric_limits<T>::max (); - int Log2Max = Log2_64 (Max); - if (Log2Z < Log2Max) - { - return X * Y; - } - if (Log2Z > Log2Max) - { - Overflowed = true; - return Max; - } - - // We're going to use the top bit, and maybe overflow one - // bit past it. Multiply all but the bottom bit then add - // that on at the end. - T Z = (X >> 1) * Y; - if (Z & ~(Max >> 1)) - { - Overflowed = true; - return Max; - } - Z <<= 1; - if (X & 1) - { - return SaturatingAdd (Z, Y, ResultOverflowed); - } - - return Z; -} - -/// Multiply two unsigned integers, X and Y, and add the unsigned integer, A to -/// the product. Clamp the result to the maximum representable value of T on -/// overflow. ResultOverflowed indicates if the result is larger than the -/// maximum representable value of type T. -template <typename T> -std::enable_if_t<std::is_unsigned_v<T>, T> -SaturatingMultiplyAdd (T X, T Y, T A, bool *ResultOverflowed = nullptr) -{ - bool Dummy; - bool &Overflowed = ResultOverflowed ? *ResultOverflowed : Dummy; - - T Product = SaturatingMultiply (X, Y, &Overflowed); - if (Overflowed) - { - return Product; - } - - return SaturatingAdd (A, Product, &Overflowed); -} - -/// Use this rather than HUGE_VALF; the latter causes warnings on MSVC. -RCC_ABI extern const float huge_valf; - -/// Add two signed integers, computing the two's complement truncated result, -/// returning a pair {result, overflow}, where "overflow" is a boolean value -/// indicating whether an overflow occurred. -template <typename T> -constexpr std::enable_if_t<std::is_signed_v<T>, std::pair<T, bool>> -AddOverflow (T X, T Y) -{ - // Perform the unsigned addition. - using U = std::make_unsigned_t<T>; - const U UX = static_cast<U> (X); - const U UY = static_cast<U> (Y); - const U UResult = UX + UY; - - // Convert to signed. - auto Result = static_cast<T> (UResult); - - // Adding two positive numbers should result in a positive number. - if (X > 0 && Y > 0) - { - return {Result, Result <= 0}; - } - // Adding two negatives should result in a negative number. - if (X < 0 && Y < 0) - { - return {Result, Result >= 0}; - } - return {Result, false}; -} - -/// Add two signed integers, computing the two's complement truncated result, -/// returning true if overflow occurred. -template <typename T> -std::enable_if_t<std::is_signed_v<T>, bool> -AddOverflow (T X, T Y, T &Result) -{ -#if __has_builtin(__builtin_add_overflow) - return __builtin_add_overflow (X, Y, &Result); -#else - auto [Res, Ovf] = AddOverflow (X, Y); - Result = Res; - return Ovf; -#endif -} - -/// Subtract two signed integers, computing the two's complement truncated -/// result, returning a pair {result, overflow}, where "overflow" is a -/// boolean value indicating whether an overflow occurred. -template <typename T> -constexpr std::enable_if_t<std::is_signed_v<T>, std::pair<T, bool>> -SubOverflow (T X, T Y) -{ - // Perform the unsigned addition. - using U = std::make_unsigned_t<T>; - const U UX = static_cast<U> (X); - const U UY = static_cast<U> (Y); - const U UResult = UX - UY; - - // Convert to signed. - auto Result = static_cast<T> (UResult); - - // Subtracting a positive number from a negative results in a negative number. - if (X <= 0 && Y > 0) - { - return {Result, Result >= 0}; - } - // Subtracting a negative number from a positive results in a positive number. - if (X >= 0 && Y < 0) - { - return {Result, Result <= 0}; - } - return {Result, false}; -} - -/// Subtract two signed integers, computing the two's complement truncated -/// result, returning true if an overflow occurred. -template <typename T> -std::enable_if_t<std::is_signed_v<T>, bool> -SubOverflow (T X, T Y, T &Result) -{ -#if __has_builtin(__builtin_sub_overflow) - return __builtin_sub_overflow (X, Y, &Result); -#else - auto [Res, Ovf] = SubOverflow (X, Y); - Result = Res; - return Ovf; -#endif -} - -/// Multiply two signed integers, computing the two's complement truncated -/// result, returning a pair {result, overflow}, where "overflow" is a -/// boolean value indicating whether an overflow occurred. -template <typename T> -constexpr std::enable_if_t<std::is_signed_v<T>, std::pair<T, bool>> -MulOverflow (T X, T Y) -{ - // Perform the unsigned multiplication on absolute values. - using U = std::make_unsigned_t<T>; - const U UX = X < 0 ? (0 - static_cast<U> (X)) : static_cast<U> (X); - const U UY = Y < 0 ? (0 - static_cast<U> (Y)) : static_cast<U> (Y); - const U UResult = UX * UY; - - // Convert to signed. - const bool IsNegative = (X < 0) ^ (Y < 0); - auto Result = IsNegative ? (0 - UResult) : UResult; - - // If any of the args was 0, result is 0 and no overflow occurs. - if (UX == 0 || UY == 0) - { - return {Result, false}; - } - - // UX and UY are in [1, 2^n], where n is the number of digits. - // Check how the max allowed absolute value (2^n for negative, 2^(n-1) for - // positive) divided by an argument compares to the other. - bool Overflow = - IsNegative - ? UX > (static_cast<U> (std::numeric_limits<T>::max ()) + U (1)) / UY - : UX > (static_cast<U> (std::numeric_limits<T>::max ())) / UY; - - return {Result, Overflow}; -} - -/// Multiply two signed integers, computing the two's complement truncated -/// result, returning true if an overflow occurred. -template <typename T> -std::enable_if_t<std::is_signed_v<T>, bool> -MulOverflow (T X, T Y, T &Result) -{ -#if __has_builtin(__builtin_mul_overflow) - return __builtin_mul_overflow (X, Y, &Result); -#else - auto [Res, Ovf] = MulOverflow (X, Y); - Result = Res; - return Ovf; -#endif -} - -/// Type to force float point values onto the stack, so that x86 doesn't add -/// hidden precision, avoiding rounding differences on various platforms. -#if defined(__i386__) || defined(_M_IX86) -using stack_float_t = volatile float; -#else -using stack_float_t = float; -#endif - -/// Returns the number of digits in the given integer. -RCC_ABI int -NumDigitsBase10 (uint64_t X); - -} // namespace rcc - -#endif diff --git a/rcc/lib/CMakeLists.txt b/rcc/lib/CMakeLists.txt deleted file mode 100644 index 6ab18c4..0000000 --- a/rcc/lib/CMakeLists.txt +++ /dev/null @@ -1,7 +0,0 @@ -# SPDX-License-Identifier: GPL-3.0-or-later - -add_rcc_library(RCCSupport - STATIC - Support/Errno.cc - Support/MathExtras.cc -) diff --git a/rcc/lib/Support/Errno.cc b/rcc/lib/Support/Errno.cc deleted file mode 100644 index f0161a6..0000000 --- a/rcc/lib/Support/Errno.cc +++ /dev/null @@ -1,79 +0,0 @@ -/* - RCC-Project - - Copyright (C) 2026 Richard Qin - - This file is part of RCC-Project. - - RCC-Project is free software; you can redistribute it and/or modify it under - the terms of the GNU General Public License as published by the Free - Software Foundation; either version 3 of the License, or (at your option) any - later version. - - RCC-Project is distributed in the hope that it will be useful, but WITHOUT ANY - WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR - A PARTICULAR PURPOSE. See the GNU General Public License for more details. - - You should have received a copy of the GNU General Public License along with - RCC-Project; see the file COPYING. If not see - <http://www.gnu.org/licenses/>. -*/ - -// This implementation is based on llvm/lib/Support/Errno.cpp. - -#include "rcc/Support/Errno.h" -#include "rcc/Config/config.h" - -#include <cstring> -#include <errno.h> - -namespace rcc -{ -namespace sys -{ - -std::string -StrError () -{ - return