diff --git a/include/rb/format.h b/include/rb/format.h
new file mode 100644
index 000000000..4a992a223
--- /dev/null
+++ b/include/rb/format.h
@@ -0,0 +1,4323 @@
+/*
+ Formatting library for C++
+
+ Copyright (c) 2012 - 2016, Victor Zverovich
+ All rights reserved.
+
+ Redistribution and use in source and binary forms, with or without
+ modification, are permitted provided that the following conditions are met:
+
+ 1. Redistributions of source code must retain the above copyright notice, this
+ list of conditions and the following disclaimer.
+ 2. Redistributions in binary form must reproduce the above copyright notice,
+ this list of conditions and the following disclaimer in the documentation
+ and/or other materials provided with the distribution.
+
+ THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
+ ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
+ ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+ ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#pragma once
+#define HAVE_RB_FORMAT_H
+
+#include <cassert>
+#include <clocale>
+#include <cmath>
+#include <cstdio>
+#include <cstring>
+#include <limits>
+#include <memory>
+#include <stdexcept>
+#include <string>
+#include <vector>
+#include <utility>
+
+#ifdef _SECURE_SCL
+# define FMT_SECURE_SCL _SECURE_SCL
+#else
+# define FMT_SECURE_SCL 0
+#endif
+
+#if FMT_SECURE_SCL
+# include <iterator>
+#endif
+
+#ifdef _MSC_VER
+# define FMT_MSC_VER _MSC_VER
+#else
+# define FMT_MSC_VER 0
+#endif
+
+#if FMT_MSC_VER && FMT_MSC_VER <= 1500
+typedef unsigned __int32 uint32_t;
+typedef unsigned __int64 uint64_t;
+typedef __int64 intmax_t;
+#else
+#include <stdint.h>
+#endif
+
+#if !defined(FMT_HEADER_ONLY) && defined(_WIN32)
+# ifdef FMT_EXPORT
+# define FMT_API __declspec(dllexport)
+# elif defined(FMT_SHARED)
+# define FMT_API __declspec(dllimport)
+# endif
+#endif
+#ifndef FMT_API
+# define FMT_API
+#endif
+
+#ifdef __GNUC__
+# define FMT_GCC_VERSION (__GNUC__ * 100 + __GNUC_MINOR__)
+# define FMT_GCC_EXTENSION __extension__
+# if FMT_GCC_VERSION >= 406
+# pragma GCC diagnostic push
+// Disable the warning about "long long" which is sometimes reported even
+// when using __extension__.
+# pragma GCC diagnostic ignored "-Wlong-long"
+// Disable the warning about declaration shadowing because it affects too
+// many valid cases.
+# pragma GCC diagnostic ignored "-Wshadow"
+// Disable the warning about implicit conversions that may change the sign of
+// an integer; silencing it otherwise would require many explicit casts.
+# pragma GCC diagnostic ignored "-Wsign-conversion"
+# endif
+# if __cplusplus >= 201103L || defined __GXX_EXPERIMENTAL_CXX0X__
+# define FMT_HAS_GXX_CXX11 1
+# endif
+#else
+# define FMT_GCC_EXTENSION
+#endif
+
+#if defined(__INTEL_COMPILER)
+# define FMT_ICC_VERSION __INTEL_COMPILER
+#elif defined(__ICL)
+# define FMT_ICC_VERSION __ICL
+#endif
+
+#if defined(__clang__) && !defined(FMT_ICC_VERSION)
+# pragma clang diagnostic push
+# pragma clang diagnostic ignored "-Wdocumentation-unknown-command"
+# pragma clang diagnostic ignored "-Wpadded"
+#endif
+
+#ifdef __GNUC_LIBSTD__
+# define FMT_GNUC_LIBSTD_VERSION (__GNUC_LIBSTD__ * 100 + __GNUC_LIBSTD_MINOR__)
+#endif
+
+#ifdef __has_feature
+# define FMT_HAS_FEATURE(x) __has_feature(x)
+#else
+# define FMT_HAS_FEATURE(x) 0
+#endif
+
+#ifdef __has_builtin
+# define FMT_HAS_BUILTIN(x) __has_builtin(x)
+#else
+# define FMT_HAS_BUILTIN(x) 0
+#endif
+
+#ifdef __has_cpp_attribute
+# define FMT_HAS_CPP_ATTRIBUTE(x) __has_cpp_attribute(x)
+#else
+# define FMT_HAS_CPP_ATTRIBUTE(x) 0
+#endif
+
+#ifndef FMT_USE_VARIADIC_TEMPLATES
+// Variadic templates are available in GCC since version 4.4
+// (http://gcc.gnu.org/projects/cxx0x.html) and in Visual C++
+// since version 2013.
+# define FMT_USE_VARIADIC_TEMPLATES \
+ (FMT_HAS_FEATURE(cxx_variadic_templates) || \
+ (FMT_GCC_VERSION >= 404 && FMT_HAS_GXX_CXX11) || FMT_MSC_VER >= 1800)
+#endif
+
+#ifndef FMT_USE_RVALUE_REFERENCES
+// Don't use rvalue references when compiling with clang and an old libstdc++
+// as the latter doesn't provide std::move.
+# if defined(FMT_GNUC_LIBSTD_VERSION) && FMT_GNUC_LIBSTD_VERSION <= 402
+# define FMT_USE_RVALUE_REFERENCES 0
+# else
+# define FMT_USE_RVALUE_REFERENCES \
+ (FMT_HAS_FEATURE(cxx_rvalue_references) || \
+ (FMT_GCC_VERSION >= 403 && FMT_HAS_GXX_CXX11) || FMT_MSC_VER >= 1600)
+# endif
+#endif
+
+#if FMT_USE_RVALUE_REFERENCES
+# include <utility> // for std::move
+#endif
+
+// Check if exceptions are disabled.
+#if defined(__GNUC__) && !defined(__EXCEPTIONS)
+# define FMT_EXCEPTIONS 0
+#endif
+#if FMT_MSC_VER && !_HAS_EXCEPTIONS
+# define FMT_EXCEPTIONS 0
+#endif
+#ifndef FMT_EXCEPTIONS
+# define FMT_EXCEPTIONS 1
+#endif
+
+#ifndef FMT_THROW
+# if FMT_EXCEPTIONS
+# define FMT_THROW(x) throw x
+# else
+# define FMT_THROW(x) assert(false)
+# endif
+#endif
+
+// Define FMT_USE_NOEXCEPT to make fmt use noexcept (C++11 feature).
+#ifndef FMT_USE_NOEXCEPT
+# define FMT_USE_NOEXCEPT 0
+#endif
+
+#ifndef FMT_NOEXCEPT
+# if FMT_EXCEPTIONS
+# if FMT_USE_NOEXCEPT || FMT_HAS_FEATURE(cxx_noexcept) || \
+ (FMT_GCC_VERSION >= 408 && FMT_HAS_GXX_CXX11) || \
+ FMT_MSC_VER >= 1900
+# define FMT_NOEXCEPT noexcept
+# else
+# define FMT_NOEXCEPT throw()
+# endif
+# else
+# define FMT_NOEXCEPT
+# endif
+#endif
+
+// A macro to disallow the copy constructor and operator= functions
+// This should be used in the private: declarations for a class
+#ifndef FMT_USE_DELETED_FUNCTIONS
+# define FMT_USE_DELETED_FUNCTIONS 0
+#endif
+
+#if FMT_USE_DELETED_FUNCTIONS || FMT_HAS_FEATURE(cxx_deleted_functions) || \
+ (FMT_GCC_VERSION >= 404 && FMT_HAS_GXX_CXX11) || FMT_MSC_VER >= 1800
+# define FMT_DELETED_OR_UNDEFINED = delete
+# define FMT_DISALLOW_COPY_AND_ASSIGN(TypeName) \
+ TypeName(const TypeName&) = delete; \
+ TypeName& operator=(const TypeName&) = delete
+#else
+# define FMT_DELETED_OR_UNDEFINED
+# define FMT_DISALLOW_COPY_AND_ASSIGN(TypeName) \
+ TypeName(const TypeName&); \
+ TypeName& operator=(const TypeName&)
+#endif
+
+#ifndef FMT_USE_USER_DEFINED_LITERALS
+// All compilers which support UDLs also support variadic templates. This
+// makes the fmt::literals implementation easier. However, an explicit check
+// for variadic templates is added here just in case.
+// For Intel's compiler both it and the system gcc/msc must support UDLs.
+# define FMT_USE_USER_DEFINED_LITERALS \
+ FMT_USE_VARIADIC_TEMPLATES && FMT_USE_RVALUE_REFERENCES && \
+ (FMT_HAS_FEATURE(cxx_user_literals) || \
+ (FMT_GCC_VERSION >= 407 && FMT_HAS_GXX_CXX11) || FMT_MSC_VER >= 1900) && \
+ (!defined(FMT_ICC_VERSION) || FMT_ICC_VERSION >= 1500)
+#endif
+
+#ifndef FMT_ASSERT
+# define FMT_ASSERT(condition, message) assert((condition) && message)
+#endif
+
+#if FMT_GCC_VERSION >= 400 || FMT_HAS_BUILTIN(__builtin_clz)
+# define FMT_BUILTIN_CLZ(n) __builtin_clz(n)
+#endif
+
+#if FMT_GCC_VERSION >= 400 || FMT_HAS_BUILTIN(__builtin_clzll)
+# define FMT_BUILTIN_CLZLL(n) __builtin_clzll(n)
+#endif
+
+// Some compilers masquerade as both MSVC and GCC-likes or
+// otherwise support __builtin_clz and __builtin_clzll, so
+// only define FMT_BUILTIN_CLZ using the MSVC intrinsics
+// if the clz and clzll builtins are not available.
+#if FMT_MSC_VER && !defined(FMT_BUILTIN_CLZLL)
+# include <intrin.h> // _BitScanReverse, _BitScanReverse64
+
+namespace fmt {
+namespace internal {
+# pragma intrinsic(_BitScanReverse)
+inline uint32_t clz(uint32_t x) {
+ unsigned long r = 0;
+ _BitScanReverse(&r, x);
+
+ assert(x != 0);
+ // Static analysis complains about using uninitialized data
+ // "r", but the only way that can happen is if "x" is 0,
+ // which the callers guarantee to not happen.
+# pragma warning(suppress: 6102)
+ return 31 - r;
+}
+# define FMT_BUILTIN_CLZ(n) fmt::internal::clz(n)
+
+# ifdef _WIN64
+# pragma intrinsic(_BitScanReverse64)
+# endif
+
+inline uint32_t clzll(uint64_t x) {
+ unsigned long r = 0;
+# ifdef _WIN64
+ _BitScanReverse64(&r, x);
+# else
+ // Scan the high 32 bits.
+ if (_BitScanReverse(&r, static_cast<uint32_t>(x >> 32)))
+ return 63 - (r + 32);
+
+ // Scan the low 32 bits.
+ _BitScanReverse(&r, static_cast<uint32_t>(x));
+# endif
+
+ assert(x != 0);
+ // Static analysis complains about using uninitialized data
+ // "r", but the only way that can happen is if "x" is 0,
+ // which the callers guarantee to not happen.
+# pragma warning(suppress: 6102)
+ return 63 - r;
+}
+# define FMT_BUILTIN_CLZLL(n) fmt::internal::clzll(n)
+}
+}
+#endif
+
+namespace fmt {
+namespace internal {
+struct DummyInt {
+ int data[2];
+ operator int() const { return 0; }
+};
+typedef std::numeric_limits<fmt::internal::DummyInt> FPUtil;
+
+// Dummy implementations of system functions such as signbit and ecvt called
+// if the latter are not available.
+inline DummyInt signbit(...) { return DummyInt(); }
+inline DummyInt _ecvt_s(...) { return DummyInt(); }
+inline DummyInt isinf(...) { return DummyInt(); }
+inline DummyInt _finite(...) { return DummyInt(); }
+inline DummyInt isnan(...) { return DummyInt(); }
+inline DummyInt _isnan(...) { return DummyInt(); }
+
+// A helper function to suppress bogus "conditional expression is constant"
+// warnings.
+template <typename T>
+inline T const_check(T value) { return value; }
+}
+} // namespace fmt
+
+namespace std {
+// Standard permits specialization of std::numeric_limits. This specialization
+// is used to resolve ambiguity between isinf and std::isinf in glibc:
+// https://gcc.gnu.org/bugzilla/show_bug.cgi?id=48891
+// and the same for isnan and signbit.
+template <>
+class numeric_limits<fmt::internal::DummyInt> :
+ public std::numeric_limits<int> {
+ public:
+ // Portable version of isinf.
+ template <typename T>
+ static bool isinfinity(T x) {
+ using namespace fmt::internal;
+ // The resolution "priority" is:
+ // isinf macro > std::isinf > ::isinf > fmt::internal::isinf
+ if (const_check(sizeof(isinf(x)) == sizeof(bool) ||
+ sizeof(isinf(x)) == sizeof(int))) {
+ return isinf(x) != 0;
+ }
+ return !_finite(static_cast<double>(x));
+ }
+
+ // Portable version of isnan.
+ template <typename T>
+ static bool isnotanumber(T x) {
+ using namespace fmt::internal;
+ if (const_check(sizeof(isnan(x)) == sizeof(bool) ||
+ sizeof(isnan(x)) == sizeof(int))) {
+ return isnan(x) != 0;
+ }
+ return _isnan(static_cast<double>(x)) != 0;
+ }
+
+ // Portable version of signbit.
+ static bool isnegative(double x) {
+ using namespace fmt::internal;
+ if (const_check(sizeof(signbit(x)) == sizeof(int)))
+ return signbit(x) != 0;
+ if (x < 0) return true;
+ if (!isnotanumber(x)) return false;
+ int dec = 0, sign = 0;
+ char buffer[2]; // The buffer size must be >= 2 or _ecvt_s will fail.
+ _ecvt_s(buffer, sizeof(buffer), x, 0, &dec, &sign);
+ return sign != 0;
+ }
+};
+} // namespace std
+
+namespace fmt {
+
+// Fix the warning about long long on older versions of GCC
+// that don't support the diagnostic pragma.
+FMT_GCC_EXTENSION typedef long long LongLong;
+FMT_GCC_EXTENSION typedef unsigned long long ULongLong;
+
+#if FMT_USE_RVALUE_REFERENCES
+using std::move;
+#endif
+
+template <typename Char>
+class BasicWriter;
+
+typedef BasicWriter<char> Writer;
+typedef BasicWriter<wchar_t> WWriter;
+
+template <typename Char>
+class ArgFormatter;
+
+template <typename Impl, typename Char>
+class BasicPrintfArgFormatter;
+
+template <typename CharType,
+ typename ArgFormatter = fmt::ArgFormatter<CharType> >
+class BasicFormatter;
+
+/**
+ \rst
+ A string reference. It can be constructed from a C string or ``std::string``.
+
+ You can use one of the following typedefs for common character types:
+
+ +------------+-------------------------+
+ | Type | Definition |
+ +============+=========================+
+ | StringRef | BasicStringRef<char> |
+ +------------+-------------------------+
+ | WStringRef | BasicStringRef<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(StringRef format_str, const Args & ... args);
+
+ format("{}", 42);
+ format(std::string("{}"), 42);
+ \endrst
+ */
+template <typename Char>
+class BasicStringRef {
+ private:
+ const Char *data_;
+ std::size_t size_;
+
+ public:
+ /** Constructs a string reference object from a C string and a size. */
+ BasicStringRef(const Char *s, std::size_t size) : data_(s), size_(size) {}
+
+ /**
+ \rst
+ Constructs a string reference object from a C string computing
+ the size with ``std::char_traits<Char>::length``.
+ \endrst
+ */
+ BasicStringRef(const Char *s)
+ : data_(s), size_(std::char_traits<Char>::length(s)) {}
+
+ /**
+ \rst
+ Constructs a string reference from an ``std::string`` object.
+ \endrst
+ */
+ BasicStringRef(const std::basic_string<Char> &s)
+ : data_(s.c_str()), size_(s.size()) {}
+
+ /**
+ \rst
+ Converts a string reference to an ``std::string`` object.
+ \endrst
+ */
+ std::basic_string<Char> to_string() const {
+ return std::basic_string<Char>(data_, size_);
+ }
+
+ /** Returns a pointer to the string data. */
+ const Char *data() const { return data_; }
+
+ /** Returns the string size. */
+ std::size_t size() const { return size_; }
+
+ // Lexicographically compare this string reference to other.
+ int compare(BasicStringRef other) const {
+ std::size_t size = size_ < other.size_ ? size_ : other.size_;
+ int result = std::char_traits<Char>::compare(data_, other.data_, size);
+ if (result == 0)
+ result = size_ == other.size_ ? 0 : (size_ < other.size_ ? -1 : 1);
+ return result;
+ }
+
+ friend bool operator==(BasicStringRef lhs, BasicStringRef rhs) {
+ return lhs.compare(rhs) == 0;
+ }
+ friend bool operator!=(BasicStringRef lhs, BasicStringRef rhs) {
+ return lhs.compare(rhs) != 0;
+ }
+ friend bool operator<(BasicStringRef lhs, BasicStringRef rhs) {
+ return lhs.compare(rhs) < 0;
+ }
+ friend bool operator<=(BasicStringRef lhs, BasicStringRef rhs) {
+ return lhs.compare(rhs) <= 0;
+ }
+ friend bool operator>(BasicStringRef lhs, BasicStringRef rhs) {
+ return lhs.compare(rhs) > 0;
+ }
+ friend bool operator>=(BasicStringRef lhs, BasicStringRef rhs) {
+ return lhs.compare(rhs) >= 0;
+ }
+};
+
+typedef BasicStringRef<char> StringRef;
+typedef BasicStringRef<wchar_t> WStringRef;
+
+/**
+ \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 typedefs for common character types:
+
+ +-------------+--------------------------+
+ | Type | Definition |
+ +=============+==========================+
+ | CStringRef | BasicCStringRef<char> |
+ +-------------+--------------------------+
+ | WCStringRef | BasicCStringRef<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(CStringRef format_str, const Args & ... args);
+
+ format("{}", 42);
+ format(std::string("{}"), 42);
+ \endrst
+ */
+template <typename Char>
+class BasicCStringRef {
+ private:
+ const Char *data_;
+
+ public:
+ /** Constructs a string reference object from a C string. */
+ BasicCStringRef(const Char *s) : data_(s) {}
+
+ /**
+ \rst
+ Constructs a string reference from an ``std::string`` object.
+ \endrst
+ */
+ BasicCStringRef(const std::basic_string<Char> &s) : data_(s.c_str()) {}
+
+ /** Returns the pointer to a C string. */
+ const Char *c_str() const { return data_; }
+};
+
+typedef BasicCStringRef<char> CStringRef;
+typedef BasicCStringRef<wchar_t> WCStringRef;
+
+/** A formatting error such as invalid format string. */
+class FormatError : public std::runtime_error {
+ public:
+ explicit FormatError(CStringRef message)
+ : std::runtime_error(message.c_str()) {}
+ ~FormatError() throw();
+};
+
+namespace internal {
+
+// MakeUnsigned<T>::Type gives an unsigned type corresponding to integer type T.
+template <typename T>
+struct MakeUnsigned { typedef T Type; };
+
+#define FMT_SPECIALIZE_MAKE_UNSIGNED(T, U) \
+ template <> \
+ struct MakeUnsigned<T> { typedef U Type; }
+
+FMT_SPECIALIZE_MAKE_UNSIGNED(char, unsigned char);
+FMT_SPECIALIZE_MAKE_UNSIGNED(signed char, unsigned char);
+FMT_SPECIALIZE_MAKE_UNSIGNED(short, unsigned short);
+FMT_SPECIALIZE_MAKE_UNSIGNED(int, unsigned);
+FMT_SPECIALIZE_MAKE_UNSIGNED(long, unsigned long);
+FMT_SPECIALIZE_MAKE_UNSIGNED(LongLong, ULongLong);
+
+// Casts nonnegative integer to unsigned.
+template <typename Int>
+inline typename MakeUnsigned<Int>::Type to_unsigned(Int value) {
+ FMT_ASSERT(value >= 0, "negative value");
+ return static_cast<typename MakeUnsigned<Int>::Type>(value);
+}
+
+// The number of characters to store in the MemoryBuffer object itself
+// to avoid dynamic memory allocation.
+enum { INLINE_BUFFER_SIZE = 500 };
+
+#if FMT_SECURE_SCL
+// Use checked iterator to avoid warnings on MSVC.
+template <typename T>
+inline stdext::checked_array_iterator<T*> make_ptr(T *ptr, std::size_t size) {
+ return stdext::checked_array_iterator<T*>(ptr, size);
+}
+#else
+template <typename T>
+inline T *make_ptr(T *ptr, std::size_t) { return ptr; }
+#endif
+} // namespace internal
+
+/**
+ \rst
+ A buffer supporting a subset of ``std::vector``'s operations.
+ \endrst
+ */
+template <typename T>
+class Buffer {
+ private:
+ FMT_DISALLOW_COPY_AND_ASSIGN(Buffer);
+
+ protected:
+ T *ptr_;
+ std::size_t size_;
+ std::size_t capacity_;
+
+ Buffer(T *ptr = 0, std::size_t capacity = 0)
+ : ptr_(ptr), size_(0), capacity_(capacity) {}
+
+ /**
+ \rst
+ Increases the buffer capacity to hold at least *size* elements updating
+ ``ptr_`` and ``capacity_``.
+ \endrst
+ */
+ virtual void grow(std::size_t size) = 0;
+
+ public:
+ virtual ~Buffer() {}
+
+ /** Returns the size of this buffer. */
+ std::size_t size() const { return size_; }
+
+ /** Returns the capacity of this buffer. */
+ std::size_t capacity() const { return capacity_; }
+
+ /**
+ Resizes the buffer. If T is a POD type new elements may not be initialized.
