3748 lines
112 KiB
C++
3748 lines
112 KiB
C++
/*
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Formatting library for C++
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Copyright (c) 2012 - present, Victor Zverovich
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All rights reserved.
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions are met:
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1. Redistributions of source code must retain the above copyright notice, this
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list of conditions and the following disclaimer.
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2. Redistributions in binary form must reproduce the above copyright notice,
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this list of conditions and the following disclaimer in the documentation
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and/or other materials provided with the distribution.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
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ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
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ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef FMT_FORMAT_H_
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#define FMT_FORMAT_H_
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#include <algorithm>
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#include <cassert>
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#include <cmath>
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#include <cstring>
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#include <limits>
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#include <memory>
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#include <stdexcept>
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#include <stdint.h>
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#ifdef __clang__
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# define FMT_CLANG_VERSION (__clang_major__ * 100 + __clang_minor__)
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#else
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# define FMT_CLANG_VERSION 0
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#endif
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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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#include "core.h"
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#if FMT_GCC_VERSION >= 406 || FMT_CLANG_VERSION
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# pragma GCC diagnostic push
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// Disable the warning about declaration shadowing because it affects too
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// many valid cases.
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# pragma GCC diagnostic ignored "-Wshadow"
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// Disable the warning about implicit conversions that may change the sign of
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// an integer; silencing it otherwise would require many explicit casts.
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# pragma GCC diagnostic ignored "-Wsign-conversion"
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#endif
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# if FMT_CLANG_VERSION
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# pragma GCC diagnostic ignored "-Wgnu-string-literal-operator-template"
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# endif
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#ifdef _SECURE_SCL
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# define FMT_SECURE_SCL _SECURE_SCL
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#else
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# define FMT_SECURE_SCL 0
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#endif
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#if FMT_SECURE_SCL
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# include <iterator>
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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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#ifdef __GNUC_LIBSTD__
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# define FMT_GNUC_LIBSTD_VERSION (__GNUC_LIBSTD__ * 100 + __GNUC_LIBSTD_MINOR__)
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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
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FMT_BEGIN_NAMESPACE
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namespace internal {
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template <typename Exception>
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inline void do_throw(const Exception &x) {
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// Silence unreachable code warnings in MSVC because these are nearly
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// impossible to fix in a generic code.
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volatile bool b = true;
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if (b)
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throw x;
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}
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}
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FMT_END_NAMESPACE
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# define FMT_THROW(x) fmt::internal::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) do { static_cast<void>(sizeof(x)); assert(false); } while(false);
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# endif
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#endif
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#ifndef FMT_USE_USER_DEFINED_LITERALS
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// For Intel's compiler and NVIDIA's compiler both it and the system gcc/msc
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// must support UDLs.
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# if (FMT_HAS_FEATURE(cxx_user_literals) || \
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FMT_GCC_VERSION >= 407 || FMT_MSC_VER >= 1900) && \
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(!(FMT_ICC_VERSION || FMT_CUDA_VERSION) || \
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FMT_ICC_VERSION >= 1500 || FMT_CUDA_VERSION >= 700)
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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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// EDG C++ Front End based compilers (icc, nvcc) do not currently support UDL
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// templates.
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#if FMT_USE_USER_DEFINED_LITERALS && \
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FMT_ICC_VERSION == 0 && \
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FMT_CUDA_VERSION == 0 && \
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((FMT_GCC_VERSION >= 600 && __cplusplus >= 201402L) || \
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(defined(FMT_CLANG_VERSION) && FMT_CLANG_VERSION >= 304))
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# define FMT_UDL_TEMPLATE 1
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#else
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# define FMT_UDL_TEMPLATE 0
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#endif
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#ifndef FMT_USE_EXTERN_TEMPLATES
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# ifndef FMT_HEADER_ONLY
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# define FMT_USE_EXTERN_TEMPLATES \
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((FMT_CLANG_VERSION >= 209 && __cplusplus >= 201103L) || \
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(FMT_GCC_VERSION >= 303 && FMT_HAS_GXX_CXX11))
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# else
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# define FMT_USE_EXTERN_TEMPLATES 0
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# endif
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#endif
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#if FMT_HAS_GXX_CXX11 || FMT_HAS_FEATURE(cxx_trailing_return) || \
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FMT_MSC_VER >= 1600
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# define FMT_USE_TRAILING_RETURN 1
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#else
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# define FMT_USE_TRAILING_RETURN 0
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#endif
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#ifndef FMT_USE_GRISU
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# define FMT_USE_GRISU 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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#ifndef _MSC_VER
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# if FMT_GCC_VERSION >= 400 || FMT_HAS_BUILTIN(__builtin_clz)
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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 >= 400 || FMT_HAS_BUILTIN(__builtin_clzll)
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# define FMT_BUILTIN_CLZLL(n) __builtin_clzll(n)
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# endif
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#endif
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// A workaround for gcc 4.4 that doesn't support union members with ctors.
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#if (FMT_GCC_VERSION && FMT_GCC_VERSION <= 404) || \
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(FMT_MSC_VER && FMT_MSC_VER <= 1800)
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# define FMT_UNION struct
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#else
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# define FMT_UNION union
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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(_MANAGED)
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# include <intrin.h> // _BitScanReverse, _BitScanReverse64
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FMT_BEGIN_NAMESPACE
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namespace internal {
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// Avoid Clang with Microsoft CodeGen's -Wunknown-pragmas warning.
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# ifndef __clang__
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# pragma intrinsic(_BitScanReverse)
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# endif
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inline uint32_t clz(uint32_t x) {
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unsigned long r = 0;
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_BitScanReverse(&r, x);
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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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# pragma warning(suppress: 6102)
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return 31 - r;
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}
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# define FMT_BUILTIN_CLZ(n) fmt::internal::clz(n)
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# if defined(_WIN64) && !defined(__clang__)
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# pragma intrinsic(_BitScanReverse64)
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# endif
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inline uint32_t 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)))
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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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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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# pragma warning(suppress: 6102)
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return 63 - r;
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}
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# define FMT_BUILTIN_CLZLL(n) fmt::internal::clzll(n)
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}
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FMT_END_NAMESPACE
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#endif
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FMT_BEGIN_NAMESPACE
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namespace internal {
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// An equivalent of `*reinterpret_cast<Dest*>(&source)` that doesn't produce
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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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// An implementation of begin and end for pre-C++11 compilers such as gcc 4.
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template <typename C>
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FMT_CONSTEXPR auto begin(const C &c) -> decltype(c.begin()) {
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return c.begin();
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}
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template <typename T, std::size_t N>
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FMT_CONSTEXPR T *begin(T (&array)[N]) FMT_NOEXCEPT { return array; }
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template <typename C>
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FMT_CONSTEXPR auto end(const C &c) -> decltype(c.end()) { return c.end(); }
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template <typename T, std::size_t N>
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FMT_CONSTEXPR T *end(T (&array)[N]) FMT_NOEXCEPT { return array + N; }
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// For std::result_of in gcc 4.4.
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template <typename Result>
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struct function {
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template <typename T>
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struct result { typedef Result type; };
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};
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struct dummy_int {
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int data[2];
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operator int() const { return 0; }
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};
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typedef std::numeric_limits<internal::dummy_int> fputil;
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// Dummy implementations of system functions such as signbit and ecvt called
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// if the latter are not available.
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inline dummy_int signbit(...) { return dummy_int(); }
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inline dummy_int _ecvt_s(...) { return dummy_int(); }
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inline dummy_int isinf(...) { return dummy_int(); }
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inline dummy_int _finite(...) { return dummy_int(); }
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inline dummy_int isnan(...) { return dummy_int(); }
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inline dummy_int _isnan(...) { return dummy_int(); }
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inline bool use_grisu() {
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return FMT_USE_GRISU && std::numeric_limits<double>::is_iec559;
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}
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// Formats value using Grisu2 algorithm:
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// https://www.cs.tufts.edu/~nr/cs257/archive/florian-loitsch/printf.pdf
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template <typename Double>
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FMT_API typename std::enable_if<sizeof(Double) == sizeof(uint64_t)>::type
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grisu2_format(Double value, char *buffer, size_t &size, char type,
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int precision, bool write_decimal_point);
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template <typename Double>
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inline typename std::enable_if<sizeof(Double) != sizeof(uint64_t)>::type
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grisu2_format(Double, char *, size_t &, char, int, bool) {}
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template <typename Allocator>
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typename Allocator::value_type *allocate(Allocator& alloc, std::size_t n) {
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#if __cplusplus >= 201103L || FMT_MSC_VER >= 1700
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return std::allocator_traits<Allocator>::allocate(alloc, n);
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#else
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return alloc.allocate(n);
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#endif
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}
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// A helper function to suppress bogus "conditional expression is constant"
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// warnings.
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template <typename T>
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inline T const_check(T value) { return value; }
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} // namespace internal
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FMT_END_NAMESPACE
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namespace std {
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// Standard permits specialization of std::numeric_limits. This specialization
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// is used to resolve ambiguity between isinf and std::isinf in glibc:
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// https://gcc.gnu.org/bugzilla/show_bug.cgi?id=48891
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// and the same for isnan and signbit.
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template <>
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class numeric_limits<fmt::internal::dummy_int> :
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public std::numeric_limits<int> {
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public:
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// Portable version of isinf.
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template <typename T>
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static bool isinfinity(T x) {
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using namespace fmt::internal;
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// The resolution "priority" is:
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// isinf macro > std::isinf > ::isinf > fmt::internal::isinf
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if (const_check(sizeof(isinf(x)) != sizeof(dummy_int)))
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return isinf(x) != 0;
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return !_finite(static_cast<double>(x));
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}
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// Portable version of isnan.
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template <typename T>
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static bool isnotanumber(T x) {
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using namespace fmt::internal;
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if (const_check(sizeof(isnan(x)) != sizeof(fmt::internal::dummy_int)))
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return isnan(x) != 0;
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return _isnan(static_cast<double>(x)) != 0;
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}
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// Portable version of signbit.
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static bool isnegative(double x) {
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using namespace fmt::internal;
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if (const_check(sizeof(signbit(x)) != sizeof(fmt::internal::dummy_int)))
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return signbit(x) != 0;
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if (x < 0) return true;
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if (!isnotanumber(x)) return false;
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int dec = 0, sign = 0;
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char buffer[2]; // The buffer size must be >= 2 or _ecvt_s will fail.
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_ecvt_s(buffer, sizeof(buffer), x, 0, &dec, &sign);
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return sign != 0;
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}
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};
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} // namespace std
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FMT_BEGIN_NAMESPACE
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template <typename Range>
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class basic_writer;
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template <typename OutputIt, typename T = typename OutputIt::value_type>
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class output_range {
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private:
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OutputIt it_;
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// Unused yet.
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typedef void sentinel;
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sentinel end() const;
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public:
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typedef OutputIt iterator;
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typedef T value_type;
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explicit output_range(OutputIt it): it_(it) {}
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OutputIt begin() const { return it_; }
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};
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// A range where begin() returns back_insert_iterator.
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template <typename Container>
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class back_insert_range:
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public output_range<std::back_insert_iterator<Container>> {
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typedef output_range<std::back_insert_iterator<Container>> base;
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public:
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typedef typename Container::value_type value_type;
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back_insert_range(Container &c): base(std::back_inserter(c)) {}
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back_insert_range(typename base::iterator it): base(it) {}
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};
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typedef basic_writer<back_insert_range<internal::buffer>> writer;
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typedef basic_writer<back_insert_range<internal::wbuffer>> wwriter;
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/** A formatting error such as invalid format string. */
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class format_error : public std::runtime_error {
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|
public:
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explicit format_error(const char *message)
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: std::runtime_error(message) {}
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explicit format_error(const std::string &message)
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: std::runtime_error(message) {}
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};
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namespace internal {
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#if FMT_SECURE_SCL
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template <typename T>
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struct checked { typedef stdext::checked_array_iterator<T*> type; };
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// Make a checked iterator to avoid warnings on MSVC.
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template <typename T>
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inline stdext::checked_array_iterator<T*> make_checked(T *p, std::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>
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struct checked { typedef T *type; };
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template <typename T>
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inline T *make_checked(T *p, std::size_t) { return p; }
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#endif
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template <typename T>
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template <typename U>
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void basic_buffer<T>::append(const U *begin, const U *end) {
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std::size_t new_size = size_ + internal::to_unsigned(end - begin);
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reserve(new_size);
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std::uninitialized_copy(begin, end,
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internal::make_checked(ptr_, capacity_) + size_);
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size_ = new_size;
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}
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} // namespace internal
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// A UTF-8 code unit type.
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enum char8_t: unsigned char {};
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|
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// A UTF-8 string view.
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|
class u8string_view : public basic_string_view<char8_t> {
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|
public:
|
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typedef char8_t char_type;
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|
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u8string_view(const char *s):
|
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basic_string_view<char8_t>(reinterpret_cast<const char8_t*>(s)) {}
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u8string_view(const char *s, size_t count) FMT_NOEXCEPT:
|
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basic_string_view<char8_t>(reinterpret_cast<const char8_t*>(s), count) {}
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};
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#if FMT_USE_USER_DEFINED_LITERALS
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inline namespace literals {
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inline u8string_view operator"" _u(const char *s, std::size_t n) {
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return {s, n};
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}
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}
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#endif
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|
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// A wrapper around std::locale used to reduce compile times since <locale>
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|
// is very heavy.
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class locale;
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|
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class locale_provider {
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|
public:
|
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virtual ~locale_provider() {}
|
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virtual fmt::locale locale();
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|
};
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// The number of characters to store in the basic_memory_buffer object itself
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// to avoid dynamic memory allocation.
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enum { inline_buffer_size = 500 };
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/**
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\rst
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A dynamically growing memory buffer for trivially copyable/constructible types
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with the first ``SIZE`` elements stored in the object itself.
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You can use one of the following typedefs for common character types:
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|
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+----------------+------------------------------+
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| Type | Definition |
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+================+==============================+
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| memory_buffer | basic_memory_buffer<char> |
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+----------------+------------------------------+
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| wmemory_buffer | basic_memory_buffer<wchar_t> |
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+----------------+------------------------------+
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**Example**::
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fmt::memory_buffer out;
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format_to(out, "The answer is {}.", 42);
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This will append the following output to the ``out`` object:
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.. code-block:: none
|
|
|
|
The answer is 42.
|
|
|
|
The output can be converted to an ``std::string`` with ``to_string(out)``.
|
|
\endrst
|
|
*/
|
|
template <typename T, std::size_t SIZE = inline_buffer_size,
|
|
typename Allocator = std::allocator<T> >
|
|
class basic_memory_buffer: private Allocator, public internal::basic_buffer<T> {
|
|
private:
|
|
T store_[SIZE];
|
|
|
|
// Deallocate memory allocated by the buffer.
|
|
void deallocate() {
|
|
T* data = this->data();
|
|
if (data != store_) Allocator::deallocate(data, this->capacity());
|
|
}
|
|
|
|
protected:
|
|
void grow(std::size_t size) FMT_OVERRIDE;
|
|
|
|
public:
|
|
explicit basic_memory_buffer(const Allocator &alloc = Allocator())
|
|
: Allocator(alloc) {
|
|
this->set(store_, SIZE);
|
|
}
|
|
~basic_memory_buffer() { deallocate(); }
|
|
|
|
private:
|
|
// Move data from other to this buffer.
|
|
void move(basic_memory_buffer &other) {
|
|
Allocator &this_alloc = *this, &other_alloc = other;
|
|
this_alloc = std::move(other_alloc);
|
|
T* data = other.data();
|
|
std::size_t size = other.size(), capacity = other.capacity();
|
|
if (data == other.store_) {
|
|
this->set(store_, capacity);
|
|
std::uninitialized_copy(other.store_, other.store_ + size,
|
|
internal::make_checked(store_, capacity));
|
|
} else {
|
|
this->set(data, capacity);
|
|
// Set pointer to the inline array so that delete is not called
|
|
// when deallocating.
|
|
other.set(other.store_, 0);
|
|
}
|
|
this->resize(size);
|
|
}
|
|
|
|
public:
|
|
/**
|
|
\rst
|
|
Constructs a :class:`fmt::basic_memory_buffer` object moving the content
|
|
of the other object to it.
|
|
\endrst
|
|
*/
|
|
basic_memory_buffer(basic_memory_buffer &&other) {
|
|
move(other);
|
|
}
|
|
|
|
/**
|
|
\rst
|
|
Moves the content of the other ``basic_memory_buffer`` object to this one.
|
|
\endrst
|
|
*/
|
|
basic_memory_buffer &operator=(basic_memory_buffer &&other) {
|
|
assert(this != &other);
|
|
deallocate();
|
|
move(other);
|
|
return *this;
|
|
}
|
|
|
|
// Returns a copy of the allocator associated with this buffer.
|
|
Allocator get_allocator() const { return *this; }
|
|
};
|
|
|
|
template <typename T, std::size_t SIZE, typename Allocator>
|
|
void basic_memory_buffer<T, SIZE, Allocator>::grow(std::size_t size) {
|
|
std::size_t old_capacity = this->capacity();
|
|
std::size_t new_capacity = old_capacity + old_capacity / 2;
|
|
if (size > new_capacity)
|
|
new_capacity = size;
|
|
T *old_data = this->data();
|
|
T *new_data = internal::allocate<Allocator>(*this, new_capacity);
|
|
// The following code doesn't throw, so the raw pointer above doesn't leak.
|
|
std::uninitialized_copy(old_data, old_data + this->size(),
|
|
internal::make_checked(new_data, new_capacity));
|
|
this->set(new_data, new_capacity);
|
|
// deallocate must not throw according to the standard, but even if it does,
|
|
// the buffer already uses the new storage and will deallocate it in
|
|
// destructor.
