535 lines
18 KiB
C++
535 lines
18 KiB
C++
// Formatting library for C++
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//
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// Copyright (c) 2012 - 2016, Victor Zverovich
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// All rights reserved.
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//
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// For the license information refer to format.h.
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#ifndef FMT_FORMAT_INL_H_
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#define FMT_FORMAT_INL_H_
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#include "format.h"
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#include <string.h>
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#include <cctype>
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#include <cerrno>
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#include <climits>
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#include <cmath>
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#include <cstdarg>
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#include <cstddef> // for std::ptrdiff_t
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#include <locale>
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#if defined(_WIN32) && defined(__MINGW32__)
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#include <cstring>
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#endif
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#if FMT_USE_WINDOWS_H
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#if !defined(FMT_HEADER_ONLY) && !defined(WIN32_LEAN_AND_MEAN)
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#define WIN32_LEAN_AND_MEAN
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#endif
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#if defined(NOMINMAX) || defined(FMT_WIN_MINMAX)
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#include <windows.h>
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#else
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#define NOMINMAX
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#include <windows.h>
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#undef NOMINMAX
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#endif
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#endif
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#if FMT_EXCEPTIONS
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#define FMT_TRY try
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#define FMT_CATCH(x) catch (x)
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#else
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#define FMT_TRY if (true)
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#define FMT_CATCH(x) if (false)
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#endif
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#ifdef _MSC_VER
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#pragma warning(push)
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#pragma warning(disable : 4127) // conditional expression is constant
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#pragma warning(disable : 4702) // unreachable code
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// Disable deprecation warning for strerror. The latter is not called but
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// MSVC fails to detect it.
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#pragma warning(disable : 4996)
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#endif
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// Dummy implementations of strerror_r and strerror_s called if corresponding
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// system functions are not available.
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inline fmt::internal::null<> strerror_r(int, char *, ...)
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{
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return fmt::internal::null<>();
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}
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inline fmt::internal::null<> strerror_s(char *, std::size_t, ...)
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{
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return fmt::internal::null<>();
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}
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FMT_BEGIN_NAMESPACE
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namespace {
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#ifndef _MSC_VER
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#define FMT_SNPRINTF snprintf
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#else // _MSC_VER
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inline int fmt_snprintf(char *buffer, size_t size, const char *format, ...)
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{
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va_list args;
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va_start(args, format);
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int result = vsnprintf_s(buffer, size, _TRUNCATE, format, args);
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va_end(args);
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return result;
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}
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#define FMT_SNPRINTF fmt_snprintf
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#endif // _MSC_VER
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#if defined(_WIN32) && defined(__MINGW32__) && !defined(__NO_ISOCEXT)
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#define FMT_SWPRINTF snwprintf
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#else
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#define FMT_SWPRINTF swprintf
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#endif // defined(_WIN32) && defined(__MINGW32__) && !defined(__NO_ISOCEXT)
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const char RESET_COLOR[] = "\x1b[0m";
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const wchar_t WRESET_COLOR[] = L"\x1b[0m";
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typedef void (*FormatFunc)(internal::buffer &, int, string_view);
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// Portable thread-safe version of strerror.
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// Sets buffer to point to a string describing the error code.
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// This can be either a pointer to a string stored in buffer,
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// or a pointer to some static immutable string.
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// Returns one of the following values:
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// 0 - success
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// ERANGE - buffer is not large enough to store the error message
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// other - failure
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// Buffer should be at least of size 1.
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int safe_strerror(int error_code, char *&buffer, std::size_t buffer_size) FMT_NOEXCEPT
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{
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FMT_ASSERT(buffer != FMT_NULL && buffer_size != 0, "invalid buffer");
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class dispatcher
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{
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private:
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int error_code_;
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char *&buffer_;
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std::size_t buffer_size_;
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// A noop assignment operator to avoid bogus warnings.
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void operator=(const dispatcher &) {}
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// Handle the result of XSI-compliant version of strerror_r.
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int handle(int result)
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{
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// glibc versions before 2.13 return result in errno.
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return result == -1 ? errno : result;
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}
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// Handle the result of GNU-specific version of strerror_r.
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int handle(char *message)
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{
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// If the buffer is full then the message is probably truncated.
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if (message == buffer_ && strlen(buffer_) == buffer_size_ - 1)
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return ERANGE;
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buffer_ = message;
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return 0;
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}
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// Handle the case when strerror_r is not available.
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int handle(internal::null<>)
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{
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return fallback(strerror_s(buffer_, buffer_size_, error_code_));
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}
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// Fallback to strerror_s when strerror_r is not available.
