*MemoryBuffer

[rndrei]

Tell me how to read the right byte from memory?

Code: Select all

*buffer = AllocateMemory(1000)
byte=*buffer(10)
byte2=*buffer[50]

[Mijikai]

Example:

Code: Select all

EnableExplicit

Structure BYTE_STRUCT
  byte.b[0]
EndStructure

Procedure.i main()
  Protected.BYTE_STRUCT *buffer
  *buffer = AllocateMemory(1000)
  If *buffer
    *buffer\byte[10] = $FF
    
    Debug *buffer\byte[10]
    
    ShowMemoryViewer(*buffer,1000)
    
    FreeMemory(*buffer)
  EndIf
  ProcedureReturn #Null
EndProcedure

End main()

[infratec]

Read the help about AllocateMemory() and look at the example.
There you can find PokeS()
Then press at the bottom of the help on Memory durectory and look at the available commands.

Hint: look deeper at the Peek commands

[Quin]

I've told you this before and I'll tell you again:
Please go read the PB docs in-depth. Many programming languages struggle with a lack of documentation, PureBasic is not one of them. The english isn't always spotless but it's super well-written and clear documentation.
What you want are the peek/poke commands under the Memory section of the help file PeekB to peek (view) a byte, PeekS to peek a string, etc.

[Piero]

Example:

Thanks!

Peek Poke Array on Mac:
https://www.purebasic.fr/english/viewto ... 49#p633249

[Demivec]

Tell me how to read the right byte from memory?

Code: Select all

*buffer = AllocateMemory(1000)
byte=*buffer(10)
byte2=*buffer[50]

The short answer is to do as Quin said and read the help manual instead of asking forum users to quote each page of it to you.

Here's a longer answer with no additional explanation:

Code: Select all

*buffer = AllocateMemory(1000)
byte = PeekB(*buffer + 10)
byte2 = PeekB(*buffer + 50)
LifeUniverseNEverything = (Bool(PeekB(*buffer + '*') > '*' ) +
                           Bool(PeekB(*buffer + '*') < '*' ) +
                           Bool(PeekB(*buffer + '*') = '*' )) * '*'

[Piero]

Why are you gurus so angry @rndrei?
Sometimes (even if you know a bit of english!) it's not very easy to browse help………

PS: rndrei, did you see that you can also use the "PureBasic documentation in PDF format (full version)" to search stuff?

[jacdelad]

Because he found AllocateMemory which includes an example which should lead you to the right way.

[Piero]

Because he found AllocateMemory which includes an example which should lead you to the right way.

Apropos: in my tests (but I tried on win 11 arm VM) the "array" method is always faster than peek/poke
https://www.purebasic.fr/english/viewto ... 49#p633249

[Demivec]

Why are you gurus so angry @rndrei?
Sometimes (even if you know a bit of english!) it's not very easy to browse help………

The help file is available in German and French as well. In addition, the online html version can be translated into other languages with the Chrome web browser's 'translate' option for web pages.

[Piero]

'translate' option for web pages.

I guess you think so because your native language is english, so the automatic "translations" are generally decent; if that's the case, I can assure you that if you were, e.g., italian, you would "think VERY different" (especially if it involves pineapple pizzas)

[AZJIO]

https://www.purebasic.fr/english/viewto ... 35#p639035

[Demivec]

'translate' option for web pages.

I guess you think so because your native language is english, so the automatic "translations" are generally decent; if that's the case, I can assure you that if you were, e.g., italian, you would "think VERY different" (especially if it involves pineapple pizzas)

Languages and writing styles come in many flavors and are used in different and sometimes dicey levels of fluency. I mention automatic translations only as an additional option to having no translation. When I started with PureBasic the English version of the help file had many issues due to it being written by non native speakers. I survived and it has improved over the years. In addition to English I also communicate in German, French, and American Sign Language and have been a student of other languages including Spanish, Russian, Mandarin, and Japanese and would study many more if not for the lack of time. Some things do not translate well between different languages but a rough translation is often better than no translation.
Speaking of pineapple pizzas, I ate pineapple pizza con gusto for dinner. They're one of my favorites, among many others of course.

[Mijikai]

Playing around:

Code: Select all

EnableExplicit

Macro CharBuffer(_buffer_);<- defines cmem!
  !char* cmem = (char*)p_#_buffer_;
EndMacro

Macro CharSet(_index_,_value_)
  !cmem[_index_] =  _value_;
EndMacro

Macro CharGet(_index_,_byte_)
  !v_#_byte_ = cmem[_index_];
EndMacro

Procedure.i main()
  Protected *buffer
  Protected.b byte
  *buffer = AllocateMemory(1000)
  If *buffer
    CharBuffer(buffer)
    CharSet(10,255)
    CharGet(10,byte)
    Debug byte
    ShowMemoryViewer(*buffer,1000)
    FreeMemory(*buffer)
  EndIf
  ProcedureReturn #Null
EndProcedure

End main()

[rndrei]

Thanks for the different options, but I have never found documentation about reading the right byte from the buffer!
And I drank cappuccino!