+ */
+ void resize(std::size_t new_size) {
+ if (new_size > capacity_)
+ grow(new_size);
+ size_ = new_size;
+ }
+
+ /**
+ \rst
+ Reserves space to store at least *capacity* elements.
+ \endrst
+ */
+ void reserve(std::size_t capacity) {
+ if (capacity > capacity_)
+ grow(capacity);
+ }
+
+ void clear() FMT_NOEXCEPT { size_ = 0; }
+
+ void push_back(const T &value) {
+ if (size_ == capacity_)
+ grow(size_ + 1);
+ ptr_[size_++] = value;
+ }
+
+ /** Appends data to the end of the buffer. */
+ template <typename U>
+ void append(const U *begin, const U *end);
+
+ T &operator[](std::size_t index) { return ptr_[index]; }
+ const T &operator[](std::size_t index) const { return ptr_[index]; }
+};
+
+template <typename T>
+template <typename U>
+void Buffer<T>::append(const U *begin, const U *end) {
+ std::size_t new_size = size_ + internal::to_unsigned(end - begin);
+ if (new_size > capacity_)
+ grow(new_size);
+ std::uninitialized_copy(begin, end,
+ internal::make_ptr(ptr_, capacity_) + size_);
+ size_ = new_size;
+}
+
+namespace internal {
+
+// A memory buffer for trivially copyable/constructible types with the first
+// SIZE elements stored in the object itself.
+template <typename T, std::size_t SIZE, typename Allocator = std::allocator<T> >
+class MemoryBuffer : private Allocator, public Buffer<T> {
+ private:
+ T data_[SIZE];
+
+ // Deallocate memory allocated by the buffer.
+ void deallocate() {
+ if (this->ptr_ != data_) Allocator::deallocate(this->ptr_, this->capacity_);
+ }
+
+ protected:
+ void grow(std::size_t size);
+
+ public:
+ explicit MemoryBuffer(const Allocator &alloc = Allocator())
+ : Allocator(alloc), Buffer<T>(data_, SIZE) {}
+ ~MemoryBuffer() { deallocate(); }
+
+#if FMT_USE_RVALUE_REFERENCES
+ private:
+ // Move data from other to this buffer.
+ void move(MemoryBuffer &other) {
+ Allocator &this_alloc = *this, &other_alloc = other;
+ this_alloc = std::move(other_alloc);
+ this->size_ = other.size_;
+ this->capacity_ = other.capacity_;
+ if (other.ptr_ == other.data_) {
+ this->ptr_ = data_;
+ std::uninitialized_copy(other.data_, other.data_ + this->size_,
+ make_ptr(data_, this->capacity_));
+ } else {
+ this->ptr_ = other.ptr_;
+ // Set pointer to the inline array so that delete is not called
+ // when deallocating.
+ other.ptr_ = other.data_;
+ }
+ }
+
+ public:
+ MemoryBuffer(MemoryBuffer &&other) {
+ move(other);
+ }
+
+ MemoryBuffer &operator=(MemoryBuffer &&other) {
+ assert(this != &other);
+ deallocate();
+ move(other);
+ return *this;
+ }
+#endif
+
+ // Returns a copy of the allocator associated with this buffer.
+ Allocator get_allocator() const { return *this; }
+};
+
+template <typename T, std::size_t SIZE, typename Allocator>
+void MemoryBuffer<T, SIZE, Allocator>::grow(std::size_t size) {
+ std::size_t new_capacity = this->capacity_ + this->capacity_ / 2;
+ if (size > new_capacity)
+ new_capacity = size;
+ T *new_ptr = this->allocate(new_capacity);
+ // The following code doesn't throw, so the raw pointer above doesn't leak.
+ std::uninitialized_copy(this->ptr_, this->ptr_ + this->size_,
+ make_ptr(new_ptr, new_capacity));
+ std::size_t old_capacity = this->capacity_;
+ T *old_ptr = this->ptr_;
+ this->capacity_ = new_capacity;
+ this->ptr_ = new_ptr;
+ // deallocate may throw (at least in principle), but it doesn't matter since
+ // the buffer already uses the new storage and will deallocate it in case
+ // of exception.
+ if (old_ptr != data_)
+ Allocator::deallocate(old_ptr, old_capacity);
+}
+
+// A fixed-size buffer.
+template <typename Char>
+class FixedBuffer : public fmt::Buffer<Char> {
+ public:
+ FixedBuffer(Char *array, std::size_t size) : fmt::Buffer<Char>(array, size) {}
+
+ protected:
+ FMT_API void grow(std::size_t size);
+};
+
+template <typename Char>
+class BasicCharTraits {
+ public:
+#if FMT_SECURE_SCL
+ typedef stdext::checked_array_iterator<Char*> CharPtr;
+#else
+ typedef Char *CharPtr;
+#endif
+ static Char cast(int value) { return static_cast<Char>(value); }
+};
+
+template <typename Char>
+class CharTraits;
+
+template <>
+class CharTraits<char> : public BasicCharTraits<char> {
+ private:
+ // Conversion from wchar_t to char is not allowed.
+ static char convert(wchar_t);
+
+ public:
+ static char convert(char value) { return value; }
+
+ // Formats a floating-point number.
+ template <typename T>
+ FMT_API static int format_float(char *buffer, std::size_t size,
+ const char *format, unsigned width, int precision, T value);
+};
+
+template <>
+class CharTraits<wchar_t> : public BasicCharTraits<wchar_t> {
+ public:
+ static wchar_t convert(char value) { return value; }
+ static wchar_t convert(wchar_t value) { return value; }
+
+ template <typename T>
+ FMT_API static int format_float(wchar_t *buffer, std::size_t size,
+ const wchar_t *format, unsigned width, int precision, T value);
+};
+
+// Checks if a number is negative - used to avoid warnings.
+template <bool IsSigned>
+struct SignChecker {
+ template <typename T>
+ static bool is_negative(T value) { return value < 0; }
+};
+
+template <>
+struct SignChecker<false> {
+ template <typename T>
+ static bool is_negative(T) { return false; }
+};
+
+// Returns true if value is negative, false otherwise.
+// Same as (value < 0) but doesn't produce warnings if T is an unsigned type.
+template <typename T>
+inline bool is_negative(T value) {
+ return SignChecker<std::numeric_limits<T>::is_signed>::is_negative(value);
+}
+
+// Selects uint32_t if FitsIn32Bits is true, uint64_t otherwise.
+template <bool FitsIn32Bits>
+struct TypeSelector { typedef uint32_t Type; };
+
+template <>
+struct TypeSelector<false> { typedef uint64_t Type; };
+
+template <typename T>
+struct IntTraits {
+ // Smallest of uint32_t and uint64_t that is large enough to represent
+ // all values of T.
+ typedef typename
+ TypeSelector<std::numeric_limits<T>::digits <= 32>::Type MainType;
+};
+
+FMT_API void report_unknown_type(char code, const char *type);
+
+// Static data is placed in this class template to allow header-only
+// configuration.
+template <typename T = void>
+struct FMT_API BasicData {
+ static const uint32_t POWERS_OF_10_32[];
+ static const uint64_t POWERS_OF_10_64[];
+ static const char DIGITS[];
+};
+
+#ifndef FMT_USE_EXTERN_TEMPLATES
+// Clang doesn't have a feature check for extern templates so we check
+// for variadic templates which were introduced in the same version.
+# define FMT_USE_EXTERN_TEMPLATES (__clang__ && FMT_USE_VARIADIC_TEMPLATES)
+#endif
+
+#if FMT_USE_EXTERN_TEMPLATES && !defined(FMT_HEADER_ONLY)
+extern template struct BasicData<void>;
+#endif
+
+typedef BasicData<> Data;
+
+#ifdef FMT_BUILTIN_CLZLL
+// Returns the number of decimal digits in n. Leading zeros are not counted
+// except for n == 0 in which case count_digits returns 1.
+inline unsigned count_digits(uint64_t n) {
+ // Based on http://graphics.stanford.edu/~seander/bithacks.html#IntegerLog10
+ // and the benchmark https://github.com/localvoid/cxx-benchmark-count-digits.
+ int t = (64 - FMT_BUILTIN_CLZLL(n | 1)) * 1233 >> 12;
+ return to_unsigned(t) - (n < Data::POWERS_OF_10_64[t]) + 1;
+}
+#else
+// Fallback version of count_digits used when __builtin_clz is not available.
+inline unsigned count_digits(uint64_t n) {
+ unsigned count = 1;
+ for (;;) {
+ // Integer division is slow so do it for a group of four digits instead
+ // of for every digit. The idea comes from the talk by Alexandrescu
+ // "Three Optimization Tips for C++". See speed-test for a comparison.
+ if (n < 10) return count;
+ if (n < 100) return count + 1;
+ if (n < 1000) return count + 2;
+ if (n < 10000) return count + 3;
+ n /= 10000u;
+ count += 4;
+ }
+}
+#endif
+
+#ifdef FMT_BUILTIN_CLZ
+// Optional version of count_digits for better performance on 32-bit platforms.
+inline unsigned count_digits(uint32_t n) {
+ int t = (32 - FMT_BUILTIN_CLZ(n | 1)) * 1233 >> 12;
+ return to_unsigned(t) - (n < Data::POWERS_OF_10_32[t]) + 1;
+}
+#endif
+
+// A functor that doesn't add a thousands separator.
+struct NoThousandsSep {
+ template <typename Char>
+ void operator()(Char *) {}
+};
+
+// A functor that adds a thousands separator.
+class ThousandsSep {
+ private:
+ fmt::StringRef sep_;
+
+ // Index of a decimal digit with the least significant digit having index 0.
+ unsigned digit_index_;
+
+ public:
+ explicit ThousandsSep(fmt::StringRef sep) : sep_(sep), digit_index_(0) {}
+
+ template <typename Char>
+ void operator()(Char *&buffer) {
+ if (++digit_index_ % 3 != 0)
+ return;
+ buffer -= sep_.size();
+ std::uninitialized_copy(sep_.data(), sep_.data() + sep_.size(),
+ internal::make_ptr(buffer, sep_.size()));
+ }
+};
+
+// Formats a decimal unsigned integer value writing into buffer.
+// thousands_sep is a functor that is called after writing each char to
+// add a thousands separator if necessary.
+template <typename UInt, typename Char, typename ThousandsSep>
+inline void format_decimal(Char *buffer, UInt value, unsigned num_digits,
+ ThousandsSep thousands_sep) {
+ buffer += num_digits;
+ while (value >= 100) {
+ // Integer division is slow so do it for a group of two digits instead
+ // of for every digit. The idea comes from the talk by Alexandrescu
+ // "Three Optimization Tips for C++". See speed-test for a comparison.
+ unsigned index = static_cast<unsigned>((value % 100) * 2);
+ value /= 100;
+ *--buffer = Data::DIGITS[index + 1];
+ thousands_sep(buffer);
+ *--buffer = Data::DIGITS[index];
+ thousands_sep(buffer);
+ }
+ if (value < 10) {
+ *--buffer = static_cast<char>('0' + value);
+ return;
+ }
+ unsigned index = static_cast<unsigned>(value * 2);
+ *--buffer = Data::DIGITS[index + 1];
+ thousands_sep(buffer);
+ *--buffer = Data::DIGITS[index];
+}
+
+template <typename UInt, typename Char>
+inline void format_decimal(Char *buffer, UInt value, unsigned num_digits) {
+ return format_decimal(buffer, value, num_digits, NoThousandsSep());
+}
+
+#ifndef _WIN32
+# define FMT_USE_WINDOWS_H 0
+#elif !defined(FMT_USE_WINDOWS_H)
+# define FMT_USE_WINDOWS_H 1
+#endif
+
+// Define FMT_USE_WINDOWS_H to 0 to disable use of windows.h.
+// All the functionality that relies on it will be disabled too.
+#if FMT_USE_WINDOWS_H
+// A converter from UTF-8 to UTF-16.
+// It is only provided for Windows since other systems support UTF-8 natively.
+class UTF8ToUTF16 {
+ private:
+ MemoryBuffer<wchar_t, INLINE_BUFFER_SIZE> buffer_;
+
+ public:
+ FMT_API explicit UTF8ToUTF16(StringRef s);
+ operator WStringRef() const { return WStringRef(&buffer_[0], size()); }
+ size_t size() const { return buffer_.size() - 1; }
+ const wchar_t *c_str() const { return &buffer_[0]; }
+ std::wstring str() const { return std::wstring(&buffer_[0], size()); }
+};
+
+// A converter from UTF-16 to UTF-8.
+// It is only provided for Windows since other systems support UTF-8 natively.
+class UTF16ToUTF8 {
+ private:
+ MemoryBuffer<char, INLINE_BUFFER_SIZE> buffer_;
+
+ public:
+ UTF16ToUTF8() {}
+ FMT_API explicit UTF16ToUTF8(WStringRef s);
+ operator StringRef() const { return StringRef(&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(WStringRef s);
+};
+
+FMT_API void format_windows_error(fmt::Writer &out, int error_code,
+ fmt::StringRef message) FMT_NOEXCEPT;
+#endif
+
+// A formatting argument value.
+struct Value {
+ template <typename Char>
+ struct StringValue {
+ const Char *value;
+ std::size_t size;
+ };
+
+ typedef void (*FormatFunc)(
+ void *formatter, const void *arg, void *format_str_ptr);
+
+ struct CustomValue {
+ const void *value;
+ FormatFunc format;
+ };
+
+ union {
+ int int_value;
+ unsigned uint_value;
+ LongLong long_long_value;
+ ULongLong ulong_long_value;
+ double double_value;
+ long double long_double_value;
+ const void *pointer;
+ StringValue<char> string;
+ StringValue<signed char> sstring;
+ StringValue<unsigned char> ustring;
+ StringValue<wchar_t> wstring;
+ CustomValue custom;
+ };
+
+ enum Type {
+ NONE, NAMED_ARG,
+ // Integer types should go first,
+ INT, UINT, LONG_LONG, ULONG_LONG, BOOL, CHAR, LAST_INTEGER_TYPE = CHAR,
+ // followed by floating-point types.
+ DOUBLE, LONG_DOUBLE, LAST_NUMERIC_TYPE = LONG_DOUBLE,
+ CSTRING, STRING, WSTRING, POINTER, CUSTOM
+ };
+};
+
+// A formatting argument. It is a trivially copyable/constructible type to
+// allow storage in internal::MemoryBuffer.
+struct Arg : Value {
+ Type type;
+};
+
+template <typename Char>
+struct NamedArg;
+
+template <typename T = void>
+struct Null {};
+
+// A helper class template to enable or disable overloads taking wide
+// characters and strings in MakeValue.
+template <typename T, typename Char>
+struct WCharHelper {
+ typedef Null<T> Supported;
+ typedef T Unsupported;
+};
+
+template <typename T>
+struct WCharHelper<T, wchar_t> {
+ typedef T Supported;
+ typedef Null<T> Unsupported;
+};
+
+typedef char Yes[1];
+typedef char No[2];
+
+template <typename T>
+T &get();
+
+// These are non-members to workaround an overload resolution bug in bcc32.
+Yes &convert(fmt::ULongLong);
+No &convert(...);
+
+template<typename T, bool ENABLE_CONVERSION>
+struct ConvertToIntImpl {
+ enum { value = ENABLE_CONVERSION };
+};
+
+template<typename T, bool ENABLE_CONVERSION>
+struct ConvertToIntImpl2 {
+ enum { value = false };
+};
+
+template<typename T>
+struct ConvertToIntImpl2<T, true> {
+ enum {
+ // Don't convert numeric types.
+ value = ConvertToIntImpl<T, !std::numeric_limits<T>::is_specialized>::value
+ };
+};
+
+template<typename T>
+struct ConvertToInt {
+ enum { enable_conversion = sizeof(convert(get<T>())) == sizeof(Yes) };
+ enum { value = ConvertToIntImpl2<T, enable_conversion>::value };
+};
+
+#define FMT_DISABLE_CONVERSION_TO_INT(Type) \
+ template <> \
+ struct ConvertToInt<Type> { enum { value = 0 }; }
+
+// Silence warnings about convering float to int.
+FMT_DISABLE_CONVERSION_TO_INT(float);
+FMT_DISABLE_CONVERSION_TO_INT(double);
+FMT_DISABLE_CONVERSION_TO_INT(long double);
+
+template<bool B, class T = void>
+struct EnableIf {};
+
+template<class T>
+struct EnableIf<true, T> { typedef T type; };
+
+template<bool B, class T, class F>
+struct Conditional { typedef T type; };
+
+template<class T, class F>
+struct Conditional<false, T, F> { typedef F type; };
+
+// For bcc32 which doesn't understand ! in template arguments.
+template<bool>
+struct Not { enum { value = 0 }; };
+
+template<>
+struct Not<false> { enum { value = 1 }; };
+
+template<typename T, T> struct LConvCheck {
+ LConvCheck(int) {}
+};
+
+// Returns the thousands separator for the current locale.
+// We check if ``lconv`` contains ``thousands_sep`` because on Android
+// ``lconv`` is stubbed as an empty struct.
+template <typename LConv>
+inline StringRef thousands_sep(
+ LConv *lc, LConvCheck<char *LConv::*, &LConv::thousands_sep> = 0) {
+ return lc->thousands_sep;
+}
+
+inline fmt::StringRef thousands_sep(...) { return ""; }
+
+// Makes an Arg object from any type.
+template <typename Formatter>
+class MakeValue : public Arg {
+ public:
+ typedef typename Formatter::Char Char;
+
+ private:
+ // The following two methods are private to disallow formatting of
+ // arbitrary pointers. If you want to output a pointer cast it to
+ // "void *" or "const void *". In particular, this forbids formatting
+ // of "[const] volatile char *" which is printed as bool by iostreams.
+ // Do not implement!
+ template <typename T>
+ MakeValue(const T *value);
+ template <typename T>
+ MakeValue(T *value);
+
+ // The following methods are private to disallow formatting of wide
+ // characters and strings into narrow strings as in
+ // fmt::format("{}", L"test");
+ // To fix this, use a wide format string: fmt::format(L"{}", L"test").
+#if !FMT_MSC_VER || defined(_NATIVE_WCHAR_T_DEFINED)
+ MakeValue(typename WCharHelper<wchar_t, Char>::Unsupported);
+#endif
+ MakeValue(typename WCharHelper<wchar_t *, Char>::Unsupported);
+ MakeValue(typename WCharHelper<const wchar_t *, Char>::Unsupported);
+ MakeValue(typename WCharHelper<const std::wstring &, Char>::Unsupported);
+ MakeValue(typename WCharHelper<WStringRef, Char>::Unsupported);
+
+ void set_string(StringRef str) {
+ string.value = str.data();
+ string.size = str.size();
+ }
+
+ void set_string(WStringRef str) {
+ wstring.value = str.data();
+ wstring.size = str.size();
+ }
+
+ // Formats an argument of a custom type, such as a user-defined class.
+ template <typename T>
+ static void format_custom_arg(
+ void *formatter, const void *arg, void *format_str_ptr) {
+ format(*static_cast<Formatter*>(formatter),
+ *static_cast<const Char**>(format_str_ptr),
+ *static_cast<const T*>(arg));
+ }
+
+ public:
+ MakeValue() {}
+
+#define FMT_MAKE_VALUE_(Type, field, TYPE, rhs) \
+ MakeValue(Type value) { field = rhs; } \
+ static uint64_t type(Type) { return Arg::TYPE; }
+
+#define FMT_MAKE_VALUE(Type, field, TYPE) \
+ FMT_MAKE_VALUE_(Type, field, TYPE, value)
+
+ FMT_MAKE_VALUE(bool, int_value, BOOL)
+ FMT_MAKE_VALUE(short, int_value, INT)
+ FMT_MAKE_VALUE(unsigned short, uint_value, UINT)
+ FMT_MAKE_VALUE(int, int_value, INT)
+ FMT_MAKE_VALUE(unsigned, uint_value, UINT)
+
+ MakeValue(long value) {
+ // To minimize the number of types we need to deal with, long is
+ // translated either to int or to long long depending on its size.
+ if (const_check(sizeof(long) == sizeof(int)))
+ int_value = static_cast<int>(value);
+ else
+ long_long_value = value;
+ }
+ static uint64_t type(long) {
+ return sizeof(long) == sizeof(int) ? Arg::INT : Arg::LONG_LONG;
+ }
+
+ MakeValue(unsigned long value) {
+ if (const_check(sizeof(unsigned long) == sizeof(unsigned)))
+ uint_value = static_cast<unsigned>(value);
+ else
+ ulong_long_value = value;
+ }
+ static uint64_t type(unsigned long) {
+ return sizeof(unsigned long) == sizeof(unsigned) ?
