557 lines
18 KiB
C++
557 lines
18 KiB
C++
/*
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Formatting library for C++
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Copyright (c) 2012 - 2016, Victor Zverovich
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All rights reserved.
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions are met:
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1. Redistributions of source code must retain the above copyright notice, this
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list of conditions and the following disclaimer.
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2. Redistributions in binary form must reproduce the above copyright notice,
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this list of conditions and the following disclaimer in the documentation
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and/or other materials provided with the distribution.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
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ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
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ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "fmt/format.h"
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#include "fmt/printf.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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#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(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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using fmt::internal::Arg;
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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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static inline fmt::internal::Null<> strerror_r(int, char *, ...) {
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return fmt::internal::Null<>();
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}
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static inline fmt::internal::Null<> strerror_s(char *, std::size_t, ...) {
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return fmt::internal::Null<>();
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}
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namespace fmt {
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FMT_FUNC internal::RuntimeError::~RuntimeError() throw() {}
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FMT_FUNC FormatError::~FormatError() throw() {}
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FMT_FUNC SystemError::~SystemError() throw() {}
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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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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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typedef void (*FormatFunc)(Writer &, int, StringRef);
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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(
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int error_code, char *&buffer, std::size_t buffer_size) FMT_NOEXCEPT {
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FMT_ASSERT(buffer != 0 && buffer_size != 0, "invalid buffer");
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class StrError {
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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 StrError &) {}
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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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// 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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// 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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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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// If the buffer is full then the message is probably truncated.
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return result == 0 && strlen(buffer_) == buffer_size_ - 1 ?
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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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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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StrError(int err_code, char *&buf, std::size_t buf_size)
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: error_code_(err_code), buffer_(buf), buffer_size_(buf_size) {}
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int run() {
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strerror_r(0, 0, ""); // Suppress a warning about unused strerror_r.
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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 StrError(error_code, buffer, buffer_size).run();
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}
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void format_error_code(Writer &out, int error_code,
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StringRef message) FMT_NOEXCEPT {
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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.clear();
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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::IntTraits<int>::MainType MainType;
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MainType abs_value = static_cast<MainType>(error_code);
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if (internal::is_negative(error_code)) {
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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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if (message.size() <= internal::INLINE_BUFFER_SIZE - error_code_size)
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out << message << SEP;
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out << ERROR_STR << error_code;
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assert(out.size() <= internal::INLINE_BUFFER_SIZE);
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}
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void report_error(FormatFunc func, int error_code,
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StringRef message) FMT_NOEXCEPT {
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MemoryWriter 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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namespace internal {
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// This method is used to preserve binary compatibility with fmt 3.0.
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// It can be removed in 4.0.
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FMT_FUNC void format_system_error(
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Writer &out, int error_code, StringRef message) FMT_NOEXCEPT {
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fmt::format_system_error(out, error_code, message);
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}
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} // namespace internal
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FMT_FUNC void SystemError::init(
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int err_code, CStringRef format_str, ArgList args) {
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error_code_ = err_code;
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MemoryWriter w;
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format_system_error(w, err_code, format(format_str, args));
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std::runtime_error &base = *this;
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base = std::runtime_error(w.str());
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}
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template <typename T>
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int internal::CharTraits<char>::format_float(
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char *buffer, std::size_t size, const char *format,
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unsigned width, int precision, T value) {
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if (width == 0) {
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return precision < 0 ?
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FMT_SNPRINTF(buffer, size, format, value) :
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FMT_SNPRINTF(buffer, size, format, precision, value);
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}
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return precision < 0 ?
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FMT_SNPRINTF(buffer, size, format, width, value) :
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FMT_SNPRINTF(buffer, size, format, width, precision, value);
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}
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template <typename T>
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int internal::CharTraits<wchar_t>::format_float(
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wchar_t *buffer, std::size_t size, const wchar_t *format,
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unsigned width, int precision, T value) {
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if (width == 0) {
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return precision < 0 ?
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FMT_SWPRINTF(buffer, size, format, value) :
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FMT_SWPRINTF(buffer, size, format, precision, value);
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}
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return precision < 0 ?
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FMT_SWPRINTF(buffer, size, format, width, value) :
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FMT_SWPRINTF(buffer, size, format, width, precision, value);
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}
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template <typename T>
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const char internal::BasicData<T>::DIGITS[] =
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"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, \
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factor * 100, \
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factor * 1000, \
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factor * 10000, \
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factor * 100000, \
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factor * 1000000, \
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factor * 10000000, \
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factor * 100000000, \
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factor * 1000000000
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template <typename T>
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const uint32_t internal::BasicData<T>::POWERS_OF_10_32[] = {
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0, FMT_POWERS_OF_10(1)
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};
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template <typename T>
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const uint64_t internal::BasicData<T>::POWERS_OF_10_64[] = {
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0,
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FMT_POWERS_OF_10(1),
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FMT_POWERS_OF_10(ULongLong(1000000000)),
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// Multiply several constants instead of using a single long long constant
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// to avoid warnings about C++98 not supporting long long.
