3734 lines
118 KiB
C++
3734 lines
118 KiB
C++
/*
|
|
Formatting library for C++
|
|
|
|
Copyright (c) 2012 - present, 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.
|
|
*/
|
|
|
|
#ifndef FMT_FORMAT_H_
|
|
#define FMT_FORMAT_H_
|
|
|
|
#include <algorithm>
|
|
#include <cassert>
|
|
#include <cmath>
|
|
#include <cstdint>
|
|
#include <cstring>
|
|
#include <limits>
|
|
#include <memory>
|
|
#include <stdexcept>
|
|
|
|
#ifdef __clang__
|
|
# define FMT_CLANG_VERSION (__clang_major__ * 100 + __clang_minor__)
|
|
#else
|
|
# define FMT_CLANG_VERSION 0
|
|
#endif
|
|
|
|
#ifdef __INTEL_COMPILER
|
|
# define FMT_ICC_VERSION __INTEL_COMPILER
|
|
#elif defined(__ICL)
|
|
# define FMT_ICC_VERSION __ICL
|
|
#else
|
|
# define FMT_ICC_VERSION 0
|
|
#endif
|
|
|
|
#ifdef __NVCC__
|
|
# define FMT_CUDA_VERSION (__CUDACC_VER_MAJOR__ * 100 + __CUDACC_VER_MINOR__)
|
|
#else
|
|
# define FMT_CUDA_VERSION 0
|
|
#endif
|
|
|
|
#include "core.h"
|
|
|
|
#if FMT_GCC_VERSION >= 406 || FMT_CLANG_VERSION
|
|
# pragma GCC diagnostic push
|
|
|
|
// Disable warning about not handling all enums in switch statement even with
|
|
// a default case
|
|
# pragma GCC diagnostic ignored "-Wswitch-enum"
|
|
|
|
// Disable the warning about declaration shadowing because it affects too
|
|
// many valid cases.
|
|
# pragma GCC diagnostic ignored "-Wshadow"
|
|
|
|
// Disable the warning about nonliteral format strings because we construct
|
|
// them dynamically when falling back to snprintf for FP formatting.
|
|
# pragma GCC diagnostic ignored "-Wformat-nonliteral"
|
|
#endif
|
|
|
|
#if FMT_CLANG_VERSION
|
|
# pragma GCC diagnostic ignored "-Wgnu-string-literal-operator-template"
|
|
#endif
|
|
|
|
#ifdef _SECURE_SCL
|
|
# define FMT_SECURE_SCL _SECURE_SCL
|
|
#else
|
|
# define FMT_SECURE_SCL 0
|
|
#endif
|
|
|
|
// Check whether we can use unrestricted unions and use struct if not.
|
|
#ifndef FMT_UNRESTRICTED_UNION
|
|
# if FMT_MSC_VER >= 1900 || FMT_GCC_VERSION >= 406 || FMT_CLANG_VERSION >= 303
|
|
# define FMT_UNRESTRICTED_UNION union
|
|
# else
|
|
# define FMT_UNRESTRICTED_UNION struct
|
|
# endif
|
|
#endif
|
|
|
|
#if FMT_SECURE_SCL
|
|
# include <iterator>
|
|
#endif
|
|
|
|
#ifdef __has_builtin
|
|
# define FMT_HAS_BUILTIN(x) __has_builtin(x)
|
|
#else
|
|
# define FMT_HAS_BUILTIN(x) 0
|
|
#endif
|
|
|
|
#ifdef __GNUC_LIBSTD__
|
|
# define FMT_GNUC_LIBSTD_VERSION \
|
|
(__GNUC_LIBSTD__ * 100 + __GNUC_LIBSTD_MINOR__)
|
|
#endif
|
|
|
|
#ifndef FMT_THROW
|
|
# if FMT_EXCEPTIONS
|
|
# if FMT_MSC_VER
|
|
FMT_BEGIN_NAMESPACE
|
|
namespace internal {
|
|
template <typename Exception> inline void do_throw(const Exception& x) {
|
|
// Silence unreachable code warnings in MSVC because these are nearly
|
|
// impossible to fix in a generic code.
|
|
volatile bool b = true;
|
|
if (b) throw x;
|
|
}
|
|
} // namespace internal
|
|
FMT_END_NAMESPACE
|
|
# define FMT_THROW(x) fmt::internal::do_throw(x)
|
|
# else
|
|
# define FMT_THROW(x) throw x
|
|
# endif
|
|
# else
|
|
# define FMT_THROW(x) \
|
|
do { \
|
|
static_cast<void>(sizeof(x)); \
|
|
assert(false); \
|
|
} while (false);
|
|
# endif
|
|
#endif
|
|
|
|
#ifndef FMT_USE_USER_DEFINED_LITERALS
|
|
// For Intel's compiler and NVIDIA's compiler both it and the system gcc/msc
|
|
// must support UDLs.
|
|
# if (FMT_HAS_FEATURE(cxx_user_literals) || FMT_GCC_VERSION >= 407 || \
|
|
FMT_MSC_VER >= 1900) && \
|
|
(!(FMT_ICC_VERSION || FMT_CUDA_VERSION) || FMT_ICC_VERSION >= 1500 || \
|
|
FMT_CUDA_VERSION >= 700)
|
|
# define FMT_USE_USER_DEFINED_LITERALS 1
|
|
# else
|
|
# define FMT_USE_USER_DEFINED_LITERALS 0
|
|
# endif
|
|
#endif
|
|
|
|
#ifndef FMT_USE_UDL_TEMPLATE
|
|
// EDG front end based compilers (icc, nvcc) do not support UDL templates yet
|
|
// and GCC 9 warns about them.
|
|
# if FMT_USE_USER_DEFINED_LITERALS && FMT_ICC_VERSION == 0 && \
|
|
FMT_CUDA_VERSION == 0 && \
|
|
((FMT_GCC_VERSION >= 600 && FMT_GCC_VERSION <= 900 && \
|
|
__cplusplus >= 201402L) || \
|
|
(defined(FMT_CLANG_VERSION) && FMT_CLANG_VERSION >= 304))
|
|
# define FMT_USE_UDL_TEMPLATE 1
|
|
# else
|
|
# define FMT_USE_UDL_TEMPLATE 0
|
|
# endif
|
|
#endif
|
|
|
|
#ifdef FMT_USE_INT128
|
|
// Do nothing.
|
|
#elif defined(__SIZEOF_INT128__)
|
|
# define FMT_USE_INT128 1
|
|
#else
|
|
# define FMT_USE_INT128 0
|
|
#endif
|
|
|
|
// __builtin_clz is broken in clang with Microsoft CodeGen:
|
|
// https://github.com/fmtlib/fmt/issues/519
|
|
#ifndef _MSC_VER
|
|
# 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
|
|
#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) && !defined(_MANAGED)
|
|
# include <intrin.h> // _BitScanReverse, _BitScanReverse64
|
|
|
|
FMT_BEGIN_NAMESPACE
|
|
namespace internal {
|
|
// Avoid Clang with Microsoft CodeGen's -Wunknown-pragmas warning.
|
|
# ifndef __clang__
|
|
# pragma intrinsic(_BitScanReverse)
|
|
# endif
|
|
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)
|
|
|
|
# if defined(_WIN64) && !defined(__clang__)
|
|
# 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)
|
|
} // namespace internal
|
|
FMT_END_NAMESPACE
|
|
#endif
|
|
|
|
FMT_BEGIN_NAMESPACE
|
|
namespace internal {
|
|
|
|
#ifndef FMT_USE_GRISU
|
|
# define FMT_USE_GRISU 1
|
|
#endif
|
|
|
|
// A fallback implementation of uintptr_t for systems that lack it.
|
|
namespace uintptr {
|
|
struct uintptr_t {
|
|
unsigned char value[sizeof(void*)];
|
|
};
|
|
} // namespace uintptr
|
|
using uintptr::uintptr_t;
|
|
typedef std::numeric_limits<uintptr_t> numutil;
|
|
|
|
template <typename T> inline bool use_grisu() {
|
|
return FMT_USE_GRISU && std::numeric_limits<double>::is_iec559 &&
|
|
sizeof(T) <= sizeof(double);
|
|
}
|
|
|
|
// An equivalent of `*reinterpret_cast<Dest*>(&source)` that doesn't produce
|
|
// undefined behavior (e.g. due to type aliasing).
|
|
// Example: uint64_t d = bit_cast<uint64_t>(2.718);
|
|
template <typename Dest, typename Source>
|
|
inline Dest bit_cast(const Source& source) {
|
|
static_assert(sizeof(Dest) == sizeof(Source), "size mismatch");
|
|
Dest dest;
|
|
std::memcpy(&dest, &source, sizeof(dest));
|
|
return dest;
|
|
}
|
|
|
|
// An implementation of begin and end for pre-C++11 compilers such as gcc 4.
|
|
template <typename C>
|
|
FMT_CONSTEXPR auto begin(const C& c) -> decltype(c.begin()) {
|
|
return c.begin();
|
|
}
|
|
template <typename T, std::size_t N>
|
|
FMT_CONSTEXPR T* begin(T (&array)[N]) FMT_NOEXCEPT {
|
|
return array;
|
|
}
|
|
template <typename C> FMT_CONSTEXPR auto end(const C& c) -> decltype(c.end()) {
|
|
return c.end();
|
|
}
|
|
template <typename T, std::size_t N>
|
|
FMT_CONSTEXPR T* end(T (&array)[N]) FMT_NOEXCEPT {
|
|
return array + N;
|
|
}
|
|
|
|
// An implementation of iterator_t for pre-C++20 compilers such as gcc 4.
|
|
template <typename T> struct iterator_t {
|
|
typedef decltype(internal::begin(std::declval<const T&>())) type;
|
|
};
|
|
|
|
// For std::result_of in gcc 4.4.
|
|
template <typename Result> struct function {
|
|
template <typename T> struct result { typedef Result type; };
|
|
};
|
|
|
|
template <typename Allocator>
|
|
typename Allocator::value_type* allocate(Allocator& alloc, std::size_t n) {
|
|
#if __cplusplus >= 201103L || FMT_MSC_VER >= 1700
|
|
return std::allocator_traits<Allocator>::allocate(alloc, n);
|
|
#else
|
|
return alloc.allocate(n);
|
|
#endif
|
|
}
|
|
} // namespace internal
|
|
FMT_END_NAMESPACE
|
|
|
|
namespace std {
|
|
using namespace fmt::v5::internal::uintptr;
|
|
// Standard permits specialization of std::numeric_limits. This specialization
|
|
// is used to detect presence of uintptr_t.
|
|
template <>
|
|
class numeric_limits<fmt::internal::uintptr_t>
|
|
: public std::numeric_limits<int> {
|
|
public:
|
|
typedef uintptr_t uintptr_type;
|
|
|
|
static uintptr_type to_uint(const void* p) {
|
|
return fmt::internal::bit_cast<uintptr_type>(p);
|
|
}
|
|
};
|
|
} // namespace std
|
|
|
|
FMT_BEGIN_NAMESPACE
|
|
template <typename Range> class basic_writer;
|
|
|
|
template <typename OutputIt, typename T = typename OutputIt::value_type>
|
|
class output_range {
|
|
private:
|
|
OutputIt it_;
|
|
|
|
// Unused yet.
|
|
typedef void sentinel;
|
|
sentinel end() const;
|
|
|
|
public:
|
|
typedef OutputIt iterator;
|
|
typedef T value_type;
|
|
|
|
explicit output_range(OutputIt it) : it_(it) {}
|
|
OutputIt begin() const { return it_; }
|
|
};
|
|
|
|
// A range where begin() returns back_insert_iterator.
|
|
template <typename Container>
|
|
class back_insert_range
|
|
: public output_range<std::back_insert_iterator<Container>> {
|
|
typedef output_range<std::back_insert_iterator<Container>> base;
|
|
|
|
public:
|
|
typedef typename Container::value_type value_type;
|
|
|
|
back_insert_range(Container& c) : base(std::back_inserter(c)) {}
|
|
back_insert_range(typename base::iterator it) : base(it) {}
|
|
};
|
|
|
|
typedef basic_writer<back_insert_range<internal::buffer<char>>> writer;
|
|
typedef basic_writer<back_insert_range<internal::buffer<wchar_t>>> wwriter;
|
|
|
|
/** A formatting error such as invalid format string. */
|
|
class format_error : public std::runtime_error {
|
|
public:
|
|
explicit format_error(const char* message) : std::runtime_error(message) {}
|
|
|
|
explicit format_error(const std::string& message)
|
|
: std::runtime_error(message) {}
|
|
};
|
|
|
|
namespace internal {
|
|
|
|
#if FMT_SECURE_SCL
|
|
template <typename T> struct checked {
|
|
typedef stdext::checked_array_iterator<T*> type;
|
|
};
|
|
|
|
// Make a checked iterator to avoid warnings on MSVC.
|
|
template <typename T>
|
|
inline stdext::checked_array_iterator<T*> make_checked(T* p, std::size_t size) {
|
|
return {p, size};
|
|
}
|
|
#else
|
|
template <typename T> struct checked { typedef T* type; };
|
|
template <typename T> inline T* make_checked(T* p, std::size_t) { return p; }
|
|
#endif
|
|
|
|
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);
|
|
reserve(new_size);
|
|
std::uninitialized_copy(begin, end,
|
|
internal::make_checked(ptr_, capacity_) + size_);
|
|
size_ = new_size;
|
|
}
|
|
} // namespace internal
|
|
|
|
// C++20 feature test, since r346892 Clang considers char8_t a fundamental
|
|
// type in this mode. If this is the case __cpp_char8_t will be defined.
|
|
#if !defined(__cpp_char8_t)
|
|
// A UTF-8 code unit type.
|
|
enum char8_t : unsigned char {};
|
|
#endif
|
|
template <> struct is_char<char8_t> : std::true_type {};
|
|
|
|
// A UTF-8 string view.
|
|
class u8string_view : public basic_string_view<char8_t> {
|
|
public:
|
|
typedef char8_t char_type;
|
|
|
|
u8string_view(const char* s)
|
|
: basic_string_view<char8_t>(reinterpret_cast<const char8_t*>(s)) {}
|
|
u8string_view(const char* s, size_t count) FMT_NOEXCEPT
|
|
: basic_string_view<char8_t>(reinterpret_cast<const char8_t*>(s), count) {
|
|
}
|
|
};
|
|
|
|
#if FMT_USE_USER_DEFINED_LITERALS
|
|
inline namespace literals {
|
|
inline u8string_view operator"" _u(const char* s, std::size_t n) {
|
|
return {s, n};
|
|
}
|
|
} // namespace literals
|
|
#endif
|
|
|
|
// The number of characters to store in the basic_memory_buffer object itself
|
|
// to avoid dynamic memory allocation.
|
|
enum { inline_buffer_size = 500 };
|
|
|
|
/**
|
|
\rst
|
|
A dynamically growing memory buffer for trivially copyable/constructible types
|
|
with the first ``SIZE`` elements stored in the object itself.
|
|
|
|
You can use one of the following typedefs for common character types:
|
|
|
|
+----------------+------------------------------+
|
|
| Type | Definition |
|
|
+================+==============================+
|
|
| memory_buffer | basic_memory_buffer<char> |
|
|
+----------------+------------------------------+
|
|
| wmemory_buffer | basic_memory_buffer<wchar_t> |
|
|
+----------------+------------------------------+
|
|
|
|
**Example**::
|
|
|
|
fmt::memory_buffer out;
|
|
format_to(out, "The answer is {}.", 42);
|
|
|
|
This will append the following output to the ``out`` object:
|
|
|
|
.. code-block:: none
|
|
|
|
The answer is 42.
|
|
|
|
The output can be converted to an ``std::string`` with ``to_string(out)``.
|
|
\endrst
|
|
*/
|
|
template <typename T, std::size_t SIZE = inline_buffer_size,
|
|
typename Allocator = std::allocator<T>>
|
|
class basic_memory_buffer : private Allocator, public internal::buffer<T> {
|
|
private:
|
|
T store_[SIZE];
|
|
|
|
// Deallocate memory allocated by the buffer.
|
|
void deallocate() {
|
|
T* data = this->data();
|
|
if (data != store_) Allocator::deallocate(data, this->capacity());
|
|
}
|
|
|
|
protected:
|
|
void grow(std::size_t size) FMT_OVERRIDE;
|
|
|
|
public:
|
|
typedef T value_type;
|
|
typedef const T& const_reference;
|
|
|
|
explicit basic_memory_buffer(const Allocator& alloc = Allocator())
|
|
: Allocator(alloc) {
|
|
this->set(store_, SIZE);
|
|
}
|
|
~basic_memory_buffer() { deallocate(); }
|
|
|
|
private:
|
|
// Move data from other to this buffer.
|
|
void move(basic_memory_buffer& other) {
|
|
Allocator &this_alloc = *this, &other_alloc = other;
|
|
this_alloc = std::move(other_alloc);
|
|
T* data = other.data();
|
|
std::size_t size = other.size(), capacity = other.capacity();
|
|
if (data == other.store_) {
|
|
this->set(store_, capacity);
|
|
std::uninitialized_copy(other.store_, other.store_ + size,
|
|
internal::make_checked(store_, capacity));
|
|
} else {
|
|
this->set(data, capacity);
|
|
// Set pointer to the inline array so that delete is not called
|
|
// when deallocating.
|
|
other.set(other.store_, 0);
|
|
}
|
|
this->resize(size);
|
|
}
|
|
|
|
public:
|
|
/**
|
|
\rst
|
|
Constructs a :class:`fmt::basic_memory_buffer` object moving the content
|
|
of the other object to it.
|
|
\endrst
|
|
*/
|
|
basic_memory_buffer(basic_memory_buffer&& other) { move(other); }
|
|
|
|
/**
|
|
\rst
|
|
Moves the content of the other ``basic_memory_buffer`` object to this one.
