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65 lines
1.8 KiB
65 lines
1.8 KiB
/* Distributed under the OSI-approved BSD 3-Clause License. See accompanying
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file Copyright.txt or https://cmake.org/licensing for details. */
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#pragma once
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#include "cmConfigure.h" // IWYU pragma: keep
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#include <cwchar>
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#include <locale>
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class codecvt : public std::codecvt<char, char, mbstate_t>
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{
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public:
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enum Encoding
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{
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None,
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UTF8,
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UTF8_WITH_BOM,
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ANSI
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};
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#ifndef CMAKE_BOOTSTRAP
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codecvt(Encoding e);
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protected:
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~codecvt() override;
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bool do_always_noconv() const noexcept override;
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result do_out(mbstate_t& state, const char* from, const char* from_end,
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const char*& from_next, char* to, char* to_end,
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char*& to_next) const override;
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result do_unshift(mbstate_t& state, char* to, char*,
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char*& to_next) const override;
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int do_max_length() const noexcept override;
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int do_encoding() const noexcept override;
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private:
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// The mbstate_t argument to do_out and do_unshift is responsible
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// for storing state between calls. We cannot control the type
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// since we want to imbue on standard streams. However, we do
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// know that it is a trivial type. Define our own type to overlay
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// on it safely with no alignment requirements.
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struct State
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{
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// Buffer bytes we have consumed from a partial codepoint.
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char partial[3];
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// Number of bytes we have buffered from a partial codepoint.
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unsigned char buffered : 4;
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// Size of the current codepoint in bytes.
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unsigned char size : 4;
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};
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bool m_noconv;
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# if defined(_WIN32)
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unsigned int m_codepage;
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result Decode(mbstate_t& state, int need, const char*& from_next,
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char*& to_next, char* to_end) const;
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result DecodePartial(mbstate_t& state, char*& to_next, char* to_end) const;
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void BufferPartial(mbstate_t& state, int need, const char*& from_next) const;
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# endif
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#endif
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};
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