|
|
if (old_data != store_)
|
|
Allocator::deallocate(old_data, old_capacity);
|
|
}
|
|
|
|
typedef basic_memory_buffer<char> memory_buffer;
|
|
typedef basic_memory_buffer<wchar_t> wmemory_buffer;
|
|
|
|
/**
|
|
\rst
|
|
A fixed-size memory buffer. For a dynamically growing buffer use
|
|
:class:`fmt::basic_memory_buffer`.
|
|
|
|
Trying to increase the buffer size past the initial capacity will throw
|
|
``std::runtime_error``.
|
|
\endrst
|
|
*/
|
|
template <typename Char>
|
|
class basic_fixed_buffer : public internal::basic_buffer<Char> {
|
|
public:
|
|
/**
|
|
\rst
|
|
Constructs a :class:`fmt::basic_fixed_buffer` object for *array* of the
|
|
given size.
|
|
\endrst
|
|
*/
|
|
basic_fixed_buffer(Char *array, std::size_t size) {
|
|
this->set(array, size);
|
|
}
|
|
|
|
/**
|
|
\rst
|
|
Constructs a :class:`fmt::basic_fixed_buffer` object for *array* of the
|
|
size known at compile time.
|
|
\endrst
|
|
*/
|
|
template <std::size_t SIZE>
|
|
explicit basic_fixed_buffer(Char (&array)[SIZE]) {
|
|
this->set(array, SIZE);
|
|
}
|
|
|
|
protected:
|
|
FMT_API void grow(std::size_t size) FMT_OVERRIDE;
|
|
};
|
|
|
|
namespace internal {
|
|
|
|
template <typename Char>
|
|
struct char_traits;
|
|
|
|
template <>
|
|
struct char_traits<char> {
|
|
// Formats a floating-point number.
|
|
template <typename T>
|
|
FMT_API static int format_float(char *buffer, std::size_t size,
|
|
const char *format, int precision, T value);
|
|
};
|
|
|
|
template <>
|
|
struct char_traits<wchar_t> {
|
|
template <typename T>
|
|
FMT_API static int format_float(wchar_t *buffer, std::size_t size,
|
|
const wchar_t *format, int precision, T value);
|
|
};
|
|
|
|
#if FMT_USE_EXTERN_TEMPLATES
|
|
extern template int char_traits<char>::format_float<double>(
|
|
char *buffer, std::size_t size, const char* format, int precision,
|
|
double value);
|
|
extern template int char_traits<char>::format_float<long double>(
|
|
char *buffer, std::size_t size, const char* format, int precision,
|
|
long double value);
|
|
|
|
extern template int char_traits<wchar_t>::format_float<double>(
|
|
wchar_t *buffer, std::size_t size, const wchar_t* format, int precision,
|
|
double value);
|
|
extern template int char_traits<wchar_t>::format_float<long double>(
|
|
wchar_t *buffer, std::size_t size, const wchar_t* format, int precision,
|
|
long double value);
|
|
#endif
|
|
|
|
template <typename Container>
|
|
inline typename std::enable_if<
|
|
is_contiguous<Container>::value,
|
|
typename checked<typename Container::value_type>::type>::type
|
|
reserve(std::back_insert_iterator<Container> &it, std::size_t n) {
|
|
Container &c = internal::get_container(it);
|
|
std::size_t size = c.size();
|
|
c.resize(size + n);
|
|
return make_checked(&c[size], n);
|
|
}
|
|
|
|
template <typename Iterator>
|
|
inline Iterator &reserve(Iterator &it, std::size_t) { return it; }
|
|
|
|
template <typename Char>
|
|
class null_terminating_iterator;
|
|
|
|
template <typename Char>
|
|
FMT_CONSTEXPR_DECL const Char *pointer_from(null_terminating_iterator<Char> it);
|
|
|
|
// An iterator that produces a null terminator on *end. This simplifies parsing
|
|
// and allows comparing the performance of processing a null-terminated string
|
|
// vs string_view.
|
|
template <typename Char>
|
|
class null_terminating_iterator {
|
|
public:
|
|
typedef std::ptrdiff_t difference_type;
|
|
typedef Char value_type;
|
|
typedef const Char* pointer;
|
|
typedef const Char& reference;
|
|
typedef std::random_access_iterator_tag iterator_category;
|
|
|
|
null_terminating_iterator() : ptr_(0), end_(0) {}
|
|
|
|
FMT_CONSTEXPR null_terminating_iterator(const Char *ptr, const Char *end)
|
|
: ptr_(ptr), end_(end) {}
|
|
|
|
template <typename Range>
|
|
FMT_CONSTEXPR explicit null_terminating_iterator(const Range &r)
|
|
: ptr_(r.begin()), end_(r.end()) {}
|
|
|
|
FMT_CONSTEXPR null_terminating_iterator &operator=(const Char *ptr) {
|
|
assert(ptr <= end_);
|
|
ptr_ = ptr;
|
|
return *this;
|
|
}
|
|
|
|
FMT_CONSTEXPR Char operator*() const {
|
|
return ptr_ != end_ ? *ptr_ : Char();
|
|
}
|
|
|
|
FMT_CONSTEXPR null_terminating_iterator operator++() {
|
|
++ptr_;
|
|
return *this;
|
|
}
|
|
|
|
FMT_CONSTEXPR null_terminating_iterator operator++(int) {
|
|
null_terminating_iterator result(*this);
|
|
++ptr_;
|
|
return result;
|
|
}
|
|
|
|
FMT_CONSTEXPR null_terminating_iterator operator--() {
|
|
--ptr_;
|
|
return *this;
|
|
}
|
|
|
|
FMT_CONSTEXPR null_terminating_iterator operator+(difference_type n) {
|
|
return null_terminating_iterator(ptr_ + n, end_);
|
|
}
|
|
|
|
FMT_CONSTEXPR null_terminating_iterator operator-(difference_type n) {
|
|
return null_terminating_iterator(ptr_ - n, end_);
|
|
}
|
|
|
|
FMT_CONSTEXPR null_terminating_iterator operator+=(difference_type n) {
|
|
ptr_ += n;
|
|
return *this;
|
|
}
|
|
|
|
FMT_CONSTEXPR difference_type operator-(
|
|
null_terminating_iterator other) const {
|
|
return ptr_ - other.ptr_;
|
|
}
|
|
|
|
FMT_CONSTEXPR bool operator!=(null_terminating_iterator other) const {
|
|
return ptr_ != other.ptr_;
|
|
}
|
|
|
|
bool operator>=(null_terminating_iterator other) const {
|
|
return ptr_ >= other.ptr_;
|
|
}
|
|
|
|
// This should be a friend specialization pointer_from<Char> but the latter
|
|
// doesn't compile by gcc 5.1 due to a compiler bug.
|
|
template <typename CharT>
|
|
friend FMT_CONSTEXPR_DECL const CharT *pointer_from(
|
|
null_terminating_iterator<CharT> it);
|
|
|
|
private:
|
|
const Char *ptr_;
|
|
const Char *end_;
|
|
};
|
|
|
|
template <typename T>
|
|
FMT_CONSTEXPR const T *pointer_from(const T *p) { return p; }
|
|
|
|
template <typename Char>
|
|
FMT_CONSTEXPR const Char *pointer_from(null_terminating_iterator<Char> it) {
|
|
return it.ptr_;
|
|
}
|
|
|
|
// An output iterator that counts the number of objects written to it and
|
|
// discards them.
|
|
template <typename T>
|
|
class counting_iterator {
|
|
private:
|
|
std::size_t count_;
|
|
mutable T blackhole_;
|
|
|
|
public:
|
|
typedef std::output_iterator_tag iterator_category;
|
|
typedef T value_type;
|
|
typedef std::ptrdiff_t difference_type;
|
|
typedef T* pointer;
|
|
typedef T& reference;
|
|
typedef counting_iterator _Unchecked_type; // Mark iterator as checked.
|
|
|
|
counting_iterator(): count_(0) {}
|
|
|
|
std::size_t count() const { return count_; }
|
|
|
|
counting_iterator& operator++() {
|
|
++count_;
|
|
return *this;
|
|
}
|
|
|
|
counting_iterator operator++(int) {
|
|
auto it = *this;
|
|
++*this;
|
|
return it;
|
|
}
|
|
|
|
T &operator*() const { return blackhole_; }
|
|
};
|
|
|
|
// An output iterator that truncates the output and counts the number of objects
|
|
// written to it.
|
|
template <typename OutputIt>
|
|
class truncating_iterator {
|
|
private:
|
|
typedef std::iterator_traits<OutputIt> traits;
|
|
|
|
OutputIt out_;
|
|
std::size_t limit_;
|
|
std::size_t count_;
|
|
mutable typename traits::value_type blackhole_;
|
|
|
|
public:
|
|
typedef std::output_iterator_tag iterator_category;
|
|
typedef typename traits::value_type value_type;
|
|
typedef typename traits::difference_type difference_type;
|
|
typedef typename traits::pointer pointer;
|
|
typedef typename traits::reference reference;
|
|
typedef truncating_iterator _Unchecked_type; // Mark iterator as checked.
|
|
|
|
truncating_iterator(OutputIt out, std::size_t limit)
|
|
: out_(out), limit_(limit), count_(0) {}
|
|
|
|
OutputIt base() const { return out_; }
|
|
std::size_t count() const { return count_; }
|
|
|
|
truncating_iterator& operator++() {
|
|
if (count_++ < limit_)
|
|
++out_;
|
|
return *this;
|
|
}
|
|
|
|
truncating_iterator operator++(int) {
|
|
auto it = *this;
|
|
++*this;
|
|
return it;
|
|
}
|
|
|
|
reference operator*() const { return count_ < limit_ ? *out_ : blackhole_; }
|
|
};
|
|
|
|
// 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_CONSTEXPR typename std::enable_if<
|
|
std::numeric_limits<T>::is_signed, bool>::type is_negative(T value) {
|
|
return value < 0;
|
|
}
|
|
template <typename T>
|
|
FMT_CONSTEXPR typename std::enable_if<
|
|
!std::numeric_limits<T>::is_signed, bool>::type is_negative(T) {
|
|
return false;
|
|
}
|
|
|
|
template <typename T>
|
|
struct int_traits {
|
|
// Smallest of uint32_t and uint64_t that is large enough to represent
|
|
// all values of T.
|
|
typedef typename std::conditional<
|
|
std::numeric_limits<T>::digits <= 32, uint32_t, uint64_t>::type main_type;
|
|
};
|
|
|
|
// Static data is placed in this class template to allow header-only
|
|
// configuration.
|
|
template <typename T = void>
|
|
struct FMT_API basic_data {
|
|
static const uint32_t POWERS_OF_10_32[];
|
|
static const uint32_t ZERO_OR_POWERS_OF_10_32[];
|
|
static const uint64_t ZERO_OR_POWERS_OF_10_64[];
|
|
static const uint64_t POW10_SIGNIFICANDS[];
|
|
static const int16_t POW10_EXPONENTS[];
|
|
static const char DIGITS[];
|
|
static const char FOREGROUND_COLOR[];
|
|
static const char BACKGROUND_COLOR[];
|
|
static const char RESET_COLOR[];
|
|
static const wchar_t WRESET_COLOR[];
|
|
};
|
|
|
|
#if FMT_USE_EXTERN_TEMPLATES
|
|
extern template struct basic_data<void>;
|
|
#endif
|
|
|
|
typedef basic_data<> data;
|
|
|
|
#ifdef FMT_BUILTIN_CLZLL
|
|
// Returns the number of decimal digits in n. Leading zeros are not counted
|
|
// except for n == 0 in which case count_digits returns 1.
|
|
inline unsigned count_digits(uint64_t n) {
|
|
// Based on http://graphics.stanford.edu/~seander/bithacks.html#IntegerLog10
|
|
// and the benchmark https://github.com/localvoid/cxx-benchmark-count-digits.
|
|
int t = (64 - FMT_BUILTIN_CLZLL(n | 1)) * 1233 >> 12;
|
|
return to_unsigned(t) - (n < data::ZERO_OR_POWERS_OF_10_64[t]) + 1;
|
|
}
|
|
#else
|
|
// Fallback version of count_digits used when __builtin_clz is not available.
|
|
inline unsigned count_digits(uint64_t n) {
|
|
unsigned count = 1;
|
|
for (;;) {
|
|
// Integer division is slow so do it for a group of four digits instead
|
|
// of for every digit. The idea comes from the talk by Alexandrescu
|
|
// "Three Optimization Tips for C++". See speed-test for a comparison.
|
|
if (n < 10) return count;
|
|
if (n < 100) return count + 1;
|
|
if (n < 1000) return count + 2;
|
|
if (n < 10000) return count + 3;
|
|
n /= 10000u;
|
|
count += 4;
|
|
}
|
|
}
|
|
#endif
|
|
|
|
template <typename Char>
|
|
inline size_t count_code_points(basic_string_view<Char> s) { return s.size(); }
|
|
|
|
// Counts the number of code points in a UTF-8 string.
|
|
FMT_API size_t count_code_points(basic_string_view<char8_t> s);
|
|
|
|
inline char8_t to_char8_t(char c) { return static_cast<char8_t>(c); }
|
|
|
|
template <typename InputIt, typename OutChar>
|
|
struct needs_conversion: std::integral_constant<bool,
|
|
std::is_same<
|
|
typename std::iterator_traits<InputIt>::value_type, char>::value &&
|
|
std::is_same<OutChar, char8_t>::value> {};
|
|
|
|
template <typename OutChar, typename InputIt, typename OutputIt>
|
|
typename std::enable_if<
|
|
!needs_conversion<InputIt, OutChar>::value, OutputIt>::type
|
|
copy_str(InputIt begin, InputIt end, OutputIt it) {
|
|
return std::copy(begin, end, it);
|
|
}
|
|
|
|
template <typename OutChar, typename InputIt, typename OutputIt>
|
|
typename std::enable_if<
|
|
needs_conversion<InputIt, OutChar>::value, OutputIt>::type
|
|
copy_str(InputIt begin, InputIt end, OutputIt it) {
|
|
return std::transform(begin, end, it, to_char8_t);
|
|
}
|
|
|
|
#if FMT_HAS_CPP_ATTRIBUTE(always_inline)
|
|
# define FMT_ALWAYS_INLINE __attribute__((always_inline))
|
|
#else
|
|
# define FMT_ALWAYS_INLINE
|
|
#endif
|
|
|
|
template <typename Handler>
|
|
inline char *lg(uint32_t n, Handler h) FMT_ALWAYS_INLINE;
|
|
|
|
// Computes g = floor(log10(n)) and calls h.on<g>(n);
|
|
template <typename Handler>
|
|
inline char *lg(uint32_t n, Handler h) {
|
|
return n < 100 ? n < 10 ? h.template on<0>(n) : h.template on<1>(n)
|
|
: n < 1000000
|
|
? n < 10000 ? n < 1000 ? h.template on<2>(n)
|
|
: h.template on<3>(n)
|
|
: n < 100000 ? h.template on<4>(n)
|
|
: h.template on<5>(n)
|
|
: n < 100000000 ? n < 10000000 ? h.template on<6>(n)
|
|
: h.template on<7>(n)
|
|
: n < 1000000000 ? h.template on<8>(n)
|
|
: h.template on<9>(n);
|
|
}
|
|
|
|
// An lg handler that formats a decimal number.
|
|
// Usage: lg(n, decimal_formatter(buffer));
|
|
class decimal_formatter {
|
|
private:
|
|
char *buffer_;
|
|
|
|
void write_pair(unsigned N, uint32_t index) {
|
|
std::memcpy(buffer_ + N, data::DIGITS + index * 2, 2);
|
|
}
|
|
|
|
public:
|
|
explicit decimal_formatter(char *buf) : buffer_(buf) {}
|
|
|
|
template <unsigned N> char *on(uint32_t u) {
|
|
if (N == 0) {
|
|
*buffer_ = static_cast<char>(u) + '0';
|
|
} else if (N == 1) {
|
|
write_pair(0, u);
|
|
} else {
|
|
// The idea of using 4.32 fixed-point numbers is based on
|
|
// https://github.com/jeaiii/itoa
|
|
unsigned n = N - 1;
|
|
unsigned a = n / 5 * n * 53 / 16;
|
|
uint64_t t = ((1ULL << (32 + a)) /
|
|
data::ZERO_OR_POWERS_OF_10_32[n] + 1 - n / 9);
|
|
t = ((t * u) >> a) + n / 5 * 4;
|
|
write_pair(0, t >> 32);
|
|
for (unsigned i = 2; i < N; i += 2) {
|
|
t = 100ULL * static_cast<uint32_t>(t);
|
|
write_pair(i, t >> 32);
|
|
}
|
|
if (N % 2 == 0) {
|
|
buffer_[N] = static_cast<char>(
|
|
(10ULL * static_cast<uint32_t>(t)) >> 32) + '0';
|
|
}
|
|
}
|
|
return buffer_ += N + 1;
|
|
}
|
|
};
|
|
|
|
// An lg handler that formats a decimal number with a terminating null.
|
|
class decimal_formatter_null : public decimal_formatter {
|
|
public:
|
|
explicit decimal_formatter_null(char *buf) : decimal_formatter(buf) {}
|
|
|
|
template <unsigned N> char *on(uint32_t u) {
|
|
char *buf = decimal_formatter::on<N>(u);
|
|
*buf = '\0';
|
|
return buf;
|
|
}
|
|
};
|
|
|
|
#ifdef FMT_BUILTIN_CLZ
|
|
// Optional version of count_digits for better performance on 32-bit platforms.
|
|
inline unsigned count_digits(uint32_t n) {
|
|
int t = (32 - FMT_BUILTIN_CLZ(n | 1)) * 1233 >> 12;
|
|
return to_unsigned(t) - (n < data::ZERO_OR_POWERS_OF_10_32[t]) + 1;
|
|
}
|
|
#endif
|
|
|
|
// A functor that doesn't add a thousands separator.
