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Import fmt, for printfy goodness.

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Copyright (c) 2012 - 2016, Victor Zverovich
All rights reserved.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met:
1. Redistributions of source code must retain the above copyright notice, this
list of conditions and the following disclaimer.
2. Redistributions in binary form must reproduce the above copyright notice,
this list of conditions and the following disclaimer in the documentation
and/or other materials provided with the distribution.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

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{fmt}
=====
.. image:: https://travis-ci.org/fmtlib/fmt.png?branch=master
:target: https://travis-ci.org/fmtlib/fmt
.. image:: https://ci.appveyor.com/api/projects/status/ehjkiefde6gucy1v
:target: https://ci.appveyor.com/project/vitaut/fmt
.. image:: https://badges.gitter.im/Join%20Chat.svg
:alt: Join the chat at https://gitter.im/fmtlib/fmt
:target: https://gitter.im/fmtlib/fmt
**{fmt}** is an open-source formatting library for C++.
It can be used as a safe and fast alternative to (s)printf and IOStreams.
`Documentation <http://fmtlib.net/latest/>`__
This is a development branch that implements the C++ standards proposal `P0645
Text Formatting <http://fmtlib.net/Text%20Formatting.html>`__.
Released versions are available from the `Releases page
<https://github.com/fmtlib/fmt/releases>`__.
Features
--------
* Replacement-based `format API <http://fmtlib.net/dev/api.html>`_ with
positional arguments for localization.
* `Format string syntax <http://fmtlib.net/dev/syntax.html>`_ similar to the one
of `str.format <https://docs.python.org/2/library/stdtypes.html#str.format>`_
in Python.
* Safe `printf implementation
<http://fmtlib.net/latest/api.html#printf-formatting-functions>`_ including
the POSIX extension for positional arguments.
* Support for user-defined types.
* High speed: performance of the format API is close to that of glibc's `printf
<http://en.cppreference.com/w/cpp/io/c/fprintf>`_ and better than the
performance of IOStreams. See `Speed tests`_ and
`Fast integer to string conversion in C++
<http://zverovich.net/2013/09/07/integer-to-string-conversion-in-cplusplus.html>`_.
* Small code size both in terms of source code (the minimum configuration
consists of just three header files, ``core.h``, ``format.h`` and
``format-inl.h``) and compiled code. See `Compile time and code bloat`_.
* Reliability: the library has an extensive set of `unit tests
<https://github.com/fmtlib/fmt/tree/master/test>`_.
* Safety: the library is fully type safe, errors in format strings can be
reported at compile time, automatic memory management prevents buffer overflow
errors.
* Ease of use: small self-contained code base, no external dependencies,
permissive BSD `license
<https://github.com/fmtlib/fmt/blob/master/LICENSE.rst>`_
* `Portability <http://fmtlib.net/latest/index.html#portability>`_ with
consistent output across platforms and support for older compilers.
* Clean warning-free codebase even on high warning levels
(``-Wall -Wextra -pedantic``).
* Support for wide strings.
* Optional header-only configuration enabled with the ``FMT_HEADER_ONLY`` macro.
See the `documentation <http://fmtlib.net/latest/>`_ for more details.
Examples
--------
This prints ``Hello, world!`` to stdout:
.. code:: c++
fmt::print("Hello, {}!", "world"); // uses Python-like format string syntax
fmt::printf("Hello, %s!", "world"); // uses printf format string syntax
Arguments can be accessed by position and arguments' indices can be repeated:
.. code:: c++
std::string s = fmt::format("{0}{1}{0}", "abra", "cad");
// s == "abracadabra"
Format strings can be checked at compile time:
.. code:: c++
// test.cc
#define FMT_STRING_ALIAS 1
#include <fmt/format.h>
std::string s = format(fmt("{2}"), 42);
.. code::
$ c++ -Iinclude -std=c++14 test.cc
...
test.cc:4:17: note: in instantiation of function template specialization 'fmt::v5::format<S, int>' requested here
std::string s = format(fmt("{2}"), 42);
^
include/fmt/core.h:778:19: note: non-constexpr function 'on_error' cannot be used in a constant expression
ErrorHandler::on_error(message);
^
include/fmt/format.h:2226:16: note: in call to '&checker.context_->on_error(&"argument index out of range"[0])'
context_.on_error("argument index out of range");
^
{fmt} can be used as a safe portable replacement for ``itoa``
(`godbolt <https://godbolt.org/g/NXmpU4>`_):
.. code:: c++
fmt::memory_buffer buf;
format_to(buf, "{}", 42); // replaces itoa(42, buffer, 10)
format_to(buf, "{:x}", 42); // replaces itoa(42, buffer, 16)
// access the string using to_string(buf) or buf.data()
Formatting of user-defined types is supported via a simple
`extension API <http://fmtlib.net/latest/api.html#formatting-user-defined-types>`_:
.. code:: c++
#include "fmt/format.h"
struct date {
int year, month, day;
};
template <>
struct fmt::formatter<date> {
template <typename ParseContext>
constexpr auto parse(ParseContext &ctx) { return ctx.begin(); }
template <typename FormatContext>
auto format(const date &d, FormatContext &ctx) {
return format_to(ctx.begin(), "{}-{}-{}", d.year, d.month, d.day);
}
};
std::string s = fmt::format("The date is {}", date{2012, 12, 9});
// s == "The date is 2012-12-9"
You can create your own functions similar to `format
<http://fmtlib.net/latest/api.html#format>`_ and
`print <http://fmtlib.net/latest/api.html#print>`_
which take arbitrary arguments (`godbolt <https://godbolt.org/g/MHjHVf>`_):
.. code:: c++
// Prints formatted error message.
void vreport_error(const char *format, fmt::format_args args) {
fmt::print("Error: ");
fmt::vprint(format, args);
}
template <typename... Args>
void report_error(const char *format, const Args & ... args) {
vreport_error(format, fmt::make_format_args(args...));
}
report_error("file not found: {}", path);
Note that ``vreport_error`` is not parameterized on argument types which can
improve compile times and reduce code size compared to fully parameterized version.
Projects using this library
---------------------------
* `0 A.D. <http://play0ad.com/>`_: A free, open-source, cross-platform real-time strategy game
* `AMPL/MP <https://github.com/ampl/mp>`_:
An open-source library for mathematical programming
* `AvioBook <https://www.aviobook.aero/en>`_: A comprehensive aircraft operations suite
* `CUAUV <http://cuauv.org/>`_: Cornell University's autonomous underwater vehicle
* `HarpyWar/pvpgn <https://github.com/pvpgn/pvpgn-server>`_:
Player vs Player Gaming Network with tweaks
* `KBEngine <http://kbengine.org/>`_: An open-source MMOG server engine
* `Keypirinha <http://keypirinha.com/>`_: A semantic launcher for Windows
* `Kodi <https://kodi.tv/>`_ (formerly xbmc): Home theater software
* `Lifeline <https://github.com/peter-clark/lifeline>`_: A 2D game
* `Drake <http://drake.mit.edu/>`_: A planning, control, and analysis toolbox
for nonlinear dynamical systems (MIT)
* `Envoy <https://lyft.github.io/envoy/>`_: C++ L7 proxy and communication bus
(Lyft)
* `FiveM <https://fivem.net/>`_: a modification framework for GTA V
* `MongoDB Smasher <https://github.com/duckie/mongo_smasher>`_: A small tool to
generate randomized datasets
* `OpenSpace <http://openspaceproject.com/>`_: An open-source astrovisualization
framework
* `PenUltima Online (POL) <http://www.polserver.com/>`_:
An MMO server, compatible with most Ultima Online clients
* `quasardb <https://www.quasardb.net/>`_: A distributed, high-performance,
associative database
* `readpe <https://bitbucket.org/sys_dev/readpe>`_: Read Portable Executable
* `redis-cerberus <https://github.com/HunanTV/redis-cerberus>`_: A Redis cluster proxy
* `Saddy <https://github.com/mamontov-cpp/saddy-graphics-engine-2d>`_:
Small crossplatform 2D graphic engine
* `Salesforce Analytics Cloud <http://www.salesforce.com/analytics-cloud/overview/>`_:
Business intelligence software
* `Scylla <http://www.scylladb.com/>`_: A Cassandra-compatible NoSQL data store that can handle
1 million transactions per second on a single server
* `Seastar <http://www.seastar-project.org/>`_: An advanced, open-source C++ framework for
high-performance server applications on modern hardware
* `spdlog <https://github.com/gabime/spdlog>`_: Super fast C++ logging library
* `Stellar <https://www.stellar.org/>`_: Financial platform
* `Touch Surgery <https://www.touchsurgery.com/>`_: Surgery simulator
* `TrinityCore <https://github.com/TrinityCore/TrinityCore>`_: Open-source MMORPG framework
`More... <https://github.com/search?q=cppformat&type=Code>`_
If you are aware of other projects using this library, please let me know
by `email <mailto:victor.zverovich@gmail.com>`_ or by submitting an
`issue <https://github.com/fmtlib/fmt/issues>`_.
Motivation
----------
So why yet another formatting library?
There are plenty of methods for doing this task, from standard ones like
the printf family of function and IOStreams to Boost Format library and
FastFormat. The reason for creating a new library is that every existing
solution that I found either had serious issues or didn't provide
all the features I needed.
Printf
~~~~~~
The good thing about printf is that it is pretty fast and readily available
being a part of the C standard library. The main drawback is that it
doesn't support user-defined types. Printf also has safety issues although
they are mostly solved with `__attribute__ ((format (printf, ...))
<http://gcc.gnu.org/onlinedocs/gcc/Function-Attributes.html>`_ in GCC.
There is a POSIX extension that adds positional arguments required for
`i18n <https://en.wikipedia.org/wiki/Internationalization_and_localization>`_
to printf but it is not a part of C99 and may not be available on some
platforms.
IOStreams
~~~~~~~~~
The main issue with IOStreams is best illustrated with an example:
.. code:: c++
std::cout << std::setprecision(2) << std::fixed << 1.23456 << "\n";
which is a lot of typing compared to printf:
.. code:: c++
printf("%.2f\n", 1.23456);
Matthew Wilson, the author of FastFormat, referred to this situation with
IOStreams as "chevron hell". IOStreams doesn't support positional arguments
by design.
The good part is that IOStreams supports user-defined types and is safe
although error reporting is awkward.
Boost Format library
~~~~~~~~~~~~~~~~~~~~
This is a very powerful library which supports both printf-like format
strings and positional arguments. Its main drawback is performance.
According to various benchmarks it is much slower than other methods
considered here. Boost Format also has excessive build times and severe
code bloat issues (see `Benchmarks`_).
FastFormat
~~~~~~~~~~
This is an interesting library which is fast, safe and has positional
arguments. However it has significant limitations, citing its author:
Three features that have no hope of being accommodated within the
current design are:
* Leading zeros (or any other non-space padding)
* Octal/hexadecimal encoding
* Runtime width/alignment specification
It is also quite big and has a heavy dependency, STLSoft, which might be
too restrictive for using it in some projects.
Loki SafeFormat
~~~~~~~~~~~~~~~
SafeFormat is a formatting library which uses printf-like format strings
and is type safe. It doesn't support user-defined types or positional
arguments. It makes unconventional use of ``operator()`` for passing
format arguments.
Tinyformat
~~~~~~~~~~
This library supports printf-like format strings and is very small and
fast. Unfortunately it doesn't support positional arguments and wrapping
it in C++98 is somewhat difficult. Also its performance and code compactness
are limited by IOStreams.
Boost Spirit.Karma
~~~~~~~~~~~~~~~~~~
This is not really a formatting library but I decided to include it here
for completeness. As IOStreams it suffers from the problem of mixing
verbatim text with arguments. The library is pretty fast, but slower
on integer formatting than ``fmt::Writer`` on Karma's own benchmark,
see `Fast integer to string conversion in C++
<http://zverovich.net/2013/09/07/integer-to-string-conversion-in-cplusplus.html>`_.
Benchmarks
----------
Speed tests
~~~~~~~~~~~
The following speed tests results were generated by building
``tinyformat_test.cpp`` on Ubuntu GNU/Linux 14.04.1 with
``g++-4.8.2 -O3 -DSPEED_TEST -DHAVE_FORMAT``, and taking the best of three
runs. In the test, the format string ``"%0.10f:%04d:%+g:%s:%p:%c:%%\n"`` or
equivalent is filled 2000000 times with output sent to ``/dev/null``; for
further details see the `source
<https://github.com/fmtlib/format-benchmark/blob/master/tinyformat_test.cpp>`_.
================= ============= ===========
Library Method Run Time, s
================= ============= ===========
libc printf 1.35
libc++ std::ostream 3.42
fmt 534bff7 fmt::print 1.56
tinyformat 2.0.1 tfm::printf 3.73
Boost Format 1.54 boost::format 8.44
Folly Format folly::format 2.54
================= ============= ===========
As you can see ``boost::format`` is much slower than the alternative methods; this
is confirmed by `other tests <http://accu.org/index.php/journals/1539>`_.
Tinyformat is quite good coming close to IOStreams. Unfortunately tinyformat
cannot be faster than the IOStreams because it uses them internally.
Performance of fmt is close to that of printf, being `faster than printf on integer
formatting <http://zverovich.net/2013/09/07/integer-to-string-conversion-in-cplusplus.html>`_,
but slower on floating-point formatting which dominates this benchmark.
Compile time and code bloat
~~~~~~~~~~~~~~~~~~~~~~~~~~~
The script `bloat-test.py
<https://github.com/fmtlib/format-benchmark/blob/master/bloat-test.py>`_
from `format-benchmark <https://github.com/fmtlib/format-benchmark>`_
tests compile time and code bloat for nontrivial projects.
It generates 100 translation units and uses ``printf()`` or its alternative
five times in each to simulate a medium sized project. The resulting
executable size and compile time (Apple LLVM version 8.1.0 (clang-802.0.42),
macOS Sierra, best of three) is shown in the following tables.
**Optimized build (-O3)**
============= =============== ==================== ==================
Method Compile Time, s Executable size, KiB Stripped size, KiB
============= =============== ==================== ==================
printf 2.6 29 26
printf+string 16.4 29 26
IOStreams 31.1 59 55
fmt 19.0 37 34
tinyformat 44.0 103 97
Boost Format 91.9 226 203
Folly Format 115.7 101 88
============= =============== ==================== ==================
As you can see, fmt has 60% less overhead in terms of resulting binary code
size compared to IOStreams and comes pretty close to ``printf``. Boost Format
and Folly Format have the largest overheads.
``printf+string`` is the same as ``printf`` but with extra ``<string>``
include to measure the overhead of the latter.
**Non-optimized build**
============= =============== ==================== ==================
Method Compile Time, s Executable size, KiB Stripped size, KiB
============= =============== ==================== ==================
printf 2.2 33 30
printf+string 16.0 33 30
IOStreams 28.3 56 52
fmt 18.2 59 50
tinyformat 32.6 88 82
Boost Format 54.1 365 303
Folly Format 79.9 445 430
============= =============== ==================== ==================
``libc``, ``lib(std)c++`` and ``libfmt`` are all linked as shared
libraries to compare formatting function overhead only. Boost Format
and tinyformat are header-only libraries so they don't provide any
linkage options.
Running the tests
~~~~~~~~~~~~~~~~~
Please refer to `Building the library`__ for the instructions on how to build
the library and run the unit tests.
