diff options
| author | Jörg Frings-Fürst <debian@jff-webhosting.net> | 2018-07-11 07:33:08 +0200 |
|---|---|---|
| committer | Jörg Frings-Fürst <debian@jff-webhosting.net> | 2018-07-11 07:33:08 +0200 |
| commit | 621f4acf1406e51eaf5d9429c46625e6f5fde98e (patch) | |
| tree | 0fe1fd92a0502602f54b2bf12a8c247ef575d00f /lib/spdlog/fmt/bundled/format.h | |
| parent | 25d4e8d5ee396a852568b7ae1c15971a9da409db (diff) | |
| parent | 5aa4b715375b173e9c24363f977883786b05cd6d (diff) | |
Merge branch 'release/debian/2.0.0-1'debian/2.0.0-1
Diffstat (limited to 'lib/spdlog/fmt/bundled/format.h')
| -rw-r--r-- | lib/spdlog/fmt/bundled/format.h | 4920 |
1 files changed, 4920 insertions, 0 deletions
diff --git a/lib/spdlog/fmt/bundled/format.h b/lib/spdlog/fmt/bundled/format.h new file mode 100644 index 0000000..b4295cd --- /dev/null +++ b/lib/spdlog/fmt/bundled/format.h @@ -0,0 +1,4920 @@ +/* + Formatting library for C++ + + Copyright (c) 2012 - 2016, Victor Zverovich + All rights reserved. + + Redistribution and use in source and binary forms, with or without + modification, are permitted provided that the following conditions are met: + + 1. Redistributions of source code must retain the above copyright notice, this + list of conditions and the following disclaimer. + 2. Redistributions in binary form must reproduce the above copyright notice, + this list of conditions and the following disclaimer in the documentation + and/or other materials provided with the distribution. + + THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND + ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED + WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE + DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR + ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES + (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; + LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND + ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS + SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ + +#ifndef FMT_FORMAT_H_ +#define FMT_FORMAT_H_ + +#define FMT_INCLUDE +#include <cassert> +#include <clocale> +#include <cmath> +#include <cstdio> +#include <cstring> +#include <limits> +#include <memory> +#include <stdexcept> +#include <string> +#include <utility> // for std::pair +#include <vector> +#undef FMT_INCLUDE + +// The fmt library version in the form major * 10000 + minor * 100 + patch. +#define FMT_VERSION 40100 + +#if defined(__has_include) +#define FMT_HAS_INCLUDE(x) __has_include(x) +#else +#define FMT_HAS_INCLUDE(x) 0 +#endif + +#if (FMT_HAS_INCLUDE(<string_view>) && __cplusplus > 201402L) || (defined(_MSVC_LANG) && _MSVC_LANG > 201402L && _MSC_VER >= 1910) +#include <string_view> +#define FMT_HAS_STRING_VIEW 1 +#else +#define FMT_HAS_STRING_VIEW 0 +#endif + +#if defined _SECURE_SCL && _SECURE_SCL +#define FMT_SECURE_SCL _SECURE_SCL +#else +#define FMT_SECURE_SCL 0 +#endif + +#if FMT_SECURE_SCL +#include <iterator> +#endif + +#ifdef _MSC_VER +#define FMT_MSC_VER _MSC_VER +#else +#define FMT_MSC_VER 0 +#endif + +#if FMT_MSC_VER && FMT_MSC_VER <= 1500 +typedef unsigned __int32 uint32_t; +typedef unsigned __int64 uint64_t; +typedef __int64 intmax_t; +#else +#include <stdint.h> +#endif + +#if !defined(FMT_HEADER_ONLY) && defined(_WIN32) +#ifdef FMT_EXPORT +#define FMT_API __declspec(dllexport) +#elif defined(FMT_SHARED) +#define FMT_API __declspec(dllimport) +#endif +#endif +#ifndef FMT_API +#define FMT_API +#endif + +#ifdef __GNUC__ +#define FMT_GCC_VERSION (__GNUC__ * 100 + __GNUC_MINOR__) +#define FMT_GCC_EXTENSION __extension__ +#if FMT_GCC_VERSION >= 406 +#pragma GCC diagnostic push +// Disable the warning about "long long" which is sometimes reported even +// when using __extension__. +#pragma GCC diagnostic ignored "-Wlong-long" +// Disable the warning about declaration shadowing because it affects too +// many valid cases. +#pragma GCC diagnostic ignored "-Wshadow" +// Disable the warning about implicit conversions that may change the sign of +// an integer; silencing it otherwise would require many explicit casts. +#pragma GCC diagnostic ignored "-Wsign-conversion" +#endif +#if __cplusplus >= 201103L || defined __GXX_EXPERIMENTAL_CXX0X__ +#define FMT_HAS_GXX_CXX11 1 +#endif +#else +#define FMT_GCC_VERSION 0 +#define FMT_GCC_EXTENSION +#define FMT_HAS_GXX_CXX11 0 +#endif + +#if defined(__INTEL_COMPILER) +#define FMT_ICC_VERSION __INTEL_COMPILER +#elif defined(__ICL) +#define FMT_ICC_VERSION __ICL +#endif + +#if defined(__clang__) && !defined(FMT_ICC_VERSION) +#define FMT_CLANG_VERSION (__clang_major__ * 100 + __clang_minor__) +#pragma clang diagnostic push +#pragma clang diagnostic ignored "-Wdocumentation-unknown-command" +#pragma clang diagnostic ignored "-Wpadded" +#endif + +#ifdef __GNUC_LIBSTD__ +#define FMT_GNUC_LIBSTD_VERSION (__GNUC_LIBSTD__ * 100 + __GNUC_LIBSTD_MINOR__) +#endif + +#ifdef __has_feature +#define FMT_HAS_FEATURE(x) __has_feature(x) +#else +#define FMT_HAS_FEATURE(x) 0 +#endif + +#ifdef __has_builtin +#define FMT_HAS_BUILTIN(x) __has_builtin(x) +#else +#define FMT_HAS_BUILTIN(x) 0 +#endif + +#ifdef __has_cpp_attribute +#define FMT_HAS_CPP_ATTRIBUTE(x) __has_cpp_attribute(x) +#else +#define FMT_HAS_CPP_ATTRIBUTE(x) 0 +#endif + +#if FMT_HAS_CPP_ATTRIBUTE(maybe_unused) +#define FMT_HAS_CXX17_ATTRIBUTE_MAYBE_UNUSED +// VC++ 1910 support /std: option and that will set _MSVC_LANG macro +// Clang with Microsoft CodeGen doesn't define _MSVC_LANG macro +#elif defined(_MSVC_LANG) && _MSVC_LANG > 201402 && _MSC_VER >= 1910 +#define FMT_HAS_CXX17_ATTRIBUTE_MAYBE_UNUSED +#endif + +#ifdef FMT_HAS_CXX17_ATTRIBUTE_MAYBE_UNUSED +#define FMT_MAYBE_UNUSED [[maybe_unused]] +// g++/clang++ also support [[gnu::unused]]. However, we don't use it. +#elif defined(__GNUC__) +#define FMT_MAYBE_UNUSED __attribute__((unused)) +#else +#define FMT_MAYBE_UNUSED +#endif + +// Use the compiler's attribute noreturn +#if defined(__MINGW32__) || defined(__MINGW64__) +#define FMT_NORETURN __attribute__((noreturn)) +#elif FMT_HAS_CPP_ATTRIBUTE(noreturn) && __cplusplus >= 201103L +#define FMT_NORETURN [[noreturn]] +#else +#define FMT_NORETURN +#endif + +#ifndef FMT_USE_VARIADIC_TEMPLATES +// Variadic templates are available in GCC since version 4.4 +// (http://gcc.gnu.org/projects/cxx0x.html) and in Visual C++ +// since version 2013. +#define FMT_USE_VARIADIC_TEMPLATES \ + (FMT_HAS_FEATURE(cxx_variadic_templates) || (FMT_GCC_VERSION >= 404 && FMT_HAS_GXX_CXX11) || FMT_MSC_VER >= 1800) +#endif + +#ifndef FMT_USE_RVALUE_REFERENCES +// Don't use rvalue references when compiling with clang and an old libstdc++ +// as the latter doesn't provide std::move. +#if defined(FMT_GNUC_LIBSTD_VERSION) && FMT_GNUC_LIBSTD_VERSION <= 402 +#define FMT_USE_RVALUE_REFERENCES 0 +#else +#define FMT_USE_RVALUE_REFERENCES \ + (FMT_HAS_FEATURE(cxx_rvalue_references) || (FMT_GCC_VERSION >= 403 && FMT_HAS_GXX_CXX11) || FMT_MSC_VER >= 1600) +#endif +#endif + +#if __cplusplus >= 201103L || FMT_MSC_VER >= 1700 +#define FMT_USE_ALLOCATOR_TRAITS 1 +#else +#define FMT_USE_ALLOCATOR_TRAITS 0 +#endif + +// Check if exceptions are disabled. +#if defined(__GNUC__) && !defined(__EXCEPTIONS) +#define FMT_EXCEPTIONS 0 +#endif +#if FMT_MSC_VER && !_HAS_EXCEPTIONS +#define FMT_EXCEPTIONS 0 +#endif +#ifndef FMT_EXCEPTIONS +#define FMT_EXCEPTIONS 1 +#endif + +#ifndef FMT_THROW +#if FMT_EXCEPTIONS +#define FMT_THROW(x) throw x +#else +#define FMT_THROW(x) assert(false) +#endif +#endif + +// Define FMT_USE_NOEXCEPT to make fmt use noexcept (C++11 feature). +#ifndef FMT_USE_NOEXCEPT +#define FMT_USE_NOEXCEPT 0 +#endif + +#if FMT_USE_NOEXCEPT || FMT_HAS_FEATURE(cxx_noexcept) || (FMT_GCC_VERSION >= 408 && FMT_HAS_GXX_CXX11) || FMT_MSC_VER >= 1900 +#define FMT_DETECTED_NOEXCEPT noexcept +#else +#define FMT_DETECTED_NOEXCEPT throw() +#endif + +#ifndef FMT_NOEXCEPT +#if FMT_EXCEPTIONS +#define FMT_NOEXCEPT FMT_DETECTED_NOEXCEPT +#else +#define FMT_NOEXCEPT +#endif +#endif + +// This is needed because GCC still uses throw() in its headers when exceptions +// are disabled. +#if FMT_GCC_VERSION +#define FMT_DTOR_NOEXCEPT FMT_DETECTED_NOEXCEPT +#else +#define FMT_DTOR_NOEXCEPT FMT_NOEXCEPT +#endif + +#ifndef FMT_OVERRIDE +#if (defined(FMT_USE_OVERRIDE) && FMT_USE_OVERRIDE) || FMT_HAS_FEATURE(cxx_override) || (FMT_GCC_VERSION >= 408 && FMT_HAS_GXX_CXX11) || \ + FMT_MSC_VER >= 1900 +#define FMT_OVERRIDE override +#else +#define FMT_OVERRIDE +#endif +#endif + +#ifndef FMT_NULL +#if FMT_HAS_FEATURE(cxx_nullptr) || (FMT_GCC_VERSION >= 408 && FMT_HAS_GXX_CXX11) || FMT_MSC_VER >= 1600 +#define FMT_NULL nullptr +#else +#define FMT_NULL NULL +#endif +#endif + +// A macro to disallow the copy constructor and operator= functions +// This should be used in the private: declarations for a class +#ifndef FMT_USE_DELETED_FUNCTIONS +#define FMT_USE_DELETED_FUNCTIONS 0 +#endif + +#if FMT_USE_DELETED_FUNCTIONS || FMT_HAS_FEATURE(cxx_deleted_functions) || (FMT_GCC_VERSION >= 404 && FMT_HAS_GXX_CXX11) || \ + FMT_MSC_VER >= 1800 +#define FMT_DELETED_OR_UNDEFINED = delete +#define FMT_DISALLOW_COPY_AND_ASSIGN(TypeName) \ + TypeName(const TypeName &) = delete; \ + TypeName &operator=(const TypeName &) = delete +#else +#define FMT_DELETED_OR_UNDEFINED +#define FMT_DISALLOW_COPY_AND_ASSIGN(TypeName) \ + TypeName(const TypeName &); \ + TypeName &operator=(const TypeName &) +#endif + +#ifndef FMT_USE_DEFAULTED_FUNCTIONS +#define FMT_USE_DEFAULTED_FUNCTIONS 0 +#endif + +#ifndef FMT_DEFAULTED_COPY_CTOR +#if FMT_USE_DEFAULTED_FUNCTIONS || FMT_HAS_FEATURE(cxx_defaulted_functions) || (FMT_GCC_VERSION >= 404 && FMT_HAS_GXX_CXX11) || \ + FMT_MSC_VER >= 1800 +#define FMT_DEFAULTED_COPY_CTOR(TypeName) TypeName(const TypeName &) = default; +#else +#define FMT_DEFAULTED_COPY_CTOR(TypeName) +#endif +#endif + +#ifndef FMT_USE_USER_DEFINED_LITERALS +// All compilers which support UDLs also support variadic templates. This +// makes the fmt::literals implementation easier. However, an explicit check +// for variadic templates is added here just in case. +// For Intel's compiler both it and the system gcc/msc must support UDLs. +#if FMT_USE_VARIADIC_TEMPLATES && FMT_USE_RVALUE_REFERENCES && \ + (FMT_HAS_FEATURE(cxx_user_literals) || (FMT_GCC_VERSION >= 407 && FMT_HAS_GXX_CXX11) || FMT_MSC_VER >= 1900) && \ + (!defined(FMT_ICC_VERSION) || FMT_ICC_VERSION >= 1500) +#define FMT_USE_USER_DEFINED_LITERALS 1 +#else +#define FMT_USE_USER_DEFINED_LITERALS 0 +#endif +#endif + +#ifndef FMT_USE_EXTERN_TEMPLATES +#define FMT_USE_EXTERN_TEMPLATES (FMT_CLANG_VERSION >= 209 || (FMT_GCC_VERSION >= 303 && FMT_HAS_GXX_CXX11)) +#endif + +#ifdef FMT_HEADER_ONLY +// If header only do not use extern templates. +#undef FMT_USE_EXTERN_TEMPLATES +#define FMT_USE_EXTERN_TEMPLATES 0 +#endif + +#ifndef FMT_ASSERT +#define FMT_ASSERT(condition, message) assert((condition) && message) +#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 + +namespace fmt { +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) + +// avoid Clang with Microsoft CodeGen's -Wunknown-pragmas warning +#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 +} // namespace fmt +#endif + +namespace fmt { +namespace internal { +struct DummyInt +{ + int data[2]; + operator int() const + { + return 0; + } +}; +typedef std::numeric_limits<fmt::internal::DummyInt> FPUtil; + +// Dummy implementations of system functions such as signbit and ecvt called +// if the latter are not available. +inline DummyInt signbit(...) +{ + return DummyInt(); +} +inline DummyInt _ecvt_s(...) +{ + return DummyInt(); +} +inline DummyInt isinf(...) +{ + return DummyInt(); +} +inline DummyInt _finite(...) +{ + return DummyInt(); +} +inline DummyInt isnan(...) +{ + return DummyInt(); +} +inline DummyInt _isnan(...) +{ + return DummyInt(); +} + +// A helper function to suppress bogus "conditional expression is constant" +// warnings. +template<typename T> +inline T const_check(T value) +{ + return value; +} +} // namespace internal +} // namespace fmt + +namespace std { +// Standard permits specialization of std::numeric_limits. This specialization +// is used to resolve ambiguity between isinf and std::isinf in glibc: +// https://gcc.gnu.org/bugzilla/show_bug.cgi?id=48891 +// and the same for isnan and signbit. +template<> +class numeric_limits<fmt::internal::DummyInt> : public std::numeric_limits<int> +{ +public: + // Portable version of isinf. + template<typename T> + static bool isinfinity(T x) + { + using namespace fmt::internal; + // The resolution "priority" is: + // isinf macro > std::isinf > ::isinf > fmt::internal::isinf + if (const_check(sizeof(isinf(x)) == sizeof(bool) || sizeof(isinf(x)) == sizeof(int))) + { + return isinf(x) != 0; + } + return !_finite(static_cast<double>(x)); + } + + // Portable version of isnan. + template<typename T> + static bool isnotanumber(T x) + { + using namespace fmt::internal; + if (const_check(sizeof(isnan(x)) == sizeof(bool) || sizeof(isnan(x)) == sizeof(int))) + { + return isnan(x) != 0; + } + return _isnan(static_cast<double>(x)) != 0; + } + + // Portable version of signbit. + static bool isnegative(double x) + { + using namespace fmt::internal; + if (const_check(sizeof(signbit(x)) == sizeof(bool) || sizeof(signbit(x)) == sizeof(int))) + { + return signbit(x) != 0; + } + if (x < 0) + return true; + if (!isnotanumber(x)) + return false; + int dec = 0, sign = 0; + char buffer[2]; // The buffer size must be >= 2 or _ecvt_s will fail. + _ecvt_s(buffer, sizeof(buffer), x, 0, &dec, &sign); + return sign != 0; + } +}; +} // namespace std + +namespace fmt { + +// Fix the warning about long long on older versions of GCC +// that don't support the diagnostic pragma. +FMT_GCC_EXTENSION typedef long long LongLong; +FMT_GCC_EXTENSION typedef unsigned long long ULongLong; + +#if FMT_USE_RVALUE_REFERENCES +using std::move; +#endif + +template<typename Char> +class BasicWriter; + +typedef BasicWriter<char> Writer; +typedef BasicWriter<wchar_t> WWriter; + +template<typename Char> +class ArgFormatter; + +struct FormatSpec; + +template<typename Impl, typename Char, typename Spec = fmt::FormatSpec> +class BasicPrintfArgFormatter; + +template<typename CharType, typename ArgFormatter = fmt::ArgFormatter<CharType>> +class BasicFormatter; + +/** + \rst + A string reference. It can be constructed from a C string or + ``std::basic_string``. + + You can use one of the following typedefs for common character types: + + +------------+-------------------------+ + | Type | Definition | + +============+=========================+ + | StringRef | BasicStringRef<char> | + +------------+-------------------------+ + | WStringRef | BasicStringRef<wchar_t> | + +------------+-------------------------+ + + This class is most useful as a parameter type to allow passing + different types of strings to a function, for example:: + + template <typename... Args> + std::string format(StringRef format_str, const Args & ... args); + + format("{}", 42); + format(std::string("{}"), 42); + \endrst + */ +template<typename Char> +class BasicStringRef +{ +private: + const Char *data_; + std::size_t size_; + +public: + /** Constructs a string reference object from a C string and a size. */ + BasicStringRef(const Char *s, std::size_t size) + : data_(s) + , size_(size) + { + } + + /** + \rst + Constructs a string reference object from a C string computing + the size with ``std::char_traits<Char>::length``. + \endrst + */ + BasicStringRef(const Char *s) + : data_(s) + , size_(std::char_traits<Char>::length(s)) + { + } + + /** + \rst + Constructs a string reference from a ``std::basic_string`` object. + \endrst + */ + template<typename Allocator> + BasicStringRef(const std::basic_string<Char, std::char_traits<Char>, Allocator> &s) + : data_(s.c_str()) + , size_(s.size()) + { + } + +#if FMT_HAS_STRING_VIEW + /** + \rst + Constructs a string reference from a ``std::basic_string_view`` object. + \endrst + */ + BasicStringRef(const std::basic_string_view<Char, std::char_traits<Char>> &s) + : data_(s.data()) + , size_(s.size()) + { + } + + /** + \rst + Converts a string reference to an ``std::string_view`` object. + \endrst + */ + explicit operator std::basic_string_view<Char>() const FMT_NOEXCEPT + { + return std::basic_string_view<Char>(data_, size_); + } +#endif + + /** + \rst + Converts a string reference to an ``std::string`` object. + \endrst + */ + std::basic_string<Char> to_string() const + { + return std::basic_string<Char>(data_, size_); + } + + /** Returns a pointer to the string data. */ + const Char *data() const + { + return data_; + } + + /** Returns the string size. */ + std::size_t size() const + { + return size_; + } + + // Lexicographically compare this string reference to other. + int compare(BasicStringRef other) const + { + std::size_t size = size_ < other.size_ ? size_ : other.size_; + int result = std::char_traits<Char>::compare(data_, other.data_, size); + if (result == 0) + result = size_ == other.size_ ? 