|
|
struct no_thousands_sep {
|
|
typedef char char_type;
|
|
|
|
template <typename Char>
|
|
void operator()(Char *) {}
|
|
};
|
|
|
|
// A functor that adds a thousands separator.
|
|
template <typename Char>
|
|
class add_thousands_sep {
|
|
private:
|
|
basic_string_view<Char> sep_;
|
|
|
|
// Index of a decimal digit with the least significant digit having index 0.
|
|
unsigned digit_index_;
|
|
|
|
public:
|
|
typedef Char char_type;
|
|
|
|
explicit add_thousands_sep(basic_string_view<Char> sep)
|
|
: sep_(sep), digit_index_(0) {}
|
|
|
|
void operator()(Char *&buffer) {
|
|
if (++digit_index_ % 3 != 0)
|
|
return;
|
|
buffer -= sep_.size();
|
|
std::uninitialized_copy(sep_.data(), sep_.data() + sep_.size(),
|
|
internal::make_checked(buffer, sep_.size()));
|
|
}
|
|
};
|
|
|
|
template <typename Char>
|
|
FMT_API Char thousands_sep(locale_provider *lp);
|
|
|
|
// Formats a decimal unsigned integer value writing into buffer.
|
|
// thousands_sep is a functor that is called after writing each char to
|
|
// add a thousands separator if necessary.
|
|
template <typename UInt, typename Char, typename ThousandsSep>
|
|
inline Char *format_decimal(Char *buffer, UInt value, unsigned num_digits,
|
|
ThousandsSep thousands_sep) {
|
|
buffer += num_digits;
|
|
Char *end = buffer;
|
|
while (value >= 100) {
|
|
// Integer division is slow so do it for a group of two digits instead
|
|
// of for every digit. The idea comes from the talk by Alexandrescu
|
|
// "Three Optimization Tips for C++". See speed-test for a comparison.
|
|
unsigned index = static_cast<unsigned>((value % 100) * 2);
|
|
value /= 100;
|
|
*--buffer = static_cast<Char>(data::DIGITS[index + 1]);
|
|
thousands_sep(buffer);
|
|
*--buffer = static_cast<Char>(data::DIGITS[index]);
|
|
thousands_sep(buffer);
|
|
}
|
|
if (value < 10) {
|
|
*--buffer = static_cast<Char>('0' + value);
|
|
return end;
|
|
}
|
|
unsigned index = static_cast<unsigned>(value * 2);
|
|
*--buffer = static_cast<Char>(data::DIGITS[index + 1]);
|
|
thousands_sep(buffer);
|
|
*--buffer = static_cast<Char>(data::DIGITS[index]);
|
|
return end;
|
|
}
|
|
|
|
template <typename OutChar, typename UInt, typename Iterator,
|
|
typename ThousandsSep>
|
|
inline Iterator format_decimal(
|
|
Iterator out, UInt value, unsigned num_digits, ThousandsSep sep) {
|
|
typedef typename ThousandsSep::char_type char_type;
|
|
// Buffer should be large enough to hold all digits (digits10 + 1) and null.
|
|
char_type buffer[std::numeric_limits<UInt>::digits10 + 2];
|
|
format_decimal(buffer, value, num_digits, sep);
|
|
return internal::copy_str<OutChar>(buffer, buffer + num_digits, out);
|
|
}
|
|
|
|
template <typename OutChar, typename It, typename UInt>
|
|
inline It format_decimal(It out, UInt value, unsigned num_digits) {
|
|
return format_decimal<OutChar>(out, value, num_digits, no_thousands_sep());
|
|
}
|
|
|
|
template <unsigned BASE_BITS, typename Char, typename UInt>
|
|
inline Char *format_uint(Char *buffer, UInt value, unsigned num_digits,
|
|
bool upper = false) {
|
|
buffer += num_digits;
|
|
Char *end = buffer;
|
|
do {
|
|
const char *digits = upper ? "0123456789ABCDEF" : "0123456789abcdef";
|
|
unsigned digit = (value & ((1 << BASE_BITS) - 1));
|
|
*--buffer = static_cast<Char>(BASE_BITS < 4 ? '0' + digit : digits[digit]);
|
|
} while ((value >>= BASE_BITS) != 0);
|
|
return end;
|
|
}
|
|
|
|
template <unsigned BASE_BITS, typename Char, typename It, typename UInt>
|
|
inline It format_uint(It out, UInt value, unsigned num_digits,
|
|
bool upper = false) {
|
|
// Buffer should be large enough to hold all digits (digits / BASE_BITS + 1)
|
|
// and null.
|
|
char buffer[std::numeric_limits<UInt>::digits / BASE_BITS + 2];
|
|
format_uint<BASE_BITS>(buffer, value, num_digits, upper);
|
|
return internal::copy_str<Char>(buffer, buffer + num_digits, out);
|
|
}
|
|
|
|
#ifndef _WIN32
|
|
# define FMT_USE_WINDOWS_H 0
|
|
#elif !defined(FMT_USE_WINDOWS_H)
|
|
# define FMT_USE_WINDOWS_H 1
|
|
#endif
|
|
|
|
// Define FMT_USE_WINDOWS_H to 0 to disable use of windows.h.
|
|
// All the functionality that relies on it will be disabled too.
|
|
#if FMT_USE_WINDOWS_H
|
|
// A converter from UTF-8 to UTF-16.
|
|
// It is only provided for Windows since other systems support UTF-8 natively.
|
|
class utf8_to_utf16 {
|
|
private:
|
|
wmemory_buffer buffer_;
|
|
|
|
public:
|
|
FMT_API explicit utf8_to_utf16(string_view s);
|
|
operator wstring_view() const { return wstring_view(&buffer_[0], size()); }
|
|
size_t size() const { return buffer_.size() - 1; }
|
|
const wchar_t *c_str() const { return &buffer_[0]; }
|
|
std::wstring str() const { return std::wstring(&buffer_[0], size()); }
|
|
};
|
|
|
|
// A converter from UTF-16 to UTF-8.
|
|
// It is only provided for Windows since other systems support UTF-8 natively.
|
|
class utf16_to_utf8 {
|
|
private:
|
|
memory_buffer buffer_;
|
|
|
|
public:
|
|
utf16_to_utf8() {}
|
|
FMT_API explicit utf16_to_utf8(wstring_view s);
|
|
operator string_view() const { return string_view(&buffer_[0], size()); }
|
|
size_t size() const { return buffer_.size() - 1; }
|
|
const char *c_str() const { return &buffer_[0]; }
|
|
std::string str() const { return std::string(&buffer_[0], size()); }
|
|
|
|
// Performs conversion returning a system error code instead of
|
|
// throwing exception on conversion error. This method may still throw
|
|
// in case of memory allocation error.
|
|
FMT_API int convert(wstring_view s);
|
|
};
|
|
|
|
FMT_API void format_windows_error(fmt::internal::buffer &out, int error_code,
|
|
fmt::string_view message) FMT_NOEXCEPT;
|
|
#endif
|
|
|
|
template <typename T = void>
|
|
struct null {};
|
|
} // namespace internal
|
|
|
|
enum alignment {
|
|
ALIGN_DEFAULT, ALIGN_LEFT, ALIGN_RIGHT, ALIGN_CENTER, ALIGN_NUMERIC
|
|
};
|
|
|
|
// Flags.
|
|
enum {SIGN_FLAG = 1, PLUS_FLAG = 2, MINUS_FLAG = 4, HASH_FLAG = 8};
|
|
|
|
enum format_spec_tag {fill_tag, align_tag, width_tag, type_tag};
|
|
|
|
// Format specifier.
|
|
template <typename T, format_spec_tag>
|
|
class format_spec {
|
|
private:
|
|
T value_;
|
|
|
|
public:
|
|
typedef T value_type;
|
|
|
|
explicit format_spec(T value) : value_(value) {}
|
|
|
|
T value() const { return value_; }
|
|
};
|
|
|
|
// template <typename Char>
|
|
// typedef format_spec<Char, fill_tag> fill_spec;
|
|
template <typename Char>
|
|
class fill_spec : public format_spec<Char, fill_tag> {
|
|
public:
|
|
explicit fill_spec(Char value) : format_spec<Char, fill_tag>(value) {}
|
|
};
|
|
|
|
typedef format_spec<unsigned, width_tag> width_spec;
|
|
typedef format_spec<char, type_tag> type_spec;
|
|
|
|
// An empty format specifier.
|
|
struct empty_spec {};
|
|
|
|
// An alignment specifier.
|
|
struct align_spec : empty_spec {
|
|
unsigned width_;
|
|
// Fill is always wchar_t and cast to char if necessary to avoid having
|
|
// two specialization of AlignSpec and its subclasses.
|
|
wchar_t fill_;
|
|
alignment align_;
|
|
|
|
FMT_CONSTEXPR align_spec(
|
|
unsigned width, wchar_t fill, alignment align = ALIGN_DEFAULT)
|
|
: width_(width), fill_(fill), align_(align) {}
|
|
|
|
FMT_CONSTEXPR unsigned width() const { return width_; }
|
|
FMT_CONSTEXPR wchar_t fill() const { return fill_; }
|
|
FMT_CONSTEXPR alignment align() const { return align_; }
|
|
|
|
int precision() const { return -1; }
|
|
};
|
|
|
|
// Format specifiers.
|
|
template <typename Char>
|
|
class basic_format_specs : public align_spec {
|
|
public:
|
|
unsigned flags_;
|
|
int precision_;
|
|
char type_;
|
|
|
|
FMT_CONSTEXPR basic_format_specs(
|
|
unsigned width = 0, char type = 0, wchar_t fill = ' ')
|
|
: align_spec(width, fill), flags_(0), precision_(-1), type_(type) {}
|
|
|
|
FMT_CONSTEXPR bool flag(unsigned f) const { return (flags_ & f) != 0; }
|
|
FMT_CONSTEXPR int precision() const { return precision_; }
|
|
FMT_CONSTEXPR char type() const { return type_; }
|
|
};
|
|
|
|
typedef basic_format_specs<char> format_specs;
|
|
|
|
template <typename Char, typename ErrorHandler>
|
|
FMT_CONSTEXPR unsigned basic_parse_context<Char, ErrorHandler>::next_arg_id() {
|
|
if (next_arg_id_ >= 0)
|
|
return internal::to_unsigned(next_arg_id_++);
|
|
on_error("cannot switch from manual to automatic argument indexing");
|
|
return 0;
|
|
}
|
|
|
|
namespace internal {
|
|
|
|
template <typename S>
|
|
struct format_string_traits<
|
|
S, typename std::enable_if<std::is_base_of<compile_string, S>::value>::type>:
|
|
format_string_traits_base<char> {};
|
|
|
|
template <typename Handler>
|
|
FMT_CONSTEXPR void handle_int_type_spec(char spec, Handler &&handler) {
|
|
switch (spec) {
|
|
case 0: case 'd':
|
|
handler.on_dec();
|
|
break;
|
|
case 'x': case 'X':
|
|
handler.on_hex();
|
|
break;
|
|
case 'b': case 'B':
|
|
handler.on_bin();
|
|
break;
|
|
case 'o':
|
|
handler.on_oct();
|
|
break;
|
|
case 'n':
|
|
handler.on_num();
|
|
break;
|
|
default:
|
|
handler.on_error();
|
|
}
|
|
}
|
|
|
|
template <typename Handler>
|
|
FMT_CONSTEXPR void handle_float_type_spec(char spec, Handler &&handler) {
|
|
switch (spec) {
|
|
case 0: case 'g': case 'G':
|
|
handler.on_general();
|
|
break;
|
|
case 'e': case 'E':
|
|
handler.on_exp();
|
|
break;
|
|
case 'f': case 'F':
|
|
handler.on_fixed();
|
|
break;
|
|
case 'a': case 'A':
|
|
handler.on_hex();
|
|
break;
|
|
default:
|
|
handler.on_error();
|
|
break;
|
|
}
|
|
}
|
|
|
|
template <typename Char, typename Handler>
|
|
FMT_CONSTEXPR void handle_char_specs(
|
|
const basic_format_specs<Char> *specs, Handler &&handler) {
|
|
if (!specs) return handler.on_char();
|
|
if (specs->type() && specs->type() != 'c') return handler.on_int();
|
|
if (specs->align() == ALIGN_NUMERIC || specs->flag(~0u) != 0)
|
|
handler.on_error("invalid format specifier for char");
|
|
handler.on_char();
|
|
}
|
|
|
|
template <typename Char, typename Handler>
|
|
FMT_CONSTEXPR void handle_cstring_type_spec(Char spec, Handler &&handler) {
|
|
if (spec == 0 || spec == 's')
|
|
handler.on_string();
|
|
else if (spec == 'p')
|
|
handler.on_pointer();
|
|
else
|
|
handler.on_error("invalid type specifier");
|
|
}
|
|
|
|
template <typename Char, typename ErrorHandler>
|
|
FMT_CONSTEXPR void check_string_type_spec(Char spec, ErrorHandler &&eh) {
|
|
if (spec != 0 && spec != 's')
|
|
eh.on_error("invalid type specifier");
|
|
}
|
|
|
|
template <typename Char, typename ErrorHandler>
|
|
FMT_CONSTEXPR void check_pointer_type_spec(Char spec, ErrorHandler &&eh) {
|
|
if (spec != 0 && spec != 'p')
|
|
eh.on_error("invalid type specifier");
|
|
}
|
|
|
|
template <typename ErrorHandler>
|
|
class int_type_checker : private ErrorHandler {
|
|
public:
|
|
FMT_CONSTEXPR explicit int_type_checker(ErrorHandler eh) : ErrorHandler(eh) {}
|
|
|
|
FMT_CONSTEXPR void on_dec() {}
|
|
FMT_CONSTEXPR void on_hex() {}
|
|
FMT_CONSTEXPR void on_bin() {}
|
|
FMT_CONSTEXPR void on_oct() {}
|
|
FMT_CONSTEXPR void on_num() {}
|
|
|
|
FMT_CONSTEXPR void on_error() {
|
|
ErrorHandler::on_error("invalid type specifier");
|
|
}
|
|
};
|
|
|
|
template <typename ErrorHandler>
|
|
class float_type_checker : private ErrorHandler {
|
|
public:
|
|
FMT_CONSTEXPR explicit float_type_checker(ErrorHandler eh)
|
|
: ErrorHandler(eh) {}
|
|
|
|
FMT_CONSTEXPR void on_general() {}
|
|
FMT_CONSTEXPR void on_exp() {}
|
|
FMT_CONSTEXPR void on_fixed() {}
|
|
FMT_CONSTEXPR void on_hex() {}
|
|
|
|
FMT_CONSTEXPR void on_error() {
|
|
ErrorHandler::on_error("invalid type specifier");
|
|
}
|
|
};
|
|
|
|
template <typename ErrorHandler>
|
|
class char_specs_checker : public ErrorHandler {
|
|
private:
|
|
char type_;
|
|
|
|
public:
|
|
FMT_CONSTEXPR char_specs_checker(char type, ErrorHandler eh)
|
|
: ErrorHandler(eh), type_(type) {}
|
|
|
|
FMT_CONSTEXPR void on_int() {
|
|
handle_int_type_spec(type_, int_type_checker<ErrorHandler>(*this));
|
|
}
|
|
FMT_CONSTEXPR void on_char() {}
|
|
};
|
|
|
|
template <typename ErrorHandler>
|
|
class cstring_type_checker : public ErrorHandler {
|
|
public:
|
|
FMT_CONSTEXPR explicit cstring_type_checker(ErrorHandler eh)
|
|
: ErrorHandler(eh) {}
|
|
|
|
FMT_CONSTEXPR void on_string() {}
|
|
FMT_CONSTEXPR void on_pointer() {}
|
|
};
|
|
|
|
template <typename Context>
|
|
void arg_map<Context>::init(const basic_format_args<Context> &args) {
|
|
if (map_)
|
|
return;
|
|
map_ = new entry[args.max_size()];
|
|
bool use_values = args.type(max_packed_args - 1) == internal::none_type;
|
|
if (use_values) {
|
|
for (unsigned i = 0;/*nothing*/; ++i) {
|
|
internal::type arg_type = args.type(i);
|
|
switch (arg_type) {
|
|
case internal::none_type:
|
|
return;
|
|
case internal::named_arg_type:
|
|
push_back(args.values_[i]);
|
|
break;
|
|
default:
|
|
break; // Do nothing.
|
|
}
|
|
}
|
|
}
|
|
for (unsigned i = 0; ; ++i) {
|
|
switch (args.args_[i].type_) {
|
|
case internal::none_type:
|
|
return;
|
|
case internal::named_arg_type:
|
|
push_back(args.args_[i].value_);
|
|
break;
|
|
default:
|
|
break; // Do nothing.