|
|
\endrst
|
|
*/
|
|
basic_memory_buffer& operator=(basic_memory_buffer&& other) {
|
|
assert(this != &other);
|
|
deallocate();
|
|
move(other);
|
|
return *this;
|
|
}
|
|
|
|
// 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 basic_memory_buffer<T, SIZE, Allocator>::grow(std::size_t size) {
|
|
std::size_t old_capacity = this->capacity();
|
|
std::size_t new_capacity = old_capacity + old_capacity / 2;
|
|
if (size > new_capacity) new_capacity = size;
|
|
T* old_data = this->data();
|
|
T* new_data = internal::allocate<Allocator>(*this, new_capacity);
|
|
// The following code doesn't throw, so the raw pointer above doesn't leak.
|
|
std::uninitialized_copy(old_data, old_data + this->size(),
|
|
internal::make_checked(new_data, new_capacity));
|
|
this->set(new_data, new_capacity);
|
|
// deallocate must not throw according to the standard, but even if it does,
|
|
// the buffer already uses the new storage and will deallocate it in
|
|
// destructor.
|
|
if (old_data != store_) Allocator::deallocate(old_data, old_capacity);
|
|
}
|
|
|
|
typedef basic_memory_buffer<char> memory_buffer;
|
|
typedef basic_memory_buffer<wchar_t> wmemory_buffer;
|
|
|
|
namespace internal {
|
|
|
|
// A workaround for std::string not having mutable data() until C++17.
|
|
template <typename Char> inline Char* get_data(std::basic_string<Char>& s) {
|
|
return &s[0];
|
|
}
|
|
template <typename Container>
|
|
inline typename Container::value_type* get_data(Container& c) {
|
|
return c.data();
|
|
}
|
|
|
|
template <typename Container, FMT_ENABLE_IF(is_contiguous<Container>::value)>
|
|
inline typename checked<typename Container::value_type>::type reserve(
|
|
std::back_insert_iterator<Container>& it, std::size_t n) {
|
|
Container& c = internal::get_container(it);
|
|
std::size_t size = c.size();
|
|
c.resize(size + n);
|
|
return make_checked(get_data(c) + size, n);
|
|
}
|
|
|
|
template <typename Iterator>
|
|
inline Iterator& reserve(Iterator& it, std::size_t) {
|
|
return it;
|
|
}
|
|
|
|
template <typename Char> class null_terminating_iterator;
|
|
|
|
template <typename Char>
|
|
FMT_CONSTEXPR_DECL const Char* pointer_from(null_terminating_iterator<Char> it);
|
|
|
|
// An output iterator that counts the number of objects written to it and
|
|
// discards them.
|
|
template <typename T> class counting_iterator {
|
|
private:
|
|
std::size_t count_;
|
|
mutable T blackhole_;
|
|
|
|
public:
|
|
typedef std::output_iterator_tag iterator_category;
|
|
typedef T value_type;
|
|
typedef std::ptrdiff_t difference_type;
|
|
typedef T* pointer;
|
|
typedef T& reference;
|
|
typedef counting_iterator _Unchecked_type; // Mark iterator as checked.
|
|
|
|
counting_iterator() : count_(0) {}
|
|
|
|
std::size_t count() const { return count_; }
|
|
|
|
counting_iterator& operator++() {
|
|
++count_;
|
|
return *this;
|
|
}
|
|
|
|
counting_iterator operator++(int) {
|
|
auto it = *this;
|
|
++*this;
|
|
return it;
|
|
}
|
|
|
|
T& operator*() const { return blackhole_; }
|
|
};
|
|
|
|
template <typename OutputIt> class truncating_iterator_base {
|
|
protected:
|
|
OutputIt out_;
|
|
std::size_t limit_;
|
|
std::size_t count_;
|
|
|
|
truncating_iterator_base(OutputIt out, std::size_t limit)
|
|
: out_(out), limit_(limit), count_(0) {}
|
|
|
|
public:
|
|
typedef std::output_iterator_tag iterator_category;
|
|
typedef void difference_type;
|
|
typedef void pointer;
|
|
typedef void reference;
|
|
typedef truncating_iterator_base
|
|
_Unchecked_type; // Mark iterator as checked.
|
|
|
|
OutputIt base() const { return out_; }
|
|
std::size_t count() const { return count_; }
|
|
};
|
|
|
|
// An output iterator that truncates the output and counts the number of objects
|
|
// written to it.
|
|
template <typename OutputIt,
|
|
typename Enable = typename std::is_void<
|
|
typename std::iterator_traits<OutputIt>::value_type>::type>
|
|
class truncating_iterator;
|
|
|
|
template <typename OutputIt>
|
|
class truncating_iterator<OutputIt, std::false_type>
|
|
: public truncating_iterator_base<OutputIt> {
|
|
typedef std::iterator_traits<OutputIt> traits;
|
|
|
|
mutable typename traits::value_type blackhole_;
|
|
|
|
public:
|
|
typedef typename traits::value_type value_type;
|
|
|
|
truncating_iterator(OutputIt out, std::size_t limit)
|
|
: truncating_iterator_base<OutputIt>(out, limit) {}
|
|
|
|
truncating_iterator& operator++() {
|
|
if (this->count_++ < this->limit_) ++this->out_;
|
|
return *this;
|
|
}
|
|
|
|
truncating_iterator operator++(int) {
|
|
auto it = *this;
|
|
++*this;
|
|
return it;
|
|
}
|
|
|
|
value_type& operator*() const {
|
|
return this->count_ < this->limit_ ? *this->out_ : blackhole_;
|
|
}
|
|
};
|
|
|
|
template <typename OutputIt>
|
|
class truncating_iterator<OutputIt, std::true_type>
|
|
: public truncating_iterator_base<OutputIt> {
|
|
public:
|
|
typedef typename OutputIt::container_type::value_type value_type;
|
|
|
|
truncating_iterator(OutputIt out, std::size_t limit)
|
|
: truncating_iterator_base<OutputIt>(out, limit) {}
|
|
|
|
truncating_iterator& operator=(value_type val) {
|
|
if (this->count_++ < this->limit_) this->out_ = val;
|
|
return *this;
|
|
}
|
|
|
|
truncating_iterator& operator++() { return *this; }
|
|
truncating_iterator& operator++(int) { return *this; }
|
|
truncating_iterator& operator*() { return *this; }
|
|
};
|
|
|
|
// 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, FMT_ENABLE_IF(std::numeric_limits<T>::is_signed)>
|
|
FMT_CONSTEXPR bool is_negative(T value) {
|
|
return value < 0;
|
|
}
|
|
template <typename T, FMT_ENABLE_IF(!std::numeric_limits<T>::is_signed)>
|
|
FMT_CONSTEXPR bool is_negative(T) {
|
|
return false;
|
|
}
|
|
|
|
template <typename T> struct int_traits {
|
|
// Smallest of uint32_t and uint64_t that is large enough to represent
|
|
// all values of T.
|
|
using main_type =
|
|
conditional_t<std::numeric_limits<T>::digits <= 32, uint32_t, uint64_t>;
|
|
};
|
|
|
|
// Static data is placed in this class template to allow header-only
|
|
// configuration.
|
|
template <typename T = void> struct FMT_EXTERN_TEMPLATE_API basic_data {
|
|
static const uint64_t POWERS_OF_10_64[];
|
|
static const uint32_t ZERO_OR_POWERS_OF_10_32[];
|
|
static const uint64_t ZERO_OR_POWERS_OF_10_64[];
|
|
static const uint64_t POW10_SIGNIFICANDS[];
|
|
static const int16_t POW10_EXPONENTS[];
|
|
static const char DIGITS[];
|
|
static const char HEX_DIGITS[];
|
|
static const char FOREGROUND_COLOR[];
|
|
static const char BACKGROUND_COLOR[];
|
|
static const char RESET_COLOR[5];
|
|
static const wchar_t WRESET_COLOR[5];
|
|
};
|
|
|
|
FMT_EXTERN template struct basic_data<void>;
|
|
|
|
// This is a struct rather than a typedef to avoid shadowing warnings in gcc.
|
|
struct data : basic_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 int 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 t - (n < data::ZERO_OR_POWERS_OF_10_64[t]) + 1;
|
|
}
|
|
#else
|
|
// Fallback version of count_digits used when __builtin_clz is not available.
|
|
inline int count_digits(uint64_t n) {
|
|
int 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
|
|
|
|
// Counts the number of digits in n. BITS = log2(radix).
|
|
template <unsigned BITS, typename UInt> inline int count_digits(UInt n) {
|
|
int num_digits = 0;
|
|
do {
|
|
++num_digits;
|
|
} while ((n >>= BITS) != 0);
|
|
return num_digits;
|
|
}
|
|
|
|
template <> int count_digits<4>(internal::uintptr_t n);
|
|
|
|
template <typename Char>
|
|
inline size_t count_code_points(basic_string_view<Char> s) {
|
|
return s.size();
|
|
}
|
|
|
|
// Counts the number of code points in a UTF-8 string.
|
|
inline size_t count_code_points(basic_string_view<char8_t> s) {
|
|
const char8_t* data = s.data();
|
|
size_t num_code_points = 0;
|
|
for (size_t i = 0, size = s.size(); i != size; ++i) {
|
|
if ((data[i] & 0xc0) != 0x80) ++num_code_points;
|
|
}
|
|
return num_code_points;
|
|
}
|
|
|
|
inline char8_t to_char8_t(char c) { return static_cast<char8_t>(c); }
|
|
|
|
template <typename InputIt, typename OutChar>
|
|
struct needs_conversion
|
|
: bool_constant<
|
|
std::is_same<typename std::iterator_traits<InputIt>::value_type,
|
|
char>::value &&
|
|
std::is_same<OutChar, char8_t>::value> {};
|
|
|
|
template <typename OutChar, typename InputIt, typename OutputIt,
|
|
FMT_ENABLE_IF(!needs_conversion<InputIt, OutChar>::value)>
|
|
OutputIt copy_str(InputIt begin, InputIt end, OutputIt it) {
|
|
return std::copy(begin, end, it);
|
|
}
|
|
|
|
template <typename OutChar, typename InputIt, typename OutputIt,
|
|
FMT_ENABLE_IF(needs_conversion<InputIt, OutChar>::value)>
|
|
OutputIt copy_str(InputIt begin, InputIt end, OutputIt it) {
|
|
return std::transform(begin, end, it, to_char8_t);
|
|
}
|
|
|
|
#if FMT_HAS_CPP_ATTRIBUTE(always_inline)
|
|
# define FMT_ALWAYS_INLINE __attribute__((always_inline))
|
|
#else
|
|
# define FMT_ALWAYS_INLINE
|
|
#endif
|
|
|
|
template <typename Handler>
|
|
inline char* lg(uint32_t n, Handler h) FMT_ALWAYS_INLINE;
|
|
|
|
// Computes g = floor(log10(n)) and calls h.on<g>(n);
|
|
template <typename Handler> inline char* lg(uint32_t n, Handler h) {
|
|
return n < 100 ? n < 10 ? h.template on<0>(n) : h.template on<1>(n)
|
|
: n < 1000000
|
|
? n < 10000 ? n < 1000 ? h.template on<2>(n)
|
|
: h.template on<3>(n)
|
|
: n < 100000 ? h.template on<4>(n)
|
|
: h.template on<5>(n)
|
|
: n < 100000000 ? n < 10000000 ? h.template on<6>(n)
|
|
: h.template on<7>(n)
|
|
: n < 1000000000 ? h.template on<8>(n)
|
|
: h.template on<9>(n);
|
|
}
|
|
|
|
// An lg handler that formats a decimal number.
|
|
// Usage: lg(n, decimal_formatter(buffer));
|
|
class decimal_formatter {
|
|
private:
|
|
char* buffer_;
|
|
|
|
void write_pair(unsigned N, uint32_t index) {
|
|
std::memcpy(buffer_ + N, data::DIGITS + index * 2, 2);
|
|
}
|
|
|
|
public:
|
|
explicit decimal_formatter(char* buf) : buffer_(buf) {}
|
|
|
|
template <unsigned N> char* on(uint32_t u) {
|
|
if (N == 0) {
|
|
*buffer_ = static_cast<char>(u) + '0';
|
|
} else if (N == 1) {
|
|
write_pair(0, u);
|
|
} else {
|
|
// The idea of using 4.32 fixed-point numbers is based on
|
|
// https://github.com/jeaiii/itoa
|
|
unsigned n = N - 1;
|
|
unsigned a = n / 5 * n * 53 / 16;
|
|
uint64_t t =
|
|
((1ULL << (32 + a)) / data::ZERO_OR_POWERS_OF_10_32[n] + 1 - n / 9);
|
|
t = ((t * u) >> a) + n / 5 * 4;
|
|
write_pair(0, t >> 32);
|
|
for (unsigned i = 2; i < N; i += 2) {
|
|
t = 100ULL * static_cast<uint32_t>(t);
|
|
write_pair(i, t >> 32);
|
|
}
|
|
if (N % 2 == 0) {
|
|
buffer_[N] =
|
|
static_cast<char>((10ULL * static_cast<uint32_t>(t)) >> 32) + '0';
|
|
}
|
|
}
|
|
return buffer_ += N + 1;
|
|
}
|
|
};
|
|
|
|
// An lg handler that formats a decimal number with a terminating null.
|
|
class decimal_formatter_null : public decimal_formatter {
|
|
public:
|
|
explicit decimal_formatter_null(char* buf) : decimal_formatter(buf) {}
|
|
|
|
template <unsigned N> char* on(uint32_t u) {
|
|
char* buf = decimal_formatter::on<N>(u);
|
|
*buf = '\0';
|
|
return buf;
|
|
}
|
|
};
|
|
|
|
#ifdef FMT_BUILTIN_CLZ
|
|
// Optional version of count_digits for better performance on 32-bit platforms.
|
|
inline int count_digits(uint32_t n) {
|
|
int t = (32 - FMT_BUILTIN_CLZ(n | 1)) * 1233 >> 12;
|
|
return t - (n < data::ZERO_OR_POWERS_OF_10_32[t]) + 1;
|
|
}
|
|
#endif
|
|
|
|
// A functor that doesn't add a thousands separator.
|
|
struct no_thousands_sep {
|
|
typedef char char_type;
|
|
|
|
template <typename Char> void operator()(Char*) {}
|
|
|
|
enum { size = 0 };
|
|
};
|
|
|
|
// A functor that adds a thousands separator.
|
|
template <typename Char> class add_thousands_sep {
|
|
private:
|
|
basic_string_view<Char> sep_;
|
|
|
|
// Index of a decimal digit with the least significant digit having index 0.
|
|
unsigned digit_index_;
|
|
|
|
public:
|
|
typedef Char char_type;
|
|
|
|
explicit add_thousands_sep(basic_string_view<Char> sep)
|
|
: sep_(sep), digit_index_(0) {}
|
|
|
|
void operator()(Char*& buffer) {
|
|
if (++digit_index_ % 3 != 0) return;
|
|
buffer -= sep_.size();
|
|
std::uninitialized_copy(sep_.data(), sep_.data() + sep_.size(),
|
|
internal::make_checked(buffer, sep_.size()));
|
|
}
|
|
|
|
enum { size = 1 };
|
|
};
|
|
|
|
template <typename Char> FMT_API Char thousands_sep_impl(locale_ref loc);
|
|
|
|
template <typename Char> inline Char thousands_sep(locale_ref loc) {
|
|
return Char(thousands_sep_impl<char>(loc));
|
|
}
|
|
|
|
template <> inline wchar_t thousands_sep(locale_ref loc) {
|
|
return thousands_sep_impl<wchar_t>(loc);
|
|
}
|
|
|
|
// 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 Char* format_decimal(Char* buffer, UInt value, int num_digits,
|
|
ThousandsSep thousands_sep) {
|
|
FMT_ASSERT(num_digits >= 0, "invalid digit count");
|
|
buffer += num_digits;
|
|
Char* end = buffer;
|
|
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 = static_cast<Char>(data::DIGITS[index + 1]);
|
|
thousands_sep(buffer);
|
|
*--buffer = static_cast<Char>(data::DIGITS[index]);
|
|
thousands_sep(buffer);
|
|
}
|
|
if (value < 10) {
|
|
*--buffer = static_cast<Char>('0' + value);
|
|
return end;
|
|
}
|
|
unsigned index = static_cast<unsigned>(value * 2);
|
|
*--buffer = static_cast<Char>(data::DIGITS[index + 1]);
|
|
thousands_sep(buffer);
|
|
*--buffer = static_cast<Char>(data::DIGITS[index]);
|
|
return end;
|
|
}
|
|
|
|
template <typename OutChar, typename UInt, typename Iterator,
|
|
typename ThousandsSep>
|
|
inline Iterator format_decimal(Iterator out, UInt value, int num_digits,
|
|
ThousandsSep sep) {
|
|
FMT_ASSERT(num_digits >= 0, "invalid digit count");
|
|
typedef typename ThousandsSep::char_type char_type;
|
|
// Buffer should be large enough to hold all digits (<= digits10 + 1).
|
|
enum { max_size = std::numeric_limits<UInt>::digits10 + 1 };
|
|
FMT_ASSERT(ThousandsSep::size <= 1, "invalid separator");
|
|
char_type buffer[max_size + max_size / 3];
|
|
auto end = format_decimal(buffer, value, num_digits, sep);
|
|
return internal::copy_str<OutChar>(buffer, end, out);
|
|
}
|
|
|
|
template <typename OutChar, typename It, typename UInt>
|
|
inline It format_decimal(It out, UInt value, int num_digits) {
|
|
return format_decimal<OutChar>(out, value, num_digits, no_thousands_sep());
|
|
}
|
|
|
|
template <unsigned BASE_BITS, typename Char, typename UInt>
|
|
inline Char* format_uint(Char* buffer, UInt value, int num_digits,
|
|
bool upper = false) {
|
|
buffer += num_digits;
|
|
Char* end = buffer;
|
|
do {
|
|
const char* digits = upper ? "0123456789ABCDEF" : data::HEX_DIGITS;
|
|
unsigned digit = (value & ((1 << BASE_BITS) - 1));
|
|
*--buffer = static_cast<Char>(BASE_BITS < 4 ? static_cast<char>('0' + digit)
|
|
: digits[digit]);
|
|
} while ((value >>= BASE_BITS) != 0);
|
|
return end;
|
|
}
|
|
|
|
template <unsigned BASE_BITS, typename Char>
|
|
Char* format_uint(Char* buffer, internal::uintptr_t n, int num_digits,
|
|
bool = false) {
|
|
auto char_digits = std::numeric_limits<unsigned char>::digits / 4;
|
|
int start = (num_digits + char_digits - 1) / char_digits - 1;
|
|
if (int start_digits = num_digits % char_digits) {
|
|
unsigned value = n.value[start--];
|
|
buffer = format_uint<BASE_BITS>(buffer, value, start_digits);
|
|
}
|
|
for (; start >= 0; --start) {
|
|
unsigned value = n.value[start];
|
|
buffer += char_digits;
|
|
auto p = buffer;
|
|
for (int i = 0; i < char_digits; ++i) {
|
|
unsigned digit = (value & ((1 << BASE_BITS) - 1));
|
|
*--p = static_cast<Char>(data::HEX_DIGITS[digit]);
|
|
value >>= BASE_BITS;
|
|
}
|
|
}
|
|
return buffer;
|
|
}
|
|
|
|
template <unsigned BASE_BITS, typename Char, typename It, typename UInt>
|
|
inline It format_uint(It out, UInt value, int num_digits, bool upper = false) {
|
|
// Buffer should be large enough to hold all digits (digits / BASE_BITS + 1)
|
|
// and null.
