[Implement] PeekS additional argument

[BackupUser]

Restored from previous forum. Originally posted by Danilo.

Text$ = PeekS(*MemoryBuffer)

With varARGs available it would be nice
when this command could have an (optional)
additonal Parameter "Length":

Code: Select all

Text$ = PeekS(*MemoryBuffer, Length)

So it takes not a String until NULL is found
in memory -> it takes "Length" bytes only.

Very useful for conversion with other languages
and WinAPI.

If you have an ARRAY of BYTES or a fixed length
string (char), so you can convert it easily to
a String:

Code: Select all

myChars.b[10]
  [...some API function here...]
Text$ = PeekS(@myChar,10)

The same for PokeS() would be fine too, so
we can fill ARRAYs of BYTE easily:

Code: Select all

myChars.b[10]
myText.s = "123456789123456789"
PokeS(@myChar, myText, 10)

Thanks,
...Danilo

(registered PureBasic user)

[BackupUser]

Restored from previous forum. Originally posted by PB.

> So it takes not a String until NULL is found in memory -> it takes "Length"
> bytes only.

Why not just use: Text$=Left(PeekS(*MemoryBuffer),Length) ?


PB - Registered PureBasic Coder

Edited by - PB on 06 May 2002 20:07:36

[BackupUser]

Restored from previous forum. Originally posted by tinman.

> So it takes not a String until NULL is found in memory -> it takes "Length"
> bytes only.

Why not just use: Text$=Left(PeekS(*MemoryBuffer),Length) ?

Because your string in memory may not end with a NULL byte. I don't know how likely this is, but it could be possible.

Also, you would not want to work with huge strings every time you call the PeekS() command. For example, I use text files embedded into my exe for default languages and extract them using my own implementation of PeekS. However, I don't want PeekS to extract up to the end of the whole text file every time I call it as the text files could get quite big when the program is complete.

--
It's not minimalist - I'm increasing efficiency by reducing input effort.

[BackupUser]

Restored from previous forum. Originally posted by PB.

> > > So it takes not a String until NULL is found in memory -> it takes "Length"
> > > bytes only.
> >
> > Why not just use: Text$=Left(PeekS(*MemoryBuffer),Length) ?
>
> Because your string in memory may not end with a NULL byte.

I see... but I took Danilo's request to mean "read memory until X chars or
null string, whichever comes first". In that case, my tip would work. But
if that's not what he wants, then yes, you're right: my tip won't work.

PB - Registered PureBasic Coder

[BackupUser]

Restored from previous forum. Originally posted by tinman.

I see... but I took Danilo's request to mean "read memory until X chars or
null string, whichever comes first". In that case, my tip would work. But

That's what I thought he meant too, but in that case you may still run into problems with the second point I made. And do PB strings still have a 64k limit? If they do, another argument would be you do not want to PeekS more than 64k chars

--
It's not minimalist - I'm increasing efficiency by reducing input effort.

[BackupUser]

Restored from previous forum. Originally posted by Danilo.

>Why not just use: Text$=Left(PeekS(*MemoryBuffer),Length) ?

Because this are 2 commands for 1 = BLOATED EXE

Text$=PeekS(*MemoryBuffer,Length)
is faster to type, so i can write
at least 300 lines more per hour...

cya,
...Danilo
Every Byte counts. Same for seconds.

(registered PureBasic user)

[BackupUser]

Restored from previous forum. Originally posted by fred.

I think it's for performance reason than I will make it. Imagine, you have a 1000 bytes length string. If you want only the first 10 bytes, PeekS() will read the whole 1000 bytes (until 0 is encounter) and then left will return the first 10 bytes. Not very good

Fred - AlphaSND

[BackupUser]

Restored from previous forum. Originally posted by Franco.

I think it's for performance reason than I will make it. Imagine, you have a 1000 bytes length string. If you want only the first 10 bytes, PeekS() will read the whole 1000 bytes (until 0 is encounter) and then left will return the first 10 bytes. Not very good

But what if you don't know how long the String is

Please If you change something accept the following:

PeekS(*MemoryBuffer,0)

for a null terminated string (or something like that...)
my 2c


Have a nice day...
Franco

Sometimes you have to go a lonely way to accomplish genius things.

[BackupUser]

Restored from previous forum. Originally posted by fred.

The length parameter will be optionnal.

Fred - AlphaSND