Created
September 1, 2011 03:41
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CMD Batch file implementation of strlen
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| @echo off | |
| setlocal ENABLEEXTENSIONS ENABLEDELAYEDEXPANSION | |
| call :strlen "%~1" | |
| echo strlen("%~1") == !ERRORLEVEL! | |
| goto :EOF | |
| :strlen | |
| setlocal ENABLEEXTENSIONS ENABLEDELAYEDEXPANSION | |
| set __LEN=0 | |
| set __LEN_S=%~1 | |
| :strlen_loop | |
| if "!__LEN_S!"=="" exit /B %__LEN% | |
| for %%Q IN (32 16 8 4 2) DO if NOT "!__LEN_S:~%%Q!"=="" set /A __LEN=!__LEN!+%%Q&set __LEN_S=!__LEN_S:~%%Q!&goto :strlen_loop | |
| set /A __LEN=!__LEN!+1&set __LEN_S=!__LEN_S:~1!&goto :strlen_loop |
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Should be relatively efficient (as these things go) because it tries to break off 32-character chunks at a time, instead of doing it character by character.