4035 lines
134 KiB
C++
4035 lines
134 KiB
C++
/*
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Formatting library for C++
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Copyright (c) 2012 - present, Victor Zverovich
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Permission is hereby granted, free of charge, to any person obtaining
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a copy of this software and associated documentation files (the
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"Software"), to deal in the Software without restriction, including
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without limitation the rights to use, copy, modify, merge, publish,
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distribute, sublicense, and/or sell copies of the Software, and to
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permit persons to whom the Software is furnished to do so, subject to
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the following conditions:
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The above copyright notice and this permission notice shall be
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included in all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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--- Optional exception to the license ---
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As an exception, if, as a result of your compiling your source code, portions
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of this Software are embedded into a machine-executable object form of such
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source code, you may redistribute such embedded portions in such object form
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without including the above copyright and permission notices.
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*/
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#ifndef FMT_FORMAT_H_
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#define FMT_FORMAT_H_
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#include <cerrno>
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#include <cmath>
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#include <cstddef> // std::byte
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#include <cstdint>
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#include <cwchar>
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#include <limits>
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#include <memory>
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#include <stdexcept>
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#include <utility> // std::swap
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#include "core.h"
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#ifdef __INTEL_COMPILER
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# define FMT_ICC_VERSION __INTEL_COMPILER
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#elif defined(__ICL)
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# define FMT_ICC_VERSION __ICL
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#else
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# define FMT_ICC_VERSION 0
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#endif
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#ifdef __NVCC__
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# define FMT_CUDA_VERSION (__CUDACC_VER_MAJOR__ * 100 + __CUDACC_VER_MINOR__)
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#else
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# define FMT_CUDA_VERSION 0
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#endif
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#ifdef __has_builtin
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# define FMT_HAS_BUILTIN(x) __has_builtin(x)
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#else
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# define FMT_HAS_BUILTIN(x) 0
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#endif
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#if FMT_GCC_VERSION || FMT_CLANG_VERSION
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# define FMT_NOINLINE __attribute__((noinline))
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#else
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# define FMT_NOINLINE
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#endif
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#if FMT_GCC_VERSION
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# define FMT_GCC_VISIBILITY_HIDDEN __attribute__((visibility("hidden")))
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#else
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# define FMT_GCC_VISIBILITY_HIDDEN
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#endif
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#if __cplusplus == 201103L || __cplusplus == 201402L
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# if defined(__INTEL_COMPILER) || defined(__PGI)
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# define FMT_FALLTHROUGH
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# elif defined(__clang__)
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# define FMT_FALLTHROUGH [[clang::fallthrough]]
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# elif FMT_GCC_VERSION >= 700 && \
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(!defined(__EDG_VERSION__) || __EDG_VERSION__ >= 520)
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# define FMT_FALLTHROUGH [[gnu::fallthrough]]
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# else
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# define FMT_FALLTHROUGH
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# endif
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#elif FMT_HAS_CPP17_ATTRIBUTE(fallthrough) || \
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(defined(_MSVC_LANG) && _MSVC_LANG >= 201703L)
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# define FMT_FALLTHROUGH [[fallthrough]]
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#else
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# define FMT_FALLTHROUGH
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#endif
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#ifndef FMT_MAYBE_UNUSED
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# if FMT_HAS_CPP17_ATTRIBUTE(maybe_unused)
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# define FMT_MAYBE_UNUSED [[maybe_unused]]
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# else
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# define FMT_MAYBE_UNUSED
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# endif
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#endif
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#ifndef FMT_THROW
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# if FMT_EXCEPTIONS
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# if FMT_MSC_VER || FMT_NVCC
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FMT_BEGIN_NAMESPACE
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namespace detail {
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template <typename Exception> inline void do_throw(const Exception& x) {
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// Silence unreachable code warnings in MSVC and NVCC because these
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// are nearly impossible to fix in a generic code.
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volatile bool b = true;
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if (b) throw x;
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}
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} // namespace detail
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FMT_END_NAMESPACE
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# define FMT_THROW(x) detail::do_throw(x)
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# else
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# define FMT_THROW(x) throw x
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# endif
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# else
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# define FMT_THROW(x) \
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do { \
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FMT_ASSERT(false, (x).what()); \
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} while (false)
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# endif
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#endif
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#if FMT_EXCEPTIONS
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# define FMT_TRY try
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# define FMT_CATCH(x) catch (x)
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#else
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# define FMT_TRY if (true)
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# define FMT_CATCH(x) if (false)
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#endif
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#ifndef FMT_USE_USER_DEFINED_LITERALS
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// EDG based compilers (Intel, NVIDIA, Elbrus, etc), GCC and MSVC support UDLs.
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# if (FMT_HAS_FEATURE(cxx_user_literals) || FMT_GCC_VERSION >= 407 || \
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FMT_MSC_VER >= 1900) && \
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(!defined(__EDG_VERSION__) || __EDG_VERSION__ >= /* UDL feature */ 480)
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# define FMT_USE_USER_DEFINED_LITERALS 1
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# else
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# define FMT_USE_USER_DEFINED_LITERALS 0
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# endif
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#endif
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#ifndef FMT_USE_FLOAT
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# define FMT_USE_FLOAT 1
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#endif
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#ifndef FMT_USE_DOUBLE
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# define FMT_USE_DOUBLE 1
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#endif
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#ifndef FMT_USE_LONG_DOUBLE
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# define FMT_USE_LONG_DOUBLE 1
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#endif
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// Defining FMT_REDUCE_INT_INSTANTIATIONS to 1, will reduce the number of
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// integer formatter template instantiations to just one by only using the
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// largest integer type. This results in a reduction in binary size but will
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// cause a decrease in integer formatting performance.
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#if !defined(FMT_REDUCE_INT_INSTANTIATIONS)
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# define FMT_REDUCE_INT_INSTANTIATIONS 0
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#endif
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// __builtin_clz is broken in clang with Microsoft CodeGen:
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// https://github.com/fmtlib/fmt/issues/519
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#if (FMT_GCC_VERSION || FMT_HAS_BUILTIN(__builtin_clz)) && !FMT_MSC_VER
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# define FMT_BUILTIN_CLZ(n) __builtin_clz(n)
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#endif
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#if (FMT_GCC_VERSION || FMT_HAS_BUILTIN(__builtin_clzll)) && !FMT_MSC_VER
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# define FMT_BUILTIN_CLZLL(n) __builtin_clzll(n)
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#endif
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#if (FMT_GCC_VERSION || FMT_HAS_BUILTIN(__builtin_ctz))
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# define FMT_BUILTIN_CTZ(n) __builtin_ctz(n)
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#endif
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#if (FMT_GCC_VERSION || FMT_HAS_BUILTIN(__builtin_ctzll))
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# define FMT_BUILTIN_CTZLL(n) __builtin_ctzll(n)
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#endif
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#if FMT_MSC_VER
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# include <intrin.h> // _BitScanReverse[64], _BitScanForward[64], _umul128
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#endif
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// Some compilers masquerade as both MSVC and GCC-likes or otherwise support
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// __builtin_clz and __builtin_clzll, so only define FMT_BUILTIN_CLZ using the
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// MSVC intrinsics if the clz and clzll builtins are not available.
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#if FMT_MSC_VER && !defined(FMT_BUILTIN_CLZLL) && !defined(FMT_BUILTIN_CTZLL)
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FMT_BEGIN_NAMESPACE
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namespace detail {
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// Avoid Clang with Microsoft CodeGen's -Wunknown-pragmas warning.
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# if !defined(__clang__)
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# pragma managed(push, off)
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# pragma intrinsic(_BitScanForward)
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# pragma intrinsic(_BitScanReverse)
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# if defined(_WIN64)
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# pragma intrinsic(_BitScanForward64)
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# pragma intrinsic(_BitScanReverse64)
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# endif
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# endif
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inline int clz(uint32_t x) {
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unsigned long r = 0;
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_BitScanReverse(&r, x);
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FMT_ASSERT(x != 0, "");
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// Static analysis complains about using uninitialized data
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// "r", but the only way that can happen is if "x" is 0,
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// which the callers guarantee to not happen.
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FMT_MSC_WARNING(suppress : 6102)
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return 31 ^ static_cast<int>(r);
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}
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# define FMT_BUILTIN_CLZ(n) detail::clz(n)
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inline int clzll(uint64_t x) {
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unsigned long r = 0;
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# ifdef _WIN64
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_BitScanReverse64(&r, x);
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# else
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// Scan the high 32 bits.
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if (_BitScanReverse(&r, static_cast<uint32_t>(x >> 32))) return 63 ^ (r + 32);
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// Scan the low 32 bits.
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_BitScanReverse(&r, static_cast<uint32_t>(x));
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# endif
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FMT_ASSERT(x != 0, "");
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FMT_MSC_WARNING(suppress : 6102) // Suppress a bogus static analysis warning.
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return 63 ^ static_cast<int>(r);
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}
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# define FMT_BUILTIN_CLZLL(n) detail::clzll(n)
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inline int ctz(uint32_t x) {
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unsigned long r = 0;
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_BitScanForward(&r, x);
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FMT_ASSERT(x != 0, "");
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FMT_MSC_WARNING(suppress : 6102) // Suppress a bogus static analysis warning.
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return static_cast<int>(r);
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}
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# define FMT_BUILTIN_CTZ(n) detail::ctz(n)
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inline int ctzll(uint64_t x) {
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unsigned long r = 0;
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FMT_ASSERT(x != 0, "");
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FMT_MSC_WARNING(suppress : 6102) // Suppress a bogus static analysis warning.
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# ifdef _WIN64
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_BitScanForward64(&r, x);
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# else
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// Scan the low 32 bits.
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if (_BitScanForward(&r, static_cast<uint32_t>(x))) return static_cast<int>(r);
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// Scan the high 32 bits.
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_BitScanForward(&r, static_cast<uint32_t>(x >> 32));
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r += 32;
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# endif
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return static_cast<int>(r);
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}
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# define FMT_BUILTIN_CTZLL(n) detail::ctzll(n)
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# if !defined(__clang__)
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# pragma managed(pop)
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# endif
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} // namespace detail
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FMT_END_NAMESPACE
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#endif
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// Enable the deprecated numeric alignment.
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#ifndef FMT_DEPRECATED_NUMERIC_ALIGN
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# define FMT_DEPRECATED_NUMERIC_ALIGN 0
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#endif
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FMT_BEGIN_NAMESPACE
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namespace detail {
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#if __cplusplus >= 202002L || \
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(__cplusplus >= 201709L && FMT_GCC_VERSION >= 1002)
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# define FMT_CONSTEXPR20 constexpr
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#else
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# define FMT_CONSTEXPR20
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#endif
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// An equivalent of `*reinterpret_cast<Dest*>(&source)` that doesn't have
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// undefined behavior (e.g. due to type aliasing).
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// Example: uint64_t d = bit_cast<uint64_t>(2.718);
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template <typename Dest, typename Source>
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inline Dest bit_cast(const Source& source) {
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static_assert(sizeof(Dest) == sizeof(Source), "size mismatch");
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Dest dest;
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std::memcpy(&dest, &source, sizeof(dest));
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return dest;
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}
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inline bool is_big_endian() {
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const auto u = 1u;
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struct bytes {
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char data[sizeof(u)];
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};
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return bit_cast<bytes>(u).data[0] == 0;
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}
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// A fallback implementation of uintptr_t for systems that lack it.
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struct fallback_uintptr {
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unsigned char value[sizeof(void*)];
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fallback_uintptr() = default;
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explicit fallback_uintptr(const void* p) {
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*this = bit_cast<fallback_uintptr>(p);
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if (is_big_endian()) {
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for (size_t i = 0, j = sizeof(void*) - 1; i < j; ++i, --j)
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std::swap(value[i], value[j]);
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}
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}
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};
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#ifdef UINTPTR_MAX
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using uintptr_t = ::uintptr_t;
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inline uintptr_t to_uintptr(const void* p) { return bit_cast<uintptr_t>(p); }
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#else
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using uintptr_t = fallback_uintptr;
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inline fallback_uintptr to_uintptr(const void* p) {
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return fallback_uintptr(p);
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}
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#endif
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// Returns the largest possible value for type T. Same as
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// std::numeric_limits<T>::max() but shorter and not affected by the max macro.
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template <typename T> constexpr T max_value() {
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return (std::numeric_limits<T>::max)();
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}
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template <typename T> constexpr int num_bits() {
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return std::numeric_limits<T>::digits;
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}
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// std::numeric_limits<T>::digits may return 0 for 128-bit ints.
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template <> constexpr int num_bits<int128_t>() { return 128; }
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template <> constexpr int num_bits<uint128_t>() { return 128; }
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template <> constexpr int num_bits<fallback_uintptr>() {
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return static_cast<int>(sizeof(void*) *
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std::numeric_limits<unsigned char>::digits);
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}
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FMT_INLINE void assume(bool condition) {
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(void)condition;
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#if FMT_HAS_BUILTIN(__builtin_assume)
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__builtin_assume(condition);
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#endif
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}
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// An approximation of iterator_t for pre-C++20 systems.
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template <typename T>
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using iterator_t = decltype(std::begin(std::declval<T&>()));
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template <typename T> using sentinel_t = decltype(std::end(std::declval<T&>()));
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// A workaround for std::string not having mutable data() until C++17.
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template <typename Char> inline Char* get_data(std::basic_string<Char>& s) {
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return &s[0];
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}
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template <typename Container>
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inline typename Container::value_type* get_data(Container& c) {
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return c.data();
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}
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#if defined(_SECURE_SCL) && _SECURE_SCL
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// Make a checked iterator to avoid MSVC warnings.
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template <typename T> using checked_ptr = stdext::checked_array_iterator<T*>;
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template <typename T> checked_ptr<T> make_checked(T* p, size_t size) {
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return {p, size};
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}
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#else
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template <typename T> using checked_ptr = T*;
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template <typename T> inline T* make_checked(T* p, size_t) { return p; }
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#endif
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template <typename Container, FMT_ENABLE_IF(is_contiguous<Container>::value)>
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#if FMT_CLANG_VERSION >= 307
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__attribute__((no_sanitize("undefined")))
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#endif
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inline checked_ptr<typename Container::value_type>
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reserve(std::back_insert_iterator<Container> it, size_t n) {
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Container& c = get_container(it);
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size_t size = c.size();
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c.resize(size + n);
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return make_checked(get_data(c) + size, n);
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}
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template <typename T>
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inline buffer_appender<T> reserve(buffer_appender<T> it, size_t n) {
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buffer<T>& buf = get_container(it);
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buf.try_reserve(buf.size() + n);
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return it;
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}
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template <typename Iterator> constexpr Iterator& reserve(Iterator& it, size_t) {
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return it;
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}
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template <typename OutputIt>
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using reserve_iterator =
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remove_reference_t<decltype(reserve(std::declval<OutputIt&>(), 0))>;
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template <typename T, typename OutputIt>
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constexpr T* to_pointer(OutputIt, size_t) {
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return nullptr;
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}
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template <typename T> T* to_pointer(buffer_appender<T> it, size_t n) {
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buffer<T>& buf = get_container(it);
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auto size = buf.size();
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if (buf.capacity() < size + n) return nullptr;
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buf.try_resize(size + n);
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return buf.data() + size;
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}
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template <typename Container, FMT_ENABLE_IF(is_contiguous<Container>::value)>
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inline std::back_insert_iterator<Container> base_iterator(
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std::back_insert_iterator<Container>& it,
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checked_ptr<typename Container::value_type>) {
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return it;
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}
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template <typename Iterator>
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constexpr Iterator base_iterator(Iterator, Iterator it) {
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return it;
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}
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// An output iterator that counts the number of objects written to it and
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// discards them.
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class counting_iterator {
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private:
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size_t count_;
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public:
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using iterator_category = std::output_iterator_tag;
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using difference_type = std::ptrdiff_t;
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using pointer = void;
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using reference = void;
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using _Unchecked_type = counting_iterator; // Mark iterator as checked.
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struct value_type {
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template <typename T> void operator=(const T&) {}
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};
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counting_iterator() : count_(0) {}
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size_t count() const { return count_; }
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counting_iterator& operator++() {
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++count_;
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return *this;
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}
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|
counting_iterator operator++(int) {
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auto it = *this;
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++*this;
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return it;
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}
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friend counting_iterator operator+(counting_iterator it, difference_type n) {
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it.count_ += static_cast<size_t>(n);
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return it;
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}
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value_type operator*() const { return {}; }
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};
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// <algorithm> is spectacularly slow to compile in C++20 so use a simple fill_n
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// instead (#1998).
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|
template <typename OutputIt, typename Size, typename T>
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FMT_CONSTEXPR OutputIt fill_n(OutputIt out, Size count, const T& value) {
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for (Size i = 0; i < count; ++i) *out++ = value;
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return out;
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}
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template <typename T, typename Size>
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FMT_CONSTEXPR20 T* fill_n(T* out, Size count, char value) {
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if (is_constant_evaluated()) {
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return fill_n<T*, Size, T>(out, count, value);
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}
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|
std::memset(out, value, to_unsigned(count));
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return out + count;
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|
}
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|
|
template <typename InputIt, typename OutChar>
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|
using needs_conversion = bool_constant<
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|
std::is_same<typename std::iterator_traits<InputIt>::value_type,
|
|
char>::value &&
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|
std::is_same<OutChar, char8_type>::value>;
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|
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template <typename OutChar, typename InputIt, typename OutputIt,
|
|
FMT_ENABLE_IF(!needs_conversion<InputIt, OutChar>::value)>
|
|
FMT_CONSTEXPR OutputIt copy_str(InputIt begin, InputIt end, OutputIt it) {
|
|
while (begin != end) *it++ = *begin++;
|
|
return it;
|
|
}
|
|
|
|
template <typename OutChar, typename InputIt,
|
|
FMT_ENABLE_IF(!needs_conversion<InputIt, OutChar>::value)>
|
|
FMT_CONSTEXPR20 OutChar* copy_str(InputIt begin, InputIt end, OutChar* out) {
|
|
if (is_constant_evaluated()) {
|
|
return copy_str<OutChar, InputIt, OutChar*>(begin, end, out);
|
|
}
|
|
return std::uninitialized_copy(begin, end, out);
|
|
}
|
|
|
|
template <typename OutChar, typename InputIt, typename OutputIt,
|
|
FMT_ENABLE_IF(needs_conversion<InputIt, OutChar>::value)>
|
|
OutputIt copy_str(InputIt begin, InputIt end, OutputIt it) {
|
|
while (begin != end) *it++ = static_cast<char8_type>(*begin++);
|
|
return it;
|
|
}
|
|
|
|
template <typename OutChar, typename InputIt,
|
|
FMT_ENABLE_IF(!needs_conversion<InputIt, OutChar>::value)>
|
|
buffer_appender<OutChar> copy_str(InputIt begin, InputIt end,
|
|
buffer_appender<OutChar> out) {
|
|
get_container(out).append(begin, end);
|
|
return out;
|
|
}
|
|
|
|
template <typename Char, typename InputIt>
|
|
inline counting_iterator copy_str(InputIt begin, InputIt end,
|
|
counting_iterator it) {
|
|
return it + (end - begin);
|
|
}
|
|
|
|
template <typename Char>
|
|
FMT_CONSTEXPR int code_point_length(const Char* begin) {
|
|
if (const_check(sizeof(Char) != 1)) return 1;
|
|
constexpr char lengths[] = {1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
|
|
0, 0, 0, 0, 0, 0, 0, 0, 2, 2, 2, 2, 3, 3, 4, 0};
|
|
int len = lengths[static_cast<unsigned char>(*begin) >> 3];
|
|
|
|
// Compute the pointer to the next character early so that the next
|
|
// iteration can start working on the next character. Neither Clang
|
|
// nor GCC figure out this reordering on their own.
|
|
return len + !len;
|
|
}
|
|
|
|
// A public domain branchless UTF-8 decoder by Christopher Wellons:
|
|
// https://github.com/skeeto/branchless-utf8
|
|
/* Decode the next character, c, from s, reporting errors in e.
|
|
*
|
|
* Since this is a branchless decoder, four bytes will be read from the
|
|
* buffer regardless of the actual length of the next character. This
|
|
* means the buffer _must_ have at least three bytes of zero padding
|
|
* following the end of the data stream.
|
|
*
|
|
* Errors are reported in e, which will be non-zero if the parsed
|
|
* character was somehow invalid: invalid byte sequence, non-canonical
|
|
* encoding, or a surrogate half.
|
|
*
|
|
* The function returns a pointer to the next character. When an error
|
|
* occurs, this pointer will be a guess that depends on the particular
|
|
* error, but it will always advance at least one byte.
|
|
*/
|
|
FMT_CONSTEXPR inline const char* utf8_decode(const char* s, uint32_t* c,
|
|
int* e) {
|
|
constexpr const int masks[] = {0x00, 0x7f, 0x1f, 0x0f, 0x07};
|
|
constexpr const uint32_t mins[] = {4194304, 0, 128, 2048, 65536};
|
|
constexpr const int shiftc[] = {0, 18, 12, 6, 0};
|
|
constexpr const int shifte[] = {0, 6, 4, 2, 0};
|
|
|
|
int len = code_point_length(s);
|
|
const char* next = s + len;
|
|
|
|
// Assume a four-byte character and load four bytes. Unused bits are
|
|
// shifted out.
