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+// Formatting library for C++ - optional OS-specific functionality
+//
+// Copyright (c) 2012 - present, Victor Zverovich
+// All rights reserved.
+//
+// For the license information refer to format.h.
+
+#ifndef FMT_OS_H_
+#define FMT_OS_H_
+
+#if defined(__MINGW32__) || defined(__CYGWIN__)
+// Workaround MinGW bug https://sourceforge.net/p/mingw/bugs/2024/.
+# undef __STRICT_ANSI__
+#endif
+
+#include <cerrno>
+#include <clocale> // for locale_t
+#include <cstddef>
+#include <cstdio>
+#include <cstdlib> // for strtod_l
+
+#if defined __APPLE__ || defined(__FreeBSD__)
+# include <xlocale.h> // for LC_NUMERIC_MASK on OS X
+#endif
+
+#include "format.h"
+
+// UWP doesn't provide _pipe.
+#if FMT_HAS_INCLUDE("winapifamily.h")
+# include <winapifamily.h>
+#endif
+#if (FMT_HAS_INCLUDE(<fcntl.h>) || defined(__APPLE__) || \
+ defined(__linux__)) && \
+ (!defined(WINAPI_FAMILY) || (WINAPI_FAMILY == WINAPI_FAMILY_DESKTOP_APP))
+# include <fcntl.h> // for O_RDONLY
+# define FMT_USE_FCNTL 1
+#else
+# define FMT_USE_FCNTL 0
+#endif
+
+#ifndef FMT_POSIX
+# if defined(_WIN32) && !defined(__MINGW32__)
+// Fix warnings about deprecated symbols.
+# define FMT_POSIX(call) _##call
+# else
+# define FMT_POSIX(call) call
+# endif
+#endif
+
+// Calls to system functions are wrapped in FMT_SYSTEM for testability.
+#ifdef FMT_SYSTEM
+# define FMT_POSIX_CALL(call) FMT_SYSTEM(call)
+#else
+# define FMT_SYSTEM(call) ::call
+# ifdef _WIN32
+// Fix warnings about deprecated symbols.
+# define FMT_POSIX_CALL(call) ::_##call
+# else
+# define FMT_POSIX_CALL(call) ::call
+# endif
+#endif
+
+// Retries the expression while it evaluates to error_result and errno
+// equals to EINTR.
+#ifndef _WIN32
+# define FMT_RETRY_VAL(result, expression, error_result) \
+ do { \
+ (result) = (expression); \
+ } while ((result) == (error_result) && errno == EINTR)
+#else
+# define FMT_RETRY_VAL(result, expression, error_result) result = (expression)
+#endif
+
+#define FMT_RETRY(result, expression) FMT_RETRY_VAL(result, expression, -1)
+
+FMT_BEGIN_NAMESPACE
+
+/**
+ \rst
+ A reference to a null-terminated string. It can be constructed from a C
+ string or ``std::string``.
+
+ You can use one of the following type aliases for common character types:
+
+ +---------------+-----------------------------+
+ | Type | Definition |
+ +===============+=============================+
+ | cstring_view | basic_cstring_view<char> |
+ +---------------+-----------------------------+
+ | wcstring_view | basic_cstring_view<wchar_t> |
+ +---------------+-----------------------------+
+
+ This class is most useful as a parameter type to allow passing
+ different types of strings to a function, for example::
+
+ template <typename... Args>
+ std::string format(cstring_view format_str, const Args & ... args);
+
+ format("{}", 42);
+ format(std::string("{}"), 42);
+ \endrst
+ */
+template <typename Char> class basic_cstring_view {
+ private:
+ const Char* data_;
+
+ public:
+ /** Constructs a string reference object from a C string. */
+ basic_cstring_view(const Char* s) : data_(s) {}
+
+ /**
+ \rst
+ Constructs a string reference from an ``std::string`` object.
