Off-topic discussion • Re: File Name Quoting

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@echo offrem   "carot.bat" (heh) "carat.bat"rem   SjB 10-3-2022rem   causerem   a filename, with a ^ (carat), but NOT followed by a <sp> (somewhere in the filename)rem   is NOT parsed correctlyrem   when used with a 'SendTo' or a 'drag & drop'rem   file names such as: "x^x" or "x^x.txt", FAIL, where "x^ x x" (contains spaces) or "x^ - test 123.TXT" are just finerem   probably - ONLY with batch files (using %* or %1...), where doing the same directly to a .exe is not an issueremrem   go.bat (drag & drop files to go.bat & observe results):rem   @echo offrem   echo %*rem   pauseremrem   work-around, per void, per xxx, noted up, VERY ROUGHLY, & NOT understood very well - by me ;-)@echo off:: do note that originally, when i was echoing, /I/ used parms, where /he/ used params:: and that is why, at first, i was getting NOTHING echoed back with my PARMS  (dumy!):: and to confuse things more, i've not kept both my PARMS & his params ;-):: in my comments below, "BOTH" or "2"... all depend on how many files were sent to carot.bat:: & whether they contained spaced or not...setlocal DisableDelayedExpansionset index=0setlocal EnableDelayedExpansionrem *** Take the cmd-line, remove all until the first parameterrem *** Copy cmdcmdline without any modifications, as cmdcmdline has some strange behaviourset "params=!cmdcmdline!"rem   echo parms: %params%rem   echo parms: !params!rem   echo cmd  : !cmdcmdline!rem   echo.rem   echo ...........cmd is the FULL command line, incl. cmd.exe /c itself...rem   :: so %cmdcmdline% == e:/.../cmd.exe == %ComSpec%rem   :: but how/why does !cmdcmdline! get resolved to "everything"?rem   pauseset "params=!params:~0,-1!"rem   echo.rem   echo parms01: %params%rem   echo parms01: !params:~0,-1!rem   echo ...........not sure what is going on here?rem   echo ...........in this case parms01 /IS/ being set (and can be read back - SANS the closing ")rem   echo ...........and what, ~0 is the full command line?rem   echo ...........as is ~0,-1? (where ~0,1 would be the first parameter, or something ?)rem   echo ...........ah no! that says ~0, the full command line /MINUS/ the final character (the closing ")rem   echo ...........and ~0,-2 would be the full command line /MINUS/ the final 2 characters - so similar to a seg$(len-1)rem   pauseset "params=!params:*" =!"rem   echo.rem   echo parms02: %params%rem   echo parms02: !params:*" =!rem   echo ...........shows the 2ND filenmame, but not the first - not sure why?rem   echo ...........but if there were 2 non-quoted files, they do both display here?rem   echo ...........oh, and PARMS02 contains the "bastardized", wrong name, where params... contains the "correct" namesrem   echo ...........maybe, params... contains only the "non-quoted" parameters?rem   pauserem   echo.rem   echo params: !params!rem   echo.rem   echo ...........now, why do BOTH names show up here?rem   pauserem   echo.rem   echo parms03: %params%rem   echo.rem   echo ...........at this point, PARMS03 is the same as paramsrem   pauserem   xxh %params%rem   echo.rem   echo ...........so, NO, this does not work, cause as soon as you use PARMS03, it again gets bastardizedrem   pauserem   echo.rem Split the parameters on spaces but respect the quotesfor %%G IN (!params!) do (    for %%# in (!index!) do (        endlocal        set /a index+=1        set "item_%%#=%%~G"        setlocal EnableDelayedExpansion    ))rem   :: so... !index! is incremented for each filename passed (initially set to 0)set /a max=index-1rem   :: makes the max (math) correctrem list the parametersfor /L %%n in (0,1,!max!) DO (  xxh  "!item_%%n!")rem   :: oh, so item_%%n, where %n is an index (array) number, holds the passed filenames from %Grem   :: so is this a "round-about" way, or a "robust" way to do things?rem   :: could you just combine the %G parts with xxh.exe %G, or does the "expansion" play in?echo Done!pauseREM ** The exit is important, so the cmd.exe doesn't try to execute commands after ampersandsexitDealing with %1, shift or %* could fail with drag&drop, because the explorer is not very smart, when it creates the command line.Files like Cool&stuff.cue are not quoted by the explorer so you get a cmdline likepcutmp3.bat Cool&stuff.cueSo in %1 is only Cool even in %* is only Cool, but after the pcutmp3.bat ends, cmd.exe tries to execute a stuff.cue.To handle with this stuff you could use this, it catch all filenames by using the cmdcmdline variable.Btw. there is a line limit for drag&drop operations of ~2048 characters, in spite of the "standard" batch line limit of 8191 characters.

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echo   abc | XXhash64ordir /b abc | XXhash64

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C:\BIN>xxhash64.bat xxhash64.batError: Could not open 'E:\Windows\system32\cmd.ex': No such file or directory.DonePress any key to continue . . .