|
|
*c = uint32_t(s[0] & masks[len]) << 18;
|
|
*c |= uint32_t(s[1] & 0x3f) << 12;
|
|
*c |= uint32_t(s[2] & 0x3f) << 6;
|
|
*c |= uint32_t(s[3] & 0x3f) << 0;
|
|
*c >>= shiftc[len];
|
|
|
|
// Accumulate the various error conditions.
|
|
using uchar = unsigned char;
|
|
*e = (*c < mins[len]) << 6; // non-canonical encoding
|
|
*e |= ((*c >> 11) == 0x1b) << 7; // surrogate half?
|
|
*e |= (*c > 0x10FFFF) << 8; // out of range?
|
|
*e |= (uchar(s[1]) & 0xc0) >> 2;
|
|
*e |= (uchar(s[2]) & 0xc0) >> 4;
|
|
*e |= uchar(s[3]) >> 6;
|
|
*e ^= 0x2a; // top two bits of each tail byte correct?
|
|
*e >>= shifte[len];
|
|
|
|
return next;
|
|
}
|
|
|
|
template <typename F>
|
|
FMT_CONSTEXPR void for_each_codepoint(string_view s, F f) {
|
|
auto decode = [f](const char* p) {
|
|
auto cp = uint32_t();
|
|
auto error = 0;
|
|
p = utf8_decode(p, &cp, &error);
|
|
f(cp, error);
|
|
return p;
|
|
};
|
|
auto p = s.data();
|
|
const size_t block_size = 4; // utf8_decode always reads blocks of 4 chars.
|
|
if (s.size() >= block_size) {
|
|
for (auto end = p + s.size() - block_size + 1; p < end;) p = decode(p);
|
|
}
|
|
if (auto num_chars_left = s.data() + s.size() - p) {
|
|
char buf[2 * block_size - 1] = {};
|
|
copy_str<char>(p, p + num_chars_left, buf);
|
|
p = buf;
|
|
do {
|
|
p = decode(p);
|
|
} while (p - buf < num_chars_left);
|
|
}
|
|
}
|
|
|
|
template <typename Char>
|
|
inline size_t compute_width(basic_string_view<Char> s) {
|
|
return s.size();
|
|
}
|
|
|
|
// Computes approximate display width of a UTF-8 string.
|
|
FMT_CONSTEXPR inline size_t compute_width(string_view s) {
|
|
size_t num_code_points = 0;
|
|
// It is not a lambda for compatibility with C++14.
|
|
struct count_code_points {
|
|
size_t* count;
|
|
FMT_CONSTEXPR void operator()(uint32_t cp, int error) const {
|
|
*count +=
|
|
1 +
|
|
(error == 0 && cp >= 0x1100 &&
|
|
(cp <= 0x115f || // Hangul Jamo init. consonants
|
|
cp == 0x2329 || // LEFT-POINTING ANGLE BRACKET〈
|
|
cp == 0x232a || // RIGHT-POINTING ANGLE BRACKET 〉
|
|
// CJK ... Yi except Unicode Character “〿”:
|
|
(cp >= 0x2e80 && cp <= 0xa4cf && cp != 0x303f) ||
|
|
(cp >= 0xac00 && cp <= 0xd7a3) || // Hangul Syllables
|
|
(cp >= 0xf900 && cp <= 0xfaff) || // CJK Compatibility Ideographs
|
|
(cp >= 0xfe10 && cp <= 0xfe19) || // Vertical Forms
|
|
(cp >= 0xfe30 && cp <= 0xfe6f) || // CJK Compatibility Forms
|
|
(cp >= 0xff00 && cp <= 0xff60) || // Fullwidth Forms
|
|
(cp >= 0xffe0 && cp <= 0xffe6) || // Fullwidth Forms
|
|
(cp >= 0x20000 && cp <= 0x2fffd) || // CJK
|
|
(cp >= 0x30000 && cp <= 0x3fffd) ||
|
|
// Miscellaneous Symbols and Pictographs + Emoticons:
|
|
(cp >= 0x1f300 && cp <= 0x1f64f) ||
|
|
// Supplemental Symbols and Pictographs:
|
|
(cp >= 0x1f900 && cp <= 0x1f9ff)));
|
|
}
|
|
};
|
|
for_each_codepoint(s, count_code_points{&num_code_points});
|
|
return num_code_points;
|
|
}
|
|
|
|
inline size_t compute_width(basic_string_view<char8_type> s) {
|
|
return compute_width(basic_string_view<char>(
|
|
reinterpret_cast<const char*>(s.data()), s.size()));
|
|
}
|
|
|
|
template <typename Char>
|
|
inline size_t code_point_index(basic_string_view<Char> s, size_t n) {
|
|
size_t size = s.size();
|
|
return n < size ? n : size;
|
|
}
|
|
|
|
// Calculates the index of the nth code point in a UTF-8 string.
|
|
inline size_t code_point_index(basic_string_view<char8_type> s, size_t n) {
|
|
const char8_type* data = s.data();
|
|
size_t num_code_points = 0;
|
|
for (size_t i = 0, size = s.size(); i != size; ++i) {
|
|
if ((data[i] & 0xc0) != 0x80 && ++num_code_points > n) return i;
|
|
}
|
|
return s.size();
|
|
}
|
|
|
|
template <typename T>
|
|
using is_fast_float = bool_constant<std::numeric_limits<T>::is_iec559 &&
|
|
sizeof(T) <= sizeof(double)>;
|
|
|
|
#ifndef FMT_USE_FULL_CACHE_DRAGONBOX
|
|
# define FMT_USE_FULL_CACHE_DRAGONBOX 0
|
|
#endif
|
|
|
|
template <typename T>
|
|
template <typename U>
|
|
void buffer<T>::append(const U* begin, const U* end) {
|
|
while (begin != end) {
|
|
auto count = to_unsigned(end - begin);
|
|
try_reserve(size_ + count);
|
|
auto free_cap = capacity_ - size_;
|
|
if (free_cap < count) count = free_cap;
|
|
std::uninitialized_copy_n(begin, count, make_checked(ptr_ + size_, count));
|
|
size_ += count;
|
|
begin += count;
|
|
}
|
|
}
|
|
|
|
template <typename OutputIt, typename T, typename Traits>
|
|
void iterator_buffer<OutputIt, T, Traits>::flush() {
|
|
auto size = this->size();
|
|
this->clear();
|
|
out_ = copy_str<T>(data_, data_ + this->limit(size), out_);
|
|
}
|
|
} // namespace detail
|
|
|
|
// The number of characters to store in the basic_memory_buffer object itself
|
|
// to avoid dynamic memory allocation.
|
|
enum { inline_buffer_size = 500 };
|
|
|
|
/**
|
|
\rst
|
|
A dynamically growing memory buffer for trivially copyable/constructible types
|
|
with the first ``SIZE`` elements stored in the object itself.
|
|
|
|
You can use one of the following type aliases for common character types:
|
|
|
|
+----------------+------------------------------+
|
|
| Type | Definition |
|
|
+================+==============================+
|
|
| memory_buffer | basic_memory_buffer<char> |
|
|
+----------------+------------------------------+
|
|
| wmemory_buffer | basic_memory_buffer<wchar_t> |
|
|
+----------------+------------------------------+
|
|
|
|
**Example**::
|
|
|
|
fmt::memory_buffer out;
|
|
format_to(out, "The answer is {}.", 42);
|
|
|
|
This will append the following output to the ``out`` object:
|
|
|
|
.. code-block:: none
|
|
|
|
The answer is 42.
|
|
|
|
The output can be converted to an ``std::string`` with ``to_string(out)``.
|
|
\endrst
|
|
*/
|
|
template <typename T, size_t SIZE = inline_buffer_size,
|
|
typename Allocator = std::allocator<T>>
|
|
class basic_memory_buffer final : public detail::buffer<T> {
|
|
private:
|
|
T store_[SIZE];
|
|
|
|
// Don't inherit from Allocator avoid generating type_info for it.
|
|
Allocator alloc_;
|
|
|
|
// Deallocate memory allocated by the buffer.
|
|
void deallocate() {
|
|
T* data = this->data();
|
|
if (data != store_) alloc_.deallocate(data, this->capacity());
|
|
}
|
|
|
|
protected:
|
|
void grow(size_t size) final FMT_OVERRIDE;
|
|
|
|
public:
|
|
using value_type = T;
|
|
using const_reference = const T&;
|
|
|
|
explicit basic_memory_buffer(const Allocator& alloc = Allocator())
|
|
: alloc_(alloc) {
|
|
this->set(store_, SIZE);
|
|
}
|
|
~basic_memory_buffer() { deallocate(); }
|
|
|
|
private:
|
|
// Move data from other to this buffer.
|
|
void move(basic_memory_buffer& other) {
|
|
alloc_ = std::move(other.alloc_);
|
|
T* data = other.data();
|
|
size_t size = other.size(), capacity = other.capacity();
|
|
if (data == other.store_) {
|
|
this->set(store_, capacity);
|
|
std::uninitialized_copy(other.store_, other.store_ + size,
|
|
detail::make_checked(store_, capacity));
|
|
} else {
|
|
this->set(data, capacity);
|
|
// Set pointer to the inline array so that delete is not called
|
|
// when deallocating.
|
|
other.set(other.store_, 0);
|
|
}
|
|
this->resize(size);
|
|
}
|
|
|
|
public:
|
|
/**
|
|
\rst
|
|
Constructs a :class:`fmt::basic_memory_buffer` object moving the content
|
|
of the other object to it.
|
|
\endrst
|
|
*/
|
|
basic_memory_buffer(basic_memory_buffer&& other) FMT_NOEXCEPT { move(other); }
|
|
|
|
/**
|
|
\rst
|
|
Moves the content of the other ``basic_memory_buffer`` object to this one.
|
|
\endrst
|
|
*/
|
|
basic_memory_buffer& operator=(basic_memory_buffer&& other) FMT_NOEXCEPT {
|
|
FMT_ASSERT(this != &other, "");
|
|
deallocate();
|
|
move(other);
|
|
return *this;
|
|
}
|
|
|
|
// Returns a copy of the allocator associated with this buffer.
|
|
Allocator get_allocator() const { return alloc_; }
|
|
|
|
/**
|
|
Resizes the buffer to contain *count* elements. If T is a POD type new
|
|
elements may not be initialized.
|
|
*/
|
|
void resize(size_t count) { this->try_resize(count); }
|
|
|
|
/** Increases the buffer capacity to *new_capacity*. */
|
|
void reserve(size_t new_capacity) { this->try_reserve(new_capacity); }
|
|
|
|
// Directly append data into the buffer
|
|
using detail::buffer<T>::append;
|
|
template <typename ContiguousRange>
|
|
void append(const ContiguousRange& range) {
|
|
append(range.data(), range.data() + range.size());
|
|
}
|
|
};
|
|
|
|
template <typename T, size_t SIZE, typename Allocator>
|
|
void basic_memory_buffer<T, SIZE, Allocator>::grow(size_t size) {
|
|
#ifdef FMT_FUZZ
|
|
if (size > 5000) throw std::runtime_error("fuzz mode - won't grow that much");
|
|
#endif
|
|
const size_t max_size = std::allocator_traits<Allocator>::max_size(alloc_);
|
|
size_t old_capacity = this->capacity();
|
|
size_t new_capacity = old_capacity + old_capacity / 2;
|
|
if (size > new_capacity)
|
|
new_capacity = size;
|
|
else if (new_capacity > max_size)
|
|
new_capacity = size > max_size ? size : max_size;
|
|
T* old_data = this->data();
|
|
T* new_data =
|
|
std::allocator_traits<Allocator>::allocate(alloc_, new_capacity);
|
|
// The following code doesn't throw, so the raw pointer above doesn't leak.
|
|
std::uninitialized_copy(old_data, old_data + this->size(),
|
|
detail::make_checked(new_data, new_capacity));
|
|
this->set(new_data, new_capacity);
|
|
// deallocate must not throw according to the standard, but even if it does,
|
|
// the buffer already uses the new storage and will deallocate it in
|
|
// destructor.
|
|
if (old_data != store_) alloc_.deallocate(old_data, old_capacity);
|
|
}
|
|
|
|
using memory_buffer = basic_memory_buffer<char>;
|
|
using wmemory_buffer = basic_memory_buffer<wchar_t>;
|
|
|
|
template <typename T, size_t SIZE, typename Allocator>
|
|
struct is_contiguous<basic_memory_buffer<T, SIZE, Allocator>> : std::true_type {
|
|
};
|
|
|
|
/** A formatting error such as invalid format string. */
|
|
FMT_CLASS_API
|
|
class FMT_API format_error : public std::runtime_error {
|
|
public:
|
|
explicit format_error(const char* message) : std::runtime_error(message) {}
|
|
explicit format_error(const std::string& message)
|
|
: std::runtime_error(message) {}
|
|
format_error(const format_error&) = default;
|
|
format_error& operator=(const format_error&) = default;
|
|
format_error(format_error&&) = default;
|
|
format_error& operator=(format_error&&) = default;
|
|
~format_error() FMT_NOEXCEPT FMT_OVERRIDE;
|
|
};
|
|
|
|
namespace detail {
|
|
|
|
template <typename T>
|
|
using is_signed =
|
|
std::integral_constant<bool, std::numeric_limits<T>::is_signed ||
|
|
std::is_same<T, int128_t>::value>;
|
|
|
|
// Returns true if value is negative, false otherwise.
|
|
// Same as `value < 0` but doesn't produce warnings if T is an unsigned type.
|
|
template <typename T, FMT_ENABLE_IF(is_signed<T>::value)>
|
|
FMT_CONSTEXPR bool is_negative(T value) {
|
|
return value < 0;
|
|
}
|
|
template <typename T, FMT_ENABLE_IF(!is_signed<T>::value)>
|
|
FMT_CONSTEXPR bool is_negative(T) {
|
|
return false;
|
|
}
|
|
|
|
template <typename T, FMT_ENABLE_IF(std::is_floating_point<T>::value)>
|
|
FMT_CONSTEXPR bool is_supported_floating_point(T) {
|
|
return (std::is_same<T, float>::value && FMT_USE_FLOAT) ||
|
|
(std::is_same<T, double>::value && FMT_USE_DOUBLE) ||
|
|
(std::is_same<T, long double>::value && FMT_USE_LONG_DOUBLE);
|
|
}
|
|
|
|
// Smallest of uint32_t, uint64_t, uint128_t that is large enough to
|
|
// represent all values of an integral type T.
|
|
template <typename T>
|
|
using uint32_or_64_or_128_t =
|
|
conditional_t<num_bits<T>() <= 32 && !FMT_REDUCE_INT_INSTANTIATIONS,
|
|
uint32_t,
|
|
conditional_t<num_bits<T>() <= 64, uint64_t, uint128_t>>;
|
|
template <typename T>
|
|
using uint64_or_128_t = conditional_t<num_bits<T>() <= 64, uint64_t, uint128_t>;
|
|
|
|
// 128-bit integer type used internally
|
|
struct FMT_EXTERN_TEMPLATE_API uint128_wrapper {
|
|
uint128_wrapper() = default;
|
|
|
|
#if FMT_USE_INT128
|
|
uint128_t internal_;
|
|
|
|
uint128_wrapper(uint64_t high, uint64_t low) FMT_NOEXCEPT
|
|
: internal_{static_cast<uint128_t>(low) |
|
|
(static_cast<uint128_t>(high) << 64)} {}
|
|
|
|
uint128_wrapper(uint128_t u) : internal_{u} {}
|
|
|
|
uint64_t high() const FMT_NOEXCEPT { return uint64_t(internal_ >> 64); }
|
|
uint64_t low() const FMT_NOEXCEPT { return uint64_t(internal_); }
|
|
|
|
uint128_wrapper& operator+=(uint64_t n) FMT_NOEXCEPT {
|
|
internal_ += n;
|
|
return *this;
|
|
}
|
|
#else
|
|
uint64_t high_;
|
|
uint64_t low_;
|
|
|
|
uint128_wrapper(uint64_t high, uint64_t low) FMT_NOEXCEPT : high_{high},
|
|
low_{low} {}
|
|
|
|
uint64_t high() const FMT_NOEXCEPT { return high_; }
|
|
uint64_t low() const FMT_NOEXCEPT { return low_; }
|
|
|
|
uint128_wrapper& operator+=(uint64_t n) FMT_NOEXCEPT {
|
|
# if defined(_MSC_VER) && defined(_M_X64)
|
|
unsigned char carry = _addcarry_u64(0, low_, n, &low_);
|
|
_addcarry_u64(carry, high_, 0, &high_);
|
|
return *this;
|
|
# else
|
|
uint64_t sum = low_ + n;
|
|
high_ += (sum < low_ ? 1 : 0);
|
|
low_ = sum;
|
|
return *this;
|
|
# endif
|
|
}
|
|
#endif
|
|
};
|
|
|
|
// Table entry type for divisibility test used internally
|
|
template <typename T> struct FMT_EXTERN_TEMPLATE_API divtest_table_entry {
|
|
T mod_inv;
|
|
T max_quotient;
|
|
};
|
|
|
|
// Static data is placed in this class template for the header-only config.
|
|
template <typename T = void> struct FMT_EXTERN_TEMPLATE_API basic_data {
|
|
static const uint64_t powers_of_10_64[];
|
|
static const uint32_t zero_or_powers_of_10_32_new[];
|
|
static const uint64_t zero_or_powers_of_10_64_new[];
|
|
static const uint64_t grisu_pow10_significands[];
|
|
static const int16_t grisu_pow10_exponents[];
|
|
static const divtest_table_entry<uint32_t> divtest_table_for_pow5_32[];
|
|
static const divtest_table_entry<uint64_t> divtest_table_for_pow5_64[];
|
|
static const uint64_t dragonbox_pow10_significands_64[];
|
|
static const uint128_wrapper dragonbox_pow10_significands_128[];
|
|
// log10(2) = 0x0.4d104d427de7fbcc...
|
|
static const uint64_t log10_2_significand = 0x4d104d427de7fbcc;
|
|
#if !FMT_USE_FULL_CACHE_DRAGONBOX
|
|
static const uint64_t powers_of_5_64[];
|
|
static const uint32_t dragonbox_pow10_recovery_errors[];
|
|
#endif
|
|
// GCC generates slightly better code for pairs than chars.
|
|
using digit_pair = char[2];
|
|
static const digit_pair digits[];
|
|
static constexpr const char hex_digits[] = "0123456789abcdef";
|
|
static const char foreground_color[];
|
|
static const char background_color[];
|
|
static const char reset_color[5];
|
|
static const wchar_t wreset_color[5];
|
|
static const char signs[];
|
|
static constexpr const unsigned prefixes[] = {0, 0, 0x1000000u | '+',
|
|
0x1000000u | ' '};
|
|
static constexpr const char left_padding_shifts[] = {31, 31, 0, 1, 0};
|
|
static constexpr const char right_padding_shifts[] = {0, 31, 0, 1, 0};
|
|
|
|
// DEPRECATED! These are for ABI compatibility.
|
|
static const uint32_t zero_or_powers_of_10_32[];
|
|
static const uint64_t zero_or_powers_of_10_64[];
|
|
};
|
|
|
|
// Maps bsr(n) to ceil(log10(pow(2, bsr(n) + 1) - 1)).
|
|
// This is a function instead of an array to workaround a bug in GCC10 (#1810).
|
|
FMT_INLINE uint16_t bsr2log10(int bsr) {
|
|
static constexpr uint16_t data[] = {
|
|
1, 1, 1, 2, 2, 2, 3, 3, 3, 4, 4, 4, 4, 5, 5, 5,
|
|
6, 6, 6, 7, 7, 7, 7, 8, 8, 8, 9, 9, 9, 10, 10, 10,
|
|
10, 11, 11, 11, 12, 12, 12, 13, 13, 13, 13, 14, 14, 14, 15, 15,
|
|
15, 16, 16, 16, 16, 17, 17, 17, 18, 18, 18, 19, 19, 19, 19, 20};
|
|
return data[bsr];
|
|
}
|
|
|
|
#ifndef FMT_EXPORTED
|
|
FMT_EXTERN template struct basic_data<void>;
|
|
#endif
|
|
|
|
// This is a struct rather than an alias to avoid shadowing warnings in gcc.
|
|
struct data : basic_data<> {};
|
|
|
|
template <typename T> FMT_CONSTEXPR int count_digits_fallback(T n) {
|
|
int count = 1;
|
|
for (;;) {
|
|
// Integer division is slow so do it for a group of four digits instead
|
|
// of for every digit. The idea comes from the talk by Alexandrescu
|
|
// "Three Optimization Tips for C++". See speed-test for a comparison.
|
|
if (n < 10) return count;
|
|
if (n < 100) return count + 1;
|
|
if (n < 1000) return count + 2;
|
|
if (n < 10000) return count + 3;
|
|
n /= 10000u;
|
|
count += 4;
|
|
}
|
|
}
|
|
#if FMT_USE_INT128
|
|
FMT_CONSTEXPR inline int count_digits(uint128_t n) {
|
|
return count_digits_fallback(n);
|
|
}
|
|
#endif
|
|
|
|
// Returns the number of decimal digits in n. Leading zeros are not counted
|
|
// except for n == 0 in which case count_digits returns 1.
