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b1528932



Joined: 21 May 2010
Posts: 287
b1528932
When i input data via keyboard, os must translate key signal into proper character.

How is it done? From my understanding, foolowing this:

- keyboard interrupts cpu
- cpu read usb/ps2 register wich is mapped to real keyboard hardware
- cpu has now scan code
- scan code is translated by OS into virtual key code depending on driver (keyboard layout)
- virtual key code is a universal name of a key
- now os take state of keyboard, and translate virtual key code into code pint using code page, or holds if its a dead char waiting for another V-code
- how does windows manage code points? how they are stored in code page? is it utf-16, or something else?
- now translated character is sent to something

WM_CHAR will always contain utf16 character, is it true on windows 9x and nt?

when storing file anme in ntfs, what encoding is used? I guess its utf16, am i right? What about FAT in windows 9x/NT? Is it also utf16, or something else with specyfied code page?


Where do i find such knowleadge about my questions, i belive its inefficient to ask everytime when i dont understand something.
Post 22 Dec 2010, 11:30
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revolution
When all else fails, read the source


Joined: 24 Aug 2004
Posts: 17287
Location: In your JS exploiting you and your system
revolution
NTFS internally uses UNICODE (not UTF-16) for filenames.

FAT uses ASCII (or byte, or CHAR, or something like that anyway).

WM_CHAR return a TCHAR (size depends upon A or W call made to the API)

NT/2K/XP/++ uses UNICODE for all internal functions and is said to be more efficient when running UNICODE apps.

95/98/ME uses ASCII for all internal functions.
Post 22 Dec 2010, 12:01
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b1528932



Joined: 21 May 2010
Posts: 287
b1528932
and code points in code pages?
when i translate character from 1 page to another, it must go through a code point list. Whats used there?
Post 22 Dec 2010, 16:35
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