|
|
}
|
|
}
|
|
}
|
|
|
|
template <typename Range>
|
|
class arg_formatter_base {
|
|
public:
|
|
typedef typename Range::value_type char_type;
|
|
typedef decltype(internal::declval<Range>().begin()) iterator;
|
|
typedef basic_format_specs<char_type> format_specs;
|
|
|
|
private:
|
|
typedef basic_writer<Range> writer_type;
|
|
writer_type writer_;
|
|
format_specs *specs_;
|
|
|
|
struct char_writer {
|
|
char_type value;
|
|
|
|
size_t size() const { return 1; }
|
|
|
|
template <typename It>
|
|
void operator()(It &&it) const { *it++ = value; }
|
|
};
|
|
|
|
void write_char(char_type value) {
|
|
if (specs_)
|
|
writer_.write_padded(1, *specs_, char_writer{value});
|
|
else
|
|
writer_.write(value);
|
|
}
|
|
|
|
void write_pointer(const void *p) {
|
|
format_specs specs = specs_ ? *specs_ : format_specs();
|
|
specs.flags_ = HASH_FLAG;
|
|
specs.type_ = 'x';
|
|
writer_.write_int(reinterpret_cast<uintptr_t>(p), specs);
|
|
}
|
|
|
|
protected:
|
|
writer_type &writer() { return writer_; }
|
|
format_specs *spec() { return specs_; }
|
|
iterator out() { return writer_.out(); }
|
|
|
|
void write(bool value) {
|
|
string_view sv(value ? "true" : "false");
|
|
specs_ ? writer_.write_str(sv, *specs_) : writer_.write(sv);
|
|
}
|
|
|
|
void write(const char_type *value) {
|
|
if (!value)
|
|
FMT_THROW(format_error("string pointer is null"));
|
|
auto length = std::char_traits<char_type>::length(value);
|
|
basic_string_view<char_type> sv(value, length);
|
|
specs_ ? writer_.write_str(sv, *specs_) : writer_.write(sv);
|
|
}
|
|
|
|
public:
|
|
arg_formatter_base(Range r, format_specs *s): writer_(r), specs_(s) {}
|
|
|
|
iterator operator()(monostate) {
|
|
FMT_ASSERT(false, "invalid argument type");
|
|
return out();
|
|
}
|
|
|
|
template <typename T>
|
|
typename std::enable_if<
|
|
std::is_integral<T>::value || std::is_same<T, char_type>::value,
|
|
iterator>::type operator()(T value) {
|
|
// MSVC2013 fails to compile separate overloads for bool and char_type so
|
|
// use std::is_same instead.
|
|
if (std::is_same<T, bool>::value) {
|
|
if (specs_ && specs_->type_)
|
|
return (*this)(value ? 1 : 0);
|
|
write(value != 0);
|
|
} else if (std::is_same<T, char_type>::value) {
|
|
internal::handle_char_specs(
|
|
specs_, char_spec_handler(*this, static_cast<char_type>(value)));
|
|
} else {
|
|
specs_ ? writer_.write_int(value, *specs_) : writer_.write(value);
|
|
}
|
|
return out();
|
|
}
|
|
|
|
template <typename T>
|
|
typename std::enable_if<std::is_floating_point<T>::value, iterator>::type
|
|
operator()(T value) {
|
|
writer_.write_double(value, specs_ ? *specs_ : format_specs());
|
|
return out();
|
|
}
|
|
|
|
struct char_spec_handler : internal::error_handler {
|
|
arg_formatter_base &formatter;
|
|
char_type value;
|
|
|
|
char_spec_handler(arg_formatter_base& f, char_type val)
|
|
: formatter(f), value(val) {}
|
|
|
|
void on_int() {
|
|
if (formatter.specs_)
|
|
formatter.writer_.write_int(value, *formatter.specs_);
|
|
else
|
|
formatter.writer_.write(value);
|
|
}
|
|
void on_char() { formatter.write_char(value); }
|
|
};
|
|
|
|
struct cstring_spec_handler : internal::error_handler {
|
|
arg_formatter_base &formatter;
|
|
const char_type *value;
|
|
|
|
cstring_spec_handler(arg_formatter_base &f, const char_type *val)
|
|
: formatter(f), value(val) {}
|
|
|
|
void on_string() { formatter.write(value); }
|
|
void on_pointer() { formatter.write_pointer(value); }
|
|
};
|
|
|
|
iterator operator()(const char_type *value) {
|
|
if (!specs_) return write(value), out();
|
|
internal::handle_cstring_type_spec(
|
|
specs_->type_, cstring_spec_handler(*this, value));
|
|
return out();
|
|
}
|
|
|
|
iterator operator()(basic_string_view<char_type> value) {
|
|
if (specs_) {
|
|
internal::check_string_type_spec(
|
|
specs_->type_, internal::error_handler());
|
|
writer_.write_str(value, *specs_);
|
|
} else {
|
|
writer_.write(value);
|
|
}
|
|
return out();
|
|
}
|
|
|
|
iterator operator()(const void *value) {
|
|
if (specs_)
|
|
check_pointer_type_spec(specs_->type_, internal::error_handler());
|
|
write_pointer(value);
|
|
return out();
|
|
}
|
|
};
|
|
|
|
template <typename Char>
|
|
FMT_CONSTEXPR bool is_name_start(Char c) {
|
|
return ('a' <= c && c <= 'z') || ('A' <= c && c <= 'Z') || '_' == c;
|
|
}
|
|
|
|
// DEPRECATED: Parses the input as an unsigned integer. This function assumes
|
|
// that the first character is a digit and presence of a non-digit character at
|
|
// the end.
|
|
// it: an iterator pointing to the beginning of the input range.
|
|
template <typename Iterator, typename ErrorHandler>
|
|
FMT_CONSTEXPR unsigned parse_nonnegative_int(Iterator &it, ErrorHandler &&eh) {
|
|
assert('0' <= *it && *it <= '9');
|
|
unsigned value = 0;
|
|
// Convert to unsigned to prevent a warning.
|
|
unsigned max_int = (std::numeric_limits<int>::max)();
|
|
unsigned big = max_int / 10;
|
|
do {
|
|
// Check for overflow.
|
|
if (value > big) {
|
|
value = max_int + 1;
|
|
break;
|
|
}
|
|
value = value * 10 + unsigned(*it - '0');
|
|
// Workaround for MSVC "setup_exception stack overflow" error:
|
|
auto next = it;
|
|
++next;
|
|
it = next;
|
|
} while ('0' <= *it && *it <= '9');
|
|
if (value > max_int)
|
|
eh.on_error("number is too big");
|
|
return value;
|
|
}
|
|
|
|
// Parses the range [begin, end) as an unsigned integer. This function assumes
|
|
// that the range is non-empty and the first character is a digit.
|
|
template <typename Char, typename ErrorHandler>
|
|
FMT_CONSTEXPR unsigned parse_nonnegative_int(
|
|
const Char *&begin, const Char *end, ErrorHandler &&eh) {
|
|
assert(begin != end && '0' <= *begin && *begin <= '9');
|
|
unsigned value = 0;
|
|
// Convert to unsigned to prevent a warning.
|
|
unsigned max_int = (std::numeric_limits<int>::max)();
|
|
unsigned big = max_int / 10;
|
|
do {
|
|
// Check for overflow.
|
|
if (value > big) {
|
|
value = max_int + 1;
|
|
break;
|
|
}
|
|
value = value * 10 + unsigned(*begin++ - '0');
|
|
} while (begin != end && '0' <= *begin && *begin <= '9');
|
|
if (value > max_int)
|
|
eh.on_error("number is too big");
|
|
return value;
|
|
}
|
|
|
|
template <typename Char, typename Context>
|
|
class custom_formatter: public function<bool> {
|
|
private:
|
|
Context &ctx_;
|
|
|
|
public:
|
|
explicit custom_formatter(Context &ctx): ctx_(ctx) {}
|
|
|
|
bool operator()(typename basic_format_arg<Context>::handle h) const {
|
|
h.format(ctx_);
|
|
return true;
|
|
}
|
|
|
|
template <typename T>
|
|
bool operator()(T) const { return false; }
|
|
};
|
|
|
|
template <typename T>
|
|
struct is_integer {
|
|
enum {
|
|
value = std::is_integral<T>::value && !std::is_same<T, bool>::value &&
|
|
!std::is_same<T, char>::value && !std::is_same<T, wchar_t>::value
|
|
};
|
|
};
|
|
|
|
template <typename ErrorHandler>
|
|
class width_checker: public function<unsigned long long> {
|
|
public:
|
|
explicit FMT_CONSTEXPR width_checker(ErrorHandler &eh) : handler_(eh) {}
|
|
|
|
template <typename T>
|
|
FMT_CONSTEXPR
|
|
typename std::enable_if<
|
|
is_integer<T>::value, unsigned long long>::type operator()(T value) {
|
|
if (is_negative(value))
|
|
handler_.on_error("negative width");
|
|
return static_cast<unsigned long long>(value);
|
|
}
|
|
|
|
template <typename T>
|
|
FMT_CONSTEXPR typename std::enable_if<
|
|
!is_integer<T>::value, unsigned long long>::type operator()(T) {
|
|
handler_.on_error("width is not integer");
|
|
return 0;
|
|
}
|
|
|
|
private:
|
|
ErrorHandler &handler_;
|
|
};
|
|
|
|
template <typename ErrorHandler>
|
|
class precision_checker: public function<unsigned long long> {
|
|
public:
|
|
explicit FMT_CONSTEXPR precision_checker(ErrorHandler &eh) : handler_(eh) {}
|
|
|
|
template <typename T>
|
|
FMT_CONSTEXPR typename std::enable_if<
|
|
is_integer<T>::value, unsigned long long>::type operator()(T value) {
|
|
if (is_negative(value))
|
|
handler_.on_error("negative precision");
|
|
return static_cast<unsigned long long>(value);
|
|
}
|
|
|
|
template <typename T>
|
|
FMT_CONSTEXPR typename std::enable_if<
|
|
!is_integer<T>::value, unsigned long long>::type operator()(T) {
|
|
handler_.on_error("precision is not integer");
|
|
return 0;
|
|
}
|
|
|
|
private:
|
|
ErrorHandler &handler_;
|
|
};
|
|
|
|
// A format specifier handler that sets fields in basic_format_specs.
|
|
template <typename Char>
|
|
class specs_setter {
|
|
public:
|
|
explicit FMT_CONSTEXPR specs_setter(basic_format_specs<Char> &specs):
|
|
specs_(specs) {}
|
|
|
|
FMT_CONSTEXPR specs_setter(const specs_setter &other): specs_(other.specs_) {}
|
|
|
|
FMT_CONSTEXPR void on_align(alignment align) { specs_.align_ = align; }
|
|
FMT_CONSTEXPR void on_fill(Char fill) { specs_.fill_ = fill; }
|
|
FMT_CONSTEXPR void on_plus() { specs_.flags_ |= SIGN_FLAG | PLUS_FLAG; }
|
|
FMT_CONSTEXPR void on_minus() { specs_.flags_ |= MINUS_FLAG; }
|
|
FMT_CONSTEXPR void on_space() { specs_.flags_ |= SIGN_FLAG; }
|
|
FMT_CONSTEXPR void on_hash() { specs_.flags_ |= HASH_FLAG; }
|
|
|
|
FMT_CONSTEXPR void on_zero() {
|
|
specs_.align_ = ALIGN_NUMERIC;
|
|
specs_.fill_ = '0';
|
|
}
|
|
|
|
FMT_CONSTEXPR void on_width(unsigned width) { specs_.width_ = width; }
|
|
FMT_CONSTEXPR void on_precision(unsigned precision) {
|
|
specs_.precision_ = static_cast<int>(precision);
|
|
}
|
|
FMT_CONSTEXPR void end_precision() {}
|
|
|
|
FMT_CONSTEXPR void on_type(Char type) {
|
|
specs_.type_ = static_cast<char>(type);
|
|
}
|
|
|
|
protected:
|
|
basic_format_specs<Char> &specs_;
|
|
};
|
|
|
|
// A format specifier handler that checks if specifiers are consistent with the
|
|
// argument type.
|
|
template <typename Handler>
|
|
class specs_checker : public Handler {
|
|
public:
|
|
FMT_CONSTEXPR specs_checker(const Handler& handler, internal::type arg_type)
|
|
: Handler(handler), arg_type_(arg_type) {}
|
|
|
|
FMT_CONSTEXPR specs_checker(const specs_checker &other)
|
|
: Handler(other), arg_type_(other.arg_type_) {}
|
|
|
|
FMT_CONSTEXPR void on_align(alignment align) {
|
|
if (align == ALIGN_NUMERIC)
|
|
require_numeric_argument();
|
|
Handler::on_align(align);
|
|
}
|
|
|
|
FMT_CONSTEXPR void on_plus() {
|
|
check_sign();
|
|
Handler::on_plus();
|
|
}
|
|
|
|
FMT_CONSTEXPR void on_minus() {
|
|
check_sign();
|
|
Handler::on_minus();
|
|
}
|
|
|
|
FMT_CONSTEXPR void on_space() {
|
|
check_sign();
|
|
Handler::on_space();
|
|
}
|
|
|
|
FMT_CONSTEXPR void on_hash() {
|
|
require_numeric_argument();
|
|
Handler::on_hash();
|
|
}
|
|
|
|
FMT_CONSTEXPR void on_zero() {
|
|
require_numeric_argument();
|
|
Handler::on_zero();
|
|
}
|
|
|
|
FMT_CONSTEXPR void end_precision() {
|
|
if (is_integral(arg_type_) || arg_type_ == pointer_type)
|
|
this->on_error("precision not allowed for this argument type");
|
|
}
|
|
|
|
private:
|
|
FMT_CONSTEXPR void require_numeric_argument() {
|
|
if (!is_arithmetic(arg_type_))
|
|
this->on_error("format specifier requires numeric argument");
|
|
}
|
|
|
|
FMT_CONSTEXPR void check_sign() {
|
|
require_numeric_argument();
|
|
if (is_integral(arg_type_) && arg_type_ != int_type &&
|
|
arg_type_ != long_long_type && arg_type_ != internal::char_type) {
|
|
this->on_error("format specifier requires signed argument");
|
|
}
|
|
}
|
|
|
|
internal::type arg_type_;
|
|
};
|
|
|
|
template <template <typename> class Handler, typename T,
|
|
typename Context, typename ErrorHandler>
|
|
FMT_CONSTEXPR void set_dynamic_spec(
|
|
T &value, basic_format_arg<Context> arg, ErrorHandler eh) {
|
|
unsigned long long big_value =
|
|
visit_format_arg(Handler<ErrorHandler>(eh), arg);
|
|
if (big_value > (std::numeric_limits<int>::max)())
|
|
eh.on_error("number is too big");
|
|
value = static_cast<T>(big_value);
|
|
}
|
|
|
|
struct auto_id {};
|
|
|
|
// The standard format specifier handler with checking.
|
|
template <typename Context>
|
|
class specs_handler: public specs_setter<typename Context::char_type> {
|
|
public:
|
|
typedef typename Context::char_type char_type;
|
|
|
|
FMT_CONSTEXPR specs_handler(
|
|
basic_format_specs<char_type> &specs, Context &ctx)
|
|
: specs_setter<char_type>(specs), context_(ctx) {}
|
|
|
|
template <typename Id>
|
|
FMT_CONSTEXPR void on_dynamic_width(Id arg_id) {
|
|
set_dynamic_spec<width_checker>(
|
|
this->specs_.width_, get_arg(arg_id), context_.error_handler());
|
|
}
|
|
|
|
template <typename Id>
|
|
FMT_CONSTEXPR void on_dynamic_precision(Id arg_id) {
|
|
set_dynamic_spec<precision_checker>(
|
|
this->specs_.precision_, get_arg(arg_id), context_.error_handler());
|
|
}
|
|
|
|
void on_error(const char *message) {
|
|
context_.on_error(message);
|
|
}
|
|
|
|
private:
|
|
FMT_CONSTEXPR basic_format_arg<Context> get_arg(auto_id) {
|
|
return context_.next_arg();
|
|
}
|
|
|
|
template <typename Id>
|
|
FMT_CONSTEXPR basic_format_arg<Context> get_arg(Id arg_id) {
|
|
context_.parse_context().check_arg_id(arg_id);
|
|
return context_.get_arg(arg_id);
|
|
}
|
|
|
|
Context &context_;
|
|
};
|
|
|
|
// An argument reference.
|
|
template <typename Char>
|
|
struct arg_ref {
|
|
enum Kind { NONE, INDEX, NAME };
|
|
|
|
FMT_CONSTEXPR arg_ref() : kind(NONE), index(0) {}
|
|
FMT_CONSTEXPR explicit arg_ref(unsigned index) : kind(INDEX), index(index) {}
|
|
explicit arg_ref(basic_string_view<Char> name) : kind(NAME), name(name) {}
|
|
|
|
FMT_CONSTEXPR arg_ref &operator=(unsigned idx) {
|
|
kind = INDEX;
|
|
index = idx;
|
|
return *this;
|
|
}
|
|
|
|
Kind kind;
|
|
FMT_UNION {
|
|
unsigned index;
|
|
basic_string_view<Char> name;
|
|
};
|
|
};
|
|
|
|
// Format specifiers with width and precision resolved at formatting rather
|
|
// than parsing time to allow re-using the same parsed specifiers with
|
|
// differents sets of arguments (precompilation of format strings).
|
|
template <typename Char>
|
|
struct dynamic_format_specs : basic_format_specs<Char> {
|
|
arg_ref<Char> width_ref;
|
|
arg_ref<Char> precision_ref;
|
|
};
|
|
|
|
// Format spec handler that saves references to arguments representing dynamic
|
|
// width and precision to be resolved at formatting time.
