[Gambas-user] External C function usage error - IPC queue usage

[Yahoo]

Hello,

This is my workaround about the issue of how to convert to octal:



' Gambas module file

Library "libc:6"

' Library 
Private Extern strtoul(mode As Pointer, dechet As Pointer, base As Integer) As Integer


Public Sub Main()

  Print "Example, mode '0660' = " & convert_octal_mode("0660")

End

Private Function convert_octal_mode(mode As String) As Short

  ' Fonction to convert an Unix mode text to an integer

  Dim ResultPerm As Short

  Dim sMode As String
  Dim sDechet As Pointer

  If mode = "" Or Len(mode) <> 4 Then
    Print "Unix string perms not valid ! [" & mode & "]  Example: 0644"
    Return IPC_ERROR
  Endif

  sMode = mode

  ResultPerm = CShort(strtoul(VarPtr(sMode), sDechet, 8))
  If ResultPerm = 0 Then
    Print "Unix string perms not valid ! [" & sMode & "]"
    Return IPC_ERROR
  Endif

  Return ResultPerm

End




Olivier
Le January 23, 2018 à 14:43:03, T Lee Davidson (t.lee.davidson at gmail.com) a écrit:

On 01/23/2018 11:40 AM, Fabien Bodard wrote:
> 2018-01-23 1:05 GMT+01:00 T Lee Davidson <t.lee.davidson at gmail.com <mailto:t.lee.davidson at gmail.com>>:
>  
> On 01/22/2018 06:58 PM, Doug Hutcheson wrote:
> >>
> > Hi Lee. Would it not be "&0" (ampersand zero) not "&o" ?
> > Just a hunch.
> > Cheers,
> > Doug
>  
> According to http://gambaswiki.org/wiki/cat/constants <http://gambaswiki.org/wiki/cat/constants>, "&0" would be a
> hexadecimal representation.
>  
> I tried '&0600'. Result in decimal: 1536.
>  
>  
> Hexadecimal short signed integers.&H1F5, &HFFFF, &H0000FFFF, &FFFF
> Hexadecimal signed integers.                &H10BF332E, &10BF332E
> Hexadecimal unsigned integers.        &H8000&, &HFFFF&
> Binary integers.                                &X1010010101, %101001011
>  
> Where did you read that,  Lee ?
>  
>  http://gambaswiki.org/wiki/cat/constants
>  
> There is a lack between doc and gb source code ...
>  
> --  
> Fabien Bodard
>  

Where did I read, what, Fabien? That "&0" would be a hexadecimal representation?

From the first two lines you posted from the referenced doc page. Take a look at the last example on each of those lines.

"&FFFF": Ampersand followed by a hexadecimal number. "0" is a hexadecimal number.
"&10BF332E": Again, ampersand followed by a hexadecimal number.

Or, maybe that's not what you were referring to about what I read.

And yes, as Tobi pointed out, the doc doesn't quite reflect the state of the source code.


--  
Lee

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