__ http://fmtlib.net/latest/usage.html#building-the-library
Benchmarks reside in a separate repository,
`format-benchmarks <https://github.com/fmtlib/format-benchmark>`_,
so to run the benchmarks you first need to clone this repository and
generate Makefiles with CMake::
$ git clone --recursive https://github.com/fmtlib/format-benchmark.git
$ cd format-benchmark
$ cmake .
Then you can run the speed test::
$ make speed-test
or the bloat test::
$ make bloat-test
FAQ
---
Q: how can I capture formatting arguments and format them later?
A: use ``std::tuple``:
.. code:: c++
template <typename... Args>
auto capture(const Args&... args) {
return std::make_tuple(args...);
}
auto print_message = [](const auto&... args) {
fmt::print(args...);
};
// Capture and store arguments:
auto args = capture("{} {}", 42, "foo");
// Do formatting:
std::apply(print_message, args);
License
-------
fmt is distributed under the BSD `license
<https://github.com/fmtlib/fmt/blob/master/LICENSE.rst>`_.
The `Format String Syntax
<http://fmtlib.net/latest/syntax.html>`_
section in the documentation is based on the one from Python `string module
documentation <https://docs.python.org/3/library/string.html#module-string>`_
adapted for the current library. For this reason the documentation is
distributed under the Python Software Foundation license available in
`doc/python-license.txt
<https://raw.github.com/fmtlib/fmt/master/doc/python-license.txt>`_.
It only applies if you distribute the documentation of fmt.
Acknowledgments
---------------
The fmt library is maintained by Victor Zverovich (`vitaut
<https://github.com/vitaut>`_) and Jonathan Müller (`foonathan
<https://github.com/foonathan>`_) with contributions from many other people.
See `Contributors <https://github.com/fmtlib/fmt/graphs/contributors>`_ and
`Releases <https://github.com/fmtlib/fmt/releases>`_ for some of the names.
Let us know if your contribution is not listed or mentioned incorrectly and
we'll make it right.
The benchmark section of this readme file and the performance tests are taken
from the excellent `tinyformat <https://github.com/c42f/tinyformat>`_ library
written by Chris Foster. Boost Format library is acknowledged transitively
since it had some influence on tinyformat.
Some ideas used in the implementation are borrowed from `Loki
<http://loki-lib.sourceforge.net/>`_ SafeFormat and `Diagnostic API
<http://clang.llvm.org/doxygen/classclang_1_1Diagnostic.html>`_ in
`Clang <http://clang.llvm.org/>`_.
Format string syntax and the documentation are based on Python's `str.format
<http://docs.python.org/2/library/stdtypes.html#str.format>`_.
Thanks `Doug Turnbull <https://github.com/softwaredoug>`_ for his valuable
comments and contribution to the design of the type-safe API and
`Gregory Czajkowski <https://github.com/gcflymoto>`_ for implementing binary
formatting. Thanks `Ruslan Baratov <https://github.com/ruslo>`_ for comprehensive
`comparison of integer formatting algorithms <https://github.com/ruslo/int-dec-format-tests>`_
and useful comments regarding performance, `Boris Kaul <https://github.com/localvoid>`_ for
`C++ counting digits benchmark <https://github.com/localvoid/cxx-benchmark-count-digits>`_.
Thanks to `CarterLi <https://github.com/CarterLi>`_ for contributing various
improvements to the code.

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// Formatting library for C++ - color support
//
// Copyright (c) 2018 - present, Victor Zverovich and fmt contributors
// All rights reserved.
//
// For the license information refer to format.h.
#ifndef FMT_COLOR_H_
#define FMT_COLOR_H_
#include "format.h"
FMT_BEGIN_NAMESPACE
#ifdef FMT_DEPRECATED_COLORS
// color and (v)print_colored are deprecated.
enum color { black, red, green, yellow, blue, magenta, cyan, white };
FMT_API void vprint_colored(color c, string_view format, format_args args);
FMT_API void vprint_colored(color c, wstring_view format, wformat_args args);
template <typename... Args>
inline void print_colored(color c, string_view format_str,
const Args & ... args) {
vprint_colored(c, format_str, make_format_args(args...));
}
template <typename... Args>
inline void print_colored(color c, wstring_view format_str,
const Args & ... args) {
vprint_colored(c, format_str, make_format_args<wformat_context>(args...));
}
inline void vprint_colored(color c, string_view format, format_args args) {
char escape[] = "\x1b[30m";
escape[3] = static_cast<char>('0' + c);
std::fputs(escape, stdout);
vprint(format, args);
std::fputs(internal::data::RESET_COLOR, stdout);
}
inline void vprint_colored(color c, wstring_view format, wformat_args args) {
wchar_t escape[] = L"\x1b[30m";
escape[3] = static_cast<wchar_t>('0' + c);
std::fputws(escape, stdout);
vprint(format, args);
std::fputws(internal::data::WRESET_COLOR, stdout);
}
#else
// Experimental color support.
enum class color : uint32_t {
alice_blue = 0xF0F8FF, // rgb(240,248,255)
antique_white = 0xFAEBD7, // rgb(250,235,215)
aqua = 0x00FFFF, // rgb(0,255,255)
aquamarine = 0x7FFFD4, // rgb(127,255,212)
azure = 0xF0FFFF, // rgb(240,255,255)
beige = 0xF5F5DC, // rgb(245,245,220)
bisque = 0xFFE4C4, // rgb(255,228,196)
black = 0x000000, // rgb(0,0,0)
blanched_almond = 0xFFEBCD, // rgb(255,235,205)
blue = 0x0000FF, // rgb(0,0,255)
blue_violet = 0x8A2BE2, // rgb(138,43,226)
brown = 0xA52A2A, // rgb(165,42,42)
burly_wood = 0xDEB887, // rgb(222,184,135)
cadet_blue = 0x5F9EA0, // rgb(95,158,160)
chartreuse = 0x7FFF00, // rgb(127,255,0)
chocolate = 0xD2691E, // rgb(210,105,30)
coral = 0xFF7F50, // rgb(255,127,80)
cornflower_blue = 0x6495ED, // rgb(100,149,237)
cornsilk = 0xFFF8DC, // rgb(255,248,220)
crimson = 0xDC143C, // rgb(220,20,60)
cyan = 0x00FFFF, // rgb(0,255,255)
dark_blue = 0x00008B, // rgb(0,0,139)
dark_cyan = 0x008B8B, // rgb(0,139,139)
dark_golden_rod = 0xB8860B, // rgb(184,134,11)
dark_gray = 0xA9A9A9, // rgb(169,169,169)
dark_green = 0x006400, // rgb(0,100,0)
dark_khaki = 0xBDB76B, // rgb(189,183,107)
dark_magenta = 0x8B008B, // rgb(139,0,139)
dark_olive_green = 0x556B2F, // rgb(85,107,47)
dark_orange = 0xFF8C00, // rgb(255,140,0)
dark_orchid = 0x9932CC, // rgb(153,50,204)
dark_red = 0x8B0000, // rgb(139,0,0)
dark_salmon = 0xE9967A, // rgb(233,150,122)
dark_sea_green = 0x8FBC8F, // rgb(143,188,143)
dark_slate_blue = 0x483D8B, // rgb(72,61,139)
dark_slate_gray = 0x2F4F4F, // rgb(47,79,79)
dark_turquoise = 0x00CED1, // rgb(0,206,209)
dark_violet = 0x9400D3, // rgb(148,0,211)
deep_pink = 0xFF1493, // rgb(255,20,147)
deep_sky_blue = 0x00BFFF, // rgb(0,191,255)
dim_gray = 0x696969, // rgb(105,105,105)
dodger_blue = 0x1E90FF, // rgb(30,144,255)
fire_brick = 0xB22222, // rgb(178,34,34)
floral_white = 0xFFFAF0, // rgb(255,250,240)
forest_green = 0x228B22, // rgb(34,139,34)
fuchsia = 0xFF00FF, // rgb(255,0,255)
gainsboro = 0xDCDCDC, // rgb(220,220,220)
ghost_white = 0xF8F8FF, // rgb(248,248,255)
gold = 0xFFD700, // rgb(255,215,0)
golden_rod = 0xDAA520, // rgb(218,165,32)
gray = 0x808080, // rgb(128,128,128)
green = 0x008000, // rgb(0,128,0)
green_yellow = 0xADFF2F, // rgb(173,255,47)
honey_dew = 0xF0FFF0, // rgb(240,255,240)
hot_pink = 0xFF69B4, // rgb(255,105,180)
indian_red = 0xCD5C5C, // rgb(205,92,92)
indigo = 0x4B0082, // rgb(75,0,130)
ivory = 0xFFFFF0, // rgb(255,255,240)
khaki = 0xF0E68C, // rgb(240,230,140)
lavender = 0xE6E6FA, // rgb(230,230,250)
lavender_blush = 0xFFF0F5, // rgb(255,240,245)
lawn_green = 0x7CFC00, // rgb(124,252,0)
lemon_chiffon = 0xFFFACD, // rgb(255,250,205)
light_blue = 0xADD8E6, // rgb(173,216,230)
light_coral = 0xF08080, // rgb(240,128,128)
light_cyan = 0xE0FFFF, // rgb(224,255,255)
light_golden_rod_yellow = 0xFAFAD2, // rgb(250,250,210)
light_gray = 0xD3D3D3, // rgb(211,211,211)
light_green = 0x90EE90, // rgb(144,238,144)
light_pink = 0xFFB6C1, // rgb(255,182,193)
light_salmon = 0xFFA07A, // rgb(255,160,122)
light_sea_green = 0x20B2AA, // rgb(32,178,170)
light_sky_blue = 0x87CEFA, // rgb(135,206,250)
light_slate_gray = 0x778899, // rgb(119,136,153)
light_steel_blue = 0xB0C4DE, // rgb(176,196,222)
light_yellow = 0xFFFFE0, // rgb(255,255,224)
lime = 0x00FF00, // rgb(0,255,0)
lime_green = 0x32CD32, // rgb(50,205,50)
linen = 0xFAF0E6, // rgb(250,240,230)
magenta = 0xFF00FF, // rgb(255,0,255)
maroon = 0x800000, // rgb(128,0,0)
medium_aquamarine = 0x66CDAA, // rgb(102,205,170)
medium_blue = 0x0000CD, // rgb(0,0,205)
medium_orchid = 0xBA55D3, // rgb(186,85,211)
medium_purple = 0x9370DB, // rgb(147,112,219)
medium_sea_green = 0x3CB371, // rgb(60,179,113)
medium_slate_blue = 0x7B68EE, // rgb(123,104,238)
medium_spring_green = 0x00FA9A, // rgb(0,250,154)
medium_turquoise = 0x48D1CC, // rgb(72,209,204)
medium_violet_red = 0xC71585, // rgb(199,21,133)
midnight_blue = 0x191970, // rgb(25,25,112)
mint_cream = 0xF5FFFA, // rgb(245,255,250)
misty_rose = 0xFFE4E1, // rgb(255,228,225)
moccasin = 0xFFE4B5, // rgb(255,228,181)
navajo_white = 0xFFDEAD, // rgb(255,222,173)
navy = 0x000080, // rgb(0,0,128)
old_lace = 0xFDF5E6, // rgb(253,245,230)
olive = 0x808000, // rgb(128,128,0)
olive_drab = 0x6B8E23, // rgb(107,142,35)
orange = 0xFFA500, // rgb(255,165,0)
orange_red = 0xFF4500, // rgb(255,69,0)
orchid = 0xDA70D6, // rgb(218,112,214)
pale_golden_rod = 0xEEE8AA, // rgb(238,232,170)
pale_green = 0x98FB98, // rgb(152,251,152)
pale_turquoise = 0xAFEEEE, // rgb(175,238,238)
pale_violet_red = 0xDB7093, // rgb(219,112,147)
papaya_whip = 0xFFEFD5, // rgb(255,239,213)
peach_puff = 0xFFDAB9, // rgb(255,218,185)
peru = 0xCD853F, // rgb(205,133,63)
pink = 0xFFC0CB, // rgb(255,192,203)
plum = 0xDDA0DD, // rgb(221,160,221)
powder_blue = 0xB0E0E6, // rgb(176,224,230)
purple = 0x800080, // rgb(128,0,128)
rebecca_purple = 0x663399, // rgb(102,51,153)
red = 0xFF0000, // rgb(255,0,0)
rosy_brown = 0xBC8F8F, // rgb(188,143,143)
royal_blue = 0x4169E1, // rgb(65,105,225)
saddle_brown = 0x8B4513, // rgb(139,69,19)
salmon = 0xFA8072, // rgb(250,128,114)
sandy_brown = 0xF4A460, // rgb(244,164,96)
sea_green = 0x2E8B57, // rgb(46,139,87)
sea_shell = 0xFFF5EE, // rgb(255,245,238)
sienna = 0xA0522D, // rgb(160,82,45)
silver = 0xC0C0C0, // rgb(192,192,192)
sky_blue = 0x87CEEB, // rgb(135,206,235)
slate_blue = 0x6A5ACD, // rgb(106,90,205)
slate_gray = 0x708090, // rgb(112,128,144)
snow = 0xFFFAFA, // rgb(255,250,250)
spring_green = 0x00FF7F, // rgb(0,255,127)
steel_blue = 0x4682B4, // rgb(70,130,180)
tan = 0xD2B48C, // rgb(210,180,140)
teal = 0x008080, // rgb(0,128,128)
thistle = 0xD8BFD8, // rgb(216,191,216)
tomato = 0xFF6347, // rgb(255,99,71)
turquoise = 0x40E0D0, // rgb(64,224,208)
violet = 0xEE82EE, // rgb(238,130,238)
wheat = 0xF5DEB3, // rgb(245,222,179)
white = 0xFFFFFF, // rgb(255,255,255)
white_smoke = 0xF5F5F5, // rgb(245,245,245)
yellow = 0xFFFF00, // rgb(255,255,0)
yellow_green = 0x9ACD32, // rgb(154,205,50)
}; // enum class color
// rgb is a struct for red, green and blue colors.
// We use rgb as name because some editors will show it as color direct in the
// editor.
struct rgb {
FMT_CONSTEXPR_DECL rgb() : r(0), g(0), b(0) {}
FMT_CONSTEXPR_DECL rgb(uint8_t r_, uint8_t g_, uint8_t b_)
: r(r_), g(g_), b(b_) {}
FMT_CONSTEXPR_DECL rgb(uint32_t hex)
: r((hex >> 16) & 0xFF), g((hex >> 8) & 0xFF), b((hex) & 0xFF) {}
FMT_CONSTEXPR_DECL rgb(color hex)
: r((uint32_t(hex) >> 16) & 0xFF), g((uint32_t(hex) >> 8) & 0xFF),
b(uint32_t(hex) & 0xFF) {}
uint8_t r;
uint8_t g;
uint8_t b;
};
void vprint_rgb(rgb fd, string_view format, format_args args);
void vprint_rgb(rgb fd, rgb bg, string_view format, format_args args);
/**
Formats a string and prints it to stdout using ANSI escape sequences to
specify foreground color 'fd'.