|
|
template <typename ParseContext>
|
|
class dynamic_specs_handler :
|
|
public specs_setter<typename ParseContext::char_type> {
|
|
public:
|
|
typedef typename ParseContext::char_type char_type;
|
|
|
|
FMT_CONSTEXPR dynamic_specs_handler(
|
|
dynamic_format_specs<char_type> &specs, ParseContext &ctx)
|
|
: specs_setter<char_type>(specs), specs_(specs), context_(ctx) {}
|
|
|
|
FMT_CONSTEXPR dynamic_specs_handler(const dynamic_specs_handler &other)
|
|
: specs_setter<char_type>(other),
|
|
specs_(other.specs_), context_(other.context_) {}
|
|
|
|
template <typename Id>
|
|
FMT_CONSTEXPR void on_dynamic_width(Id arg_id) {
|
|
specs_.width_ref = make_arg_ref(arg_id);
|
|
}
|
|
|
|
template <typename Id>
|
|
FMT_CONSTEXPR void on_dynamic_precision(Id arg_id) {
|
|
specs_.precision_ref = make_arg_ref(arg_id);
|
|
}
|
|
|
|
FMT_CONSTEXPR void on_error(const char *message) {
|
|
context_.on_error(message);
|
|
}
|
|
|
|
private:
|
|
typedef arg_ref<char_type> arg_ref_type;
|
|
|
|
template <typename Id>
|
|
FMT_CONSTEXPR arg_ref_type make_arg_ref(Id 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());
|
|
}
|
|
|
|
dynamic_format_specs<char_type> &specs_;
|
|
ParseContext &context_;
|
|
};
|
|
|
|
template <typename Iterator, typename IDHandler>
|
|
FMT_CONSTEXPR Iterator parse_arg_id(Iterator it, IDHandler &&handler) {
|
|
typedef typename std::iterator_traits<Iterator>::value_type char_type;
|
|
char_type c = *it;
|
|
if (c == '}' || c == ':') {
|
|
handler();
|
|
return it;
|
|
}
|
|
if (c >= '0' && c <= '9') {
|
|
unsigned index = parse_nonnegative_int(it, handler);
|
|
if (*it != '}' && *it != ':') {
|
|
handler.on_error("invalid format string");
|
|
return it;
|
|
}
|
|
handler(index);
|
|
return it;
|
|
}
|
|
if (!is_name_start(c)) {
|
|
handler.on_error("invalid format string");
|
|
return it;
|
|
}
|
|
auto start = it;
|
|
do {
|
|
c = *++it;
|
|
} while (is_name_start(c) || ('0' <= c && c <= '9'));
|
|
handler(basic_string_view<char_type>(
|
|
pointer_from(start), to_unsigned(it - start)));
|
|
return it;
|
|
}
|
|
|
|
template <typename Char, typename IDHandler>
|
|
FMT_CONSTEXPR const Char *parse_arg_id(
|
|
const Char *begin, const Char *end, IDHandler &&handler) {
|
|
assert(begin != end);
|
|
Char c = *begin;
|
|
if (c == '}' || c == ':')
|
|
return handler(), begin;
|
|
if (c >= '0' && c <= '9') {
|
|
unsigned index = parse_nonnegative_int(begin, end, handler);
|
|
if (begin == end || (*begin != '}' && *begin != ':'))
|
|
return handler.on_error("invalid format string"), begin;
|
|
handler(index);
|
|
return begin;
|
|
}
|
|
if (!is_name_start(c))
|
|
return handler.on_error("invalid format string"), begin;
|
|
auto it = begin;
|
|
do {
|
|
c = *++it;
|
|
} while (it != end && (is_name_start(c) || ('0' <= c && c <= '9')));
|
|
handler(basic_string_view<Char>(begin, to_unsigned(it - begin)));
|
|
return it;
|
|
}
|
|
|
|
// Adapts SpecHandler to IDHandler API for dynamic width.
|
|
template <typename SpecHandler, typename Char>
|
|
struct width_adapter {
|
|
explicit FMT_CONSTEXPR width_adapter(SpecHandler &h) : handler(h) {}
|
|
|
|
FMT_CONSTEXPR void operator()() { handler.on_dynamic_width(auto_id()); }
|
|
FMT_CONSTEXPR void operator()(unsigned id) { handler.on_dynamic_width(id); }
|
|
FMT_CONSTEXPR void operator()(basic_string_view<Char> id) {
|
|
handler.on_dynamic_width(id);
|
|
}
|
|
|
|
FMT_CONSTEXPR void on_error(const char *message) {
|
|
handler.on_error(message);
|
|
}
|
|
|
|
SpecHandler &handler;
|
|
};
|
|
|
|
// Adapts SpecHandler to IDHandler API for dynamic precision.
|
|
template <typename SpecHandler, typename Char>
|
|
struct precision_adapter {
|
|
explicit FMT_CONSTEXPR precision_adapter(SpecHandler &h) : handler(h) {}
|
|
|
|
FMT_CONSTEXPR void operator()() { handler.on_dynamic_precision(auto_id()); }
|
|
FMT_CONSTEXPR void operator()(unsigned id) {
|
|
handler.on_dynamic_precision(id);
|
|
}
|
|
FMT_CONSTEXPR void operator()(basic_string_view<Char> id) {
|
|
handler.on_dynamic_precision(id);
|
|
}
|
|
|
|
FMT_CONSTEXPR void on_error(const char *message) { handler.on_error(message); }
|
|
|
|
SpecHandler &handler;
|
|
};
|
|
|
|
// Parses standard format specifiers and sends notifications about parsed
|
|
// components to handler.
|
|
// it: an iterator pointing to the beginning of a null-terminated range of
|
|
// characters, possibly emulated via null_terminating_iterator, representing
|
|
// format specifiers.
|
|
template <typename Iterator, typename SpecHandler>
|
|
FMT_CONSTEXPR Iterator parse_format_specs(Iterator it, SpecHandler &&handler) {
|
|
typedef typename std::iterator_traits<Iterator>::value_type char_type;
|
|
char_type c = *it;
|
|
if (c == '}' || !c)
|
|
return it;
|
|
|
|
// Parse fill and alignment.
|
|
alignment align = ALIGN_DEFAULT;
|
|
int i = 1;
|
|
do {
|
|
auto p = it + i;
|
|
switch (static_cast<char>(*p)) {
|
|
case '<':
|
|
align = ALIGN_LEFT;
|
|
break;
|
|
case '>':
|
|
align = ALIGN_RIGHT;
|
|
break;
|
|
case '=':
|
|
align = ALIGN_NUMERIC;
|
|
break;
|
|
case '^':
|
|
align = ALIGN_CENTER;
|
|
break;
|
|
}
|
|
if (align != ALIGN_DEFAULT) {
|
|
if (p != it) {
|
|
if (c == '{') {
|
|
handler.on_error("invalid fill character '{'");
|
|
return it;
|
|
}
|
|
it += 2;
|
|
handler.on_fill(c);
|
|
} else ++it;
|
|
handler.on_align(align);
|
|
break;
|
|
}
|
|
} while (--i >= 0);
|
|
|
|
// Parse sign.
|
|
switch (static_cast<char>(*it)) {
|
|
case '+':
|
|
handler.on_plus();
|
|
++it;
|
|
break;
|
|
case '-':
|
|
handler.on_minus();
|
|
++it;
|
|
break;
|
|
case ' ':
|
|
handler.on_space();
|
|
++it;
|
|
break;
|
|
}
|
|
|
|
if (*it == '#') {
|
|
handler.on_hash();
|
|
++it;
|
|
}
|
|
|
|
// Parse zero flag.
|
|
if (*it == '0') {
|
|
handler.on_zero();
|
|
++it;
|
|
}
|
|
|
|
// Parse width.
|
|
if ('0' <= *it && *it <= '9') {
|
|
handler.on_width(parse_nonnegative_int(it, handler));
|
|
} else if (*it == '{') {
|
|
it = parse_arg_id(it + 1, width_adapter<SpecHandler, char_type>(handler));
|
|
if (*it++ != '}') {
|
|
handler.on_error("invalid format string");
|
|
return it;
|
|
}
|
|
}
|
|
|
|
// Parse precision.
|
|
if (*it == '.') {
|
|
++it;
|
|
if ('0' <= *it && *it <= '9') {
|
|
handler.on_precision(parse_nonnegative_int(it, handler));
|
|
} else if (*it == '{') {
|
|
it = parse_arg_id(
|
|
it + 1, precision_adapter<SpecHandler, char_type>(handler));
|
|
if (*it++ != '}') {
|
|
handler.on_error("invalid format string");
|
|
return it;
|
|
}
|
|
} else {
|
|
handler.on_error("missing precision specifier");
|
|
return it;
|
|
}
|
|
handler.end_precision();
|
|
}
|
|
|
|
// Parse type.
|
|
if (*it != '}' && *it)
|
|
handler.on_type(*it++);
|
|
return it;
|
|
}
|
|
|
|
// 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, last - first));
|
|
return out != FMT_NULL;
|
|
}
|
|
|
|
template <typename Handler, typename Char>
|
|
struct id_adapter {
|
|
FMT_CONSTEXPR void operator()() { handler.on_arg_id(); }
|
|
FMT_CONSTEXPR void operator()(unsigned id) { handler.on_arg_id(id); }
|
|
FMT_CONSTEXPR void operator()(basic_string_view<Char> id) {
|
|
handler.on_arg_id(id);
|
|
}
|
|
FMT_CONSTEXPR void on_error(const char *message) {
|
|
handler.on_error(message);
|
|
}
|
|
Handler &handler;
|
|
};
|
|
|
|
template <bool IS_CONSTEXPR, typename Char, typename Handler>
|
|
FMT_CONSTEXPR void parse_format_string(
|
|
basic_string_view<Char> format_str, Handler &&handler) {
|
|
struct writer {
|
|
FMT_CONSTEXPR void operator()(const Char *begin, const Char *end) {
|
|
if (begin == end) return;
|
|
for (;;) {
|
|
const Char *p = FMT_NULL;
|
|
if (!find<IS_CONSTEXPR>(begin, end, '}', p))
|
|
return handler_.on_text(begin, end);
|
|
++p;
|
|
if (p == end || *p != '}')
|
|
return handler_.on_error("unmatched '}' in format string");
|
|
handler_.on_text(begin, p);
|
|
begin = p + 1;
|
|
}
|
|
}
|
|
Handler &handler_;
|
|
} write{handler};
|
|
auto begin = format_str.data();
|
|
auto end = begin + format_str.size();
|
|
while (begin != end) {
|
|
// Doing two passes with memchr (one for '{' and another for '}') is up to
|
|
// 2.5x faster than the naive one-pass implementation on big format strings.
|
|
const Char *p = begin;
|
|
if (*begin != '{' && !find<IS_CONSTEXPR>(begin, end, '{', p))
|
|
return write(begin, end);
|
|
write(begin, p);
|
|
++p;
|
|
if (p == end)
|
|
return handler.on_error("invalid format string");
|
|
if (*p == '}') {
|
|
handler.on_arg_id();
|
|
handler.on_replacement_field(p);
|
|
} else if (*p == '{') {
|
|
handler.on_text(p, p + 1);
|
|
} else {
|
|
p = parse_arg_id(p, end, id_adapter<Handler, Char>{handler});
|
|
Char c = p != end ? *p : Char();
|
|
if (c == '}') {
|
|
handler.on_replacement_field(p);
|
|
} else if (c == ':') {
|
|
internal::null_terminating_iterator<Char> it(p + 1, end);
|
|
it = handler.on_format_specs(it);
|
|
if (*it != '}')
|
|
return handler.on_error("unknown format specifier");
|
|
p = pointer_from(it);
|
|
} else {
|
|
return handler.on_error("missing '}' in format string");
|
|
}
|
|
}
|
|
begin = p + 1;
|
|
}
|
|
}
|
|
|
|
template <typename T, typename ParseContext>
|
|
FMT_CONSTEXPR const typename ParseContext::char_type *
|
|
parse_format_specs(ParseContext &ctx) {
|
|
// GCC 7.2 requires initializer.
|
|
formatter<T, typename ParseContext::char_type> f{};
|
|
return f.parse(ctx);
|
|
}
|
|
|
|
template <typename Char, typename ErrorHandler, typename... Args>
|
|
class format_string_checker {
|
|
public:
|
|
explicit FMT_CONSTEXPR format_string_checker(
|
|
basic_string_view<Char> format_str, ErrorHandler eh)
|
|
: arg_id_(-1), context_(format_str, eh),
|
|
parse_funcs_{&parse_format_specs<Args, parse_context_type>...} {}
|
|
|
|
typedef internal::null_terminating_iterator<Char> iterator;
|
|
|
|
FMT_CONSTEXPR void on_text(const Char *, const Char *) {}
|
|
|
|
FMT_CONSTEXPR void on_arg_id() {
|
|
arg_id_ = context_.next_arg_id();
|
|
check_arg_id();
|
|
}
|
|
FMT_CONSTEXPR void on_arg_id(unsigned id) {
|
|
arg_id_ = id;
|
|
context_.check_arg_id(id);
|
|
check_arg_id();
|
|
}
|
|
FMT_CONSTEXPR void on_arg_id(basic_string_view<Char>) {}
|
|
|
|
FMT_CONSTEXPR void on_replacement_field(const Char *) {}
|
|
|
|
FMT_CONSTEXPR const Char *on_format_specs(iterator it) {
|
|
auto p = pointer_from(it);
|
|
context_.advance_to(p);
|
|
return to_unsigned(arg_id_) < NUM_ARGS ?
|
|
parse_funcs_[arg_id_](context_) : p;
|
|
}
|
|
|
|
FMT_CONSTEXPR void on_error(const char *message) {
|
|
context_.on_error(message);
|
|
}
|
|
|
|
private:
|
|
typedef basic_parse_context<Char, ErrorHandler> parse_context_type;
|
|
enum { NUM_ARGS = sizeof...(Args) };
|
|
|
|
FMT_CONSTEXPR void check_arg_id() {
|
|
if (internal::to_unsigned(arg_id_) >= NUM_ARGS)
|
|
context_.on_error("argument index out of range");
|
|
}
|
|
|
|
// Format specifier parsing function.
|
|
typedef const Char *(*parse_func)(parse_context_type &);
|
|
|
|
int arg_id_;
|
|
parse_context_type context_;
|
|
parse_func parse_funcs_[NUM_ARGS > 0 ? NUM_ARGS : 1];
|
|
};
|
|
|
|
template <typename Char, typename ErrorHandler, typename... Args>
|
|
FMT_CONSTEXPR bool check_format_string(
|
|
basic_string_view<Char> s, ErrorHandler eh = ErrorHandler()) {
|
|
format_string_checker<Char, ErrorHandler, Args...> checker(s, eh);
|
|
parse_format_string<true>(s, checker);
|
|
return true;
|
|
}
|
|
|
|
template <typename... Args, typename String>
|
|
typename std::enable_if<is_compile_string<String>::value>::type
|
|
check_format_string(String format_str) {
|
|
FMT_CONSTEXPR_DECL bool invalid_format =
|
|
internal::check_format_string<char, internal::error_handler, Args...>(
|
|
string_view(format_str.data(), format_str.size()));
|
|
(void)invalid_format;
|
|
}
|
|
|
|
// Specifies whether to format T using the standard formatter.
|
|
// It is not possible to use get_type in formatter specialization directly
|
|
// because of a bug in MSVC.
|
|
template <typename Context, typename T>
|
|
struct format_type :
|
|
std::integral_constant<bool, get_type<Context, T>::value != custom_type> {};
|
|
|
|
template <template <typename> class Handler, typename Spec, typename Context>
|
|
void handle_dynamic_spec(
|
|
Spec &value, arg_ref<typename Context::char_type> ref, Context &ctx) {
|
|
typedef typename Context::char_type char_type;
|
|
switch (ref.kind) {
|
|
case arg_ref<char_type>::NONE:
|
|
break;
|
|
case arg_ref<char_type>::INDEX:
|
|
internal::set_dynamic_spec<Handler>(
|
|
value, ctx.get_arg(ref.index), ctx.error_handler());
|
|
break;
|
|
case arg_ref<char_type>::NAME:
|
|
internal::set_dynamic_spec<Handler>(
|
|
value, ctx.get_arg(ref.name), ctx.error_handler());
|
|
break;
|
|
}
|
|
}
|
|
} // namespace internal
|
|
|
|
/** The default argument formatter. */
|
|
template <typename Range>
|
|
class arg_formatter:
|
|
public internal::function<
|
|
typename internal::arg_formatter_base<Range>::iterator>,
|
|
public internal::arg_formatter_base<Range> {
|
|
private:
|
|
typedef typename Range::value_type char_type;
|
|
typedef internal::arg_formatter_base<Range> base;
|
|
typedef basic_format_context<typename base::iterator, char_type> context_type;
|
|
|
|
context_type &ctx_;
|
|
|
|
public:
|
|
typedef Range range;
|
|
typedef typename base::iterator iterator;
|
|
typedef typename base::format_specs format_specs;
|
|
|
|
/**
|
|
\rst
|
|
Constructs an argument formatter object.
|
|
*ctx* is a reference to the formatting context,
|
|
*spec* contains format specifier information for standard argument types.
|
|
\endrst
|
|
*/
|
|
explicit arg_formatter(context_type &ctx, format_specs *spec = {})
|
|
: base(Range(ctx.out()), spec), ctx_(ctx) {}
|
|
|
|
// Deprecated.
|
|
arg_formatter(context_type &ctx, format_specs &spec)
|
|
: base(Range(ctx.out()), &spec), ctx_(ctx) {}
|
|
|
|
using base::operator();
|
|
|
|
/** Formats an argument of a user-defined type. */
|
|
iterator operator()(typename basic_format_arg<context_type>::handle handle) {
|
|
handle.format(ctx_);
|
|
return this->out();
|
|
}
|
|
};
|
|
|
|
/**
|
|
An error returned by an operating system or a language runtime,
|
|
for example a file opening error.
|
|
*/
|
|
class system_error : public std::runtime_error {
|
|
private:
|
|
FMT_API void init(int err_code, string_view format_str, format_args args);
|
|
|
|
protected:
|
|
int error_code_;
|
|
|
|
system_error() : std::runtime_error("") {}
|
|
|
|
public:
|
|
/**
|
|
\rst
|
|
Constructs a :class:`fmt::system_error` object with a description
|
|
formatted with `fmt::format_system_error`. *message* and additional
|
|
arguments passed into the constructor are formatted similarly to
|
|
`fmt::format`.
|
|
|
|
**Example**::
|
|
|
|
// This throws a system_error with the description
|
|
// cannot open file 'madeup': No such file or directory
|
|
// or similar (system message may vary).