+ \endrst
+ */
+ basic_cstring_view(const std::basic_string<Char>& s) : data_(s.c_str()) {}
+
+ /** Returns the pointer to a C string. */
+ const Char* c_str() const { return data_; }
+};
+
+using cstring_view = basic_cstring_view<char>;
+using wcstring_view = basic_cstring_view<wchar_t>;
+
+// An error code.
+class error_code {
+ private:
+ int value_;
+
+ public:
+ explicit error_code(int value = 0) FMT_NOEXCEPT : value_(value) {}
+
+ int get() const FMT_NOEXCEPT { return value_; }
+};
+
+#ifdef _WIN32
+namespace detail {
+// A converter from UTF-16 to UTF-8.
+// It is only provided for Windows since other systems support UTF-8 natively.
+class utf16_to_utf8 {
+ private:
+ memory_buffer buffer_;
+
+ public:
+ utf16_to_utf8() {}
+ FMT_API explicit utf16_to_utf8(wstring_view s);
+ operator string_view() const { return string_view(&buffer_[0], size()); }
+ size_t size() const { return buffer_.size() - 1; }
+ const char* c_str() const { return &buffer_[0]; }
+ std::string str() const { return std::string(&buffer_[0], size()); }
+
+ // Performs conversion returning a system error code instead of
+ // throwing exception on conversion error. This method may still throw
+ // in case of memory allocation error.
+ FMT_API int convert(wstring_view s);
+};
+
+FMT_API void format_windows_error(buffer<char>& out, int error_code,
+ string_view message) FMT_NOEXCEPT;
+} // namespace detail
+
+/** A Windows error. */
+class windows_error : public system_error {
+ private:
+ FMT_API void init(int error_code, string_view format_str, format_args args);
+
+ public:
+ /**
+ \rst
+ Constructs a :class:`fmt::windows_error` object with the description
+ of the form
+
+ .. parsed-literal::
+ *<message>*: *<system-message>*
+
+ where *<message>* is the formatted message and *<system-message>* is the
+ system message corresponding to the error code.
+ *error_code* is a Windows error code as given by ``GetLastError``.
+ If *error_code* is not a valid error code such as -1, the system message
+ will look like "error -1".
+
+ **Example**::
+
+ // This throws a windows_error with the description
+ // cannot open file 'madeup': The system cannot find the file specified.
+ // or similar (system message may vary).
+ const char *filename = "madeup";
+ LPOFSTRUCT of = LPOFSTRUCT();
+ HFILE file = OpenFile(filename, &of, OF_READ);
+ if (file == HFILE_ERROR) {
+ throw fmt::windows_error(GetLastError(),
+ "cannot open file '{}'", filename);
+ }
+ \endrst
+ */
+ template <typename... Args>
+ windows_error(int error_code, string_view message, const Args&... args) {
+ init(error_code, message, make_format_args(args...));
+ }
+};
+
+// Reports a Windows error without throwing an exception.
+// Can be used to report errors from destructors.
+FMT_API void report_windows_error(int error_code,
+ string_view message) FMT_NOEXCEPT;
+#endif // _WIN32
+
+// A buffered file.
+class buffered_file {
+ private:
+ FILE* file_;
+
+ friend class file;
+
+ explicit buffered_file(FILE* f) : file_(f) {}
+
+ public:
+ buffered_file(const buffered_file&) = delete;
+ void operator=(const buffered_file&) = delete;
+
+ // Constructs a buffered_file object which doesn't represent any file.
+ buffered_file() FMT_NOEXCEPT : file_(nullptr) {}
+
+ // Destroys the object closing the file it represents if any.
+ FMT_API ~buffered_file() FMT_NOEXCEPT;
+
+ public:
+ buffered_file(buffered_file&& other) FMT_NOEXCEPT : file_(other.file_) {
+ other.file_ = nullptr;
+ }
+
+ buffered_file& operator=(buffered_file&& other) {
+ close();
+ file_ = other.file_;
+ other.file_ = nullptr;
+ return *this;
+ }
+
+ // Opens a file.
