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Ask: How to judge that the input variable is empty.

Purpose:
According to the content in set.ini such as E:\aaa1\bbb2.gho, that is, including drive letter, directory, file name, where the directory can be absent.
By separating the characters in set.ini, respectively obtain the variables of drive letter, directory, file name.
If there is no drive letter or no file name, it needs to be reset, otherwise continue.
The following is my code, please ask where is wrong? Thank you.

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:sub_18d
Rem Read the settings file Set.ini
For /f "tokens=*" %%i In (c:\_set.ini) Do (
Set drive=%%~di
Set directory=%%~pi
Set filename=%%~nxi
)
If %drive%=="" Goto sub_18h
If %filename%=="" Goto sub_18h
Goto sub_18e

:sub_18h
cls
Echo.
Echo The custom path format is incorrect, and it needs to be reset .
Echo.
pause
Goto Set

:sub_18e

如果 "#%drive%"=="#" 则跳转到sub_18h
如果 "#%filename%"=="#" 则跳转到sub_18h

Rem 读取设置文件Set.ini
For /f "tokens=*" %%i In (c:\_set.ini) Do (

set.ini？
_set.ini？

It's quite messy ^_^, by the way, the obtained path is \aaa1\.

@echo off

Rem 读取设置文件Set.ini

For /f "tokens=1,2* delims=:\" %%i In (c:\set.ini) Do (

       If  "%%k"==""   Goto sub_18h

       echo %%i %%j %%k

)

pause&goto :eof

:sub_18h

cls

Echo.

Echo 自定义路径格式不正确，需重新设置。

Echo.

pause

Try the following code:

@echo off

Rem Read the settings file Set.ini

For /f "tokens=1,2* delims=:\" %%i In (c:\set.ini) Do (

       If  "%%k"==""   Goto sub_18h

       echo %%i %%j %%k

)

pause&goto :eof

:sub_18h

cls

Echo.

Echo The custom path format is incorrect, please reset it .

Echo.

pause

Originally posted by a9319751 at 2006-12-11 03:16:
If "#%drive%"=="#" Goto sub_18h
If "#%filename%"=="#" Goto sub_18h



Rem Read configuration file Set.ini
For /f "tokens=*" %%i In (c:\_s ...

Sorry, it's _set.ini.

Originally posted by ccwan at 2006-12-11 03:43:
Try the following code:

@echo off

Rem Read the configuration file Set.ini

For /f "tokens=1,2* delims=:\" %%i In (c:\set.ini) Do (

       If  "%%k"==""   Goto sub_1 ... 



There is a problem with this code, that is, an error message appears when there is no K value, but the format like E:\bbb2.gho should be allowed.

When there is no drive letter in the path, your code will take the current drive letter. So, %drive% is never empty.

Originally posted by ccwan at 2006-12-11 05:36:
When there is no drive letter in the path, your code will take the current drive letter. So, %drive% is never empty.

The problem is that an empty directory is also not acceptable. For example, e:\sys.gho, which is actually saved to the root directory. I want this to be okay.

:
:sub_18d
Rem Read the settings file Set.ini
For /f "tokens=*" %%i In (c:\_set.ini) Do (
Set drive=%%~di
Set directory=%%~pi
Set filename=%%~nxi
)
If "%drive%"=="" Goto sub_18h
If "%filename%"=="" Goto sub_18h
Goto sub_18e

:sub_18h
cls
Echo.
Echo The custom path format is incorrect, please reset it .
Echo.
pause
Goto Set

:sub_18e
pause

re a9319751:

"" is one place, but you'll know when you try. When there's no *.gho, directory=\ still doesn't work.

Last edited by ccwan on 2006-12-1人 at 06:17 AM ]

re ccwan
I tried
e:\sys.gho
e:\sys\sys.gho
e:\
All are okay

Last edited by a9319751 on 2006-12-11 at 06:24 AM ]

According to the modification of building 2, it seems okay.
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:sub_18d
Rem Read the configuration file _Set.ini
For /f "tokens=*" %%i In (c:\_set.ini) Do (
Set drive=%%~di
Set directory=%%~pi
Set filename=%%~nxi
)

If "#%drive%"=="#" Goto sub_18h
If "#%filename%"=="#" Goto sub_18h
Goto sub_18e

:sub_18h
cls
Echo.
Echo The custom path format is incorrect, please reset it .
Echo.
pause
Goto Set_0

:sub_18e

Then I don't understand. There's no problem with E:\aaa1\bbb2.gho here, but an error occurs when accessing E:\aaa1.

re ccwan
Yes, I didn't test this just now. This is an error.

:
:sub_18d
Rem Read the configuration file Set.ini
For /f "tokens=*" %%i In (a.txt) Do (
Set drive=%%~di
Set directory=%%~pi
Set filename=%%~nxi
If "%%~nxi"=="%%~ni" Goto sub_18h
)

If "%drive%"=="" Goto sub_18h
If "%filename%"=="" Goto sub_18h
Goto sub_18e

:sub_18h

Echo.
Echo The custom path format is incorrect, please reset it .
Echo.
pause
Goto Set

:sub_18e
Echo Custom
pause

Added a sentence