|
|
char buffer[std::numeric_limits<UInt>::digits / BASE_BITS + 2];
|
|
format_uint<BASE_BITS>(buffer, value, num_digits, upper);
|
|
return internal::copy_str<Char>(buffer, buffer + num_digits, out);
|
|
}
|
|
|
|
#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 utf8_to_utf16 {
|
|
private:
|
|
wmemory_buffer buffer_;
|
|
|
|
public:
|
|
FMT_API explicit utf8_to_utf16(string_view s);
|
|
operator wstring_view() const { return wstring_view(&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 utf16_to_utf8 {
|
|
private:
|
|
memory_buffer buffer_;
|
|
|
|
public:
|
|
utf16_to_utf8() {}
|
|
FMT_API explicit utf16_to_utf8(wstring_view s);
|
|
operator string_view() const { return string_view(&buffer_[0], size()); }
|
|
size_t size() const { return buffer_.size() - 1; }
|
|
const char* c_str() const { return &buffer_[0]; }
|
|
std::string str() const { return std::string(&buffer_[0], size()); }
|
|
|
|
// Performs conversion returning a system error code instead of
|
|
// throwing exception on conversion error. This method may still throw
|
|
// in case of memory allocation error.
|
|
FMT_API int convert(wstring_view s);
|
|
};
|
|
|
|
FMT_API void format_windows_error(fmt::internal::buffer<char>& out,
|
|
int error_code,
|
|
fmt::string_view message) FMT_NOEXCEPT;
|
|
#endif
|
|
|
|
template <typename T = void> struct null {};
|
|
} // namespace internal
|
|
|
|
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 };
|
|
|
|
// An alignment specifier.
|
|
struct align_spec {
|
|
unsigned width_;
|
|
// Fill is always wchar_t and cast to char if necessary to avoid having
|
|
// two specialization of AlignSpec and its subclasses.
|
|
wchar_t fill_;
|
|
alignment align_;
|
|
|
|
FMT_CONSTEXPR align_spec() : width_(0), fill_(' '), align_(ALIGN_DEFAULT) {}
|
|
FMT_CONSTEXPR unsigned width() const { return width_; }
|
|
FMT_CONSTEXPR wchar_t fill() const { return fill_; }
|
|
FMT_CONSTEXPR alignment align() const { return align_; }
|
|
};
|
|
|
|
struct core_format_specs {
|
|
int precision;
|
|
uint_least8_t flags;
|
|
char type;
|
|
|
|
FMT_CONSTEXPR core_format_specs() : precision(-1), flags(0), type(0) {}
|
|
FMT_CONSTEXPR bool has(unsigned f) const { return (flags & f) != 0; }
|
|
FMT_CONSTEXPR bool has_precision() const { return precision != -1; }
|
|
};
|
|
|
|
// Format specifiers.
|
|
template <typename Char>
|
|
struct basic_format_specs : align_spec, core_format_specs {
|
|
FMT_CONSTEXPR basic_format_specs() {}
|
|
};
|
|
|
|
typedef basic_format_specs<char> format_specs;
|
|
|
|
namespace internal {
|
|
|
|
namespace grisu_options {
|
|
enum { fixed = 1, grisu3 = 2 };
|
|
}
|
|
|
|
// Formats value using the Grisu algorithm:
|
|
// https://www.cs.tufts.edu/~nr/cs257/archive/florian-loitsch/printf.pdf
|
|
template <typename Double, FMT_ENABLE_IF(sizeof(Double) == sizeof(uint64_t))>
|
|
FMT_API bool grisu_format(Double, buffer<char>&, int, unsigned, int&);
|
|
template <typename Double, FMT_ENABLE_IF(sizeof(Double) != sizeof(uint64_t))>
|
|
inline bool grisu_format(Double, buffer<char>&, int, unsigned, int&) {
|
|
return false;
|
|
}
|
|
|
|
struct gen_digits_params {
|
|
int num_digits;
|
|
bool fixed;
|
|
bool upper;
|
|
bool trailing_zeros;
|
|
};
|
|
|
|
// Writes the exponent exp in the form "[+-]d{2,3}" to buffer.
|
|
template <typename Char, typename It> It write_exponent(int exp, It it) {
|
|
FMT_ASSERT(-1000 < exp && exp < 1000, "exponent out of range");
|
|
if (exp < 0) {
|
|
*it++ = static_cast<Char>('-');
|
|
exp = -exp;
|
|
} else {
|
|
*it++ = static_cast<Char>('+');
|
|
}
|
|
if (exp >= 100) {
|
|
*it++ = static_cast<Char>(static_cast<char>('0' + exp / 100));
|
|
exp %= 100;
|
|
const char* d = data::DIGITS + exp * 2;
|
|
*it++ = static_cast<Char>(d[0]);
|
|
*it++ = static_cast<Char>(d[1]);
|
|
} else {
|
|
const char* d = data::DIGITS + exp * 2;
|
|
*it++ = static_cast<Char>(d[0]);
|
|
*it++ = static_cast<Char>(d[1]);
|
|
}
|
|
return it;
|
|
}
|
|
|
|
// The number is given as v = digits * pow(10, exp).
|
|
template <typename Char, typename It>
|
|
It grisu_prettify(const char* digits, int size, int exp, It it,
|
|
gen_digits_params params) {
|
|
// pow(10, full_exp - 1) <= v <= pow(10, full_exp).
|
|
int full_exp = size + exp;
|
|
if (!params.fixed) {
|
|
// Insert a decimal point after the first digit and add an exponent.
|
|
*it++ = static_cast<Char>(*digits);
|
|
if (size > 1) *it++ = static_cast<Char>('.');
|
|
exp += size - 1;
|
|
it = copy_str<Char>(digits + 1, digits + size, it);
|
|
if (size < params.num_digits)
|
|
it = std::fill_n(it, params.num_digits - size, static_cast<Char>('0'));
|
|
*it++ = static_cast<Char>(params.upper ? 'E' : 'e');
|
|
return write_exponent<Char>(exp, it);
|
|
}
|
|
if (size <= full_exp) {
|
|
// 1234e7 -> 12340000000[.0+]
|
|
it = copy_str<Char>(digits, digits + size, it);
|
|
it = std::fill_n(it, full_exp - size, static_cast<Char>('0'));
|
|
int num_zeros = (std::max)(params.num_digits - full_exp, 1);
|
|
if (params.trailing_zeros) {
|
|
*it++ = static_cast<Char>('.');
|
|
it = std::fill_n(it, num_zeros, static_cast<Char>('0'));
|
|
}
|
|
} else if (full_exp > 0) {
|
|
// 1234e-2 -> 12.34[0+]
|
|
it = copy_str<Char>(digits, digits + full_exp, it);
|
|
if (!params.trailing_zeros) {
|
|
// Remove trailing zeros.
|
|
while (size > full_exp && digits[size - 1] == '0') --size;
|
|
if (size != full_exp) *it++ = static_cast<Char>('.');
|
|
return copy_str<Char>(digits + full_exp, digits + size, it);
|
|
}
|
|
*it++ = static_cast<Char>('.');
|
|
it = copy_str<Char>(digits + full_exp, digits + size, it);
|
|
if (params.num_digits > size) {
|
|
// Add trailing zeros.
|
|
int num_zeros = params.num_digits - size;
|
|
it = std::fill_n(it, num_zeros, static_cast<Char>('0'));
|
|
}
|
|
} else {
|
|
// 1234e-6 -> 0.001234
|
|
*it++ = static_cast<Char>('0');
|
|
*it++ = static_cast<Char>('.');
|
|
int num_zeros = -full_exp;
|
|
if (params.num_digits >= 0 && params.num_digits < num_zeros)
|
|
num_zeros = params.num_digits;
|
|
it = std::fill_n(it, num_zeros, static_cast<Char>('0'));
|
|
if (!params.trailing_zeros)
|
|
while (size > 0 && digits[size - 1] == '0') --size;
|
|
it = copy_str<Char>(digits, digits + size, it);
|
|
}
|
|
return it;
|
|
}
|
|
|
|
template <typename Double>
|
|
void sprintf_format(Double, internal::buffer<char>&, core_format_specs);
|
|
|
|
template <typename Handler>
|
|
FMT_CONSTEXPR void handle_int_type_spec(char spec, Handler&& handler) {
|
|
switch (spec) {
|
|
case 0:
|
|
case 'd':
|
|
handler.on_dec();
|
|
break;
|
|
case 'x':
|
|
case 'X':
|
|
handler.on_hex();
|
|
break;
|
|
case 'b':
|
|
case 'B':
|
|
handler.on_bin();
|
|
break;
|
|
case 'o':
|
|
handler.on_oct();
|
|
break;
|
|
case 'n':
|
|
handler.on_num();
|
|
break;
|
|
default:
|
|
handler.on_error();
|
|
}
|
|
}
|
|
|
|
template <typename Handler>
|
|
FMT_CONSTEXPR void handle_float_type_spec(char spec, Handler&& handler) {
|
|
switch (spec) {
|
|
case 0:
|
|
case 'g':
|
|
case 'G':
|
|
handler.on_general();
|
|
break;
|
|
case 'e':
|
|
case 'E':
|
|
handler.on_exp();
|
|
break;
|
|
case 'f':
|
|
case 'F':
|
|
handler.on_fixed();
|
|
break;
|
|
case '%':
|
|
handler.on_percent();
|
|
break;
|
|
case 'a':
|
|
case 'A':
|
|
handler.on_hex();
|
|
break;
|
|
default:
|
|
handler.on_error();
|
|
break;
|
|
}
|
|
}
|
|
|
|
template <typename Char, typename Handler>
|
|
FMT_CONSTEXPR void handle_char_specs(const basic_format_specs<Char>* specs,
|
|
Handler&& handler) {
|
|
if (!specs) return handler.on_char();
|
|
if (specs->type && specs->type != 'c') return handler.on_int();
|
|
if (specs->align() == ALIGN_NUMERIC || specs->flags != 0)
|
|
handler.on_error("invalid format specifier for char");
|
|
handler.on_char();
|
|
}
|
|
|
|
template <typename Char, typename Handler>
|
|
FMT_CONSTEXPR void handle_cstring_type_spec(Char spec, Handler&& handler) {
|
|
if (spec == 0 || spec == 's')
|
|
handler.on_string();
|
|
else if (spec == 'p')
|
|
handler.on_pointer();
|
|
else
|
|
handler.on_error("invalid type specifier");
|
|
}
|
|
|
|
template <typename Char, typename ErrorHandler>
|
|
FMT_CONSTEXPR void check_string_type_spec(Char spec, ErrorHandler&& eh) {
|
|
if (spec != 0 && spec != 's') eh.on_error("invalid type specifier");
|
|
}
|
|
|
|
template <typename Char, typename ErrorHandler>
|
|
FMT_CONSTEXPR void check_pointer_type_spec(Char spec, ErrorHandler&& eh) {
|
|
if (spec != 0 && spec != 'p') eh.on_error("invalid type specifier");
|
|
}
|
|
|
|
template <typename ErrorHandler> class int_type_checker : private ErrorHandler {
|
|
public:
|
|
FMT_CONSTEXPR explicit int_type_checker(ErrorHandler eh) : ErrorHandler(eh) {}
|
|
|
|
FMT_CONSTEXPR void on_dec() {}
|
|
FMT_CONSTEXPR void on_hex() {}
|
|
FMT_CONSTEXPR void on_bin() {}
|
|
FMT_CONSTEXPR void on_oct() {}
|
|
FMT_CONSTEXPR void on_num() {}
|
|
|
|
FMT_CONSTEXPR void on_error() {
|
|
ErrorHandler::on_error("invalid type specifier");
|
|
}
|
|
};
|
|
|
|
template <typename ErrorHandler>
|
|
class float_type_checker : private ErrorHandler {
|
|
public:
|
|
FMT_CONSTEXPR explicit float_type_checker(ErrorHandler eh)
|
|
: ErrorHandler(eh) {}
|
|
|
|
FMT_CONSTEXPR void on_general() {}
|
|
FMT_CONSTEXPR void on_exp() {}
|
|
FMT_CONSTEXPR void on_fixed() {}
|
|
FMT_CONSTEXPR void on_percent() {}
|
|
FMT_CONSTEXPR void on_hex() {}
|
|
|
|
FMT_CONSTEXPR void on_error() {
|
|
ErrorHandler::on_error("invalid type specifier");
|
|
}
|
|
};
|
|
|
|
template <typename ErrorHandler>
|
|
class char_specs_checker : public ErrorHandler {
|
|
private:
|
|
char type_;
|
|
|
|
public:
|
|
FMT_CONSTEXPR char_specs_checker(char type, ErrorHandler eh)
|
|
: ErrorHandler(eh), type_(type) {}
|
|
|
|
FMT_CONSTEXPR void on_int() {
|
|
handle_int_type_spec(type_, int_type_checker<ErrorHandler>(*this));
|
|
}
|
|
FMT_CONSTEXPR void on_char() {}
|
|
};
|
|
|
|
template <typename ErrorHandler>
|
|
class cstring_type_checker : public ErrorHandler {
|
|
public:
|
|
FMT_CONSTEXPR explicit cstring_type_checker(ErrorHandler eh)
|
|
: ErrorHandler(eh) {}
|
|
|
|
FMT_CONSTEXPR void on_string() {}
|
|
FMT_CONSTEXPR void on_pointer() {}
|
|
};
|
|
|
|
template <typename Context>
|
|
void arg_map<Context>::init(const basic_format_args<Context>& args) {
|
|
if (map_) return;
|
|
map_ = new entry[args.max_size()];
|
|
if (args.is_packed()) {
|
|
for (unsigned i = 0; /*nothing*/; ++i) {
|
|
internal::type arg_type = args.type(i);
|
|
switch (arg_type) {
|
|
case internal::none_type:
|
|
return;
|
|
case internal::named_arg_type:
|
|
push_back(args.values_[i]);
|
|
break;
|
|
default:
|
|
break; // Do nothing.
|
|
}
|
|
}
|
|
}
|
|
for (unsigned i = 0;; ++i) {
|
|
switch (args.args_[i].type_) {
|
|
case internal::none_type:
|
|
return;
|
|
case internal::named_arg_type:
|
|
push_back(args.args_[i].value_);
|
|
break;
|
|
default:
|
|
break; // Do nothing.
|
|
}
|
|
}
|
|
}
|
|
|
|
template <typename Range, typename ErrorHandler = internal::error_handler>
|
|
class arg_formatter_base {
|
|
public:
|
|
typedef typename Range::value_type char_type;
|
|
typedef decltype(std::declval<Range>().begin()) iterator;
|
|
typedef basic_format_specs<char_type> format_specs;
|
|
|
|
private:
|
|
typedef basic_writer<Range> writer_type;
|
|
writer_type writer_;
|
|
format_specs* specs_;
|
|
|
|
struct char_writer {
|
|
char_type value;
|
|
|
|
size_t size() const { return 1; }
|
|
size_t width() const { return 1; }
|
|
|
|
template <typename It> void operator()(It&& it) const { *it++ = value; }
|
|
};
|
|
|
|
void write_char(char_type value) {
|
|
if (specs_)
|
|
writer_.write_padded(*specs_, char_writer{value});
|
|
else
|
|
writer_.write(value);
|
|
}
|
|
|
|
void write_pointer(const void* p) {
|
|
writer_.write_pointer(internal::numutil::to_uint(p), specs_);
|
|
}
|
|
|
|
protected:
|
|
writer_type& writer() { return writer_; }
|
|
format_specs* spec() { return specs_; }
|
|
iterator out() { return writer_.out(); }
|
|
|
|
void write(bool value) {
|
|
string_view sv(value ? "true" : "false");
|
|
specs_ ? writer_.write(sv, *specs_) : writer_.write(sv);
|
|
}
|
|
|
|
void write(const char_type* value) {
|
|
if (!value) FMT_THROW(format_error("string pointer is null"));
|
|
auto length = std::char_traits<char_type>::length(value);
|
|
basic_string_view<char_type> sv(value, length);
|
|
specs_ ? writer_.write(sv, *specs_) : writer_.write(sv);
|
|
}
|
|
|
|
public:
|
|
arg_formatter_base(Range r, format_specs* s, locale_ref loc)
|
|
: writer_(r, loc), specs_(s) {}
|
|
|
|
iterator operator()(monostate) {
|
|
FMT_ASSERT(false, "invalid argument type");
|
|
return out();
|
|
}
|
|
|
|
template <typename T, FMT_ENABLE_IF(std::is_integral<T>::value ||
|
|
std::is_same<T, char_type>::value)>
|
|
iterator operator()(T value) {
|
|
// MSVC2013 fails to compile separate overloads for bool and char_type so
|
|
// use std::is_same instead.
