mirror of
https://github.com/jart/cosmopolitan.git
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109 lines
2.6 KiB
C++
109 lines
2.6 KiB
C++
// -*- mode:c++; indent-tabs-mode:nil; c-basic-offset:4; coding:utf-8 -*-
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// vi: set et ft=cpp ts=4 sts=4 sw=4 fenc=utf-8 :vi
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//
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// Copyright 2024 Justine Alexandra Roberts Tunney
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//
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// Permission to use, copy, modify, and/or distribute this software for
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// any purpose with or without fee is hereby granted, provided that the
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// above copyright notice and this permission notice appear in all copies.
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//
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// THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL
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// WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED
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// WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE
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// AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
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// DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
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// PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
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// TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
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// PERFORMANCE OF THIS SOFTWARE.
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#include "dubble.h"
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#include "libc/fmt/itoa.h"
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#include "libc/math.h"
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#include "string.h"
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#include "third_party/gdtoa/gdtoa.h"
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namespace ctl {
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extern const double_conversion::DoubleToStringConverter kDoubleToPrintfG;
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string
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to_string(int value) noexcept
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{
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char buf[12];
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return { buf, FormatInt32(buf, value) - buf };
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}
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string
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to_string(unsigned value) noexcept
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{
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char buf[12];
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return { buf, FormatUint32(buf, value) - buf };
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}
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string
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to_string(long value) noexcept
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{
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char buf[21];
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return { buf, FormatInt64(buf, value) - buf };
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}
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string
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to_string(unsigned long value) noexcept
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{
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char buf[21];
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return { buf, FormatUint64(buf, value) - buf };
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}
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string
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to_string(long long value) noexcept
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{
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char buf[21];
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return { buf, FormatInt64(buf, value) - buf };
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}
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string
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to_string(unsigned long long value) noexcept
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{
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char buf[21];
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return { buf, FormatUint64(buf, value) - buf };
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}
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string
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to_string(float value) noexcept
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{
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char buf[128];
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double_conversion::StringBuilder b(buf, sizeof(buf));
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kDoubleToPrintfG.ToShortestSingle(value, &b);
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b.Finalize();
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return string(buf);
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}
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string
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to_string(double value) noexcept
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{
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char buf[128];
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double_conversion::StringBuilder b(buf, sizeof(buf));
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kDoubleToPrintfG.ToShortest(value, &b);
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b.Finalize();
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return string(buf);
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}
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string
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to_string(long double value) noexcept
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{
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#if LDBL_MANT_DIG == 53 && LDBL_MAX_EXP == 1024
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return to_string((double)value);
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#else
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char buf[128];
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#if LDBL_MANT_DIG == 113
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g_Qfmt_p(buf, &value, 16, 128, NIK(2, 0, 0));
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#elif LDBL_MANT_DIG == 64
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g_xfmt_p(buf, &value, 16, 128, NIK(2, 0, 0));
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#else
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#error "unsupported long double"
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#endif
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return string(buf);
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#endif
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}
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} // namespace ctl
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