+ Arg::UINT : Arg::ULONG_LONG;
+ }
+
+ FMT_MAKE_VALUE(LongLong, long_long_value, LONG_LONG)
+ FMT_MAKE_VALUE(ULongLong, ulong_long_value, ULONG_LONG)
+ FMT_MAKE_VALUE(float, double_value, DOUBLE)
+ FMT_MAKE_VALUE(double, double_value, DOUBLE)
+ FMT_MAKE_VALUE(long double, long_double_value, LONG_DOUBLE)
+ FMT_MAKE_VALUE(signed char, int_value, INT)
+ FMT_MAKE_VALUE(unsigned char, uint_value, UINT)
+ FMT_MAKE_VALUE(char, int_value, CHAR)
+
+#if !defined(_MSC_VER) || defined(_NATIVE_WCHAR_T_DEFINED)
+ MakeValue(typename WCharHelper<wchar_t, Char>::Supported value) {
+ int_value = value;
+ }
+ static uint64_t type(wchar_t) { return Arg::CHAR; }
+#endif
+
+#define FMT_MAKE_STR_VALUE(Type, TYPE) \
+ MakeValue(Type value) { set_string(value); } \
+ static uint64_t type(Type) { return Arg::TYPE; }
+
+ FMT_MAKE_VALUE(char *, string.value, CSTRING)
+ FMT_MAKE_VALUE(const char *, string.value, CSTRING)
+ FMT_MAKE_VALUE(const signed char *, sstring.value, CSTRING)
+ FMT_MAKE_VALUE(const unsigned char *, ustring.value, CSTRING)
+ FMT_MAKE_STR_VALUE(const std::string &, STRING)
+ FMT_MAKE_STR_VALUE(StringRef, STRING)
+ FMT_MAKE_VALUE_(CStringRef, string.value, CSTRING, value.c_str())
+
+#define FMT_MAKE_WSTR_VALUE(Type, TYPE) \
+ MakeValue(typename WCharHelper<Type, Char>::Supported value) { \
+ set_string(value); \
+ } \
+ static uint64_t type(Type) { return Arg::TYPE; }
+
+ FMT_MAKE_WSTR_VALUE(wchar_t *, WSTRING)
+ FMT_MAKE_WSTR_VALUE(const wchar_t *, WSTRING)
+ FMT_MAKE_WSTR_VALUE(const std::wstring &, WSTRING)
+ FMT_MAKE_WSTR_VALUE(WStringRef, WSTRING)
+
+ FMT_MAKE_VALUE(void *, pointer, POINTER)
+ FMT_MAKE_VALUE(const void *, pointer, POINTER)
+
+ template <typename T>
+ MakeValue(const T &value,
+ typename EnableIf<Not<
+ ConvertToInt<T>::value>::value, int>::type = 0) {
+ custom.value = &value;
+ custom.format = &format_custom_arg<T>;
+ }
+
+ template <typename T>
+ MakeValue(const T &value,
+ typename EnableIf<ConvertToInt<T>::value, int>::type = 0) {
+ int_value = value;
+ }
+
+ template <typename T>
+ static uint64_t type(const T &) {
+ return ConvertToInt<T>::value ? Arg::INT : Arg::CUSTOM;
+ }
+
+ // Additional template param `Char_` is needed here because make_type always
+ // uses char.
+ template <typename Char_>
+ MakeValue(const NamedArg<Char_> &value) { pointer = &value; }
+
+ template <typename Char_>
+ static uint64_t type(const NamedArg<Char_> &) { return Arg::NAMED_ARG; }
+};
+
+template <typename Formatter>
+class MakeArg : public Arg {
+public:
+ MakeArg() {
+ type = Arg::NONE;
+ }
+
+ template <typename T>
+ MakeArg(const T &value)
+ : Arg(MakeValue<Formatter>(value)) {
+ type = static_cast<Arg::Type>(MakeValue<Formatter>::type(value));
+ }
+};
+
+template <typename Char>
+struct NamedArg : Arg {
+ BasicStringRef<Char> name;
+
+ template <typename T>
+ NamedArg(BasicStringRef<Char> argname, const T &value)
+ : Arg(MakeArg< BasicFormatter<Char> >(value)), name(argname) {}
+};
+
+class RuntimeError : public std::runtime_error {
+ protected:
+ RuntimeError() : std::runtime_error("") {}
+ ~RuntimeError() throw();
+};
+
+template <typename Char>
+class ArgMap;
+} // namespace internal
+
+/** An argument list. */
+class ArgList {
+ private:
+ // To reduce compiled code size per formatting function call, types of first
+ // MAX_PACKED_ARGS arguments are passed in the types_ field.
+ uint64_t types_;
+ union {
+ // If the number of arguments is less than MAX_PACKED_ARGS, the argument
+ // values are stored in values_, otherwise they are stored in args_.
+ // This is done to reduce compiled code size as storing larger objects
+ // may require more code (at least on x86-64) even if the same amount of
+ // data is actually copied to stack. It saves ~10% on the bloat test.
+ const internal::Value *values_;
+ const internal::Arg *args_;
+ };
+
+ internal::Arg::Type type(unsigned index) const {
+ unsigned shift = index * 4;
+ uint64_t mask = 0xf;
+ return static_cast<internal::Arg::Type>(
+ (types_ & (mask << shift)) >> shift);
+ }
+
+ template <typename Char>
+ friend class internal::ArgMap;
+
+ public:
+ // Maximum number of arguments with packed types.
+ enum { MAX_PACKED_ARGS = 16 };
+
+ ArgList() : types_(0) {}
+
+ ArgList(ULongLong types, const internal::Value *values)
+ : types_(types), values_(values) {}
+ ArgList(ULongLong types, const internal::Arg *args)
+ : types_(types), args_(args) {}
+
+ /** Returns the argument at specified index. */
+ internal::Arg operator[](unsigned index) const {
+ using internal::Arg;
+ Arg arg;
+ bool use_values = type(MAX_PACKED_ARGS - 1) == Arg::NONE;
+ if (index < MAX_PACKED_ARGS) {
+ Arg::Type arg_type = type(index);
+ internal::Value &val = arg;
+ if (arg_type != Arg::NONE)
+ val = use_values ? values_[index] : args_[index];
+ arg.type = arg_type;
+ return arg;
+ }
+ if (use_values) {
+ // The index is greater than the number of arguments that can be stored
+ // in values, so return a "none" argument.
+ arg.type = Arg::NONE;
+ return arg;
+ }
+ for (unsigned i = MAX_PACKED_ARGS; i <= index; ++i) {
+ if (args_[i].type == Arg::NONE)
+ return args_[i];
+ }
+ return args_[index];
+ }
+};
+
+#define FMT_DISPATCH(call) static_cast<Impl*>(this)->call
+
+/**
+ \rst
+ An argument visitor based on the `curiously recurring template pattern
+ <http://en.wikipedia.org/wiki/Curiously_recurring_template_pattern>`_.
+
+ To use `~fmt::ArgVisitor` define a subclass that implements some or all of the
+ visit methods with the same signatures as the methods in `~fmt::ArgVisitor`,
+ for example, `~fmt::ArgVisitor::visit_int()`.
+ Pass the subclass as the *Impl* template parameter. Then calling
+ `~fmt::ArgVisitor::visit` for some argument will dispatch to a visit method
+ specific to the argument type. For example, if the argument type is
+ ``double`` then the `~fmt::ArgVisitor::visit_double()` method of a subclass
+ will be called. If the subclass doesn't contain a method with this signature,
+ then a corresponding method of `~fmt::ArgVisitor` will be called.
+
+ **Example**::
+
+ class MyArgVisitor : public fmt::ArgVisitor<MyArgVisitor, void> {
+ public:
+ void visit_int(int value) { fmt::print("{}", value); }
+ void visit_double(double value) { fmt::print("{}", value ); }
+ };
+ \endrst
+ */
+template <typename Impl, typename Result>
+class ArgVisitor {
+ private:
+ typedef internal::Arg Arg;
+
+ public:
+ void report_unhandled_arg() {}
+
+ Result visit_unhandled_arg() {
+ FMT_DISPATCH(report_unhandled_arg());
+ return Result();
+ }
+
+ /** Visits an ``int`` argument. **/
+ Result visit_int(int value) {
+ return FMT_DISPATCH(visit_any_int(value));
+ }
+
+ /** Visits a ``long long`` argument. **/
+ Result visit_long_long(LongLong value) {
+ return FMT_DISPATCH(visit_any_int(value));
+ }
+
+ /** Visits an ``unsigned`` argument. **/
+ Result visit_uint(unsigned value) {
+ return FMT_DISPATCH(visit_any_int(value));
+ }
+
+ /** Visits an ``unsigned long long`` argument. **/
+ Result visit_ulong_long(ULongLong value) {
+ return FMT_DISPATCH(visit_any_int(value));
+ }
+
+ /** Visits a ``bool`` argument. **/
+ Result visit_bool(bool value) {
+ return FMT_DISPATCH(visit_any_int(value));
+ }
+
+ /** Visits a ``char`` or ``wchar_t`` argument. **/
+ Result visit_char(int value) {
+ return FMT_DISPATCH(visit_any_int(value));
+ }
+
+ /** Visits an argument of any integral type. **/
+ template <typename T>
+ Result visit_any_int(T) {
+ return FMT_DISPATCH(visit_unhandled_arg());
+ }
+
+ /** Visits a ``double`` argument. **/
+ Result visit_double(double value) {
+ return FMT_DISPATCH(visit_any_double(value));
+ }
+
+ /** Visits a ``long double`` argument. **/
+ Result visit_long_double(long double value) {
+ return FMT_DISPATCH(visit_any_double(value));
+ }
+
+ /** Visits a ``double`` or ``long double`` argument. **/
+ template <typename T>
+ Result visit_any_double(T) {
+ return FMT_DISPATCH(visit_unhandled_arg());
+ }
+
+ /** Visits a null-terminated C string (``const char *``) argument. **/
+ Result visit_cstring(const char *) {
+ return FMT_DISPATCH(visit_unhandled_arg());
+ }
+
+ /** Visits a string argument. **/
+ Result visit_string(Arg::StringValue<char>) {
+ return FMT_DISPATCH(visit_unhandled_arg());
+ }
+
+ /** Visits a wide string argument. **/
+ Result visit_wstring(Arg::StringValue<wchar_t>) {
+ return FMT_DISPATCH(visit_unhandled_arg());
+ }
+
+ /** Visits a pointer argument. **/
+ Result visit_pointer(const void *) {
+ return FMT_DISPATCH(visit_unhandled_arg());
+ }
+
+ /** Visits an argument of a custom (user-defined) type. **/
+ Result visit_custom(Arg::CustomValue) {
+ return FMT_DISPATCH(visit_unhandled_arg());
+ }
+
+ /**
+ \rst
+ Visits an argument dispatching to the appropriate visit method based on
+ the argument type. For example, if the argument type is ``double`` then
+ the `~fmt::ArgVisitor::visit_double()` method of the *Impl* class will be
+ called.
+ \endrst
+ */
+ Result visit(const Arg &arg) {
+ switch (arg.type) {
+ case Arg::NONE:
+ case Arg::NAMED_ARG:
+ FMT_ASSERT(false, "invalid argument type");
+ break;
+ case Arg::INT:
+ return FMT_DISPATCH(visit_int(arg.int_value));
+ case Arg::UINT:
+ return FMT_DISPATCH(visit_uint(arg.uint_value));
+ case Arg::LONG_LONG:
+ return FMT_DISPATCH(visit_long_long(arg.long_long_value));
+ case Arg::ULONG_LONG:
+ return FMT_DISPATCH(visit_ulong_long(arg.ulong_long_value));
+ case Arg::BOOL:
+ return FMT_DISPATCH(visit_bool(arg.int_value != 0));
+ case Arg::CHAR:
+ return FMT_DISPATCH(visit_char(arg.int_value));
+ case Arg::DOUBLE:
+ return FMT_DISPATCH(visit_double(arg.double_value));
+ case Arg::LONG_DOUBLE:
+ return FMT_DISPATCH(visit_long_double(arg.long_double_value));
+ case Arg::CSTRING:
+ return FMT_DISPATCH(visit_cstring(arg.string.value));
+ case Arg::STRING:
+ return FMT_DISPATCH(visit_string(arg.string));
+ case Arg::WSTRING:
+ return FMT_DISPATCH(visit_wstring(arg.wstring));
+ case Arg::POINTER:
+ return FMT_DISPATCH(visit_pointer(arg.pointer));
+ case Arg::CUSTOM:
+ return FMT_DISPATCH(visit_custom(arg.custom));
+ }
+ return Result();
+ }
+};
+
+enum Alignment {
+ ALIGN_DEFAULT, ALIGN_LEFT, ALIGN_RIGHT, ALIGN_CENTER, ALIGN_NUMERIC
+};
+
+// Flags.
+enum {
+ SIGN_FLAG = 1, PLUS_FLAG = 2, MINUS_FLAG = 4, HASH_FLAG = 8,
+ CHAR_FLAG = 0x10 // Argument has char type - used in error reporting.
+};
+
+// An empty format specifier.
+struct EmptySpec {};
+
+// A type specifier.
+template <char TYPE>
+struct TypeSpec : EmptySpec {
+ Alignment align() const { return ALIGN_DEFAULT; }
+ unsigned width() const { return 0; }
+ int precision() const { return -1; }
+ bool flag(unsigned) const { return false; }
+ char type() const { return TYPE; }
+ char fill() const { return ' '; }
+};
+
+// A width specifier.
+struct WidthSpec {
+ unsigned width_;
+ // Fill is always wchar_t and cast to char if necessary to avoid having
+ // two specialization of WidthSpec and its subclasses.
+ wchar_t fill_;
+
+ WidthSpec(unsigned width, wchar_t fill) : width_(width), fill_(fill) {}
+
+ unsigned width() const { return width_; }
+ wchar_t fill() const { return fill_; }
+};
+
+// An alignment specifier.
+struct AlignSpec : WidthSpec {
+ Alignment align_;
+
+ AlignSpec(unsigned width, wchar_t fill, Alignment align = ALIGN_DEFAULT)
+ : WidthSpec(width, fill), align_(align) {}
+
+ Alignment align() const { return align_; }
+
+ int precision() const { return -1; }
+};
+
+// An alignment and type specifier.
+template <char TYPE>
+struct AlignTypeSpec : AlignSpec {
+ AlignTypeSpec(unsigned width, wchar_t fill) : AlignSpec(width, fill) {}
+
+ bool flag(unsigned) const { return false; }
+ char type() const { return TYPE; }
+};
+
+// A full format specifier.
+struct FormatSpec : AlignSpec {
+ unsigned flags_;
+ int precision_;
+ char type_;
+
+ FormatSpec(
+ unsigned width = 0, char type = 0, wchar_t fill = ' ')
+ : AlignSpec(width, fill), flags_(0), precision_(-1), type_(type) {}
+
+ bool flag(unsigned f) const { return (flags_ & f) != 0; }
+ int precision() const { return precision_; }
+ char type() const { return type_; }
+};
+
+// An integer format specifier.
+template <typename T, typename SpecT = TypeSpec<0>, typename Char = char>
+class IntFormatSpec : public SpecT {
+ private:
+ T value_;
+
+ public:
+ IntFormatSpec(T val, const SpecT &spec = SpecT())
+ : SpecT(spec), value_(val) {}
+
+ T value() const { return value_; }
+};
+
+// A string format specifier.
+template <typename Char>
+class StrFormatSpec : public AlignSpec {
+ private:
+ const Char *str_;
+
+ public:
+ template <typename FillChar>
+ StrFormatSpec(const Char *str, unsigned width, FillChar fill)
+ : AlignSpec(width, fill), str_(str) {
+ internal::CharTraits<Char>::convert(FillChar());
+ }
+
+ const Char *str() const { return str_; }
+};
+
+/**
+ Returns an integer format specifier to format the value in base 2.
+ */
+IntFormatSpec<int, TypeSpec<'b'> > bin(int value);
+
+/**
+ Returns an integer format specifier to format the value in base 8.
+ */
+IntFormatSpec<int, TypeSpec<'o'> > oct(int value);
+
+/**
+ Returns an integer format specifier to format the value in base 16 using
+ lower-case letters for the digits above 9.
+ */
+IntFormatSpec<int, TypeSpec<'x'> > hex(int value);
+
+/**
+ Returns an integer formatter format specifier to format in base 16 using
+ upper-case letters for the digits above 9.
+ */
+IntFormatSpec<int, TypeSpec<'X'> > hexu(int value);
+
+/**
+ \rst
+ Returns an integer format specifier to pad the formatted argument with the
+ fill character to the specified width using the default (right) numeric
+ alignment.
+
+ **Example**::
+
+ MemoryWriter out;
+ out << pad(hex(0xcafe), 8, '0');
+ // out.str() == "0000cafe"
+
+ \endrst
+ */
+template <char TYPE_CODE, typename Char>
+IntFormatSpec<int, AlignTypeSpec<TYPE_CODE>, Char> pad(
+ int value, unsigned width, Char fill = ' ');
+
+#define FMT_DEFINE_INT_FORMATTERS(TYPE) \
+inline IntFormatSpec<TYPE, TypeSpec<'b'> > bin(TYPE value) { \
+ return IntFormatSpec<TYPE, TypeSpec<'b'> >(value, TypeSpec<'b'>()); \
+} \
+ \
+inline IntFormatSpec<TYPE, TypeSpec<'o'> > oct(TYPE value) { \
+ return IntFormatSpec<TYPE, TypeSpec<'o'> >(value, TypeSpec<'o'>()); \
+} \
+ \
+inline IntFormatSpec<TYPE, TypeSpec<'x'> > hex(TYPE value) { \
+ return IntFormatSpec<TYPE, TypeSpec<'x'> >(value, TypeSpec<'x'>()); \
+} \
+ \
+inline IntFormatSpec<TYPE, TypeSpec<'X'> > hexu(TYPE value) { \
+ return IntFormatSpec<TYPE, TypeSpec<'X'> >(value, TypeSpec<'X'>()); \
+} \
+ \
+template <char TYPE_CODE> \
+inline IntFormatSpec<TYPE, AlignTypeSpec<TYPE_CODE> > pad( \
+ IntFormatSpec<TYPE, TypeSpec<TYPE_CODE> > f, unsigned width) { \
+ return IntFormatSpec<TYPE, AlignTypeSpec<TYPE_CODE> >( \
+ f.value(), AlignTypeSpec<TYPE_CODE>(width, ' ')); \
+} \
+ \
+/* For compatibility with older compilers we provide two overloads for pad, */ \
+/* one that takes a fill character and one that doesn't. In the future this */ \
+/* can be replaced with one overload making the template argument Char */ \
+/* default to char (C++11). */ \
+template <char TYPE_CODE, typename Char> \
+inline IntFormatSpec<TYPE, AlignTypeSpec<TYPE_CODE>, Char> pad( \
+ IntFormatSpec<TYPE, TypeSpec<TYPE_CODE>, Char> f, \
+ unsigned width, Char fill) { \
+ return IntFormatSpec<TYPE, AlignTypeSpec<TYPE_CODE>, Char>( \
+ f.value(), AlignTypeSpec<TYPE_CODE>(width, fill)); \
+} \
+ \
+inline IntFormatSpec<TYPE, AlignTypeSpec<0> > pad( \
+ TYPE value, unsigned width) { \
+ return IntFormatSpec<TYPE, AlignTypeSpec<0> >( \
+ value, AlignTypeSpec<0>(width, ' ')); \
+} \
+ \
+template <typename Char> \
+inline IntFormatSpec<TYPE, AlignTypeSpec<0>, Char> pad( \
+ TYPE value, unsigned width, Char fill) { \
+ return IntFormatSpec<TYPE, AlignTypeSpec<0>, Char>( \
+ value, AlignTypeSpec<0>(width, fill)); \
+}
+
+FMT_DEFINE_INT_FORMATTERS(int)
+FMT_DEFINE_INT_FORMATTERS(long)
+FMT_DEFINE_INT_FORMATTERS(unsigned)
+FMT_DEFINE_INT_FORMATTERS(unsigned long)
+FMT_DEFINE_INT_FORMATTERS(LongLong)
+FMT_DEFINE_INT_FORMATTERS(ULongLong)
+
+/**
+ \rst
+ Returns a string formatter that pads the formatted argument with the fill
+ character to the specified width using the default (left) string alignment.
+
+ **Example**::
+
+ std::string s = str(MemoryWriter() << pad("abc", 8));
+ // s == "abc "
+
+ \endrst
+ */
+template <typename Char>
+inline StrFormatSpec<Char> pad(
+ const Char *str, unsigned width, Char fill = ' ') {
+ return StrFormatSpec<Char>(str, width, fill);
+}
+
+inline StrFormatSpec<wchar_t> pad(
+ const wchar_t *str, unsigned width, char fill = ' ') {
+ return StrFormatSpec<wchar_t>(str, width, fill);
+}
+
+namespace internal {
+
+template <typename Char>
+class ArgMap {
+ private:
+ typedef std::vector<
+ std::pair<fmt::BasicStringRef<Char>, internal::Arg> > MapType;
+ typedef typename MapType::value_type Pair;
+
+ MapType map_;
+
+ public:
+ FMT_API void init(const ArgList &args);
+
+ const internal::Arg* find(const fmt::BasicStringRef<Char> &name) const {
+ // The list is unsorted, so just return the first matching name.