0 : (size_ < other.size_ ? -1 : 1); + return result; + } + + friend bool operator==(BasicStringRef lhs, BasicStringRef rhs) + { + return lhs.compare(rhs) == 0; + } + friend bool operator!=(BasicStringRef lhs, BasicStringRef rhs) + { + return lhs.compare(rhs) != 0; + } + friend bool operator<(BasicStringRef lhs, BasicStringRef rhs) + { + return lhs.compare(rhs) < 0; + } + friend bool operator<=(BasicStringRef lhs, BasicStringRef rhs) + { + return lhs.compare(rhs) <= 0; + } + friend bool operator>(BasicStringRef lhs, BasicStringRef rhs) + { + return lhs.compare(rhs) > 0; + } + friend bool operator>=(BasicStringRef lhs, BasicStringRef rhs) + { + return lhs.compare(rhs) >= 0; + } +}; + +typedef BasicStringRef<char> StringRef; +typedef BasicStringRef<wchar_t> WStringRef; + +/** + \rst + A reference to a null terminated string. It can be constructed from a C + string or ``std::basic_string``. + + You can use one of the following typedefs for common character types: + + +-------------+--------------------------+ + | Type | Definition | + +=============+==========================+ + | CStringRef | BasicCStringRef<char> | + +-------------+--------------------------+ + | WCStringRef | BasicCStringRef<wchar_t> | + +-------------+--------------------------+ + + This class is most useful as a parameter type to allow passing + different types of strings to a function, for example:: + + template <typename... Args> + std::string format(CStringRef format_str, const Args & ... args); + + format("{}", 42); + format(std::string("{}"), 42); + \endrst + */ +template<typename Char> +class BasicCStringRef +{ +private: + const Char *data_; + +public: + /** Constructs a string reference object from a C string. */ + BasicCStringRef(const Char *s) + : data_(s) + { + } + + /** + \rst + Constructs a string reference from a ``std::basic_string`` object. + \endrst + */ + template<typename Allocator> + BasicCStringRef(const std::basic_string<Char, std::char_traits<Char>, Allocator> &s) + : data_(s.c_str()) + { + } + + /** Returns the pointer to a C string. */ + const Char *c_str() const + { + return data_; + } +}; + +typedef BasicCStringRef<char> CStringRef; +typedef BasicCStringRef<wchar_t> WCStringRef; + +/** A formatting error such as invalid format string. */ +class FormatError : public std::runtime_error +{ +public: + explicit FormatError(CStringRef message) + : std::runtime_error(message.c_str()) + { + } + FormatError(const FormatError &ferr) + : std::runtime_error(ferr) + { + } + FMT_API ~FormatError() FMT_DTOR_NOEXCEPT FMT_OVERRIDE; +}; + +namespace internal { + +// MakeUnsigned<T>::Type gives an unsigned type corresponding to integer type T. +template<typename T> +struct MakeUnsigned +{ + typedef T Type; +}; + +#define FMT_SPECIALIZE_MAKE_UNSIGNED(T, U) \ + template<> \ + struct MakeUnsigned<T> \ + { \ + typedef U Type; \ + } + +FMT_SPECIALIZE_MAKE_UNSIGNED(char, unsigned char); +FMT_SPECIALIZE_MAKE_UNSIGNED(signed char, unsigned char); +FMT_SPECIALIZE_MAKE_UNSIGNED(short, unsigned short); +FMT_SPECIALIZE_MAKE_UNSIGNED(int, unsigned); +FMT_SPECIALIZE_MAKE_UNSIGNED(long, unsigned long); +FMT_SPECIALIZE_MAKE_UNSIGNED(LongLong, ULongLong); + +// Casts nonnegative integer to unsigned. +template<typename Int> +inline typename MakeUnsigned<Int>::Type to_unsigned(Int value) +{ + FMT_ASSERT(value >= 0, "negative value"); + return static_cast<typename MakeUnsigned<Int>::Type>(value); +} + +// The number of characters to store in the MemoryBuffer object itself +// to avoid dynamic memory allocation. +enum +{ + INLINE_BUFFER_SIZE = 500 +}; + +#if FMT_SECURE_SCL +// Use checked iterator to avoid warnings on MSVC. +template<typename T> +inline stdext::checked_array_iterator<T *> make_ptr(T *ptr, std::size_t size) +{ + return stdext::checked_array_iterator<T *>(ptr, size); +} +#else +template<typename T> +inline T *make_ptr(T *ptr, std::size_t) +{ + return ptr; +} +#endif +} // namespace internal + +/** + \rst + A buffer supporting a subset of ``std::vector``'s operations. + \endrst + */ +template<typename T> +class Buffer +{ +private: + FMT_DISALLOW_COPY_AND_ASSIGN(Buffer); + +protected: + T *ptr_; + std::size_t size_; + std::size_t capacity_; + + Buffer(T *ptr = FMT_NULL, std::size_t capacity = 0) + : ptr_(ptr) + , size_(0) + , capacity_(capacity) + { + } + + /** + \rst + Increases the buffer capacity to hold at least *size* elements updating + ``ptr_`` and ``capacity_``. + \endrst + */ + virtual void grow(std::size_t size) = 0; + +public: + virtual ~Buffer() {} + + /** Returns the size of this buffer. */ + std::size_t size() const + { + return size_; + } + + /** Returns the capacity of this buffer. */ + std::size_t capacity() const + { + return capacity_; + } + + /** + Resizes the buffer. If T is a POD type new elements may not be initialized. + */ + void resize(std::size_t new_size) + { + if (new_size > capacity_) + grow(new_size); + size_ = new_size; + } + + /** + \rst + Reserves space to store at least *capacity* elements. + \endrst + */ + void reserve(std::size_t capacity) + { + if (capacity > capacity_) + grow(capacity); + } + + void clear() FMT_NOEXCEPT + { + size_ = 0; + } + + void push_back(const T &value) + { + if (size_ == capacity_) + grow(size_ + 1); + ptr_[size_++] = value; + } + + /** Appends data to the end of the buffer. */ + template<typename U> + void append(const U *begin, const U *end); + + T &operator[](std::size_t index) + { + return ptr_[index]; + } + const T &operator[](std::size_t index) const + { + return ptr_[index]; + } +}; + +template<typename T> +template<typename U> +void Buffer<T>::append(const U *begin, const U *end) +{ + FMT_ASSERT(end >= begin, "negative value"); + std::size_t new_size = size_ + static_cast<std::size_t>(end - begin); + if (new_size > capacity_) + grow(new_size); + std::uninitialized_copy(begin, end, internal::make_ptr(ptr_, capacity_) + size_); + size_ = new_size; +} + +namespace internal { + +// A memory buffer for trivially copyable/constructible types with the first +// SIZE elements stored in the object itself. +template<typename T, std::size_t SIZE, typename Allocator = std::allocator<T>> +class MemoryBuffer : private Allocator, public Buffer<T> +{ +private: + T data_[SIZE]; + + // Deallocate memory allocated by the buffer. + void deallocate() + { + if (this->ptr_ != data_) + Allocator::deallocate(this->ptr_, this->capacity_); + } + +protected: + void grow(std::size_t size) FMT_OVERRIDE; + +public: + explicit MemoryBuffer(const Allocator &alloc = Allocator()) + : Allocator(alloc) + , Buffer<T>(data_, SIZE) + { + } + ~MemoryBuffer() FMT_OVERRIDE + { + deallocate(); + } + +#if FMT_USE_RVALUE_REFERENCES +private: + // Move data from other to this buffer. + void move(MemoryBuffer &other) + { + Allocator &this_alloc = *this, &other_alloc = other; + this_alloc = std::move(other_alloc); + this->size_ = other.size_; + this->capacity_ = other.capacity_; + if (other.ptr_ == other.data_) + { + this->ptr_ = data_; + std::uninitialized_copy(other.data_, other.data_ + this->size_, make_ptr(data_, this->capacity_)); + } + else + { + this->ptr_ = other.ptr_; + // Set pointer to the inline array so that delete is not called + // when deallocating. + other.ptr_ = other.data_; + } + } + +public: + MemoryBuffer(MemoryBuffer &&other) + { + move(other); + } + + MemoryBuffer &operator=(MemoryBuffer &&other) + { + assert(this != &other); + deallocate(); + move(other); + return *this; + } +#endif + + // Returns a copy of the allocator associated with this buffer. + Allocator get_allocator() const + { + return *this; + } +}; + +template<typename T, std::size_t SIZE, typename Allocator> +void MemoryBuffer<T, SIZE, Allocator>::grow(std::size_t size) +{ + std::size_t new_capacity = this->capacity_ + this->capacity_ / 2; + if (size > new_capacity) + new_capacity = size; +#if FMT_USE_ALLOCATOR_TRAITS + T *new_ptr = std::allocator_traits<Allocator>::allocate(*this, new_capacity, FMT_NULL); +#else + T *new_ptr = this->allocate(new_capacity, FMT_NULL); +#endif + // The following code doesn't throw, so the raw pointer above doesn't leak. + std::uninitialized_copy(this->ptr_, this->ptr_ + this->size_, make_ptr(new_ptr, new_capacity)); + std::size_t old_capacity = this->capacity_; + T *old_ptr = this->ptr_; + this->capacity_ = new_capacity; + this->ptr_ = new_ptr; + // deallocate may throw (at least in principle), but it doesn't matter since + // the buffer already uses the new storage and will deallocate it in case + // of exception. + if (old_ptr != data_) + Allocator::deallocate(old_ptr, old_capacity); +} + +// A fixed-size buffer. +template<typename Char> +class FixedBuffer : public fmt::Buffer<Char> +{ +public: + FixedBuffer(Char *array, std::size_t size) + : fmt::Buffer<Char>(array, size) + { + } + +protected: + FMT_API void grow(std::size_t size) FMT_OVERRIDE; +}; + +template<typename Char> +class BasicCharTraits +{ +public: +#if FMT_SECURE_SCL + typedef stdext::checked_array_iterator<Char *> CharPtr; +#else + typedef Char *CharPtr; +#endif + static Char cast(int value) + { + return static_cast<Char>(value); + } +}; + +template<typename Char> +class CharTraits; + +template<> +class CharTraits<char> : public BasicCharTraits<char> +{ +private: + // Conversion from wchar_t to char is not allowed. + static char convert(wchar_t); + +public: + static char convert(char value) + { + return value; + } + + // Formats a floating-point number. + template<typename T> + FMT_API static int format_float(char *buffer, std::size_t size, const char *format, unsigned width, int precision, T value); +}; + +#if FMT_USE_EXTERN_TEMPLATES +extern template int CharTraits<char>::format_float<double>( + char *buffer, std::size_t size, const char *format, unsigned width, int precision, double value); +extern template int CharTraits<char>::format_float<long double>( + char *buffer, std::size_t size, const char *format, unsigned width, int precision, long double value); +#endif + +template<> +class CharTraits<wchar_t> : public BasicCharTraits<wchar_t> +{ +public: + static wchar_t convert(char value) + { + return value; + } + static wchar_t convert(wchar_t value) + { + return value; + } + + template<typename T> + FMT_API static int format_float(wchar_t *buffer, std::size_t size, const wchar_t *format, unsigned width, int precision, T value); +}; + +#if FMT_USE_EXTERN_TEMPLATES +extern template int CharTraits<wchar_t>::format_float<double>( + wchar_t *buffer, std::size_t size, const wchar_t *format, unsigned width, int precision, double value); +extern template int CharTraits<wchar_t>::format_float<long double>( + wchar_t *buffer, std::size_t size, const wchar_t *format, unsigned width, int precision, long double value); +#endif + +// Checks if a number is negative - used to avoid warnings. +template<bool IsSigned> +struct SignChecker +{ + template<typename T> + static bool is_negative(T value) + { + return value < 0; + } +}; + +template<> +struct SignChecker<false> +{ + template<typename T> + static bool is_negative(T) + { + return false; + } +}; + +// Returns true if value is negative, false otherwise. +// Same as (value < 0) but doesn't produce warnings if T is an unsigned type. +template<typename T> +inline bool is_negative(T value) +{ + return SignChecker<std::numeric_limits<T>::is_signed>::is_negative(value); +} + +// Selects uint32_t if FitsIn32Bits is true, uint64_t otherwise. +template<bool FitsIn32Bits> +struct TypeSelector +{ + typedef uint32_t Type; +}; + +template<> +struct TypeSelector<false> +{ + typedef uint64_t Type; +}; + +template<typename T> +struct IntTraits +{ + // Smallest of uint32_t and uint64_t that is large enough to represent + // all values of T. + typedef typename TypeSelector<std::numeric_limits<T>::digits <= 32>::Type MainType; +}; + +FMT_API FMT_NORETURN void report_unknown_type(char code, const char *type); + +// Static data is placed in this class template to allow header-only +// configuration. +template<typename T = void> +struct FMT_API BasicData +{ + static const uint32_t POWERS_OF_10_32[]; + static const uint64_t POWERS_OF_10_64[]; + static const char DIGITS[]; +}; + +#if FMT_USE_EXTERN_TEMPLATES +extern template struct BasicData<void>; +#endif + +typedef BasicData<> Data; + +#ifdef FMT_BUILTIN_CLZLL +// Returns the number of decimal digits in n. Leading zeros are not counted +// except for n == 0 in which case count_digits returns 1. +inline unsigned count_digits(uint64_t n) +{ + // Based on http://graphics.stanford.edu/~seander/bithacks.html#IntegerLog10 + // and the benchmark https://github.com/localvoid/cxx-benchmark-count-digits. + int t = (64 - FMT_BUILTIN_CLZLL(n | 1)) * 1233 >> 12; + return to_unsigned(t) - (n < Data::POWERS_OF_10_64[t]) + 1; +} +#else +// Fallback version of count_digits used when __builtin_clz is not available. +inline unsigned count_digits(uint64_t n) +{ + unsigned count = 1; + for (;;) + { + // Integer division is slow so do it for a group of four digits instead + // of for every digit. The idea comes from the talk by Alexandrescu + // "Three Optimization Tips for C++". See speed-test for a comparison. + if (n < 10) + return count; + if (n < 100) + return count + 1; + if (n < 1000) + return count + 2; + if (n < 10000) + return count + 3; + n /= 10000u; + count += 4; + } +} +#endif + +#ifdef FMT_BUILTIN_CLZ +// Optional version of count_digits for better performance on 32-bit platforms. +inline unsigned count_digits(uint32_t n) +{ + int t = (32 - FMT_BUILTIN_CLZ(n | 1)) * 1233 >> 12; + return to_unsigned(t) - (n < Data::POWERS_OF_10_32[t]) + 1; +} +#endif + +// A functor that doesn't add a thousands separator. +struct NoThousandsSep +{ + template<typename Char> + void operator()(Char *) + { + } +}; + +// A functor that adds a thousands separator. +class ThousandsSep +{ +private: + fmt::StringRef sep_; + + // Index of a decimal digit with the least significant digit having index 0. + unsigned digit_index_; + +public: + explicit ThousandsSep(fmt::StringRef sep) + : sep_(sep) + , digit_index_(0) + { + } + + template<typename Char> + void operator()(Char *&buffer) + { + if (++digit_index_ % 3 != 0) + return; + buffer -= sep_.size(); + std::uninitialized_copy(sep_.data(), sep_.data() + sep_.size(), internal::make_ptr(buffer, sep_.size())); + } +}; + +// Formats