file IO operations

Community Support
1

Hello to all.

Can this code be converted from c# into code in kdb?

I had read about read1, but I did not see anything about position of stream for writing.

static int GetInt32(string path, int index) { FileStream stream = new FileStream(path, FileMode.Open); stream.Position = index * 4; byte[] bytes = new byte[4]; stream.Read(bytes, 0, 4); int value = BitConverter.ToInt32(bytes, 0); stream.Close(); return value; } static void SetInt32(string path, int index, int value) { FileStream stream = new FileStream(path, FileMode.OpenOrCreate); stream.Position = index * 4; byte[] bytes = BitConverter.GetBytes(value); stream.Write(bytes, 0, 4); stream.Close(); }

2

I use the dd linux command. I have yet to find any built-in kdb functions to do that.
http://stackoverflow.com/questions/15238100/use-dd-to-write-data-starting-from-a-specific-location

3

I am Windows user, so I do not have this command…

4

Hi,

read1 supports (file;offset;length) format.

WBR, Andrey Kozyrev 

5

Hello Andrew.
Yes I know about read0/read1, I already wrote about this.

2015-09-28 12:52 GMT+03:00 Andrew Kozyrev <quintanar401@gmail.com>:

Hi,

read1 supports (file;offset;length) format.

WBR, Andrey Kozyrev 

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6

If you are on windows, use cygwin dd.exe, C stdio, or C++ fstream to perform random writes.