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bdca8b01d2
#pragma once is a widely supported compiler pragma, even though it is not part of the C++ standard. Many of the issues keeping #pragma once from being standardized (distributed filesystems, build farms, hard links, etc.) do not apply to CMake - it is easy to build CMake on a single machine. CMake also does not install any header files which can be consumed by other projects (though cmCPluginAPI.h has been deliberately omitted from this conversion in case anyone is still using it.) Finally, #pragma once has been required to build CMake since at least August 2017 (7f29bbe6enabled server mode unconditionally, which had been using #pragma once since September 2016 (b13d3e0d)). The fact that we now require C++11 filters out old compilers, and it is unlikely that there is a compiler which supports C++11 but does not support #pragma once.
64 lines
1.8 KiB
C++
64 lines
1.8 KiB
C++
/* 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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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 throw() 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 throw() override;
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int do_encoding() const throw() 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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