|
|
FMT_CONSTEXPR20 inline int count_digits(uint64_t n) {
|
|
if (is_constant_evaluated()) {
|
|
return count_digits_fallback(n);
|
|
}
|
|
#ifdef FMT_BUILTIN_CLZLL
|
|
// https://github.com/fmtlib/format-benchmark/blob/master/digits10
|
|
auto t = bsr2log10(FMT_BUILTIN_CLZLL(n | 1) ^ 63);
|
|
return t - (n < data::zero_or_powers_of_10_64_new[t]);
|
|
#else
|
|
return count_digits_fallback(n);
|
|
#endif
|
|
}
|
|
|
|
// Counts the number of digits in n. BITS = log2(radix).
|
|
template <int BITS, typename UInt> FMT_CONSTEXPR int count_digits(UInt n) {
|
|
#ifdef FMT_BUILTIN_CLZ
|
|
if (num_bits<UInt>() == 32)
|
|
return (FMT_BUILTIN_CLZ(static_cast<uint32_t>(n) | 1) ^ 31) / BITS + 1;
|
|
#endif
|
|
int num_digits = 0;
|
|
do {
|
|
++num_digits;
|
|
} while ((n >>= BITS) != 0);
|
|
return num_digits;
|
|
}
|
|
|
|
template <> int count_digits<4>(detail::fallback_uintptr n);
|
|
|
|
#if FMT_GCC_VERSION || FMT_CLANG_VERSION
|
|
# define FMT_ALWAYS_INLINE inline __attribute__((always_inline))
|
|
#elif FMT_MSC_VER
|
|
# define FMT_ALWAYS_INLINE __forceinline
|
|
#else
|
|
# define FMT_ALWAYS_INLINE inline
|
|
#endif
|
|
|
|
#ifdef FMT_BUILTIN_CLZ
|
|
// Optional version of count_digits for better performance on 32-bit platforms.
|
|
FMT_CONSTEXPR20 inline int count_digits(uint32_t n) {
|
|
if (is_constant_evaluated()) {
|
|
return count_digits_fallback(n);
|
|
}
|
|
auto t = bsr2log10(FMT_BUILTIN_CLZ(n | 1) ^ 31);
|
|
return t - (n < data::zero_or_powers_of_10_32_new[t]);
|
|
}
|
|
#endif
|
|
|
|
template <typename Int> constexpr int digits10() FMT_NOEXCEPT {
|
|
return std::numeric_limits<Int>::digits10;
|
|
}
|
|
template <> constexpr int digits10<int128_t>() FMT_NOEXCEPT { return 38; }
|
|
template <> constexpr int digits10<uint128_t>() FMT_NOEXCEPT { return 38; }
|
|
|
|
// DEPRECATED! grouping will be merged into thousands_sep.
|
|
template <typename Char> FMT_API std::string grouping_impl(locale_ref loc);
|
|
template <typename Char> inline std::string grouping(locale_ref loc) {
|
|
return grouping_impl<char>(loc);
|
|
}
|
|
template <> inline std::string grouping<wchar_t>(locale_ref loc) {
|
|
return grouping_impl<wchar_t>(loc);
|
|
}
|
|
|
|
template <typename Char> FMT_API Char thousands_sep_impl(locale_ref loc);
|
|
template <typename Char> inline Char thousands_sep(locale_ref loc) {
|
|
return Char(thousands_sep_impl<char>(loc));
|
|
}
|
|
template <> inline wchar_t thousands_sep(locale_ref loc) {
|
|
return thousands_sep_impl<wchar_t>(loc);
|
|
}
|
|
|
|
template <typename Char> FMT_API Char decimal_point_impl(locale_ref loc);
|
|
template <typename Char> inline Char decimal_point(locale_ref loc) {
|
|
return Char(decimal_point_impl<char>(loc));
|
|
}
|
|
template <> inline wchar_t decimal_point(locale_ref loc) {
|
|
return decimal_point_impl<wchar_t>(loc);
|
|
}
|
|
|
|
// Compares two characters for equality.
|
|
template <typename Char> bool equal2(const Char* lhs, const char* rhs) {
|
|
return lhs[0] == rhs[0] && lhs[1] == rhs[1];
|
|
}
|
|
inline bool equal2(const char* lhs, const char* rhs) {
|
|
return memcmp(lhs, rhs, 2) == 0;
|
|
}
|
|
|
|
// Copies two characters from src to dst.
|
|
template <typename Char> void copy2(Char* dst, const char* src) {
|
|
*dst++ = static_cast<Char>(*src++);
|
|
*dst = static_cast<Char>(*src);
|
|
}
|
|
FMT_INLINE void copy2(char* dst, const char* src) { memcpy(dst, src, 2); }
|
|
|
|
template <typename Iterator> struct format_decimal_result {
|
|
Iterator begin;
|
|
Iterator end;
|
|
};
|
|
|
|
// Formats a decimal unsigned integer value writing into out pointing to a
|
|
// buffer of specified size. The caller must ensure that the buffer is large
|
|
// enough.
|
|
template <typename Char, typename UInt>
|
|
FMT_CONSTEXPR20 format_decimal_result<Char*> format_decimal(Char* out,
|
|
UInt value,
|
|
int size) {
|
|
FMT_ASSERT(size >= count_digits(value), "invalid digit count");
|
|
out += size;
|
|
Char* end = out;
|
|
if (is_constant_evaluated()) {
|
|
while (value >= 10) {
|
|
*--out = static_cast<Char>('0' + value % 10);
|
|
value /= 10;
|
|
}
|
|
*--out = static_cast<Char>('0' + value);
|
|
return {out, end};
|
|
}
|
|
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.
|
|
out -= 2;
|
|
copy2(out, data::digits[value % 100]);
|
|
value /= 100;
|
|
}
|
|
if (value < 10) {
|
|
*--out = static_cast<Char>('0' + value);
|
|
return {out, end};
|
|
}
|
|
out -= 2;
|
|
copy2(out, data::digits[value]);
|
|
return {out, end};
|
|
}
|
|
|
|
template <typename Char, typename UInt, typename Iterator,
|
|
FMT_ENABLE_IF(!std::is_pointer<remove_cvref_t<Iterator>>::value)>
|
|
inline format_decimal_result<Iterator> format_decimal(Iterator out, UInt value,
|
|
int size) {
|
|
// Buffer is large enough to hold all digits (digits10 + 1).
|
|
Char buffer[digits10<UInt>() + 1];
|
|
auto end = format_decimal(buffer, value, size).end;
|
|
return {out, detail::copy_str<Char>(buffer, end, out)};
|
|
}
|
|
|
|
template <unsigned BASE_BITS, typename Char, typename UInt>
|
|
FMT_CONSTEXPR Char* format_uint(Char* buffer, UInt value, int num_digits,
|
|
bool upper = false) {
|
|
buffer += num_digits;
|
|
Char* end = buffer;
|
|
do {
|
|
const char* digits = upper ? "0123456789ABCDEF" : data::hex_digits;
|
|
unsigned digit = (value & ((1 << BASE_BITS) - 1));
|
|
*--buffer = static_cast<Char>(BASE_BITS < 4 ? static_cast<char>('0' + digit)
|
|
: digits[digit]);
|
|
} while ((value >>= BASE_BITS) != 0);
|
|
return end;
|
|
}
|
|
|
|
template <unsigned BASE_BITS, typename Char>
|
|
Char* format_uint(Char* buffer, detail::fallback_uintptr n, int num_digits,
|
|
bool = false) {
|
|
auto char_digits = std::numeric_limits<unsigned char>::digits / 4;
|
|
int start = (num_digits + char_digits - 1) / char_digits - 1;
|
|
if (int start_digits = num_digits % char_digits) {
|
|
unsigned value = n.value[start--];
|
|
buffer = format_uint<BASE_BITS>(buffer, value, start_digits);
|
|
}
|
|
for (; start >= 0; --start) {
|
|
unsigned value = n.value[start];
|
|
buffer += char_digits;
|
|
auto p = buffer;
|
|
for (int i = 0; i < char_digits; ++i) {
|
|
unsigned digit = (value & ((1 << BASE_BITS) - 1));
|
|
*--p = static_cast<Char>(data::hex_digits[digit]);
|
|
value >>= BASE_BITS;
|
|
}
|
|
}
|
|
return buffer;
|
|
}
|
|
|
|
template <unsigned BASE_BITS, typename Char, typename It, typename UInt>
|
|
inline It format_uint(It out, UInt value, int num_digits, bool upper = false) {
|
|
if (auto ptr = to_pointer<Char>(out, to_unsigned(num_digits))) {
|
|
format_uint<BASE_BITS>(ptr, value, num_digits, upper);
|
|
return out;
|
|
}
|
|
// Buffer should be large enough to hold all digits (digits / BASE_BITS + 1).
|
|
char buffer[num_bits<UInt>() / BASE_BITS + 1];
|
|
format_uint<BASE_BITS>(buffer, value, num_digits, upper);
|
|
return detail::copy_str<Char>(buffer, buffer + num_digits, out);
|
|
}
|
|
|
|
// A converter from UTF-8 to UTF-16.
|
|
class utf8_to_utf16 {
|
|
private:
|
|
wmemory_buffer buffer_;
|
|
|
|
public:
|
|
FMT_API explicit utf8_to_utf16(string_view s);
|
|
operator wstring_view() const { return {&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 {&buffer_[0], size()}; }
|
|
};
|
|
|
|
template <typename T = void> struct null {};
|
|
|
|
// Workaround an array initialization issue in gcc 4.8.
|
|
template <typename Char> struct fill_t {
|
|
private:
|
|
enum { max_size = 4 };
|
|
Char data_[max_size] = {Char(' '), Char(0), Char(0), Char(0)};
|
|
unsigned char size_ = 1;
|
|
|
|
public:
|
|
FMT_CONSTEXPR void operator=(basic_string_view<Char> s) {
|
|
auto size = s.size();
|
|
if (size > max_size) {
|
|
FMT_THROW(format_error("invalid fill"));
|
|
return;
|
|
}
|
|
for (size_t i = 0; i < size; ++i) data_[i] = s[i];
|
|
size_ = static_cast<unsigned char>(size);
|
|
}
|
|
|
|
constexpr size_t size() const { return size_; }
|
|
constexpr const Char* data() const { return data_; }
|
|
|
|
FMT_CONSTEXPR Char& operator[](size_t index) { return data_[index]; }
|
|
FMT_CONSTEXPR const Char& operator[](size_t index) const {
|
|
return data_[index];
|
|
}
|
|
};
|
|
} // namespace detail
|
|
|
|
// We cannot use enum classes as bit fields because of a gcc bug
|
|
// https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61414.
|
|
namespace align {
|
|
enum type { none, left, right, center, numeric };
|
|
}
|
|
using align_t = align::type;
|
|
|
|
namespace sign {
|
|
enum type { none, minus, plus, space };
|
|
}
|
|
using sign_t = sign::type;
|
|
|
|
// Format specifiers for built-in and string types.
|
|
template <typename Char> struct basic_format_specs {
|
|
int width;
|
|
int precision;
|
|
char type;
|
|
align_t align : 4;
|
|
sign_t sign : 3;
|
|
bool alt : 1; // Alternate form ('#').
|
|
bool localized : 1;
|
|
detail::fill_t<Char> fill;
|
|
|
|
constexpr basic_format_specs()
|
|
: width(0),
|
|
precision(-1),
|
|
type(0),
|
|
align(align::none),
|
|
sign(sign::none),
|
|
alt(false),
|
|
localized(false) {}
|
|
};
|
|
|
|
using format_specs = basic_format_specs<char>;
|
|
|
|
namespace detail {
|
|
namespace dragonbox {
|
|
|
|
// Type-specific information that Dragonbox uses.
|
|
template <class T> struct float_info;
|
|
|
|
template <> struct float_info<float> {
|
|
using carrier_uint = uint32_t;
|
|
static const int significand_bits = 23;
|
|
static const int exponent_bits = 8;
|
|
static const int min_exponent = -126;
|
|
static const int max_exponent = 127;
|
|
static const int exponent_bias = -127;
|
|
static const int decimal_digits = 9;
|
|
static const int kappa = 1;
|
|
static const int big_divisor = 100;
|
|
static const int small_divisor = 10;
|
|
static const int min_k = -31;
|
|
static const int max_k = 46;
|
|
static const int cache_bits = 64;
|
|
static const int divisibility_check_by_5_threshold = 39;
|
|
static const int case_fc_pm_half_lower_threshold = -1;
|
|
static const int case_fc_pm_half_upper_threshold = 6;
|
|
static const int case_fc_lower_threshold = -2;
|
|
static const int case_fc_upper_threshold = 6;
|
|
static const int case_shorter_interval_left_endpoint_lower_threshold = 2;
|
|
static const int case_shorter_interval_left_endpoint_upper_threshold = 3;
|
|
static const int shorter_interval_tie_lower_threshold = -35;
|
|
static const int shorter_interval_tie_upper_threshold = -35;
|
|
static const int max_trailing_zeros = 7;
|
|
};
|
|
|
|
template <> struct float_info<double> {
|
|
using carrier_uint = uint64_t;
|
|
static const int significand_bits = 52;
|
|
static const int exponent_bits = 11;
|
|
static const int min_exponent = -1022;
|
|
static const int max_exponent = 1023;
|
|
static const int exponent_bias = -1023;
|
|
static const int decimal_digits = 17;
|
|
static const int kappa = 2;
|
|
static const int big_divisor = 1000;
|
|
static const int small_divisor = 100;
|
|
static const int min_k = -292;
|
|
static const int max_k = 326;
|
|
static const int cache_bits = 128;
|
|
static const int divisibility_check_by_5_threshold = 86;
|
|
static const int case_fc_pm_half_lower_threshold = -2;
|
|
static const int case_fc_pm_half_upper_threshold = 9;
|
|
static const int case_fc_lower_threshold = -4;
|
|
static const int case_fc_upper_threshold = 9;
|
|
static const int case_shorter_interval_left_endpoint_lower_threshold = 2;
|
|
static const int case_shorter_interval_left_endpoint_upper_threshold = 3;
|
|
static const int shorter_interval_tie_lower_threshold = -77;
|
|
static const int shorter_interval_tie_upper_threshold = -77;
|
|
static const int max_trailing_zeros = 16;
|
|
};
|
|
|
|
template <typename T> struct decimal_fp {
|
|
using significand_type = typename float_info<T>::carrier_uint;
|
|
significand_type significand;
|
|
int exponent;
|
|
};
|
|
|
|
template <typename T> FMT_API decimal_fp<T> to_decimal(T x) FMT_NOEXCEPT;
|
|
} // namespace dragonbox
|
|
|
|
template <typename T>
|
|
constexpr typename dragonbox::float_info<T>::carrier_uint exponent_mask() {
|
|
using uint = typename dragonbox::float_info<T>::carrier_uint;
|
|
return ((uint(1) << dragonbox::float_info<T>::exponent_bits) - 1)
|
|
<< dragonbox::float_info<T>::significand_bits;
|
|
}
|
|
|
|
// A floating-point presentation format.
|
|
enum class float_format : unsigned char {
|
|
general, // General: exponent notation or fixed point based on magnitude.
|
|
exp, // Exponent notation with the default precision of 6, e.g. 1.2e-3.
|
|
fixed, // Fixed point with the default precision of 6, e.g. 0.0012.
|
|
hex
|
|
};
|
|
|
|
struct float_specs {
|
|
int precision;
|
|
float_format format : 8;
|
|
sign_t sign : 8;
|
|
bool upper : 1;
|
|
bool locale : 1;
|
|
bool binary32 : 1;
|
|
bool use_grisu : 1;
|
|
bool showpoint : 1;
|
|
};
|
|
|
|
// Writes the exponent exp in the form "[+-]d{2,3}" to buffer.
|
|
template <typename Char, typename It> It write_exponent(int exp, It it) {
|
|
FMT_ASSERT(-10000 < exp && exp < 10000, "exponent out of range");
|
|
if (exp < 0) {
|
|
*it++ = static_cast<Char>('-');
|
|
exp = -exp;
|
|
} else {
|
|
*it++ = static_cast<Char>('+');
|
|
}
|
|
if (exp >= 100) {
|
|
const char* top = data::digits[exp / 100];
|
|
if (exp >= 1000) *it++ = static_cast<Char>(top[0]);
|
|
*it++ = static_cast<Char>(top[1]);
|
|
exp %= 100;
|
|
}
|
|
const char* d = data::digits[exp];
|
|
*it++ = static_cast<Char>(d[0]);
|
|
*it++ = static_cast<Char>(d[1]);
|
|
return it;
|
|
}
|
|
|
|
template <typename T>
|
|
int format_float(T value, int precision, float_specs specs, buffer<char>& buf);
|
|
|
|
// Formats a floating-point number with snprintf.
|
|
template <typename T>
|
|
int snprintf_float(T value, int precision, float_specs specs,
|
|
buffer<char>& buf);
|
|
|
|
template <typename T> T promote_float(T value) { return value; }
|
|
inline double promote_float(float value) { return static_cast<double>(value); }
|
|
|
|
template <typename ErrorHandler = error_handler, typename Char>
|
|
FMT_CONSTEXPR float_specs parse_float_type_spec(
|
|
const basic_format_specs<Char>& specs, ErrorHandler&& eh = {}) {
|
|
auto result = float_specs();
|
|
result.showpoint = specs.alt;
|
|
result.locale = specs.localized;
|
|
switch (specs.type) {
|
|
case 0:
|
|
result.format = float_format::general;
|
|
break;
|
|
case 'G':
|
|
result.upper = true;
|
|
FMT_FALLTHROUGH;
|
|
case 'g':
|
|
result.format = float_format::general;
|
|
break;
|
|
case 'E':
|
|
result.upper = true;
|
|
FMT_FALLTHROUGH;
|
|
case 'e':
|
|
result.format = float_format::exp;
|
|
result.showpoint |= specs.precision != 0;
|
|
break;
|
|
case 'F':
|
|
result.upper = true;
|
|
FMT_FALLTHROUGH;
|
|
case 'f':
|
|
result.format = float_format::fixed;
|
|
result.showpoint |= specs.precision != 0;
|
|
break;
|
|
case 'A':
|
|
result.upper = true;
|
|
FMT_FALLTHROUGH;
|
|
case 'a':
|
|
result.format = float_format::hex;
|
|
break;
|
|
#ifdef FMT_DEPRECATED_N_SPECIFIER
|
|
case 'n':
|
|
result.locale = true;
|
|
break;
|
|
#endif
|
|
default:
|
|
eh.on_error("invalid type specifier");
|
|
break;
|
|
}
|
|
return result;
|
|
}
|
|
|
|
template <typename ErrorHandler>
|
|
FMT_CONSTEXPR void check_int_type_spec(char spec, ErrorHandler&& eh) {
|
|
switch (spec) {
|
|
case 0:
|
|
case 'd':
|
|
case 'x':
|
|
case 'X':
|
|
case 'b':
|
|
case 'B':
|
|
case 'o':
|
|
#ifdef FMT_DEPRECATED_N_SPECIFIER
|
|
case 'n':
|
|
#endif
|
|
case 'c':
|
|
break;
|
|
default:
|
|
eh.on_error("invalid type specifier");
|
|
break;
|
|
}
|
|
}
|
|
|
|
template <typename Char, typename Handler>
|
|
FMT_CONSTEXPR void handle_char_specs(const basic_format_specs<Char>& specs,
|
|
Handler&& handler) {
|
|
if (specs.type && specs.type != 'c') return handler.on_int();
|
|
if (specs.align == align::numeric || specs.sign != sign::none || specs.alt)
|
|
handler.on_error("invalid format specifier for char");
|
|
handler.on_char();
|
|
}
|
|
|
|
template <typename Char, typename Handler>
|
|
FMT_CONSTEXPR void handle_cstring_type_spec(Char spec, Handler&& handler) {
|
|
if (spec == 0 || spec == 's')
|
|
handler.on_string();
|
|
else if (spec == 'p')
|
|
handler.on_pointer();
|
|
else
|
|
handler.on_error("invalid type specifier");
|
|
}
|
|
|
|
template <typename Char, typename ErrorHandler>
|
|
FMT_CONSTEXPR void check_string_type_spec(Char spec, ErrorHandler&& eh) {
|
|
if (spec != 0 && spec != 's') eh.on_error("invalid type specifier");
|
|
}
|
|
|
|
template <typename Char, typename ErrorHandler>
|
|
FMT_CONSTEXPR void check_pointer_type_spec(Char spec, ErrorHandler&& eh) {
|
|
if (spec != 0 && spec != 'p') eh.on_error("invalid type specifier");
|
|
}
|
|
|
|
template <typename ErrorHandler>
|
|
class char_specs_checker : public ErrorHandler {
|
|
private:
|
|
char type_;
|
|
|
|
public:
|
|
FMT_CONSTEXPR char_specs_checker(char type, ErrorHandler eh)
|
|
: ErrorHandler(eh), type_(type) {}
|
|
|
|
FMT_CONSTEXPR void on_int() { check_int_type_spec(type_, *this); }
|
|
FMT_CONSTEXPR void on_char() {}
|
|
};
|
|
|
|
template <typename ErrorHandler>
|
|
class cstring_type_checker : public ErrorHandler {
|
|
public:
|
|
FMT_CONSTEXPR explicit cstring_type_checker(ErrorHandler eh)
|
|
: ErrorHandler(eh) {}
|
|
|
|
FMT_CONSTEXPR void on_string() {}
|
|
FMT_CONSTEXPR void on_pointer() {}
|
|
};
|
|
|
|
template <typename OutputIt, typename Char>
|
|
FMT_NOINLINE FMT_CONSTEXPR OutputIt fill(OutputIt it, size_t n,
|
|
const fill_t<Char>& fill) {
|
|
auto fill_size = fill.size();
|
|
if (fill_size == 1) return detail::fill_n(it, n, fill[0]);
|
|
auto data = fill.data();
|
|
for (size_t i = 0; i < n; ++i)
|
|
it = copy_str<Char>(data, data + fill_size, it);
|
|
return it;
|
|
}
|
|
|
|
// Writes the output of f, padded according to format specifications in specs.