|
|
if (std::is_same<T, bool>::value) {
|
|
if (specs_ && specs_->type) return (*this)(value ? 1 : 0);
|
|
write(value != 0);
|
|
} else if (std::is_same<T, char_type>::value) {
|
|
internal::handle_char_specs(
|
|
specs_, char_spec_handler(*this, static_cast<char_type>(value)));
|
|
} else {
|
|
specs_ ? writer_.write_int(value, *specs_) : writer_.write(value);
|
|
}
|
|
return out();
|
|
}
|
|
|
|
template <typename T, FMT_ENABLE_IF(std::is_floating_point<T>::value)>
|
|
iterator operator()(T value) {
|
|
writer_.write_double(value, specs_ ? *specs_ : format_specs());
|
|
return out();
|
|
}
|
|
|
|
struct char_spec_handler : ErrorHandler {
|
|
arg_formatter_base& formatter;
|
|
char_type value;
|
|
|
|
char_spec_handler(arg_formatter_base& f, char_type val)
|
|
: formatter(f), value(val) {}
|
|
|
|
void on_int() {
|
|
if (formatter.specs_)
|
|
formatter.writer_.write_int(value, *formatter.specs_);
|
|
else
|
|
formatter.writer_.write(value);
|
|
}
|
|
void on_char() { formatter.write_char(value); }
|
|
};
|
|
|
|
struct cstring_spec_handler : internal::error_handler {
|
|
arg_formatter_base& formatter;
|
|
const char_type* value;
|
|
|
|
cstring_spec_handler(arg_formatter_base& f, const char_type* val)
|
|
: formatter(f), value(val) {}
|
|
|
|
void on_string() { formatter.write(value); }
|
|
void on_pointer() { formatter.write_pointer(value); }
|
|
};
|
|
|
|
iterator operator()(const char_type* value) {
|
|
if (!specs_) return write(value), out();
|
|
internal::handle_cstring_type_spec(specs_->type,
|
|
cstring_spec_handler(*this, value));
|
|
return out();
|
|
}
|
|
|
|
iterator operator()(basic_string_view<char_type> value) {
|
|
if (specs_) {
|
|
internal::check_string_type_spec(specs_->type, internal::error_handler());
|
|
writer_.write(value, *specs_);
|
|
} else {
|
|
writer_.write(value);
|
|
}
|
|
return out();
|
|
}
|
|
|
|
iterator operator()(const void* value) {
|
|
if (specs_)
|
|
check_pointer_type_spec(specs_->type, internal::error_handler());
|
|
write_pointer(value);
|
|
return out();
|
|
}
|
|
};
|
|
|
|
template <typename Char> FMT_CONSTEXPR bool is_name_start(Char c) {
|
|
return ('a' <= c && c <= 'z') || ('A' <= c && c <= 'Z') || '_' == c;
|
|
}
|
|
|
|
// Parses the range [begin, end) as an unsigned integer. This function assumes
|
|
// that the range is non-empty and the first character is a digit.
|
|
template <typename Char, typename ErrorHandler>
|
|
FMT_CONSTEXPR unsigned parse_nonnegative_int(const Char*& begin,
|
|
const Char* end,
|
|
ErrorHandler&& eh) {
|
|
assert(begin != end && '0' <= *begin && *begin <= '9');
|
|
if (*begin == '0') {
|
|
++begin;
|
|
return 0;
|
|
}
|
|
unsigned value = 0;
|
|
// Convert to unsigned to prevent a warning.
|
|
unsigned max_int = (std::numeric_limits<int>::max)();
|
|
unsigned big = max_int / 10;
|
|
do {
|
|
// Check for overflow.
|
|
if (value > big) {
|
|
value = max_int + 1;
|
|
break;
|
|
}
|
|
value = value * 10 + unsigned(*begin - '0');
|
|
++begin;
|
|
} while (begin != end && '0' <= *begin && *begin <= '9');
|
|
if (value > max_int) eh.on_error("number is too big");
|
|
return value;
|
|
}
|
|
|
|
template <typename Context> class custom_formatter : public function<bool> {
|
|
private:
|
|
typedef typename Context::char_type char_type;
|
|
|
|
basic_parse_context<char_type>& parse_ctx_;
|
|
Context& ctx_;
|
|
|
|
public:
|
|
explicit custom_formatter(basic_parse_context<char_type>& parse_ctx,
|
|
Context& ctx)
|
|
: parse_ctx_(parse_ctx), ctx_(ctx) {}
|
|
|
|
bool operator()(typename basic_format_arg<Context>::handle h) const {
|
|
h.format(parse_ctx_, ctx_);
|
|
return true;
|
|
}
|
|
|
|
template <typename T> bool operator()(T) const { return false; }
|
|
};
|
|
|
|
template <typename T> struct is_integer {
|
|
enum {
|
|
value = std::is_integral<T>::value && !std::is_same<T, bool>::value &&
|
|
!std::is_same<T, char>::value && !std::is_same<T, wchar_t>::value
|
|
};
|
|
};
|
|
|
|
template <typename ErrorHandler>
|
|
class width_checker : public function<unsigned long long> {
|
|
public:
|
|
explicit FMT_CONSTEXPR width_checker(ErrorHandler& eh) : handler_(eh) {}
|
|
|
|
template <typename T, FMT_ENABLE_IF(is_integer<T>::value)>
|
|
FMT_CONSTEXPR unsigned long long operator()(T value) {
|
|
if (is_negative(value)) handler_.on_error("negative width");
|
|
return static_cast<unsigned long long>(value);
|
|
}
|
|
|
|
template <typename T, FMT_ENABLE_IF(!is_integer<T>::value)>
|
|
FMT_CONSTEXPR unsigned long long operator()(T) {
|
|
handler_.on_error("width is not integer");
|
|
return 0;
|
|
}
|
|
|
|
private:
|
|
ErrorHandler& handler_;
|
|
};
|
|
|
|
template <typename ErrorHandler>
|
|
class precision_checker : public function<unsigned long long> {
|
|
public:
|
|
explicit FMT_CONSTEXPR precision_checker(ErrorHandler& eh) : handler_(eh) {}
|
|
|
|
template <typename T, FMT_ENABLE_IF(is_integer<T>::value)>
|
|
FMT_CONSTEXPR unsigned long long operator()(T value) {
|
|
if (is_negative(value)) handler_.on_error("negative precision");
|
|
return static_cast<unsigned long long>(value);
|
|
}
|
|
|
|
template <typename T, FMT_ENABLE_IF(!is_integer<T>::value)>
|
|
FMT_CONSTEXPR unsigned long long operator()(T) {
|
|
handler_.on_error("precision is not integer");
|
|
return 0;
|
|
}
|
|
|
|
private:
|
|
ErrorHandler& handler_;
|
|
};
|
|
|
|
// A format specifier handler that sets fields in basic_format_specs.
|
|
template <typename Char> class specs_setter {
|
|
public:
|
|
explicit FMT_CONSTEXPR specs_setter(basic_format_specs<Char>& specs)
|
|
: specs_(specs) {}
|
|
|
|
FMT_CONSTEXPR specs_setter(const specs_setter& other)
|
|
: specs_(other.specs_) {}
|
|
|
|
FMT_CONSTEXPR void on_align(alignment align) { specs_.align_ = align; }
|
|
FMT_CONSTEXPR void on_fill(Char fill) { specs_.fill_ = fill; }
|
|
FMT_CONSTEXPR void on_plus() { specs_.flags |= SIGN_FLAG | PLUS_FLAG; }
|
|
FMT_CONSTEXPR void on_minus() { specs_.flags |= MINUS_FLAG; }
|
|
FMT_CONSTEXPR void on_space() { specs_.flags |= SIGN_FLAG; }
|
|
FMT_CONSTEXPR void on_hash() { specs_.flags |= HASH_FLAG; }
|
|
|
|
FMT_CONSTEXPR void on_zero() {
|
|
specs_.align_ = ALIGN_NUMERIC;
|
|
specs_.fill_ = '0';
|
|
}
|
|
|
|
FMT_CONSTEXPR void on_width(unsigned width) { specs_.width_ = width; }
|
|
FMT_CONSTEXPR void on_precision(unsigned precision) {
|
|
specs_.precision = static_cast<int>(precision);
|
|
}
|
|
FMT_CONSTEXPR void end_precision() {}
|
|
|
|
FMT_CONSTEXPR void on_type(Char type) {
|
|
specs_.type = static_cast<char>(type);
|
|
}
|
|
|
|
protected:
|
|
basic_format_specs<Char>& specs_;
|
|
};
|
|
|
|
template <typename ErrorHandler> class numeric_specs_checker {
|
|
public:
|
|
FMT_CONSTEXPR numeric_specs_checker(ErrorHandler& eh, internal::type arg_type)
|
|
: error_handler_(eh), arg_type_(arg_type) {}
|
|
|
|
FMT_CONSTEXPR void require_numeric_argument() {
|
|
if (!is_arithmetic(arg_type_))
|
|
error_handler_.on_error("format specifier requires numeric argument");
|
|
}
|
|
|
|
FMT_CONSTEXPR void check_sign() {
|
|
require_numeric_argument();
|
|
if (is_integral(arg_type_) && arg_type_ != int_type &&
|
|
arg_type_ != long_long_type && arg_type_ != internal::char_type) {
|
|
error_handler_.on_error("format specifier requires signed argument");
|
|
}
|
|
}
|
|
|
|
FMT_CONSTEXPR void check_precision() {
|
|
if (is_integral(arg_type_) || arg_type_ == internal::pointer_type)
|
|
error_handler_.on_error("precision not allowed for this argument type");
|
|
}
|
|
|
|
private:
|
|
ErrorHandler& error_handler_;
|
|
internal::type arg_type_;
|
|
};
|
|
|
|
// A format specifier handler that checks if specifiers are consistent with the
|
|
// argument type.
|
|
template <typename Handler> class specs_checker : public Handler {
|
|
public:
|
|
FMT_CONSTEXPR specs_checker(const Handler& handler, internal::type arg_type)
|
|
: Handler(handler), checker_(*this, arg_type) {}
|
|
|
|
FMT_CONSTEXPR specs_checker(const specs_checker& other)
|
|
: Handler(other), checker_(*this, other.arg_type_) {}
|
|
|
|
FMT_CONSTEXPR void on_align(alignment align) {
|
|
if (align == ALIGN_NUMERIC) checker_.require_numeric_argument();
|
|
Handler::on_align(align);
|
|
}
|
|
|
|
FMT_CONSTEXPR void on_plus() {
|
|
checker_.check_sign();
|
|
Handler::on_plus();
|
|
}
|
|
|
|
FMT_CONSTEXPR void on_minus() {
|
|
checker_.check_sign();
|
|
Handler::on_minus();
|
|
}
|
|
|
|
FMT_CONSTEXPR void on_space() {
|
|
checker_.check_sign();
|
|
Handler::on_space();
|
|
}
|
|
|
|
FMT_CONSTEXPR void on_hash() {
|
|
checker_.require_numeric_argument();
|
|
Handler::on_hash();
|
|
}
|
|
|
|
FMT_CONSTEXPR void on_zero() {
|
|
checker_.require_numeric_argument();
|
|
Handler::on_zero();
|
|
}
|
|
|
|
FMT_CONSTEXPR void end_precision() { checker_.check_precision(); }
|
|
|
|
private:
|
|
numeric_specs_checker<Handler> checker_;
|
|
};
|
|
|
|
template <template <typename> class Handler, typename T, typename FormatArg,
|
|
typename ErrorHandler>
|
|
FMT_CONSTEXPR void set_dynamic_spec(T& value, FormatArg arg, ErrorHandler eh) {
|
|
unsigned long long big_value =
|
|
visit_format_arg(Handler<ErrorHandler>(eh), arg);
|
|
if (big_value > to_unsigned((std::numeric_limits<int>::max)()))
|
|
eh.on_error("number is too big");
|
|
value = static_cast<T>(big_value);
|
|
}
|
|
|
|
struct auto_id {};
|
|
|
|
// The standard format specifier handler with checking.
|
|
template <typename ParseContext, typename Context>
|
|
class specs_handler : public specs_setter<typename Context::char_type> {
|
|
public:
|
|
typedef typename Context::char_type char_type;
|
|
|
|
FMT_CONSTEXPR specs_handler(basic_format_specs<char_type>& specs,
|
|
ParseContext& parse_ctx, Context& ctx)
|
|
: specs_setter<char_type>(specs),
|
|
parse_context_(parse_ctx),
|
|
context_(ctx) {}
|
|
|
|
template <typename Id> FMT_CONSTEXPR void on_dynamic_width(Id arg_id) {
|
|
set_dynamic_spec<width_checker>(this->specs_.width_, get_arg(arg_id),
|
|
context_.error_handler());
|
|
}
|
|
|
|
template <typename Id> FMT_CONSTEXPR void on_dynamic_precision(Id arg_id) {
|
|
set_dynamic_spec<precision_checker>(this->specs_.precision, get_arg(arg_id),
|
|
context_.error_handler());
|
|
}
|
|
|
|
void on_error(const char* message) { context_.on_error(message); }
|
|
|
|
private:
|
|
// This is only needed for compatibility with gcc 4.4.
|
|
typedef typename Context::format_arg format_arg;
|
|
|
|
FMT_CONSTEXPR format_arg get_arg(auto_id) {
|
|
return internal::get_arg(context_, parse_context_.next_arg_id());
|
|
}
|
|
|
|
FMT_CONSTEXPR format_arg get_arg(unsigned arg_id) {
|
|
parse_context_.check_arg_id(arg_id);
|
|
return internal::get_arg(context_, arg_id);
|
|
}
|
|
|
|
FMT_CONSTEXPR format_arg get_arg(basic_string_view<char_type> arg_id) {
|
|
parse_context_.check_arg_id(arg_id);
|
|
return context_.arg(arg_id);
|
|
}
|
|
|
|
ParseContext& parse_context_;
|
|
Context& context_;
|
|
};
|
|
|
|
struct string_view_metadata {
|
|
FMT_CONSTEXPR string_view_metadata() : offset_(0u), size_(0u) {}
|
|
template <typename Char>
|
|
FMT_CONSTEXPR string_view_metadata(basic_string_view<Char> primary_string,
|
|
basic_string_view<Char> view)
|
|
: offset_(view.data() - primary_string.data()), size_(view.size()) {}
|
|
FMT_CONSTEXPR string_view_metadata(std::size_t offset, std::size_t size)
|
|
: offset_(offset), size_(size) {}
|
|
template <typename Char>
|
|
FMT_CONSTEXPR basic_string_view<Char> to_view(const Char* str) const {
|
|
return {str + offset_, size_};
|
|
}
|
|
|
|
std::size_t offset_;
|
|
std::size_t size_;
|
|
};
|
|
|
|
// An argument reference.
|
|
template <typename Char> struct arg_ref {
|
|
enum Kind { NONE, INDEX, NAME };
|
|
typedef Char char_type;
|
|
|
|
FMT_CONSTEXPR arg_ref() : kind(NONE), val() {}
|
|
FMT_CONSTEXPR explicit arg_ref(unsigned index) : kind(INDEX), val(index) {}
|
|
FMT_CONSTEXPR explicit arg_ref(string_view_metadata name)
|
|
: kind(NAME), val(name) {}
|
|
|
|
FMT_CONSTEXPR arg_ref& operator=(unsigned idx) {
|
|
kind = INDEX;
|
|
val.index = idx;
|
|
return *this;
|
|
}
|
|
|
|
Kind kind;
|
|
FMT_UNRESTRICTED_UNION value {
|
|
FMT_CONSTEXPR value() : index(0u) {}
|
|
FMT_CONSTEXPR value(unsigned id) : index(id) {}
|
|
FMT_CONSTEXPR value(string_view_metadata n) : name(n) {}
|
|
|
|
unsigned index;
|
|
string_view_metadata name;
|
|
}
|
|
val;
|
|
};
|
|
|
|
// Format specifiers with width and precision resolved at formatting rather
|
|
// than parsing time to allow re-using the same parsed specifiers with
|
|
// different sets of arguments (precompilation of format strings).
|
|
template <typename Char>
|
|
struct dynamic_format_specs : basic_format_specs<Char> {
|
|
arg_ref<Char> width_ref;
|
|
arg_ref<Char> precision_ref;
|
|
};
|
|
|
|
// Format spec handler that saves references to arguments representing dynamic
|
|
// width and precision to be resolved at formatting time.
|
|
template <typename ParseContext>
|
|
class dynamic_specs_handler
|
|
: public specs_setter<typename ParseContext::char_type> {
|
|
public:
|
|
typedef typename ParseContext::char_type char_type;
|
|
|
|
FMT_CONSTEXPR dynamic_specs_handler(dynamic_format_specs<char_type>& specs,
|
|
ParseContext& ctx)
|
|
: specs_setter<char_type>(specs), specs_(specs), context_(ctx) {}
|
|
|
|
FMT_CONSTEXPR dynamic_specs_handler(const dynamic_specs_handler& other)
|
|
: specs_setter<char_type>(other),
|
|
specs_(other.specs_),
|
|
context_(other.context_) {}
|
|
|
|
template <typename Id> FMT_CONSTEXPR void on_dynamic_width(Id arg_id) {
|
|
specs_.width_ref = make_arg_ref(arg_id);
|
|
}
|
|
|
|
template <typename Id> FMT_CONSTEXPR void on_dynamic_precision(Id arg_id) {
|
|
specs_.precision_ref = make_arg_ref(arg_id);
|
|
}
|
|
|
|
FMT_CONSTEXPR void on_error(const char* message) {
|
|
context_.on_error(message);
|
|
}
|
|
|
|
private:
|
|
typedef arg_ref<char_type> arg_ref_type;
|
|
|
|
FMT_CONSTEXPR arg_ref_type make_arg_ref(unsigned arg_id) {
|
|
context_.check_arg_id(arg_id);
|
|
return arg_ref_type(arg_id);
|
|
}
|
|
|
|
FMT_CONSTEXPR arg_ref_type make_arg_ref(auto_id) {
|
|
return arg_ref_type(context_.next_arg_id());
|
|
}
|
|
|
|
FMT_CONSTEXPR arg_ref_type make_arg_ref(basic_string_view<char_type> arg_id) {
|
|
context_.check_arg_id(arg_id);
|
|
basic_string_view<char_type> format_str(context_.begin(),
|
|
context_.end() - context_.begin());
|
|
const auto id_metadata = string_view_metadata(format_str, arg_id);
|
|
return arg_ref_type(id_metadata);
|
|
}
|
|
|
|
dynamic_format_specs<char_type>& specs_;
|
|
ParseContext& context_;
|
|
};
|
|
|
|
template <typename Char, typename IDHandler>
|
|
FMT_CONSTEXPR const Char* parse_arg_id(const Char* begin, const Char* end,
|
|
IDHandler&& handler) {
|
|
assert(begin != end);
|
|
Char c = *begin;
|
|
if (c == '}' || c == ':') return handler(), begin;
|
|
if (c >= '0' && c <= '9') {
|
|
unsigned index = parse_nonnegative_int(begin, end, handler);
|
|
if (begin == end || (*begin != '}' && *begin != ':'))
|
|
return handler.on_error("invalid format string"), begin;
|
|
handler(index);
|
|
return begin;
|
|
}
|
|
if (!is_name_start(c))
|
|
return handler.on_error("invalid format string"), begin;
|
|
auto it = begin;
|
|
do {
|
|
++it;
|
|
} while (it != end && (is_name_start(c = *it) || ('0' <= c && c <= '9')));
|
|
handler(basic_string_view<Char>(begin, to_unsigned(it - begin)));
|
|
return it;
|
|
}
|
|
|
|
// Adapts SpecHandler to IDHandler API for dynamic width.