StrError (errno); -} - -std::string -StrError (int errnum) -{ - std::string str; - if (errnum == 0) - { - return str; - } - -#if defined(HAVE_STRERROR_R) || HAVE_DECL_STRERROR_S - const int maxErrStrLen = 2000; - char buffer[maxErrStrLen]; - buffer[0] = '\0'; -#endif - -#ifdef HAVE_STRERROR_R - // strerror_r is thread-safe. -#if defined(__GLIBC__) && defined(_GNU_SOURCE) - // glibc defines its own incompatible version of strerror_r which may not - // use the buffer supplied. - str = strerror_r (errnum, buffer, maxErrStrLen - 1); -#else - strerror_r (errnum, buffer, maxErrStrLen - 1); - str = buffer; -#endif -#elif HAVE_DECL_STRERROR_S - // Windows Secure API. - strerror_s (buffer, maxErrStrLen - 1, errnum); - str = buffer; -#else - // Copy the thread-unsafe result of strerror into the buffer as fast as - // possible to minimize the impact of collisions in multiple threads. - str = strerror (errnum); -#endif - return str; -} - -} // namespace sys -} // namespace rcc diff --git a/rcc/lib/Support/MathExtras.cc b/rcc/lib/Support/MathExtras.cc deleted file mode 100644 index f0db3a4..0000000 --- a/rcc/lib/Support/MathExtras.cc +++ /dev/null @@ -1,97 +0,0 @@ -/* - RCC-Project - - Copyright (C) 2026 Richard Qin - - This file is part of RCC-Project. - - RCC-Project is free software; you can redistribute it and/or modify it under - the terms of the GNU General Public License as published by the Free - Software Foundation; either version 3 of the License, or (at your option) any - later version. - - RCC-Project is distributed in the hope that it will be useful, but WITHOUT ANY - WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR - A PARTICULAR PURPOSE. See the GNU General Public License for more details. - - You should have received a copy of the GNU General Public License along with - RCC-Project; see the file COPYING. If not see - <http://www.gnu.org/licenses/>. -*/ - -//===-- MathExtras.cpp - Implement the MathExtras header --------------===// -// -// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. -// See https://llvm.org/LICENSE.txt for license information. -// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception -// -//===----------------------------------------------------------------------===// -// -// This file implements the MathExtras.h header -// -//===----------------------------------------------------------------------===// - -#include "rcc/Support/MathExtras.h" - -#ifdef _MSC_VER -#include <limits> -#else -#include <cmath> -#endif - -namespace rcc -{ - -#if defined(_MSC_VER) -// Visual Studio defines the HUGE_VAL class of macros using purposeful -// constant arithmetic overflow, which it then warns on when encountered. -const float huge_valf = std::numeric_limits<float>::infinity (); -#else -const float huge_valf = HUGE_VALF; -#endif - -/// Returns the number of digits in the given integer. -int -NumDigitsBase10 (uint64_t X) -{ - static constexpr struct ConstexprData - { - uint8_t AtLeast[65] = {}; - uint64_t Boundaries[20] = {}; - static constexpr int - NumDigitsConstexpr (uint64_t N) - { - int res = 1; - while (N >= 10) - { - res++; - N /= 10; - } - return res; - } - constexpr ConstexprData () - { - uint64_t Val = ~0ull; - for (uint64_t i = 0; i <= 64; i++) - { - uint64_t Digits = NumDigitsConstexpr (Val) - 1; - AtLeast[i] = Digits; - Val >>= 1; - } - // Special case because X=0 should return 1 and not 0 - Boundaries[0] = 0; - Val = 10; - for (uint64_t i = 1; i < 20; i++) - { - Boundaries[i] = Val; - Val *= 10; - } - } - } Data; - - uint64_t Base2 = X ? std::countl_zero (X) : 64; - uint64_t Digits = Data.AtLeast[Base2]; - return Digits + (X >= Data.Boundaries[Digits]); -} - -} // namespace rcc |