Example:
fmt::print(fmt::color::red, "Elapsed time: {0:.2f} seconds", 1.23);
*/
template <typename... Args>
inline void print(rgb fd, string_view format_str, const Args & ... args) {
vprint_rgb(fd, format_str, make_format_args(args...));
}
/**
Formats a string and prints it to stdout using ANSI escape sequences to
specify foreground color 'fd' and background color 'bg'.
Example:
fmt::print(fmt::color::red, fmt::color::black,
"Elapsed time: {0:.2f} seconds", 1.23);
*/
template <typename... Args>
inline void print(rgb fd, rgb bg, string_view format_str,
const Args & ... args) {
vprint_rgb(fd, bg, format_str, make_format_args(args...));
}
namespace internal {
FMT_CONSTEXPR void to_esc(uint8_t c, char out[], int offset) {
out[offset + 0] = static_cast<char>('0' + c / 100);
out[offset + 1] = static_cast<char>('0' + c / 10 % 10);
out[offset + 2] = static_cast<char>('0' + c % 10);
}
} // namespace internal
inline void vprint_rgb(rgb fd, string_view format, format_args args) {
char escape_fd[] = "\x1b[38;2;000;000;000m";
internal::to_esc(fd.r, escape_fd, 7);
internal::to_esc(fd.g, escape_fd, 11);
internal::to_esc(fd.b, escape_fd, 15);
std::fputs(escape_fd, stdout);
vprint(format, args);
std::fputs(internal::data::RESET_COLOR, stdout);
}
inline void vprint_rgb(rgb fd, rgb bg, string_view format, format_args args) {
char escape_fd[] = "\x1b[38;2;000;000;000m"; // foreground color
char escape_bg[] = "\x1b[48;2;000;000;000m"; // background color
internal::to_esc(fd.r, escape_fd, 7);
internal::to_esc(fd.g, escape_fd, 11);
internal::to_esc(fd.b, escape_fd, 15);
internal::to_esc(bg.r, escape_bg, 7);
internal::to_esc(bg.g, escape_bg, 11);
internal::to_esc(bg.b, escape_bg, 15);
std::fputs(escape_fd, stdout);
std::fputs(escape_bg, stdout);
vprint(format, args);
std::fputs(internal::data::RESET_COLOR, stdout);
}
#endif
FMT_END_NAMESPACE
#endif // FMT_COLOR_H_

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// Formatting library for C++
//
// Copyright (c) 2012 - 2016, Victor Zverovich
// All rights reserved.
//
// For the license information refer to format.h.
#ifndef FMT_FORMAT_INL_H_
#define FMT_FORMAT_INL_H_
#include "format.h"
#include <string.h>
#include <cctype>
#include <cerrno>
#include <climits>
#include <cmath>
#include <cstdarg>
#include <cstddef> // for std::ptrdiff_t
#include <cstring> // for std::memmove
#if !defined(FMT_STATIC_THOUSANDS_SEPARATOR)
# include <locale>
#endif
#if FMT_USE_WINDOWS_H
# if !defined(FMT_HEADER_ONLY) && !defined(WIN32_LEAN_AND_MEAN)
# define WIN32_LEAN_AND_MEAN
# endif
# if defined(NOMINMAX) || defined(FMT_WIN_MINMAX)
# include <windows.h>
# else
# define NOMINMAX
# include <windows.h>
# undef NOMINMAX
# endif
#endif
#if FMT_EXCEPTIONS
# define FMT_TRY try
# define FMT_CATCH(x) catch (x)
#else
# define FMT_TRY if (true)
# define FMT_CATCH(x) if (false)
#endif
#ifdef _MSC_VER
# pragma warning(push)
# pragma warning(disable: 4127) // conditional expression is constant
# pragma warning(disable: 4702) // unreachable code
// Disable deprecation warning for strerror. The latter is not called but
// MSVC fails to detect it.
# pragma warning(disable: 4996)
#endif
// Dummy implementations of strerror_r and strerror_s called if corresponding
// system functions are not available.
inline fmt::internal::null<> strerror_r(int, char *, ...) {
return fmt::internal::null<>();
}
inline fmt::internal::null<> strerror_s(char *, std::size_t, ...) {
return fmt::internal::null<>();
}
FMT_BEGIN_NAMESPACE
namespace {
#ifndef _MSC_VER
# define FMT_SNPRINTF snprintf
#else // _MSC_VER
inline int fmt_snprintf(char *buffer, size_t size, const char *format, ...) {
va_list args;
va_start(args, format);
int result = vsnprintf_s(buffer, size, _TRUNCATE, format, args);
va_end(args);
return result;
}
# define FMT_SNPRINTF fmt_snprintf
#endif // _MSC_VER
#if defined(_WIN32) && defined(__MINGW32__) && !defined(__NO_ISOCEXT)
# define FMT_SWPRINTF snwprintf
#else
# define FMT_SWPRINTF swprintf
#endif // defined(_WIN32) && defined(__MINGW32__) && !defined(__NO_ISOCEXT)
typedef void (*FormatFunc)(internal::buffer &, int, string_view);
// Portable thread-safe version of strerror.
// Sets buffer to point to a string describing the error code.
// This can be either a pointer to a string stored in buffer,
// or a pointer to some static immutable string.
// Returns one of the following values:
// 0 - success
// ERANGE - buffer is not large enough to store the error message
// other - failure
// Buffer should be at least of size 1.
int safe_strerror(
int error_code, char *&buffer, std::size_t buffer_size) FMT_NOEXCEPT {
FMT_ASSERT(buffer != FMT_NULL && buffer_size != 0, "invalid buffer");
class dispatcher {
private:
int error_code_;
char *&buffer_;
std::size_t buffer_size_;
// A noop assignment operator to avoid bogus warnings.
void operator=(const dispatcher &) {}
// Handle the result of XSI-compliant version of strerror_r.
int handle(int result) {
// glibc versions before 2.13 return result in errno.
return result == -1 ? errno : result;
}
// Handle the result of GNU-specific version of strerror_r.
int handle(char *message) {
// If the buffer is full then the message is probably truncated.
if (message == buffer_ && strlen(buffer_) == buffer_size_ - 1)
return ERANGE;
buffer_ = message;
return 0;
}
// Handle the case when strerror_r is not available.
int handle(internal::null<>) {
return fallback(strerror_s(buffer_, buffer_size_, error_code_));
}
// Fallback to strerror_s when strerror_r is not available.
int fallback(int result) {
// If the buffer is full then the message is probably truncated.
return result == 0 && strlen(buffer_) == buffer_size_ - 1 ?
ERANGE : result;
}
// Fallback to strerror if strerror_r and strerror_s are not available.
int fallback(internal::null<>) {
errno = 0;
buffer_ = strerror(error_code_);
return errno;
}
public:
dispatcher(int err_code, char *&buf, std::size_t buf_size)
: error_code_(err_code), buffer_(buf), buffer_size_(buf_size) {}
int run() {
return handle(strerror_r(error_code_, buffer_, buffer_size_));
}
};
return dispatcher(error_code, buffer, buffer_size).run();
}
void format_error_code(internal::buffer &out, int error_code,
string_view message) FMT_NOEXCEPT {
// Report error code making sure that the output fits into
// inline_buffer_size to avoid dynamic memory allocation and potential
// bad_alloc.
out.resize(0);
static const char SEP[] = ": ";
static const char ERROR_STR[] = "error ";
// Subtract 2 to account for terminating null characters in SEP and ERROR_STR.
std::size_t error_code_size = sizeof(SEP) + sizeof(ERROR_STR) - 2;
typedef internal::int_traits<int>::main_type main_type;
main_type abs_value = static_cast<main_type>(error_code);
if (internal::is_negative(error_code)) {
abs_value = 0 - abs_value;
++error_code_size;
}
error_code_size += internal::count_digits(abs_value);
writer w(out);
if (message.size() <= inline_buffer_size - error_code_size) {
w.write(message);
w.write(SEP);
}
w.write(ERROR_STR);
w.write(error_code);
assert(out.size() <= inline_buffer_size);
}
void report_error(FormatFunc func, int error_code,
string_view message) FMT_NOEXCEPT {
memory_buffer full_message;
func(full_message, error_code, message);
// Use Writer::data instead of Writer::c_str to avoid potential memory
// allocation.
std::fwrite(full_message.data(), full_message.size(), 1, stderr);
std::fputc('\n', stderr);
}
} // namespace
#if !defined(FMT_STATIC_THOUSANDS_SEPARATOR)
class locale {
private:
std::locale locale_;
public:
explicit locale(std::locale loc = std::locale()) : locale_(loc) {}
std::locale get() { return locale_; }
};
FMT_FUNC size_t internal::count_code_points(u8string_view s) {
const char8_t *data = s.data();
int num_code_points = 0;
for (size_t i = 0, size = s.size(); i != size; ++i) {
if ((data[i].value & 0xc0) != 0x80)
++num_code_points;
}
return num_code_points;
}
template <typename Char>
FMT_FUNC Char internal::thousands_sep(locale_provider *lp) {
std::locale loc = lp ? lp->locale().get() : std::locale();
return std::use_facet<std::numpunct<Char>>(loc).thousands_sep();
}
#else
template <typename Char>
FMT_FUNC Char internal::thousands_sep(locale_provider *lp) {
return FMT_STATIC_THOUSANDS_SEPARATOR;
}
#endif
FMT_FUNC void system_error::init(
int err_code, string_view format_str, format_args args) {
error_code_ = err_code;
memory_buffer buffer;
format_system_error(buffer, err_code, vformat(format_str, args));
std::runtime_error &base = *this;
base = std::runtime_error(to_string(buffer));
}
namespace internal {
template <typename T>
int char_traits<char>::format_float(
char *buffer, std::size_t size, const char *format, int precision, T value) {
return precision < 0 ?
FMT_SNPRINTF(buffer, size, format, value) :
FMT_SNPRINTF(buffer, size, format, precision, value);
}
template <typename T>
int char_traits<wchar_t>::format_float(
wchar_t *buffer, std::size_t size, const wchar_t *format, int precision,
T value) {
return precision < 0 ?
FMT_SWPRINTF(buffer, size, format, value) :
FMT_SWPRINTF(buffer, size, format, precision, value);
}
template <typename T>
const char basic_data<T>::DIGITS[] =
"0001020304050607080910111213141516171819"
"2021222324252627282930313233343536373839"
"4041424344454647484950515253545556575859"
"6061626364656667686970717273747576777879"
"8081828384858687888990919293949596979899";
#define FMT_POWERS_OF_10(factor) \
factor * 10, \
factor * 100, \
factor * 1000, \
factor * 10000, \
factor * 100000, \
factor * 1000000, \
factor * 10000000, \
factor * 100000000, \
factor * 1000000000
template <typename T>
const uint32_t basic_data<T>::POWERS_OF_10_32[] = {
1, FMT_POWERS_OF_10(1)
};
template <typename T>
const uint32_t basic_data<T>::ZERO_OR_POWERS_OF_10_32[] = {
0, FMT_POWERS_OF_10(1)
};
template <typename T>
const uint64_t basic_data<T>::ZERO_OR_POWERS_OF_10_64[] = {
0,
FMT_POWERS_OF_10(1),
FMT_POWERS_OF_10(1000000000ull),
10000000000000000000ull
};
// Normalized 64-bit significands of pow(10, k), for k = -348, -340, ..., 340.
// These are generated by support/compute-powers.py.
template <typename T>
const uint64_t basic_data<T>::POW10_SIGNIFICANDS[] = {
0xfa8fd5a0081c0288, 0xbaaee17fa23ebf76, 0x8b16fb203055ac76,
0xcf42894a5dce35ea, 0x9a6bb0aa55653b2d, 0xe61acf033d1a45df,
0xab70fe17c79ac6ca, 0xff77b1fcbebcdc4f, 0xbe5691ef416bd60c,
0x8dd01fad907ffc3c, 0xd3515c2831559a83, 0x9d71ac8fada6c9b5,
0xea9c227723ee8bcb, 0xaecc49914078536d, 0x823c12795db6ce57,
0xc21094364dfb5637, 0x9096ea6f3848984f, 0xd77485cb25823ac7,
0xa086cfcd97bf97f4, 0xef340a98172aace5, 0xb23867fb2a35b28e,
0x84c8d4dfd2c63f3b, 0xc5dd44271ad3cdba, 0x936b9fcebb25c996,
0xdbac6c247d62a584, 0xa3ab66580d5fdaf6, 0xf3e2f893dec3f126,
0xb5b5ada8aaff80b8, 0x87625f056c7c4a8b, 0xc9bcff6034c13053,
0x964e858c91ba2655, 0xdff9772470297ebd, 0xa6dfbd9fb8e5b88f,
0xf8a95fcf88747d94, 0xb94470938fa89bcf, 0x8a08f0f8bf0f156b,
0xcdb02555653131b6, 0x993fe2c6d07b7fac, 0xe45c10c42a2b3b06,
0xaa242499697392d3, 0xfd87b5f28300ca0e, 0xbce5086492111aeb,
0x8cbccc096f5088cc, 0xd1b71758e219652c, 0x9c40000000000000,
0xe8d4a51000000000, 0xad78ebc5ac620000, 0x813f3978f8940984,
0xc097ce7bc90715b3, 0x8f7e32ce7bea5c70, 0xd5d238a4abe98068,
0x9f4f2726179a2245, 0xed63a231d4c4fb27, 0xb0de65388cc8ada8,
0x83c7088e1aab65db, 0xc45d1df942711d9a, 0x924d692ca61be758,
0xda01ee641a708dea, 0xa26da3999aef774a, 0xf209787bb47d6b85,
0xb454e4a179dd1877, 0x865b86925b9bc5c2, 0xc83553c5c8965d3d,
0x952ab45cfa97a0b3, 0xde469fbd99a05fe3, 0xa59bc234db398c25,
0xf6c69a72a3989f5c, 0xb7dcbf5354e9bece, 0x88fcf317f22241e2,
0xcc20ce9bd35c78a5, 0x98165af37b2153df, 0xe2a0b5dc971f303a,
0xa8d9d1535ce3b396, 0xfb9b7cd9a4a7443c, 0xbb764c4ca7a44410,
0x8bab8eefb6409c1a, 0xd01fef10a657842c, 0x9b10a4e5e9913129,
0xe7109bfba19c0c9d, 0xac2820d9623bf429, 0x80444b5e7aa7cf85,
0xbf21e44003acdd2d, 0x8e679c2f5e44ff8f, 0xd433179d9c8cb841,
0x9e19db92b4e31ba9, 0xeb96bf6ebadf77d9, 0xaf87023b9bf0ee6b,
};
// Binary exponents of pow(10, k), for k = -348, -340, ..., 340, corresponding
// to significands above.
template <typename T>
const int16_t basic_data<T>::POW10_EXPONENTS[] = {
-1220, -1193, -1166, -1140, -1113, -1087, -1060, -1034, -1007, -980, -954,
-927, -901, -874, -847, -821, -794, -768, -741, -715, -688, -661,
-635, -608, -582, -555, -529, -502, -475, -449, -422, -396, -369,
-343, -316, -289, -263, -236, -210, -183, -157, -130, -103, -77,
-50, -24, 3, 30, 56, 83, 109, 136, 162, 189, 216,
242, 269, 295, 322, 348, 375, 402, 428, 455, 481, 508,
534, 561, 588, 614, 641, 667, 694, 720, 747, 774, 800,
827, 853, 880, 907, 933, 960, 986, 1013, 1039, 1066
};
template <typename T> const char basic_data<T>::RESET_COLOR[] = "\x1b[0m";
template <typename T> const wchar_t basic_data<T>::WRESET_COLOR[] = L"\x1b[0m";
// A handmade floating-point number f * pow(2, e).
