decrement of a number in filename with cmd on windows-CodePudding

I have a bunch of files:

CAR_003.dat
CAR_003.obj
CAR_004_prev0.png
CAR_004_prev1.png
CAR_004_tex0.tga

I need to rename them to:

CAR_002.dat
CAR_002.obj
CAR_003_prev0.png
CAR_003_prev1.png
CAR_003_tex0.tga

how I can do this with cmd on windows in a batch?

CodePudding user response：

You need to execute the following batch in the directory you want.
It will rename everything in the tree.

@ECHO off
SETLOCAL EnableDelayedExpansion

FOR /R %%f in (CAR*) DO (
  FOR /F "usebackq tokens=1,2,* delims=_" %%m in ('%%~nxf') do (
    SET      filePath=%%~dpf
    SET    filePrefix=%%m_
    SET /a fileNumber=1%%~nn-1001
    SET    fileNumber=000!fileNumber!
    SET    fileNumber=!fileNumber:~-3!
    SET    filePosfix=%%~no
    SET       fileExt=%%~xf
    IF [!filePosfix!] EQU [] ( 
      SET    fileRest=%%~xf
    ) ELSE ( 
      SET    fileRest=_!filePosfix!!fileExt!
    )
    REM ECHO %%f
    REM ECHO !filePath!!filePrefix!!fileNumber!!fileRest!
    REM ECHO ~~~~~~~
    MOVE "%%f" "!filePath!!filePrefix!!fileNumber!!fileRest!"
  )
)

CodePudding user response：

Use a 0-9 loop for hundreds, for tens and for unit...

Order to compose a regex ([h][t][u]) that can be used to isolate the looped file

Apply the subtraction and substring to get the target name

@echo off

cd /d "%~dp0"
setlocal enabledelayedexpansion

for /l %%h in (0,1,9)do for /l %%t in (0,1,9)do for /l %%u in (0,1,9
)do if exist .\"*_%%h%%t%%u*.*" call %:^) %%h%%t%%u "[%%h][%%t][%%u]"

%:^)
if /i "%~1" == "" (endlocal & goto :eOf)else set /a "_new=1%~1-1"
for /f "delims=" %%i in ('dir /b /a:-d .\* ^| findstr /er .*\_%~2.*
')do set "_name=%%~i" & call echo\ren "%%~i" "!_name:%~1=%_new:~-3%!"

exit /b

Obs.: Check if the rename commands are correctly composed on the output, and for effective execution remove the echo\ from the call echo\ren command..

')do set "_name=%%~i" & call echo\ren "%%~i" "!_name:%~1=%_new:~-3%!"