a decimal unsigned integer value writing into buffer. +// thousands_sep is a functor that is called after writing each char to +// add a thousands separator if necessary. +template<typename UInt, typename Char, typename ThousandsSep> +inline void format_decimal(Char *buffer, UInt value, unsigned num_digits, ThousandsSep thousands_sep) +{ + buffer += num_digits; + while (value >= 100) + { + // Integer division is slow so do it for a group of two digits instead + // of for every digit. The idea comes from the talk by Alexandrescu + // "Three Optimization Tips for C++". See speed-test for a comparison. + unsigned index = static_cast<unsigned>((value % 100) * 2); + value /= 100; + *--buffer = Data::DIGITS[index + 1]; + thousands_sep(buffer); + *--buffer = Data::DIGITS[index]; + thousands_sep(buffer); + } + if (value < 10) + { + *--buffer = static_cast<char>('0' + value); + return; + } + unsigned index = static_cast<unsigned>(value * 2); + *--buffer = Data::DIGITS[index + 1]; + thousands_sep(buffer); + *--buffer = Data::DIGITS[index]; +} + +template<typename UInt, typename Char> +inline void format_decimal(Char *buffer, UInt value, unsigned num_digits) +{ + format_decimal(buffer, value, num_digits, NoThousandsSep()); + return; +} + +#ifndef _WIN32 +#define FMT_USE_WINDOWS_H 0 +#elif !defined(FMT_USE_WINDOWS_H) +#define FMT_USE_WINDOWS_H 1 +#endif + +// Define FMT_USE_WINDOWS_H to 0 to disable use of windows.h. +// All the functionality that relies on it will be disabled too. +#if FMT_USE_WINDOWS_H +// A converter from UTF-8 to UTF-16. +// It is only provided for Windows since other systems support UTF-8 natively. +class UTF8ToUTF16 +{ +private: + MemoryBuffer<wchar_t, INLINE_BUFFER_SIZE> buffer_; + +public: + FMT_API explicit UTF8ToUTF16(StringRef s); + operator WStringRef() const + { + return WStringRef(&buffer_[0], size()); + } + size_t size() const + { + return buffer_.size() - 1; + } + const wchar_t *c_str() const + { + return &buffer_[0]; + } + std::wstring str() const + { + return std::wstring(&buffer_[0], size()); + } +}; + +// A converter from UTF-16 to UTF-8. +// It is only provided for Windows since other systems support UTF-8 natively. +class UTF16ToUTF8 +{ +private: + MemoryBuffer<char, INLINE_BUFFER_SIZE> buffer_; + +public: + UTF16ToUTF8() {} + FMT_API explicit UTF16ToUTF8(WStringRef s); + operator StringRef() const + { + return StringRef(&buffer_[0], size()); + } + size_t size() const + { + return buffer_.size() - 1; + } + const char *c_str() const + { + return &buffer_[0]; + } + std::string str() const + { + return std::string(&buffer_[0], size()); + } + + // Performs conversion returning a system error code instead of + // throwing exception on conversion error. This method may still throw + // in case of memory allocation error. + FMT_API int convert(WStringRef s); +}; + +FMT_API void format_windows_error(fmt::Writer &out, int error_code, fmt::StringRef message) FMT_NOEXCEPT; +#endif + +// A formatting argument value. +struct Value +{ + template<typename Char> + struct StringValue + { + const Char *value; + std::size_t size; + }; + + typedef void (*FormatFunc)(void *formatter, const void *arg, void *format_str_ptr); + + struct CustomValue + { + const void *value; + FormatFunc format; + }; + + union + { + int int_value; + unsigned uint_value; + LongLong long_long_value; + ULongLong ulong_long_value; + double double_value; + long double long_double_value; + const void *pointer; + StringValue<char> string; + StringValue<signed char> sstring; + StringValue<unsigned char> ustring; + StringValue<wchar_t> wstring; + CustomValue custom; + }; + + enum Type + { + NONE, + NAMED_ARG, + // Integer types should go first, + INT, + UINT, + LONG_LONG, + ULONG_LONG, + BOOL, + CHAR, + LAST_INTEGER_TYPE = CHAR, + // followed by floating-point types. + DOUBLE, + LONG_DOUBLE, + LAST_NUMERIC_TYPE = LONG_DOUBLE, + CSTRING, + STRING, + WSTRING, + POINTER, + CUSTOM + }; +}; + +// A formatting argument. It is a trivially copyable/constructible type to +// allow storage in internal::MemoryBuffer. +struct Arg : Value +{ + Type type; +}; + +template<typename Char> +struct NamedArg; +template<typename Char, typename T> +struct NamedArgWithType; + +template<typename T = void> +struct Null +{ +}; + +// A helper class template to enable or disable overloads taking wide +// characters and strings in MakeValue. +template<typename T, typename Char> +struct WCharHelper +{ + typedef Null<T> Supported; + typedef T Unsupported; +}; + +template<typename T> +struct WCharHelper<T, wchar_t> +{ + typedef T Supported; + typedef Null<T> Unsupported; +}; + +typedef char Yes[1]; +typedef char No[2]; + +template<typename T> +T &get(); + +// These are non-members to workaround an overload resolution bug in bcc32. +Yes &convert(fmt::ULongLong); +No &convert(...); + +template<typename T, bool ENABLE_CONVERSION> +struct ConvertToIntImpl +{ + enum + { + value = ENABLE_CONVERSION + }; +}; + +template<typename T, bool ENABLE_CONVERSION> +struct ConvertToIntImpl2 +{ + enum + { + value = false + }; +}; + +template<typename T> +struct ConvertToIntImpl2<T, true> +{ + enum + { + // Don't convert numeric types. + value = ConvertToIntImpl<T, !std::numeric_limits<T>::is_specialized>::value + }; +}; + +template<typename T> +struct ConvertToInt +{ + enum + { + enable_conversion = sizeof(fmt::internal::convert(get<T>())) == sizeof(Yes) + }; + enum + { + value = ConvertToIntImpl2<T, enable_conversion>::value + }; +}; + +#define FMT_DISABLE_CONVERSION_TO_INT(Type) \ + template<> \ + struct ConvertToInt<Type> \ + { \ + enum \ + { \ + value = 0 \ + }; \ + } + +// Silence warnings about convering float to int. +FMT_DISABLE_CONVERSION_TO_INT(float); +FMT_DISABLE_CONVERSION_TO_INT(double); +FMT_DISABLE_CONVERSION_TO_INT(long double); + +template<bool B, class T = void> +struct EnableIf +{ +}; + +template<class T> +struct EnableIf<true, T> +{ + typedef T type; +}; + +template<bool B, class T, class F> +struct Conditional +{ + typedef T type; +}; + +template<class T, class F> +struct Conditional<false, T, F> +{ + typedef F type; +}; + +// For bcc32 which doesn't understand ! in template arguments. +template<bool> +struct Not +{ + enum + { + value = 0 + }; +}; + +template<> +struct Not<false> +{ + enum + { + value = 1 + }; +}; + +template<typename T> +struct FalseType +{ + enum + { + value = 0 + }; +}; + +template<typename T, T> +struct LConvCheck +{ + LConvCheck(int) {} +}; + +// Returns the thousands separator for the current locale. +// We check if ``lconv`` contains ``thousands_sep`` because on Android +// ``lconv`` is stubbed as an empty struct. +template<typename LConv> +inline StringRef thousands_sep(LConv *lc, LConvCheck<char * LConv::*, &LConv::thousands_sep> = 0) +{ + return lc->thousands_sep; +} + +inline fmt::StringRef thousands_sep(...) +{ + return ""; +} + +#define FMT_CONCAT(a, b) a##b + +#if FMT_GCC_VERSION >= 303 +#define FMT_UNUSED __attribute__((unused)) +#else +#define FMT_UNUSED +#endif + +#ifndef FMT_USE_STATIC_ASSERT +#define FMT_USE_STATIC_ASSERT 0 +#endif + +#if FMT_USE_STATIC_ASSERT || FMT_HAS_FEATURE(cxx_static_assert) || (FMT_GCC_VERSION >= 403 && FMT_HAS_GXX_CXX11) || _MSC_VER >= 1600 +#define FMT_STATIC_ASSERT(cond, message) static_assert(cond, message) +#else +#define FMT_CONCAT_(a, b) FMT_CONCAT(a, b) +#define FMT_STATIC_ASSERT(cond, message) typedef int FMT_CONCAT_(Assert, __LINE__)[(cond) ? 1 : -1] FMT_UNUSED +#endif + +template<typename Formatter> +void format_arg(Formatter &, ...) +{ + FMT_STATIC_ASSERT(FalseType<Formatter>::value, "Cannot format argument. To enable the use of ostream " + "operator<< include fmt/ostream.h. Otherwise provide " + "an overload of format_arg."); +} + +// Makes an Arg object from any type. +template<typename Formatter> +class MakeValue : public Arg +{ +public: + typedef typename Formatter::Char Char; + +private: + // The following two methods are private to disallow formatting of + // arbitrary pointers. If you want to output a pointer cast it to + // "void *" or "const void *". In particular, this forbids formatting + // of "[const] volatile char *" which is printed as bool by iostreams. + // Do not implement! + template<typename T> + MakeValue(const T *value); + template<typename T> + MakeValue(T *value); + + // The following methods are private to disallow formatting of wide + // characters and strings into narrow strings as in + // fmt::format("{}", L"test"); + // To fix this, use a wide format string: fmt::format(L"{}", L"test"). +#if !FMT_MSC_VER || defined(_NATIVE_WCHAR_T_DEFINED) + MakeValue(typename WCharHelper<wchar_t, Char>::Unsupported); +#endif + MakeValue(typename WCharHelper<wchar_t *, Char>::Unsupported); + MakeValue(typename WCharHelper<const wchar_t *, Char>::Unsupported); + MakeValue(typename WCharHelper<const std::wstring &, Char>::Unsupported); +#if FMT_HAS_STRING_VIEW + MakeValue(typename WCharHelper<const std::wstring_view &, Char>::Unsupported); +#endif + MakeValue(typename WCharHelper<WStringRef, Char>::Unsupported); + + void set_string(StringRef str) + { + string.value = str.data(); + string.size = str.size(); + } + + void set_string(WStringRef str) + { + wstring.value = str.data(); + wstring.size = str.size(); + } + + // Formats an argument of a custom type, such as a user-defined class. + template<typename T> + static void format_custom_arg(void *formatter, const void *arg, void *format_str_ptr) + { + format_arg(*static_cast<Formatter *>(formatter), *static_cast<const Char **>(format_str_ptr), *static_cast<const T *>(arg)); + } + +public: + MakeValue() {} + +#define FMT_MAKE_VALUE_(Type, field, TYPE, rhs) \ + MakeValue(Type value) \ + { \ + field = rhs; \ + } \ + static uint64_t type(Type) \ + { \ + return Arg::TYPE; \ + } + +#define FMT_MAKE_VALUE(Type, field, TYPE) FMT_MAKE_VALUE_(Type, field, TYPE, value) + + FMT_MAKE_VALUE(bool, int_value, BOOL) + FMT_MAKE_VALUE(short, int_value, INT) + FMT_MAKE_VALUE(unsigned short, uint_value, UINT) + FMT_MAKE_VALUE(int, int_value, INT) + FMT_MAKE_VALUE(unsigned, uint_value, UINT) + + MakeValue(long value) + { + // To minimize the number of types we need to deal with, long is + // translated either to int or to long long depending on its size. + if (const_check(sizeof(long) == sizeof(int))) + int_value = static_cast<int>(value); + else + long_long_value = value; + } + static uint64_t type(long) + { + return sizeof(long) == sizeof(int) ? Arg::INT : Arg::LONG_LONG; + } + + MakeValue(unsigned long value) + { + if (const_check(sizeof(unsigned long) == sizeof(unsigned))) + uint_value = static_cast<unsigned>(value); + else + ulong_long_value = value; + } + static uint64_t type(unsigned long) + { + return sizeof(unsigned long) == sizeof(unsigned) ? Arg::UINT : Arg::ULONG_LONG; + } + + FMT_MAKE_VALUE(LongLong, long_long_value, LONG_LONG) + FMT_MAKE_VALUE(ULongLong, ulong_long_value, ULONG_LONG) + FMT_MAKE_VALUE(float, double_value, DOUBLE) + FMT_MAKE_VALUE(double, double_value, DOUBLE) + FMT_MAKE_VALUE(long double, long_double_value, LONG_DOUBLE) + FMT_MAKE_VALUE(signed char, int_value, INT) + FMT_MAKE_VALUE(unsigned char, uint_value, UINT) + FMT_MAKE_VALUE(char, int_value, CHAR) + +#if __cplusplus >= 201103L + template<typename T, typename = typename std::enable_if<std::is_enum<T>::value && ConvertToInt<T>::value>::type> + MakeValue(T value) + { + int_value = value; + } + + template<typename T, typename = typename std::enable_if<std::is_enum<T>::value && ConvertToInt<T>::value>::type> + static uint64_t type(T) + { + return Arg::INT; + } +#endif + +#if !defined(_MSC_VER) || defined(_NATIVE_WCHAR_T_DEFINED) + MakeValue(typename WCharHelper<wchar_t, Char>::Supported value) + { + int_value = value; + } + static uint64_t type(wchar_t) + { + return Arg::CHAR; + } +#endif + +#define FMT_MAKE_STR_VALUE(Type, TYPE) \ + MakeValue(Type value) \ + { \ + set_string(value); \ + } \ + static uint64_t type(Type) \ + { \ + return Arg::TYPE; \ + } + + FMT_MAKE_VALUE(char *, string.value, CSTRING) + FMT_MAKE_VALUE(const char *, string.value, CSTRING) + FMT_MAKE_VALUE(signed char *, sstring.value, CSTRING) + FMT_MAKE_VALUE(const signed char *, sstring.value, CSTRING) + FMT_MAKE_VALUE(unsigned char *, ustring.value, CSTRING) + FMT_MAKE_VALUE(const unsigned char *, ustring.value, CSTRING) + FMT_MAKE_STR_VALUE(const std::string &, STRING) +#if FMT_HAS_STRING_VIEW + FMT_MAKE_STR_VALUE(const std::string_view &, STRING) +#endif + FMT_MAKE_STR_VALUE(StringRef, STRING) + FMT_MAKE_VALUE_(CStringRef, string.value, CSTRING, value.c_str()) + +#define FMT_MAKE_WSTR_VALUE(Type, TYPE) \ + MakeValue(typename WCharHelper<Type, Char>::Supported value) \ + { \ + set_string(value); \ + } \ + static uint64_t type(Type) \ + { \ + return Arg::TYPE; \ + } + + FMT_MAKE_WSTR_VALUE(wchar_t *, WSTRING) + FMT_MAKE_WSTR_VALUE(const wchar_t *, WSTRING) + FMT_MAKE_WSTR_VALUE(const std::wstring &, WSTRING) +#if FMT_HAS_STRING_VIEW + FMT_MAKE_WSTR_VALUE(const std::wstring_view &, WSTRING) +#endif + FMT_MAKE_WSTR_VALUE(WStringRef, WSTRING) + + FMT_MAKE_VALUE(void *, pointer, POINTER) + FMT_MAKE_VALUE(const void *, pointer, POINTER) + + template<typename T> + MakeValue(const T &value, typename EnableIf<Not<ConvertToInt<T>::value>::value, int>::type = 0) + { + custom.value = &value; + custom.format = &format_custom_arg<T>; + } + + template<typename T> + static typename EnableIf<Not<ConvertToInt<T>::value>::value, uint64_t>::type type(const T &) + { + return Arg::CUSTOM; + } + + // Additional template param `Char_` is needed here because make_type always + // uses char. + template<typename Char_> + MakeValue(const NamedArg<Char_> &value) + { + pointer = &value; + } + template<typename Char_, typename T> + MakeValue(const NamedArgWithType<Char_, T> &value) + { + pointer = &value; + } + + template<typename Char_> + static uint64_t type(const NamedArg<Char_> &) + { + return Arg::NAMED_ARG; + } + template<typename Char_, typename T> + static uint64_t type(const NamedArgWithType<Char_, T> &) + { + return Arg::NAMED_ARG; + } +}; + +template<typename Formatter> +class MakeArg : public Arg +{ +public: + MakeArg() + { + type = Arg::NONE; + } + + template<typename T> + MakeArg(const T &value) + : Arg(MakeValue<Formatter>(value)) + { + type = static_cast<Arg::Type>(MakeValue<Formatter>::type(value)); + } +}; + +template<typename Char> +struct NamedArg : Arg +{ + BasicStringRef<Char> name; + + template<typename T> + NamedArg(BasicStringRef<Char> argname, const T &value) + : Arg(MakeArg<BasicFormatter<Char>>(value)) + , name(argname) + { + } +}; + +template<typename Char, typename T> +struct NamedArgWithType : NamedArg<Char> +{ + NamedArgWithType(BasicStringRef<Char> argname, const T &value) + : NamedArg<Char>(argname, value) + { + } +}; + +class RuntimeError : public std::runtime_error +{ +protected: + RuntimeError() + : std::runtime_error("") + { + } + RuntimeError(const RuntimeError &rerr) + : std::runtime_error(rerr) + { + } + FMT_API ~RuntimeError() FMT_DTOR_NOEXCEPT FMT_OVERRIDE; +}; + +template<typename Char> +class ArgMap; +} // namespace internal + +/** An argument list. */ +class ArgList +{ +private: + // To reduce compiled code size per formatting function call, types of first + // MAX_PACKED_ARGS arguments are passed in the types_ field. + uint64_t types_; + union + { + // If the number of arguments is less than MAX_PACKED_ARGS, the argument + // values are stored in values_, otherwise they are stored in args_. + // This is done to reduce compiled code size as storing larger objects + // may require more code (at least on x86-64) even if the same amount of + // data is actually copied