class fp {
private:
typedef uint64_t significand_type;
// All sizes are in bits.
static FMT_CONSTEXPR_DECL const int char_size =
std::numeric_limits<unsigned char>::digits;
// Subtract 1 to account for an implicit most significant bit in the
// normalized form.
static FMT_CONSTEXPR_DECL const int double_significand_size =
std::numeric_limits<double>::digits - 1;
static FMT_CONSTEXPR_DECL const uint64_t implicit_bit =
1ull << double_significand_size;
public:
significand_type f;
int e;
static FMT_CONSTEXPR_DECL const int significand_size =
sizeof(significand_type) * char_size;
fp(): f(0), e(0) {}
fp(uint64_t f, int e): f(f), e(e) {}
// Constructs fp from an IEEE754 double. It is a template to prevent compile
// errors on platforms where double is not IEEE754.
template <typename Double>
explicit fp(Double d) {
// Assume double is in the format [sign][exponent][significand].
typedef std::numeric_limits<Double> limits;
const int double_size = static_cast<int>(sizeof(Double) * char_size);
const int exponent_size =
double_size - double_significand_size - 1; // -1 for sign
const uint64_t significand_mask = implicit_bit - 1;
const uint64_t exponent_mask = (~0ull >> 1) & ~significand_mask;
const int exponent_bias = (1 << exponent_size) - limits::max_exponent - 1;
auto u = bit_cast<uint64_t>(d);
auto biased_e = (u & exponent_mask) >> double_significand_size;
f = u & significand_mask;
if (biased_e != 0)
f += implicit_bit;
else
biased_e = 1; // Subnormals use biased exponent 1 (min exponent).
e = static_cast<int>(biased_e - exponent_bias - double_significand_size);
}
// Normalizes the value converted from double and multiplied by (1 << SHIFT).
template <int SHIFT = 0>
void normalize() {
// Handle subnormals.
auto shifted_implicit_bit = implicit_bit << SHIFT;
while ((f & shifted_implicit_bit) == 0) {
f <<= 1;
--e;
}
// Subtract 1 to account for hidden bit.
auto offset = significand_size - double_significand_size - SHIFT - 1;
f <<= offset;
e -= offset;
}
// Compute lower and upper boundaries (m^- and m^+ in the Grisu paper), where
// a boundary is a value half way between the number and its predecessor
// (lower) or successor (upper). The upper boundary is normalized and lower
// has the same exponent but may be not normalized.
void compute_boundaries(fp &lower, fp &upper) const {
lower = f == implicit_bit ?
fp((f << 2) - 1, e - 2) : fp((f << 1) - 1, e - 1);
upper = fp((f << 1) + 1, e - 1);
upper.normalize<1>(); // 1 is to account for the exponent shift above.
lower.f <<= lower.e - upper.e;
lower.e = upper.e;
}
};
// Returns an fp number representing x - y. Result may not be normalized.
inline fp operator-(fp x, fp y) {
FMT_ASSERT(x.f >= y.f && x.e == y.e, "invalid operands");
return fp(x.f - y.f, x.e);
}
// Computes an fp number r with r.f = x.f * y.f / pow(2, 64) rounded to nearest
// with half-up tie breaking, r.e = x.e + y.e + 64. Result may not be normalized.
FMT_API fp operator*(fp x, fp y);
// Returns cached power (of 10) c_k = c_k.f * pow(2, c_k.e) such that its
// (binary) exponent satisfies min_exponent <= c_k.e <= min_exponent + 3.
FMT_API fp get_cached_power(int min_exponent, int &pow10_exponent);
FMT_FUNC fp operator*(fp x, fp y) {
// Multiply 32-bit parts of significands.
uint64_t mask = (1ULL << 32) - 1;
uint64_t a = x.f >> 32, b = x.f & mask;
uint64_t c = y.f >> 32, d = y.f & mask;
uint64_t ac = a * c, bc = b * c, ad = a * d, bd = b * d;
// Compute mid 64-bit of result and round.
uint64_t mid = (bd >> 32) + (ad & mask) + (bc & mask) + (1U << 31);
return fp(ac + (ad >> 32) + (bc >> 32) + (mid >> 32), x.e + y.e + 64);
}
FMT_FUNC fp get_cached_power(int min_exponent, int &pow10_exponent) {
const double one_over_log2_10 = 0.30102999566398114; // 1 / log2(10)
int index = static_cast<int>(std::ceil(
(min_exponent + fp::significand_size - 1) * one_over_log2_10));
// Decimal exponent of the first (smallest) cached power of 10.
const int first_dec_exp = -348;
// Difference between 2 consecutive decimal exponents in cached powers of 10.
const int dec_exp_step = 8;
index = (index - first_dec_exp - 1) / dec_exp_step + 1;
pow10_exponent = first_dec_exp + index * dec_exp_step;
return fp(data::POW10_SIGNIFICANDS[index], data::POW10_EXPONENTS[index]);
}
// Generates output using Grisu2 digit-gen algorithm.
FMT_FUNC void grisu2_gen_digits(
const fp &scaled_value, const fp &scaled_upper, uint64_t delta,
char *buffer, size_t &size, int &dec_exp) {
internal::fp one(1ull << -scaled_upper.e, scaled_upper.e);
// hi (p1 in Grisu) contains the most significant digits of scaled_upper.
// hi = floor(scaled_upper / one).
uint32_t hi = static_cast<uint32_t>(scaled_upper.f >> -one.e);
// lo (p2 in Grisu) contains the least significants digits of scaled_upper.
// lo = scaled_upper mod 1.
uint64_t lo = scaled_upper.f & (one.f - 1);
size = 0;
auto exp = count_digits(hi); // kappa in Grisu.
while (exp > 0) {
uint32_t digit = 0;
// This optimization by miloyip reduces the number of integer divisions by
// one per iteration.
switch (exp) {
case 10: digit = hi / 1000000000; hi %= 1000000000; break;
case 9: digit = hi / 100000000; hi %= 100000000; break;
case 8: digit = hi / 10000000; hi %= 10000000; break;
case 7: digit = hi / 1000000; hi %= 1000000; break;
case 6: digit = hi / 100000; hi %= 100000; break;
case 5: digit = hi / 10000; hi %= 10000; break;
case 4: digit = hi / 1000; hi %= 1000; break;
case 3: digit = hi / 100; hi %= 100; break;
case 2: digit = hi / 10; hi %= 10; break;
case 1: digit = hi; hi = 0; break;
default:
FMT_ASSERT(false, "invalid number of digits");
}
if (digit != 0 || size != 0)
buffer[size++] = static_cast<char>('0' + digit);
--exp;
uint64_t remainder = (static_cast<uint64_t>(hi) << -one.e) + lo;
if (remainder <= delta) {
dec_exp += exp;
// TODO: use scaled_value
(void)scaled_value;
return;
}
}
for (;;) {
lo *= 10;
delta *= 10;
char digit = static_cast<char>(lo >> -one.e);
if (digit != 0 || size != 0)
buffer[size++] = static_cast<char>('0' + digit);
lo &= one.f - 1;
--exp;
if (lo < delta) {
dec_exp += exp;
return;
}
}
}
FMT_FUNC void grisu2_format_positive(double value, char *buffer, size_t &size,
int &dec_exp) {
FMT_ASSERT(value > 0, "value is nonpositive");
fp fp_value(value);
fp lower, upper; // w^- and w^+ in the Grisu paper.
fp_value.compute_boundaries(lower, upper);
// Find a cached power of 10 close to 1 / upper.
const int min_exp = -60; // alpha in Grisu.
auto dec_pow = get_cached_power( // \tilde{c}_{-k} in Grisu.
min_exp - (upper.e + fp::significand_size), dec_exp);
dec_exp = -dec_exp;
fp_value.normalize();
fp scaled_value = fp_value * dec_pow;
fp scaled_lower = lower * dec_pow; // \tilde{M}^- in Grisu.
fp scaled_upper = upper * dec_pow; // \tilde{M}^+ in Grisu.
++scaled_lower.f; // \tilde{M}^- + 1 ulp -> M^-_{\uparrow}.
--scaled_upper.f; // \tilde{M}^+ - 1 ulp -> M^+_{\downarrow}.
uint64_t delta = scaled_upper.f - scaled_lower.f;
grisu2_gen_digits(scaled_value, scaled_upper, delta, buffer, size, dec_exp);
}
FMT_FUNC void round(char *buffer, size_t &size, int &exp,
int digits_to_remove) {
size -= to_unsigned(digits_to_remove);
exp += digits_to_remove;
int digit = buffer[size] - '0';
// TODO: proper rounding and carry
if (digit > 5 || (digit == 5 && (digits_to_remove > 1 ||
(buffer[size - 1] - '0') % 2) != 0)) {
++buffer[size - 1];
}
}
// Writes the exponent exp in the form "[+-]d{1,3}" to buffer.
FMT_FUNC char *write_exponent(char *buffer, int exp) {
FMT_ASSERT(-1000 < exp && exp < 1000, "exponent out of range");
if (exp < 0) {
*buffer++ = '-';
exp = -exp;
} else {
*buffer++ = '+';
}
if (exp >= 100) {
*buffer++ = static_cast<char>('0' + exp / 100);
exp %= 100;
const char *d = data::DIGITS + exp * 2;
*buffer++ = d[0];
*buffer++ = d[1];
} else {
const char *d = data::DIGITS + exp * 2;
*buffer++ = d[0];
*buffer++ = d[1];
}
return buffer;
}
FMT_FUNC void format_exp_notation(
char *buffer, size_t &size, int exp, int precision, bool upper) {
// Insert a decimal point after the first digit and add an exponent.
std::memmove(buffer + 2, buffer + 1, size - 1);
buffer[1] = '.';
exp += static_cast<int>(size) - 1;
int num_digits = precision - static_cast<int>(size) + 1;
if (num_digits > 0) {
std::uninitialized_fill_n(buffer + size + 1, num_digits, '0');
size += to_unsigned(num_digits);
} else if (num_digits < 0) {
round(buffer, size, exp, -num_digits);
}
char *p = buffer + size + 1;
*p++ = upper ? 'E' : 'e';
size = to_unsigned(write_exponent(p, exp) - buffer);
}
// Prettifies the output of the Grisu2 algorithm.
// The number is given as v = buffer * 10^exp.
FMT_FUNC void grisu2_prettify(char *buffer, size_t &size, int exp,
int precision, bool upper) {
// pow(10, full_exp - 1) <= v <= pow(10, full_exp).
int int_size = static_cast<int>(size);
int full_exp = int_size + exp;
const int exp_threshold = 21;
if (int_size <= full_exp && full_exp <= exp_threshold) {
// 1234e7 -> 12340000000[.0+]
std::uninitialized_fill_n(buffer + int_size, full_exp - int_size, '0');
char *p = buffer + full_exp;
if (precision > 0) {
*p++ = '.';
std::uninitialized_fill_n(p, precision, '0');
p += precision;
}
size = to_unsigned(p - buffer);
} else if (0 < full_exp && full_exp <= exp_threshold) {
// 1234e-2 -> 12.34[0+]
int fractional_size = -exp;
std::memmove(buffer + full_exp + 1, buffer + full_exp,
to_unsigned(fractional_size));
buffer[full_exp] = '.';
int num_zeros = precision - fractional_size;
if (num_zeros > 0) {
std::uninitialized_fill_n(buffer + size + 1, num_zeros, '0');
size += to_unsigned(num_zeros);
}
++size;
} else if (-6 < full_exp && full_exp <= 0) {
// 1234e-6 -> 0.001234
int offset = 2 - full_exp;
std::memmove(buffer + offset, buffer, size);
buffer[0] = '0';
buffer[1] = '.';
std::uninitialized_fill_n(buffer + 2, -full_exp, '0');
size = to_unsigned(int_size + offset);
} else {
format_exp_notation(buffer, size, exp, precision, upper);
}
}
#if FMT_CLANG_VERSION
# define FMT_FALLTHROUGH [[clang::fallthrough]];
#elif FMT_GCC_VERSION >= 700
# define FMT_FALLTHROUGH [[gnu::fallthrough]];
#else
# define FMT_FALLTHROUGH
#endif
// Formats a nonnegative value using Grisu2 algorithm. Grisu2 doesn't give any
// guarantees on the shortness of the result.
FMT_FUNC void grisu2_format(double value, char *buffer, size_t &size, char type,
int precision, bool write_decimal_point) {
FMT_ASSERT(value >= 0, "value is negative");
int dec_exp = 0; // K in Grisu.
if (value > 0) {
grisu2_format_positive(value, buffer, size, dec_exp);
} else {
*buffer = '0';
size = 1;
}
const int default_precision = 6;
if (precision < 0)
precision = default_precision;
bool upper = false;
switch (type) {
case 'G':
upper = true;
FMT_FALLTHROUGH
case '\0': case 'g': {
int digits_to_remove = static_cast<int>(size) - precision;
if (digits_to_remove > 0) {
round(buffer, size, dec_exp, digits_to_remove);
// Remove trailing zeros.
while (size > 0 && buffer[size - 1] == '0') {
--size;
++dec_exp;
}
}
precision = 0;
break;
}
case 'F':
upper = true;
FMT_FALLTHROUGH
case 'f': {
int digits_to_remove = -dec_exp - precision;
if (digits_to_remove > 0) {
if (digits_to_remove >= static_cast<int>(size))
digits_to_remove = static_cast<int>(size) - 1;
round(buffer, size, dec_exp, digits_to_remove);
}
break;
}
case 'e': case 'E':
format_exp_notation(buffer, size, dec_exp, precision, type == 'E');
return;
}
if (write_decimal_point && precision < 1)
precision = 1;
grisu2_prettify(buffer, size, dec_exp, precision, upper);
}
} // namespace internal
#if FMT_USE_WINDOWS_H
FMT_FUNC internal::utf8_to_utf16::utf8_to_utf16(string_view s) {
static const char ERROR_MSG[] = "cannot convert string from UTF-8 to UTF-16";
if (s.size() > INT_MAX)
FMT_THROW(windows_error(ERROR_INVALID_PARAMETER, ERROR_MSG));
int s_size = static_cast<int>(s.size());
if (s_size == 0) {
// MultiByteToWideChar does not support zero length, handle separately.
buffer_.resize(1);
buffer_[0] = 0;
return;
}
int length = MultiByteToWideChar(
CP_UTF8, MB_ERR_INVALID_CHARS, s.data(), s_size, FMT_NULL, 0);
if (length == 0)
FMT_THROW(windows_error(GetLastError(), ERROR_MSG));
buffer_.resize(length + 1);
length = MultiByteToWideChar(
CP_UTF8, MB_ERR_INVALID_CHARS, s.data(), s_size, &buffer_[0], length);
if (length == 0)
FMT_THROW(windows_error(GetLastError(), ERROR_MSG));
buffer_[length] = 0;
}
FMT_FUNC internal::utf16_to_utf8::utf16_to_utf8(wstring_view s) {
if (int error_code = convert(s)) {
FMT_THROW(windows_error(error_code,
"cannot convert string from UTF-16 to UTF-8"));
}
}
FMT_FUNC int internal::utf16_to_utf8::convert(wstring_view s) {
if (s.size() > INT_MAX)
return ERROR_INVALID_PARAMETER;
int s_size = static_cast<int>(s.size());
if (s_size == 0) {
// WideCharToMultiByte does not support zero length, handle separately.