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int fallback(int result)
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{
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// If the buffer is full then the message is probably truncated.
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return result == 0 && strlen(buffer_) == buffer_size_ - 1 ? ERANGE : result;
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}
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// Fallback to strerror if strerror_r and strerror_s are not available.
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int fallback(internal::null<>)
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{
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errno = 0;
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buffer_ = strerror(error_code_);
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return errno;
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}
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public:
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dispatcher(int err_code, char *&buf, std::size_t buf_size)
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: error_code_(err_code)
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, buffer_(buf)
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, buffer_size_(buf_size)
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{
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}
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int run()
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{
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return handle(strerror_r(error_code_, buffer_, buffer_size_));
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}
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};
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return dispatcher(error_code, buffer, buffer_size).run();
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}
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void format_error_code(internal::buffer &out, int error_code, string_view message) FMT_NOEXCEPT
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{
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// Report error code making sure that the output fits into
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// inline_buffer_size to avoid dynamic memory allocation and potential
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// bad_alloc.
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out.resize(0);
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static const char SEP[] = ": ";
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static const char ERROR_STR[] = "error ";
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// Subtract 2 to account for terminating null characters in SEP and ERROR_STR.
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std::size_t error_code_size = sizeof(SEP) + sizeof(ERROR_STR) - 2;
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typedef internal::int_traits<int>::main_type main_type;
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main_type abs_value = static_cast<main_type>(error_code);
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if (internal::is_negative(error_code))
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{
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abs_value = 0 - abs_value;
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++error_code_size;
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}
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error_code_size += internal::count_digits(abs_value);
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writer w(out);
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if (message.size() <= inline_buffer_size - error_code_size)
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{
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w.write(message);
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w.write(SEP);
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}
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w.write(ERROR_STR);
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w.write(error_code);
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assert(out.size() <= inline_buffer_size);
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}
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void report_error(FormatFunc func, int error_code, string_view message) FMT_NOEXCEPT
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{
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memory_buffer full_message;
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func(full_message, error_code, message);
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// Use Writer::data instead of Writer::c_str to avoid potential memory
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// allocation.
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std::fwrite(full_message.data(), full_message.size(), 1, stderr);
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std::fputc('\n', stderr);
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}
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} // namespace
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class locale
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{
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private:
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std::locale locale_;
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public:
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explicit locale(std::locale loc = std::locale())
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: locale_(loc)
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{
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}
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std::locale get()
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{
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return locale_;
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}
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};
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template<typename Char>
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FMT_FUNC Char internal::thousands_sep(locale_provider *lp)
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{
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std::locale loc = lp ? lp->locale().get() : std::locale();
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return std::use_facet<std::numpunct<Char>>(loc).thousands_sep();
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}
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FMT_FUNC void system_error::init(int err_code, string_view format_str, format_args args)
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{
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error_code_ = err_code;
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memory_buffer buffer;
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format_system_error(buffer, err_code, vformat(format_str, args));
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std::runtime_error &base = *this;
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base = std::runtime_error(to_string(buffer));
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}
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namespace internal {
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template<typename T>
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int char_traits<char>::format_float(char *buffer, std::size_t size, const char *format, int precision, T value)
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{
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return precision < 0 ? FMT_SNPRINTF(buffer, size, format, value) : FMT_SNPRINTF(buffer, size, format, precision, value);
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}
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template<typename T>
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int char_traits<wchar_t>::format_float(wchar_t *buffer, std::size_t size, const wchar_t *format, int precision, T value)
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{
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return precision < 0 ? FMT_SWPRINTF(buffer, size, format, value) : FMT_SWPRINTF(buffer, size, format, precision, value);
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}
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template<typename T>
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const char basic_data<T>::DIGITS[] = "0001020304050607080910111213141516171819"
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"2021222324252627282930313233343536373839"
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"4041424344454647484950515253545556575859"
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"6061626364656667686970717273747576777879"
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"8081828384858687888990919293949596979899";
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#define FMT_POWERS_OF_10(factor) \
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factor * 10, factor * 100, factor * 1000, factor * 10000, factor * 100000, factor * 1000000, factor * 10000000, factor * 100000000, \
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factor * 1000000000
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template<typename T>
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const uint32_t basic_data<T>::POWERS_OF_10_32[] = {0, FMT_POWERS_OF_10(1)};
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template<typename T>
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const uint64_t basic_data<T>::POWERS_OF_10_64[] = {0, FMT_POWERS_OF_10(1), FMT_POWERS_OF_10(1000000000ull), 10000000000000000000ull};
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// Normalized 64-bit significands of pow(10, k), for k = -348, -340, ..., 340.