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ULongLong(1000000000) * ULongLong(1000000000) * 10
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};
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FMT_FUNC void internal::report_unknown_type(char code, const char *type) {
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(void)type;
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if (std::isprint(static_cast<unsigned char>(code))) {
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FMT_THROW(FormatError(
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format("unknown format code '{}' for {}", code, type)));
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}
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FMT_THROW(FormatError(
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format("unknown format code '\\x{:02x}' for {}",
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static_cast<unsigned>(code), type)));
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}
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#if FMT_USE_WINDOWS_H
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FMT_FUNC internal::UTF8ToUTF16::UTF8ToUTF16(StringRef s) {
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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(WindowsError(ERROR_INVALID_PARAMETER, ERROR_MSG));
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int s_size = static_cast<int>(s.size());
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int length = MultiByteToWideChar(
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CP_UTF8, MB_ERR_INVALID_CHARS, s.data(), s_size, 0, 0);
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if (length == 0)
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FMT_THROW(WindowsError(GetLastError(), ERROR_MSG));
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buffer_.resize(length + 1);
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length = MultiByteToWideChar(
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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(WindowsError(GetLastError(), ERROR_MSG));
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buffer_[length] = 0;
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}
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FMT_FUNC internal::UTF16ToUTF8::UTF16ToUTF8(WStringRef s) {
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if (int error_code = convert(s)) {
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FMT_THROW(WindowsError(error_code,
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"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::UTF16ToUTF8::convert(WStringRef s) {
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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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int length = WideCharToMultiByte(CP_UTF8, 0, s.data(), s_size, 0, 0, 0, 0);
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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(
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CP_UTF8, 0, s.data(), s_size, &buffer_[0], length, 0, 0);
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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 WindowsError::init(
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int err_code, CStringRef format_str, ArgList args) {
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error_code_ = err_code;
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MemoryWriter w;
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internal::format_windows_error(w, err_code, format(format_str, args));
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std::runtime_error &base = *this;
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base = std::runtime_error(w.str());
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}
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FMT_FUNC void internal::format_windows_error(
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Writer &out, int error_code, StringRef message) FMT_NOEXCEPT {
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FMT_TRY {
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MemoryBuffer<wchar_t, INLINE_BUFFER_SIZE> buffer;
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buffer.resize(INLINE_BUFFER_SIZE);
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for (;;) {
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wchar_t *system_message = &buffer[0];
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int result = FormatMessageW(FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_IGNORE_INSERTS,
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0, error_code, MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
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system_message, static_cast<uint32_t>(buffer.size()), 0);
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if (result != 0) {
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UTF16ToUTF8 utf8_message;
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if (utf8_message.convert(system_message) == ERROR_SUCCESS) {
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out << message << ": " << utf8_message;
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return;
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}
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break;
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}
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if (GetLastError() != ERROR_INSUFFICIENT_BUFFER)
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break; // Can't get error message, report error code instead.
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buffer.resize(buffer.size() * 2);
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}
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} FMT_CATCH(...) {}
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fmt::format_error_code(out, error_code, message); // 'fmt::' is for bcc32.
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}
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#endif // FMT_USE_WINDOWS_H
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FMT_FUNC void format_system_error(
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Writer &out, int error_code, StringRef message) FMT_NOEXCEPT {
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FMT_TRY {
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internal::MemoryBuffer<char, internal::INLINE_BUFFER_SIZE> buffer;
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buffer.resize(internal::INLINE_BUFFER_SIZE);
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for (;;) {
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char *system_message = &buffer[0];
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int result = safe_strerror(error_code, system_message, buffer.size());
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if (result == 0) {
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out << message << ": " << system_message;
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return;
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}
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if (result != ERANGE)
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break; // Can't get error message, report error code instead.
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buffer.resize(buffer.size() * 2);
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}
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} FMT_CATCH(...) {}
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fmt::format_error_code(out, error_code, message); // 'fmt::' is for bcc32.