+ FMT_API buffered_file(cstring_view filename, cstring_view mode);
+
+ // Closes the file.
+ FMT_API void close();
+
+ // Returns the pointer to a FILE object representing this file.
+ FILE* get() const FMT_NOEXCEPT { return file_; }
+
+ // We place parentheses around fileno to workaround a bug in some versions
+ // of MinGW that define fileno as a macro.
+ FMT_API int(fileno)() const;
+
+ void vprint(string_view format_str, format_args args) {
+ fmt::vprint(file_, format_str, args);
+ }
+
+ template <typename... Args>
+ inline void print(string_view format_str, const Args&... args) {
+ vprint(format_str, make_format_args(args...));
+ }
+};
+
+#if FMT_USE_FCNTL
+// A file. Closed file is represented by a file object with descriptor -1.
+// Methods that are not declared with FMT_NOEXCEPT may throw
+// fmt::system_error in case of failure. Note that some errors such as
+// closing the file multiple times will cause a crash on Windows rather
+// than an exception. You can get standard behavior by overriding the
+// invalid parameter handler with _set_invalid_parameter_handler.
+class file {
+ private:
+ int fd_; // File descriptor.
+
+ // Constructs a file object with a given descriptor.
+ explicit file(int fd) : fd_(fd) {}
+
+ public:
+ // Possible values for the oflag argument to the constructor.
+ enum {
+ RDONLY = FMT_POSIX(O_RDONLY), // Open for reading only.
+ WRONLY = FMT_POSIX(O_WRONLY), // Open for writing only.
+ RDWR = FMT_POSIX(O_RDWR), // Open for reading and writing.
+ CREATE = FMT_POSIX(O_CREAT), // Create if the file doesn't exist.
+ APPEND = FMT_POSIX(O_APPEND) // Open in append mode.
+ };
+
+ // Constructs a file object which doesn't represent any file.
+ file() FMT_NOEXCEPT : fd_(-1) {}
+
+ // Opens a file and constructs a file object representing this file.
+ FMT_API file(cstring_view path, int oflag);
+
+ public:
+ file(const file&) = delete;
+ void operator=(const file&) = delete;
+
+ file(file&& other) FMT_NOEXCEPT : fd_(other.fd_) { other.fd_ = -1; }
+
+ file& operator=(file&& other) FMT_NOEXCEPT {
+ close();
+ fd_ = other.fd_;
+ other.fd_ = -1;
+ return *this;
+ }
+
+ // Destroys the object closing the file it represents if any.
+ FMT_API ~file() FMT_NOEXCEPT;
+
+ // Returns the file descriptor.
+ int descriptor() const FMT_NOEXCEPT { return fd_; }
+
+ // Closes the file.
+ FMT_API void close();
+
+ // Returns the file size. The size has signed type for consistency with
+ // stat::st_size.
+ FMT_API long long size() const;
+
+ // Attempts to read count bytes from the file into the specified buffer.
+ FMT_API size_t read(void* buffer, size_t count);
+
+ // Attempts to write count bytes from the specified buffer to the file.
+ FMT_API size_t write(const void* buffer, size_t count);
+
+ // Duplicates a file descriptor with the dup function and returns
+ // the duplicate as a file object.
+ FMT_API static file dup(int fd);
+
+ // Makes fd be the copy of this file descriptor, closing fd first if
+ // necessary.
+ FMT_API void dup2(int fd);
+
+ // Makes fd be the copy of this file descriptor, closing fd first if
+ // necessary.
+ FMT_API void dup2(int fd, error_code& ec) FMT_NOEXCEPT;
+
+ // Creates a pipe setting up read_end and write_end file objects for reading
+ // and writing respectively.
+ FMT_API static void pipe(file& read_end, file& write_end);
+
+ // Creates a buffered_file object associated with this file and detaches
+ // this file object from the file.
+ FMT_API buffered_file fdopen(const char* mode);
+};
+
+// Returns the memory page size.
