53 lines
1.4 KiB
C++
53 lines
1.4 KiB
C++
/*
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/.
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*
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* Copyright 2019 Danny Robson <danny@nerdcruft.net>
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*/
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#include "./si.hpp"
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#include "./value.hpp"
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#include <cruft/util/std.hpp>
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#include <cruft/util/preprocessor.hpp>
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///////////////////////////////////////////////////////////////////////////////
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template <typename ValueT>
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cruft::expected<ValueT, std::errc>
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cruft::parse::si (cruft::view<char const*> const src)
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{
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auto remain = src;
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ValueT dst = cruft::parse::value<ValueT> (remain);
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switch (remain.size ()) {
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case 0:
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return dst;
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case 1:
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switch (remain[0]) {
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case 'K': case 'k': return dst * 1024;
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case 'M': case 'm': return dst * 1024 * 1024;
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case 'G': case 'g': return dst * 1024 * 1024 * 1024;
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case 'T': case 't': return dst * 1024 * 1024 * 1024 * 1024;
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}
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[[fallthrough]];
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default:
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return cruft::unexpected (std::errc::invalid_argument);
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}
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}
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///////////////////////////////////////////////////////////////////////////////
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#define INSTANTIATE(KLASS) template cruft::expected<KLASS,std::errc> cruft::parse::si (cruft::view<char const*>);
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MAP0 (INSTANTIATE,
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u16, u32, u64,
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i16, i32, i64,
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f32, f64
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)
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