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// These are generated by support/compute-powers.py.
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template<typename T>
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const uint64_t basic_data<T>::POW10_SIGNIFICANDS[] = {0xfa8fd5a0081c0288, 0xbaaee17fa23ebf76, 0x8b16fb203055ac76, 0xcf42894a5dce35ea,
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0x9a6bb0aa55653b2d, 0xe61acf033d1a45df, 0xab70fe17c79ac6ca, 0xff77b1fcbebcdc4f, 0xbe5691ef416bd60c, 0x8dd01fad907ffc3c,
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0xd3515c2831559a83, 0x9d71ac8fada6c9b5, 0xea9c227723ee8bcb, 0xaecc49914078536d, 0x823c12795db6ce57, 0xc21094364dfb5637,
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0x9096ea6f3848984f, 0xd77485cb25823ac7, 0xa086cfcd97bf97f4, 0xef340a98172aace5, 0xb23867fb2a35b28e, 0x84c8d4dfd2c63f3b,
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0xc5dd44271ad3cdba, 0x936b9fcebb25c996, 0xdbac6c247d62a584, 0xa3ab66580d5fdaf6, 0xf3e2f893dec3f126, 0xb5b5ada8aaff80b8,
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0x87625f056c7c4a8b, 0xc9bcff6034c13053, 0x964e858c91ba2655, 0xdff9772470297ebd, 0xa6dfbd9fb8e5b88f, 0xf8a95fcf88747d94,
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0xb94470938fa89bcf, 0x8a08f0f8bf0f156b, 0xcdb02555653131b6, 0x993fe2c6d07b7fac, 0xe45c10c42a2b3b06, 0xaa242499697392d3,
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0xfd87b5f28300ca0e, 0xbce5086492111aeb, 0x8cbccc096f5088cc, 0xd1b71758e219652c, 0x9c40000000000000, 0xe8d4a51000000000,
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0xad78ebc5ac620000, 0x813f3978f8940984, 0xc097ce7bc90715b3, 0x8f7e32ce7bea5c70, 0xd5d238a4abe98068, 0x9f4f2726179a2245,
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0xed63a231d4c4fb27, 0xb0de65388cc8ada8, 0x83c7088e1aab65db, 0xc45d1df942711d9a, 0x924d692ca61be758, 0xda01ee641a708dea,
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0xa26da3999aef774a, 0xf209787bb47d6b85, 0xb454e4a179dd1877, 0x865b86925b9bc5c2, 0xc83553c5c8965d3d, 0x952ab45cfa97a0b3,
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0xde469fbd99a05fe3, 0xa59bc234db398c25, 0xf6c69a72a3989f5c, 0xb7dcbf5354e9bece, 0x88fcf317f22241e2, 0xcc20ce9bd35c78a5,
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0x98165af37b2153df, 0xe2a0b5dc971f303a, 0xa8d9d1535ce3b396, 0xfb9b7cd9a4a7443c, 0xbb764c4ca7a44410, 0x8bab8eefb6409c1a,
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0xd01fef10a657842c, 0x9b10a4e5e9913129, 0xe7109bfba19c0c9d, 0xac2820d9623bf429, 0x80444b5e7aa7cf85, 0xbf21e44003acdd2d,
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0x8e679c2f5e44ff8f, 0xd433179d9c8cb841, 0x9e19db92b4e31ba9, 0xeb96bf6ebadf77d9, 0xaf87023b9bf0ee6b};
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// Binary exponents of pow(10, k), for k = -348, -340, ..., 340, corresponding
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// to significands above.
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template<typename T>
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const int16_t basic_data<T>::POW10_EXPONENTS[] = {-1220, -1193, -1166, -1140, -1113, -1087, -1060, -1034, -1007, -980, -954, -927, -901,
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-874, -847, -821, -794, -768, -741, -715, -688, -661, -635, -608, -582, -555, -529, -502, -475, -449, -422, -396, -369, -343, -316,
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-289, -263, -236, -210, -183, -157, -130, -103, -77, -50, -24, 3, 30, 56, 83, 109, 136, 162, 189, 216, 242, 269, 295, 322, 348, 375,
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402, 428, 455, 481, 508, 534, 561, 588, 614, 641, 667, 694, 720, 747, 774, 800, 827, 853, 880, 907, 933, 960, 986, 1013, 1039, 1066};
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FMT_FUNC fp operator*(fp x, fp y)
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{
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// Multiply 32-bit parts of significands.