|
|
template <typename SpecHandler, typename Char> struct width_adapter {
|
|
explicit FMT_CONSTEXPR width_adapter(SpecHandler& h) : handler(h) {}
|
|
|
|
FMT_CONSTEXPR void operator()() { handler.on_dynamic_width(auto_id()); }
|
|
FMT_CONSTEXPR void operator()(unsigned id) { handler.on_dynamic_width(id); }
|
|
FMT_CONSTEXPR void operator()(basic_string_view<Char> id) {
|
|
handler.on_dynamic_width(id);
|
|
}
|
|
|
|
FMT_CONSTEXPR void on_error(const char* message) {
|
|
handler.on_error(message);
|
|
}
|
|
|
|
SpecHandler& handler;
|
|
};
|
|
|
|
// Adapts SpecHandler to IDHandler API for dynamic precision.
|
|
template <typename SpecHandler, typename Char> struct precision_adapter {
|
|
explicit FMT_CONSTEXPR precision_adapter(SpecHandler& h) : handler(h) {}
|
|
|
|
FMT_CONSTEXPR void operator()() { handler.on_dynamic_precision(auto_id()); }
|
|
FMT_CONSTEXPR void operator()(unsigned id) {
|
|
handler.on_dynamic_precision(id);
|
|
}
|
|
FMT_CONSTEXPR void operator()(basic_string_view<Char> id) {
|
|
handler.on_dynamic_precision(id);
|
|
}
|
|
|
|
FMT_CONSTEXPR void on_error(const char* message) {
|
|
handler.on_error(message);
|
|
}
|
|
|
|
SpecHandler& handler;
|
|
};
|
|
|
|
// Parses fill and alignment.
|
|
template <typename Char, typename Handler>
|
|
FMT_CONSTEXPR const Char* parse_align(const Char* begin, const Char* end,
|
|
Handler&& handler) {
|
|
FMT_ASSERT(begin != end, "");
|
|
alignment align = ALIGN_DEFAULT;
|
|
int i = 0;
|
|
if (begin + 1 != end) ++i;
|
|
do {
|
|
switch (static_cast<char>(begin[i])) {
|
|
case '<':
|
|
align = ALIGN_LEFT;
|
|
break;
|
|
case '>':
|
|
align = ALIGN_RIGHT;
|
|
break;
|
|
case '=':
|
|
align = ALIGN_NUMERIC;
|
|
break;
|
|
case '^':
|
|
align = ALIGN_CENTER;
|
|
break;
|
|
}
|
|
if (align != ALIGN_DEFAULT) {
|
|
if (i > 0) {
|
|
auto c = *begin;
|
|
if (c == '{')
|
|
return handler.on_error("invalid fill character '{'"), begin;
|
|
begin += 2;
|
|
handler.on_fill(c);
|
|
} else
|
|
++begin;
|
|
handler.on_align(align);
|
|
break;
|
|
}
|
|
} while (i-- > 0);
|
|
return begin;
|
|
}
|
|
|
|
template <typename Char, typename Handler>
|
|
FMT_CONSTEXPR const Char* parse_width(const Char* begin, const Char* end,
|
|
Handler&& handler) {
|
|
FMT_ASSERT(begin != end, "");
|
|
if ('0' <= *begin && *begin <= '9') {
|
|
handler.on_width(parse_nonnegative_int(begin, end, handler));
|
|
} else if (*begin == '{') {
|
|
++begin;
|
|
if (begin != end)
|
|
begin = parse_arg_id(begin, end, width_adapter<Handler, Char>(handler));
|
|
if (begin == end || *begin != '}')
|
|
return handler.on_error("invalid format string"), begin;
|
|
++begin;
|
|
}
|
|
return begin;
|
|
}
|
|
|
|
template <typename Char, typename Handler>
|
|
FMT_CONSTEXPR const Char* parse_precision(const Char* begin, const Char* end,
|
|
Handler&& handler) {
|
|
++begin;
|
|
auto c = begin != end ? *begin : Char();
|
|
if ('0' <= c && c <= '9') {
|
|
handler.on_precision(parse_nonnegative_int(begin, end, handler));
|
|
} else if (c == '{') {
|
|
++begin;
|
|
if (begin != end) {
|
|
begin =
|
|
parse_arg_id(begin, end, precision_adapter<Handler, Char>(handler));
|
|
}
|
|
if (begin == end || *begin++ != '}')
|
|
return handler.on_error("invalid format string"), begin;
|
|
} else {
|
|
return handler.on_error("missing precision specifier"), begin;
|
|
}
|
|
handler.end_precision();
|
|
return begin;
|
|
}
|
|
|
|
// Parses standard format specifiers and sends notifications about parsed
|
|
// components to handler.
|
|
template <typename Char, typename SpecHandler>
|
|
FMT_CONSTEXPR const Char* parse_format_specs(const Char* begin, const Char* end,
|
|
SpecHandler&& handler) {
|
|
if (begin == end || *begin == '}') return begin;
|
|
|
|
begin = parse_align(begin, end, handler);
|
|
if (begin == end) return begin;
|
|
|
|
// Parse sign.
|
|
switch (static_cast<char>(*begin)) {
|
|
case '+':
|
|
handler.on_plus();
|
|
++begin;
|
|
break;
|
|
case '-':
|
|
handler.on_minus();
|
|
++begin;
|
|
break;
|
|
case ' ':
|
|
handler.on_space();
|
|
++begin;
|
|
break;
|
|
}
|
|
if (begin == end) return begin;
|
|
|
|
if (*begin == '#') {
|
|
handler.on_hash();
|
|
if (++begin == end) return begin;
|
|
}
|
|
|
|
// Parse zero flag.
|
|
if (*begin == '0') {
|
|
handler.on_zero();
|
|
if (++begin == end) return begin;
|
|
}
|
|
|
|
begin = parse_width(begin, end, handler);
|
|
if (begin == end) return begin;
|
|
|
|
// Parse precision.
|
|
if (*begin == '.') {
|
|
begin = parse_precision(begin, end, handler);
|
|
}
|
|
|
|
// Parse type.
|
|
if (begin != end && *begin != '}') handler.on_type(*begin++);
|
|
return begin;
|
|
}
|
|
|
|
// Return the result via the out param to workaround gcc bug 77539.
|
|
template <bool IS_CONSTEXPR, typename T, typename Ptr = const T*>
|
|
FMT_CONSTEXPR bool find(Ptr first, Ptr last, T value, Ptr& out) {
|
|
for (out = first; out != last; ++out) {
|
|
if (*out == value) return true;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
template <>
|
|
inline bool find<false, char>(const char* first, const char* last, char value,
|
|
const char*& out) {
|
|
out = static_cast<const char*>(
|
|
std::memchr(first, value, internal::to_unsigned(last - first)));
|
|
return out != nullptr;
|
|
}
|
|
|
|
template <typename Handler, typename Char> struct id_adapter {
|
|
FMT_CONSTEXPR void operator()() { handler.on_arg_id(); }
|
|
FMT_CONSTEXPR void operator()(unsigned id) { handler.on_arg_id(id); }
|
|
FMT_CONSTEXPR void operator()(basic_string_view<Char> id) {
|
|
handler.on_arg_id(id);
|
|
}
|
|
FMT_CONSTEXPR void on_error(const char* message) {
|
|
handler.on_error(message);
|
|
}
|
|
Handler& handler;
|
|
};
|
|
|
|
template <bool IS_CONSTEXPR, typename Char, typename Handler>
|
|
FMT_CONSTEXPR void parse_format_string(basic_string_view<Char> format_str,
|
|
Handler&& handler) {
|
|
struct writer {
|
|
FMT_CONSTEXPR void operator()(const Char* begin, const Char* end) {
|
|
if (begin == end) return;
|
|
for (;;) {
|
|
const Char* p = nullptr;
|
|
if (!find<IS_CONSTEXPR>(begin, end, '}', p))
|
|
return handler_.on_text(begin, end);
|
|
++p;
|
|
if (p == end || *p != '}')
|
|
return handler_.on_error("unmatched '}' in format string");
|
|
handler_.on_text(begin, p);
|
|
begin = p + 1;
|
|
}
|
|
}
|
|
Handler& handler_;
|
|
} write{handler};
|
|
auto begin = format_str.data();
|
|
auto end = begin + format_str.size();
|
|
while (begin != end) {
|
|
// Doing two passes with memchr (one for '{' and another for '}') is up to
|
|
// 2.5x faster than the naive one-pass implementation on big format strings.
|
|
const Char* p = begin;
|
|
if (*begin != '{' && !find<IS_CONSTEXPR>(begin, end, '{', p))
|
|
return write(begin, end);
|
|
write(begin, p);
|
|
++p;
|
|
if (p == end) return handler.on_error("invalid format string");
|
|
if (static_cast<char>(*p) == '}') {
|
|
handler.on_arg_id();
|
|
handler.on_replacement_field(p);
|
|
} else if (*p == '{') {
|
|
handler.on_text(p, p + 1);
|
|
} else {
|
|
p = parse_arg_id(p, end, id_adapter<Handler, Char>{handler});
|
|
Char c = p != end ? *p : Char();
|
|
if (c == '}') {
|
|
handler.on_replacement_field(p);
|
|
} else if (c == ':') {
|
|
p = handler.on_format_specs(p + 1, end);
|
|
if (p == end || *p != '}')
|
|
return handler.on_error("unknown format specifier");
|
|
} else {
|
|
return handler.on_error("missing '}' in format string");
|
|
}
|
|
}
|
|
begin = p + 1;
|
|
}
|
|
}
|
|
|
|
template <typename T, typename ParseContext>
|
|
FMT_CONSTEXPR const typename ParseContext::char_type* parse_format_specs(
|
|
ParseContext& ctx) {
|
|
// GCC 7.2 requires initializer.
|
|
typedef typename ParseContext::char_type char_type;
|
|
conditional_t<has_formatter<T, buffer_context<char_type>>::value,
|
|
formatter<T, char_type>,
|
|
internal::fallback_formatter<T, char_type>>
|
|
f;
|
|
return f.parse(ctx);
|
|
}
|
|
|
|
template <typename Char, typename ErrorHandler, typename... Args>
|
|
class format_string_checker {
|
|
public:
|
|
explicit FMT_CONSTEXPR format_string_checker(
|
|
basic_string_view<Char> format_str, ErrorHandler eh)
|
|
: arg_id_((std::numeric_limits<unsigned>::max)()),
|
|
context_(format_str, eh),
|
|
parse_funcs_{&parse_format_specs<Args, parse_context_type>...} {}
|
|
|
|
FMT_CONSTEXPR void on_text(const Char*, const Char*) {}
|
|
|
|
FMT_CONSTEXPR void on_arg_id() {
|
|
arg_id_ = context_.next_arg_id();
|
|
check_arg_id();
|
|
}
|
|
FMT_CONSTEXPR void on_arg_id(unsigned id) {
|
|
arg_id_ = id;
|
|
context_.check_arg_id(id);
|
|
check_arg_id();
|
|
}
|
|
FMT_CONSTEXPR void on_arg_id(basic_string_view<Char>) {
|
|
on_error("compile-time checks don't support named arguments");
|
|
}
|
|
|
|
FMT_CONSTEXPR void on_replacement_field(const Char*) {}
|
|
|
|
FMT_CONSTEXPR const Char* on_format_specs(const Char* begin, const Char*) {
|
|
advance_to(context_, begin);
|
|
return arg_id_ < NUM_ARGS ? parse_funcs_[arg_id_](context_) : begin;
|
|
}
|
|
|
|
FMT_CONSTEXPR void on_error(const char* message) {
|
|
context_.on_error(message);
|
|
}
|
|
|
|
private:
|
|
typedef basic_parse_context<Char, ErrorHandler> parse_context_type;
|
|
enum { NUM_ARGS = sizeof...(Args) };
|
|
|
|
FMT_CONSTEXPR void check_arg_id() {
|
|
if (arg_id_ >= NUM_ARGS) context_.on_error("argument index out of range");
|
|
}
|
|
|
|
// Format specifier parsing function.
|
|
typedef const Char* (*parse_func)(parse_context_type&);
|
|
|
|
unsigned arg_id_;
|
|
parse_context_type context_;
|
|
parse_func parse_funcs_[NUM_ARGS > 0 ? NUM_ARGS : 1];
|
|
};
|
|
|
|
template <typename Char, typename ErrorHandler, typename... Args>
|
|
FMT_CONSTEXPR bool do_check_format_string(basic_string_view<Char> s,
|
|
ErrorHandler eh = ErrorHandler()) {
|
|
format_string_checker<Char, ErrorHandler, Args...> checker(s, eh);
|
|
parse_format_string<true>(s, checker);
|
|
return true;
|
|
}
|
|
|
|
template <typename... Args, typename S,
|
|
enable_if_t<(is_compile_string<S>::value), int>>
|
|
void check_format_string(S format_str) {
|
|
typedef typename S::char_type char_t;
|
|
FMT_CONSTEXPR_DECL bool invalid_format =
|
|
internal::do_check_format_string<char_t, internal::error_handler,
|
|
Args...>(to_string_view(format_str));
|
|
(void)invalid_format;
|
|
}
|
|
|
|
template <template <typename> class Handler, typename Spec, typename Context>
|
|
void handle_dynamic_spec(Spec& value, arg_ref<typename Context::char_type> ref,
|
|
Context& ctx,
|
|
const typename Context::char_type* format_str) {
|
|
typedef typename Context::char_type char_type;
|
|
switch (ref.kind) {
|
|
case arg_ref<char_type>::NONE:
|
|
break;
|
|
case arg_ref<char_type>::INDEX:
|
|
internal::set_dynamic_spec<Handler>(value, ctx.arg(ref.val.index),
|
|
ctx.error_handler());
|
|
break;
|
|
case arg_ref<char_type>::NAME: {
|
|
const auto arg_id = ref.val.name.to_view(format_str);
|
|
internal::set_dynamic_spec<Handler>(value, ctx.arg(arg_id),
|
|
ctx.error_handler());
|
|
} break;
|
|
}
|
|
}
|
|
} // namespace internal
|
|
|
|
/** The default argument formatter. */
|
|
template <typename Range>
|
|
class arg_formatter
|
|
: public internal::function<
|
|
typename internal::arg_formatter_base<Range>::iterator>,
|
|
public internal::arg_formatter_base<Range> {
|
|
private:
|
|
typedef typename Range::value_type char_type;
|
|
typedef internal::arg_formatter_base<Range> base;
|
|
typedef basic_format_context<typename base::iterator, char_type> context_type;
|
|
|
|
context_type& ctx_;
|
|
basic_parse_context<char_type>* parse_ctx_;
|
|
|
|
public:
|
|
typedef Range range;
|
|
typedef typename base::iterator iterator;
|
|
typedef typename base::format_specs format_specs;
|
|
|
|
/**
|
|
\rst
|
|
Constructs an argument formatter object.
|
|
*ctx* is a reference to the formatting context,
|
|
*spec* contains format specifier information for standard argument types.
|
|
\endrst
|
|
*/
|
|
explicit arg_formatter(context_type& ctx,
|
|
basic_parse_context<char_type>* parse_ctx = nullptr,
|
|
format_specs* spec = nullptr)
|
|
: base(Range(ctx.out()), spec, ctx.locale()),
|
|
ctx_(ctx),
|
|
parse_ctx_(parse_ctx) {}
|
|
|
|
FMT_DEPRECATED arg_formatter(context_type& ctx, format_specs& spec)
|
|
: base(Range(ctx.out()), &spec), ctx_(ctx) {}
|
|
|
|
using base::operator();
|
|
|
|
/** Formats an argument of a user-defined type. */
|
|
iterator operator()(typename basic_format_arg<context_type>::handle handle) {
|
|
handle.format(*parse_ctx_, ctx_);
|
|
return this->out();
|
|
}
|
|
};
|
|
|
|
/**
|
|
An error returned by an operating system or a language runtime,
|
|
for example a file opening error.
|
|
*/
|
|
class system_error : public std::runtime_error {
|
|
private:
|
|
FMT_API void init(int err_code, string_view format_str, format_args args);
|
|
|
|
protected:
|
|
int error_code_;
|
|
|
|
system_error() : std::runtime_error("") {}
|
|
|
|
public:
|
|
/**
|
|
\rst
|
|
Constructs a :class:`fmt::system_error` 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 system_error 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::system_error(errno, "cannot open file '{}'", filename);
|
|
\endrst
|
|
*/
|
|
template <typename... Args>
|
|
system_error(int error_code, string_view message, const Args&... args)
|
|
: std::runtime_error("") {
|
|
init(error_code, message, make_format_args(args...));
|
|
}
|
|
|
|
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(internal::buffer<char>& out, int error_code,
|
|
fmt::string_view message) FMT_NOEXCEPT;
|
|
|
|
/**
|
|
This template provides operations for formatting and writing data into a
|
|
character range.