|
|
const char *filename = "madeup";
|
|
std::FILE *file = std::fopen(filename, "r");
|
|
if (!file)
|
|
throw fmt::system_error(errno, "cannot open file '{}'", filename);
|
|
\endrst
|
|
*/
|
|
template <typename... Args>
|
|
system_error(int error_code, string_view message, const Args &... args)
|
|
: std::runtime_error("") {
|
|
init(error_code, message, make_format_args(args...));
|
|
}
|
|
|
|
int error_code() const { return error_code_; }
|
|
};
|
|
|
|
/**
|
|
\rst
|
|
Formats an error returned by an operating system or a language runtime,
|
|
for example a file opening error, and writes it to *out* in the following
|
|
form:
|
|
|
|
.. parsed-literal::
|
|
*<message>*: *<system-message>*
|
|
|
|
where *<message>* is the passed message and *<system-message>* is
|
|
the system message corresponding to the error code.
|
|
*error_code* is a system error code as given by ``errno``.
|
|
If *error_code* is not a valid error code such as -1, the system message
|
|
may look like "Unknown error -1" and is platform-dependent.
|
|
\endrst
|
|
*/
|
|
FMT_API void format_system_error(internal::buffer &out, int error_code,
|
|
fmt::string_view message) FMT_NOEXCEPT;
|
|
|
|
/**
|
|
This template provides operations for formatting and writing data into a
|
|
character range.
|
|
*/
|
|
template <typename Range>
|
|
class basic_writer {
|
|
public:
|
|
typedef typename Range::value_type char_type;
|
|
typedef decltype(internal::declval<Range>().begin()) iterator;
|
|
typedef basic_format_specs<char_type> format_specs;
|
|
|
|
private:
|
|
iterator out_; // Output iterator.
|
|
std::unique_ptr<locale_provider> locale_;
|
|
|
|
iterator out() const { return out_; }
|
|
|
|
// Attempts to reserve space for n extra characters in the output range.
|
|
// Returns a pointer to the reserved range or a reference to out_.
|
|
auto reserve(std::size_t n) -> decltype(internal::reserve(out_, n)) {
|
|
return internal::reserve(out_, n);
|
|
}
|
|
|
|
// Writes a value in the format
|
|
// <left-padding><value><right-padding>
|
|
// where <value> is written by f(it).
|
|
template <typename F>
|
|
void write_padded(std::size_t size, const align_spec &spec, F &&f);
|
|
|
|
template <typename F>
|
|
struct padded_int_writer {
|
|
size_t size_;
|
|
string_view prefix;
|
|
char_type fill;
|
|
std::size_t padding;
|
|
F f;
|
|
|
|
size_t size() const { return size_; }
|
|
|
|
template <typename It>
|
|
void operator()(It &&it) const {
|
|
if (prefix.size() != 0)
|
|
it = internal::copy_str<char_type>(prefix.begin(), prefix.end(), it);
|
|
it = std::fill_n(it, padding, fill);
|
|
f(it);
|
|
}
|
|
};
|
|
|
|
// Writes an integer in the format
|
|
// <left-padding><prefix><numeric-padding><digits><right-padding>
|
|
// where <digits> are written by f(it).
|
|
template <typename Spec, typename F>
|
|
void write_int(unsigned num_digits, string_view prefix,
|
|
const Spec &spec, F f) {
|
|
std::size_t size = prefix.size() + num_digits;
|
|
char_type fill = static_cast<char_type>(spec.fill());
|
|
std::size_t padding = 0;
|
|
if (spec.align() == ALIGN_NUMERIC) {
|
|
if (spec.width() > size) {
|
|
padding = spec.width() - size;
|
|
size = spec.width();
|
|
}
|
|
} else if (spec.precision() > static_cast<int>(num_digits)) {
|
|
size = prefix.size() + static_cast<std::size_t>(spec.precision());
|
|
padding = static_cast<std::size_t>(spec.precision()) - num_digits;
|
|
fill = static_cast<char_type>('0');
|
|
}
|
|
align_spec as = spec;
|
|
if (spec.align() == ALIGN_DEFAULT)
|
|
as.align_ = ALIGN_RIGHT;
|
|
write_padded(size, as, padded_int_writer<F>{size, prefix, fill, padding, f});
|
|
}
|
|
|
|
// Writes a decimal integer.
|
|
template <typename Int>
|
|
void write_decimal(Int value) {
|
|
typedef typename internal::int_traits<Int>::main_type main_type;
|
|
main_type abs_value = static_cast<main_type>(value);
|
|
bool is_negative = internal::is_negative(value);
|
|
if (is_negative)
|
|
abs_value = 0 - abs_value;
|
|
unsigned num_digits = internal::count_digits(abs_value);
|
|
auto &&it = reserve((is_negative ? 1 : 0) + num_digits);
|
|
if (is_negative)
|
|
*it++ = static_cast<char_type>('-');
|
|
it = internal::format_decimal<char_type>(it, abs_value, num_digits);
|
|
}
|
|
|
|
// The handle_int_type_spec handler that writes an integer.
|
|
template <typename Int, typename Spec>
|
|
struct int_writer {
|
|
typedef typename internal::int_traits<Int>::main_type unsigned_type;
|
|
|
|
basic_writer<Range> &writer;
|
|
const Spec &spec;
|
|
unsigned_type abs_value;
|
|
char prefix[4];
|
|
unsigned prefix_size;
|
|
|
|
string_view get_prefix() const { return string_view(prefix, prefix_size); }
|
|
|
|
// Counts the number of digits in abs_value. BITS = log2(radix).
|
|
template <unsigned BITS>
|
|
unsigned count_digits() const {
|
|
unsigned_type n = abs_value;
|
|
unsigned num_digits = 0;
|
|
do {
|
|
++num_digits;
|
|
} while ((n >>= BITS) != 0);
|
|
return num_digits;
|
|
}
|
|
|
|
int_writer(basic_writer<Range> &w, Int value, const Spec &s)
|
|
: writer(w), spec(s), abs_value(static_cast<unsigned_type>(value)),
|
|
prefix_size(0) {
|
|
if (internal::is_negative(value)) {
|
|
prefix[0] = '-';
|
|
++prefix_size;
|
|
abs_value = 0 - abs_value;
|
|
} else if (spec.flag(SIGN_FLAG)) {
|
|
prefix[0] = spec.flag(PLUS_FLAG) ? '+' : ' ';
|
|
++prefix_size;
|
|
}
|
|
}
|
|
|
|
struct dec_writer {
|
|
unsigned_type abs_value;
|
|
unsigned num_digits;
|
|
|
|
template <typename It>
|
|
void operator()(It &&it) const {
|
|
it = internal::format_decimal<char_type>(it, abs_value, num_digits);
|
|
}
|
|
};
|
|
|
|
void on_dec() {
|
|
unsigned num_digits = internal::count_digits(abs_value);
|
|
writer.write_int(num_digits, get_prefix(), spec,
|
|
dec_writer{abs_value, num_digits});
|
|
}
|
|
|
|
struct hex_writer {
|
|
int_writer &self;
|
|
unsigned num_digits;
|
|
|
|
template <typename It>
|
|
void operator()(It &&it) const {
|
|
it = internal::format_uint<4, char_type>(
|
|
it, self.abs_value, num_digits, self.spec.type() != 'x');
|
|
}
|
|
};
|
|
|
|
void on_hex() {
|
|
if (spec.flag(HASH_FLAG)) {
|
|
prefix[prefix_size++] = '0';
|
|
prefix[prefix_size++] = static_cast<char>(spec.type());
|
|
}
|
|
unsigned num_digits = count_digits<4>();
|
|
writer.write_int(num_digits, get_prefix(), spec,
|
|
hex_writer{*this, num_digits});
|
|
}
|
|
|
|
template <int BITS>
|
|
struct bin_writer {
|
|
unsigned_type abs_value;
|
|
unsigned num_digits;
|
|
|
|
template <typename It>
|
|
void operator()(It &&it) const {
|
|
it = internal::format_uint<BITS, char_type>(it, abs_value, num_digits);
|
|
}
|
|
};
|
|
|
|
void on_bin() {
|
|
if (spec.flag(HASH_FLAG)) {
|
|
prefix[prefix_size++] = '0';
|
|
prefix[prefix_size++] = static_cast<char>(spec.type());
|
|
}
|
|
unsigned num_digits = count_digits<1>();
|
|
writer.write_int(num_digits, get_prefix(), spec,
|
|
bin_writer<1>{abs_value, num_digits});
|
|
}
|
|
|
|
void on_oct() {
|
|
unsigned num_digits = count_digits<3>();
|
|
if (spec.flag(HASH_FLAG) &&
|
|
spec.precision() <= static_cast<int>(num_digits)) {
|
|
// Octal prefix '0' is counted as a digit, so only add it if precision
|
|
// is not greater than the number of digits.
|
|
prefix[prefix_size++] = '0';
|
|
}
|
|
writer.write_int(num_digits, get_prefix(), spec,
|
|
bin_writer<3>{abs_value, num_digits});
|
|
}
|
|
|
|
enum { SEP_SIZE = 1 };
|
|
|
|
struct num_writer {
|
|
unsigned_type abs_value;
|
|
unsigned size;
|
|
char_type sep;
|
|
|
|
template <typename It>
|
|
void operator()(It &&it) const {
|
|
basic_string_view<char_type> s(&sep, SEP_SIZE);
|
|
it = internal::format_decimal<char_type>(
|
|
it, abs_value, size, internal::add_thousands_sep<char_type>(s));
|
|
}
|
|
};
|
|
|
|
void on_num() {
|
|
unsigned num_digits = internal::count_digits(abs_value);
|
|
char_type sep = internal::thousands_sep<char_type>(writer.locale_.get());
|
|
unsigned size = num_digits + SEP_SIZE * ((num_digits - 1) / 3);
|
|
writer.write_int(size, get_prefix(), spec,
|
|
num_writer{abs_value, size, sep});
|
|
}
|
|
|
|
void on_error() {
|
|
FMT_THROW(format_error("invalid type specifier"));
|
|
}
|
|
};
|
|
|
|
// Writes a formatted integer.
|
|
template <typename T, typename Spec>
|
|
void write_int(T value, const Spec &spec) {
|
|
internal::handle_int_type_spec(spec.type(),
|
|
int_writer<T, Spec>(*this, value, spec));
|
|
}
|
|
|
|
enum {INF_SIZE = 3}; // This is an enum to workaround a bug in MSVC.
|
|
|
|
struct inf_or_nan_writer {
|
|
char sign;
|
|
const char *str;
|
|
|
|
size_t size() const { return static_cast<std::size_t>(INF_SIZE); }
|
|
|
|
template <typename It>
|
|
void operator()(It &&it) const {
|
|
if (sign)
|
|
*it++ = static_cast<char_type>(sign);
|
|
it = internal::copy_str<char_type>(
|
|
str, str + static_cast<std::size_t>(INF_SIZE), it);
|
|
}
|
|
};
|
|
|
|
struct double_writer {
|
|
size_t n;
|
|
char sign;
|
|
internal::buffer &buffer;
|
|
|
|
size_t size() const { return buffer.size() + (sign ? 1 : 0); }
|
|
|
|
template <typename It>
|
|
void operator()(It &&it) {
|
|
if (sign) {
|
|
*it++ = static_cast<char_type>(sign);
|
|
--n;
|
|
}
|
|
it = internal::copy_str<char_type>(buffer.begin(), buffer.end(), it);
|
|
}
|
|
};
|
|
|
|
// Formats a floating-point number (double or long double).
|
|
template <typename T>
|
|
void write_double(T value, const format_specs &spec);
|
|
template <typename T>
|
|
void write_double_sprintf(T value, const format_specs &spec,
|
|
internal::buffer &buffer);
|
|
|
|
template <typename Char>
|
|
struct str_writer {
|
|
const Char *s;
|
|
size_t size_;
|
|
|
|
size_t size() const {
|
|
return internal::count_code_points(basic_string_view<Char>(s, size_));
|
|
}
|
|
|
|
template <typename It>
|
|
void operator()(It &&it) const {
|
|
it = internal::copy_str<char_type>(s, s + size_, it);
|
|
}
|
|
};
|
|
|
|
// Writes a formatted string.
|
|
template <typename Char>
|
|
void write_str(const Char *s, std::size_t size, const align_spec &spec) {
|
|
write_padded(size, spec, str_writer<Char>{s, size});
|
|
}
|
|
|
|
template <typename Char>
|
|
void write_str(basic_string_view<Char> str, const format_specs &spec);
|
|
|
|
template <typename Char>
|
|
friend class internal::arg_formatter_base;
|
|
|
|
public:
|
|
/** Constructs a ``basic_writer`` object. */
|
|
explicit basic_writer(Range out): out_(out.begin()) {}
|
|
|
|
void write(int value) { write_decimal(value); }
|
|
void write(long value) { write_decimal(value); }
|
|
void write(long long value) { write_decimal(value); }
|
|
|
|
void write(unsigned value) { write_decimal(value); }
|
|
void write(unsigned long value) { write_decimal(value); }
|
|
void write(unsigned long long value) { write_decimal(value); }
|
|
|
|
/**
|
|
\rst
|
|
Formats *value* and writes it to the buffer.
|
|
\endrst
|
|
*/
|
|
template <typename T, typename FormatSpec, typename... FormatSpecs>
|
|
typename std::enable_if<std::is_integral<T>::value, void>::type
|
|
write(T value, FormatSpec spec, FormatSpecs... specs) {
|
|
format_specs s(spec, specs...);
|
|
s.align_ = ALIGN_RIGHT;
|
|
write_int(value, s);
|
|
}
|
|
|
|
void write(double value) {
|
|
write_double(value, format_specs());
|
|
}
|
|
|
|
/**
|
|
\rst
|
|
Formats *value* using the general format for floating-point numbers
|
|
(``'g'``) and writes it to the buffer.
|
|
\endrst
|
|
*/
|
|
void write(long double value) {
|
|
write_double(value, format_specs());
|
|
}
|
|
|
|
/** Writes a character to the buffer. */
|
|
void write(char value) {
|
|
*reserve(1) = value;
|
|
}
|
|
void write(wchar_t value) {
|
|
static_assert(std::is_same<char_type, wchar_t>::value, "");
|
|
*reserve(1) = value;
|
|
}
|
|
|
|
/**
|
|
\rst
|
|
Writes *value* to the buffer.
|
|
\endrst
|
|
*/
|
|
void write(string_view value) {
|
|
auto &&it = reserve(value.size());
|
|
it = internal::copy_str<char_type>(value.begin(), value.end(), it);
|
|
}
|
|
void write(wstring_view value) {
|
|
static_assert(std::is_same<char_type, wchar_t>::value, "");
|
|
auto &&it = reserve(value.size());
|
|
it = std::copy(value.begin(), value.end(), it);
|
|
}
|
|
|
|
template <typename... FormatSpecs>
|
|
void write(basic_string_view<char_type> str, FormatSpecs... specs) {
|
|
write_str(str, format_specs(specs...));
|
|
}
|
|
|
|
template <typename T>
|
|
typename std::enable_if<std::is_same<T, void>::value>::type
|
|
write(const T *p) {
|
|
format_specs specs;
|
|
specs.flags_ = HASH_FLAG;
|
|
specs.type_ = 'x';
|
|
write_int(reinterpret_cast<uintptr_t>(p), specs);
|
|
}
|
|
};
|
|
|
|
template <typename Range>
|
|
template <typename F>
|
|
void basic_writer<Range>::write_padded(
|
|
std::size_t size, const align_spec &spec, F &&f) {
|
|
unsigned width = spec.width();
|
|
size_t num_code_points = width != 0 ? f.size() : size;
|
|
if (width <= num_code_points)
|
|
return f(reserve(size));
|
|
auto &&it = reserve(width + (size - num_code_points));
|
|
char_type fill = static_cast<char_type>(spec.fill());
|
|
std::size_t padding = width - num_code_points;
|
|
if (spec.align() == ALIGN_RIGHT) {
|
|
it = std::fill_n(it, padding, fill);
|
|
f(it);
|
|
} else if (spec.align() == ALIGN_CENTER) {
|
|
std::size_t left_padding = padding / 2;
|
|
it = std::fill_n(it, left_padding, fill);
|
|
f(it);
|
|
it = std::fill_n(it, padding - left_padding, fill);
|
|
} else {
|
|
f(it);
|
|
it = std::fill_n(it, padding, fill);
|
|
}
|
|
}
|
|
|
|
template <typename Range>
|
|
template <typename Char>
|
|
void basic_writer<Range>::write_str(
|
|
basic_string_view<Char> s, const format_specs &spec) {
|
|
const Char *data = s.data();
|
|
std::size_t size = s.size();
|
|
std::size_t precision = static_cast<std::size_t>(spec.precision_);
|
|
if (spec.precision_ >= 0 && precision < size)
|
|
size = precision;
|
|
write_str(data, size, spec);
|
|
}
|
|
|
|
struct float_spec_handler {
|
|
char type;
|
|
bool upper;
|
|
|
|
explicit float_spec_handler(char t) : type(t), upper(false) {}
|
|
|
|
void on_general() {
|
|
if (type == 'G')
|
|
upper = true;
|
|
else
|
|
type = 'g';
|
|
}
|
|
|
|
void on_exp() {
|
|
if (type == 'E')
|
|
upper = true;
|
|
}
|
|
|
|
void on_fixed() {
|
|
if (type == 'F') {
|
|
upper = true;
|
|
#if FMT_MSC_VER
|
|
// MSVC's printf doesn't support 'F'.
|
|
type = 'f';
|
|
#endif
|
|
}
|
|
}
|
|
|
|
void on_hex() {
|
|
if (type == 'A')
|
|
upper = true;
|
|
}
|
|
|
|
void on_error() {
|
|
FMT_THROW(format_error("invalid type specifier"));
|
|
}
|
|
};
|
|
|
|
template <typename Range>
|
|
template <typename T>
|
|
void basic_writer<Range>::write_double(T value, const format_specs &spec) {
|
|
// Check type.
