forked from mia/Aegisub
134 lines
2.6 KiB
Lua
134 lines
2.6 KiB
Lua
local ffi = require("ffi")
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if ffi.os ~= "Windows" then
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return
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end
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-- Safety first!
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do
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if pcall(string.dump, io.open) then
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error("io.open is already patched!")
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end
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local function index(t, k)
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return t[k]
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end
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if pcall(index, ffi.C, "GetACP") == false then
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ffi.cdef[[
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uint32_t __stdcall GetACP();
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]]
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end
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end
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local CP_UTF8 = 65001
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local MB_ERR_INVALID_CHARS = 8
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if ffi.C.GetACP() == CP_UTF8 then
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-- "Use Unicode UTF-8 for worldwide language support" is ticked.
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-- Don't bother patching it.
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return
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end
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ffi.cdef[[
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int32_t __stdcall MultiByteToWideChar(
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uint32_t CodePage,
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uint32_t dwFlags,
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const char *lpMultiByteStr,
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int32_t cbMultiByte,
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wchar_t *lpWideCharStr,
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int32_t cchWideChar
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);
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void *_wfreopen(wchar_t *path, wchar_t *mode, void *file);
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int32_t _wrename(wchar_t *oldname, wchar_t *newname);
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int32_t _wremove(wchar_t *path);
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int32_t _wsystem(wchar_t *command);
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char *strerror(int errnum);
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]]
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local function widen(ch)
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local size = ffi.C.MultiByteToWideChar(CP_UTF8, MB_ERR_INVALID_CHARS, ch, #ch, nil, 0)
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if size == 0 then
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error(fname .. ": invalid character sequence")
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end
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local buf = ffi.new("wchar_t[?]", size + 1)
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if ffi.C.MultiByteToWideChar(CP_UTF8, MB_ERR_INVALID_CHARS, ch, #ch, buf, size) == 0 then
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error(fname .. ": char conversion error")
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end
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return buf
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end
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local function fileresult(stat, fname)
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if stat == 0 then
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return true
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end
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local errno = ffi.errno()
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local msg = ffi.C.strerror(errno)
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if fname then
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return nil, fname .. ": " .. ffi.string(msg), errno
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end
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return nil, msg, errno
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end
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local function execresult(stat)
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if stat == -1 then
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return fileresult(0, nil)
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end
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if stat == 0 then
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return true, "exit", stat
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end
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return nil, "exit", stat
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end
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local orig_open = io.open
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local orig_rename = os.rename
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local orig_remove = os.remove
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local orig_execute = os.execute
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function io.open(fname, mode)
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local wfname = widen(fname)
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if not mode then
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mode = "r"
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end
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local wmode = widen(mode)
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local file = assert(orig_open("nul", "rb"))
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if ffi.C._wfreopen(wfname, wmode, file) == nil then
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local msg, errno = select(2, file:close())
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return nil, fname .. ": " .. msg, errno
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end
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return file
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end
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function os.rename(oldname, newname)
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local woldname = widen(oldname)
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local wnewname = widen(newname)
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local stat = ffi.C._wrename(woldname, wnewname)
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return fileresult(stat, oldname)
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end
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function os.remove(fname)
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local wfname = widen(fname)
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local stat = ffi.C._wremove(wfname)
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return fileresult(stat, fname)
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end
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function os.execute(command)
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local wcommand = command
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if command then
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wcommand = widen(command)
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local stat = ffi.C._wsystem(wcommand)
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return execresult(stat)
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end
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return true
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end
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