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Specialize conversion between wchar_t* and string on Windows (#7)
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// Copyright (c) 2023 Steven Stallion <sstallion@gmail.com> | ||
// | ||
// 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 AUTHOR 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 AUTHOR 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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package hid | ||
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// Replace C.mbstowcs() and C.wcstombs() for Windows only. Those functions | ||
// don't work on some characters of MBCS (Chinese, Japanese, Korean, or so) | ||
// because of code pages, encoding, C runtime, and the compiler used by CGO. | ||
// | ||
// See the following links for background: | ||
// | ||
// - https://github.com/sstallion/go-hid/pull/7 | ||
// - https://github.com/sstallion/go-hid/issues/6 | ||
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/* | ||
#include <wchar.h> | ||
*/ | ||
import "C" | ||
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import ( | ||
"golang.org/x/sys/windows" | ||
) | ||
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// gotowcs converts a Go string to a C wide string. The returned string must | ||
// be freed by the caller by calling C.free. | ||
func gotowcs(s string) *C.wchar_t { | ||
u16s, err := windows.UTF16FromString(s) | ||
if err != nil { | ||
panic(err) | ||
} | ||
n := C.size_t(len(u16s)) | ||
wcs := (*C.wchar_t)(calloc(n+1, C.sizeof_wchar_t)) | ||
return C.wmemcpy(wcs, (*C.wchar_t)(&u16s[0]), n) | ||
} | ||
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// wcstogo converts a C wide string to a Go string. | ||
func wcstogo(wcs *C.wchar_t) string { | ||
return windows.UTF16PtrToString((*uint16)(wcs)) | ||
} |