|
|
// size: output size in code units.
|
|
// width: output display width in (terminal) column positions.
|
|
template <align::type align = align::left, typename OutputIt, typename Char,
|
|
typename F>
|
|
FMT_CONSTEXPR OutputIt write_padded(OutputIt out,
|
|
const basic_format_specs<Char>& specs,
|
|
size_t size, size_t width, F&& f) {
|
|
static_assert(align == align::left || align == align::right, "");
|
|
unsigned spec_width = to_unsigned(specs.width);
|
|
size_t padding = spec_width > width ? spec_width - width : 0;
|
|
auto* shifts = align == align::left ? data::left_padding_shifts
|
|
: data::right_padding_shifts;
|
|
size_t left_padding = padding >> shifts[specs.align];
|
|
size_t right_padding = padding - left_padding;
|
|
auto it = reserve(out, size + padding * specs.fill.size());
|
|
if (left_padding != 0) it = fill(it, left_padding, specs.fill);
|
|
it = f(it);
|
|
if (right_padding != 0) it = fill(it, right_padding, specs.fill);
|
|
return base_iterator(out, it);
|
|
}
|
|
|
|
template <align::type align = align::left, typename OutputIt, typename Char,
|
|
typename F>
|
|
constexpr OutputIt write_padded(OutputIt out,
|
|
const basic_format_specs<Char>& specs,
|
|
size_t size, F&& f) {
|
|
return write_padded<align>(out, specs, size, size, f);
|
|
}
|
|
|
|
template <typename Char, typename OutputIt>
|
|
OutputIt write_bytes(OutputIt out, string_view bytes,
|
|
const basic_format_specs<Char>& specs) {
|
|
return write_padded(out, specs, bytes.size(),
|
|
[bytes](reserve_iterator<OutputIt> it) {
|
|
const char* data = bytes.data();
|
|
return copy_str<Char>(data, data + bytes.size(), it);
|
|
});
|
|
}
|
|
|
|
template <typename Char, typename OutputIt>
|
|
constexpr OutputIt write_char(OutputIt out, Char value,
|
|
const basic_format_specs<Char>& specs) {
|
|
return write_padded(out, specs, 1, [=](reserve_iterator<OutputIt> it) {
|
|
*it++ = value;
|
|
return it;
|
|
});
|
|
}
|
|
|
|
// Data for write_int that doesn't depend on output iterator type. It is used to
|
|
// avoid template code bloat.
|
|
template <typename Char> struct write_int_data {
|
|
size_t size;
|
|
size_t padding;
|
|
|
|
FMT_CONSTEXPR write_int_data(int num_digits, unsigned prefix,
|
|
const basic_format_specs<Char>& specs)
|
|
: size((prefix >> 24) + to_unsigned(num_digits)), padding(0) {
|
|
if (specs.align == align::numeric) {
|
|
auto width = to_unsigned(specs.width);
|
|
if (width > size) {
|
|
padding = width - size;
|
|
size = width;
|
|
}
|
|
} else if (specs.precision > num_digits) {
|
|
size = (prefix >> 24) + to_unsigned(specs.precision);
|
|
padding = to_unsigned(specs.precision - num_digits);
|
|
}
|
|
}
|
|
};
|
|
|
|
// Writes an integer in the format
|
|
// <left-padding><prefix><numeric-padding><digits><right-padding>
|
|
// where <digits> are written by write_digits(it).
|
|
// prefix contains chars in three lower bytes and the size in the fourth byte.
|
|
template <typename OutputIt, typename Char, typename W>
|
|
FMT_CONSTEXPR FMT_INLINE OutputIt
|
|
write_int(OutputIt out, int num_digits, unsigned prefix,
|
|
const basic_format_specs<Char>& specs, W write_digits) {
|
|
// Slightly faster check for specs.width == 0 && specs.precision == -1.
|
|
if ((specs.width | (specs.precision + 1)) == 0) {
|
|
auto it = reserve(out, to_unsigned(num_digits) + (prefix >> 24));
|
|
if (prefix != 0) {
|
|
for (unsigned p = prefix & 0xffffff; p != 0; p >>= 8)
|
|
*it++ = static_cast<Char>(p & 0xff);
|
|
}
|
|
return base_iterator(out, write_digits(it));
|
|
}
|
|
auto data = write_int_data<Char>(num_digits, prefix, specs);
|
|
return write_padded<align::right>(
|
|
out, specs, data.size, [=](reserve_iterator<OutputIt> it) {
|
|
for (unsigned p = prefix & 0xffffff; p != 0; p >>= 8)
|
|
*it++ = static_cast<Char>(p & 0xff);
|
|
it = detail::fill_n(it, data.padding, static_cast<Char>('0'));
|
|
return write_digits(it);
|
|
});
|
|
}
|
|
|
|
template <typename OutputIt, typename UInt, typename Char>
|
|
bool write_int_localized(OutputIt& out, UInt value, unsigned prefix,
|
|
const basic_format_specs<Char>& specs,
|
|
locale_ref loc) {
|
|
static_assert(std::is_same<uint64_or_128_t<UInt>, UInt>::value, "");
|
|
const auto sep_size = 1;
|
|
std::string groups = grouping<Char>(loc);
|
|
if (groups.empty()) return false;
|
|
auto sep = thousands_sep<Char>(loc);
|
|
if (!sep) return false;
|
|
int num_digits = count_digits(value);
|
|
int size = num_digits, n = num_digits;
|
|
std::string::const_iterator group = groups.cbegin();
|
|
while (group != groups.cend() && n > *group && *group > 0 &&
|
|
*group != max_value<char>()) {
|
|
size += sep_size;
|
|
n -= *group;
|
|
++group;
|
|
}
|
|
if (group == groups.cend()) size += sep_size * ((n - 1) / groups.back());
|
|
char digits[40];
|
|
format_decimal(digits, value, num_digits);
|
|
basic_memory_buffer<Char> buffer;
|
|
if (prefix != 0) ++size;
|
|
const auto usize = to_unsigned(size);
|
|
buffer.resize(usize);
|
|
basic_string_view<Char> s(&sep, sep_size);
|
|
// Index of a decimal digit with the least significant digit having index 0.
|
|
int digit_index = 0;
|
|
group = groups.cbegin();
|
|
auto p = buffer.data() + size - 1;
|
|
for (int i = num_digits - 1; i > 0; --i) {
|
|
*p-- = static_cast<Char>(digits[i]);
|
|
if (*group <= 0 || ++digit_index % *group != 0 ||
|
|
*group == max_value<char>())
|
|
continue;
|
|
if (group + 1 != groups.cend()) {
|
|
digit_index = 0;
|
|
++group;
|
|
}
|
|
std::uninitialized_copy(s.data(), s.data() + s.size(),
|
|
make_checked(p, s.size()));
|
|
p -= s.size();
|
|
}
|
|
*p-- = static_cast<Char>(*digits);
|
|
if (prefix != 0) *p = static_cast<Char>(prefix);
|
|
auto data = buffer.data();
|
|
out = write_padded<align::right>(
|
|
out, specs, usize, usize, [=](reserve_iterator<OutputIt> it) {
|
|
return copy_str<Char>(data, data + size, it);
|
|
});
|
|
return true;
|
|
}
|
|
|
|
FMT_CONSTEXPR inline void prefix_append(unsigned& prefix, unsigned value) {
|
|
prefix |= prefix != 0 ? value << 8 : value;
|
|
prefix += (1u + (value > 0xff ? 1 : 0)) << 24;
|
|
}
|
|
|
|
template <typename OutputIt, typename T, typename Char>
|
|
FMT_CONSTEXPR OutputIt write_int(OutputIt out, T value,
|
|
const basic_format_specs<Char>& specs,
|
|
locale_ref loc) {
|
|
auto prefix = 0u;
|
|
auto abs_value = static_cast<uint32_or_64_or_128_t<T>>(value);
|
|
if (is_negative(value)) {
|
|
prefix = 0x01000000 | '-';
|
|
abs_value = 0 - abs_value;
|
|
} else {
|
|
prefix = data::prefixes[specs.sign];
|
|
}
|
|
auto utype = static_cast<unsigned>(specs.type);
|
|
switch (specs.type) {
|
|
case 0:
|
|
case 'd': {
|
|
if (specs.localized &&
|
|
write_int_localized(out, static_cast<uint64_or_128_t<T>>(abs_value),
|
|
prefix, specs, loc)) {
|
|
return out;
|
|
}
|
|
auto num_digits = count_digits(abs_value);
|
|
return write_int(
|
|
out, num_digits, prefix, specs, [=](reserve_iterator<OutputIt> it) {
|
|
return format_decimal<Char>(it, abs_value, num_digits).end;
|
|
});
|
|
}
|
|
case 'x':
|
|
case 'X': {
|
|
if (specs.alt) prefix_append(prefix, (utype << 8) | '0');
|
|
bool upper = specs.type != 'x';
|
|
int num_digits = count_digits<4>(abs_value);
|
|
return write_int(
|
|
out, num_digits, prefix, specs, [=](reserve_iterator<OutputIt> it) {
|
|
return format_uint<4, Char>(it, abs_value, num_digits, upper);
|
|
});
|
|
}
|
|
case 'b':
|
|
case 'B': {
|
|
if (specs.alt) prefix_append(prefix, (utype << 8) | '0');
|
|
int num_digits = count_digits<1>(abs_value);
|
|
return write_int(out, num_digits, prefix, specs,
|
|
[=](reserve_iterator<OutputIt> it) {
|
|
return format_uint<1, Char>(it, abs_value, num_digits);
|
|
});
|
|
}
|
|
case 'o': {
|
|
int num_digits = count_digits<3>(abs_value);
|
|
if (specs.alt && specs.precision <= num_digits && abs_value != 0) {
|
|
// Octal prefix '0' is counted as a digit, so only add it if precision
|
|
// is not greater than the number of digits.
|
|
prefix_append(prefix, '0');
|
|
}
|
|
return write_int(out, num_digits, prefix, specs,
|
|
[=](reserve_iterator<OutputIt> it) {
|
|
return format_uint<3, Char>(it, abs_value, num_digits);
|
|
});
|
|
}
|
|
#ifdef FMT_DEPRECATED_N_SPECIFIER
|
|
case 'n':
|
|
return write_int_localized(out, abs_value, prefix, specs, loc);
|
|
#endif
|
|
case 'c':
|
|
return write_char(out, static_cast<Char>(abs_value), specs);
|
|
default:
|
|
FMT_THROW(format_error("invalid type specifier"));
|
|
}
|
|
return out;
|
|
}
|
|
|
|
template <typename OutputIt, typename StrChar, typename Char>
|
|
FMT_CONSTEXPR OutputIt write(OutputIt out, basic_string_view<StrChar> s,
|
|
const basic_format_specs<Char>& specs) {
|
|
auto data = s.data();
|
|
auto size = s.size();
|
|
if (specs.precision >= 0 && to_unsigned(specs.precision) < size)
|
|
size = code_point_index(s, to_unsigned(specs.precision));
|
|
auto width = specs.width != 0
|
|
? compute_width(basic_string_view<StrChar>(data, size))
|
|
: 0;
|
|
return write_padded(out, specs, size, width,
|
|
[=](reserve_iterator<OutputIt> it) {
|
|
return copy_str<Char>(data, data + size, it);
|
|
});
|
|
}
|
|
|
|
template <typename Char, typename OutputIt>
|
|
OutputIt write_nonfinite(OutputIt out, bool isinf,
|
|
const basic_format_specs<Char>& specs,
|
|
const float_specs& fspecs) {
|
|
auto str =
|
|
isinf ? (fspecs.upper ? "INF" : "inf") : (fspecs.upper ? "NAN" : "nan");
|
|
constexpr size_t str_size = 3;
|
|
auto sign = fspecs.sign;
|
|
auto size = str_size + (sign ? 1 : 0);
|
|
return write_padded(out, specs, size, [=](reserve_iterator<OutputIt> it) {
|
|
if (sign) *it++ = static_cast<Char>(data::signs[sign]);
|
|
return copy_str<Char>(str, str + str_size, it);
|
|
});
|
|
}
|
|
|
|
// A decimal floating-point number significand * pow(10, exp).
|
|
struct big_decimal_fp {
|
|
const char* significand;
|
|
int significand_size;
|
|
int exponent;
|
|
};
|
|
|
|
inline int get_significand_size(const big_decimal_fp& fp) {
|
|
return fp.significand_size;
|
|
}
|
|
template <typename T>
|
|
inline int get_significand_size(const dragonbox::decimal_fp<T>& fp) {
|
|
return count_digits(fp.significand);
|
|
}
|
|
|
|
template <typename Char, typename OutputIt>
|
|
inline OutputIt write_significand(OutputIt out, const char* significand,
|
|
int& significand_size) {
|
|
return copy_str<Char>(significand, significand + significand_size, out);
|
|
}
|
|
template <typename Char, typename OutputIt, typename UInt>
|
|
inline OutputIt write_significand(OutputIt out, UInt significand,
|
|
int significand_size) {
|
|
return format_decimal<Char>(out, significand, significand_size).end;
|
|
}
|
|
|
|
template <typename Char, typename UInt,
|
|
FMT_ENABLE_IF(std::is_integral<UInt>::value)>
|
|
inline Char* write_significand(Char* out, UInt significand,
|
|
int significand_size, int integral_size,
|
|
Char decimal_point) {
|
|
if (!decimal_point)
|
|
return format_decimal(out, significand, significand_size).end;
|
|
auto end = format_decimal(out + 1, significand, significand_size).end;
|
|
if (integral_size == 1)
|
|
out[0] = out[1];
|
|
else
|
|
std::uninitialized_copy_n(out + 1, integral_size, out);
|
|
out[integral_size] = decimal_point;
|
|
return end;
|
|
}
|
|
|
|
template <typename OutputIt, typename UInt, typename Char,
|
|
FMT_ENABLE_IF(!std::is_pointer<remove_cvref_t<OutputIt>>::value)>
|
|
inline OutputIt write_significand(OutputIt out, UInt significand,
|
|
int significand_size, int integral_size,
|
|
Char decimal_point) {
|
|
// Buffer is large enough to hold digits (digits10 + 1) and a decimal point.
|
|
Char buffer[digits10<UInt>() + 2];
|
|
auto end = write_significand(buffer, significand, significand_size,
|
|
integral_size, decimal_point);
|
|
return detail::copy_str<Char>(buffer, end, out);
|
|
}
|
|
|
|
template <typename OutputIt, typename Char>
|
|
inline OutputIt write_significand(OutputIt out, const char* significand,
|
|
int significand_size, int integral_size,
|
|
Char decimal_point) {
|
|
out = detail::copy_str<Char>(significand, significand + integral_size, out);
|
|
if (!decimal_point) return out;
|
|
*out++ = decimal_point;
|
|
return detail::copy_str<Char>(significand + integral_size,
|
|
significand + significand_size, out);
|
|
}
|
|
|
|
template <typename OutputIt, typename DecimalFP, typename Char>
|
|
OutputIt write_float(OutputIt out, const DecimalFP& fp,
|
|
const basic_format_specs<Char>& specs, float_specs fspecs,
|
|
Char decimal_point) {
|
|
auto significand = fp.significand;
|
|
int significand_size = get_significand_size(fp);
|
|
static const Char zero = static_cast<Char>('0');
|
|
auto sign = fspecs.sign;
|
|
size_t size = to_unsigned(significand_size) + (sign ? 1 : 0);
|
|
using iterator = reserve_iterator<OutputIt>;
|
|
|
|
int output_exp = fp.exponent + significand_size - 1;
|
|
auto use_exp_format = [=]() {
|
|
if (fspecs.format == float_format::exp) return true;
|
|
if (fspecs.format != float_format::general) return false;
|
|
// Use the fixed notation if the exponent is in [exp_lower, exp_upper),
|
|
// e.g. 0.0001 instead of 1e-04. Otherwise use the exponent notation.
|
|
const int exp_lower = -4, exp_upper = 16;
|
|
return output_exp < exp_lower ||
|
|
output_exp >= (fspecs.precision > 0 ? fspecs.precision : exp_upper);
|
|
};
|
|
if (use_exp_format()) {
|
|
int num_zeros = 0;
|
|
if (fspecs.showpoint) {
|
|
num_zeros = fspecs.precision - significand_size;
|
|
if (num_zeros < 0) num_zeros = 0;
|
|
size += to_unsigned(num_zeros);
|
|
} else if (significand_size == 1) {
|
|
decimal_point = Char();
|
|
}
|
|
auto abs_output_exp = output_exp >= 0 ? output_exp : -output_exp;
|
|
int exp_digits = 2;
|
|
if (abs_output_exp >= 100) exp_digits = abs_output_exp >= 1000 ? 4 : 3;
|
|
|
|
size += to_unsigned((decimal_point ? 1 : 0) + 2 + exp_digits);
|
|
char exp_char = fspecs.upper ? 'E' : 'e';
|
|
auto write = [=](iterator it) {
|
|
if (sign) *it++ = static_cast<Char>(data::signs[sign]);
|
|
// Insert a decimal point after the first digit and add an exponent.
|
|
it = write_significand(it, significand, significand_size, 1,
|
|
decimal_point);
|
|
if (num_zeros > 0) it = detail::fill_n(it, num_zeros, zero);
|
|
*it++ = static_cast<Char>(exp_char);
|
|
return write_exponent<Char>(output_exp, it);
|
|
};
|
|
return specs.width > 0 ? write_padded<align::right>(out, specs, size, write)
|
|
: base_iterator(out, write(reserve(out, size)));
|
|
}
|
|
|
|
int exp = fp.exponent + significand_size;
|
|
if (fp.exponent >= 0) {
|
|
// 1234e5 -> 123400000[.0+]
|
|
size += to_unsigned(fp.exponent);
|
|
int num_zeros = fspecs.precision - exp;
|
|
#ifdef FMT_FUZZ
|
|
if (num_zeros > 5000)
|
|
throw std::runtime_error("fuzz mode - avoiding excessive cpu use");
|
|
#endif
|
|
if (fspecs.showpoint) {
|
|
if (num_zeros <= 0 && fspecs.format != float_format::fixed) num_zeros = 1;
|
|
if (num_zeros > 0) size += to_unsigned(num_zeros) + 1;
|
|
}
|
|
return write_padded<align::right>(out, specs, size, [&](iterator it) {
|
|
if (sign) *it++ = static_cast<Char>(data::signs[sign]);
|
|
it = write_significand<Char>(it, significand, significand_size);
|
|
it = detail::fill_n(it, fp.exponent, zero);
|
|
if (!fspecs.showpoint) return it;
|
|
*it++ = decimal_point;
|
|
return num_zeros > 0 ? detail::fill_n(it, num_zeros, zero) : it;
|
|
});
|
|
} else if (exp > 0) {
|
|
// 1234e-2 -> 12.34[0+]
|
|
int num_zeros = fspecs.showpoint ? fspecs.precision - significand_size : 0;
|
|
size += 1 + to_unsigned(num_zeros > 0 ? num_zeros : 0);
|
|
return write_padded<align::right>(out, specs, size, [&](iterator it) {
|
|
if (sign) *it++ = static_cast<Char>(data::signs[sign]);
|
|
it = write_significand(it, significand, significand_size, exp,
|
|
decimal_point);
|
|
return num_zeros > 0 ? detail::fill_n(it, num_zeros, zero) : it;
|
|
});
|
|
}
|
|
// 1234e-6 -> 0.001234
|
|
int num_zeros = -exp;
|
|
if (significand_size == 0 && fspecs.precision >= 0 &&
|
|
fspecs.precision < num_zeros) {
|
|
num_zeros = fspecs.precision;
|
|
}
|
|
bool pointy = num_zeros != 0 || significand_size != 0 || fspecs.showpoint;
|
|
size += 1 + (pointy ? 1 : 0) + to_unsigned(num_zeros);
|
|
return write_padded<align::right>(out, specs, size, [&](iterator it) {
|
|
if (sign) *it++ = static_cast<Char>(data::signs[sign]);
|
|
*it++ = zero;
|
|
if (!pointy) return it;
|
|
*it++ = decimal_point;
|
|
it = detail::fill_n(it, num_zeros, zero);
|
|
return write_significand<Char>(it, significand, significand_size);
|
|
});
|
|
}
|
|
|
|
template <typename Char, typename OutputIt, typename T,
|
|
FMT_ENABLE_IF(std::is_floating_point<T>::value)>
|
|
OutputIt write(OutputIt out, T value, basic_format_specs<Char> specs,
|
|
locale_ref loc = {}) {
|
|
if (const_check(!is_supported_floating_point(value))) return out;
|
|
float_specs fspecs = parse_float_type_spec(specs);
|
|
fspecs.sign = specs.sign;
|
|
if (std::signbit(value)) { // value < 0 is false for NaN so use signbit.