to stack. It saves ~10% on the bloat test. + const internal::Value *values_; + const internal::Arg *args_; + }; + + internal::Arg::Type type(unsigned index) const + { + return type(types_, index); + } + + template<typename Char> + friend class internal::ArgMap; + +public: + // Maximum number of arguments with packed types. + enum + { + MAX_PACKED_ARGS = 16 + }; + + ArgList() + : types_(0) + { + } + + ArgList(ULongLong types, const internal::Value *values) + : types_(types) + , values_(values) + { + } + ArgList(ULongLong types, const internal::Arg *args) + : types_(types) + , args_(args) + { + } + + uint64_t types() const + { + return types_; + } + + /** Returns the argument at specified index. */ + internal::Arg operator[](unsigned index) const + { + using internal::Arg; + Arg arg; + bool use_values = type(MAX_PACKED_ARGS - 1) == Arg::NONE; + if (index < MAX_PACKED_ARGS) + { + Arg::Type arg_type = type(index); + internal::Value &val = arg; + if (arg_type != Arg::NONE) + val = use_values ? values_[index] : args_[index]; + arg.type = arg_type; + return arg; + } + if (use_values) + { + // The index is greater than the number of arguments that can be stored + // in values, so return a "none" argument. + arg.type = Arg::NONE; + return arg; + } + for (unsigned i = MAX_PACKED_ARGS; i <= index; ++i) + { + if (args_[i].type == Arg::NONE) + return args_[i]; + } + return args_[index]; + } + + static internal::Arg::Type type(uint64_t types, unsigned index) + { + unsigned shift = index * 4; + uint64_t mask = 0xf; + return static_cast<internal::Arg::Type>((types & (mask << shift)) >> shift); + } +}; + +#define FMT_DISPATCH(call) static_cast<Impl *>(this)->call + +/** + \rst + An argument visitor based on the `curiously recurring template pattern + <http://en.wikipedia.org/wiki/Curiously_recurring_template_pattern>`_. + + To use `~fmt::ArgVisitor` define a subclass that implements some or all of the + visit methods with the same signatures as the methods in `~fmt::ArgVisitor`, + for example, `~fmt::ArgVisitor::visit_int()`. + Pass the subclass as the *Impl* template parameter. Then calling + `~fmt::ArgVisitor::visit` for some argument will dispatch to a visit method + specific to the argument type. For example, if the argument type is + ``double`` then the `~fmt::ArgVisitor::visit_double()` method of a subclass + will be called. If the subclass doesn't contain a method with this signature, + then a corresponding method of `~fmt::ArgVisitor` will be called. + + **Example**:: + + class MyArgVisitor : public fmt::ArgVisitor<MyArgVisitor, void> { + public: + void visit_int(int value) { fmt::print("{}", value); } + void visit_double(double value) { fmt::print("{}", value ); } + }; + \endrst + */ +template<typename Impl, typename Result> +class ArgVisitor +{ +private: + typedef internal::Arg Arg; + +public: + void report_unhandled_arg() {} + + Result visit_unhandled_arg() + { + FMT_DISPATCH(report_unhandled_arg()); + return Result(); + } + + /** Visits an ``int`` argument. **/ + Result visit_int(int value) + { + return FMT_DISPATCH(visit_any_int(value)); + } + + /** Visits a ``long long`` argument. **/ + Result visit_long_long(LongLong value) + { + return FMT_DISPATCH(visit_any_int(value)); + } + + /** Visits an ``unsigned`` argument. **/ + Result visit_uint(unsigned value) + { + return FMT_DISPATCH(visit_any_int(value)); + } + + /** Visits an ``unsigned long long`` argument. **/ + Result visit_ulong_long(ULongLong value) + { + return FMT_DISPATCH(visit_any_int(value)); + } + + /** Visits a ``bool`` argument. **/ + Result visit_bool(bool value) + { + return FMT_DISPATCH(visit_any_int(value)); + } + + /** Visits a ``char`` or ``wchar_t`` argument. **/ + Result visit_char(int value) + { + return FMT_DISPATCH(visit_any_int(value)); + } + + /** Visits an argument of any integral type. **/ + template<typename T> + Result visit_any_int(T) + { + return FMT_DISPATCH(visit_unhandled_arg()); + } + + /** Visits a ``double`` argument. **/ + Result visit_double(double value) + { + return FMT_DISPATCH(visit_any_double(value)); + } + + /** Visits a ``long double`` argument. **/ + Result visit_long_double(long double value) + { + return FMT_DISPATCH(visit_any_double(value)); + } + + /** Visits a ``double`` or ``long double`` argument. **/ + template<typename T> + Result visit_any_double(T) + { + return FMT_DISPATCH(visit_unhandled_arg()); + } + + /** Visits a null-terminated C string (``const char *``) argument. **/ + Result visit_cstring(const char *) + { + return FMT_DISPATCH(visit_unhandled_arg()); + } + + /** Visits a string argument. **/ + Result visit_string(Arg::StringValue<char>) + { + return FMT_DISPATCH(visit_unhandled_arg()); + } + + /** Visits a wide string argument. **/ + Result visit_wstring(Arg::StringValue<wchar_t>) + { + return FMT_DISPATCH(visit_unhandled_arg()); + } + + /** Visits a pointer argument. **/ + Result visit_pointer(const void *) + { + return FMT_DISPATCH(visit_unhandled_arg()); + } + + /** Visits an argument of a custom (user-defined) type. **/ + Result visit_custom(Arg::CustomValue) + { + return FMT_DISPATCH(visit_unhandled_arg()); + } + + /** + \rst + Visits an argument dispatching to the appropriate visit method based on + the argument type. For example, if the argument type is ``double`` then + the `~fmt::ArgVisitor::visit_double()` method of the *Impl* class will be + called. + \endrst + */ + Result visit(const Arg &arg) + { + switch (arg.type) + { + case Arg::NONE: + case Arg::NAMED_ARG: + FMT_ASSERT(false, "invalid argument type"); + break; + case Arg::INT: + return FMT_DISPATCH(visit_int(arg.int_value)); + case Arg::UINT: + return FMT_DISPATCH(visit_uint(arg.uint_value)); + case Arg::LONG_LONG: + return FMT_DISPATCH(visit_long_long(arg.long_long_value)); + case Arg::ULONG_LONG: + return FMT_DISPATCH(visit_ulong_long(arg.ulong_long_value)); + case Arg::BOOL: + return FMT_DISPATCH(visit_bool(arg.int_value != 0)); + case Arg::CHAR: + return FMT_DISPATCH(visit_char(arg.int_value)); + case Arg::DOUBLE: + return FMT_DISPATCH(visit_double(arg.double_value)); + case Arg::LONG_DOUBLE: + return FMT_DISPATCH(visit_long_double(arg.long_double_value)); + case Arg::CSTRING: + return FMT_DISPATCH(visit_cstring(arg.string.value)); + case Arg::STRING: + return FMT_DISPATCH(visit_string(arg.string)); + case Arg::WSTRING: + return FMT_DISPATCH(visit_wstring(arg.wstring)); + case Arg::POINTER: + return FMT_DISPATCH(visit_pointer(arg.pointer)); + case Arg::CUSTOM: + return FMT_DISPATCH(visit_custom(arg.custom)); + } + return Result(); + } +}; + +enum Alignment +{ + ALIGN_DEFAULT, + ALIGN_LEFT, + ALIGN_RIGHT, + ALIGN_CENTER, + ALIGN_NUMERIC +}; + +// Flags. +enum +{ + SIGN_FLAG = 1, + PLUS_FLAG = 2, + MINUS_FLAG = 4, + HASH_FLAG = 8, + CHAR_FLAG = 0x10 // Argument has char type - used in error reporting. +}; + +// An empty format specifier. +struct EmptySpec +{ +}; + +// A type specifier. +template<char TYPE> +struct TypeSpec : EmptySpec +{ + Alignment align() const + { + return ALIGN_DEFAULT; + } + unsigned width() const + { + return 0; + } + int precision() const + { + return -1; + } + bool flag(unsigned) const + { + return false; + } + char type() const + { + return TYPE; + } + char type_prefix() const + { + return TYPE; + } + char fill() const + { + return ' '; + } +}; + +// A width specifier. +struct WidthSpec +{ + unsigned width_; + // Fill is always wchar_t and cast to char if necessary to avoid having + // two specialization of WidthSpec and its subclasses. + wchar_t fill_; + + WidthSpec(unsigned width, wchar_t fill) + : width_(width) + , fill_(fill) + { + } + + unsigned width() const + { + return width_; + } + wchar_t fill() const + { + return fill_; + } +}; + +// An alignment specifier. +struct AlignSpec : WidthSpec +{ + Alignment align_; + + AlignSpec(unsigned width, wchar_t fill, Alignment align = ALIGN_DEFAULT) + : WidthSpec(width, fill) + , align_(align) + { + } + + Alignment align() const + { + return align_; + } + + int precision() const + { + return -1; + } +}; + +// An alignment and type specifier. +template<char TYPE> +struct AlignTypeSpec : AlignSpec +{ + AlignTypeSpec(unsigned width, wchar_t fill) + : AlignSpec(width, fill) + { + } + + bool flag(unsigned) const + { + return false; + } + char type() const + { + return TYPE; + } + char type_prefix() const + { + return TYPE; + } +}; + +// A full format specifier. +struct FormatSpec : AlignSpec +{ + unsigned flags_; + int precision_; + char type_; + + FormatSpec(unsigned width = 0, char type = 0, wchar_t fill = ' ') + : AlignSpec(width, fill) + , flags_(0) + , precision_(-1) + , type_(type) + { + } + + bool flag(unsigned f) const + { + return (flags_ & f) != 0; + } + int precision() const + { + return precision_; + } + char type() const + { + return type_; + } + char type_prefix() const + { + return type_; + } +}; + +// An integer format specifier. +template<typename T, typename SpecT = TypeSpec<0>, typename Char = char> +class IntFormatSpec : public SpecT +{ +private: + T value_; + +public: + IntFormatSpec(T val, const SpecT &spec = SpecT()) + : SpecT(spec) + , value_(val) + { + } + + T value() const + { + return value_; + } +}; + +// A string format specifier. +template<typename Char> +class StrFormatSpec : public AlignSpec +{ +private: + const Char *str_; + +public: + template<typename FillChar> + StrFormatSpec(const Char *str, unsigned width, FillChar fill) + : AlignSpec(width, fill) + , str_(str) + { + internal::CharTraits<Char>::convert(FillChar()); + } + + const Char *str() const + { + return str_; + } +}; + +/** + Returns an integer format specifier to format the value in base 2. + */ +IntFormatSpec<int, TypeSpec<'b'>> bin(int value); + +/** + Returns an integer format specifier to format the value in base 8. + */ +IntFormatSpec<int, TypeSpec<'o'>> oct(int value); + +/** + Returns an integer format specifier to format the value in base 16 using + lower-case letters for the digits above 9. + */ +IntFormatSpec<int, TypeSpec<'x'>> hex(int value); + +/** + Returns an integer formatter format specifier to format in base 16 using + upper-case letters for the digits above 9. + */ +IntFormatSpec<int, TypeSpec<'X'>> hexu(int value); + +/** + \rst + Returns an integer format specifier to pad the formatted argument with the + fill character to the specified width using the default (right) numeric + alignment. + + **Example**:: + + MemoryWriter out; + out << pad(hex(0xcafe), 8, '0'); + // out.str() == "0000cafe" + + \endrst + */ +template<char TYPE_CODE, typename Char> +IntFormatSpec<int, AlignTypeSpec<TYPE_CODE>, Char> pad(int value, unsigned width, Char fill = ' '); + +#define FMT_DEFINE_INT_FORMATTERS(TYPE) \ + inline IntFormatSpec<TYPE, TypeSpec<'b'>> bin(TYPE value) \ + { \ + return IntFormatSpec<TYPE, TypeSpec<'b'>>(value, TypeSpec<'b'>()); \ + } \ + \ + inline IntFormatSpec<TYPE, TypeSpec<'o'>> oct(TYPE value) \ + { \ + return IntFormatSpec<TYPE, TypeSpec<'o'>>(value, TypeSpec<'o'>()); \ + } \ + \ + inline IntFormatSpec<TYPE, TypeSpec<'x'>> hex(TYPE value) \ + { \ + return IntFormatSpec<TYPE, TypeSpec<'x'>>(value, TypeSpec<'x'>()); \ + } \ + \ + inline IntFormatSpec<TYPE, TypeSpec<'X'>> hexu(TYPE value) \ + { \ + return IntFormatSpec<TYPE, TypeSpec<'X'>>(value, TypeSpec<'X'>()); \ + } \ + \ + template<char TYPE_CODE> \ + inline IntFormatSpec<TYPE, AlignTypeSpec<TYPE_CODE>> pad(IntFormatSpec<TYPE, TypeSpec<TYPE_CODE>> f, unsigned width) \ + { \ + return IntFormatSpec<TYPE, AlignTypeSpec<TYPE_CODE>>(f.value(), AlignTypeSpec<TYPE_CODE>(width, ' ')); \ + } \ + \ + /* For compatibility with older compilers we provide two overloads for pad, */ \ + /* one that takes a fill character and one that doesn't. In the future this */ \ + /* can be replaced with one overload making the template argument Char */ \ + /* default to char (C++11). */ \ + template<char TYPE_CODE, typename Char> \ + inline IntFormatSpec<TYPE, AlignTypeSpec<TYPE_CODE>, Char> pad( \ + IntFormatSpec<TYPE, TypeSpec<TYPE_CODE>, Char> f, unsigned width, Char fill) \ + { \ + return IntFormatSpec<TYPE, AlignTypeSpec<TYPE_CODE>, Char>(f.value(), AlignTypeSpec<TYPE_CODE>(width, fill)); \ + } \ + \ + inline IntFormatSpec<TYPE, AlignTypeSpec<0>> pad(TYPE value, unsigned width) \ + { \ + return IntFormatSpec<TYPE, AlignTypeSpec<0>>(value, AlignTypeSpec<0>(width, ' ')); \ + } \ + \ + template<typename Char> \ + inline IntFormatSpec<TYPE, AlignTypeSpec<0>, Char> pad(TYPE value, unsigned width, Char fill) \ + { \ + return IntFormatSpec<TYPE, AlignTypeSpec<0>, Char>(value, AlignTypeSpec<0>(width, fill)); \ + } + +FMT_DEFINE_INT_FORMATTERS(int) +FMT_DEFINE_INT_FORMATTERS(long) +FMT_DEFINE_INT_FORMATTERS(unsigned) +FMT_DEFINE_INT_FORMATTERS(unsigned long) +FMT_DEFINE_INT_FORMATTERS(LongLong) +FMT_DEFINE_INT_FORMATTERS(ULongLong) + +/** + \rst + Returns a string formatter that pads the formatted argument with the fill + character to the specified width using the default (left) string alignment. + + **Example**:: + + std::string s = str(MemoryWriter() << pad("abc", 8)); + // s == "abc " + + \endrst + */ +template<typename Char> +inline StrFormatSpec<Char> pad(const Char *str, unsigned width, Char fill = ' ') +{ + return StrFormatSpec<Char>(str, width, fill); +} + +inline StrFormatSpec<wchar_t> pad(const wchar_t *str, unsigned width, char fill = ' ') +{ + return StrFormatSpec<wchar_t>(str, width, fill); +} + +namespace internal { + +template<typename Char> +class ArgMap +{ +private: + typedef std::vector<std::pair<fmt::BasicStringRef<Char>, internal::Arg>> MapType; + typedef typename MapType::value_type Pair; + + MapType map_; + +public: + void init(const ArgList &args); + + const internal::Arg *find(const fmt::BasicStringRef<Char> &name) const + { + // The list is unsorted, so just return the first matching name. + for (typename MapType::const_iterator it = map_.begin(), end = map_.end(); it != end; ++it) + { + if (it->first == name) + return &it->second; + } + return FMT_NULL; + } +}; + +template<typename Char> +void ArgMap<Char>::init(const ArgList &args) +{ + if (!map_.empty()) + return; + typedef internal::NamedArg<Char> NamedArg; + const NamedArg *named_arg = FMT_NULL; + bool use_values = args.type(ArgList::MAX_PACKED_ARGS - 1) == internal::Arg::NONE; + if (use_values) + { + for (unsigned i = 0; /*nothing*/; ++i) + { + internal::Arg::Type arg_type = args.type(i); + switch (arg_type) + { + case internal::Arg::NONE: + return; + case internal::Arg::NAMED_ARG: + named_arg = static_cast<const NamedArg *>(args.values_[i].pointer); + map_.push_back(Pair(named_arg->name, *named_arg)); + break; + default: + /*nothing*/ + ; + } + } + return; + } + for (unsigned i = 0; i != ArgList::MAX_PACKED_ARGS; ++i) + { + internal::Arg::Type arg_type = args.type(i); + if (arg_type == internal::Arg::NAMED_ARG) + { + named_arg = static_cast<const NamedArg *>(args.args_[i].pointer); + map_.push_back(Pair(named_arg->name, *named_arg)); + } + } + for (unsigned i = ArgList::MAX_PACKED_ARGS; /*nothing*/; ++i) + { + switch (args.args_[i].type) + { + case internal::Arg::NONE: + return; + case internal::Arg::NAMED_ARG: + named_arg = static_cast<const NamedArg *>(args.args_[i].pointer); + map_.push_back(Pair(named_arg->name, *named_arg)); + break; + default: + /*nothing*/ + ; + } + } +} + +template<typename Impl, typename Char, typename Spec = fmt::FormatSpec> +class ArgFormatterBase : public ArgVisitor<Impl, void> +{ +private: + BasicWriter<Char> &writer_; + Spec &spec_; + + FMT_DISALLOW_COPY_AND_ASSIGN(ArgFormatterBase); + + void write_pointer(const void *p) + { + spec_.flags_ = HASH_FLAG; + spec_.type_ = 