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uint64_t mask = (1ULL << 32) - 1;
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uint64_t a = x.f >> 32, b = x.f & mask;
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uint64_t c = y.f >> 32, d = y.f & mask;
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uint64_t ac = a * c, bc = b * c, ad = a * d, bd = b * d;
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// Compute mid 64-bit of result and round.
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uint64_t mid = (bd >> 32) + (ad & mask) + (bc & mask) + (1U << 31);
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return fp(ac + (ad >> 32) + (bc >> 32) + (mid >> 32), x.e + y.e + 64);
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}
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FMT_FUNC fp get_cached_power(int min_exponent, int &pow10_exponent)
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{
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const double one_over_log2_10 = 0.30102999566398114; // 1 / log2(10)
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int index = static_cast<int>(std::ceil((min_exponent + fp::significand_size - 1) * one_over_log2_10));
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// Decimal exponent of the first (smallest) cached power of 10.
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const int first_dec_exp = -348;
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// Difference between two consecutive decimal exponents in cached powers of 10.
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const int dec_exp_step = 8;
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index = (index - first_dec_exp - 1) / dec_exp_step + 1;
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pow10_exponent = first_dec_exp + index * dec_exp_step;
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return fp(data::POW10_SIGNIFICANDS[index], data::POW10_EXPONENTS[index]);
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}
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} // namespace internal
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#if FMT_USE_WINDOWS_H
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FMT_FUNC internal::utf8_to_utf16::utf8_to_utf16(string_view s)
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{
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static const char ERROR_MSG[] = "cannot convert string from UTF-8 to UTF-16";
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if (s.size() > INT_MAX)
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FMT_THROW(windows_error(ERROR_INVALID_PARAMETER, ERROR_MSG));
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int s_size = static_cast<int>(s.size());
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if (s_size == 0)
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{
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// MultiByteToWideChar does not support zero length, handle separately.
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buffer_.resize(1);
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buffer_[0] = 0;
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return;
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}
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int length = MultiByteToWideChar(CP_UTF8, MB_ERR_INVALID_CHARS, s.data(), s_size, FMT_NULL, 0);
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if (length == 0)
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FMT_THROW(windows_error(GetLastError(), ERROR_MSG));
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buffer_.resize(length + 1);
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length = MultiByteToWideChar(CP_UTF8, MB_ERR_INVALID_CHARS, s.data(), s_size, &buffer_[0], length);
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if (length == 0)
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FMT_THROW(windows_error(GetLastError(), ERROR_MSG));
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buffer_[length] = 0;
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}
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FMT_FUNC internal::utf16_to_utf8::utf16_to_utf8(wstring_view s)
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{
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if (int error_code = convert(s))
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{
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FMT_THROW(windows_error(error_code, "cannot convert string from UTF-16 to UTF-8"));
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}
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}
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FMT_FUNC int internal::utf16_to_utf8::convert(wstring_view s)
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{
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if (s.size() > INT_MAX)
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return ERROR_INVALID_PARAMETER;
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int s_size = static_cast<int>(s.size());
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if (s_size == 0)
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{
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// WideCharToMultiByte does not support zero length, handle separately.
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buffer_.resize(1);
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buffer_[0] = 0;
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return 0;
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}
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int length = WideCharToMultiByte(CP_UTF8, 0, s.data(), s_size, FMT_NULL, 0, FMT_NULL, FMT_NULL);
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if (length == 0)
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return GetLastError();
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buffer_.resize(length + 1);
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length = WideCharToMultiByte(CP_UTF8, 0, s.data(), s_size, &buffer_[0], length, FMT_NULL, FMT_NULL);
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if (length == 0)
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return GetLastError();
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buffer_[length] = 0;
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return 0;
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}
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FMT_FUNC void windows_error::init(int err_code, string_view format_str, format_args args)
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{
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error_code_ = err_code;
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memory_buffer buffer;
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internal::format_windows_error(buffer, err_code, vformat(format_str, args));
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std::runtime_error &base = *this;
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base = std::runtime_error(to_string(buffer));
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}
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FMT_FUNC void internal::format_windows_error(internal::buffer &out, int error_code, string_view message) FMT_NOEXCEPT
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{
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FMT_TRY
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{
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wmemory_buffer buf;
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buf.resize(inline_buffer_size);
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for (;;)
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{
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wchar_t *system_message = &buf[0];
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int result = FormatMessageW(FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_IGNORE_INSERTS, FMT_NULL, error_code,
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MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), system_message, static_cast<uint32_t>(buf.size()), FMT_NULL);
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if (result != 0)
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{
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utf16_to_utf8 utf8_message;
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if (utf8_message.convert(system_message) == ERROR_SUCCESS)
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|
{
|
|
writer w(out);
|
|
w.write(message);
|
|
w.write(": ");
|
|
w.write(utf8_message);
|
|
return;
|
|
}
|
|
break;
|
|
}
|
|
if (GetLastError() != ERROR_INSUFFICIENT_BUFFER)
|
|
break; // Can't get error message, report error code instead.
