Unicode2Ansi.txt

::獲取當前代碼頁
for /f "tokens=2 delims=:" %%l in ('chcp') do set "code_page=%%l"
set "code_page=%code_page: =%"

::先輸出一個Unicode檔案
reg  export  HKCR\.txt  U.bom

::取得 Unicode BOM
chcp 1252
set /p BOM=<U.bom
set /p=%BOM:~0,2%<nul  >U.bom
::或
echo.//4=>U.bom.txt
certutil -decode -f U.bom.txt U.bom>nul
del /f/q U.bom.txt 2>nul

::ansi → Unicode
chcp %code_page%
copy  U.bom  Unicode.txt
cmd /u /c "type ansi.txt >>Unicode.txt"

::=======================================

chcp 65001


::Unicode → 無BOM的UTF-8
type Unicode.txt > UTF-8-0.txt


::Unicode → 有BOM的UTF-8
copy /b U.bom + Unicode.txt  Unicode-2B.txt
type Unicode-2B.txt > UTF-8-B.txt

::=======================================
::無BOM的UTF-8 → Unicode
copy  U.bom  Unicode-save-0.txt
cmd /u /c  "type  UTF-8-0.txt >> Unicode-save-0.txt"


::有BOM的UTF-8 → Unicode
cmd /u /c  "type  UTF-8-B.txt > Unicode-save-1.txt"

::========================================
::Unicode → ansi

chcp %code_page%

type Unicode-save-0.txt > ansi-save-0.txt

type Unicode-save-1.txt > ansi-save-1.txt

utf8bom: echo '77u/' | base64 -d > utf8.bom