'x'; + writer_.write_int(reinterpret_cast<uintptr_t>(p), spec_); + } + + // workaround MSVC two-phase lookup issue + typedef internal::Arg Arg; + +protected: + BasicWriter<Char> &writer() + { + return writer_; + } + Spec &spec() + { + return spec_; + } + + void write(bool value) + { + const char *str_value = value ? "true" : "false"; + Arg::StringValue<char> str = {str_value, std::strlen(str_value)}; + writer_.write_str(str, spec_); + } + + void write(const char *value) + { + Arg::StringValue<char> str = {value, value ? std::strlen(value) : 0}; + writer_.write_str(str, spec_); + } + +public: + typedef Spec SpecType; + + ArgFormatterBase(BasicWriter<Char> &w, Spec &s) + : writer_(w) + , spec_(s) + { + } + + template<typename T> + void visit_any_int(T value) + { + writer_.write_int(value, spec_); + } + + template<typename T> + void visit_any_double(T value) + { + writer_.write_double(value, spec_); + } + + void visit_bool(bool value) + { + if (spec_.type_) + { + visit_any_int(value); + return; + } + write(value); + } + + void visit_char(int value) + { + if (spec_.type_ && spec_.type_ != 'c') + { + spec_.flags_ |= CHAR_FLAG; + writer_.write_int(value, spec_); + return; + } + if (spec_.align_ == ALIGN_NUMERIC || spec_.flags_ != 0) + FMT_THROW(FormatError("invalid format specifier for char")); + typedef typename BasicWriter<Char>::CharPtr CharPtr; + Char fill = internal::CharTraits<Char>::cast(spec_.fill()); + CharPtr out = CharPtr(); + const unsigned CHAR_SIZE = 1; + if (spec_.width_ > CHAR_SIZE) + { + out = writer_.grow_buffer(spec_.width_); + if (spec_.align_ == ALIGN_RIGHT) + { + std::uninitialized_fill_n(out, spec_.width_ - CHAR_SIZE, fill); + out += spec_.width_ - CHAR_SIZE; + } + else if (spec_.align_ == ALIGN_CENTER) + { + out = writer_.fill_padding(out, spec_.width_, internal::const_check(CHAR_SIZE), fill); + } + else + { + std::uninitialized_fill_n(out + CHAR_SIZE, spec_.width_ - CHAR_SIZE, fill); + } + } + else + { + out = writer_.grow_buffer(CHAR_SIZE); + } + *out = internal::CharTraits<Char>::cast(value); + } + + void visit_cstring(const char *value) + { + if (spec_.type_ == 'p') + return write_pointer(value); + write(value); + } + + // Qualification with "internal" here and below is a workaround for nvcc. + void visit_string(internal::Arg::StringValue<char> value) + { + writer_.write_str(value, spec_); + } + + using ArgVisitor<Impl, void>::visit_wstring; + + void visit_wstring(internal::Arg::StringValue<Char> value) + { + writer_.write_str(value, spec_); + } + + void visit_pointer(const void *value) + { + if (spec_.type_ && spec_.type_ != 'p') + report_unknown_type(spec_.type_, "pointer"); + write_pointer(value); + } +}; + +class FormatterBase +{ +private: + ArgList args_; + int next_arg_index_; + + // Returns the argument with specified index. + FMT_API Arg do_get_arg(unsigned arg_index, const char *&error); + +protected: + const ArgList &args() const + { + return args_; + } + + explicit FormatterBase(const ArgList &args) + { + args_ = args; + next_arg_index_ = 0; + } + + // Returns the next argument. + Arg next_arg(const char *&error) + { + if (next_arg_index_ >= 0) + return do_get_arg(internal::to_unsigned(next_arg_index_++), error); + error = "cannot switch from manual to automatic argument indexing"; + return Arg(); + } + + // Checks if manual indexing is used and returns the argument with + // specified index. + Arg get_arg(unsigned arg_index, const char *&error) + { + return check_no_auto_index(error) ? do_get_arg(arg_index, error) : Arg(); + } + + bool check_no_auto_index(const char *&error) + { + if (next_arg_index_ > 0) + { + error = "cannot switch from automatic to manual argument indexing"; + return false; + } + next_arg_index_ = -1; + return true; + } + + template<typename Char> + void write(BasicWriter<Char> &w, const Char *start, const Char *end) + { + if (start != end) + w << BasicStringRef<Char>(start, internal::to_unsigned(end - start)); + } +}; +} // namespace internal + +/** + \rst + An argument formatter based on the `curiously recurring template pattern + <http://en.wikipedia.org/wiki/Curiously_recurring_template_pattern>`_. + + To use `~fmt::BasicArgFormatter` define a subclass that implements some or + all of the visit methods with the same signatures as the methods in + `~fmt::ArgVisitor`, for example, `~fmt::ArgVisitor::visit_int()`. + Pass the subclass as the *Impl* template parameter. When a formatting + function processes an argument, it will dispatch to a visit method + specific to the argument type. For example, if the argument type is + ``double`` then the `~fmt::ArgVisitor::visit_double()` method of a subclass + will be called. If the subclass doesn't contain a method with this signature, + then a corresponding method of `~fmt::BasicArgFormatter` or its superclass + will be called. + \endrst + */ +template<typename Impl, typename Char, typename Spec = fmt::FormatSpec> +class BasicArgFormatter : public internal::ArgFormatterBase<Impl, Char, Spec> +{ +private: + BasicFormatter<Char, Impl> &formatter_; + const Char *format_; + +public: + /** + \rst + Constructs an argument formatter object. + *formatter* is a reference to the main formatter object, *spec* contains + format specifier information for standard argument types, and *fmt* points + to the part of the format string being parsed for custom argument types. + \endrst + */ + BasicArgFormatter(BasicFormatter<Char, Impl> &formatter, Spec &spec, const Char *fmt) + : internal::ArgFormatterBase<Impl, Char, Spec>(formatter.writer(), spec) + , formatter_(formatter) + , format_(fmt) + { + } + + /** Formats an argument of a custom (user-defined) type. */ + void visit_custom(internal::Arg::CustomValue c) + { + c.format(&formatter_, c.value, &format_); + } +}; + +/** The default argument formatter. */ +template<typename Char> +class ArgFormatter : public BasicArgFormatter<ArgFormatter<Char>, Char, FormatSpec> +{ +public: + /** Constructs an argument formatter object. */ + ArgFormatter(BasicFormatter<Char> &formatter, FormatSpec &spec, const Char *fmt) + : BasicArgFormatter<ArgFormatter<Char>, Char, FormatSpec>(formatter, spec, fmt) + { + } +}; + +/** This template formats data and writes the output to a writer. */ +template<typename CharType, typename ArgFormatter> +class BasicFormatter : private internal::FormatterBase +{ +public: + /** The character type for the output. */ + typedef CharType Char; + +private: + BasicWriter<Char> &writer_; + internal::ArgMap<Char> map_; + + FMT_DISALLOW_COPY_AND_ASSIGN(BasicFormatter); + + using internal::FormatterBase::get_arg; + + // Checks if manual indexing is used and returns the argument with + // specified name. + internal::Arg get_arg(BasicStringRef<Char> arg_name, const char *&error); + + // Parses argument index and returns corresponding argument. + internal::Arg parse_arg_index(const Char *&s); + + // Parses argument name and returns corresponding argument. + internal::Arg parse_arg_name(const Char *&s); + +public: + /** + \rst + Constructs a ``BasicFormatter`` object. References to the arguments and + the writer are stored in the formatter object so make sure they have + appropriate lifetimes. + \endrst + */ + BasicFormatter(const ArgList &args, BasicWriter<Char> &w) + : internal::FormatterBase(args) + , writer_(w) + { + } + + /** Returns a reference to the writer associated with this formatter. */ + BasicWriter<Char> &writer() + { + return writer_; + } + + /** Formats stored arguments and writes the output to the writer. */ + void format(BasicCStringRef<Char> format_str); + + // Formats a single argument and advances format_str, a format string pointer. + const Char *format(const Char *&format_str, const internal::Arg &arg); +}; + +// Generates a comma-separated list with results of applying f to +// numbers 0..n-1. +#define FMT_GEN(n, f) FMT_GEN##n(f) +#define FMT_GEN1(f) f(0) +#define FMT_GEN2(f) FMT_GEN1(f), f(1) +#define FMT_GEN3(f) FMT_GEN2(f), f(2) +#define FMT_GEN4(f) FMT_GEN3(f), f(3) +#define FMT_GEN5(f) FMT_GEN4(f), f(4) +#define FMT_GEN6(f) FMT_GEN5(f), f(5) +#define FMT_GEN7(f) FMT_GEN6(f), f(6) +#define FMT_GEN8(f) FMT_GEN7(f), f(7) +#define FMT_GEN9(f) FMT_GEN8(f), f(8) +#define FMT_GEN10(f) FMT_GEN9(f), f(9) +#define FMT_GEN11(f) FMT_GEN10(f), f(10) +#define FMT_GEN12(f) FMT_GEN11(f), f(11) +#define FMT_GEN13(f) FMT_GEN12(f), f(12) +#define FMT_GEN14(f) FMT_GEN13(f), f(13) +#define FMT_GEN15(f) FMT_GEN14(f), f(14) + +namespace internal { +inline uint64_t make_type() +{ + return 0; +} + +template<typename T> +inline uint64_t make_type(const T &arg) +{ + return MakeValue<BasicFormatter<char>>::type(arg); +} + +template<std::size_t N, bool /*IsPacked*/ = (N < ArgList::MAX_PACKED_ARGS)> +struct ArgArray; + +template<std::size_t N> +struct ArgArray<N, true /*IsPacked*/> +{ + // '+' is used to silence GCC -Wduplicated-branches warning. + typedef Value Type[N > 0 ? N : +1]; + + template<typename Formatter, typename T> + static Value make(const T &value) + { +#ifdef __clang__ + Value result = MakeValue<Formatter>(value); + // Workaround a bug in Apple LLVM version 4.2 (clang-425.0.28) of clang: + // https://github.com/fmtlib/fmt/issues/276 + (void)result.custom.format; + return result; +#else + return MakeValue<Formatter>(value); +#endif + } +}; + +template<std::size_t N> +struct ArgArray<N, false /*IsPacked*/> +{ + typedef Arg Type[N + 1]; // +1 for the list end Arg::NONE + + template<typename Formatter, typename T> + static Arg make(const T &value) + { + return MakeArg<Formatter>(value); + } +}; + +#if FMT_USE_VARIADIC_TEMPLATES +template<typename Arg, typename... Args> +inline uint64_t make_type(const Arg &first, const Args &... tail) +{ + return make_type(first) | (make_type(tail...) << 4); +} + +#else + +struct ArgType +{ + uint64_t type; + + ArgType() + : type(0) + { + } + + template<typename T> + ArgType(const T &arg) + : type(make_type(arg)) + { + } +}; + +#define FMT_ARG_TYPE_DEFAULT(n) ArgType t##n = ArgType() + +inline uint64_t make_type(FMT_GEN15(FMT_ARG_TYPE_DEFAULT)) +{ + return t0.type | (t1.type << 4) | (t2.type << 8) | (t3.type << 12) | (t4.type << 16) | (t5.type << 20) | (t6.type << 24) | + (t7.type << 28) | (t8.type << 32) | (t9.type << 36) | (t10.type << 40) | (t11.type << 44) | (t12.type << 48) | (t13.type << 52) | + (t14.type << 56); +} +#endif +} // namespace internal + +#define FMT_MAKE_TEMPLATE_ARG(n) typename T##n +#define FMT_MAKE_ARG_TYPE(n) T##n +#define FMT_MAKE_ARG(n) const T##n &v##n +#define FMT_ASSIGN_char(n) arr[n] = fmt::internal::MakeValue<fmt::BasicFormatter<char>>(v##n) +#define FMT_ASSIGN_wchar_t(n) arr[n] = fmt::internal::MakeValue<fmt::BasicFormatter<wchar_t>>(v##n) + +#if FMT_USE_VARIADIC_TEMPLATES +// Defines a variadic function returning void. +#define FMT_VARIADIC_VOID(func, arg_type) \ + template<typename... Args> \ + void func(arg_type arg0, const Args &... args) \ + { \ + typedef fmt::internal::ArgArray<sizeof...(Args)> ArgArray; \ + typename ArgArray::Type array{ArgArray::template make<fmt::BasicFormatter<Char>>(args)...}; \ + func(arg0, fmt::ArgList(fmt::internal::make_type(args...), array)); \ + } + +// Defines a variadic constructor. +#define FMT_VARIADIC_CTOR(ctor, func, arg0_type, arg1_type) \ + template<typename... Args> \ + ctor(arg0_type arg0, arg1_type arg1, const Args &... args) \ + { \ + typedef fmt::internal::ArgArray<sizeof...(Args)> ArgArray; \ + typename ArgArray::Type array{ArgArray::template make<fmt::BasicFormatter<Char>>(args)...}; \ + func(arg0, arg1, fmt::ArgList(fmt::internal::make_type(args...), array)); \ + } + +#else + +#define FMT_MAKE_REF(n) fmt::internal::MakeValue<fmt::BasicFormatter<Char>>(v##n) +#define FMT_MAKE_REF2(n) v##n + +// Defines a wrapper for a function taking one argument of type arg_type +// and n additional arguments of arbitrary types. +#define FMT_WRAP1(func, arg_type, n) \ + template<FMT_GEN(n, FMT_MAKE_TEMPLATE_ARG)> \ + inline void func(arg_type arg1, FMT_GEN(n, FMT_MAKE_ARG)) \ + { \ + const fmt::internal::ArgArray<n>::Type array = {FMT_GEN(n, FMT_MAKE_REF)}; \ + func(arg1, fmt::ArgList(fmt::internal::make_type(FMT_GEN(n, FMT_MAKE_REF2)), array)); \ + } + +// Emulates a variadic function returning void on a pre-C++11 compiler. +#define FMT_VARIADIC_VOID(func, arg_type) \ + inline void func(arg_type arg) \ + { \ + func(arg, fmt::ArgList()); \ + } \ + FMT_WRAP1(func, arg_type, 1) \ + FMT_WRAP1(func, arg_type, 2) \ + FMT_WRAP1(func, arg_type, 3) \ + FMT_WRAP1(func, arg_type, 4) \ + FMT_WRAP1(func, arg_type, 5) \ + FMT_WRAP1(func, arg_type, 6) \ + FMT_WRAP1(func, arg_type, 7) FMT_WRAP1(func, arg_type, 8) FMT_WRAP1(func, arg_type, 9) FMT_WRAP1(func, arg_type, 10) + +#define FMT_CTOR(ctor, func, arg0_type, arg1_type, n) \ + template<FMT_GEN(n, FMT_MAKE_TEMPLATE_ARG)> \ + ctor(arg0_type arg0, arg1_type arg1, FMT_GEN(n, FMT_MAKE_ARG)) \ + { \ + const fmt::internal::ArgArray<n>::Type array = {FMT_GEN(n, FMT_MAKE_REF)}; \ + func(arg0, arg1, fmt::ArgList(fmt::internal::make_type(FMT_GEN(n, FMT_MAKE_REF2)), array)); \ + } + +// Emulates a variadic constructor on a pre-C++11 compiler. +#define FMT_VARIADIC_CTOR(ctor, func, arg0_type, arg1_type) \ + FMT_CTOR(ctor, func, arg0_type, arg1_type, 1) \ + FMT_CTOR(ctor, func, arg0_type, arg1_type, 2) \ + FMT_CTOR(ctor, func, arg0_type, arg1_type, 3) \ + FMT_CTOR(ctor, func, arg0_type, arg1_type, 4) \ + FMT_CTOR(ctor, func, arg0_type, arg1_type, 5) \ + FMT_CTOR(ctor, func, arg0_type, arg1_type, 6) \ + FMT_CTOR(ctor, func, arg0_type, arg1_type, 7) \ + FMT_CTOR(ctor, func, arg0_type, arg1_type, 8) \ + FMT_CTOR(ctor, func, arg0_type, arg1_type, 9) \ + FMT_CTOR(ctor, func, arg0_type, arg1_type, 10) +#endif + +// Generates a comma-separated list with results of applying f to pairs +// (argument, index). +#define FMT_FOR_EACH1(f, x0) f(x0, 0) +#define FMT_FOR_EACH2(f, x0, x1) FMT_FOR_EACH1(f, x0), f(x1, 1) +#define FMT_FOR_EACH3(f, x0, x1, x2) FMT_FOR_EACH2(f, x0, x1), f(x2, 2) +#define FMT_FOR_EACH4(f, x0, x1, x2, x3) FMT_FOR_EACH3(f, x0, x1, x2), f(x3, 3) +#define FMT_FOR_EACH5(f, x0, x1, x2, x3, x4) FMT_FOR_EACH4(f, x0, x1, x2, x3), f(x4, 4) +#define FMT_FOR_EACH6(f, x0, x1, x2, x3, x4, x5) FMT_FOR_EACH5(f, x0, x1, x2, x3, x4), f(x5, 5) +#define FMT_FOR_EACH7(f, x0, x1, x2, x3, x4, x5, x6) FMT_FOR_EACH6(f, x0, x1, x2, x3, x4, x5), f(x6, 6) +#define FMT_FOR_EACH8(f, x0, x1, x2, x3, x4, x5, x6, x7) FMT_FOR_EACH7(f, x0, x1, x2, x3, x4, x5, x6), f(x7, 7) +#define FMT_FOR_EACH9(f, x0, x1, x2, x3, x4, x5, x6, x7, x8) FMT_FOR_EACH8(f, x0, x1, x2, x3, x4, x5, x6, x7), f(x8, 8) +#define FMT_FOR_EACH10(f, x0, x1, x2, x3, x4, x5, x6, x7, x8, x9) FMT_FOR_EACH9(f, x0, x1, x2, x3, x4, x5, x6, x7, x8), f(x9, 9) + +/** + An error returned by an operating system or a language runtime, + for example a file opening error. +*/ +class SystemError : public internal::RuntimeError +{ +private: + FMT_API void init(int err_code, CStringRef format_str, ArgList args); + +protected: + int error_code_; + + typedef char Char; // For FMT_VARIADIC_CTOR. + + SystemError() {} + +public: + /** + \rst + Constructs a :class:`fmt::SystemError` object with a description + formatted with `fmt::format_system_error`. *message* and additional + arguments passed into the constructor are formatted similarly to + `fmt::format`. + + **Example**:: + + // This throws a SystemError with the description + // cannot open file 'madeup': No such file or directory + // or similar (system message may vary). + const char *filename = "madeup"; + std::FILE *file = std::fopen(filename, "r"); + if (!file) + throw fmt::SystemError(errno, "cannot open file '{}'", filename); + \endrst + */ + SystemError(int