|
|
*/
|
|
template <typename Range> class basic_writer {
|
|
public:
|
|
typedef typename Range::value_type char_type;
|
|
typedef decltype(std::declval<Range>().begin()) iterator;
|
|
typedef basic_format_specs<char_type> format_specs;
|
|
|
|
private:
|
|
iterator out_; // Output iterator.
|
|
internal::locale_ref locale_;
|
|
|
|
// Attempts to reserve space for n extra characters in the output range.
|
|
// Returns a pointer to the reserved range or a reference to out_.
|
|
auto reserve(std::size_t n) -> decltype(internal::reserve(out_, n)) {
|
|
return internal::reserve(out_, n);
|
|
}
|
|
|
|
// Writes a value in the format
|
|
// <left-padding><value><right-padding>
|
|
// where <value> is written by f(it).
|
|
template <typename F> void write_padded(const align_spec& spec, F&& f) {
|
|
unsigned width = spec.width(); // User-perceived width (in code points).
|
|
size_t size = f.size(); // The number of code units.
|
|
size_t num_code_points = width != 0 ? f.width() : size;
|
|
if (width <= num_code_points) return f(reserve(size));
|
|
auto&& it = reserve(width + (size - num_code_points));
|
|
char_type fill = static_cast<char_type>(spec.fill());
|
|
std::size_t padding = width - num_code_points;
|
|
if (spec.align() == ALIGN_RIGHT) {
|
|
it = std::fill_n(it, padding, fill);
|
|
f(it);
|
|
} else if (spec.align() == ALIGN_CENTER) {
|
|
std::size_t left_padding = padding / 2;
|
|
it = std::fill_n(it, left_padding, fill);
|
|
f(it);
|
|
it = std::fill_n(it, padding - left_padding, fill);
|
|
} else {
|
|
f(it);
|
|
it = std::fill_n(it, padding, fill);
|
|
}
|
|
}
|
|
|
|
template <typename F> struct padded_int_writer {
|
|
size_t size_;
|
|
string_view prefix;
|
|
char_type fill;
|
|
std::size_t padding;
|
|
F f;
|
|
|
|
size_t size() const { return size_; }
|
|
size_t width() const { return size_; }
|
|
|
|
template <typename It> void operator()(It&& it) const {
|
|
if (prefix.size() != 0)
|
|
it = internal::copy_str<char_type>(prefix.begin(), prefix.end(), it);
|
|
it = std::fill_n(it, padding, fill);
|
|
f(it);
|
|
}
|
|
};
|
|
|
|
// Writes an integer in the format
|
|
// <left-padding><prefix><numeric-padding><digits><right-padding>
|
|
// where <digits> are written by f(it).
|
|
template <typename Spec, typename F>
|
|
void write_int(int num_digits, string_view prefix, const Spec& spec, F f) {
|
|
std::size_t size = prefix.size() + internal::to_unsigned(num_digits);
|
|
char_type fill = static_cast<char_type>(spec.fill());
|
|
std::size_t padding = 0;
|
|
if (spec.align() == ALIGN_NUMERIC) {
|
|
if (spec.width() > size) {
|
|
padding = spec.width() - size;
|
|
size = spec.width();
|
|
}
|
|
} else if (spec.precision > num_digits) {
|
|
size = prefix.size() + internal::to_unsigned(spec.precision);
|
|
padding = internal::to_unsigned(spec.precision - num_digits);
|
|
fill = static_cast<char_type>('0');
|
|
}
|
|
align_spec as = spec;
|
|
if (spec.align() == ALIGN_DEFAULT) as.align_ = ALIGN_RIGHT;
|
|
write_padded(as, padded_int_writer<F>{size, prefix, fill, padding, f});
|
|
}
|
|
|
|
// Writes a decimal integer.
|
|
template <typename Int> void write_decimal(Int value) {
|
|
typedef typename internal::int_traits<Int>::main_type main_type;
|
|
main_type abs_value = static_cast<main_type>(value);
|
|
bool is_negative = internal::is_negative(value);
|
|
if (is_negative) abs_value = 0 - abs_value;
|
|
int num_digits = internal::count_digits(abs_value);
|
|
auto&& it =
|
|
reserve((is_negative ? 1 : 0) + static_cast<size_t>(num_digits));
|
|
if (is_negative) *it++ = static_cast<char_type>('-');
|
|
it = internal::format_decimal<char_type>(it, abs_value, num_digits);
|
|
}
|
|
|
|
// The handle_int_type_spec handler that writes an integer.
|
|
template <typename Int, typename Spec> struct int_writer {
|
|
typedef typename internal::int_traits<Int>::main_type unsigned_type;
|
|
|
|
basic_writer<Range>& writer;
|
|
const Spec& spec;
|
|
unsigned_type abs_value;
|
|
char prefix[4];
|
|
unsigned prefix_size;
|
|
|
|
string_view get_prefix() const { return string_view(prefix, prefix_size); }
|
|
|
|
int_writer(basic_writer<Range>& w, Int value, const Spec& s)
|
|
: writer(w),
|
|
spec(s),
|
|
abs_value(static_cast<unsigned_type>(value)),
|
|
prefix_size(0) {
|
|
if (internal::is_negative(value)) {
|
|
prefix[0] = '-';
|
|
++prefix_size;
|
|
abs_value = 0 - abs_value;
|
|
} else if (spec.has(SIGN_FLAG)) {
|
|
prefix[0] = spec.has(PLUS_FLAG) ? '+' : ' ';
|
|
++prefix_size;
|
|
}
|
|
}
|
|
|
|
struct dec_writer {
|
|
unsigned_type abs_value;
|
|
int num_digits;
|
|
|
|
template <typename It> void operator()(It&& it) const {
|
|
it = internal::format_decimal<char_type>(it, abs_value, num_digits);
|
|
}
|
|
};
|
|
|
|
void on_dec() {
|
|
int num_digits = internal::count_digits(abs_value);
|
|
writer.write_int(num_digits, get_prefix(), spec,
|
|
dec_writer{abs_value, num_digits});
|
|
}
|
|
|
|
struct hex_writer {
|
|
int_writer& self;
|
|
int num_digits;
|
|
|
|
template <typename It> void operator()(It&& it) const {
|
|
it = internal::format_uint<4, char_type>(it, self.abs_value, num_digits,
|
|
self.spec.type != 'x');
|
|
}
|
|
};
|
|
|
|
void on_hex() {
|
|
if (spec.has(HASH_FLAG)) {
|
|
prefix[prefix_size++] = '0';
|
|
prefix[prefix_size++] = static_cast<char>(spec.type);
|
|
}
|
|
int num_digits = internal::count_digits<4>(abs_value);
|
|
writer.write_int(num_digits, get_prefix(), spec,
|
|
hex_writer{*this, num_digits});
|
|
}
|
|
|
|
template <int BITS> struct bin_writer {
|
|
unsigned_type abs_value;
|
|
int num_digits;
|
|
|
|
template <typename It> void operator()(It&& it) const {
|
|
it = internal::format_uint<BITS, char_type>(it, abs_value, num_digits);
|
|
}
|
|
};
|
|
|
|
void on_bin() {
|
|
if (spec.has(HASH_FLAG)) {
|
|
prefix[prefix_size++] = '0';
|
|
prefix[prefix_size++] = static_cast<char>(spec.type);
|
|
}
|
|
int num_digits = internal::count_digits<1>(abs_value);
|
|
writer.write_int(num_digits, get_prefix(), spec,
|
|
bin_writer<1>{abs_value, num_digits});
|
|
}
|
|
|
|
void on_oct() {
|
|
int num_digits = internal::count_digits<3>(abs_value);
|
|
if (spec.has(HASH_FLAG) && spec.precision <= num_digits) {
|
|
// Octal prefix '0' is counted as a digit, so only add it if precision
|
|
// is not greater than the number of digits.
|
|
prefix[prefix_size++] = '0';
|
|
}
|
|
writer.write_int(num_digits, get_prefix(), spec,
|
|
bin_writer<3>{abs_value, num_digits});
|
|
}
|
|
|
|
enum { SEP_SIZE = 1 };
|
|
|
|
struct num_writer {
|
|
unsigned_type abs_value;
|
|
int size;
|
|
char_type sep;
|
|
|
|
template <typename It> void operator()(It&& it) const {
|
|
basic_string_view<char_type> s(&sep, SEP_SIZE);
|
|
it = internal::format_decimal<char_type>(
|
|
it, abs_value, size, internal::add_thousands_sep<char_type>(s));
|
|
}
|
|
};
|
|
|
|
void on_num() {
|
|
int num_digits = internal::count_digits(abs_value);
|
|
char_type sep = internal::thousands_sep<char_type>(writer.locale_);
|
|
int size = num_digits + SEP_SIZE * ((num_digits - 1) / 3);
|
|
writer.write_int(size, get_prefix(), spec,
|
|
num_writer{abs_value, size, sep});
|
|
}
|
|
|
|
FMT_NORETURN void on_error() {
|
|
FMT_THROW(format_error("invalid type specifier"));
|
|
}
|
|
};
|
|
|
|
// Writes a formatted integer.
|
|
template <typename T, typename Spec>
|
|
void write_int(T value, const Spec& spec) {
|
|
internal::handle_int_type_spec(spec.type,
|
|
int_writer<T, Spec>(*this, value, spec));
|
|
}
|
|
|
|
enum { INF_SIZE = 3 }; // This is an enum to workaround a bug in MSVC.
|
|
|
|
struct inf_or_nan_writer {
|
|
char sign;
|
|
bool as_percentage;
|
|
const char* str;
|
|
|
|
size_t size() const {
|
|
return static_cast<std::size_t>(INF_SIZE + (sign ? 1 : 0) +
|
|
(as_percentage ? 1 : 0));
|
|
}
|
|
size_t width() const { return size(); }
|
|
|
|
template <typename It> void operator()(It&& it) const {
|
|
if (sign) *it++ = static_cast<char_type>(sign);
|
|
it = internal::copy_str<char_type>(
|
|
str, str + static_cast<std::size_t>(INF_SIZE), it);
|
|
if (as_percentage) *it++ = static_cast<char_type>('%');
|
|
}
|
|
};
|
|
|
|
struct double_writer {
|
|
char sign;
|
|
internal::buffer<char>& buffer;
|
|
|
|
size_t size() const { return buffer.size() + (sign ? 1 : 0); }
|
|
size_t width() const { return size(); }
|
|
|
|
template <typename It> void operator()(It&& it) {
|
|
if (sign) *it++ = static_cast<char_type>(sign);
|
|
it = internal::copy_str<char_type>(buffer.begin(), buffer.end(), it);
|
|
}
|
|
};
|
|
|
|
class grisu_writer {
|
|
private:
|
|
internal::buffer<char>& digits_;
|
|
size_t size_;
|
|
char sign_;
|
|
int exp_;
|
|
internal::gen_digits_params params_;
|
|
|
|
public:
|
|
grisu_writer(char sign, internal::buffer<char>& digits, int exp,
|
|
const internal::gen_digits_params& params)
|
|
: digits_(digits), sign_(sign), exp_(exp), params_(params) {
|
|
int num_digits = static_cast<int>(digits.size());
|
|
int full_exp = num_digits + exp - 1;
|
|
int precision = params.num_digits > 0 ? params.num_digits : 11;
|
|
params_.fixed |= full_exp >= -4 && full_exp < precision;
|
|
auto it = internal::grisu_prettify<char>(
|
|
digits.data(), num_digits, exp, internal::counting_iterator<char>(),
|
|
params_);
|
|
size_ = it.count();
|
|
}
|
|
|
|
size_t size() const { return size_ + (sign_ ? 1 : 0); }
|
|
size_t width() const { return size(); }
|
|
|
|
template <typename It> void operator()(It&& it) {
|
|
if (sign_) *it++ = static_cast<char_type>(sign_);
|
|
int num_digits = static_cast<int>(digits_.size());
|
|
it = internal::grisu_prettify<char_type>(digits_.data(), num_digits, exp_,
|
|
it, params_);
|
|
}
|
|
};
|
|
|
|
// Formats a floating-point number (double or long double).
|
|
template <typename T> void write_double(T value, const format_specs& spec);
|
|
|
|
template <typename Char> struct str_writer {
|
|
const Char* s;
|
|
size_t size_;
|
|
|
|
size_t size() const { return size_; }
|
|
size_t width() const {
|
|
return internal::count_code_points(basic_string_view<Char>(s, size_));
|
|
}
|
|
|
|
template <typename It> void operator()(It&& it) const {
|
|
it = internal::copy_str<char_type>(s, s + size_, it);
|
|
}
|
|
};
|
|
|
|
template <typename UIntPtr> struct pointer_writer {
|
|
UIntPtr value;
|
|
int num_digits;
|
|
|
|
size_t size() const { return num_digits + 2; }
|
|
size_t width() const { return size(); }
|
|
|
|
template <typename It> void operator()(It&& it) const {
|
|
*it++ = static_cast<char_type>('0');
|
|
*it++ = static_cast<char_type>('x');
|
|
it = internal::format_uint<4, char_type>(it, value, num_digits);
|
|
}
|
|
};
|
|
|
|
template <typename Char, typename ErrorHandler>
|
|
friend class internal::arg_formatter_base;
|
|
|
|
public:
|
|
/** Constructs a ``basic_writer`` object. */
|
|
explicit basic_writer(Range out,
|
|
internal::locale_ref loc = internal::locale_ref())
|
|
: out_(out.begin()), locale_(loc) {}
|
|
|
|
iterator out() const { return out_; }
|
|
|
|
void write(int value) { write_decimal(value); }
|
|
void write(long value) { write_decimal(value); }
|
|
void write(long long value) { write_decimal(value); }
|
|
|
|
void write(unsigned value) { write_decimal(value); }
|
|
void write(unsigned long value) { write_decimal(value); }
|
|
void write(unsigned long long value) { write_decimal(value); }
|
|
|
|
/**
|
|
\rst
|
|
Formats *value* and writes it to the buffer.
|
|
\endrst
|
|
*/
|
|
template <typename T, typename FormatSpec, typename... FormatSpecs,
|
|
FMT_ENABLE_IF(std::is_integral<T>::value)>
|
|
void write(T value, FormatSpec spec, FormatSpecs... specs) {
|
|
format_specs s(spec, specs...);
|
|
s.align_ = ALIGN_RIGHT;
|
|
write_int(value, s);
|
|
}
|
|
|
|
void write(double value, const format_specs& spec = format_specs()) {
|
|
write_double(value, spec);
|
|
}
|
|
|
|
/**
|
|
\rst
|
|
Formats *value* using the general format for floating-point numbers
|
|
(``'g'``) and writes it to the buffer.
|
|
\endrst
|
|
*/
|
|
void write(long double value, const format_specs& spec = format_specs()) {
|
|
write_double(value, spec);
|
|
}
|
|
|
|
/** Writes a character to the buffer. */
|
|
void write(char value) {
|
|
auto&& it = reserve(1);
|
|
*it++ = value;
|
|
}
|
|
|
|
template <typename Char, FMT_ENABLE_IF(std::is_same<Char, char_type>::value)>
|
|
void write(Char value) {
|
|
auto&& it = reserve(1);
|
|
*it++ = value;
|
|
}
|
|
|
|
/**
|
|
\rst
|
|
Writes *value* to the buffer.
|
|
\endrst
|
|
*/
|
|
void write(string_view value) {
|
|
auto&& it = reserve(value.size());
|
|
it = internal::copy_str<char_type>(value.begin(), value.end(), it);
|
|
}
|
|
void write(wstring_view value) {
|
|
static_assert(std::is_same<char_type, wchar_t>::value, "");
|
|
auto&& it = reserve(value.size());
|
|
it = std::copy(value.begin(), value.end(), it);
|
|
}
|
|
|
|
// Writes a formatted string.
|
|
template <typename Char>
|
|
void write(const Char* s, std::size_t size, const align_spec& spec) {
|
|
write_padded(spec, str_writer<Char>{s, size});
|
|
}
|
|
|
|
template <typename Char>
|
|
void write(basic_string_view<Char> s,
|
|
const format_specs& spec = format_specs()) {
|
|
const Char* data = s.data();
|
|
std::size_t size = s.size();
|
|
if (spec.precision >= 0 && internal::to_unsigned(spec.precision) < size)
|
|
size = internal::to_unsigned(spec.precision);
|
|
write(data, size, spec);
|
|
}
|
|
|
|
template <typename UIntPtr>
|
|
void write_pointer(UIntPtr value, const align_spec* spec) {
|
|
int num_digits = internal::count_digits<4>(value);
|
|
auto pw = pointer_writer<UIntPtr>{value, num_digits};
|
|
if (!spec) return pw(reserve(num_digits + 2));
|
|
align_spec as = *spec;
|
|
if (as.align() == ALIGN_DEFAULT) as.align_ = ALIGN_RIGHT;
|
|
write_padded(as, pw);
|
|
}
|
|
};
|
|
|
|
struct float_spec_handler {
|
|
char type;
|
|
bool upper;
|
|
bool fixed;
|
|
bool as_percentage;
|
|
|
|
explicit float_spec_handler(char t)
|
|
: type(t), upper(false), fixed(false), as_percentage(false) {}
|
|
|
|
void on_general() {
|
|
if (type == 'G') upper = true;
|
|
}
|
|
|
|
void on_exp() {
|
|
if (type == 'E') upper = true;
|
|
}
|
|
|
|
void on_fixed() {
|
|
fixed = true;
|
|
if (type == 'F') upper = true;
|
|
}
|
|
|
|
void on_percent() {
|
|
fixed = true;
|
|
as_percentage = true;
|
|
}
|
|
|
|
void on_hex() {
|
|
if (type == 'A') upper = true;
|
|
}
|
|
|
|
FMT_NORETURN void on_error() {
|
|
FMT_THROW(format_error("invalid type specifier"));
|
|
}
|
|
};
|
|
|
|
template <typename Range>
|
|
template <typename T>
|
|
void basic_writer<Range>::write_double(T value, const format_specs& spec) {
|
|
// Check type.
|
|
float_spec_handler handler(static_cast<char>(spec.type));
|
|
internal::handle_float_type_spec(handler.type, handler);
|
|
|
|
char sign = 0;
|
|
// Use signbit instead of value < 0 since the latter is always false for NaN.