+ for (typename MapType::const_iterator it = map_.begin(), end = map_.end();
+ it != end; ++it) {
+ if (it->first == name)
+ return &it->second;
+ }
+ return 0;
+ }
+};
+
+template <typename Impl, typename Char>
+class ArgFormatterBase : public ArgVisitor<Impl, void> {
+ private:
+ BasicWriter<Char> &writer_;
+ FormatSpec &spec_;
+
+ FMT_DISALLOW_COPY_AND_ASSIGN(ArgFormatterBase);
+
+ void write_pointer(const void *p) {
+ spec_.flags_ = HASH_FLAG;
+ spec_.type_ = 'x';
+ writer_.write_int(reinterpret_cast<uintptr_t>(p), spec_);
+ }
+
+ protected:
+ BasicWriter<Char> &writer() { return writer_; }
+ FormatSpec &spec() { return spec_; }
+
+ void write(bool value) {
+ const char *str_value = value ? "true" : "false";
+ Arg::StringValue<char> str = { str_value, std::strlen(str_value) };
+ writer_.write_str(str, spec_);
+ }
+
+ void write(const char *value) {
+ Arg::StringValue<char> str = {value, value != 0 ? std::strlen(value) : 0};
+ writer_.write_str(str, spec_);
+ }
+
+ public:
+ ArgFormatterBase(BasicWriter<Char> &w, FormatSpec &s)
+ : writer_(w), spec_(s) {}
+
+ template <typename T>
+ void visit_any_int(T value) { writer_.write_int(value, spec_); }
+
+ template <typename T>
+ void visit_any_double(T value) { writer_.write_double(value, spec_); }
+
+ void visit_bool(bool value) {
+ if (spec_.type_)
+ return visit_any_int(value);
+ write(value);
+ }
+
+ void visit_char(int value) {
+ if (spec_.type_ && spec_.type_ != 'c') {
+ spec_.flags_ |= CHAR_FLAG;
+ writer_.write_int(value, spec_);
+ return;
+ }
+ if (spec_.align_ == ALIGN_NUMERIC || spec_.flags_ != 0)
+ FMT_THROW(FormatError("invalid format specifier for char"));
+ typedef typename BasicWriter<Char>::CharPtr CharPtr;
+ Char fill = internal::CharTraits<Char>::cast(spec_.fill());
+ CharPtr out = CharPtr();
+ const unsigned CHAR_WIDTH = 1;
+ if (spec_.width_ > CHAR_WIDTH) {
+ out = writer_.grow_buffer(spec_.width_);
+ if (spec_.align_ == ALIGN_RIGHT) {
+ std::uninitialized_fill_n(out, spec_.width_ - CHAR_WIDTH, fill);
+ out += spec_.width_ - CHAR_WIDTH;
+ } else if (spec_.align_ == ALIGN_CENTER) {
+ out = writer_.fill_padding(out, spec_.width_,
+ internal::const_check(CHAR_WIDTH), fill);
+ } else {
+ std::uninitialized_fill_n(out + CHAR_WIDTH,
+ spec_.width_ - CHAR_WIDTH, fill);
+ }
+ } else {
+ out = writer_.grow_buffer(CHAR_WIDTH);
+ }
+ *out = internal::CharTraits<Char>::cast(value);
+ }
+
+ void visit_cstring(const char *value) {
+ if (spec_.type_ == 'p')
+ return write_pointer(value);
+ write(value);
+ }
+
+ void visit_string(Arg::StringValue<char> value) {
+ writer_.write_str(value, spec_);
+ }
+
+ using ArgVisitor<Impl, void>::visit_wstring;
+
+ void visit_wstring(Arg::StringValue<Char> value) {
+ writer_.write_str(value, spec_);
+ }
+
+ void visit_pointer(const void *value) {
+ if (spec_.type_ && spec_.type_ != 'p')
+ report_unknown_type(spec_.type_, "pointer");
+ write_pointer(value);
+ }
+};
+
+class FormatterBase {
+ private:
+ ArgList args_;
+ int next_arg_index_;
+
+ // Returns the argument with specified index.
+ FMT_API Arg do_get_arg(unsigned arg_index, const char *&error);
+
+ protected:
+ const ArgList &args() const { return args_; }
+
+ explicit FormatterBase(const ArgList &args) {
+ args_ = args;
+ next_arg_index_ = 0;
+ }
+
+ // Returns the next argument.
+ Arg next_arg(const char *&error) {
+ if (next_arg_index_ >= 0)
+ return do_get_arg(internal::to_unsigned(next_arg_index_++), error);
+ error = "cannot switch from manual to automatic argument indexing";
+ return Arg();
+ }
+
+ // Checks if manual indexing is used and returns the argument with
+ // specified index.
+ Arg get_arg(unsigned arg_index, const char *&error) {
+ return check_no_auto_index(error) ? do_get_arg(arg_index, error) : Arg();
+ }
+
+ bool check_no_auto_index(const char *&error) {
+ if (next_arg_index_ > 0) {
+ error = "cannot switch from automatic to manual argument indexing";
+ return false;
+ }
+ next_arg_index_ = -1;
+ return true;
+ }
+
+ template <typename Char>
+ void write(BasicWriter<Char> &w, const Char *start, const Char *end) {
+ if (start != end)
+ w << BasicStringRef<Char>(start, internal::to_unsigned(end - start));
+ }
+};
+} // namespace internal
+
+/**
+ \rst
+ An argument formatter based on the `curiously recurring template pattern
+ <http://en.wikipedia.org/wiki/Curiously_recurring_template_pattern>`_.
+
+ To use `~fmt::BasicArgFormatter` define a subclass that implements some or
+ all of the visit methods with the same signatures as the methods in
+ `~fmt::ArgVisitor`, for example, `~fmt::ArgVisitor::visit_int()`.
+ Pass the subclass as the *Impl* template parameter. When a formatting
+ function processes an argument, it will dispatch to a visit method
+ specific to the argument type. For example, if the argument type is
+ ``double`` then the `~fmt::ArgVisitor::visit_double()` method of a subclass
+ will be called. If the subclass doesn't contain a method with this signature,
+ then a corresponding method of `~fmt::BasicArgFormatter` or its superclass
+ will be called.
+ \endrst
+ */
+template <typename Impl, typename Char>
+class BasicArgFormatter : public internal::ArgFormatterBase<Impl, Char> {
+ private:
+ BasicFormatter<Char, Impl> &formatter_;
+ const Char *format_;
+
+ public:
+ /**
+ \rst
+ Constructs an argument formatter object.
+ *formatter* is a reference to the main formatter object, *spec* contains
+ format specifier information for standard argument types, and *fmt* points
+ to the part of the format string being parsed for custom argument types.
+ \endrst
+ */
+ BasicArgFormatter(BasicFormatter<Char, Impl> &formatter,
+ FormatSpec &spec, const Char *fmt)
+ : internal::ArgFormatterBase<Impl, Char>(formatter.writer(), spec),
+ formatter_(formatter), format_(fmt) {}
+
+ /** Formats an argument of a custom (user-defined) type. */
+ void visit_custom(internal::Arg::CustomValue c) {
+ c.format(&formatter_, c.value, &format_);
+ }
+};
+
+/** The default argument formatter. */
+template <typename Char>
+class ArgFormatter : public BasicArgFormatter<ArgFormatter<Char>, Char> {
+ public:
+ /** Constructs an argument formatter object. */
+ ArgFormatter(BasicFormatter<Char> &formatter,
+ FormatSpec &spec, const Char *fmt)
+ : BasicArgFormatter<ArgFormatter<Char>, Char>(formatter, spec, fmt) {}
+};
+
+/** This template formats data and writes the output to a writer. */
+template <typename CharType, typename ArgFormatter>
+class BasicFormatter : private internal::FormatterBase {
+ public:
+ /** The character type for the output. */
+ typedef CharType Char;
+
+ private:
+ BasicWriter<Char> &writer_;
+ internal::ArgMap<Char> map_;
+
+ FMT_DISALLOW_COPY_AND_ASSIGN(BasicFormatter);
+
+ using internal::FormatterBase::get_arg;
+
+ // Checks if manual indexing is used and returns the argument with
+ // specified name.
+ internal::Arg get_arg(BasicStringRef<Char> arg_name, const char *&error);
+
+ // Parses argument index and returns corresponding argument.
+ internal::Arg parse_arg_index(const Char *&s);
+
+ // Parses argument name and returns corresponding argument.
+ internal::Arg parse_arg_name(const Char *&s);
+
+ public:
+ /**
+ \rst
+ Constructs a ``BasicFormatter`` object. References to the arguments and
+ the writer are stored in the formatter object so make sure they have
+ appropriate lifetimes.
+ \endrst
+ */
+ BasicFormatter(const ArgList &args, BasicWriter<Char> &w)
+ : internal::FormatterBase(args), writer_(w) {}
+
+ /** Returns a reference to the writer associated with this formatter. */
+ BasicWriter<Char> &writer() { return writer_; }
+
+ /** Formats stored arguments and writes the output to the writer. */
+ void format(BasicCStringRef<Char> format_str);
+
+ // Formats a single argument and advances format_str, a format string pointer.
+ const Char *format(const Char *&format_str, const internal::Arg &arg);
+};
+
+// Generates a comma-separated list with results of applying f to
+// numbers 0..n-1.
+# define FMT_GEN(n, f) FMT_GEN##n(f)
+# define FMT_GEN1(f) f(0)
+# define FMT_GEN2(f) FMT_GEN1(f), f(1)
+# define FMT_GEN3(f) FMT_GEN2(f), f(2)
+# define FMT_GEN4(f) FMT_GEN3(f), f(3)
+# define FMT_GEN5(f) FMT_GEN4(f), f(4)
+# define FMT_GEN6(f) FMT_GEN5(f), f(5)
+# define FMT_GEN7(f) FMT_GEN6(f), f(6)
+# define FMT_GEN8(f) FMT_GEN7(f), f(7)
+# define FMT_GEN9(f) FMT_GEN8(f), f(8)
+# define FMT_GEN10(f) FMT_GEN9(f), f(9)
+# define FMT_GEN11(f) FMT_GEN10(f), f(10)
+# define FMT_GEN12(f) FMT_GEN11(f), f(11)
+# define FMT_GEN13(f) FMT_GEN12(f), f(12)
+# define FMT_GEN14(f) FMT_GEN13(f), f(13)
+# define FMT_GEN15(f) FMT_GEN14(f), f(14)
+
+namespace internal {
+inline uint64_t make_type() { return 0; }
+
+template <typename T>
+inline uint64_t make_type(const T &arg) {
+ return MakeValue< BasicFormatter<char> >::type(arg);
+}
+
+template <unsigned N, bool/*IsPacked*/= (N < ArgList::MAX_PACKED_ARGS)>
+struct ArgArray;
+
+template <unsigned N>
+struct ArgArray<N, true/*IsPacked*/> {
+ typedef Value Type[N > 0 ? N : 1];
+
+ template <typename Formatter, typename T>
+ static Value make(const T &value) {
+#ifdef __clang__
+ Value result = MakeValue<Formatter>(value);
+ // Workaround a bug in Apple LLVM version 4.2 (clang-425.0.28) of clang:
+ // https://github.com/fmtlib/fmt/issues/276
+ (void)result.custom.format;
+ return result;
+#else
+ return MakeValue<Formatter>(value);
+#endif
+ }
+};
+
+template <unsigned N>
+struct ArgArray<N, false/*IsPacked*/> {
+ typedef Arg Type[N + 1]; // +1 for the list end Arg::NONE
+
+ template <typename Formatter, typename T>
+ static Arg make(const T &value) { return MakeArg<Formatter>(value); }
+};
+
+#if FMT_USE_VARIADIC_TEMPLATES
+template <typename Arg, typename... Args>
+inline uint64_t make_type(const Arg &first, const Args & ... tail) {
+ return make_type(first) | (make_type(tail...) << 4);
+}
+
+#else
+
+struct ArgType {
+ uint64_t type;
+
+ ArgType() : type(0) {}
+
+ template <typename T>
+ ArgType(const T &arg) : type(make_type(arg)) {}
+};
+
+# define FMT_ARG_TYPE_DEFAULT(n) ArgType t##n = ArgType()
+
+inline uint64_t make_type(FMT_GEN15(FMT_ARG_TYPE_DEFAULT)) {
+ return t0.type | (t1.type << 4) | (t2.type << 8) | (t3.type << 12) |
+ (t4.type << 16) | (t5.type << 20) | (t6.type << 24) | (t7.type << 28) |
+ (t8.type << 32) | (t9.type << 36) | (t10.type << 40) | (t11.type << 44) |
+ (t12.type << 48) | (t13.type << 52) | (t14.type << 56);
+}
+#endif
+} // namespace internal
+
+# define FMT_MAKE_TEMPLATE_ARG(n) typename T##n
+# define FMT_MAKE_ARG_TYPE(n) T##n
+# define FMT_MAKE_ARG(n) const T##n &v##n
+# define FMT_ASSIGN_char(n) \
+ arr[n] = fmt::internal::MakeValue< fmt::BasicFormatter<char> >(v##n)
+# define FMT_ASSIGN_wchar_t(n) \
+ arr[n] = fmt::internal::MakeValue< fmt::BasicFormatter<wchar_t> >(v##n)
+
+#if FMT_USE_VARIADIC_TEMPLATES
+// Defines a variadic function returning void.
+# define FMT_VARIADIC_VOID(func, arg_type) \
+ template <typename... Args> \
+ void func(arg_type arg0, const Args & ... args) { \
+ typedef fmt::internal::ArgArray<sizeof...(Args)> ArgArray; \
+ typename ArgArray::Type array{ \
+ ArgArray::template make<fmt::BasicFormatter<Char> >(args)...}; \
+ func(arg0, fmt::ArgList(fmt::internal::make_type(args...), array)); \
+ }
+
+// Defines a variadic constructor.
+# define FMT_VARIADIC_CTOR(ctor, func, arg0_type, arg1_type) \
+ template <typename... Args> \
+ ctor(arg0_type arg0, arg1_type arg1, const Args & ... args) { \
+ typedef fmt::internal::ArgArray<sizeof...(Args)> ArgArray; \
+ typename ArgArray::Type array{ \
+ ArgArray::template make<fmt::BasicFormatter<Char> >(args)...}; \
+ func(arg0, arg1, fmt::ArgList(fmt::internal::make_type(args...), array)); \
+ }
+
+#else
+
+# define FMT_MAKE_REF(n) \
+ fmt::internal::MakeValue< fmt::BasicFormatter<Char> >(v##n)
+# define FMT_MAKE_REF2(n) v##n
+
+// Defines a wrapper for a function taking one argument of type arg_type
+// and n additional arguments of arbitrary types.
+# define FMT_WRAP1(func, arg_type, n) \
+ template <FMT_GEN(n, FMT_MAKE_TEMPLATE_ARG)> \
+ inline void func(arg_type arg1, FMT_GEN(n, FMT_MAKE_ARG)) { \
+ const fmt::internal::ArgArray<n>::Type array = {FMT_GEN(n, FMT_MAKE_REF)}; \
+ func(arg1, fmt::ArgList( \
+ fmt::internal::make_type(FMT_GEN(n, FMT_MAKE_REF2)), array)); \
+ }
+
+// Emulates a variadic function returning void on a pre-C++11 compiler.
+# define FMT_VARIADIC_VOID(func, arg_type) \
+ inline void func(arg_type arg) { func(arg, fmt::ArgList()); } \
+ FMT_WRAP1(func, arg_type, 1) FMT_WRAP1(func, arg_type, 2) \
+ FMT_WRAP1(func, arg_type, 3) FMT_WRAP1(func, arg_type, 4) \
+ FMT_WRAP1(func, arg_type, 5) FMT_WRAP1(func, arg_type, 6) \
+ FMT_WRAP1(func, arg_type, 7) FMT_WRAP1(func, arg_type, 8) \
+ FMT_WRAP1(func, arg_type, 9) FMT_WRAP1(func, arg_type, 10)
+
+# define FMT_CTOR(ctor, func, arg0_type, arg1_type, n) \
+ template <FMT_GEN(n, FMT_MAKE_TEMPLATE_ARG)> \
+ ctor(arg0_type arg0, arg1_type arg1, FMT_GEN(n, FMT_MAKE_ARG)) { \
+ const fmt::internal::ArgArray<n>::Type array = {FMT_GEN(n, FMT_MAKE_REF)}; \
+ func(arg0, arg1, fmt::ArgList( \
+ fmt::internal::make_type(FMT_GEN(n, FMT_MAKE_REF2)), array)); \
+ }
+
+// Emulates a variadic constructor on a pre-C++11 compiler.
+# define FMT_VARIADIC_CTOR(ctor, func, arg0_type, arg1_type) \
+ FMT_CTOR(ctor, func, arg0_type, arg1_type, 1) \
+ FMT_CTOR(ctor, func, arg0_type, arg1_type, 2) \
+ FMT_CTOR(ctor, func, arg0_type, arg1_type, 3) \
+ FMT_CTOR(ctor, func, arg0_type, arg1_type, 4) \
+ FMT_CTOR(ctor, func, arg0_type, arg1_type, 5) \
+ FMT_CTOR(ctor, func, arg0_type, arg1_type, 6) \
+ FMT_CTOR(ctor, func, arg0_type, arg1_type, 7) \
+ FMT_CTOR(ctor, func, arg0_type, arg1_type, 8) \
+ FMT_CTOR(ctor, func, arg0_type, arg1_type, 9) \
+ FMT_CTOR(ctor, func, arg0_type, arg1_type, 10)
+#endif
+
+// Generates a comma-separated list with results of applying f to pairs
+// (argument, index).
+#define FMT_FOR_EACH1(f, x0) f(x0, 0)
+#define FMT_FOR_EACH2(f, x0, x1) \
+ FMT_FOR_EACH1(f, x0), f(x1, 1)
+#define FMT_FOR_EACH3(f, x0, x1, x2) \
+ FMT_FOR_EACH2(f, x0 ,x1), f(x2, 2)
+#define FMT_FOR_EACH4(f, x0, x1, x2, x3) \
+ FMT_FOR_EACH3(f, x0, x1, x2), f(x3, 3)
+#define FMT_FOR_EACH5(f, x0, x1, x2, x3, x4) \
+ FMT_FOR_EACH4(f, x0, x1, x2, x3), f(x4, 4)
+#define FMT_FOR_EACH6(f, x0, x1, x2, x3, x4, x5) \
+ FMT_FOR_EACH5(f, x0, x1, x2, x3, x4), f(x5, 5)
+#define FMT_FOR_EACH7(f, x0, x1, x2, x3, x4, x5, x6) \
+ FMT_FOR_EACH6(f, x0, x1, x2, x3, x4, x5), f(x6, 6)
+#define FMT_FOR_EACH8(f, x0, x1, x2, x3, x4, x5, x6, x7) \
+ FMT_FOR_EACH7(f, x0, x1, x2, x3, x4, x5, x6), f(x7, 7)
+#define FMT_FOR_EACH9(f, x0, x1, x2, x3, x4, x5, x6, x7, x8) \
+ FMT_FOR_EACH8(f, x0, x1, x2, x3, x4, x5, x6, x7), f(x8, 8)
+#define FMT_FOR_EACH10(f, x0, x1, x2, x3, x4, x5, x6, x7, x8, x9) \
+ FMT_FOR_EACH9(f, x0, x1, x2, x3, x4, x5, x6, x7, x8), f(x9, 9)
+
+/**
+ An error returned by an operating system or a language runtime,
+ for example a file opening error.
+*/
+class SystemError : public internal::RuntimeError {
+ private:
+ void init(int err_code, CStringRef format_str, ArgList args);
+
+ protected:
+ int error_code_;
+
+ typedef char Char; // For FMT_VARIADIC_CTOR.
+
+ SystemError() {}
+
+ public:
+ /**
+ \rst
+ Constructs a :class:`fmt::SystemError` object with a description
+ formatted with `fmt::format_system_error`. *message* and additional
+ arguments passed into the constructor are formatted similarly to
+ `fmt::format`.
+
+ **Example**::
+
+ // This throws a SystemError with the description
+ // cannot open file 'madeup': No such file or directory
+ // or similar (system message may vary).
+ const char *filename = "madeup";
+ std::FILE *file = std::fopen(filename, "r");
+ if (!file)
+ throw fmt::SystemError(errno, "cannot open file '{}'", filename);
+ \endrst
+ */
+ SystemError(int error_code, CStringRef message) {
+ init(error_code, message, ArgList());
+ }
+ FMT_VARIADIC_CTOR(SystemError, init, int, CStringRef)
+
+ ~SystemError() throw();
+
+ int error_code() const { return error_code_; }
+};
+
+/**
+ \rst
+ Formats an error returned by an operating system or a language runtime,
+ for example a file opening error, and writes it to *out* in the following
+ form:
+
+ .. parsed-literal::
+ *<message>*: *<system-message>*
+
+ where *<message>* is the passed message and *<system-message>* is
+ the system message corresponding to the error code.
+ *error_code* is a system error code as given by ``errno``.
+ If *error_code* is not a valid error code such as -1, the system message
+ may look like "Unknown error -1" and is platform-dependent.
+ \endrst
+ */
+FMT_API void format_system_error(fmt::Writer &out, int error_code,
+ fmt::StringRef message) FMT_NOEXCEPT;
+
+/**
+ \rst
+ This template provides operations for formatting and writing data into
+ a character stream. The output is stored in a buffer provided by a subclass
+ such as :class:`fmt::BasicMemoryWriter`.
+
+ You can use one of the following typedefs for common character types:
+
+ +---------+----------------------+
+ | Type | Definition |
+ +=========+======================+
+ | Writer | BasicWriter<char> |
+ +---------+----------------------+
+ | WWriter | BasicWriter<wchar_t> |
+ +---------+----------------------+
+
+ \endrst
+ */
+template <typename Char>
+class BasicWriter {
+ private:
+ // Output buffer.
+ Buffer<Char> &buffer_;
+
+ FMT_DISALLOW_COPY_AND_ASSIGN(BasicWriter);
+
+ typedef typename internal::CharTraits<Char>::CharPtr CharPtr;
+
+#if FMT_SECURE_SCL
+ // Returns pointer value.
+ static Char *get(CharPtr p) { return p.base(); }
+#else
+ static Char *get(Char *p) { return p; }
+#endif
+
+ // Fills the padding around the content and returns the pointer to the
+ // content area.
+ static CharPtr fill_padding(CharPtr buffer,
+ unsigned total_size, std::size_t content_size, wchar_t fill);
+
+ // Grows the buffer by n characters and returns a pointer to the newly
+ // allocated area.
+ CharPtr grow_buffer(std::size_t n) {
+ std::size_t size = buffer_.size();
+ buffer_.resize(size + n);
+ return internal::make_ptr(&buffer_[size], n);
+ }
+
+ // Writes an unsigned decimal integer.
+ template <typename UInt>
+ Char *write_unsigned_decimal(UInt value, unsigned prefix_size = 0) {
+ unsigned num_digits = internal::count_digits(value);
+ Char *ptr = get(grow_buffer(prefix_size + num_digits));
+ internal::format_decimal(ptr + prefix_size, value, num_digits);
+ return ptr;
+ }
+
+ // Writes a decimal integer.