error_code, CStringRef message) + { + init(error_code, message, ArgList()); + } + FMT_DEFAULTED_COPY_CTOR(SystemError) + FMT_VARIADIC_CTOR(SystemError, init, int, CStringRef) + + FMT_API ~SystemError() FMT_DTOR_NOEXCEPT FMT_OVERRIDE; + + int error_code() const + { + return error_code_; + } +}; + +/** + \rst + Formats an error returned by an operating system or a language runtime, + for example a file opening error, and writes it to *out* in the following + form: + + .. parsed-literal:: + *<message>*: *<system-message>* + + where *<message>* is the passed message and *<system-message>* is + the system message corresponding to the error code. + *error_code* is a system error code as given by ``errno``. + If *error_code* is not a valid error code such as -1, the system message + may look like "Unknown error -1" and is platform-dependent. + \endrst + */ +FMT_API void format_system_error(fmt::Writer &out, int error_code, fmt::StringRef message) FMT_NOEXCEPT; + +/** + \rst + This template provides operations for formatting and writing data into + a character stream. The output is stored in a buffer provided by a subclass + such as :class:`fmt::BasicMemoryWriter`. + + You can use one of the following typedefs for common character types: + + +---------+----------------------+ + | Type | Definition | + +=========+======================+ + | Writer | BasicWriter<char> | + +---------+----------------------+ + | WWriter | BasicWriter<wchar_t> | + +---------+----------------------+ + + \endrst + */ +template<typename Char> +class BasicWriter +{ +private: + // Output buffer. + Buffer<Char> &buffer_; + + FMT_DISALLOW_COPY_AND_ASSIGN(BasicWriter); + + typedef typename internal::CharTraits<Char>::CharPtr CharPtr; + +#if FMT_SECURE_SCL + // Returns pointer value. + static Char *get(CharPtr p) + { + return p.base(); + } +#else + static Char *get(Char *p) + { + return p; + } +#endif + + // Fills the padding around the content and returns the pointer to the + // content area. + static CharPtr fill_padding(CharPtr buffer, unsigned total_size, std::size_t content_size, wchar_t fill); + + // Grows the buffer by n characters and returns a pointer to the newly + // allocated area. + CharPtr grow_buffer(std::size_t n) + { + std::size_t size = buffer_.size(); + buffer_.resize(size + n); + return internal::make_ptr(&buffer_[size], n); + } + + // Writes an unsigned decimal integer. + template<typename UInt> + Char *write_unsigned_decimal(UInt value, unsigned prefix_size = 0) + { + unsigned num_digits = internal::count_digits(value); + Char *ptr = get(grow_buffer(prefix_size + num_digits)); + internal::format_decimal(ptr + prefix_size, value, num_digits); + return ptr; + } + + // Writes a decimal integer. + template<typename Int> + void write_decimal(Int value) + { + typedef typename internal::IntTraits<Int>::MainType MainType; + MainType abs_value = static_cast<MainType>(value); + if (internal::is_negative(value)) + { + abs_value = 0 - abs_value; + *write_unsigned_decimal(abs_value, 1) = '-'; + } + else + { + write_unsigned_decimal(abs_value, 0); + } + } + + // Prepare a buffer for integer formatting. + CharPtr prepare_int_buffer(unsigned num_digits, const EmptySpec &, const char *prefix, unsigned prefix_size) + { + unsigned size = prefix_size + num_digits; + CharPtr p = grow_buffer(size); + std::uninitialized_copy(prefix, prefix + prefix_size, p); + return p + size - 1; + } + + template<typename Spec> + CharPtr prepare_int_buffer(unsigned num_digits, const Spec &spec, const char *prefix, unsigned prefix_size); + + // Formats an integer. + template<typename T, typename Spec> + void write_int(T value, Spec spec); + + // Formats a floating-point number (double or long double). + template<typename T, typename Spec> + void write_double(T value, const Spec &spec); + + // Writes a formatted string. + template<typename StrChar> + CharPtr write_str(const StrChar *s, std::size_t size, const AlignSpec &spec); + + template<typename StrChar, typename Spec> + void write_str(const internal::Arg::StringValue<StrChar> &str, const Spec &spec); + + // This following methods are private to disallow writing wide characters + // and strings to a char stream. If you want to print a wide string as a + // pointer as std::ostream does, cast it to const void*. + // Do not implement! + void operator<<(typename internal::WCharHelper<wchar_t, Char>::Unsupported); + void operator<<(typename internal::WCharHelper<const wchar_t *, Char>::Unsupported); + + // Appends floating-point length specifier to the format string. + // The second argument is only used for overload resolution. + void append_float_length(Char *&format_ptr, long double) + { + *format_ptr++ = 'L'; + } + + template<typename T> + void append_float_length(Char *&, T) + { + } + + template<typename Impl, typename Char_, typename Spec_> + friend class internal::ArgFormatterBase; + + template<typename Impl, typename Char_, typename Spec_> + friend class BasicPrintfArgFormatter; + +protected: + /** + Constructs a ``BasicWriter`` object. + */ + explicit BasicWriter(Buffer<Char> &b) + : buffer_(b) + { + } + +public: + /** + \rst + Destroys a ``BasicWriter`` object. + \endrst + */ + virtual ~BasicWriter() {} + + /** + Returns the total number of characters written. + */ + std::size_t size() const + { + return buffer_.size(); + } + + /** + Returns a pointer to the output buffer content. No terminating null + character is appended. + */ + const Char *data() const FMT_NOEXCEPT + { + return &buffer_[0]; + } + + /** + Returns a pointer to the output buffer content with terminating null + character appended. + */ + const Char *c_str() const + { + std::size_t size = buffer_.size(); + buffer_.reserve(size + 1); + buffer_[size] = '\0'; + return &buffer_[0]; + } + + /** + \rst + Returns the content of the output buffer as an `std::string`. + \endrst + */ + std::basic_string<Char> str() const + { + return std::basic_string<Char>(&buffer_[0], buffer_.size()); + } + + /** + \rst + Writes formatted data. + + *args* is an argument list representing arbitrary arguments. + + **Example**:: + + MemoryWriter out; + out.write("Current point:\n"); + out.write("({:+f}, {:+f})", -3.14, 3.14); + + This will write the following output to the ``out`` object: + + .. code-block:: none + + Current point: + (-3.140000, +3.140000) + + The output can be accessed using :func:`data()`, :func:`c_str` or + :func:`str` methods. + + See also :ref:`syntax`. + \endrst + */ + void write(BasicCStringRef<Char> format, ArgList args) + { + BasicFormatter<Char>(args, *this).format(format); + } + FMT_VARIADIC_VOID(write, BasicCStringRef<Char>) + + BasicWriter &operator<<(int value) + { + write_decimal(value); + return *this; + } + BasicWriter &operator<<(unsigned value) + { + return *this << IntFormatSpec<unsigned>(value); + } + BasicWriter &operator<<(long value) + { + write_decimal(value); + return *this; + } + BasicWriter &operator<<(unsigned long value) + { + return *this << IntFormatSpec<unsigned long>(value); + } + BasicWriter &operator<<(LongLong value) + { + write_decimal(value); + return *this; + } + + /** + \rst + Formats *value* and writes it to the stream. + \endrst + */ + BasicWriter &operator<<(ULongLong value) + { + return *this << IntFormatSpec<ULongLong>(value); + } + + BasicWriter &operator<<(double value) + { + write_double(value, FormatSpec()); + return *this; + } + + /** + \rst + Formats *value* using the general format for floating-point numbers + (``'g'``) and writes it to the stream. + \endrst + */ + BasicWriter &operator<<(long double value) + { + write_double(value, FormatSpec()); + return *this; + } + + /** + Writes a character to the stream. + */ + BasicWriter &operator<<(char value) + { + buffer_.push_back(value); + return *this; + } + + BasicWriter &operator<<(typename internal::WCharHelper<wchar_t, Char>::Supported value) + { + buffer_.push_back(value); + return *this; + } + + /** + \rst + Writes *value* to the stream. + \endrst + */ + BasicWriter &operator<<(fmt::BasicStringRef<Char> value) + { + const Char *str = value.data(); + buffer_.append(str, str + value.size()); + return *this; + } + + BasicWriter &operator<<(typename internal::WCharHelper<StringRef, Char>::Supported value) + { + const char *str = value.data(); + buffer_.append(str, str + value.size()); + return *this; + } + + template<typename T, typename Spec, typename FillChar> + BasicWriter &operator<<(IntFormatSpec<T, Spec, FillChar> spec) + { + internal::CharTraits<Char>::convert(FillChar()); + write_int(spec.value(), spec); + return *this; + } + + template<typename StrChar> + BasicWriter &operator<<(const StrFormatSpec<StrChar> &spec) + { + const StrChar *s = spec.str(); + write_str(s, std::char_traits<Char>::length(s), spec); + return *this; + } + + void clear() FMT_NOEXCEPT + { + buffer_.clear(); + } + + Buffer<Char> &buffer() FMT_NOEXCEPT + { + return buffer_; + } +}; + +template<typename Char> +template<typename StrChar> +typename BasicWriter<Char>::CharPtr BasicWriter<Char>::write_str(const StrChar *s, std::size_t size, const AlignSpec &spec) +{ + CharPtr out = CharPtr(); + if (spec.width() > size) + { + out = grow_buffer(spec.width()); + Char fill = internal::CharTraits<Char>::cast(spec.fill()); + if (spec.align() == ALIGN_RIGHT) + { + std::uninitialized_fill_n(out, spec.width() - size, fill); + out += spec.width() - size; + } + else if (spec.align() == ALIGN_CENTER) + { + out = fill_padding(out, spec.width(), size, fill); + } + else + { + std::uninitialized_fill_n(out + size, spec.width() - size, fill); + } + } + else + { + out = grow_buffer(size); + } + std::uninitialized_copy(s, s + size, out); + return out; +} + +template<typename Char> +template<typename StrChar, typename Spec> +void BasicWriter<Char>::write_str(const internal::Arg::StringValue<StrChar> &s, const Spec &spec) +{ + // Check if StrChar is convertible to Char. + internal::CharTraits<Char>::convert(StrChar()); + if (spec.type_ && spec.type_ != 's') + internal::report_unknown_type(spec.type_, "string"); + const StrChar *str_value = s.value; + std::size_t str_size = s.size; + if (str_size == 0) + { + if (!str_value) + { + FMT_THROW(FormatError("string pointer is null")); + } + } + std::size_t precision = static_cast<std::size_t>(spec.precision_); + if (spec.precision_ >= 0 && precision < str_size) + str_size = precision; + write_str(str_value, str_size, spec); +} + +template<typename Char> +typename BasicWriter<Char>::CharPtr BasicWriter<Char>::fill_padding( + CharPtr buffer, unsigned total_size, std::size_t content_size, wchar_t fill) +{ + std::size_t padding = total_size - content_size; + std::size_t left_padding = padding / 2; + Char fill_char = internal::CharTraits<Char>::cast(fill); + std::uninitialized_fill_n(buffer, left_padding, fill_char); + buffer += left_padding; + CharPtr content = buffer; + std::uninitialized_fill_n(buffer + content_size, padding - left_padding, fill_char); + return content; +} + +template<typename Char> +template<typename Spec> +typename BasicWriter<Char>::CharPtr BasicWriter<Char>::prepare_int_buffer( + unsigned num_digits, const Spec &spec, const char *prefix, unsigned prefix_size) +{ + unsigned width = spec.width(); + Alignment align = spec.align(); + Char fill = internal::CharTraits<Char>::cast(spec.fill()); + if (spec.precision() > static_cast<int>(num_digits)) + { + // Octal prefix '0' is counted as a digit, so ignore it if precision + // is specified. + if (prefix_size > 0 && prefix[prefix_size - 1] == '0') + --prefix_size; + unsigned number_size = prefix_size + internal::to_unsigned(spec.precision()); + AlignSpec subspec(number_size, '0', ALIGN_NUMERIC); + if (number_size >= width) + return prepare_int_buffer(num_digits, subspec, prefix, prefix_size); + buffer_.reserve(width); + unsigned fill_size = width - number_size; + if (align != ALIGN_LEFT) + { + CharPtr p = grow_buffer(fill_size); + std::uninitialized_fill(p, p + fill_size, fill); + } + CharPtr result = prepare_int_buffer(num_digits, subspec, prefix, prefix_size); + if (align == ALIGN_LEFT) + { + CharPtr p = grow_buffer(fill_size); + std::uninitialized_fill(p, p + fill_size, fill); + } + return result; + } + unsigned size = prefix_size + num_digits; + if (width <= size) + { + CharPtr p = grow_buffer(size); + std::uninitialized_copy(prefix, prefix + prefix_size, p); + return p + size - 1; + } + CharPtr p = grow_buffer(width); + CharPtr end = p + width; + if (align == ALIGN_LEFT) + { + std::uninitialized_copy(prefix, prefix + prefix_size, p); + p += size; + std::uninitialized_fill(p, end, fill); + } + else if (align == ALIGN_CENTER) + { + p = fill_padding(p, width, size, fill); + std::uninitialized_copy(prefix, prefix + prefix_size, p); + p += size; + } + else + { + if (align == ALIGN_NUMERIC) + { + if (prefix_size != 0) + { + p = std::uninitialized_copy(prefix, prefix + prefix_size, p); + size -= prefix_size; + } + } + else + { + std::uninitialized_copy(prefix, prefix + prefix_size, end - size); + } + std::uninitialized_fill(p, end - size, fill); + p = end; + } + return p - 1; +} + +template<typename Char> +template<typename T, typename Spec> +void BasicWriter<Char>::write_int(T value, Spec spec) +{ + unsigned prefix_size = 0; + typedef typename internal::IntTraits<T>::MainType UnsignedType; + UnsignedType abs_value = static_cast<UnsignedType>(value); + char prefix[4] = ""; + if (internal::is_negative(value)) + { + prefix[0] = '-'; + ++prefix_size; + abs_value = 0 - abs_value; + } + else if (spec.flag(SIGN_FLAG)) + { + prefix[0] = spec.flag(PLUS_FLAG) ? '+' : ' '; + ++prefix_size; + } + switch (spec.type()) + { + case 0: + case 'd': + { + unsigned num_digits = internal::count_digits(abs_value); + CharPtr p = prepare_int_buffer(num_digits, spec, prefix, prefix_size) + 1; + internal::format_decimal(get(p), abs_value, 0); + break; + } + case 'x': + case 'X': + { + UnsignedType n = abs_value; + if (spec.flag(HASH_FLAG)) + { + prefix[prefix_size++] = '0'; + prefix[prefix_size++] = spec.type_prefix(); + } + unsigned num_digits = 0; + do + { + ++num_digits; + } while ((n >>= 4) != 0); + Char *p = get(prepare_int_buffer(num_digits, spec, prefix, prefix_size)); + n = abs_value; + const char *digits = spec.type() == 'x' ? "0123456789abcdef" : "0123456789ABCDEF"; + do + { + *p-- = digits[n & 0xf]; + } while ((n >>= 4) != 0); + break; + } + case 'b': + case 'B': + { + UnsignedType n = abs_value; + if (spec.flag(HASH_FLAG)) + { + prefix[prefix_size++] = '0'; + prefix[prefix_size++] = spec.type_prefix(); + } + unsigned num_digits = 0; + do + { + ++num_digits; + } while ((n >>= 1) != 0); + Char *p = get(prepare_int_buffer(num_digits, spec, prefix, prefix_size)); + n = abs_value; + do + { + *p-- = static_cast<Char>('0' + (n & 1)); + } while ((n >>= 1) != 0); + break; + } + case 'o': + { + UnsignedType n = abs_value; + if (spec.flag(HASH_FLAG)) + prefix[prefix_size++] = '0'; + unsigned num_digits = 0; + do + { + ++num_digits; + } while ((n >>= 3) != 0); + Char *p = get(prepare_int_buffer(num_digits, spec, prefix, prefix_size)); + n = abs_value; + do + { + *p-- = static_cast<Char>('0' + (n & 7)); + } while ((n >>= 3) != 0); + break; + } + case 'n': + { + unsigned num_digits = internal::count_digits(abs_value); + fmt::StringRef sep = ""; +#if !