Hi,
It's possible to create a file with only zero inside simply by this command if
you want:
dd if=/dev/zero of=file_to_create bs=1k count=8388608
Olivier Cruilles
Mail: linu...@club-internet.fr
Le 25 janv. 2010 à 10:47, Doriano Blengino a écrit :
>
> Doriano Blengino ha scritto:
>>
>> The
Hi,
May be I've to elaborate a little bit?
I see the process like this:
1) you transpose each cell of your initial array to a pixel
of a picture where the coordinates of the pixel is equal to
the coordinate of the cell and the grey color of the pixel
is equal to the elevation in the cell
2) yo
Doriano Blengino ha scritto:
>
> The subroutine could look something like this:
>
> sub square_diamond(left, right, top, bottom as integer)
>
> step = (right+left) / 2
>
SORRY: step = (right - left) / 2
Urgh...
Regards,
Doriano
kevinfishburne ha scritto:
> Doriano Blengino wrote:
>
>> Read carefully the documentation about the WRITE instruction - in the
>> first few lines you find the explanation. When you write something out,
>> you can specify the length of the data you write. If you don't specify
>> it, gambas wi
Hi,
I've just a crude idea and know nothing more on this subject!
If you assume that each value in your big array is a color
value instead of an integer, may be you can find some
graphic effect wich simulate your algorithm.
It seems to me that it's like to find an intermediate color
between 2 ot
Doriano Blengino wrote:
>
> Read carefully the documentation about the WRITE instruction - in the
> first few lines you find the explanation. When you write something out,
> you can specify the length of the data you write. If you don't specify
> it, gambas will do it for you, and this is wha
> Public Sub Button1_Click()
>
> Dim hFile As File
> Dim LastChar As Byte
>
> hFile = Open bigfile For Input
>
> ' Should get 3930677248
> Debug Lof(hFile)
>
> Seek #hFile, 3930677241
>
> ' Should get 3930677241
> Debug Seek(hFile)
>
> Read #hFile, LastChar
>
--> Beware! T
kevinfishburne ha scritto:
> Kadaitcha Man wrote:
>
>> Have you tried using a Long instead of an Integer?
>>
>>
>>
>> :)
>>
>>
>
> Haha, that gave me a good laugh. When I discovered the "bug" was just me
> being a jackass I practically did the Snoopy dance I was so overjoyed.
> Simple prob
Kadaitcha Man wrote:
>
> Have you tried using a Long instead of an Integer?
>
>
>
> :)
>
Haha, that gave me a good laugh. When I discovered the "bug" was just me
being a jackass I practically did the Snoopy dance I was so overjoyed.
Simple problems are always the best once you finally figur
On 24 January 2010 16:08, kevinfishburne
wrote:
> Praise God, I was incorrect. I was foolishly using too small a datatype
> (integer) when calculating the seek position. Now that I switched it to long
> all is well. :)
Have you tried using a Long instead of an Integer?
:)
---
On 24 January 2010 16:02, kevinfishburne
wrote:
> Excellent, thanks. I seem to have found something horrifying while trying to
> create the file using GAMBAS however; using the SEEK statement with an
> argument greater than 2 GB raises a "Bad argument" error. While that doesn't
> affect my abilit
kevinfishburne wrote:
>
> Excellent, thanks. I seem to have found something horrifying while trying
> to create the file using GAMBAS however; using the SEEK statement with an
> argument greater than 2 GB raises a "Bad argument" error. While that
> doesn't affect my ability to create the file, i
Kadaitcha Man wrote:
>
> In a terminal, type:
>
> info coreutils 'dd'
>
> You only need create the file once, then copy it whenever you need to
> during testing. If you really must create the file every time, let dd
> do it by using Gambas' Exec command.
>
Excellent, thanks. I seem to have f
65537
This is the absolute fastest way to do it.
-Fernando
-- Original Message ---
From: kevinfishburne
To: gambas-user@lists.sourceforge.net
Sent: Sat, 23 Jan 2010 19:21:33 -0800 (PST)
Subject: Re: [Gambas-user] fastest way to "zero-out" a huge binary file
> Ben
On 24 January 2010 14:21, kevinfishburne
wrote:
In a terminal, type:
info coreutils 'dd'
You only need create the file once, then copy it whenever you need to
during testing. If you really must create the file every time, let dd
do it by using Gambas' Exec command.
HTH
---
Benoît Minisini wrote:
>
> On Linux, If you seek and write past the real end of a file, then the file
> is
> automatically extended.
>
> So the simplest is writing where you want in the file only when you need.
> Just
> don't do that randomly, to prevent the disk from seeking too much.
>
> M
> I need to create an 8 gigabyte binary file with zero values throughout it.
> Is there a faster way to do this than to create a big string of zeros and
> write it to the file multiple times? What I'm doing right now works but
> seems like a really ugly method:
>
> ' Zero-out the file.
> Zero =
I need to create an 8 gigabyte binary file with zero values throughout it. Is
there a faster way to do this than to create a big string of zeros and write
it to the file multiple times? What I'm doing right now works but seems like
a really ugly method:
' Zero-out the file.
Zero = Chr$(0) & Chr$(
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