%~z1 Problems

  • Thread starter Thread starter Bell,Nathan
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Bell,Nathan

All,

I am writing a cmd script and as a part of it I want it to check a file
size and do a zip+split if larger than a certain size (3.8GB) otherwise do
just a zip. When I try to store the filesize variable on anything that is a
large file i.e: 3.8GB I get an "Invalid number, numbers must be less than
32bits of precision" error, which to me means that the number is too big but
I don't see how I can convert it to something smaller. I tried dividing it
first (to get MB instead of bytes, but that did not work either. Can anyone
assist? Here is the script:

@echo off
REM %1 = path to filename (source)
REM %2 = zip file name (target)
REM %3 = zip split filename (target)
REM %4 = password for zip file
SET/a filesize=%~z1
REM echo %filesize% MB
REM pause

U:
CD\mssql$b\backup\dbextraction
IF %filesize% GTR 4101253364 (goto:zipsplit) else (goto:zip)

goto:eof


:zipsplit
echo ***ZIPSplittingfile***
wzzip -s%4 %2 %1
wzzip -ys3984589 %2 %3
pause
goto:eof
:zip
echo ***Zippingfile***
wzzip -s%4 %2 %1
pause
goto:eof
 
Bell said:
All,

I am writing a cmd script and as a part of it I want it to check a file
size and do a zip+split if larger than a certain size (3.8GB) otherwise do
just a zip. When I try to store the filesize variable on anything that is
a large file i.e: 3.8GB I get an "Invalid number, numbers must be less
than 32bits of precision" error, which to me means that the number is too
big but I don't see how I can convert it to something smaller. I tried
dividing it first (to get MB instead of bytes, but that did not work
either. Can anyone assist? Here is the script:

@echo off
REM %1 = path to filename (source)
REM %2 = zip file name (target)
REM %3 = zip split filename (target)
REM %4 = password for zip file
SET/a filesize=%~z1
REM echo %filesize% MB
REM pause

U:
CD\mssql$b\backup\dbextraction
IF %filesize% GTR 4101253364 (goto:zipsplit) else (goto:zip)

goto:eof


:zipsplit
echo ***ZIPSplittingfile***
wzzip -s%4 %2 %1
wzzip -ys3984589 %2 %3
pause
goto:eof
:zip
echo ***Zippingfile***
wzzip -s%4 %2 %1
pause
goto:eof
Click to expand...

sure.

treat the filesize as a character-string and remove the last 3 characters,
making the result trunc(size/1000)

Under XP, this can be accomplished by

set filesize=%~z1
set filesize=%filesize:~0,-3%

but I'm not sure whether the "-" syntax is supported in W2K - nevertheless,
since the string is numeric by definition, lopping off the final 3
characters will leave a numeric result which I believe should be in the
required range (no need for the /a on the set)

If you're going to be really, really picky about the size, split the %~z1
STRING (and it's a string of characters[0..9]) into two separate variables
and play with them.

If 2K doesn't support the "-" syntax, then you might be able to get away
with splitting the size:

set filesize=%~z1
set filesizemsb=%filesize:~0,3%
set filesize=%filesize:~3%

which should place the first 3 chars of the size into filesizemsb and the
remainder into filesize. Your job to figure it out from there...

Tips & tricks in alt.msdos.batch.nt

set /?

from the prompt for SET docco - but fundamentally, it's a STRING
manipulation which MAY be used in arithmetic mode by specifying /A
 
Bell said:
All,

I am writing a cmd script and as a part of it I want it to check a file
size and do a zip+split if larger than a certain size (3.8GB) otherwise do
just a zip. When I try to store the filesize variable on anything that is
a large file i.e: 3.8GB I get an "Invalid number, numbers must be less
than 32bits of precision" error, which to me means that the number is too
big but I don't see how I can convert it to something smaller. I tried
dividing it first (to get MB instead of bytes, but that did not work
either. Can anyone assist? Here is the script:

@echo off
REM %1 = path to filename (source)
REM %2 = zip file name (target)
REM %3 = zip split filename (target)
REM %4 = password for zip file
SET/a filesize=%~z1
REM echo %filesize% MB
REM pause

U:
CD\mssql$b\backup\dbextraction
IF %filesize% GTR 4101253364 (goto:zipsplit) else (goto:zip)

goto:eof


:zipsplit
echo ***ZIPSplittingfile***
wzzip -s%4 %2 %1
wzzip -ys3984589 %2 %3
pause
goto:eof
:zip
echo ***Zippingfile***
wzzip -s%4 %2 %1
pause
goto:eof
Click to expand...

You could try just truncating the last three digits of the size to give you
an approximate value in KB rather than bytes, perhaps something like this:

SET/a filesize=%~z1
set filesize=++++++++++++++++++++%filesize%
set filesize=%filesize:~-20%
set filesize=%filesize:~0,17%
set filesize=%filesize:+=%

This would be an approximation, of course. You could get a bit closer by
converting this KB value to MB by dividing it by 1049.

/Al
 
I am writing a cmd script and as a part of it I want it to check a file
size and do a zip+split if larger than a certain size (3.8GB) otherwise do
just a zip. When I try to store the filesize variable on anything that is a
large file i.e: 3.8GB I get an "Invalid number, numbers must be less than
32bits of precision" error, which to me means that the number is too big but
I don't see how I can convert it to something smaller. I tried dividing it
first (to get MB instead of bytes, but that did not work either. Can anyone
assist? Here is the script:

@echo off
REM %1 = path to filename (source)
REM %2 = zip file name (target)
REM %3 = zip split filename (target)
REM %4 = password for zip file
SET/a filesize=%~z1
REM echo %filesize% MB
REM pause

U:
CD\mssql$b\backup\dbextraction
IF %filesize% GTR 4101253364 (goto:zipsplit) else (goto:zip)

goto:eof


:zipsplit
echo ***ZIPSplittingfile***
wzzip -s%4 %2 %1
wzzip -ys3984589 %2 %3
pause
goto:eof
:zip
echo ***Zippingfile***
wzzip -s%4 %2 %1
pause
goto:eof
Click to expand...

See if this gives you an idea:

@echo off
SET filesize=%~z1
echo %filesize%
set filesize=%filesize:~0,-3%
echo %filesize%
set filesize=%filesize:~0,-3%
echo %filesize%
pause
IF %filesize% GTR 4101 (goto:zipsplit) else (goto:zip)
 
Jean Pierre Daviau said:
Peaking in:

What is the meaning of this:? %~z1
set filesize=%~z1
Click to expand...

The size of the file, the name of which is provided as the first argument.

The ~ modifiers are documented under FOR/? (naturally...) but work with SET
.... paramref
 
billious said:
The ~ modifiers are documented under FOR/? (naturally...) but work with SET
... paramref
Click to expand...
Well, I think that should read:
but work with call ... paramref

They are also explained in "call /?"

The :~ commands in variables explained in "set /?" are for substring
handling (but do also work outside set statements)
 
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