+ template <typename Int>
+ void write_decimal(Int value) {
+ typedef typename internal::IntTraits<Int>::MainType MainType;
+ MainType abs_value = static_cast<MainType>(value);
+ if (internal::is_negative(value)) {
+ abs_value = 0 - abs_value;
+ *write_unsigned_decimal(abs_value, 1) = '-';
+ } else {
+ write_unsigned_decimal(abs_value, 0);
+ }
+ }
+
+ // Prepare a buffer for integer formatting.
+ CharPtr prepare_int_buffer(unsigned num_digits,
+ const EmptySpec &, const char *prefix, unsigned prefix_size) {
+ unsigned size = prefix_size + num_digits;
+ CharPtr p = grow_buffer(size);
+ std::uninitialized_copy(prefix, prefix + prefix_size, p);
+ return p + size - 1;
+ }
+
+ template <typename Spec>
+ CharPtr prepare_int_buffer(unsigned num_digits,
+ const Spec &spec, const char *prefix, unsigned prefix_size);
+
+ // Formats an integer.
+ template <typename T, typename Spec>
+ void write_int(T value, Spec spec);
+
+ // Formats a floating-point number (double or long double).
+ template <typename T>
+ void write_double(T value, const FormatSpec &spec);
+
+ // Writes a formatted string.
+ template <typename StrChar>
+ CharPtr write_str(const StrChar *s, std::size_t size, const AlignSpec &spec);
+
+ template <typename StrChar>
+ void write_str(const internal::Arg::StringValue<StrChar> &str,
+ const FormatSpec &spec);
+
+ // This following methods are private to disallow writing wide characters
+ // and strings to a char stream. If you want to print a wide string as a
+ // pointer as std::ostream does, cast it to const void*.
+ // Do not implement!
+ void operator<<(typename internal::WCharHelper<wchar_t, Char>::Unsupported);
+ void operator<<(
+ typename internal::WCharHelper<const wchar_t *, Char>::Unsupported);
+
+ // Appends floating-point length specifier to the format string.
+ // The second argument is only used for overload resolution.
+ void append_float_length(Char *&format_ptr, long double) {
+ *format_ptr++ = 'L';
+ }
+
+ template<typename T>
+ void append_float_length(Char *&, T) {}
+
+ template <typename Impl, typename Char_>
+ friend class internal::ArgFormatterBase;
+
+ template <typename Impl, typename Char_>
+ friend class BasicPrintfArgFormatter;
+
+ protected:
+ /**
+ Constructs a ``BasicWriter`` object.
+ */
+ explicit BasicWriter(Buffer<Char> &b) : buffer_(b) {}
+
+ public:
+ /**
+ \rst
+ Destroys a ``BasicWriter`` object.
+ \endrst
+ */
+ virtual ~BasicWriter() {}
+
+ /**
+ Returns the total number of characters written.
+ */
+ std::size_t size() const { return buffer_.size(); }
+
+ /**
+ Returns a pointer to the output buffer content. No terminating null
+ character is appended.
+ */
+ const Char *data() const FMT_NOEXCEPT { return &buffer_[0]; }
+
+ /**
+ Returns a pointer to the output buffer content with terminating null
+ character appended.
+ */
+ const Char *c_str() const {
+ std::size_t size = buffer_.size();
+ buffer_.reserve(size + 1);
+ buffer_[size] = '\0';
+ return &buffer_[0];
+ }
+
+ /**
+ \rst
+ Returns the content of the output buffer as an `std::string`.
+ \endrst
+ */
+ std::basic_string<Char> str() const {
+ return std::basic_string<Char>(&buffer_[0], buffer_.size());
+ }
+
+ /**
+ \rst
+ Writes formatted data.
+
+ *args* is an argument list representing arbitrary arguments.
+
+ **Example**::
+
+ MemoryWriter out;
+ out.write("Current point:\n");
+ out.write("({:+f}, {:+f})", -3.14, 3.14);
+
+ This will write the following output to the ``out`` object:
+
+ .. code-block:: none
+
+ Current point:
+ (-3.140000, +3.140000)
+
+ The output can be accessed using :func:`data()`, :func:`c_str` or
+ :func:`str` methods.
+
+ See also :ref:`syntax`.
+ \endrst
+ */
+ void write(BasicCStringRef<Char> format, ArgList args) {
+ BasicFormatter<Char>(args, *this).format(format);
+ }
+ FMT_VARIADIC_VOID(write, BasicCStringRef<Char>)
+
+ BasicWriter &operator<<(int value) {
+ write_decimal(value);
+ return *this;
+ }
+ BasicWriter &operator<<(unsigned value) {
+ return *this << IntFormatSpec<unsigned>(value);
+ }
+ BasicWriter &operator<<(long value) {
+ write_decimal(value);
+ return *this;
+ }
+ BasicWriter &operator<<(unsigned long value) {
+ return *this << IntFormatSpec<unsigned long>(value);
+ }
+ BasicWriter &operator<<(LongLong value) {
+ write_decimal(value);
+ return *this;
+ }
+
+ /**
+ \rst
+ Formats *value* and writes it to the stream.
+ \endrst
+ */
+ BasicWriter &operator<<(ULongLong value) {
+ return *this << IntFormatSpec<ULongLong>(value);
+ }
+
+ BasicWriter &operator<<(double value) {
+ write_double(value, FormatSpec());
+ return *this;
+ }
+
+ /**
+ \rst
+ Formats *value* using the general format for floating-point numbers
+ (``'g'``) and writes it to the stream.
+ \endrst
+ */
+ BasicWriter &operator<<(long double value) {
+ write_double(value, FormatSpec());
+ return *this;
+ }
+
+ /**
+ Writes a character to the stream.
+ */
+ BasicWriter &operator<<(char value) {
+ buffer_.push_back(value);
+ return *this;
+ }
+
+ BasicWriter &operator<<(
+ typename internal::WCharHelper<wchar_t, Char>::Supported value) {
+ buffer_.push_back(value);
+ return *this;
+ }
+
+ /**
+ \rst
+ Writes *value* to the stream.
+ \endrst
+ */
+ BasicWriter &operator<<(fmt::BasicStringRef<Char> value) {
+ const Char *str = value.data();
+ buffer_.append(str, str + value.size());
+ return *this;
+ }
+
+ BasicWriter &operator<<(
+ typename internal::WCharHelper<StringRef, Char>::Supported value) {
+ const char *str = value.data();
+ buffer_.append(str, str + value.size());
+ return *this;
+ }
+
+ template <typename T, typename Spec, typename FillChar>
+ BasicWriter &operator<<(IntFormatSpec<T, Spec, FillChar> spec) {
+ internal::CharTraits<Char>::convert(FillChar());
+ write_int(spec.value(), spec);
+ return *this;
+ }
+
+ template <typename StrChar>
+ BasicWriter &operator<<(const StrFormatSpec<StrChar> &spec) {
+ const StrChar *s = spec.str();
+ write_str(s, std::char_traits<Char>::length(s), spec);
+ return *this;
+ }
+
+ void clear() FMT_NOEXCEPT { buffer_.clear(); }
+
+ Buffer<Char> &buffer() FMT_NOEXCEPT { return buffer_; }
+};
+
+template <typename Char>
+template <typename StrChar>
+typename BasicWriter<Char>::CharPtr BasicWriter<Char>::write_str(
+ const StrChar *s, std::size_t size, const AlignSpec &spec) {
+ CharPtr out = CharPtr();
+ if (spec.width() > size) {
+ out = grow_buffer(spec.width());
+ Char fill = internal::CharTraits<Char>::cast(spec.fill());
+ if (spec.align() == ALIGN_RIGHT) {
+ std::uninitialized_fill_n(out, spec.width() - size, fill);
+ out += spec.width() - size;
+ } else if (spec.align() == ALIGN_CENTER) {
+ out = fill_padding(out, spec.width(), size, fill);
+ } else {
+ std::uninitialized_fill_n(out + size, spec.width() - size, fill);
+ }
+ } else {
+ out = grow_buffer(size);
+ }
+ std::uninitialized_copy(s, s + size, out);
+ return out;
+}
+
+template <typename Char>
+template <typename StrChar>
+void BasicWriter<Char>::write_str(
+ const internal::Arg::StringValue<StrChar> &s, const FormatSpec &spec) {
+ // Check if StrChar is convertible to Char.
+ internal::CharTraits<Char>::convert(StrChar());
+ if (spec.type_ && spec.type_ != 's')
+ internal::report_unknown_type(spec.type_, "string");
+ const StrChar *str_value = s.value;
+ std::size_t str_size = s.size;
+ if (str_size == 0) {
+ if (!str_value) {
+ FMT_THROW(FormatError("string pointer is null"));
+ }
+ }
+ std::size_t precision = static_cast<std::size_t>(spec.precision_);
+ if (spec.precision_ >= 0 && precision < str_size)
+ str_size = precision;
+ write_str(str_value, str_size, spec);
+}
+
+template <typename Char>
+typename BasicWriter<Char>::CharPtr
+ BasicWriter<Char>::fill_padding(
+ CharPtr buffer, unsigned total_size,
+ std::size_t content_size, wchar_t fill) {
+ std::size_t padding = total_size - content_size;
+ std::size_t left_padding = padding / 2;
+ Char fill_char = internal::CharTraits<Char>::cast(fill);
+ std::uninitialized_fill_n(buffer, left_padding, fill_char);
+ buffer += left_padding;
+ CharPtr content = buffer;
+ std::uninitialized_fill_n(buffer + content_size,
+ padding - left_padding, fill_char);
+ return content;
+}
+
+template <typename Char>
+template <typename Spec>
+typename BasicWriter<Char>::CharPtr
+ BasicWriter<Char>::prepare_int_buffer(
+ unsigned num_digits, const Spec &spec,
+ const char *prefix, unsigned prefix_size) {
+ unsigned width = spec.width();
+ Alignment align = spec.align();
+ Char fill = internal::CharTraits<Char>::cast(spec.fill());
+ if (spec.precision() > static_cast<int>(num_digits)) {
+ // Octal prefix '0' is counted as a digit, so ignore it if precision
+ // is specified.
+ if (prefix_size > 0 && prefix[prefix_size - 1] == '0')
+ --prefix_size;
+ unsigned number_size =
+ prefix_size + internal::to_unsigned(spec.precision());
+ AlignSpec subspec(number_size, '0', ALIGN_NUMERIC);
+ if (number_size >= width)
+ return prepare_int_buffer(num_digits, subspec, prefix, prefix_size);
+ buffer_.reserve(width);
+ unsigned fill_size = width - number_size;
+ if (align != ALIGN_LEFT) {
+ CharPtr p = grow_buffer(fill_size);
+ std::uninitialized_fill(p, p + fill_size, fill);
+ }
+ CharPtr result = prepare_int_buffer(
+ num_digits, subspec, prefix, prefix_size);
+ if (align == ALIGN_LEFT) {
+ CharPtr p = grow_buffer(fill_size);
+ std::uninitialized_fill(p, p + fill_size, fill);
+ }
+ return result;
+ }
+ unsigned size = prefix_size + num_digits;
+ if (width <= size) {
+ CharPtr p = grow_buffer(size);
+ std::uninitialized_copy(prefix, prefix + prefix_size, p);
+ return p + size - 1;
+ }
+ CharPtr p = grow_buffer(width);
+ CharPtr end = p + width;
+ if (align == ALIGN_LEFT) {
+ std::uninitialized_copy(prefix, prefix + prefix_size, p);
+ p += size;
+ std::uninitialized_fill(p, end, fill);
+ } else if (align == ALIGN_CENTER) {
+ p = fill_padding(p, width, size, fill);
+ std::uninitialized_copy(prefix, prefix + prefix_size, p);
+ p += size;
+ } else {
+ if (align == ALIGN_NUMERIC) {
+ if (prefix_size != 0) {
+ p = std::uninitialized_copy(prefix, prefix + prefix_size, p);
+ size -= prefix_size;
+ }
+ } else {
+ std::uninitialized_copy(prefix, prefix + prefix_size, end - size);
+ }
+ std::uninitialized_fill(p, end - size, fill);
+ p = end;
+ }
+ return p - 1;
+}
+
+template <typename Char>
+template <typename T, typename Spec>
+void BasicWriter<Char>::write_int(T value, Spec spec) {
+ unsigned prefix_size = 0;
+ typedef typename internal::IntTraits<T>::MainType UnsignedType;
+ UnsignedType abs_value = static_cast<UnsignedType>(value);
+ char prefix[4] = "";
+ if (internal::is_negative(value)) {
+ prefix[0] = '-';
+ ++prefix_size;
+ abs_value = 0 - abs_value;
+ } else if (spec.flag(SIGN_FLAG)) {
+ prefix[0] = spec.flag(PLUS_FLAG) ? '+' : ' ';
+ ++prefix_size;
+ }
+ switch (spec.type()) {
+ case 0: case 'd': {
+ unsigned num_digits = internal::count_digits(abs_value);
+ CharPtr p = prepare_int_buffer(num_digits, spec, prefix, prefix_size) + 1;
+ internal::format_decimal(get(p), abs_value, 0);
+ break;
+ }
+ case 'x': case 'X': {
+ UnsignedType n = abs_value;
+ if (spec.flag(HASH_FLAG)) {
+ prefix[prefix_size++] = '0';
+ prefix[prefix_size++] = spec.type();
+ }
+ unsigned num_digits = 0;
+ do {
+ ++num_digits;
+ } while ((n >>= 4) != 0);
+ Char *p = get(prepare_int_buffer(
+ num_digits, spec, prefix, prefix_size));
+ n = abs_value;
+ const char *digits = spec.type() == 'x' ?
+ "0123456789abcdef" : "0123456789ABCDEF";
+ do {
+ *p-- = digits[n & 0xf];
+ } while ((n >>= 4) != 0);
+ break;
+ }
+ case 'b': case 'B': {
+ UnsignedType n = abs_value;
+ if (spec.flag(HASH_FLAG)) {
+ prefix[prefix_size++] = '0';
+ prefix[prefix_size++] = spec.type();
+ }
+ unsigned num_digits = 0;
+ do {
+ ++num_digits;
+ } while ((n >>= 1) != 0);
+ Char *p = get(prepare_int_buffer(num_digits, spec, prefix, prefix_size));
+ n = abs_value;
+ do {
+ *p-- = static_cast<Char>('0' + (n & 1));
+ } while ((n >>= 1) != 0);
+ break;
+ }
+ case 'o': {
+ UnsignedType n = abs_value;
+ if (spec.flag(HASH_FLAG))
+ prefix[prefix_size++] = '0';
+ unsigned num_digits = 0;
+ do {
+ ++num_digits;
+ } while ((n >>= 3) != 0);
+ Char *p = get(prepare_int_buffer(num_digits, spec, prefix, prefix_size));
+ n = abs_value;
+ do {
+ *p-- = static_cast<Char>('0' + (n & 7));
+ } while ((n >>= 3) != 0);
+ break;
+ }
+ case 'n': {
+ unsigned num_digits = internal::count_digits(abs_value);
+ fmt::StringRef sep = internal::thousands_sep(std::localeconv());
+ unsigned size = static_cast<unsigned>(
+ num_digits + sep.size() * ((num_digits - 1) / 3));
+ CharPtr p = prepare_int_buffer(size, spec, prefix, prefix_size) + 1;
+ internal::format_decimal(get(p), abs_value, 0, internal::ThousandsSep(sep));
+ break;
+ }
+ default:
+ internal::report_unknown_type(
+ spec.type(), spec.flag(CHAR_FLAG) ? "char" : "integer");
+ break;
+ }
+}
+
+template <typename Char>
+template <typename T>
+void BasicWriter<Char>::write_double(T value, const FormatSpec &spec) {
+ // Check type.
+ char type = spec.type();
+ bool upper = false;
+ switch (type) {
+ case 0:
+ type = 'g';
+ break;
+ case 'e': case 'f': case 'g': case 'a':
+ break;
+ case 'F':
+#if FMT_MSC_VER
+ // MSVC's printf doesn't support 'F'.
+ type = 'f';
+#endif
+ // Fall through.
+ case 'E': case 'G': case 'A':
+ upper = true;
+ break;
+ default:
+ internal::report_unknown_type(type, "double");
+ break;
+ }
+
+ char sign = 0;
+ // Use isnegative instead of value < 0 because the latter is always
+ // false for NaN.
+ if (internal::FPUtil::isnegative(static_cast<double>(value))) {
+ sign = '-';
+ value = -value;
+ } else if (spec.flag(SIGN_FLAG)) {
+ sign = spec.flag(PLUS_FLAG) ? '+' : ' ';
+ }
+
+ if (internal::FPUtil::isnotanumber(value)) {
+ // Format NaN ourselves because sprintf's output is not consistent
+ // across platforms.
+ std::size_t nan_size = 4;
+ const char *nan = upper ? " NAN" : " nan";
+ if (!sign) {
+ --nan_size;
+ ++nan;
+ }
+ CharPtr out = write_str(nan, nan_size, spec);
+ if (sign)
+ *out = sign;
+ return;
+ }
+
+ if (internal::FPUtil::isinfinity(value)) {
+ // Format infinity ourselves because sprintf's output is not consistent
+ // across platforms.
+ std::size_t inf_size = 4;
+ const char *inf = upper ? " INF" : " inf";
+ if (!sign) {
+ --inf_size;
+ ++inf;
+ }
+ CharPtr out = write_str(inf, inf_size, spec);
+ if (sign)
+ *out = sign;
+ return;
+ }
+
+ std::size_t offset = buffer_.size();
+ unsigned width = spec.width();
+ if (sign) {
+ buffer_.reserve(buffer_.size() + (width > 1u ? width : 1u));
+ if (width > 0)
+ --width;
+ ++offset;
+ }
+
+ // Build format string.
+ enum { MAX_FORMAT_SIZE = 10}; // longest format: %#-*.*Lg
+ Char format[MAX_FORMAT_SIZE];
+ Char *format_ptr = format;
+ *format_ptr++ = '%';
+ unsigned width_for_sprintf = width;
+ if (spec.flag(HASH_FLAG))
+ *format_ptr++ = '#';
+ if (spec.align() == ALIGN_CENTER) {
+ width_for_sprintf = 0;
+ } else {
+ if (spec.align() == ALIGN_LEFT)
+ *format_ptr++ = '-';
+ if (width != 0)
+ *format_ptr++ = '*';
+ }
+ if (spec.precision() >= 0) {
+ *format_ptr++ = '.';
+ *format_ptr++ = '*';
+ }
+
+ append_float_length(format_ptr, value);
+ *format_ptr++ = type;
+ *format_ptr = '\0';
+
+ // Format using snprintf.
+ Char fill = internal::CharTraits<Char>::cast(spec.fill());
+ unsigned n = 0;
+ Char *start = 0;
+ for (;;) {
+ std::size_t buffer_size = buffer_.capacity() - offset;
+#if FMT_MSC_VER
+ // MSVC's vsnprintf_s doesn't work with zero size, so reserve
+ // space for at least one extra character to make the size non-zero.
+ // Note that the buffer's capacity will increase by more than 1.
+ if (buffer_size == 0) {
+ buffer_.reserve(offset + 1);
+ buffer_size = buffer_.capacity() - offset;
+ }
+#endif
+ start = &buffer_[offset];
+ int result = internal::CharTraits<Char>::format_float(
+ start, buffer_size, format, width_for_sprintf, spec.precision(), value);
+ if (result >= 0) {
+ n = internal::to_unsigned(result);
+ if (offset + n < buffer_.capacity())
+ break; // The buffer is large enough - continue with formatting.
+ buffer_.reserve(offset + n + 1);
+ } else {
+ // If result is negative we ask to increase the capacity by at least 1,
+ // but as std::vector, the buffer grows exponentially.
+ buffer_.reserve(buffer_.capacity() + 1);
+ }
+ }
+ if (sign) {
+ if ((spec.align() != ALIGN_RIGHT && spec.align() != ALIGN_DEFAULT) ||
+ *start != ' ') {
+ *(start - 1) = sign;
+ sign = 0;
+ } else {
+ *(start - 1) = fill;
+ }
+ ++n;
+ }
+ if (spec.align() == ALIGN_CENTER && spec.width() > n) {
+ width = spec.width();
+ CharPtr p = grow_buffer(width);
+ std::memmove(get(p) + (width - n) / 2, get(p), n * sizeof(Char));
+ fill_padding(p, spec.width(), n, fill);
+ return;
+ }
+ if (spec.fill() != ' ' || sign) {
+ while (*start == ' ')
+ *start++ = fill;
+ if (sign)
+ *(start - 1) = sign;
+ }
+ grow_buffer(n);
+}
+
+/**
+ \rst
+ This class template provides operations for formatting and writing data
+ into a character stream. The output is stored in a memory buffer that grows
+ dynamically.
+
+ You can use one of the following typedefs for common character types
+ and the standard allocator:
+
+ +---------------+-----------------------------------------------------+
+ | Type | Definition |
+ +===============+=====================================================+
+ | MemoryWriter | BasicMemoryWriter<char, std::allocator<char>> |
+ +---------------+-----------------------------------------------------+
+ | WMemoryWriter | BasicMemoryWriter<wchar_t, std::allocator<wchar_t>> |
+ +---------------+-----------------------------------------------------+
+
+ **Example**::
+
+ MemoryWriter out;
+ out << "The answer is " << 42 << "\n";
+ out.write("({:+f}, {:+f})", -3.14, 3.14);
+
+ This will write the following output to the ``out`` object:
+
+ .. code-block:: none
+
+ The answer is 42
+ (-3.140000, +3.140000)
+
+ The output can be converted to an ``std::string`` with ``out.str()`` or
+ accessed as a C string with ``out.c_str()``.