|
|
fspecs.sign = sign::minus;
|
|
value = -value;
|
|
} else if (fspecs.sign == sign::minus) {
|
|
fspecs.sign = sign::none;
|
|
}
|
|
|
|
if (!std::isfinite(value))
|
|
return write_nonfinite(out, std::isinf(value), specs, fspecs);
|
|
|
|
if (specs.align == align::numeric && fspecs.sign) {
|
|
auto it = reserve(out, 1);
|
|
*it++ = static_cast<Char>(data::signs[fspecs.sign]);
|
|
out = base_iterator(out, it);
|
|
fspecs.sign = sign::none;
|
|
if (specs.width != 0) --specs.width;
|
|
}
|
|
|
|
memory_buffer buffer;
|
|
if (fspecs.format == float_format::hex) {
|
|
if (fspecs.sign) buffer.push_back(data::signs[fspecs.sign]);
|
|
snprintf_float(promote_float(value), specs.precision, fspecs, buffer);
|
|
return write_bytes(out, {buffer.data(), buffer.size()}, specs);
|
|
}
|
|
int precision = specs.precision >= 0 || !specs.type ? specs.precision : 6;
|
|
if (fspecs.format == float_format::exp) {
|
|
if (precision == max_value<int>())
|
|
FMT_THROW(format_error("number is too big"));
|
|
else
|
|
++precision;
|
|
}
|
|
if (const_check(std::is_same<T, float>())) fspecs.binary32 = true;
|
|
fspecs.use_grisu = is_fast_float<T>();
|
|
int exp = format_float(promote_float(value), precision, fspecs, buffer);
|
|
fspecs.precision = precision;
|
|
Char point =
|
|
fspecs.locale ? decimal_point<Char>(loc) : static_cast<Char>('.');
|
|
auto fp = big_decimal_fp{buffer.data(), static_cast<int>(buffer.size()), exp};
|
|
return write_float(out, fp, specs, fspecs, point);
|
|
}
|
|
|
|
template <typename Char, typename OutputIt, typename T,
|
|
FMT_ENABLE_IF(is_fast_float<T>::value)>
|
|
OutputIt write(OutputIt out, T value) {
|
|
if (const_check(!is_supported_floating_point(value))) return out;
|
|
|
|
using floaty = conditional_t<std::is_same<T, long double>::value, double, T>;
|
|
using uint = typename dragonbox::float_info<floaty>::carrier_uint;
|
|
auto bits = bit_cast<uint>(value);
|
|
|
|
auto fspecs = float_specs();
|
|
auto sign_bit = bits & (uint(1) << (num_bits<uint>() - 1));
|
|
if (sign_bit != 0) {
|
|
fspecs.sign = sign::minus;
|
|
value = -value;
|
|
}
|
|
|
|
static const auto specs = basic_format_specs<Char>();
|
|
uint mask = exponent_mask<floaty>();
|
|
if ((bits & mask) == mask)
|
|
return write_nonfinite(out, std::isinf(value), specs, fspecs);
|
|
|
|
auto dec = dragonbox::to_decimal(static_cast<floaty>(value));
|
|
return write_float(out, dec, specs, fspecs, static_cast<Char>('.'));
|
|
}
|
|
|
|
template <typename Char, typename OutputIt, typename T,
|
|
FMT_ENABLE_IF(std::is_floating_point<T>::value &&
|
|
!is_fast_float<T>::value)>
|
|
inline OutputIt write(OutputIt out, T value) {
|
|
return write(out, value, basic_format_specs<Char>());
|
|
}
|
|
|
|
template <typename Char, typename OutputIt, typename UIntPtr>
|
|
OutputIt write_ptr(OutputIt out, UIntPtr value,
|
|
const basic_format_specs<Char>* specs) {
|
|
int num_digits = count_digits<4>(value);
|
|
auto size = to_unsigned(num_digits) + size_t(2);
|
|
auto write = [=](reserve_iterator<OutputIt> it) {
|
|
*it++ = static_cast<Char>('0');
|
|
*it++ = static_cast<Char>('x');
|
|
return format_uint<4, Char>(it, value, num_digits);
|
|
};
|
|
return specs ? write_padded<align::right>(out, *specs, size, write)
|
|
: base_iterator(out, write(reserve(out, size)));
|
|
}
|
|
|
|
template <typename T> struct is_integral : std::is_integral<T> {};
|
|
template <> struct is_integral<int128_t> : std::true_type {};
|
|
template <> struct is_integral<uint128_t> : std::true_type {};
|
|
|
|
template <typename Char, typename OutputIt>
|
|
OutputIt write(OutputIt out, monostate) {
|
|
FMT_ASSERT(false, "");
|
|
return out;
|
|
}
|
|
|
|
template <typename Char, typename OutputIt,
|
|
FMT_ENABLE_IF(!std::is_same<Char, char>::value)>
|
|
OutputIt write(OutputIt out, string_view value) {
|
|
auto it = reserve(out, value.size());
|
|
it = copy_str<Char>(value.begin(), value.end(), it);
|
|
return base_iterator(out, it);
|
|
}
|
|
|
|
template <typename Char, typename OutputIt>
|
|
FMT_CONSTEXPR OutputIt write(OutputIt out, basic_string_view<Char> value) {
|
|
auto it = reserve(out, value.size());
|
|
it = copy_str<Char>(value.begin(), value.end(), it);
|
|
return base_iterator(out, it);
|
|
}
|
|
|
|
template <typename Char, typename OutputIt, typename T,
|
|
FMT_ENABLE_IF(is_string<T>::value)>
|
|
constexpr OutputIt write(OutputIt out, const T& value) {
|
|
return write<Char>(out, to_string_view(value));
|
|
}
|
|
|
|
template <typename Char, typename OutputIt, typename T,
|
|
FMT_ENABLE_IF(is_integral<T>::value &&
|
|
!std::is_same<T, bool>::value &&
|
|
!std::is_same<T, Char>::value)>
|
|
FMT_CONSTEXPR OutputIt write(OutputIt out, T value) {
|
|
auto abs_value = static_cast<uint32_or_64_or_128_t<T>>(value);
|
|
bool negative = is_negative(value);
|
|
// Don't do -abs_value since it trips unsigned-integer-overflow sanitizer.
|
|
if (negative) abs_value = ~abs_value + 1;
|
|
int num_digits = count_digits(abs_value);
|
|
auto size = (negative ? 1 : 0) + static_cast<size_t>(num_digits);
|
|
auto it = reserve(out, size);
|
|
if (auto ptr = to_pointer<Char>(it, size)) {
|
|
if (negative) *ptr++ = static_cast<Char>('-');
|
|
format_decimal<Char>(ptr, abs_value, num_digits);
|
|
return out;
|
|
}
|
|
if (negative) *it++ = static_cast<Char>('-');
|
|
it = format_decimal<Char>(it, abs_value, num_digits).end;
|
|
return base_iterator(out, it);
|
|
}
|
|
|
|
// FMT_ENABLE_IF() condition separated to workaround MSVC bug
|
|
template <
|
|
typename Char, typename OutputIt, typename T,
|
|
bool check =
|
|
std::is_enum<T>::value && !std::is_same<T, Char>::value &&
|
|
mapped_type_constant<T, basic_format_context<OutputIt, Char>>::value !=
|
|
type::custom_type,
|
|
FMT_ENABLE_IF(check)>
|
|
FMT_CONSTEXPR OutputIt write(OutputIt out, T value) {
|
|
return write<Char>(
|
|
out, static_cast<typename std::underlying_type<T>::type>(value));
|
|
}
|
|
|
|
template <typename Char, typename OutputIt>
|
|
constexpr OutputIt write(OutputIt out, bool value) {
|
|
return write<Char>(out, string_view(value ? "true" : "false"));
|
|
}
|
|
|
|
template <typename Char, typename OutputIt>
|
|
FMT_CONSTEXPR OutputIt write(OutputIt out, Char value) {
|
|
auto it = reserve(out, 1);
|
|
*it++ = value;
|
|
return base_iterator(out, it);
|
|
}
|
|
|
|
template <typename Char, typename OutputIt>
|
|
FMT_CONSTEXPR OutputIt write(OutputIt out, const Char* value) {
|
|
if (!value) {
|
|
FMT_THROW(format_error("string pointer is null"));
|
|
} else {
|
|
auto length = std::char_traits<Char>::length(value);
|
|
out = write(out, basic_string_view<Char>(value, length));
|
|
}
|
|
return out;
|
|
}
|
|
|
|
template <typename Char, typename OutputIt>
|
|
OutputIt write(OutputIt out, const void* value) {
|
|
return write_ptr<Char>(out, to_uintptr(value), nullptr);
|
|
}
|
|
|
|
template <typename Char, typename OutputIt, typename T>
|
|
auto write(OutputIt out, const T& value) -> typename std::enable_if<
|
|
mapped_type_constant<T, basic_format_context<OutputIt, Char>>::value ==
|
|
type::custom_type,
|
|
OutputIt>::type {
|
|
using context_type = basic_format_context<OutputIt, Char>;
|
|
using formatter_type =
|
|
conditional_t<has_formatter<T, context_type>::value,
|
|
typename context_type::template formatter_type<T>,
|
|
fallback_formatter<T, Char>>;
|
|
context_type ctx(out, {}, {});
|
|
return formatter_type().format(value, ctx);
|
|
}
|
|
|
|
// An argument visitor that formats the argument and writes it via the output
|
|
// iterator. It's a class and not a generic lambda for compatibility with C++11.
|
|
template <typename OutputIt, typename Char> struct default_arg_formatter {
|
|
using context = basic_format_context<OutputIt, Char>;
|
|
|
|
OutputIt out;
|
|
basic_format_args<context> args;
|
|
locale_ref loc;
|
|
|
|
template <typename T> OutputIt operator()(T value) {
|
|
return write<Char>(out, value);
|
|
}
|
|
|
|
OutputIt operator()(typename basic_format_arg<context>::handle handle) {
|
|
basic_format_parse_context<Char> parse_ctx({});
|
|
basic_format_context<OutputIt, Char> format_ctx(out, args, loc);
|
|
handle.format(parse_ctx, format_ctx);
|
|
return format_ctx.out();
|
|
}
|
|
};
|
|
|
|
template <typename OutputIt, typename Char,
|
|
typename ErrorHandler = error_handler>
|
|
class arg_formatter_base {
|
|
public:
|
|
using iterator = OutputIt;
|
|
using char_type = Char;
|
|
using format_specs = basic_format_specs<Char>;
|
|
|
|
private:
|
|
iterator out_;
|
|
const format_specs& specs_;
|
|
locale_ref locale_;
|
|
|
|
// Attempts to reserve space for n extra characters in the output range.
|
|
// Returns a pointer to the reserved range or a reference to out_.
|
|
auto reserve(size_t n) -> decltype(detail::reserve(out_, n)) {
|
|
return detail::reserve(out_, n);
|
|
}
|
|
|
|
void write(char value) {
|
|
auto&& it = reserve(1);
|
|
*it++ = value;
|
|
}
|
|
|
|
template <typename Ch, FMT_ENABLE_IF(std::is_same<Ch, Char>::value)>
|
|
void write(Ch value) {
|
|
out_ = detail::write<Char>(out_, value);
|
|
}
|
|
|
|
void write(string_view value) {
|
|
auto&& it = reserve(value.size());
|
|
it = copy_str<Char>(value.begin(), value.end(), it);
|
|
}
|
|
void write(wstring_view value) {
|
|
static_assert(std::is_same<Char, wchar_t>::value, "");
|
|
auto&& it = reserve(value.size());
|
|
it = copy_str<Char>(value.begin(), value.end(), it);
|
|
}
|
|
|
|
template <typename Ch>
|
|
void write(const Ch* s, size_t size, const format_specs& specs) {
|
|
auto width =
|
|
specs.width != 0 ? compute_width(basic_string_view<Ch>(s, size)) : 0;
|
|
out_ = write_padded(out_, specs, size, width,
|
|
[=](reserve_iterator<OutputIt> it) {
|
|
return copy_str<Char>(s, s + size, it);
|
|
});
|
|
}
|
|
|
|
template <typename Ch>
|
|
FMT_CONSTEXPR void write(basic_string_view<Ch> s,
|
|
const format_specs& specs = {}) {
|
|
out_ = detail::write(out_, s, specs);
|
|
}
|
|
|
|
void write_pointer(const void* p) {
|
|
out_ = write_ptr<char_type>(out_, to_uintptr(p), &specs_);
|
|
}
|
|
|
|
struct char_spec_handler : ErrorHandler {
|
|
arg_formatter_base& formatter;
|
|
Char value;
|
|
|
|
constexpr char_spec_handler(arg_formatter_base& f, Char val)
|
|
: formatter(f), value(val) {}
|
|
|
|
FMT_CONSTEXPR void on_int() {
|
|
// char is only formatted as int if there are specs.
|
|
formatter.out_ =
|
|
detail::write_int(formatter.out_, static_cast<int>(value),
|
|
formatter.specs_, formatter.locale_);
|
|
}
|
|
FMT_CONSTEXPR void on_char() {
|
|
formatter.out_ = write_char(formatter.out_, value, formatter.specs_);
|
|
}
|
|
};
|
|
|
|
struct cstring_spec_handler : error_handler {
|
|
arg_formatter_base& formatter;
|
|
const Char* value;
|
|
|
|
cstring_spec_handler(arg_formatter_base& f, const Char* val)
|
|
: formatter(f), value(val) {}
|
|
|
|
void on_string() { formatter.write(value); }
|
|
void on_pointer() { formatter.write_pointer(value); }
|
|
};
|
|
|
|
protected:
|
|
iterator out() { return out_; }
|
|
const format_specs& specs() { return specs_; }
|
|
|
|
FMT_CONSTEXPR void write(bool value) {
|
|
write(string_view(value ? "true" : "false"), specs_);
|
|
}
|
|
|
|
void write(const Char* value) {
|
|
if (value)
|
|
write(basic_string_view<char_type>(value), specs_);
|
|
else
|
|
FMT_THROW(format_error("string pointer is null"));
|
|
}
|
|
|
|
public:
|
|
constexpr arg_formatter_base(OutputIt out, const format_specs& s, locale_ref loc)
|
|
: out_(out), specs_(s), locale_(loc) {}
|
|
|
|
iterator operator()(monostate) {
|
|
FMT_ASSERT(false, "invalid argument type");
|
|
return out_;
|
|
}
|
|
|
|
template <typename T, FMT_ENABLE_IF(is_integral<T>::value)>
|
|
FMT_CONSTEXPR FMT_INLINE iterator operator()(T value) {
|
|
return out_ = detail::write_int(out_, value, specs_, locale_);
|
|
}
|
|
|
|
FMT_CONSTEXPR iterator operator()(Char value) {
|
|
handle_char_specs(specs_,
|
|
char_spec_handler(*this, static_cast<Char>(value)));
|
|
return out_;
|
|
}
|
|
|
|
FMT_CONSTEXPR iterator operator()(bool value) {
|
|
if (specs_.type && specs_.type != 's') return (*this)(value ? 1 : 0);
|
|
write(value != 0);
|
|
return out_;
|
|
}
|
|
|
|
template <typename T, FMT_ENABLE_IF(std::is_floating_point<T>::value)>
|
|
iterator operator()(T value) {
|
|
if (const_check(is_supported_floating_point(value)))
|
|
out_ = detail::write(out_, value, specs_, locale_);
|
|
else
|
|
FMT_ASSERT(false, "unsupported float argument type");
|
|
return out_;
|
|
}
|
|
|
|
iterator operator()(const Char* value) {
|
|
handle_cstring_type_spec(specs_.type, cstring_spec_handler(*this, value));
|
|
return out_;
|
|
}
|
|
|
|
FMT_CONSTEXPR iterator operator()(basic_string_view<Char> value) {
|
|
check_string_type_spec(specs_.type, error_handler());
|
|
write(value, specs_);
|
|
return out_;
|
|
}
|
|
|
|
iterator operator()(const void* value) {
|
|
check_pointer_type_spec(specs_.type, error_handler());
|
|
write_pointer(value);
|
|
return out_;
|
|
}
|
|
};
|
|
|
|
/** The default argument formatter. */
|
|
template <typename OutputIt, typename Char>
|
|
class arg_formatter : public arg_formatter_base<OutputIt, Char> {
|
|
private:
|
|
using char_type = Char;
|
|
using base = arg_formatter_base<OutputIt, Char>;
|
|
using context_type = basic_format_context<OutputIt, Char>;
|
|
|
|
context_type& ctx_;
|
|
|
|
public:
|
|
using iterator = typename base::iterator;
|
|
using format_specs = typename base::format_specs;
|
|
|
|
/**
|
|
\rst
|
|
Constructs an argument formatter object.
|
|
*ctx* is a reference to the formatting context,
|
|
*specs* contains format specifier information for standard argument types.
|
|
\endrst
|
|
*/
|
|
constexpr explicit arg_formatter(context_type& ctx, const format_specs& specs)
|
|
: base(ctx.out(), specs, ctx.locale()), ctx_(ctx) {}
|
|
|
|
using base::operator();
|
|
|
|
iterator operator()(typename basic_format_arg<context_type>::handle) {
|
|
// User-defined types are handled separately because they require access to
|
|
// the parse context.
|
|
return ctx_.out();
|
|
}
|
|
};
|
|
|
|
template <typename Char> FMT_CONSTEXPR bool is_name_start(Char c) {
|
|
return ('a' <= c && c <= 'z') || ('A' <= c && c <= 'Z') || '_' == c;
|
|
}
|
|
|
|
// Parses the range [begin, end) as an unsigned integer. This function assumes
|
|
// that the range is non-empty and the first character is a digit.
|
|
template <typename Char, typename ErrorHandler>
|
|
FMT_CONSTEXPR int parse_nonnegative_int(const Char*& begin, const Char* end,
|
|
ErrorHandler&& eh) {
|
|
FMT_ASSERT(begin != end && '0' <= *begin && *begin <= '9', "");
|
|
unsigned value = 0;
|
|
// Convert to unsigned to prevent a warning.
|
|
constexpr unsigned max_int = max_value<int>();
|
|
unsigned big = max_int / 10;
|
|
do {
|
|
// Check for overflow.
|
|
if (value > big) {
|
|
value = max_int + 1;
|
|
break;
|
|
}
|
|
value = value * 10 + unsigned(*begin - '0');
|
|
++begin;
|
|
} while (begin != end && '0' <= *begin && *begin <= '9');
|
|
if (value > max_int) eh.on_error("number is too big");
|
|
return static_cast<int>(value);
|
|
}
|
|
|
|
template <typename Context> class custom_formatter {
|
|
private:
|
|
using char_type = typename Context::char_type;
|
|
|
|
basic_format_parse_context<char_type>& parse_ctx_;
|
|
Context& ctx_;
|
|
|
|
public:
|
|
explicit custom_formatter(basic_format_parse_context<char_type>& parse_ctx,
|
|
Context& ctx)
|
|
: parse_ctx_(parse_ctx), ctx_(ctx) {}
|
|
|
|
void operator()(typename basic_format_arg<Context>::handle h) const {
|
|
h.format(parse_ctx_, ctx_);
|
|
}
|
|
|
|
template <typename T> void operator()(T) const {}
|
|
};
|
|
|
|
template <typename T>
|
|
using is_integer =
|
|
bool_constant<is_integral<T>::value && !std::is_same<T, bool>::value &&
|
|
!std::is_same<T, char>::value &&
|
|
!std::is_same<T, wchar_t>::value>;
|
|
|
|
template <typename ErrorHandler> class width_checker {
|
|
public:
|
|
explicit FMT_CONSTEXPR width_checker(ErrorHandler& eh) : handler_(eh) {}
|
|
|
|
template <typename T, FMT_ENABLE_IF(is_integer<T>::value)>
|
|
FMT_CONSTEXPR unsigned long long operator()(T value) {
|
|
if (is_negative(value)) handler_.on_error("negative width");
|
|
return static_cast<unsigned long long>(value);
|
|
}
|
|
|
|
template <typename T, FMT_ENABLE_IF(!is_integer<T>::value)>
|
|
FMT_CONSTEXPR unsigned long long operator()(T) {
|
|
handler_.on_error("width is not integer");
|
|
return 0;
|
|
}
|
|
|
|
private:
|
|
ErrorHandler& handler_;
|
|
};
|
|
|
|
template <typename ErrorHandler> class precision_checker {
|
|
public:
|
|
explicit FMT_CONSTEXPR precision_checker(ErrorHandler& eh) : handler_(eh) {}
|
|
|
|
template <typename T, FMT_ENABLE_IF(is_integer<T>::value)>
|
|
FMT_CONSTEXPR unsigned long long operator()(T value) {
|
|
if (is_negative(value)) handler_.on_error("negative precision");
|
|
return static_cast<unsigned long long>(value);
|
|
}
|
|
|
|
template <typename T, FMT_ENABLE_IF(!is_integer<T>::value)>
|
|
FMT_CONSTEXPR unsigned long long operator()(T) {
|
|
handler_.on_error("precision is not integer");
|
|
return 0;
|
|
}
|
|
|
|
private:
|
|
ErrorHandler& handler_;
|
|
};
|
|
|
|
// A format specifier handler that sets fields in basic_format_specs.