+long getpagesize();
+
+namespace detail {
+
+struct buffer_size {
+ size_t value = 0;
+ buffer_size operator=(size_t val) const {
+ auto bs = buffer_size();
+ bs.value = val;
+ return bs;
+ }
+};
+
+struct ostream_params {
+ int oflag = file::WRONLY | file::CREATE;
+ size_t buffer_size = BUFSIZ > 32768 ? BUFSIZ : 32768;
+
+ ostream_params() {}
+
+ template <typename... T>
+ ostream_params(T... params, int oflag) : ostream_params(params...) {
+ this->oflag = oflag;
+ }
+
+ template <typename... T>
+ ostream_params(T... params, detail::buffer_size bs)
+ : ostream_params(params...) {
+ this->buffer_size = bs.value;
+ }
+};
+} // namespace detail
+
+static constexpr detail::buffer_size buffer_size;
+
+// A fast output stream which is not thread-safe.
+class ostream final : private detail::buffer<char> {
+ private:
+ file file_;
+
+ void flush() {
+ if (size() == 0) return;
+ file_.write(data(), size());
+ clear();
+ }
+
+ FMT_API void grow(size_t) override final;
+
+ ostream(cstring_view path, const detail::ostream_params& params)
+ : file_(path, params.oflag) {
+ set(new char[params.buffer_size], params.buffer_size);
+ }
+
+ public:
+ ostream(ostream&& other)
+ : detail::buffer<char>(other.data(), other.size(), other.capacity()),
+ file_(std::move(other.file_)) {
+ other.set(nullptr, 0);
+ }
+ ~ostream() {
+ flush();
+ delete[] data();
+ }
+
+ template <typename... T>
+ friend ostream output_file(cstring_view path, T... params);
+
+ void close() {
+ flush();
+ file_.close();
+ }
+
+ template <typename S, typename... Args>
+ void print(const S& format_str, const Args&... args) {
+ format_to(detail::buffer_appender<char>(*this), format_str, args...);
+ }
+};
+
+/**
+ Opens a file for writing. Supported parameters passed in `params`:
+ * ``<integer>``: Output flags (``file::WRONLY | file::CREATE`` by default)
+ * ``buffer_size=<integer>``: Output buffer size
+ */
+template <typename... T>
+inline ostream output_file(cstring_view path, T... params) {
+ return {path, detail::ostream_params(params...)};
+}
+#endif // FMT_USE_FCNTL
+
+#ifdef FMT_LOCALE
+// A "C" numeric locale.
+class locale {
+ private:
+# ifdef _WIN32
+ using locale_t = _locale_t;
+
+ static void freelocale(locale_t loc) { _free_locale(loc); }
+
+ static double strtod_l(const char* nptr, char** endptr, _locale_t loc) {
+ return _strtod_l(nptr, endptr, loc);
+ }
+# endif
+
+ locale_t locale_;
+
+ public:
+ using type = locale_t;
+ locale(const locale&) = delete;
+ void operator=(const locale&) = delete;
+
+ locale() {
+# ifndef _WIN32
+ locale_ = FMT_SYSTEM(newlocale(LC_NUMERIC_MASK, "C", nullptr));
+# else
+ locale_ = _create_locale(LC_NUMERIC, "C");
+# endif
+ if (!locale_) FMT_THROW(system_error(errno, "cannot create locale"));
+ }
+ ~locale() { freelocale(locale_); }
+
+ type get() const { return locale_; }
+
+ // Converts string to floating-point number and advances str past the end
+ // of the parsed input.
+ double strtod(const char*& str) const {
+ char* end = nullptr;
+ double result = strtod_l(str, &end, locale_);
+ str = end;
+ return result;
+ }
+};
+using Locale FMT_DEPRECATED_ALIAS = locale;
+#endif // FMT_LOCALE
+FMT_END_NAMESPACE
+
+#endif // FMT_OS_H_