+ \endrst
+ */
+template <typename Char, typename Allocator = std::allocator<Char> >
+class BasicMemoryWriter : public BasicWriter<Char> {
+ private:
+ internal::MemoryBuffer<Char, internal::INLINE_BUFFER_SIZE, Allocator> buffer_;
+
+ public:
+ explicit BasicMemoryWriter(const Allocator& alloc = Allocator())
+ : BasicWriter<Char>(buffer_), buffer_(alloc) {}
+
+#if FMT_USE_RVALUE_REFERENCES
+ /**
+ \rst
+ Constructs a :class:`fmt::BasicMemoryWriter` object moving the content
+ of the other object to it.
+ \endrst
+ */
+ BasicMemoryWriter(BasicMemoryWriter &&other)
+ : BasicWriter<Char>(buffer_), buffer_(std::move(other.buffer_)) {
+ }
+
+ /**
+ \rst
+ Moves the content of the other ``BasicMemoryWriter`` object to this one.
+ \endrst
+ */
+ BasicMemoryWriter &operator=(BasicMemoryWriter &&other) {
+ buffer_ = std::move(other.buffer_);
+ return *this;
+ }
+#endif
+};
+
+typedef BasicMemoryWriter<char> MemoryWriter;
+typedef BasicMemoryWriter<wchar_t> WMemoryWriter;
+
+/**
+ \rst
+ This class template provides operations for formatting and writing data
+ into a fixed-size array. For writing into a dynamically growing buffer
+ use :class:`fmt::BasicMemoryWriter`.
+
+ Any write method will throw ``std::runtime_error`` if the output doesn't fit
+ into the array.
+
+ You can use one of the following typedefs for common character types:
+
+ +--------------+---------------------------+
+ | Type | Definition |
+ +==============+===========================+
+ | ArrayWriter | BasicArrayWriter<char> |
+ +--------------+---------------------------+
+ | WArrayWriter | BasicArrayWriter<wchar_t> |
+ +--------------+---------------------------+
+ \endrst
+ */
+template <typename Char>
+class BasicArrayWriter : public BasicWriter<Char> {
+ private:
+ internal::FixedBuffer<Char> buffer_;
+
+ public:
+ /**
+ \rst
+ Constructs a :class:`fmt::BasicArrayWriter` object for *array* of the
+ given size.
+ \endrst
+ */
+ BasicArrayWriter(Char *array, std::size_t size)
+ : BasicWriter<Char>(buffer_), buffer_(array, size) {}
+
+ /**
+ \rst
+ Constructs a :class:`fmt::BasicArrayWriter` object for *array* of the
+ size known at compile time.
+ \endrst
+ */
+ template <std::size_t SIZE>
+ explicit BasicArrayWriter(Char (&array)[SIZE])
+ : BasicWriter<Char>(buffer_), buffer_(array, SIZE) {}
+};
+
+typedef BasicArrayWriter<char> ArrayWriter;
+typedef BasicArrayWriter<wchar_t> WArrayWriter;
+
+// Reports a system error without throwing an exception.
+// Can be used to report errors from destructors.
+FMT_API void report_system_error(int error_code,
+ StringRef message) FMT_NOEXCEPT;
+
+#if FMT_USE_WINDOWS_H
+
+/** A Windows error. */
+class WindowsError : public SystemError {
+ private:
+ FMT_API void init(int error_code, CStringRef format_str, ArgList args);
+
+ public:
+ /**
+ \rst
+ Constructs a :class:`fmt::WindowsError` 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 WindowsError 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::WindowsError(GetLastError(),
+ "cannot open file '{}'", filename);
+ }
+ \endrst
+ */
+ WindowsError(int error_code, CStringRef message) {
+ init(error_code, message, ArgList());
+ }
+ FMT_VARIADIC_CTOR(WindowsError, init, int, CStringRef)
+};
+
+// 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,
+ StringRef message) FMT_NOEXCEPT;
+
+#endif
+
+enum Color { BLACK, RED, GREEN, YELLOW, BLUE, MAGENTA, CYAN, WHITE };
+
+/**
+ Formats a string and prints it to stdout using ANSI escape sequences
+ to specify color (experimental).
+ Example:
+ print_colored(fmt::RED, "Elapsed time: {0:.2f} seconds", 1.23);
+ */
+FMT_API void print_colored(Color c, CStringRef format, ArgList args);
+
+/**
+ \rst
+ Formats arguments and returns the result as a string.
+
+ **Example**::
+
+ std::string message = format("The answer is {}", 42);
+ \endrst
+*/
+inline std::string format(CStringRef format_str, ArgList args) {
+ MemoryWriter w;
+ w.write(format_str, args);
+ return w.str();
+}
+
+inline std::wstring format(WCStringRef format_str, ArgList args) {
+ WMemoryWriter w;
+ w.write(format_str, args);
+ return w.str();
+}
+
+/**
+ \rst
+ Prints formatted data to the file *f*.
+
+ **Example**::
+
+ print(stderr, "Don't {}!", "panic");
+ \endrst
+ */
+FMT_API void print(std::FILE *f, CStringRef format_str, ArgList args);
+
+/**
+ \rst
+ Prints formatted data to ``stdout``.
+
+ **Example**::
+
+ print("Elapsed time: {0:.2f} seconds", 1.23);
+ \endrst
+ */
+FMT_API void print(CStringRef format_str, ArgList args);
+
+/**
+ Fast integer formatter.
+ */
+class FormatInt {
+ private:
+ // Buffer should be large enough to hold all digits (digits10 + 1),
+ // a sign and a null character.
+ enum {BUFFER_SIZE = std::numeric_limits<ULongLong>::digits10 + 3};
+ mutable char buffer_[BUFFER_SIZE];
+ char *str_;
+
+ // Formats value in reverse and returns the number of digits.
+ char *format_decimal(ULongLong value) {
+ char *buffer_end = buffer_ + BUFFER_SIZE - 1;
+ while (value >= 100) {
+ // Integer division is slow so do it for a group of two digits instead
+ // of for every digit. The idea comes from the talk by Alexandrescu
+ // "Three Optimization Tips for C++". See speed-test for a comparison.
+ unsigned index = static_cast<unsigned>((value % 100) * 2);
+ value /= 100;
+ *--buffer_end = internal::Data::DIGITS[index + 1];
+ *--buffer_end = internal::Data::DIGITS[index];
+ }
+ if (value < 10) {
+ *--buffer_end = static_cast<char>('0' + value);
+ return buffer_end;
+ }
+ unsigned index = static_cast<unsigned>(value * 2);
+ *--buffer_end = internal::Data::DIGITS[index + 1];
+ *--buffer_end = internal::Data::DIGITS[index];
+ return buffer_end;
+ }
+
+ void FormatSigned(LongLong value) {
+ ULongLong abs_value = static_cast<ULongLong>(value);
+ bool negative = value < 0;
+ if (negative)
+ abs_value = 0 - abs_value;
+ str_ = format_decimal(abs_value);
+ if (negative)
+ *--str_ = '-';
+ }
+
+ public:
+ explicit FormatInt(int value) { FormatSigned(value); }
+ explicit FormatInt(long value) { FormatSigned(value); }
+ explicit FormatInt(LongLong value) { FormatSigned(value); }
+ explicit FormatInt(unsigned value) : str_(format_decimal(value)) {}
+ explicit FormatInt(unsigned long value) : str_(format_decimal(value)) {}
+ explicit FormatInt(ULongLong value) : str_(format_decimal(value)) {}
+
+ /** Returns the number of characters written to the output buffer. */
+ std::size_t size() const {
+ return internal::to_unsigned(buffer_ - str_ + BUFFER_SIZE - 1);
+ }
+
+ /**
+ Returns a pointer to the output buffer content. No terminating null
+ character is appended.
+ */
+ const char *data() const { return str_; }
+
+ /**
+ Returns a pointer to the output buffer content with terminating null
+ character appended.
+ */
+ const char *c_str() const {
+ buffer_[BUFFER_SIZE - 1] = '\0';
+ return str_;
+ }
+
+ /**
+ \rst
+ Returns the content of the output buffer as an ``std::string``.
+ \endrst
+ */
+ std::string str() const { return std::string(str_, size()); }
+};
+
+// Formats a decimal integer value writing into buffer and returns
+// a pointer to the end of the formatted string. This function doesn't
+// write a terminating null character.
+template <typename T>
+inline void format_decimal(char *&buffer, T value) {
+ typedef typename internal::IntTraits<T>::MainType MainType;
+ MainType abs_value = static_cast<MainType>(value);
+ if (internal::is_negative(value)) {
+ *buffer++ = '-';
+ abs_value = 0 - abs_value;
+ }
+ if (abs_value < 100) {
+ if (abs_value < 10) {
+ *buffer++ = static_cast<char>('0' + abs_value);
+ return;
+ }
+ unsigned index = static_cast<unsigned>(abs_value * 2);
+ *buffer++ = internal::Data::DIGITS[index];
+ *buffer++ = internal::Data::DIGITS[index + 1];
+ return;
+ }
+ unsigned num_digits = internal::count_digits(abs_value);
+ internal::format_decimal(buffer, abs_value, num_digits);
+ buffer += num_digits;
+}
+
+/**
+ \rst
+ Returns a named argument for formatting functions.
+
+ **Example**::
+
+ print("Elapsed time: {s:.2f} seconds", arg("s", 1.23));
+
+ \endrst
+ */
+template <typename T>
+inline internal::NamedArg<char> arg(StringRef name, const T &arg) {
+ return internal::NamedArg<char>(name, arg);
+}
+
+template <typename T>
+inline internal::NamedArg<wchar_t> arg(WStringRef name, const T &arg) {
+ return internal::NamedArg<wchar_t>(name, arg);
+}
+
+// The following two functions are deleted intentionally to disable
+// nested named arguments as in ``format("{}", arg("a", arg("b", 42)))``.
+template <typename Char>
+void arg(StringRef, const internal::NamedArg<Char>&) FMT_DELETED_OR_UNDEFINED;
+template <typename Char>
+void arg(WStringRef, const internal::NamedArg<Char>&) FMT_DELETED_OR_UNDEFINED;
+}
+
+#if FMT_GCC_VERSION
+// Use the system_header pragma to suppress warnings about variadic macros
+// because suppressing -Wvariadic-macros with the diagnostic pragma doesn't
+// work. It is used at the end because we want to suppress as little warnings
+// as possible.
+# pragma GCC system_header
+#endif
+
+// This is used to work around VC++ bugs in handling variadic macros.
+#define FMT_EXPAND(args) args
+
+// Returns the number of arguments.
+// Based on https://groups.google.com/forum/#!topic/comp.std.c/d-6Mj5Lko_s.
+#define FMT_NARG(...) FMT_NARG_(__VA_ARGS__, FMT_RSEQ_N())
+#define FMT_NARG_(...) FMT_EXPAND(FMT_ARG_N(__VA_ARGS__))
+#define FMT_ARG_N(_1, _2, _3, _4, _5, _6, _7, _8, _9, _10, N, ...) N
+#define FMT_RSEQ_N() 10, 9, 8, 7, 6, 5, 4, 3, 2, 1, 0
+
+#define FMT_CONCAT(a, b) a##b
+#define FMT_FOR_EACH_(N, f, ...) \
+ FMT_EXPAND(FMT_CONCAT(FMT_FOR_EACH, N)(f, __VA_ARGS__))
+#define FMT_FOR_EACH(f, ...) \
+ FMT_EXPAND(FMT_FOR_EACH_(FMT_NARG(__VA_ARGS__), f, __VA_ARGS__))
+
+#define FMT_ADD_ARG_NAME(type, index) type arg##index
+#define FMT_GET_ARG_NAME(type, index) arg##index
+
+#if FMT_USE_VARIADIC_TEMPLATES
+# define FMT_VARIADIC_(Char, ReturnType, func, call, ...) \
+ template <typename... Args> \
+ ReturnType func(FMT_FOR_EACH(FMT_ADD_ARG_NAME, __VA_ARGS__), \
+ const Args & ... args) { \
+ typedef fmt::internal::ArgArray<sizeof...(Args)> ArgArray; \
+ typename ArgArray::Type array{ \
+ ArgArray::template make<fmt::BasicFormatter<Char> >(args)...}; \
+ call(FMT_FOR_EACH(FMT_GET_ARG_NAME, __VA_ARGS__), \
+ fmt::ArgList(fmt::internal::make_type(args...), array)); \
+ }
+#else
+// Defines a wrapper for a function taking __VA_ARGS__ arguments
+// and n additional arguments of arbitrary types.
+# define FMT_WRAP(Char, ReturnType, func, call, n, ...) \
+ template <FMT_GEN(n, FMT_MAKE_TEMPLATE_ARG)> \
+ inline ReturnType func(FMT_FOR_EACH(FMT_ADD_ARG_NAME, __VA_ARGS__), \
+ FMT_GEN(n, FMT_MAKE_ARG)) { \
+ fmt::internal::ArgArray<n>::Type arr; \
+ FMT_GEN(n, FMT_ASSIGN_##Char); \
+ call(FMT_FOR_EACH(FMT_GET_ARG_NAME, __VA_ARGS__), fmt::ArgList( \
+ fmt::internal::make_type(FMT_GEN(n, FMT_MAKE_REF2)), arr)); \
+ }
+
+# define FMT_VARIADIC_(Char, ReturnType, func, call, ...) \
+ inline ReturnType func(FMT_FOR_EACH(FMT_ADD_ARG_NAME, __VA_ARGS__)) { \
+ call(FMT_FOR_EACH(FMT_GET_ARG_NAME, __VA_ARGS__), fmt::ArgList()); \
+ } \
+ FMT_WRAP(Char, ReturnType, func, call, 1, __VA_ARGS__) \
+ FMT_WRAP(Char, ReturnType, func, call, 2, __VA_ARGS__) \
+ FMT_WRAP(Char, ReturnType, func, call, 3, __VA_ARGS__) \
+ FMT_WRAP(Char, ReturnType, func, call, 4, __VA_ARGS__) \
+ FMT_WRAP(Char, ReturnType, func, call, 5, __VA_ARGS__) \
+ FMT_WRAP(Char, ReturnType, func, call, 6, __VA_ARGS__) \
+ FMT_WRAP(Char, ReturnType, func, call, 7, __VA_ARGS__) \
+ FMT_WRAP(Char, ReturnType, func, call, 8, __VA_ARGS__) \
+ FMT_WRAP(Char, ReturnType, func, call, 9, __VA_ARGS__) \
+ FMT_WRAP(Char, ReturnType, func, call, 10, __VA_ARGS__) \
+ FMT_WRAP(Char, ReturnType, func, call, 11, __VA_ARGS__) \
+ FMT_WRAP(Char, ReturnType, func, call, 12, __VA_ARGS__) \
+ FMT_WRAP(Char, ReturnType, func, call, 13, __VA_ARGS__) \
+ FMT_WRAP(Char, ReturnType, func, call, 14, __VA_ARGS__) \
+ FMT_WRAP(Char, ReturnType, func, call, 15, __VA_ARGS__)
+#endif // FMT_USE_VARIADIC_TEMPLATES
+
+/**
+ \rst
+ Defines a variadic function with the specified return type, function name
+ and argument types passed as variable arguments to this macro.
+
+ **Example**::
+
+ void print_error(const char *file, int line, const char *format,
+ fmt::ArgList args) {
+ fmt::print("{}: {}: ", file, line);
+ fmt::print(format, args);
+ }
+ FMT_VARIADIC(void, print_error, const char *, int, const char *)
+
+ ``FMT_VARIADIC`` is used for compatibility with legacy C++ compilers that
+ don't implement variadic templates. You don't have to use this macro if
+ you don't need legacy compiler support and can use variadic templates
+ directly::
+
+ template <typename... Args>
+ void print_error(const char *file, int line, const char *format,
+ const Args & ... args) {
+ fmt::print("{}: {}: ", file, line);
+ fmt::print(format, args...);
+ }
+ \endrst
+ */
+#define FMT_VARIADIC(ReturnType, func, ...) \
+ FMT_VARIADIC_(char, ReturnType, func, return func, __VA_ARGS__)
+
+#define FMT_VARIADIC_W(ReturnType, func, ...) \
+ FMT_VARIADIC_(wchar_t, ReturnType, func, return func, __VA_ARGS__)
+
+#define FMT_CAPTURE_ARG_(id, index) ::fmt::arg(#id, id)
+
+#define FMT_CAPTURE_ARG_W_(id, index) ::fmt::arg(L###id, id)
+
+/**
+ \rst
+ Convenient macro to capture the arguments' names and values into several
+ ``fmt::arg(name, value)``.
+
+ **Example**::
+
+ int x = 1, y = 2;
+ print("point: ({x}, {y})", FMT_CAPTURE(x, y));
+ // same as:
+ // print("point: ({x}, {y})", arg("x", x), arg("y", y));
+
+ \endrst
+ */
+#define FMT_CAPTURE(...) FMT_FOR_EACH(FMT_CAPTURE_ARG_, __VA_ARGS__)
+
+#define FMT_CAPTURE_W(...) FMT_FOR_EACH(FMT_CAPTURE_ARG_W_, __VA_ARGS__)
+
+namespace fmt {
+FMT_VARIADIC(std::string, format, CStringRef)
+FMT_VARIADIC_W(std::wstring, format, WCStringRef)
+FMT_VARIADIC(void, print, CStringRef)
+FMT_VARIADIC(void, print, std::FILE *, CStringRef)
+FMT_VARIADIC(void, print_colored, Color, CStringRef)
+
+namespace internal {
+template <typename Char>
+inline bool is_name_start(Char c) {
+ return ('a' <= c && c <= 'z') || ('A' <= c && c <= 'Z') || '_' == c;
+}
+
+// Parses an unsigned integer advancing s to the end of the parsed input.
+// This function assumes that the first character of s is a digit.
+template <typename Char>
+unsigned parse_nonnegative_int(const Char *&s) {
+ assert('0' <= *s && *s <= '9');
+ unsigned value = 0;
+ do {
+ unsigned new_value = value * 10 + (*s++ - '0');
+ // Check if value wrapped around.
+ if (new_value < value) {
+ value = (std::numeric_limits<unsigned>::max)();
+ break;
+ }
+ value = new_value;
+ } while ('0' <= *s && *s <= '9');
+ // Convert to unsigned to prevent a warning.
+ unsigned max_int = (std::numeric_limits<int>::max)();
+ if (value > max_int)
+ FMT_THROW(FormatError("number is too big"));
+ return value;
+}
+
+inline void require_numeric_argument(const Arg &arg, char spec) {
+ if (arg.type > Arg::LAST_NUMERIC_TYPE) {
+ std::string message =
+ fmt::format("format specifier '{}' requires numeric argument", spec);
+ FMT_THROW(fmt::FormatError(message));
+ }
+}
+
+template <typename Char>
+void check_sign(const Char *&s, const Arg &arg) {
+ char sign = static_cast<char>(*s);
+ require_numeric_argument(arg, sign);
+ if (arg.type == Arg::UINT || arg.type == Arg::ULONG_LONG) {
+ FMT_THROW(FormatError(fmt::format(
+ "format specifier '{}' requires signed argument", sign)));
+ }
+ ++s;
+}
+} // namespace internal
+
+template <typename Char, typename AF>
+inline internal::Arg BasicFormatter<Char, AF>::get_arg(
+ BasicStringRef<Char> arg_name, const char *&error) {
+ if (check_no_auto_index(error)) {
+ map_.init(args());
+ const internal::Arg *arg = map_.find(arg_name);
+ if (arg)
+ return *arg;
+ error = "argument not found";
+ }
+ return internal::Arg();
+}
+
+template <typename Char, typename AF>
+inline internal::Arg BasicFormatter<Char, AF>::parse_arg_index(const Char *&s) {
+ const char *error = 0;
+ internal::Arg arg = *s < '0' || *s > '9' ?
+ next_arg(error) : get_arg(internal::parse_nonnegative_int(s), error);
+ if (error) {
+ FMT_THROW(FormatError(
+ *s != '}' && *s != ':' ? "invalid format string" : error));
+ }
+ return arg;
+}
+
+template <typename Char, typename AF>
+inline internal::Arg BasicFormatter<Char, AF>::parse_arg_name(const Char *&s) {
+ assert(internal::is_name_start(*s));
+ const Char *start = s;
+ Char c;
+ do {
+ c = *++s;
+ } while (internal::is_name_start(c) || ('0' <= c && c <= '9'));
+ const char *error = 0;
+ internal::Arg arg = get_arg(BasicStringRef<Char>(start, s - start), error);
+ if (error)
+ FMT_THROW(FormatError(error));
+ return arg;
+}
+
+template <typename Char, typename ArgFormatter>
+const Char *BasicFormatter<Char, ArgFormatter>::format(
+ const Char *&format_str, const internal::Arg &arg) {
+ using internal::Arg;
+ const Char *s = format_str;
+ FormatSpec spec;
+ if (*s == ':') {
+ if (arg.type == Arg::CUSTOM) {
+ arg.custom.format(this, arg.custom.value, &s);
+ return s;
+ }
+ ++s;
+ // Parse fill and alignment.
+ if (Char c = *s) {
+ const Char *p = s + 1;
+ spec.align_ = ALIGN_DEFAULT;
+ do {
+ switch (*p) {
+ case '<':
+ spec.align_ = ALIGN_LEFT;
+ break;
+ case '>':
+ spec.align_ = ALIGN_RIGHT;
+ break;
+ case '=':
+ spec.align_ = ALIGN_NUMERIC;
+ break;
+ case '^':
+ spec.align_ = ALIGN_CENTER;
+ break;
+ }
+ if (spec.align_ != ALIGN_DEFAULT) {
+ if (p != s) {
+ if (c == '}') break;
+ if (c == '{')
+ FMT_THROW(FormatError("invalid fill character '{'"));
+ s += 2;
+ spec.fill_ = c;
+ } else ++s;
+ if (spec.align_ == ALIGN_NUMERIC)
+ require_numeric_argument(arg, '=');
+ break;
+ }
+ } while (--p >= s);
+ }
+
+ // Parse sign.