buffer_.resize(1);
buffer_[0] = 0;
return 0;
}
int length = WideCharToMultiByte(
CP_UTF8, 0, s.data(), s_size, FMT_NULL, 0, FMT_NULL, FMT_NULL);
if (length == 0)
return GetLastError();
buffer_.resize(length + 1);
length = WideCharToMultiByte(
CP_UTF8, 0, s.data(), s_size, &buffer_[0], length, FMT_NULL, FMT_NULL);
if (length == 0)
return GetLastError();
buffer_[length] = 0;
return 0;
}
FMT_FUNC void windows_error::init(
int err_code, string_view format_str, format_args args) {
error_code_ = err_code;
memory_buffer buffer;
internal::format_windows_error(buffer, err_code, vformat(format_str, args));
std::runtime_error &base = *this;
base = std::runtime_error(to_string(buffer));
}
FMT_FUNC void internal::format_windows_error(
internal::buffer &out, int error_code, string_view message) FMT_NOEXCEPT {
FMT_TRY {
wmemory_buffer buf;
buf.resize(inline_buffer_size);
for (;;) {
wchar_t *system_message = &buf[0];
int result = FormatMessageW(
FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_IGNORE_INSERTS,
FMT_NULL, error_code, MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
system_message, static_cast<uint32_t>(buf.size()), FMT_NULL);
if (result != 0) {
utf16_to_utf8 utf8_message;
if (utf8_message.convert(system_message) == ERROR_SUCCESS) {
writer w(out);
w.write(message);
w.write(": ");
w.write(utf8_message);
return;
}
break;
}
if (GetLastError() != ERROR_INSUFFICIENT_BUFFER)
break; // Can't get error message, report error code instead.
buf.resize(buf.size() * 2);
}
} FMT_CATCH(...) {}
format_error_code(out, error_code, message);
}
#endif // FMT_USE_WINDOWS_H
FMT_FUNC void format_system_error(
internal::buffer &out, int error_code, string_view message) FMT_NOEXCEPT {
FMT_TRY {
memory_buffer buf;
buf.resize(inline_buffer_size);
for (;;) {
char *system_message = &buf[0];
int result = safe_strerror(error_code, system_message, buf.size());
if (result == 0) {
writer w(out);
w.write(message);
w.write(": ");
w.write(system_message);
return;
}
if (result != ERANGE)
break; // Can't get error message, report error code instead.
buf.resize(buf.size() * 2);
}
} FMT_CATCH(...) {}
format_error_code(out, error_code, message);
}
template <typename Char>
void basic_fixed_buffer<Char>::grow(std::size_t) {
FMT_THROW(std::runtime_error("buffer overflow"));
}
FMT_FUNC void internal::error_handler::on_error(const char *message) {
FMT_THROW(format_error(message));
}
FMT_FUNC void report_system_error(
int error_code, fmt::string_view message) FMT_NOEXCEPT {
report_error(format_system_error, error_code, message);
}
#if FMT_USE_WINDOWS_H
FMT_FUNC void report_windows_error(
int error_code, fmt::string_view message) FMT_NOEXCEPT {
report_error(internal::format_windows_error, error_code, message);
}
#endif
FMT_FUNC void vprint(std::FILE *f, string_view format_str, format_args args) {
memory_buffer buffer;
vformat_to(buffer, format_str, args);
std::fwrite(buffer.data(), 1, buffer.size(), f);
}
FMT_FUNC void vprint(std::FILE *f, wstring_view format_str, wformat_args args) {
wmemory_buffer buffer;
vformat_to(buffer, format_str, args);
std::fwrite(buffer.data(), sizeof(wchar_t), buffer.size(), f);
}
FMT_FUNC void vprint(string_view format_str, format_args args) {
vprint(stdout, format_str, args);
}
FMT_FUNC void vprint(wstring_view format_str, wformat_args args) {
vprint(stdout, format_str, args);
}
#if !defined(FMT_STATIC_THOUSANDS_SEPARATOR)
FMT_FUNC locale locale_provider::locale() { return fmt::locale(); }
#endif
FMT_END_NAMESPACE
#ifdef _MSC_VER
# pragma warning(pop)
#endif
#endif // FMT_FORMAT_INL_H_

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// Formatting library for C++ - std::ostream support
//
// Copyright (c) 2012 - 2016, Victor Zverovich
// All rights reserved.
//
// For the license information refer to format.h.
#ifndef FMT_OSTREAM_H_
#define FMT_OSTREAM_H_
#include "format.h"
#include <ostream>
FMT_BEGIN_NAMESPACE
namespace internal {
template <class Char>
class formatbuf : public std::basic_streambuf<Char> {
private:
typedef typename std::basic_streambuf<Char>::int_type int_type;
typedef typename std::basic_streambuf<Char>::traits_type traits_type;
basic_buffer<Char> &buffer_;
public:
formatbuf(basic_buffer<Char> &buffer) : buffer_(buffer) {}
protected:
// The put-area is actually always empty. This makes the implementation
// simpler and has the advantage that the streambuf and the buffer are always
// in sync and sputc never writes into uninitialized memory. The obvious
// disadvantage is that each call to sputc always results in a (virtual) call
// to overflow. There is no disadvantage here for sputn since this always
// results in a call to xsputn.
int_type overflow(int_type ch = traits_type::eof()) FMT_OVERRIDE {
if (!traits_type::eq_int_type(ch, traits_type::eof()))
buffer_.push_back(static_cast<Char>(ch));
return ch;
}
std::streamsize xsputn(const Char *s, std::streamsize count) FMT_OVERRIDE {
buffer_.append(s, s + count);
return count;
}
};
template <typename Char>
struct test_stream : std::basic_ostream<Char> {
private:
struct null;
// Hide all operator<< from std::basic_ostream<Char>.
void operator<<(null);
};
// Checks if T has a user-defined operator<< (e.g. not a member of std::ostream).
template <typename T, typename Char>
class is_streamable {
private:
template <typename U>
static decltype(
internal::declval<test_stream<Char>&>()
<< internal::declval<U>(), std::true_type()) test(int);
template <typename>
static std::false_type test(...);
typedef decltype(test<T>(0)) result;
public:
static const bool value = result::value;
};
// Write the content of buf to os.
template <typename Char>
void write(std::basic_ostream<Char> &os, basic_buffer<Char> &buf) {
const Char *data = buf.data();
typedef std::make_unsigned<std::streamsize>::type UnsignedStreamSize;
UnsignedStreamSize size = buf.size();
UnsignedStreamSize max_size =
internal::to_unsigned((std::numeric_limits<std::streamsize>::max)());
do {
UnsignedStreamSize n = size <= max_size ? size : max_size;
os.write(data, static_cast<std::streamsize>(n));
data += n;
size -= n;
} while (size != 0);
}
template <typename Char, typename T>
void format_value(basic_buffer<Char> &buffer, const T &value) {
internal::formatbuf<Char> format_buf(buffer);
std::basic_ostream<Char> output(&format_buf);
output.exceptions(std::ios_base::failbit | std::ios_base::badbit);
output << value;
buffer.resize(buffer.size());
}
} // namespace internal
// Disable conversion to int if T has an overloaded operator<< which is a free
// function (not a member of std::ostream).
template <typename T, typename Char>
struct convert_to_int<T, Char, void> {
static const bool value =
convert_to_int<T, Char, int>::value &&
!internal::is_streamable<T, Char>::value;
};
// Formats an object of type T that has an overloaded ostream operator<<.
template <typename T, typename Char>
struct formatter<T, Char,
typename std::enable_if<
internal::is_streamable<T, Char>::value &&
!internal::format_type<
typename buffer_context<Char>::type, T>::value>::type>
: formatter<basic_string_view<Char>, Char> {
template <typename Context>
auto format(const T &value, Context &ctx) -> decltype(ctx.out()) {
basic_memory_buffer<Char> buffer;
internal::format_value(buffer, value);
basic_string_view<Char> str(buffer.data(), buffer.size());
return formatter<basic_string_view<Char>, Char>::format(str, ctx);
}
};
template <typename Char>
inline void vprint(std::basic_ostream<Char> &os,
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);
internal::write(os, buffer);
}
/**
\rst
Prints formatted data to the stream *os*.
**Example**::
fmt::print(cerr, "Don't {}!", "panic");
\endrst
*/
template <typename... Args>
inline void print(std::ostream &os, string_view format_str,
const Args & ... args) {
vprint<char>(os, format_str, make_format_args<format_context>(args...));
}
template <typename... Args>
inline void print(std::wostream &os, wstring_view format_str,
const Args & ... args) {
vprint<wchar_t>(os, format_str, make_format_args<wformat_context>(args...));
}
FMT_END_NAMESPACE
#endif // FMT_OSTREAM_H_

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// A C++ interface to POSIX functions.
//
// Copyright (c) 2012 - 2016, Victor Zverovich
// All rights reserved.
//
// For the license information refer to format.h.
#ifndef FMT_POSIX_H_
#define FMT_POSIX_H_
#if defined(__MINGW32__) || defined(__CYGWIN__)
// Workaround MinGW bug https://sourceforge.net/p/mingw/bugs/2024/.
# undef __STRICT_ANSI__
#endif
#include <errno.h>
#include <fcntl.h> // for O_RDONLY
#include <locale.h> // for locale_t
#include <stdio.h>
#include <stdlib.h> // for strtod_l
#include <cstddef>
#if defined __APPLE__ || defined(__FreeBSD__)
# include <xlocale.h> // for LC_NUMERIC_MASK on OS X
#endif
#include "format.h"
#ifndef FMT_POSIX
# if defined(_WIN32) && !defined(__MINGW32__)
// Fix warnings about deprecated symbols.
# define FMT_POSIX(call) _##call
# else
# define FMT_POSIX(call) call
# endif
#endif
// Calls to system functions are wrapped in FMT_SYSTEM for testability.
#ifdef FMT_SYSTEM
# define FMT_POSIX_CALL(call) FMT_SYSTEM(call)
#else
# define FMT_SYSTEM(call) call
# ifdef _WIN32
// Fix warnings about deprecated symbols.
# define FMT_POSIX_CALL(call) ::_##call
# else
# define FMT_POSIX_CALL(call) ::call
# endif
#endif
// Retries the expression while it evaluates to error_result and errno
// equals to EINTR.
#ifndef _WIN32
# define FMT_RETRY_VAL(result, expression, error_result) \
do { \
result = (expression); \
} while (result == error_result && errno == EINTR)
#else
# define FMT_RETRY_VAL(result, expression, error_result) result = (expression)
#endif
#define FMT_RETRY(result, expression) FMT_RETRY_VAL(result, expression, -1)
FMT_BEGIN_NAMESPACE
/**
\rst
A reference to a null-terminated string. It can be constructed from a C
string or ``std::string``.
You can use one of the following typedefs for common character types:
+---------------+-----------------------------+
| Type | Definition |
+===============+=============================+
| cstring_view | basic_cstring_view<char> |
+---------------+-----------------------------+
| wcstring_view | basic_cstring_view<wchar_t> |
+---------------+-----------------------------+
This class is most useful as a parameter type to allow passing
different types of strings to a function, for example::
template <typename... Args>
std::string format(cstring_view format_str, const Args & ... args);
format("{}", 42);
format(std::string("{}"), 42);
\endrst
*/
template <typename Char>
class basic_cstring_view {
private:
const Char *data_;
public:
/** Constructs a string reference object from a C string. */
basic_cstring_view(const Char *s) : data_(s) {}
/**
\rst
Constructs a string reference from an ``std::string`` object.
\endrst
*/
basic_cstring_view(const std::basic_string<Char> &s) : data_(s.c_str()) {}
/** Returns the pointer to a C string. */
const Char *c_str() const { return data_; }
};
typedef basic_cstring_view<char> cstring_view;
typedef basic_cstring_view<wchar_t> wcstring_view;
// An error code.
class error_code {
private:
int value_;
public:
explicit error_code(int value = 0) FMT_NOEXCEPT : value_(value) {}
int get() const FMT_NOEXCEPT { return value_; }
};
// A buffered file.
class buffered_file {
private:
FILE *file_;
friend class file;
explicit buffered_file(FILE *f) : file_(f) {}
public:
// Constructs a buffered_file object which doesn't represent any file.
buffered_file() FMT_NOEXCEPT : file_(FMT_NULL) {}
// Destroys the object closing the file it represents if any.
FMT_API ~buffered_file() FMT_DTOR_NOEXCEPT;
private:
buffered_file(const buffered_file &) = delete;
void operator=(const buffered_file &) = delete;
public:
buffered_file(buffered_file &&other) FMT_NOEXCEPT : file_(other.file_) {
other.file_ = FMT_NULL;
}
buffered_file& operator=(buffered_file &&other) {
close();
file_ = other.file_;
other.file_ = FMT_NULL;
return *this;
}
// Opens a file.
FMT_API buffered_file(cstring_view filename, cstring_view mode);
// Closes the file.
FMT_API void close();
// Returns the pointer to a FILE object representing this file.
FILE *get() const FMT_NOEXCEPT { return file_; }
// We place parentheses around fileno to workaround a bug in some versions
// of MinGW that define fileno as a macro.
FMT_API int (fileno)() const;
void vprint(string_view format_str, format_args args) {
fmt::vprint(file_, format_str, args);
}
template <typename... Args>
inline void print(string_view format_str, const Args & ... args) {
vprint(format_str, make_format_args(args...));
}
};
// A file. Closed file is represented by a file object with descriptor -1.
// Methods that are not declared with FMT_NOEXCEPT may throw
// fmt::system_error in case of failure. Note that some errors such as
// closing the file multiple times will cause a crash on Windows rather
// than an exception. You can get standard behavior by overriding the
// invalid parameter handler with _set_invalid_parameter_handler.
class file {
private:
int fd_; // File descriptor.
// Constructs a file object with a given descriptor.
explicit file(int fd) : fd_(fd) {}
public:
// Possible values for the oflag argument to the constructor.
enum {
RDONLY = FMT_POSIX(O_RDONLY), // Open for reading only.
WRONLY = FMT_POSIX(O_WRONLY), // Open for writing only.
RDWR = FMT_POSIX(O_RDWR) // Open for reading and writing.
};
// Constructs a file object which doesn't represent any file.
file() FMT_NOEXCEPT : fd_(-1) {}
// Opens a file and constructs a file object representing this file.
FMT_API file(cstring_view path, int oflag);
private:
file(const file &) = delete;
void operator=(const file &) = delete;
public:
file(file &&other) FMT_NOEXCEPT : fd_(other.fd_) {
other.fd_ = -1;
}
file& operator=(file &&other) {
close();
fd_ = other.fd_;
other.fd_ = -1;
return *this;
}
// Destroys the object closing the file it represents if any.
FMT_API ~file() FMT_DTOR_NOEXCEPT;
// Returns the file descriptor.
int descriptor() const FMT_NOEXCEPT { return fd_; }
// Closes the file.
FMT_API void close();
// Returns the file size. The size has signed type for consistency with
// stat::st_size.