|
|
float_spec_handler handler(static_cast<char>(spec.type()));
|
|
internal::handle_float_type_spec(handler.type, handler);
|
|
|
|
char sign = 0;
|
|
// Use isnegative instead of value < 0 because the latter is always
|
|
// false for NaN.
|
|
if (internal::fputil::isnegative(static_cast<double>(value))) {
|
|
sign = '-';
|
|
value = -value;
|
|
} else if (spec.flag(SIGN_FLAG)) {
|
|
sign = spec.flag(PLUS_FLAG) ? '+' : ' ';
|
|
}
|
|
|
|
struct write_inf_or_nan_t {
|
|
basic_writer &writer;
|
|
format_specs spec;
|
|
char sign;
|
|
void operator()(const char *str) const {
|
|
writer.write_padded(INF_SIZE + (sign ? 1 : 0), spec,
|
|
inf_or_nan_writer{sign, str});
|
|
}
|
|
} write_inf_or_nan = {*this, spec, sign};
|
|
|
|
// Format NaN and ininity ourselves because sprintf's output is not consistent
|
|
// across platforms.
|
|
if (internal::fputil::isnotanumber(value))
|
|
return write_inf_or_nan(handler.upper ? "NAN" : "nan");
|
|
if (internal::fputil::isinfinity(value))
|
|
return write_inf_or_nan(handler.upper ? "INF" : "inf");
|
|
|
|
memory_buffer buffer;
|
|
char type = static_cast<char>(spec.type());
|
|
if (internal::const_check(
|
|
internal::use_grisu() && sizeof(T) <= sizeof(double)) &&
|
|
type != 'a' && type != 'A') {
|
|
char buf[100]; // TODO: correct buffer size
|
|
size_t size = 0;
|
|
internal::grisu2_format(static_cast<double>(value), buf, size, type,
|
|
spec.precision(), spec.flag(HASH_FLAG));
|
|
FMT_ASSERT(size <= 100, "buffer overflow");
|
|
buffer.append(buf, buf + size); // TODO: avoid extra copy
|
|
} else {
|
|
format_specs normalized_spec(spec);
|
|
normalized_spec.type_ = handler.type;
|
|
write_double_sprintf(value, normalized_spec, buffer);
|
|
}
|
|
size_t n = buffer.size();
|
|
align_spec as = spec;
|
|
if (spec.align() == ALIGN_NUMERIC) {
|
|
if (sign) {
|
|
auto &&it = reserve(1);
|
|
*it++ = static_cast<char_type>(sign);
|
|
sign = 0;
|
|
if (as.width_)
|
|
--as.width_;
|
|
}
|
|
as.align_ = ALIGN_RIGHT;
|
|
} else {
|
|
if (spec.align() == ALIGN_DEFAULT)
|
|
as.align_ = ALIGN_RIGHT;
|
|
if (sign)
|
|
++n;
|
|
}
|
|
write_padded(n, as, double_writer{n, sign, buffer});
|
|
}
|
|
|
|
template <typename Range>
|
|
template <typename T>
|
|
void basic_writer<Range>::write_double_sprintf(
|
|
T value, const format_specs &spec, internal::buffer &buffer) {
|
|
// Buffer capacity must be non-zero, otherwise MSVC's vsnprintf_s will fail.
|
|
FMT_ASSERT(buffer.capacity() != 0, "empty buffer");
|
|
|
|
// Build format string.
|
|
enum { MAX_FORMAT_SIZE = 10}; // longest format: %#-*.*Lg
|
|
char format[MAX_FORMAT_SIZE];
|
|
char *format_ptr = format;
|
|
*format_ptr++ = '%';
|
|
if (spec.flag(HASH_FLAG))
|
|
*format_ptr++ = '#';
|
|
if (spec.precision() >= 0) {
|
|
*format_ptr++ = '.';
|
|
*format_ptr++ = '*';
|
|
}
|
|
if (std::is_same<T, long double>::value)
|
|
*format_ptr++ = 'L';
|
|
*format_ptr++ = spec.type();
|
|
*format_ptr = '\0';
|
|
|
|
// Format using snprintf.
|
|
char *start = FMT_NULL;
|
|
for (;;) {
|
|
std::size_t buffer_size = buffer.capacity();
|
|
start = &buffer[0];
|
|
int result = internal::char_traits<char>::format_float(
|
|
start, buffer_size, format, spec.precision(), value);
|
|
if (result >= 0) {
|
|
unsigned n = internal::to_unsigned(result);
|
|
if (n < buffer.capacity()) {
|
|
buffer.resize(n);
|
|
break; // The buffer is large enough - continue with formatting.
|
|
}
|
|
buffer.reserve(n + 1);
|
|
} else {
|
|
// If result is negative we ask to increase the capacity by at least 1,
|
|
// but as std::vector, the buffer grows exponentially.
|
|
buffer.reserve(buffer.capacity() + 1);
|
|
}
|
|
}
|
|
}
|
|
|
|
// Reports a system error without throwing an exception.
|
|
// Can be used to report errors from destructors.
|
|
FMT_API void report_system_error(int error_code,
|
|
string_view message) FMT_NOEXCEPT;
|
|
|
|
#if FMT_USE_WINDOWS_H
|
|
|
|
/** A Windows error. */
|
|
class windows_error : public system_error {
|
|
private:
|
|
FMT_API void init(int error_code, string_view format_str, format_args args);
|
|
|
|
public:
|
|
/**
|
|
\rst
|
|
Constructs a :class:`fmt::windows_error` object with the description
|
|
of the form
|
|
|
|
.. parsed-literal::
|
|
*<message>*: *<system-message>*
|
|
|
|
where *<message>* is the formatted message and *<system-message>* is the
|
|
system message corresponding to the error code.
|
|
*error_code* is a Windows error code as given by ``GetLastError``.
|
|
If *error_code* is not a valid error code such as -1, the system message
|
|
will look like "error -1".
|
|
|
|
**Example**::
|
|
|
|
// This throws a windows_error with the description
|
|
// cannot open file 'madeup': The system cannot find the file specified.
|
|
// or similar (system message may vary).
|
|
const char *filename = "madeup";
|
|
LPOFSTRUCT of = LPOFSTRUCT();
|
|
HFILE file = OpenFile(filename, &of, OF_READ);
|
|
if (file == HFILE_ERROR) {
|
|
throw fmt::windows_error(GetLastError(),
|
|
"cannot open file '{}'", filename);
|
|
}
|
|
\endrst
|
|
*/
|
|
template <typename... Args>
|
|
windows_error(int error_code, string_view message, const Args &... args) {
|
|
init(error_code, message, make_format_args(args...));
|
|
}
|
|
};
|
|
|
|
// Reports a Windows error without throwing an exception.
|
|
// Can be used to report errors from destructors.
|
|
FMT_API void report_windows_error(int error_code,
|
|
string_view message) FMT_NOEXCEPT;
|
|
|
|
#endif
|
|
|
|
/** Fast integer formatter. */
|
|
class format_int {
|
|
private:
|
|
// Buffer should be large enough to hold all digits (digits10 + 1),
|
|
// a sign and a null character.
|
|
enum {BUFFER_SIZE = std::numeric_limits<unsigned long long>::digits10 + 3};
|
|
mutable char buffer_[BUFFER_SIZE];
|
|
char *str_;
|
|
|
|
// Formats value in reverse and returns a pointer to the beginning.
|
|
char *format_decimal(unsigned long long value) {
|
|
char *ptr = buffer_ + BUFFER_SIZE - 1;
|
|
while (value >= 100) {
|
|
// Integer division is slow so do it for a group of two digits instead
|
|
// of for every digit. The idea comes from the talk by Alexandrescu
|
|
// "Three Optimization Tips for C++". See speed-test for a comparison.
|
|
unsigned index = static_cast<unsigned>((value % 100) * 2);
|
|
value /= 100;
|
|
*--ptr = internal::data::DIGITS[index + 1];
|
|
*--ptr = internal::data::DIGITS[index];
|
|
}
|
|
if (value < 10) {
|
|
*--ptr = static_cast<char>('0' + value);
|
|
return ptr;
|
|
}
|
|
unsigned index = static_cast<unsigned>(value * 2);
|
|
*--ptr = internal::data::DIGITS[index + 1];
|
|
*--ptr = internal::data::DIGITS[index];
|
|
return ptr;
|
|
}
|
|
|
|
void format_signed(long long value) {
|
|
unsigned long long abs_value = static_cast<unsigned long long>(value);
|
|
bool negative = value < 0;
|
|
if (negative)
|
|
abs_value = 0 - abs_value;
|
|
str_ = format_decimal(abs_value);
|
|
if (negative)
|
|
*--str_ = '-';
|
|
}
|
|
|
|
public:
|
|
explicit format_int(int value) { format_signed(value); }
|
|
explicit format_int(long value) { format_signed(value); }
|
|
explicit format_int(long long value) { format_signed(value); }
|
|
explicit format_int(unsigned value) : str_(format_decimal(value)) {}
|
|
explicit format_int(unsigned long value) : str_(format_decimal(value)) {}
|
|
explicit format_int(unsigned long long value) : str_(format_decimal(value)) {}
|
|
|
|
/** Returns the number of characters written to the output buffer. */
|
|
std::size_t size() const {
|
|
return internal::to_unsigned(buffer_ - str_ + BUFFER_SIZE - 1);
|
|
}
|
|
|
|
/**
|
|
Returns a pointer to the output buffer content. No terminating null
|
|
character is appended.
|
|
*/
|
|
const char *data() const { return str_; }
|
|
|
|
/**
|
|
Returns a pointer to the output buffer content with terminating null
|
|
character appended.
|
|
*/
|
|
const char *c_str() const {
|
|
buffer_[BUFFER_SIZE - 1] = '\0';
|
|
return str_;
|
|
}
|
|
|
|
/**
|
|
\rst
|
|
Returns the content of the output buffer as an ``std::string``.
|
|
\endrst
|
|
*/
|
|
std::string str() const { return std::string(str_, size()); }
|
|
};
|
|
|
|
// Formats a decimal integer value writing into buffer and returns
|
|
// a pointer to the end of the formatted string. This function doesn't
|
|
// write a terminating null character.
|
|
template <typename T>
|
|
inline void format_decimal(char *&buffer, T value) {
|
|
typedef typename internal::int_traits<T>::main_type main_type;
|
|
main_type abs_value = static_cast<main_type>(value);
|
|
if (internal::is_negative(value)) {
|
|
*buffer++ = '-';
|
|
abs_value = 0 - abs_value;
|
|
}
|
|
if (abs_value < 100) {
|
|
if (abs_value < 10) {
|
|
*buffer++ = static_cast<char>('0' + abs_value);
|
|
return;
|
|
}
|
|
unsigned index = static_cast<unsigned>(abs_value * 2);
|
|
*buffer++ = internal::data::DIGITS[index];
|
|
*buffer++ = internal::data::DIGITS[index + 1];
|
|
return;
|
|
}
|
|
unsigned num_digits = internal::count_digits(abs_value);
|
|
internal::format_decimal<char>(buffer, abs_value, num_digits);
|
|
buffer += num_digits;
|
|
}
|
|
|
|
// Formatter of objects of type T.
|
|
template <typename T, typename Char>
|
|
struct formatter<
|
|
T, Char,
|
|
typename std::enable_if<internal::format_type<
|
|
typename buffer_context<Char>::type, T>::value>::type> {
|
|
|
|
// Parses format specifiers stopping either at the end of the range or at the
|
|
// terminating '}'.
|
|
template <typename ParseContext>
|
|
FMT_CONSTEXPR typename ParseContext::iterator parse(ParseContext &ctx) {
|
|
auto it = internal::null_terminating_iterator<Char>(ctx);
|
|
typedef internal::dynamic_specs_handler<ParseContext> handler_type;
|
|
auto type = internal::get_type<
|
|
typename buffer_context<Char>::type, T>::value;
|
|
internal::specs_checker<handler_type>
|
|
handler(handler_type(specs_, ctx), type);
|
|
it = parse_format_specs(it, handler);
|
|
auto type_spec = specs_.type();
|
|
auto eh = ctx.error_handler();
|
|
switch (type) {
|
|
case internal::none_type:
|
|
case internal::named_arg_type:
|
|
FMT_ASSERT(false, "invalid argument type");
|
|
break;
|
|
case internal::int_type:
|
|
case internal::uint_type:
|
|
case internal::long_long_type:
|
|
case internal::ulong_long_type:
|
|
case internal::bool_type:
|
|
handle_int_type_spec(
|
|
type_spec, internal::int_type_checker<decltype(eh)>(eh));
|
|
break;
|
|
case internal::char_type:
|
|
handle_char_specs(
|
|
&specs_,
|
|
internal::char_specs_checker<decltype(eh)>(type_spec, eh));
|
|
break;
|
|
case internal::double_type:
|
|
case internal::long_double_type:
|
|
handle_float_type_spec(
|
|
type_spec, internal::float_type_checker<decltype(eh)>(eh));
|
|
break;
|
|
case internal::cstring_type:
|
|
internal::handle_cstring_type_spec(
|
|
type_spec, internal::cstring_type_checker<decltype(eh)>(eh));
|
|
break;
|
|
case internal::string_type:
|
|
internal::check_string_type_spec(type_spec, eh);
|
|
break;
|
|
case internal::pointer_type:
|
|
internal::check_pointer_type_spec(type_spec, eh);
|
|
break;
|
|
case internal::custom_type:
|
|
// Custom format specifiers should be checked in parse functions of
|
|
// formatter specializations.
|
|
break;
|
|
}
|
|
return pointer_from(it);
|
|
}
|
|
|
|
template <typename FormatContext>
|
|
auto format(const T &val, FormatContext &ctx) -> decltype(ctx.out()) {
|
|
internal::handle_dynamic_spec<internal::width_checker>(
|
|
specs_.width_, specs_.width_ref, ctx);
|
|
internal::handle_dynamic_spec<internal::precision_checker>(
|
|
specs_.precision_, specs_.precision_ref, ctx);
|
|
typedef output_range<typename FormatContext::iterator,
|
|
typename FormatContext::char_type> range_type;
|
|
return visit_format_arg(arg_formatter<range_type>(ctx, &specs_),
|
|
internal::make_arg<FormatContext>(val));
|
|
}
|
|
|
|
private:
|
|
internal::dynamic_format_specs<Char> specs_;
|
|
};
|
|
|
|
// A formatter for types known only at run time such as variant alternatives.
|
|
//
|
|
// Usage:
|
|
// typedef std::variant<int, std::string> variant;
|
|
// template <>
|
|
// struct formatter<variant>: dynamic_formatter<> {
|
|
// void format(buffer &buf, const variant &v, context &ctx) {
|
|
// visit([&](const auto &val) { format(buf, val, ctx); }, v);
|
|
// }
|
|
// };
|
|
template <typename Char = char>
|
|
class dynamic_formatter {
|
|
private:
|
|
struct null_handler: internal::error_handler {
|
|
void on_align(alignment) {}
|
|
void on_plus() {}
|
|
void on_minus() {}
|
|
void on_space() {}
|
|
void on_hash() {}
|
|
};
|
|
|
|
public:
|
|
template <typename ParseContext>
|
|
auto parse(ParseContext &ctx) -> decltype(ctx.begin()) {
|
|
auto it = internal::null_terminating_iterator<Char>(ctx);
|
|
// Checks are deferred to formatting time when the argument type is known.
|
|
internal::dynamic_specs_handler<ParseContext> handler(specs_, ctx);
|
|
it = parse_format_specs(it, handler);
|
|
return pointer_from(it);
|
|
}
|
|
|
|
template <typename T, typename FormatContext>
|
|
auto format(const T &val, FormatContext &ctx) -> decltype(ctx.out()) {
|
|
handle_specs(ctx);
|
|
internal::specs_checker<null_handler>
|
|
checker(null_handler(), internal::get_type<FormatContext, T>::value);
|
|
checker.on_align(specs_.align());
|
|
if (specs_.flags_ == 0) {
|
|
// Do nothing.