(defined(ANDROID) || defined(__ANDROID__)) + sep = internal::thousands_sep(std::localeconv()); +#endif + unsigned size = static_cast<unsigned>(num_digits + sep.size() * ((num_digits - 1) / 3)); + CharPtr p = prepare_int_buffer(size, spec, prefix, prefix_size) + 1; + internal::format_decimal(get(p), abs_value, 0, internal::ThousandsSep(sep)); + break; + } + default: + internal::report_unknown_type(spec.type(), spec.flag(CHAR_FLAG) ? "char" : "integer"); + break; + } +} + +template<typename Char> +template<typename T, typename Spec> +void BasicWriter<Char>::write_double(T value, const Spec &spec) +{ + // Check type. + char type = spec.type(); + bool upper = false; + switch (type) + { + case 0: + type = 'g'; + break; + case 'e': + case 'f': + case 'g': + case 'a': + break; + case 'F': +#if FMT_MSC_VER + // MSVC's printf doesn't support 'F'. + type = 'f'; +#endif + // Fall through. + case 'E': + case 'G': + case 'A': + upper = true; + break; + default: + internal::report_unknown_type(type, "double"); + break; + } + + char sign = 0; + // Use isnegative instead of value < 0 because the latter is always + // false for NaN. + if (internal::FPUtil::isnegative(static_cast<double>(value))) + { + sign = '-'; + value = -value; + } + else if (spec.flag(SIGN_FLAG)) + { + sign = spec.flag(PLUS_FLAG) ? '+' : ' '; + } + + if (internal::FPUtil::isnotanumber(value)) + { + // Format NaN ourselves because sprintf's output is not consistent + // across platforms. + std::size_t nan_size = 4; + const char *nan = upper ? " NAN" : " nan"; + if (!sign) + { + --nan_size; + ++nan; + } + CharPtr out = write_str(nan, nan_size, spec); + if (sign) + *out = sign; + return; + } + + if (internal::FPUtil::isinfinity(value)) + { + // Format infinity ourselves because sprintf's output is not consistent + // across platforms. + std::size_t inf_size = 4; + const char *inf = upper ? " INF" : " inf"; + if (!sign) + { + --inf_size; + ++inf; + } + CharPtr out = write_str(inf, inf_size, spec); + if (sign) + *out = sign; + return; + } + + std::size_t offset = buffer_.size(); + unsigned width = spec.width(); + if (sign) + { + buffer_.reserve(buffer_.size() + (width > 1u ? width : 1u)); + if (width > 0) + --width; + ++offset; + } + + // Build format string. + enum + { + MAX_FORMAT_SIZE = 10 + }; // longest format: %#-*.*Lg + Char format[MAX_FORMAT_SIZE]; + Char *format_ptr = format; + *format_ptr++ = '%'; + unsigned width_for_sprintf = width; + if (spec.flag(HASH_FLAG)) + *format_ptr++ = '#'; + if (spec.align() == ALIGN_CENTER) + { + width_for_sprintf = 0; + } + else + { + if (spec.align() == ALIGN_LEFT) + *format_ptr++ = '-'; + if (width != 0) + *format_ptr++ = '*'; + } + if (spec.precision() >= 0) + { + *format_ptr++ = '.'; + *format_ptr++ = '*'; + } + + append_float_length(format_ptr, value); + *format_ptr++ = type; + *format_ptr = '\0'; + + // Format using snprintf. + Char fill = internal::CharTraits<Char>::cast(spec.fill()); + unsigned n = 0; + Char *start = FMT_NULL; + for (;;) + { + std::size_t buffer_size = buffer_.capacity() - offset; +#if FMT_MSC_VER + // MSVC's vsnprintf_s doesn't work with zero size, so reserve + // space for at least one extra character to make the size non-zero. + // Note that the buffer's capacity will increase by more than 1. + if (buffer_size == 0) + { + buffer_.reserve(offset + 1); + buffer_size = buffer_.capacity() - offset; + } +#endif + start = &buffer_[offset]; + int result = internal::CharTraits<Char>::format_float(start, buffer_size, format, width_for_sprintf, spec.precision(), value); + if (result >= 0) + { + n = internal::to_unsigned(result); + if (offset + n < buffer_.capacity()) + break; // The buffer is large enough - continue with formatting. + buffer_.reserve(offset + n + 1); + } + else + { + // If result is negative we ask to increase the capacity by at least 1, + // but as std::vector, the buffer grows exponentially. + buffer_.reserve(buffer_.capacity() + 1); + } + } + if (sign) + { + if ((spec.align() != ALIGN_RIGHT && spec.align() != ALIGN_DEFAULT) || *start != ' ') + { + *(start - 1) = sign; + sign = 0; + } + else + { + *(start - 1) = fill; + } + ++n; + } + if (spec.align() == ALIGN_CENTER && spec.width() > n) + { + width = spec.width(); + CharPtr p = grow_buffer(width); + std::memmove(get(p) + (width - n) / 2, get(p), n * sizeof(Char)); + fill_padding(p, spec.width(), n, fill); + return; + } + if (spec.fill() != ' ' || sign) + { + while (*start == ' ') + *start++ = fill; + if (sign) + *(start - 1) = sign; + } + grow_buffer(n); +} + +/** + \rst + This class template provides operations for formatting and writing data + into a character stream. The output is stored in a memory buffer that grows + dynamically. + + You can use one of the following typedefs for common character types + and the standard allocator: + + +---------------+-----------------------------------------------------+ + | Type | Definition | + +===============+=====================================================+ + | MemoryWriter | BasicMemoryWriter<char, std::allocator<char>> | + +---------------+-----------------------------------------------------+ + | WMemoryWriter | BasicMemoryWriter<wchar_t, std::allocator<wchar_t>> | + +---------------+-----------------------------------------------------+ + + **Example**:: + + MemoryWriter out; + out << "The answer is " << 42 << "\n"; + out.write("({:+f}, {:+f})", -3.14, 3.14); + + This will write the following output to the ``out`` object: + + .. code-block:: none + + The answer is 42 + (-3.140000, +3.140000) + + The output can be converted to an ``std::string`` with ``out.str()`` or + accessed as a C string with ``out.c_str()``. + \endrst + */ +template<typename Char, typename Allocator = std::allocator<Char>> +class BasicMemoryWriter : public BasicWriter<Char> +{ +private: + internal::MemoryBuffer<Char, internal::INLINE_BUFFER_SIZE, Allocator> buffer_; + +public: + explicit BasicMemoryWriter(const Allocator &alloc = Allocator()) + : BasicWriter<Char>(buffer_) + , buffer_(alloc) + { + } + +#if FMT_USE_RVALUE_REFERENCES + /** + \rst + Constructs a :class:`fmt::BasicMemoryWriter` object moving the content + of the other object to it. + \endrst + */ + BasicMemoryWriter(BasicMemoryWriter &&other) + : BasicWriter<Char>(buffer_) + , buffer_(std::move(other.buffer_)) + { + } + + /** + \rst + Moves the content of the other ``BasicMemoryWriter`` object to this one. + \endrst + */ + BasicMemoryWriter &operator=(BasicMemoryWriter &&other) + { + buffer_ = std::move(other.buffer_); + return *this; + } +#endif +}; + +typedef BasicMemoryWriter<char> MemoryWriter; +typedef BasicMemoryWriter<wchar_t> WMemoryWriter; + +/** + \rst + This class template provides operations for formatting and writing data + into a fixed-size array. For writing into a dynamically growing buffer + use :class:`fmt::BasicMemoryWriter`. + + Any write method will throw ``std::runtime_error`` if the output doesn't fit + into the array. + + You can use one of the following typedefs for common character types: + + +--------------+---------------------------+ + | Type | Definition | + +==============+===========================+ + | ArrayWriter | BasicArrayWriter<char> | + +--------------+---------------------------+ + | WArrayWriter | BasicArrayWriter<wchar_t> | + +--------------+---------------------------+ + \endrst + */ +template<typename Char> +class BasicArrayWriter : public BasicWriter<Char> +{ +private: + internal::FixedBuffer<Char> buffer_; + +public: + /** + \rst + Constructs a :class:`fmt::BasicArrayWriter` object for *array* of the + given size. + \endrst + */ + BasicArrayWriter(Char *array, std::size_t size) + : BasicWriter<Char>(buffer_) + , buffer_(array, size) + { + } + + /** + \rst + Constructs a :class:`fmt::BasicArrayWriter` object for *array* of the + size known at compile time. + \endrst + */ + template<std::size_t SIZE> + explicit BasicArrayWriter(Char (&array)[SIZE]) + : BasicWriter<Char>(buffer_) + , buffer_(array, SIZE) + { + } +}; + +typedef BasicArrayWriter<char> ArrayWriter; +typedef BasicArrayWriter<wchar_t> WArrayWriter; + +// Reports a system error without throwing an exception. +// Can be used to report errors from destructors. +FMT_API void report_system_error(int error_code, StringRef message) FMT_NOEXCEPT; + +#if FMT_USE_WINDOWS_H + +/** A Windows error. */ +class WindowsError : public SystemError +{ +private: + FMT_API void init(int error_code, CStringRef format_str, ArgList args); + +public: + /** + \rst + Constructs a :class:`fmt::WindowsError` object with the description + of the form + + .. parsed-literal:: + *<message>*: *<system-message>* + + where *<message>* is the formatted message and *<system-message>* is the + system message corresponding to the error code. + *error_code* is a Windows error code as given by ``GetLastError``. + If *error_code* is not a valid error code such as -1, the system message + will look like "error -1". + + **Example**:: + + // This throws a WindowsError with the description + // cannot open file 'madeup': The system cannot find the file specified. + // or similar (system message may vary). + const char *filename = "madeup"; + LPOFSTRUCT of = LPOFSTRUCT(); + HFILE file = OpenFile(filename, &of, OF_READ); + if (file == HFILE_ERROR) { + throw fmt::WindowsError(GetLastError(), + "cannot open file '{}'", filename); + } + \endrst + */ + WindowsError(int error_code, CStringRef message) + { + init(error_code, message, ArgList()); + } + FMT_VARIADIC_CTOR(WindowsError, init, int, CStringRef) +}; + +// Reports a Windows error without throwing an exception. +// Can be used to report errors from destructors. +FMT_API void report_windows_error(int error_code, StringRef message) FMT_NOEXCEPT; + +#endif + +enum Color +{ + BLACK, + RED, + GREEN, + YELLOW, + BLUE, + MAGENTA, + CYAN, + WHITE +}; + +/** + Formats a string and prints it to stdout using ANSI escape sequences + to specify color (experimental). + Example: + print_colored(fmt::RED, "Elapsed time: {0:.2f} seconds", 1.23); + */ +FMT_API void print_colored(Color c, CStringRef format, ArgList args); + +/** + \rst + Formats arguments and returns the result as a string. + + **Example**:: + + std::string message = format("The answer is {}", 42); + \endrst +*/ +inline std::string format(CStringRef format_str, ArgList args) +{ + MemoryWriter w; + w.write(format_str, args); + return w.str(); +} + +inline std::wstring format(WCStringRef format_str, ArgList args) +{ + WMemoryWriter w; + w.write(format_str, args); + return w.str(); +} + +/** + \rst + Prints formatted data to the file *f*. + + **Example**:: + + print(stderr, "Don't {}!", "panic"); + \endrst + */ +FMT_API void print(std::FILE *f, CStringRef format_str, ArgList args); + +/** + \rst + Prints formatted data to ``stdout``. + + **Example**:: + + print("Elapsed time: {0:.2f} seconds", 1.23); + \endrst + */ +FMT_API void print(CStringRef format_str, ArgList args); + +/** + Fast integer formatter. + */ +class FormatInt +{ +private: + // Buffer should be large enough to hold all digits (digits10 + 1), + // a sign and a null character. + enum + { + BUFFER_SIZE = std::numeric_limits<ULongLong>::digits10 + 3 + }; + mutable char buffer_[BUFFER_SIZE]; + char *str_; + + // Formats value in reverse and returns the number of digits. + char *format_decimal(ULongLong value) + { + char *buffer_end = buffer_ + BUFFER_SIZE - 1; + while (value >= 100) + { + // Integer division is slow so do it for a group of two digits instead + // of for every digit. The idea comes from the talk by Alexandrescu + // "Three Optimization Tips for C++". See speed-test for a comparison. + unsigned index = static_cast<unsigned>((value % 100) * 2); + value /= 100; + *--buffer_end = internal::Data::DIGITS[index + 1]; + *--buffer_end = internal::Data::DIGITS[index]; + } + if (value < 10) + { + *--buffer_end = static_cast<char>('0' + value); + return buffer_end; + } + unsigned index = static_cast<unsigned>(value * 2); + *--buffer_end = internal::Data::DIGITS[index + 1]; + *--buffer_end = internal::Data::DIGITS[index]; + return buffer_end; + } + + void FormatSigned(LongLong value) + { + ULongLong abs_value = static_cast<ULongLong>(value); + bool negative = value < 0; + if (negative) + abs_value = 0 - abs_value; + str_ = format_decimal(abs_value); + if (negative) + *--str_ = '-'; + } + +public: + explicit FormatInt(int value) + { + FormatSigned(value); + } + explicit FormatInt(long value) + { + FormatSigned(value); + } + explicit FormatInt(LongLong value) + { + FormatSigned(value); + } + explicit FormatInt(unsigned value) + : str_(format_decimal(value)) + { + } + explicit FormatInt(unsigned long value) + : str_(format_decimal(value)) + { + } + explicit FormatInt(ULongLong value) + : str_(format_decimal(value)) + { + } + + /** Returns the number of characters written to the output buffer. */ + std::size_t size() const + { + return internal::to_unsigned(buffer_ - str_ + BUFFER_SIZE - 1); + } + + /** + Returns a pointer to the output buffer content. No terminating null + character is appended. + */ + const char *data() const + { + return str_; + } + + /** + Returns a pointer to the output buffer content with terminating null + character appended. + */ + const char *c_str() const + { + buffer_[BUFFER_SIZE - 1] = '\0'; + return str_; + } + + /** + \rst + Returns the content of the output buffer as an ``std::string``. + \endrst + */ + std::string str() const + { + return std::string(str_, size()); + } +}; + +// Formats a decimal integer value writing into buffer and returns +// a pointer to the end of the formatted string. This function doesn't +// write a terminating null character. +template<typename T> +inline void format_decimal(char *&buffer, T value) +{ + typedef typename internal::IntTraits<T>::MainType MainType; + MainType abs_value = static_cast<MainType>(value); + if (internal::is_negative(value)) + { + *buffer++ = '-'; + abs_value = 0 - abs_value; + } + if (abs_value < 100) + { + if (abs_value < 10) + { + *buffer++ = static_cast<char>('0' + abs_value); + return; + } + unsigned index = static_cast<unsigned>(abs_value * 2); + *buffer++ = internal::Data::DIGITS[index]; + *buffer++ = internal::Data::DIGITS[index + 1]; + return; + } + unsigned num_digits = internal::count_digits(abs_value); + internal::format_decimal(buffer, abs_value, num_digits); + buffer += num_digits; +} + +/** + \rst + Returns a named argument for formatting functions. + + **Example**:: + + print("Elapsed time: {s:.2f} seconds", arg("s", 1.23)); + + \endrst + */ +template<typename T> +inline internal::NamedArgWithType<char, T> arg(StringRef name, const T &arg) +{ + return internal::NamedArgWithType<char, T>(name, arg); +} + +template<typename T> +inline internal::NamedArgWithType<wchar_t, T> arg(WStringRef name, const T &arg) +{ + return internal::NamedArgWithType<wchar_t, T>(name, arg); +} + +// The following two functions are deleted intentionally to disable +// nested named arguments as in ``format("{}", arg("a", arg("b", 42)))``. +template<typename Char> +void arg(StringRef, const internal::NamedArg<Char> &) FMT_DELETED_OR_UNDEFINED; +template<typename Char> +void arg(WStringRef, const internal::NamedArg<Char> &) FMT_DELETED_OR_UNDEFINED; +} // namespace fmt + +#if FMT_GCC_VERSION +// Use the system_header pragma to suppress warnings about variadic macros +// because suppressing -Wvariadic-macros with the diagnostic pragma doesn't +// work. It is used at the end because we want to suppress as little warnings +// as possible. +#pragma GCC system_header +#endif + +// This is used to work around VC++ bugs in handling variadic macros. +#define FMT_EXPAND(args) args + +// Returns the number of arguments. +// Based on https://groups.google.com/forum/#!topic/comp.std.c/d-6Mj5Lko_s. +#define FMT_NARG(...) FMT_NARG_(__VA_ARGS__, FMT_RSEQ_N()) +#define FMT_NARG_(...) FMT_EXPAND(FMT_ARG_N(__VA_ARGS__)) +#define FMT_ARG_N(_1, _2, _3, _4, _5, _6, _7, _8, _9, _10, N, ...) N +#define FMT_RSEQ_N() 10, 9, 8, 7, 6, 5, 4, 3, 2, 1, 0 + +#define FMT_FOR_EACH_(N, f, ...) FMT_EXPAND(FMT_CONCAT(FMT_FOR_EACH, N)(f, __VA_ARGS__)) +#define FMT_FOR_EACH(f, ...) FMT_EXPAND(FMT_FOR_EACH_(FMT_NARG(__VA_ARGS__), f, __VA_ARGS__)) + +#define FMT_ADD_ARG_NAME(type, index) type arg##index +#define FMT_GET_ARG_NAME(type, index) arg##index + +#if FMT_USE_VARIADIC_TEMPLATES +#define FMT_VARIADIC_(Const, Char, ReturnType, func, call, ...) \ + template<typename... Args> \ + ReturnType func(FMT_FOR_EACH(FMT_ADD_ARG_NAME, __VA_ARGS__), const Args &... args) Const \ + { \ + typedef fmt::internal::ArgArray<sizeof...