+ switch (*s) {
+ case '+':
+ check_sign(s, arg);
+ spec.flags_ |= SIGN_FLAG | PLUS_FLAG;
+ break;
+ case '-':
+ check_sign(s, arg);
+ spec.flags_ |= MINUS_FLAG;
+ break;
+ case ' ':
+ check_sign(s, arg);
+ spec.flags_ |= SIGN_FLAG;
+ break;
+ }
+
+ if (*s == '#') {
+ require_numeric_argument(arg, '#');
+ spec.flags_ |= HASH_FLAG;
+ ++s;
+ }
+
+ // Parse zero flag.
+ if (*s == '0') {
+ require_numeric_argument(arg, '0');
+ spec.align_ = ALIGN_NUMERIC;
+ spec.fill_ = '0';
+ ++s;
+ }
+
+ // Parse width.
+ if ('0' <= *s && *s <= '9') {
+ spec.width_ = internal::parse_nonnegative_int(s);
+ } else if (*s == '{') {
+ ++s;
+ Arg width_arg = internal::is_name_start(*s) ?
+ parse_arg_name(s) : parse_arg_index(s);
+ if (*s++ != '}')
+ FMT_THROW(FormatError("invalid format string"));
+ ULongLong value = 0;
+ switch (width_arg.type) {
+ case Arg::INT:
+ if (width_arg.int_value < 0)
+ FMT_THROW(FormatError("negative width"));
+ value = width_arg.int_value;
+ break;
+ case Arg::UINT:
+ value = width_arg.uint_value;
+ break;
+ case Arg::LONG_LONG:
+ if (width_arg.long_long_value < 0)
+ FMT_THROW(FormatError("negative width"));
+ value = width_arg.long_long_value;
+ break;
+ case Arg::ULONG_LONG:
+ value = width_arg.ulong_long_value;
+ break;
+ default:
+ FMT_THROW(FormatError("width is not integer"));
+ }
+ if (value > (std::numeric_limits<int>::max)())
+ FMT_THROW(FormatError("number is too big"));
+ spec.width_ = static_cast<int>(value);
+ }
+
+ // Parse precision.
+ if (*s == '.') {
+ ++s;
+ spec.precision_ = 0;
+ if ('0' <= *s && *s <= '9') {
+ spec.precision_ = internal::parse_nonnegative_int(s);
+ } else if (*s == '{') {
+ ++s;
+ Arg precision_arg = internal::is_name_start(*s) ?
+ parse_arg_name(s) : parse_arg_index(s);
+ if (*s++ != '}')
+ FMT_THROW(FormatError("invalid format string"));
+ ULongLong value = 0;
+ switch (precision_arg.type) {
+ case Arg::INT:
+ if (precision_arg.int_value < 0)
+ FMT_THROW(FormatError("negative precision"));
+ value = precision_arg.int_value;
+ break;
+ case Arg::UINT:
+ value = precision_arg.uint_value;
+ break;
+ case Arg::LONG_LONG:
+ if (precision_arg.long_long_value < 0)
+ FMT_THROW(FormatError("negative precision"));
+ value = precision_arg.long_long_value;
+ break;
+ case Arg::ULONG_LONG:
+ value = precision_arg.ulong_long_value;
+ break;
+ default:
+ FMT_THROW(FormatError("precision is not integer"));
+ }
+ if (value > (std::numeric_limits<int>::max)())
+ FMT_THROW(FormatError("number is too big"));
+ spec.precision_ = static_cast<int>(value);
+ } else {
+ FMT_THROW(FormatError("missing precision specifier"));
+ }
+ if (arg.type <= Arg::LAST_INTEGER_TYPE || arg.type == Arg::POINTER) {
+ FMT_THROW(FormatError(
+ fmt::format("precision not allowed in {} format specifier",
+ arg.type == Arg::POINTER ? "pointer" : "integer")));
+ }
+ }
+
+ // Parse type.
+ if (*s != '}' && *s)
+ spec.type_ = static_cast<char>(*s++);
+ }
+
+ if (*s++ != '}')
+ FMT_THROW(FormatError("missing '}' in format string"));
+
+ // Format argument.
+ ArgFormatter(*this, spec, s - 1).visit(arg);
+ return s;
+}
+
+template <typename Char, typename AF>
+void BasicFormatter<Char, AF>::format(BasicCStringRef<Char> format_str) {
+ const Char *s = format_str.c_str();
+ const Char *start = s;
+ while (*s) {
+ Char c = *s++;
+ if (c != '{' && c != '}') continue;
+ if (*s == c) {
+ write(writer_, start, s);
+ start = ++s;
+ continue;
+ }
+ if (c == '}')
+ FMT_THROW(FormatError("unmatched '}' in format string"));
+ write(writer_, start, s - 1);
+ internal::Arg arg = internal::is_name_start(*s) ?
+ parse_arg_name(s) : parse_arg_index(s);
+ start = s = format(s, arg);
+ }
+ write(writer_, start, s);
+}
+} // namespace fmt
+
+#if FMT_USE_USER_DEFINED_LITERALS
+namespace fmt {
+namespace internal {
+
+template <typename Char>
+struct UdlFormat {
+ const Char *str;
+
+ template <typename... Args>
+ auto operator()(Args && ... args) const
+ -> decltype(format(str, std::forward<Args>(args)...)) {
+ return format(str, std::forward<Args>(args)...);
+ }
+};
+
+template <typename Char>
+struct UdlArg {
+ const Char *str;
+
+ template <typename T>
+ NamedArg<Char> operator=(T &&value) const {
+ return {str, std::forward<T>(value)};
+ }
+};
+
+} // namespace internal
+
+inline namespace literals {
+
+/**
+ \rst
+ C++11 literal equivalent of :func:`fmt::format`.
+
+ **Example**::
+
+ using namespace fmt::literals;
+ std::string message = "The answer is {}"_format(42);
+ \endrst
+ */
+inline internal::UdlFormat<char>
+operator"" _format(const char *s, std::size_t) { return {s}; }
+inline internal::UdlFormat<wchar_t>
+operator"" _format(const wchar_t *s, std::size_t) { return {s}; }
+
+/**
+ \rst
+ C++11 literal equivalent of :func:`fmt::arg`.
+
+ **Example**::
+
+ using namespace fmt::literals;
+ print("Elapsed time: {s:.2f} seconds", "s"_a=1.23);
+ \endrst
+ */
+inline internal::UdlArg<char>
+operator"" _a(const char *s, std::size_t) { return {s}; }
+inline internal::UdlArg<wchar_t>
+operator"" _a(const wchar_t *s, std::size_t) { return {s}; }
+
+} // inline namespace literals
+} // namespace fmt
+#endif // FMT_USE_USER_DEFINED_LITERALS
+
+// Restore warnings.
+#if FMT_GCC_VERSION >= 406
+# pragma GCC diagnostic pop
+#endif
+
+#if defined(__clang__) && !defined(FMT_ICC_VERSION)
+# pragma clang diagnostic pop
+#endif
+
+#ifdef FMT_HEADER_ONLY
+# define FMT_FUNC inline
+# include "format.cc"
+#else
+# define FMT_FUNC
+#endif
+
+namespace fmt {
+namespace internal {
+
+// Checks if a value fits in int - used to avoid warnings about comparing
+// signed and unsigned integers.
+template <bool IsSigned>
+struct IntChecker {
+ template <typename T>
+ static bool fits_in_int(T value) {
+ unsigned max = std::numeric_limits<int>::max();
+ return value <= max;
+ }
+ static bool fits_in_int(bool) { return true; }
+};
+
+template <>
+struct IntChecker<true> {
+ template <typename T>
+ static bool fits_in_int(T value) {
+ return value >= std::numeric_limits<int>::min() &&
+ value <= std::numeric_limits<int>::max();
+ }
+ static bool fits_in_int(int) { return true; }
+};
+
+class PrecisionHandler : public ArgVisitor<PrecisionHandler, int> {
+ public:
+ void report_unhandled_arg() {
+ FMT_THROW(FormatError("precision is not integer"));
+ }
+
+ template <typename T>
+ int visit_any_int(T value) {
+ if (!IntChecker<std::numeric_limits<T>::is_signed>::fits_in_int(value))
+ FMT_THROW(FormatError("number is too big"));
+ return static_cast<int>(value);
+ }
+};
+
+// IsZeroInt::visit(arg) returns true iff arg is a zero integer.
+class IsZeroInt : public ArgVisitor<IsZeroInt, bool> {
+ public:
+ template <typename T>
+ bool visit_any_int(T value) { return value == 0; }
+};
+
+template <typename T, typename U>
+struct is_same {
+ enum { value = 0 };
+};
+
+template <typename T>
+struct is_same<T, T> {
+ enum { value = 1 };
+};
+
+// An argument visitor that converts an integer argument to T for printf,
+// if T is an integral type. If T is void, the argument is converted to
+// corresponding signed or unsigned type depending on the type specifier:
+// 'd' and 'i' - signed, other - unsigned)
+template <typename T = void>
+class ArgConverter : public ArgVisitor<ArgConverter<T>, void> {
+ private:
+ internal::Arg &arg_;
+ wchar_t type_;
+
+ FMT_DISALLOW_COPY_AND_ASSIGN(ArgConverter);
+
+ public:
+ ArgConverter(internal::Arg &arg, wchar_t type)
+ : arg_(arg), type_(type) {}
+
+ void visit_bool(bool value) {
+ if (type_ != 's')
+ visit_any_int(value);
+ }
+
+ template <typename U>
+ void visit_any_int(U value) {
+ bool is_signed = type_ == 'd' || type_ == 'i';
+ using internal::Arg;
+ typedef typename internal::Conditional<
+ is_same<T, void>::value, U, T>::type TargetType;
+ if (sizeof(TargetType) <= sizeof(int)) {
+ // Extra casts are used to silence warnings.
+ if (is_signed) {
+ arg_.type = Arg::INT;
+ arg_.int_value = static_cast<int>(static_cast<TargetType>(value));
+ } else {
+ arg_.type = Arg::UINT;
+ typedef typename internal::MakeUnsigned<TargetType>::Type Unsigned;
+ arg_.uint_value = static_cast<unsigned>(static_cast<Unsigned>(value));
+ }
+ } else {
+ if (is_signed) {
+ arg_.type = Arg::LONG_LONG;
+ // glibc's printf doesn't sign extend arguments of smaller types:
+ // std::printf("%lld", -42); // prints "4294967254"
+ // but we don't have to do the same because it's a UB.
+ arg_.long_long_value = static_cast<LongLong>(value);
+ } else {
+ arg_.type = Arg::ULONG_LONG;
+ arg_.ulong_long_value =
+ static_cast<typename internal::MakeUnsigned<U>::Type>(value);
+ }
+ }
+ }
+};
+
+// Converts an integer argument to char for printf.
+class CharConverter : public ArgVisitor<CharConverter, void> {
+ private:
+ internal::Arg &arg_;
+
+ FMT_DISALLOW_COPY_AND_ASSIGN(CharConverter);
+
+ public:
+ explicit CharConverter(internal::Arg &arg) : arg_(arg) {}
+
+ template <typename T>
+ void visit_any_int(T value) {
+ arg_.type = internal::Arg::CHAR;
+ arg_.int_value = static_cast<char>(value);
+ }
+};
+
+// Checks if an argument is a valid printf width specifier and sets
+// left alignment if it is negative.
+class WidthHandler : public ArgVisitor<WidthHandler, unsigned> {
+ private:
+ FormatSpec &spec_;
+
+ FMT_DISALLOW_COPY_AND_ASSIGN(WidthHandler);
+
+ public:
+ explicit WidthHandler(FormatSpec &spec) : spec_(spec) {}
+
+ void report_unhandled_arg() {
+ FMT_THROW(FormatError("width is not integer"));
+ }
+
+ template <typename T>
+ unsigned visit_any_int(T value) {
+ typedef typename internal::IntTraits<T>::MainType UnsignedType;
+ UnsignedType width = static_cast<UnsignedType>(value);
+ if (internal::is_negative(value)) {
+ spec_.align_ = ALIGN_LEFT;
+ width = 0 - width;
+ }
+ unsigned int_max = std::numeric_limits<int>::max();
+ if (width > int_max)
+ FMT_THROW(FormatError("number is too big"));
+ return static_cast<unsigned>(width);
+ }
+};
+} // namespace internal
+
+/**
+ \rst
+ A ``printf`` argument formatter based on the `curiously recurring template
+ pattern <http://en.wikipedia.org/wiki/Curiously_recurring_template_pattern>`_.
+
+ To use `~fmt::BasicPrintfArgFormatter` define a subclass that implements some
+ or all of the visit methods with the same signatures as the methods in
+ `~fmt::ArgVisitor`, for example, `~fmt::ArgVisitor::visit_int()`.
+ Pass the subclass as the *Impl* template parameter. When a formatting
+ function processes an argument, it will dispatch to a visit method
+ specific to the argument type. For example, if the argument type is
+ ``double`` then the `~fmt::ArgVisitor::visit_double()` method of a subclass
+ will be called. If the subclass doesn't contain a method with this signature,
+ then a corresponding method of `~fmt::BasicPrintfArgFormatter` or its
+ superclass will be called.
+ \endrst
+ */
+template <typename Impl, typename Char>
+class BasicPrintfArgFormatter : public internal::ArgFormatterBase<Impl, Char> {
+ private:
+ void write_null_pointer() {
+ this->spec().type_ = 0;
+ this->write("(nil)");
+ }
+
+ typedef internal::ArgFormatterBase<Impl, Char> Base;
+
+ public:
+ /**
+ \rst
+ Constructs an argument formatter object.
+ *writer* is a reference to the output writer and *spec* contains format
+ specifier information for standard argument types.
+ \endrst
+ */
+ BasicPrintfArgFormatter(BasicWriter<Char> &writer, FormatSpec &spec)
+ : internal::ArgFormatterBase<Impl, Char>(writer, spec) {}
+
+ /** Formats an argument of type ``bool``. */
+ void visit_bool(bool value) {
+ FormatSpec &fmt_spec = this->spec();
+ if (fmt_spec.type_ != 's')
+ return this->visit_any_int(value);
+ fmt_spec.type_ = 0;
+ this->write(value);
+ }
+
+ /** Formats a character. */
+ void visit_char(int value) {
+ const FormatSpec &fmt_spec = this->spec();
+ BasicWriter<Char> &w = this->writer();
+ if (fmt_spec.type_ && fmt_spec.type_ != 'c')
+ w.write_int(value, fmt_spec);
+ typedef typename BasicWriter<Char>::CharPtr CharPtr;
+ CharPtr out = CharPtr();
+ if (fmt_spec.width_ > 1) {
+ Char fill = ' ';
+ out = w.grow_buffer(fmt_spec.width_);
+ if (fmt_spec.align_ != ALIGN_LEFT) {
+ std::fill_n(out, fmt_spec.width_ - 1, fill);
+ out += fmt_spec.width_ - 1;
+ } else {
+ std::fill_n(out + 1, fmt_spec.width_ - 1, fill);
+ }
+ } else {
+ out = w.grow_buffer(1);
+ }
+ *out = static_cast<Char>(value);
+ }
+
+ /** Formats a null-terminated C string. */
+ void visit_cstring(const char *value) {
+ if (value)
+ Base::visit_cstring(value);
+ else if (this->spec().type_ == 'p')
+ write_null_pointer();
+ else
+ this->write("(null)");
+ }
+
+ /** Formats a pointer. */
+ void visit_pointer(const void *value) {
+ if (value)
+ return Base::visit_pointer(value);
+ this->spec().type_ = 0;
+ write_null_pointer();
+ }
+
+ /** Formats an argument of a custom (user-defined) type. */
+ void visit_custom(internal::Arg::CustomValue c) {
+ BasicFormatter<Char> formatter(ArgList(), this->writer());
+ const Char format_str[] = {'}', 0};
+ const Char *format = format_str;
+ c.format(&formatter, c.value, &format);
+ }
+};
+
+/** The default printf argument formatter. */
+template <typename Char>
+class PrintfArgFormatter
+ : public BasicPrintfArgFormatter<PrintfArgFormatter<Char>, Char> {
+ public:
+ /** Constructs an argument formatter object. */
+ PrintfArgFormatter(BasicWriter<Char> &w, FormatSpec &s)
+ : BasicPrintfArgFormatter<PrintfArgFormatter<Char>, Char>(w, s) {}
+};
+
+/** This template formats data and writes the output to a writer. */
+template <typename Char, typename ArgFormatter = PrintfArgFormatter<Char> >
+class PrintfFormatter : private internal::FormatterBase {
+ private:
+ BasicWriter<Char> &writer_;
+
+ void parse_flags(FormatSpec &spec, const Char *&s);
+
+ // Returns the argument with specified index or, if arg_index is equal
+ // to the maximum unsigned value, the next argument.
+ internal::Arg get_arg(
+ const Char *s,
+ unsigned arg_index = (std::numeric_limits<unsigned>::max)());
+
+ // Parses argument index, flags and width and returns the argument index.
+ unsigned parse_header(const Char *&s, FormatSpec &spec);
+
+ public:
+ /**
+ \rst
+ Constructs a ``PrintfFormatter`` object. References to the arguments and
+ the writer are stored in the formatter object so make sure they have
+ appropriate lifetimes.
+ \endrst
+ */
+ explicit PrintfFormatter(const ArgList &args, BasicWriter<Char> &w)
+ : FormatterBase(args), writer_(w) {}
+
+ /** Formats stored arguments and writes the output to the writer. */
+ FMT_API void format(BasicCStringRef<Char> format_str);
+};
+
+template <typename Char, typename AF>
+void PrintfFormatter<Char, AF>::parse_flags(FormatSpec &spec, const Char *&s) {
+ for (;;) {
+ switch (*s++) {
+ case '-':
+ spec.align_ = ALIGN_LEFT;
+ break;
+ case '+':
+ spec.flags_ |= SIGN_FLAG | PLUS_FLAG;
+ break;
+ case '0':
+ spec.fill_ = '0';
+ break;
+ case ' ':
+ spec.flags_ |= SIGN_FLAG;
+ break;
+ case '#':
+ spec.flags_ |= HASH_FLAG;
+ break;
+ default:
+ --s;
+ return;
+ }
+ }
+}
+
+template <typename Char, typename AF>
+internal::Arg PrintfFormatter<Char, AF>::get_arg(const Char *s,
+ unsigned arg_index) {
+ (void)s;
+ const char *error = 0;
+ internal::Arg arg = arg_index == std::numeric_limits<unsigned>::max() ?
+ next_arg(error) : FormatterBase::get_arg(arg_index - 1, error);
+ if (error)
+ FMT_THROW(FormatError(!*s ? "invalid format string" : error));
+ return arg;
+}
+
+template <typename Char, typename AF>
+unsigned PrintfFormatter<Char, AF>::parse_header(
+ const Char *&s, FormatSpec &spec) {
+ unsigned arg_index = std::numeric_limits<unsigned>::max();
+ Char c = *s;
+ if (c >= '0' && c <= '9') {
+ // Parse an argument index (if followed by '$') or a width possibly
+ // preceded with '0' flag(s).
+ unsigned value = internal::parse_nonnegative_int(s);
+ if (*s == '$') { // value is an argument index
+ ++s;
+ arg_index = value;
+ } else {
+ if (c == '0')
+ spec.fill_ = '0';
+ if (value != 0) {
+ // Nonzero value means that we parsed width and don't need to
+ // parse it or flags again, so return now.
+ spec.width_ = value;
+ return arg_index;
+ }
+ }
+ }
+ parse_flags(spec, s);
+ // Parse width.
+ if (*s >= '0' && *s <= '9') {
+ spec.width_ = internal::parse_nonnegative_int(s);
+ } else if (*s == '*') {
+ ++s;
+ spec.width_ = internal::WidthHandler(spec).visit(get_arg(s));
+ }
+ return arg_index;
+}
+
+template <typename Char, typename AF>
+void PrintfFormatter<Char, AF>::format(BasicCStringRef<Char> format_str) {
+ const Char *start = format_str.c_str();
+ const Char *s = start;
+ while (*s) {
+ Char c = *s++;
+ if (c != '%') continue;
+ if (*s == c) {
+ write(writer_, start, s);
+ start = ++s;
+ continue;
+ }
+ write(writer_, start, s - 1);
+
+ FormatSpec spec;
+ spec.align_ = ALIGN_RIGHT;
+
+ // Parse argument index, flags and width.
+ unsigned arg_index = parse_header(s, spec);
+
+ // Parse precision.
+ if (*s == '.') {
+ ++s;
+ if ('0' <= *s && *s <= '9') {
+ spec.precision_ = static_cast<int>(internal::parse_nonnegative_int(s));
+ } else if (*s == '*') {
+ ++s;
+ spec.precision_ = internal::PrecisionHandler().visit(get_arg(s));
+ }
+ }
+
+ using internal::Arg;
+ Arg arg = get_arg(s, arg_index);
+ if (spec.flag(HASH_FLAG) && internal::IsZeroInt().visit(arg))
+ spec.flags_ &= ~internal::to_unsigned<int>(HASH_FLAG);
+ if (spec.fill_ == '0') {
+ if (arg.type <= Arg::LAST_NUMERIC_TYPE)
+ spec.align_ = ALIGN_NUMERIC;
+ else
+ spec.fill_ = ' '; // Ignore '0' flag for non-numeric types.
+ }
+
+ // Parse length and convert the argument to the required type.