|
|
if (std::signbit(value)) {
|
|
sign = '-';
|
|
value = -value;
|
|
} else if (spec.has(SIGN_FLAG)) {
|
|
sign = spec.has(PLUS_FLAG) ? '+' : ' ';
|
|
}
|
|
|
|
if (!std::isfinite(value)) {
|
|
// Format infinity and NaN ourselves because sprintf's output is not
|
|
// consistent across platforms.
|
|
const char* str = std::isinf(value) ? (handler.upper ? "INF" : "inf")
|
|
: (handler.upper ? "NAN" : "nan");
|
|
return write_padded(spec,
|
|
inf_or_nan_writer{sign, handler.as_percentage, str});
|
|
}
|
|
|
|
if (handler.as_percentage) value *= 100;
|
|
|
|
memory_buffer buffer;
|
|
int exp = 0;
|
|
int precision = spec.has_precision() || !spec.type ? spec.precision : 6;
|
|
unsigned options = handler.fixed ? internal::grisu_options::fixed : 0;
|
|
bool use_grisu = fmt::internal::use_grisu<T>() &&
|
|
(spec.type != 'a' && spec.type != 'A' && spec.type != 'e' &&
|
|
spec.type != 'E') &&
|
|
internal::grisu_format(static_cast<double>(value), buffer,
|
|
precision, options, exp);
|
|
if (!use_grisu) internal::sprintf_format(value, buffer, spec);
|
|
|
|
if (handler.as_percentage) {
|
|
buffer.push_back('%');
|
|
--exp; // Adjust decimal place position.
|
|
}
|
|
align_spec as = spec;
|
|
if (spec.align() == ALIGN_NUMERIC) {
|
|
if (sign) {
|
|
auto&& it = reserve(1);
|
|
*it++ = static_cast<char_type>(sign);
|
|
sign = 0;
|
|
if (as.width_) --as.width_;
|
|
}
|
|
as.align_ = ALIGN_RIGHT;
|
|
} else if (spec.align() == ALIGN_DEFAULT) {
|
|
as.align_ = ALIGN_RIGHT;
|
|
}
|
|
if (use_grisu) {
|
|
auto params = internal::gen_digits_params();
|
|
params.fixed = handler.fixed;
|
|
params.num_digits = precision;
|
|
params.trailing_zeros = (precision != 0 && (handler.fixed || !spec.type)) ||
|
|
spec.has(HASH_FLAG);
|
|
write_padded(as, grisu_writer{sign, buffer, exp, params});
|
|
} else {
|
|
write_padded(as, double_writer{sign, buffer});
|
|
}
|
|
}
|
|
|
|
// 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,
|
|
string_view message) FMT_NOEXCEPT;
|
|
|
|
#if FMT_USE_WINDOWS_H
|
|
|
|
/** A Windows error. */
|
|
class windows_error : public system_error {
|
|
private:
|
|
FMT_API void init(int error_code, string_view format_str, format_args args);
|
|
|
|
public:
|
|
/**
|
|
\rst
|
|
Constructs a :class:`fmt::windows_error` object with the description
|
|
of the form
|
|
|
|
.. parsed-literal::
|
|
*<message>*: *<system-message>*
|
|
|
|
where *<message>* is the formatted message and *<system-message>* is the
|
|
system message corresponding to the error code.
|
|
*error_code* is a Windows error code as given by ``GetLastError``.
|
|
If *error_code* is not a valid error code such as -1, the system message
|
|
will look like "error -1".
|
|
|
|
**Example**::
|
|
|
|
// This throws a windows_error with the description
|
|
// cannot open file 'madeup': The system cannot find the file specified.
|
|
// or similar (system message may vary).
|
|
const char *filename = "madeup";
|
|
LPOFSTRUCT of = LPOFSTRUCT();
|
|
HFILE file = OpenFile(filename, &of, OF_READ);
|
|
if (file == HFILE_ERROR) {
|
|
throw fmt::windows_error(GetLastError(),
|
|
"cannot open file '{}'", filename);
|
|
}
|
|
\endrst
|
|
*/
|
|
template <typename... Args>
|
|
windows_error(int error_code, string_view message, const Args&... args) {
|
|
init(error_code, message, make_format_args(args...));
|
|
}
|
|
};
|
|
|
|
// Reports a Windows error without throwing an exception.
|
|
// Can be used to report errors from destructors.
|
|
FMT_API void report_windows_error(int error_code,
|
|
string_view message) FMT_NOEXCEPT;
|
|
|
|
#endif
|
|
|
|
/** Fast integer formatter. */
|
|
class format_int {
|
|
private:
|
|
// Buffer should be large enough to hold all digits (digits10 + 1),
|
|
// a sign and a null character.
|
|
enum { BUFFER_SIZE = std::numeric_limits<unsigned long long>::digits10 + 3 };
|
|
mutable char buffer_[BUFFER_SIZE];
|
|
char* str_;
|
|
|
|
// Formats value in reverse and returns a pointer to the beginning.
|
|
char* format_decimal(unsigned long long value) {
|
|
char* ptr = buffer_ + (BUFFER_SIZE - 1); // Parens to workaround MSVC bug.
|
|
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;
|
|
*--ptr = internal::data::DIGITS[index + 1];
|
|
*--ptr = internal::data::DIGITS[index];
|
|
}
|
|
if (value < 10) {
|
|
*--ptr = static_cast<char>('0' + value);
|
|
return ptr;
|
|
}
|
|
unsigned index = static_cast<unsigned>(value * 2);
|
|
*--ptr = internal::data::DIGITS[index + 1];
|
|
*--ptr = internal::data::DIGITS[index];
|
|
return ptr;
|
|
}
|
|
|
|
void format_signed(long long value) {
|
|
unsigned long long abs_value = static_cast<unsigned long long>(value);
|
|
bool negative = value < 0;
|
|
if (negative) abs_value = 0 - abs_value;
|
|
str_ = format_decimal(abs_value);
|
|
if (negative) *--str_ = '-';
|
|
}
|
|
|
|
public:
|
|
explicit format_int(int value) { format_signed(value); }
|
|
explicit format_int(long value) { format_signed(value); }
|
|
explicit format_int(long long value) { format_signed(value); }
|
|
explicit format_int(unsigned value) : str_(format_decimal(value)) {}
|
|
explicit format_int(unsigned long value) : str_(format_decimal(value)) {}
|
|
explicit format_int(unsigned long long 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()); }
|
|
};
|
|
|
|
// A formatter specialization for the core types corresponding to internal::type
|
|
// constants.
|
|
template <typename T, typename Char>
|
|
struct formatter<T, Char,
|
|
enable_if_t<internal::type_constant<T, Char>::value !=
|
|
internal::none_type>> {
|
|
FMT_CONSTEXPR formatter() : format_str_(nullptr) {}
|
|
|
|
// Parses format specifiers stopping either at the end of the range or at the
|
|
// terminating '}'.
|
|
template <typename ParseContext>
|
|
FMT_CONSTEXPR auto parse(ParseContext& ctx) -> decltype(ctx.begin()) {
|
|
format_str_ = ctx.begin();
|
|
using handler_type = internal::dynamic_specs_handler<ParseContext>;
|
|
auto type = internal::type_constant<T, Char>::value;
|
|
internal::specs_checker<handler_type> handler(handler_type(specs_, ctx),
|
|
type);
|
|
auto it = parse_format_specs(ctx.begin(), ctx.end(), handler);
|
|
auto eh = ctx.error_handler();
|
|
switch (type) {
|
|
case internal::none_type:
|
|
case internal::named_arg_type:
|
|
FMT_ASSERT(false, "invalid argument type");
|
|
break;
|
|
case internal::int_type:
|
|
case internal::uint_type:
|
|
case internal::long_long_type:
|
|
case internal::ulong_long_type:
|
|
case internal::bool_type:
|
|
handle_int_type_spec(specs_.type,
|
|
internal::int_type_checker<decltype(eh)>(eh));
|
|
break;
|
|
case internal::char_type:
|
|
handle_char_specs(
|
|
&specs_, internal::char_specs_checker<decltype(eh)>(specs_.type, eh));
|
|
break;
|
|
case internal::double_type:
|
|
case internal::long_double_type:
|
|
handle_float_type_spec(specs_.type,
|
|
internal::float_type_checker<decltype(eh)>(eh));
|
|
break;
|
|
case internal::cstring_type:
|
|
internal::handle_cstring_type_spec(
|
|
specs_.type, internal::cstring_type_checker<decltype(eh)>(eh));
|
|
break;
|
|
case internal::string_type:
|
|
internal::check_string_type_spec(specs_.type, eh);
|
|
break;
|
|
case internal::pointer_type:
|
|
internal::check_pointer_type_spec(specs_.type, eh);
|
|
break;
|
|
case internal::custom_type:
|
|
// Custom format specifiers should be checked in parse functions of
|
|
// formatter specializations.
|
|
break;
|
|
}
|
|
return it;
|
|
}
|
|
|
|
template <typename FormatContext>
|
|
auto format(const T& val, FormatContext& ctx) -> decltype(ctx.out()) {
|
|
internal::handle_dynamic_spec<internal::width_checker>(
|
|
specs_.width_, specs_.width_ref, ctx, format_str_);
|
|
internal::handle_dynamic_spec<internal::precision_checker>(
|
|
specs_.precision, specs_.precision_ref, ctx, format_str_);
|
|
using range_type = output_range<typename FormatContext::iterator,
|
|
typename FormatContext::char_type>;
|
|
return visit_format_arg(arg_formatter<range_type>(ctx, nullptr, &specs_),
|
|
internal::make_arg<FormatContext>(val));
|
|
}
|
|
|
|
private:
|
|
internal::dynamic_format_specs<Char> specs_;
|
|
const Char* format_str_;
|
|
};
|
|
|
|
#define FMT_FORMAT_AS(Type, Base) \
|
|
template <typename Char> \
|
|
struct formatter<Type, Char> : formatter<Base, Char> { \
|
|
template <typename FormatContext> \
|
|
auto format(const Type& val, FormatContext& ctx) -> decltype(ctx.out()) { \
|
|
return formatter<Base, Char>::format(val, ctx); \
|
|
} \
|
|
}
|
|
|
|
FMT_FORMAT_AS(signed char, int);
|
|
FMT_FORMAT_AS(unsigned char, unsigned);
|
|
FMT_FORMAT_AS(short, int);
|
|
FMT_FORMAT_AS(unsigned short, unsigned);
|
|
FMT_FORMAT_AS(long, long long);
|
|
FMT_FORMAT_AS(unsigned long, unsigned long long);
|
|
FMT_FORMAT_AS(float, double);
|
|
FMT_FORMAT_AS(Char*, const Char*);
|
|
FMT_FORMAT_AS(std::basic_string<Char>, basic_string_view<Char>);
|
|
FMT_FORMAT_AS(std::nullptr_t, const void*);
|
|
|
|
template <typename Char>
|
|
struct formatter<void*, Char> : formatter<const void*, Char> {
|
|
template <typename FormatContext>
|
|
auto format(void* val, FormatContext& ctx) -> decltype(ctx.out()) {
|
|
return formatter<const void*, Char>::format(val, ctx);
|
|
}
|
|
};
|
|
|
|
template <typename Char, size_t N>
|
|
struct formatter<Char[N], Char> : formatter<basic_string_view<Char>, Char> {
|
|
template <typename FormatContext>
|
|
auto format(const Char* val, FormatContext& ctx) -> decltype(ctx.out()) {
|
|
return formatter<basic_string_view<Char>, Char>::format(val, ctx);
|
|
}
|
|
};
|
|
|
|
// A formatter for types known only at run time such as variant alternatives.
|
|
//
|
|
// Usage:
|
|
// typedef std::variant<int, std::string> variant;
|
|
// template <>
|
|
// struct formatter<variant>: dynamic_formatter<> {
|
|
// void format(buffer &buf, const variant &v, context &ctx) {
|
|
// visit([&](const auto &val) { format(buf, val, ctx); }, v);
|
|
// }
|
|
// };
|
|
template <typename Char = char> class dynamic_formatter {
|
|
private:
|
|
struct null_handler : internal::error_handler {
|
|
void on_align(alignment) {}
|
|
void on_plus() {}
|
|
void on_minus() {}
|
|
void on_space() {}
|
|
void on_hash() {}
|
|
};
|
|
|
|
public:
|
|
template <typename ParseContext>
|
|
auto parse(ParseContext& ctx) -> decltype(ctx.begin()) {
|
|
format_str_ = ctx.begin();
|
|
// Checks are deferred to formatting time when the argument type is known.
|
|
internal::dynamic_specs_handler<ParseContext> handler(specs_, ctx);
|
|
return parse_format_specs(ctx.begin(), ctx.end(), handler);
|
|
}
|
|
|
|
template <typename T, typename FormatContext>
|
|
auto format(const T& val, FormatContext& ctx) -> decltype(ctx.out()) {
|
|
handle_specs(ctx);
|
|
internal::specs_checker<null_handler> checker(
|
|
null_handler(), internal::get_type<FormatContext, T>::value);
|
|
checker.on_align(specs_.align());
|
|
if (specs_.flags == 0)
|
|
; // Do nothing.
|
|
else if (specs_.has(SIGN_FLAG))
|
|
specs_.has(PLUS_FLAG) ? checker.on_plus() : checker.on_space();
|
|
else if (specs_.has(MINUS_FLAG))
|
|
checker.on_minus();
|
|
else if (specs_.has(HASH_FLAG))
|
|
checker.on_hash();
|
|
if (specs_.precision != -1) checker.end_precision();
|
|
typedef output_range<typename FormatContext::iterator,
|
|
typename FormatContext::char_type>
|
|
range;
|
|
visit_format_arg(arg_formatter<range>(ctx, nullptr, &specs_),
|
|
internal::make_arg<FormatContext>(val));
|
|
return ctx.out();
|
|
}
|
|
|
|
private:
|
|
template <typename Context> void handle_specs(Context& ctx) {
|
|
internal::handle_dynamic_spec<internal::width_checker>(
|
|
specs_.width_, specs_.width_ref, ctx, format_str_);
|
|
internal::handle_dynamic_spec<internal::precision_checker>(
|
|
specs_.precision, specs_.precision_ref, ctx, format_str_);
|
|
}
|
|
|
|
internal::dynamic_format_specs<Char> specs_;
|
|
const Char* format_str_;
|
|
};
|
|
|
|
template <typename Range, typename Char>
|
|
typename basic_format_context<Range, Char>::format_arg
|
|
basic_format_context<Range, Char>::arg(basic_string_view<char_type> name) {
|
|
map_.init(args_);
|
|
format_arg arg = map_.find(name);
|
|
if (arg.type() == internal::none_type) this->on_error("argument not found");
|
|
return arg;
|
|
}
|
|
|
|
template <typename Char, typename ErrorHandler>
|
|
FMT_CONSTEXPR void advance_to(basic_parse_context<Char, ErrorHandler>& ctx,
|
|
const Char* p) {
|
|
ctx.advance_to(ctx.begin() + (p - &*ctx.begin()));
|
|
}
|
|
|
|
template <typename ArgFormatter, typename Char, typename Context>
|
|
struct format_handler : internal::error_handler {
|
|
typedef typename ArgFormatter::range range;
|
|
|
|
format_handler(range r, basic_string_view<Char> str,
|
|
basic_format_args<Context> format_args,
|
|
internal::locale_ref loc)
|
|
: parse_context(str), context(r.begin(), format_args, loc) {}
|
|
|
|
void on_text(const Char* begin, const Char* end) {
|
|
auto size = internal::to_unsigned(end - begin);
|
|
auto out = context.out();
|
|
auto&& it = internal::reserve(out, size);
|
|
it = std::copy_n(begin, size, it);
|
|
context.advance_to(out);
|
|
}
|
|
|
|
void get_arg(unsigned id) { arg = internal::get_arg(context, id); }
|
|
|
|
void on_arg_id() { get_arg(parse_context.next_arg_id()); }
|
|
void on_arg_id(unsigned id) {
|
|
parse_context.check_arg_id(id);
|
|
get_arg(id);
|
|
}
|
|
void on_arg_id(basic_string_view<Char> id) { arg = context.arg(id); }
|
|
|
|
void on_replacement_field(const Char* p) {
|
|
advance_to(parse_context, p);
|
|
internal::custom_formatter<Context> f(parse_context, context);
|
|
if (!visit_format_arg(f, arg))
|
|
context.advance_to(
|
|
visit_format_arg(ArgFormatter(context, &parse_context), arg));
|
|
}
|
|
|
|
const Char* on_format_specs(const Char* begin, const Char* end) {
|
|
advance_to(parse_context, begin);
|
|
internal::custom_formatter<Context> f(parse_context, context);
|
|
if (visit_format_arg(f, arg)) return parse_context.begin();
|
|
basic_format_specs<Char> specs;
|
|
using internal::specs_handler;
|
|
typedef basic_parse_context<Char> parse_context_t;
|
|
internal::specs_checker<specs_handler<parse_context_t, Context>> handler(
|
|
specs_handler<parse_context_t, Context>(specs, parse_context, context),
|
|
arg.type());
|
|
begin = parse_format_specs(begin, end, handler);
|
|
if (begin == end || *begin != '}') on_error("missing '}' in format string");
|
|
advance_to(parse_context, begin);
|
|
context.advance_to(
|
|
visit_format_arg(ArgFormatter(context, &parse_context, &specs), arg));
|
|
return begin;
|
|
}
|
|
|
|
basic_parse_context<Char> parse_context;
|
|
Context context;
|
|
basic_format_arg<Context> arg;
|
|
};
|
|
|
|
/** Formats arguments and writes the output to the range. */
|
|
template <typename ArgFormatter, typename Char, typename Context>
|
|
typename Context::iterator vformat_to(
|
|
typename ArgFormatter::range out, basic_string_view<Char> format_str,
|
|
basic_format_args<Context> args,
|
|
internal::locale_ref loc = internal::locale_ref()) {
|
|
format_handler<ArgFormatter, Char, Context> h(out, format_str, args, loc);
|
|
internal::parse_format_string<false>(format_str, h);
|
|
return h.context.out();
|
|
}
|
|
|
|
// Casts ``p`` to ``const void*`` for pointer formatting.