(Args)> ArgArray; \ + typename ArgArray::Type array{ArgArray::template make<fmt::BasicFormatter<Char>>(args)...}; \ + call(FMT_FOR_EACH(FMT_GET_ARG_NAME, __VA_ARGS__), fmt::ArgList(fmt::internal::make_type(args...), array)); \ + } +#else +// Defines a wrapper for a function taking __VA_ARGS__ arguments +// and n additional arguments of arbitrary types. +#define FMT_WRAP(Const, Char, ReturnType, func, call, n, ...) \ + template<FMT_GEN(n, FMT_MAKE_TEMPLATE_ARG)> \ + inline ReturnType func(FMT_FOR_EACH(FMT_ADD_ARG_NAME, __VA_ARGS__), FMT_GEN(n, FMT_MAKE_ARG)) Const \ + { \ + fmt::internal::ArgArray<n>::Type arr; \ + FMT_GEN(n, FMT_ASSIGN_##Char); \ + call(FMT_FOR_EACH(FMT_GET_ARG_NAME, __VA_ARGS__), fmt::ArgList(fmt::internal::make_type(FMT_GEN(n, FMT_MAKE_REF2)), arr)); \ + } + +#define FMT_VARIADIC_(Const, Char, ReturnType, func, call, ...) \ + inline ReturnType func(FMT_FOR_EACH(FMT_ADD_ARG_NAME, __VA_ARGS__)) Const \ + { \ + call(FMT_FOR_EACH(FMT_GET_ARG_NAME, __VA_ARGS__), fmt::ArgList()); \ + } \ + FMT_WRAP(Const, Char, ReturnType, func, call, 1, __VA_ARGS__) \ + FMT_WRAP(Const, Char, ReturnType, func, call, 2, __VA_ARGS__) \ + FMT_WRAP(Const, Char, ReturnType, func, call, 3, __VA_ARGS__) \ + FMT_WRAP(Const, Char, ReturnType, func, call, 4, __VA_ARGS__) \ + FMT_WRAP(Const, Char, ReturnType, func, call, 5, __VA_ARGS__) \ + FMT_WRAP(Const, Char, ReturnType, func, call, 6, __VA_ARGS__) \ + FMT_WRAP(Const, Char, ReturnType, func, call, 7, __VA_ARGS__) \ + FMT_WRAP(Const, Char, ReturnType, func, call, 8, __VA_ARGS__) \ + FMT_WRAP(Const, Char, ReturnType, func, call, 9, __VA_ARGS__) \ + FMT_WRAP(Const, Char, ReturnType, func, call, 10, __VA_ARGS__) \ + FMT_WRAP(Const, Char, ReturnType, func, call, 11, __VA_ARGS__) \ + FMT_WRAP(Const, Char, ReturnType, func, call, 12, __VA_ARGS__) \ + FMT_WRAP(Const, Char, ReturnType, func, call, 13, __VA_ARGS__) \ + FMT_WRAP(Const, Char, ReturnType, func, call, 14, __VA_ARGS__) \ + FMT_WRAP(Const, Char, ReturnType, func, call, 15, __VA_ARGS__) +#endif // FMT_USE_VARIADIC_TEMPLATES + +/** + \rst + Defines a variadic function with the specified return type, function name + and argument types passed as variable arguments to this macro. + + **Example**:: + + void print_error(const char *file, int line, const char *format, + fmt::ArgList args) { + fmt::print("{}: {}: ", file, line); + fmt::print(format, args); + } + FMT_VARIADIC(void, print_error, const char *, int, const char *) + + ``FMT_VARIADIC`` is used for compatibility with legacy C++ compilers that + don't implement variadic templates. You don't have to use this macro if + you don't need legacy compiler support and can use variadic templates + directly:: + + template <typename... Args> + void print_error(const char *file, int line, const char *format, + const Args & ... args) { + fmt::print("{}: {}: ", file, line); + fmt::print(format, args...); + } + \endrst + */ +#define FMT_VARIADIC(ReturnType, func, ...) FMT_VARIADIC_(, char, ReturnType, func, return func, __VA_ARGS__) + +#define FMT_VARIADIC_CONST(ReturnType, func, ...) FMT_VARIADIC_(const, char, ReturnType, func, return func, __VA_ARGS__) + +#define FMT_VARIADIC_W(ReturnType, func, ...) FMT_VARIADIC_(, wchar_t, ReturnType, func, return func, __VA_ARGS__) + +#define FMT_VARIADIC_CONST_W(ReturnType, func, ...) FMT_VARIADIC_(const, wchar_t, ReturnType, func, return func, __VA_ARGS__) + +#define FMT_CAPTURE_ARG_(id, index) ::fmt::arg(#id, id) + +#define FMT_CAPTURE_ARG_W_(id, index) ::fmt::arg(L## #id, id) + +/** + \rst + Convenient macro to capture the arguments' names and values into several + ``fmt::arg(name, value)``. + + **Example**:: + + int x = 1, y = 2; + print("point: ({x}, {y})", FMT_CAPTURE(x, y)); + // same as: + // print("point: ({x}, {y})", arg("x", x), arg("y", y)); + + \endrst + */ +#define FMT_CAPTURE(...) FMT_FOR_EACH(FMT_CAPTURE_ARG_, __VA_ARGS__) + +#define FMT_CAPTURE_W(...) FMT_FOR_EACH(FMT_CAPTURE_ARG_W_, __VA_ARGS__) + +namespace fmt { +FMT_VARIADIC(std::string, format, CStringRef) +FMT_VARIADIC_W(std::wstring, format, WCStringRef) +FMT_VARIADIC(void, print, CStringRef) +FMT_VARIADIC(void, print, std::FILE *, CStringRef) +FMT_VARIADIC(void, print_colored, Color, CStringRef) + +namespace internal { +template<typename Char> +inline bool is_name_start(Char c) +{ + return ('a' <= c && c <= 'z') || ('A' <= c && c <= 'Z') || '_' == c; +} + +// Parses an unsigned integer advancing s to the end of the parsed input. +// This function assumes that the first character of s is a digit. +template<typename Char> +unsigned parse_nonnegative_int(const Char *&s) +{ + assert('0' <= *s && *s <= '9'); + unsigned value = 0; + // 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 + (*s - '0'); + ++s; + } while ('0' <= *s && *s <= '9'); + // Convert to unsigned to prevent a warning. + if (value > max_int) + FMT_THROW(FormatError("number is too big")); + return value; +} + +inline void require_numeric_argument(const Arg &arg, char spec) +{ + if (arg.type > Arg::LAST_NUMERIC_TYPE) + { + std::string message = fmt::format("format specifier '{}' requires numeric argument", spec); + FMT_THROW(fmt::FormatError(message)); + } +} + +template<typename Char> +void check_sign(const Char *&s, const Arg &arg) +{ + char sign = static_cast<char>(*s); + require_numeric_argument(arg, sign); + if (arg.type == Arg::UINT || arg.type == Arg::ULONG_LONG) + { + FMT_THROW(FormatError(fmt::format("format specifier '{}' requires signed argument", sign))); + } + ++s; +} +} // namespace internal + +template<typename Char, typename AF> +inline internal::Arg BasicFormatter<Char, AF>::get_arg(BasicStringRef<Char> arg_name, const char *&error) +{ + if (check_no_auto_index(error)) + { + map_.init(args()); + const internal::Arg *arg = map_.find(arg_name); + if (arg) + return *arg; + error = "argument not found"; + } + return internal::Arg(); +} + +template<typename Char, typename AF> +inline internal::Arg BasicFormatter<Char, AF>::parse_arg_index(const Char *&s) +{ + const char *error = FMT_NULL; + internal::Arg arg = *s < '0' || *s > '9' ? next_arg(error) : get_arg(internal::parse_nonnegative_int(s), error); + if (error) + { + FMT_THROW(FormatError(*s != '}' && *s != ':' ? "invalid format string" : error)); + } + return arg; +} + +template<typename Char, typename AF> +inline internal::Arg BasicFormatter<Char, AF>::parse_arg_name(const Char *&s) +{ + assert(internal::is_name_start(*s)); + const Char *start = s; + Char c; + do + { + c = *++s; + } while (internal::is_name_start(c) || ('0' <= c && c <= '9')); + const char *error = FMT_NULL; + internal::Arg arg = get_arg(BasicStringRef<Char>(start, s - start), error); + if (error) + FMT_THROW(FormatError(error)); + return arg; +} + +template<typename Char, typename ArgFormatter> +const Char *BasicFormatter<Char, ArgFormatter>::format(const Char *&format_str, const internal::Arg &arg) +{ + using internal::Arg; + const Char *s = format_str; + typename ArgFormatter::SpecType spec; + if (*s == ':') + { + if (arg.type == Arg::CUSTOM) + { + arg.custom.format(this, arg.custom.value, &s); + return s; + } + ++s; + // Parse fill and alignment. + if (Char c = *s) + { + const Char *p = s + 1; + spec.align_ = ALIGN_DEFAULT; + do + { + switch (*p) + { + case '<': + spec.align_ = ALIGN_LEFT; + break; + case '>': + spec.align_ = ALIGN_RIGHT; + break; + case '=': + spec.align_ = ALIGN_NUMERIC; + break; + case '^': + spec.align_ = ALIGN_CENTER; + break; + } + if (spec.align_ != ALIGN_DEFAULT) + { + if (p != s) + { + if (c == '}') + break; + if (c == '{') + FMT_THROW(FormatError("invalid fill character '{'")); + s += 2; + spec.fill_ = c; + } + else + ++s; + if (spec.align_ == ALIGN_NUMERIC) + require_numeric_argument(arg, '='); + break; + } + } while (--p >= s); + } + + // Parse sign. + switch (*s) + { + case '+': + check_sign(s, arg); + spec.flags_ |= SIGN_FLAG | PLUS_FLAG; + break; + case '-': + check_sign(s, arg); + spec.flags_ |= MINUS_FLAG; + break; + case ' ': + check_sign(s, arg); + spec.flags_ |= SIGN_FLAG; + break; + } + + if (*s == '#') + { + require_numeric_argument(arg, '#'); + spec.flags_ |= HASH_FLAG; + ++s; + } + + // Parse zero flag. + if (*s == '0') + { + require_numeric_argument(arg, '0'); + spec.align_ = ALIGN_NUMERIC; + spec.fill_ = '0'; + ++s; + } + + // Parse width. + if ('0' <= *s && *s <= '9') + { + spec.width_ = internal::parse_nonnegative_int(s); + } + else if (*s == '{') + { + ++s; + Arg width_arg = internal::is_name_start(*s) ? parse_arg_name(s) : parse_arg_index(s); + if (*s++ != '}') + FMT_THROW(FormatError("invalid format string")); + ULongLong value = 0; + switch (width_arg.type) + { + case Arg::INT: + if (width_arg.int_value < 0) + FMT_THROW(FormatError("negative width")); + value = width_arg.int_value; + break; + case Arg::UINT: + value = width_arg.uint_value; + break; + case Arg::LONG_LONG: + if (width_arg.long_long_value < 0) + FMT_THROW(FormatError("negative width")); + value = width_arg.long_long_value; + break; + case Arg::ULONG_LONG: + value = width_arg.ulong_long_value; + break; + default: + FMT_THROW(FormatError("width is not integer")); + } + unsigned max_int = (std::numeric_limits<int>::max)(); + if (value > max_int) + FMT_THROW(FormatError("number is too big")); + spec.width_ = static_cast<int>(value); + } + + // Parse precision. + if (*s == '.') + { + ++s; + spec.precision_ = 0; + if ('0' <= *s && *s <= '9') + { + spec.precision_ = internal::parse_nonnegative_int(s); + } + else if (*s == '{') + { + ++s; + Arg precision_arg = internal::is_name_start(*s) ? parse_arg_name(s) : parse_arg_index(s); + if (*s++ != '}') + FMT_THROW(FormatError("invalid format string")); + ULongLong value = 0; + switch (precision_arg.type) + { + case Arg::INT: + if (precision_arg.int_value < 0) + FMT_THROW(FormatError("negative precision")); + value = precision_arg.int_value; + break; + case Arg::UINT: + value = precision_arg.uint_value; + break; + case Arg::LONG_LONG: + if (precision_arg.long_long_value < 0) + FMT_THROW(FormatError("negative precision")); + value = precision_arg.long_long_value; + break; + case Arg::ULONG_LONG: + value = precision_arg.ulong_long_value; + break; + default: + FMT_THROW(FormatError("precision is not integer")); + } + unsigned max_int = (std::numeric_limits<int>::max)(); + if (value > max_int) + FMT_THROW(FormatError("number is too big")); + spec.precision_ = static_cast<int>(value); + } + else + { + FMT_THROW(FormatError("missing precision specifier")); + } + if (arg.type <= Arg::LAST_INTEGER_TYPE || arg.type == Arg::POINTER) + { + FMT_THROW(FormatError( + fmt::format("precision not allowed in {} format specifier", arg.type == Arg::POINTER ? "pointer" : "integer"))); + } + } + + // Parse type. + if (*s != '}' && *s) + spec.type_ = static_cast<char>(*s++); + } + + if (*s++ != '}') + FMT_THROW(FormatError("missing '}' in format string")); + + // Format argument. + ArgFormatter(*this, spec, s - 1).visit(arg); + return s; +} + +template<typename Char, typename AF> +void BasicFormatter<Char, AF>::format(BasicCStringRef<Char> format_str) +{ + const Char *s = format_str.c_str(); + const Char *start = s; + while (*s) + { + Char c = *s++; + if (c != '{' && c != '}') + continue; + if (*s == c) + { + write(writer_, start, s); + start = ++s; + continue; + } + if (c == '}') + FMT_THROW(FormatError("unmatched '}' in format string")); + write(writer_, start, s - 1); + internal::Arg arg = internal::is_name_start(*s) ? parse_arg_name(s) : parse_arg_index(s); + start = s = format(s, arg); + } + write(writer_, start, s); +} + +template<typename Char, typename It> +struct ArgJoin +{ + It first; + It last; + BasicCStringRef<Char> sep; + + ArgJoin(It first, It last, const BasicCStringRef<Char> &sep) + : first(first) + , last(last) + , sep(sep) + { + } +}; + +template<typename It> +ArgJoin<char, It> join(It first, It last, const BasicCStringRef<char> &sep) +{ + return ArgJoin<char, It>(first, last, sep); +} + +template<typename It> +ArgJoin<wchar_t, It> join(It first, It last, const BasicCStringRef<wchar_t> &sep) +{ + return ArgJoin<wchar_t, It>(first, last, sep); +} + +#if FMT_HAS_GXX_CXX11 +template<typename Range> +auto join(const Range &range, const BasicCStringRef<char> &sep) -> ArgJoin<char, decltype(std::begin(range))> +{ + return join(std::begin(range), std::end(range), sep); +} + +template<typename Range> +auto join(const Range &range, const BasicCStringRef<wchar_t> &sep) -> ArgJoin<wchar_t, decltype(std::begin(range))> +{ + return join(std::begin(range), std::end(range), sep); +} +#endif + +template<typename ArgFormatter, typename Char, typename It> +void format_arg(fmt::BasicFormatter<Char, ArgFormatter> &f, const Char *&format_str, const ArgJoin<Char, It> &e) +{ + const Char *end = format_str; + if (*end == ':') + ++end; + while (*end && *end != '}') + ++end; + if (*end != '}') + FMT_THROW(FormatError("missing '}' in format string")); + + It it = e.first; + if (it != e.last) + { + const Char *save = format_str; + f.format(format_str, internal::MakeArg<fmt::BasicFormatter<Char, ArgFormatter>>(*it++)); + while (it != e.last) + { + f.writer().write(e.sep); + format_str = save; + f.format(format_str, internal::MakeArg<fmt::BasicFormatter<Char, ArgFormatter>>(*it++)); + } + } + format_str = end + 1; +} +} // namespace fmt + +#if FMT_USE_USER_DEFINED_LITERALS +namespace fmt { +namespace internal { + +template<typename Char> +struct UdlFormat +{ + const Char *str; + + template<typename... Args> + auto operator()(Args &&... args) const -> decltype(format(str, std::forward<Args>(args)...)) + { + return format(str, std::forward<Args>(args)...); + } +}; + +template<typename Char> +struct UdlArg +{ + const Char *str; + + template<typename T> + NamedArgWithType<Char, T> operator=(T &&value) const + { + return {str, std::forward<T>(value)}; + } +}; + +} // namespace internal + +inline namespace literals { + +/** + \rst + C++11 literal equivalent of :func:`fmt::format`. + + **Example**:: + + using namespace fmt::literals; + std::string message = "The answer is {}"_format(42); + \endrst + */ +inline internal::UdlFormat<char> operator"" _format(const char *s, std::size_t) +{ + return {s}; +} +inline internal::UdlFormat<wchar_t> operator"" _format(const wchar_t *s, std::size_t) +{ + return {s}; +} + +/** + \rst + C++11 literal equivalent of :func:`fmt::arg`. + + **Example**:: + + using namespace fmt::literals; + print("Elapsed time: {s:.2f} seconds", "s"_a=1.23); + \endrst + */ +inline internal::UdlArg<char> operator"" _a(const char *s, std::size_t) +{ + return {s}; +} +inline internal::UdlArg<wchar_t> operator"" _a(const wchar_t *s, std::size_t) +{ + return {s}; +} + +} // namespace literals +} // namespace fmt +#endif // FMT_USE_USER_DEFINED_LITERALS + +// Restore warnings. +#if FMT_GCC_VERSION >= 406 +#pragma GCC diagnostic pop +#endif + +#if defined(__clang__) && !defined(FMT_ICC_VERSION) +#pragma clang diagnostic pop +#endif + +#ifdef FMT_HEADER_ONLY +#define FMT_FUNC inline +#include "format.cc" +#else +#define FMT_FUNC +#endif + +#endif // FMT_FORMAT_H_ |