FMT_API long long size() const;
// Attempts to read count bytes from the file into the specified buffer.
FMT_API std::size_t read(void *buffer, std::size_t count);
// Attempts to write count bytes from the specified buffer to the file.
FMT_API std::size_t write(const void *buffer, std::size_t count);
// Duplicates a file descriptor with the dup function and returns
// the duplicate as a file object.
FMT_API static file dup(int fd);
// Makes fd be the copy of this file descriptor, closing fd first if
// necessary.
FMT_API void dup2(int fd);
// Makes fd be the copy of this file descriptor, closing fd first if
// necessary.
FMT_API void dup2(int fd, error_code &ec) FMT_NOEXCEPT;
// Creates a pipe setting up read_end and write_end file objects for reading
// and writing respectively.
FMT_API static void pipe(file &read_end, file &write_end);
// Creates a buffered_file object associated with this file and detaches
// this file object from the file.
FMT_API buffered_file fdopen(const char *mode);
};
// Returns the memory page size.
long getpagesize();
#if (defined(LC_NUMERIC_MASK) || defined(_MSC_VER)) && \
!defined(__ANDROID__) && !defined(__CYGWIN__) && !defined(__OpenBSD__) && \
!defined(__NEWLIB_H__)
# define FMT_LOCALE
#endif
#ifdef FMT_LOCALE
// A "C" numeric locale.
class Locale {
private:
# ifdef _MSC_VER
typedef _locale_t locale_t;
enum { LC_NUMERIC_MASK = LC_NUMERIC };
static locale_t newlocale(int category_mask, const char *locale, locale_t) {
return _create_locale(category_mask, locale);
}
static void freelocale(locale_t locale) {
_free_locale(locale);
}
static double strtod_l(const char *nptr, char **endptr, _locale_t locale) {
return _strtod_l(nptr, endptr, locale);
}
# endif
locale_t locale_;
Locale(const Locale &) = delete;
void operator=(const Locale &) = delete;
public:
typedef locale_t Type;
Locale() : locale_(newlocale(LC_NUMERIC_MASK, "C", FMT_NULL)) {
if (!locale_)
FMT_THROW(system_error(errno, "cannot create locale"));
}
~Locale() { freelocale(locale_); }
Type get() const { return locale_; }
// Converts string to floating-point number and advances str past the end
// of the parsed input.
double strtod(const char *&str) const {
char *end = FMT_NULL;
double result = strtod_l(str, &end, locale_);
str = end;
return result;
}
};
#endif // FMT_LOCALE
FMT_END_NAMESPACE
#endif // FMT_POSIX_H_

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dep/fmt/fmt/printf.h Normal file
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@@ -0,0 +1,726 @@
// Formatting library for C++
//
// Copyright (c) 2012 - 2016, Victor Zverovich
// All rights reserved.
//
// For the license information refer to format.h.
#ifndef FMT_PRINTF_H_
#define FMT_PRINTF_H_
#include <algorithm> // std::fill_n
#include <limits> // std::numeric_limits
#include "ostream.h"
FMT_BEGIN_NAMESPACE
namespace internal {
// Checks if a value fits in int - used to avoid warnings about comparing
// signed and unsigned integers.
template <bool IsSigned>
struct int_checker {
template <typename T>
static bool fits_in_int(T value) {
unsigned max = std::numeric_limits<int>::max();
return value <= max;
}
static bool fits_in_int(bool) { return true; }
};
template <>
struct int_checker<true> {
template <typename T>
static bool fits_in_int(T value) {
return value >= std::numeric_limits<int>::min() &&
value <= std::numeric_limits<int>::max();
}
static bool fits_in_int(int) { return true; }
};
class printf_precision_handler: public function<int> {
public:
template <typename T>
typename std::enable_if<std::is_integral<T>::value, int>::type
operator()(T value) {
if (!int_checker<std::numeric_limits<T>::is_signed>::fits_in_int(value))
FMT_THROW(format_error("number is too big"));
return static_cast<int>(value);
}
template <typename T>
typename std::enable_if<!std::is_integral<T>::value, int>::type operator()(T) {
FMT_THROW(format_error("precision is not integer"));
return 0;
}
};
// An argument visitor that returns true iff arg is a zero integer.
class is_zero_int: public function<bool> {
public:
template <typename T>
typename std::enable_if<std::is_integral<T>::value, bool>::type
operator()(T value) { return value == 0; }
template <typename T>
typename std::enable_if<!std::is_integral<T>::value, bool>::type
operator()(T) { return false; }
};
template <typename T>
struct make_unsigned_or_bool : std::make_unsigned<T> {};
template <>
struct make_unsigned_or_bool<bool> {
typedef bool type;
};
template <typename T, typename Context>
class arg_converter: public function<void> {
private:
typedef typename Context::char_type Char;
basic_format_arg<Context> &arg_;
typename Context::char_type type_;
public:
arg_converter(basic_format_arg<Context> &arg, Char type)
: arg_(arg), type_(type) {}
void operator()(bool value) {
if (type_ != 's')
operator()<bool>(value);
}
template <typename U>
typename std::enable_if<std::is_integral<U>::value>::type
operator()(U value) {
bool is_signed = type_ == 'd' || type_ == 'i';
typedef typename std::conditional<
std::is_same<T, void>::value, U, T>::type TargetType;
if (const_check(sizeof(TargetType) <= sizeof(int))) {
// Extra casts are used to silence warnings.
if (is_signed) {
arg_ = internal::make_arg<Context>(
static_cast<int>(static_cast<TargetType>(value)));
} else {
typedef typename make_unsigned_or_bool<TargetType>::type Unsigned;
arg_ = internal::make_arg<Context>(
static_cast<unsigned>(static_cast<Unsigned>(value)));
}
} else {
if (is_signed) {
// glibc's printf doesn't sign extend arguments of smaller types:
// std::printf("%lld", -42); // prints "4294967254"
// but we don't have to do the same because it's a UB.
arg_ = internal::make_arg<Context>(static_cast<long long>(value));
} else {
arg_ = internal::make_arg<Context>(
static_cast<typename make_unsigned_or_bool<U>::type>(value));
}
}
}
template <typename U>
typename std::enable_if<!std::is_integral<U>::value>::type operator()(U) {
// No coversion needed for non-integral types.
}
};
// Converts an integer argument to T for printf, if T is an integral type.
// If T is void, the argument is converted to corresponding signed or unsigned
// type depending on the type specifier: 'd' and 'i' - signed, other -
// unsigned).
template <typename T, typename Context, typename Char>
void convert_arg(basic_format_arg<Context> &arg, Char type) {
fmt::visit(arg_converter<T, Context>(arg, type), arg);
}
// Converts an integer argument to char for printf.
template <typename Context>
class char_converter: public function<void> {
private:
basic_format_arg<Context> &arg_;
public:
explicit char_converter(basic_format_arg<Context> &arg) : arg_(arg) {}
template <typename T>
typename std::enable_if<std::is_integral<T>::value>::type
operator()(T value) {
typedef typename Context::char_type Char;
arg_ = internal::make_arg<Context>(static_cast<Char>(value));
}
template <typename T>
typename std::enable_if<!std::is_integral<T>::value>::type operator()(T) {
// No coversion needed for non-integral types.
}
};
// Checks if an argument is a valid printf width specifier and sets
// left alignment if it is negative.
template <typename Char>
class printf_width_handler: public function<unsigned> {
private:
typedef basic_format_specs<Char> format_specs;
format_specs &spec_;
public:
explicit printf_width_handler(format_specs &spec) : spec_(spec) {}
template <typename T>
typename std::enable_if<std::is_integral<T>::value, unsigned>::type
operator()(T value) {
typedef typename internal::int_traits<T>::main_type UnsignedType;
UnsignedType width = static_cast<UnsignedType>(value);
if (internal::is_negative(value)) {
spec_.align_ = ALIGN_LEFT;
width = 0 - width;
}
unsigned int_max = std::numeric_limits<int>::max();
if (width > int_max)
FMT_THROW(format_error("number is too big"));
return static_cast<unsigned>(width);
}
template <typename T>
typename std::enable_if<!std::is_integral<T>::value, unsigned>::type
operator()(T) {
FMT_THROW(format_error("width is not integer"));
return 0;
}
};
} // namespace internal
template <typename Range>
class printf_arg_formatter;
template <
typename OutputIt, typename Char,
typename ArgFormatter =
printf_arg_formatter<back_insert_range<internal::basic_buffer<Char>>>>
class basic_printf_context;
/**
\rst
The ``printf`` argument formatter.
\endrst
*/
template <typename Range>
class printf_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 decltype(internal::declval<Range>().begin()) iterator;
typedef internal::arg_formatter_base<Range> base;
typedef basic_printf_context<iterator, char_type> context_type;
context_type &context_;
void write_null_pointer(char) {
this->spec()->type_ = 0;
this->write("(nil)");
}
void write_null_pointer(wchar_t) {
this->spec()->type_ = 0;
this->write(L"(nil)");
}
public:
typedef typename base::format_specs format_specs;
/**
\rst
Constructs an argument formatter object.
*buffer* is a reference to the output buffer and *spec* contains format
specifier information for standard argument types.
\endrst
*/
printf_arg_formatter(internal::basic_buffer<char_type> &buffer,
format_specs &spec, context_type &ctx)
: base(back_insert_range<internal::basic_buffer<char_type>>(buffer), &spec),
context_(ctx) {}
template <typename T>
typename std::enable_if<std::is_integral<T>::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) {
format_specs &fmt_spec = *this->spec();
if (fmt_spec.type_ != 's')
return base::operator()(value ? 1 : 0);
fmt_spec.type_ = 0;
this->write(value != 0);
} else if (std::is_same<T, char_type>::value) {
format_specs &fmt_spec = *this->spec();
if (fmt_spec.type_ && fmt_spec.type_ != 'c')
return (*this)(static_cast<int>(value));
fmt_spec.flags_ = 0;
fmt_spec.align_ = ALIGN_RIGHT;
return base::operator()(value);
} else {
return base::operator()(value);
}
return this->out();
}
template <typename T>
typename std::enable_if<std::is_floating_point<T>::value, iterator>::type
operator()(T value) {
return base::operator()(value);
}
/** Formats a null-terminated C string. */
iterator operator()(const char *value) {
if (value)
base::operator()(value);
else if (this->spec()->type_ == 'p')
write_null_pointer(char_type());
else
this->write("(null)");
return this->out();
}
/** Formats a null-terminated wide C string. */
iterator operator()(const wchar_t *value) {
if (value)
base::operator()(value);
else if (this->spec()->type_ == 'p')
write_null_pointer(char_type());
else
this->write(L"(null)");
return this->out();
}
iterator operator()(basic_string_view<char_type> value) {
return base::operator()(value);
}
iterator operator()(monostate value) {
return base::operator()(value);
}
/** Formats a pointer. */
iterator operator()(const void *value) {
if (value)
return base::operator()(value);
this->spec()->type_ = 0;
write_null_pointer(char_type());
return this->out();
}
/** Formats an argument of a custom (user-defined) type. */
iterator operator()(typename basic_format_arg<context_type>::handle handle) {
handle.format(context_);
return this->out();
}
};
template <typename T>
struct printf_formatter {
template <typename ParseContext>
auto parse(ParseContext &ctx) -> decltype(ctx.begin()) { return ctx.begin(); }
template <typename FormatContext>
auto format(const T &value, FormatContext &ctx) -> decltype(ctx.out()) {
internal::format_value(internal::get_container(ctx.out()), value);
return ctx.out();
}
};
/** This template formats data and writes the output to a writer. */
template <typename OutputIt, typename Char, typename ArgFormatter>
class basic_printf_context :
// Inherit publicly as a workaround for the icc bug
// https://software.intel.com/en-us/forums/intel-c-compiler/topic/783476.
public internal::context_base<
OutputIt, basic_printf_context<OutputIt, Char, ArgFormatter>, Char> {
public:
/** The character type for the output. */
typedef Char char_type;
template <typename T>
struct formatter_type { typedef printf_formatter<T> type; };
private:
typedef internal::context_base<OutputIt, basic_printf_context, Char> base;
typedef typename base::format_arg format_arg;
typedef basic_format_specs<char_type> format_specs;
typedef internal::null_terminating_iterator<char_type> iterator;
void parse_flags(format_specs &spec, iterator &it);
// Returns the argument with specified index or, if arg_index is equal
// to the maximum unsigned value, the next argument.
format_arg get_arg(
iterator it,
unsigned arg_index = (std::numeric_limits<unsigned>::max)());
// Parses argument index, flags and width and returns the argument index.
unsigned parse_header(iterator &it, format_specs &spec);
public:
/**
\rst
Constructs a ``printf_context`` object. References to the arguments and
the writer are stored in the context object so make sure they have
appropriate lifetimes.
\endrst
*/
basic_printf_context(OutputIt out, basic_string_view<char_type> format_str,
basic_format_args<basic_printf_context> args)
: base(out, format_str, args) {}
using base::parse_context;
using base::out;
using base::advance_to;
/** Formats stored arguments and writes the output to the range. */
void format();
};
template <typename OutputIt, typename Char, typename AF>
void basic_printf_context<OutputIt, Char, AF>::parse_flags(
format_specs &spec, iterator &it) {
for (;;) {
switch (*it++) {
case '-':
spec.align_ = ALIGN_LEFT;
break;
case '+':
spec.flags_ |= SIGN_FLAG | PLUS_FLAG;
break;
case '0':
spec.fill_ = '0';
break;
case ' ':
spec.flags_ |= SIGN_FLAG;
break;
case '#':
spec.flags_ |= HASH_FLAG;
break;
default:
--it;
return;
}
}
}
template <typename OutputIt, typename Char, typename AF>
typename basic_printf_context<OutputIt, Char, AF>::format_arg
basic_printf_context<OutputIt, Char, AF>::get_arg(
iterator it, unsigned arg_index) {
(void)it;
if (arg_index == std::numeric_limits<unsigned>::max())
return this->do_get_arg(this->parse_context().next_arg_id());
return base::get_arg(arg_index - 1);
}
template <typename OutputIt, typename Char, typename AF>
unsigned basic_printf_context<OutputIt, Char, AF>::parse_header(
iterator &it, format_specs &spec) {
unsigned arg_index = std::numeric_limits<unsigned>::max();
char_type c = *it;
if (c >= '0' && c <= '9') {
// Parse an argument index (if followed by '$') or a width possibly
// preceded with '0' flag(s).
internal::error_handler eh;
unsigned value = parse_nonnegative_int(it, eh);
if (*it == '$') { // value is an argument index
++it;
arg_index = value;
} else {
if (c == '0')
spec.fill_ = '0';
if (value != 0) {
// Nonzero value means that we parsed width and don't need to
// parse it or flags again, so return now.
spec.width_ = value;
return arg_index;
}
}
}
parse_flags(spec, it);
// Parse width.
if (*it >= '0' && *it <= '9') {
internal::error_handler eh;
spec.width_ = parse_nonnegative_int(it, eh);
} else if (*it == '*') {
++it;
spec.width_ =
fmt::visit(internal::printf_width_handler<char_type>(spec), get_arg(it));
}
return arg_index;
}
template <typename OutputIt, typename Char, typename AF>
void basic_printf_context<OutputIt, Char, AF>::format() {
auto &buffer = internal::get_container(this->out());
auto start = iterator(this->parse_context());
auto it = start;
using internal::pointer_from;
while (*it) {
char_type c = *it++;
if (c != '%') continue;
if (*it == c) {
buffer.append(pointer_from(start), pointer_from(it));
start = ++it;
continue;
}
buffer.append(pointer_from(start), pointer_from(it) - 1);
format_specs spec;
spec.align_ = ALIGN_RIGHT;
// Parse argument index, flags and width.
unsigned arg_index = parse_header(it, spec);
// Parse precision.
if (*it == '.') {
++it;
if ('0' <= *it && *it <= '9') {
internal::error_handler eh;
spec.precision_ = static_cast<int>(parse_nonnegative_int(it, eh));
} else if (*it == '*') {
++it;
spec.precision_ =
fmt::visit(internal::printf_precision_handler(), get_arg(it));
} else {
spec.precision_ = 0;
}
}
format_arg arg = get_arg(it, arg_index);
if (spec.flag(HASH_FLAG) && fmt::visit(internal::is_zero_int(), arg))
spec.flags_ &= ~internal::to_unsigned<int>(HASH_FLAG);
if (spec.fill_ == '0') {
if (arg.is_arithmetic())
spec.align_ = ALIGN_NUMERIC;
else
spec.fill_ = ' '; // Ignore '0' flag for non-numeric types.