+ using internal::ArgConverter;
+ switch (*s++) {
+ case 'h':
+ if (*s == 'h')
+ ArgConverter<signed char>(arg, *++s).visit(arg);
+ else
+ ArgConverter<short>(arg, *s).visit(arg);
+ break;
+ case 'l':
+ if (*s == 'l')
+ ArgConverter<fmt::LongLong>(arg, *++s).visit(arg);
+ else
+ ArgConverter<long>(arg, *s).visit(arg);
+ break;
+ case 'j':
+ ArgConverter<intmax_t>(arg, *s).visit(arg);
+ break;
+ case 'z':
+ ArgConverter<std::size_t>(arg, *s).visit(arg);
+ break;
+ case 't':
+ ArgConverter<std::ptrdiff_t>(arg, *s).visit(arg);
+ break;
+ case 'L':
+ // printf produces garbage when 'L' is omitted for long double, no
+ // need to do the same.
+ break;
+ default:
+ --s;
+ ArgConverter<void>(arg, *s).visit(arg);
+ }
+
+ // Parse type.
+ if (!*s)
+ FMT_THROW(FormatError("invalid format string"));
+ spec.type_ = static_cast<char>(*s++);
+ if (arg.type <= Arg::LAST_INTEGER_TYPE) {
+ // Normalize type.
+ switch (spec.type_) {
+ case 'i': case 'u':
+ spec.type_ = 'd';
+ break;
+ case 'c':
+ // TODO: handle wchar_t
+ internal::CharConverter(arg).visit(arg);
+ break;
+ }
+ }
+
+ start = s;
+
+ // Format argument.
+ AF(writer_, spec).visit(arg);
+ }
+ write(writer_, start, s);
+}
+
+template <typename Char>
+void printf(BasicWriter<Char> &w, BasicCStringRef<Char> format, ArgList args) {
+ PrintfFormatter<Char>(args, w).format(format);
+}
+
+/**
+ \rst
+ Formats arguments and returns the result as a string.
+
+ **Example**::
+
+ std::string message = fmt::sprintf("The answer is %d", 42);
+ \endrst
+*/
+inline std::string sprintf(CStringRef format, ArgList args) {
+ MemoryWriter w;
+ printf(w, format, args);
+ return w.str();
+}
+FMT_VARIADIC(std::string, sprintf, CStringRef)
+
+inline std::wstring sprintf(WCStringRef format, ArgList args) {
+ WMemoryWriter w;
+ printf(w, format, args);
+ return w.str();
+}
+FMT_VARIADIC_W(std::wstring, sprintf, WCStringRef)
+
+/**
+ \rst
+ Prints formatted data to the file *f*.
+
+ **Example**::
+
+ fmt::fprintf(stderr, "Don't %s!", "panic");
+ \endrst
+ */
+FMT_API int fprintf(std::FILE *f, CStringRef format, ArgList args);
+FMT_VARIADIC(int, fprintf, std::FILE *, CStringRef)
+
+/**
+ \rst
+ Prints formatted data to ``stdout``.
+
+ **Example**::
+
+ fmt::printf("Elapsed time: %.2f seconds", 1.23);
+ \endrst
+ */
+inline int printf(CStringRef format, ArgList args) {
+ return fprintf(stdout, format, args);
+}
+FMT_VARIADIC(int, printf, CStringRef)
+} // namespace fmt
diff --git a/rb/Makefile.am b/rb/Makefile.am
index 10eb093e9..9023c033c 100644
--- a/rb/Makefile.am
+++ b/rb/Makefile.am
@@ -64,5 +64,6 @@ librb_la_SOURCES = \
radixtree.c \
arc4random.c \
version.c \
- terminate.cc \
+ terminate.cc \
+ format.cc \
rb.cc
diff --git a/rb/format.cc b/rb/format.cc
new file mode 100644
index 000000000..d918c1112
--- /dev/null
+++ b/rb/format.cc
@@ -0,0 +1,555 @@
+/*
+ Formatting library for C++
+
+ Copyright (c) 2012 - 2016, Victor Zverovich
+ All rights reserved.
+
+ Redistribution and use in source and binary forms, with or without
+ modification, are permitted provided that the following conditions are met:
+
+ 1. Redistributions of source code must retain the above copyright notice, this
+ list of conditions and the following disclaimer.
+ 2. Redistributions in binary form must reproduce the above copyright notice,
+ this list of conditions and the following disclaimer in the documentation
+ and/or other materials provided with the distribution.
+
+ THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
+ ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
+ ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+ ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <rb/format.h>
+
+#include <string.h>
+
+#include <cctype>
+#include <cerrno>
+#include <climits>
+#include <cmath>
+#include <cstdarg>
+#include <cstddef> // for std::ptrdiff_t
+
+#if defined(_WIN32) && defined(__MINGW32__)
+# include <cstring>
+#endif
+
+#if FMT_USE_WINDOWS_H
+# if defined(NOMINMAX) || defined(FMT_WIN_MINMAX)
+# include <windows.h>
+# else
+# define NOMINMAX
+# include <windows.h>
+# undef NOMINMAX
+# endif
+#endif
+
+using fmt::internal::Arg;
+
+#if FMT_EXCEPTIONS
+# define FMT_TRY try
+# define FMT_CATCH(x) catch (x)
+#else
+# define FMT_TRY if (true)
+# define FMT_CATCH(x) if (false)
+#endif
+
+#ifdef _MSC_VER
+# pragma warning(push)
+# pragma warning(disable: 4127) // conditional expression is constant
+# pragma warning(disable: 4702) // unreachable code
+// Disable deprecation warning for strerror. The latter is not called but
+// MSVC fails to detect it.
+# pragma warning(disable: 4996)
+#endif
+
+// Dummy implementations of strerror_r and strerror_s called if corresponding
+// system functions are not available.
+static inline fmt::internal::Null<> strerror_r(int, char *, ...) {
+ return fmt::internal::Null<>();
+}
+static inline fmt::internal::Null<> strerror_s(char *, std::size_t, ...) {
+ return fmt::internal::Null<>();
+}
+
+namespace fmt {
+
+FMT_FUNC internal::RuntimeError::~RuntimeError() throw() {}
+FMT_FUNC FormatError::~FormatError() throw() {}
+FMT_FUNC SystemError::~SystemError() throw() {}
+
+namespace {
+
+#ifndef _MSC_VER
+# define FMT_SNPRINTF snprintf
+#else // _MSC_VER
+inline int fmt_snprintf(char *buffer, size_t size, const char *format, ...) {
+ va_list args;
+ va_start(args, format);
+ int result = vsnprintf_s(buffer, size, _TRUNCATE, format, args);
+ va_end(args);
+ return result;
+}
+# define FMT_SNPRINTF fmt_snprintf
+#endif // _MSC_VER
+
+#if defined(_WIN32) && defined(__MINGW32__) && !defined(__NO_ISOCEXT)
+# define FMT_SWPRINTF snwprintf
+#else
+# define FMT_SWPRINTF swprintf
+#endif // defined(_WIN32) && defined(__MINGW32__) && !defined(__NO_ISOCEXT)
+
+const char RESET_COLOR[] = "\x1b[0m";
+
+typedef void (*FormatFunc)(Writer &, int, StringRef);
+
+// Portable thread-safe version of strerror.
+// Sets buffer to point to a string describing the error code.
+// This can be either a pointer to a string stored in buffer,
+// or a pointer to some static immutable string.
+// Returns one of the following values:
+// 0 - success
+// ERANGE - buffer is not large enough to store the error message
+// other - failure
+// Buffer should be at least of size 1.
+int safe_strerror(
+ int error_code, char *&buffer, std::size_t buffer_size) FMT_NOEXCEPT {
+ FMT_ASSERT(buffer != 0 && buffer_size != 0, "invalid buffer");
+
+ class StrError {
+ private:
+ int error_code_;
+ char *&buffer_;
+ std::size_t buffer_size_;
+
+ // A noop assignment operator to avoid bogus warnings.
+ void operator=(const StrError &) {}
+
+ // Handle the result of XSI-compliant version of strerror_r.
+ int handle(int result) {
+ // glibc versions before 2.13 return result in errno.
+ return result == -1 ? errno : result;
+ }
+
+ // Handle the result of GNU-specific version of strerror_r.
+ int handle(char *message) {
+ // If the buffer is full then the message is probably truncated.
+ if (message == buffer_ && strlen(buffer_) == buffer_size_ - 1)
+ return ERANGE;
+ buffer_ = message;
+ return 0;
+ }
+
+ // Handle the case when strerror_r is not available.
+ int handle(internal::Null<>) {
+ return fallback(strerror_s(buffer_, buffer_size_, error_code_));
+ }
+
+ // Fallback to strerror_s when strerror_r is not available.
+ int fallback(int result) {
+ // If the buffer is full then the message is probably truncated.
+ return result == 0 && strlen(buffer_) == buffer_size_ - 1 ?
+ ERANGE : result;
+ }
+
+ // Fallback to strerror if strerror_r and strerror_s are not available.
+ int fallback(internal::Null<>) {
+ errno = 0;
+ buffer_ = strerror(error_code_);
+ return errno;
+ }
+
+ public:
+ StrError(int err_code, char *&buf, std::size_t buf_size)
+ : error_code_(err_code), buffer_(buf), buffer_size_(buf_size) {}
+
+ int run() {
+ strerror_r(0, 0, ""); // Suppress a warning about unused strerror_r.
+ return handle(strerror_r(error_code_, buffer_, buffer_size_));
+ }
+ };
+ return StrError(error_code, buffer, buffer_size).run();
+}
+
+void format_error_code(Writer &out, int error_code,
+ StringRef message) FMT_NOEXCEPT {
+ // Report error code making sure that the output fits into
+ // INLINE_BUFFER_SIZE to avoid dynamic memory allocation and potential
+ // bad_alloc.
+ out.clear();
+ static const char SEP[] = ": ";
+ static const char ERROR_STR[] = "error ";
+ // Subtract 2 to account for terminating null characters in SEP and ERROR_STR.
+ std::size_t error_code_size = sizeof(SEP) + sizeof(ERROR_STR) - 2;
+ typedef internal::IntTraits<int>::MainType MainType;
+ MainType abs_value = static_cast<MainType>(error_code);
+ if (internal::is_negative(error_code)) {
+ abs_value = 0 - abs_value;
+ ++error_code_size;
+ }
+ error_code_size += internal::count_digits(abs_value);
+ if (message.size() <= internal::INLINE_BUFFER_SIZE - error_code_size)
+ out << message << SEP;
+ out << ERROR_STR << error_code;
+ assert(out.size() <= internal::INLINE_BUFFER_SIZE);
+}
+
+void report_error(FormatFunc func, int error_code,
+ StringRef message) FMT_NOEXCEPT {
+ MemoryWriter full_message;
+ func(full_message, error_code, message);
+ // Use Writer::data instead of Writer::c_str to avoid potential memory
+ // allocation.
+ std::fwrite(full_message.data(), full_message.size(), 1, stderr);
+ std::fputc('\n', stderr);
+}
+} // namespace
+
+namespace internal {
+
+// This method is used to preserve binary compatibility with fmt 3.0.
+// It can be removed in 4.0.
+FMT_FUNC void format_system_error(
+ Writer &out, int error_code, StringRef message) FMT_NOEXCEPT {
+ fmt::format_system_error(out, error_code, message);
+}
+} // namespace internal
+
+FMT_FUNC void SystemError::init(
+ int err_code, CStringRef format_str, ArgList args) {
+ error_code_ = err_code;
+ MemoryWriter w;
+ format_system_error(w, err_code, format(format_str, args));
+ std::runtime_error &base = *this;
+ base = std::runtime_error(w.str());
+}
+
+template <typename T>
+int internal::CharTraits<char>::format_float(
+ char *buffer, std::size_t size, const char *format,
+ unsigned width, int precision, T value) {
+ if (width == 0) {
+ return precision < 0 ?
+ FMT_SNPRINTF(buffer, size, format, value) :
+ FMT_SNPRINTF(buffer, size, format, precision, value);
+ }
+ return precision < 0 ?
+ FMT_SNPRINTF(buffer, size, format, width, value) :
+ FMT_SNPRINTF(buffer, size, format, width, precision, value);
+}
+
+template <typename T>
+int internal::CharTraits<wchar_t>::format_float(
+ wchar_t *buffer, std::size_t size, const wchar_t *format,
+ unsigned width, int precision, T value) {
+ if (width == 0) {
+ return precision < 0 ?
+ FMT_SWPRINTF(buffer, size, format, value) :
+ FMT_SWPRINTF(buffer, size, format, precision, value);
+ }
+ return precision < 0 ?
+ FMT_SWPRINTF(buffer, size, format, width, value) :
+ FMT_SWPRINTF(buffer, size, format, width, precision, value);
+}
+
+template <typename T>
+const char internal::BasicData<T>::DIGITS[] =
+ "0001020304050607080910111213141516171819"
+ "2021222324252627282930313233343536373839"
+ "4041424344454647484950515253545556575859"
+ "6061626364656667686970717273747576777879"
+ "8081828384858687888990919293949596979899";
+
+#define FMT_POWERS_OF_10(factor) \
+ factor * 10, \
+ factor * 100, \
+ factor * 1000, \
+ factor * 10000, \
+ factor * 100000, \
+ factor * 1000000, \
+ factor * 10000000, \
+ factor * 100000000, \
+ factor * 1000000000
+
+template <typename T>
+const uint32_t internal::BasicData<T>::POWERS_OF_10_32[] = {
+ 0, FMT_POWERS_OF_10(1)
+};
+
+template <typename T>
+const uint64_t internal::BasicData<T>::POWERS_OF_10_64[] = {
+ 0,
+ FMT_POWERS_OF_10(1),
+ FMT_POWERS_OF_10(ULongLong(1000000000)),
+ // Multiply several constants instead of using a single long long constant
+ // to avoid warnings about C++98 not supporting long long.
+ ULongLong(1000000000) * ULongLong(1000000000) * 10
+};
+
+FMT_FUNC void internal::report_unknown_type(char code, const char *type) {
+ (void)type;
+ if (std::isprint(static_cast<unsigned char>(code))) {
+ FMT_THROW(FormatError(
+ format("unknown format code '{}' for {}", code, type)));
+ }
+ FMT_THROW(FormatError(
+ format("unknown format code '\\x{:02x}' for {}",
+ static_cast<unsigned>(code), type)));
+}
+
+#if FMT_USE_WINDOWS_H
+
+FMT_FUNC internal::UTF8ToUTF16::UTF8ToUTF16(StringRef s) {
+ static const char ERROR_MSG[] = "cannot convert string from UTF-8 to UTF-16";
+ if (s.size() > INT_MAX)
+ FMT_THROW(WindowsError(ERROR_INVALID_PARAMETER, ERROR_MSG));
+ int s_size = static_cast<int>(s.size());
+ int length = MultiByteToWideChar(
+ CP_UTF8, MB_ERR_INVALID_CHARS, s.data(), s_size, 0, 0);
+ if (length == 0)
+ FMT_THROW(WindowsError(GetLastError(), ERROR_MSG));
+ buffer_.resize(length + 1);
+ length = MultiByteToWideChar(
+ CP_UTF8, MB_ERR_INVALID_CHARS, s.data(), s_size, &buffer_[0], length);
+ if (length == 0)
+ FMT_THROW(WindowsError(GetLastError(), ERROR_MSG));
+ buffer_[length] = 0;
+}
+
+FMT_FUNC internal::UTF16ToUTF8::UTF16ToUTF8(WStringRef s) {
+ if (int error_code = convert(s)) {
+ FMT_THROW(WindowsError(error_code,
+ "cannot convert string from UTF-16 to UTF-8"));
+ }
+}
+
+FMT_FUNC int internal::UTF16ToUTF8::convert(WStringRef s) {
+ if (s.size() > INT_MAX)
+ return ERROR_INVALID_PARAMETER;
+ int s_size = static_cast<int>(s.size());
+ int length = WideCharToMultiByte(CP_UTF8, 0, s.data(), s_size, 0, 0, 0, 0);
+ if (length == 0)
+ return GetLastError();
+ buffer_.resize(length + 1);
+ length = WideCharToMultiByte(
+ CP_UTF8, 0, s.data(), s_size, &buffer_[0], length, 0, 0);
+ if (length == 0)
+ return GetLastError();
+ buffer_[length] = 0;
+ return 0;
+}
+
+FMT_FUNC void WindowsError::init(
+ int err_code, CStringRef format_str, ArgList args) {
+ error_code_ = err_code;
+ MemoryWriter w;
+ internal::format_windows_error(w, err_code, format(format_str, args));
+ std::runtime_error &base = *this;
+ base = std::runtime_error(w.str());
+}
+
+FMT_FUNC void internal::format_windows_error(
+ Writer &out, int error_code, StringRef message) FMT_NOEXCEPT {
+ FMT_TRY {
+ MemoryBuffer<wchar_t, INLINE_BUFFER_SIZE> buffer;
+ buffer.resize(INLINE_BUFFER_SIZE);
+ for (;;) {
+ wchar_t *system_message = &buffer[0];
+ int result = FormatMessageW(FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_IGNORE_INSERTS,
+ 0, error_code, MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
+ system_message, static_cast<uint32_t>(buffer.size()), 0);
+ if (result != 0) {
+ UTF16ToUTF8 utf8_message;
+ if (utf8_message.convert(system_message) == ERROR_SUCCESS) {
+ out << message << ": " << utf8_message;
+ return;
+ }
+ break;
+ }
+ if (GetLastError() != ERROR_INSUFFICIENT_BUFFER)
+ break; // Can't get error message, report error code instead.
+ buffer.resize(buffer.size() * 2);
+ }
+ } FMT_CATCH(...) {}
+ fmt::format_error_code(out, error_code, message); // 'fmt::' is for bcc32.
+}
+
+#endif // FMT_USE_WINDOWS_H
+
+FMT_FUNC void format_system_error(
+ Writer &out, int error_code, StringRef message) FMT_NOEXCEPT {
+ FMT_TRY {
+ internal::MemoryBuffer<char, internal::INLINE_BUFFER_SIZE> buffer;
+ buffer.resize(internal::INLINE_BUFFER_SIZE);
+ for (;;) {
+ char *system_message = &buffer[0];
+ int result = safe_strerror(error_code, system_message, buffer.size());
+ if (result == 0) {
+ out << message << ": " << system_message;
+ return;
+ }
+ if (result != ERANGE)
+ break; // Can't get error message, report error code instead.
+ buffer.resize(buffer.size() * 2);
+ }
+ } FMT_CATCH(...) {}
+ fmt::format_error_code(out, error_code, message); // 'fmt::' is for bcc32.
+}
+
+template <typename Char>
+void internal::ArgMap<Char>::init(const ArgList &args) {
+ if (!map_.empty())
+ return;
+ typedef internal::NamedArg<Char> NamedArg;
+ const NamedArg *named_arg = 0;
+ bool use_values =
+ args.type(ArgList::MAX_PACKED_ARGS - 1) == internal::Arg::NONE;
+ if (use_values) {
+ for (unsigned i = 0;/*nothing*/; ++i) {
+ internal::Arg::Type arg_type = args.type(i);
+ switch (arg_type) {
+ case internal::Arg::NONE:
+ return;
+ case internal::Arg::NAMED_ARG:
+ named_arg = static_cast<const NamedArg*>(args.values_[i].pointer);
+ map_.push_back(Pair(named_arg->name, *named_arg));
+ break;
+ default:
+ /*nothing*/;
+ }
+ }
+ return;
+ }
+ for (unsigned i = 0; i != ArgList::MAX_PACKED_ARGS; ++i) {
+ internal::Arg::Type arg_type = args.type(i);
+ if (arg_type == internal::Arg::NAMED_ARG) {
+ named_arg = static_cast<const NamedArg*>(args.args_[i].pointer);
+ map_.push_back(Pair(named_arg->name, *named_arg));
+ }
+ }
+ for (unsigned i = ArgList::MAX_PACKED_ARGS;/*nothing*/; ++i) {
+ switch (args.args_[i].type) {
+ case internal::Arg::NONE:
+ return;
+ case internal::Arg::NAMED_ARG:
+ named_arg = static_cast<const NamedArg*>(args.args_[i].pointer);
+ map_.push_back(Pair(named_arg->name, *named_arg));
+ break;
+ default:
+ /*nothing*/;
+ }
+ }
+}
+
+template <typename Char>
+void internal::FixedBuffer<Char>::grow(std::size_t) {
+ FMT_THROW(std::runtime_error("buffer overflow"));
+}
+
+FMT_FUNC Arg internal::FormatterBase::do_get_arg(
+ unsigned arg_index, const char *&error) {
+ Arg arg = args_[arg_index];
+ switch (arg.type) {
+ case Arg::NONE:
+ error = "argument index out of range";
+ break;
+ case Arg::NAMED_ARG:
+ arg = *static_cast<const internal::Arg*>(arg.pointer);
+ break;
+ default:
+ /*nothing*/;
+ }
+ return arg;
+}
+
+FMT_FUNC void report_system_error(
+ int error_code, fmt::StringRef message) FMT_NOEXCEPT {
+ // 'fmt::' is for bcc32.
+ report_error(format_system_error, error_code, message);
+}
+
+#if FMT_USE_WINDOWS_H
+FMT_FUNC void report_windows_error(
+ int error_code, fmt::StringRef message) FMT_NOEXCEPT {
+ // 'fmt::' is for bcc32.
+ report_error(internal::format_windows_error, error_code, message);
+}
+#endif
+
+FMT_FUNC void print(std::FILE *f, CStringRef format_str, ArgList args) {
+ MemoryWriter w;
+ w.write(format_str, args);
+ std::fwrite(w.data(), 1, w.size(), f);
+}
+
+FMT_FUNC void print(CStringRef format_str, ArgList args) {
+ 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>
+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