|
|
// Example:
|
|
// auto s = format("{}", ptr(p));
|
|
template <typename T> inline const void* ptr(const T* p) { return p; }
|
|
template <typename T> inline const void* ptr(const std::unique_ptr<T>& p) {
|
|
return p.get();
|
|
}
|
|
template <typename T> inline const void* ptr(const std::shared_ptr<T>& p) {
|
|
return p.get();
|
|
}
|
|
|
|
template <typename It, typename Char> struct arg_join {
|
|
It begin;
|
|
It end;
|
|
basic_string_view<Char> sep;
|
|
|
|
arg_join(It begin, It end, basic_string_view<Char> sep)
|
|
: begin(begin), end(end), sep(sep) {}
|
|
};
|
|
|
|
template <typename It, typename Char>
|
|
struct formatter<arg_join<It, Char>, Char>
|
|
: formatter<typename std::iterator_traits<It>::value_type, Char> {
|
|
template <typename FormatContext>
|
|
auto format(const arg_join<It, Char>& value, FormatContext& ctx)
|
|
-> decltype(ctx.out()) {
|
|
typedef formatter<typename std::iterator_traits<It>::value_type, Char> base;
|
|
auto it = value.begin;
|
|
auto out = ctx.out();
|
|
if (it != value.end) {
|
|
out = base::format(*it++, ctx);
|
|
while (it != value.end) {
|
|
out = std::copy(value.sep.begin(), value.sep.end(), out);
|
|
ctx.advance_to(out);
|
|
out = base::format(*it++, ctx);
|
|
}
|
|
}
|
|
return out;
|
|
}
|
|
};
|
|
|
|
/**
|
|
Returns an object that formats the iterator range `[begin, end)` with elements
|
|
separated by `sep`.
|
|
*/
|
|
template <typename It>
|
|
arg_join<It, char> join(It begin, It end, string_view sep) {
|
|
return arg_join<It, char>(begin, end, sep);
|
|
}
|
|
|
|
template <typename It>
|
|
arg_join<It, wchar_t> join(It begin, It end, wstring_view sep) {
|
|
return arg_join<It, wchar_t>(begin, end, sep);
|
|
}
|
|
|
|
// gcc 4.4 on join: internal compiler error: in tsubst_copy, at cp/pt.c:10122
|
|
#if !FMT_GCC_VERSION || FMT_GCC_VERSION >= 405
|
|
/**
|
|
\rst
|
|
Returns an object that formats `range` with elements separated by `sep`.
|
|
|
|
**Example**::
|
|
|
|
std::vector<int> v = {1, 2, 3};
|
|
fmt::print("{}", fmt::join(v, ", "));
|
|
// Output: "1, 2, 3"
|
|
\endrst
|
|
*/
|
|
template <typename Range>
|
|
arg_join<typename internal::iterator_t<Range>::type, char> join(
|
|
const Range& range, string_view sep) {
|
|
return join(internal::begin(range), internal::end(range), sep);
|
|
}
|
|
|
|
template <typename Range>
|
|
arg_join<typename internal::iterator_t<Range>::type, wchar_t> join(
|
|
const Range& range, wstring_view sep) {
|
|
return join(internal::begin(range), internal::end(range), sep);
|
|
}
|
|
#endif
|
|
|
|
/**
|
|
\rst
|
|
Converts *value* to ``std::string`` using the default format for type *T*.
|
|
It doesn't support user-defined types with custom formatters.
|
|
|
|
**Example**::
|
|
|
|
#include <fmt/format.h>
|
|
|
|
std::string answer = fmt::to_string(42);
|
|
\endrst
|
|
*/
|
|
template <typename T> inline std::string to_string(const T& value) {
|
|
return format("{}", value);
|
|
}
|
|
|
|
/**
|
|
Converts *value* to ``std::wstring`` using the default format for type *T*.
|
|
*/
|
|
template <typename T> inline std::wstring to_wstring(const T& value) {
|
|
return format(L"{}", value);
|
|
}
|
|
|
|
template <typename Char, std::size_t SIZE>
|
|
std::basic_string<Char> to_string(const basic_memory_buffer<Char, SIZE>& buf) {
|
|
return std::basic_string<Char>(buf.data(), buf.size());
|
|
}
|
|
|
|
template <typename Char>
|
|
typename buffer_context<Char>::iterator internal::vformat_to(
|
|
internal::buffer<Char>& buf, basic_string_view<Char> format_str,
|
|
basic_format_args<buffer_context<Char>> args) {
|
|
typedef back_insert_range<internal::buffer<Char>> range;
|
|
return vformat_to<arg_formatter<range>>(buf, to_string_view(format_str),
|
|
args);
|
|
}
|
|
|
|
template <typename S, typename Char = char_t<S>,
|
|
FMT_ENABLE_IF(internal::is_string<S>::value)>
|
|
inline typename buffer_context<Char>::iterator vformat_to(
|
|
internal::buffer<Char>& buf, const S& format_str,
|
|
basic_format_args<buffer_context<Char>> args) {
|
|
return internal::vformat_to(buf, to_string_view(format_str), args);
|
|
}
|
|
|
|
template <typename S, typename... Args, std::size_t SIZE = inline_buffer_size,
|
|
typename Char = enable_if_t<internal::is_string<S>::value, char_t<S>>>
|
|
inline typename buffer_context<Char>::iterator format_to(
|
|
basic_memory_buffer<Char, SIZE>& buf, const S& format_str,
|
|
const Args&... args) {
|
|
internal::check_format_string<Args...>(format_str);
|
|
using context = buffer_context<Char>;
|
|
format_arg_store<context, Args...> as{args...};
|
|
return internal::vformat_to(buf, to_string_view(format_str),
|
|
basic_format_args<context>(as));
|
|
}
|
|
|
|
namespace internal {
|
|
|
|
// Detect the iterator category of *any* given type in a SFINAE-friendly way.
|
|
// Unfortunately, older implementations of std::iterator_traits are not safe
|
|
// for use in a SFINAE-context.
|
|
|
|
// the gist of C++17's void_t magic
|
|
template <typename... Ts> struct void_ { typedef void type; };
|
|
|
|
template <typename T, typename Enable = void>
|
|
struct it_category : std::false_type {};
|
|
|
|
template <typename T> struct it_category<T*> {
|
|
typedef std::random_access_iterator_tag type;
|
|
};
|
|
|
|
template <typename T>
|
|
struct it_category<T, typename void_<typename T::iterator_category>::type> {
|
|
typedef typename T::iterator_category type;
|
|
};
|
|
|
|
// Detect if *any* given type models the OutputIterator concept.
|
|
template <typename It> class is_output_iterator {
|
|
// Check for mutability because all iterator categories derived from
|
|
// std::input_iterator_tag *may* also meet the requirements of an
|
|
// OutputIterator, thereby falling into the category of 'mutable iterators'
|
|
// [iterator.requirements.general] clause 4.
|
|
// The compiler reveals this property only at the point of *actually
|
|
// dereferencing* the iterator!
|
|
template <typename U>
|
|
static decltype(*(std::declval<U>())) test(std::input_iterator_tag);
|
|
template <typename U> static char& test(std::output_iterator_tag);
|
|
template <typename U> static const char& test(...);
|
|
|
|
typedef decltype(test<It>(typename it_category<It>::type{})) type;
|
|
typedef typename std::remove_reference<type>::type result;
|
|
|
|
public:
|
|
static const bool value = !std::is_const<result>::value;
|
|
};
|
|
} // namespace internal
|
|
|
|
template <typename OutputIt, typename Char = char>
|
|
// using format_context_t = basic_format_context<OutputIt, Char>;
|
|
struct format_context_t {
|
|
typedef basic_format_context<OutputIt, Char> type;
|
|
};
|
|
|
|
template <typename OutputIt, typename Char = char>
|
|
// using format_args_t = basic_format_args<format_context_t<OutputIt, Char>>;
|
|
struct format_args_t {
|
|
typedef basic_format_args<typename format_context_t<OutputIt, Char>::type>
|
|
type;
|
|
};
|
|
|
|
template <typename S, typename OutputIt, typename... Args,
|
|
FMT_ENABLE_IF(internal::is_output_iterator<OutputIt>::value &&
|
|
!is_contiguous_back_insert_iterator<OutputIt>::value)>
|
|
inline OutputIt vformat_to(
|
|
OutputIt out, const S& format_str,
|
|
typename format_args_t<OutputIt, char_t<S>>::type args) {
|
|
typedef output_range<OutputIt, char_t<S>> range;
|
|
return vformat_to<arg_formatter<range>>(range(out),
|
|
to_string_view(format_str), args);
|
|
}
|
|
|
|
/**
|
|
\rst
|
|
Formats arguments, writes the result to the output iterator ``out`` and returns
|
|
the iterator past the end of the output range.
|
|
|
|
**Example**::
|
|
|
|
std::vector<char> out;
|
|
fmt::format_to(std::back_inserter(out), "{}", 42);
|
|
\endrst
|
|
*/
|
|
template <typename OutputIt, typename S, typename... Args>
|
|
inline OutputIt format_to(OutputIt out, const S& format_str,
|
|
const Args&... args) {
|
|
static_assert(internal::is_output_iterator<OutputIt>::value &&
|
|
internal::is_string<S>::value,
|
|
"");
|
|
internal::check_format_string<Args...>(format_str);
|
|
typedef typename format_context_t<OutputIt, char_t<S>>::type context;
|
|
format_arg_store<context, Args...> as{args...};
|
|
return vformat_to(out, to_string_view(format_str),
|
|
basic_format_args<context>(as));
|
|
}
|
|
|
|
template <typename OutputIt> struct format_to_n_result {
|
|
/** Iterator past the end of the output range. */
|
|
OutputIt out;
|
|
/** Total (not truncated) output size. */
|
|
std::size_t size;
|
|
};
|
|
|
|
template <typename OutputIt, typename Char = typename OutputIt::value_type>
|
|
struct format_to_n_context
|
|
: format_context_t<fmt::internal::truncating_iterator<OutputIt>, Char> {};
|
|
|
|
template <typename OutputIt, typename Char = typename OutputIt::value_type>
|
|
struct format_to_n_args {
|
|
typedef basic_format_args<typename format_to_n_context<OutputIt, Char>::type>
|
|
type;
|
|
};
|
|
|
|
template <typename OutputIt, typename Char, typename... Args>
|
|
inline format_arg_store<typename format_to_n_context<OutputIt, Char>::type,
|
|
Args...>
|
|
make_format_to_n_args(const Args&... args) {
|
|
return format_arg_store<typename format_to_n_context<OutputIt, Char>::type,
|
|
Args...>(args...);
|
|
}
|
|
|
|
template <typename OutputIt, typename Char, typename... Args,
|
|
FMT_ENABLE_IF(internal::is_output_iterator<OutputIt>::value)>
|
|
inline format_to_n_result<OutputIt> vformat_to_n(
|
|
OutputIt out, std::size_t n, basic_string_view<Char> format_str,
|
|
typename format_to_n_args<OutputIt, Char>::type args) {
|
|
typedef internal::truncating_iterator<OutputIt> It;
|
|
auto it = vformat_to(It(out, n), format_str, args);
|
|
return {it.base(), it.count()};
|
|
}
|
|
|
|
/**
|
|
\rst
|
|
Formats arguments, writes up to ``n`` characters of the result to the output
|
|
iterator ``out`` and returns the total output size and the iterator past the
|
|
end of the output range.
|
|
\endrst
|
|
*/
|
|
template <typename OutputIt, typename S, typename... Args,
|
|
FMT_ENABLE_IF(internal::is_string<S>::value&&
|
|
internal::is_output_iterator<OutputIt>::value)>
|
|
inline format_to_n_result<OutputIt> format_to_n(OutputIt out, std::size_t n,
|
|
const S& format_str,
|
|
const Args&... args) {
|
|
internal::check_format_string<Args...>(format_str);
|
|
using Char = char_t<S>;
|
|
format_arg_store<typename format_to_n_context<OutputIt, Char>::type, Args...>
|
|
as(args...);
|
|
return vformat_to_n(out, n, to_string_view(format_str),
|
|
typename format_to_n_args<OutputIt, Char>::type(as));
|
|
}
|
|
|
|
template <typename Char>
|
|
inline std::basic_string<Char> internal::vformat(
|
|
basic_string_view<Char> format_str,
|
|
basic_format_args<buffer_context<Char>> args) {
|
|
basic_memory_buffer<Char> buffer;
|
|
internal::vformat_to(buffer, format_str, args);
|
|
return fmt::to_string(buffer);
|
|
}
|
|
|
|
/**
|
|
Returns the number of characters in the output of
|
|
``format(format_str, args...)``.
|
|
*/
|
|
template <typename... Args>
|
|
inline std::size_t formatted_size(string_view format_str, const Args&... args) {
|
|
auto it = format_to(internal::counting_iterator<char>(), format_str, args...);
|
|
return it.count();
|
|
}
|
|
|
|
#if FMT_USE_USER_DEFINED_LITERALS
|
|
namespace internal {
|
|
|
|
# if FMT_USE_UDL_TEMPLATE
|
|
template <typename Char, Char... CHARS> class udl_formatter {
|
|
public:
|
|
template <typename... Args>
|
|
std::basic_string<Char> operator()(const Args&... args) const {
|
|
FMT_CONSTEXPR_DECL Char s[] = {CHARS..., '\0'};
|
|
FMT_CONSTEXPR_DECL bool invalid_format =
|
|
do_check_format_string<Char, error_handler, Args...>(
|
|
basic_string_view<Char>(s, sizeof...(CHARS)));
|
|
(void)invalid_format;
|
|
return format(s, args...);
|
|
}
|
|
};
|
|
# else
|
|
template <typename Char> struct udl_formatter {
|
|
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)...);
|
|
}
|
|
};
|
|
# endif // FMT_USE_UDL_TEMPLATE
|
|
|
|
template <typename Char> struct udl_arg {
|
|
const Char* str;
|
|
|
|
template <typename T> named_arg<T, Char> operator=(T&& value) const {
|
|
return {str, std::forward<T>(value)};
|
|
}
|
|
};
|
|
|
|
} // namespace internal
|
|
|
|
inline namespace literals {
|
|
# if FMT_USE_UDL_TEMPLATE
|
|
template <typename Char, Char... CHARS>
|
|
FMT_CONSTEXPR internal::udl_formatter<Char, CHARS...> operator""_format() {
|
|
return {};
|
|
}
|
|
# else
|
|
/**
|
|
\rst
|
|
User-defined literal equivalent of :func:`fmt::format`.
|
|
|
|
**Example**::
|
|
|
|
using namespace fmt::literals;
|
|
std::string message = "The answer is {}"_format(42);
|
|
\endrst
|
|
*/
|
|
inline internal::udl_formatter<char> operator"" _format(const char* s,
|
|
std::size_t) {
|
|
return {s};
|
|
}
|
|
inline internal::udl_formatter<wchar_t> operator"" _format(const wchar_t* s,
|
|
std::size_t) {
|
|
return {s};
|
|
}
|
|
# endif // FMT_USE_UDL_TEMPLATE
|
|
|
|
/**
|
|
\rst
|
|
User-defined literal equivalent of :func:`fmt::arg`.
|
|
|
|
**Example**::
|
|
|
|
using namespace fmt::literals;
|
|
fmt::print("Elapsed time: {s:.2f} seconds", "s"_a=1.23);
|
|
\endrst
|
|
*/
|
|
inline internal::udl_arg<char> operator"" _a(const char* s, std::size_t) {
|
|
return {s};
|
|
}
|
|
inline internal::udl_arg<wchar_t> operator"" _a(const wchar_t* s, std::size_t) {
|
|
return {s};
|
|
}
|
|
} // namespace literals
|
|
#endif // FMT_USE_USER_DEFINED_LITERALS
|
|
FMT_END_NAMESPACE
|
|
|
|
/**
|
|
\rst
|
|
Constructs a compile-time format string.
|
|
|
|
**Example**::
|
|
|
|
// A compile-time error because 'd' is an invalid specifier for strings.
|
|
std::string s = format(FMT_STRING("{:d}"), "foo");
|
|
\endrst
|
|
*/
|
|
#define FMT_STRING(s) \
|
|
[] { \
|
|
struct str : fmt::compile_string { \
|
|
typedef typename std::remove_cv<std::remove_pointer< \
|
|
typename std::decay<decltype(s)>::type>::type>::type char_type; \
|
|
FMT_CONSTEXPR operator fmt::basic_string_view<char_type>() const { \
|
|
return {s, sizeof(s) / sizeof(char_type) - 1}; \
|
|
} \
|
|
} result; \
|
|
/* Suppress Qt Creator warning about unused operator. */ \
|
|
(void)static_cast<fmt::basic_string_view<typename str::char_type>>( \
|
|
result); \
|
|
return result; \
|
|
}()
|
|
|
|
#if defined(FMT_STRING_ALIAS) && FMT_STRING_ALIAS
|
|
/**
|
|
\rst
|
|
Constructs a compile-time format string. This macro is disabled by default to
|
|
prevent potential name collisions. To enable it define ``FMT_STRING_ALIAS`` to
|
|
1 before including ``fmt/format.h``.
|
|
|
|
**Example**::
|
|
|
|
#define FMT_STRING_ALIAS 1
|
|
#include <fmt/format.h>
|
|
// A compile-time error because 'd' is an invalid specifier for strings.
|
|
std::string s = format(fmt("{:d}"), "foo");
|
|
\endrst
|
|
*/
|
|
# define fmt(s) FMT_STRING(s)
|
|
#endif
|
|
|
|
#ifdef FMT_HEADER_ONLY
|
|
# define FMT_FUNC inline
|
|
# include "format-inl.h"
|
|
#else
|
|
# define FMT_FUNC
|
|
#endif
|
|
|
|
// Restore warnings.
|
|
#if FMT_GCC_VERSION >= 406 || FMT_CLANG_VERSION
|
|
# pragma GCC diagnostic pop
|
|
#endif
|
|
|
|
#endif // FMT_FORMAT_H_
|