}
// Parse length and convert the argument to the required type.
using internal::convert_arg;
switch (*it++) {
case 'h':
if (*it == 'h')
convert_arg<signed char>(arg, *++it);
else
convert_arg<short>(arg, *it);
break;
case 'l':
if (*it == 'l')
convert_arg<long long>(arg, *++it);
else
convert_arg<long>(arg, *it);
break;
case 'j':
convert_arg<intmax_t>(arg, *it);
break;
case 'z':
convert_arg<std::size_t>(arg, *it);
break;
case 't':
convert_arg<std::ptrdiff_t>(arg, *it);
break;
case 'L':
// printf produces garbage when 'L' is omitted for long double, no
// need to do the same.
break;
default:
--it;
convert_arg<void>(arg, *it);
}
// Parse type.
if (!*it)
FMT_THROW(format_error("invalid format string"));
spec.type_ = static_cast<char>(*it++);
if (arg.is_integral()) {
// Normalize type.
switch (spec.type_) {
case 'i': case 'u':
spec.type_ = 'd';
break;
case 'c':
// TODO: handle wchar_t better?
fmt::visit(internal::char_converter<basic_printf_context>(arg), arg);
break;
}
}
start = it;
// Format argument.
fmt::visit(AF(buffer, spec, *this), arg);
}
buffer.append(pointer_from(start), pointer_from(it));
}
template <typename Char, typename Context>
void printf(internal::basic_buffer<Char> &buf, basic_string_view<Char> format,
basic_format_args<Context> args) {
Context(std::back_inserter(buf), format, args).format();
}
template <typename Buffer>
struct printf_context {
typedef basic_printf_context<
std::back_insert_iterator<Buffer>, typename Buffer::value_type> type;
};
template <typename ...Args>
inline format_arg_store<printf_context<internal::buffer>::type, Args...>
make_printf_args(const Args & ... args) {
return format_arg_store<printf_context<internal::buffer>::type, Args...>(
args...);
}
typedef basic_format_args<printf_context<internal::buffer>::type> printf_args;
typedef basic_format_args<printf_context<internal::wbuffer>::type> wprintf_args;
inline std::string vsprintf(string_view format, printf_args args) {
memory_buffer buffer;
printf(buffer, format, args);
return to_string(buffer);
}
/**
\rst
Formats arguments and returns the result as a string.
**Example**::
std::string message = fmt::sprintf("The answer is %d", 42);
\endrst
*/
template <typename... Args>
inline std::string sprintf(string_view format_str, const Args & ... args) {
return vsprintf(format_str,
make_format_args<typename printf_context<internal::buffer>::type>(args...));
}
inline std::wstring vsprintf(wstring_view format, wprintf_args args) {
wmemory_buffer buffer;
printf(buffer, format, args);
return to_string(buffer);
}
template <typename... Args>
inline std::wstring sprintf(wstring_view format_str, const Args & ... args) {
return vsprintf(format_str,
make_format_args<typename printf_context<internal::wbuffer>::type>(args...));
}
template <typename Char>
inline int vfprintf(std::FILE *f, basic_string_view<Char> format,
basic_format_args<typename printf_context<
internal::basic_buffer<Char>>::type> args) {
basic_memory_buffer<Char> buffer;
printf(buffer, format, args);
std::size_t size = buffer.size();
return std::fwrite(
buffer.data(), sizeof(Char), size, f) < size ? -1 : static_cast<int>(size);
}
/**
\rst
Prints formatted data to the file *f*.
**Example**::
fmt::fprintf(stderr, "Don't %s!", "panic");
\endrst
*/
template <typename... Args>
inline int fprintf(std::FILE *f, string_view format_str, const Args & ... args) {
auto vargs = make_format_args<
typename printf_context<internal::buffer>::type>(args...);
return vfprintf<char>(f, format_str, vargs);
}
template <typename... Args>
inline int fprintf(std::FILE *f, wstring_view format_str,
const Args & ... args) {
return vfprintf(f, format_str,
make_format_args<typename printf_context<internal::wbuffer>::type>(args...));
}
inline int vprintf(string_view format, printf_args args) {
return vfprintf(stdout, format, args);
}
inline int vprintf(wstring_view format, wprintf_args args) {
return vfprintf(stdout, format, args);
}
/**
\rst
Prints formatted data to ``stdout``.
**Example**::
fmt::printf("Elapsed time: %.2f seconds", 1.23);
\endrst
*/
template <typename... Args>
inline int printf(string_view format_str, const Args & ... args) {
return vprintf(format_str,
make_format_args<typename printf_context<internal::buffer>::type>(args...));
}
template <typename... Args>
inline int printf(wstring_view format_str, const Args & ... args) {
return vprintf(format_str,
make_format_args<typename printf_context<internal::wbuffer>::type>(args...));
}
inline int vfprintf(std::ostream &os, string_view format_str,
printf_args args) {
memory_buffer buffer;
printf(buffer, format_str, args);
internal::write(os, buffer);
return static_cast<int>(buffer.size());
}
inline int vfprintf(std::wostream &os, wstring_view format_str,
wprintf_args args) {
wmemory_buffer buffer;
printf(buffer, format_str, args);
internal::write(os, buffer);
return static_cast<int>(buffer.size());
}
/**
\rst
Prints formatted data to the stream *os*.
**Example**::
fmt::fprintf(cerr, "Don't %s!", "panic");
\endrst
*/
template <typename... Args>
inline int fprintf(std::ostream &os, string_view format_str,
const Args & ... args) {
auto vargs = make_format_args<
typename printf_context<internal::buffer>::type>(args...);
return vfprintf(os, format_str, vargs);
}
template <typename... Args>
inline int fprintf(std::wostream &os, wstring_view format_str,
const Args & ... args) {
auto vargs = make_format_args<
typename printf_context<internal::buffer>::type>(args...);
return vfprintf(os, format_str, vargs);
}
FMT_END_NAMESPACE
#endif // FMT_PRINTF_H_

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// Formatting library for C++ - the core API
//
// Copyright (c) 2012 - present, Victor Zverovich
// All rights reserved.
//
// For the license information refer to format.h.
//
// Copyright (c) 2018 - present, Remotion (Igor Schulz)
// All Rights Reserved
// {fmt} support for ranges, containers and types tuple interface.
#ifndef FMT_RANGES_H_
#define FMT_RANGES_H_
#include "format.h"
#include <type_traits>
// output only up to N items from the range.
#ifndef FMT_RANGE_OUTPUT_LENGTH_LIMIT
# define FMT_RANGE_OUTPUT_LENGTH_LIMIT 256
#endif
FMT_BEGIN_NAMESPACE
template <typename Char>
struct formatting_base {
template <typename ParseContext>
FMT_CONSTEXPR auto parse(ParseContext &ctx) -> decltype(ctx.begin()) {
return ctx.begin();
}
};
template <typename Char, typename Enable = void>
struct formatting_range : formatting_base<Char> {
static FMT_CONSTEXPR_DECL const std::size_t range_length_limit =
FMT_RANGE_OUTPUT_LENGTH_LIMIT; // output only up to N items from the range.
Char prefix;
Char delimiter;
Char postfix;
formatting_range() : prefix('{'), delimiter(','), postfix('}') {}
static FMT_CONSTEXPR_DECL const bool add_delimiter_spaces = true;
static FMT_CONSTEXPR_DECL const bool add_prepostfix_space = false;
};
template <typename Char, typename Enable = void>
struct formatting_tuple : formatting_base<Char> {
Char prefix;
Char delimiter;
Char postfix;
formatting_tuple() : prefix('('), delimiter(','), postfix(')') {}
static FMT_CONSTEXPR_DECL const bool add_delimiter_spaces = true;
static FMT_CONSTEXPR_DECL const bool add_prepostfix_space = false;
};
namespace internal {
template <typename RangeT, typename OutputIterator>
void copy(const RangeT &range, OutputIterator out) {
for (auto it = range.begin(), end = range.end(); it != end; ++it)
*out++ = *it;
}
template <typename OutputIterator>
void copy(const char *str, OutputIterator out) {
const char *p_curr = str;
while (*p_curr) {
*out++ = *p_curr++;
}
}
template <typename OutputIterator>
void copy(char ch, OutputIterator out) {
*out++ = ch;
}
/// Return true value if T has std::string interface, like std::string_view.
template <typename T>
class is_like_std_string {
template <typename U>
static auto check(U *p) ->
decltype(p->find('a'), p->length(), p->data(), int());
template <typename>
static void check(...);
public:
static FMT_CONSTEXPR_DECL const bool value =
!std::is_void<decltype(check<T>(FMT_NULL))>::value;
};
template <typename Char>
struct is_like_std_string<fmt::basic_string_view<Char>> : std::true_type {};
template <typename... Ts>
struct conditional_helper {};
template <typename T, typename _ = void>
struct is_range_ : std::false_type {};
#if !FMT_MSC_VER || FMT_MSC_VER > 1800
template <typename T>
struct is_range_<T, typename std::conditional<
false,
conditional_helper<decltype(internal::declval<T>().begin()),
decltype(internal::declval<T>().end())>,
void>::type> : std::true_type {};
#endif
/// tuple_size and tuple_element check.
template <typename T>
class is_tuple_like_ {
template <typename U>
static auto check(U *p) ->
decltype(std::tuple_size<U>::value,
internal::declval<typename std::tuple_element<0, U>::type>(), int());
template <typename>
static void check(...);
public:
static FMT_CONSTEXPR_DECL const bool value =
!std::is_void<decltype(check<T>(FMT_NULL))>::value;
};
// Check for integer_sequence
#if defined(__cpp_lib_integer_sequence) || FMT_MSC_VER >= 1900
template <typename T, T... N>
using integer_sequence = std::integer_sequence<T, N...>;
template <std::size_t... N>
using index_sequence = std::index_sequence<N...>;
template <std::size_t N>
using make_index_sequence = std::make_index_sequence<N>;
#else
template <typename T, T... N>
struct integer_sequence {
typedef T value_type;
static FMT_CONSTEXPR std::size_t size() {
return sizeof...(N);
}
};
template <std::size_t... N>
using index_sequence = integer_sequence<std::size_t, N...>;
template <typename T, std::size_t N, T... Ns>
struct make_integer_sequence : make_integer_sequence<T, N - 1, N - 1, Ns...> {};
template <typename T, T... Ns>
struct make_integer_sequence<T, 0, Ns...> : integer_sequence<T, Ns...> {};
template <std::size_t N>
using make_index_sequence = make_integer_sequence<std::size_t, N>;
#endif
template <class Tuple, class F, size_t... Is>
void for_each(index_sequence<Is...>, Tuple &&tup, F &&f) FMT_NOEXCEPT {
using std::get;
// using free function get<I>(T) now.
const int _[] = {0, ((void)f(get<Is>(tup)), 0)...};
(void)_; // blocks warnings
}
template <class T>
FMT_CONSTEXPR make_index_sequence<std::tuple_size<T>::value>
get_indexes(T const &) { return {}; }
template <class Tuple, class F>
void for_each(Tuple &&tup, F &&f) {
const auto indexes = get_indexes(tup);
for_each(indexes, std::forward<Tuple>(tup), std::forward<F>(f));
}
template<typename Arg>
FMT_CONSTEXPR const char* format_str_quoted(bool add_space, const Arg&,
typename std::enable_if<
!is_like_std_string<typename std::decay<Arg>::type>::value>::type* = nullptr) {
return add_space ? " {}" : "{}";
}
template<typename Arg>
FMT_CONSTEXPR const char* format_str_quoted(bool add_space, const Arg&,
typename std::enable_if<
is_like_std_string<typename std::decay<Arg>::type>::value>::type* = nullptr) {
return add_space ? " \"{}\"" : "\"{}\"";
}
FMT_CONSTEXPR const char* format_str_quoted(bool add_space, const char*) {
return add_space ? " \"{}\"" : "\"{}\"";
}
FMT_CONSTEXPR const wchar_t* format_str_quoted(bool add_space, const wchar_t*) {
return add_space ? L" \"{}\"" : L"\"{}\"";
}
FMT_CONSTEXPR const char* format_str_quoted(bool add_space, const char) {
return add_space ? " '{}'" : "'{}'";
}
FMT_CONSTEXPR const wchar_t* format_str_quoted(bool add_space, const wchar_t) {
return add_space ? L" '{}'" : L"'{}'";
}
} // namespace internal
template <typename T>
struct is_tuple_like {
static FMT_CONSTEXPR_DECL const bool value =
internal::is_tuple_like_<T>::value && !internal::is_range_<T>::value;
};
template <typename TupleT, typename Char>
struct formatter<TupleT, Char,
typename std::enable_if<fmt::is_tuple_like<TupleT>::value>::type> {
private:
// C++11 generic lambda for format()
template <typename FormatContext>
struct format_each {
template <typename T>
void operator()(const T& v) {
if (i > 0) {
if (formatting.add_prepostfix_space) {
*out++ = ' ';
}
internal::copy(formatting.delimiter, out);
}
format_to(out,
internal::format_str_quoted(
(formatting.add_delimiter_spaces && i > 0), v),
v);
++i;
}
formatting_tuple<Char>& formatting;
std::size_t& i;
typename std::add_lvalue_reference<decltype(std::declval<FormatContext>().out())>::type out;
};
public:
formatting_tuple<Char> formatting;
template <typename ParseContext>
FMT_CONSTEXPR auto parse(ParseContext &ctx) -> decltype(ctx.begin()) {
return formatting.parse(ctx);
}
template <typename FormatContext = format_context>
auto format(const TupleT &values, FormatContext &ctx) -> decltype(ctx.out()) {
auto out = ctx.out();
std::size_t i = 0;
internal::copy(formatting.prefix, out);
internal::for_each(values, format_each<FormatContext>{formatting, i, out});
if (formatting.add_prepostfix_space) {
*out++ = ' ';
}
internal::copy(formatting.postfix, out);
return ctx.out();
}
};
template <typename T>
struct is_range {
static FMT_CONSTEXPR_DECL const bool value =
internal::is_range_<T>::value && !internal::is_like_std_string<T>::value;
};
template <typename RangeT, typename Char>
struct formatter<RangeT, Char,
typename std::enable_if<fmt::is_range<RangeT>::value>::type> {
formatting_range<Char> formatting;
template <typename ParseContext>
FMT_CONSTEXPR auto parse(ParseContext &ctx) -> decltype(ctx.begin()) {
return formatting.parse(ctx);
}
template <typename FormatContext>
typename FormatContext::iterator format(
const RangeT &values, FormatContext &ctx) {
auto out = ctx.out();
internal::copy(formatting.prefix, out);
std::size_t i = 0;
for (auto it = values.begin(), end = values.end(); it != end; ++it) {
if (i > 0) {
if (formatting.add_prepostfix_space) {
*out++ = ' ';
}
internal::copy(formatting.delimiter, out);
}
format_to(out,
internal::format_str_quoted(
(formatting.add_delimiter_spaces && i > 0), *it),
*it);
if (++i > formatting.range_length_limit) {
format_to(out, " ... <other elements>");
break;
}
}
if (formatting.add_prepostfix_space) {
*out++ = ' ';
}
internal::copy(formatting.postfix, out);
return ctx.out();
}
};
FMT_END_NAMESPACE
#endif // FMT_RANGES_H_

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// Formatting library for C++ - time formatting
//
// Copyright (c) 2012 - 2016, Victor Zverovich
// All rights reserved.