|
|
template <typename Char> class specs_setter {
|
|
public:
|
|
explicit FMT_CONSTEXPR specs_setter(basic_format_specs<Char>& specs)
|
|
: specs_(specs) {}
|
|
|
|
FMT_CONSTEXPR specs_setter(const specs_setter& other)
|
|
: specs_(other.specs_) {}
|
|
|
|
FMT_CONSTEXPR void on_align(align_t align) { specs_.align = align; }
|
|
FMT_CONSTEXPR void on_fill(basic_string_view<Char> fill) {
|
|
specs_.fill = fill;
|
|
}
|
|
FMT_CONSTEXPR void on_plus() { specs_.sign = sign::plus; }
|
|
FMT_CONSTEXPR void on_minus() { specs_.sign = sign::minus; }
|
|
FMT_CONSTEXPR void on_space() { specs_.sign = sign::space; }
|
|
FMT_CONSTEXPR void on_hash() { specs_.alt = true; }
|
|
FMT_CONSTEXPR void on_localized() { specs_.localized = true; }
|
|
|
|
FMT_CONSTEXPR void on_zero() {
|
|
specs_.align = align::numeric;
|
|
specs_.fill[0] = Char('0');
|
|
}
|
|
|
|
FMT_CONSTEXPR void on_width(int width) { specs_.width = width; }
|
|
FMT_CONSTEXPR void on_precision(int precision) {
|
|
specs_.precision = precision;
|
|
}
|
|
FMT_CONSTEXPR void end_precision() {}
|
|
|
|
FMT_CONSTEXPR void on_type(Char type) {
|
|
specs_.type = static_cast<char>(type);
|
|
}
|
|
|
|
protected:
|
|
basic_format_specs<Char>& specs_;
|
|
};
|
|
|
|
template <typename ErrorHandler> class numeric_specs_checker {
|
|
public:
|
|
FMT_CONSTEXPR numeric_specs_checker(ErrorHandler& eh, detail::type arg_type)
|
|
: error_handler_(eh), arg_type_(arg_type) {}
|
|
|
|
FMT_CONSTEXPR void require_numeric_argument() {
|
|
if (!is_arithmetic_type(arg_type_))
|
|
error_handler_.on_error("format specifier requires numeric argument");
|
|
}
|
|
|
|
FMT_CONSTEXPR void check_sign() {
|
|
require_numeric_argument();
|
|
if (is_integral_type(arg_type_) && arg_type_ != type::int_type &&
|
|
arg_type_ != type::long_long_type && arg_type_ != type::char_type) {
|
|
error_handler_.on_error("format specifier requires signed argument");
|
|
}
|
|
}
|
|
|
|
FMT_CONSTEXPR void check_precision() {
|
|
if (is_integral_type(arg_type_) || arg_type_ == type::pointer_type)
|
|
error_handler_.on_error("precision not allowed for this argument type");
|
|
}
|
|
|
|
private:
|
|
ErrorHandler& error_handler_;
|
|
detail::type arg_type_;
|
|
};
|
|
|
|
// A format specifier handler that checks if specifiers are consistent with the
|
|
// argument type.
|
|
template <typename Handler> class specs_checker : public Handler {
|
|
private:
|
|
numeric_specs_checker<Handler> checker_;
|
|
|
|
// Suppress an MSVC warning about using this in initializer list.
|
|
FMT_CONSTEXPR Handler& error_handler() { return *this; }
|
|
|
|
public:
|
|
FMT_CONSTEXPR specs_checker(const Handler& handler, detail::type arg_type)
|
|
: Handler(handler), checker_(error_handler(), arg_type) {}
|
|
|
|
FMT_CONSTEXPR specs_checker(const specs_checker& other)
|
|
: Handler(other), checker_(error_handler(), other.arg_type_) {}
|
|
|
|
FMT_CONSTEXPR void on_align(align_t align) {
|
|
if (align == align::numeric) checker_.require_numeric_argument();
|
|
Handler::on_align(align);
|
|
}
|
|
|
|
FMT_CONSTEXPR void on_plus() {
|
|
checker_.check_sign();
|
|
Handler::on_plus();
|
|
}
|
|
|
|
FMT_CONSTEXPR void on_minus() {
|
|
checker_.check_sign();
|
|
Handler::on_minus();
|
|
}
|
|
|
|
FMT_CONSTEXPR void on_space() {
|
|
checker_.check_sign();
|
|
Handler::on_space();
|
|
}
|
|
|
|
FMT_CONSTEXPR void on_hash() {
|
|
checker_.require_numeric_argument();
|
|
Handler::on_hash();
|
|
}
|
|
|
|
FMT_CONSTEXPR void on_localized() {
|
|
checker_.require_numeric_argument();
|
|
Handler::on_localized();
|
|
}
|
|
|
|
FMT_CONSTEXPR void on_zero() {
|
|
checker_.require_numeric_argument();
|
|
Handler::on_zero();
|
|
}
|
|
|
|
FMT_CONSTEXPR void end_precision() { checker_.check_precision(); }
|
|
};
|
|
|
|
template <template <typename> class Handler, typename FormatArg,
|
|
typename ErrorHandler>
|
|
FMT_CONSTEXPR int get_dynamic_spec(FormatArg arg, ErrorHandler eh) {
|
|
unsigned long long value = visit_format_arg(Handler<ErrorHandler>(eh), arg);
|
|
if (value > to_unsigned(max_value<int>())) eh.on_error("number is too big");
|
|
return static_cast<int>(value);
|
|
}
|
|
|
|
struct auto_id {};
|
|
|
|
template <typename Context, typename ID>
|
|
FMT_CONSTEXPR typename Context::format_arg get_arg(Context& ctx, ID id) {
|
|
auto arg = ctx.arg(id);
|
|
if (!arg) ctx.on_error("argument not found");
|
|
return arg;
|
|
}
|
|
|
|
// The standard format specifier handler with checking.
|
|
template <typename ParseContext, typename Context>
|
|
class specs_handler : public specs_setter<typename Context::char_type> {
|
|
public:
|
|
using char_type = typename Context::char_type;
|
|
|
|
FMT_CONSTEXPR specs_handler(basic_format_specs<char_type>& specs,
|
|
ParseContext& parse_ctx, Context& ctx)
|
|
: specs_setter<char_type>(specs),
|
|
parse_context_(parse_ctx),
|
|
context_(ctx) {}
|
|
|
|
template <typename Id> FMT_CONSTEXPR void on_dynamic_width(Id arg_id) {
|
|
this->specs_.width = get_dynamic_spec<width_checker>(
|
|
get_arg(arg_id), context_.error_handler());
|
|
}
|
|
|
|
template <typename Id> FMT_CONSTEXPR void on_dynamic_precision(Id arg_id) {
|
|
this->specs_.precision = get_dynamic_spec<precision_checker>(
|
|
get_arg(arg_id), context_.error_handler());
|
|
}
|
|
|
|
void on_error(const char* message) { context_.on_error(message); }
|
|
|
|
private:
|
|
// This is only needed for compatibility with gcc 4.4.
|
|
using format_arg = typename Context::format_arg;
|
|
|
|
FMT_CONSTEXPR format_arg get_arg(auto_id) {
|
|
return detail::get_arg(context_, parse_context_.next_arg_id());
|
|
}
|
|
|
|
FMT_CONSTEXPR format_arg get_arg(int arg_id) {
|
|
parse_context_.check_arg_id(arg_id);
|
|
return detail::get_arg(context_, arg_id);
|
|
}
|
|
|
|
FMT_CONSTEXPR format_arg get_arg(basic_string_view<char_type> arg_id) {
|
|
parse_context_.check_arg_id(arg_id);
|
|
return detail::get_arg(context_, arg_id);
|
|
}
|
|
|
|
ParseContext& parse_context_;
|
|
Context& context_;
|
|
};
|
|
|
|
enum class arg_id_kind { none, index, name };
|
|
|
|
// An argument reference.
|
|
template <typename Char> struct arg_ref {
|
|
FMT_CONSTEXPR arg_ref() : kind(arg_id_kind::none), val() {}
|
|
|
|
FMT_CONSTEXPR explicit arg_ref(int index)
|
|
: kind(arg_id_kind::index), val(index) {}
|
|
FMT_CONSTEXPR explicit arg_ref(basic_string_view<Char> name)
|
|
: kind(arg_id_kind::name), val(name) {}
|
|
|
|
FMT_CONSTEXPR arg_ref& operator=(int idx) {
|
|
kind = arg_id_kind::index;
|
|
val.index = idx;
|
|
return *this;
|
|
}
|
|
|
|
arg_id_kind kind;
|
|
union value {
|
|
FMT_CONSTEXPR value(int id = 0) : index{id} {}
|
|
FMT_CONSTEXPR value(basic_string_view<Char> n) : name(n) {}
|
|
|
|
int index;
|
|
basic_string_view<Char> name;
|
|
} val;
|
|
};
|
|
|
|
// Format specifiers with width and precision resolved at formatting rather
|
|
// than parsing time to allow re-using the same parsed specifiers with
|
|
// different sets of arguments (precompilation of format strings).
|
|
template <typename Char>
|
|
struct dynamic_format_specs : basic_format_specs<Char> {
|
|
arg_ref<Char> width_ref;
|
|
arg_ref<Char> precision_ref;
|
|
};
|
|
|
|
// Format spec handler that saves references to arguments representing dynamic
|
|
// width and precision to be resolved at formatting time.
|
|
template <typename ParseContext>
|
|
class dynamic_specs_handler
|
|
: public specs_setter<typename ParseContext::char_type> {
|
|
public:
|
|
using char_type = typename ParseContext::char_type;
|
|
|
|
FMT_CONSTEXPR dynamic_specs_handler(dynamic_format_specs<char_type>& specs,
|
|
ParseContext& ctx)
|
|
: specs_setter<char_type>(specs), specs_(specs), context_(ctx) {}
|
|
|
|
FMT_CONSTEXPR dynamic_specs_handler(const dynamic_specs_handler& other)
|
|
: specs_setter<char_type>(other),
|
|
specs_(other.specs_),
|
|
context_(other.context_) {}
|
|
|
|
template <typename Id> FMT_CONSTEXPR void on_dynamic_width(Id arg_id) {
|
|
specs_.width_ref = make_arg_ref(arg_id);
|
|
}
|
|
|
|
template <typename Id> FMT_CONSTEXPR void on_dynamic_precision(Id arg_id) {
|
|
specs_.precision_ref = make_arg_ref(arg_id);
|
|
}
|
|
|
|
FMT_CONSTEXPR void on_error(const char* message) {
|
|
context_.on_error(message);
|
|
}
|
|
|
|
private:
|
|
using arg_ref_type = arg_ref<char_type>;
|
|
|
|
FMT_CONSTEXPR arg_ref_type make_arg_ref(int arg_id) {
|
|
context_.check_arg_id(arg_id);
|
|
return arg_ref_type(arg_id);
|
|
}
|
|
|
|
FMT_CONSTEXPR arg_ref_type make_arg_ref(auto_id) {
|
|
return arg_ref_type(context_.next_arg_id());
|
|
}
|
|
|
|
FMT_CONSTEXPR arg_ref_type make_arg_ref(basic_string_view<char_type> arg_id) {
|
|
context_.check_arg_id(arg_id);
|
|
basic_string_view<char_type> format_str(
|
|
context_.begin(), to_unsigned(context_.end() - context_.begin()));
|
|
return arg_ref_type(arg_id);
|
|
}
|
|
|
|
dynamic_format_specs<char_type>& specs_;
|
|
ParseContext& context_;
|
|
};
|
|
|
|
template <typename Char, typename IDHandler>
|
|
FMT_CONSTEXPR const Char* do_parse_arg_id(const Char* begin, const Char* end,
|
|
IDHandler&& handler) {
|
|
FMT_ASSERT(begin != end, "");
|
|
Char c = *begin;
|
|
if (c >= '0' && c <= '9') {
|
|
int index = 0;
|
|
if (c != '0')
|
|
index = parse_nonnegative_int(begin, end, handler);
|
|
else
|
|
++begin;
|
|
if (begin == end || (*begin != '}' && *begin != ':'))
|
|
handler.on_error("invalid format string");
|
|
else
|
|
handler(index);
|
|
return begin;
|
|
}
|
|
if (!is_name_start(c)) {
|
|
handler.on_error("invalid format string");
|
|
return begin;
|
|
}
|
|
auto it = begin;
|
|
do {
|
|
++it;
|
|
} while (it != end && (is_name_start(c = *it) || ('0' <= c && c <= '9')));
|
|
handler(basic_string_view<Char>(begin, to_unsigned(it - begin)));
|
|
return it;
|
|
}
|
|
|
|
template <typename Char, typename IDHandler>
|
|
FMT_CONSTEXPR_DECL FMT_INLINE const Char* parse_arg_id(const Char* begin,
|
|
const Char* end,
|
|
IDHandler&& handler) {
|
|
Char c = *begin;
|
|
if (c != '}' && c != ':') return do_parse_arg_id(begin, end, handler);
|
|
handler();
|
|
return begin;
|
|
}
|
|
|
|
// Adapts SpecHandler to IDHandler API for dynamic width.
|
|
template <typename SpecHandler, typename Char> struct width_adapter {
|
|
explicit FMT_CONSTEXPR width_adapter(SpecHandler& h) : handler(h) {}
|
|
|
|
FMT_CONSTEXPR void operator()() { handler.on_dynamic_width(auto_id()); }
|
|
FMT_CONSTEXPR void operator()(int id) { handler.on_dynamic_width(id); }
|
|
FMT_CONSTEXPR void operator()(basic_string_view<Char> id) {
|
|
handler.on_dynamic_width(id);
|
|
}
|
|
|
|
FMT_CONSTEXPR void on_error(const char* message) {
|
|
handler.on_error(message);
|
|
}
|
|
|
|
SpecHandler& handler;
|
|
};
|
|
|
|
// Adapts SpecHandler to IDHandler API for dynamic precision.
|
|
template <typename SpecHandler, typename Char> struct precision_adapter {
|
|
explicit FMT_CONSTEXPR precision_adapter(SpecHandler& h) : handler(h) {}
|
|
|
|
FMT_CONSTEXPR void operator()() { handler.on_dynamic_precision(auto_id()); }
|
|
FMT_CONSTEXPR void operator()(int id) { handler.on_dynamic_precision(id); }
|
|
FMT_CONSTEXPR void operator()(basic_string_view<Char> id) {
|
|
handler.on_dynamic_precision(id);
|
|
}
|
|
|
|
FMT_CONSTEXPR void on_error(const char* message) {
|
|
handler.on_error(message);
|
|
}
|
|
|
|
SpecHandler& handler;
|
|
};
|
|
|
|
template <typename Char> constexpr bool is_ascii_letter(Char c) {
|
|
return (c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z');
|
|
}
|
|
|
|
// Converts a character to ASCII. Returns a number > 127 on conversion failure.
|
|
template <typename Char, FMT_ENABLE_IF(std::is_integral<Char>::value)>
|
|
constexpr Char to_ascii(Char value) {
|
|
return value;
|
|
}
|
|
template <typename Char, FMT_ENABLE_IF(std::is_enum<Char>::value)>
|
|
constexpr typename std::underlying_type<Char>::type to_ascii(Char value) {
|
|
return value;
|
|
}
|
|
|
|
// Parses fill and alignment.
|
|
template <typename Char, typename Handler>
|
|
FMT_CONSTEXPR const Char* parse_align(const Char* begin, const Char* end,
|
|
Handler&& handler) {
|
|
FMT_ASSERT(begin != end, "");
|
|
auto align = align::none;
|
|
auto p = begin + code_point_length(begin);
|
|
if (p >= end) p = begin;
|
|
for (;;) {
|
|
switch (to_ascii(*p)) {
|
|
case '<':
|
|
align = align::left;
|
|
break;
|
|
case '>':
|
|
align = align::right;
|
|
break;
|
|
#if FMT_DEPRECATED_NUMERIC_ALIGN
|
|
case '=':
|
|
align = align::numeric;
|
|
break;
|
|
#endif
|
|
case '^':
|
|
align = align::center;
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
if (align != align::none) {
|
|
if (p != begin) {
|
|
auto c = *begin;
|
|
if (c == '{')
|
|
return handler.on_error("invalid fill character '{'"), begin;
|
|
handler.on_fill(basic_string_view<Char>(begin, to_unsigned(p - begin)));
|
|
begin = p + 1;
|
|
} else
|
|
++begin;
|
|
handler.on_align(align);
|
|
break;
|
|
} else if (p == begin) {
|
|
break;
|
|
}
|
|
p = begin;
|
|
}
|
|
return begin;
|
|
}
|
|
|
|
template <typename Char, typename Handler>
|
|
FMT_CONSTEXPR const Char* parse_width(const Char* begin, const Char* end,
|
|
Handler&& handler) {
|
|
FMT_ASSERT(begin != end, "");
|
|
if ('0' <= *begin && *begin <= '9') {
|
|
handler.on_width(parse_nonnegative_int(begin, end, handler));
|
|
} else if (*begin == '{') {
|
|
++begin;
|
|
if (begin != end)
|
|
begin = parse_arg_id(begin, end, width_adapter<Handler, Char>(handler));
|
|
if (begin == end || *begin != '}')
|
|
return handler.on_error("invalid format string"), begin;
|
|
++begin;
|
|
}
|
|
return begin;
|
|
}
|
|
|
|
template <typename Char, typename Handler>
|
|
FMT_CONSTEXPR const Char* parse_precision(const Char* begin, const Char* end,
|
|
Handler&& handler) {
|
|
++begin;
|
|
auto c = begin != end ? *begin : Char();
|
|
if ('0' <= c && c <= '9') {
|
|
handler.on_precision(parse_nonnegative_int(begin, end, handler));
|
|
} else if (c == '{') {
|
|
++begin;
|
|
if (begin != end) {
|
|
begin =
|
|
parse_arg_id(begin, end, precision_adapter<Handler, Char>(handler));
|
|
}
|
|
if (begin == end || *begin++ != '}')
|
|
return handler.on_error("invalid format string"), begin;
|
|
} else {
|
|
return handler.on_error("missing precision specifier"), begin;
|
|
}
|
|
handler.end_precision();
|
|
return begin;
|
|
}
|
|
|
|
// Parses standard format specifiers and sends notifications about parsed
|
|
// components to handler.
|
|
template <typename Char, typename SpecHandler>
|
|
FMT_CONSTEXPR_DECL FMT_INLINE const Char* parse_format_specs(
|
|
const Char* begin, const Char* end, SpecHandler&& handler) {
|
|
if (begin + 1 < end && begin[1] == '}' && is_ascii_letter(*begin) &&
|
|
*begin != 'L') {
|
|
handler.on_type(*begin++);
|
|
return begin;
|
|
}
|
|
|
|
if (begin == end) return begin;
|
|
|
|
begin = parse_align(begin, end, handler);
|
|
if (begin == end) return begin;
|
|
|
|
// Parse sign.
|
|
switch (to_ascii(*begin)) {
|
|
case '+':
|
|
handler.on_plus();
|
|
++begin;
|
|
break;
|
|
case '-':
|
|
handler.on_minus();
|
|
++begin;
|
|
break;
|
|
case ' ':
|
|
handler.on_space();
|
|
++begin;
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
if (begin == end) return begin;
|
|
|
|
if (*begin == '#') {
|
|
handler.on_hash();
|
|
if (++begin == end) return begin;
|
|
}
|
|
|
|
// Parse zero flag.
|
|
if (*begin == '0') {
|
|
handler.on_zero();
|
|
if (++begin == end) return begin;
|
|
}
|
|
|
|
begin = parse_width(begin, end, handler);
|
|
if (begin == end) return begin;
|
|
|
|
// Parse precision.
|
|
if (*begin == '.') {
|
|
begin = parse_precision(begin, end, handler);
|
|
if (begin == end) return begin;
|
|
}
|
|
|
|
if (*begin == 'L') {
|
|
handler.on_localized();
|
|
++begin;
|
|
}
|
|
|
|
// Parse type.
|
|
if (begin != end && *begin != '}') handler.on_type(*begin++);
|
|
return begin;
|
|
}
|
|
|
|
// Return the result via the out param to workaround gcc bug 77539.
|
|
template <bool IS_CONSTEXPR, typename T, typename Ptr = const T*>
|
|
FMT_CONSTEXPR bool find(Ptr first, Ptr last, T value, Ptr& out) {
|
|
for (out = first; out != last; ++out) {
|
|
if (*out == value) return true;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
template <>
|
|
inline bool find<false, char>(const char* first, const char* last, char value,
|
|
const char*& out) {
|
|
out = static_cast<const char*>(
|
|
std::memchr(first, value, detail::to_unsigned(last - first)));
|
|
return out != nullptr;
|
|
}
|
|
|
|
template <typename Handler, typename Char> struct id_adapter {
|
|
Handler& handler;
|
|
int arg_id;
|
|
|
|
FMT_CONSTEXPR void operator()() { arg_id = handler.on_arg_id(); }
|
|
FMT_CONSTEXPR void operator()(int id) { arg_id = handler.on_arg_id(id); }
|
|
FMT_CONSTEXPR void operator()(basic_string_view<Char> id) {
|
|
arg_id = handler.on_arg_id(id);
|
|
}
|
|
FMT_CONSTEXPR void on_error(const char* message) {
|
|
handler.on_error(message);
|
|
}
|
|
};
|
|
|
|
template <typename Char, typename Handler>
|
|
FMT_CONSTEXPR const Char* parse_replacement_field(const Char* begin,
|
|
const Char* end,
|
|
Handler&& handler) {
|
|
++begin;
|
|
if (begin == end) return handler.on_error("invalid format string"), end;
|
|
if (*begin == '}') {
|
|
handler.on_replacement_field(handler.on_arg_id(), begin);
|
|
} else if (*begin == '{') {
|
|
handler.on_text(begin, begin + 1);
|
|
} else {
|
|
auto adapter = id_adapter<Handler, Char>{handler, 0};
|
|
begin = parse_arg_id(begin, end, adapter);
|
|
Char c = begin != end ? *begin : Char();
|
|
if (c == '}') {
|
|
handler.on_replacement_field(adapter.arg_id, begin);
|
|
} else if (c == ':') {
|
|
begin = handler.on_format_specs(adapter.arg_id, begin + 1, end);
|
|
if (begin == end || *begin != '}')
|
|
return handler.on_error("unknown format specifier"), end;
|
|
} else {
|
|
return handler.on_error("missing '}' in format string"), end;
|
|
}
|
|
}
|
|
return begin + 1;
|
|
}
|
|
|
|
template <bool IS_CONSTEXPR, typename Char, typename Handler>
|
|
FMT_CONSTEXPR_DECL FMT_INLINE void parse_format_string(
|
|
basic_string_view<Char> format_str, Handler&& handler) {
|
|
auto begin = format_str.data();
|
|
auto end = begin + format_str.size();
|
|
if (end - begin < 32) {
|
|
// Use a simple loop instead of memchr for small strings.
