41 lines
1.2 KiB
Lua
41 lines
1.2 KiB
Lua
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local ffi = require "ffi"
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local kernel32 = ffi.load("kernel32")
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ffi.cdef[[
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int Beep(int x, int y);
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typedef unsigned int UINT;
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typedef unsigned int DWORD;
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typedef const char * LPCSTR;
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typedef char * LPSTR;
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typedef wchar_t * LPWSTR;
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typedef const wchar_t *LPCWSTR;
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typedef int *LPBOOL;
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int WideCharToMultiByte(UINT CodePage,
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DWORD dwFlags,
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LPCWSTR lpWideCharStr, int cchWideChar,
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LPSTR lpMultiByteStr, int cbMultiByte,
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LPCSTR lpDefaultChar,
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LPBOOL lpUsedDefaultChar
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);
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int MultiByteToWideChar(UINT CodePage,
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DWORD dwFlags,
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LPCSTR lpMultiByteStr, int cbMultiByte,
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LPWSTR lpWideCharStr, int cchWideChar);
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]]
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local CP_UTF8 = 65001
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local function to_utf16(s)
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local needed = kernel32.MultiByteToWideChar(CP_UTF8, 0, s, -1, NULL, 0)
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local buf = ffi.new("wchar_t[?]", needed)
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local written = kernel32.MultiByteToWideChar(CP_UTF8, 0, s, -1, buf, needed)
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return ffi.string(buf, written*2)
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end
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local function to_utf8(s)
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local needed = kernel32.WideCharToMultiByte(CP_UTF8, 0, s, -1, nil, 0, nil, nil)
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local buf = ffi.new("char[?]", needed)
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local written = kernel32.WideCharToMultiByte(CP_UTF8, 0, s, -1, buf, needed, nil, nil)
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return ffi.string(buf, written - 1)
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end
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return {to_utf8=to_utf8, to_utf16=to_utf16}
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