|
|
} else if (specs_.flag(SIGN_FLAG)) {
|
|
if (specs_.flag(PLUS_FLAG))
|
|
checker.on_plus();
|
|
else
|
|
checker.on_space();
|
|
} else if (specs_.flag(MINUS_FLAG)) {
|
|
checker.on_minus();
|
|
} else if (specs_.flag(HASH_FLAG)) {
|
|
checker.on_hash();
|
|
}
|
|
if (specs_.precision_ != -1)
|
|
checker.end_precision();
|
|
typedef output_range<typename FormatContext::iterator,
|
|
typename FormatContext::char_type> range;
|
|
visit_format_arg(arg_formatter<range>(ctx, &specs_),
|
|
internal::make_arg<FormatContext>(val));
|
|
return ctx.out();
|
|
}
|
|
|
|
private:
|
|
template <typename Context>
|
|
void handle_specs(Context &ctx) {
|
|
internal::handle_dynamic_spec<internal::width_checker>(
|
|
specs_.width_, specs_.width_ref, ctx);
|
|
internal::handle_dynamic_spec<internal::precision_checker>(
|
|
specs_.precision_, specs_.precision_ref, ctx);
|
|
}
|
|
|
|
internal::dynamic_format_specs<Char> specs_;
|
|
};
|
|
|
|
template <typename Range, typename Char>
|
|
typename basic_format_context<Range, Char>::format_arg
|
|
basic_format_context<Range, Char>::get_arg(
|
|
basic_string_view<char_type> name) {
|
|
map_.init(this->args());
|
|
format_arg arg = map_.find(name);
|
|
if (arg.type() == internal::none_type)
|
|
this->on_error("argument not found");
|
|
return arg;
|
|
}
|
|
|
|
template <typename ArgFormatter, typename Char, typename Context>
|
|
struct format_handler : internal::error_handler {
|
|
typedef internal::null_terminating_iterator<Char> iterator;
|
|
typedef typename ArgFormatter::range range;
|
|
|
|
format_handler(range r, basic_string_view<Char> str,
|
|
basic_format_args<Context> format_args)
|
|
: context(r.begin(), str, format_args) {}
|
|
|
|
void on_text(const Char *begin, const Char *end) {
|
|
auto size = internal::to_unsigned(end - begin);
|
|
auto out = context.out();
|
|
auto &&it = internal::reserve(out, size);
|
|
it = std::copy_n(begin, size, it);
|
|
context.advance_to(out);
|
|
}
|
|
|
|
void on_arg_id() { arg = context.next_arg(); }
|
|
void on_arg_id(unsigned id) {
|
|
context.parse_context().check_arg_id(id);
|
|
arg = context.get_arg(id);
|
|
}
|
|
void on_arg_id(basic_string_view<Char> id) {
|
|
arg = context.get_arg(id);
|
|
}
|
|
|
|
void on_replacement_field(const Char *p) {
|
|
context.parse_context().advance_to(p);
|
|
internal::custom_formatter<Char, Context> f(context);
|
|
if (!visit_format_arg(f, arg))
|
|
context.advance_to(visit_format_arg(ArgFormatter(context), arg));
|
|
}
|
|
|
|
iterator on_format_specs(iterator it) {
|
|
auto &parse_ctx = context.parse_context();
|
|
parse_ctx.advance_to(pointer_from(it));
|
|
internal::custom_formatter<Char, Context> f(context);
|
|
if (visit_format_arg(f, arg))
|
|
return iterator(parse_ctx);
|
|
basic_format_specs<Char> specs;
|
|
using internal::specs_handler;
|
|
internal::specs_checker<specs_handler<Context>>
|
|
handler(specs_handler<Context>(specs, context), arg.type());
|
|
it = parse_format_specs(it, handler);
|
|
if (*it != '}')
|
|
on_error("missing '}' in format string");
|
|
parse_ctx.advance_to(pointer_from(it));
|
|
context.advance_to(visit_format_arg(ArgFormatter(context, &specs), arg));
|
|
return it;
|
|
}
|
|
|
|
Context context;
|
|
basic_format_arg<Context> arg;
|
|
};
|
|
|
|
/** Formats arguments and writes the output to the range. */
|
|
template <typename ArgFormatter, typename Char, typename Context>
|
|
typename Context::iterator vformat_to(typename ArgFormatter::range out,
|
|
basic_string_view<Char> format_str,
|
|
basic_format_args<Context> args) {
|
|
format_handler<ArgFormatter, Char, Context> h(out, format_str, args);
|
|
internal::parse_format_string<false>(format_str, h);
|
|
return h.context.out();
|
|
}
|
|
|
|
// Casts ``p`` to ``const void*`` for pointer formatting.
|
|
// Example:
|
|
// auto s = format("{}", ptr(p));
|
|
template <typename T>
|
|
inline const void *ptr(const T *p) { return p; }
|
|
|
|
template <typename It, typename Char>
|
|
struct arg_join {
|
|
It begin;
|
|
It end;
|
|
basic_string_view<Char> sep;
|
|
|
|
arg_join(It begin, It end, basic_string_view<Char> sep)
|
|
: begin(begin), end(end), sep(sep) {}
|
|
};
|
|
|
|
template <typename It, typename Char>
|
|
struct formatter<arg_join<It, Char>, Char>:
|
|
formatter<typename std::iterator_traits<It>::value_type, Char> {
|
|
template <typename FormatContext>
|
|
auto format(const arg_join<It, Char> &value, FormatContext &ctx)
|
|
-> decltype(ctx.out()) {
|
|
typedef formatter<typename std::iterator_traits<It>::value_type, Char> base;
|
|
auto it = value.begin;
|
|
auto out = ctx.out();
|
|
if (it != value.end) {
|
|
out = base::format(*it++, ctx);
|
|
while (it != value.end) {
|
|
out = std::copy(value.sep.begin(), value.sep.end(), out);
|
|
ctx.advance_to(out);
|
|
out = base::format(*it++, ctx);
|
|
}
|
|
}
|
|
return out;
|
|
}
|
|
};
|
|
|
|
template <typename It>
|
|
arg_join<It, char> join(It begin, It end, string_view sep) {
|
|
return arg_join<It, char>(begin, end, sep);
|
|
}
|
|
|
|
template <typename It>
|
|
arg_join<It, wchar_t> join(It begin, It end, wstring_view sep) {
|
|
return arg_join<It, wchar_t>(begin, end, sep);
|
|
}
|
|
|
|
// The following causes ICE in gcc 4.4.
|
|
#if FMT_USE_TRAILING_RETURN && (!FMT_GCC_VERSION || FMT_GCC_VERSION >= 405)
|
|
template <typename Range>
|
|
auto join(const Range &range, string_view sep)
|
|
-> arg_join<decltype(internal::begin(range)), char> {
|
|
return join(internal::begin(range), internal::end(range), sep);
|
|
}
|
|
|
|
template <typename Range>
|
|
auto join(const Range &range, wstring_view sep)
|
|
-> arg_join<decltype(internal::begin(range)), wchar_t> {
|
|
return join(internal::begin(range), internal::end(range), sep);
|
|
}
|
|
#endif
|
|
|
|
/**
|
|
\rst
|
|
Converts *value* to ``std::string`` using the default format for type *T*.
|
|
It doesn't support user-defined types with custom formatters.
|
|
|
|
**Example**::
|
|
|
|
#include <fmt/format.h>
|
|
|
|
std::string answer = fmt::to_string(42);
|
|
\endrst
|
|
*/
|
|
template <typename T>
|
|
std::string to_string(const T &value) {
|
|
std::string str;
|
|
internal::container_buffer<std::string> buf(str);
|
|
writer(buf).write(value);
|
|
return str;
|
|
}
|
|
|
|
/**
|
|
Converts *value* to ``std::wstring`` using the default format for type *T*.
|
|
*/
|
|
template <typename T>
|
|
std::wstring to_wstring(const T &value) {
|
|
std::wstring str;
|
|
internal::container_buffer<std::wstring> buf(str);
|
|
wwriter(buf).write(value);
|
|
return str;
|
|
}
|
|
|
|
template <typename Char, std::size_t SIZE>
|
|
std::basic_string<Char> to_string(const basic_memory_buffer<Char, SIZE> &buf) {
|
|
return std::basic_string<Char>(buf.data(), buf.size());
|
|
}
|
|
|
|
template <typename String, typename Char = FMT_CHAR(String)>
|
|
inline typename buffer_context<FMT_CHAR(String)>::type::iterator vformat_to(
|
|
internal::basic_buffer<Char> &buf, const String &format_str,
|
|
basic_format_args<typename buffer_context<Char>::type> args) {
|
|
typedef back_insert_range<internal::basic_buffer<FMT_CHAR(String)> > range;
|
|
return vformat_to<arg_formatter<range>>(
|
|
buf, basic_string_view<Char>(format_str), args);
|
|
}
|
|
|
|
template <
|
|
typename String, typename... Args,
|
|
std::size_t SIZE = inline_buffer_size,
|
|
typename Char = typename internal::format_string_traits<String>::char_type>
|
|
inline typename buffer_context<Char>::type::iterator format_to(
|
|
basic_memory_buffer<Char, SIZE> &buf, const String &format_str,
|
|
const Args &... args) {
|
|
internal::check_format_string<Args...>(format_str);
|
|
typedef typename buffer_context<Char>::type context;
|
|
format_arg_store<context, Args...> as{args...};
|
|
return vformat_to(buf, basic_string_view<Char>(format_str),
|
|
basic_format_args<context>(as));
|
|
}
|
|
|
|
template <typename OutputIt, typename Char = char>
|
|
//using format_context_t = basic_format_context<OutputIt, Char>;
|
|
struct format_context_t { typedef basic_format_context<OutputIt, Char> type; };
|
|
|
|
template <typename OutputIt, typename Char = char>
|
|
//using format_args_t = basic_format_args<format_context_t<OutputIt, Char>>;
|
|
struct format_args_t {
|
|
typedef basic_format_args<
|
|
typename format_context_t<OutputIt, Char>::type> type;
|
|
};
|
|
|
|
template <typename String, typename OutputIt, typename... Args>
|
|
inline OutputIt vformat_to(
|
|
OutputIt out, const String &format_str,
|
|
typename format_args_t<OutputIt, FMT_CHAR(String)>::type args) {
|
|
typedef output_range<OutputIt, FMT_CHAR(String)> range;
|
|
return vformat_to<arg_formatter<range>>(range(out), format_str, args);
|
|
}
|
|
|
|
/**
|
|
\rst
|
|
Formats arguments, writes the result to the output iterator ``out`` and returns
|
|
the iterator past the end of the output range.
|
|
|
|
**Example**::
|
|
|
|
std::vector<char> out;
|
|
fmt::format_to(std::back_inserter(out), "{}", 42);
|
|
\endrst
|
|
*/
|
|
template <typename OutputIt, typename String, typename... Args>
|
|
inline typename std::enable_if<
|
|
internal::is_format_string<String>::value, OutputIt>::type
|
|
format_to(OutputIt out, const String &format_str, const Args &... args) {
|
|
internal::check_format_string<Args...>(format_str);
|
|
typedef typename format_context_t<OutputIt, FMT_CHAR(String)>::type context;
|
|
format_arg_store<context, Args...> as{args...};
|
|
return vformat_to(out, basic_string_view<FMT_CHAR(String)>(format_str),
|
|
basic_format_args<context>(as));
|
|
}
|
|
|
|
template <typename OutputIt>
|
|
struct format_to_n_result {
|
|
/** Iterator past the end of the output range. */
|
|
OutputIt out;
|
|
/** Total (not truncated) output size. */
|
|
std::size_t size;
|
|
};
|
|
|
|
template <typename OutputIt, typename Char = typename OutputIt::value_type>
|
|
using format_to_n_context = typename fmt::format_context_t<
|
|
fmt::internal::truncating_iterator<OutputIt>, Char>::type;
|
|
|
|
template <typename OutputIt, typename Char = typename OutputIt::value_type>
|
|
using format_to_n_args =
|
|
fmt::basic_format_args<format_to_n_context<OutputIt, Char>>;
|
|
|
|
template <typename OutputIt, typename Char, typename ...Args>
|
|
inline format_arg_store<format_to_n_context<OutputIt, Char>, Args...>
|
|
make_format_to_n_args(const Args &... args) {
|
|
return format_arg_store<
|
|
format_to_n_context<OutputIt, Char>, Args...>(args...);
|
|
}
|
|
|
|
template <typename OutputIt, typename Char, typename... Args>
|
|
inline format_to_n_result<OutputIt> vformat_to_n(
|
|
OutputIt out, std::size_t n, basic_string_view<Char> format_str,
|
|
format_to_n_args<OutputIt, Char> args) {
|
|
typedef internal::truncating_iterator<OutputIt> It;
|
|
auto it = vformat_to(It(out, n), format_str, args);
|
|
return {it.base(), it.count()};
|
|
}
|
|
|
|
/**
|
|
\rst
|
|
Formats arguments, writes up to ``n`` characters of the result to the output
|
|
iterator ``out`` and returns the total output size and the iterator past the
|
|
end of the output range.
|
|
\endrst
|
|
*/
|
|
template <typename OutputIt, typename String, typename... Args>
|
|
inline typename std::enable_if<
|
|
internal::is_format_string<String>::value,
|
|
format_to_n_result<OutputIt>>::type format_to_n(
|
|
OutputIt out, std::size_t n, const String &format_str,
|
|
const Args &... args) {
|
|
internal::check_format_string<Args...>(format_str);
|
|
typedef FMT_CHAR(String) Char;
|
|
format_arg_store<format_to_n_context<OutputIt, Char>, Args...> as{ args... };
|
|
return vformat_to_n(out, n, internal::to_string_view(format_str),
|
|
format_to_n_args<OutputIt, Char>(as));
|
|
}
|
|
|
|
template <typename Char>
|
|
inline std::basic_string<Char> internal::vformat(
|
|
basic_string_view<Char> format_str,
|
|
basic_format_args<typename buffer_context<Char>::type> args) {
|
|
basic_memory_buffer<Char> buffer;
|
|
vformat_to(buffer, format_str, args);
|
|
return fmt::to_string(buffer);
|
|
}
|
|
|
|
template <typename String, typename... Args>
|
|
inline typename std::enable_if<internal::is_compile_string<String>::value>::type
|
|
print(String format_str, const Args &... args) {
|
|
internal::check_format_string<Args...>(format_str);
|
|
return vprint(format_str.data(), make_format_args(args...));
|
|
}
|
|
|
|
/**
|
|
Returns the number of characters in the output of
|
|
``format(format_str, args...)``.
|
|
*/
|
|
template <typename... Args>
|
|
inline std::size_t formatted_size(string_view format_str,
|
|
const Args &... args) {
|
|
auto it = format_to(internal::counting_iterator<char>(), format_str, args...);
|
|
return it.count();
|
|
}
|
|
|
|
#if FMT_USE_USER_DEFINED_LITERALS
|
|
namespace internal {
|
|
|
|
# if FMT_UDL_TEMPLATE
|
|
template <typename Char, Char... CHARS>
|
|
class udl_formatter {
|
|
public:
|
|
template <typename... Args>
|
|
std::basic_string<Char> operator()(const Args &... args) const {
|
|
FMT_CONSTEXPR_DECL Char s[] = {CHARS..., '\0'};
|
|
FMT_CONSTEXPR_DECL bool invalid_format =
|
|
check_format_string<Char, error_handler, Args...>(
|
|
basic_string_view<Char>(s, sizeof...(CHARS)));
|
|
(void)invalid_format;
|
|
return format(s, args...);
|
|
}
|
|
};
|
|
# else
|
|
template <typename Char>
|
|
struct udl_formatter {
|
|
const Char *str;
|
|
|
|
template <typename... Args>
|
|
auto operator()(Args &&... args) const
|
|
-> decltype(format(str, std::forward<Args>(args)...)) {
|
|
return format(str, std::forward<Args>(args)...);
|
|
}
|
|
};
|
|
# endif // FMT_UDL_TEMPLATE
|
|
|
|
template <typename Char>
|
|
struct udl_arg {
|
|
const Char *str;
|
|
|
|
template <typename T>
|
|
named_arg<T, Char> operator=(T &&value) const {
|
|
return {str, std::forward<T>(value)};
|
|
}
|
|
};
|
|
|
|
} // namespace internal
|
|
|
|
inline namespace literals {
|
|
|
|
# if FMT_UDL_TEMPLATE
|
|
template <typename Char, Char... CHARS>
|
|
FMT_CONSTEXPR internal::udl_formatter<Char, CHARS...> operator""_format() {
|
|
return {};
|
|
}
|
|
# else
|
|
/**
|
|
\rst
|
|
User-defined literal equivalent of :func:`fmt::format`.
|
|
|
|
**Example**::
|
|
|
|
using namespace fmt::literals;
|
|
std::string message = "The answer is {}"_format(42);
|
|
\endrst
|
|
*/
|
|
inline internal::udl_formatter<char>
|
|
operator"" _format(const char *s, std::size_t) { return {s}; }
|
|
inline internal::udl_formatter<wchar_t>
|
|
operator"" _format(const wchar_t *s, std::size_t) { return {s}; }
|
|
# endif // FMT_UDL_TEMPLATE
|
|
|
|
/**
|
|
\rst
|
|
User-defined literal equivalent of :func:`fmt::arg`.
|
|
|
|
**Example**::
|
|
|
|
using namespace fmt::literals;
|
|
fmt::print("Elapsed time: {s:.2f} seconds", "s"_a=1.23);
|
|
\endrst
|
|
*/
|
|
inline internal::udl_arg<char>
|
|
operator"" _a(const char *s, std::size_t) { return {s}; }
|
|
inline internal::udl_arg<wchar_t>
|
|
operator"" _a(const wchar_t *s, std::size_t) { return {s}; }
|
|
} // inline namespace literals
|
|
#endif // FMT_USE_USER_DEFINED_LITERALS
|
|
FMT_END_NAMESPACE
|
|
|
|
#define FMT_STRING(s) [] { \
|
|
typedef typename std::decay<decltype(s)>::type pointer; \
|
|
struct S : fmt::compile_string { \
|
|
static FMT_CONSTEXPR pointer data() { return s; } \
|
|
static FMT_CONSTEXPR size_t size() { return sizeof(s); } \
|
|
explicit operator fmt::string_view() const { return s; } \
|
|
}; \
|
|
return S{}; \
|
|
}()
|
|
|
|
#if defined(FMT_STRING_ALIAS) && FMT_STRING_ALIAS
|
|
/**
|
|
\rst
|
|
Constructs a compile-time format string. This macro is disabled by default to
|
|
prevent potential name collisions. To enable it define ``FMT_STRING_ALIAS`` to
|
|
1 before including ``fmt/format.h``.
|
|
|
|
**Example**::
|
|
|
|
#define FMT_STRING_ALIAS 1
|
|
#include <fmt/format.h>
|
|
// A compile-time error because 'd' is an invalid specifier for strings.
|
|
std::string s = format(fmt("{:d}"), "foo");
|
|
\endrst
|
|
*/
|
|
# define fmt(s) FMT_STRING(s)
|
|
#endif
|
|
|
|
#ifdef FMT_HEADER_ONLY
|
|
# define FMT_FUNC inline
|
|
# include "format-inl.h"
|
|
#else
|
|
# define FMT_FUNC
|
|
#endif
|
|
|
|
// Restore warnings.
|
|
#if FMT_GCC_VERSION >= 406 || FMT_CLANG_VERSION
|
|
# pragma GCC diagnostic pop
|
|
#endif
|
|
|
|
#endif // FMT_FORMAT_H_
|