|
|
const Char* p = begin;
|
|
while (p != end) {
|
|
auto c = *p++;
|
|
if (c == '{') {
|
|
handler.on_text(begin, p - 1);
|
|
begin = p = parse_replacement_field(p - 1, end, handler);
|
|
} else if (c == '}') {
|
|
if (p == end || *p != '}')
|
|
return handler.on_error("unmatched '}' in format string");
|
|
handler.on_text(begin, p);
|
|
begin = ++p;
|
|
}
|
|
}
|
|
handler.on_text(begin, end);
|
|
return;
|
|
}
|
|
struct writer {
|
|
FMT_CONSTEXPR void operator()(const Char* pbegin, const Char* pend) {
|
|
if (pbegin == pend) return;
|
|
for (;;) {
|
|
const Char* p = nullptr;
|
|
if (!find<IS_CONSTEXPR>(pbegin, pend, '}', p))
|
|
return handler_.on_text(pbegin, pend);
|
|
++p;
|
|
if (p == pend || *p != '}')
|
|
return handler_.on_error("unmatched '}' in format string");
|
|
handler_.on_text(pbegin, p);
|
|
pbegin = p + 1;
|
|
}
|
|
}
|
|
Handler& handler_;
|
|
} write{handler};
|
|
while (begin != end) {
|
|
// Doing two passes with memchr (one for '{' and another for '}') is up to
|
|
// 2.5x faster than the naive one-pass implementation on big format strings.
|
|
const Char* p = begin;
|
|
if (*begin != '{' && !find<IS_CONSTEXPR>(begin + 1, end, '{', p))
|
|
return write(begin, end);
|
|
write(begin, p);
|
|
begin = parse_replacement_field(p, end, handler);
|
|
}
|
|
}
|
|
|
|
template <typename T, typename ParseContext>
|
|
FMT_CONSTEXPR const typename ParseContext::char_type* parse_format_specs(
|
|
ParseContext& ctx) {
|
|
using char_type = typename ParseContext::char_type;
|
|
using context = buffer_context<char_type>;
|
|
using mapped_type = conditional_t<
|
|
detail::mapped_type_constant<T, context>::value != type::custom_type,
|
|
decltype(arg_mapper<context>().map(std::declval<const T&>())), T>;
|
|
auto f = conditional_t<has_formatter<mapped_type, context>::value,
|
|
formatter<mapped_type, char_type>,
|
|
detail::fallback_formatter<T, char_type>>();
|
|
return f.parse(ctx);
|
|
}
|
|
|
|
template <typename OutputIt, typename Char, typename Context>
|
|
struct format_handler : detail::error_handler {
|
|
basic_format_parse_context<Char> parse_context;
|
|
Context context;
|
|
|
|
format_handler(OutputIt out, basic_string_view<Char> str,
|
|
basic_format_args<Context> format_args, detail::locale_ref loc)
|
|
: parse_context(str), context(out, format_args, loc) {}
|
|
|
|
void on_text(const Char* begin, const Char* end) {
|
|
auto text = basic_string_view<Char>(begin, to_unsigned(end - begin));
|
|
context.advance_to(write<Char>(context.out(), text));
|
|
}
|
|
|
|
int on_arg_id() { return parse_context.next_arg_id(); }
|
|
int on_arg_id(int id) { return parse_context.check_arg_id(id), id; }
|
|
int on_arg_id(basic_string_view<Char> id) {
|
|
int arg_id = context.arg_id(id);
|
|
if (arg_id < 0) on_error("argument not found");
|
|
return arg_id;
|
|
}
|
|
|
|
FMT_INLINE void on_replacement_field(int id, const Char*) {
|
|
auto arg = get_arg(context, id);
|
|
context.advance_to(visit_format_arg(
|
|
default_arg_formatter<OutputIt, Char>{context.out(), context.args(),
|
|
context.locale()},
|
|
arg));
|
|
}
|
|
|
|
const Char* on_format_specs(int id, const Char* begin, const Char* end) {
|
|
auto arg = get_arg(context, id);
|
|
if (arg.type() == type::custom_type) {
|
|
advance_to(parse_context, begin);
|
|
visit_format_arg(custom_formatter<Context>(parse_context, context), arg);
|
|
return parse_context.begin();
|
|
}
|
|
auto specs = basic_format_specs<Char>();
|
|
using parse_context_t = basic_format_parse_context<Char>;
|
|
specs_checker<specs_handler<parse_context_t, Context>> handler(
|
|
specs_handler<parse_context_t, Context>(specs, parse_context, context),
|
|
arg.type());
|
|
begin = parse_format_specs(begin, end, handler);
|
|
if (begin == end || *begin != '}') on_error("missing '}' in format string");
|
|
context.advance_to(
|
|
visit_format_arg(arg_formatter<OutputIt, Char>(context, specs), arg));
|
|
return begin;
|
|
}
|
|
};
|
|
|
|
// A parse context with extra argument id checks. It is only used at compile
|
|
// time because adding checks at runtime would introduce substantial overhead
|
|
// and would be redundant since argument ids are checked when arguments are
|
|
// retrieved anyway.
|
|
template <typename Char, typename ErrorHandler = error_handler>
|
|
class compile_parse_context
|
|
: public basic_format_parse_context<Char, ErrorHandler> {
|
|
private:
|
|
int num_args_;
|
|
using base = basic_format_parse_context<Char, ErrorHandler>;
|
|
|
|
public:
|
|
explicit FMT_CONSTEXPR compile_parse_context(
|
|
basic_string_view<Char> format_str, int num_args = max_value<int>(),
|
|
ErrorHandler eh = {})
|
|
: base(format_str, eh), num_args_(num_args) {}
|
|
|
|
FMT_CONSTEXPR int next_arg_id() {
|
|
int id = base::next_arg_id();
|
|
if (id >= num_args_) this->on_error("argument not found");
|
|
return id;
|
|
}
|
|
|
|
FMT_CONSTEXPR void check_arg_id(int id) {
|
|
base::check_arg_id(id);
|
|
if (id >= num_args_) this->on_error("argument not found");
|
|
}
|
|
using base::check_arg_id;
|
|
};
|
|
|
|
template <typename Char, typename ErrorHandler, typename... Args>
|
|
class format_string_checker {
|
|
public:
|
|
explicit FMT_CONSTEXPR format_string_checker(
|
|
basic_string_view<Char> format_str, ErrorHandler eh)
|
|
: context_(format_str, num_args, eh),
|
|
parse_funcs_{&parse_format_specs<Args, parse_context_type>...} {}
|
|
|
|
FMT_CONSTEXPR void on_text(const Char*, const Char*) {}
|
|
|
|
FMT_CONSTEXPR int on_arg_id() { return context_.next_arg_id(); }
|
|
FMT_CONSTEXPR int on_arg_id(int id) { return context_.check_arg_id(id), id; }
|
|
FMT_CONSTEXPR int on_arg_id(basic_string_view<Char>) {
|
|
on_error("compile-time checks don't support named arguments");
|
|
return 0;
|
|
}
|
|
|
|
FMT_CONSTEXPR void on_replacement_field(int, const Char*) {}
|
|
|
|
FMT_CONSTEXPR const Char* on_format_specs(int id, const Char* begin,
|
|
const Char*) {
|
|
advance_to(context_, begin);
|
|
// id >= 0 check is a workaround for gcc 10 bug (#2065).
|
|
return id >= 0 && id < num_args ? parse_funcs_[id](context_) : begin;
|
|
}
|
|
|
|
FMT_CONSTEXPR void on_error(const char* message) {
|
|
context_.on_error(message);
|
|
}
|
|
|
|
private:
|
|
using parse_context_type = compile_parse_context<Char, ErrorHandler>;
|
|
enum { num_args = sizeof...(Args) };
|
|
|
|
// Format specifier parsing function.
|
|
using parse_func = const Char* (*)(parse_context_type&);
|
|
|
|
parse_context_type context_;
|
|
parse_func parse_funcs_[num_args > 0 ? num_args : 1];
|
|
};
|
|
|
|
// Converts string literals to basic_string_view.
|
|
template <typename Char, size_t N>
|
|
FMT_CONSTEXPR basic_string_view<Char> compile_string_to_view(
|
|
const Char (&s)[N]) {
|
|
// Remove trailing null character if needed. Won't be present if this is used
|
|
// with raw character array (i.e. not defined as a string).
|
|
return {s,
|
|
N - ((std::char_traits<Char>::to_int_type(s[N - 1]) == 0) ? 1 : 0)};
|
|
}
|
|
|
|
// Converts string_view to basic_string_view.
|
|
template <typename Char>
|
|
FMT_CONSTEXPR basic_string_view<Char> compile_string_to_view(
|
|
const std_string_view<Char>& s) {
|
|
return {s.data(), s.size()};
|
|
}
|
|
|
|
#define FMT_STRING_IMPL(s, base) \
|
|
[] { \
|
|
/* Use the hidden visibility as a workaround for a GCC bug (#1973). */ \
|
|
/* Use a macro-like name to avoid shadowing warnings. */ \
|
|
struct FMT_GCC_VISIBILITY_HIDDEN FMT_COMPILE_STRING : base { \
|
|
using char_type = fmt::remove_cvref_t<decltype(s[0])>; \
|
|
FMT_MAYBE_UNUSED FMT_CONSTEXPR \
|
|
operator fmt::basic_string_view<char_type>() const { \
|
|
return fmt::detail::compile_string_to_view<char_type>(s); \
|
|
} \
|
|
}; \
|
|
return FMT_COMPILE_STRING(); \
|
|
}()
|
|
|
|
/**
|
|
\rst
|
|
Constructs a compile-time format string from a string literal *s*.
|
|
|
|
**Example**::
|
|
|
|
// A compile-time error because 'd' is an invalid specifier for strings.
|
|
std::string s = fmt::format(FMT_STRING("{:d}"), "foo");
|
|
\endrst
|
|
*/
|
|
#define FMT_STRING(s) FMT_STRING_IMPL(s, fmt::compile_string)
|
|
|
|
template <typename... Args, typename S,
|
|
enable_if_t<(is_compile_string<S>::value), int>>
|
|
void check_format_string(S format_str) {
|
|
FMT_CONSTEXPR_DECL auto s = to_string_view(format_str);
|
|
using checker = format_string_checker<typename S::char_type, error_handler,
|
|
remove_cvref_t<Args>...>;
|
|
FMT_CONSTEXPR_DECL bool invalid_format =
|
|
(parse_format_string<true>(s, checker(s, {})), true);
|
|
(void)invalid_format;
|
|
}
|
|
|
|
template <template <typename> class Handler, typename Context>
|
|
FMT_CONSTEXPR void handle_dynamic_spec(int& value,
|
|
arg_ref<typename Context::char_type> ref,
|
|
Context& ctx) {
|
|
switch (ref.kind) {
|
|
case arg_id_kind::none:
|
|
break;
|
|
case arg_id_kind::index:
|
|
value = detail::get_dynamic_spec<Handler>(ctx.arg(ref.val.index),
|
|
ctx.error_handler());
|
|
break;
|
|
case arg_id_kind::name:
|
|
value = detail::get_dynamic_spec<Handler>(ctx.arg(ref.val.name),
|
|
ctx.error_handler());
|
|
break;
|
|
}
|
|
}
|
|
|
|
using format_func = void (*)(detail::buffer<char>&, int, string_view);
|
|
|
|
FMT_API void format_error_code(buffer<char>& out, int error_code,
|
|
string_view message) FMT_NOEXCEPT;
|
|
|
|
FMT_API void report_error(format_func func, int error_code,
|
|
string_view message) FMT_NOEXCEPT;
|
|
} // namespace detail
|
|
|
|
template <typename OutputIt, typename Char>
|
|
using arg_formatter FMT_DEPRECATED_ALIAS =
|
|
detail::arg_formatter<OutputIt, Char>;
|
|
|
|
/**
|
|
An error returned by an operating system or a language runtime,
|
|
for example a file opening error.
|
|
*/
|
|
FMT_CLASS_API
|
|
class FMT_API system_error : public std::runtime_error {
|
|
private:
|
|
void init(int err_code, string_view format_str, format_args args);
|
|
|
|
protected:
|
|
int error_code_;
|
|
|
|
system_error() : std::runtime_error(""), error_code_(0) {}
|
|
|
|
public:
|
|
/**
|
|
\rst
|
|
Constructs a :class:`fmt::system_error` object with a description
|
|
formatted with `fmt::format_system_error`. *message* and additional
|
|
arguments passed into the constructor are formatted similarly to
|
|
`fmt::format`.
|
|
|
|
**Example**::
|
|
|
|
// This throws a system_error with the description
|
|
// cannot open file 'madeup': No such file or directory
|
|
// or similar (system message may vary).
|
|
const char *filename = "madeup";
|
|
std::FILE *file = std::fopen(filename, "r");
|
|
if (!file)
|
|
throw fmt::system_error(errno, "cannot open file '{}'", filename);
|
|
\endrst
|
|
*/
|
|
template <typename... Args>
|
|
system_error(int error_code, string_view message, const Args&... args)
|
|
: std::runtime_error("") {
|
|
init(error_code, message, make_format_args(args...));
|
|
}
|
|
system_error(const system_error&) = default;
|
|
system_error& operator=(const system_error&) = default;
|
|
system_error(system_error&&) = default;
|
|
system_error& operator=(system_error&&) = default;
|
|
~system_error() FMT_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(detail::buffer<char>& out, int error_code,
|
|
string_view message) FMT_NOEXCEPT;
|
|
|
|
// Reports a system error without throwing an exception.
|
|
// Can be used to report errors from destructors.
|
|
FMT_API void report_system_error(int error_code,
|
|
string_view message) FMT_NOEXCEPT;
|
|
|
|
/** Fast integer formatter. */
|
|
class format_int {
|
|
private:
|
|
// Buffer should be large enough to hold all digits (digits10 + 1),
|
|
// a sign and a null character.
|
|
enum { buffer_size = std::numeric_limits<unsigned long long>::digits10 + 3 };
|
|
mutable char buffer_[buffer_size];
|
|
char* str_;
|
|
|
|
template <typename UInt> char* format_unsigned(UInt value) {
|
|
auto n = static_cast<detail::uint32_or_64_or_128_t<UInt>>(value);
|
|
return detail::format_decimal(buffer_, n, buffer_size - 1).begin;
|
|
}
|
|
|
|
template <typename Int> char* format_signed(Int value) {
|
|
auto abs_value = static_cast<detail::uint32_or_64_or_128_t<Int>>(value);
|
|
bool negative = value < 0;
|
|
if (negative) abs_value = 0 - abs_value;
|
|
auto begin = format_unsigned(abs_value);
|
|
if (negative) *--begin = '-';
|
|
return begin;
|
|
}
|
|
|
|
public:
|
|
explicit format_int(int value) : str_(format_signed(value)) {}
|
|
explicit format_int(long value) : str_(format_signed(value)) {}
|
|
explicit format_int(long long value) : str_(format_signed(value)) {}
|
|
explicit format_int(unsigned value) : str_(format_unsigned(value)) {}
|
|
explicit format_int(unsigned long value) : str_(format_unsigned(value)) {}
|
|
explicit format_int(unsigned long long value)
|
|
: str_(format_unsigned(value)) {}
|
|
|
|
/** Returns the number of characters written to the output buffer. */
|
|
size_t size() const {
|
|
return detail::to_unsigned(buffer_ - str_ + buffer_size - 1);
|
|
}
|
|
|
|
/**
|
|
Returns a pointer to the output buffer content. No terminating null
|
|
character is appended.
|
|
*/
|
|
const char* data() const { return str_; }
|
|
|
|
/**
|
|
Returns a pointer to the output buffer content with terminating null
|
|
character appended.
|
|
*/
|
|
const char* c_str() const {
|
|
buffer_[buffer_size - 1] = '\0';
|
|
return str_;
|
|
}
|
|
|
|
/**
|
|
\rst
|
|
Returns the content of the output buffer as an ``std::string``.
|
|
\endrst
|
|
*/
|
|
std::string str() const { return std::string(str_, size()); }
|
|
};
|
|
|
|
// A formatter specialization for the core types corresponding to detail::type
|
|
// constants.
|
|
template <typename T, typename Char>
|
|
struct formatter<T, Char,
|
|
enable_if_t<detail::type_constant<T, Char>::value !=
|
|
detail::type::custom_type>> {
|
|
FMT_CONSTEXPR formatter() = default;
|
|
|
|
// Parses format specifiers stopping either at the end of the range or at the
|
|
// terminating '}'.
|
|
template <typename ParseContext>
|
|
FMT_CONSTEXPR auto parse(ParseContext& ctx) -> decltype(ctx.begin()) {
|
|
auto begin = ctx.begin(), end = ctx.end();
|
|
if (begin == end) return begin;
|
|
using handler_type = detail::dynamic_specs_handler<ParseContext>;
|
|
auto type = detail::type_constant<T, Char>::value;
|
|
detail::specs_checker<handler_type> handler(handler_type(specs_, ctx),
|
|
type);
|
|
auto it = parse_format_specs(begin, end, handler);
|
|
auto eh = ctx.error_handler();
|
|
switch (type) {
|
|
case detail::type::none_type:
|
|
FMT_ASSERT(false, "invalid argument type");
|
|
break;
|
|
case detail::type::bool_type:
|
|
if (!specs_.type || specs_.type == 's') break;
|
|
FMT_FALLTHROUGH;
|
|
case detail::type::int_type:
|
|
case detail::type::uint_type:
|
|
case detail::type::long_long_type:
|
|
case detail::type::ulong_long_type:
|
|
case detail::type::int128_type:
|
|
case detail::type::uint128_type:
|
|
detail::check_int_type_spec(specs_.type, eh);
|
|
break;
|
|
case detail::type::char_type:
|
|
handle_char_specs(
|
|
specs_, detail::char_specs_checker<decltype(eh)>(specs_.type, eh));
|
|
break;
|
|
case detail::type::float_type:
|
|
if (detail::const_check(FMT_USE_FLOAT))
|
|
detail::parse_float_type_spec(specs_, eh);
|
|
else
|
|
FMT_ASSERT(false, "float support disabled");
|
|
break;
|
|
case detail::type::double_type:
|
|
if (detail::const_check(FMT_USE_DOUBLE))
|
|
detail::parse_float_type_spec(specs_, eh);
|
|
else
|
|
FMT_ASSERT(false, "double support disabled");
|
|
break;
|
|
case detail::type::long_double_type:
|
|
if (detail::const_check(FMT_USE_LONG_DOUBLE))
|
|
detail::parse_float_type_spec(specs_, eh);
|
|
else
|
|
FMT_ASSERT(false, "long double support disabled");
|
|
break;
|
|
case detail::type::cstring_type:
|
|
detail::handle_cstring_type_spec(
|
|
specs_.type, detail::cstring_type_checker<decltype(eh)>(eh));
|
|
break;
|
|
case detail::type::string_type:
|
|
detail::check_string_type_spec(specs_.type, eh);
|
|
break;
|
|
case detail::type::pointer_type:
|
|
detail::check_pointer_type_spec(specs_.type, eh);
|
|
break;
|
|
case detail::type::custom_type:
|
|
// Custom format specifiers should be checked in parse functions of
|
|
// formatter specializations.
