File size: 3,603 Bytes
7e9dc27 |
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 |
------------------------------------------------------------------
--
-- Author: Alexey Melnichuk <alexeymelnichuck@gmail.com>
--
-- Copyright (C) 2013-2016 Alexey Melnichuk <alexeymelnichuck@gmail.com>
--
-- Licensed according to the included 'LICENCE' document
--
-- This file is part of lua-path library.
--
------------------------------------------------------------------
local alien = require "alien"
local kernel32 = assert(alien.load("kernel32.dll"))
local MultiByteToWideChar_ = assert(kernel32.MultiByteToWideChar)
local WideCharToMultiByte_ = assert(kernel32.WideCharToMultiByte)
local GetLastError = assert(kernel32.GetLastError)
local DWORD = "uint"
local WCHAR_SIZE = 2
-- int __stdcall MultiByteToWideChar(UINT cp, DWORD flag, const char* src, int srclen, wchar_t* dst, int dstlen);
MultiByteToWideChar_:types{abi="stdcall", ret = "int",
"uint", -- cp
DWORD, -- flag
"string", -- src (const char*)
"int", -- srclen
"string", -- dst (wchar_t*)
"int" -- dstlen
}
--int __stdcall WideCharToMultiByte(UINT cp, DWORD flag, const wchar_t* src, int srclen, char* dst, int dstlen, const char* defchar, int* used);
WideCharToMultiByte_:types{abi="stdcall", ret = "int",
"int", -- cp
DWORD, -- flag
"string", -- src (const wchar_t*)
"int", -- srclen
"string", -- dst (char*)
"int", -- dstlen
"pointer", -- defchar (char*)
"pointer" -- used(int*)
}
GetLastError:types{ret = DWORD, abi='stdcall'}
local function strnlen(data, n)
if type(data) == 'string' then
return #data
end
n = n or #data
for i = 1, n do
if data[i] == 0 then
return i
end
end
return n
end
local function wcsnlen(data, n)
if type(data) == 'string' then
return math.ceil(#data/2)
end
n = n or #data
for i = 1, (2 * n), 2 do
if (data[i] == 0) and (data[i+1] == 0) then
return math.floor( i / 2 )
end
end
return n
end
local function MultiByteToWideChar(src, cp)
local flag = true
local buflen = strnlen(src)
local dst = alien.buffer( WCHAR_SIZE * (buflen + 1) ) -- eos
local ret = MultiByteToWideChar_(cp, 0, src, #src, dst, buflen)
if ret < 0 then return nil, GetLastError() end
if ret <= buflen then
dst[ret * WCHAR_SIZE ] = 0
dst[ret * WCHAR_SIZE + 1] = 0
return dst, ret
end
dst = alien.buffer(WCHAR_SIZE * 1)
dst[0] = 0
dst[1] = 0
return dst,0
end
local function WideCharToMultiByte(src, cp)
local srclen = wcsnlen(src)
local buflen = (srclen + 1)
while true do
local dst = alien.buffer(buflen + 1) -- eof
local ret = WideCharToMultiByte_(cp, 0, src, srclen, dst, buflen, nil, nil)
if ret <= 0 then
local err = GetLastError()
if err == 122 then -- buffer too small
buflen = math.ceil(1.5 * buflen)
else
return nil, err
end
else
if ret <= buflen then
return dst, ret
end
end
end
local dst = alien.buffer(1)
dst[0] = 0
return dst, 0
end
local function LUA_M2W(src, ...)
if not src or #src == 0 then return src end
local dst, dstlen = MultiByteToWideChar(src, ...)
if not dst then return nil, dstlen end
return dst:tostring(dstlen * WCHAR_SIZE)
end
local function LUA_W2M(src, ...)
if not src or #src == 0 then return src end
local dst, dstlen = WideCharToMultiByte(src, ...)
if not dst then return nil, dstlen end
return dst:tostring(dstlen)
end
local _M = {
MultiByteToWideChar = MultiByteToWideChar;
WideCharToMultiByte = WideCharToMultiByte;
mbstowcs = LUA_M2W;
wcstombs = LUA_W2M;
}
return _M |