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}
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template <typename Char>
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void internal::ArgMap<Char>::init(const ArgList &args) {
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if (!map_.empty())
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return;
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typedef internal::NamedArg<Char> NamedArg;
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const NamedArg *named_arg = 0;
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bool use_values =
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args.type(ArgList::MAX_PACKED_ARGS - 1) == internal::Arg::NONE;
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if (use_values) {
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for (unsigned i = 0;/*nothing*/; ++i) {
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internal::Arg::Type arg_type = args.type(i);
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switch (arg_type) {
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case internal::Arg::NONE:
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return;
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case internal::Arg::NAMED_ARG:
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named_arg = static_cast<const NamedArg*>(args.values_[i].pointer);
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map_.push_back(Pair(named_arg->name, *named_arg));
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break;
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default:
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/*nothing*/;
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}
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}
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return;
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}
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for (unsigned i = 0; i != ArgList::MAX_PACKED_ARGS; ++i) {
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internal::Arg::Type arg_type = args.type(i);
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if (arg_type == internal::Arg::NAMED_ARG) {
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named_arg = static_cast<const NamedArg*>(args.args_[i].pointer);
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map_.push_back(Pair(named_arg->name, *named_arg));
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}
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}
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for (unsigned i = ArgList::MAX_PACKED_ARGS;/*nothing*/; ++i) {
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switch (args.args_[i].type) {
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case internal::Arg::NONE:
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return;
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case internal::Arg::NAMED_ARG:
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named_arg = static_cast<const NamedArg*>(args.args_[i].pointer);
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map_.push_back(Pair(named_arg->name, *named_arg));
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break;
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default:
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/*nothing*/;
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}
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}
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}
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template <typename Char>
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void internal::FixedBuffer<Char>::grow(std::size_t) {
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FMT_THROW(std::runtime_error("buffer overflow"));
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}
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FMT_FUNC Arg internal::FormatterBase::do_get_arg(
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unsigned arg_index, const char *&error) {
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Arg arg = args_[arg_index];
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switch (arg.type) {
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case Arg::NONE:
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error = "argument index out of range";
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break;
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case Arg::NAMED_ARG:
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arg = *static_cast<const internal::Arg*>(arg.pointer);
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break;
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default:
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/*nothing*/;
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}
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return arg;
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}
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FMT_FUNC void report_system_error(
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int error_code, fmt::StringRef message) FMT_NOEXCEPT {
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// 'fmt::' is for bcc32.
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report_error(format_system_error, error_code, message);
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}
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#if FMT_USE_WINDOWS_H
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FMT_FUNC void report_windows_error(
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int error_code, fmt::StringRef message) FMT_NOEXCEPT {
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// 'fmt::' is for bcc32.
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report_error(internal::format_windows_error, error_code, message);
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}
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#endif
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|
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FMT_FUNC void print(std::FILE *f, CStringRef format_str, ArgList args) {
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MemoryWriter w;
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|
w.write(format_str, args);
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|
std::fwrite(w.data(), 1, w.size(), f);
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|
}
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|
|
|
FMT_FUNC void print(CStringRef format_str, ArgList args) {
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|
print(stdout, format_str, args);
|
|
}
|
|
|
|
FMT_FUNC void print_colored(Color c, CStringRef format, ArgList args) {
|
|
char escape[] = "\x1b[30m";
|
|
escape[3] = static_cast<char>('0' + c);
|
|
std::fputs(escape, stdout);
|
|
print(format, args);
|
|
std::fputs(RESET_COLOR, stdout);
|
|
}
|
|
|
|
template <typename Char>
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|
void printf(BasicWriter<Char> &w, BasicCStringRef<Char> format, ArgList args);
|
|
|
|
FMT_FUNC int fprintf(std::FILE *f, CStringRef format, ArgList args) {
|
|
MemoryWriter w;
|
|
printf(w, format, args);
|
|
std::size_t size = w.size();
|
|
return std::fwrite(w.data(), 1, size, f) < size ? -1 : static_cast<int>(size);
|
|
}
|
|
|
|
#ifndef FMT_HEADER_ONLY
|
|
|
|
template struct internal::BasicData<void>;
|
|
|
|
// Explicit instantiations for char.
|
|
|
|
template void internal::FixedBuffer<char>::grow(std::size_t);
|
|
|
|
template void internal::ArgMap<char>::init(const ArgList &args);
|
|
|
|
template void PrintfFormatter<char>::format(CStringRef format);
|
|
|
|
template int internal::CharTraits<char>::format_float(
|
|
char *buffer, std::size_t size, const char *format,
|
|
unsigned width, int precision, double value);
|
|
|
|
template int internal::CharTraits<char>::format_float(
|
|
char *buffer, std::size_t size, const char *format,
|
|
unsigned width, int precision, long double value);
|
|
|
|
// Explicit instantiations for wchar_t.
|
|
|
|
template void internal::FixedBuffer<wchar_t>::grow(std::size_t);
|
|
|
|
template void internal::ArgMap<wchar_t>::init(const ArgList &args);
|
|
|
|
template void PrintfFormatter<wchar_t>::format(WCStringRef format);
|
|
|
|
template int internal::CharTraits<wchar_t>::format_float(
|
|
wchar_t *buffer, std::size_t size, const wchar_t *format,
|
|
unsigned width, int precision, double value);
|
|
|
|
template int internal::CharTraits<wchar_t>::format_float(
|
|
wchar_t *buffer, std::size_t size, const wchar_t *format,
|
|
unsigned width, int precision, long double value);
|
|
|
|
#endif // FMT_HEADER_ONLY
|
|
|
|
} // namespace fmt
|
|
|
|
#ifdef _MSC_VER
|
|
# pragma warning(pop)
|
|
#endif
|