//
// For the license information refer to format.h.
#ifndef FMT_TIME_H_
#define FMT_TIME_H_
#include "format.h"
#include <ctime>
FMT_BEGIN_NAMESPACE
// Prevents expansion of a preceding token as a function-style macro.
// Usage: f FMT_NOMACRO()
#define FMT_NOMACRO
namespace internal{
inline null<> localtime_r FMT_NOMACRO(...) { return null<>(); }
inline null<> localtime_s(...) { return null<>(); }
inline null<> gmtime_r(...) { return null<>(); }
inline null<> gmtime_s(...) { return null<>(); }
}
// Thread-safe replacement for std::localtime
inline std::tm localtime(std::time_t time) {
struct dispatcher {
std::time_t time_;
std::tm tm_;
dispatcher(std::time_t t): time_(t) {}
bool run() {
using namespace fmt::internal;
return handle(localtime_r(&time_, &tm_));
}
bool handle(std::tm *tm) { return tm != FMT_NULL; }
bool handle(internal::null<>) {
using namespace fmt::internal;
return fallback(localtime_s(&tm_, &time_));
}
bool fallback(int res) { return res == 0; }
bool fallback(internal::null<>) {
using namespace fmt::internal;
std::tm *tm = std::localtime(&time_);
if (tm) tm_ = *tm;
return tm != FMT_NULL;
}
};
dispatcher lt(time);
if (lt.run())
return lt.tm_;
// Too big time values may be unsupported.
FMT_THROW(format_error("time_t value out of range"));
}
// Thread-safe replacement for std::gmtime
inline std::tm gmtime(std::time_t time) {
struct dispatcher {
std::time_t time_;
std::tm tm_;
dispatcher(std::time_t t): time_(t) {}
bool run() {
using namespace fmt::internal;
return handle(gmtime_r(&time_, &tm_));
}
bool handle(std::tm *tm) { return tm != FMT_NULL; }
bool handle(internal::null<>) {
using namespace fmt::internal;
return fallback(gmtime_s(&tm_, &time_));
}
bool fallback(int res) { return res == 0; }
bool fallback(internal::null<>) {
std::tm *tm = std::gmtime(&time_);
if (tm) tm_ = *tm;
return tm != FMT_NULL;
}
};
dispatcher gt(time);
if (gt.run())
return gt.tm_;
// Too big time values may be unsupported.
FMT_THROW(format_error("time_t value out of range"));
}
namespace internal {
inline std::size_t strftime(char *str, std::size_t count, const char *format,
const std::tm *time) {
return std::strftime(str, count, format, time);
}
inline std::size_t strftime(wchar_t *str, std::size_t count,
const wchar_t *format, const std::tm *time) {
return std::wcsftime(str, count, format, time);
}
}
template <typename Char>
struct formatter<std::tm, Char> {
template <typename ParseContext>
auto parse(ParseContext &ctx) -> decltype(ctx.begin()) {
auto it = internal::null_terminating_iterator<Char>(ctx);
if (*it == ':')
++it;
auto end = it;
while (*end && *end != '}')
++end;
tm_format.reserve(end - it + 1);
using internal::pointer_from;
tm_format.append(pointer_from(it), pointer_from(end));
tm_format.push_back('\0');
return pointer_from(end);
}
template <typename FormatContext>
auto format(const std::tm &tm, FormatContext &ctx) -> decltype(ctx.out()) {
internal::basic_buffer<Char> &buf = internal::get_container(ctx.out());
std::size_t start = buf.size();
for (;;) {
std::size_t size = buf.capacity() - start;
std::size_t count =
internal::strftime(&buf[start], size, &tm_format[0], &tm);
if (count != 0) {
buf.resize(start + count);
break;
}
if (size >= tm_format.size() * 256) {
// If the buffer is 256 times larger than the format string, assume
// that `strftime` gives an empty result. There doesn't seem to be a
// better way to distinguish the two cases:
// https://github.com/fmtlib/fmt/issues/367
break;
}
const std::size_t MIN_GROWTH = 10;
buf.reserve(buf.capacity() + (size > MIN_GROWTH ? size : MIN_GROWTH));
}
return ctx.out();
}
basic_memory_buffer<Char> tm_format;
};
FMT_END_NAMESPACE
#endif // FMT_TIME_H_

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// Formatting library for C++
//
// Copyright (c) 2012 - 2016, Victor Zverovich
// All rights reserved.
//
// For the license information refer to format.h.
#include "fmt/format-inl.h"
FMT_BEGIN_NAMESPACE
template struct internal::basic_data<void>;
// Explicit instantiations for char.
template FMT_API char internal::thousands_sep(locale_provider *lp);
template void internal::basic_buffer<char>::append(const char *, const char *);
template void basic_fixed_buffer<char>::grow(std::size_t);
template void internal::arg_map<format_context>::init(
const basic_format_args<format_context> &args);
template FMT_API int internal::char_traits<char>::format_float(
char *, std::size_t, const char *, int, double);
template FMT_API int internal::char_traits<char>::format_float(
char *, std::size_t, const char *, int, long double);
template FMT_API std::string internal::vformat<char>(
string_view, basic_format_args<format_context>);
// Explicit instantiations for wchar_t.
template FMT_API wchar_t internal::thousands_sep(locale_provider *);
template void internal::basic_buffer<wchar_t>::append(
const wchar_t *, const wchar_t *);
template void basic_fixed_buffer<wchar_t>::grow(std::size_t);
template void internal::arg_map<wformat_context>::init(
const basic_format_args<wformat_context> &);
template FMT_API int internal::char_traits<wchar_t>::format_float(
wchar_t *, std::size_t, const wchar_t *, int, double);
template FMT_API int internal::char_traits<wchar_t>::format_float(
wchar_t *, std::size_t, const wchar_t *, int, long double);
template FMT_API std::wstring internal::vformat<wchar_t>(
wstring_view, basic_format_args<wformat_context>);
FMT_END_NAMESPACE

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// A C++ interface to POSIX functions.
//
// Copyright (c) 2012 - 2016, Victor Zverovich
// All rights reserved.
//
// For the license information refer to format.h.
// Disable bogus MSVC warnings.
#if !defined(_CRT_SECURE_NO_WARNINGS) && defined(_MSC_VER)
# define _CRT_SECURE_NO_WARNINGS
#endif
#include "fmt/posix.h"
#include <limits.h>
#include <sys/types.h>
#include <sys/stat.h>
#ifndef _WIN32
# include <unistd.h>
#else
# ifndef WIN32_LEAN_AND_MEAN
# define WIN32_LEAN_AND_MEAN
# endif
# include <windows.h>
# include <io.h>
# define O_CREAT _O_CREAT
# define O_TRUNC _O_TRUNC
# ifndef S_IRUSR
# define S_IRUSR _S_IREAD
# endif
# ifndef S_IWUSR
# define S_IWUSR _S_IWRITE
# endif
# ifdef __MINGW32__
# define _SH_DENYNO 0x40
# endif
#endif // _WIN32
#ifdef fileno
# undef fileno
#endif
namespace {
#ifdef _WIN32
// Return type of read and write functions.
typedef int RWResult;
// On Windows the count argument to read and write is unsigned, so convert
// it from size_t preventing integer overflow.
inline unsigned convert_rwcount(std::size_t count) {
return count <= UINT_MAX ? static_cast<unsigned>(count) : UINT_MAX;
}
#else
// Return type of read and write functions.
typedef ssize_t RWResult;
inline std::size_t convert_rwcount(std::size_t count) { return count; }
#endif
}
FMT_BEGIN_NAMESPACE
buffered_file::~buffered_file() FMT_NOEXCEPT {
if (file_ && FMT_SYSTEM(fclose(file_)) != 0)
report_system_error(errno, "cannot close file");
}
buffered_file::buffered_file(cstring_view filename, cstring_view mode) {
FMT_RETRY_VAL(file_,
FMT_SYSTEM(fopen(filename.c_str(), mode.c_str())), FMT_NULL);
if (!file_)
FMT_THROW(system_error(errno, "cannot open file {}", filename.c_str()));
}
void buffered_file::close() {
if (!file_)
return;
int result = FMT_SYSTEM(fclose(file_));
file_ = FMT_NULL;
if (result != 0)
FMT_THROW(system_error(errno, "cannot close file"));
}
// A macro used to prevent expansion of fileno on broken versions of MinGW.
#define FMT_ARGS
int buffered_file::fileno() const {
int fd = FMT_POSIX_CALL(fileno FMT_ARGS(file_));
if (fd == -1)
FMT_THROW(system_error(errno, "cannot get file descriptor"));
return fd;
}
file::file(cstring_view path, int oflag) {
int mode = S_IRUSR | S_IWUSR;
#if defined(_WIN32) && !defined(__MINGW32__)
fd_ = -1;
FMT_POSIX_CALL(sopen_s(&fd_, path.c_str(), oflag, _SH_DENYNO, mode));
#else
FMT_RETRY(fd_, FMT_POSIX_CALL(open(path.c_str(), oflag, mode)));
#endif
if (fd_ == -1)
FMT_THROW(system_error(errno, "cannot open file {}", path.c_str()));
}
file::~file() FMT_NOEXCEPT {
// Don't retry close in case of EINTR!
// See http://linux.derkeiler.com/Mailing-Lists/Kernel/2005-09/3000.html
if (fd_ != -1 && FMT_POSIX_CALL(close(fd_)) != 0)
report_system_error(errno, "cannot close file");
}
void file::close() {
if (fd_ == -1)
return;
// Don't retry close in case of EINTR!
// See http://linux.derkeiler.com/Mailing-Lists/Kernel/2005-09/3000.html
int result = FMT_POSIX_CALL(close(fd_));
fd_ = -1;
if (result != 0)
FMT_THROW(system_error(errno, "cannot close file"));
}
long long file::size() const {
#ifdef _WIN32
// Use GetFileSize instead of GetFileSizeEx for the case when _WIN32_WINNT
// is less than 0x0500 as is the case with some default MinGW builds.
// Both functions support large file sizes.
DWORD size_upper = 0;
HANDLE handle = reinterpret_cast<HANDLE>(_get_osfhandle(fd_));
DWORD size_lower = FMT_SYSTEM(GetFileSize(handle, &size_upper));
if (size_lower == INVALID_FILE_SIZE) {
DWORD error = GetLastError();
if (error != NO_ERROR)
FMT_THROW(windows_error(GetLastError(), "cannot get file size"));
}
unsigned long long long_size = size_upper;
return (long_size << sizeof(DWORD) * CHAR_BIT) | size_lower;
#else
typedef struct stat Stat;
Stat file_stat = Stat();
if (FMT_POSIX_CALL(fstat(fd_, &file_stat)) == -1)
FMT_THROW(system_error(errno, "cannot get file attributes"));
static_assert(sizeof(long long) >= sizeof(file_stat.st_size),
"return type of file::size is not large enough");
return file_stat.st_size;
#endif
}
std::size_t file::read(void *buffer, std::size_t count) {
RWResult result = 0;
FMT_RETRY(result, FMT_POSIX_CALL(read(fd_, buffer, convert_rwcount(count))));
if (result < 0)
FMT_THROW(system_error(errno, "cannot read from file"));
return internal::to_unsigned(result);
}
std::size_t file::write(const void *buffer, std::size_t count) {
RWResult result = 0;
FMT_RETRY(result, FMT_POSIX_CALL(write(fd_, buffer, convert_rwcount(count))));
if (result < 0)
FMT_THROW(system_error(errno, "cannot write to file"));
return internal::to_unsigned(result);
}
file file::dup(int fd) {
// Don't retry as dup doesn't return EINTR.
// http://pubs.opengroup.org/onlinepubs/009695399/functions/dup.html
int new_fd = FMT_POSIX_CALL(dup(fd));
if (new_fd == -1)
FMT_THROW(system_error(errno, "cannot duplicate file descriptor {}", fd));
return file(new_fd);
}
void file::dup2(int fd) {
int result = 0;
FMT_RETRY(result, FMT_POSIX_CALL(dup2(fd_, fd)));
if (result == -1) {
FMT_THROW(system_error(errno,
"cannot duplicate file descriptor {} to {}", fd_, fd));
}
}
void file::dup2(int fd, error_code &ec) FMT_NOEXCEPT {
int result = 0;
FMT_RETRY(result, FMT_POSIX_CALL(dup2(fd_, fd)));
if (result == -1)
ec = error_code(errno);
}
void file::pipe(file &read_end, file &write_end) {
// Close the descriptors first to make sure that assignments don't throw
// and there are no leaks.
read_end.close();
write_end.close();
int fds[2] = {};
#ifdef _WIN32
// Make the default pipe capacity same as on Linux 2.6.11+.
enum { DEFAULT_CAPACITY = 65536 };
int result = FMT_POSIX_CALL(pipe(fds, DEFAULT_CAPACITY, _O_BINARY));
#else
// Don't retry as the pipe function doesn't return EINTR.
// http://pubs.opengroup.org/onlinepubs/009696799/functions/pipe.html
int result = FMT_POSIX_CALL(pipe(fds));
#endif
if (result != 0)
FMT_THROW(system_error(errno, "cannot create pipe"));
// The following assignments don't throw because read_fd and write_fd
// are closed.
read_end = file(fds[0]);
write_end = file(fds[1]);
}
buffered_file file::fdopen(const char *mode) {
// Don't retry as fdopen doesn't return EINTR.
FILE *f = FMT_POSIX_CALL(fdopen(fd_, mode));
if (!f)
FMT_THROW(system_error(errno,
"cannot associate stream with file descriptor"));
buffered_file bf(f);
fd_ = -1;
return bf;
}
long getpagesize() {
#ifdef _WIN32
SYSTEM_INFO si;
GetSystemInfo(&si);
return si.dwPageSize;
#else
long size = FMT_POSIX_CALL(sysconf(_SC_PAGESIZE));
if (size < 0)
FMT_THROW(system_error(errno, "cannot get memory page size"));
return size;
#endif
}
FMT_END_NAMESPACE