|
|
break;
|
|
}
|
|
return it;
|
|
}
|
|
|
|
template <typename FormatContext>
|
|
FMT_CONSTEXPR auto format(const T& val, FormatContext& ctx) const
|
|
-> decltype(ctx.out()) {
|
|
auto specs = specs_;
|
|
detail::handle_dynamic_spec<detail::width_checker>(specs.width,
|
|
specs.width_ref, ctx);
|
|
detail::handle_dynamic_spec<detail::precision_checker>(
|
|
specs.precision, specs.precision_ref, ctx);
|
|
using af = detail::arg_formatter<typename FormatContext::iterator,
|
|
typename FormatContext::char_type>;
|
|
return visit_format_arg(af(ctx, specs),
|
|
detail::make_arg<FormatContext>(val));
|
|
}
|
|
|
|
private:
|
|
detail::dynamic_format_specs<Char> specs_;
|
|
};
|
|
|
|
#define FMT_FORMAT_AS(Type, Base) \
|
|
template <typename Char> \
|
|
struct formatter<Type, Char> : formatter<Base, Char> { \
|
|
template <typename FormatContext> \
|
|
auto format(Type const& val, FormatContext& ctx) const \
|
|
-> decltype(ctx.out()) { \
|
|
return formatter<Base, Char>::format(static_cast<Base>(val), ctx); \
|
|
} \
|
|
}
|
|
|
|
FMT_FORMAT_AS(signed char, int);
|
|
FMT_FORMAT_AS(unsigned char, unsigned);
|
|
FMT_FORMAT_AS(short, int);
|
|
FMT_FORMAT_AS(unsigned short, unsigned);
|
|
FMT_FORMAT_AS(long, long long);
|
|
FMT_FORMAT_AS(unsigned long, unsigned long long);
|
|
FMT_FORMAT_AS(Char*, const Char*);
|
|
FMT_FORMAT_AS(std::basic_string<Char>, basic_string_view<Char>);
|
|
FMT_FORMAT_AS(std::nullptr_t, const void*);
|
|
FMT_FORMAT_AS(detail::std_string_view<Char>, basic_string_view<Char>);
|
|
#ifdef __cpp_lib_byte
|
|
FMT_FORMAT_AS(std::byte, unsigned);
|
|
#endif
|
|
|
|
template <typename Char>
|
|
struct formatter<void*, Char> : formatter<const void*, Char> {
|
|
template <typename FormatContext>
|
|
auto format(void* val, FormatContext& ctx) const -> decltype(ctx.out()) {
|
|
return formatter<const void*, Char>::format(val, ctx);
|
|
}
|
|
};
|
|
|
|
template <typename Char, size_t N>
|
|
struct formatter<Char[N], Char> : formatter<basic_string_view<Char>, Char> {
|
|
template <typename FormatContext>
|
|
FMT_CONSTEXPR auto format(const Char* val, FormatContext& ctx) const
|
|
-> decltype(ctx.out()) {
|
|
return formatter<basic_string_view<Char>, Char>::format(val, ctx);
|
|
}
|
|
};
|
|
|
|
// A formatter for types known only at run time such as variant alternatives.
|
|
//
|
|
// Usage:
|
|
// using variant = std::variant<int, std::string>;
|
|
// template <>
|
|
// struct formatter<variant>: dynamic_formatter<> {
|
|
// auto format(const variant& v, format_context& ctx) {
|
|
// return visit([&](const auto& val) {
|
|
// return dynamic_formatter<>::format(val, ctx);
|
|
// }, v);
|
|
// }
|
|
// };
|
|
template <typename Char = char> class dynamic_formatter {
|
|
private:
|
|
struct null_handler : detail::error_handler {
|
|
void on_align(align_t) {}
|
|
void on_plus() {}
|
|
void on_minus() {}
|
|
void on_space() {}
|
|
void on_hash() {}
|
|
};
|
|
|
|
public:
|
|
template <typename ParseContext>
|
|
FMT_CONSTEXPR auto parse(ParseContext& ctx) -> decltype(ctx.begin()) {
|
|
format_str_ = ctx.begin();
|
|
// Checks are deferred to formatting time when the argument type is known.
|
|
detail::dynamic_specs_handler<ParseContext> handler(specs_, ctx);
|
|
return parse_format_specs(ctx.begin(), ctx.end(), handler);
|
|
}
|
|
|
|
template <typename T, typename FormatContext>
|
|
auto format(const T& val, FormatContext& ctx) -> decltype(ctx.out()) {
|
|
handle_specs(ctx);
|
|
detail::specs_checker<null_handler> checker(
|
|
null_handler(), detail::mapped_type_constant<T, FormatContext>::value);
|
|
checker.on_align(specs_.align);
|
|
switch (specs_.sign) {
|
|
case sign::none:
|
|
break;
|
|
case sign::plus:
|
|
checker.on_plus();
|
|
break;
|
|
case sign::minus:
|
|
checker.on_minus();
|
|
break;
|
|
case sign::space:
|
|
checker.on_space();
|
|
break;
|
|
}
|
|
if (specs_.alt) checker.on_hash();
|
|
if (specs_.precision >= 0) checker.end_precision();
|
|
using af = detail::arg_formatter<typename FormatContext::iterator,
|
|
typename FormatContext::char_type>;
|
|
visit_format_arg(af(ctx, specs_), detail::make_arg<FormatContext>(val));
|
|
return ctx.out();
|
|
}
|
|
|
|
private:
|
|
template <typename Context> void handle_specs(Context& ctx) {
|
|
detail::handle_dynamic_spec<detail::width_checker>(specs_.width,
|
|
specs_.width_ref, ctx);
|
|
detail::handle_dynamic_spec<detail::precision_checker>(
|
|
specs_.precision, specs_.precision_ref, ctx);
|
|
}
|
|
|
|
detail::dynamic_format_specs<Char> specs_;
|
|
const Char* format_str_;
|
|
};
|
|
|
|
template <typename Char, typename ErrorHandler>
|
|
FMT_CONSTEXPR void advance_to(
|
|
basic_format_parse_context<Char, ErrorHandler>& ctx, const Char* p) {
|
|
ctx.advance_to(ctx.begin() + (p - &*ctx.begin()));
|
|
}
|
|
|
|
/**
|
|
\rst
|
|
Converts ``p`` to ``const void*`` for pointer formatting.
|
|
|
|
**Example**::
|
|
|
|
auto s = fmt::format("{}", fmt::ptr(p));
|
|
\endrst
|
|
*/
|
|
template <typename T> const void* ptr(T p) {
|
|
static_assert(std::is_pointer<T>::value, "");
|
|
return detail::bit_cast<const void*>(p);
|
|
}
|
|
template <typename T> const void* ptr(const std::unique_ptr<T>& p) {
|
|
return p.get();
|
|
}
|
|
template <typename T> const void* ptr(const std::shared_ptr<T>& p) {
|
|
return p.get();
|
|
}
|
|
|
|
class bytes {
|
|
private:
|
|
string_view data_;
|
|
friend struct formatter<bytes>;
|
|
|
|
public:
|
|
explicit bytes(string_view data) : data_(data) {}
|
|
};
|
|
|
|
template <> struct formatter<bytes> {
|
|
private:
|
|
detail::dynamic_format_specs<char> specs_;
|
|
|
|
public:
|
|
template <typename ParseContext>
|
|
FMT_CONSTEXPR auto parse(ParseContext& ctx) -> decltype(ctx.begin()) {
|
|
using handler_type = detail::dynamic_specs_handler<ParseContext>;
|
|
detail::specs_checker<handler_type> handler(handler_type(specs_, ctx),
|
|
detail::type::string_type);
|
|
auto it = parse_format_specs(ctx.begin(), ctx.end(), handler);
|
|
detail::check_string_type_spec(specs_.type, ctx.error_handler());
|
|
return it;
|
|
}
|
|
|
|
template <typename FormatContext>
|
|
auto format(bytes b, FormatContext& ctx) -> decltype(ctx.out()) {
|
|
detail::handle_dynamic_spec<detail::width_checker>(specs_.width,
|
|
specs_.width_ref, ctx);
|
|
detail::handle_dynamic_spec<detail::precision_checker>(
|
|
specs_.precision, specs_.precision_ref, ctx);
|
|
return detail::write_bytes(ctx.out(), b.data_, specs_);
|
|
}
|
|
};
|
|
|
|
template <typename It, typename Sentinel, typename Char>
|
|
struct arg_join : detail::view {
|
|
It begin;
|
|
Sentinel end;
|
|
basic_string_view<Char> sep;
|
|
|
|
arg_join(It b, Sentinel e, basic_string_view<Char> s)
|
|
: begin(b), end(e), sep(s) {}
|
|
};
|
|
|
|
template <typename It, typename Sentinel, typename Char>
|
|
struct formatter<arg_join<It, Sentinel, Char>, Char> {
|
|
private:
|
|
using value_type = typename std::iterator_traits<It>::value_type;
|
|
using formatter_type =
|
|
conditional_t<has_formatter<value_type, format_context>::value,
|
|
formatter<value_type, Char>,
|
|
detail::fallback_formatter<value_type, Char>>;
|
|
|
|
formatter_type value_formatter_;
|
|
|
|
public:
|
|
template <typename ParseContext>
|
|
FMT_CONSTEXPR auto parse(ParseContext& ctx) -> decltype(ctx.begin()) {
|
|
return value_formatter_.parse(ctx);
|
|
}
|
|
|
|
template <typename FormatContext>
|
|
auto format(const arg_join<It, Sentinel, Char>& value, FormatContext& ctx)
|
|
-> decltype(ctx.out()) {
|
|
auto it = value.begin;
|
|
auto out = ctx.out();
|
|
if (it != value.end) {
|
|
out = value_formatter_.format(*it++, ctx);
|
|
while (it != value.end) {
|
|
out = detail::copy_str<Char>(value.sep.begin(), value.sep.end(), out);
|
|
ctx.advance_to(out);
|
|
out = value_formatter_.format(*it++, ctx);
|
|
}
|
|
}
|
|
return out;
|
|
}
|
|
};
|
|
|
|
/**
|
|
Returns an object that formats the iterator range `[begin, end)` with elements
|
|
separated by `sep`.
|
|
*/
|
|
template <typename It, typename Sentinel>
|
|
arg_join<It, Sentinel, char> join(It begin, Sentinel end, string_view sep) {
|
|
return {begin, end, sep};
|
|
}
|
|
|
|
template <typename It, typename Sentinel>
|
|
arg_join<It, Sentinel, wchar_t> join(It begin, Sentinel end, wstring_view sep) {
|
|
return {begin, end, sep};
|
|
}
|
|
|
|
/**
|
|
\rst
|
|
Returns an object that formats `range` with elements separated by `sep`.
|
|
|
|
**Example**::
|
|
|
|
std::vector<int> v = {1, 2, 3};
|
|
fmt::print("{}", fmt::join(v, ", "));
|
|
// Output: "1, 2, 3"
|
|
|
|
``fmt::join`` applies passed format specifiers to the range elements::
|
|
|
|
fmt::print("{:02}", fmt::join(v, ", "));
|
|
// Output: "01, 02, 03"
|
|
\endrst
|
|
*/
|
|
template <typename Range>
|
|
arg_join<detail::iterator_t<Range>, detail::sentinel_t<Range>, char> join(
|
|
Range&& range, string_view sep) {
|
|
return join(std::begin(range), std::end(range), sep);
|
|
}
|
|
|
|
template <typename Range>
|
|
arg_join<detail::iterator_t<Range>, detail::sentinel_t<Range>, wchar_t> join(
|
|
Range&& range, wstring_view sep) {
|
|
return join(std::begin(range), std::end(range), sep);
|
|
}
|
|
|
|
/**
|
|
\rst
|
|
Converts *value* to ``std::string`` using the default format for type *T*.
|
|
|
|
**Example**::
|
|
|
|
#include <fmt/format.h>
|
|
|
|
std::string answer = fmt::to_string(42);
|
|
\endrst
|
|
*/
|
|
template <typename T, FMT_ENABLE_IF(!std::is_integral<T>::value)>
|
|
inline std::string to_string(const T& value) {
|
|
std::string result;
|
|
detail::write<char>(std::back_inserter(result), value);
|
|
return result;
|
|
}
|
|
|
|
template <typename T, FMT_ENABLE_IF(std::is_integral<T>::value)>
|
|
inline std::string to_string(T value) {
|
|
// The buffer should be large enough to store the number including the sign or
|
|
// "false" for bool.
|
|
constexpr int max_size = detail::digits10<T>() + 2;
|
|
char buffer[max_size > 5 ? static_cast<unsigned>(max_size) : 5];
|
|
char* begin = buffer;
|
|
return std::string(begin, detail::write<char>(begin, value));
|
|
}
|
|
|
|
/**
|
|
Converts *value* to ``std::wstring`` using the default format for type *T*.
|
|
*/
|
|
template <typename T> inline std::wstring to_wstring(const T& value) {
|
|
return format(FMT_STRING(L"{}"), value);
|
|
}
|
|
|
|
template <typename Char, size_t SIZE>
|
|
std::basic_string<Char> to_string(const basic_memory_buffer<Char, SIZE>& buf) {
|
|
auto size = buf.size();
|
|
detail::assume(size < std::basic_string<Char>().max_size());
|
|
return std::basic_string<Char>(buf.data(), size);
|
|
}
|
|
|
|
template <typename Char>
|
|
void detail::vformat_to(
|
|
detail::buffer<Char>& buf, basic_string_view<Char> format_str,
|
|
basic_format_args<buffer_context<type_identity_t<Char>>> args,
|
|
detail::locale_ref loc) {
|
|
using iterator = typename buffer_context<Char>::iterator;
|
|
auto out = buffer_appender<Char>(buf);
|
|
if (format_str.size() == 2 && equal2(format_str.data(), "{}")) {
|
|
auto arg = args.get(0);
|
|
if (!arg) error_handler().on_error("argument not found");
|
|
visit_format_arg(default_arg_formatter<iterator, Char>{out, args, loc},
|
|
arg);
|
|
return;
|
|
}
|
|
format_handler<iterator, Char, buffer_context<Char>> h(out, format_str, args,
|
|
loc);
|
|
parse_format_string<false>(format_str, h);
|
|
}
|
|
|
|
#ifndef FMT_HEADER_ONLY
|
|
extern template void detail::vformat_to(detail::buffer<char>&, string_view,
|
|
basic_format_args<format_context>,
|
|
detail::locale_ref);
|
|
namespace detail {
|
|
|
|
extern template FMT_API std::string grouping_impl<char>(locale_ref loc);
|
|
extern template FMT_API std::string grouping_impl<wchar_t>(locale_ref loc);
|
|
extern template FMT_API char thousands_sep_impl<char>(locale_ref loc);
|
|
extern template FMT_API wchar_t thousands_sep_impl<wchar_t>(locale_ref loc);
|
|
extern template FMT_API char decimal_point_impl(locale_ref loc);
|
|
extern template FMT_API wchar_t decimal_point_impl(locale_ref loc);
|
|
extern template int format_float<double>(double value, int precision,
|
|
float_specs specs, buffer<char>& buf);
|
|
extern template int format_float<long double>(long double value, int precision,
|
|
float_specs specs,
|
|
buffer<char>& buf);
|
|
int snprintf_float(float value, int precision, float_specs specs,
|
|
buffer<char>& buf) = delete;
|
|
extern template int snprintf_float<double>(double value, int precision,
|
|
float_specs specs,
|
|
buffer<char>& buf);
|
|
extern template int snprintf_float<long double>(long double value,
|
|
int precision,
|
|
float_specs specs,
|
|
buffer<char>& buf);
|
|
} // namespace detail
|
|
#endif
|
|
|
|
template <typename S, typename Char = char_t<S>,
|
|
FMT_ENABLE_IF(detail::is_string<S>::value)>
|
|
inline void vformat_to(
|
|
detail::buffer<Char>& buf, const S& format_str,
|
|
basic_format_args<FMT_BUFFER_CONTEXT(type_identity_t<Char>)> args) {
|
|
return detail::vformat_to(buf, to_string_view(format_str), args);
|
|
}
|
|
|
|
template <typename S, typename... Args, size_t SIZE = inline_buffer_size,
|
|
typename Char = enable_if_t<detail::is_string<S>::value, char_t<S>>>
|
|
inline typename buffer_context<Char>::iterator format_to(
|
|
basic_memory_buffer<Char, SIZE>& buf, const S& format_str, Args&&... args) {
|
|
const auto& vargs = fmt::make_args_checked<Args...>(format_str, args...);
|
|
detail::vformat_to(buf, to_string_view(format_str), vargs);
|
|
return detail::buffer_appender<Char>(buf);
|
|
}
|
|
|
|
template <typename OutputIt, typename Char = char>
|
|
using format_context_t = basic_format_context<OutputIt, Char>;
|
|
|
|
template <typename OutputIt, typename Char = char>
|
|
using format_args_t = basic_format_args<format_context_t<OutputIt, Char>>;
|
|
|
|
template <typename OutputIt, typename Char = typename OutputIt::value_type>
|
|
using format_to_n_context FMT_DEPRECATED_ALIAS = buffer_context<Char>;
|
|
|
|
template <typename OutputIt, typename Char = typename OutputIt::value_type>
|
|
using format_to_n_args FMT_DEPRECATED_ALIAS =
|
|
basic_format_args<buffer_context<Char>>;
|
|
|
|
template <typename OutputIt, typename Char, typename... Args>
|
|
FMT_DEPRECATED format_arg_store<buffer_context<Char>, Args...>
|
|
make_format_to_n_args(const Args&... args) {
|
|
return format_arg_store<buffer_context<Char>, Args...>(args...);
|
|
}
|
|
|
|
#if FMT_COMPILE_TIME_CHECKS
|
|
template <typename... Args> struct format_string {
|
|
string_view str;
|
|
|
|
template <size_t N> consteval format_string(const char (&s)[N]) : str(s) {
|
|
if constexpr (detail::count_named_args<Args...>() == 0) {
|
|
using checker = detail::format_string_checker<char, detail::error_handler,
|
|
remove_cvref_t<Args>...>;
|
|
detail::parse_format_string<true>(string_view(s, N), checker(s, {}));
|
|
}
|
|
}
|
|
|
|
template <typename T,
|
|
FMT_ENABLE_IF(std::is_constructible_v<string_view, const T&>)>
|
|
format_string(const T& s) : str(s) {}
|
|
};
|
|
|
|
template <typename... Args>
|
|
FMT_INLINE std::string format(
|
|
format_string<std::type_identity_t<Args>...> format_str, Args&&... args) {
|
|
return detail::vformat(format_str.str, make_format_args(args...));
|
|
}
|
|
#endif
|
|
|
|
template <typename Char, enable_if_t<(!std::is_same<Char, char>::value), int>>
|
|
std::basic_string<Char> detail::vformat(
|
|
basic_string_view<Char> format_str,
|
|
basic_format_args<buffer_context<type_identity_t<Char>>> args) {
|
|
basic_memory_buffer<Char> buffer;
|
|
detail::vformat_to(buffer, format_str, args);
|
|
return to_string(buffer);
|
|
}
|
|
|
|
template <typename Char, FMT_ENABLE_IF(std::is_same<Char, wchar_t>::value)>
|
|
void vprint(std::FILE* f, basic_string_view<Char> format_str,
|
|
wformat_args args) {
|
|
wmemory_buffer buffer;
|
|
detail::vformat_to(buffer, format_str, args);
|
|
buffer.push_back(L'\0');
|
|
if (std::fputws(buffer.data(), f) == -1)
|
|
FMT_THROW(system_error(errno, "cannot write to file"));
|
|
}
|
|
|
|
template <typename Char, FMT_ENABLE_IF(std::is_same<Char, wchar_t>::value)>
|
|
void vprint(basic_string_view<Char> format_str, wformat_args args) {
|
|
vprint(stdout, format_str, args);
|
|
}
|
|
|
|
#if FMT_USE_USER_DEFINED_LITERALS
|
|
namespace detail {
|
|
template <typename Char> struct udl_formatter {
|
|
basic_string_view<Char> str;
|
|
|
|
template <typename... Args>
|
|
std::basic_string<Char> operator()(Args&&... args) const {
|
|
return format(str, std::forward<Args>(args)...);
|
|
}
|
|
};
|
|
|
|
template <typename Char> struct udl_arg {
|
|
const Char* str;
|
|
|
|
template <typename T> named_arg<Char, T> operator=(T&& value) const {
|
|
return {str, std::forward<T>(value)};
|
|
}
|
|
};
|
|
} // namespace detail
|
|
|
|
inline namespace literals {
|
|
/**
|
|
\rst
|
|
User-defined literal equivalent of :func:`fmt::format`.
|
|
|
|
**Example**::
|
|
|
|
using namespace fmt::literals;
|
|
std::string message = "The answer is {}"_format(42);
|
|
\endrst
|
|
*/
|
|
constexpr detail::udl_formatter<char> operator"" _format(const char* s,
|
|
size_t n) {
|
|
return {{s, n}};
|
|
}
|
|
constexpr detail::udl_formatter<wchar_t> operator"" _format(const wchar_t* s,
|
|
size_t n) {
|
|
return {{s, n}};
|
|
}
|
|
|
|
/**
|
|
\rst
|
|
User-defined literal equivalent of :func:`fmt::arg`.
|
|
|
|
**Example**::
|
|
|
|
using namespace fmt::literals;
|
|
fmt::print("Elapsed time: {s:.2f} seconds", "s"_a=1.23);
|
|
\endrst
|
|
*/
|
|
constexpr detail::udl_arg<char> operator"" _a(const char* s, size_t) {
|
|
return {s};
|
|
}
|
|
constexpr detail::udl_arg<wchar_t> operator"" _a(const wchar_t* s, size_t) {
|
|
return {s};
|
|
}
|
|
} // namespace literals
|
|
#endif // FMT_USE_USER_DEFINED_LITERALS
|
|
FMT_END_NAMESPACE
|
|
|
|
#ifdef FMT_HEADER_ONLY
|
|
# define FMT_FUNC inline
|
|
# include "format-inl.h"
|
|
#else
|
|
# define FMT_FUNC
|
|
#endif
|
|
|
|
#endif // FMT_FORMAT_H_
|