|
|
buf.resize(buf.size() * 2);
|
|
}
|
|
}
|
|
FMT_CATCH(...) {}
|
|
format_error_code(out, error_code, message);
|
|
}
|
|
|
|
#endif // FMT_USE_WINDOWS_H
|
|
|
|
FMT_FUNC void format_system_error(internal::buffer &out, int error_code, string_view message) FMT_NOEXCEPT
|
|
{
|
|
FMT_TRY
|
|
{
|
|
memory_buffer buf;
|
|
buf.resize(inline_buffer_size);
|
|
for (;;)
|
|
{
|
|
char *system_message = &buf[0];
|
|
int result = safe_strerror(error_code, system_message, buf.size());
|
|
if (result == 0)
|
|
{
|
|
writer w(out);
|
|
w.write(message);
|
|
w.write(": ");
|
|
w.write(system_message);
|
|
return;
|
|
}
|
|
if (result != ERANGE)
|
|
break; // Can't get error message, report error code instead.
|
|
buf.resize(buf.size() * 2);
|
|
}
|
|
}
|
|
FMT_CATCH(...) {}
|
|
format_error_code(out, error_code, message);
|
|
}
|
|
|
|
template<typename Char>
|
|
void basic_fixed_buffer<Char>::grow(std::size_t)
|
|
{
|
|
FMT_THROW(std::runtime_error("buffer overflow"));
|
|
}
|
|
|
|
FMT_FUNC void internal::error_handler::on_error(const char *message)
|
|
{
|
|
FMT_THROW(format_error(message));
|
|
}
|
|
|
|
FMT_FUNC void report_system_error(int error_code, fmt::string_view message) FMT_NOEXCEPT
|
|
{
|
|
report_error(format_system_error, error_code, message);
|
|
}
|
|
|
|
#if FMT_USE_WINDOWS_H
|
|
FMT_FUNC void report_windows_error(int error_code, fmt::string_view message) FMT_NOEXCEPT
|
|
{
|
|
report_error(internal::format_windows_error, error_code, message);
|
|
}
|
|
#endif
|
|
|
|
FMT_FUNC void vprint(std::FILE *f, string_view format_str, format_args args)
|
|
{
|
|
memory_buffer buffer;
|
|
vformat_to(buffer, format_str, args);
|
|
std::fwrite(buffer.data(), 1, buffer.size(), f);
|
|
}
|
|
|
|
FMT_FUNC void vprint(std::FILE *f, wstring_view format_str, wformat_args args)
|
|
{
|
|
wmemory_buffer buffer;
|
|
vformat_to(buffer, format_str, args);
|
|
std::fwrite(buffer.data(), sizeof(wchar_t), buffer.size(), f);
|
|
}
|
|
|
|
FMT_FUNC void vprint(string_view format_str, format_args args)
|
|
{
|
|
vprint(stdout, format_str, args);
|
|
}
|
|
|
|
FMT_FUNC void vprint(wstring_view format_str, wformat_args args)
|
|
{
|
|
vprint(stdout, format_str, args);
|
|
}
|
|
|
|
FMT_FUNC void vprint_colored(color c, string_view format, format_args args)
|
|
{
|
|
char escape[] = "\x1b[30m";
|
|
escape[3] = static_cast<char>('0' + c);
|
|
std::fputs(escape, stdout);
|
|
vprint(format, args);
|
|
std::fputs(RESET_COLOR, stdout);
|
|
}
|
|
|
|
FMT_FUNC void vprint_colored(color c, wstring_view format, wformat_args args)
|
|
{
|
|
wchar_t escape[] = L"\x1b[30m";
|
|
escape[3] = static_cast<wchar_t>('0' + c);
|
|
std::fputws(escape, stdout);
|
|
vprint(format, args);
|
|
std::fputws(WRESET_COLOR, stdout);
|
|
}
|
|
|
|
FMT_FUNC locale locale_provider::locale()
|
|
{
|
|
return fmt::locale();
|
|
}
|
|
|
|
FMT_END_NAMESPACE
|
|
|
|
#ifdef _MSC_VER
|
|
#pragma warning(pop)
|
|
#endif
|
|
|
|
#endif // FMT_FORMAT_INL_H_
|